一、要准备的文件：
1.ONVIF相关的WSDL文件，对于设备发现，只需要用到RemoteDiscovery.wsdl一个即可，
2.gSoap的压缩包，找到/gsoap/bin/win32文件夹中的soapcpp2.exe以及wsdl2h.exe，以及在/gSoap目录下的typemap.dat文件,将这些文件放到一个文件夹下。
二、对typemap.bat进行修改，
tds = "http://www.onvif.org/ver10/device/wsdl"
tev = "http://www.onvif.org/ver10/events/wsdl"
tls = "http://www.onvif.org/ver10/display/wsdl"
tmd = "http://www.onvif.org/ver10/deviceIO/wsdl"
timg = "http://www.onvif.org/ver20/imaging/wsdl"
trt = "http://www.onvif.org/ver10/media/wsdl"
tptz = "http://www.onvif.org/ver20/ptz/wsdl"
trv = "http://www.onvif.org/ver10/receiver/wsdl"
trc = "http://www.onvif.org/ver10/recording/wsdl"
tse = "http://www.onvif.org/ver10/search/wsdl"
trp = "http://www.onvif.org/ver10/replay/wsdl"
tan = "http://www.onvif.org/ver20/analytics/wsdl"
tad = "http://www.onvif.org/ver10/analyticsdevice/wsdl"
tdn = "http://www.onvif.org/ver10/network/wsdl"
tt = "http://www.onvif.org/ver10/schema"
# OASIS recommended prefixes
wsnt = "http://docs.oasis-open.org/wsn/b-2"
wsntw = "http://docs.oasis-open.org/wsn/bw-2"
wsrfbf = "http://docs.oasis-open.org/wsrf/bf-2"
wsrfr = "http://docs.oasis-open.org/wsrf/r-2"
wsrfrw = "http://docs.oasis-open.org/wsrf/rw-2"
wstop = "http://docs.oasis-open.org/wsn/t-1"
# WS-Discovery 1.0 remapping
wsdd10__HelloType = | wsdd__HelloType
wsdd10__ByeType = | wsdd__ByeType
wsdd10__ProbeType = | wsdd__ProbeType
wsdd10__ProbeMatchesType = | wsdd__ProbeMatchesType
wsdd10__ProbeMatchType = | wsdd__ProbeMatchType
wsdd10__ResolveType = | wsdd__ResolveType
wsdd10__ResolveMatchesType = | wsdd__ResolveMatchesType
wsdd10__ResolveMatchType = | wsdd__ResolveMatchType
# SOAP-ENV mapping
SOAP_ENV__Envelope = struct SOAP_ENV__Envelope { struct SOAP_ENV__Header *SOAP_ENV__Header; _XML SOAP_ENV__Body; }; | struct SOAP_ENV__Envelope
SOAP_ENV__Header = | struct SOAP_ENV__Header
SOAP_ENV__Fault = | struct SOAP_ENV__Fault
SOAP_ENV__Detail = | struct SOAP_ENV__Detail
SOAP_ENV__Code = | struct SOAP_ENV__Code
SOAP_ENV__Subcode = | struct SOAP_ENV__Subcode
SOAP_ENV__Reason = | struct SOAP_ENV__Reason其中加色部分是添加的内容，用于对内容加上ONVIF的相关前缀，在通过soapcpp2.exe生成相关源文件之后，查看源代码可发现在代码上对这些改动的体现。
三、根据RemoteDiscovery.wsdl的到onvif.h文件
ONVIF官方文档，主要包含了函数的描述，SOAP Action，函数输入、输出接口等
Wsdl的资料在Onvif官方Wsdl文档中的ONVIF WSDL and XML Schemas Specifications一节，虽然可以全部下载为wsdl文件，但是wsdl文件中存在相互依赖的关系，并且是带有存储的依赖，所以一般最好直接使用url来产生头文件，不要下载下来。
官方2.0文档: http://www.onvif.org/onvif/ver20/util/operationIndex.html 官方wsdl文档： http://www.onvif.org/Documents/Specifications.aspx
1.使用URL产生onvif.h：wsdl2h.exe -o onvif.h -c -s -t typemap.dat http://www.onvif.org/onvif/ver10/network/wsdl/remotediscovery.wsdl
