+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2005-2008 Lennart Poettering
-
- 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 <http://www.gnu.org/licenses/>.
-***/
-
-#include <string.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
-#include <stdio.h>
-#include <netinet/in.h>
-#include <arpa/nameser.h>
-#include <resolv.h>
-#include <assert.h>
-#include <signal.h>
-#include <errno.h>
-
-#include "sd-dns.h"
-#include "dns-util.h"
-#include "macro.h"
-
-int main(int argc, char *argv[]) {
- int r = 1, ret;
- _cleanup_asyncns_free_ asyncns_t *asyncns = NULL;
- _cleanup_asyncns_addrinfo_free_ struct addrinfo *ai = NULL;
- _cleanup_asyncns_answer_free_ unsigned char *srv = NULL;
- asyncns_query_t *q1, *q2, *q3;
- struct addrinfo hints = {};
- struct sockaddr_in sa = {};
- char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = "";
-
- signal(SIGCHLD, SIG_IGN);
-
- asyncns = asyncns_new(2);
- if (!asyncns)
- log_oom();
-
- /* Make a name -> address query */
- hints.ai_family = PF_UNSPEC;
- hints.ai_socktype = SOCK_STREAM;
-
- q1 = asyncns_getaddrinfo(asyncns, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints);
- if (!q1)
- fprintf(stderr, "asyncns_getaddrinfo(): %s\n", strerror(errno));
-
- /* Make an address -> name query */
- sa.sin_family = AF_INET;
- sa.sin_addr.s_addr = inet_addr(argc >= 3 ? argv[2] : "193.99.144.71");
- sa.sin_port = htons(80);
-
- q2 = asyncns_getnameinfo(asyncns, (struct sockaddr*) &sa, sizeof(sa), 0, 1, 1);
- if (!q2)
- fprintf(stderr, "asyncns_getnameinfo(): %s\n", strerror(errno));
-
- /* Make a res_query() call */
- q3 = asyncns_res_query(asyncns, "_xmpp-client._tcp.gmail.com", C_IN, T_SRV);
- if (!q3)
- fprintf(stderr, "asyncns_res_query(): %s\n", strerror(errno));
-
- /* Wait until the three queries are completed */
- while (!asyncns_isdone(asyncns, q1) ||
- !asyncns_isdone(asyncns, q2) ||
- !asyncns_isdone(asyncns, q3)) {
- if (asyncns_wait(asyncns, 1) < 0)
- fprintf(stderr, "asyncns_wait(): %s\n", strerror(errno));
- }
-
- /* Interpret the result of the name -> addr query */
- ret = asyncns_getaddrinfo_done(asyncns, q1, &ai);
- if (ret)
- fprintf(stderr, "error: %s %i\n", gai_strerror(ret), ret);
- else {
- struct addrinfo *i;
-
- for (i = ai; i; i = i->ai_next) {
- char t[256];
- const char *p = NULL;
-
- if (i->ai_family == PF_INET)
- p = inet_ntop(AF_INET, &((struct sockaddr_in*) i->ai_addr)->sin_addr, t, sizeof(t));
- else if (i->ai_family == PF_INET6)
- p = inet_ntop(AF_INET6, &((struct sockaddr_in6*) i->ai_addr)->sin6_addr, t, sizeof(t));
-
- printf("%s\n", p);
- }
- }
-
- /* Interpret the result of the addr -> name query */
- ret = asyncns_getnameinfo_done(asyncns, q2, host, sizeof(host), serv, sizeof(serv));
- if (ret)
- fprintf(stderr, "error: %s %i\n", gai_strerror(ret), ret);
- else
- printf("%s -- %s\n", host, serv);
-
- /* Interpret the result of the SRV lookup */
- ret = asyncns_res_done(asyncns, q3, &srv);
- if (ret < 0) {
- fprintf(stderr, "error: %s %i\n", strerror(errno), ret);
- } else if (ret == 0) {
- fprintf(stderr, "No reply for SRV lookup\n");
- } else {
- int qdcount;
- int ancount;
- int len;
- const unsigned char *pos = srv + sizeof(HEADER);
- unsigned char *end = srv + ret;
- HEADER *head = (HEADER *)srv;
- char name[256];
-
- qdcount = ntohs(head->qdcount);
- ancount = ntohs(head->ancount);
-
- printf("%d answers for srv lookup:\n", ancount);
-
- /* Ignore the questions */
- while (qdcount-- > 0 && (len = dn_expand(srv, end, pos, name, 255)) >= 0) {
- assert(len >= 0);
- pos += len + QFIXEDSZ;
- }
-
- /* Parse the answers */
- while (ancount-- > 0 && (len = dn_expand(srv, end, pos, name, 255)) >= 0) {
- /* Ignore the initial string */
- uint16_t pref, weight, port;
- assert(len >= 0);
- pos += len;
- /* Ignore type, ttl, class and dlen */
- pos += 10;
-
- GETSHORT(pref, pos);
- GETSHORT(weight, pos);
- GETSHORT(port, pos);
- len = dn_expand(srv, end, pos, name, 255);
- printf("\tpreference: %2d weight: %2d port: %d host: %s\n",
- pref, weight, port, name);
-
- pos += len;
- }
- }
-
- r = 0;
-
- return r;
-}
~ianmdlvl / elogind.git / blobdiff