Split directories better

29 files changed, 7240 insertions, 0 deletions

diff --git a/mcserverproxy/announce.c b/mcserverproxy/announce.c
new file mode 100644
index 0000000..13ef423
--- /dev/null
+++ b/mcserverproxy/announce.c
@@ -0,0 +1,116 @@
+#include <inttypes.h>
+#include <sys/socket.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "main.h"
+#include "uring.h"
+#include "announce.h"
+#include "server.h"
+#include "ptimer.h"
+
+struct announce {
+	uint64_t value;
+	struct uring_task task;
+	struct ptimer_task ptask;
+	int mcast_fd;
+};
+
+static void
+announce_cb(struct ptimer_task *ptask)
+{
+	struct announce *announce = container_of(ptask, struct announce, ptask);
+	struct server *server;
+
+	assert_return(ptask);
+	assert_task_alive(DBG_ANN, &announce->task);
+
+	debug(DBG_ANN, "announcing servers");
+	list_for_each_entry(server, &cfg->servers, list)
+		server_announce(server, announce->mcast_fd);
+}
+
+static void
+announce_free(struct uring_task *task)
+{
+	struct announce *announce = container_of(task, struct announce, task);
+
+	assert_return(task);
+	debug(DBG_ANN, "task %p, announce 0x%p, mcast_fd: %i",
+	      task, announce, announce->mcast_fd);
+	close(announce->mcast_fd);
+	xfree(announce);
+}
+
+void
+announce_refdump()
+{
+	assert_return_silent(cfg->announce);
+
+	uring_task_refdump(&cfg->announce->task);
+}
+
+void
+announce_delete()
+{
+	assert_return_silent(cfg->announce);
+
+	debug(DBG_ANN, "called");
+	announce_stop();
+	uring_task_destroy(&cfg->announce->task);
+	cfg->announce = NULL;
+}
+
+void
+announce_stop()
+{
+	struct announce *announce = cfg->announce;
+
+	assert_return_silent(announce);
+
+	ptimer_del_task(&announce->ptask);
+}
+
+void
+announce_start(unsigned duration)
+{
+	struct announce *announce = cfg->announce;
+	unsigned times;
+
+	assert_return_silent(announce);
+
+	if (duration == 0)
+		times = 0;
+	else
+		times = MAX(announce->ptask.times,
+			    DIV_ROUND_UP(duration, cfg->announce_interval));
+
+	announce->ptask.times = times;
+	ptimer_add_task(&announce->ptask);
+}
+
+void
+announce_init()
+{
+	struct announce *announce;
+	int sfd;
+ 
+	assert_return(!cfg->announce);
+	assert_return_silent(cfg->announce_interval > 0);
+
+	announce = zmalloc(sizeof(*announce));
+	if (!announce)
+		die("malloc: %m");
+
+	sfd = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+	if (sfd < 0)
+		die("socket: %m");
+
+	uring_task_init(&announce->task, "announce", uring_parent(), announce_free);
+	ptask_init(&announce->ptask, cfg->announce_interval, 0, announce_cb);
+	announce->mcast_fd = sfd;
+	cfg->announce = announce;
+}
+
diff --git a/mcserverproxy/announce.h b/mcserverproxy/announce.h
new file mode 100644
index 0000000..77a36f2
--- /dev/null
+++ b/mcserverproxy/announce.h
@@ -0,0 +1,14 @@
+#ifndef fooannouncehfoo
+#define fooannouncehfoo
+
+void announce_refdump();
+
+void announce_delete();
+
+void announce_stop();
+
+void announce_start(unsigned duration);
+
+void announce_init();
+
+#endif
diff --git a/mcserverproxy/config-parser.c b/mcserverproxy/config-parser.c
new file mode 100644
index 0000000..ffed7f1
--- /dev/null
+++ b/mcserverproxy/config-parser.c
@@ -0,0 +1,490 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <inttypes.h>
+
+#include "main.h"
+#include "config-parser.h"
+
+static void
+eat_whitespace_and_comments(char **pos)
+{
+	assert_return(pos && *pos);
+
+	while (true) {
+		while (isspace(**pos))
+			(*pos)++;
+
+		if (**pos != '#')
+			return;
+
+		while (**pos != '\r' && **pos != '\n' && **pos != '\0')
+			(*pos)++;
+	}
+}
+
+static char *
+get_line(char **pos)
+{
+	char *begin, *end;
+
+	assert_return(pos && *pos, NULL);
+
+	begin = *pos;
+	while (isspace(*begin))
+		begin++;
+
+	if (*begin == '\0')
+		return NULL;
+
+	end = begin;
+	while (*end != '\n' && *end != '\0')
+		end++;
+
+	if (*end == '\0')
+		*pos = end;
+	else
+		*pos = end + 1;
+
+	while (isspace(*end)) {
+		*end = '\0';
+		end--;
+	}
+
+	return begin;
+}
+
+static bool
+dnslookup(const char *name, uint16_t port, struct cfg_value *rvalue, bool async)
+{
+	struct sockaddr_in *in4;
+	struct sockaddr_in6 *in6;
+	struct dns_async tmp;
+	struct dns_async *dns;
+	int mode = async ? GAI_NOWAIT : GAI_WAIT;
+	struct addrinfo *results = NULL, *ai;
+	struct saddr *saddr = NULL;
+	bool rv = false;
+	int r;
+
+	assert_return(!empty_str(name) && strlen(name) < sizeof(dns->name) && port > 0 && rvalue, false);
+
+	if (async) {
+		rvalue->type = CFG_VAL_TYPE_ASYNC_ADDRS;
+		rvalue->dns_async = NULL;
+		dns = zmalloc(sizeof(*dns));
+		if (!dns) {
+			error("async DNS lookup of %s failed: %m", name);
+			goto out;
+		}
+		debug(DBG_DNS, "doing async DNS lookup of %s: %p", name, dns);
+	} else {
+		memset(&tmp, 0, sizeof(tmp));
+		dns = &tmp;
+		debug(DBG_DNS, "doing sync DNS lookup of %s", name);
+	}
+
+	sprintf(dns->name, "%s", name);	
+	sprintf(dns->port, "%" PRIu16, port);
+
+	dns->req.ai_family = AF_UNSPEC;
+	dns->req.ai_socktype = SOCK_STREAM;
+	dns->req.ai_protocol = 0;
+	dns->req.ai_flags = AI_NUMERICSERV;
+
+	dns->sev.sigev_notify = SIGEV_SIGNAL;
+	dns->sev.sigev_signo = SIGUSR1;
+	dns->sev.sigev_value.sival_ptr = dns;
+
+	dns->gcb.ar_name = dns->name;
+	dns->gcb.ar_service = dns->port;
+	dns->gcb.ar_request = &dns->req;
+
+	struct gaicb *gcbs[] = { &dns->gcb };
+
+	r = getaddrinfo_a(mode, gcbs, ARRAY_SIZE(gcbs), &dns->sev);
+	if (r != 0) {
+		error("getaddrinfo(%s:%" PRIu16 "): %s", name, port, gai_strerror(r));
+		goto out;
+	}
+
+	if (async) {
+		rvalue->dns_async = dns;
+		rv = true;
+		goto out;
+	}
+
+	results = dns->gcb.ar_result;
+
+	for (ai = results; ai; ai = ai->ai_next) {
+		saddr = zmalloc(sizeof(*saddr));
+		if (!saddr) {
+			error("sync DNS lookup of %s failed: %m", name);
+			goto out;
+		}
+
+		switch (ai->ai_family) {
+		case AF_INET:
+			in4 = (struct sockaddr_in *)ai->ai_addr;
+			saddr_set_ipv4(saddr, in4->sin_addr.s_addr, in4->sin_port);
+			error("addrstr: %s", saddr->addrstr);
+			list_add(&saddr->list, &rvalue->saddrs);
+			break;
+
+		case AF_INET6:
+			in6 = (struct sockaddr_in6 *)ai->ai_addr;
+			saddr_set_ipv6(saddr, &in6->sin6_addr, in6->sin6_port);
+			error("addrstr: %s", saddr->addrstr);
+			list_add(&saddr->list, &rvalue->saddrs);
+			break;
+
+		default:
+			error("getaddrinfo(%s:%s): unknown address family (%i)",
+			      dns->name, dns->port, ai->ai_family);
+			xfree(saddr);
+			break;
+		}
+	}
+
+	rv = true;
+
+out:
+	freeaddrinfo(results);
+	return rv;
+}
+
+static bool
+strtosockaddrs(const char *str, struct cfg_value *rvalue, bool async)
+{
+	struct saddr *saddr;
+	uint16_t port;
+	char *tmp;
+	struct list_head *list;
+	unsigned naddrs = 0;
+
+	assert_return(!empty_str(str) && rvalue, false);
+
+	rvalue->type = CFG_VAL_TYPE_ADDRS;
+	list = &rvalue->saddrs;
+	list_init(list);
+
+	if (*str == '[') {
+		/* IPv6, [a:b:c...h]:p or [*]:p */
+		debug(DBG_CFG, "attempting to parse IPv6 addr (%s)", str);
+
+		str++;
+		tmp = strchr(str, ']');
+		if (!tmp)
+			goto error;
+		*tmp = '\0';
+
+		saddr = zmalloc(sizeof(*saddr));
+		if (!saddr)
+			goto error;
+
+		/* early list_add to make sure saddr is free():d on error */
+		list_add(&saddr->list, list);
+
+		if (streq(str, "*"))
+			saddr->in6.sin6_addr = in6addr_any;
+		else if (inet_pton(AF_INET6, str, &saddr->in6.sin6_addr) <= 0)
+			goto error;
+
+		tmp++;
+		if (*tmp != ':')
+			goto error;
+
+		tmp++;
+		if (strtou16_strict(tmp, &port) < 0)
+			goto error;
+
+		saddr_set_ipv6(saddr, NULL, htons(port));
+		naddrs++;
+
+	} else if (*str == '*') {
+		/* IPv4, *:p */
+		debug(DBG_CFG, "attempting to parse IPv4 addr (%s)", str);
+
+		str++;
+		if (*str != ':')
+			goto error;
+
+		str++;
+		if (strtou16_strict(str, &port) < 0)
+			goto error;
+
+		saddr = zmalloc(sizeof(*saddr));
+		if (!saddr)
+			goto error;
+
+		saddr_set_ipv4(saddr, INADDR_ANY, htons(port));
+		list_add(&saddr->list, list);
+		naddrs++;
+
+	} else if ((tmp = strchr(str, ':'))) {
+		/* IPv4, a.b.c.d:p or IPv4/6 hostname:p */
+		debug(DBG_CFG, "attempting to parse IPv4 addr or hostname (%s)", str);
+
+		*tmp = '\0';
+		tmp++;
+		if (strtou16_strict(tmp, &port) < 0)
+			goto error;
+
+		saddr = zmalloc(sizeof(*saddr));
+		if (!saddr)
+			goto error;
+
+		if (inet_pton(AF_INET, str, &saddr->in4.sin_addr) > 0) {
+			debug(DBG_CFG, "got an IPv4:port (%s:%" PRIu16 ")", str, port);
+			saddr_set_ipv4(saddr, saddr->in4.sin_addr.s_addr, htons(port));
+			list_add(&saddr->list, list);
+			naddrs++;
+			goto success;
+		} 
+
+		xfree(saddr);
+		debug(DBG_CFG, "maybe got a hostname:port (%s:%" PRIu16 ")", str, port);
+		if (!dnslookup(str, port, rvalue, async))
+			goto error;
+
+	} else if (strtou16_strict(tmp, &port) == 0) {
+		/* Port */
+		debug(DBG_CFG, "attempting to parse a port number (%s)", str);
+
+		saddr = zmalloc(sizeof(*saddr));
+		if (!saddr)
+			goto error;
+
+		saddr_set_ipv6(saddr, &in6addr_any, htons(port));
+		list_add(&saddr->list, list);
+		naddrs++;
+
+		saddr = zmalloc(sizeof(*saddr));
+		if (!saddr)
+			goto error;
+
+		saddr_set_ipv4(saddr, INADDR_ANY, htons(port));
+		list_add(&saddr->list, list);
+		naddrs++;
+
+	} else {
+		/* Unknown */
+		error("unable to parse address: %s", str);
+		goto error;
+	}
+
+success:
+	switch (rvalue->type) {
+	case CFG_VAL_TYPE_ADDRS:
+		if (list_empty(list) || naddrs == 0) {
+			error("empty address list");
+			return false;
+		}
+
+		debug(DBG_CFG, "parsed to %u addresses", naddrs);
+		return true;
+
+	case CFG_VAL_TYPE_ASYNC_ADDRS:
+		debug(DBG_CFG, "looking up address asynchronously");
+		return true;
+
+	default:
+		error("invalid rvalue type");
+		rvalue->type = CFG_VAL_TYPE_INVALID;
+		break;
+	}
+
+error:
+	if (rvalue->type == CFG_VAL_TYPE_ADDRS && !list_empty(list)) {
+		struct saddr *tmp;
+
+		list_for_each_entry_safe(saddr, tmp, list, list) {
+			list_del(&saddr->list);
+			xfree(saddr);
+		}
+	}
+	return false;
+}
+
+/* Returns true if there's data left to parse in buf */
+bool
+config_parse_line(const char *filename, char **buf,
+		  struct cfg_key_value_map *kvmap, int *rkey,
+		  const char **rkeyname, struct cfg_value *rvalue)
+{
+	char *line, *tmp, *key;
+	int i;
+
+	assert_return(buf && *buf && kvmap && rkey && rkeyname && rvalue, false);
+
+	eat_whitespace_and_comments(buf);
+	line = get_line(buf);
+	if (!line)
+		return false;
+
+	debug(DBG_CFG, "%s: parsing config line: %s", filename, line);
+
+	tmp = line;
+	while (isspace(*tmp))
+		tmp++;
+
+	if (*tmp == '\0')
+		goto error;
+
+	key = tmp;
+	while (*tmp != '\0' && !isspace(*tmp))
+		tmp++;
+
+	if (*tmp == '\0')
+		goto error;
+
+	*tmp = '\0';
+	tmp++;
+
+	while (isspace(*tmp))
+		tmp++;
+
+	if (*tmp != '=')
+		goto error;
+
+	tmp++;
+	while (isspace(*tmp))
+		tmp++;
+
+	if (*tmp == '\0')
+		goto error;
+
+	for (i = 0; kvmap[i].key_name; i++) {
+		if (!streq(kvmap[i].key_name, key))
+			continue;
+
+		switch (kvmap[i].value_type) {
+
+		case CFG_VAL_TYPE_STRING:
+			rvalue->type = CFG_VAL_TYPE_STRING;
+			rvalue->str = tmp;
+			break;
+
+		case CFG_VAL_TYPE_UINT16: {
+			uint16_t v;
+
+			if (strtou16_strict(tmp, &v) < 0)
+				goto error;
+
+			rvalue->type = CFG_VAL_TYPE_UINT16;
+			rvalue->uint16 = v;
+			break;
+		}
+
+		case CFG_VAL_TYPE_ADDRS:
+			if (!strtosockaddrs(tmp, rvalue, false))
+				goto error;
+
+			if (rvalue->type != CFG_VAL_TYPE_ADDRS) {
+				error("invalid type returned from strtosockaddrs");
+				goto error;
+			}
+
+			if (list_empty(&rvalue->saddrs)) {
+				error("empty address list");
+				goto error;
+			}
+			break;
+
+		case CFG_VAL_TYPE_ASYNC_ADDRS:
+			if (!strtosockaddrs(tmp, rvalue, true))
+				goto error;
+
+			switch (rvalue->type) {
+			case CFG_VAL_TYPE_ADDRS:
+				if (list_empty(&rvalue->saddrs)) {
+					error("empty address list");
+					goto error;
+				}
+				break;
+
+			case CFG_VAL_TYPE_ASYNC_ADDRS:
+				if (!rvalue->dns_async) {
+					error("dns_async not set");
+					goto error;
+				}
+				break;
+
+			default:
+				error("invalid type returned from strtosockaddrs");
+				goto error;
+			}
+
+			break;
+
+		case CFG_VAL_TYPE_BOOL:
+			if (strcaseeq(tmp, "yes") || strcaseeq(tmp, "true")) {
+				rvalue->type = CFG_VAL_TYPE_BOOL;
+				rvalue->boolean = true;
+			} else if (strcaseeq(tmp, "no") || strcaseeq(tmp, "false")) {
+				rvalue->type = CFG_VAL_TYPE_BOOL;
+				rvalue->boolean = false;
+			} else {
+				error("invalid boolean value (%s)", tmp);
+				goto error;
+			}
+			break;
+
+		case CFG_VAL_TYPE_INVALID:
+			/* fall through */
+		default:
+			goto error;
+		}
+
+		/* sanity check */
+		if ((rvalue->type != kvmap[i].value_type) &&
+		    ((kvmap[i].value_type != CFG_VAL_TYPE_ASYNC_ADDRS) &&
+		     (rvalue->type != CFG_VAL_TYPE_ADDRS))) {
+			error("rvalue->type != kvmap->type");
+			goto error;
+		}
+
+		*rkey = kvmap[i].key_value;
+		*rkeyname = kvmap[i].key_name;
+		return true;
+	}
+
+error:
+	/* FIXME: the line is already mangled here, a line number would be nice */
+	error("%s: invalid config line: %s", filename, line);
+	rvalue->type = CFG_VAL_TYPE_INVALID;
+	*rkey = 0;
+	*rkeyname = NULL;
+	return true;
+}
+
+bool
+config_parse_header(const char *filename, const char *title, char **buf)
+{
+	char *line;
+
+	assert_return(!empty_str(filename) && !empty_str(title) && buf && *buf, false);
+
+	eat_whitespace_and_comments(buf);
+
+	line = get_line(buf);
+	if (!line) {
+		error("%s: missing header in configuration file", filename);
+		return false;
+	} else {
+		char titlehdr[strlen(title) + 3];
+
+		sprintf(titlehdr, "[%s]", title);
+		if (!streq(line, titlehdr)) {
+			error("%s: incorrect header in configuration file", filename);
+			return false;
+		}
+	}
+
+	return true;
+}
diff --git a/mcserverproxy/config-parser.h b/mcserverproxy/config-parser.h
new file mode 100644
index 0000000..3a117a3
--- /dev/null
+++ b/mcserverproxy/config-parser.h
@@ -0,0 +1,59 @@
+#ifndef fooconfigparserhfoo
+#define fooconfigparserhfoo
+
+#define _GNU_SOURCE
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <signal.h>
+
+enum cfg_value_type {
+	CFG_VAL_TYPE_INVALID,
+	CFG_VAL_TYPE_STRING,
+	CFG_VAL_TYPE_UINT16,
+	CFG_VAL_TYPE_ADDRS,
+	CFG_VAL_TYPE_ASYNC_ADDRS,
+	CFG_VAL_TYPE_BOOL,
+};
+
+struct dns_async;
+
+typedef void (dns_cb_t)(struct dns_async *);
+
+struct dns_async {
+	char name[FQDN_STR_LEN + 1];
+	char port[PORT_STR_LEN + 1];
+	struct addrinfo req;
+	struct gaicb gcb;
+	struct sigevent sev;
+	dns_cb_t *cb;
+	void *priv;
+	struct list_head list;
+};
+
+struct cfg_key_value_map {
+	const char *key_name;
+	int key_value;
+	enum cfg_value_type value_type;
+};
+
+struct cfg_value {
+	enum cfg_value_type type;
+	union {
+		const char *str;
+		uint16_t uint16;
+		struct list_head saddrs;
+		struct dns_async *dns_async;
+		bool boolean;
+	};
+};
+
+bool config_parse_line(const char *filename, char **buf,
+		       struct cfg_key_value_map *kvmap,
+		       int *rkey, const char **rkeyname,
+		       struct cfg_value *rvalue);
+
+bool config_parse_header(const char *filename,
+			 const char *title, char **buf);
+
+#endif
diff --git a/mcserverproxy/idle.c b/mcserverproxy/idle.c
new file mode 100644
index 0000000..c49846d
--- /dev/null
+++ b/mcserverproxy/idle.c
@@ -0,0 +1,378 @@
+#define _GNU_SOURCE
+#include <inttypes.h>
+#include <sys/socket.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include "main.h"
+#include "uring.h"
+#include "server.h"
+#include "idle.h"
+#include "ptimer.h"
+
+struct idle {
+	struct ptimer_task ptask;
+	struct uring_task task;
+};
+
+static inline void
+write_byte(char **pos, char byte)
+{
+	assert_return(pos && *pos);
+
+	**pos = byte;
+	(*pos)++;
+}
+
+#define MC_HELO 0x00
+#define MC_NEXT_STATE_STATUS 0x01
+#define MC_GET_STATUS 0x00
+#define MC_VARINT_MAX_BYTES 5
+#define MC_STATUS_REPLY 0x00
+#define MC_UNDEFINED_VERSION -1
+
+static inline void
+write_varint(char **pos, int32_t orig)
+{
+	assert_return(pos && *pos);
+
+	uint32_t val = (uint32_t)orig;
+
+	while (val) {
+		**pos = val & 0x7f;
+		val >>= 7;
+		if (val > 0)
+			**pos |= 0x80;
+		(*pos)++;
+	}
+}
+
+/*
+ * return value:
+ * positive = varint parsed
+ * zero = need more bytes
+ * negative = error
+ */
+static inline int
+read_varint(char **pos, size_t *remain, int32_t *res)
+{
+	unsigned consumed;
+	uint32_t val = 0;
+
+	assert_return(pos && *pos && remain && res, -1);
+
+	for (consumed = 1; consumed <= *remain; consumed++) {
+		uint32_t tmp;
+
+		tmp = **pos & 0x7f;
+		val += (tmp << (7 * (consumed - 1)));
+		(*pos)++;
+
+		if (!(tmp & 0x80))
+			break;
+	}
+
+	if (consumed > *remain)
+		return 0;
+	else if (consumed > MC_VARINT_MAX_BYTES)
+		return -1;
+
+	*remain -= consumed;
+	*res = (int32_t)val;
+	return 1;
+}
+
+static inline void
+write_bytes(char **pos, const char *bytes, size_t n)
+{
+	assert_return(pos && *pos && bytes && n > 0);
+
+	memcpy(*pos, bytes, n);
+	*pos += n;
+}
+
+static inline void
+write_str(char **pos, const char *str)
+{
+	size_t len;
+
+	assert_return(pos && *pos && !empty_str(str));
+
+	len = strlen(str);
+	write_varint(pos, len);
+	write_bytes(pos, str, len);
+}
+
+static inline void
+write_cmd(char **pos, const char *begin, const char *end)
+{
+	assert_return(pos && *pos && begin && end && end > begin);
+
+	write_varint(pos, end - begin);
+	write_bytes(pos, begin, end - begin);
+}
+
+static int
+idle_check_handshake_complete(struct uring_task *task, int res)
+{
+	size_t remain;
+	char *pos;
+	int32_t mclen;
+	int r;
+
+	assert_return(task, -EINVAL);
+	assert_task_alive_or(DBG_IDLE, task, return -EINTR);
+
+	remain = task->tbuf->len;
+	pos = task->tbuf->buf;
+
+	r = read_varint(&pos, &remain, &mclen);
+	if (r < 0) {
+		error("failed to parse message length");
+		return -EINVAL;
+	} else if (r == 0) {
+		return 0;
+	} else if (mclen < 2) {
+		error("short MC message");
+		return -EINVAL;
+	}
+
+	if (mclen < remain) {
+		debug(DBG_IDLE, "short MC message - len: %" PRIi32 ", remain: %zu",
+		      mclen, remain);
+		return 0;
+	} 
+
+	debug(DBG_IDLE, "Complete message");
+	return 1;
+}
+
+#define ONLINE_NEEDLE "\"online\""
+static int
+get_player_count(const char *pos, size_t remain)
+{
+	/*
+	 * Example JSON (line breaks added):
+	 * {"description":{
+	 *	"text":"A Minecraft Server"},
+	 *	"players":{"max":20,"online":0},
+	 *	"version":{"name":"1.15.2","protocol":578}
+	 * }
+	 */
+	char *online;
+	char *end;
+	unsigned count;
+
+	assert_return(pos && remain > 0, -1);
+
+	online = memmem(pos, remain, ONLINE_NEEDLE, strlen(ONLINE_NEEDLE));
+	if (!online) {
+		error("could not find online count in JSON");
+		return -1;
+	}
+
+	remain -= (online - pos);
+
+	end = memchr(online, '}', remain);
+	if (!end) {
+		error("could not parse JSON (no end)");
+		return -1;
+	}
+	*end = '\0';
+
+	if (sscanf(online, ONLINE_NEEDLE " : %u", &count) != 1) {
+		error("could not parse JSON (online count)");
+		return -1;
+	}
+
+	return count;
+}
+
+static void
+idle_check_handshake_reply(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, idle_task);
+	int32_t mclen;
+	int32_t jsonlen;
+	char *pos;
+	size_t remain;
+	int player_count = -1;
+	int r;
+
+	assert_return(task);
+	assert_task_alive(DBG_IDLE, task);
+
+	debug(DBG_IDLE, "res: %i", res);
+	if (res < 0)
+		goto out;
+
+	/*
+	fprintf(stderr, "Received MC message (%i bytes):", res);
+	for (int i = 0; i < res; i++)
+		fprintf(stderr, "0x%02hhx ", idle->remotebuf[i]);
+	fprintf(stderr, "n");
+	*/
+
+	remain = server->idle_buf.len;
+	pos = server->idle_buf.buf;
+
+	r = read_varint(&pos, &remain, &mclen);
+	if (r <= 0 || mclen < 2 || mclen < remain) {
+		/* Should not happen since the msg has been checked already */
+		error("invalid message");
+		goto out;
+	}
+
+	debug(DBG_IDLE, "MC message - len: %" PRIi32 ", remain: %zu",
+	      mclen, remain);
+
+	if (*pos != MC_STATUS_REPLY) {
+		error("unknown server reply (0x%02hhx)", *pos);
+		goto out;
+	}
+
+	pos++;
+	remain--;
+
+	r = read_varint(&pos, &remain, &jsonlen);
+	if (r <= 0) {
+		error("could not read JSON length");
+		goto out;
+	}
+
+	debug(DBG_IDLE, "MC - json len: %" PRIi32 ", remain: %zu",
+	      jsonlen, remain);
+
+	if (jsonlen < remain) {
+		error("invalid JSON length");
+		goto out;
+	}
+
+	/*
+	fprintf(stderr, "JSON: ");
+	for (int i = 0; i < jsonlen; i++)
+		fprintf(stderr, "%c", pos[i]);
+	*/
+
+	player_count = get_player_count(pos, remain);
+
+out:
+	uring_task_close_fd(task);
+	server_set_active_players(server, player_count);
+	return;
+}
+
+static void
+idle_check_handshake_sent(struct uring_task *task, int res)
+{
+	assert_return(task);
+	assert_task_alive(DBG_IDLE, task);
+
+	debug(DBG_IDLE, "sent %i bytes", res);
+	if (res < 0) {
+		uring_task_close_fd(task);
+		return;
+	}
+
+	uring_tbuf_read_until(task,
+			      idle_check_handshake_complete,
+			      idle_check_handshake_reply);
+}
+
+void
+idle_check_get_player_count(struct server *server, struct connection *conn)
+{
+	char buf[1024];
+	char *pos;
+	char *cmdbuf = server->idle_buf.buf;
+	uint16_t port;
+	char hostname[INET6_ADDRSTRLEN];
+
+	assert_return(server && conn && server->idle_task.priv);
+
