Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include "turn.h" |
| 21 | #include <pj/compat/socket.h> |
| 22 | |
| 23 | struct read_op |
| 24 | { |
| 25 | pj_ioqueue_op_key_t op_key; |
| 26 | pj_turn_pkt pkt; |
| 27 | }; |
| 28 | |
| 29 | struct udp_listener |
| 30 | { |
| 31 | pj_turn_listener base; |
| 32 | |
| 33 | pj_ioqueue_key_t *key; |
| 34 | unsigned read_cnt; |
| 35 | struct read_op **read_op; /* Array of read_op's */ |
| 36 | |
| 37 | pj_turn_transport tp; /* Transport instance */ |
| 38 | }; |
| 39 | |
| 40 | |
| 41 | static pj_status_t udp_destroy(pj_turn_listener *udp); |
| 42 | static void on_read_complete(pj_ioqueue_key_t *key, |
| 43 | pj_ioqueue_op_key_t *op_key, |
| 44 | pj_ssize_t bytes_read); |
| 45 | |
| 46 | static pj_status_t udp_sendto(pj_turn_transport *tp, |
| 47 | const void *packet, |
| 48 | pj_size_t size, |
| 49 | unsigned flag, |
| 50 | const pj_sockaddr_t *addr, |
| 51 | int addr_len); |
| 52 | static void udp_add_ref(pj_turn_transport *tp, |
| 53 | pj_turn_allocation *alloc); |
| 54 | static void udp_dec_ref(pj_turn_transport *tp, |
| 55 | pj_turn_allocation *alloc); |
| 56 | |
| 57 | |
| 58 | /* |
| 59 | * Create a new listener on the specified port. |
| 60 | */ |
| 61 | PJ_DEF(pj_status_t) pj_turn_listener_create_udp( pj_turn_srv *srv, |
| 62 | int af, |
| 63 | const pj_str_t *bound_addr, |
| 64 | unsigned port, |
| 65 | unsigned concurrency_cnt, |
| 66 | unsigned flags, |
| 67 | pj_turn_listener **p_listener) |
| 68 | { |
| 69 | pj_pool_t *pool; |
| 70 | struct udp_listener *udp; |
| 71 | pj_ioqueue_callback ioqueue_cb; |
| 72 | unsigned i; |
| 73 | pj_status_t status; |
| 74 | |
| 75 | /* Create structure */ |
| 76 | pool = pj_pool_create(srv->core.pf, "udp%p", 1000, 1000, NULL); |
| 77 | udp = PJ_POOL_ZALLOC_T(pool, struct udp_listener); |
| 78 | udp->base.pool = pool; |
| 79 | udp->base.obj_name = pool->obj_name; |
| 80 | udp->base.server = srv; |
| 81 | udp->base.tp_type = PJ_TURN_TP_UDP; |
| 82 | udp->base.sock = PJ_INVALID_SOCKET; |
| 83 | udp->base.destroy = &udp_destroy; |
| 84 | udp->read_cnt = concurrency_cnt; |
| 85 | udp->base.flags = flags; |
| 86 | |
| 87 | udp->tp.obj_name = udp->base.obj_name; |
| 88 | udp->tp.info = udp->base.info; |
| 89 | udp->tp.listener = &udp->base; |
| 90 | udp->tp.sendto = &udp_sendto; |
| 91 | udp->tp.add_ref = &udp_add_ref; |
| 92 | udp->tp.dec_ref = &udp_dec_ref; |
| 93 | |
| 94 | /* Create socket */ |
| 95 | status = pj_sock_socket(af, pj_SOCK_DGRAM(), 0, &udp->base.sock); |
| 96 | if (status != PJ_SUCCESS) |
| 97 | goto on_error; |
| 98 | |
| 99 | /* Init bind address */ |
| 100 | status = pj_sockaddr_init(af, &udp->base.addr, bound_addr, |
