external/bsd/libpcap/dist/tests/findalldevstest.c

   1 /*      $NetBSD: findalldevstest.c,v 1.3 2015/03/31 21:39:43 christos Exp $     */
   2
   3 #include <sys/cdefs.h>
   4 __RCSID("$NetBSD: findalldevstest.c,v 1.3 2015/03/31 21:39:43 christos Exp $");
   5
   6 #ifdef HAVE_CONFIG_H
   7 #include "config.h"
   8 #endif
   9
  10 #include <stdlib.h>
  11 #include <sys/types.h>
  12 #include <sys/socket.h>
  13 #include <netinet/in.h>
  14 #include <arpa/inet.h>
  15 #include <netdb.h>
  16
  17 #include <pcap.h>
  18
  19 static int ifprint(pcap_if_t *d);
  20 static char *iptos(bpf_u_int32 in);
  21
  22 int main(int argc, char **argv)
  23 {
  24   pcap_if_t *alldevs;
  25   pcap_if_t *d;
  26   char *s;
  27   bpf_u_int32 net, mask;
  28   int exit_status = 0;
  29
  30   char errbuf[PCAP_ERRBUF_SIZE+1];
  31   if (pcap_findalldevs(&alldevs, errbuf) == -1)
  32   {
  33     fprintf(stderr,"Error in pcap_findalldevs: %s\n",errbuf);
  34     exit(1);
  35   }
  36   for(d=alldevs;d;d=d->next)
  37   {
  38     if (!ifprint(d))
  39       exit_status = 2;
  40   }
  41
  42   if ( (s = pcap_lookupdev(errbuf)) == NULL)
  43   {
  44     fprintf(stderr,"Error in pcap_lookupdev: %s\n",errbuf);
  45     exit_status = 2;
  46   }
  47   else
  48   {
  49     printf("Preferred device name: %s\n",s);
  50   }
  51
  52   if (pcap_lookupnet(s, &net, &mask, errbuf) < 0)
  53   {
  54     fprintf(stderr,"Error in pcap_lookupnet: %s\n",errbuf);
  55     exit_status = 2;
  56   }
  57   else
  58   {
  59     printf("Preferred device is on network: %s/%s\n",iptos(net), iptos(mask));
  60   }
  61
  62   exit(exit_status);
  63 }
  64
  65 static int ifprint(pcap_if_t *d)
  66 {
  67   pcap_addr_t *a;
  68 #ifdef INET6
  69   char ntop_buf[INET6_ADDRSTRLEN];
  70 #endif
  71   int status = 1; /* success */
  72
  73   printf("%s\n",d->name);
  74   if (d->description)
  75     printf("\tDescription: %s\n",d->description);
  76   printf("\tLoopback: %s\n",(d->flags & PCAP_IF_LOOPBACK)?"yes":"no");
  77
  78   for(a=d->addresses;a;a=a->next) {
  79     if (a->addr != NULL)
  80       switch(a->addr->sa_family) {
  81       case AF_INET:
  82         printf("\tAddress Family: AF_INET\n");
  83         if (a->addr)
  84           printf("\t\tAddress: %s\n",
  85             inet_ntoa(((struct sockaddr_in *)(a->addr))->sin_addr));
  86         if (a->netmask)
  87           printf("\t\tNetmask: %s\n",
  88             inet_ntoa(((struct sockaddr_in *)(a->netmask))->sin_addr));
  89         if (a->broadaddr)
  90           printf("\t\tBroadcast Address: %s\n",
  91             inet_ntoa(((struct sockaddr_in *)(a->broadaddr))->sin_addr));
  92         if (a->dstaddr)
  93           printf("\t\tDestination Address: %s\n",
  94             inet_ntoa(((struct sockaddr_in *)(a->dstaddr))->sin_addr));
  95         break;
  96 #ifdef INET6
  97       case AF_INET6:
  98         printf("\tAddress Family: AF_INET6\n");
  99         if (a->addr)
 100           printf("\t\tAddress: %s\n",
 101             inet_ntop(AF_INET6,
 102                ((struct sockaddr_in6 *)(a->addr))->sin6_addr.s6_addr,
 103                ntop_buf, sizeof ntop_buf));
 104         if (a->netmask)
 105           printf("\t\tNetmask: %s\n",
 106             inet_ntop(AF_INET6,
 107               ((struct sockaddr_in6 *)(a->netmask))->sin6_addr.s6_addr,
 108                ntop_buf, sizeof ntop_buf));
 109         if (a->broadaddr)
 110           printf("\t\tBroadcast Address: %s\n",
 111             inet_ntop(AF_INET6,
 112               ((struct sockaddr_in6 *)(a->broadaddr))->sin6_addr.s6_addr,
 113                ntop_buf, sizeof ntop_buf));
 114         if (a->dstaddr)
 115           printf("\t\tDestination Address: %s\n",
 116             inet_ntop(AF_INET6,
 117               ((struct sockaddr_in6 *)(a->dstaddr))->sin6_addr.s6_addr,
 118                ntop_buf, sizeof ntop_buf));
 119         break;
 120 #endif
 121       default:
 122         printf("\tAddress Family: Unknown (%d)\n", a->addr->sa_family);
 123         break;
 124       }
 125     else
 126     {
 127       fprintf(stderr, "\tWarning: a->addr is NULL, skipping this address.\n");
 128       status = 0;
 129     }
 130   }
 131   printf("\n");
 132   return status;
 133 }
 134
 135 /* From tcptraceroute */
 136 #define IPTOSBUFFERS    12
 137 static char *iptos(bpf_u_int32 in)
 138 {
 139         static char output[IPTOSBUFFERS][3*4+3+1];
 140         static short which;
 141         u_char *p;
 142
 143         p = (u_char *)&in;
 144         which = (which + 1 == IPTOSBUFFERS ? 0 : which + 1);
 145         sprintf(output[which], "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
 146         return output[which];
 147 }