115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/***
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This file is part of systemd.
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Copyright 2005-2008 Lennart Poettering
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Copyright 2014 Daniel Buch
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <arpa/inet.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/socket.h>
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#include "sd-resolve.h"
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#include "alloc-util.h"
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#include "macro.h"
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#include "socket-util.h"
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#include "string-util.h"
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static int getaddrinfo_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, void *userdata) {
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const struct addrinfo *i;
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assert_se(q);
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if (ret != 0) {
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log_error("getaddrinfo error: %s %i", gai_strerror(ret), ret);
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return 0;
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}
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for (i = ai; i; i = i->ai_next) {
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_cleanup_free_ char *addr = NULL;
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assert_se(sockaddr_pretty(i->ai_addr, i->ai_addrlen, false, true, &addr) == 0);
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puts(addr);
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}
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printf("canonical name: %s\n", strna(ai->ai_canonname));
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return 0;
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}
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static int getnameinfo_handler(sd_resolve_query *q, int ret, const char *host, const char *serv, void *userdata) {
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assert_se(q);
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if (ret != 0) {
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log_error("getnameinfo error: %s %i", gai_strerror(ret), ret);
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return 0;
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}
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printf("Host: %s — Serv: %s\n", strna(host), strna(serv));
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return 0;
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}
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int main(int argc, char *argv[]) {
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_cleanup_(sd_resolve_query_unrefp) sd_resolve_query *q1 = NULL, *q2 = NULL;
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_cleanup_(sd_resolve_unrefp) sd_resolve *resolve = NULL;
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int r = 0;
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struct addrinfo hints = {
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.ai_family = PF_UNSPEC,
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.ai_socktype = SOCK_STREAM,
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.ai_flags = AI_CANONNAME
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};
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struct sockaddr_in sa = {
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.sin_family = AF_INET,
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.sin_port = htons(80)
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};
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assert_se(sd_resolve_default(&resolve) >= 0);
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/* Test a floating resolver query */
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sd_resolve_getaddrinfo(resolve, NULL, "redhat.com", "http", NULL, getaddrinfo_handler, NULL);
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/* Make a name -> address query */
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r = sd_resolve_getaddrinfo(resolve, &q1, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints, getaddrinfo_handler, NULL);
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if (r < 0)
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log_error_errno(r, "sd_resolve_getaddrinfo(): %m");
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/* Make an address -> name query */
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sa.sin_addr.s_addr = inet_addr(argc >= 3 ? argv[2] : "193.99.144.71");
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r = sd_resolve_getnameinfo(resolve, &q2, (struct sockaddr*) &sa, sizeof(sa), 0, SD_RESOLVE_GET_BOTH, getnameinfo_handler, NULL);
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if (r < 0)
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log_error_errno(r, "sd_resolve_getnameinfo(): %m");
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/* Wait until all queries are completed */
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for (;;) {
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r = sd_resolve_wait(resolve, (uint64_t) -1);
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if (r == 0)
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break;
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if (r < 0) {
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log_error_errno(r, "sd_resolve_wait(): %m");
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assert_not_reached("sd_resolve_wait() failed");
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}
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}
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return 0;
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}
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