Attachment 598914 Details for Bug 626514 – example program from getifaddrs(3) man page

example program from getifaddrs(3) man page

getifaddrs.c (text/plain), 1.91 KB, created by Jiri Popelka on 2012-07-18 15:04:09 UTC

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Creator: Jiri Popelka

Created: 2012-07-18 15:04:09 UTC

Size: 1.91 KB

patch

obsolete

>       #include <arpa/inet.h>
>       #include <sys/socket.h>
>       #include <netdb.h>
>       #include <ifaddrs.h>
>       #include <stdio.h>
>       #include <stdlib.h>
>       #include <unistd.h>
>
>       int
>       main(int argc, char *argv[])
>       {
>           struct ifaddrs *ifaddr, *ifa;
>           int family, s;
>           char host[NI_MAXHOST];
>
>           if (getifaddrs(&ifaddr) == -1) {
>               perror("getifaddrs");
>               exit(EXIT_FAILURE);
>           }
>
>           /* Walk through linked list, maintaining head pointer so we
>              can free list later */
>
>           for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
>               if (ifa->ifa_addr == NULL)
>                   continue;
>
>               family = ifa->ifa_addr->sa_family;
>
>               /* Display interface name and family (including symbolic
>                  form of the latter for the common families) */
>
>               printf("%s  address family: %d%s\n",
>                       ifa->ifa_name, family,
>                       (family == AF_PACKET) ? " (AF_PACKET)" :
>                       (family == AF_INET) ?   " (AF_INET)" :
>                       (family == AF_INET6) ?  " (AF_INET6)" : "");
>
>               /* For an AF_INET* interface address, display the address */
>
>               if (family == AF_INET || family == AF_INET6) {
>                   s = getnameinfo(ifa->ifa_addr,
>                           (family == AF_INET) ? sizeof(struct sockaddr_in) :
>                                                 sizeof(struct sockaddr_in6),
>                           host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
>                   if (s != 0) {
>                       printf("getnameinfo() failed: %s\n", gai_strerror(s));
>                       exit(EXIT_FAILURE);
>                   }
>                   printf("\taddress: <%s>\n", host);
>               }
>           }
>
>           freeifaddrs(ifaddr);
>           exit(EXIT_SUCCESS);
>       }

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Attachments on bug 626514: 443055 | 443060 | 443128 | 446301 | 446939 | 596257 | 598914 | 602341 | 602342 | 602343 | 602344 | 602345 | 740389 | 740393 | 740670 | 741830 | 741831 | 743452 | 743453 | 819281 | 819282 | 819283 | 821802 | 901378 | 901379 | 901380