Benny Prijono | 7cd1622 | 2007-03-05 00:58:24 +0000 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2003-2005 Benny Prijono <benny@prijono.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #include "server.h" |
| 20 | |
| 21 | #define THIS_FILE "bind_usage.c" |
| 22 | |
| 23 | static void usage_on_rx_data(pj_stun_usage *usage, |
| 24 | void *pkt, |
| 25 | pj_size_t pkt_size, |
| 26 | const pj_sockaddr_t *src_addr, |
| 27 | unsigned src_addr_len); |
| 28 | static pj_status_t sess_on_send_msg(pj_stun_session *sess, |
| 29 | const void *pkt, |
| 30 | pj_size_t pkt_size, |
| 31 | const pj_sockaddr_t *dst_addr, |
| 32 | unsigned addr_len); |
| 33 | static pj_status_t sess_on_rx_request(pj_stun_session *sess, |
| 34 | const pj_uint8_t *pkt, |
| 35 | unsigned pkt_len, |
| 36 | const pj_stun_msg *msg, |
| 37 | const pj_sockaddr_t *src_addr, |
| 38 | unsigned src_addr_len); |
| 39 | |
| 40 | PJ_DEF(pj_status_t) pj_stun_bind_usage_create(pj_stun_server *srv, |
| 41 | const pj_str_t *ip_addr, |
| 42 | unsigned port, |
| 43 | pj_stun_usage **p_bu) |
| 44 | { |
| 45 | pj_stun_server_info *si; |
| 46 | pj_stun_session *session; |
| 47 | pj_stun_usage *usage; |
| 48 | pj_stun_usage_cb usage_cb; |
| 49 | pj_stun_session_cb sess_cb; |
| 50 | pj_sockaddr_in local_addr; |
| 51 | pj_status_t status; |
| 52 | |
| 53 | si = pj_stun_server_get_info(srv); |
| 54 | |
| 55 | status = pj_sockaddr_in_init(&local_addr, ip_addr, (pj_uint16_t)port); |
| 56 | if (status != PJ_SUCCESS) |
| 57 | return status; |
| 58 | |
| 59 | pj_bzero(&usage_cb, sizeof(usage_cb)); |
| 60 | usage_cb.on_rx_data = &usage_on_rx_data; |
| 61 | |
| 62 | status = pj_stun_usage_create(srv, "bind%p", &usage_cb, |
| 63 | PJ_AF_INET, PJ_SOCK_DGRAM, 0, |
| 64 | &local_addr, sizeof(local_addr), |
| 65 | &usage); |
| 66 | if (status != PJ_SUCCESS) |
| 67 | return status; |
| 68 | |
| 69 | pj_bzero(&sess_cb, sizeof(sess_cb)); |
| 70 | sess_cb.on_send_msg = &sess_on_send_msg; |
| 71 | sess_cb.on_rx_request = &sess_on_rx_request; |
| 72 | status = pj_stun_session_create(si->endpt, "bind%p", &sess_cb, PJ_FALSE, |
| 73 | &session); |
| 74 | if (status != PJ_SUCCESS) { |
| 75 | pj_stun_usage_destroy(usage); |
| 76 | return status; |
| 77 | } |
| 78 | |
| 79 | pj_stun_usage_set_user_data(usage, session); |
| 80 | pj_stun_session_set_user_data(session, usage); |
| 81 | |
| 82 | *p_bu = usage; |
| 83 | |
| 84 | return PJ_SUCCESS; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | static void usage_on_rx_data(pj_stun_usage *usage, |
| 89 | void *pkt, |
| 90 | pj_size_t pkt_size, |
| 91 | const pj_sockaddr_t *src_addr, |
| 92 | unsigned src_addr_len) |
| 93 | { |
| 94 | pj_stun_session *session; |
| 95 | pj_status_t status; |
| 96 | |
| 97 | session = (pj_stun_session*) pj_stun_usage_get_user_data(usage); |
| 98 | |
| 99 | /* Handle packet to session */ |
| 100 | status = pj_stun_session_on_rx_pkt(session, (pj_uint8_t*)pkt, pkt_size, |
| 101 | PJ_STUN_IS_DATAGRAM | PJ_STUN_CHECK_PACKET, |
| 102 | NULL, src_addr, src_addr_len); |
| 103 | if (status != PJ_SUCCESS) { |
| 104 | pj_stun_perror(THIS_FILE, "Error handling incoming packet", status); |
| 105 | return; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | |
| 110 | static pj_status_t sess_on_send_msg(pj_stun_session *sess, |
| 111 | const void *pkt, |
| 112 | pj_size_t pkt_size, |
| 113 | const pj_sockaddr_t *dst_addr, |
| 114 | unsigned addr_len) |
| 115 | { |
| 116 | pj_stun_usage *usage; |
| 117 | |
| 118 | usage = pj_stun_session_get_user_data(sess); |
| 119 | |
| 120 | return pj_stun_usage_sendto(usage, pkt, pkt_size, 0, |
| 121 | dst_addr, addr_len); |
| 122 | } |
| 123 | |
| 124 | |
| 125 | static pj_status_t sess_on_rx_request(pj_stun_session *sess, |
| 126 | const pj_uint8_t *pkt, |
| 127 | unsigned pkt_len, |
| 128 | const pj_stun_msg *msg, |
| 129 | const pj_sockaddr_t *src_addr, |
| 130 | unsigned src_addr_len) |
| 131 | { |
| 132 | pj_stun_tx_data *tdata; |
| 133 | pj_status_t status; |
| 134 | |
| 135 | PJ_UNUSED_ARG(pkt); |
| 136 | PJ_UNUSED_ARG(pkt_len); |
| 137 | |
| 138 | /* Create response */ |
| 139 | status = pj_stun_session_create_response(sess, msg, 0, NULL, &tdata); |
| 140 | if (status != PJ_SUCCESS) |
| 141 | return status; |
| 142 | |
| 143 | /* Create MAPPED-ADDRESS attribute */ |
| 144 | status = pj_stun_msg_add_ip_addr_attr(tdata->pool, tdata->msg, |
| 145 | PJ_STUN_ATTR_MAPPED_ADDR, |
| 146 | PJ_FALSE, |
| 147 | src_addr, src_addr_len); |
| 148 | if (status != PJ_SUCCESS) { |
| 149 | pj_stun_perror(THIS_FILE, "Error creating response", status); |
| 150 | pj_stun_msg_destroy_tdata(sess, tdata); |
| 151 | return status; |
| 152 | } |
| 153 | |
| 154 | /* On the presence of magic, create XOR-MAPPED-ADDRESS attribute */ |
| 155 | if (msg->hdr.magic == PJ_STUN_MAGIC) { |
| 156 | status = |
| 157 | pj_stun_msg_add_ip_addr_attr(tdata->pool, tdata->msg, |
| 158 | PJ_STUN_ATTR_XOR_MAPPED_ADDRESS, |
| 159 | PJ_TRUE, |
| 160 | src_addr, src_addr_len); |
| 161 | if (status != PJ_SUCCESS) { |
| 162 | pj_stun_perror(THIS_FILE, "Error creating response", status); |
| 163 | pj_stun_msg_destroy_tdata(sess, tdata); |
| 164 | return status; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | /* Send */ |
| 169 | status = pj_stun_session_send_msg(sess, PJ_TRUE, |
| 170 | src_addr, src_addr_len, tdata); |
| 171 | return status; |
| 172 | |
| 173 | } |
| 174 | |