/*
* This file is part of the Nice GLib ICE library.
*
* (C) 2008-2012 Collabora Ltd.
* Contact: Youness Alaoui
* (C) 2008-2009 Nokia Corporation. All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Nice GLib ICE library.
*
* The Initial Developers of the Original Code are Collabora Ltd and Nokia
* Corporation. All Rights Reserved.
*
* Contributors:
* Youness Alaoui, Collabora Ltd.
* George Kiagiadakis, Collabora Ltd.
*
* Alternatively, the contents of this file may be used under the terms of the
* the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
* case the provisions of LGPL are applicable instead of those above. If you
* wish to allow use of your version of this file only under the terms of the
* LGPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replace
* them with the notice and other provisions required by the LGPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the LGPL.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "tcp-passive.h"
#include "agent-priv.h"
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#ifndef G_OS_WIN32
#include <unistd.h>
#endif
/* FIXME: This should be defined in gio/gnetworking.h, which we should include;
* but we cannot do that without refactoring.
* (See: https://phabricator.freedesktop.org/D230). */
#undef TCP_NODELAY
#define TCP_NODELAY 1
typedef struct {
GMainContext *context;
GHashTable *connections;
NiceSocketWritableCb writable_cb;
gpointer writable_data;
} TcpPassivePriv;
static void socket_close (NiceSocket *sock);
static gint socket_recv_messages (NiceSocket *sock,
NiceInputMessage *recv_messages, guint n_recv_messages);
static gint socket_send_messages (NiceSocket *sock, const NiceAddress *to,
const NiceOutputMessage *messages, guint n_messages);
static gint socket_send_messages_reliable (NiceSocket *sock,
const NiceAddress *to, const NiceOutputMessage *messages, guint n_messages);
static gboolean socket_is_reliable (NiceSocket *sock);
static gboolean socket_can_send (NiceSocket *sock, NiceAddress *addr);
static void socket_set_writable_callback (NiceSocket *sock,
NiceSocketWritableCb callback, gpointer user_data);
static guint nice_address_hash (const NiceAddress * key);
NiceSocket *
nice_tcp_passive_socket_new (GMainContext *ctx, NiceAddress *addr)
{
union {
struct sockaddr_storage storage;
struct sockaddr addr;
} name;
NiceSocket *sock;
TcpPassivePriv *priv;
GSocket *gsock = NULL;
gboolean gret = FALSE;
GSocketAddress *gaddr;
if (addr != NULL) {
nice_address_copy_to_sockaddr(addr, &name.addr);
} else {
memset (&name, 0, sizeof (name));
name.storage.ss_family = AF_UNSPEC;
}
if (name.storage.ss_family == AF_UNSPEC || name.storage.ss_family == AF_INET) {
gsock = g_socket_new (G_SOCKET_FAMILY_IPV4, G_SOCKET_TYPE_STREAM,
G_SOCKET_PROTOCOL_TCP, NULL);
name.storage.ss_family = AF_INET;
#ifdef HAVE_SA_LEN
name.storage.ss_len = sizeof (struct sockaddr_in);
#endif
} else if (name.storage.ss_family == AF_INET6) {
gsock = g_socket_new (G_SOCKET_FAMILY_IPV6, G_SOCKET_TYPE_STREAM,
G_SOCKET_PROTOCOL_TCP, NULL);
name.storage.ss_family = AF_INET6;
#ifdef HAVE_SA_LEN
name.storage.ss_len = sizeof (struct sockaddr_in6);
#endif
}
if (gsock == NULL) {
return NULL;
}
gaddr = g_socket_address_new_from_native (&name.addr, sizeof (name));
if (gaddr == NULL) {
g_object_unref (gsock);
return NULL;
}
/* GSocket: All socket file descriptors are set to be close-on-exec. */
g_socket_set_blocking (gsock, false);
gret = g_socket_bind (gsock, gaddr, FALSE, NULL) &&
g_socket_listen (gsock, NULL);
g_object_unref (gaddr);
if (gret == FALSE) {
g_socket_close (gsock, NULL);
g_object_unref (gsock);
return NULL;
}
gaddr = g_socket_get_local_address (gsock, NULL);
if (gaddr == NULL ||
!g_socket_address_to_native (gaddr, &name.addr, sizeof (name), NULL)) {
g_socket_close (gsock, NULL);
g_object_unref (gsock);
return NULL;
}
g_object_unref (gaddr);
if (ctx == NULL) {
ctx = g_main_context_default ();
}
sock = g_slice_new0 (NiceSocket);
nice_address_set_from_sockaddr (&sock->addr, &name.addr);
sock->priv = priv = g_slice_new0 (TcpPassivePriv);
priv->context = g_main_context_ref (ctx);
priv->connections = g_hash_table_new_full ((GHashFunc) nice_address_hash,
(GEqualFunc) nice_address_equal, (
GDestroyNotify) nice_address_free, NULL);
