onvif规范的实现:server端Discovery实现,通过OnvifTestTool12.06测试

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说明:网上关于ONVIF开发的文章并不多,也更找不到具体的实例来入门学习。只能靠翻阅各种Specification摸索中前进,下面是最近几天的成果。调通了服务端(或者说设备端)的Discovery,使用OnvifTestTool12.06能够搜到我的设备。【来自http://blog.csdn.net/ghostyu】

1、在使用wsdl2h产生头文件前需要修改typemap.dat,

修改的依据在这里:http://www.cs.fsu.edu/~engelen/soap.html,在FAQ页面下的How do I use gSOAP for the ONVIF specifications?

#Use gSOAP 2.8.10 and up. In the typemap.dat file used by wsdl2h, add:#ONVIF recommended prefixestds= "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 prefixeswsnt= "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 remappingwsdd10__HelloType= | wsdd__HelloTypewsdd10__ByeType= | wsdd__ByeTypewsdd10__ProbeType= | wsdd__ProbeTypewsdd10__ProbeMatchesType= | wsdd__ProbeMatchesTypewsdd10__ProbeMatchType= | wsdd__ProbeMatchTypewsdd10__ResolveType= | wsdd__ResolveTypewsdd10__ResolveMatchesType= | wsdd__ResolveMatchesTypewsdd10__ResolveMatchType= | wsdd__ResolveMatchType#SOAP-ENV mappingSOAP_ENV__Envelope= struct SOAP_ENV__Envelope { struct SOAP_ENV__Header *SOAP_ENV__Header; _XML SOAP_ENV__Body; }; | struct SOAP_ENV__EnvelopeSOAP_ENV__Header= | struct SOAP_ENV__HeaderSOAP_ENV__Fault= | struct SOAP_ENV__FaultSOAP_ENV__Detail= | struct SOAP_ENV__DetailSOAP_ENV__Code= | struct SOAP_ENV__CodeSOAP_ENV__Subcode= | struct SOAP_ENV__SubcodeSOAP_ENV__Reason= | struct SOAP_ENV__Reason

2、根据onvif官网提供的remotediscovery.wsdl产生onvif.h头文件

关于onvif所有的wsdl都在这里:http://www.onvif.org/Documents/Specifications.aspx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,所以最好直接使用url来产生头文件,不要下载下来。

wsdl2h -o onvif.h -c -s -t ./typemap.dat http://www.onvif.org/onvif/ver10/network/wsdl/remotediscovery.wsdl

3、使用onvif.h来产生骨架代码

soapcpp2 -c onvif.h -x -I /root/onvif/gsoap-2.8/gsoap/import -I /root/onvif/gsoap-2.8/gsoap/

4、ProbeMatches代码

这样就创建了基本的服务端和客户端的代码了,下面需要添加具体的代码了。

其中包括:

(1)创建组播用的udp socket,绑定组播地址为239.255.255.250,端口为3702,因为ws-discovery的组播地址和端口就是为239.255.255.250和3702

(2)在产生的Probe函数中添加ProbeMatches代码
首先是udp socket

int bind_server_udp1(int server_s){struct sockaddr_in local_addr;memset(&local_addr,0,sizeof(local_addr));local_addr.sin_family = AF_INET;local_addr.sin_addr.s_addr = htonl(INADDR_ANY);local_addr.sin_port = htons(3702);return bind(server_s,(struct sockaddr*)&local_addr,sizeof(local_addr));}static int create_server_socket_udp(void){    int server_udp;unsigned char one = 1;int sock_opt = 1;//server_udp = socket(PF_INET, SOCK_DGRAM, 0);    server_udp = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);    if (server_udp == -1) {        printf("unable to create socket\n");    }    /* reuse socket addr */    if ((setsockopt(server_udp, SOL_SOCKET, SO_REUSEADDR, (void *) &sock_opt,                    sizeof (sock_opt))) == -1) {        printf("setsockopt\n");    }    if ((setsockopt(server_udp, IPPROTO_IP, IP_MULTICAST_LOOP,                       &one, sizeof (unsigned char))) == -1) {        printf("setsockopt\n");    }struct ip_mreq mreq;mreq.imr_multiaddr.s_addr = inet_addr("239.255.255.250");mreq.imr_interface.s_addr = htonl(INADDR_ANY);if(setsockopt(server_udp,IPPROTO_IP,IP_ADD_MEMBERSHIP,&mreq,sizeof(mreq))==-1){perror("memberchip error\n");}    return server_udp;}
需要注意几点:1/设置socket属性SO_REUSEADDR,2、设置socket属性IP_ADD_MEMBERSHIP,目的是让3702的端口能够重复绑定,一家加入组播组。

