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Handle chained CNAME records

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This commit is contained in:
dmiller
2024-04-26 17:25:41 +00:00
parent 3cac585f69
commit bf2acde232
1 changed files with 3 additions and 3 deletions
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6
nmap_dns.cc
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@@ -762,7 +762,7 @@ static void read_evt_handler(nsock_pool nsp, nsock_event evt, void *) {
else if (a.record_type == DNS::CNAME) { else if (a.record_type == DNS::CNAME) {
const DNS::CNAME_Record *cname = static_cast<const DNS::CNAME_Record *>(a.record); const DNS::CNAME_Record *cname = static_cast<const DNS::CNAME_Record *>(a.record);
if((reqt->type == DNS::PTR && DNS::Factory::ptrToIp(a.name, ip)) if((reqt->type == DNS::PTR && DNS::Factory::ptrToIp(a.name, ip))
|| a.name == reqt->name) || a.name == reqt->name || (!alias.empty() && a.name == alias))
{ {
alias = cname->value; alias = cname->value;
if (o.debugging >= TRACE_DEBUG_LEVEL) if (o.debugging >= TRACE_DEBUG_LEVEL)
@@ -782,7 +782,7 @@ static void read_evt_handler(nsock_pool nsp, nsock_event evt, void *) {
else if (!alias.empty()) { else if (!alias.empty()) {
if (o.debugging >= TRACE_DEBUG_LEVEL) if (o.debugging >= TRACE_DEBUG_LEVEL)
{ {
log_write(LOG_STDOUT, "mass_dns: CNAME for <%s> not processed.\n", reqinfo.tpreq->targ->repr()); log_write(LOG_STDOUT, "mass_dns: CNAME for <%s> not processed.\n", reqt->repr());
} }
// TODO: Send a PTR request for alias instead. Meanwhile, we'll just fall // TODO: Send a PTR request for alias instead. Meanwhile, we'll just fall
// back to using system resolver. Alternative: report the canonical name // back to using system resolver. Alternative: report the canonical name
@@ -791,7 +791,7 @@ static void read_evt_handler(nsock_pool nsp, nsock_event evt, void *) {
} }
else { else {
if (o.debugging >= TRACE_DEBUG_LEVEL) { if (o.debugging >= TRACE_DEBUG_LEVEL) {
log_write(LOG_STDOUT, "mass_dns: Unable to process the response\n"); log_write(LOG_STDOUT, "mass_dns: Unable to process the response for %s\n", reqt->repr());
} }
} }
} }