【GBT28181开发：SIP协议实践】之Windows下编译eXosip、osip

【GBT28181开发：SIP协议实践】之Windows下编译eXosip、osip

 

今天开始了SIP开源库的学习，我选择了osip和eXosip，但是这两个库的编译使用有些麻烦，源码下来之后编译会出现很多问题，网上也没有找到完整的编译介绍，只能一步一步的找办法解决，最后终于编译成功！先大概记录下编译过程，后面还要再整理下。

期间还向CSDN论坛求助了下，但是还没有反应：http://bbs.csdn.net/topics/390499635?page=1#post-394866714

描述：error LNK2019: 无法解析的外部符号 _osip_transaction_set_naptr_record，该符号在函数 __eXosip_transaction_init 中被引用

原因：开源代码的库有些函数没有导出，需要手动在def文件中添加

解决方法：第二步的2,3两小步就是为了解决这个问题。

第一步，下载osip和eXosip

osip:    http://ftp./Unix/NonGNU//osip/libosip2-3.6.0.tar.gz
eXosip： http://download.savannah./releases/exosip/libeXosip2-3.6.0.tar.gz

第二步，解压，编译osip：

1.进入libosip2-3.6.0\platform\vsnet目录，用VS2010直接打开osip.sln文件，项目自动转换

2.更改libosip2-3.6.0\platform\vsnet\osip2.def 文件，在文件末尾追加
  
   osip_transaction_set_naptr_record @138

3.更改libosip2-3.6.0\platform\vsnet\osipparser2.def 文件，在文件末尾追加

   osip_realloc @416
   osip_strcasestr @417  
   __osip_uri_escape_userinfo @418


4.先编译osipparser2，再编译osip2，最后在libosip2-3.6.0\platform\vsnet\Debug DLL下生成库文件：

osip2.lib

osip2.dll
osipparser2.lib
osipparser2.dll

第三步，解压，编译eXosip

进入libeXosip2-3.6.0\platform\vsnet目录，用VS2010直接打开eXosip.sln文件，项目自动转换：

1.将osip2.lib,osip2.dll,osipparser2.lib,osipparser2.dll拷贝到Debug目录下
2.C/C++ --> 预处理器 --> 预处理器定义: 删除HAVE_OPENSSL_SSL_H
3.C/C++ --> 常规 --> 附加包含目录:     将osip的头文件libosip2-3.6.0\include包含进来

4.编译，生成eXosip.lib

第四步，新建UAC例子项目

1.链接器 --> 输入 --> 附加依赖项：增加静态库引用：Dnsapi.lib;Iphlpapi.lib;Ws2_32.lib;osip2.lib;osipparser2.lib;exosip.lib;

2.C/C++ -->常规 -->附加包含目录: 将osip和eXosip的头文件libosip2-3.6.0\include、libeXosip2-3.6.0\include包含进来

3.链接器 --> 常规  --> 附加库目录：将osip和eXosip的库包含进来，libeXosip2-3.6.0\platform\vsnet\Debug

4.编译UAC代码：

<span style="font-family:SimSun;">#include <eXosip2/eXosip.h>
#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>

int main(int argc,char *argv[])
{

    struct eXosip_t *context_eXosip;

    eXosip_event_t *je;
    osip_message_t *reg=NULL;
    osip_message_t *invite=NULL;
    osip_message_t *ack=NULL;
    osip_message_t *info=NULL;
    osip_message_t *message=NULL;

    int call_id,dialog_id;
    int i,flag;
    int flag1=1;

    char *identity="sip:140@127.0.0.1";   //UAC1，端口是15060
    char *registar="sip:133@127.0.0.1:15061"; //UAS,端口是15061
    char *source_call="sip:140@127.0.0.1";
    char *dest_call="sip:133@127.0.0.1:15061";
    //identify和register这一组地址是和source和destination地址相同的
    //在这个例子中，uac和uas通信，则source就是自己的地址，而目的地址就是uac1的地址
    char command;
    char tmp[4096];

    printf("r   向服务器注册\n\n");
    printf("c   取消注册\n\n");
    printf("i   发起呼叫请求\n\n");
    printf("h   挂断\n\n");
    printf("q   推出程序\n\n");
    printf("s   执行方法INFO\n\n");
    printf("m   执行方法MESSAGE\n\n");

