眼下ONVIF协议家族设备已占领数字监控行业半壁江山以上，亲，作为开发人员的你还在犹豫是否了解下吗？本文介绍了ONVIFclient从设备搜索。鉴权，能力获取，媒体信息获取。URI地址获取的整套流程。文章仅仅讲述了比較重要或其它博文没有讲述的开发点，具体能够參考文末參考文章。

最后，能获得rtsp地址之后。然后去做其它功能比方录像，ptz这些就很得心应手了。本文出自CSDN-固本培元 ，转载注明出自：leolupy@gmail.com。

       ONVIF致力于通过全球性的开放接口标准来推进网络视频在安防市场的应用，这一接口标准将确保不同厂商生产的网络视频产品具有互通性。2008年11月，论坛正式公布了ONVIF第一版规范——ONVIF核心规范1.0。随着视频监控的网络化应用，产业链的分工将越来越细。有些厂商专门做摄像头，有些厂商专门做DVS，有些厂商则可能专门做平台等，然后通过集成商进行集成，提供给终于客户。这样的产业合作模式，已经迫切的须要行业提供越来越标准化的接口平台。

流程总览：

本文开发环境：Centos6.4  Gsoap:2.8.16  soap:1.2 onvif:2.4 。 注： 本文提供的參考代码事实上网上都能够找到。这里做一个整理，供大家交流学习，共同提高。

搜索：Probe： 发现网络摄像头，获取webserver地址

http://192.168.15.240/onvif/device_service

能力获取：GetCapabilities：获取设备能力文件，从中识别出媒体信息地址URI：  http://192.168.15.240/onvif/Media

媒体信息获取：GetProfiles： 获取媒体信息文件，识别主通道、子通道的视频编码分辨率

RTSP地址获取：GetStreamUri：获取指定通道的流媒体地址  rtsp://192.168.15.240:554/Streaming/Channels/2?transportmode=unicast

1.下载Gsoap：地址：http://sourceforge.net/projects/gsoap2/files/gSOAP/

2.安装：  ./configure && make && make install

期间可能会有一些报错。自己解决哦。

3.离线或者在线生成onvif.h。假设不须要最新的版本号推荐离线方式。笔者使用的是这样的方式。

离线文件下载地址：感谢guog先生的共享：

命令：

wsdl2h -o onvif.h -c -s -t ./typemap.dat devicemgmt.wsdl media.wsdl event.wsdl display.wsdl deviceio.wsdl imaging.wsdl ptz.wsdl receiver.wsdl recording.wsdl search.wsdl remotediscovery.wsdl replay.wsdl analytics.wsdl analyticsdevice.wsdl actionengine.wsdl accesscontrol.wsdl doorcontrol.wsdl 

离线文件在：

http://download.csdn.net/detail/u011597695/5875143

在线命令：

wsdl2h -o onvif.h -c -s -t ./typemap.dat http://www.onvif.org/onvif/ver10/device/wsdl/devicemgmt.wsdl http://www.onvif.org/onvif/ver10/media/wsdl/media.wsdl http://www.onvif.org/onvif/ver10/event/wsdl/event.wsdl http://www.onvif.org/onvif/ver10/display.wsdl http://www.onvif.org/onvif/ver10/deviceio.wsdl http://www.onvif.org/onvif/ver20/imaging/wsdl/imaging.wsdl http://www.onvif.org/onvif/ver20/ptz/wsdl/ptz.wsdl http://www.onvif.org/onvif/ver10/receiver.wsdl  http://www.onvif.org/onvif/ver10/recording.wsdl http://www.onvif.org/onvif/ver10/search.wsdl http://www.onvif.org/onvif/ver10/network/wsdl/remotediscovery.wsdl http://www.onvif.org/onvif/ver10/replay.wsdl http://www.onvif.org/onvif/ver20/analytics/wsdl/analytics.wsdl http://www.onvif.org/onvif/ver10/analyticsdevice.wsdl http://www.onvif.org/ver10/actionengine.wsdl http://www.onvif.org/ver10/pacs/accesscontrol.wsdl http://www.onvif.org/ver10/pacs/doorcontrol.wsdl 

（记得拷贝gsoap的typemap文件至生成文件夹下，wsdl2h命令须要这个。

）

离线命令：

wsdl2h -o onvif.h -c -s -t ./typemap.dat devicemgmt.wsdl media.wsdl event.wsdl display.wsdl deviceio.wsdl imaging.wsdl ptz.wsdl receiver.wsdl recording.wsdl search.wsdl remotediscovery.wsdl replay.wsdl analytics.wsdl analyticsdevice.wsdl actionengine.wsdl accesscontrol.wsdl doorcontrol.wsdl 

如今能够開始生成了：例如以下：

假设直接生成相应C的库文件会发生反复定义错误，能够改动该文件。

wsa5.h(288): **ERROR**: remote method name clash: struct/class 'SOAP_ENV__Fault' already declared at line 274

