| /* $Id$ */ |
| /* |
| * 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 <pjnath/turn_sock.h> |
| #include <pj/activesock.h> |
| #include <pj/assert.h> |
| #include <pj/errno.h> |
| #include <pj/lock.h> |
| #include <pj/log.h> |
| #include <pj/pool.h> |
| #include <pj/ioqueue.h> |
| |
| enum |
| { |
| TIMER_NONE, |
| TIMER_DESTROY |
| }; |
| |
| |
| enum { MAX_BIND_RETRY = 100 }; |
| |
| |
| #define INIT 0x1FFFFFFF |
| |
| struct pj_turn_sock |
| { |
| pj_pool_t *pool; |
| const char *obj_name; |
| pj_turn_session *sess; |
| pj_turn_sock_cb cb; |
| void *user_data; |
| |
| pj_bool_t is_destroying; |
| pj_grp_lock_t *grp_lock; |
| |
| pj_turn_alloc_param alloc_param; |
| pj_stun_config cfg; |
| pj_turn_sock_cfg setting; |
| |
| pj_timer_entry timer; |
| |
| int af; |
| pj_turn_tp_type conn_type; |
| pj_activesock_t *active_sock; |
| pj_ioqueue_op_key_t send_key; |
| }; |
| |
| |
| /* |
| * Callback prototypes. |
| */ |
| static pj_status_t turn_on_send_pkt(pj_turn_session *sess, |
| const pj_uint8_t *pkt, |
| unsigned pkt_len, |
| const pj_sockaddr_t *dst_addr, |
| unsigned dst_addr_len); |
| static void turn_on_channel_bound(pj_turn_session *sess, |
| const pj_sockaddr_t *peer_addr, |
| unsigned addr_len, |
| unsigned ch_num); |
| static void turn_on_rx_data(pj_turn_session *sess, |
| void *pkt, |
| unsigned pkt_len, |
| const pj_sockaddr_t *peer_addr, |
| unsigned addr_len); |
| static void turn_on_state(pj_turn_session *sess, |
| pj_turn_state_t old_state, |
| pj_turn_state_t new_state); |
| |
| static pj_bool_t on_data_read(pj_activesock_t *asock, |
| void *data, |
| pj_size_t size, |
| pj_status_t status, |
| pj_size_t *remainder); |
| static pj_bool_t on_connect_complete(pj_activesock_t *asock, |
| pj_status_t status); |
| |
| |
| |
| static void turn_sock_on_destroy(void *comp); |
| static void destroy(pj_turn_sock *turn_sock); |
| static void timer_cb(pj_timer_heap_t *th, pj_timer_entry *e); |
| |
| |
| /* Init config */ |
| PJ_DEF(void) pj_turn_sock_cfg_default(pj_turn_sock_cfg *cfg) |
| { |
| pj_bzero(cfg, sizeof(*cfg)); |
| cfg->max_pkt_size = PJ_TURN_MAX_PKT_LEN; |
| cfg->qos_type = PJ_QOS_TYPE_BEST_EFFORT; |
| cfg->qos_ignore_error = PJ_TRUE; |
| } |
| |
| |
| /* |
| * Create. |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_create(pj_stun_config *cfg, |
| int af, |
| pj_turn_tp_type conn_type, |
| const pj_turn_sock_cb *cb, |
| const pj_turn_sock_cfg *setting, |
| void *user_data, |
| pj_turn_sock **p_turn_sock) |
| { |
| pj_turn_sock *turn_sock; |
| pj_turn_session_cb sess_cb; |
| pj_turn_sock_cfg default_setting; |
| pj_pool_t *pool; |
| const char *name_tmpl; |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(cfg && p_turn_sock, PJ_EINVAL); |
| PJ_ASSERT_RETURN(af==pj_AF_INET() || af==pj_AF_INET6(), PJ_EINVAL); |
| PJ_ASSERT_RETURN(conn_type!=PJ_TURN_TP_TCP || PJ_HAS_TCP, PJ_EINVAL); |
| |
| if (!setting) { |
| pj_turn_sock_cfg_default(&default_setting); |
| setting = &default_setting; |
| } |
| |
| switch (conn_type) { |
| case PJ_TURN_TP_UDP: |
| name_tmpl = "udprel%p"; |
| break; |
| case PJ_TURN_TP_TCP: |
