diff options
| author | Tobias Klauser <tklauser@distanz.ch> | 2018-02-16 17:00:48 +0100 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2018-02-16 17:00:48 +0100 |
| commit | 4dc24d0ecf7333ce139a8b8fb2e8477e14bfe092 (patch) | |
| tree | 9bc187a20472039dbaa2a3ac59eeb1014b588f6a | |
| parent | 731920807329ef1a6b26790296aa2c079435f18e (diff) | |
llmnrd: ignore queries with TC bit set
As per RFC 4795, section 2.1.1:
The 'TC' bit MUST NOT be set in an LLMNR query and, if set, is ignored
by an LLMNR responder.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
| -rw-r--r-- | llmnr.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -204,8 +204,8 @@ static void llmnr_packet_process(unsigned int ifindex, const uint8_t *pktbuf, si flags = ntohs(hdr->flags); qdcount = ntohs(hdr->qdcount); - /* Query invalid as per RFC 4795, section 2.1.1? */ - if (((flags & (LLMNR_F_QR | LLMNR_F_OPCODE)) != 0) || + /* Query invalid as per RFC 4795, section 2.1.1 */ + if (((flags & (LLMNR_F_QR | LLMNR_F_OPCODE | LLMNR_F_TC)) != 0) || qdcount != 1 || hdr->ancount != 0 || hdr->nscount != 0) return; |