当前位置: 首页 > 工具软件 > eXosip > 使用案例 >

GB28181学习之路——eXosip获取IP和端口

陆洛城
2023-12-01

当设备注册进来时,我们需要记录下设备的IP和端口,以便后续与其进行通信,其实好多地方都可以获取到,但是不一定是准确的,尤其是经过映射的地址更是不好难以捕捉。

今天写一下怎么样获取设备的IP和端口,对映射与非映射同样有效。先构造获answer,然后再answer的Via header中取,这时answer中含有映射地址的信息:

if (MSG_IS_REGISTER(je->request))
{
    int i = eXosip_message_build_answer (m_Ctx, je->tid, 200, &asw_register);
    if(i != 0)
        return;
    char addr[20];
    int port;
    memset(addr, '\0', strlen(addr));
    osip_via_t* via = nullptr;
    osip_message_get_via(asw_register, 0, &via);
    if(!via || !via->host)
    {
        eXosip_lock (m_Ctx);
        eXosip_message_send_answer (m_Ctx, je->tid, 400, NULL);
        eXosip_unlock (m_Ctx);
        return;
    }
    osip_generic_param_t* br = nullptr;
    osip_via_param_get_byname (via, "received", &br);
    if (br != NULL && br->gvalue != NULL)
        strcpy(addr, br->gvalue);
    else
        strcpy(addr, via->host);
    
    osip_via_param_get_byname(via, "rport", &br);
    if(!br || !br->gvalue)
    {
        eXosip_message_send_answer (m_Ctx, je->tid, 400, NULL);
        return;
    }
    port = atoi(br->gvalue);
    eXosip_lock (m_Ctx);
    eXosip_message_send_answer (m_Ctx, je->tid, 200, asw_register);
    eXosip_unlock (m_Ctx);
}

 

 类似资料: