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
***/
#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 "socket-util.h"
#include "sd-resolve.h"
#include "resolve-util.h"
#include "macro.h"
-int main(int argc, char *argv[]) {
- int r = 1;
- _cleanup_resolve_unref_ sd_resolve *resolve = NULL;
- _cleanup_resolve_addrinfo_free_ struct addrinfo *ai = NULL;
- _cleanup_free_ unsigned char *srv = NULL;
- sd_resolve_query *q1 = NULL, *q2 = NULL, *q3 = NULL;
- struct addrinfo hints = {};
- struct sockaddr_in sa = {};
- _cleanup_free_ char *host = NULL, *serv = NULL;
+static int getaddrinfo_handler(sd_resolve_query *q, int ret, const struct addrinfo *ai, void *userdata) {
+ const struct addrinfo *i;
- assert_se(sd_resolve_new(&resolve) >= 0);
+ assert_se(q);
- /* Make a name -> address query */
- hints.ai_family = PF_UNSPEC;
- hints.ai_socktype = SOCK_STREAM;
- hints.ai_flags = AI_CANONNAME;
+ if (ret != 0) {
+ log_error("getaddrinfo error: %s %i", gai_strerror(ret), ret);
+ return 0;
+ }
- r = sd_resolve_getaddrinfo(resolve, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints, &q1);
- if (r < 0)
- log_error("sd_resolve_getaddrinfo(): %s\n", strerror(-r));
+ for (i = ai; i; i = i->ai_next) {
+ _cleanup_free_ char *addr = NULL;
- /* 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);
+ assert_se(sockaddr_pretty(i->ai_addr, i->ai_addrlen, false, true, &addr) == 0);
+ puts(addr);
+ }
- r = sd_resolve_getnameinfo(resolve, (struct sockaddr*) &sa, sizeof(sa), 0, true, true, &q2);
- if (r < 0)
- log_error("sd_resolve_getnameinfo(): %s\n", strerror(-r));
+ printf("canonical name: %s\n", strna(ai->ai_canonname));
- /* Make a res_query() call */
- r = sd_resolve_res_query(resolve, "_xmpp-client._tcp.gmail.com", C_IN, T_SRV, &q3);
- if (r < 0)
- log_error("sd_resolve_res_query(): %s\n", strerror(-r));
+ return 0;
+}
- /* Wait until the three queries are completed */
- while (sd_resolve_is_done(q1) == 0 ||
- sd_resolve_is_done(q2) == 0 ||
- sd_resolve_is_done(q3) == 0) {
+static int getnameinfo_handler(sd_resolve_query *q, int ret, const char *host, const char *serv, void *userdata) {
+ assert_se(q);
- r = sd_resolve_wait(resolve, (uint64_t) -1);
- if (r < 0) {
- log_error("sd_resolve_wait(): %s\n", strerror(-r));
- assert_not_reached("sd_resolve_wait() failed");
- }
+ if (ret != 0) {
+ log_error("getnameinfo error: %s %i", gai_strerror(ret), ret);
+ return 0;
}
- /* Interpret the result of the name -> addr query */
- r = sd_resolve_getaddrinfo_done(q1, &ai);
- if (r != 0)
- log_error("error: %s %i\n", gai_strerror(r), r);
- else {
- struct addrinfo *i;
+ printf("Host: %s -- Serv: %s\n", strna(host), strna(serv));
+ return 0;
+}
+
+static int res_handler(sd_resolve_query *q, int ret, unsigned char *answer, void *userdata) {
+ int qdcount, ancount, len;
+ const unsigned char *pos = answer + sizeof(HEADER);
+ unsigned char *end = answer + ret;
+ HEADER *head = (HEADER *) answer;
+ char name[256];
+ assert_se(q);
+
+ if (ret < 0) {
+ log_error("res_query() error: %s %i", strerror(errno), errno);
+ return 0;
+ }
- for (i = ai; i; i = i->ai_next) {
- char t[256];
- const char *p = NULL;
+ if (ret == 0) {
+ log_error("No reply for SRV lookup");
+ return 0;
+ }
- 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));
+ qdcount = ntohs(head->qdcount);
+ ancount = ntohs(head->ancount);
- printf("%s\n", p);
- }
+ printf("%d answers for srv lookup:\n", ancount);
- printf("canonical name: %s\n", strna(ai->ai_canonname));
+ /* Ignore the questions */
+ while (qdcount-- > 0 && (len = dn_expand(answer, end, pos, name, 255)) >= 0) {
+ assert_se(len >= 0);
+ pos += len + QFIXEDSZ;
}
- /* Interpret the result of the addr -> name query */
- r = sd_resolve_getnameinfo_done(q2, &host, &serv);
- if (r)
- log_error("error: %s %i\n", gai_strerror(r), r);
- else
- printf("%s -- %s\n", host, serv);
+ /* Parse the answers */
+ while (ancount-- > 0 && (len = dn_expand(answer, end, pos, name, 255)) >= 0) {
+ /* Ignore the initial string */
+ uint16_t pref, weight, port;
+ assert_se(len >= 0);
+ pos += len;
+ /* Ignore type, ttl, class and dlen */
+ pos += 10;
+
+ GETSHORT(pref, pos);
+ GETSHORT(weight, pos);
+ GETSHORT(port, pos);
+ len = dn_expand(answer, end, pos, name, 255);
+ printf("\tpreference: %2d weight: %2d port: %d host: %s\n",
+ pref, weight, port, name);
+
+ pos += len;
+ }
- /* Interpret the result of the SRV lookup */
- r = sd_resolve_res_done(q3, &srv);
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_resolve_query_unref_ sd_resolve_query *q1 = NULL, *q2 = NULL, *q3 = NULL;
+ _cleanup_resolve_unref_ 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("error: %s %i\n", strerror(-r), r);
- else if (r == 0)
- log_error("No reply for SRV lookup\n");
- else {
- int qdcount;
- int ancount;
- int len;
- const unsigned char *pos = srv + sizeof(HEADER);
- unsigned char *end = srv + r;
- 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;
- }
+ log_error_errno(r, "sd_resolve_getaddrinfo(): %m");
- /* 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;
+ /* 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");
+
+ /* Make a res_query() call */
+ r = sd_resolve_res_query(resolve, &q3, "_xmpp-client._tcp.gmail.com", C_IN, T_SRV, res_handler, NULL);
+ if (r < 0)
+ log_error_errno(r, "sd_resolve_res_query(): %m");
+
+ /* Wait until the three queries are completed */
+ while (sd_resolve_query_is_done(q1) == 0 ||
+ sd_resolve_query_is_done(q2) == 0 ||
+ sd_resolve_query_is_done(q3) == 0) {
+
+ r = sd_resolve_wait(resolve, (uint64_t) -1);
+ if (r < 0) {
+ log_error_errno(r, "sd_resolve_wait(): %m");
+ assert_not_reached("sd_resolve_wait() failed");
}
}
- r = 0;
-
- return r;
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff