libexec/bootpd/trygetif.c

   1 /*
   2  * trygetif.c - test program for getif.c
   3  *
   4  * $FreeBSD: src/libexec/bootpd/trygetif.c,v 1.5 1999/08/28 00:09:20 peter Exp $
   5  * $DragonFly: src/libexec/bootpd/trygetif.c,v 1.2 2003/06/17 04:27:07 dillon Exp $
   6  */
   7
   8 #include <sys/types.h>
   9 #include <sys/socket.h>
  10
  11 #if defined(SUNOS) || defined(SVR4)
  12 #include <sys/sockio.h>
  13 #endif
  14
  15 #ifdef _AIX32
  16 #include <sys/time.h>   /* for struct timeval in net/if.h */
  17 #endif
  18 #include <net/if.h>                             /* for struct ifreq */
  19 #include <netinet/in.h>
  20 #include <arpa/inet.h>                  /* inet_ntoa */
  21
  22 #include <netdb.h>
  23 #include <stdio.h>
  24 #include <ctype.h>
  25 #include <errno.h>
  26
  27 #include "getif.h"
  28
  29 int debug = 0;
  30 char *progname;
  31
  32 void
  33 main(argc, argv)
  34         int argc;
  35         char **argv;
  36 {
  37         struct hostent *hep;
  38         struct sockaddr_in *sip;        /* Interface address */
  39         struct ifreq *ifr;
  40         struct in_addr dst_addr;
  41         struct in_addr *dap;
  42         int s;
  43
  44         progname = argv[0];                     /* for report */
  45
  46         dap = NULL;
  47         if (argc > 1) {
  48                 dap = &dst_addr;
  49                 if (isdigit(argv[1][0]))
  50                         dst_addr.s_addr = inet_addr(argv[1]);
  51                 else {
  52                         hep = gethostbyname(argv[1]);
  53                         if (!hep) {
  54                                 printf("gethostbyname(%s)\n", argv[1]);
  55                                 exit(1);
  56                         }
  57                         memcpy(&dst_addr, hep->h_addr, sizeof(dst_addr));
  58                 }
  59         }
  60         s = socket(AF_INET, SOCK_DGRAM, 0);
  61         if (s < 0) {
  62                 perror("socket open");
  63                 exit(1);
  64         }
  65         ifr = getif(s, dap);
  66         if (!ifr) {
  67                 printf("no interface for address\n");
  68                 exit(1);
  69         }
  70         printf("Intf-name:%s\n", ifr->ifr_name);
  71         sip = (struct sockaddr_in *) &(ifr->ifr_addr);
  72         printf("Intf-addr:%s\n", inet_ntoa(sip->sin_addr));
  73
  74         exit(0);
  75 }