+	port = saddr_port(&conn->remote);
+	saddr_addr(&conn->remote, hostname, sizeof(hostname));
+
+	pos = buf;
+	write_byte(&pos, MC_HELO);
+	write_varint(&pos, MC_UNDEFINED_VERSION);
+	write_str(&pos, hostname);
+	write_byte(&pos, (port >> 8) & 0xff);
+	write_byte(&pos, (port >> 0) & 0xff);
+	write_byte(&pos, MC_NEXT_STATE_STATUS);
+	write_cmd(&cmdbuf, buf, pos);
+
+	pos = buf;
+	write_byte(&pos, MC_GET_STATUS);
+	write_cmd(&cmdbuf, buf, pos);
+
+	server->idle_buf.len = (cmdbuf - server->idle_buf.buf);
+	debug(DBG_IDLE, "sending MC message (%zu bytes)", server->idle_buf.len);
+
+	uring_tbuf_write(&server->idle_task, idle_check_handshake_sent);
+}
+
+static void
+idle_cb(struct ptimer_task *ptask)
+{
+	struct idle *idle = container_of(ptask, struct idle, ptask);
+	struct server *server;
+
+	assert_return(ptask);
+	assert_task_alive(DBG_IDLE, &idle->task);
+
+	debug(DBG_IDLE, "timer fired");
+
+	list_for_each_entry(server, &cfg->servers, list)
+		server_idle_check(server);
+}
+
+static void
+idle_free(struct uring_task *task)
+{
+	struct idle *idle = container_of(task, struct idle, task);
+
+	assert_return(task);
+	debug(DBG_IDLE, "task %p, idle %p", task, idle);
+	xfree(idle);
+}
+
+void
+idle_refdump()
+{
+	assert_return_silent(cfg->idle);
+
+	uring_task_refdump(&cfg->idle->task);
+}
+
+void
+idle_delete()
+{
+	assert_return(cfg->idle);
+
+	debug(DBG_IDLE, "closing fd %i", cfg->idle->task.fd);
+	ptimer_del_task(&cfg->idle->ptask);
+	uring_task_destroy(&cfg->idle->task);
+	cfg->idle = NULL;
+}
+
+void
+idle_init()
+{
+	struct idle *idle;
+
+	assert_return(!cfg->idle);
+
+	idle = zmalloc(sizeof(*idle));
+	if (!idle)
+		die("malloc: %m");
+
+	ptask_init(&idle->ptask, 60, 0, idle_cb);
+	uring_task_init(&idle->task, "idle", uring_parent(), idle_free);
+	ptimer_add_task(&idle->ptask);
+	cfg->idle = idle;
+}
+
diff --git a/mcserverproxy/idle.h b/mcserverproxy/idle.h
new file mode 100644
index 0000000..d7e4ab0
--- /dev/null
+++ b/mcserverproxy/idle.h
@@ -0,0 +1,13 @@
+#ifndef fooidlehfoo
+#define fooidlehfoo
+
+void idle_check_get_player_count(struct server *server,
+				 struct connection *conn);
+
+void idle_refdump();
+
+void idle_delete();
+
+void idle_init();
+
+#endif
diff --git a/mcserverproxy/igmp.c b/mcserverproxy/igmp.c
new file mode 100644
index 0000000..dc43a9f
--- /dev/null
+++ b/mcserverproxy/igmp.c
@@ -0,0 +1,587 @@
+#include <unistd.h>
+#include <string.h>
+#include <stdint.h>
+#include <sys/socket.h>
+#include <linux/if_packet.h>
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <netinet/ip.h>
+#include <linux/bpf.h>
+#include <linux/filter.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+
+#include "main.h"
+#include "uring.h"
+#include "igmp.h"
+#include "announce.h"
+
+struct igmp {
+	struct uring_task task;
+	struct uring_task_buf tbuf;
+};
+
+#define ETH_HDR_LEN		14
+#define IPV4_MIN_HDR_LEN	20
+#define IGMP_MIN_LEN		8
+
+struct __attribute__((packed, scalar_storage_order("big-endian"))) ipv4_hdr {
+	unsigned version:4;
+	unsigned ihl:4;
+	unsigned dscp:6;
+	unsigned ecn:2;
+	unsigned length:16;
+	unsigned id:16;
+	unsigned flags:3;
+	unsigned fragment_offset:13;
+	unsigned ttl:8;
+	unsigned protocol:8;
+	unsigned checksum:16;
+	unsigned src:32;
+	unsigned dst:32;
+	unsigned options[];
+};
+
+enum igmp_type {
+	IGMP_MEMBERSHIP_QUERY		= 0x11,
+	IGMP_V1_MEMBERSHIP_REPORT	= 0x12,
+	IGMP_V2_MEMBERSHIP_REPORT	= 0x16,
+	IGMP_V3_MEMBERSHIP_REPORT	= 0x22,
+	IGMP_V2_LEAVE_GROUP		= 0x17
+};
+
+union igmp_msg {
+	struct __attribute__((packed, scalar_storage_order("big-endian"))) {
+		enum igmp_type type:8;
+		unsigned unknown:8;
+		unsigned checksum:16;
+	} common;
+
+	struct __attribute__((packed, scalar_storage_order("big-endian"))) {
+		enum igmp_type type:8;
+		unsigned resptime:8;
+		unsigned checksum:16;
+		unsigned addr:32;
+	} v2;
+
+	struct __attribute__((packed, scalar_storage_order("big-endian"))) {
+		enum igmp_type type:8;
+		unsigned reserved1:8;
+		unsigned checksum:16;
+		unsigned reserved2:16;
+		unsigned nrecs:16;
+		uint8_t records[];
+	} v3;
+};
+
+enum igmp_v3_record_type {
+	IGMP_V3_REC_MODE_IS_INCL	= 1,
+	IGMP_V3_REC_MODE_IS_EXCL	= 2,
+	IGMP_V3_REC_MODE_CH_INCL	= 3,
+	IGMP_V3_REC_MODE_CH_EXCL	= 4
+};
+
+union igmp_v3_record {
+	struct __attribute__((packed, scalar_storage_order("big-endian"))) {
+		enum igmp_v3_record_type type:8;
+		unsigned auxlen:8;
+		unsigned nsrcs:16;
+		unsigned addr:32;
+		uint32_t saddr[];
+	};
+};
+
+static inline unsigned short
+from32to16(unsigned int x)
+{
+	/* add up 16-bit and 16-bit for 16+c bit */
+	x = (x & 0xffff) + (x >> 16);
+	/* add up carry.. */
+	x = (x & 0xffff) + (x >> 16);
+	return x;
+}
+
+static unsigned int
+do_csum(const unsigned char *buf, int len)
+{
+	int odd;
+	unsigned int result = 0;
+
+	assert_return(buf && len > 0, 0);
+
+	odd = 1 & (unsigned long)buf;
+	if (odd) {
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+		result += (*buf << 8);
+#else
+		result = *buf;
+#endif
+		len--;
+		buf++;
+	}
+
+	if (len >= 2) {
+		if (2 & (unsigned long)buf) {
+			result += *(unsigned short *)buf;
+			len -= 2;
+			buf += 2;
+		}
+		if (len >= 4) {
+			const unsigned char *end = buf + ((unsigned)len & ~3);
+			unsigned int carry = 0;
+			do {
+				unsigned int w = *(unsigned int *)buf;
+				buf += 4;
+				result += carry;
+				result += w;
+				carry = (w > result);
+			} while (buf < end);
+			result += carry;
+			result = (result & 0xffff) + (result >> 16);
+		}
+		if (len & 2) {
+			result += *(unsigned short *)buf;
+			buf += 2;
+		}
+	}
+
+	if (len & 1)
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+		result += *buf;
+#else
+		result += (*buf << 8);
+#endif
+
+	result = from32to16(result);
+	if (odd)
+		result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
+
+	return result;
+}
+
+static inline bool
+csum_valid(const char *buf, size_t len)
+{
+	assert_return(buf && len > 0, false);
+
+	return do_csum((unsigned const char *)buf, len) == 0xffff;
+}
+
+static void
+igmp_match()
+{
+	debug(DBG_IGMP, "multicast request discovered");
+	/*
+	 * IGMP messages are sent with approx 120-130 sec intervals,
+	 * so set time to 5 minutes to allow some slack.
+	 */
+	announce_start(5 * 60);
+}
+
+static void
+igmp_parse(struct igmp *igmp)
+{
+	char *buf;
+	size_t len;
+	struct ipv4_hdr *hdr;
+	size_t body_len;
+	union igmp_msg *igmp_msg;
+
+	assert_return(igmp);
+
+	buf = igmp->task.tbuf->buf;
+	len = igmp->task.tbuf->len;
+	hdr = (struct ipv4_hdr *)buf;
+
+	if (len <= IPV4_MIN_HDR_LEN)
+		return;
+
+	if (hdr->version != 4)
+		return;
+
+	if (hdr->ihl * 4 < IPV4_MIN_HDR_LEN)
+		return;
+
+	if (hdr->length < hdr->ihl * 4)
+		return;
+
+	if (hdr->length != len)
+		return;
+
+	if (hdr->fragment_offset > 0)
+		return;
+
+	if (hdr->protocol != IPPROTO_IGMP)
+		return;
+
+	if (!csum_valid(buf, hdr->ihl * 4))
+		return;
+
+	body_len = hdr->length - hdr->ihl * 4;
+	igmp_msg = (union igmp_msg *)(buf + hdr->ihl * 4);
+
+	if (body_len < IGMP_MIN_LEN)
+		return;
+
+	switch (igmp_msg->common.type) {
+	case IGMP_V1_MEMBERSHIP_REPORT:
+		debug(DBG_IGMP, "igmp_v1_membership_report");
+		/* fall through */
+
+	case IGMP_V2_MEMBERSHIP_REPORT: {
+		struct in_addr src;
+		char src_str[INET_ADDRSTRLEN];
+		struct in_addr dst;
+		char dst_str[INET_ADDRSTRLEN];
+		struct in_addr grp;
+		char grp_str[INET_ADDRSTRLEN];
+
+		src.s_addr = htonl(hdr->src);
+		inet_ntop(AF_INET, &src, src_str, sizeof(src_str));
+		dst.s_addr = htonl(hdr->dst);
+		inet_ntop(AF_INET, &dst, dst_str, sizeof(dst_str));
+		grp.s_addr = htonl(igmp_msg->v2.addr);
+		inet_ntop(AF_INET, &grp, grp_str, sizeof(grp_str));
+
+		debug(DBG_IGMP, "igmp_v2_membership_report %s -> %s (%s)",
+		      src_str, dst_str, grp_str);
+
+		if (body_len != IGMP_MIN_LEN) {
+			error("IGMPv2 invalid size");
+			break;
+		}
+
+		if (!csum_valid((char *)igmp_msg, body_len)) {
+			error("IGMPv2 invalid checksum");
+			break;
+		}
+
+		debug(DBG_IGMP, "Inet addr: 0x%x", inet_addr("224.0.2.60"));
+		debug(DBG_IGMP, "Inet addr: 0x%x", cinet_addr(224,0,2,60));
+		debug(DBG_IGMP, "Inet addr: 0x%x", chtobe32(cinet_addr(224,0,2,60)));
+		if (htonl(hdr->dst) != cinet_addr(224,0,2,60)) {
+			debug(DBG_IGMP, "IGMPv2 invalid dst addr");
+			break;
+		}
+
+		if (htonl(igmp_msg->v2.addr) != cinet_addr(224,0,2,60)) {
+			debug(DBG_IGMP, "IGMPv2 invalid grp addr");
+			break;
+		}
+
+		igmp_match();
+		break;
+	}
+
+	case IGMP_V3_MEMBERSHIP_REPORT: {
+		char *pos = (char *)igmp_msg;
+		struct in_addr src;
+		char src_str[INET_ADDRSTRLEN];
+		struct in_addr dst;
+		char dst_str[INET_ADDRSTRLEN];
+
+		src.s_addr = htonl(hdr->src);
+		inet_ntop(AF_INET, &src, src_str, sizeof(src_str));
+		dst.s_addr = htonl(hdr->dst);
+		inet_ntop(AF_INET, &dst, dst_str, sizeof(dst_str));
+
+		debug(DBG_IGMP, "igmp_v3_membership_report %s -> %s",
+		      src_str, dst_str);
+
+		debug(DBG_IGMP, "IGMPv3"
+		      " type: %x,"
+		      " reserved: %u,"
+		      " csum: %u,"
+		      " reserved: %u,"
+		      " nrecs: %u,"
+		      " size: %zu\n",
+		      igmp_msg->v3.type,
+		      igmp_msg->v3.reserved1,
+		      igmp_msg->v3.checksum,
+		      igmp_msg->v3.reserved2,
+		      igmp_msg->v3.nrecs,
+		      sizeof(igmp_msg->v3));
+
+		if (!csum_valid(pos, body_len)) {
+			error("IGMPv3 csum invalid");
+			break;
+		}
+
+		if (htonl(hdr->dst) != cinet_addr(224,0,0,22)) {
+			debug(DBG_IGMP, "IGMPv2 invalid dst addr");
+			break;
+		}
+
+		body_len -= sizeof(igmp_msg->v3);
+		pos += sizeof(igmp_msg->v3);
+
+		for (unsigned rec = 0; rec < igmp_msg->v3.nrecs; rec++) {
+			union igmp_v3_record *record = (union igmp_v3_record *)pos;
+			struct in_addr grp;
+			char grp_str[INET_ADDRSTRLEN];
+
+			if (body_len < sizeof(*record)) {
+				error("IGMPv3 too short");
+				break;
+			}
+
+			grp.s_addr = htonl(record->addr);
+			inet_ntop(AF_INET, &grp, grp_str, sizeof(grp_str));
+			debug(DBG_IGMP, "received IGMPv3 record to %s", grp_str);
+
+			debug(DBG_IGMP, "IGMPv3 rec, "
+			      " type: %u,"
+			      " auxlen: %u,"
+			      " nsrcs: %u,"
+			      " addr: %s,"
+			      " size: %zu bytes",
+			      record->type,
+			      record->auxlen,
+			      record->nsrcs,
+			      grp_str,
+			      sizeof(*record));
+
+			body_len -= sizeof(*record);
+			pos += sizeof(*record);
+
+			if (body_len < record->nsrcs * sizeof(uint32_t) + record->auxlen) {
+				error("IGMPv3 too short");
+				break;
+			}
+
+			for (unsigned addr = 0; addr < record->nsrcs; addr++) {
+				struct in_addr grp_src;
+				char grp_src_str[INET_ADDRSTRLEN];
+
+				grp_src.s_addr = htonl(record->saddr[addr]);
+				inet_ntop(AF_INET, &grp_src, grp_src_str, sizeof(grp_src_str));
+				debug(DBG_IGMP, "received IGMPv3 record src %s",
+				      grp_src_str);
+
+				body_len -= sizeof(record->saddr[addr]);
+				pos += sizeof(record->saddr[addr]);
+			}
+
+			/* Yes, EXCL, not INCL, see RFC3376 */
+			if ((htonl(record->addr) == cinet_addr(224,0,2,60)) &&
+			    ((record->type == IGMP_V3_REC_MODE_IS_EXCL) ||
+			     (record->type == IGMP_V3_REC_MODE_CH_EXCL)))
+				igmp_match();
+
+			body_len -= record->auxlen;
+			pos += record->auxlen;
+		}
+
+		break;
+	}
+
+	case IGMP_MEMBERSHIP_QUERY:
+		debug(DBG_IGMP, "igmp_membership_query");
+		break;
+
+	case IGMP_V2_LEAVE_GROUP:
+		debug(DBG_IGMP, "igmp_v2_leave_group");
+		break;
+
+	default:
+		debug(DBG_IGMP, "IGMP msg type %02hhx", igmp_msg->common.type);
+		break;
+	}
+
+	buf += hdr->length;
+	len -= hdr->length;
+}
+
+static void
+igmp_read_cb(struct uring_task *task, int res)
+{
+	struct igmp *igmp = container_of(task, struct igmp, task);
+
+	assert_return(task);
+	assert_task_alive(DBG_IGMP, task);
+
+	debug(DBG_IGMP, "task %p, igmp %p, res %i", task, igmp, res);
+	if (res < 0) {
+		error("res: %i", res);
+		return;
+	}
+
+	task->tbuf->len = res;
+
+	if (task->saddr.storage.ss_family == AF_PACKET ||
+	    task->saddr.ll.sll_protocol == htons(ETH_P_IP))
+		igmp_parse(igmp);
+	else
+		debug(DBG_IGMP, "invalid packet type received");
+
+	uring_tbuf_read(&igmp->task, igmp_read_cb);
+}
+
+static void
+igmp_free(struct uring_task *task)
+{
+	struct igmp *igmp = container_of(task, struct igmp, task);
+
+	assert_return(task);
+	debug(DBG_IGMP, "task %p, igmp %p", task, igmp);
+	xfree(igmp);
+}
+
+void
+igmp_refdump()
+{
+	assert_return_silent(cfg->igmp);
+
+	uring_task_refdump(&cfg->igmp->task);
+}
+
+void
+igmp_delete()
+{
+	assert_return_silent(cfg->igmp);
+
+	debug(DBG_IGMP, "closing fd %i", cfg->igmp->task.fd);
+	uring_task_destroy(&cfg->igmp->task);
+	cfg->igmp = NULL;
+}
+
+void
+igmp_init()
+{
+	static const struct sock_filter filter[] = {
+		BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0),					/* A <- packet length */
+		BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, sizeof(struct iphdr), 1, 0),	/* A < sizeof(iphdr) */
+                BPF_STMT(BPF_RET + BPF_K, 0),						/* drop packet */
+
+		BPF_STMT(BPF_LD + BPF_B + BPF_ABS, 0 /* iphdr[0] */),			/* A <- version + ihl */
+		BPF_STMT(BPF_ALU + BPF_RSH + BPF_K, 4),					/* A <- A >> 4 (version) */
+                BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x04, 1, 0),			/* A != 4 */
+                BPF_STMT(BPF_RET + BPF_K, 0),						/* drop packet */
+
+		BPF_STMT(BPF_LD + BPF_B + BPF_ABS, offsetof(struct iphdr, protocol)),	/* A <- ip protocol */
+                BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, IPPROTO_IGMP, 1, 0),		/* A != IPPROTO_IGMP */
+                BPF_STMT(BPF_RET + BPF_K, 0),						/* drop packet */
+
+		BPF_STMT(BPF_LD + BPF_W + BPF_ABS, offsetof(struct iphdr, daddr)),	/* A <- ip dst addr */
+                BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, chtobe32(cinet_addr(224,0,2,60)), 2, 0),	/* A != 224.0.2.60 */
+                //BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0xe000023c, 2, 0),			/* A != 224.0.2.60 */
+                BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, chtobe32(cinet_addr(224,0,0,22)), 1, 0),	/* A != 224.0.0.22 */
+                //BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0xe0000016, 1, 0),			/* A != 224.0.0.22 */
+                BPF_STMT(BPF_RET + BPF_K, 0),						/* drop packet */
+
+		BPF_STMT(BPF_LDX + BPF_B + BPF_MSH, 0 /* iphdr[0] */),			/* X <- pkt->ihl * 4 */
+		BPF_STMT(BPF_LD + BPF_IMM, 20),						/* A <- 20 */
+		BPF_JUMP(BPF_JMP + BPF_JGT + BPF_X, 0, 0, 1),				/* A > X */
+                BPF_STMT(BPF_RET + BPF_K, 0),						/* drop packet */
+
+		BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct iphdr, tot_len)),	/* A <- ip tot_len */
+		BPF_JUMP(BPF_JMP + BPF_JGT + BPF_X, 0, 1, 0),				/* A <= ip->ihl * 4 */ 
+                BPF_STMT(BPF_RET + BPF_K, 0),						/* drop packet */
+		BPF_STMT(BPF_ALU + BPF_SUB + BPF_X, 0),					/* A <- A - X (bodylen) */
+		BPF_JUMP(BPF_JMP + BPF_JGE + BPF_K, 8, 1, 0),				/* A < 8 */
+                BPF_STMT(BPF_RET + BPF_K, 0),						/* drop packet */
+
+		BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(struct iphdr, tot_len)),	/* A <- ip->tot_len */
+		BPF_STMT(BPF_MISC + BPF_TAX, 0),					/* X <- A */
+		BPF_STMT(BPF_LD + BPF_W + BPF_LEN, 0),					/* A <- packet length */
+		BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_X, 0, 1, 0),				/* A != ip->tot_len */
+                BPF_STMT(BPF_RET + BPF_K, 0),						/* drop packet */
+
+                BPF_STMT(BPF_RET + BPF_K, (uint32_t) -1),				/* accept packet */
+        };
+        static const struct sock_fprog fprog = {
+                .len = ARRAY_SIZE(filter),
+                .filter = (struct sock_filter*) filter,
+        };
+	struct sockaddr_ll addr = {
+		.sll_family = AF_PACKET,
+		.sll_ifindex = 0,
+		.sll_pkttype = PACKET_MULTICAST,
+	};
+	struct igmp *igmp;
+	int sfd;
+	int opt;
+
+	if (!cfg->do_igmp) {
+		debug(DBG_IGMP, "igmp snooping disabled");
+		return;
+	}
+
+	assert_return(!cfg->igmp);
+
+	igmp = zmalloc(sizeof(*igmp));
+	if (!igmp)
+		return;
+
+	/*
+	 * Kernel limitation, must be ETH_P_ALL, not ETH_P_IP or we won't get
+	 * outgoing packets, https://lkml.org/lkml/1999/12/23/112
+	 */
+	sfd = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC, htons(ETH_P_ALL));
+	if (sfd < 0) {
+		if (errno == EACCES || errno == EPERM)
+			info("Unable to do IGMP snooping, permission denied");
+		else
+			error("socket: %m");
+		goto error;
+	}
+
+	if (setsockopt(sfd, SOL_SOCKET, SO_ATTACH_FILTER, &fprog, sizeof(fprog)) < 0) {
+		error("setsockopt(SO_ATTACH_FILTER): %m");
+		goto error;
+	}
+
+	if (setsockopt(sfd, SOL_SOCKET, SO_LOCK_FILTER, &opt, sizeof(opt)) < 0) {
+		error("setsockopt(SO_LOCK_FILTER): %m");
+		goto error;
+	}
+
+	if (cfg->igmp_iface) {
+		struct ifreq ifreq;
+		int r;
+
+		r = snprintf(ifreq.ifr_name, sizeof(ifreq.ifr_name),
+			     "%s", cfg->igmp_iface);
+		if (r < 0 || r >= sizeof(ifreq.ifr_name))
+			die("invalid interface name: %s", cfg->igmp_iface);
+
+		if (ioctl(sfd, SIOCGIFINDEX, &ifreq) < 0)
+			die("ioctl: %m");
+
+		debug(DBG_IGMP, "using interface %s (%i)",
+		      cfg->igmp_iface, ifreq.ifr_ifindex);
+
+		struct packet_mreq mreq = {
+			.mr_ifindex = ifreq.ifr_ifindex,
+			.mr_type = PACKET_MR_ALLMULTI
+		};
+
+		if (setsockopt(sfd, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
+			       &mreq, sizeof(mreq)) < 0) {
+			error("setsockopt(PACKET_ADD_MEMBERSHIP): %m");
+			goto error;
+		}
+	}
+
+	/* can't set .sll_protocol to htons(ETH_P_IP), see comment above */
+	if (bind(sfd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+		error("bind: %m");
+		goto error;
+	}
+
+	debug(DBG_IGMP, "init successful, using fd %i", sfd);
+	uring_task_init(&igmp->task, "igmp", uring_parent(), igmp_free);
+	uring_task_set_fd(&igmp->task, sfd);
+	uring_task_set_buf(&igmp->task, &igmp->tbuf);
+	igmp->task.saddr.addrlen = sizeof(igmp->task.saddr.ll);
+	uring_tbuf_recvmsg(&igmp->task, igmp_read_cb);
+	
+	cfg->igmp = igmp;
+
+	return;
+
+error:
+	close(sfd);
+	xfree(igmp);
+}
diff --git a/mcserverproxy/igmp.h b/mcserverproxy/igmp.h
new file mode 100644
index 0000000..80875b0
--- /dev/null
+++ b/mcserverproxy/igmp.h
@@ -0,0 +1,10 @@
+#ifndef fooigmphfoo
+#define fooigmphfoo
+
+void igmp_refdump();
+
+void igmp_delete();
+
+void igmp_init();
+
+#endif
diff --git a/mcserverproxy/main.c b/mcserverproxy/main.c
new file mode 100644
index 0000000..047e70e
--- /dev/null
+++ b/mcserverproxy/main.c
@@ -0,0 +1,740 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <getopt.h>
+#include <systemd/sd-daemon.h>
+#include <cap-ng.h>
+#include <pwd.h>
+#include <grp.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#include "main.h"
+#include "signal-handler.h"
+#include "uring.h"
+#include "config-parser.h"
+#include "server.h"
+#include "server-config.h"
+#include "announce.h"
+#include "systemd.h"
+#include "igmp.h"
+#include "idle.h"
+#include "ptimer.h"
+#include <config.h>
+
+/* Global */
+struct cfg *cfg = NULL;
+bool exiting = false;
+unsigned debug_mask = DBG_ERROR | DBG_INFO;
+
+/* Local */
+static bool daemonize = false;
+static FILE *log_file = NULL;
+static const char *log_file_path = NULL;
+
+#define ANSI_RED	"\x1B[0;31m"
+#define ANSI_GREEN	"\x1B[0;32m"
+#define ANSI_YELLOW	"\x1B[0;33m"
+#define ANSI_BLUE	"\x1B[0;34m"
+#define ANSI_MAGENTA	"\x1B[0;35m"
+#define ANSI_GREY	"\x1B[0;38;5;245m"
+#define ANSI_NORMAL	"\x1B[0m"
+
+static void
+msg(enum debug_lvl lvl, const char *fmt, va_list ap)
+{
+	static bool first = true;
+	static bool use_colors = false;
+	static bool sd_daemon = false;
+	const char *color;
+	const char *sd_lvl;
+
+	assert_return(lvl != 0 && !empty_str(fmt) && ap);
+
+	while (first) {
+		int fd;
+		const char *e;
+
+		first = false;
+
+		/* assume we're not launched by systemd when daemonized */
+		if (daemonize) {
+			sd_daemon = false;
+			use_colors = false;
+			break;
+		}
+
+		if (log_file) {
+			sd_daemon = false;
+			use_colors = false;
+			break;
+		}
+
+		if (getenv("NO_COLOR")) {
+			sd_daemon = false;
+			use_colors = false;
+			break;
+		}
+
+		fd = fileno(stderr);
+		if (fd < 0) {
+			/* Umm... */
+			sd_daemon = true;
+			use_colors = false;
+			break;
+		}
+
+		if (!isatty(fd)) {
+			sd_daemon = true;
+			use_colors = false;
+			break;
+		}
+
+		/* systemd wouldn't normally set TERM */
+		e = getenv("TERM");
+		if (!e) {
+			sd_daemon = true;
+			use_colors = false;
+			break;
+		}
+
+		if (streq(e, "dumb")) {
+			sd_daemon = false;
+			use_colors = false;
+			break;
+		}
+
+		sd_daemon = false;
+		use_colors = true;
+	}
+
+	switch (lvl) {
+	case DBG_ERROR:
+		sd_lvl = SD_ERR;
+		color = use_colors ? ANSI_RED : NULL;
+		break;
+	case DBG_VERBOSE:
+		sd_lvl = SD_INFO;
+		color = NULL;
+		break;
+	case DBG_INFO:
+		sd_lvl = SD_NOTICE;
+		color = NULL;
+		break;
+	default:
+		sd_lvl = SD_DEBUG;
+		color = use_colors ? ANSI_GREY : NULL;
+		break;
+	}
+
+	if (sd_daemon)
+		fprintf(stderr, sd_lvl);
+	else if (color)
+		fprintf(stderr, color);
+
+	vfprintf(log_file ? log_file : stderr, fmt, ap);
+
+	if (color)
+		fprintf(stderr, ANSI_NORMAL);
+}
+
+void
+__debug(enum debug_lvl lvl, const char *fmt, ...)
