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

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