osip及eXosip的编译方法
在最新版本的osip2、exosip2中不支持在VC6.0下编译osip、exosip协议栈的方法
说明：
1.以下文章中的osip版本为3.1.0
2.eXosip版本为3.1.0
3.编译环境为：Windows XP 专业版本+VS 2005
4.实例程序下载：http://download.csdn.net/source/617797
5.osip、exosip、openssl的开发包下载，开发包包括：osip2.dll、osipparser2.dll、exosip2.dll、libeay32.dll、ssleay32.dll和相对应的lib文件，下载地址同上
第一步，下载：
到http://download.savannah.gnu.org/releases/osip/libosip2-3.1.0.tar.gz
下载最新的osip库并解压
到http://download.savannah.gnu.org/releases/exosip/libeXosip2-3.1.0.tar.gz
下载最新的eXsoip库并解压
第二步，编译osip3.1.0：
1.用VS2005打开libosip2-3.1.0/platform/vsnet/osip.sln
2.对osip2和osipparser2项目生成Release DLL
3.其生成的LIB/DLL 位于：libosip2-3.1.0/platform/vsnet/Release DLL/下
4.如果有出现外部变量找不到的情况，很有可能是生成的dll没有实现该函数，在def文件中删除找不到的外部变量就好了
第三步，编译eXosip3.1.0：
1.用VS2005打开libeXosip2-3.1/platform/vsnet/eXosip.sln
2.将libosip2-3.1/include/osip2目录COPY到libeXosip2-3.1/include/下
3.将libosip2-3.1/include/osipparser2目录COPY到libeXosip2-3.1/include/下
4.在libeXosip2-3.1目录下新建lib目录
5.将“第二步”中生成的libosip2-3.1/platform/vsnet/Release DLL/osip2.lib文件COPY到libeXosip2-3.1/lib目录下
6.将“第二步”中生成的libosip2-3.1/platform/vsnet/Release DLL/osipparser2.lib文件COPY到libeXosip2-3.1/lib目录下
7.修改项目属性，新增Dnsapi.lib Iphlpapi.lib Ws2_32.lib osip2.lib osipparser2.lib库输入
8.修改项目属性，新增库目录../../lib
9.修改项目的输出为.DLL，默认为.lib
10.编译Relase DLL
11.其生成的LIB/DLL 位于：libeXosip2-3.1/platform/vsnet/Release/下
注意：
在eXoSip.def 中添加下面函数的导出,不知道是为什么 这些函数没有导出!
eXosip_call_set_reference
eXosip_call_build_initial_invite
eXosip_call_send_initial_invite
eXosip_call_build_request
eXosip_call_build_ack
eXosip_call_send_ack
eXosip_call_build_refer
eXosip_call_build_info
eXosip_call_build_options
eXosip_call_build_update
eXosip_call_build_notify
eXosip_call_send_request
eXosip_call_build_answer
eXosip_call_send_answer
eXosip_call_terminate
eXosip_call_build_prack
eXosip_call_send_prack
eXosip_call_get_referto
eXosip_call_find_by_replaces
编译osip可能会出现如下错误：
1：在osipparser.dll的def文件会出现几个拼写错误，如缺少MD5_****的函数前面缺少osip_,使得连接器出现link2019错误，解决方法是在前面加上osip_
2：但是如果在编译的时候出现错误：
libnet_prand.obj : error LNK2001: unresolved external symbol __imp__CryptReleaseContext@8
libnet_prand.obj : error LNK2001: unresolved external symbol __imp__CryptGenRandom@12
libnet_prand.obj : error LNK2001: unresolved external symbol __imp__CryptAcquireContextA@20
Debug/Libnet.dll : fatal error LNK1120: 3 unresolved externals
仔细看了下，CryptReleaseContext等这三个函数不是从advapi32.lib里导入的么？难道要加上advapi32.lib库？在项目设置的连接里把advapi32.lib加上，然后rebuil all，果然成功。
如果出现是__RTC_CheckEsp这个外部变量无法解析，很大可能是两个项目的配置不一样，比如说一个能从父项目继承什么。另外一个没有设置，就会出现这个问题。
编译eXosip可能会出现的问题：
要包含头文件：ssleay32.lib libeay32.lib Dnsapi.lib Iphlpapi.lib Ws2_32.lib osip2.lib osipparser2.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib ，其中ssleay32.lib libeay32.lib是openssl的静态库。
可能还会找不到一些无法解析的外部变量，可能是在osip的输出dll的def文件中没有加上
osip_transaction_set_srv_record @122
然后重新编译osip
外部变量问题，一般都是库文件的问题，记住要把库文件放在工程目录lib目录下（没有lib目录自己新建一个） 然后在工具->项目->c/c++->C++目录下把设置../../lib设置成包含的目录
其中ssleay32.lib libeay32.lib是openssl编译形成的静态链接库，可以从网上下载，或者自己编译
之外，尤其大家下载的源代码由于认为的或者是编译环境的不同，容易造成多种错误，我还碰到了个无法解析的Osip_^^^!!#@!@#!函数无法解析的情况，在osip中的def文件一查，果然缺少个122的函数文件输出声明，加进去重新编译osip，成功，在编译eXosip成功！
最后运行实例,进行项目配置：
osip及eXosip的开发方法：
将以下程序作为UAS.CPP保存