+{
+	va_list ap;
+
+	assert_return(lvl != 0 && !empty_str(fmt));
+
+	va_start(ap, fmt);
+	msg(lvl, fmt, ap);
+	va_end(ap);
+}
+
+__attribute__((noreturn)) void
+__die(const char *fmt, ...)
+{
+	va_list ap;
+
+	if (!empty_str(fmt)) {
+		va_start(ap, fmt);
+		msg(DBG_ERROR, fmt, ap);
+		va_end(ap);
+	} else
+		error("fmt not set");
+
+	sd_notifyf(0, "STATUS=Error, shutting down");
+	exit(EXIT_FAILURE);
+};
+
+static void
+cfg_free(struct uring_task *task)
+{
+	struct cfg *xcfg = container_of(task, struct cfg, task);
+
+	assert_return(task && xcfg == cfg);
+
+	debug(DBG_SIG, "called");
+	systemd_delete(cfg);
+	xfree(cfg->igmp_iface);
+	cfg->igmp_iface = NULL;
+	exiting = true;
+	/* The cfg struct is free:d in main() */
+}
+
+enum mcfg_keys {
+	MCFG_KEY_INVALID = 0,
+	MCFG_KEY_IGMP,
+	MCFG_KEY_IGMP_IFACE,
+	MCFG_KEY_ANN_INTERVAL,
+	MCFG_KEY_PROXY_CONN_INTERVAL,
+	MCFG_KEY_PROXY_CONN_ATTEMPTS,
+	MCFG_KEY_SOCKET_DEFER,
+	MCFG_KEY_SOCKET_FREEBIND,
+	MCFG_KEY_SOCKET_KEEPALIVE,
+	MCFG_KEY_SOCKET_IPTOS,
+	MCFG_KEY_SOCKET_NODELAY,
+};
+
+struct cfg_key_value_map mcfg_key_map[] = {
+	{
+		.key_name = "igmp",
+		.key_value = MCFG_KEY_IGMP,
+		.value_type = CFG_VAL_TYPE_BOOL,
+	}, {
+		.key_name = "igmp_iface",
+		.key_value = MCFG_KEY_IGMP_IFACE,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = "announce_interval",
+		.key_value = MCFG_KEY_ANN_INTERVAL,
+		.value_type = CFG_VAL_TYPE_UINT16,
+	}, {
+		.key_name = "proxy_connection_interval",
+		.key_value = MCFG_KEY_PROXY_CONN_INTERVAL,
+		.value_type = CFG_VAL_TYPE_UINT16,
+	}, {
+		.key_name = "proxy_connection_attempts",
+		.key_value = MCFG_KEY_PROXY_CONN_ATTEMPTS,
+		.value_type = CFG_VAL_TYPE_UINT16,
+	}, {
+		.key_name = "socket_defer",
+		.key_value = MCFG_KEY_SOCKET_DEFER,
+		.value_type = CFG_VAL_TYPE_BOOL,
+	}, {
+		.key_name = "socket_freebind",
+		.key_value = MCFG_KEY_SOCKET_FREEBIND,
+		.value_type = CFG_VAL_TYPE_BOOL,
+	}, {
+		.key_name = "socket_keepalive",
+		.key_value = MCFG_KEY_SOCKET_KEEPALIVE,
+		.value_type = CFG_VAL_TYPE_BOOL,
+	}, {
+		.key_name = "socket_iptos",
+		.key_value = MCFG_KEY_SOCKET_IPTOS,
+		.value_type = CFG_VAL_TYPE_BOOL,
+	}, {
+		.key_name = "socket_nodelay",
+		.key_value = MCFG_KEY_SOCKET_NODELAY,
+		.value_type = CFG_VAL_TYPE_BOOL,
+	}, {
+		.key_name = NULL,
+		.key_value = MCFG_KEY_INVALID,
+		.value_type = CFG_VAL_TYPE_INVALID,
+	}
+};
+
+static void
+cfg_read()
+{
+	FILE *cfgfile;
+	const char *path;
+	char buf[4096];
+	char *pos = buf;
+	size_t rd = 0;
+	size_t r;
+
+	assert_return(cfg);
+
+	if (cfg->cfg_file)
+		path = cfg->cfg_file;
+	else
+		path = DEFAULT_MAIN_CFG_FILE;
+
+	cfgfile = fopen(path, "re");
+	if (!cfgfile) {
+		/* ENOENT is only an error with an explicitly set path */
+		if (errno == ENOENT && !cfg->cfg_file)
+			return;
+		else if (errno == ENOENT)
+			die("main config file (%s) missing", path);
+		else
+			die("fopen(%s): %m", path);
+	}
+
+	debug(DBG_CFG, "opened main config file (%s)", path);
+
+	while (rd < sizeof(buf)) {
+		r = fread(pos, 1, sizeof(buf) - rd - 1, cfgfile);
+		if (r == 0)
+			break;
+		rd += r;
+		pos += r;
+	}
+
+	if (rd == 0)
+		die("main config file (%s) zero size", path);
+
+	if (rd >= sizeof(buf))
+		die("main config file (%s) too large", path);
+
+	fclose(cfgfile);
+	*pos = '\0';
+	pos = buf;
+
+	if (!config_parse_header(path, "mcproxy", &pos))
+		die("main config file (%s) invalid", path);
+
+	while (true) {
+		int key;
+		const char *keyname;
+		struct cfg_value value;
+
+		if (!config_parse_line(path, &pos, mcfg_key_map,
+				       &key, &keyname, &value))
+			break;
+
+		if (key == MCFG_KEY_INVALID)
+			die("main config file (%s) invalid", path);
+
+		debug(DBG_CFG, "main cfg: key %s", keyname);
+
+		switch (key) {
+
+		case MCFG_KEY_IGMP:
+			cfg->do_igmp = value.boolean;
+			break;
+
+		case MCFG_KEY_IGMP_IFACE:
+			cfg->igmp_iface = xstrdup(value.str);
+			if (!cfg->igmp_iface)
+				die("xstrdup: %m");
+
+			break;
+
+		case MCFG_KEY_ANN_INTERVAL:
+			cfg->announce_interval = value.uint16;
+			break;
+
+		case MCFG_KEY_PROXY_CONN_INTERVAL:
+			cfg->proxy_connection_interval = value.uint16;
+			break;
+
+		case MCFG_KEY_PROXY_CONN_ATTEMPTS:
+			cfg->proxy_connection_attempts = value.uint16;
+			break;
+
+		case MCFG_KEY_SOCKET_DEFER:
+			cfg->socket_defer = value.boolean;
+			break;
+
+		case MCFG_KEY_SOCKET_FREEBIND:
+			cfg->socket_freebind = value.boolean;
+			break;
+
+		case MCFG_KEY_SOCKET_KEEPALIVE:
+			cfg->socket_keepalive = value.boolean;
+			break;
+
+		case MCFG_KEY_SOCKET_IPTOS:
+			cfg->socket_iptos = value.boolean;
+			break;
+
+		case MCFG_KEY_SOCKET_NODELAY:
+			cfg->socket_nodelay = value.boolean;
+			break;
+
+		case MCFG_KEY_INVALID:
+		default:
+			die("main config file (%s) invalid", path);
+		}
+	}
+}
+
+const struct {
+	const char *name;
+	unsigned val;
+} debug_category_str[] = {
+	{
+		.name = "config",
+		.val = DBG_CFG,
+	},{
+		.name = "refcount",
+		.val = DBG_REF,
+	},{
+		.name = "malloc",
+		.val = DBG_MALLOC,
+	},{
+		.name = "announce",
+		.val = DBG_ANN,
+	},{
+		.name = "signal",
+		.val = DBG_SIG,
+	},{
+		.name = "uring",
+		.val = DBG_UR,
+	},{
+		.name = "server",
+		.val = DBG_SRV,
+	},{
+		.name = "proxy",
+		.val = DBG_PROXY,
+	},{
+		.name = "rcon",
+		.val = DBG_RCON,
+	},{
+		.name = "idle",
+		.val = DBG_IDLE,
+	},{
+		.name = "igmp",
+		.val = DBG_IGMP,
+	},{
+		.name = "systemd",
+		.val = DBG_SYSD,
+	},{
+		.name = "dns",
+		.val = DBG_DNS,
+	},{
+		.name = "timer",
+		.val = DBG_TIMER,
+	},{
+		.name = NULL,
+		.val = 0,
+	}
+};
+
+__attribute__((noreturn)) static void
+usage(int argc, char **argv, bool invalid)
+{
+	if (invalid)
+		info("Invalid option(s)");
+
+	info("Usage: %s [OPTIONS]\n"
+	     "\n"
+	     "Valid options:\n"
+	     "  -c, --cfgdir=DIR\tlook for configuration files in DIR\n"
+	     "  -u, --user=USER\trun as USER\n"
+	     "  -D, --daemonize\trun in daemon mode (disables stderr output)\n"
+	     "  -l, --logfile=FILE\tlog to FILE instead of stderr\n"
+	     "  -h, --help\t\tprint this information\n"
+	     "  -v, --verbose\t\tenable verbose logging\n"
+	     "  -d, --debug=CATEGORY\tenable debugging for CATEGORY\n"
+	     "\t\t\t(use \"list\" to see available categories,\n"
+	     "\t\t\t or \"all\" to enable all categories)\n",
+	     argv ? argv[0] : "mcproxy");
+
+	exit(invalid ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+static void
+cfg_init(int argc, char **argv)
+{
+	int c;
+	unsigned i;
+
+	assert_die(argc > 0 && argv, "invalid arguments");
+
+	cfg = zmalloc(sizeof(*cfg));
+	if (!cfg)
+		die("malloc: %m");
+
+	uring_task_init(&cfg->task, "main", NULL, cfg_free);
+	list_init(&cfg->servers);
+
+	cfg->cfg_dir = DEFAULT_CFG_DIR;
+	cfg->announce_interval = DEFAULT_ANNOUNCE_INTERVAL;
+	cfg->proxy_connection_interval = DEFAULT_PROXY_CONN_INTERVAL;
+	cfg->proxy_connection_attempts = DEFAULT_PROXY_CONN_ATTEMPTS;
+	cfg->socket_defer = DEFAULT_SOCKET_DEFER;
+	cfg->socket_freebind = DEFAULT_SOCKET_FREEBIND;
+	cfg->socket_keepalive = DEFAULT_SOCKET_KEEPALIVE;
+	cfg->socket_iptos = DEFAULT_SOCKET_IPTOS;
+	cfg->socket_nodelay = DEFAULT_SOCKET_NODELAY;
+	cfg->uid = geteuid();
+	cfg->gid = getegid();
+
+	while (true) {
+		int option_index = 0;
+		static struct option long_options[] = {
+			{ "cfgdir",	required_argument,	0, 'c' },
+			{ "cfgfile",	required_argument,	0, 'C' },
+			{ "user",	required_argument,	0, 'u' },
+			{ "daemonize",	no_argument,		0, 'D' },
+			{ "logfile",	required_argument,	0, 'l' },
+			{ "help",	no_argument,		0, 'h' },
+			{ "verbose",	no_argument,		0, 'v' },
+			{ "debug",	required_argument,	0, 'd' },
+			{ 0,		0,			0,  0  }
+		};
+
+		c = getopt_long(argc, argv, ":c:C:u:Dl:hvd:",
+				long_options, &option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'c':
+			cfg->cfg_dir = optarg;
+			break;
+
+		case 'C':
+			cfg->cfg_file = optarg;
+			break;
+
+		case 'v':
+			debug_mask |= DBG_VERBOSE;
+			break;
+
+		case 'D':
+			daemonize = true;
+			break;
+
+		case 'l':
+			log_file_path = optarg;
+			break;
+
+		case 'u': {
+			struct passwd *pwd;
+
+			errno = 0;
+			pwd = getpwnam(optarg);
+			if (!pwd) {
+				if (errno == 0)
+					errno = ESRCH;
+				if (errno == ESRCH)
+					die("failed to find user %s", optarg);
+				else
+					die("failed to find user %s (%m)", optarg);
+			}
+
+			debug(DBG_CFG, "asked to execute with uid %ji gid %ji",
+			      (intmax_t)pwd->pw_uid,
+			      (intmax_t)pwd->pw_gid);
+			cfg->uid = pwd->pw_uid;
+			cfg->gid = pwd->pw_gid;
+			break;
+		}
+
+		case 'd':
+			if (strcaseeq(optarg, "all")) {
+				debug_mask = ~0;
+				break;
+			} else if (strcaseeq(optarg, "list")) {
+				info("Debug categories:");
+				info(" * all");
+				for (i = 0; debug_category_str[i].name; i++)
+					info(" * %s", debug_category_str[i].name);
+				exit(EXIT_FAILURE);
+			}
+
+			for (i = 0; debug_category_str[i].name; i++) {
+				if (strcaseeq(optarg, debug_category_str[i].name))
+					break;
+			}
+
+			if (!debug_category_str[i].name)
+				usage(argc, argv, true);
+
+			debug_mask |= DBG_VERBOSE;
+			debug_mask |= debug_category_str[i].val;
+			break;
+
+		case 'h':
+			usage(argc, argv, false);
+
+		default:
+			usage(argc, argv, true);
+		}
+
+	}
+
+	if (optind < argc)
+		usage(argc, argv, true);
+}
+
+static void
+cfg_apply()
+{
+	if (cfg->uid == 0 || cfg->gid == 0)
+		/* This catches both -u root and running as root without -u */
+		die("Execution as root is not supported (use -u <someuser>)");
+
+	capng_clear(CAPNG_SELECT_BOTH);
+	if (capng_updatev(CAPNG_ADD,
+			  CAPNG_EFFECTIVE | CAPNG_PERMITTED,
+			  CAP_NET_RAW, CAP_NET_BIND_SERVICE, -1))
+		die("capng_updatev failed");
+
+	if (geteuid() != cfg->uid) {
+		if (capng_change_id(cfg->uid,
+				    cfg->gid,
+				    CAPNG_DROP_SUPP_GRP | CAPNG_CLEAR_BOUNDING))
+			die("capng_change_id failed");
+	} else {
+		/*
+		 * This can fail if any of the caps are lacking, but it'll
+		 * be re-checked later.
+		 */
+		capng_apply(CAPNG_SELECT_BOTH);
+		setgroups(0, NULL);
+	}
+
+	if (daemonize) {
+		if (daemon(1, 0) < 0)
+			die("daemon() failed: %m");
+	}
+
+	if (log_file_path) {
+		log_file = fopen(log_file_path, "ae");
+		if (!log_file)
+			die("fopen(%s) failed: %m", log_file_path);
+	}
+
+	/*
+	 * Do this after caps have been dropped to make sure we're not
+	 * accessing a directory we should have permissions to.
+	 */
+	if (chdir(cfg->cfg_dir))
+		die("chdir(%s): %m", cfg->cfg_dir);
+
+	if (debug_enabled(DBG_VERBOSE)) {
+		char *wd;
+
+		wd = get_current_dir_name();
+		verbose("Working directory: %s", wd ? wd : "<unknown>");
+		free(wd);
+	}
+}
+
+void
+dump_tree()
+{
+	struct server *server;
+
+	if (!debug_enabled(DBG_REF))
+		return;
+
+	info("\n\n");
+	info("Dumping Tree");
+	info("============");
+	uring_task_refdump(&cfg->task);
+	uring_refdump();
+	signal_refdump();
+	ptimer_refdump();
+	idle_refdump();
+	igmp_refdump();
+	announce_refdump();
+	server_cfg_monitor_refdump();
+	list_for_each_entry(server, &cfg->servers, list)
+		server_refdump(server);
+	info("============");
+	info("\n\n");
+}
+
+int
+main(int argc, char **argv)
+{
+	struct server *server;
+	unsigned server_count;
+	struct rlimit old_rlimit;
+
+	cfg_init(argc, argv);
+
+	cfg_apply();
+
+	cfg_read();
+
+	/*
+	 * In the splice case we use 4 fds per proxy connection...
+	 */
+	if (prlimit(0, RLIMIT_NOFILE, NULL, &old_rlimit) == 0) {
+		struct rlimit new_rlimit;
+
+		new_rlimit.rlim_cur = old_rlimit.rlim_max;
+		new_rlimit.rlim_max = old_rlimit.rlim_max;
+
+		if (prlimit(0, RLIMIT_NOFILE, &new_rlimit, NULL) == 0)
+			debug(DBG_MALLOC, "prlimit(NOFILE): %u/%u -> %u/%u",
+			      (unsigned)old_rlimit.rlim_cur,
+			      (unsigned)old_rlimit.rlim_max,
+			      (unsigned)new_rlimit.rlim_cur,
+			      (unsigned)new_rlimit.rlim_cur);
+	}
+
+	uring_init();
+
+	ptimer_init();
+
+	igmp_init();
+
+	/* Drop CAP_NET_RAW (if we have it), only used for igmp */
+	capng_clear(CAPNG_SELECT_BOTH);
+	if (capng_update(CAPNG_ADD,
+			 CAPNG_EFFECTIVE | CAPNG_PERMITTED,
+			 CAP_NET_BIND_SERVICE))
+		die("capng_update failed");
+
+	if (capng_apply(CAPNG_SELECT_BOTH)) {
+		/* Try clearing all caps, shouldn't fail */
+		capng_clear(CAPNG_SELECT_BOTH);
+		if (capng_apply(CAPNG_SELECT_BOTH))
+			die("capng_apply failed");
+	}
+
+	signal_init();
+
+	server_cfg_monitor_init();
+
+	announce_init();
+
+	if (!cfg->igmp)
+		announce_start(0);
+
+	idle_init();
+
+	uring_task_put(&cfg->task);
+
+	server_count = 0;
+	list_for_each_entry(server, &cfg->servers, list)
+		server_count++;
+
+	sd_notifyf(0, "READY=1\n"
+		   "STATUS=Running, %u server configurations loaded\n"
+		   "MAINPID=%lu",
+		   server_count,
+		   (unsigned long)getpid());
+
+	info("mcproxy (%s) started, %u server configurations loaded",
+	     VERSION, server_count);
+
+	uring_event_loop();
+
+	verbose("Exiting");
+
+	xfree(cfg);
+	cfg = NULL;
+
+	if (debug_enabled(DBG_MALLOC))
+		debug_resource_usage();
+
+	fflush(stdout);
+	fflush(stderr);
+	exit(EXIT_SUCCESS);
+}
diff --git a/mcserverproxy/main.h b/mcserverproxy/main.h
new file mode 100644
index 0000000..256ddae
--- /dev/null
+++ b/mcserverproxy/main.h
@@ -0,0 +1,175 @@
+#ifndef foomainhfoo
+#define foomainhfoo
+
+#include <sys/socket.h>
+#include <netinet/ip.h>
+
+struct cfg;
+
+#include "utils.h"
+
+extern struct cfg *cfg;
+extern bool exiting;
+extern unsigned debug_mask;
+
+enum debug_lvl {
+	DBG_ERROR	= (0x1 << 1),
+	DBG_INFO	= (0x1 << 2),
+	DBG_VERBOSE	= (0x1 << 3),
+	DBG_CFG		= (0x1 << 4),
+	DBG_REF		= (0x1 << 5),
+	DBG_MALLOC	= (0x1 << 6),
+	DBG_ANN		= (0x1 << 7),
+	DBG_SIG		= (0x1 << 8),
+	DBG_UR		= (0x1 << 9),
+	DBG_SRV		= (0x1 << 10),
+	DBG_PROXY	= (0x1 << 11),
+	DBG_RCON	= (0x1 << 12),
+	DBG_IDLE	= (0x1 << 13),
+	DBG_IGMP	= (0x1 << 14),
+	DBG_SYSD	= (0x1 << 15),
+	DBG_DNS		= (0x1 << 16),
+	DBG_TIMER	= (0x1 << 17),
+};
+
+static inline bool
+debug_enabled(enum debug_lvl lvl)
+{
+	return !!(lvl & debug_mask);
+}
+
+void __debug(enum debug_lvl lvl, const char *fmt, ...) __attribute__((format(printf, 2, 3)));
+
+#define __ifdebug(lvl, fmt, ...) 						\
+	do {									\
+		if (debug_enabled((lvl)))					\
+			__debug((lvl), fmt "\n"__VA_OPT__(,) __VA_ARGS__);	\
+	} while (0)
+
+#define debug(lvl, fmt, ...)	__ifdebug((lvl), "%s:%s:%i: " fmt,		\
+					  __FILE__, __func__, __LINE__ 		\
+					  __VA_OPT__(,) __VA_ARGS__)
+#define verbose(fmt, ...)	__ifdebug(DBG_VERBOSE, fmt, __VA_ARGS__)
+#define info(fmt, ...)		__ifdebug(DBG_INFO, fmt,  __VA_ARGS__)
+#define error(fmt, ...)		__ifdebug(DBG_ERROR, "%s:%s:%i: " fmt,		\
+					  __FILE__, __func__, __LINE__ 		\
+					  __VA_OPT__(,) __VA_ARGS__)
+
+void __die(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
+
+#define die(fmt, ...)								\
+	__die("%s:%s:%i: " fmt "\n",						\
+	      __FILE__, __func__, __LINE__					\
+	      __VA_OPT__(,) __VA_ARGS__)
+
+#define assert_log(expr, msg) 							\
+	((expr) ?								\
+	 (true) :								\
+	 (__debug(DBG_ERROR, "%s:%s:%i: assertion \"" msg "\" failed\n",	\
+		  __FILE__, __func__, __LINE__), false))
+
+#define assert_return(expr, ...)						\
+	do {									\
+		if (!assert_log(expr, #expr))					\
+			return __VA_ARGS__;					\
+	} while (0)
+
+#define assert_return_silent(expr, ...)						\
+	do {									\
+		if (!(expr))							\
+			return __VA_ARGS__;					\
+	} while (0)
+
+#define assert_die(expr, msg)							\
+	do {									\
+		if (!assert_log(expr, #expr))					\
+			die(msg);						\
+	} while (0)
+
+#define assert_task_alive_or(lvl, t, cmd) 	\
+do {						\
+	if (!(t)) {				\
+		error("invalid task");		\
+		cmd;				\
+	}					\
+						\
+	if ((t)->dead) {			\
+		debug((lvl), "task dead");	\
+		cmd;				\
+	}					\
+} while(0)
+
+#define assert_task_alive(lvl, t) assert_task_alive_or((lvl), (t), return)
+
+void dump_tree();
+
+struct uring_task;
+
+/* To save typing in all the function definitions below */
+typedef void (*utask_cb_t)(struct uring_task *, int res);
+typedef int (*rutask_cb_t)(struct uring_task *, int res);
+
+struct uring_task_buf {
+	char buf[4096];
+	size_t len;
+	size_t done;
+	struct iovec iov;
+	struct msghdr msg;
+};
+
+struct uring_task {
+	const char *name;
+	unsigned refcount;
+	int fd;
+	struct uring_task *parent;
+	void (*free)(struct uring_task *);
+	bool dead;
+	struct uring_task_buf *tbuf;
+
+	/* called once or repeatedly until is_complete_cb is satisfied */
+	utask_cb_t cb;
+
+	/* returns: 0 = not complete; < 0 = error; > 0 = complete */