priv->writable_cb = NULL;
priv->writable_data = NULL;
sock->type = NICE_SOCKET_TYPE_TCP_PASSIVE;
sock->fileno = gsock;
sock->send_messages = socket_send_messages;
sock->send_messages_reliable = socket_send_messages_reliable;
sock->recv_messages = socket_recv_messages;
sock->is_reliable = socket_is_reliable;
sock->can_send = socket_can_send;
sock->set_writable_callback = socket_set_writable_callback;
sock->close = socket_close;
return sock;
}
static void
socket_close (NiceSocket *sock)
{
TcpPassivePriv *priv = sock->priv;
if (sock->fileno != NULL) {
g_socket_close (sock->fileno, NULL);
g_object_unref (sock->fileno);
sock->fileno = NULL;
}
if (priv->context)
g_main_context_unref (priv->context);
g_hash_table_unref (priv->connections);
g_slice_free (TcpPassivePriv, sock->priv);
}
static gint socket_recv_messages (NiceSocket *sock,
NiceInputMessage *recv_messages, guint n_recv_messages)
{
return -1;
}
static gint socket_send_messages (NiceSocket *sock, const NiceAddress *to,
const NiceOutputMessage *messages, guint n_messages)
{
TcpPassivePriv *priv = sock->priv;
if (to) {
NiceSocket *peer_socket = g_hash_table_lookup (priv->connections, to);
if (peer_socket)
return nice_socket_send_messages (peer_socket, to, messages, n_messages);
}
return -1;
}
static gint socket_send_messages_reliable (NiceSocket *sock,
const NiceAddress *to, const NiceOutputMessage *messages, guint n_messages)
{
TcpPassivePriv *priv = sock->priv;
if (to) {
NiceSocket *peer_socket = g_hash_table_lookup (priv->connections, to);
if (peer_socket)
return nice_socket_send_messages_reliable (peer_socket, to, messages,
n_messages);
}
return -1;
}
static gboolean
socket_is_reliable (NiceSocket *sock)
{
return TRUE;
}
static gboolean
socket_can_send (NiceSocket *sock, NiceAddress *addr)
{
TcpPassivePriv *priv = sock->priv;
NiceSocket *peer_socket = NULL;
/* FIXME: Danger if child socket was closed */
if (addr)
peer_socket = g_hash_table_lookup (priv->connections, addr);
if (peer_socket)
return nice_socket_can_send (peer_socket, addr);
return FALSE;
}
static void
_child_writable_cb (NiceSocket *child, gpointer data)
{
NiceSocket *sock = data;
TcpPassivePriv *priv = sock->priv;
if (priv->writable_cb)
priv->writable_cb (sock, priv->writable_data);
}
static void
socket_set_writable_callback (NiceSocket *sock,
NiceSocketWritableCb callback, gpointer user_data)
{
TcpPassivePriv *priv = sock->priv;
priv->writable_cb = callback;
priv->writable_data = user_data;
}
NiceSocket *
nice_tcp_passive_socket_accept (NiceSocket *sock)
{
union {
struct sockaddr_storage storage;
struct sockaddr addr;
} name;
TcpPassivePriv *priv = sock->priv;
GSocket *gsock = NULL;
GSocketAddress *gaddr;
NiceAddress remote_addr;
NiceSocket *new_socket = NULL;
gsock = g_socket_accept (sock->fileno, NULL, NULL);
if (gsock == NULL) {
return NULL;
}
/* GSocket: All socket file descriptors are set to be close-on-exec. */
g_socket_set_blocking (gsock, false);
/* setting TCP_NODELAY to TRUE in order to avoid packet batching */
g_socket_set_option (gsock, IPPROTO_TCP, TCP_NODELAY, TRUE, NULL);
gaddr = g_socket_get_remote_address (gsock, NULL);
if (gaddr == NULL ||
!g_socket_address_to_native (gaddr, &name.addr, sizeof (name), NULL)) {
g_socket_close (gsock, NULL);
g_object_unref (gsock);
return NULL;
}
g_object_unref (gaddr);
nice_address_set_from_sockaddr (&remote_addr, &name.addr);
new_socket = nice_tcp_bsd_socket_new_from_gsock (priv->context, gsock,
&sock->addr, &remote_addr, TRUE);
g_object_unref (gsock);
if (new_socket) {
NiceAddress *key = nice_address_dup (&remote_addr);
nice_tcp_bsd_socket_set_passive_parent (new_socket, sock);
nice_socket_set_writable_callback (new_socket, _child_writable_cb, sock);
g_hash_table_insert (priv->connections, key, new_socket);
}
return new_socket;
}
static guint nice_address_hash (const NiceAddress * key)
{
gchar ip[INET6_ADDRSTRLEN];
gchar *str;
guint hash;
nice_address_to_string (key, ip);
str = g_strdup_printf ("%s:%u", ip, nice_address_get_port (key));
hash = g_str_hash (str);
g_free (str);
return hash;
}
void nice_tcp_passive_socket_remove_connection (NiceSocket *sock, const NiceAddress *to)
{
TcpPassivePriv *priv = sock->priv;
g_hash_table_remove (priv->connections, to);
}