| name_tmpl = "tcprel%p"; |
| break; |
| default: |
| PJ_ASSERT_RETURN(!"Invalid TURN conn_type", PJ_EINVAL); |
| name_tmpl = "tcprel%p"; |
| break; |
| } |
| |
| /* Create and init basic data structure */ |
| pool = pj_pool_create(cfg->pf, name_tmpl, PJNATH_POOL_LEN_TURN_SOCK, |
| PJNATH_POOL_INC_TURN_SOCK, NULL); |
| turn_sock = PJ_POOL_ZALLOC_T(pool, pj_turn_sock); |
| turn_sock->pool = pool; |
| turn_sock->obj_name = pool->obj_name; |
| turn_sock->user_data = user_data; |
| turn_sock->af = af; |
| turn_sock->conn_type = conn_type; |
| |
| /* Copy STUN config (this contains ioqueue, timer heap, etc.) */ |
| pj_memcpy(&turn_sock->cfg, cfg, sizeof(*cfg)); |
| |
| /* Copy setting (QoS parameters etc */ |
| pj_memcpy(&turn_sock->setting, setting, sizeof(*setting)); |
| |
| /* Set callback */ |
| if (cb) { |
| pj_memcpy(&turn_sock->cb, cb, sizeof(*cb)); |
| } |
| |
| /* Session lock */ |
| if (setting && setting->grp_lock) { |
| turn_sock->grp_lock = setting->grp_lock; |
| } else { |
| status = pj_grp_lock_create(pool, NULL, &turn_sock->grp_lock); |
| if (status != PJ_SUCCESS) { |
| pj_pool_release(pool); |
| return status; |
| } |
| } |
| |
| pj_grp_lock_add_ref(turn_sock->grp_lock); |
| pj_grp_lock_add_handler(turn_sock->grp_lock, pool, turn_sock, |
| &turn_sock_on_destroy); |
| |
| /* Init timer */ |
| pj_timer_entry_init(&turn_sock->timer, TIMER_NONE, turn_sock, &timer_cb); |
| |
| /* Init TURN session */ |
| pj_bzero(&sess_cb, sizeof(sess_cb)); |
| sess_cb.on_send_pkt = &turn_on_send_pkt; |
| sess_cb.on_channel_bound = &turn_on_channel_bound; |
| sess_cb.on_rx_data = &turn_on_rx_data; |
| sess_cb.on_state = &turn_on_state; |
| status = pj_turn_session_create(cfg, pool->obj_name, af, conn_type, |
| turn_sock->grp_lock, &sess_cb, 0, |
| turn_sock, &turn_sock->sess); |
| if (status != PJ_SUCCESS) { |
| destroy(turn_sock); |
| return status; |
| } |
| |
| /* Note: socket and ioqueue will be created later once the TURN server |
| * has been resolved. |
| */ |
| |
| *p_turn_sock = turn_sock; |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Destroy. |
| */ |
| static void turn_sock_on_destroy(void *comp) |
| { |
| pj_turn_sock *turn_sock = (pj_turn_sock*) comp; |
| |
| if (turn_sock->pool) { |
| pj_pool_t *pool = turn_sock->pool; |
| PJ_LOG(4,(turn_sock->obj_name, "TURN socket destroyed")); |
| turn_sock->pool = NULL; |
| pj_pool_release(pool); |
| } |
| } |
| |
| static void destroy(pj_turn_sock *turn_sock) |
| { |
| PJ_LOG(4,(turn_sock->obj_name, "TURN socket destroy request, ref_cnt=%d", |
| pj_grp_lock_get_ref(turn_sock->grp_lock))); |
| |
| pj_grp_lock_acquire(turn_sock->grp_lock); |
| if (turn_sock->is_destroying) { |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return; |
| } |
| |
| turn_sock->is_destroying = PJ_TRUE; |
| if (turn_sock->sess) |
| pj_turn_session_shutdown(turn_sock->sess); |
| if (turn_sock->active_sock) |
| pj_activesock_close(turn_sock->active_sock); |
| pj_grp_lock_dec_ref(turn_sock->grp_lock); |
| pj_grp_lock_release(turn_sock->grp_lock); |
| } |
| |
| PJ_DEF(void) pj_turn_sock_destroy(pj_turn_sock *turn_sock) |
| { |
