[PATCH net-next 3/8] sctp: Change sctp to implement csum_levels
From: Tom Herbert <hidden>
Date: 2014-08-26 01:03:18
Subsystem:
networking [general], sctp protocol, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Marcelo Ricardo Leitner, Xin Long, Linus Torvalds
CHECKSUM_UNNECESSARY may be applied to the SCTP CRC so we need to appropriate account for this by decrementing csum_level. This is done by calling __skb_dec_checksum_unnecessary. Signed-off-by: Tom Herbert <redacted> --- net/sctp/input.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/net/sctp/input.c b/net/sctp/input.c
index c1b9912..c86b86c 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c@@ -133,9 +133,13 @@ int sctp_rcv(struct sk_buff *skb) __skb_pull(skb, skb_transport_offset(skb)); if (skb->len < sizeof(struct sctphdr)) goto discard_it; - if (!sctp_checksum_disable && !skb_csum_unnecessary(skb) && - sctp_rcv_checksum(net, skb) < 0) + + skb->csum_valid = 0; /* Previous value not applicable */ + if (skb_csum_unnecessary(skb)) + __skb_dec_checksum_unnecessary(skb); + else if (!sctp_checksum_disable && sctp_rcv_checksum(net, skb) < 0) goto discard_it; + skb->csum_valid = 1; skb_pull(skb, sizeof(struct sctphdr));
--
2.1.0.rc2.206.gedb03e5