winpcap/Examples-pcap/iflist/iflist.c

   1 /*
   2  * Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy)
   3  * Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  * notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  * notice, this list of conditions and the following disclaimer in the
  14  * documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the Politecnico di Torino, CACE Technologies
  16  * nor the names of its contributors may be used to endorse or promote
  17  * products derived from this software without specific prior written
  18  * permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  */
  33
  34
  35 #include "pcap.h"
  36
  37 #ifndef WIN32
  38         #include <sys/socket.h>
  39         #include <netinet/in.h>
  40 #else
  41         #include <winsock.h>
  42 #endif
  43
  44
  45 // Function prototypes
  46 void ifprint(pcap_if_t *d);
  47 char *iptos(u_long in);
  48 char* ip6tos(struct sockaddr *sockaddr, char *address, int addrlen);
  49
  50
  51 int main()
  52 {
  53         pcap_if_t *alldevs;
  54         pcap_if_t *d;
  55         char errbuf[PCAP_ERRBUF_SIZE+1];
  56
  57         /* Retrieve the device list */
  58         if(pcap_findalldevs(&alldevs, errbuf) == -1)
  59         {
  60                 fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf);
  61                 exit(1);
  62         }
  63
  64         /* Scan the list printing every entry */
  65         for(d=alldevs;d;d=d->next)
  66         {
  67                 ifprint(d);
  68         }
  69
  70         /* Free the device list */
  71         pcap_freealldevs(alldevs);
  72
  73         return 1;
  74 }
  75
  76
  77
  78 /* Print all the available information on the given interface */
  79 void ifprint(pcap_if_t *d)
  80 {
  81   pcap_addr_t *a;
  82   char ip6str[128];
  83
  84   /* Name */
  85   printf("%s\n",d->name);
  86
  87   /* Description */
  88   if (d->description)
  89     printf("\tDescription: %s\n",d->description);
  90
  91   /* Loopback Address*/
  92   printf("\tLoopback: %s\n",(d->flags & PCAP_IF_LOOPBACK)?"yes":"no");
  93
  94   /* IP addresses */
  95   for(a=d->addresses;a;a=a->next) {
  96     printf("\tAddress Family: #%d\n",a->addr->sa_family);
  97
  98     switch(a->addr->sa_family)
  99     {
 100       case AF_INET:
 101         printf("\tAddress Family Name: AF_INET\n");
 102         if (a->addr)
 103           printf("\tAddress: %s\n",iptos(((struct sockaddr_in *)a->addr)->sin_addr.s_addr));
 104         if (a->netmask)
 105           printf("\tNetmask: %s\n",iptos(((struct sockaddr_in *)a->netmask)->sin_addr.s_addr));
 106         if (a->broadaddr)
 107           printf("\tBroadcast Address: %s\n",iptos(((struct sockaddr_in *)a->broadaddr)->sin_addr.s_addr));
 108         if (a->dstaddr)
 109           printf("\tDestination Address: %s\n",iptos(((struct sockaddr_in *)a->dstaddr)->sin_addr.s_addr));
 110         break;
 111
 112           case AF_INET6:
 113        printf("\tAddress Family Name: AF_INET6\n");
 114 #ifndef __MINGW32__ /* Cygnus doesn't have IPv6 */
 115         if (a->addr)
 116           printf("\tAddress: %s\n", ip6tos(a->addr, ip6str, sizeof(ip6str)));
 117 #endif
 118                 break;
 119
 120           default:
 121         printf("\tAddress Family Name: Unknown\n");
 122         break;
 123     }
 124   }
 125   printf("\n");
 126 }
 127
 128 /* From tcptraceroute, convert a numeric IP address to a string */
 129 #define IPTOSBUFFERS    12
 130 char *iptos(u_long in)
 131 {
 132         static char output[IPTOSBUFFERS][3*4+3+1];
 133         static short which;
 134         u_char *p;
 135
 136         p = (u_char *)&in;
 137         which = (which + 1 == IPTOSBUFFERS ? 0 : which + 1);
 138         sprintf(output[which], "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
 139         return output[which];
 140 }
 141
 142 #ifndef __MINGW32__ /* Cygnus doesn't have IPv6 */
 143 char* ip6tos(struct sockaddr *sockaddr, char *address, int addrlen)
 144 {
 145         socklen_t sockaddrlen;
 146
 147         #ifdef WIN32
 148         sockaddrlen = sizeof(struct sockaddr_in6);
 149         #else
 150         sockaddrlen = sizeof(struct sockaddr_storage);
 151         #endif
 152
 153
 154         if(getnameinfo(sockaddr,
 155                 sockaddrlen,
 156                 address,
 157                 addrlen,
 158                 NULL,
 159                 0,
 160                 NI_NUMERICHOST) != 0) address = NULL;
 161
 162         return address;
 163 }
 164 #endif /* __MINGW32__ */
 165