打开文件gsoap_2.8.16/gsoap-2.8/gsoap/import/ wsa5.h

将277行int SOAP_ENV__Fault改动为int SOAP_ENV__Fault_alex

笔者没有使用这样的方法，是将这个结构体直接凝视的方式，最后的结果是。都能够使用。

同一时候上一步生成的onvif.h文件里没有打开wsse.h， 导致最后生成代码中SOAP_ENV__Header 结构体中缺少定义 wsse__Security数据段，无法进行鉴权命令。

即：加入对openssl的支持，在上一步生成的onvif.h中加入（可选）

随后使用命令生成：

soapcpp2  -c onvif.h -x -I/root/Tools/Gsoap/gsoap-2.8/gsoap/import -I/root/Tools/Gsoap/gsoap-2.8/gsoap/ -I/root/Tools/Gsoap/gsoap-2.8/gsoap/custom -I/root/Tools/Gsoap/gsoap-2.8/gsoap/extras -I/root/Tools/Gsoap/gsoap-2.8/gsoap/plugin 

到此为止。基于 C 的client和server的Onvif开发框架及已经搭建完毕。

搜索发现的基本原理是：设备上server监听239.255.255.250的3702port。所以，假设要实现跨网段搜索onvif设备须要路由的支持。仅仅要组播数据包能收到，设备就能被搜到。

原理是这样。參考代码：

struct soap* NewSoap(struct SOAP_ENV__Header *header,struct soap* soap,wsdd__ProbeType *req_,wsdd__ScopesType *sScope_)
{soap = soap_new();if(NULL == soap ){printf("sopa new error\r\n");return NULL;}soap->recv_timeout = 5;soap_set_namespaces(soap, namespaces);soap_default_SOAP_ENV__Header(soap, header);uuid_t uuid;char guid_string[100];uuid_generate(uuid);uuid_unparse(uuid, guid_string);header->wsa__MessageID = guid_string;header->wsa__To = "urn:schemas-xmlsoap-org:ws:2005:04:discovery";header->wsa__Action = "http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe";soap->header = header;soap_default_wsdd__ScopesType(soap, sScope_);sScope_->__item = "";soap_default_wsdd__ProbeType(soap, req_);req_->Scopes = sScope_;req_->Types = ""; //"dn:NetworkVideoTransmitter";return soap ;
}

int i = 0;      result = soap_send___wsdd__Probe(soap, MULTICAST_ADDRESS, NULL, &req);while(result == SOAP_OK){result = soap_recv___wsdd__ProbeMatches(soap, &resp);if(result == SOAP_OK){if(soap->error)  {printf("soap error 1: %d, %s, %s\n", soap->error, *soap_faultcode(soap), *soap_faultstring(soap));result = soap->error;}else{printf("Onvif Device detected *********************************************\r\n");for(i = 0; i < resp.wsdd__ProbeMatches->__sizeProbeMatch; i++){printf("__sizeProbeMatch        : %d\r\n", resp.wsdd__ProbeMatches->__sizeProbeMatch);  printf("wsa__EndpointReference       : %p\r\n", resp.wsdd__ProbeMatches->ProbeMatch->wsa__EndpointReference);  printf("Target EP Address       : %s\r\n", resp.wsdd__ProbeMatches->ProbeMatch->wsa__EndpointReference.Address);  printf("Target Type             : %s\r\n", resp.wsdd__ProbeMatches->ProbeMatch->Types);  printf("Target Service Address  : %s\r\n", resp.wsdd__ProbeMatches->ProbeMatch->XAddrs);  printf("Target Metadata Version : %d\r\n", resp.wsdd__ProbeMatches->ProbeMatch->MetadataVersion);  if(resp.wsdd__ProbeMatches->ProbeMatch->Scopes)  {printf("Target Scopes Address   : %s\r\n", resp.wsdd__ProbeMatches->ProbeMatch->Scopes->__item);}}break;}}else if (soap->error){printf("[%d] soap error 2: %d, %s, %s\n", __LINE__, soap->error, *soap_faultcode(soap), *soap_faultstring(soap));result = soap->error;}}

注：搜索到的设备能够增加到自己的设备管理中。这里就不做过多的说明了。

鉴权的实现能够非常easy也能够非常难。这里笔者使用的是gsoap提供的方法：直接调用就可以：

soap_wsse_add_UsernameTokenDigest(soap,"user", ONVIF_USER, ONVIF_PASSWORD);

