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

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2005-2008 Lennart Poettering
   7   Copyright 2014 Daniel Buch
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <arpa/inet.h>
  24 #include <errno.h>
  25 #include <netinet/in.h>
  26 #include <resolv.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <sys/socket.h>
  30
  31 #include "sd-resolve.h"
  32
  33 #include "macro.h"
  34 #include "resolve-util.h"
  35 #include "socket-util.h"
  36 #include "string-util.h"
  37
  38 static int getaddrinfo_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, void *userdata) {
  39         const struct addrinfo *i;
  40
  41         assert_se(q);
  42
  43         if (ret != 0) {
  44                 log_error("getaddrinfo error: %s %i", gai_strerror(ret), ret);
  45                 return 0;
  46         }
  47
  48         for (i = ai; i; i = i->ai_next) {
  49                 _cleanup_free_ char *addr = NULL;
  50
  51                 assert_se(sockaddr_pretty(i->ai_addr, i->ai_addrlen, false, true, &addr) == 0);
  52                 puts(addr);
  53         }
  54
  55         printf("canonical name: %s\n", strna(ai->ai_canonname));
  56
  57         return 0;
  58 }
  59
  60 static int getnameinfo_handler(sd_resolve_query *q, int ret, const char *host, const char *serv, void *userdata) {
  61         assert_se(q);
  62
  63         if (ret != 0) {
  64                 log_error("getnameinfo error: %s %i", gai_strerror(ret), ret);
  65                 return 0;
  66         }
  67
  68         printf("Host: %s -- Serv: %s\n", strna(host), strna(serv));
  69         return 0;
  70 }
  71
  72 int main(int argc, char *argv[]) {
  73         _cleanup_resolve_query_unref_ sd_resolve_query *q1 = NULL, *q2 = NULL;
  74         _cleanup_resolve_unref_ sd_resolve *resolve = NULL;
  75         int r = 0;
  76
  77         struct addrinfo hints = {
  78                 .ai_family = PF_UNSPEC,
  79                 .ai_socktype = SOCK_STREAM,
  80                 .ai_flags = AI_CANONNAME
  81         };
  82
  83         struct sockaddr_in sa = {
  84                 .sin_family = AF_INET,
  85                 .sin_port = htons(80)
  86         };
  87
  88         assert_se(sd_resolve_default(&resolve) >= 0);
  89
  90         /* Test a floating resolver query */
  91         sd_resolve_getaddrinfo(resolve, NULL, "redhat.com", "http", NULL, getaddrinfo_handler, NULL);
  92
  93         /* Make a name -> address query */
  94         r = sd_resolve_getaddrinfo(resolve, &q1, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints, getaddrinfo_handler, NULL);
  95         if (r < 0)
  96                 log_error_errno(r, "sd_resolve_getaddrinfo(): %m");
  97
  98         /* Make an address -> name query */
  99         sa.sin_addr.s_addr = inet_addr(argc >= 3 ? argv[2] : "193.99.144.71");
 100         r = sd_resolve_getnameinfo(resolve, &q2, (struct sockaddr*) &sa, sizeof(sa), 0, SD_RESOLVE_GET_BOTH, getnameinfo_handler, NULL);
 101         if (r < 0)
 102                 log_error_errno(r, "sd_resolve_getnameinfo(): %m");
 103
 104         /* Wait until the two queries are completed */
 105         while (sd_resolve_query_is_done(q1) == 0 ||
 106                sd_resolve_query_is_done(q2) == 0) {
 107
 108                 r = sd_resolve_wait(resolve, (uint64_t) -1);
 109                 if (r < 0) {
 110                         log_error_errno(r, "sd_resolve_wait(): %m");
 111                         assert_not_reached("sd_resolve_wait() failed");
 112                 }
 113         }
 114
 115         return 0;
 116 }