+	rutask_cb_t is_complete_cb; 
+
+	/* called once tbuf processing is done */
+	utask_cb_t final_cb;
+
+	/* used for recvmsg/sendmsg */
+	struct saddr saddr;
+	void *priv;
+};
+
+struct cfg {
+	/* Options */
+	uid_t uid;
+	gid_t gid;
+	const char *cfg_dir;
+	const char *cfg_file;
+	bool do_igmp;
+	char *igmp_iface;
+	bool splice_supported;
+	uint16_t announce_interval;
+	uint16_t proxy_connection_interval;
+	uint16_t proxy_connection_attempts;
+	bool socket_defer;
+	bool socket_freebind;
+	bool socket_keepalive;
+	bool socket_iptos;
+	bool socket_nodelay;
+
+	/* Bookkeeping */
+	struct uring_ev *uring;
+	struct server_cfg_monitor *server_cfg_monitor;
+	struct signal_ev *signal;
+	struct announce *announce;
+	struct ptimer *ptimer;
+	struct igmp *igmp;
+	struct idle *idle;
+	struct sd_bus *sd_bus;
+	bool sd_bus_failed;
+	struct uring_task task;
+	struct list_head servers;
+};
+
+#endif
diff --git a/mcserverproxy/meson.build b/mcserverproxy/meson.build
new file mode 100644
index 0000000..e5fa7bc
--- /dev/null
+++ b/mcserverproxy/meson.build
@@ -0,0 +1,36 @@
+mcproxy_sources = [
+	'main.c',
+	'uring.c',
+	'signal-handler.c',
+	'server.c',
+	'server-proxy.c',
+	'server-config.c',
+	'server-rcon.c',
+	'announce.c',
+	'config-parser.c',
+	'idle.c',
+	'ptimer.c',
+	'igmp.c',
+	'systemd.c',
+	'utils.c'
+]
+
+dep_liburing   = dependency('liburing')
+dep_libsystemd = dependency('libsystemd')
+dep_libcapng   = dependency('libcap-ng')
+
+mcproxy_deps = [
+	dep_liburing,
+	dep_libsystemd,
+	dep_libcapng,
+	dep_config_h,
+	dep_libshared,
+]
+
+executable(
+	'mcproxy',
+	mcproxy_sources,
+	link_args: [ '-lanl' ],
+	dependencies: mcproxy_deps,
+)
+
diff --git a/mcserverproxy/ptimer.c b/mcserverproxy/ptimer.c
new file mode 100644
index 0000000..5f9cf5d
--- /dev/null
+++ b/mcserverproxy/ptimer.c
@@ -0,0 +1,223 @@
+#include <inttypes.h>
+#include <sys/timerfd.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+
+#include "main.h"
+#include "uring.h"
+#include "ptimer.h"
+
+struct ptimer {
+	uint64_t value;
+	time_t previous_time;
+	struct uring_task task;
+	unsigned task_count;
+	struct list_head ptasks;
+};
+
+static void
+ptimer_set(unsigned value, unsigned interval)
+{
+	struct itimerspec tspec = {
+		.it_interval = {
+			.tv_sec  = interval,
+			.tv_nsec = 0
+		},
+		.it_value = {
+			.tv_sec  = value,
+			.tv_nsec = 0
+		}
+	};
+
+	assert_return(cfg->ptimer && cfg->ptimer->task.fd >= 0);
+
+	if (timerfd_settime(cfg->ptimer->task.fd, 0, &tspec, NULL) != 0)
+		error("timerfd_settime: %m");
+}
+
+static unsigned
+gcd(unsigned a, unsigned b)
+{
+	if (a == 0)
+		return b;
+	return gcd(b % a, a);
+}
+
+static unsigned
+array_gcd(unsigned arr[], unsigned n)
+{
+	unsigned result = arr[0];
+
+	for (unsigned i = 1; i < n; i++)
+		result = gcd(arr[i], result);
+
+	return result;
+}
+
+static void
+ptimer_tick(struct ptimer *ptimer)
+{
+	time_t now = time(NULL);
+	unsigned diff = (unsigned)(now - ptimer->previous_time);
+	struct ptimer_task *ptask, *ptmp;
+
+	debug(DBG_TIMER, "got a tick of %u secs", diff);
+	list_for_each_entry_safe(ptask, ptmp, &ptimer->ptasks, list) {
+		if (ptask->remain > diff) {
+			ptask->remain -= diff;
+			continue;
+		}
+
+		debug(DBG_TIMER, "triggering ptask %p (times %u)",
+		      ptask, ptask->times);
+
+		ptask->cb(ptask);
+		ptask->remain = ptask->interval;
+
+		if (ptask->times == 0)
+			continue;
+
+		ptask->times--;
+		if (ptask->times == 0) {
+			ptask->active = false;
+			list_del(&ptask->list);
+		}
+	}
+
+	ptimer->previous_time = now;
+}
+
+static void
+ptimer_reconfig(struct ptimer *ptimer)
+{
+	struct ptimer_task *ptask;
+	unsigned i = 0;
+	unsigned lowest = ~0;
+	unsigned interval;
+
+	if (list_empty(&ptimer->ptasks)) {
+		debug(DBG_TIMER, "no tasks");
+		ptimer_set(0, 0);
+		return;
+	}
+
+	unsigned intervals[ptimer->task_count];
+
+	list_for_each_entry(ptask, &ptimer->ptasks, list) {
+		if (ptask->remain < lowest)
+			lowest = ptask->remain;
+		intervals[i++] = ptask->interval;
+	}
+
+	interval = array_gcd(intervals, i);
+
+	debug(DBG_TIMER, "lowest: %u, gcd: %u\n", lowest, interval);
+	ptimer_set(lowest, interval);
+}
+
+void
+ptimer_del_task(struct ptimer_task *ptask)
+{
+	struct ptimer *ptimer = cfg->ptimer;
+
+	assert_return(ptask && ptimer);
+	assert_return_silent(ptask->active);
+	assert_return(ptimer->task_count > 0);
+
+	list_del(&ptask->list);
+	ptask->active = false;
+	ptimer->task_count--;
+	ptimer_tick(ptimer);
+	ptimer_reconfig(ptimer);
+	uring_task_put(&ptimer->task);
+}
+
+void
+ptimer_add_task(struct ptimer_task *ptask)
+{
+	struct ptimer *ptimer = cfg->ptimer;
+
+	assert_return(ptask && ptask->interval > 0 && ptask->cb && ptimer);
+	assert_return_silent(!ptask->active);
+
+	uring_task_get(&ptimer->task);
+	ptask->active = true;
+	ptask->remain = ptask->interval;
+	ptimer_tick(ptimer);
+	list_add(&ptask->list, &ptimer->ptasks);
+	ptimer->task_count++;
+	ptimer_reconfig(ptimer);
+}
+
+void
+ptimer_refdump()
+{
+	assert_return(cfg->ptimer);
+
+	uring_task_refdump(&cfg->ptimer->task);
+}
+
+static void
+ptimer_free(struct uring_task *task)
+{
+	struct ptimer *ptimer = container_of(task, struct ptimer, task);
+
+	assert_return(task);
+
+	debug(DBG_TIMER, "task %p, ptimer %p", task, ptimer);
+	xfree(ptimer);
+	cfg->ptimer = NULL;
+}
+
+void
+ptimer_delete()
+{
+	assert_return(cfg->ptimer);
+
+	debug(DBG_TIMER, "closing fd %i", cfg->ptimer->task.fd);
+	uring_task_destroy(&cfg->ptimer->task);
+}
+
+static void
+ptimer_cb(struct uring_task *task, int res)
+{
+	struct ptimer *ptimer = container_of(task, struct ptimer, task);
+
+	assert_return(task);
+	assert_task_alive(DBG_IGMP, task);
+
+	if (res != sizeof(ptimer->value)) {
+		error("timerfd_read: res: %i, %m", res);
+		return;
+	}
+
+	ptimer_tick(ptimer);
+	uring_read(&ptimer->task, &ptimer->value, sizeof(ptimer->value), ptimer_cb);
+}
+
+void
+ptimer_init()
+{
+	struct ptimer *ptimer;
+	int tfd;
+ 
+	assert_return(!cfg->ptimer);
+
+	ptimer = zmalloc(sizeof(*ptimer));
+	if (!ptimer)
+		die("malloc: %m");
+
+	tfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
+	if (tfd < 0)
+		die("timerfd_create: %m");
+
+	ptimer->task_count = 0;
+	ptimer->previous_time = time(NULL);
+	list_init(&ptimer->ptasks);
+	uring_task_init(&ptimer->task, "ptimer", uring_parent(), ptimer_free);
+	uring_task_set_fd(&ptimer->task, tfd);
+	cfg->ptimer = ptimer;
+	uring_read(&ptimer->task, &ptimer->value, sizeof(ptimer->value), ptimer_cb);
+}
+
diff --git a/mcserverproxy/ptimer.h b/mcserverproxy/ptimer.h
new file mode 100644
index 0000000..0b53590
--- /dev/null
+++ b/mcserverproxy/ptimer.h
@@ -0,0 +1,33 @@
+#ifndef fooptimerhfoo
+#define fooptimerhfoo
+
+struct ptimer_task {
+	unsigned interval;
+	unsigned times;
+	void (*cb)(struct ptimer_task *);
+	bool active;
+	unsigned remain;
+	struct list_head list;
+};
+
+static inline void
+ptask_init(struct ptimer_task *ptask, unsigned interval,
+	   unsigned times, void(*cb)(struct ptimer_task *))
+{
+	ptask->interval = interval;
+	ptask->times = times;
+	ptask->cb = cb;
+	ptask->active = false;
+}
+
+void ptimer_del_task(struct ptimer_task *ptask);
+
+void ptimer_add_task(struct ptimer_task *ptask);
+
+void ptimer_refdump();
+
+void ptimer_delete();
+
+void ptimer_init();
+
+#endif
diff --git a/mcserverproxy/server-config.c b/mcserverproxy/server-config.c
new file mode 100644
index 0000000..549cf16
--- /dev/null
+++ b/mcserverproxy/server-config.c
@@ -0,0 +1,580 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <stdbool.h>
+#include <sys/inotify.h>
+#include <dirent.h>
+#include <errno.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <inttypes.h>
+
+#include "main.h"
+#include "uring.h"
+#include "config-parser.h"
+#include "server.h"
+#include "server-config.h"
+
+static void
+scfg_dns_cb(struct dns_async *dns, bool (*server_cb)(struct server *, struct saddr *))
+{
+	struct server *server;
+	struct sockaddr_in *in4;
+	struct sockaddr_in6 *in6;
+	struct saddr *saddr;
+	struct addrinfo *results = NULL, *ai;
+	int r;
+
+	assert_return(dns && dns->priv && server_cb);
+
+	server = dns->priv;
+	debug(DBG_DNS, "called, dns: %p, name: %s, server: %p, server->name: %s",
+	      dns, dns->name, server, server->name);
+
+	r = gai_error(&dns->gcb);
+	if (r == EAI_INPROGRESS) {
+		/* This shouldn't happen, assume we'll get called again */
+		error("called with request in progress");
+		return;
+	} else if (r == EAI_CANCELED) {
+		/* The server must be in the process of going away */
+		goto out;
+	} else if (r < 0) {
+		error("DNS lookup of %s:%s failed: %s",
+		      dns->name, dns->port, gai_strerror(r));
+		goto out;
+	}
+
+	results = dns->gcb.ar_result;
+
+	for (ai = results; ai; ai = ai->ai_next) {
+		saddr = zmalloc(sizeof(*saddr));
+		if (!saddr) {
+			error("DNS lookup of %s:%s failed: %m", dns->name, dns->port);
+			goto out;
+		}
+
+		switch (ai->ai_family) {
+		case AF_INET:
+			in4 = (struct sockaddr_in *)ai->ai_addr;
+			saddr_set_ipv4(saddr, in4->sin_addr.s_addr, in4->sin_port);
+			server_cb(server, saddr);
+			break;
+
+		case AF_INET6:
+			in6 = (struct sockaddr_in6 *)ai->ai_addr;
+			saddr_set_ipv6(saddr, &in6->sin6_addr, in6->sin6_port);
+			server_cb(server, saddr);
+			break;
+
+		default:
+			error("getaddrinfo(%s:%s): unknown address family (%i)",
+			      dns->name, dns->port, ai->ai_family);
+			xfree(saddr);
+			break;
+		}
+	}
+
+out:
+	freeaddrinfo(results);
+	list_del(&dns->list);
+	xfree(dns);
+	uring_task_put(&server->task);
+	server_commit(server);
+}
+
+static void
+scfg_local_dns_cb(struct dns_async *dns)
+{
+	assert_return(dns);
+
+	scfg_dns_cb(dns, server_add_local);
+}
+
+static void
+scfg_remote_dns_cb(struct dns_async *dns)
+{
+	assert_return(dns);
+
+	scfg_dns_cb(dns, server_add_remote);
+}
+
+static void
+scfg_rcon_dns_cb(struct dns_async *dns)
+{
+	assert_return(dns);
+
+	scfg_dns_cb(dns, server_add_rcon);
+}
+
+enum scfg_keys {
+	SCFG_KEY_INVALID = 0,
+	SCFG_KEY_TYPE,
+	SCFG_KEY_NAME,
+	SCFG_KEY_PORT,
+	SCFG_KEY_LOCAL,
+	SCFG_KEY_REMOTE,
+	SCFG_KEY_IDLE_TIMEOUT,
+	SCFG_KEY_STOP_METHOD,
+	SCFG_KEY_START_METHOD,
+	SCFG_KEY_STOP_EXEC,
+	SCFG_KEY_START_EXEC,
+	SCFG_KEY_RCON,
+	SCFG_KEY_RCON_PASSWORD,
+	SCFG_KEY_SYSTEMD_SERVICE,
+};
+
+struct cfg_key_value_map scfg_key_map[] = {
+	{
+		.key_name = "type",
+		.key_value = SCFG_KEY_TYPE,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = "name",
+		.key_value = SCFG_KEY_NAME,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = "port",
+		.key_value = SCFG_KEY_PORT,
+		.value_type = CFG_VAL_TYPE_UINT16,
+	}, {
+		.key_name = "local",
+		.key_value = SCFG_KEY_LOCAL,
+		.value_type = CFG_VAL_TYPE_ASYNC_ADDRS,
+	}, {
+		.key_name = "remote",
+		.key_value = SCFG_KEY_REMOTE,
+		.value_type = CFG_VAL_TYPE_ASYNC_ADDRS,
+	}, {
+		.key_name = "idle_timeout",
+		.key_value = SCFG_KEY_IDLE_TIMEOUT,
+		.value_type = CFG_VAL_TYPE_UINT16,
+	}, {
+		.key_name = "stop_method",
+		.key_value = SCFG_KEY_STOP_METHOD,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = "start_method",
+		.key_value = SCFG_KEY_START_METHOD,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = "stop_exec",
+		.key_value = SCFG_KEY_STOP_EXEC,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = "start_exec",
+		.key_value = SCFG_KEY_START_EXEC,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = "rcon",
+		.key_value = SCFG_KEY_RCON,
+		.value_type = CFG_VAL_TYPE_ASYNC_ADDRS,
+	}, {
+		.key_name = "rcon_password",
+		.key_value = SCFG_KEY_RCON_PASSWORD,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = "systemd_service",
+		.key_value = SCFG_KEY_SYSTEMD_SERVICE,
+		.value_type = CFG_VAL_TYPE_STRING,
+	}, {
+		.key_name = NULL,
+		.key_value = SCFG_KEY_INVALID,
+		.value_type = CFG_VAL_TYPE_INVALID,
+	}
+};
+
+static bool
+handle_dns(struct server *server, const char *type,
+	   struct cfg_value *value, dns_cb_t *async_cb,
+	   bool (*sync_cb)(struct server *, struct saddr *))
+{
+	struct saddr *saddr, *tmp;
+	struct dns_async *dns;
+
+	assert_return(server && type && value && async_cb && sync_cb, false);
+
+	switch (value->type) {
+	case CFG_VAL_TYPE_ADDRS:
+		debug(DBG_DNS, "%s: got immediate addrs", type);
+
+		list_for_each_entry_safe(saddr, tmp, &value->saddrs, list) {
+			list_del(&saddr->list);
+			sync_cb(server, saddr);
+		}
+		return true;
+
+	case CFG_VAL_TYPE_ASYNC_ADDRS:
+		debug(DBG_DNS, "%s: doing async lookup of DNS record: %p",
+		      type, value->dns_async);
+
+		dns = value->dns_async;
+		dns->cb = async_cb;
+		dns->priv = server;
+		list_add(&dns->list, &server->dnslookups);
+		uring_task_get(&server->task);
+		return true;
+
+	default:
+		return false;
+	}
+}
+
+static void
+scfg_parse(struct server *server)
+{
+	char *pos;
+
+	assert_return(server);
+
+	pos = server->tbuf.buf;
+
+	if (!config_parse_header(server->name, "server", &pos))
+		return;
+
+	while (true) {
+		int key;
+		const char *keyname;
+		struct cfg_value value;
+
+		if (!config_parse_line(server->name, &pos, scfg_key_map,
+				       &key, &keyname, &value))
+			break;
+
+		if (key == SCFG_KEY_INVALID)
+			break;
+
+		debug(DBG_CFG, "%s: key %s", server->name, keyname);
+
+		switch (key) {
+
+		case SCFG_KEY_TYPE:
+			if (streq(value.str, "proxy")) {
+				if (!server_set_type(server, SERVER_TYPE_PROXY))
+					return;
+			} else if (streq(value.str, "announce")) {
+				if (!server_set_type(server, SERVER_TYPE_ANNOUNCE))
+					return;
+			}
+			break;
+
+		case SCFG_KEY_NAME:
+			if (!server_set_pretty_name(server, value.str))
+				return;
+			break;
+
+		case SCFG_KEY_PORT:
+			if (!server_set_port(server, value.uint16))
+				return;
+			break;
+
+		case SCFG_KEY_LOCAL:
+			if (!handle_dns(server, "local", &value,
+					scfg_local_dns_cb, server_add_local))
+				return;
+			break;
+
+		case SCFG_KEY_REMOTE:
+			if (!handle_dns(server, "remote", &value,
+					scfg_remote_dns_cb, server_add_remote))
+				return;
+			break;
+
+		case SCFG_KEY_IDLE_TIMEOUT:
+			if (!server_set_idle_timeout(server, value.uint16))
+				return;
+			break;
+
+		case SCFG_KEY_STOP_METHOD:
+			if (streq(value.str, "exec")) {
+				if (server_set_stop_method(server, SERVER_STOP_METHOD_EXEC))
+					break;
+			} else if (streq(value.str, "rcon")) {
+				if (server_set_stop_method(server, SERVER_STOP_METHOD_RCON))
+					break;
+			} else if (streq(value.str, "systemd")) {
+				if (server_set_stop_method(server, SERVER_STOP_METHOD_SYSTEMD))
+					break;
+			}
+			return;
+
+		case SCFG_KEY_START_METHOD:
+			if (streq(value.str, "exec")) {
+				if (server_set_start_method(server, SERVER_START_METHOD_EXEC))
+					break;
+			} else if (streq(value.str, "systemd")) {
+				if (server_set_start_method(server, SERVER_START_METHOD_SYSTEMD))
+					break;
+			}
+			return;
+
+		case SCFG_KEY_STOP_EXEC:
+			if (!server_set_stop_exec(server, value.str))
+				return;
+			break;
+
+		case SCFG_KEY_START_EXEC:
+			if (!server_set_start_exec(server, value.str))
+				return;
+			break;
+
+		case SCFG_KEY_RCON:
+			if (!handle_dns(server, "rcon", &value,
+					scfg_rcon_dns_cb, server_add_rcon))
+				return;
+			break;
+
+		case SCFG_KEY_RCON_PASSWORD:
+			if (!server_set_rcon_password(server, value.str))
+				return;
+			break;
+
+		case SCFG_KEY_SYSTEMD_SERVICE:
+			if (!server_set_systemd_service(server, value.str))
+				return;
+			break;
+
+		case SCFG_KEY_INVALID:
+		default:
+			break;
+		}
+	}
+}
+
+static void
+scfg_read_cb(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, task);
+
+	assert_return(task);
+	assert_task_alive(DBG_CFG, task);
+
+	if (res <= 0) {
+		error("error reading config file for %s: %s",
+		      server->name, strerror(-res));
+		server_delete(server);
+	}
+
+	debug(DBG_CFG, "%s: parsing cfg (%i bytes)", server->name, res);
+	uring_task_close_fd(&server->task);
+	scfg_parse(server);
+	server_commit(server);
+}
+
+static void 
+scfg_open_cb(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, task);
+
+	assert_return(task);
+	assert_task_alive(DBG_CFG, task);
+
+	if (res < 0) {
+		error("open(%s) failed: %s", server->name, strerror(-res));
+		server_delete(server);
+		return;
+	}
+
+	debug(DBG_CFG, "reading server cfg %s (fd %i)", server->name, res);
+	uring_task_set_fd(&server->task, res);
+	uring_tbuf_read_until_eof(&server->task, scfg_read_cb);
+}
+
+static bool
+scfg_valid_filename(const char *name)
+{
+	const char *suffix;
+
+	if (empty_str(name))
+		return false;
+	if (name[0] == '.')