    //初始化
    i=eXosip_init();

    if(i!=0)
    {
        printf("Couldn't initialize eXosip!\n");
        return -1;
    }
    else
    {
        printf("eXosip_init successfully!\n");
    }

    //绑定uac自己的端口15060，并进行端口监听
    i=eXosip_listen_addr(IPPROTO_UDP,NULL,15060,AF_INET,0);
    if(i!=0)
    {
        eXosip_quit();
        fprintf(stderr,"Couldn't initialize transport layer!\n");
        return -1;
    }
    flag=1;

    while(flag)
    {
        //输入命令
        printf("Please input the command:\n");
        scanf("%c",&command);
        getchar();

        switch(command)
        {
        case 'r':
            printf("This modal is not completed!\n");
            break;
        case 'i'://INVITE，发起呼叫请求
            i=eXosip_call_build_initial_invite(&invite,dest_call,source_call,NULL,"This is a call for conversation");
            if(i!=0)
            {
                printf("Initial INVITE failed!\n");
                break;
            }
            //符合SDP格式，其中属性a是自定义格式，也就是说可以存放自己的信息，
            //但是只能有两列，比如帐户信息
            //但是经过测试，格式vot必不可少，原因未知，估计是协议栈在传输时需要检查的
            _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");

            osip_message_set_body(invite,tmp,strlen(tmp));
            osip_message_set_content_type(invite,"application/sdp");

            eXosip_lock();
            i=eXosip_call_send_initial_invite(invite); //invite SIP INVITE message to send
            eXosip_unlock();

            //发送了INVITE消息，等待应答
            flag1=1;
            while(flag1)
            {
                je=eXosip_event_wait(0,200); //Wait for an eXosip event
                //(超时时间秒，超时时间毫秒)
                if(je==NULL)
                {
                    printf("No response or the time is over!\n");
                    break;
                }
                switch(je->type)   //可能会到来的事件类型
                {
                case EXOSIP_CALL_INVITE:   //收到一个INVITE请求
                    printf("a new invite received!\n");
                    break;
                case EXOSIP_CALL_PROCEEDING: //收到100 trying消息，表示请求正在处理中
                    printf("proceeding!\n");
                    break;
                case EXOSIP_CALL_RINGING:   //收到180 Ringing应答，表示接收到INVITE请求的UAS正在向被叫用户振铃
                    printf("ringing!\n");
                    printf("call_id is %d,dialog_id is %d \n",je->cid,je->did);
                    break;
                case EXOSIP_CALL_ANSWERED: //收到200 OK，表示请求已经被成功接受，用户应答
                    printf("ok!connected!\n");
                    call_id=je->cid;
                    dialog_id=je->did;
                    printf("call_id is %d,dialog_id is %d \n",je->cid,je->did);

                    //回送ack应答消息
                    eXosip_call_build_ack(je->did,&ack);
                    eXosip_call_send_ack(je->did,ack);
                    flag1=0; //推出While循环
                    break;
                case EXOSIP_CALL_CLOSED: //a BYE was received for this call
                    printf("the other sid closed!\n");
                    break;
                case EXOSIP_CALL_ACK: //ACK received for 200ok to INVITE
                    printf("ACK received!\n");
                    break;
                default: //收到其他应答
                    printf("other response!\n");
                    break;
                }
                eXosip_event_free(je); //Free ressource in an eXosip event
            }
            break;

        case 'h':   //挂断
            printf("Holded!\n");

            eXosip_lock();
            eXosip_call_terminate(call_id,dialog_id);
            eXosip_unlock();
            break;

        case 'c':
            printf("This modal is not commpleted!\n");
            break;

        case 's': //传输INFO方法
            eXosip_call_build_info(dialog_id,&info);
            _snprintf(tmp,4096,"\nThis is a sip message(Method:INFO)");
            osip_message_set_body(info,tmp,strlen(tmp));
            //格式可以任意设定，text/plain代表文本信息;
            osip_message_set_content_type(info,"text/plain");
            eXosip_call_send_request(dialog_id,info);
            break;