其次是添加ProbeMatches代码
(1)首先复制client的soap_send___wsdd__ProbeMatches函数到服务端来,因为soap_send___wsdd__ProbeMatches已经写好了用于响应Probe消息的框架了,不用白不用啊。
(2)编写__wsdd__Probe函数,添加如下内容

int  __wsdd__Probe(struct soap* soap, struct wsdd__ProbeType *wsdd__Probe){DBG("__wsdd__Probe\n");char macaddr[6];char _IPAddr[INFO_LENGTH];char _HwId[1024];wsdd__ProbeMatchesType ProbeMatches;ProbeMatches.ProbeMatch = (struct wsdd__ProbeMatchType *)soap_malloc(soap, sizeof(struct wsdd__ProbeMatchType));ProbeMatches.ProbeMatch->XAddrs = (char *)soap_malloc(soap, sizeof(char) * INFO_LENGTH);ProbeMatches.ProbeMatch->Types = (char *)soap_malloc(soap, sizeof(char) * INFO_LENGTH);ProbeMatches.ProbeMatch->Scopes = (struct wsdd__ScopesType*)soap_malloc(soap,sizeof(struct wsdd__ScopesType));ProbeMatches.ProbeMatch->wsa__EndpointReference.ReferenceProperties = (struct wsa__ReferencePropertiesType*)soap_malloc(soap,sizeof(struct wsa__ReferencePropertiesType));ProbeMatches.ProbeMatch->wsa__EndpointReference.ReferenceParameters = (struct wsa__ReferenceParametersType*)soap_malloc(soap,sizeof(struct wsa__ReferenceParametersType));ProbeMatches.ProbeMatch->wsa__EndpointReference.ServiceName = (struct wsa__ServiceNameType*)soap_malloc(soap,sizeof(struct wsa__ServiceNameType));ProbeMatches.ProbeMatch->wsa__EndpointReference.PortType = (char **)soap_malloc(soap, sizeof(char *) * SMALL_INFO_LENGTH);ProbeMatches.ProbeMatch->wsa__EndpointReference.__any = (char **)soap_malloc(soap, sizeof(char*) * SMALL_INFO_LENGTH);ProbeMatches.ProbeMatch->wsa__EndpointReference.__anyAttribute = (char *)soap_malloc(soap, sizeof(char) * SMALL_INFO_LENGTH);ProbeMatches.ProbeMatch->wsa__EndpointReference.Address = (char *)soap_malloc(soap, sizeof(char) * INFO_LENGTH);macaddr[0]=0x01;macaddr[1]=0x01;macaddr[2]=0x01;macaddr[3]=0x01;macaddr[4]=0x01;macaddr[5]=0x01;sprintf(_HwId,"urn:uuid:2419d68a-2dd2-21b2-a205-%02X%02X%02X%02X%02X%02X",macaddr[0], macaddr[1], macaddr[2], macaddr[3], macaddr[4], macaddr[5]);sprintf(_IPAddr, "http://%03d.%03d.%1d.%03d/onvif/device_service", 192, 168, 1, 233);ProbeMatches.