| pj_grp_lock_acquire(turn_sock->grp_lock); |
| if (turn_sock->is_destroying) { |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return; |
| } |
| |
| if (turn_sock->sess) { |
| pj_turn_session_shutdown(turn_sock->sess); |
| /* This will ultimately call our state callback, and when |
| * session state is DESTROYING we will schedule a timer to |
| * destroy ourselves. |
| */ |
| } else { |
| destroy(turn_sock); |
| } |
| |
| pj_grp_lock_release(turn_sock->grp_lock); |
| } |
| |
| |
| /* Timer callback */ |
| static void timer_cb(pj_timer_heap_t *th, pj_timer_entry *e) |
| { |
| pj_turn_sock *turn_sock = (pj_turn_sock*)e->user_data; |
| int eid = e->id; |
| |
| PJ_UNUSED_ARG(th); |
| |
| e->id = TIMER_NONE; |
| |
| switch (eid) { |
| case TIMER_DESTROY: |
| destroy(turn_sock); |
| break; |
| default: |
| pj_assert(!"Invalid timer id"); |
| break; |
| } |
| } |
| |
| |
| /* Display error */ |
| static void show_err(pj_turn_sock *turn_sock, const char *title, |
| pj_status_t status) |
| { |
| PJ_PERROR(4,(turn_sock->obj_name, status, title)); |
| } |
| |
| /* On error, terminate session */ |
| static void sess_fail(pj_turn_sock *turn_sock, const char *title, |
| pj_status_t status) |
| { |
| show_err(turn_sock, title, status); |
| if (turn_sock->sess) { |
| pj_turn_session_destroy(turn_sock->sess, status); |
| } |
| } |
| |
| /* |
| * Set user data. |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_set_user_data( pj_turn_sock *turn_sock, |
| void *user_data) |
| { |
| PJ_ASSERT_RETURN(turn_sock, PJ_EINVAL); |
| turn_sock->user_data = user_data; |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Get user data. |
| */ |
| PJ_DEF(void*) pj_turn_sock_get_user_data(pj_turn_sock *turn_sock) |
| { |
| PJ_ASSERT_RETURN(turn_sock, NULL); |
| return turn_sock->user_data; |
| } |
| |
| /** |
| * Get info. |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_get_info(pj_turn_sock *turn_sock, |
| pj_turn_session_info *info) |
| { |
| PJ_ASSERT_RETURN(turn_sock && info, PJ_EINVAL); |
| |
| if (turn_sock->sess) { |
| return pj_turn_session_get_info(turn_sock->sess, info); |
| } else { |
| pj_bzero(info, sizeof(*info)); |
| info->state = PJ_TURN_STATE_NULL; |
| return PJ_SUCCESS; |
| } |
| } |
| |
| /** |
| * Lock the TURN socket. Application may need to call this function to |
| * synchronize access to other objects to avoid deadlock. |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_lock(pj_turn_sock *turn_sock) |
| { |
| return pj_grp_lock_acquire(turn_sock->grp_lock); |
| } |
| |
| /** |
| * Unlock the TURN socket. |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_unlock(pj_turn_sock *turn_sock) |
| { |
| return pj_grp_lock_release(turn_sock->grp_lock); |
| } |
| |
| /* |
| * Set STUN message logging for this TURN session. |
| */ |
| PJ_DEF(void) pj_turn_sock_set_log( pj_turn_sock *turn_sock, |
| unsigned flags) |
| { |
| pj_turn_session_set_log(turn_sock->sess, flags); |
| } |
| |
| /* |
| * Set software name |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_set_software_name( pj_turn_sock *turn_sock, |
| const pj_str_t *sw) |
| { |
