/*
 * trygetif.c - test program for getif.c
 */

#include <sys/types.h>
#include <sys/socket.h>

#if defined(SUNOS) || defined(SVR4)
#include <sys/sockio.h>
#endif

#ifdef _AIX32
#include <sys/time.h>   /* for struct timeval in net/if.h */
#endif
#include <net/if.h>                             /* for struct ifreq */
#include <netinet/in.h>
#include <arpa/inet.h>                  /* inet_ntoa */

#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>

#include "getif.h"

int debug = 0;
char *progname;

void
main(argc, argv)
        int argc;
        char **argv;
{
        struct hostent *hep;
        struct sockaddr_in *sip;        /* Interface address */
        struct ifreq *ifr;
        struct in_addr dst_addr;
        struct in_addr *dap;
        int s;

        progname = argv[0];                     /* for report */

        dap = NULL;
        if (argc > 1) {
                dap = &dst_addr;
                if (isdigit(argv[1][0]))
                        dst_addr.s_addr = inet_addr(argv[1]);
                else {
                        hep = gethostbyname(argv[1]);
                        if (!hep) {
                                printf("gethostbyname(%s)\n", argv[1]);
                                exit(1);
                        }
                        memcpy(&dst_addr, hep->h_addr, sizeof(dst_addr));
                }
        }
        s = socket(AF_INET, SOCK_DGRAM, 0);
        if (s < 0) {
                perror("socket open");
                exit(1);
        }
        ifr = getif(s, dap);
        if (!ifr) {
                printf("no interface for address\n");
                exit(1);
        }
        printf("Intf-name:%s\n", ifr->ifr_name);
        sip = (struct sockaddr_in *) &(ifr->ifr_addr);
        printf("Intf-addr:%s\n", inet_ntoa(sip->sin_addr));

        exit(0);
}