winPcap_4_获取已安装设备的高级信息

 

由 pcap_findalldevs_ex() 返回的每一个 pcap_if 结构体，都包含一个 pcap_addr 结构体，这个结构体由如下元素组成：

• 一个地址列表
• 一个掩码列表 (each of which corresponds to an entry in the addresses list).
• 一个广播地址列表 (each of which corresponds to an entry in the addresses list).
• 一个目的地址列表 (each of which corresponds to an entry in the addresses list).

另外，函数 pcap_findalldevs_ex() 还能 返回远程适配器信息 和 一个位于所给的本地文件夹的pcap文件列表。

下面的范例使用了ifprint()函数来打印出 pcap_if 结构体中所有的内容。程序对每一个由 pcap_findalldevs_ex() 函数返回的pcap_if，都调用ifprint()函数来实现打印。

 

  1 #include "pcap.h"

  2 #pragma comment(lib, "wpcap.lib")

  3 #pragma comment(lib, "Packet.lib")

  4 #pragma comment(lib, "wsock32.lib")

  5 

  6 

  7 

  8 #ifndef WIN32

  9     #include <sys/socket.h>

 10     #include <netinet/in.h>

 11 #else

 12     #include <winsock.h>

 13 #endif

 14 

 15 

 16 // 函数原型

 17 void ifprint(pcap_if_t *d);

 18 char *iptos(u_long in);

 19 char* ip6tos(struct sockaddr *sockaddr, char *address, int addrlen);

 20 

 21 

 22 int main()

 23 {

 24   pcap_if_t *alldevs;

 25   pcap_if_t *d;

 26   char errbuf[PCAP_ERRBUF_SIZE+1];

 27   char source[PCAP_ERRBUF_SIZE+1];

 28 

 29   printf("Enter the device you want to list:\n"

 30             "rpcap://              ==> lists interfaces in the local machine\n"

 31             "rpcap://hostname:port ==> lists interfaces in a remote machine\n"

 32             "                          (rpcapd daemon must be up and running\n"

 33             "                           and it must accept 'null' authentication)\n"

 34             "file://foldername     ==> lists all pcap files in the give folder\n\n"

 35             "Enter your choice: ");

 36 

 37   fgets(source, PCAP_ERRBUF_SIZE, stdin);

 38   source[PCAP_ERRBUF_SIZE] = '\0';

 39 

 40   /* 获得接口列表 */

 41   if (pcap_findalldevs_ex(source, NULL, &alldevs, errbuf) == -1)

 42   {

 43     fprintf(stderr,"Error in pcap_findalldevs: %s\n",errbuf);

 44     exit(1);

 45   }

 46 

 47   /* 扫描列表并打印每一项 */

 48   for(d=alldevs;d;d=d->next)

 49   {

 50     ifprint(d);

 51   }

 52 

 53   pcap_freealldevs(alldevs);

 54 

 55   return 1;

 56 }

 57 

 58 

 59 

 60 /* 打印所有可用信息 */

 61 void ifprint(pcap_if_t *d)

 62 {

 63   pcap_addr_t *a;

 64   char ip6str[128];

 65 

 66   /* 设备名(Name) */

 67   printf("%s\n",d->name);

 68 

 69   /* 设备描述(Description) */

 70   if (d->description)

 71     printf("\tDescription: %s\n",d->description);

 72 

 73   /* Loopback Address*/

 74   printf("\tLoopback: %s\n",(d->flags & PCAP_IF_LOOPBACK)?"yes":"no");

 75 

 76   /* IP addresses */

 77   for(a=d->addresses;a;a=a->next) {

 78     printf("\tAddress Family: #%d\n",a->addr->sa_family);

 79   

 80     switch(a->addr->sa_family)

 81     {

 82       case AF_INET:

 83         printf("\tAddress Family Name: AF_INET\n");

 84         if (a->addr)

 85           printf("\tAddress: %s\n",iptos(((struct sockaddr_in *)a->addr)->sin_addr.s_addr));

 86         if (a->netmask)

 87           printf("\tNetmask: %s\n",iptos(((struct sockaddr_in *)a->netmask)->sin_addr.s_addr));

 88         if (a->broadaddr)

 89           printf("\tBroadcast Address: %s\n",iptos(((struct sockaddr_in *)a->broadaddr)->sin_addr.s_addr));

 90         if (a->dstaddr)

 91           printf("\tDestination Address: %s\n",iptos(((struct sockaddr_in *)a->dstaddr)->sin_addr.s_addr));

 92         break;

 93 /*

 94       case AF_INET6:

 95         printf("\tAddress Family Name: AF_INET6\n");

