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| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2007-12-13 12:48:19 -0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:57:54 -0800 |
| commit | cf86314cb7460423b0b7e611edad80a52dc90d10 (patch) | |
| tree | 19c9389017f08828f2bcbbf1652904fa64aa8e84 /net/dccp | |
| parent | 5cdae198de33184c01226395b840f44f9834233a (diff) | |
| download | linux-cf86314cb7460423b0b7e611edad80a52dc90d10.tar.gz linux-cf86314cb7460423b0b7e611edad80a52dc90d10.tar.bz2 linux-cf86314cb7460423b0b7e611edad80a52dc90d10.zip | |
[DCCP]: Ignore feature negotiation on Data packets
This implements [RFC 4340, p. 32]: "any feature negotiation options received
on DCCP-Data packets MUST be ignored".
Also added a FIXME for further processing, since the code currently (wrongly)
classifies empty Confirm options as invalid - this needs to be resolved in
a separate patch.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
| -rw-r--r-- | net/dccp/options.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/dccp/options.c b/net/dccp/options.c index bedb5daaa3c5..d2a84a2fecee 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -132,6 +132,8 @@ int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq, case DCCPO_CHANGE_L: /* fall through */ case DCCPO_CHANGE_R: + if (pkt_type == DCCP_PKT_DATA) + break; if (len < 2) goto out_invalid_option; rc = dccp_feat_change_recv(sk, opt, *value, value + 1, @@ -148,7 +150,9 @@ int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq, case DCCPO_CONFIRM_L: /* fall through */ case DCCPO_CONFIRM_R: - if (len < 2) + if (pkt_type == DCCP_PKT_DATA) + break; + if (len < 2) /* FIXME this disallows empty confirm */ goto out_invalid_option; if (dccp_feat_confirm_recv(sk, opt, *value, value + 1, len - 1)) |