+		return false;
+	if ((suffix = strrchr(name, '.')) == NULL)
+		return false;
+	if (!streq(suffix, ".server"))
+		return false;
+
+	return true;
+}
+
+struct server_cfg_monitor {
+	struct uring_task task;
+	char buf[4096] __attribute__((aligned(__alignof__(struct inotify_event))));
+};
+
+static void
+scfgm_free(struct uring_task *task)
+{
+	struct server_cfg_monitor *scfgm = container_of(task,
+							struct server_cfg_monitor,
+							task);
+
+	assert_return(task);
+
+	debug(DBG_CFG, "called");
+	xfree(scfgm);
+	cfg->server_cfg_monitor = NULL;
+}
+
+static void
+inotify_event_dump(const struct inotify_event *event)
+{
+	assert_return(event);
+
+	debug(DBG_CFG, "inotify event:");
+	debug(DBG_CFG, " * WD     : %i", event->wd);
+	debug(DBG_CFG, " * Cookie : %" PRIu32, event->cookie);
+	debug(DBG_CFG, " * Length : %" PRIu32, event->len);
+	debug(DBG_CFG, " * Name   : %s", event->name);
+	debug(DBG_CFG, " * Mask   : %" PRIu32, event->mask);
+	if (event->mask & IN_ACCESS)
+		debug(DBG_CFG, "\tIN_ACCESS");
+	else if(event->mask & IN_MODIFY)
+		debug(DBG_CFG, "\tIN_MODIFY");
+	else if(event->mask & IN_ATTRIB)
+		debug(DBG_CFG, "\tIN_ATTRIB");
+	else if(event->mask & IN_CLOSE_WRITE)
+		debug(DBG_CFG, "\tIN_CLOSE_WRITE");
+	else if(event->mask & IN_CLOSE_NOWRITE)
+		debug(DBG_CFG, "\tIN_CLOSE_NOWRITE");
+	else if(event->mask & IN_OPEN)
+		debug(DBG_CFG, "\tIN_OPEN");
+	else if(event->mask & IN_MOVED_FROM)
+		debug(DBG_CFG, "\tIN_MOVED_FROM");
+	else if(event->mask & IN_MOVED_TO)
+		debug(DBG_CFG, "\tIN_MOVED_TO");
+	else if(event->mask & IN_CREATE)
+		debug(DBG_CFG, "\tIN_CREATE");
+	else if(event->mask & IN_DELETE)
+		debug(DBG_CFG, "\tIN_DELETE");
+	else if(event->mask & IN_DELETE_SELF)
+		debug(DBG_CFG, "\tIN_DELETE_SELF");
+	else if(event->mask & IN_MOVE_SELF)
+		debug(DBG_CFG, "\tIN_MOVE_SELF");
+	else if(event->mask & IN_UNMOUNT)
+		debug(DBG_CFG, "\tIN_UNMOUNT");
+	else if(event->mask & IN_Q_OVERFLOW)
+		debug(DBG_CFG, "\tIN_Q_OVERFLOW");
+	else if(event->mask & IN_IGNORED)
+		debug(DBG_CFG, "\tIN_IGNORED");
+}
+
+static void
+inotify_cb(struct uring_task *task, int res)
+{
+	struct server_cfg_monitor *scfgm = container_of(task,
+							struct server_cfg_monitor,
+							task);
+	const struct inotify_event *event;
+	char *ptr;
+	struct server *server;
+
+	assert_return(task);
+	assert_task_alive(DBG_CFG, task);
+
+	if (res <= 0) {
+		error("inotify_read: %i", res);
+		return;
+	}
+
+	for (ptr = scfgm->buf; ptr < scfgm->buf + res; ptr += sizeof(struct inotify_event) + event->len) {
+		event = (const struct inotify_event *)ptr;
+
+		if (debug_enabled(DBG_CFG))
+			inotify_event_dump(event);
+
+		if (event->mask & (IN_IGNORED | IN_MOVE_SELF | IN_DELETE_SELF | IN_UNMOUNT))
+			die("configuration directory gone, exiting");
+
+		if (event->mask & IN_Q_OVERFLOW) {
+			error("inotify queue overflow");
+			continue;
+		}
+
+		if (!scfg_valid_filename(event->name))
+			continue;
+
+		if (event->mask & (IN_MOVED_FROM | IN_DELETE))
+			server_delete_by_name(event->name);
+		else if (event->mask & (IN_MOVED_TO | IN_CREATE | IN_CLOSE_WRITE)) {
+			server = server_new(event->name);
+			verbose("New server config file detected: %s", server->name);
+			uring_openat(&server->task, server->name, scfg_open_cb);
+		} else
+			error("inotify: unknown event: 0x%08x", event->mask);
+	}
+
+	uring_read(&scfgm->task, scfgm->buf, sizeof(scfgm->buf), inotify_cb);
+}
+
+void
+server_cfg_monitor_refdump()
+{
+	assert_return_silent(cfg->server_cfg_monitor);
+
+	uring_task_refdump(&cfg->server_cfg_monitor->task);
+}
+
+void
+server_cfg_monitor_delete()
+{
+	assert_return(cfg->server_cfg_monitor);
+
+	debug(DBG_CFG, "closing fd %i", cfg->server_cfg_monitor->task.fd);
+	uring_task_destroy(&cfg->server_cfg_monitor->task);
+	cfg->server_cfg_monitor = NULL;
+}
+
+void
+server_cfg_monitor_init()
+{
+	int ifd;
+	int iwd;
+	struct server_cfg_monitor *scfgm;
+	DIR *dir;
+	struct dirent *dent;
+	struct server *server;
+
+	assert_return(!cfg->server_cfg_monitor);
+
+	scfgm = zmalloc(sizeof(*scfgm));
+	if (!scfgm)
+		die("malloc: %m");
+
+	ifd = inotify_init1(IN_CLOEXEC);
+	if (ifd < 0)
+		die("inotify_init1: %m");
+
+	/* ln = IN_CREATE, cp/vi/mv = IN_CREATE, IN_OPEN, IN_CLOSE_WRITE */
+	iwd = inotify_add_watch(ifd, ".",
+				IN_CLOSE_WRITE | IN_DELETE | IN_CREATE |
+				IN_DELETE_SELF | IN_MOVE_SELF | IN_MOVED_TO |
+				IN_MOVED_FROM | IN_DONT_FOLLOW |
+				IN_EXCL_UNLINK | IN_ONLYDIR );
+	if (iwd < 0)
+		die("inotify_add_watch: %m");
+
+	uring_task_init(&scfgm->task, "server-config-monitor", uring_parent(), scfgm_free);
+	uring_task_set_fd(&scfgm->task, ifd);
+	cfg->server_cfg_monitor = scfgm;
+	uring_read(&scfgm->task, scfgm->buf, sizeof(scfgm->buf), inotify_cb);
+
+	dir = opendir(".");
+	if (!dir)
+		die("opendir(%s): %m", cfg->cfg_dir);
+
+	while ((dent = readdir(dir)) != NULL) {
+		if (dent->d_type != DT_REG && dent->d_type != DT_UNKNOWN)
+			continue;
+		if (!scfg_valid_filename(dent->d_name))
+			continue;
+
+		server = server_new(dent->d_name);
+		if (server)
+			uring_openat(&server->task, server->name, scfg_open_cb);
+	}
+
+	closedir(dir);
+}
+
diff --git a/mcserverproxy/server-config.h b/mcserverproxy/server-config.h
new file mode 100644
index 0000000..590dae0
--- /dev/null
+++ b/mcserverproxy/server-config.h
@@ -0,0 +1,10 @@
+#ifndef fooserverconfighfoo
+#define fooserverconfighfoo
+
+void server_cfg_monitor_delete();
+
+void server_cfg_monitor_refdump();
+
+void server_cfg_monitor_init();
+
+#endif
diff --git a/mcserverproxy/server-proxy.c b/mcserverproxy/server-proxy.c
new file mode 100644
index 0000000..4cbbb87
--- /dev/null
+++ b/mcserverproxy/server-proxy.c
@@ -0,0 +1,578 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "main.h"
+#include "uring.h"
+#include "ptimer.h"
+#include "server.h"
+#include "server-proxy.h"
+#include "utils.h"
+
+static void
+format_bytes(char *buf, size_t len, uint64_t val)
+{
+	uint64_t tmp;
+	const char *suffix = "B";
+
+	assert_return(buf && len > 0);
+
+	tmp = val * 10;
+	if (val > 1152921504606846976ULL) {
+		tmp = val / 115292150460684697ULL;
+		suffix= "EiB";
+	} else if (val > 1125899906842624ULL) {
+		tmp /= 1125899906842624ULL;
+		suffix = "PiB";
+	} else  if (val > 1099511627776ULL) {
+		tmp /= 1099511627776ULL;
+		suffix = "TiB";
+	} else if (val > 1073741824ULL) {
+		tmp /= 1073741824ULL;
+		suffix = "GiB";
+	} else if (val > 1048576) {
+		tmp /= 1048576;
+		suffix = "MiB";
+	} else if (val > 1024) {
+		tmp /= 1024;
+		suffix = "KiB";
+	}
+
+	snprintf(buf, len, "%lu.%lu %s", tmp / 10, tmp % 10, suffix);
+}
+
+static void
+format_time(char *buf, size_t len, time_t diff)
+{
+	unsigned hh, mm, ss;
+
+	assert_return(buf && len > 0);
+
+	hh = diff / 3600;
+	diff %= 3600;
+	mm = diff / 60;
+	diff %= 60;
+	ss = diff;
+
+	snprintf(buf, len, "%02u:%02u:%02u", hh, mm, ss);
+}
+
+static void
+proxy_free(struct uring_task *task)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, task);
+	char cts[100];
+	char stc[100];
+	char duration[100];
+
+	assert_return(task);
+
+	debug(DBG_PROXY, "server: %s, src: %s, dst: %s",
+	      proxy->server->name,
+	      proxy->client_conn.remote.addrstr,
+	      proxy->server_conn.remote.addrstr);
+
+	if (proxy->begin > 0) {
+		format_time(duration, sizeof(duration), time(NULL) - proxy->begin);
+		format_bytes(cts, sizeof(cts), proxy->client_bytes);
+		format_bytes(stc, sizeof(stc), proxy->server_bytes);
+
+		info("%s: proxy connection %s -> %s closed "
+		     "(CtS: %s, StC: %s), duration %s",
+		     proxy->server->name,
+		     proxy->client_conn.remote.addrstr,
+		     proxy->server_conn.remote.addrstr,
+		     cts, stc, duration);
+	}
+
+	list_del(&proxy->list);
+	xfree(proxy);
+}
+
+static void
+proxy_client_free(struct uring_task *task)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, clienttask);
+
+	assert_return(task);
+
+	debug(DBG_PROXY, "%s: client connection closed", proxy->server->name);
+}
+
+static void
+proxy_server_free(struct uring_task *task)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
+
+	assert_return(task);
+
+	debug(DBG_PROXY, "%s: server connection closed", proxy->server->name);
+}
+
+void
+proxy_delete(struct server_proxy *proxy)
+{
+	debug(DBG_PROXY, "%s: shutting down proxy %p", proxy->server->name, proxy);
+
+	assert_return(proxy);
+
+	ptimer_del_task(&proxy->ptask);
+
+	if (cfg->splice_supported) {
+		uring_close(&proxy->server->task, proxy->cpipe[PIPE_RD]);
+		uring_close(&proxy->server->task, proxy->cpipe[PIPE_WR]);
+		uring_close(&proxy->server->task, proxy->spipe[PIPE_RD]);
+		uring_close(&proxy->server->task, proxy->spipe[PIPE_WR]);
+	}
+
+	uring_task_set_fd(&proxy->servertask, proxy->sfd);
+	uring_task_destroy(&proxy->servertask);
+	uring_task_set_fd(&proxy->clienttask, proxy->cfd);
+	uring_task_destroy(&proxy->clienttask);
+	uring_task_destroy(&proxy->task);
+}
+
+/*
+ * These four functions provide the fallback read-write mode
+ */
+static void proxy_client_read(struct uring_task *task, int res);
+
+static void
+proxy_client_written(struct uring_task *task, int res)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, clienttask);
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	if (res <= 0) {
+		debug(DBG_PROXY, "%s: res: %i", proxy->server->name, res);
+		proxy_delete(proxy);
+		return;
+	}
+
+	proxy->client_bytes += res;
+	uring_task_set_fd(&proxy->clienttask, proxy->cfd);
+	uring_tbuf_read(task, proxy_client_read);
+}
+
+static void
+proxy_client_read(struct uring_task *task, int res)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, clienttask);
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	if (res <= 0) {
+		debug(DBG_PROXY, "%s: res: %i", proxy->server->name, res);
+		proxy_delete(proxy);
+		return;
+	}
+
+	uring_task_set_fd(&proxy->clienttask, proxy->sfd);
+	uring_tbuf_write(task, proxy_client_written);
+}
+
+static void proxy_server_read(struct uring_task *task, int res);
+
+static void
+proxy_server_written(struct uring_task *task, int res)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	if (res <= 0) {
+		debug(DBG_PROXY, "%s: res: %i", proxy->server->name, res);
+		proxy_delete(proxy);
+		return;
+	}
+
+	proxy->server_bytes += res;
+	uring_task_set_fd(&proxy->servertask, proxy->sfd);
+	uring_tbuf_read(&proxy->servertask, proxy_server_read);
+}
+
+static void
+proxy_server_read(struct uring_task *task, int res)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	if (res <= 0) {
+		debug(DBG_PROXY, "%s: res: %i", proxy->server->name, res);
+		proxy_delete(proxy);
+		return;
+	}
+
+	uring_task_set_fd(&proxy->servertask, proxy->cfd);
+	uring_tbuf_write(task, proxy_server_written);
+}
+
+/*
+ * These four functions provide the splice fd->pipe->fd mode
+ */
+static void proxy_client_spliced_in(struct uring_task *task, int res);
+
+static void
+proxy_client_spliced_out(struct uring_task *task, int res)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	if (res <= 0) {
+		debug(DBG_PROXY, "%s: res: %i", proxy->server->name, res);
+		proxy_delete(proxy);
+		return;
+	}
+
+	uring_splice(task, proxy->cfd, proxy->cpipe[PIPE_WR], proxy_client_spliced_in);
+}
+
+static void
+proxy_client_spliced_in(struct uring_task *task, int res)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	if (res <= 0) {
+		debug(DBG_PROXY, "%s: res: %i", proxy->server->name, res);
+		proxy_delete(proxy);
+		return;
+	}
+
+	uring_splice(task, proxy->cpipe[PIPE_RD], proxy->sfd, proxy_client_spliced_out);
+}
+
+static void proxy_server_spliced_in(struct uring_task *task, int res);
+
+static void
+proxy_server_spliced_out(struct uring_task *task, int res)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	if (res <= 0) {
+		debug(DBG_PROXY, "%s: res: %i", proxy->server->name, res);
+		proxy_delete(proxy);
+		return;
+	}
+
+	uring_splice(task, proxy->sfd, proxy->spipe[PIPE_WR], proxy_server_spliced_in);
+}
+
+static void
+proxy_server_spliced_in(struct uring_task *task, int res)
+{
+	struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	if (res <= 0) {
+		debug(DBG_PROXY, "%s: res: %i", proxy->server->name, res);
+		proxy_delete(proxy);
+		return;
+	}
+
+	uring_splice(task, proxy->spipe[PIPE_RD], proxy->cfd, proxy_server_spliced_out);
+}
+
+static void
+proxy_connected_cb(struct connection *conn, bool connected)
+{
+	struct server_proxy *proxy = container_of(conn, struct server_proxy, server_conn);
+
+	assert_return(conn);
+	assert_task_alive(DBG_PROXY, &proxy->clienttask);
+	assert_task_alive(DBG_PROXY, &proxy->servertask);
+
+	proxy->connecting = false;
+	if (!connected) {
+		error("%s: proxy connection to remote server failed",
+		      proxy->server->name);
+		if (!proxy->ptask.active)
+			proxy_delete(proxy);
+		return;
+	}
+
+	ptimer_del_task(&proxy->ptask);
+
+	proxy->sfd = proxy->servertask.fd;
+	verbose("%s: proxy connection %s -> %s opened",
+		proxy->server->name,
+		proxy->client_conn.remote.addrstr,
+		proxy->server_conn.remote.addrstr);
+	proxy->begin = time(NULL);
+
+	if (cfg->splice_supported) {
+		debug(DBG_PROXY, "handling proxy connection with splice");
+		uring_splice(&proxy->clienttask, proxy->cfd, proxy->cpipe[PIPE_WR], proxy_client_spliced_in);
+		uring_splice(&proxy->servertask, proxy->sfd, proxy->spipe[PIPE_WR], proxy_server_spliced_in);
+	} else {
+		debug(DBG_PROXY, "handling proxy connection with read-write");
+		uring_tbuf_read(&proxy->clienttask, proxy_client_read);
+		uring_tbuf_read(&proxy->servertask, proxy_server_read);
+	}
+}
+
+void
+proxy_refdump(struct server_proxy *proxy)
+{
+	assert_return(proxy);
+
+	uring_task_refdump(&proxy->task);
+	uring_task_refdump(&proxy->clienttask);
+	uring_task_refdump(&proxy->servertask);
+}
+
+static void
+proxy_connect_timer_cb(struct ptimer_task *ptask)
+{
+	struct server_proxy *proxy = container_of(ptask, struct server_proxy, ptask);
+
+	assert_return(ptask);
+
+	if (proxy->connecting)
+		return;
+
+	proxy->connecting = true;
+	connect_any(&proxy->servertask, &proxy->server->remotes,
+		    &proxy->server_conn, proxy_connected_cb);
+}
+
+struct server_proxy *
+proxy_new(struct server *server, struct saddr *client, int fd)
+{
+	struct server_proxy *proxy;
+
+	assert_return(server && client && fd > 0, NULL);
+
+	proxy = zmalloc(sizeof(*proxy));
+	if (!proxy) {
+		error("malloc: %m");
+		goto out;
+	}
+
+	if (cfg->splice_supported) {
+		if (pipe2(proxy->cpipe, O_CLOEXEC) < 0) {
+			error("pipe2: %m");
+			goto out_free;
+		}
+
+		if (pipe2(proxy->spipe, O_CLOEXEC) < 0) {
+			error("pipe2: %m");
+			goto out_close_cpipe;
+		}
+	}
+
+	proxy->sfd = -1;
+	proxy->cfd = fd;
+	proxy->server = server;
+	uring_task_init(&proxy->task, "proxy", &server->task, proxy_free);
+
+	connection_set_local(&proxy->client_conn, fd);
+	connection_set_remote(&proxy->client_conn, client);
+
+	uring_task_init(&proxy->clienttask, "proxy_client", &proxy->task,
+			proxy_client_free);
+	uring_task_set_buf(&proxy->clienttask, &proxy->clientbuf);
+	uring_task_set_fd(&proxy->clienttask, fd);
+
+	uring_task_init(&proxy->servertask, "proxy_server", &proxy->task,
+			proxy_server_free);
+	uring_task_set_buf(&proxy->servertask, &proxy->serverbuf);
+
+	list_add(&proxy->list, &server->proxys);
+
+	if (server->state != SERVER_STATE_RUNNING) {
+		if (server_start(server) &&
+		    cfg->proxy_connection_interval > 0 &&
+		    cfg->proxy_connection_attempts > 0) {
+			ptask_init(&proxy->ptask,
+				   cfg->proxy_connection_interval,
+				   cfg->proxy_connection_attempts,
+				   proxy_connect_timer_cb);
+			ptimer_add_task(&proxy->ptask);
+		}
+	}
+
+	proxy->connecting = true;
+	connect_any(&proxy->servertask, &server->remotes,
+		    &proxy->server_conn, proxy_connected_cb);
+
+	return proxy;
+
+out_close_cpipe:
+	uring_close(&server->task, proxy->cpipe[PIPE_RD]);
+	uring_close(&server->task, proxy->cpipe[PIPE_WR]);
+out_free:
+	xfree(proxy);
+out:
+	return NULL;
+}
+
+static void
+local_accept(struct uring_task *task, int res)
+{
+	struct server_local *local = container_of(task, struct server_local, task);
+	struct server *server = container_of(task->parent, struct server, task);
+	struct server_proxy *proxy;
+
+	assert_return(task);
+	assert_task_alive(DBG_PROXY, task);
+
+	debug(DBG_PROXY, "task %p, res %i, server %s", task, res, server->name);
+
+	if (res < 0) {
+		error("res: %i", res);
+		goto out;
+	}
+
+	saddr_set_addrstr(&local->client);
+
+	verbose("%s: incoming proxy connection: %s -> %s",
+		server->name, local->client.addrstr, local->local.addrstr);
+
+	if (list_empty(&server->remotes)) {
+		/* This shouldn't be possible, checked before opening local */
+		error("server->remotes empty!");
+		uring_close(&local->task, res);
+		goto out;
+	}
+
+	proxy = proxy_new(server, &local->client, res);
+	if (!proxy)
+		uring_close(&local->task, res);
+
+out:
+	uring_accept(&local->task, &local->client, local_accept);
+}
+
+bool
+local_open(struct server_local *local)
+{
+	int sfd;
+	int option;
+	int r;
+
+	assert_return(local && local->server, false);
+
+	sfd = socket(local->local.storage.ss_family, SOCK_STREAM | SOCK_CLOEXEC, 0);
+	if (sfd < 0) {
+		error("socket: %m");
+		goto error;
+	}
+
+	option = true;
+	if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)) < 0) {
+		error("setsockopt: %m");
+		goto error;
+	}
+
+	/* The MC protocol expects the client to send data first */
+	if (cfg->socket_defer) {
+		option = true;
+		if (setsockopt(sfd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &option, sizeof(option)) < 0)
+			error("setsockopt: %m");
+	}
+
+	/*
+	 * This has the advantage that interfaces don't need to be up but
+	 * it means that cfg errors will not be caught.
+	 */
+	if (cfg->socket_freebind) {
+		option = true;
+		if (setsockopt(sfd, IPPROTO_IP, IP_FREEBIND, &option, sizeof(option)) < 0)
+			error("setsockopt: %m");
+	}
+
+	socket_set_low_latency(sfd);
+
+	r = bind(sfd, (struct sockaddr *)&local->local.storage, local->local.addrlen);
+	if (r < 0) {
+		error("bind: %m");
+		goto error;
+	}
+
+	r = listen(sfd, 100);
+	if (r < 0) {
+		error("listen: %m");
+		goto error;
+	}
+
+	uring_task_set_fd(&local->task, sfd);
+	uring_accept(&local->task, &local->client, local_accept);
+	return true;
+
+error:
+	if (sfd >= 0)
+		uring_close(&local->task, sfd);
+	return false;
+}
+
+void
+local_refdump(struct server_local *local)
+{
+	assert_return(local);
+
+	uring_task_refdump(&local->task);
+}
+
+static void
+local_free(struct uring_task *task)
+{
+	struct server_local *local = container_of(task, struct server_local, task);
+
+	assert_return(task);
+
+	debug(DBG_PROXY, "task %p, local %p", task, local);
+	list_del(&local->list);
+	xfree(local);
+}
+
+void
+local_delete(struct server_local *local)
+{
+	assert_return(local);
+
+	uring_task_destroy(&local->task);
+}
+
+struct server_local *
+local_new(struct server *server, struct saddr *saddr)
+{
+	struct server_local *local;
+
+	assert_return(server && saddr, NULL);
+
+	local = zmalloc(sizeof(*local));
+	if (!local) {
+		error("malloc: %m");
+		return NULL;
+	}
+
+	debug(DBG_PROXY, "%s adding local: %s", server->name, saddr->addrstr);
+	local->local = *saddr;
+	local->server = server;
+	uring_task_init(&local->task, "local", &server->task, local_free);
+	xfree(saddr);
+	return local;
+}
+
diff --git a/mcserverproxy/server-proxy.h b/mcserverproxy/server-proxy.h
new file mode 100644
index 0000000..ee3bda3
--- /dev/null
+++ b/mcserverproxy/server-proxy.h
@@ -0,0 +1,51 @@
+#ifndef fooserverproxyhfoo
+#define fooserverproxyhfoo
+
+struct server_proxy {
+	struct connection client_conn;
+	struct uring_task_buf clientbuf;
+	struct uring_task clienttask;
+	uint64_t client_bytes;
+	int cpipe[2];
+	int cfd;
+
+	struct connection server_conn;
+	struct uring_task_buf serverbuf;
+	struct uring_task servertask;
+	uint64_t server_bytes;
+	int spipe[2];
+	int sfd;
+	
+	bool connecting;
+	time_t begin;
+	struct ptimer_task ptask;
+	struct uring_task task;
+	struct server *server;
+	struct list_head list;
+};
+
+void proxy_refdump(struct server_proxy *proxy);
+
+void proxy_delete(struct server_proxy *proxy);
+
+struct server_proxy *proxy_new(struct server *server, struct saddr *client,
+			       int fd);
+
+struct server_local {
+	struct saddr local;
+	struct saddr client;
+	struct uring_task task;
+
+	struct server *server;
+	struct list_head list;
+};
+
+bool local_open(struct server_local *local);
+
+void local_refdump(struct server_local *local);
+
+void local_delete(struct server_local *local);
+
+struct server_local *local_new(struct server *server, struct saddr *saddr);
+
+#endif
diff --git a/mcserverproxy/server-rcon.c b/mcserverproxy/server-rcon.c
new file mode 100644
index 0000000..1f8ef70
--- /dev/null
+++ b/mcserverproxy/server-rcon.c
@@ -0,0 +1,227 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <errno.h>
+
+#include "main.h"
+#include "uring.h"
+#include "server.h"
+#include "server-rcon.h"
+#include "rcon-protocol.h"
+
+static int
+rcon_packet_complete(struct uring_task *task, int res)
+{
+	assert_return(task, -EINVAL);
+	assert_task_alive_or(DBG_RCON, task, return -EINTR);
+
+	return rcon_protocol_packet_complete(task->tbuf->buf, task->tbuf->len);
+}
+
+static bool
+rcon_check_reply(struct uring_task *task, int res, int32_t *id,
+		 int32_t *type, const char **msg)
+{
+	struct server *server = container_of(task, struct server, rcon_task);
+	const char *error;
+
+	if (res < 0) {
+		error("rcon(%s): reading reply failed, res: %i",
+		      server->name, res);
+		goto error;
+	}
+
+	if (!rcon_protocol_read_packet(task->tbuf->buf, task->tbuf->len,
+				       id, type, msg, &error)) {
+		error("rcon(%s): failed to parse packet: %s",
+		      server->name, error);
+		goto error;
+	}
+
+	return true;
+
+error:
+	uring_task_close_fd(task);
+	return false;
+}
+
+static void
+rcon_stop_reply(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, rcon_task);
+	int32_t id;
+	int32_t type;
+	const char *msg;
+
+	assert_return(task);
+	assert_task_alive(DBG_RCON, task);
+
+	if (!rcon_check_reply(task, res, &id, &type, &msg))
+		return;
+
+	if (id != 2) {
+		error("rcon(%s): stop cmd failed, reply id (%" PRIi32 ")",
+		      server->name, id);
+		goto out;
+	} else if (type != RCON_PACKET_RESPONSE) {
+		error("rcon(%s): stop cmd failed, reply type (%" PRIi32 ")",
+		      server->name, type);
+		goto out;
+	}
+
+	verbose("rcon(%s): stop command sent, reply: %s", server->name, msg);
+
+out:
+	uring_task_close_fd(task);
+}
+
+static void
+rcon_stop_sent(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, rcon_task);
+
+	assert_return(task);
+	assert_task_alive(DBG_RCON, task);
+
+	if (res != task->tbuf->len) {
+		error("rcon(%s): sending stop cmd failed, res: %i",
+		      server->name, res);
+		uring_task_close_fd(task);
+		return;
+	}
+
+	debug(DBG_RCON, "rcon(%s): stop cmd sent", server->name);
+	uring_tbuf_read_until(task, rcon_packet_complete, rcon_stop_reply);
+}
+
+static void
+rcon_login_reply(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, rcon_task);
+	int32_t id;
+	int32_t type;
+	const char *msg;
+
+	assert_return(task);
+	assert_task_alive(DBG_RCON, task);
+
+	if (!rcon_check_reply(task, res, &id, &type, &msg))
+		return;
+
+	if (id != 1) {
+		error("rcon(%s): login failed, reply id (%" PRIi32 ")",
+		      server->name, id);
+		goto error;
+	} else if (type == RCON_PACKET_LOGIN_FAIL) {
+		error("rcon(%s): login failed, incorrect password",
+		      server->name);
+		goto error;
+	} else if (type != RCON_PACKET_LOGIN_OK) {
+		error("rcon(%s): login failed, reply type (%" PRIi32 ")",
+		      server->name, type);
+		goto error;
+	}
+
+	debug(DBG_RCON, "rcon(%s): login successful", server->name);
+	rcon_protocol_create_packet(task->tbuf->buf, sizeof(task->tbuf->buf),
+				    &task->tbuf->len, 2, RCON_PACKET_COMMAND,
+				    "stop");
+	uring_tbuf_write(task, rcon_stop_sent);
+	return;
+
+error:
+	uring_task_close_fd(task);
+}
+
+static void
+rcon_login_sent(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, rcon_task);
+
+	assert_return(task);
+	assert_task_alive(DBG_RCON, task);
+
+	if (res != task->tbuf->len) {
+		error("rcon(%s): sending login failed, res: %i",
+		      server->name, res);
+		uring_task_close_fd(task);
+		return;
+	}
+
+	debug(DBG_RCON, "rcon(%s): login sent", server->name);
+	uring_tbuf_read_until(task, rcon_packet_complete, rcon_login_reply);
+}
+
+static void
+rcon_connected_cb(struct connection *conn, bool connected)
+{
+	struct server *server = container_of(conn, struct server, rcon_conn);
+
+	assert_return(conn);
+	assert_task_alive(DBG_RCON, &server->rcon_task);
+
+	if (!connected) {
+		error("rcon (%s): connection failed", server->name);
+		return;
+	}
+
+	rcon_protocol_create_packet(server->rcon_tbuf.buf,
+				    sizeof(server->rcon_tbuf.buf),
+				    &server->rcon_tbuf.len, 1,
+				    RCON_PACKET_LOGIN,
+				    server->rcon_password);
+	uring_tbuf_write(&server->rcon_task, rcon_login_sent);
+}
+
+static void
+rcon_free(struct uring_task *task)
+{
+	struct server *server = container_of(task, struct server, rcon_task);
+
+	assert_return(task);
+
+	debug(DBG_RCON, "task %p, server %s (%p)", task, server->name, server);
+}
+
+void
+rcon_stop(struct server *server)
+{
+	assert_return(server && !list_empty(&server->rcons) && !empty_str(server->rcon_password));
+	assert_task_alive(DBG_RCON, &server->rcon_task);
+
+	connect_any(&server->rcon_task, &server->rcons, &server->rcon_conn, rcon_connected_cb);
+}
+
+void
+rcon_refdump(struct server *server)
+{
+	assert_return(server);
+
+	uring_task_refdump(&server->rcon_task);
+}
+
+void
+rcon_delete(struct server *server)
+{
+	assert_return(server);
+
+	debug(DBG_RCON, "closing fd %i", server->rcon_task.fd);
+	uring_task_destroy(&server->rcon_task);
+}
+
+void
+rcon_init(struct server *server)
+{
+	assert_return(server);
+
+	uring_task_init(&server->rcon_task, "rcon", &server->task, rcon_free);
+	uring_task_set_buf(&server->rcon_task, &server->rcon_tbuf);
+}
+
diff --git a/mcserverproxy/server-rcon.h b/mcserverproxy/server-rcon.h
new file mode 100644
index 0000000..6625f25
--- /dev/null
+++ b/mcserverproxy/server-rcon.h
@@ -0,0 +1,12 @@
+#ifndef fooserverrconhfoo
+#define fooserverrconhfoo
+
+void rcon_stop(struct server *server);
+
+void rcon_refdump(struct server *server);
+
+void rcon_delete(struct server *server);
+
+void rcon_init(struct server *server);
+
+#endif
diff --git a/mcserverproxy/server.c b/mcserverproxy/server.c
new file mode 100644
index 0000000..de42721
--- /dev/null
+++ b/mcserverproxy/server.c
@@ -0,0 +1,837 @@
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sched.h>
+#include <poll.h>
+#include <errno.h>
+#include <sched.h>
+
+#include "main.h"
+#include "uring.h"
+#include "ptimer.h"
+#include "server.h"
+#include "server-proxy.h"
+#include "server-rcon.h"
+#include "utils.h"
+#include "config-parser.h"
+#include "idle.h"
+#include "systemd.h"
+
+static bool
+set_property(struct server *server, char **property, const char *value)
+{
+	assert_return(server && !*property && !empty_str(value), false);
+
+	*property = xstrdup(value);
+	if (!*property) {
+		error("strdup: %m");
+		return false;
+	}
+
+	return true;
+}
+
+void
+server_refdump(struct server *server)
+{
+	struct server_local *local;
+	struct server_proxy *proxy;
+
+	assert_return(server);
+
+	uring_task_refdump(&server->task);
+	uring_task_refdump(&server->exec_task);
+	uring_task_refdump(&server->ann_task);
+	uring_task_refdump(&server->idle_task);
+	list_for_each_entry(local, &server->locals, list)
+		local_refdump(local);
+	list_for_each_entry(proxy, &server->proxys, list)
+		proxy_refdump(proxy);
+	rcon_refdump(server);
+}
+
+static void
+server_free(struct uring_task *task)
+{
