GetCapabilities:获取能力,主要目的获取设备能力信息（获取媒体服务地址）

鉴权：但是在调用获取设备能力之前是需要鉴权的。ONVIF协议规定，部分接口需要鉴权，部分接口不需要鉴权，在调用需要鉴权的接口时不使用鉴权，会导致接口调用失败。实现鉴权的方式之一可以调用gSOAP源码中的 soap_wsse_add_UsernameTokenDigest()函数。要安装依赖库OpenSSL

实现代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
 
#include "soapH.h"
#include "stdsoap2.h"
#include "soapStub.h"
#include "wsseapi.h"
 
#include "wsdd.nsmap" //命名空间
 
static struct soap* ONVIF_Initsoap(struct SOAP_ENV__Header *header, const char *was_To, const char *was_Action, int timeout)
{
    struct soap *soap = NULL;    // soap环境变量
    unsigned char macaddr[6];
    char _HwId[1024];
    unsigned int Flagrand;
 
    soap = soap_new();
    if(soap == NULL)
    {
        printf("[%d]soap = NULL\n", __LINE__);
        return NULL;
    }
 
    soap_set_namespaces(soap, namespaces);   // 设置soap的namespaces，即设置命名空间
 
    // 设置超时（超过指定时间没有数据就退出）
    if(timeout > 0)
    {
        soap->recv_timeout = timeout;
        soap->send_timeout = timeout;
        soap->connect_timeout = timeout;
    }
    else
    {
        //Maximum waittime : 20s
        soap->recv_timeout  = 20;
        soap->send_timeout  = 20;
        soap->connect_timeout = 20;
    }
 
    soap_default_SOAP_ENV__Header(soap, header);
 
    //Create SessionID randomly,生成uuid(windows下叫guid，linux下叫uuid)，格式为urn:uuid:8-4-4-4-12，由系统随机产生
    srand((int)time(0));
    Flagrand = rand()%9000 + 8888;
    macaddr[0] = 0x1;
    macaddr[1] = 0x2;
    macaddr[2] = 0x3;
    macaddr[3] = 0x4;
    macaddr[4] = 0x5;
    macaddr[5] = 0x6;
    sprintf(_HwId, "urn:uuid:%ud68a-1dd2-11b2-a105-%02X%02X%02X%02X%02X%02X", Flagrand, macaddr[0], macaddr[1], macaddr[2],macaddr[3],macaddr[4],macaddr[5]);
    header->wsa__MessageID = (char *)malloc(100);  
    memset(header->wsa__MessageID, 0, 100);
    strncpy(header->wsa__MessageID, _HwId, strlen(_HwId));    //wsa__MessageID存放的是uuid
 
    if(was_Action != NULL)
    {
        header->wsa__Action = (char*)malloc(1024);
        memset(header->wsa__Action, '\0', 1024);
        strncpy(header->wsa__Action, was_Action, 1024); //
    }
    if(was_To != NULL)
    {
        header->wsa__To = (char *)malloc(1024);
        memset(header->wsa__To, '\0', 1024);
        strncpy(header->wsa__To, was_To, 1024);//"urn:schemas-xmlsoap-org:ws:2005:04:discovery";
    }
    soap->header = header;
    return soap;
}
 
 
//释放函数
void ONVIF_soap_delete(struct soap *soap)
{
    soap_destroy(soap);                      // remove deserialized class instances (C++ only)
    soap_end(soap);                          // Clean up deserialized data (except class instances) and temporary data
    soap_free(soap);                         // Reset and deallocate the context created with soap_new or soap_copy
}
 
 
//鉴权
static int ONVIF_SetAuthInfo(struct soap *soap, const char *username, const char *password)
{
    int result = 0;
    if((NULL != username) || (NULL != password)){
        soap_wsse_add_UsernameTokenDigest(soap, NULL, username, password);
    }else{
        printf("un etAuth\n");
        result = -1;
    }
 
    return result;
}
 
 
 
int main(int argc,char *argv[])
{
    int ret = 0;