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Ignore case when matching resolved names. Fixes #3410

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This commit is contained in:
dmiller 2026-07-23 21:55:43 +00:00
parent 72544c0b9e
commit f8b3de041d
1 changed files with 8 additions and 3 deletions
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11
libnetutil/massdns.cc
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@ -1157,6 +1157,11 @@ void DNS::ResolverImpl::process_request(int action, info &reqinfo) {
}
}
bool iequals(const std::string &a, const std::string &b)
{
return a.size() == b.size() && (0 == strcasecmp(a.c_str(), b.c_str()));
}
// After processing a DNS response, we search through the IPs we're
// looking for and update their results as necessary.
bool DNS::ResolverImpl::process_result(const std::string &name, const DNS::Record *rr,
@ -1179,7 +1184,7 @@ bool DNS::ResolverImpl::process_result(const std::string &name, const DNS::Recor
case DNS::A:
case DNS::AAAA:
case DNS::ANY:
if (!already_matched && name != reqt->name) {
if (!already_matched && !iequals(name, reqt->name)) {
return false;
}
a_rec = static_cast<const DNS::A_Record *>(rr);
@ -1311,7 +1316,7 @@ void DNS::ResolverImpl::handle_read(nsock_pool nsp, nsock_event evt, dns_server
if(a.record_class == DNS::CLASS_IN)
{
if (wire_type(reqt->type) == a.record_type) {
processing_successful = process_result(a.name, a.record, reqinfo, a.name == alias);
processing_successful = process_result(a.name, a.record, reqinfo, iequals(a.name,alias));
if (!processing_successful) {
log_func(1, "mass_dns: Mismatched record for request %s\n", reqt->repr());
}
@ -1319,7 +1324,7 @@ void DNS::ResolverImpl::handle_read(nsock_pool nsp, nsock_event evt, dns_server
else if (a.record_type == DNS::CNAME) {
const DNS::CNAME_Record *cname = static_cast<const DNS::CNAME_Record *>(a.record);
if((reqt->type == DNS::PTR && DNS::Factory::ptrToIp(a.name, ip))
|| a.name == reqt->name || (!alias.empty() && a.name == alias))
|| iequals(a.name, reqt->name) || (!alias.empty() && iequals(a.name, alias)))
{
alias = cname->value;
log_func(TRACE_DEBUG_LEVEL, "mass_dns: CNAME found for <%s> to <%s>\n", a.name.c_str(), alias.c_str());