 96         if (a->addr)

 97           printf("\tAddress: %s\n", ip6tos(a->addr, ip6str, sizeof(ip6str)));

 98        break;

 99 */

100       default:

101         printf("\tAddress Family Name: Unknown\n");

102         break;

103     }

104   }

105   printf("\n");

106 }

107 

108 

109 

110 /* 将数字类型的IP地址转换成字符串类型的 */

111 #define IPTOSBUFFERS    12

112 char *iptos(u_long in)

113 {

114     static char output[IPTOSBUFFERS][3*4+3+1];

115     static short which;

116     u_char *p;

117 

118     p = (u_char *)&in;

119     which = (which + 1 == IPTOSBUFFERS ? 0 : which + 1);

120     sprintf(output[which], "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);

121     return output[which];

122 }

123 

124 

125 /*

126 char* ip6tos(struct sockaddr *sockaddr, char *address, int addrlen)

127 {

128     socklen_t sockaddrlen;

129 

130     #ifdef WIN32

131     sockaddrlen = sizeof(struct sockaddr_in6);

132     #else

133     sockaddrlen = sizeof(struct sockaddr_storage);

134     #endif

135 

136 

137     if(getnameinfo(sockaddr, 

138         sockaddrlen, 

139         address, 

140         addrlen, 

141         NULL, 

142         0, 

143         NI_NUMERICHOST) != 0) address = NULL;

144 

145     return address;

146 }

147 */

获取已安装设备的高级信息.c

 

　　结果：

 

此处只能显示电脑的ipv4的网卡信息，不知道为什么不能有ipv6的代码时，不能编译通过，不知道是包不支持，还是系统不支持；

 

 

int pcap_findalldevs_ex  ( char *  source,  

  struct pcap_rmtauth *  auth,  

  pcap_if_t **  alldevs,  

  char *  errbuf   

 ) 

 

　　·该函数请查看前一篇；

 

struct pcap_rmtauth{

　　int    type

     //Type of the authentication required.

　　char *    username

     //Zero-terminated string containing the username that has to be used on the remote machine for authentication.

　　char *    password

     //Zero-terminated string containing the password that has to be used on the remote machine for authentication. 

};

 

 

typedef struct pcap_if pcap_if_t;

struct  pcap_if {

    pcap_if *    next

    //if not NULL, a pointer to the next element in the list; NULL for the last element of the list

    char *    name

    //a pointer to a string giving a name for the device to pass to pcap_open_live()

    char *    description

    //if not NULL, a pointer to a string giving a human-readable description of the device

    pcap_addr *    addresses

    //a pointer to the first element of a list of addresses for the interface

    u_int    flags

    //PCAP_IF_ interface flags. Currently the only possible flag is PCAP_IF_LOOPBACK, that is set if the interface is a loopback interface.

};

 

typedef struct pcap_addr pcap_addr_t;

struct  pcap_addr

{

    pcap_addr *    next

    //if not NULL, a pointer to the next element in the list; NULL for the last element of the list

    sockaddr *    addr

    //a pointer to a struct sockaddr containing an address

    sockaddr *    netmask

    //if not NULL, a pointer to a struct sockaddr that contains the netmask corresponding to the address pointed to by addr.

    sockaddr *    broadaddr

    //if not NULL, a pointer to a struct sockaddr that contains the broadcast address corre­ sponding to the address pointed to by addr; may be null if the interface doesn't support broadcasts

    sockaddr *    dstaddr

    //if not NULL, a pointer to a struct sockaddr that contains the destination address corre­ sponding to the address pointed to by addr; may be null if the interface isn't a point- to-point interface

};

 

struct sockaddr {

    unsigned short sa_family;

    char           sa_data[14];

};

 

 　　·详细的请看前面的socket编程；

 

struct sockaddr_in{

    short                 sin_family;

    unsigned short        sin_port;

    struct   in_addr      sin_addr;

    char                  sin_zero[8];

};

 

 

in_addr

The in_addr structure represents a host by its Internet address.

struct in_addr {

  union {

          struct { u_char s_b1,s_b2,s_b3,s_b4; }   S_un_b;

          struct { u_short s_w1,s_w2; }            S_un_w;

          u_long                                   S_addr;

  } S_un;

};

Members

S_un_b

Address of the host formatted as four u_chars.

S_un_w

Address of the host formatted as two u_shorts.

S_addr

Address of the host formatted as a u_long. 

 

 

fgets, fgetws

Get a string from a stream.

char *fgets( char *string, int n, FILE *stream );



wchar_t *fgetws( wchar_t *string, int n, FILE *stream );