[置顶] 【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.twaren.net/Unix/NonGNU//osip/libosip2-3.6.0.tar.gz
eXosip： http://download.savannah.gnu.org/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：

#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:[email protected]";   //UAC1，端口是15060
	char *registar="sip:[email protected]:15061"; //UAS,端口是15061
	char *source_call="sip:[email protected]";
	char *dest_call="sip:[email protected]: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);
}

第五步，编译UAS项目：

与UAC同样的设置后，编译

# 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:[email protected]";
   char *dest_call = "sip:[email protected]: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");
}
}
}

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

运行示意图：