diff options
| author | Tobias Klauser <tklauser@distanz.ch> | 2016-08-29 11:21:04 +0200 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-08-29 11:21:04 +0200 |
| commit | d4ae5d9bb723e2ec2fcbaaa954cb76312bca1e7a (patch) | |
| tree | b5a6707d6f7ae01d3da378acfcd6e62e8e2d2b94 /llmnr.c | |
| parent | f46d59e0dc7b54a3f4a7ead2fd2d4258b3f56782 (diff) | |
llmnrd: Don't send empty AAAA response
Don't send an AAAA response if IPv6 is disabled or if no address of the
requested address family was found for a given interface.
Closes #10
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'llmnr.c')
| -rw-r--r-- | llmnr.c | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -127,10 +127,14 @@ static void llmnr_respond(unsigned int ifindex, const struct llmnr_hdr *hdr, qtype = ntohs(*((uint16_t *)query_name_end)); qclass = ntohs(*((uint16_t *)query_name_end + 1)); - /* Ony IN queries supported */ + /* Only IN queries supported */ if (qclass != LLMNR_QCLASS_IN) return; + /* No AAAA responses if IPv6 is disabled */ + if (llmnr_sock_ipv6 < 0 && qtype == LLMNR_QTYPE_AAAA) + return; + switch (qtype) { case LLMNR_QTYPE_A: family = AF_INET; @@ -146,6 +150,9 @@ static void llmnr_respond(unsigned int ifindex, const struct llmnr_hdr *hdr, } n = iface_addr_lookup(ifindex, family, addrs, ARRAY_SIZE(addrs)); + /* Don't respond if no address was found for the given interface */ + if (n == 0) + return; /* * This is the max response length (i.e. using all IPv6 addresses and |