static int login_proxy_connect(struct login_proxy *proxy)
{
struct login_proxy_record *rec;
rec = login_proxy_state_get(proxy_state, &proxy->ip, proxy->port);
if (timeval_cmp(&rec->last_failure, &rec->last_success) > 0 &&
rec->last_failure.tv_sec - rec->last_success.tv_sec > PROXY_IMMEDIATE_FAILURE_SECS &&
rec->num_waiting_connections != 0) {
/* the server is down. fail immediately */
i_error("proxy(%s): Host %s:%u is down",
proxy->client->virtual_user, proxy->host, proxy->port);
login_proxy_free(&proxy);
return -1;
}
proxy->server_fd = net_connect_ip(&proxy->ip, proxy->port, NULL);
if (proxy->server_fd == -1) {
proxy_log_connect_error(proxy);
login_proxy_free(&proxy);
return -1;
}
proxy->server_io = io_add(proxy->server_fd, IO_WRITE,
proxy_wait_connect, proxy);
if (proxy->connect_timeout_msecs != 0) {
proxy->to = timeout_add(proxy->connect_timeout_msecs,
proxy_connect_timeout, proxy);
}
proxy->state_rec = rec;
proxy->state_rec->num_waiting_connections++;
return 0;
}
int login_proxy_new(struct client *client,
const struct login_proxy_settings *set,
proxy_callback_t *callback)
{
struct login_proxy *proxy;
i_assert(client->login_proxy == NULL);
if (set->host == NULL || *set->host == '\0') {
i_error("proxy(%s): host not given", client->virtual_user);
return -1;
}
if (client->proxy_ttl <= 1) {
i_error("proxy(%s): TTL reached zero - "
"proxies appear to be looping?", client->virtual_user);
return -1;
}
proxy = i_new(struct login_proxy, 1);
proxy->client = client;
proxy->client_fd = -1;
proxy->server_fd = -1;
proxy->created = ioloop_timeval;
proxy->ip = set->ip;
proxy->source_ip = set->source_ip;
proxy->host = i_strdup(set->host);
proxy->port = set->port;
proxy->connect_timeout_msecs = set->connect_timeout_msecs;
proxy->notify_refresh_secs = set->notify_refresh_secs;
proxy->ssl_flags = set->ssl_flags;
proxy->state_rec = login_proxy_state_get(proxy_state, &proxy->ip,
proxy->port);
client_ref(client);
if (set->ip.family == 0 &&
net_addr2ip(set->host, &proxy->ip) < 0) {
i_error("proxy(%s): BUG: host %s is not an IP "
"(auth should have changed it)",
client->virtual_user, set->host);
} else {
if (login_proxy_connect(proxy) < 0)
return -1;
}
DLLIST_PREPEND(&login_proxies_pending, proxy);
proxy->callback = callback;
client->login_proxy = proxy;
return 0;
}
int login_proxy_new(struct client *client,
const struct login_proxy_settings *set,
proxy_callback_t *callback)
{
struct login_proxy *proxy;
i_assert(client->login_proxy == NULL);
if (set->host == NULL || *set->host == '\0') {
client_log_err(client, t_strdup_printf(
"proxy(%s): host not given", client->virtual_user));
return -1;
}
if (client->proxy_ttl <= 1) {
client_log_err(client, t_strdup_printf(
"proxy(%s): TTL reached zero - "
"proxies appear to be looping?", client->virtual_user));
return -1;
}
proxy = i_new(struct login_proxy, 1);
proxy->client = client;
proxy->client_fd = -1;
proxy->server_fd = -1;
proxy->created = ioloop_timeval;
proxy->ip = set->ip;
proxy->source_ip = set->source_ip;
proxy->host = i_strdup(set->host);
proxy->port = set->port;
proxy->connect_timeout_msecs = set->connect_timeout_msecs;
proxy->notify_refresh_secs = set->notify_refresh_secs;
proxy->ssl_flags = set->ssl_flags;
proxy->state_rec = login_proxy_state_get(proxy_state, &proxy->ip,
proxy->port);
client_ref(client);
if (login_proxy_connect(proxy) < 0) {
login_proxy_free(&proxy);
return -1;
}
DLLIST_PREPEND(&login_proxies_pending, proxy);
proxy->callback = callback;
client->login_proxy = proxy;
return 0;
}