| return pj_turn_session_set_software_name(turn_sock->sess, sw); |
| } |
| |
| /* |
| * Initialize. |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_alloc(pj_turn_sock *turn_sock, |
| const pj_str_t *domain, |
| int default_port, |
| pj_dns_resolver *resolver, |
| const pj_stun_auth_cred *cred, |
| const pj_turn_alloc_param *param) |
| { |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(turn_sock && domain, PJ_EINVAL); |
| PJ_ASSERT_RETURN(turn_sock->sess, PJ_EINVALIDOP); |
| |
| pj_grp_lock_acquire(turn_sock->grp_lock); |
| |
| /* Copy alloc param. We will call session_alloc() only after the |
| * server address has been resolved. |
| */ |
| if (param) { |
| pj_turn_alloc_param_copy(turn_sock->pool, &turn_sock->alloc_param, param); |
| } else { |
| pj_turn_alloc_param_default(&turn_sock->alloc_param); |
| } |
| |
| /* Set credental */ |
| if (cred) { |
| status = pj_turn_session_set_credential(turn_sock->sess, cred); |
| if (status != PJ_SUCCESS) { |
| sess_fail(turn_sock, "Error setting credential", status); |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return status; |
| } |
| } |
| |
| /* Resolve server */ |
| status = pj_turn_session_set_server(turn_sock->sess, domain, default_port, |
| resolver); |
| if (status != PJ_SUCCESS) { |
| sess_fail(turn_sock, "Error setting TURN server", status); |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return status; |
| } |
| |
| /* Done for now. The next work will be done when session state moved |
| * to RESOLVED state. |
| */ |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Install permission |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_set_perm( pj_turn_sock *turn_sock, |
| unsigned addr_cnt, |
| const pj_sockaddr addr[], |
| unsigned options) |
| { |
| if (turn_sock->sess == NULL) |
| return PJ_EINVALIDOP; |
| |
| return pj_turn_session_set_perm(turn_sock->sess, addr_cnt, addr, options); |
| } |
| |
| /* |
| * Send packet. |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_sendto( pj_turn_sock *turn_sock, |
| const pj_uint8_t *pkt, |
| unsigned pkt_len, |
| const pj_sockaddr_t *addr, |
| unsigned addr_len) |
| { |
| PJ_ASSERT_RETURN(turn_sock && addr && addr_len, PJ_EINVAL); |
| |
| if (turn_sock->sess == NULL) |
| return PJ_EINVALIDOP; |
| |
| return pj_turn_session_sendto(turn_sock->sess, pkt, pkt_len, |
| addr, addr_len); |
| } |
| |
| /* |
| * Bind a peer address to a channel number. |
| */ |
| PJ_DEF(pj_status_t) pj_turn_sock_bind_channel( pj_turn_sock *turn_sock, |
| const pj_sockaddr_t *peer, |
| unsigned addr_len) |
| { |
| PJ_ASSERT_RETURN(turn_sock && peer && addr_len, PJ_EINVAL); |
| PJ_ASSERT_RETURN(turn_sock->sess != NULL, PJ_EINVALIDOP); |
| |
| return pj_turn_session_bind_channel(turn_sock->sess, peer, addr_len); |
| } |
| |
| |
| /* |
| * Notification when outgoing TCP socket has been connected. |
| */ |
| static pj_bool_t on_connect_complete(pj_activesock_t *asock, |
| pj_status_t status) |
| { |
| pj_turn_sock *turn_sock; |
| |
| turn_sock = (pj_turn_sock*) pj_activesock_get_user_data(asock); |
| if (!turn_sock) |
| return PJ_FALSE; |
| |
| pj_grp_lock_acquire(turn_sock->grp_lock); |