__sizeProbeMatch = 1;ProbeMatches.ProbeMatch->Scopes->__item =(char *)soap_malloc(soap, 1024);memset(ProbeMatches.ProbeMatch->Scopes->__item,0,sizeof(ProbeMatches.ProbeMatch->Scopes->__item));//Scopes MUST BEstrcat(ProbeMatches.ProbeMatch->Scopes->__item, "onvif://www.onvif.org/type/NetworkVideoTransmitter");ProbeMatches.ProbeMatch->Scopes->MatchBy = NULL;strcpy(ProbeMatches.ProbeMatch->XAddrs, _IPAddr);strcpy(ProbeMatches.ProbeMatch->Types, wsdd__Probe->Types);DBG("wsdd__Probe->Types=%s\n",wsdd__Probe->Types);ProbeMatches.ProbeMatch->MetadataVersion = 1;//ws-discovery规定 为可选项ProbeMatches.ProbeMatch->wsa__EndpointReference.ReferenceProperties->__size = 0;ProbeMatches.ProbeMatch->wsa__EndpointReference.ReferenceProperties->__any = NULL;ProbeMatches.ProbeMatch->wsa__EndpointReference.ReferenceParameters->__size = 0;ProbeMatches.ProbeMatch->wsa__EndpointReference.ReferenceParameters->__any = NULL;ProbeMatches.ProbeMatch->wsa__EndpointReference.PortType[0] = (char *)soap_malloc(soap, sizeof(char) * SMALL_INFO_LENGTH);//ws-discovery规定 为可选项strcpy(ProbeMatches.ProbeMatch->wsa__EndpointReference.PortType[0], "ttl");ProbeMatches.ProbeMatch->wsa__EndpointReference.ServiceName->__item = NULL;ProbeMatches.ProbeMatch->wsa__EndpointReference.ServiceName->PortName = NULL;ProbeMatches.ProbeMatch->wsa__EndpointReference.ServiceName->__anyAttribute = NULL;ProbeMatches.ProbeMatch->wsa__EndpointReference.__any[0] = (char *)soap_malloc(soap, sizeof(char) * SMALL_INFO_LENGTH);strcpy(ProbeMatches.ProbeMatch->wsa__EndpointReference.__any[0], "Any");strcpy(ProbeMatches.ProbeMatch->wsa__EndpointReference.__anyAttribute, "Attribute");ProbeMatches.ProbeMatch->wsa__EndpointReference.__size = 0;strcpy(ProbeMatches.ProbeMatch->wsa__EndpointReference.Address, _HwId);/*注释的部分为可选,注释掉onvif test也能发现ws-d*///soap->header->wsa__To = "http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous";//soap->header->wsa__Action = "http://schemas.xmlsoap.org/ws/2005/04/discovery/ProbeMatches";soap->header->wsa__RelatesTo = (struct wsa__Relationship*)soap_malloc(soap, sizeof(struct wsa__Relationship));//it's heresoap->header->wsa__RelatesTo->__item = soap->header->wsa__MessageID;soap->header->wsa__RelatesTo->RelationshipType = NULL;soap->header->wsa__RelatesTo->__anyAttribute = NULL;soap->header->wsa__MessageID =(char *)soap_malloc(soap, sizeof(char) * INFO_LENGTH);strcpy(soap->header->wsa__MessageID,_HwId+4);    /* send over current socket as HTTP OK response: *//*测试过,第二参数必须http,action随意*/    soap_send___wsdd__ProbeMatches(soap, "http://", NULL, &ProbeMatches);return SOAP_OK;}
想要写出上述代码,是一定要了解SOAP格式的,在WS-Discovery中描述了discovery所用的soap格式

