src/libsystemd/sd-resolve/test-resolve.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2005-2008 Lennart Poettering
   6   Copyright 2014 Daniel Buch
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <arpa/inet.h>
  23 #include <errno.h>
  24 #include <netinet/in.h>
  25 #include <resolv.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <sys/socket.h>
  29
  30 #include "sd-resolve.h"
  31
  32 #include "alloc-util.h"
  33 #include "macro.h"
  34 #include "socket-util.h"
  35 #include "string-util.h"
  36
  37 static int getaddrinfo_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, void *userdata) {
  38         const struct addrinfo *i;
  39
  40         assert_se(q);
  41
  42         if (ret != 0) {
  43                 log_error("getaddrinfo error: %s %i", gai_strerror(ret), ret);
  44                 return 0;
  45         }
  46
  47         for (i = ai; i; i = i->ai_next) {
  48                 _cleanup_free_ char *addr = NULL;
  49
  50                 assert_se(sockaddr_pretty(i->ai_addr, i->ai_addrlen, false, true, &addr) == 0);
  51                 puts(addr);
  52         }
  53
  54         printf("canonical name: %s\n", strna(ai->ai_canonname));
  55
  56         return 0;
  57 }
  58
  59 static int getnameinfo_handler(sd_resolve_query *q, int ret, const char *host, const char *serv, void *userdata) {
  60         assert_se(q);
  61
  62         if (ret != 0) {
  63                 log_error("getnameinfo error: %s %i", gai_strerror(ret), ret);
  64                 return 0;
  65         }
  66
  67         printf("Host: %s — Serv: %s\n", strna(host), strna(serv));
  68         return 0;
  69 }
  70
  71 int main(int argc, char *argv[]) {
  72         _cleanup_(sd_resolve_query_unrefp) sd_resolve_query *q1 = NULL, *q2 = NULL;
  73         _cleanup_(sd_resolve_unrefp) sd_resolve *resolve = NULL;
  74         int r = 0;
  75
  76         struct addrinfo hints = {
  77                 .ai_family = PF_UNSPEC,
  78                 .ai_socktype = SOCK_STREAM,
  79                 .ai_flags = AI_CANONNAME
  80         };
  81
  82         struct sockaddr_in sa = {
  83                 .sin_family = AF_INET,
  84                 .sin_port = htons(80)
  85         };
  86
  87         assert_se(sd_resolve_default(&resolve) >= 0);
  88
  89         /* Test a floating resolver query */
  90         sd_resolve_getaddrinfo(resolve, NULL, "redhat.com", "http", NULL, getaddrinfo_handler, NULL);
  91
  92         /* Make a name -> address query */
  93         r = sd_resolve_getaddrinfo(resolve, &q1, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints, getaddrinfo_handler, NULL);
  94         if (r < 0)
  95                 log_error_errno(r, "sd_resolve_getaddrinfo(): %m");
  96
  97         /* Make an address -> name query */
  98         sa.sin_addr.s_addr = inet_addr(argc >= 3 ? argv[2] : "193.99.144.71");
  99         r = sd_resolve_getnameinfo(resolve, &q2, (struct sockaddr*) &sa, sizeof(sa), 0, SD_RESOLVE_GET_BOTH, getnameinfo_handler, NULL);
 100         if (r < 0)
 101                 log_error_errno(r, "sd_resolve_getnameinfo(): %m");
 102
 103         /* Wait until all queries are completed */
 104         for (;;) {
 105                 r = sd_resolve_wait(resolve, (uint64_t) -1);
 106                 if (r == 0)
 107                         break;
 108                 if (r < 0) {
 109                         log_error_errno(r, "sd_resolve_wait(): %m");
 110                         assert_not_reached("sd_resolve_wait() failed");
 111                 }
 112         }
 113
 114         return 0;
 115 }