+	struct server *server = container_of(task, struct server, task);
+
+	assert_return(task);
+
+	debug(DBG_SRV, "freeing server %s (%p)", server->name, server);
+	list_del(&server->list);
+	xfree(server->pretty_name);
+	xfree(server->start_exec);
+	xfree(server->stop_exec);
+	xfree(server->systemd_service);
+	xfree(server->systemd_obj);
+	xfree(server->rcon_password);
+	xfree(server->name);
+	xfree(server);
+}
+
+void
+server_delete(struct server *server)
+{
+	struct server_local *local, *ltmp;
+	struct server_proxy *proxy, *ptmp;
+	struct saddr *remote;
+	struct saddr *rcon;
+	struct saddr *tmp;
+	struct dns_async *dns, *dtmp;
+
+	assert_return(server);
+
+	verbose("Removing server %s", server->name);
+	server->state = SERVER_STATE_DEAD;
+
+	rcon_delete(server);
+
+	list_for_each_entry_safe(local, ltmp, &server->locals, list)
+		local_delete(local);
+
+	list_for_each_entry_safe(proxy, ptmp, &server->proxys, list)
+		proxy_delete(proxy);
+
+	list_for_each_entry_safe(rcon, tmp, &server->rcons, list) {
+		list_del(&rcon->list);
+		xfree(rcon);
+	}
+
+	list_for_each_entry_safe(remote, tmp, &server->remotes, list) {
+		list_del(&remote->list);
+		xfree(remote);
+	}
+
+	list_for_each_entry_safe(dns, dtmp, &server->dnslookups, list)
+		gai_cancel(&dns->gcb);
+		
+	uring_task_destroy(&server->idle_task);
+	uring_poll_cancel(&server->exec_task);
+	uring_task_put(&server->exec_task);
+	uring_task_destroy(&server->task);
+	uring_task_put(&server->ann_task);
+}
+
+void
+server_delete_by_name(const char *name)
+{
+	struct server *server;
+
+	assert_return(!empty_str(name));
+
+	list_for_each_entry(server, &cfg->servers, list) {
+		if (streq(server->name, name)) {
+			server_delete(server);
+			return;
+		}
+	}
+}
+
+static void
+server_dump(struct server *server)
+{
+	struct server_local *local;
+	struct saddr *remote;
+	struct saddr *rcon;
+
+	assert_return(server);
+
+	verbose("Server %s:", server->name);
+	switch (server->type) {
+	case SERVER_TYPE_ANNOUNCE:
+		verbose("  * Type: announce");
+		break;
+	case SERVER_TYPE_PROXY:
+		verbose("  * Type: proxy");
+		break;
+	default:
+		verbose("  * Type: unknown");
+		break;
+	}
+	verbose("  * Name: %s", server->pretty_name ? server->pretty_name : "<undefined>");
+	verbose("  * Announce port: %" PRIu16, server->announce_port); 
+
+	if (!list_empty(&server->locals)) {
+		verbose("  * Local:");
+		list_for_each_entry(local, &server->locals, list)
+			verbose("    * %s", local->local.addrstr);
+	}
+
+	if (!list_empty(&server->remotes)) {
+		verbose("  * Remote:");
+		list_for_each_entry(remote, &server->remotes, list)
+			verbose("    * %s", remote->addrstr);
+	}
+
+	if (!list_empty(&server->rcons)) {
+		verbose("  * RCon:");
+		list_for_each_entry(rcon, &server->rcons, list)
+			verbose("    * %s", rcon->addrstr);
+	}
+
+	verbose("");
+}
+
+static void
+server_exec_free(struct uring_task *task)
+{
+	assert_return(task);
+
+	debug(DBG_SRV, "called");
+}
+
+#ifndef P_PIDFD
+#define P_PIDFD 3
+#endif
+
+/* FIXME: update states */
+static void
+server_exec_done(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, exec_task);
+	int r;
+	siginfo_t info;
+
+	assert_return(task);
+	assert_task_alive_or(DBG_SRV, task, goto out);
+	/* Should we leave child processes running? */
+
+	if (!(res & POLLIN)) {
+		error("unexpected result: %i", res);
+		goto out;
+	}
+
+	r = waitid(P_PIDFD, server->exec_task.fd, &info, WEXITED);
+        if (r < 0) {
+                error("waitid: %m");
+		goto out;
+        }
+
+	if (info.si_status == 0)
+		debug(DBG_SRV, "command successfully executed");
+	else
+		error("command failed: %i", info.si_status);
+
+out:
+	uring_task_close_fd(&server->exec_task);
+}
+
+static int
+server_exec_child(void *ptr)
+{
+	const char *cmd = ptr;
+
+	assert_return(ptr, EINVAL);
+
+	execl(cmd, cmd, NULL);
+	return errno;
+}
+
+#ifndef CLONE_PIDFD
+#define CLONE_PIDFD 0x00001000
+#endif
+
+static bool
+server_exec(struct server *server, const char *cmd)
+{
+	char stack[4096]; /* Beautiful/horrible hack :) */
+	int pidfd;
+	int r;
+
+	assert_return(server && cmd && server->exec_task.fd < 1, false);
+
+        r = clone(server_exec_child, stack + sizeof(stack),
+                  CLONE_VM | CLONE_VFORK | CLONE_PIDFD | SIGCHLD,
+                  (void *)cmd, &pidfd);
+	if (r < 0) {
+		error("clone: %m: %i", r);
+		return false;
+	}
+
+	uring_task_set_fd(&server->exec_task, pidfd);
+	uring_poll(&server->exec_task, POLLIN, server_exec_done);
+	return true;
+}
+
+static bool
+server_check_running(struct server *server)
+{
+	assert_return(server, false);
+
+	/* FIXME: other methods, rcon? */
+	if (server->systemd_service) {
+		verbose("%s: checking if systemd service is running", server->name);
+		if (systemd_service_running(server)) {
+			server->state = SERVER_STATE_RUNNING;
+			return true;
+		} else {
+			server->state = SERVER_STATE_STOPPED;
+			return false;
+		}
+	}
+
+	return false;
+}
+
+bool
+server_start(struct server *server)
+{
+	assert_return(server, false);
+	assert_task_alive_or(DBG_SRV, &server->task, return false);
+
+	switch (server->start_method) {
+
+	case SERVER_START_METHOD_EXEC:
+		verbose("Starting server %s via external cmd", server->name);
+		return server_exec(server, server->start_exec);
+
+	case SERVER_START_METHOD_SYSTEMD:
+		verbose("Starting server %s via systemd (%s)",
+			server->name, server->systemd_service);
+
+		if (systemd_service_start(server)) {
+			server->state = SERVER_STATE_RUNNING;
+			return true;
+		} else
+			return server_check_running(server);
+
+	case SERVER_START_METHOD_UNDEFINED:
+	default:
+		break;
+	}
+
+	return false;
+}
+
+bool
+server_stop(struct server *server)
+{
+	assert_return(server, false);
+	assert_task_alive_or(DBG_SRV, &server->task, return false);
+
+	switch (server->stop_method) {
+
+	case SERVER_STOP_METHOD_EXEC:
+		verbose("Stopping server %s via external cmd", server->name);
+		return server_exec(server, server->stop_exec);
+
+	case SERVER_STOP_METHOD_SYSTEMD:
+		verbose("Stopping server %s via systemd (%s)",
+			server->name, server->systemd_service);
+		if (systemd_service_stop(server)) {
+			server->state = SERVER_STATE_STOPPED;
+			return true;
+		} else
+			return server_check_running(server);
+
+	case SERVER_STOP_METHOD_RCON:
+		verbose("Stopping server %s via rcon", server->name);
+		rcon_stop(server);
+		return true;
+
+	case SERVER_STOP_METHOD_UNDEFINED:
+	default:
+		break;
+	}
+
+	return false;
+}
+
+static void
+server_idle_free(struct uring_task *task)
+{
+	assert_return(task);
+
+	debug(DBG_ANN, "called");
+}
+
+void
+server_set_active_players(struct server *server, int count)
+{
+	assert_return(server);
+	assert_task_alive(DBG_IDLE, &server->idle_task);
+
+	debug(DBG_IDLE, "%s: currently %i active players",
+	      server->name, count);
+
+	if (count < 0)
+		return;
+
+	server->state = SERVER_STATE_RUNNING;
+	if (count > 0)
+		server->idle_count = 0;
+	else if (count == 0)
+		server->idle_count++;
+
+	if (server->idle_count > server->idle_timeout) {
+		verbose("stopping idle server %s", server->name);
+		server_stop(server); 
+	}
+}
+
+static void
+server_idle_connected_cb(struct connection *conn, bool connected)
+{
+	struct server *server = container_of(conn, struct server, idle_conn);
+
+	assert_return(conn);
+	assert_task_alive(DBG_IDLE, &server->idle_task);
+
+	if (!connected) {
+		debug(DBG_IDLE,
+		      "idle check connection to remote server (%s) failed",
+		      server->name);
+		server->idle_count = 0;
+		server->state = SERVER_STATE_STOPPED;
+		return;
+	}
+
+	debug(DBG_IDLE, "connected to remote %s\n", conn->remote.addrstr);
+	idle_check_get_player_count(server, conn);
+}
+
+bool
+server_idle_check(struct server *server)
+{
+	assert_return(server, false);
+
+	if (server->state == SERVER_STATE_INIT ||
+	    server->state == SERVER_STATE_DEAD)
+		return false;
+
+	if (server->idle_timeout < 1)
+		return false;
+
+	if (list_empty(&server->remotes))
+		return false;
+
+	if (!list_empty(&server->proxys)) {
+		server->idle_count = 0;
+		return true;
+	}
+
+	connect_any(&server->idle_task, &server->remotes,
+		    &server->idle_conn, server_idle_connected_cb);
+	return true;
+}
+
+static void
+server_announce_free(struct uring_task *task)
+{
+	assert_return(task);
+
+	debug(DBG_ANN, "called");
+}
+
+static void
+server_announce_cb(struct uring_task *task, int res)
+{
+	struct server *server = container_of(task, struct server, ann_task);
+
+	assert_return(task);
+
+	if (res < 0)
+		error("%s: failure %i", server->name, res);
+	else if (res == server->ann_buf.len)
+		debug(DBG_ANN, "%s: ok (%i)", server->name, res);
+	else
+		debug(DBG_ANN, "%s: unexpected result: %i", server->name, res);
+
+	uring_task_set_fd(&server->ann_task, -1);
+}
+
+bool
+server_announce(struct server *server, int fd)
+{
+	assert_return(server && fd >= 0, false);
+
+	if (server->state == SERVER_STATE_INIT ||
+	    server->state == SERVER_STATE_DEAD)
+		return false;
+
+	debug(DBG_ANN, "announcing server: %s", server->name);
+	uring_task_set_fd(&server->ann_task, fd);
+	uring_tbuf_sendmsg(&server->ann_task, server_announce_cb);
+	return true;
+}
+
+bool
+server_commit(struct server *server)
+{
+	struct server_local *local;
+	uint16_t port;
+	int r;
+
+	assert_return(server && server->name, false);
+	assert_task_alive_or(DBG_SRV, &server->task, return false);
+
+	if (server->state != SERVER_STATE_INIT) {
+		error("called in wrong state");
+		return false;
+	}
+
+	if (!list_empty(&server->proxys)) {
+		error("%s: proxys not empty?", server->name);
+		return false;
+	}
+
+	if (!list_empty(&server->dnslookups)) {
+		debug(DBG_SRV, "called with pending DNS requests");
+		return true;
+	}
+
+	if (server->stop_method == SERVER_STOP_METHOD_RCON &&
+	    list_empty(&server->rcons)) {
+		error("%s: rcon stop method missing rcon address",
+		      server->name); 
+		return false;
+	}
+
+	if (server->stop_method == SERVER_STOP_METHOD_RCON &&
+	    !server->rcon_password) {
+		error("%s: rcon stop method missing rcon password",
+		      server->name); 
+		return false;
+	}
+
+	if ((server->start_method == SERVER_START_METHOD_SYSTEMD ||
+	     server->stop_method == SERVER_STOP_METHOD_SYSTEMD) &&
+	    !server->systemd_service) {
+		error("%s: systemd start/stop method missing systemd service",
+		      server->name); 
+		return false;
+	}
+
+	if (server->systemd_service && !server->systemd_obj) {
+		server->systemd_obj = systemd_object_path(server->systemd_service);
+		if (!server->systemd_obj) {
+			error("%s: failed to create systemd object path (%s)",
+			      server->name, server->systemd_service);
+			return false;
+		}
+	}
+
+	if (server->idle_timeout > 0 &&
+	    server->stop_method == SERVER_STOP_METHOD_UNDEFINED) {
+		error("%s: idle_timeout set but missing stop method", server->name); 
+		return false;
+	}
+
+	switch (server->type) {
+	case SERVER_TYPE_ANNOUNCE:
+		if (server->announce_port < 1) {
+			error("%s: missing announce port", server->name); 
+			return false;
+		}
+
+		if (server->start_method != SERVER_START_METHOD_UNDEFINED) {
+			error("%s: can't set start_method for announce server", server->name);
+			return false;
+		}
+
+		if (!list_empty(&server->locals)) {
+			error("%s: can't set local addresses for announce server", server->name);
+			return false;
+		}
+
+		if (!list_empty(&server->remotes)) {
+			error("%s: can't set remote addresses for announce server", server->name);
+			return false;
+		}
+
+		break;
+
+	case SERVER_TYPE_PROXY:
+		if (server->announce_port >= 1) {
+			error("%s: can't set announce port for proxy server", server->name); 
+			return false;
+		}
+
+		if (list_empty(&server->locals)) {
+			error("%s: missing local addresses for proxy server", server->name);
+			return false;
+		}
+
+		if (list_empty(&server->remotes)) {
+			error("%s: missing remote addresses for proxy server", server->name);
+			return false;
+		}
+
+		list_for_each_entry(local, &server->locals, list) {
+			port = saddr_port(&local->local);
+
+			if (port == 0) {
+				error("%s: invalid local port", server->name);
+				return false;
+			}
+
+			if (server->announce_port < 1)
+				server->announce_port = port;
+
+			if (server->announce_port != port) {
+				error("%s: multiple local ports", server->name);
+				return false;
+			}
+		}
+
+		if (server->announce_port < 1) {
+			error("%s: can't determine which port to announce", server->name);
+			return false;
+		}
+
+		break;
+
+	default:
+		error("%s: can't determine server type", server->name);
+		return false;
+	}
+
+	if (!server->pretty_name) {
+		char *suffix;
+		
+		suffix = strrchr(server->name, '.');
+		if (!suffix || suffix == server->name) {
+			error("invalid server name: %s", server->name);
+			return false;
+		}
+
+		server->pretty_name = xstrndup(server->name, suffix - server->name);
+		if (!server->pretty_name) {
+			error("failed to create display name: %s", server->name);
+			return false;
+		}
+	}
+
+	r = snprintf(server->ann_buf.buf, sizeof(server->ann_buf.buf),
+		     "[MOTD]%s[/MOTD][AD]%" PRIu16 "[/AD]",
+		     server->pretty_name, server->announce_port);
+	if (r < 1 || r >= sizeof(server->ann_buf.buf)) {
+		error("%s: unable to create announce msg: %i\n", server->name, r);
+		return false;
+	}
+	server->ann_buf.len = r;
+
+	/* FIXME: config, dont reread config if server running, make sure fd is available before this is called */
+	server_dump(server);
+
+	list_for_each_entry(local, &server->locals, list)
+		local_open(local);
+
+	server->state = SERVER_STATE_CFG_OK;
+
+	server_check_running(server);
+
+	debug(DBG_SRV, "success");
+	return true;
+}
+
+bool
+server_add_remote(struct server *server, struct saddr *remote)
+{
+	assert_return(server && remote, false);
+	assert_task_alive_or(DBG_SRV, &server->task, return false);
+
+	debug(DBG_SRV, "adding remote: %s", remote->addrstr);
+	list_add(&remote->list, &server->remotes);
+	return true;
+}
+
+bool
+server_add_local(struct server *server, struct saddr *saddr)
+{
+	struct server_local *local;
+
+	assert_return(server && saddr, false);
+	assert_task_alive_or(DBG_SRV, &server->task, return false);
+
+	local = local_new(server, saddr);
+	if (!local)
+		return false;
+
+	list_add(&local->list, &server->locals);
+	return true;
+}
+
+bool
+server_add_rcon(struct server *server, struct saddr *rcon)
+{
+	assert_return(server && rcon, false);
+	assert_task_alive_or(DBG_SRV, &server->task, return false);
+
+	debug(DBG_SRV, "adding rcon: %s", rcon->addrstr);
+	list_add(&rcon->list, &server->rcons);
+	return true;
+}
+
+bool
+server_set_rcon_password(struct server *server, const char *password)
+{
+	assert_return(server && !empty_str(password), false);
+
+	return set_property(server, &server->rcon_password, password);
+}
+
+bool
+server_set_systemd_service(struct server *server, const char *service)
+{
+	const char *suffix;
+	char *tmp;
+
+	assert_return(server && !empty_str(service) && !server->systemd_service, false);
+
+	suffix = strrchr(service, '.');
+	if (!suffix || !streq(suffix, ".service")) {
+		tmp = zmalloc(strlen(service) + strlen(".service") + 1);
+		if (tmp)
+			sprintf(tmp, "%s.service", service);
+	} else
+		tmp = xstrdup(service);
+
+	if (!tmp) {
+		error("malloc/strdup: %m");
+		return false;
+	}
+
+	server->systemd_service = tmp;
+	return true;
+}
+
+bool
+server_set_stop_method(struct server *server,
+		       enum server_stop_method stop_method)
+{
+	assert_return(server->stop_method == SERVER_STOP_METHOD_UNDEFINED &&
+		      stop_method != SERVER_STOP_METHOD_UNDEFINED, false);
+
+	server->stop_method = stop_method;
+	return true;
+}
+
+bool
+server_set_start_method(struct server *server,
+			enum server_start_method start_method)
+{
+	assert_return(server->start_method == SERVER_START_METHOD_UNDEFINED &&
+		      start_method != SERVER_START_METHOD_UNDEFINED, false);
+
+	server->start_method = start_method;
+	return true;
+}
+
+bool
+server_set_stop_exec(struct server *server, const char *cmd)
+{
+	assert_return(server && !empty_str(cmd), false);
+
+	return set_property(server, &server->stop_exec, cmd);
+}
+
+bool
+server_set_start_exec(struct server *server, const char *cmd)
+{
+	assert_return(server && !empty_str(cmd), false);
+
+	return set_property(server, &server->start_exec, cmd);
+}
+
+bool
+server_set_idle_timeout(struct server *server, uint16_t timeout)
+{
+	assert_return(server && timeout > 0 && server->idle_timeout == 0, false);
+
+	server->idle_timeout = timeout;
+	return true;
+}
+
+bool
+server_set_port(struct server *server, uint16_t port)
+{
+	assert_return(server && port > 0 && server->announce_port == 0, false);
+
+	server->announce_port = htons(port);
+	return true;
+}
+
+bool
+server_set_type(struct server *server, enum server_type type)
+{
+	assert_return(server && type != SERVER_TYPE_UNDEFINED, false);
+
+	switch (type) {
+	case SERVER_TYPE_ANNOUNCE:
+		server->type = SERVER_TYPE_ANNOUNCE;
+		break;
+	case SERVER_TYPE_PROXY:
+		server->type = SERVER_TYPE_PROXY;
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+bool
+server_set_pretty_name(struct server *server, const char *pretty_name)
+{
+	assert_return(server && !empty_str(pretty_name), false);
+
+	return set_property(server, &server->pretty_name, pretty_name);
+}
+
+struct server *
+server_new(const char *name)
+{
+	struct server *server;
+
+	assert_return(!empty_str(name), NULL);
+
+	list_for_each_entry(server, &cfg->servers, list) {
+		if (!streq(name, server->name))
+			continue;
+		error("attempt to add duplicate server: %s", name);
+		return server;
+	}
+
+	verbose("Adding server %s", name);
+	server = zmalloc(sizeof(*server));
+	if (!server) {
+		error("malloc: %m");
+		return NULL;
+	}
+
+	server->state = SERVER_STATE_INIT;
+	server->type = SERVER_TYPE_UNDEFINED;
+	server->name = xstrdup(name);
+	server->stop_method = SERVER_STOP_METHOD_UNDEFINED;
+	server->start_method = SERVER_START_METHOD_UNDEFINED;
+	server->idle_timeout = 0;
+
+	uring_task_init(&server->task, server->name, uring_parent(), server_free);
+	uring_task_set_buf(&server->task, &server->tbuf);
+
+	uring_task_init(&server->ann_task, "announce", &server->task, server_announce_free);
+	uring_task_set_buf(&server->ann_task, &server->ann_buf);
+	saddr_set_ipv4(&server->ann_task.saddr, cinet_addr(224,0,2,60), htons(4445));
+
+	uring_task_init(&server->exec_task, "exec", &server->task, server_exec_free);
+
+	uring_task_init(&server->idle_task, "idle", &server->task, server_idle_free);
+	uring_task_set_buf(&server->idle_task, &server->idle_buf);
+
+	rcon_init(server);
+
+	list_init(&server->remotes);
+	list_init(&server->locals);
+	list_init(&server->proxys);
+	list_init(&server->rcons);
+	list_init(&server->dnslookups);
+	list_add(&server->list, &cfg->servers);
+
+	return server;
+}
diff --git a/mcserverproxy/server.h b/mcserverproxy/server.h
new file mode 100644
index 0000000..ff4c28e
--- /dev/null
+++ b/mcserverproxy/server.h
@@ -0,0 +1,128 @@
+#ifndef fooserverhfoo
+#define fooserverhfoo
+
+enum server_state {
+	SERVER_STATE_INIT	= 0,
+	SERVER_STATE_CFG_OK	= 1,
+	SERVER_STATE_RUNNING	= 2,
+	SERVER_STATE_STOPPED	= 3,
+	SERVER_STATE_DEAD	= 4,
+};
+
+enum server_type {
+	SERVER_TYPE_UNDEFINED,
+	SERVER_TYPE_ANNOUNCE,
+	SERVER_TYPE_PROXY,
+};
+
+enum server_stop_method {
+	SERVER_STOP_METHOD_UNDEFINED,
+	SERVER_STOP_METHOD_RCON,
+	SERVER_STOP_METHOD_SYSTEMD,
+	SERVER_STOP_METHOD_EXEC,
+};
+
+enum server_start_method {
+	SERVER_START_METHOD_UNDEFINED,
+	SERVER_START_METHOD_SYSTEMD,
+	SERVER_START_METHOD_EXEC,
+};
+
+struct server {
+	enum server_type type;
+	char *name;
+	char *pretty_name;
+	uint16_t announce_port;
+	struct list_head locals;
+	struct list_head remotes;
+	struct list_head proxys;
+	struct list_head rcons;
+	struct list_head dnslookups;
+	enum server_state state;
+	
+	enum server_stop_method stop_method;
+	enum server_start_method start_method;
+
+	/* For calling external start/stop executables */
+	char *stop_exec;
+	char *start_exec;
+	struct uring_task exec_task;
+
+	/* For systemd services */
+	char *systemd_service;
+	char *systemd_obj;
+
+	/* For rcon connections */
+	char *rcon_password;
+	struct connection rcon_conn;
+	struct uring_task rcon_task;
+	struct uring_task_buf rcon_tbuf;
+
+	/* For announce messages */
+	struct uring_task ann_task;
+	struct uring_task_buf ann_buf;
+
+	/* For checking idle status */
+	struct uring_task idle_task;
+	struct connection idle_conn;
+	struct uring_task_buf idle_buf;
+	unsigned idle_timeout;
+	unsigned idle_count;
+
+	/* For reading config files */
+	struct uring_task task;
+	struct uring_task_buf tbuf;
+
+	struct list_head list;
+};
+
+void server_refdump(struct server *server);
+
+void server_delete(struct server *server);
+
+void server_delete_by_name(const char *name);
+
+bool server_start(struct server *server);
+
+bool server_stop(struct server *server);
+
+void server_set_active_players(struct server *server, int count);
+
+bool server_idle_check(struct server *server);
+
+bool server_announce(struct server *server, int fd);
+
+bool server_commit(struct server *server);
+
+bool server_add_remote(struct server *server, struct saddr *remote);
+
+bool server_add_local(struct server *server, struct saddr *saddr);
+
+bool server_add_rcon(struct server *server, struct saddr *rcon);
+
+bool server_set_rcon_password(struct server *server, const char *password);
+
+bool server_set_systemd_service(struct server *server, const char *service);
+
+bool server_set_stop_method(struct server *server,
+			    enum server_stop_method stop_method);
+
+bool server_set_start_method(struct server *server,
+			     enum server_start_method start_method);
+
+bool server_set_stop_exec(struct server *server, const char *cmd);
+
+bool server_set_start_exec(struct server *server, const char *cmd);
+
+bool server_set_idle_timeout(struct server *server, uint16_t timeout);
+
+bool server_set_port(struct server *server, uint16_t port);
+
+bool server_set_type(struct server *server, enum server_type type);
+
+bool server_set_pretty_name(struct server *server, const char *pretty_name);
+
+struct server *server_new(const char *name);
+
+#endif
+
diff --git a/mcserverproxy/signal-handler.c b/mcserverproxy/signal-handler.c
new file mode 100644
index 0000000..67c2e0b
--- /dev/null
+++ b/mcserverproxy/signal-handler.c
@@ -0,0 +1,195 @@
+#define _GNU_SOURCE
+#include <sys/signalfd.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <systemd/sd-daemon.h>
+
+#include "main.h"
+#include "signal-handler.h"
+#include "uring.h"
+#include "server.h"
+#include "server-config.h"
+#include "config-parser.h"
+#include "igmp.h"
+#include "announce.h"
+#include "idle.h"
+#include "ptimer.h"
+
+struct signal_ev {
+	struct uring_task task;
+	struct uring_task_buf tbuf;
+	int pipe[2];
+};
+
+static void
+signal_delete()
+{
+	assert_return(cfg->signal);
+
+	uring_task_destroy(&cfg->signal->task);
+}
+
+static void
+signalfd_read(struct uring_task *task, int res)
+{
+	struct signal_ev *signal = container_of(task, struct signal_ev, task);
+	struct server *server, *stmp;
+	static unsigned count = 0;
+	siginfo_t *si;
+
+	assert_return(task);
+	assert_task_alive(DBG_SIG, task);
+
+	si = (siginfo_t *)task->tbuf->buf;
+	if (res != sizeof(*si))
+		die("error in signalfd (%i)", res);
+
+	switch (si->si_signo) {
+	case SIGUSR1: {
+		struct dns_async *dns;
+
+		debug(DBG_SIG, "Got a SIGUSR1");
+		if (si->si_code != SI_ASYNCNL || !si->si_ptr) {
+			error("SIGUSR1: unexpected values in siginfo");
+			goto out;
+		}
+
+		dns = si->si_ptr;
+		if (!dns->cb) {
+			error("DNS callback not set");
+			goto out;
+		}
+
+		debug(DBG_DNS, "DNS lookup complete, dns: %p, dns->cb: %p",
+		      dns, dns->cb);
+		dns->cb(dns);
+		break;
+	}
+
+	case SIGUSR2:
+		debug(DBG_SIG, "got a SIGUSR2");
+		dump_tree();
+		break;
+
+	case SIGTERM:
+		debug(DBG_SIG, "Got a SIGINT/SIGHUP");
+		verbose("got a signal to quit");
+		sd_notifyf(0, "STOPPING=1\nSTATUS=Received signal, exiting");
+		exit(EXIT_SUCCESS);
+		break;
+
+	case SIGINT:
+	case SIGHUP:
+		count++;
+		if (count > 5) {
+			dump_tree();
+			exit(EXIT_FAILURE);
+		}
+
+		verbose("got a signal to dump tree");
+		sd_notifyf(0, "STOPPING=1\nSTATUS=Received signal, exiting");
+		dump_tree();
+		signal_delete();
+		ptimer_delete();
+		igmp_delete();
+		announce_delete();
+		idle_delete();
+		server_cfg_monitor_delete();
+		list_for_each_entry_safe(server, stmp, &cfg->servers, list)
+			server_delete(server);
+		uring_delete();
+		return;
+
+	default:
+		error("got an unknown signal: %i", si->si_signo);
+		break;
+	}
+
+out:
+	uring_tbuf_read(&signal->task, signalfd_read);
+}
+
+static void
+hack_signal_handler(int signum, siginfo_t *si, void *ucontext)
+{
+	ssize_t r;
+
+	assert_return(signum > 0 && si);
+
+	r = write(cfg->signal->pipe[PIPE_WR], si, sizeof(*si));
+	if (r != sizeof(*si))
+		error("write: %zi\n", r);
+
+}
+
+static void
+signal_free(struct uring_task *task)
+{
+	struct signal_ev *signal = container_of(task, struct signal_ev, task);
+
+	assert_return(task);
+
+	debug(DBG_SIG, "called");
+	close(signal->pipe[PIPE_WR]);
+	cfg->signal = NULL;
+	xfree(signal);
+}
+
+void
+signal_refdump()
+{
+	assert_return(cfg->signal);
+
+	uring_task_refdump(&cfg->signal->task);
+}
+
+void
+signal_init()
+{
+	//sigset_t mask;
+	struct signal_ev *signal;
+
+	assert_return(!cfg->signal);
+
+	signal = zmalloc(sizeof(*signal));
+	if (!signal)
+		die("malloc: %m");
+
+	if (pipe2(signal->pipe, O_CLOEXEC) < 0)
+		die("pipe2: %m");
+
+	/*
+	sigfillset(&mask);
+	if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0)
+		die("sigprocmask: %m");
+
+	sfd = signalfd(-1, &mask, SFD_CLOEXEC);
+	if (sfd < 0)
+		die("signalfd: %m");
+	*/
+
+	struct sigaction action;
+	sigfillset(&action.sa_mask);
+	action.sa_sigaction = hack_signal_handler;
+	action.sa_flags = SA_SIGINFO;
+
+	sigaction(SIGINT, &action, NULL);
+	sigaction(SIGHUP, &action, NULL);
+	sigaction(SIGTERM, &action, NULL);
+	sigaction(SIGUSR1, &action, NULL);
+	sigaction(SIGUSR2, &action, NULL);
+
+	action.sa_handler = SIG_IGN;
+	action.sa_flags = 0;
+	sigaction(SIGPIPE, &action, NULL);
+
+	debug(DBG_SIG, "using pipe fds %i -> %i",
+	      signal->pipe[PIPE_WR], signal->pipe[PIPE_RD]);
+	uring_task_init(&signal->task, "signal", uring_parent(), signal_free);
+	uring_task_set_fd(&signal->task, signal->pipe[PIPE_RD]);
+	uring_task_set_buf(&signal->task, &signal->tbuf);
+	cfg->signal = signal;
+	uring_tbuf_read(&signal->task, signalfd_read);
+}
+
diff --git a/mcserverproxy/signal-handler.h b/mcserverproxy/signal-handler.h
new file mode 100644
index 0000000..e0140b3
--- /dev/null
+++ b/mcserverproxy/signal-handler.h
@@ -0,0 +1,8 @@
+#ifndef foosignalhfoo
+#define foosignalhfoo
+
+void signal_refdump();
+
+void signal_init();
+
+#endif
diff --git a/mcserverproxy/systemd.c b/mcserverproxy/systemd.c
new file mode 100644
index 0000000..a44b0d8
--- /dev/null
+++ b/mcserverproxy/systemd.c
@@ -0,0 +1,219 @@
+#include <string.h>
+#include <stdlib.h>
+#include <systemd/sd-bus.h>
+
+#include "main.h"
+#include "server.h"
+#include "systemd.h"
+
+#define SYSTEMD_DBUS_SERVICE		"org.freedesktop.systemd1"
+#define SYSTEMD_DBUS_INTERFACE		"org.freedesktop.systemd1.Unit"
+#define SYSTEMD_DBUS_PATH_PREFIX	"/org/freedesktop/systemd1/unit/"
+
+static inline char
+tohex(uint8_t val)
+{
+	static const char hex[] = "0123456789abcdef";
+
+	return hex[val & 0x0f];
+}
+
+/*
+ * Creates an escaped D-Bus object path for a given systemd service
+ *
+ * Escaping rules are documented here:
+ * https://dbus.freedesktop.org/doc/dbus-specification.html
+ *
+ * Essentially, everyting but a-z, A-Z, 0-9 is replaced by _xx where xx is
+ * the hexadecimal value of the character.
