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Report IPv4 and IPv6 addresses resolved for each host

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Previously, we would only request IPv4 addresses by default, or only
IPv6 when scanning with -6. Now, we'll request both (by not passing an
address family in the hints to getaddrinfo) and report them all in the
"Other addresses" line. This should encourage more users to scan with
-6. Additionally, it allows us to catch and report attempts to scan
IPv6-only hosts via IPv4, where previously we would just say "Failed to
resolve"

Closes #76
This commit is contained in:
dmiller
2015-03-11 04:14:26 +00:00
parent fbbb64a190
commit c0628fd141
2 changed files with 37 additions and 8 deletions
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13
output.cc
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@@ -1426,14 +1426,17 @@ void write_host_header(Target *currenths) {
write_host_status(currenths);
if (currenths->TargetName() != NULL
&& currenths->resolved_addrs.size() > 1) {
std::list<struct sockaddr_storage>::iterator it;
const struct sockaddr_storage *hs_ss = currenths->TargetSockAddr();
log_write(LOG_PLAIN, "Other addresses for %s (not scanned):",
currenths->TargetName());
it = currenths->resolved_addrs.begin();
it++;
for (; it != currenths->resolved_addrs.end(); it++)
log_write(LOG_PLAIN, " %s", inet_ntop_ez(&*it, sizeof(*it)));
for (std::list<struct sockaddr_storage>::const_iterator it = currenths->resolved_addrs.begin(), end = currenths->resolved_addrs.end();
it != end; it++) {
struct sockaddr_storage ss = *it;
if (!sockaddr_storage_equal(&ss, hs_ss)) {
log_write(LOG_PLAIN, " %s", inet_ntop_ez(&ss, sizeof(ss)));
}
}
log_write(LOG_PLAIN, "\n");
}
/* Print reverse DNS if it differs. */