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/* $Id: listener_udp.c 3553 2011-05-05 06:14:19Z nanang $ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 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 "turn.h"
#include <pj/compat/socket.h>
struct read_op
{
pj_ioqueue_op_key_t op_key;
pj_turn_pkt pkt;
};
struct udp_listener
{
pj_turn_listener base;
pj_ioqueue_key_t *key;
unsigned read_cnt;
struct read_op **read_op; /* Array of read_op's */
pj_turn_transport tp; /* Transport instance */
};
static pj_status_t udp_destroy(pj_turn_listener *udp);
static void on_read_complete(pj_ioqueue_key_t *key,
pj_ioqueue_op_key_t *op_key,
pj_ssize_t bytes_read);
static pj_status_t udp_sendto(pj_turn_transport *tp,
const void *packet,
pj_size_t size,
unsigned flag,
const pj_sockaddr_t *addr,
int addr_len);
static void udp_add_ref(pj_turn_transport *tp,
pj_turn_allocation *alloc);
static void udp_dec_ref(pj_turn_transport *tp,
pj_turn_allocation *alloc);
/*
* Create a new listener on the specified port.
*/
PJ_DEF(pj_status_t) pj_turn_listener_create_udp( pj_turn_srv *srv,
int af,
const pj_str_t *bound_addr,
unsigned port,
unsigned concurrency_cnt,
unsigned flags,
pj_turn_listener **p_listener)
{
pj_pool_t *pool;
struct udp_listener *udp;
pj_ioqueue_callback ioqueue_cb;
unsigned i;
pj_status_t status;
/* Create structure */
pool = pj_pool_create(srv->core.pf, "udp%p", 1000, 1000, NULL);
udp = PJ_POOL_ZALLOC_T(pool, struct udp_listener);
udp->base.pool = pool;
udp->base.obj_name = pool->obj_name;
udp->base.server = srv;
udp->base.tp_type = PJ_TURN_TP_UDP;
udp->base.sock = PJ_INVALID_SOCKET;
udp->base.destroy = &udp_destroy;
udp->read_cnt = concurrency_cnt;
udp->base.flags = flags;
udp->tp.obj_name = udp->base.obj_name;
udp->tp.info = udp->base.info;
udp->tp.listener = &udp->base;
udp->tp.sendto = &udp_sendto;
udp->tp.add_ref = &udp_add_ref;
udp->tp.dec_ref = &udp_dec_ref;
/* Create socket */
status = pj_sock_socket(af, pj_SOCK_DGRAM(), 0, &udp->base.sock);
if (status != PJ_SUCCESS)
goto on_error;
/* Init bind address */
status = pj_sockaddr_init(af, &udp->base.addr, bound_addr,
(pj_uint16_t)port);
if (status != PJ_SUCCESS)
goto on_error;
/* Create info */
pj_ansi_strcpy(udp->base.info, "UDP:");
pj_sockaddr_print(&udp->base.addr, udp->base.info+4,
sizeof(udp->base.info)-4, 3);
/* Bind socket */
status = pj_sock_bind(udp->base.sock, &udp->base.addr,
pj_sockaddr_get_len(&udp->base.addr));
if (status != PJ_SUCCESS)
goto on_error;
/* Register to ioqueue */
pj_bzero(&ioqueue_cb, sizeof(ioqueue_cb));
ioqueue_cb.on_read_complete = on_read_complete;
status = pj_ioqueue_register_sock(pool, srv->core.ioqueue, udp->base.sock,
udp, &ioqueue_cb, &udp->key);
/* Create op keys */
udp->read_op = (struct read_op**)pj_pool_calloc(pool, concurrency_cnt,
sizeof(struct read_op*));
/* Create each read_op and kick off read operation */
for (i=0; i<concurrency_cnt; ++i) {
pj_pool_t *rpool = pj_pool_create(srv->core.pf, "rop%p",
1000, 1000, NULL);
udp->read_op[i] = PJ_POOL_ZALLOC_T(pool, struct read_op);
udp->read_op[i]->pkt.pool = rpool;
on_read_complete(udp->key, &udp->read_op[i]->op_key, 0);
}
/* Done */
PJ_LOG(4,(udp->base.obj_name, "Listener %s created", udp->base.info));
*p_listener = &udp->base;
return PJ_SUCCESS;
on_error:
udp_destroy(&udp->base);
return status;
}
/*
* Destroy listener.
