| /* $Id$ */ |
| /* |
| * 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 <pjlib-util/stun_simple.h> |
| #include <pjlib-util/errno.h> |
| #include <pj/pool.h> |
| #include <pj/log.h> |
| #include <pj/sock.h> |
| #include <pj/os.h> |
| |
| #define THIS_FILE "stun_simple.c" |
| |
| PJ_DEF(pj_status_t) pjstun_create_bind_req( pj_pool_t *pool, |
| void **msg, pj_size_t *len, |
| pj_uint32_t id_hi, |
| pj_uint32_t id_lo) |
| { |
| pjstun_msg_hdr *hdr; |
| |
| PJ_CHECK_STACK(); |
| |
| |
| hdr = PJ_POOL_ZALLOC_T(pool, pjstun_msg_hdr); |
| if (!hdr) |
| return PJ_ENOMEM; |
| |
| hdr->type = pj_htons(PJSTUN_BINDING_REQUEST); |
| hdr->tsx[2] = pj_htonl(id_hi); |
| hdr->tsx[3] = pj_htonl(id_lo); |
| *msg = hdr; |
| *len = sizeof(pjstun_msg_hdr); |
| |
| return PJ_SUCCESS; |
| } |
| |
| PJ_DEF(pj_status_t) pjstun_parse_msg( void *buf, pj_size_t len, |
| pjstun_msg *msg) |
| { |
| pj_uint16_t msg_type, msg_len; |
| char *p_attr; |
| |
| PJ_CHECK_STACK(); |
| |
| msg->hdr = (pjstun_msg_hdr*)buf; |
| msg_type = pj_ntohs(msg->hdr->type); |
| |
| switch (msg_type) { |
| case PJSTUN_BINDING_REQUEST: |
| case PJSTUN_BINDING_RESPONSE: |
| case PJSTUN_BINDING_ERROR_RESPONSE: |
| case PJSTUN_SHARED_SECRET_REQUEST: |
| case PJSTUN_SHARED_SECRET_RESPONSE: |
| case PJSTUN_SHARED_SECRET_ERROR_RESPONSE: |
| break; |
| default: |
| PJ_LOG(4,(THIS_FILE, "Error: unknown msg type %d", msg_type)); |
| return PJLIB_UTIL_ESTUNINMSGTYPE; |
| } |
| |
| msg_len = pj_ntohs(msg->hdr->length); |
| if (msg_len != len - sizeof(pjstun_msg_hdr)) { |
| PJ_LOG(4,(THIS_FILE, "Error: invalid msg_len %d (expecting %d)", |
| msg_len, len - sizeof(pjstun_msg_hdr))); |
| return PJLIB_UTIL_ESTUNINMSGLEN; |
| } |
| |
| msg->attr_count = 0; |
| p_attr = (char*)buf + sizeof(pjstun_msg_hdr); |
| |
| while (msg_len > 0) { |
| pjstun_attr_hdr **attr = &msg->attr[msg->attr_count]; |
| pj_uint32_t len; |
| pj_uint16_t attr_type; |
| |
| *attr = (pjstun_attr_hdr*)p_attr; |
| len = pj_ntohs((pj_uint16_t) ((*attr)->length)) + sizeof(pjstun_attr_hdr); |
| len = (len + 3) & ~3; |
| |
| if (msg_len < len) { |
| PJ_LOG(4,(THIS_FILE, "Error: length mismatch in attr %d", |
| msg->attr_count)); |
| return PJLIB_UTIL_ESTUNINATTRLEN; |
| } |
| |
| attr_type = pj_ntohs((*attr)->type); |
| if (attr_type > PJSTUN_ATTR_REFLECTED_FROM && |
| attr_type != PJSTUN_ATTR_XOR_MAPPED_ADDR) |
| { |
| PJ_LOG(5,(THIS_FILE, "Warning: unknown attr type %x in attr %d. " |
| "Attribute was ignored.", |
| attr_type, msg->attr_count)); |
| } |
| |
| msg_len = (pj_uint16_t)(msg_len - len); |
| p_attr += len; |
| ++msg->attr_count; |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| PJ_DEF(void*) pjstun_msg_find_attr( pjstun_msg *msg, pjstun_attr_type t) |
| { |
| int i; |
| |
| PJ_CHECK_STACK(); |
| |
| for (i=0; i<msg->attr_count; ++i) { |
| pjstun_attr_hdr *attr = msg->attr[i]; |
| if (pj_ntohs(attr->type) == t) |
| return attr; |
| } |
| |
| return 0; |
| } |