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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)
{
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";
tmp = val * 10;
if (val > 1125899906842624ULL) {
if (val > (9223372036854775807ULL / 10))
tmp = val / 112589990684262ULL;
else
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;
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];
fprintf(stderr, "%s: %s\n", __func__, proxy->scfg->name);
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);
fprintf(stderr, "%s: proxy connection %s -> %s closed (CtS: %s, StC: %s), duration %s\n",
proxy->scfg->name, proxy->clientstr, proxy->serverstr, 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);
fprintf(stderr, "%s: %s client connection closed\n", __func__, proxy->scfg->name);
}
static void
proxy_server_free(struct uring_task *task)
{
struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
fprintf(stderr, "%s: %s server connection closed\n", __func__, proxy->scfg->name);
}
void
proxy_delete(struct cfg *cfg, struct server_proxy *proxy)
{
fprintf(stderr, "%s: shutting down proxy 0x%p\n", __func__, proxy);
/* FIXME: review half-open proxy situation */
if (proxy->servertask.fd >= 0)
uring_cancel(cfg, &proxy->servertask);
if (proxy->clienttask.fd >= 0)
uring_cancel(cfg, &proxy->clienttask);
uring_task_put(cfg, &proxy->servertask);
uring_task_put(cfg, &proxy->clienttask);
uring_task_put(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);
fprintf(stderr, "%s: result was %i\n", __func__, res);
if (res <= 0) {
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);
fprintf(stderr, "%s: result was %i\n", __func__, res);
if (res <= 0) {
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);
fprintf(stderr, "%s: result was %i\n", __func__, res);
if (res <= 0) {
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);
fprintf(stderr, "%s: result was %i\n", __func__, res);
if (res <= 0) {
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_connect_next_remote(struct cfg *cfg, struct server_proxy *proxy);
static void
proxy_server_connected(struct cfg *cfg, struct uring_task *task, int res)
{
struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
fprintf(stderr, "%s: connected %i\n", __func__, res);
if (res < 0) {
proxy->sfd = -1;
uring_task_close_fd(cfg, task);
proxy_connect_next_remote(cfg, proxy);
return;
}
fprintf(stderr, "%s: proxy connection %s -> %s opened\n",
proxy->scfg->name, proxy->clientstr, proxy->serverstr);
proxy->begin = time(NULL);
uring_tbuf_read(cfg, &proxy->clienttask, proxy_client_data_in);
uring_tbuf_read(cfg, &proxy->servertask, proxy_server_data_in);
}
static void
proxy_connect_next_remote(struct cfg *cfg, struct server_proxy *proxy)
{
struct sockaddr_in46 *remote, *tmp;
struct server *scfg = proxy->scfg;
int sfd;
unsigned i = 0;
again:
remote = NULL;
list_for_each_entry(tmp, &scfg->remotes, list) {
if (i == proxy->next_remote) {
remote = tmp;
break;
}
i++;
}
if (!remote) {
fprintf(stderr, "No more remote addresses to attempt\n");
/* FIXME: put tasks */
return;
}
proxy->next_remote++;
proxy->server = *remote;
sockaddr_to_str(&proxy->server, proxy->serverstr, sizeof(proxy->serverstr));
fprintf(stderr, "%s: attempting proxy connection to %s (len %u)\n",
scfg->name, proxy->serverstr, proxy->server.addrlen);
sfd = socket(proxy->server.storage.ss_family, SOCK_STREAM, 0);
if (sfd < 0) {
perror("socket");
goto again;
}
proxy->sfd = sfd;
uring_task_set_fd(&proxy->servertask, sfd);
uring_connect(cfg, &proxy->servertask, &proxy->server, proxy_server_connected);
}
struct server_proxy *
proxy_new(struct cfg *cfg, struct server *scfg, struct sockaddr_in46 *client, int fd)
{
struct server_proxy *proxy;
proxy = zmalloc(sizeof(*proxy));
if (!proxy) {
perror("malloc");
return NULL;
}
proxy->sfd = -1;
proxy->cfd = fd;
proxy->scfg = scfg;
proxy->client = *client;
uring_task_init(&proxy->task, "proxy", &scfg->task, proxy_free);
sockaddr_to_str(&proxy->client, proxy->clientstr, sizeof(proxy->clientstr));
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, &scfg->proxys);
proxy_connect_next_remote(cfg, proxy);
return proxy;
}
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