home *** CD-ROM | disk | FTP | other *** search
- /*
- * 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
-
- #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;
-
- main(argc, argv)
- char **argv;
- {
- struct hostent *hep;
- struct sockaddr ea; /* Ethernet address */
- struct sockaddr_in *sip; /* Interface address */
- struct ifreq *ifr;
- struct in_addr dst_addr;
- struct in_addr *dap;
- int i, 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);
- }
-