diff options
| author |   Wei Yongjun <yjwei@cn.fujitsu.com> | 2008-05-27 06:22:38 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2008-05-27 06:22:38 -0700 |
| commit | 6079a463cf95fafcc704a4e5e92a4da12444bd3c (patch) | |
| tree | 00080f77f8bef52b78cdbb8762c2625dac18b4fc | |
| parent | vlan: Use bitmask of feature flags instead of seperate feature bits (diff) | |
| download | linux-dev-6079a463cf95fafcc704a4e5e92a4da12444bd3c.tar.xz linux-dev-6079a463cf95fafcc704a4e5e92a4da12444bd3c.zip | |
dccp: Fix to handle short sequence numbers packet correctly
RFC4340 said:
8.5. Pseudocode
...
If P.type is not Data, Ack, or DataAck and P.X == 0 (the packet
has short sequence numbers), drop packet and return
But DCCP has some mistake to handle short sequence numbers packet, now
it drop packet only if P.type is Data, Ack, or DataAck and P.X == 0.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/dccp/ipv4.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index b348dd70c685..c22a3780c14e 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -739,8 +739,8 @@ int dccp_invalid_packet(struct sk_buff *skb) * If P.type is not Data, Ack, or DataAck and P.X == 0 (the packet * has short sequence numbers), drop packet and return */ - if (dh->dccph_type >= DCCP_PKT_DATA && - dh->dccph_type <= DCCP_PKT_DATAACK && dh->dccph_x == 0) { + if ((dh->dccph_type < DCCP_PKT_DATA || + dh->dccph_type > DCCP_PKT_DATAACK) && dh->dccph_x == 0) { DCCP_WARN("P.type (%s) not Data || [Data]Ack, while P.X == 0\n", dccp_packet_name(dh->dccph_type)); return 1; |