原理也非常easy明确事实上，就是讲http的soap消息增加相应header中xml的元素而已。然后敏感消息digest MD5加密编码。

所以编译过程中须要使用 lcrypto 也就非常正常了。

soap 的http消息通信。參考代码：

void UserGetCapabilities(struct soap *soap ,struct __wsdd__ProbeMatches *resp,struct _tds__GetCapabilities *capa_req,struct _tds__GetCapabilitiesResponse *capa_resp)
{capa_req->Category = (enum tt__CapabilityCategory *)soap_malloc(soap, sizeof(int));capa_req->__sizeCategory = 1;*(capa_req->Category) = (enum tt__CapabilityCategory)(tt__CapabilityCategory__Media);capa_resp->Capabilities = (struct tt__Capabilities*)soap_malloc(soap,sizeof(struct tt__Capabilities)) ;soap_wsse_add_UsernameTokenDigest(soap,"user", ONVIF_USER, ONVIF_PASSWORD);printf("\n--------------------Now Gettting Capabilities NOW --------------------\n\n");int result = soap_call___tds__GetCapabilities(soap, resp->wsdd__ProbeMatches->ProbeMatch->XAddrs, NULL, capa_req, capa_resp);if (soap->error){printf("[%s][%d]--->>> soap error: %d, %s, %s\n", __func__, __LINE__, soap->error, *soap_faultcode(soap), *soap_faultstring(soap));int retval = soap->error;exit(-1) ;}else{printf(" \n--------------------GetCapabilities  OK! result=%d--------------\n \n",result);if(capa_resp->Capabilities==NULL){printf(" GetCapabilities  failed!  result=%d \n",result);}else{printf(" Media->XAddr=%s \n", capa_resp->Capabilities->Media->XAddr);}}
}

soap 的http消息通信，參考代码：

void UserGetProfiles(struct soap *soap,struct _trt__GetProfiles *trt__GetProfiles,struct _trt__GetProfilesResponse *trt__GetProfilesResponse ,struct _tds__GetCapabilitiesResponse *capa_resp)
{int result=0 ;printf("\n-------------------Getting Onvif Devices Profiles--------------\n\n");soap_wsse_add_UsernameTokenDigest(soap,"user", ONVIF_USER, ONVIF_PASSWORD);result = soap_call___trt__GetProfiles(soap, capa_resp->Capabilities->Media->XAddr, NULL, trt__GetProfiles, trt__GetProfilesResponse);if (result==-1)//NOTE: it may be regular if result isn't SOAP_OK.Because some attributes aren't supported by server.//any question email leoluopy@gmail.com{printf("soap error: %d, %s, %s\n", soap->error, *soap_faultcode(soap), *soap_faultstring(soap));result = soap->error;exit(-1);}else{printf("\n-------------------Profiles Get OK--------------\n\n");if(trt__GetProfilesResponse->Profiles!=NULL){if(trt__GetProfilesResponse->Profiles->Name!=NULL){printf("Profiles Name:%s  \n",trt__GetProfilesResponse->Profiles->Name);}if(trt__GetProfilesResponse->Profiles->token!=NULL){printf("Profiles Taken:%s\n",trt__GetProfilesResponse->Profiles->token);}}else{printf("Profiles Get inner Error\n");}}printf("Profiles Get Procedure over\n");}

soap 的http消息通信。參考代码：

void UserGetUri(struct soap *soap,struct _trt__GetStreamUri *trt__GetStreamUri,struct _trt__GetStreamUriResponse *trt__GetStreamUriResponse,struct _trt__GetProfilesResponse *trt__GetProfilesResponse,struct _tds__GetCapabilitiesResponse *capa_resp)
{int result=0 ;trt__GetStreamUri->StreamSetup = (struct tt__StreamSetup*)soap_malloc(soap,sizeof(struct tt__StreamSetup));//初始化，分配空间trt__GetStreamUri->StreamSetup->Stream = 0;//stream typetrt__GetStreamUri->StreamSetup->Transport = (struct tt__Transport *)soap_malloc(soap, sizeof(struct tt__Transport));//初始化，分配空间trt__GetStreamUri->StreamSetup->Transport->Protocol = 0;trt__GetStreamUri->StreamSetup->Transport->Tunnel = 0;trt__GetStreamUri->StreamSetup->__size = 1;trt__GetStreamUri->StreamSetup->__any = NULL;trt__GetStreamUri->StreamSetup->__anyAttribute =NULL;trt__GetStreamUri->ProfileToken = trt__GetProfilesResponse->Profiles->token ;printf("\n\n---------------Getting Uri----------------\n\n");soap_wsse_add_UsernameTokenDigest(soap,"user", ONVIF_USER, ONVIF_PASSWORD);soap_call___trt__GetStreamUri(soap, capa_resp->Capabilities->Media->XAddr, NULL, trt__GetStreamUri, trt__GetStreamUriResponse);if (soap->error) {printf("soap error: %d, %s, %s\n", soap->error, *soap_faultcode(soap), *soap_faultstring(soap));result = soap->error;}else{printf("!!!!NOTE: RTSP Addr Get Done is :%s \n",trt__GetStreamUriResponse->MediaUri->Uri);}
}

最后贴一个终端截图：

下面命名空间表示SOAP1.1版本号：{"SOAP-ENV", "http://schemas.xmlsoap.org/soap/envelope/", "http://www.w3.org/*/soap-envelope", NULL},{"SOAP-ENC", "http://schemas.xmlsoap.org/soap/encoding/", "http://www.w3.org/*/soap-encoding", NULL}, //1.1下面命名空间表示SOAP1.2版本号：{"SOAP-ENV", "http://www.w3.org/2003/05/soap-envelope", "http://schemas.xmlsoap.org/soap/envelope/", NULL},{"SOAP-ENC", "http://www.w3.org/2003/05/soap-encoding", "http://schemas.xmlsoap.org/soap/encoding/", NULL},  //1.2