| /**
* 一个使用了 osip 和 eXosip 库的 UAS 代理服务端的演示程序
*
* - 只是简单的演示了使用了 osip 和 eXosip2 库的 UAS 代理服务端的如下几个功能：
*
* 编 译：g++ -I/usr/local/include -L/usr/local/lib ua_server.cpp -o ua_server -leXosip2 -losip2 -losipparser2 -lpthread
*
*/
#include <eXosip2/eXosip.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
eXosip_event_t *je = NULL;
osip_message_t *ack = NULL;
osip_message_t *invite = NULL;
osip_message_t *answer = NULL;
sdp_message_t *remote_sdp = NULL;
int call_id, dialog_id;
int i,j;
int id;
char *sour_call = "sip:[email protected]";
char *dest_call = "sip:[email protected]:5061"; //client ip/port
char command;
char tmp[4096];
char localip[128];
int pos = 0;
// 初始化 sip
i = eXosip_init ();
if (i != 0)
{
cerr << "/n/t--> Can't initialize eXosip!/n";
return -1;
}
else
{
cout << "/n/t--> eXosip_init successfully!/n";
}
i = eXosip_listen_addr (IPPROTO_UDP, NULL, 5060, AF_INET, 0);
if (i != 0)
{
eXosip_quit ();
cerr << "/n/t--> eXosip_listen_addr error! Couldn't initialize transport layer!/n";
}
for(;;)
{
// 侦听是否有消息到来
je = eXosip_event_wait (0, 50);
// 协议栈带有此语句,具体作用未知
eXosip_lock ();
eXosip_default_action (je);
eXosip_automatic_refresh ();
eXosip_unlock ();
if (je == NULL) // 没有接收到消息，继续
{
continue;
}
switch (je->type)
{
case EXOSIP_MESSAGE_NEW: // 新的消息到来
cout << "/n/t*** EXOSIP_MESSAGE_NEW!/n" << endl;
if (MSG_IS_MESSAGE (je->request)) // 如果接收到的消息类型是 MESSAGE
{
{
osip_body_t *body;
osip_message_get_body (je->request, 0, &body);
cout << "I get the msg is: " << body->body << endl;
}
// 按照规则，需要回复 OK 信息
eXosip_message_build_answer (je->tid, 200, &answer);
eXosip_message_send_answer (je->tid, 200, answer);
}
break;
case EXOSIP_CALL_INVITE: // INVITE 请求消息
// 得到接收到消息的具体信息
cout << "/n/tReceived a INVITE msg from " << je->request->req_uri->host
<< " : " << je->request->req_uri->port
<< ", username is " << je->request->req_uri->username << endl;
// 得到消息体,认为该消息就是 SDP 格式.
remote_sdp = eXosip_get_remote_sdp (je->did);
call_id = je->cid;
dialog_id = je->did;
eXosip_lock ();
eXosip_call_send_answer (je->tid, 180, NULL);
i = eXosip_call_build_answer (je->tid, 200, &answer);
if (i != 0)
{
cout << "/n/t--> This request msg is invalid! Cann't response!/n" << endl;
eXosip_call_send_answer (je->tid, 400, NULL);
}
else
{
snprintf (tmp, 4096,
"v=0/r/n"
"o=anonymous 0 0 IN IP4 0.0.0.0/r/n"
"t=1 10/r/n"
"a=username:rainfish/r/n"
"a=password:123/r/n");
// 设置回复的SDP消息体,下一步计划分析消息体
// 没有分析消息体，直接回复原来的消息，这一块做的不好。
osip_message_set_body (answer, tmp, strlen(tmp));
osip_message_set_content_type (answer, "application/sdp");
eXosip_call_send_answer (je->tid, 200, answer);
cout << "/n/t--> send 200 over!" << endl;
}
eXosip_unlock ();
// 显示出在 sdp 消息体中的 attribute 的内容,里面计划存放我们的信息
cout << "/n/t--> The INFO is :/n" ;
while (!osip_list_eol ( &(remote_sdp->a_attributes), pos))
{
sdp_attribute_t *at;
//这里解释了为什么在SDP消息体中属性a里面存放必须是两列
at = (sdp_attribute_t *) osip_list_get ( &remote_sdp->a_attributes, pos);
cout << "/n/t" << at->a_att_field
<< " : " << at->a_att_value << endl;
pos ++;
}
break;
case EXOSIP_CALL_ACK:
cout << "/n/t--> ACK recieved!/n" << endl;
// printf ("the cid is %s, did is %s/n", je->did, je->cid);
break;
case EXOSIP_CALL_CLOSED:
cout << "/n/t--> the remote hold the session!/n" << endl;
// eXosip_call_build_ack(dialog_id, &ack);
// eXosip_call_send_ack(dialog_id, ack);
i = eXosip_call_build_answer (je->tid, 200, &answer);
if (i != 0)
{
printf ("This request msg is invalid!Cann't response!/n");
eXosip_call_send_answer (je->tid, 400, NULL);
}
else
{
eXosip_call_send_answer (je->tid, 200, answer);
cout << "/n/t--> bye send 200 over!/n";
}
break;
case EXOSIP_CALL_MESSAGE_NEW:
cout << "/n/t*** EXOSIP_CALL_MESSAGE_NEW/n" << endl;
if (MSG_IS_INFO(je->request) ) // 如果传输的是 INFO 方法
{
eXosip_lock ();
i = eXosip_call_build_answer (je->tid, 200, &answer);
if (i == 0)
{
eXosip_call_send_answer (je->tid, 200, answer);
}
eXosip_unlock ();
{
osip_body_t *body;
osip_message_get_body (je->request, 0, &body);
cout << "the body is " << body->body << endl;
}
}
break;
default:
cout << "/n/t--> Could not parse the msg!/n" << endl;
}
}
return 0;
}
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