/*
* Internal callback used to establish an outbound connection.
*/
static void net_connect_job_internal_cb(struct net_connection* con, int event, void* ptr)
{
int ret;
struct net_connect_job* job = net_con_get_ptr(con);
struct net_connect_job* next_job = job->next;
struct net_connect_handle* handle = job->handle;
if (event == NET_EVENT_TIMEOUT)
{
// FIXME: Try next address, or if no more addresses left declare failure to connect.
if (job->addr.ss_family == AF_INET6)
{
net_connect_job_stop(job);
if (!next_job)
{
LOG_TRACE("No more IPv6 addresses to try!");
}
}
else
{
net_connect_job_stop(job);
if (!next_job)
{
LOG_TRACE("No more IPv4 addresses to try!");
}
}
if (net_connect_depleted(handle))
{
LOG_TRACE("No more addresses left. Unable to connect!");
net_connect_callback(handle, net_connect_status_timeout, NULL);
}
return;
}
if (event == NET_EVENT_WRITE)
{
net_connect_job_process(job);
}
}
static void event_callback(struct net_connection* con, int events, void *arg)
{
ADC_TRACE;
struct ADC_client* client = (struct ADC_client*) net_con_get_ptr(con);
switch (client->state)
{
case ps_conn:
if (events == NET_EVENT_TIMEOUT)
{
client->callback(client, ADC_CLIENT_DISCONNECTED, 0);
return;
}
break;
#ifdef SSL_SUPPORT
case ps_conn_ssl:
if (events == NET_EVENT_TIMEOUT)
{
client->callback(client, ADC_CLIENT_DISCONNECTED, 0);
return;
}
ADC_client_on_connected_ssl(client);
break;
#endif
default:
if (events & NET_EVENT_READ)
{
if (ADC_client_recv(client) == -1)
{
ADC_client_on_disconnected(client);
}
}
if (events & NET_EVENT_WRITE)
{
ADC_client_send_queue(client);
}
}
}
static void probe_net_event(struct net_connection* con, int events, void *arg)
{
struct hub_probe* probe = (struct hub_probe*) net_con_get_ptr(con);
if (events == NET_EVENT_TIMEOUT)
{
char buf[512];
ssize_t len = snprintf(buf, sizeof(buf), "This hub runs on ADC protocol only!\n\nThese are the possible reasons why you see this message:\n\n * you used address without protocol specification, e.g. example.com:1234 instead of adc://example.com:1234\n * your client does not support ADC protocol.\n|$ForceMove %s|", probe->hub->config->nmdc_only_redirect_addr);
net_con_send(con, buf, (size_t) len);
probe_destroy(probe);
return;
}
if (events & NET_EVENT_READ)
{
int bytes = net_con_peek(con, probe_recvbuf, PROBE_RECV_SIZE);
if (bytes < 0)
{
probe_destroy(probe);
return;
}
if (bytes >= 4)
{
if (memcmp(probe_recvbuf, "HSUP", 4) == 0)
{
LOG_TRACE("Probed ADC");
#ifdef SSL_SUPPORT
if (probe->hub->config->tls_enable && probe->hub->config->tls_require)
{
LOG_TRACE("Not TLS connection - closing connection.");
if (*probe->hub->config->tls_require_redirect_addr)
{
char buf[512];
ssize_t len = snprintf(buf, sizeof(buf), "ISUP " ADC_PROTO_SUPPORT "\nISID AAAB\nIINF NIRedirecting...\nIQUI AAAB RD%s\n", probe->hub->config->tls_require_redirect_addr);
net_con_send(con, buf, (size_t) len);
LOG_TRACE("Not TLS connection - Redirecting to %s.", probe->hub->config->tls_require_redirect_addr);
}
else
{
LOG_TRACE("Not TLS connection - closing connection.");
}
}
else
#endif
if (user_create(probe->hub, probe->connection, &probe->addr))
{
probe->connection = 0;
}
probe_destroy(probe);
return;
}
else if ((memcmp(probe_recvbuf, "GET ", 4) == 0) ||
(memcmp(probe_recvbuf, "POST", 4) == 0) ||
(memcmp(probe_recvbuf, "HEAD", 4) == 0))
{
/* Looks like HTTP - Not supported, but we log it. */
LOG_TRACE("Probed HTTP connection. Not supported closing connection (%s)", ip_convert_to_string(&probe->addr));
const char* buf = "501 Not implemented\r\n\r\n";
net_con_send(con, buf, strlen(buf));
}
#ifdef SSL_SUPPORT
else if (bytes >= 11 &&
probe_recvbuf[0] == 22 &&
probe_recvbuf[1] == 3 && /* protocol major version */
probe_recvbuf[5] == 1 && /* message type */
probe_recvbuf[9] == probe_recvbuf[1])
{
if (probe->hub->config->tls_enable)
{
LOG_TRACE("Probed TLS %d.%d connection", (int) probe_recvbuf[1], (int) probe_recvbuf[2]);
if (user_create(probe->hub, probe->connection, &probe->addr))
{
probe->connection = 0;
}
net_con_ssl_handshake(con, net_con_ssl_mode_server, probe->hub->ctx);
}
else
{
LOG_TRACE("Probed TLS %d.%d connection. TLS disabled in hub.", (int) probe_recvbuf[9], (int) probe_recvbuf[10]);
}
}
else
{
LOG_TRACE("Probed unsupported protocol: %x%x%x%x.", (int) probe_recvbuf[0], (int) probe_recvbuf[1], (int) probe_recvbuf[2], (int) probe_recvbuf[3]);
}
#endif
probe_destroy(probe);
return;
}
}
}
