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#include <stdio.h>
#include <time.h>
#include "main.h"
#include "uring.h"
#include "server.h"
#include "proxy.h"
#include "utils.h"
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
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 cfg *cfg, struct server_proxy *proxy)
{
debug(DBG_PROXY, "%s: shutting down proxy %p", proxy->server->name, proxy);
assert_return(cfg && proxy);
uring_task_destroy(cfg, &proxy->servertask);
uring_task_destroy(cfg, &proxy->clienttask);
uring_task_destroy(cfg, &proxy->task);
}
static void proxy_client_data_in(struct cfg *cfg, struct uring_task *task, int res);
static void
proxy_client_data_out(struct cfg *cfg, struct uring_task *task, int res)
{
struct server_proxy *proxy = container_of(task, struct server_proxy, clienttask);
assert_return(cfg && task);
assert_task_alive(DBG_PROXY, task);
if (res <= 0) {
debug(DBG_PROXY, "%s: result was %i", proxy->server->name, res);
uring_task_close_fd(cfg, task);
proxy_delete(cfg, proxy);
return;
}
proxy->client_bytes += res;
uring_task_set_fd(&proxy->clienttask, proxy->cfd);
uring_tbuf_read(cfg, task, proxy_client_data_in);
}
static void
proxy_client_data_in(struct cfg *cfg, struct uring_task *task, int res)
{
struct server_proxy *proxy = container_of(task, struct server_proxy, clienttask);
assert_return(cfg && task);
assert_task_alive(DBG_PROXY, task);
if (res <= 0) {
debug(DBG_PROXY, "%s: result was %i", proxy->server->name, res);
uring_task_close_fd(cfg, task);
proxy_delete(cfg, proxy);
return;
}
uring_task_set_fd(&proxy->clienttask, proxy->sfd);
uring_tbuf_write(cfg, task, proxy_client_data_out);
}
static void proxy_server_data_in(struct cfg *cfg, struct uring_task *task,
int res);
static void
proxy_server_data_out(struct cfg *cfg, struct uring_task *task, int res)
{
struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
assert_return(cfg && task);
assert_task_alive(DBG_PROXY, task);
if (res <= 0) {
debug(DBG_PROXY, "%s: result was %i", proxy->server->name, res);
uring_task_close_fd(cfg, task);
proxy_delete(cfg, proxy);
return;
}
proxy->server_bytes += res;
uring_task_set_fd(&proxy->servertask, proxy->sfd);
uring_tbuf_read(cfg, &proxy->servertask, proxy_server_data_in);
}
static void
proxy_server_data_in(struct cfg *cfg, struct uring_task *task, int res)
{
struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
assert_return(cfg && task);
assert_task_alive(DBG_PROXY, task);
if (res <= 0) {
debug(DBG_PROXY, "%s: result was %i", proxy->server->name, res);
uring_task_close_fd(cfg, task);
proxy_delete(cfg, proxy);
return;
}
uring_task_set_fd(&proxy->servertask, proxy->cfd);
uring_tbuf_write(cfg, task, proxy_server_data_out);
}
static void
proxy_connected_cb(struct cfg *cfg, struct connection *conn, bool connected)
{
struct server_proxy *proxy = container_of(conn, struct server_proxy, server_conn);
assert_return(cfg && conn);
assert_task_alive(DBG_PROXY, &proxy->clienttask);
assert_task_alive(DBG_PROXY, &proxy->servertask);
if (!connected) {
error("%s: proxy connection to remote server failed",
proxy->server->name);
proxy_delete(cfg, proxy);
return;
}
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);
uring_tbuf_read(cfg, &proxy->clienttask, proxy_client_data_in);
uring_tbuf_read(cfg, &proxy->servertask, proxy_server_data_in);
}
struct server_proxy *
proxy_new(struct cfg *cfg, struct server *server, struct saddr *client, int fd)
{
struct server_proxy *proxy;
assert_return(cfg && server && client && fd > 0, NULL);
proxy = zmalloc(sizeof(*proxy));
if (!proxy) {
error("malloc: %m");
return NULL;
}
proxy->sfd = -1;
proxy->cfd = fd;
proxy->server = server;
uring_task_init(cfg, &proxy->task, "proxy", &server->task, proxy_free);
connection_set_local(cfg, &proxy->client_conn, fd);
connection_set_remote(cfg, &proxy->client_conn, client);
uring_task_init(cfg, &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(cfg, &proxy->servertask, "proxy_server", &proxy->task,
proxy_server_free);
uring_task_set_buf(&proxy->servertask, &proxy->serverbuf);
list_add(&proxy->list, &server->proxys);
connect_any(cfg, &proxy->servertask, &server->remotes,
&proxy->server_conn, proxy_connected_cb);
return proxy;
}
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