diff options
| author | Chris Novakovic <chris@chrisn.me.uk> | 2018-04-24 03:56:34 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-24 13:40:41 -0400 |
| commit | 4e1a8af28d56a4194cf3f17c69d9d21183246f3a (patch) | |
| tree | 350e6a77f4766b144e6154b7b30789d34769a7ed /net/ipv4/ipconfig.c | |
| parent | e18bdc83aec4b7e187d9c54dc442a6ab3efac26d (diff) | |
| download | lwn-4e1a8af28d56a4194cf3f17c69d9d21183246f3a.tar.gz lwn-4e1a8af28d56a4194cf3f17c69d9d21183246f3a.zip | |
ipconfig: BOOTP: Don't request IEN-116 name servers
When ipconfig is autoconfigured via BOOTP, the request packet
initialised by ic_bootp_init_ext() allocates 8 bytes for tag 5 ("Name
Server" [1, §3.7]), but tag 5 in the response isn't processed by
ic_do_bootp_ext(). Instead, allocate the 8 bytes to tag 6 ("Domain Name
Server" [1, §3.8]), which is processed by ic_do_bootp_ext(), and appears
to have been the intended tag to request.
This won't cause any breakage for existing users, as tag 5 responses
provided by BOOTP servers weren't being processed anyway.
[1] RFC 2132, "DHCP Options and BOOTP Vendor Extensions":
https://tools.ietf.org/rfc/rfc2132.txt
Signed-off-by: Chris Novakovic <chris@chrisn.me.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipconfig.c')
| -rw-r--r-- | net/ipv4/ipconfig.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c index d0ea0ecc9008..bcf3c4f9882d 100644 --- a/net/ipv4/ipconfig.c +++ b/net/ipv4/ipconfig.c @@ -721,7 +721,7 @@ static void __init ic_bootp_init_ext(u8 *e) *e++ = 3; /* Default gateway request */ *e++ = 4; e += 4; - *e++ = 5; /* Name server request */ + *e++ = 6; /* (DNS) name server request */ *e++ = 8; e += 8; *e++ = 12; /* Host name request */ |