*/
static pj_status_t udp_destroy(pj_turn_listener *listener)
{
struct udp_listener *udp = (struct udp_listener *)listener;
unsigned i;
if (udp->key) {
pj_ioqueue_unregister(udp->key);
udp->key = NULL;
udp->base.sock = PJ_INVALID_SOCKET;
} else if (udp->base.sock != PJ_INVALID_SOCKET) {
pj_sock_close(udp->base.sock);
udp->base.sock = PJ_INVALID_SOCKET;
}
for (i=0; i<udp->read_cnt; ++i) {
if (udp->read_op[i]->pkt.pool) {
pj_pool_t *rpool = udp->read_op[i]->pkt.pool;
udp->read_op[i]->pkt.pool = NULL;
pj_pool_release(rpool);
}
}
if (udp->base.pool) {
pj_pool_t *pool = udp->base.pool;
PJ_LOG(4,(udp->base.obj_name, "Listener %s destroyed",
udp->base.info));
udp->base.pool = NULL;
pj_pool_release(pool);
}
return PJ_SUCCESS;
}
/*
* Callback to send packet.
*/
static pj_status_t udp_sendto(pj_turn_transport *tp,
const void *packet,
pj_size_t size,
unsigned flag,
const pj_sockaddr_t *addr,
int addr_len)
{
pj_ssize_t len = size;
return pj_sock_sendto(tp->listener->sock, packet, &len, flag, addr, addr_len);
}
static void udp_add_ref(pj_turn_transport *tp,
pj_turn_allocation *alloc)
{
/* Do nothing */
PJ_UNUSED_ARG(tp);
PJ_UNUSED_ARG(alloc);
}
static void udp_dec_ref(pj_turn_transport *tp,
pj_turn_allocation *alloc)
{
/* Do nothing */
PJ_UNUSED_ARG(tp);
PJ_UNUSED_ARG(alloc);
}
/*
* Callback on received packet.
*/
static void on_read_complete(pj_ioqueue_key_t *key,
pj_ioqueue_op_key_t *op_key,
pj_ssize_t bytes_read)
{
struct udp_listener *udp;
struct read_op *read_op = (struct read_op*) op_key;
pj_status_t status;
udp = (struct udp_listener*) pj_ioqueue_get_user_data(key);
do {
pj_pool_t *rpool;
/* Report to server */
if (bytes_read > 0) {
read_op->pkt.len = bytes_read;
pj_gettimeofday(&read_op->pkt.rx_time);
pj_turn_srv_on_rx_pkt(udp->base.server, &read_op->pkt);
}
/* Reset pool */
rpool = read_op->pkt.pool;
pj_pool_reset(rpool);
read_op->pkt.pool = rpool;
read_op->pkt.transport = &udp->tp;
read_op->pkt.src.tp_type = udp->base.tp_type;
/* Read next packet */
bytes_read = sizeof(read_op->pkt.pkt);
read_op->pkt.src_addr_len = sizeof(read_op->pkt.src.clt_addr);
pj_bzero(&read_op->pkt.src.clt_addr, sizeof(read_op->pkt.src.clt_addr));
status = pj_ioqueue_recvfrom(udp->key, op_key,
read_op->pkt.pkt, &bytes_read, 0,
&read_op->pkt.src.clt_addr,
&read_op->pkt.src_addr_len);
if (status != PJ_EPENDING && status != PJ_SUCCESS)
bytes_read = -status;
} while (status != PJ_EPENDING && status != PJ_ECANCELLED &&
status != PJ_STATUS_FROM_OS(PJ_BLOCKING_ERROR_VAL));
}
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