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Fixed core when sending back a redirect and having an invalid server response #7004

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merged 1 commit into from
Jul 16, 2020
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Fixed core when sending back a redirect and having an invalid server response #7004

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29 changes: 17 additions & 12 deletions proxy/http/HttpTransact.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1919,22 +1919,27 @@ HttpTransact::OSDNSLookup(State *s)
ink_release_assert(s->http_config_param->redirect_actions_map->contains(s->host_db_info.ip(), reinterpret_cast<void **>(&x)));
action = static_cast<RedirectEnabled::Action>(x);
}
switch (action) {
case RedirectEnabled::Action::FOLLOW:

if (action == RedirectEnabled::Action::FOLLOW) {
TxnDebug("http_trans", "[OSDNSLookup] Invalid redirect address. Following");
break;
case RedirectEnabled::Action::REJECT:
TxnDebug("http_trans", "[OSDNSLookup] Invalid redirect address. Rejecting.");
} else if (action == RedirectEnabled::Action::REJECT || s->hdr_info.server_response.valid() == false) {
if (action == RedirectEnabled::Action::REJECT) {
TxnDebug("http_trans", "[OSDNSLookup] Invalid redirect address. Rejecting.");
} else {
// Invalid server response, since we can't copy it we are going to reject
TxnDebug("http_trans", "[OSDNSLookup] Invalid server response. Rejecting.");
Error("Invalid server response. Rejecting.");
}
build_error_response(s, HTTP_STATUS_FORBIDDEN, nullptr, "request#syntax_error");
SET_VIA_STRING(VIA_DETAIL_TUNNEL, VIA_DETAIL_TUNNEL_NO_FORWARD);
TRANSACT_RETURN(SM_ACTION_SEND_ERROR_CACHE_NOOP, nullptr);
break;
case RedirectEnabled::Action::RETURN:
TxnDebug("http_trans", "[OSDNSLookup] Configured to return on invalid redirect address.");
// fall-through
default:
// Return this 3xx to the client as-is.
TxnDebug("http_trans", "[OSDNSLookup] Invalid redirect address. Returning.");
} else {
// Return this 3xx to the client as-is
if (action == RedirectEnabled::Action::RETURN) {
TxnDebug("http_trans", "[OSDNSLookup] Configured to return on invalid redirect address.");
} else {
TxnDebug("http_trans", "[OSDNSLookup] Invalid redirect address. Returning.");
}
build_response_copy(s, &s->hdr_info.server_response, &s->hdr_info.client_response, s->client_info.http_version);
TRANSACT_RETURN(SM_ACTION_INTERNAL_CACHE_NOOP, nullptr);
}
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