test_ifaddrs.c

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/*
 * src/tools/ifaddrs/test_ifaddrs.c
 *
 *
 *  test_ifaddrs.c
 *      test pg_foreach_ifaddr()
 */

#include "postgres.h"

#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>

#include "libpq/ip.h"


static void
print_addr(struct sockaddr * addr)
{
    char        buffer[256];
    int         ret,
                len;

    switch (addr->sa_family)
    {
        case AF_INET:
            len = sizeof(struct sockaddr_in);
            break;
#ifdef HAVE_IPV6
        case AF_INET6:
            len = sizeof(struct sockaddr_in6);
            break;
#endif
        default:
            len = sizeof(struct sockaddr_storage);
            break;
    }

    ret = getnameinfo(addr, len, buffer, sizeof(buffer), NULL, 0,
                      NI_NUMERICHOST);
    if (ret != 0)
        printf("[unknown: family %d]", addr->sa_family);
    else
        printf("%s", buffer);
}

static void
callback(struct sockaddr * addr, struct sockaddr * mask, void *unused)
{
    printf("addr: ");
    print_addr(addr);
    printf("  mask: ");
    print_addr(mask);
    printf("\n");
}

int
main(int argc, char *argv[])
{
#ifdef WIN32
    WSADATA     wsaData;

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        fprintf(stderr, "WSAStartup failed\n");
        return 1;
    }
#endif

    if (pg_foreach_ifaddr(callback, NULL) < 0)
        fprintf(stderr, "pg_foreach_ifaddr failed: %s\n", strerror(errno));
    return 0;
}