| 101 | (pj_uint16_t)port); |
| 102 | if (status != PJ_SUCCESS) |
| 103 | goto on_error; |
| 104 | |
| 105 | /* Create info */ |
| 106 | pj_ansi_strcpy(udp->base.info, "UDP:"); |
| 107 | pj_sockaddr_print(&udp->base.addr, udp->base.info+4, |
| 108 | sizeof(udp->base.info)-4, 3); |
| 109 | |
| 110 | /* Bind socket */ |
| 111 | status = pj_sock_bind(udp->base.sock, &udp->base.addr, |
| 112 | pj_sockaddr_get_len(&udp->base.addr)); |
| 113 | if (status != PJ_SUCCESS) |
| 114 | goto on_error; |
| 115 | |
| 116 | /* Register to ioqueue */ |
| 117 | pj_bzero(&ioqueue_cb, sizeof(ioqueue_cb)); |
| 118 | ioqueue_cb.on_read_complete = on_read_complete; |
| 119 | status = pj_ioqueue_register_sock(pool, srv->core.ioqueue, udp->base.sock, |
| 120 | udp, &ioqueue_cb, &udp->key); |
| 121 | |
| 122 | /* Create op keys */ |
| 123 | udp->read_op = (struct read_op**)pj_pool_calloc(pool, concurrency_cnt, |
| 124 | sizeof(struct read_op*)); |
| 125 | |
| 126 | /* Create each read_op and kick off read operation */ |
| 127 | for (i=0; i<concurrency_cnt; ++i) { |
| 128 | pj_pool_t *rpool = pj_pool_create(srv->core.pf, "rop%p", |
| 129 | 1000, 1000, NULL); |
| 130 | |
| 131 | udp->read_op[i] = PJ_POOL_ZALLOC_T(pool, struct read_op); |
| 132 | udp->read_op[i]->pkt.pool = rpool; |
| 133 | |
| 134 | on_read_complete(udp->key, &udp->read_op[i]->op_key, 0); |
| 135 | } |
| 136 | |
| 137 | /* Done */ |
| 138 | PJ_LOG(4,(udp->base.obj_name, "Listener %s created", udp->base.info)); |
| 139 | |
| 140 | *p_listener = &udp->base; |
| 141 | return PJ_SUCCESS; |
| 142 | |
| 143 | |
| 144 | on_error: |
| 145 | udp_destroy(&udp->base); |
| 146 | return status; |
| 147 | } |
| 148 | |
| 149 | |
| 150 | /* |
| 151 | * Destroy listener. |
| 152 | */ |
| 153 | static pj_status_t udp_destroy(pj_turn_listener *listener) |
| 154 | { |
| 155 | struct udp_listener *udp = (struct udp_listener *)listener; |
| 156 | unsigned i; |
| 157 | |
| 158 | if (udp->key) { |
| 159 | pj_ioqueue_unregister(udp->key); |
| 160 | udp->key = NULL; |
| 161 | udp->base.sock = PJ_INVALID_SOCKET; |
| 162 | } else if (udp->base.sock != PJ_INVALID_SOCKET) { |
| 163 | pj_sock_close(udp->base.sock); |
| 164 | udp->base.sock = PJ_INVALID_SOCKET; |
| 165 | } |
| 166 | |
| 167 | for (i=0; i<udp->read_cnt; ++i) { |
| 168 | if (udp->read_op[i]->pkt.pool) { |
| 169 | pj_pool_t *rpool = udp->read_op[i]->pkt.pool; |
| 170 | udp->read_op[i]->pkt.pool = NULL; |
| 171 | pj_pool_release(rpool); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | if (udp->base.pool) { |
| 176 | pj_pool_t *pool = udp->base.pool; |
| 177 | |
| 178 | PJ_LOG(4,(udp->base.obj_name, "Listener %s destroyed", |
| 179 | udp->base.info)); |
| 180 | |