+ *
+ * Example: minecraft@world1.service -> minecraft_40world1_2eservice
+ */
+char *
+systemd_object_path(const char *service)
+{
+	char *r;
+	char *d;
+	const char *s;
+
+	assert_return(service && !empty_str(service), NULL);
+
+	r = zmalloc(strlen(SYSTEMD_DBUS_PATH_PREFIX) + strlen(service) * 3 + 1);
+	if (!r)
+		return NULL;
+
+	memcpy(r, SYSTEMD_DBUS_PATH_PREFIX, strlen(SYSTEMD_DBUS_PATH_PREFIX));
+	d = r + strlen(SYSTEMD_DBUS_PATH_PREFIX);
+
+	for (s = service; *s; s++) {
+		if ((*s >= 'a' && *s <= 'z') ||
+		    (*s >= 'A' && *s <= 'Z') ||
+		    (*s >= '0' && *s <= '9')) {
+			*(d++) = *s;
+			continue;
+		}
+
+		*(d++) = '_';
+		*(d++) = tohex(*s >> 4);
+		*(d++) = tohex(*s);
+	}
+
+	*d = '\0';
+	return r;
+}
+
+void
+systemd_delete()
+{
+       	assert_return_silent(cfg->sd_bus);
+
+        sd_bus_unref(cfg->sd_bus);
+	cfg->sd_bus = NULL;
+}
+
+static sd_bus *
+get_bus()
+{
+	int r;
+
+	if (cfg->sd_bus_failed)
+		return NULL;
+
+	if (!cfg->sd_bus) {
+		r = sd_bus_open_user(&cfg->sd_bus);
+		if (r < 0) {
+			error("failed to connect to user system bus: %s", strerror(-r));
+			cfg->sd_bus_failed = true;
+			return NULL;
+		}
+	}
+
+	return cfg->sd_bus;
+}
+
+/*
+ * Check if a systemd service is running.
+ *
+ * This is equivalent to (assuming service minecraft@world1):
+ *   gdbus call --session 
+ *	--dest org.freedesktop.systemd1 
+ *	--object-path /org/freedesktop/systemd1/unit/minecraft_40world1_2eservice
+ *	--method org.freedesktop.DBus.Properties.Get
+ *		"org.freedesktop.systemd1.Unit" 
+ *		"ActiveState"
+ */
+bool
+systemd_service_running(struct server *server)
+{
+	sd_bus *bus = get_bus();
+        sd_bus_error error = SD_BUS_ERROR_NULL;
+	char *status = NULL;
+	bool running = false;
+	int r;
+
+	assert_return(server && bus && server->systemd_service && server->systemd_obj, false);
+
+	r = sd_bus_get_property_string(bus,
+				       SYSTEMD_DBUS_SERVICE,
+				       server->systemd_obj,
+				       SYSTEMD_DBUS_INTERFACE,
+				       "ActiveState",
+				       &error,
+				       &status);
+        if (r < 0) {
+                error("failed to get status for service %s (%s): %s",
+		      server->systemd_service, server->systemd_obj, error.message);
+		goto out;
+        }
+
+	if (streq(status, "active")) {
+		running = true;
+		debug(DBG_SYSD, "systemd service %s (%s) is active",
+		      server->systemd_service, server->systemd_obj);
+	} else
+		debug(DBG_SYSD, "systemd service %s (%s) is not active",
+		      server->systemd_service, server->systemd_obj);
+
+out:
+	free(status);
+        sd_bus_error_free(&error);
+	return running;
+}
+
+static bool
+systemd_service_action(struct server *server, const char *action)
+{
+        sd_bus_error error = SD_BUS_ERROR_NULL;
+        sd_bus_message *m = NULL;
+	sd_bus *bus = get_bus();
+	const char *path;
+	bool performed = false;
+	int r;
+
+	assert_return(server && bus && server->systemd_service && server->systemd_obj && action, false);
+
+        r = sd_bus_call_method(bus,
+			       SYSTEMD_DBUS_SERVICE,
+			       server->systemd_obj,
+			       SYSTEMD_DBUS_INTERFACE,
+			       action,
+			       &error,
+			       &m,
+			       "s",
+			       "fail");
+        if (r < 0) {
+                error("failed to perform action %s on systemd service %s: %s",
+		      action, server->systemd_service, error.message);
+		goto out;
+        }
+
+        r = sd_bus_message_read(m, "o", &path);
+        if (r < 0) {
+                error("failed to parse response message: %s", strerror(-r));
+		goto out;
+        }
+
+        verbose("action %s queued for service %s",
+		action, server->systemd_service);
+	performed = true;
+
+out:
+        sd_bus_error_free(&error);
+        sd_bus_message_unref(m);
+	return performed;
+}
+
+/*
+ * Stop systemd service.
+ *
+ * This is equivalent to (assuming service minecraft@world1):
+ *   gdbus call --session 
+ *	--dest org.freedesktop.systemd1 
+ *	--object-path /org/freedesktop/systemd1/unit/minecraft_40world1_2eservice
+ *	--method org.freedesktop.systemd1.Unit.Stop "fail"
+ */
+bool
+systemd_service_stop(struct server *server)
+{
+	assert_return(server, false);
+
+	return systemd_service_action(server, "Stop");
+}
+
+/*
+ * Start systemd service.
+ *
+ * This is equivalent to (assuming service minecraft@world1):
+ *   gdbus call --session 
+ *	--dest org.freedesktop.systemd1 
+ *	--object-path /org/freedesktop/systemd1/unit/minecraft_40world1_2eservice
+ *	--method org.freedesktop.systemd1.Unit.Start "fail"
+ */
+bool
+systemd_service_start(struct server *server)
+{
+	assert_return(server, false);
+
+	return systemd_service_action(server, "Start");
+}
+
diff --git a/mcserverproxy/systemd.h b/mcserverproxy/systemd.h
new file mode 100644
index 0000000..d455044
--- /dev/null
+++ b/mcserverproxy/systemd.h
@@ -0,0 +1,14 @@
+#ifndef foosystemdhfoo
+#define foosystemdhfoo
+
+char *systemd_object_path(const char *service);
+
+void systemd_delete();
+
+bool systemd_service_running(struct server *server);
+
+bool systemd_service_stop(struct server *server);
+
+bool systemd_service_start(struct server *server);
+
+#endif
diff --git a/mcserverproxy/uring.c b/mcserverproxy/uring.c
new file mode 100644
index 0000000..e979471
--- /dev/null
+++ b/mcserverproxy/uring.c
@@ -0,0 +1,759 @@
+#define _GNU_SOURCE
+#include <liburing.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "main.h"
+#include "uring.h"
+
+struct uring_ev {
+	struct io_uring uring;
+	struct io_uring_params uring_params;
+	struct uring_task task;
+
+	/* for testing if the kernel supports splice */
+	int pipe[2];
+	int tfd;
+};
+
+enum cqe_type {
+	CQE_TYPE_NORMAL		= 0x0,
+	CQE_TYPE_CANCEL		= 0x1,
+	CQE_TYPE_CLOSE		= 0x2,
+	CQE_TYPE_POLL_CANCEL	= 0x3
+};
+
+#define CQE_TYPE_PTR_MASK 0x3
+
+uint64_t sqe_count = 0;
+uint64_t cqe_count = 0;
+
+static struct io_uring_sqe *
+get_sqe(struct uring_task *task)
+{
+	struct io_uring_sqe *sqe;
+	
+	assert_die(task, "invalid arguments");
+
+	sqe = io_uring_get_sqe(&cfg->uring->uring);
+	if (!sqe) {
+		io_uring_submit(&cfg->uring->uring);
+		sqe = io_uring_get_sqe(&cfg->uring->uring);
+		if (!sqe)
+			die("failed to get an sqe!");
+	}
+
+	sqe_count++;
+	uring_task_get(task);
+	return sqe;
+}
+
+void
+uring_task_refdump(struct uring_task *task)
+{
+	char buf[4096];
+	struct uring_task *tmp;
+
+	assert_return(task);
+
+	if (!debug_enabled(DBG_REF))
+		return;
+
+	buf[0] = '\0';
+	for (tmp = task; tmp; tmp = tmp->parent) {
+		size_t prefix;
+		char *dst;
+
+		if (tmp->parent)
+			prefix = strlen("->") + strlen(tmp->name);
+		else
+			prefix = strlen(tmp->name);
+
+		memmove(&buf[prefix], &buf[0], strlen(buf) + 1);
+
+		dst = &buf[0];
+		if (tmp->parent) {
+			*dst++ = '-';
+			*dst++ = '>';
+		}
+
+		memcpy(dst, tmp->name, strlen(tmp->name));
+	}
+
+	info("%s (0x%p parent 0x%p free 0x%p fd %i ref %u)",
+	     buf, task, task->parent, task->free, task->fd,
+	     task->refcount);
+}
+
+/*
+ * Similar to uring_task_put, but can be called from other tasks
+ * while the task is active.
+ */
+void
+uring_task_destroy(struct uring_task *task)
+{
+	assert_return(task);
+	assert_return_silent(!task->dead);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	if (task->fd >= 0) {
+		struct io_uring_sqe *sqe;
+	
+		sqe = get_sqe(task);
+		io_uring_prep_cancel(sqe, task, 0);
+		io_uring_sqe_set_data(sqe, (void *)((uintptr_t)task | CQE_TYPE_CANCEL));
+	}
+
+	task->dead = true;
+	uring_task_put(task);
+}
+
+void
+uring_task_put(struct uring_task *task)
+{
+	struct uring_task *parent;
+
+	assert_return(task);
+
+	debug(DBG_REF, "task %s (%p), refcount %u -> %u",
+	      task->name, task, task->refcount, task->refcount - 1);
+
+	task->refcount--;
+
+	if (task->refcount > 0)
+		return;
+
+	if (task->refcount < 0)
+		error("Negative refcount!");
+
+	if (task->fd >= 0) {
+		uring_task_close_fd(task);
+		/* We'll be called again once the fd is closed */
+		return;
+	}
+
+	parent = task->parent;
+	if (task->free)
+		task->free(task);
+
+	if (parent) {
+		debug(DBG_REF, "putting parent %s (%p)", parent->name, parent);
+		uring_task_put(parent);
+	}
+}
+
+void
+uring_task_get(struct uring_task *task)
+{
+	assert_return(task);
+
+	debug(DBG_REF, "task %s (%p), refcount %u -> %u",
+	      task->name, task, task->refcount, task->refcount + 1);
+
+	if (task->refcount < 0)
+		error("Negative refcount!");
+
+	task->refcount++;
+}
+
+void
+uring_task_set_buf(struct uring_task *task, struct uring_task_buf *tbuf)
+{
+	assert_return(task && tbuf);
+
+	debug(DBG_UR, "task %s (%p), buf %p, refcount %u",
+	      task->name, task, tbuf, task->refcount);
+
+	/* iov_len and msg_namelen are set at send/receive time */
+	tbuf->iov.iov_base = tbuf->buf;
+	tbuf->msg.msg_name = &task->saddr.storage;
+	tbuf->msg.msg_iov = &tbuf->iov;
+	tbuf->msg.msg_iovlen = 1;
+	tbuf->msg.msg_control = NULL;
+	tbuf->msg.msg_controllen = 0;
+	tbuf->msg.msg_flags = 0;
+	task->tbuf = tbuf;
+}
+
+void
+uring_task_set_fd(struct uring_task *task, int fd)
+{
+	assert_return(task);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, fd, task->refcount);
+
+	task->fd = fd;
+}
+
+void
+uring_task_close_fd(struct uring_task *task)
+{
+	assert_return(task);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	if (task->fd < 0)
+		return;
+
+	uring_close(task, task->fd);
+	task->fd = -1;
+}
+
+struct uring_task *
+uring_parent()
+{
+	assert_die(cfg->uring, "invalid arguments");
+
+	return &cfg->uring->task;
+}
+
+void
+uring_task_init(struct uring_task *task, const char *name,
+		struct uring_task *parent, void (*free)(struct uring_task *))
+{
+	static bool first = true;
+
+	assert_die(task && !empty_str(name) && free, "invalid arguments");
+
+	if (first)
+		first = false;
+	else
+		assert_die(parent, "called without a parent task");
+
+	task->refcount = 1;
+	task->fd = -1;
+	task->parent = parent;
+	task->free = free;
+	task->dead = false;
+	task->name = name;
+	task->tbuf = NULL;
+
+	if (task->parent) {
+		debug(DBG_REF, "task %s (%p), refcount %u, "
+		      "getting parent %s (%p), refcount %u",
+		      task->name, task, task->refcount,
+		      task->parent->name, task->parent, task->parent->refcount);
+		uring_task_get(task->parent);
+	}
+}
+
+void
+uring_close(struct uring_task *task, int fd)
+{
+	struct io_uring_sqe *sqe;
+
+	assert_return(task && fd >= 0);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+       	sqe = get_sqe(task);
+	io_uring_prep_close(sqe, fd);
+	io_uring_sqe_set_data(sqe, (void *)((uintptr_t)task | CQE_TYPE_CLOSE));
+}
+
+static void
+uring_tbuf_write_cb(struct uring_task *task, int res)
+{
+	int r;
+
+	assert_return(task && task->tbuf && task->final_cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	if (res < 0) {
+		r = res;
+		goto finished;
+	}
+
+	/* We wrote some more data */
+	task->tbuf->done += res;
+	if (task->tbuf->done >= task->tbuf->len || res == 0) {
+		r = task->tbuf->len;
+		goto finished;
+	}
+
+	uring_write(task, task->tbuf->buf + task->tbuf->done,
+		    task->tbuf->len - task->tbuf->done,
+		    uring_tbuf_write_cb);
+	return;
+
+finished:
+	task->final_cb(task, r);
+}
+
+void
+uring_tbuf_write(struct uring_task *task, utask_cb_t final_cb)
+{
+	assert_return(task && task->fd >= 0 && task->tbuf && task->tbuf->len > 0);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	task->tbuf->done = 0;
+	task->final_cb = final_cb;
+	uring_write(task, &task->tbuf->buf, task->tbuf->len, uring_tbuf_write_cb);
+}
+
+void
+uring_write(struct uring_task *task, void *buf, size_t len, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+
+	assert_return(task && buf && len > 0 && cb && task->fd >= 0);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+       	sqe = get_sqe(task);
+	task->cb = cb;
+	io_uring_prep_write(sqe, task->fd, buf, len, 0);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+static void
+uring_tbuf_read_until_cb(struct uring_task *task, int res)
+{
+	int r;
+
+	assert_return(task && task->tbuf && task->final_cb && task->is_complete_cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	if (res < 0) {
+		r = res;
+		goto finished;
+	}
+
+	task->tbuf->len += res;
+	r = task->is_complete_cb(task, res);
+	if (r < 0) {
+		r = res;
+		goto finished;
+	} else if (r > 0) {
+		r = task->tbuf->len;
+		goto finished;
+	}
+
+	/* Need to read more */
+	if (task->tbuf->len >= sizeof(task->tbuf->buf)) {
+		r = E2BIG;
+		goto finished;
+	}
+
+	uring_read_offset(task, task->tbuf->buf + task->tbuf->len,
+			  sizeof(task->tbuf->buf) - task->tbuf->len,
+			  task->tbuf->len, uring_tbuf_read_until_cb);
+	return;
+
+finished:
+	task->final_cb(task, r);
+}
+
+void
+uring_tbuf_read_until(struct uring_task *task,
+		      rutask_cb_t is_complete_cb, utask_cb_t final_cb)
+{
+	assert_return(task && task->fd >= 0 && task->tbuf && is_complete_cb && final_cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	task->tbuf->len = 0;
+	task->is_complete_cb = is_complete_cb;
+	task->final_cb = final_cb;
+	uring_read(task, &task->tbuf->buf, sizeof(task->tbuf->buf),
+		   uring_tbuf_read_until_cb);
+}
+
+static int
+uring_tbuf_eof(struct uring_task *task, int res)
+{
+	assert_return(task && task->tbuf, -EINVAL);
+	assert_task_alive_or(DBG_UR, task, return -EINTR);
+
+	if (task->tbuf->len + 1 >= sizeof(task->tbuf->buf))
+		return -E2BIG;
+
+	if (res > 0)
+		return 0;
+
+	task->tbuf->buf[task->tbuf->len] = '\0';
+	task->tbuf->len++;
+	return 1;
+}
+
+void
+uring_tbuf_read_until_eof(struct uring_task *task,
+			  utask_cb_t final_cb)
+{
+	assert_return(task && task->tbuf && final_cb);
+
+	uring_tbuf_read_until(task, uring_tbuf_eof, final_cb);
+}
+
+static int
+uring_tbuf_have_data(struct uring_task *task, int res)
+{
+	assert_return(task, -EINVAL);
+
+	if (res < 0)
+		return res;
+	else
+		return 1;
+}
+
+void
+uring_tbuf_read(struct uring_task *task, utask_cb_t final_cb)
+{
+	assert_return(task && final_cb);
+
+	uring_tbuf_read_until(task, uring_tbuf_have_data, final_cb);
+}
+
+void
+uring_read_offset(struct uring_task *task, void *buf, size_t len, off_t offset, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+
+	assert_return(task && buf && len > 0 && task->fd >= 0);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	sqe = get_sqe(task);
+	task->cb = cb;
+	io_uring_prep_read(sqe, task->fd, buf, len, offset);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+void
+uring_openat(struct uring_task *task, const char *path, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+       
+	assert_return(task && !empty_str(path) && cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	sqe = get_sqe(task);
+	task->cb = cb;
+	io_uring_prep_openat(sqe, AT_FDCWD, path, O_RDONLY | O_CLOEXEC, 0);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+void
+uring_tbuf_recvmsg(struct uring_task *task, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+
+	assert_return(task && task->fd >= 0 && task->tbuf && cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	sqe = get_sqe(task);
+	task->tbuf->done = 0;
+	task->tbuf->len = 0;
+	task->tbuf->iov.iov_len = sizeof(task->tbuf->buf);
+	task->tbuf->msg.msg_namelen = task->saddr.addrlen;
+	task->cb = cb;
+	io_uring_prep_recvmsg(sqe, task->fd, &task->tbuf->msg, 0);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+void
+uring_tbuf_sendmsg(struct uring_task *task, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+
+	assert_return(task && task->fd >= 0 && task->tbuf && cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	sqe = get_sqe(task);
+	task->tbuf->done = 0;
+	task->tbuf->iov.iov_len = task->tbuf->len;
+	task->tbuf->msg.msg_namelen = task->saddr.addrlen;
+	task->cb = cb;
+	io_uring_prep_sendmsg(sqe, task->fd, &task->tbuf->msg, 0);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+void
+uring_connect(struct uring_task *task, struct saddr *saddr, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+
+	assert_return(task && task->fd >= 0 && saddr && cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	sqe = get_sqe(task);
+	task->cb = cb;
+	io_uring_prep_connect(sqe, task->fd, (struct sockaddr *)&saddr->storage, saddr->addrlen);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+void
+uring_accept(struct uring_task *task, struct saddr *saddr, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+
+	assert_return(task && task->fd >= 0 && saddr && cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	sqe = get_sqe(task);
+	saddr->addrlen = sizeof(saddr->storage);
+	task->cb = cb;
+	io_uring_prep_accept(sqe, task->fd, (struct sockaddr *)&saddr->storage, &saddr->addrlen, SOCK_CLOEXEC);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+void
+uring_splice(struct uring_task *task, int fd_in, int fd_out, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+	
+	assert_return(task && fd_in >= 0 && fd_out >= 0 && cb);
+
+	debug(DBG_UR, "task %s (%p), fd_in %i, fd_out %i, refcount %u",
+	      task->name, task, fd_in, fd_out, task->refcount);
+
+	sqe = get_sqe(task);
+	task->cb = cb;
+	io_uring_prep_splice(sqe, fd_in, -1, fd_out, -1, 4096, SPLICE_F_MOVE);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+void
+uring_poll(struct uring_task *task, short poll_mask, utask_cb_t cb)
+{
+	struct io_uring_sqe *sqe;
+	
+	assert_return(task && task->fd >= 0 && poll_mask && cb);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	sqe = get_sqe(task);
+	task->cb = cb;
+	io_uring_prep_poll_add(sqe, task->fd, poll_mask);
+	io_uring_sqe_set_data(sqe, task);
+}
+
+void
+uring_poll_cancel(struct uring_task *task)
+{
+	struct io_uring_sqe *sqe;
+	
+	assert_return(task);
+
+	if (task->fd < 0) {
+		/* not an error, no need to print error msg */
+		return;
+	}
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	sqe = get_sqe(task);
+	task->dead = true;
+	io_uring_prep_poll_remove(sqe, task);
+	io_uring_sqe_set_data(sqe, (void *)((uintptr_t)task | CQE_TYPE_POLL_CANCEL));
+}
+
+static void
+uring_free(struct uring_task *task)
+{
+	struct uring_ev *uring = container_of(task, struct uring_ev, task);
+
+	assert_return(task);
+
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	io_uring_queue_exit(&uring->uring);
+	cfg->uring = NULL;
+	xfree(uring);
+}
+
+void
+uring_refdump()
+{
+	assert_return(cfg->uring);
+
+	uring_task_refdump(&cfg->uring->task);
+}
+
+void
+uring_delete()
+{
+	struct uring_task *task;
+
+	assert_return(cfg->uring);
+
+	task = &cfg->uring->task;
+	debug(DBG_UR, "task %s (%p), fd %i, refcount %u",
+	      task->name, task, task->fd, task->refcount);
+
+	uring_task_put(task);
+}
+
+static void
+uring_splice_test_cb(struct uring_task *task, int res)
+{
+	struct uring_ev *uring = container_of(task, struct uring_ev, task);
+
+	assert_die(task && uring == cfg->uring, "splice test failed");
+
+	uring_close(task, uring->tfd);
+	uring_close(task, uring->pipe[PIPE_RD]);
+	uring_close(task, uring->pipe[PIPE_WR]);
+
+	uring->tfd = -1;
+	uring->pipe[PIPE_RD] = -1;
+	uring->pipe[PIPE_WR] = -1;
+
+	if (res >= 0) {
+		cfg->splice_supported = true;
+		debug(DBG_UR, "splice supported");
+	} else if (res == -EINVAL)
+		debug(DBG_UR, "splice not supported");
+	else 
+		error("splice check failed: %i\n", res);
+}
+
+void
+uring_init()
+{
+	struct uring_ev *uring;
+
+	assert_return(!cfg->uring);
+
+	uring = zmalloc(sizeof(*uring));
+	if (!uring)
+		die("malloc: %m");
+
+	if (io_uring_queue_init_params(4096, &uring->uring, &uring->uring_params) < 0)
+		die("io_uring_queue_init_params");
+
+	debug(DBG_UR, "uring initialized, features: 0x%08x",
+	      uring->uring_params.features);
+
+	uring_task_init(&uring->task, "io_uring", &cfg->task, uring_free);
+	cfg->uring = uring;
+
+	/* splice check, a bit convoluted, but seems to be no simpler way */
+	cfg->splice_supported = false;
+	if (pipe2(uring->pipe, O_CLOEXEC) < 0)
+		die("pipe2: %m");
+	uring->tfd = open("/dev/null", O_RDONLY | O_CLOEXEC | O_NOCTTY);
+	if (uring->tfd < 0)
+		die("open(\"/dev/null\"): %m");
