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

2 #include

3 #include

4 #include

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 = null\n", __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, '\0', 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, '\0', 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 etauth\n");

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[] = "http://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, %s\n", 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