Marcelo Ricardo Leitner 1f45f78f8e sctp: allow GSO frags to access the chunk too ... SCTP will try to access original IP headers on sctp_recvmsg in order to copy the addresses used. There are also other places that do similar access to IP or even SCTP headers. But after 90017accff ("sctp: Add GSO support") they aren't always there because they are only present in the header skb. SCTP handles the queueing of incoming data by cloning the incoming skb and limiting to only the relevant payload. This clone has its cb updated to something different and it's then queued on socket rx queue. Thus we need to fix this in two moments. For rx path, not related to socket queue yet, this patch uses a partially copied sctp_input_cb to such GSO frags. This restores the ability to access the headers for this part of the code. Regarding the socket rx queue, it removes iif member from sctp_event and also add a chunk pointer on it. With these changes we're always able to reach the headers again. The biggest change here is that now the sctp_chunk struct and the original skb are only freed after the application consumed the buffer. Note however that the original payload was already like this due to the skb cloning. For iif, SCTP's IPv4 code doesn't use it, so no change is necessary. IPv6 now can fetch it directly from original's IPv6 CB as the original skb is still accessible. In the future we probably can simplify sctp_v*_skb_iif() stuff, as sctp_v4_skb_iif() was called but it's return value not used, and now it's not even called, but such cleanup is out of scope for this change. Fixes: 90017accff ("sctp: Add GSO support") Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-07-13 18:10:14 -07:00
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auth.h	sctp: Use shash	2016-01-27 20:36:15 +08:00
checksum.h
command.h
constants.h
sctp.h	sctp: Add GSO support	2016-06-03 19:37:21 -04:00
sm.h	sctp: allow sctp_transmit_packet and others to use gfp	2016-03-13 22:29:07 -04:00
structs.h	sctp: allow GSO frags to access the chunk too	2016-07-13 18:10:14 -07:00
tsnmap.h
ulpevent.h	sctp: allow GSO frags to access the chunk too	2016-07-13 18:10:14 -07:00
ulpqueue.h