        case 'm':
            //传输MESSAGE方法，也就是即时消息，和INFO方法相比，我认为主要区别是：
            //MESSAGE不用建立连接，直接传输信息，而INFO消息必须在建立INVITE的基础上传输
            printf("the method : MESSAGE\n");
            eXosip_message_build_request(&message,"MESSAGE",dest_call,source_call,NULL);
            //内容，方法，      to       ，from      ，route
            _snprintf(tmp,4096,"This is a sip message(Method:MESSAGE)");
            osip_message_set_body(message,tmp,strlen(tmp));
            //假设格式是xml
            osip_message_set_content_type(message,"text/xml");
            eXosip_message_send_request(message);
            break;

        case 'q':
            eXosip_quit();
            printf("Exit the setup!\n");
            flag=0;
            break;
        }
    }

    return(0);
}</span>

第五步，编译UAS项目：

与UAC同样的设置后，编译

<span style="font-family:SimSun;"># include <eXosip2/eXosip.h>
# include <stdio.h>
# include <stdlib.h>
# include <Winsock2.h>


int main (int argc, char *argv[])
{
   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:140@127.0.0.1";
   char *dest_call = "sip:133@127.0.0.1:15060";//client ip
   char command;
   char tmp[4096];
   char localip[128];
   int pos = 0;
   //初始化sip
   i = eXosip_init ();
   if (i != 0)
{
   printf ("Can't initialize eXosip!\n");
   return -1;
}
   else
{
   printf ("eXosip_init successfully!\n");
}
   i = eXosip_listen_addr (IPPROTO_UDP, NULL, 15061, AF_INET, 0);
   if (i != 0)
{
   eXosip_quit ();
   fprintf (stderr, "eXosip_listen_addr error!\nCouldn'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
continue;
   // printf ("the cid is %s, did is %s/n", je->did, je->cid);
   switch (je->type)
{
case EXOSIP_MESSAGE_NEW://新的消息到来
   printf (" EXOSIP_MESSAGE_NEW!\n");
   if (MSG_IS_MESSAGE (je->request))//如果接受到的消息类型是MESSAGE
       {
   {
       osip_body_t *body;
       osip_message_get_body (je->request, 0, &body);
       printf ("I get the msg is: %s\n", body->body);
       //printf ("the cid is %s, did is %s/n", je->did, je->cid);
   }
   //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:
   //得到接收到消息的具体信息
         printf ("Received a INVITE msg from %s:%s, UserName is %s, password is %s\n",je->request->req_uri->host,
      je->request->req_uri->port, je->request->req_uri->username, je->request->req_uri->password);
   //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)
       {
      printf ("This request msg is invalid!Cann't response!\n");
      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);
      printf ("send 200 over!\n");
       }
   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
   printf ("the INFO is :\n");
   while (!osip_list_eol ( &(remote_sdp->a_attributes), pos))
       {
      sdp_attribute_t *at;

      at = (sdp_attribute_t *) osip_list_get ( &remote_sdp->a_attributes, pos);
      printf ("%s : %s\n", at->a_att_field, at->a_att_value);//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

      pos ++;
       }
   break;
case EXOSIP_CALL_ACK:
   printf ("ACK recieved!\n");
   // printf ("the cid is %s, did is %s/n", je->did, je->cid);
   break;
case EXOSIP_CALL_CLOSED:
   printf ("the remote hold the session!\n");
   // 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);
      printf ("bye send 200 over!\n");
       }
   break;
case EXOSIP_CALL_MESSAGE_NEW://至于该类型和EXOSIP_MESSAGE_NEW的区别，源代码这么解释的
/*
// request related events within calls (except INVITE)
      EXOSIP_CALL_MESSAGE_NEW,          < announce new incoming request.
// response received for request outside calls
         EXOSIP_MESSAGE_NEW,          < announce new incoming request.
         我也不是很明白，理解是：EXOSIP_CALL_MESSAGE_NEW是一个呼叫中的新的消息到来，比如ring trying都算，所以在接受到后必须判断
         该消息类型，EXOSIP_MESSAGE_NEW而是表示不是呼叫内的消息到来。
         该解释有不妥地方，仅供参考。
*/
   printf(" EXOSIP_CALL_MESSAGE_NEW\n");
   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);
       printf ("the body is %s\n", body->body);
      }
   }
   break;
default:
   printf ("Could not parse the msg!\n");
}
}
}
</span>

例子已经上传：http://download.csdn.net/detail/longlong530/5647749

运行示意图：