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#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->clienttask);
uring_task_refdump(&proxy->servertask);
}
static void
proxy_client_free(struct uring_task *task)
{
struct server_proxy *proxy = container_of(task, struct server_proxy, clienttask);
fprintf(stderr, "%s: %s\n", __func__, proxy->scfg->name);
/*
list_del(&proxy->list);
free(proxy);
*/
}
static void
proxy_server_free(struct uring_task *task)
{
struct server_proxy *proxy = container_of(task, struct server_proxy, servertask);
fprintf(stderr, "%s: %s\n", __func__, proxy->scfg->name);
/*
list_del(&proxy->list);
free(proxy);
*/
}
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)
return;
if (res != proxy->clientlen) {
fprintf(stderr, "%s: short write\n", __func__);
return;
}
uring_task_set_fd(&proxy->clienttask, proxy->cfd);
uring_read(cfg, task, proxy->clientbuf, sizeof(proxy->clientbuf), 0, 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)
return;
proxy->clientlen = res;
uring_task_set_fd(&proxy->clienttask, proxy->sfd);
uring_write(cfg, task, proxy->clientbuf, res, 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)
return;
if (res != proxy->serverlen) {
fprintf(stderr, "%s: short write\n", __func__);
return;
}
uring_task_set_fd(&proxy->servertask, proxy->sfd);
uring_read(cfg, task, proxy->serverbuf, sizeof(proxy->serverbuf), 0, 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)
return;
proxy->serverlen = res;
uring_task_set_fd(&proxy->servertask, proxy->cfd);
uring_write(cfg, task, proxy->serverbuf, res, 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_connect_next_remote(cfg, proxy);
return;
}
uring_read(cfg, &proxy->clienttask, proxy->clientbuf, sizeof(proxy->clientbuf), 0, proxy_client_data_in);
uring_read(cfg, &proxy->servertask, proxy->serverbuf, sizeof(proxy->serverbuf), 0, 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;
sockaddr_to_str(&proxy->client, proxy->clientstr, sizeof(proxy->clientstr));
uring_task_init(&proxy->clienttask, "proxy_client", &scfg->task, proxy_client_free);
uring_task_init(&proxy->servertask, "proxy_server", &scfg->task, proxy_server_free);
uring_task_set_fd(&proxy->clienttask, fd);
list_add(&proxy->list, &scfg->proxys);
proxy_connect_next_remote(cfg, proxy);
return proxy;
}
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