/*
* DNS event related code
*/
static void dns_event_success(struct resolve *rp, int type)
{
if (!rp)
return;
if (type == T_PTR) {
debug2("DNS resolved %s to %s", iptostr(rp->ip), rp->hostn);
call_hostbyip(ntohl(rp->ip), rp->hostn, 1);
} else if (type == T_A) {
debug2("DNS resolved %s to %s", rp->hostn, iptostr(rp->ip));
call_ipbyhost(rp->hostn, ntohl(rp->ip), 1);
}
}
static void dns_event_failure(struct resolve *rp, int type)
{
if (!rp)
return;
if (type == T_PTR) {
static char s[UHOSTLEN];
debug1("DNS resolve failed for %s", iptostr(rp->ip));
strcpy(s, iptostr(rp->ip));
call_hostbyip(ntohl(rp->ip), s, 0);
} else if (type == T_A) {
debug1("DNS resolve failed for %s", rp->hostn);
call_ipbyhost(rp->hostn, 0, 0);
} else
debug2("DNS resolve failed for unknown %s / %s", iptostr(rp->ip),
nonull(rp->hostn));
return;
}
void block_dns_hostbyip(IP ip)
{
struct hostent *hp;
unsigned long addr = my_htonl(ip);
static char s[UHOSTLEN];
Context;
if (!setjmp(alarmret)) {
alarm(resolve_timeout);
hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
alarm(0);
if (hp) {
strncpy(s, hp->h_name, UHOSTLEN - 1);
s[UHOSTLEN - 1] = 0;
} else
strcpy(s, iptostr(addr));
} else {
hp = NULL;
strcpy(s, iptostr(addr));
}
/* Call hooks. */
call_hostbyip(ip, s, hp ? 1 : 0);
Context;
}