| |
| /* TURN session may have already been destroyed here. |
| * See ticket #1557 (http://trac.pjsip.org/repos/ticket/1557). |
| */ |
| if (!turn_sock->sess) { |
| sess_fail(turn_sock, "TURN session already destroyed", status); |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return PJ_FALSE; |
| } |
| |
| if (status != PJ_SUCCESS) { |
| sess_fail(turn_sock, "TCP connect() error", status); |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return PJ_FALSE; |
| } |
| |
| if (turn_sock->conn_type != PJ_TURN_TP_UDP) { |
| PJ_LOG(5,(turn_sock->obj_name, "TCP connected")); |
| } |
| |
| /* Kick start pending read operation */ |
| status = pj_activesock_start_read(asock, turn_sock->pool, |
| turn_sock->setting.max_pkt_size, 0); |
| |
| /* Init send_key */ |
| pj_ioqueue_op_key_init(&turn_sock->send_key, sizeof(turn_sock->send_key)); |
| |
| /* Send Allocate request */ |
| status = pj_turn_session_alloc(turn_sock->sess, &turn_sock->alloc_param); |
| if (status != PJ_SUCCESS) { |
| sess_fail(turn_sock, "Error sending ALLOCATE", status); |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return PJ_FALSE; |
| } |
| |
| pj_grp_lock_release(turn_sock->grp_lock); |
| return PJ_TRUE; |
| } |
| |
| static pj_uint16_t GETVAL16H(const pj_uint8_t *buf, unsigned pos) |
| { |
| return (pj_uint16_t) ((buf[pos + 0] << 8) | \ |
| (buf[pos + 1] << 0)); |
| } |
| |
| /* Quick check to determine if there is enough packet to process in the |
| * incoming buffer. Return the packet length, or zero if there's no packet. |
| */ |
| static unsigned has_packet(pj_turn_sock *turn_sock, const void *buf, pj_size_t bufsize) |
| { |
| pj_bool_t is_stun; |
| |
| if (turn_sock->conn_type == PJ_TURN_TP_UDP) |
| return (unsigned)bufsize; |
| |
| /* Quickly check if this is STUN message, by checking the first two bits and |
| * size field which must be multiple of 4 bytes |
| */ |
| is_stun = ((((pj_uint8_t*)buf)[0] & 0xC0) == 0) && |
| ((GETVAL16H((const pj_uint8_t*)buf, 2) & 0x03)==0); |
| |
| if (is_stun) { |
| pj_size_t msg_len = GETVAL16H((const pj_uint8_t*)buf, 2); |
| return (unsigned)((msg_len+20 <= bufsize) ? msg_len+20 : 0); |
| } else { |
| /* This must be ChannelData. */ |
| pj_turn_channel_data cd; |
| |
| if (bufsize < 4) |
| return 0; |
| |
| /* Decode ChannelData packet */ |
| pj_memcpy(&cd, buf, sizeof(pj_turn_channel_data)); |
| cd.length = pj_ntohs(cd.length); |
| |
| if (bufsize >= cd.length+sizeof(cd)) |
| return (cd.length+sizeof(cd)+3) & (~3); |
| else |
| return 0; |
| } |
| } |
| |
| /* |
| * Notification from ioqueue when incoming UDP packet is received. |
| */ |
| static pj_bool_t on_data_read(pj_activesock_t *asock, |
| void *data, |
| pj_size_t size, |
| pj_status_t status, |
| pj_size_t *remainder) |
| { |
| pj_turn_sock *turn_sock; |
| pj_bool_t ret = PJ_TRUE; |
| |
| turn_sock = (pj_turn_sock*) pj_activesock_get_user_data(asock); |
| pj_grp_lock_acquire(turn_sock->grp_lock); |
| |
| if (status == PJ_SUCCESS && turn_sock->sess && !turn_sock->is_destroying) { |
| /* Report incoming packet to TURN session, repeat while we have |
