| #include "adns.h"
#include <sys/errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int test_dns(char *host)
{
adns_state ads;
adns_initflags flags;
flags = adns_if_nosigpipe | adns_if_noerrprint;
adns_init(&ads, flags, NULL);
adns_query quer = NULL;
adns_submit(ads, host, (adns_rrtype) adns_r_a, (adns_queryflags) 0, NULL, &quer);
int tryCount = -1;
int adns_cname = 0;
while(tryCount < 32) {
tryCount += 1;
adns_answer *ans;
int res = adns_check(ads, &quer, &ans, NULL);
if(res == 0) {
if (ans->status == adns_s_prohibitedcname) {
char cname[128];
strncpy(cname, ans->cname, 127);
cname[strlen(ans->cname)] = '\0';
adns_query quer = NULL;
adns_submit(ads, cname, (adns_rrtype) adns_r_addr, (adns_queryflags) 0, NULL, &quer);
adns_cname = 1;
} else {
//resolve IPv4 address
/*
* if(adns_cname)
* printf("ip: %s\n", ans->status == adns_s_ok ? inet_ntoa(ans->rrs.addr->addr.inet.sin_addr) : "no");
* else
* printf("ip: %s\n", ans->status == adns_s_ok ? inet_ntoa(*(ans->rrs.inaddr)) : "no");
*/
//resolve IPv6 address
if(adns_cname){
if(ans->status == adns_s_ok){
char buf[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, &ans->rrs.addr->addr.inet6.sin6_addr, buf, sizeof(buf));
printf("ip: %s\n", buf);
}
else{
printf("no\n");
}
}
else{
if(ans->status == adns_s_ok){
char buf[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, ans->rrs.in6addr, buf, sizeof(buf));
printf("ip: %s\n", buf);
}
else{
printf("no\n");
}
}
adns_finish(ads);
break;
}
}
else if (res == ESRCH || res == EAGAIN) {
sleep(1);
} else {
printf("host(%s) is err!\n", host);
}
}
return 0;
}
int main(int argc, char *argv[]) {
char host[128];
while(1) {
scanf("%s", host);
if(strlen(host) == 3 && strcmp(host, "eof")) break;
test_dns(host);
}
return 0;
}
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