// UAS.cpp : 定义控制台应用程序的入口点。 // # include <eXosip2/eXosip.h> # include <stdio.h> # include <stdlib.h> # include <Winsock2.h> /* # include <netinet/in.h> # include <sys/socket.h> # include <sys/types.h> */ #pragma comment(lib, "osip2.lib") #pragma comment(lib, "osipparser2.lib") #pragma comment(lib, "eXosip.lib") #pragma comment(lib, "Iphlpapi.lib") #pragma comment(lib, "Dnsapi.lib") #pragma comment(lib, "ws2_32.lib") 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:24@10.16.79.24"; char *dest_call = "sip:24@10.16.79.24:5061";//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, 5060, 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"); break; } } }
将以下程序作为UAC.CPP保存
// UAC.cpp : 定义控制台应用程序的入口点。 // # include <eXosip2/eXosip.h> # include <stdio.h> # include <stdlib.h> # include <Winsock2.h> /* ＃i nclude <netinet/in.h> ＃i nclude <sys/socket.h> ＃i nclude <sys/types.h> */ #pragma comment(lib, "osip2.lib") #pragma comment(lib, "osipparser2.lib") #pragma comment(lib, "eXosip.lib") #pragma comment(lib, "Iphlpapi.lib") #pragma comment(lib, "Dnsapi.lib") #pragma comment(lib, "ws2_32.lib") int main (int argc, char *argv[]) { 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; int id; char *identity = "sip:24@10.16.79.24"; char *registerer = "sip:10.16.79.24:5060";//server ip char *source_call = "sip:24@10.16.79.24"; char *dest_call = "sip:24@10.16.79.24:5060";//server ip char command; char tmp[4096]; char localip[128]; 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 退出程序/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"); } i = eXosip_listen_addr (IPPROTO_UDP, NULL, 5061, AF_INET, 0); if (i != 0) { eXosip_quit (); fprintf (stderr, "Couldn't initialize transport layer!/n"); return -1; } flag = 1; while (flag) { printf ("please input the comand:/n"); scanf ("%c", &command); getchar (); switch (command) { case 'r': printf ("This modal isn't commpleted!/n"); break; case 'i':/* INVITE */ i = eXosip_call_build_initial_invite (&invite, dest_call, source_call, NULL, "This si a call for a conversation"); if (i != 0) { printf ("Intial 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, 但是只能是两列,比如帐户信息 但是经测试,格式:v o t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); eXosip_unlock (); flag1 = 1; while (flag1) { je = eXosip_event_wait (0, 200); if (je == NULL) { printf ("No response or the time is over!/n"); break; } switch (je->type) { case EXOSIP_CALL_INVITE: printf ("a new invite reveived!/n"); break; case EXOSIP_CALL_PROCEEDING: printf ("proceeding!/n"); break; case EXOSIP_CALL_RINGING: printf ("ringing!/n"); // call_id = je->cid; // dialog_id = je->did; printf ("call_id is %d, dialog_id is %d /n", je->cid, je->did); break; case EXOSIP_CALL_ANSWERED: 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); eXosip_call_build_ack (je->did, &ack); eXosip_call_send_ack (je->did, ack); flag1 = 0; break; case EXOSIP_CALL_CLOSED: printf ("the other sid closed!/n"); break; case EXOSIP_CALL_ACK: printf ("ACK received!/n"); break; default: printf ("other response!/n"); break; } eXosip_event_free (je); } break; case 'h': printf ("Holded !/n"); eXosip_lock (); eXosip_call_terminate (call_id, dialog_id); eXosip_unlock (); break; case 'c': printf ("This modal isn't commpleted!/n"); break; case 's': //传输INFO方法 eXosip_call_build_info (dialog_id, &info); snprintf (tmp, 4096, "hello,rainfish"); 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必须在建立INVITE的基础上传输。 */ printf ("the mothed :MESSAGE/n"); eXosip_message_build_request (&message, "MESSAGE", dest_call, source_call, NULL); snprintf (tmp, 4096, "hellor rainfish"); 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); }