Split directories better

1 files changed, 0 insertions, 740 deletions

diff --git a/main.c b/main.c
deleted file mode 100644
index 047e70e..0000000
--- a/main.c
+++ /dev/null
@@ -1,740 +0,0 @@
-#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);
-}