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HTTP/Upgrade: Weird when more data is available

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After an HTTP upgrade to another protocol, create a weird if the packet
that contains the HTTP reply *also* contains some additional data
belonging to the upgraded to protocol already.
This commit is contained in:
Arne Welzel 2024-01-18 21:14:01 +01:00
parent 2b9776adca
commit de836ab528
1 changed files with 15 additions and 0 deletions
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15
src/analyzer/protocol/http/HTTP.cc
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@ -1325,6 +1325,21 @@ void HTTP_Analyzer::ReplyMade(bool interrupted, const char* msg) {
void HTTP_Analyzer::HTTP_Upgrade() {
// Upgraded connection that switches immediately - e.g. websocket.
int remaining_in_content_line = content_line_resp->GetDeliverStreamRemainingLength();
if ( remaining_in_content_line > 0 ) {
// We've seen a complete HTTP response for an upgrade request and there's
// more data buffered in the ContentLine analyzer. This means the next
// protocol's data is in the same packet as the HTTP reply. Log a weird
// as this seems not very likely to happen in the wild.
const char* addl = zeek::util::fmt("%d", remaining_in_content_line);
Weird("protocol_data_with_HTTP_upgrade_reply", addl);
// Switch the ContentLine analyzer to deliver anything remaining in
// plain mode so it can be forwarded to the upgrade analyzer.
content_line_resp->SetPlainDelivery(remaining_in_content_line);
}
// Lookup an analyzer tag in the HTTP::upgrade_analyzer table.
static const auto& upgrade_analyzers = id::find_val<TableVal>("HTTP::upgrade_analyzers");