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/* $Id$ */
/*
* Copyright (C) 2003-2005 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "server.h"
#define THIS_FILE "bind_usage.c"
static void usage_on_rx_data(pj_stun_usage *usage,
void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len);
static void usage_on_destroy(pj_stun_usage *usage);
static pj_status_t sess_on_send_msg(pj_stun_session *sess,
const void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *dst_addr,
unsigned addr_len);
static pj_status_t sess_on_rx_request(pj_stun_session *sess,
const pj_uint8_t *pkt,
unsigned pkt_len,
const pj_stun_msg *msg,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len);
struct bind_usage
{
pj_pool_t *pool;
pj_stun_usage *usage;
pj_stun_session *session;
};
PJ_DEF(pj_status_t) pj_stun_bind_usage_create(pj_stun_server *srv,
const pj_str_t *ip_addr,
unsigned port,
pj_stun_usage **p_bu)
{
pj_pool_t *pool;
struct bind_usage *bu;
pj_stun_server_info *si;
pj_stun_usage_cb usage_cb;
pj_stun_session_cb sess_cb;
pj_sockaddr_in local_addr;
pj_status_t status;
si = pj_stun_server_get_info(srv);
pool = pj_pool_create(si->pf, "bind%p", 128, 128, NULL);
bu = PJ_POOL_ZALLOC_T(pool, struct bind_usage);
bu->pool = pool;
status = pj_sockaddr_in_init(&local_addr, ip_addr, (pj_uint16_t)port);
if (status != PJ_SUCCESS)
return status;
pj_bzero(&usage_cb, sizeof(usage_cb));
usage_cb.on_rx_data = &usage_on_rx_data;
usage_cb.on_destroy = &usage_on_destroy;
status = pj_stun_usage_create(srv, "bind%p", &usage_cb,
PJ_AF_INET, PJ_SOCK_DGRAM, 0,
&local_addr, sizeof(local_addr),
&bu->usage);
if (status != PJ_SUCCESS) {
pj_pool_release(pool);
return status;
}
pj_bzero(&sess_cb, sizeof(sess_cb));
sess_cb.on_send_msg = &sess_on_send_msg;
sess_cb.on_rx_request = &sess_on_rx_request;
status = pj_stun_session_create(&si->stun_cfg, "bind%p", &sess_cb,
PJ_FALSE, &bu->session);
if (status != PJ_SUCCESS) {
pj_stun_usage_destroy(bu->usage);
return status;
}
pj_stun_usage_set_user_data(bu->usage, bu);
pj_stun_session_set_user_data(bu->session, bu);
if (p_bu)
*p_bu = bu->usage;
return PJ_SUCCESS;
}
static void usage_on_rx_data(pj_stun_usage *usage,
void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len)
{
struct bind_usage *bu;
pj_stun_session *session;
pj_status_t status;
bu = (struct bind_usage*) pj_stun_usage_get_user_data(usage);
session = bu->session;
/* Handle packet to session */
status = pj_stun_session_on_rx_pkt(session, (pj_uint8_t*)pkt, pkt_size,
PJ_STUN_IS_DATAGRAM | PJ_STUN_CHECK_PACKET,
NULL, src_addr, src_addr_len);
if (status != PJ_SUCCESS) {
pj_stun_perror(THIS_FILE, "Error handling incoming packet", status);
return;
}
}
static pj_status_t sess_on_send_msg(pj_stun_session *sess,
const void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *dst_addr,
unsigned addr_len)
{
struct bind_usage *bu;
pj_stun_usage *usage;
bu = (struct bind_usage*) pj_stun_session_get_user_data(sess);
usage = bu->usage;
return pj_stun_usage_sendto(usage, pkt, pkt_size, 0,
dst_addr, addr_len);
}
static pj_status_t sess_on_rx_request(pj_stun_session *sess,
const pj_uint8_t *pkt,
unsigned pkt_len,
const pj_stun_msg *msg,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len)
{
pj_stun_tx_data *tdata;
pj_status_t status;
PJ_UNUSED_ARG(pkt);
PJ_UNUSED_ARG(pkt_len);
/* Create response */
status = pj_stun_session_create_response(sess, msg, 0, NULL, &tdata);
if (status != PJ_SUCCESS)
return status;
/* Create MAPPED-ADDRESS attribute */
status = pj_stun_msg_add_sockaddr_attr(tdata->pool, tdata->msg,
PJ_STUN_ATTR_MAPPED_ADDR,
PJ_FALSE,
src_addr, src_addr_len);
if (status != PJ_SUCCESS) {
pj_stun_perror(THIS_FILE, "Error creating response", status);
pj_stun_msg_destroy_tdata(sess, tdata);
return status;
}
/* On the presence of magic, create XOR-MAPPED-ADDRESS attribute */
if (msg->hdr.magic == PJ_STUN_MAGIC) {
status =
pj_stun_msg_add_sockaddr_attr(tdata->pool, tdata->msg,
PJ_STUN_ATTR_XOR_MAPPED_ADDR,
PJ_TRUE,
src_addr, src_addr_len);
if (status != PJ_SUCCESS) {
pj_stun_perror(THIS_FILE, "Error creating response", status);
pj_stun_msg_destroy_tdata(sess, tdata);
return status;
}
}
/* Send */
status = pj_stun_session_send_msg(sess, PJ_TRUE,
src_addr, src_addr_len, tdata);
return status;
}
static void usage_on_destroy(pj_stun_usage *usage)
{
struct bind_usage *bu;
bu = (struct bind_usage*) pj_stun_usage_get_user_data(usage);
if (bu==NULL)
return;
pj_stun_session_destroy(bu->session);
pj_pool_release(bu->pool);
}
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