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