+	uring_splice(&uring->task, uring->tfd, uring->pipe[PIPE_WR], uring_splice_test_cb);
+}
+
+static inline void
+uring_print_cqe(const char *type, struct uring_task *task,
+		struct io_uring_cqe *cqe)
+{
+	assert_return(!empty_str(type) && task && cqe);
+
+	debug(DBG_UR, "got CQE "
+	      "(type: %s, res: %i (%s), task: %s (%p), fd: %i, cb: %p)",
+	      type,
+	      cqe->res,
+	      cqe->res < 0 ? strerror(-cqe->res) : "ok",
+	      task->name ? task->name : "<none>",
+	      task,
+	      task->fd,
+	      task->cb);
+}
+
+void
+uring_event_loop()
+{
+	while (true) {
+		struct io_uring_cqe *cqe;
+		unsigned nr, head;
+		int r;
+
+		io_uring_submit(&cfg->uring->uring);
+		r = io_uring_wait_cqe(&cfg->uring->uring, &cqe);
+		if (r < 0) {
+			if (errno == EINTR)
+				continue;
+			else
+				die("io_uring_wait_cqe: %i", r);
+		}
+
+		nr = 0;
+		io_uring_for_each_cqe(&cfg->uring->uring, head, cqe) {
+			struct uring_task *task = io_uring_cqe_get_data(cqe);
+			bool do_cb;
+			enum cqe_type cqe_type;
+
+			cqe_count++;
+
+			cqe_type = ((uintptr_t)task & CQE_TYPE_PTR_MASK);
+			task = (void *)((uintptr_t)task & ~CQE_TYPE_PTR_MASK);
+
+			if (!task)
+				die("null task");
+
+			switch (cqe_type) {
+			case CQE_TYPE_CANCEL:
+				uring_print_cqe("cancel", task, cqe);
+				do_cb = false;
+				break;
+
+			case CQE_TYPE_CLOSE:
+				uring_print_cqe("close", task, cqe);
+				do_cb = false;
+				break;
+
+			case CQE_TYPE_POLL_CANCEL:
+				uring_print_cqe("poll_cancel", task, cqe);
+				do_cb = false;
+				break;
+
+			case CQE_TYPE_NORMAL:
+				uring_print_cqe("standard", task, cqe);
+				do_cb = true;
+				break;
+
+			default:
+				die("unknown CQE type");
+			}
+
+			if (do_cb && task->cb)
+				task->cb(task, cqe->res);
+
+			uring_task_put(task);
+
+			if (exiting)
+				return;
+
+			nr++;
+		}
+
+		io_uring_cq_advance(&cfg->uring->uring, nr);
+	}
+}
+
diff --git a/mcserverproxy/uring.h b/mcserverproxy/uring.h
new file mode 100644
index 0000000..9c33104
--- /dev/null
+++ b/mcserverproxy/uring.h
@@ -0,0 +1,73 @@
+#ifndef foouringhfoo
+#define foouringhfoo
+
+extern uint64_t sqe_count;
+extern uint64_t cqe_count;
+
+void uring_task_refdump(struct uring_task *task);
+
+void uring_task_destroy(struct uring_task *task);
+
+void uring_task_put(struct uring_task *task);
+
+void uring_task_get(struct uring_task *task);
+
+void uring_task_set_buf(struct uring_task *task, struct uring_task_buf *tbuf);
+
+void uring_task_set_fd(struct uring_task *task, int fd);
+
+void uring_task_close_fd(struct uring_task *task);
+
+struct uring_task *uring_parent();
+
+void uring_task_init(struct uring_task *task, const char *name,
+		     struct uring_task *parent,
+		     void (*free)(struct uring_task *));
+
+void uring_close(struct uring_task *task, int fd);
+
+void uring_tbuf_write(struct uring_task *task, utask_cb_t final_cb);
+
+void uring_write(struct uring_task *task, void *buf, size_t len, utask_cb_t cb);
+
+void uring_tbuf_read_until(struct uring_task *task,
+			   rutask_cb_t is_complete_cb, utask_cb_t final_cb);
+
+void uring_tbuf_read_until_eof(struct uring_task *task, utask_cb_t final_cb);
+
+void uring_tbuf_read(struct uring_task *task, utask_cb_t final_cb);
+
+void uring_read_offset(struct uring_task *task, void *buf,
+		       size_t len, off_t offset, utask_cb_t cb);
+
+static inline void
+uring_read(struct uring_task *task, void *buf, size_t len, utask_cb_t cb)
+{
+	uring_read_offset(task, buf, len, 0, cb);
+}
+
+void uring_openat(struct uring_task *task, const char *path, utask_cb_t cb);
+
+void uring_tbuf_recvmsg(struct uring_task *task, utask_cb_t cb);
+
+void uring_tbuf_sendmsg(struct uring_task *task, utask_cb_t cb);
+
+void uring_connect(struct uring_task *task, struct saddr *saddr, utask_cb_t cb);
+
+void uring_accept(struct uring_task *task, struct saddr *saddr, utask_cb_t cb);
+
+void uring_splice(struct uring_task *task, int fd_in, int fd_out, utask_cb_t cb);
+
+void uring_poll(struct uring_task *task, short poll_mask, utask_cb_t cb);
+
+void uring_poll_cancel(struct uring_task *task);
+
+void uring_delete();
+
+void uring_refdump();
+
+void uring_init();
+
+void uring_event_loop();
+
+#endif
diff --git a/mcserverproxy/utils.c b/mcserverproxy/utils.c
new file mode 100644
index 0000000..eacc586
--- /dev/null
+++ b/mcserverproxy/utils.c
@@ -0,0 +1,430 @@
+#include <stdlib.h>
+#include <errno.h>
+#include <stdint.h>
+#include <limits.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <inttypes.h>
+
+#include "main.h"
+#include "utils.h"
+#include "uring.h"
+
+static unsigned total_malloc_count = 0;
+static int malloc_count = 0;
+
+LIST_HEAD(malloc_list);
+
+struct allocation {
+	const char *allocfn;
+	const char *callerfn;
+	int line;
+	void *ptr;
+	size_t size;
+	struct list_head list;
+};
+
+static void
+add_allocation(const char *allocfn, const char *callerfn, int line, void *ptr, size_t size)
+{
+	struct allocation *a;
+
+	assert_die(!empty_str(allocfn) && !empty_str(callerfn) && line > 0 && ptr && size > 0, "invalid arguments");
+
+	a = malloc(sizeof(*a));
+	if (!a)
+		die("malloc: %m");
+	a->allocfn = allocfn;
+	a->callerfn = callerfn;
+	a->line = line;
+	a->ptr = ptr;
+	a->size = size;
+	list_add(&a->list, &malloc_list);
+	total_malloc_count++;
+	malloc_count++;
+	debug(DBG_MALLOC, "called from %s:%i - %s(%zu) = %p (%p)",
+	      callerfn, line, allocfn, size, ptr, a);
+}
+
+void *
+__zmalloc(const char *fn, int line, size_t size)
+{
+	void *ptr;
+
+	assert_die(!empty_str(fn) && line > 0 && size > 0, "invalid arguments");
+
+	ptr = calloc(1, size);
+	if (ptr)
+		add_allocation("zmalloc", fn, line, ptr, size);
+	return ptr;
+}
+
+char *
+__xstrdup(const char *fn, int line, const char *s)
+{
+	char *ptr;
+
+	assert_die(!empty_str(fn) && line > 0 && !empty_str(s), "invalid arguments");
+
+	ptr = strdup(s);
+	if (ptr)
+		add_allocation("xstrdup", fn, line, ptr, strlen(s) + 1);
+	return ptr;
+}
+
+char *
+__xstrndup(const char *fn, int line, const char *s, size_t n)
+{
+	char *ptr;
+
+	assert_die(!empty_str(fn) && line > 0 && !empty_str(s) && n > 0, "invalid arguments");
+
+	ptr = strndup(s, n);
+	if (ptr)
+		add_allocation("xstrndup", fn, line, ptr, n);
+	return ptr;
+}
+
+void
+__xfree(const char *fn, int line, void *ptr)
+{
+	struct allocation *a, *tmp;
+	unsigned delete_count = 0;
+
+	assert_die(!empty_str(fn) && line > 0, "invalid arguments");
+
+	if (!ptr)
+		return;
+	free(ptr);
+	malloc_count--;
+
+	debug(DBG_MALLOC, "called from %s:%i - %p", fn, line, ptr);
+
+	list_for_each_entry_safe(a, tmp, &malloc_list, list) {
+		if (a->ptr == ptr) {
+			list_del(&a->list);
+			free(a);
+			delete_count++;
+		}
+	}
+
+	if (delete_count != 1) {
+		error("Delete count is %u for ptr 0x%p", delete_count, ptr);
+		exit(EXIT_FAILURE);
+	}
+}
+
+void
+debug_resource_usage()
+{
+	struct allocation *a;
+	DIR *dir;
+	struct dirent *dent;
+	char buf[4096];
+	ssize_t r;
+	unsigned file_count = 0;
+
+	debug(DBG_MALLOC, "Still malloced %i (total %u)",
+	      malloc_count, total_malloc_count);
+
+	list_for_each_entry(a, &malloc_list, list) {
+		debug(DBG_MALLOC, "* Lost allocation - %s:%i - ptr: %p, size: %zu",
+		      a->callerfn, a->line, a->ptr, a->size);
+	}
+
+	dir = opendir("/proc/self/fd");
+	if (!dir) {
+		error("failed to open fd dir");
+		return;
+	}
+
+	debug(DBG_MALLOC, "Open files:");
+	while ((dent = readdir(dir)) != NULL) {
+		if (streq(dent->d_name, ".") || streq(dent->d_name, ".."))
+			continue;
+
+		r = readlinkat(dirfd(dir), dent->d_name, buf, sizeof(buf));
+		if (r < 0) {
+			debug(DBG_MALLOC, "Failed to readlink %s", dent->d_name);
+			continue;
+		}
+		buf[r] = '\0';
+		debug(DBG_MALLOC, " * %s -> %s", dent->d_name, buf);
+		file_count++;
+	}
+	closedir(dir);
+
+	if (file_count > 4)
+		debug(DBG_MALLOC, "Lost file descriptor(s)");
+
+	debug(DBG_MALLOC, "CQEs used: %" PRIu64 ", SQEs used: %" PRIu64,
+	      cqe_count, sqe_count);
+}
+
+void
+socket_set_low_latency(int sfd)
+{
+	int option;
+
+	assert_return(sfd >= 0);
+
+	/* Probably not necessary, but can't hurt */
+	if (cfg->socket_defer) {
+		option = true;
+		if (setsockopt(sfd, SOL_SOCKET, SO_KEEPALIVE, &option, sizeof(option)) < 0)
+			error("setsockopt: %m");
+	}
+
+	/* Doubtful if it has much effect, but can't hurt */
+	if (cfg->socket_iptos) {
+		option = IPTOS_LOWDELAY;
+		if (setsockopt(sfd, IPPROTO_IP, IP_TOS, &option, sizeof(option)) < 0)
+			error("setsockopt: %m");
+	}
+
+	/* Nagle's algorithm is a poor fit for gaming */
+	if (cfg->socket_nodelay) {
+		option = true;
+		if (setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, &option, sizeof(option)) < 0)
+			error("setsockopt: %m");
+	}
+}
+
+void
+connection_set_local(struct connection *conn, int fd)
+{
+	assert_return(conn && fd >= 0);
+
+	conn->local.addrlen = sizeof(conn->local.storage);
+	if (getsockname(fd, (struct sockaddr *)&conn->local.storage,
+			&conn->local.addrlen) < 0)
+		sprintf(conn->local.addrstr, "<unknown>");
+	else
+		saddr_set_addrstr(&conn->local);
+}
+
+void
+connection_set_remote(struct connection *conn, struct saddr *remote)
+{
+	assert_return(conn && remote);
+
+	conn->remote = *remote;
+	saddr_set_addrstr(&conn->remote);
+}
+
+static void connect_next(struct uring_task *task, struct connection *conn);
+
+static void
+connect_cb(struct uring_task *task, int res)
+{
+	struct connection *conn;
+
+	assert_return(task && task->priv);
+
+	conn = task->priv;
+	if (res < 0) {
+		debug(DBG_SRV, "%s: connection to %s failed",
+		      task->name, conn->remote.addrstr);
+		uring_task_close_fd(task);
+		connect_next(task, conn);
+		return;
+	}
+
+	connection_set_local(conn, task->fd);
+
+	debug(DBG_SRV, "%s: connection established %s -> %s",
+	      task->name, conn->local.addrstr, conn->remote.addrstr);
+
+	conn->cb(conn, true);
+}
+
+static void
+connect_next(struct uring_task *task, struct connection *conn)
+{
+        struct saddr *remote, *tmp;
+        int sfd;
+        unsigned i;
+
+	assert_return(task && conn && conn->cb);
+again:
+	assert_task_alive_or(DBG_UR, task, goto out);
+
+	i = 0;
+        remote = NULL;
+        list_for_each_entry(tmp, conn->addrs, list) {
+                if (i == conn->next_addr) {
+                        remote = tmp;
+                        break;
+                }
+                i++;
+        }
+
+        if (!remote) {
+		debug(DBG_SRV, "%s: no more remote addresses to attempt",
+		      task->name);
+		goto out;
+        }
+
+	conn->next_addr++;
+	connection_set_remote(conn, remote);
+        debug(DBG_SRV, "%s: attempting to connect to %s",
+	      task->name, conn->remote.addrstr);
+
+        sfd = socket(conn->remote.storage.ss_family, SOCK_STREAM | SOCK_CLOEXEC, 0);
+        if (sfd < 0) {
+                error("socket: %m");
+                goto again;
+        }
+
+	socket_set_low_latency(sfd);
+
+	task->priv = conn;
+        uring_task_set_fd(task, sfd);
+        uring_connect(task, &conn->remote, connect_cb);
+	return;
+
+out:
+	conn->cb(conn, false);
+}
+
+void
+connect_any(struct uring_task *task,
+	    struct list_head *addrs, struct connection *conn,
+	    connection_cb_t cb)
+{
+	assert_return(task && addrs && conn && cb);
+
+	conn->next_addr = 0;
+	conn->addrs = addrs;
+	conn->cb = cb;
+	connect_next(task, conn);
+}
+
+uint16_t
+saddr_port(struct saddr *saddr)
+{
+	assert_return(saddr, 0);
+
+	switch (saddr->storage.ss_family) {
+	case AF_INET:
+		return ntohs(saddr->in4.sin_port);
+	case AF_INET6:
+		return ntohs(saddr->in6.sin6_port);
+	default:
+		return 0;
+	}
+}
+
+char *
+saddr_addr(struct saddr *saddr, char *buf, size_t len)
+{
+	assert_return(saddr && buf && len > 0, NULL);
+
+	switch (saddr->storage.ss_family) {
+	case AF_INET:
+		if (inet_ntop(saddr->in4.sin_family, &saddr->in4.sin_addr, buf, len))
+			return buf;
+		break;
+	case AF_INET6:
+		if (inet_ntop(saddr->in6.sin6_family, &saddr->in6.sin6_addr, buf, len))
+			return buf;
+		break;
+	default:
+		break;
+	}
+
+	snprintf(buf, len, "<unknown>");
+	return buf;
+}
+
+void
+saddr_set_ipv4(struct saddr *saddr, in_addr_t ip, in_port_t port)
+{
+	assert_return(saddr);
+
+	memset(&saddr->in4, 0, sizeof(saddr->in4));
+	saddr->in4.sin_family = AF_INET;
+	saddr->in4.sin_port = port;
+	saddr->in4.sin_addr.s_addr = ip;
+	saddr->addrlen = sizeof(saddr->in4);
+	saddr_set_addrstr(saddr);
+}
+
+void
+saddr_set_ipv6(struct saddr *saddr, const struct in6_addr *ip, in_port_t port)
+{
+	assert_return(saddr && ip);
+
+	memset(&saddr->in6, 0, sizeof(saddr->in6));
+	saddr->in6.sin6_family = AF_INET6;
+	saddr->in6.sin6_port = port;
+	if (ip)
+		saddr->in6.sin6_addr = *ip;
+	saddr->addrlen = sizeof(saddr->in6);
+	saddr_set_addrstr(saddr);
+}
+
+void
+saddr_set_addrstr(struct saddr *saddr)
+{
+	assert_return(saddr);
+
+	char abuf[ADDRSTRLEN];
+
+	switch (saddr->storage.ss_family) {
+	case AF_INET:
+		snprintf(saddr->addrstr, sizeof(saddr->addrstr),
+			 "AF_INET4 %s %" PRIu16,
+			 saddr_addr(saddr, abuf, sizeof(abuf)),
+			 saddr_port(saddr));
+		break;
+	case AF_INET6:
+		snprintf(saddr->addrstr, sizeof(saddr->addrstr),
+			 "AF_INET6 %s %" PRIu16,
+			 saddr_addr(saddr, abuf, sizeof(abuf)),
+			 saddr_port(saddr));
+		break;
+	default:
+		snprintf(saddr->addrstr, sizeof(saddr->addrstr), "AF_UNKNOWN");
+		break;
+	}
+}
+
+int
+strtou16_strict(const char *str, uint16_t *result)
+{
+	char *end;
+	long val;
+
+	assert_return(!empty_str(str) && result, -EINVAL);
+
+	errno = 0;
+	val = strtol(str, &end, 10);
+
+	if (errno == ERANGE && (val == LONG_MAX || val == LONG_MIN))
+		return -EINVAL;
+	
+	if (errno != 0 && val == 0)
+		return -EINVAL;
+
+	if (end == str)
+		return -EINVAL;
+
+	if (*end != '\0')
+		return -EINVAL;
+
+	if (val < 1 || val > UINT16_MAX)
+		return -EINVAL;
+
+	if (result)
+		*result = val;
+	return 0;
+}
+
diff --git a/mcserverproxy/utils.h b/mcserverproxy/utils.h
new file mode 100644
index 0000000..c36a36c
--- /dev/null
+++ b/mcserverproxy/utils.h
@@ -0,0 +1,245 @@
+#ifndef fooutilshfoo
+#define fooutilshfoo
+
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <linux/if_packet.h>
+
+struct list_head {
+	struct list_head *next;
+	struct list_head *prev;
+};
+
+#define zmalloc(s) __zmalloc(__func__, __LINE__, s)
+void *__zmalloc(const char *fn, int line, size_t s);
+
+#define xstrdup(s) __xstrdup(__func__, __LINE__, s)
+char *__xstrdup(const char *fn, int line, const char *s);
+
+#define xstrndup(s, n) __xstrndup(__func__, __LINE__, s, n)
+char *__xstrndup(const char *fn, int line, const char *s, size_t n);
+
+#define xfree(s) __xfree(__func__, __LINE__, s)
+void __xfree(const char *fn, int line, void *ptr);
+
+void debug_resource_usage();
+
+/* Length of longest DNS name = 253 + trailing dot */
+#define FQDN_STR_LEN 254
+
+/* Length of longest port string = strlen("65535") */
+#define PORT_STR_LEN 5
+
+/* Length of longest address family string = strlen("AF_INETX") */
+#define AF_STR_LEN 8
+
+/* Length of longest addrstr, format = "AF_INETX <IPADDR> <PORT> */
+#define ADDRSTRLEN (AF_STR_LEN + 1 + INET6_ADDRSTRLEN + 1 + PORT_STR_LEN + 1)
+struct saddr {
+	union {
+		struct sockaddr_storage storage;
+		struct sockaddr_in in4;
+		struct sockaddr_in6 in6;
+		struct sockaddr_ll ll;
+	};
+	socklen_t addrlen;
+	char addrstr[ADDRSTRLEN];
+	struct list_head list;
+};
+
+struct connection;
+
+typedef void(*connection_cb_t)(struct connection *, bool);
+
+struct connection {
+	struct saddr remote;
+	struct saddr local;
+
+	struct list_head *addrs;
+	unsigned next_addr;
+
+	connection_cb_t cb;
+};
+
+struct uring_task;
+
+void socket_set_low_latency(int sfd);
+
+void connection_set_local(struct connection *conn, int fd);
+
+void connection_set_remote(struct connection *conn, struct saddr *remote);
+
+void connect_any(struct uring_task *task,
+		 struct list_head *addrs, struct connection *conn,
+		 connection_cb_t cb);
+
+char *saddr_addr(struct saddr *saddr, char *buf, size_t len);
+
+uint16_t saddr_port(struct saddr *saddr);
+
+void saddr_set_ipv4(struct saddr *saddr, in_addr_t ip, in_port_t port);
+
+void saddr_set_ipv6(struct saddr *saddr, const struct in6_addr *ip, in_port_t port);
+
+void saddr_set_addrstr(struct saddr *saddr);
+
+int strtou16_strict(const char *str, uint16_t *result);
+
+static inline bool empty_str(const char *str)
+{
+	if (!str || str[0] == '\0')
+		return true;
+	else
+		return false;
+}
+
+static inline bool streq(const char *a, const char *b)
+{
+	return strcmp(a, b) == 0;
+}
+
+static inline bool strcaseeq(const char *a, const char *b)
+{
+	return strcasecmp(a, b) == 0;
+}
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define chtobe32(x) __bswap_constant_32(x)
+#else
+#define chtobe32(x) (x)
+#endif
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define cinet_addr(a,b,c,d) ((uint32_t)((a)<<0|(b)<<8|(c)<<16|(d)<<24))
+#else
+#define cinet_addr(a,b,c,d) ((uint32_t)((a)<<24|(b)<<16|(c)<<8|(d)<<0))
+#endif
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define LIST_HEAD(name) struct list_head name = LIST_HEAD_INIT(name)
+
+static inline void list_init(struct list_head *list)
+{
+	list->next = list;
+	list->prev = list;
+}
+
+static inline void list_del(struct list_head *list)
+{
+	list->next->prev = list->prev;
+	list->prev->next = list->next;
+}
+
+static inline void list_add(struct list_head *new, struct list_head *list)
+{
+	list->next->prev = new;
+	new->next = list->next;
+	new->prev = list;
+	list->next = new;
+}
+
+static inline void list_replace(struct list_head *old, struct list_head *new)
+{
+	old->prev->next = new;
+	old->next->prev = new;
+	new->next = old->next;
+	new->prev = old->prev;
+	old->next = old->prev = NULL;
+}
+
+static inline bool list_empty(struct list_head *list)
+{
+	return list->next == list;
+}
+
+#define PIPE_RD 0
+#define PIPE_WR 1
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+#define container_of(ptr, type, member) ({				\
+	const typeof( ((type *)0)->member ) *__mptr = (ptr);		\
+	(type *)( (char *)__mptr - offsetof(type,member) );})
+
+#define list_entry(ptr, type, member)					\
+	container_of(ptr, type, member)
+
+#define list_first_entry(ptr, type, member)				\
+	list_entry((ptr)->next, type, member)
+
+#define list_next_entry(pos, member)					\
+	list_entry((pos)->member.next, typeof(*(pos)), member)
+
+#define list_for_each(pos, head)					\
+	for (pos = (head)->next; pos != (head); pos = pos->next)
+
+#define list_for_each_entry(pos, head, member)				\
+	for (pos = list_first_entry(head, typeof(*pos), member);	\
+	     &pos->member != (head);					\
+	     pos = list_next_entry(pos, member))
+
+#define list_for_each_entry_safe(pos, n, head, member)			\
+	for (pos = list_entry((head)->next, typeof(*pos), member),	\
+	     n = list_entry(pos->member.next, typeof(*pos), member);	\
+	     &pos->member != (head);					\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/*
+#define _cleanup_(x) __attribute__((cleanup(x)))
+
+#define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func)				\
+	static inline void func##p(type *p) {				\
+		if (*p)							\
+			func(*p);					\
+	}								\
+	struct __useless_struct_to_allow_trailing_semicolon__
+
+static inline unsigned
+strv_length(char **strv)
+{
+	unsigned len;
+
+	for (len = 0; strv && *strv; strv++)
+		len++;
+
+	return len;
+}
+
+static inline void strv_free(char **l) {
+	char **k;
+	if (l) {
+		for (k = l; *k; k++)
+			free(k);
+		free(l);
+	}
+}
+DEFINE_TRIVIAL_CLEANUP_FUNC(char **, strv_free);
+#define _cleanup_strv_free_ _cleanup_(strv_freep)
+
+static inline void freep(void *p) {
+	free(*(void**) p);
+}
+#define _cleanup_free_ _cleanup_(freep)
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(int, close);
+#define _cleanup_close_ _cleanup_(closep)
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(FILE *, fclose);
+#define _cleanup_fclose_ _cleanup_(fclosep)
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(DIR *, closedir);
+#define _cleanup_closedir_ _cleanup_(closedirp)
+
+*/
+
+#endif
+