| 181 | udp->base.pool = NULL; |
| 182 | pj_pool_release(pool); |
| 183 | } |
| 184 | return PJ_SUCCESS; |
| 185 | } |
| 186 | |
| 187 | /* |
| 188 | * Callback to send packet. |
| 189 | */ |
| 190 | static pj_status_t udp_sendto(pj_turn_transport *tp, |
| 191 | const void *packet, |
| 192 | pj_size_t size, |
| 193 | unsigned flag, |
| 194 | const pj_sockaddr_t *addr, |
| 195 | int addr_len) |
| 196 | { |
| 197 | pj_ssize_t len = size; |
| 198 | return pj_sock_sendto(tp->listener->sock, packet, &len, flag, addr, addr_len); |
| 199 | } |
| 200 | |
| 201 | |
| 202 | static void udp_add_ref(pj_turn_transport *tp, |
| 203 | pj_turn_allocation *alloc) |
| 204 | { |
| 205 | /* Do nothing */ |
| 206 | PJ_UNUSED_ARG(tp); |
| 207 | PJ_UNUSED_ARG(alloc); |
| 208 | } |
| 209 | |
| 210 | static void udp_dec_ref(pj_turn_transport *tp, |
| 211 | pj_turn_allocation *alloc) |
| 212 | { |
| 213 | /* Do nothing */ |
| 214 | PJ_UNUSED_ARG(tp); |
| 215 | PJ_UNUSED_ARG(alloc); |
| 216 | } |
| 217 | |
| 218 | |
| 219 | /* |
| 220 | * Callback on received packet. |
| 221 | */ |
| 222 | static void on_read_complete(pj_ioqueue_key_t *key, |
| 223 | pj_ioqueue_op_key_t *op_key, |
| 224 | pj_ssize_t bytes_read) |
| 225 | { |
| 226 | struct udp_listener *udp; |
| 227 | struct read_op *read_op = (struct read_op*) op_key; |
| 228 | pj_status_t status; |
| 229 | |
| 230 | udp = (struct udp_listener*) pj_ioqueue_get_user_data(key); |
| 231 | |
| 232 | do { |
| 233 | pj_pool_t *rpool; |
| 234 | |
| 235 | /* Report to server */ |
| 236 | if (bytes_read > 0) { |
| 237 | read_op->pkt.len = bytes_read; |
| 238 | pj_gettimeofday(&read_op->pkt.rx_time); |
| 239 | |
| 240 | pj_turn_srv_on_rx_pkt(udp->base.server, &read_op->pkt); |
| 241 | } |
| 242 | |
| 243 | /* Reset pool */ |
| 244 | rpool = read_op->pkt.pool; |
| 245 | pj_pool_reset(rpool); |
| 246 | read_op->pkt.pool = rpool; |
| 247 | read_op->pkt.transport = &udp->tp; |
| 248 | read_op->pkt.src.tp_type = udp->base.tp_type; |
| 249 | |
| 250 | /* Read next packet */ |
| 251 | bytes_read = sizeof(read_op->pkt.pkt); |
| 252 | read_op->pkt.src_addr_len = sizeof(read_op->pkt.src.clt_addr); |
| 253 | pj_bzero(&read_op->pkt.src.clt_addr, sizeof(read_op->pkt.src.clt_addr)); |
| 254 | |
| 255 | status = pj_ioqueue_recvfrom(udp->key, op_key, |
| 256 | read_op->pkt.pkt, &bytes_read, 0, |
| 257 | &read_op->pkt.src.clt_addr, |
| 258 | &read_op->pkt.src_addr_len); |
| 259 | |
| 260 | if (status != PJ_EPENDING && status != PJ_SUCCESS) |
| 261 | bytes_read = -status; |
| 262 | |
| 263 | } while (status != PJ_EPENDING && status != PJ_ECANCELLED && |
| 264 | status != PJ_STATUS_FROM_OS(PJ_BLOCKING_ERROR_VAL)); |
| 265 | } |
| 266 | |