| * "packet" in the buffer (required for stream-oriented transports) |
| */ |
| unsigned pkt_len; |
| |
| //PJ_LOG(5,(turn_sock->pool->obj_name, |
| // "Incoming data, %lu bytes total buffer", size)); |
| |
| while ((pkt_len=has_packet(turn_sock, data, size)) != 0) { |
| pj_size_t parsed_len; |
| //const pj_uint8_t *pkt = (const pj_uint8_t*)data; |
| |
| //PJ_LOG(5,(turn_sock->pool->obj_name, |
| // "Packet start: %02X %02X %02X %02X", |
| // pkt[0], pkt[1], pkt[2], pkt[3])); |
| |
| //PJ_LOG(5,(turn_sock->pool->obj_name, |
| // "Processing %lu bytes packet of %lu bytes total buffer", |
| // pkt_len, size)); |
| |
| parsed_len = (unsigned)size; |
| pj_turn_session_on_rx_pkt(turn_sock->sess, data, size, &parsed_len); |
| |
| /* parsed_len may be zero if we have parsing error, so use our |
| * previous calculation to exhaust the bad packet. |
| */ |
| if (parsed_len == 0) |
| parsed_len = pkt_len; |
| |
| if (parsed_len < (unsigned)size) { |
| *remainder = size - parsed_len; |
| pj_memmove(data, ((char*)data)+parsed_len, *remainder); |
| } else { |
| *remainder = 0; |
| } |
| size = *remainder; |
| |
| //PJ_LOG(5,(turn_sock->pool->obj_name, |
| // "Buffer size now %lu bytes", size)); |
| } |
| } else if (status != PJ_SUCCESS && |
| turn_sock->conn_type != PJ_TURN_TP_UDP) |
| { |
| sess_fail(turn_sock, "TCP connection closed", status); |
| ret = PJ_FALSE; |
| goto on_return; |
| } |
| |
| on_return: |
| pj_grp_lock_release(turn_sock->grp_lock); |
| |
| return ret; |
| } |
| |
| |
| /* |
| * Callback from TURN session to send outgoing packet. |
| */ |
| static pj_status_t turn_on_send_pkt(pj_turn_session *sess, |
| const pj_uint8_t *pkt, |
| unsigned pkt_len, |
| const pj_sockaddr_t *dst_addr, |
| unsigned dst_addr_len) |
| { |
| pj_turn_sock *turn_sock = (pj_turn_sock*) |
| pj_turn_session_get_user_data(sess); |
| pj_ssize_t len = pkt_len; |
| pj_status_t status; |
| |
| if (turn_sock == NULL || turn_sock->is_destroying) { |
| /* We've been destroyed */ |
| // https://trac.pjsip.org/repos/ticket/1316 |
| //pj_assert(!"We should shutdown gracefully"); |
| return PJ_EINVALIDOP; |
| } |
| |
| PJ_UNUSED_ARG(dst_addr); |
| PJ_UNUSED_ARG(dst_addr_len); |
| |
| status = pj_activesock_send(turn_sock->active_sock, &turn_sock->send_key, |
| pkt, &len, 0); |
| if (status != PJ_SUCCESS && status != PJ_EPENDING) { |
| show_err(turn_sock, "socket send()", status); |
| } |
| |
| return status; |
| } |
| |
| |
| /* |
| * Callback from TURN session when a channel is successfully bound. |
| */ |
| static void turn_on_channel_bound(pj_turn_session *sess, |
| const pj_sockaddr_t *peer_addr, |
| unsigned addr_len, |
| unsigned ch_num) |
| { |
| PJ_UNUSED_ARG(sess); |
| PJ_UNUSED_ARG(peer_addr); |
| PJ_UNUSED_ARG(addr_len); |
| PJ_UNUSED_ARG(ch_num); |
| } |
| |
| |
| /* |
| * Callback from TURN session upon incoming data. |
| */ |
| static void turn_on_rx_data(pj_turn_session *sess, |
| void *pkt, |
| unsigned pkt_len, |
| const pj_sockaddr_t *peer_addr, |
| unsigned addr_len) |
| { |
| pj_turn_sock *turn_sock = (pj_turn_sock*) |
| pj_turn_session_get_user_data(sess); |
