#if HAVE_CONFIG_H
#include <config.h>
#endif
#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>
#if HAVE_ARPA_NAMESER_COMPAT_H
#include <arpa/nameser_compat.h>
#endif
int main(int argc, char *argv[]) {
int r = 1, ret;
struct addrinfo *ai, hints;
struct sockaddr_in sa;
char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = "";
unsigned char *srv;
signal(SIGCHLD, SIG_IGN);
fprintf(stderr, "asyncns_new() failed\n");
goto fail;
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if (!q1)
fprintf(stderr, "asyncns_getaddrinfo(): %s\n", strerror(errno));
memset(&sa, 0, sizeof(sa));
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);
if (!q2)
fprintf(stderr, "asyncns_getnameinfo(): %s\n", strerror(errno));
if (!q3)
fprintf(stderr, "asyncns_res_query(): %s\n", strerror(errno));
fprintf(stderr, "asyncns_wait(): %s\n", strerror(errno));
goto fail;
}
}
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);
}
}
fprintf(stderr, "error: %s %i\n", gai_strerror(ret), ret);
else
printf("%s -- %s\n", host, serv);
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);
while (qdcount-- > 0 && (len = dn_expand(srv, end, pos, name, 255)) >= 0) {
assert(len >= 0);
pos += len + QFIXEDSZ;
}
while (ancount-- > 0 && (len = dn_expand(srv, end, pos, name, 255)) >= 0) {
uint16_t pref, weight, port;
assert(len >= 0);
pos += len;
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;
fail:
if (asyncns)
return r;
}