2.使用本地文件产生onvif.h：wsdl2h.exe -o onvif.h -s -t typemap.dat remotediscovery.wsdl
其中-c为产生纯c代码，不然为c++代码；-s为不使用STL库，-t为typemap.dat的标识
四、根据onvif来产生相关源文件
soapcpp2.exe onvif.h -x -I E:\gsoap\import -I E:\gsoapsoapcpp2.exe -x onvif.h然后按照提示找到缺少的文件后添加到目录下。
五、完成main函数
#include <iostream>
#include "wsdd.nsmap"
#include "soapH.h"
using namespace std;
int main()
{
struct soap *soap;
struct wsdd__ProbeType req;
struct __wsdd__ProbeMatches resp;
struct wsdd__ScopesType sScope;
struct SOAP_ENV__Header header;
int count = 0;
int result = 0;
char guid_string[100];
soap = soap_new();
if(soap==NULL)
{
return -1;
}
soap_set_namespaces(soap, namespaces);
soap->recv_timeout = 5; //超过5秒钟没有数据就退出
soap_default_SOAP_ENV__Header(soap, &header);
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 = "";
result = soap_send___wsdd__Probe(soap, "soap.udp://239.255.255.250:3702", NULL, &req);
do{
result = soap_recv___wsdd__ProbeMatches(soap, &resp);
if (soap->error)
{
cout<<"soap error:"<<soap->error<<soap_faultcode(soap)<<"---"<<soap_faultstring(soap)<<endl;
result = soap->error;
break;
}
else
{
cout<<"========================================="<<endl;
cout<<"Match size:"<<resp.wsdd__ProbeMatches->__sizeProbeMatch<<endl;
cout<<"xsd-unsignedInt:"<<resp.wsdd__ProbeMatches->ProbeMatch->MetadataVersion<<endl;
cout<<"scopes item:"<<resp.wsdd__ProbeMatches->ProbeMatch->Scopes->__item<<endl;
//cout<<"scopes matchby:"<<resp.wsdd__ProbeMatches->ProbeMatch->Scopes->MatchBy<<endl;
cout<<"QName:"<<resp.wsdd__ProbeMatches->ProbeMatch->Types<<endl;
cout<<"xsd:string:"<<resp.wsdd__ProbeMatches->ProbeMatch->wsa__EndpointReference.Address<<endl;
cout<<"xsd:QName:"<<resp.wsdd__ProbeMatches->ProbeMatch->wsa__EndpointReference.PortType<<endl;
cout<<"wsa:ServiceNameType:"<<resp.wsdd__ProbeMatches->ProbeMatch->wsa__EndpointReference.ServiceName<<endl;
cout<<"sequence of elements:"<<resp.wsdd__ProbeMatches->ProbeMatch->wsa__EndpointReference.__size<<endl;
cout<<"xsd:anyType:"<<resp.wsdd__ProbeMatches->ProbeMatch->wsa__EndpointReference.__anyAttribute<<endl;
cout<<"endpoint any:"<<resp.wsdd__ProbeMatches->ProbeMatch->wsa__EndpointReference.__any<<endl;
cout<<"wsdd:UriListType:"<<resp.wsdd__ProbeMatches->ProbeMatch->XAddrs<<endl;
}
}while(1);
soap_destroy(soap); // remove deserialized class instances (C++ only)
soap_end(soap); // clean up and remove deserialized data
soap_done(soap);
return result;
} 六、结果
启动onvif的测试工具，点开Discovery，点击Discovery Device
来源：oschina
链接：https://my.oschina.net/u/347877/blog/119206