getaddrinfoex1.c - GetAddrInfoExA() test
Posted by Anonymous on Mon 6th Nov 2023 00:48
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/*
 * getaddrinfoex1.c - GetAddrInfoExA() test
 *
 * Compile on cygwin 3.5.0 $ clang getaddrinfoex1.c -lws2_32 && ./a #
 *
 * Written by Roland Mainz <roland.mainz@nrubsig.org>
 */
#define UNICODE 1

#include <ws2tcpip.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
  struct addrinfoexA hints;
  struct addrinfoexA *result;
  int error;

  WORD wVersionRequested;
  WSADATA wsaData;
  int err;

  wVersionRequested = MAKEWORD(2, 2);

  err = WSAStartup(wVersionRequested, &wsaData);

  memset(&hints, 0, sizeof(hints));
  hints.ai_family = AF_INET6/*AF_UNSPEC*/;
  hints.ai_socktype = SOCK_STREAM;
  hints.ai_protocol = IPPROTO_TCP;

  error = GetAddrInfoExA("derfwpc5131_ipv6", "2049", 0, NULL, &hints, &result, NULL, NULL, NULL, NULL);
  if (error != 0) {
    fprintf(stderr, "getaddrinfo: error='%ls'\n", gai_strerror(error));
    exit(1);
  }

  for (struct addrinfoexA *p = result; p != NULL; p = p->ai_next) {
    char host[NI_MAXHOST];
    char service[NI_MAXSERV];

    error = getnameinfo(p->ai_addr, p->ai_addrlen, host, NI_MAXHOST, service, NI_MAXSERV, NI_NUMERICHOST | NI_NUMERICSERV);
    if (error != 0) {
      fprintf(stderr, "getnameinfo: error='%ls'\n", gai_strerror(error));
      continue;
    }

    printf("res='%s':'%s'\n", host, service);
  }

//  FreeAddrInfoEx(result);

  return 0;
}