| if (turn_sock == NULL || turn_sock->is_destroying) { |
| /* We've been destroyed */ |
| return; |
| } |
| |
| if (turn_sock->cb.on_rx_data) { |
| (*turn_sock->cb.on_rx_data)(turn_sock, pkt, pkt_len, |
| peer_addr, addr_len); |
| } |
| } |
| |
| |
| /* |
| * Callback from TURN session when state has changed |
| */ |
| static void turn_on_state(pj_turn_session *sess, |
| pj_turn_state_t old_state, |
| pj_turn_state_t new_state) |
| { |
| pj_turn_sock *turn_sock = (pj_turn_sock*) |
| pj_turn_session_get_user_data(sess); |
| pj_status_t status; |
| |
| if (turn_sock == NULL) { |
| /* We've been destroyed */ |
| return; |
| } |
| |
| /* Notify app first */ |
| if (turn_sock->cb.on_state) { |
| (*turn_sock->cb.on_state)(turn_sock, old_state, new_state); |
| } |
| |
| /* Make sure user hasn't destroyed us in the callback */ |
| if (turn_sock->sess && new_state == PJ_TURN_STATE_RESOLVED) { |
| pj_turn_session_info info; |
| pj_turn_session_get_info(turn_sock->sess, &info); |
| new_state = info.state; |
| } |
| |
| if (turn_sock->sess && new_state == PJ_TURN_STATE_RESOLVED) { |
| /* |
| * Once server has been resolved, initiate outgoing TCP |
| * connection to the server. |
| */ |
| pj_turn_session_info info; |
| char addrtxt[PJ_INET6_ADDRSTRLEN+8]; |
| int sock_type; |
| pj_sock_t sock; |
| pj_activesock_cfg asock_cfg; |
| pj_activesock_cb asock_cb; |
| pj_sockaddr bound_addr, *cfg_bind_addr; |
| pj_uint16_t max_bind_retry; |
| |
| /* Close existing connection, if any. This happens when |
| * we're switching to alternate TURN server when either TCP |
| * connection or ALLOCATE request failed. |
| */ |
| if (turn_sock->active_sock) { |
| pj_activesock_close(turn_sock->active_sock); |
| turn_sock->active_sock = NULL; |
| } |
| |
| /* Get server address from session info */ |
| pj_turn_session_get_info(sess, &info); |
| |
| if (turn_sock->conn_type == PJ_TURN_TP_UDP) |
| sock_type = pj_SOCK_DGRAM(); |
| else |
| sock_type = pj_SOCK_STREAM(); |
| |
| /* Init socket */ |
| status = pj_sock_socket(turn_sock->af, sock_type, 0, &sock); |
| if (status != PJ_SUCCESS) { |
| pj_turn_sock_destroy(turn_sock); |
| return; |
| } |
| |
| /* Bind socket */ |
| cfg_bind_addr = &turn_sock->setting.bound_addr; |
| max_bind_retry = MAX_BIND_RETRY; |
| if (turn_sock->setting.port_range && |
| turn_sock->setting.port_range < max_bind_retry) |
| { |
| max_bind_retry = turn_sock->setting.port_range; |
| } |
| pj_sockaddr_init(turn_sock->af, &bound_addr, NULL, 0); |
| if (cfg_bind_addr->addr.sa_family == pj_AF_INET() || |
| cfg_bind_addr->addr.sa_family == pj_AF_INET6()) |
| { |
| pj_sockaddr_cp(&bound_addr, cfg_bind_addr); |
| } |
| status = pj_sock_bind_random(sock, &bound_addr, |
| turn_sock->setting.port_range, |
| max_bind_retry); |
| if (status != PJ_SUCCESS) { |
| pj_turn_sock_destroy(turn_sock); |
| return; |
| } |
| |
| /* Apply QoS, if specified */ |
| status = pj_sock_apply_qos2(sock, turn_sock->setting.qos_type, |
| &turn_sock->setting.qos_params, |
| (turn_sock->setting.qos_ignore_error?2:1), |
| turn_sock->pool->obj_name, NULL); |
| if (status != PJ_SUCCESS && !turn_sock->setting.qos_ignore_error) { |
