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:
1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <assert.h> 5 6 #include "soaph.h" 7 #include "stdsoap2.h" 8 #include "soapstub.h" 9 #include "wsseapi.h" 10 11 #include "wsdd.nsmap" //命名空间 12 13 static struct soap* onvif_initsoap(struct soap_env__header *header, const char *was_to, const char *was_action, int timeout) 14 { 15 struct soap *soap = null; // soap环境变量 16 unsigned char macaddr[6]; 17 char _hwid[1024]; 18 unsigned int flagrand; 19 20 soap = soap_new(); 21 if(soap == null) 22 { 23 printf("[%d]soap = nulln", __line__); 24 return null; 25 } 26 27 soap_set_namespaces(soap, namespaces); // 设置soap的namespaces,即设置命名空间 28 29 // 设置超时(超过指定时间没有数据就退出) 30 if(timeout > 0) 31 { 32 soap->recv_timeout = timeout; 33 soap->send_timeout = timeout; 34 soap->connect_timeout = timeout; 35 } 36 else 37 { 38 //maximum waittime : 20s 39 soap->recv_timeout = 20; 40 soap->send_timeout = 20; 41 soap->connect_timeout = 20; 42 } 43 44 soap_default_soap_env__header(soap, header); 45 46 //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 47 srand((int)time(0)); 48 flagrand = rand()%9000 + 8888; 49 macaddr[0] = 0x1; 50 macaddr[1] = 0x2; 51 macaddr[2] = 0x3; 52 macaddr[3] = 0x4; 53 macaddr[4] = 0x5; 54 macaddr[5] = 0x6; 55 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]); 56 header->wsa__messageid = (char *)malloc(100); 57 memset(header->wsa__messageid, 0, 100); 58 strncpy(header->wsa__messageid, _hwid, strlen(_hwid)); //wsa__messageid存放的是uuid 59 60 if(was_action != null) 61 { 62 header->wsa__action = (char*)malloc(1024); 63 memset(header->wsa__action, ' ', 1024); 64 strncpy(header->wsa__action, was_action, 1024); // 65 } 66 if(was_to != null) 67 { 68 header->wsa__to = (char *)malloc(1024); 69 memset(header->wsa__to, ' ', 1024); 70 strncpy(header->wsa__to, was_to, 1024);//"urn:schemas-xmlsoap-org:ws:2005:04:discovery"; 71 } 72 soap->header = header; 73 return soap; 74 } 75 76 77 //释放函数 78 void onvif_soap_delete(struct soap *soap) 79 { 80 soap_destroy(soap); // remove deserialized class instances (c++ only) 81 soap_end(soap); // clean up deserialized data (except class instances) and temporary data 82 soap_free(soap); // reset and deallocate the context created with soap_new or soap_copy 83 } 84 85 86 //鉴权 87 static int onvif_setauthinfo(struct soap *soap, const char *username, const char *password) 88 { 89 int result = 0; 90 if((null != username) || (null != password)){ 91 soap_wsse_add_usernametokendigest(soap, null, username, password); 92 }else{ 93 printf("un etauthn"); 94 result = -1; 95 } 96 97 return result; 98 } 99 100 101 102 int main(int argc,char *argv[]) 103 { 104 int ret = 0; 105 char sercer_addr[] = "https://172.168.0.211/onvif/device_service"; //设备搜索得到的地址 106 107 struct soap_env__header header; 108 struct soap* soap = onvif_initsoap(&header, null, null, 5); 109 110 struct _tds__getcapabilities *req; 111 struct _tds__getcapabilitiesresponse *response; 112 113 if(null == (req = (struct _tds__getcapabilities *)calloc(1,sizeof(struct _tds__getcapabilities)))) 114 { 115 printf("calloc is error n"); 116 ret = -1; 117 return ret; 118 }else{ 119 req->__sizecategory = 1; 120 req->category = (enum tt__capabilitycategory *)soap_malloc(soap, sizeof(int)); 121 *(req->category) = (enum tt__capabilitycategory)5; //5表示:tt__capabilitycategory__media 122 123 onvif_setauthinfo(soap,"admin","hk123456"); //鉴权,输入摄像头的用户名、密码 124 ret = soap_call___tds__getcapabilities(soap, sercer_addr, null,req, response); 125 if(soap->error){ 126 ret = -1; 127 printf("soap error: %d, %s, %sn", soap->error, *soap_faultcode(soap), *soap_faultstring(soap)); 128 return ret; 129 }else{; 130 if(null != response->capabilities) 131 { 132 if (response->capabilities->media != null){ 133 if (response->capabilities->media->xaddr != null){ 134 printf(" media_addr: %s n", response->capabilities->media->xaddr); 135 } 136 } 137 } 138 } 139 } 140 141 if(null != req) 142 { 143 free(req); 144 req = null; 145 } 146 147 onvif_soap_delete(soap); 148 return ret; 149 }
在编译之前要把:stdsoap2.c soapc.c md5.c dom.c mecevp.c smdevp.c threads.c wsaapi.c wsseapi.c soapclient.c 把这些.c 还有有些配套的.h 拷贝到当前工作目录下。
如果出现以下错误要在编译的时候加:-dwith_openssl
/tmp/cccao7u5.o:在函数‘soap_mec_init’中:
mecevp.c:(.text+0xe):对‘soap_ssl_init’未定义的引用
/tmp/ccv2yl3q.o:在函数‘soap_smd_init’中:
smdevp.c:(.text+0x24c):对‘soap_ssl_init’未定义的引用
编译:gcc -o test get_uri_test.c stdsoap2.c soapc.c md5.c dom.c mecevp.c smdevp.c threads.c wsaapi.c wsseapi.c soapclient.c -i import/ -dwith_openssl -lssl -lcrypto -ldl -pthread
结果:成功得到我们想要的媒体地址
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