1首先是了解消息头header和ProbeMatches中的内容,非常重要,可以参考这里http://www.w3.org/Submission/ws-addressing/  最好详细的学习一下,里面的内容非常重要。

2其次需要理解的是,其实当你看完ws-addressing后你会发现,骨架代码中的结构体和SOAP消息中的内容是一一对应的,例如:

结构体osap->header对应SOAP消息的<SOAP-ENV:Header></SOAP-ENV:Header>中的内容,包含在header里的内容当然会包含在SOAP的header内。例如:

结构体soap->header->wsa__RelatesTo对应的是<wsa:RelatesTo></wsa:RelatesTo>。

3最后需要理解的是,在代码中的"__"双下划线一般对应xml中的命名空间的":",下划线前是命名空间,后是具体内容。

4最后的最后是要详细的阅读ONVIF Core Specification

下图为响应OnvifTestTool的Probe命令的SOAP消息


结合上图再分析代码就亲切多了。在ONVIF Core Specification的7.3.2.2  Scopes 一节描述了onvif需要的Scopes,这个是需要在程序里填充,具体填充什么,文档里说的很明确:


注意点是在太多,随便漏掉一个都可能会导致搜不到设备,下图是非常重要的一个:

SOAP1.1和SOAP1.2所使用的SOAP-ENV是不同的,ONVIF使用的是SOAP1.1,如果soapcpp2产生的nsmap文件中的SOAP-ENV是SOAP1.2版本的话,那么OnvifTestTool是不会识别设备发出的SOAP消息的。

5、该main函数登场了

int main(){int server_udp;int retval=0;struct soap *soap_udp;int fault_flag = 0;server_udp = create_server_socket_udp();bind_server_udp1(server_udp);while(1){soap_udp=soap_new();soap_init1(soap_udp, SOAP_IO_UDP);soap_udp->master = server_udp;soap_udp->socket = server_udp;soap_udp->errmode = 0;soap_udp->bind_flags = 1;if (!soap_valid_socket(soap_bind(soap_udp, NULL, 3702, 100))){ soap_print_fault(soap_udp, stderr);}fprintf(stderr,"soap_serve starting..\n");retval = soap_serve(soap_udp); //阻塞在这里fprintf(stderr,"retval=%d\n",retval);if(retval && !(fault_flag)){fault_flag = 1;}else if(!retval){fault_flag = 0;}soap_destroy(soap_udp);soap_end(soap_udp);soap_done(soap_udp);free(soap_udp);}}
soap_server函数会一直阻塞,直到接收到SOAP消息,并且该处理是一次性的,所以要将将soap_server放到while里或者独立的线程中。
最后编译运行

make server

./discovery.tmp

单击OnvifTestTool的Discover Devices,运行discovery.tmp的中会打印调试信息,如图


然后,在OnvifTestTool中会搜索到我的设备


响应Discover Devices的SOAP消息如下:

<?xml version="1.0" encoding="UTF-8"?><SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" xmlns:SOAP-ENC="http://www.w3.org/2003/05/soap-encoding" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:wsdd="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:ns1="http://www.onvif.org/ver10/network/wsdl/RemoteDiscoveryBinding" xmlns:ns2="http://www.onvif.org/ver10/network/wsdl/DiscoveryLookupBinding" xmlns:ns3="http://www.onvif.org/ver10/network/wsdl/DiscoveryLookupBinding" xmlns:tdn="http://www.onvif.org/ver10/network/wsdl"><SOAP-ENV:Header><wsa:MessageID>uuid:2419d68a-2dd2-21b2-a205-010101010101</wsa:MessageID><wsa:RelatesTo>uuid:88a3958a-6155-4510-8279-69aeafd31681</wsa:RelatesTo><wsa:To SOAP-ENV:mustUnderstand="true">urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsa:To><wsa:Action SOAP-ENV:mustUnderstand="true">http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe</wsa:Action></SOAP-ENV:Header><SOAP-ENV:Body><wsdd:ProbeMatches><wsdd:ProbeMatch xmlns:_0="http://www.onvif.org/ver10/device/wsdl"><wsa:EndpointReference><wsa:Address>urn:uuid:2419d68a-2dd2-21b2-a205-010101010101</wsa:Address><wsa:ReferenceProperties></wsa:ReferenceProperties><wsa:ReferenceParameters></wsa:ReferenceParameters><wsa:PortType>ttl</wsa:PortType></wsa:EndpointReference><wsdd:Types>_0:Device</wsdd:Types><wsdd:Scopes>onvif://www.onvif.org/type/NetworkVideoTransmitter</wsdd:Scopes><wsdd:XAddrs>http://192.168.1.233/onvif/device_service</wsdd:XAddrs><wsdd:MetadataVersion>1</wsdd:MetadataVersion></wsdd:ProbeMatch></wsdd:ProbeMatches></SOAP-ENV:Body></SOAP-ENV:Envelope>

资料下载

上述完整的代码包在这里,有需要的就去下载吧:http://download.csdn.net/detail/ghostyu/4766025

另外我参考的部分文档可以再这里下载

ONVIF-Core-Spec-v210.pdf:http://download.csdn.net/detail/ghostyu/4766067

gSOAP手册:http://download.csdn.net/detail/ghostyu/4766075

OnvifTestTool12.06测试工具网上有的,我就不上传了。