| pj_turn_sock_destroy(turn_sock); |
| return; |
| } |
| |
| /* Apply socket buffer size */ |
| if (turn_sock->setting.so_rcvbuf_size > 0) { |
| unsigned sobuf_size = turn_sock->setting.so_rcvbuf_size; |
| status = pj_sock_setsockopt_sobuf(sock, pj_SO_RCVBUF(), |
| PJ_TRUE, &sobuf_size); |
| if (status != PJ_SUCCESS) { |
| pj_perror(3, turn_sock->obj_name, status, |
| "Failed setting SO_RCVBUF"); |
| } else { |
| if (sobuf_size < turn_sock->setting.so_rcvbuf_size) { |
| PJ_LOG(4, (turn_sock->obj_name, |
| "Warning! Cannot set SO_RCVBUF as configured," |
| " now=%d, configured=%d", sobuf_size, |
| turn_sock->setting.so_rcvbuf_size)); |
| } else { |
| PJ_LOG(5, (turn_sock->obj_name, "SO_RCVBUF set to %d", |
| sobuf_size)); |
| } |
| } |
| } |
| if (turn_sock->setting.so_sndbuf_size > 0) { |
| unsigned sobuf_size = turn_sock->setting.so_sndbuf_size; |
| status = pj_sock_setsockopt_sobuf(sock, pj_SO_SNDBUF(), |
| PJ_TRUE, &sobuf_size); |
| if (status != PJ_SUCCESS) { |
| pj_perror(3, turn_sock->obj_name, status, |
| "Failed setting SO_SNDBUF"); |
| } else { |
| if (sobuf_size < turn_sock->setting.so_sndbuf_size) { |
| PJ_LOG(4, (turn_sock->obj_name, |
| "Warning! Cannot set SO_SNDBUF as configured," |
| " now=%d, configured=%d", sobuf_size, |
| turn_sock->setting.so_sndbuf_size)); |
| } else { |
| PJ_LOG(5, (turn_sock->obj_name, "SO_SNDBUF set to %d", |
| sobuf_size)); |
| } |
| } |
| } |
| |
| /* Create active socket */ |
| pj_activesock_cfg_default(&asock_cfg); |
| asock_cfg.grp_lock = turn_sock->grp_lock; |
| |
| pj_bzero(&asock_cb, sizeof(asock_cb)); |
| asock_cb.on_data_read = &on_data_read; |
| asock_cb.on_connect_complete = &on_connect_complete; |
| status = pj_activesock_create(turn_sock->pool, sock, |
| sock_type, &asock_cfg, |
| turn_sock->cfg.ioqueue, &asock_cb, |
| turn_sock, |
| &turn_sock->active_sock); |
| if (status != PJ_SUCCESS) { |
| pj_turn_sock_destroy(turn_sock); |
| return; |
| } |
| |
| PJ_LOG(5,(turn_sock->pool->obj_name, |
| "Connecting to %s", |
| pj_sockaddr_print(&info.server, addrtxt, |
| sizeof(addrtxt), 3))); |
| |
| /* Initiate non-blocking connect */ |
| #if PJ_HAS_TCP |
| status=pj_activesock_start_connect(turn_sock->active_sock, |
| turn_sock->pool, |
| &info.server, |
| pj_sockaddr_get_len(&info.server)); |
| if (status == PJ_SUCCESS) { |
| on_connect_complete(turn_sock->active_sock, PJ_SUCCESS); |
| } else if (status != PJ_EPENDING) { |
| pj_turn_sock_destroy(turn_sock); |
| return; |
| } |
| #else |
| on_connect_complete(turn_sock->active_sock, PJ_SUCCESS); |
| #endif |
| |
| /* Done for now. Subsequent work will be done in |
| * on_connect_complete() callback. |
| */ |
| } |
| |
| if (new_state >= PJ_TURN_STATE_DESTROYING && turn_sock->sess) { |
| pj_time_val delay = {0, 0}; |
| |
| turn_sock->sess = NULL; |
| pj_turn_session_set_user_data(sess, NULL); |
| |
| pj_timer_heap_cancel_if_active(turn_sock->cfg.timer_heap, |
| &turn_sock->timer, 0); |
| pj_timer_heap_schedule_w_grp_lock(turn_sock->cfg.timer_heap, |
| &turn_sock->timer, |
| &delay, TIMER_DESTROY, |
| turn_sock->grp_lock); |
| } |
| } |
| |
| |