From a5a35e76753d27e782028843a5186f176b50dd16 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Fri, 23 Mar 2007 11:34:08 -0700 Subject: [SCTP]: Implement sac_info field in SCTP_ASSOC_CHANGE notification. As stated in the sctp socket api draft: sac_info: variable If the sac_state is SCTP_COMM_LOST and an ABORT chunk was received for this association, sac_info[] contains the complete ABORT chunk as defined in the SCTP specification RFC2960 [RFC2960] section 3.3.7. We now save received ABORT chunks into the sac_info field and pass that to the user. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/sctp/ulpevent.c | 49 ++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 42 insertions(+), 7 deletions(-) (limited to 'net/sctp/ulpevent.c') diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c index 2e11bc8d5d35..661ea2dd78ba 100644 --- a/net/sctp/ulpevent.c +++ b/net/sctp/ulpevent.c @@ -131,19 +131,54 @@ static inline void sctp_ulpevent_release_owner(struct sctp_ulpevent *event) struct sctp_ulpevent *sctp_ulpevent_make_assoc_change( const struct sctp_association *asoc, __u16 flags, __u16 state, __u16 error, __u16 outbound, - __u16 inbound, gfp_t gfp) + __u16 inbound, struct sctp_chunk *chunk, gfp_t gfp) { struct sctp_ulpevent *event; struct sctp_assoc_change *sac; struct sk_buff *skb; - event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change), + /* If the lower layer passed in the chunk, it will be + * an ABORT, so we need to include it in the sac_info. + */ + if (chunk) { + /* sctp_inqu_pop() has allready pulled off the chunk + * header. We need to put it back temporarily + */ + skb_push(chunk->skb, sizeof(sctp_chunkhdr_t)); + + /* Copy the chunk data to a new skb and reserve enough + * head room to use as notification. + */ + skb = skb_copy_expand(chunk->skb, + sizeof(struct sctp_assoc_change), 0, gfp); + + if (!skb) + goto fail; + + /* put back the chunk header now that we have a copy */ + skb_pull(chunk->skb, sizeof(sctp_chunkhdr_t)); + + /* Embed the event fields inside the cloned skb. */ + event = sctp_skb2event(skb); + sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize); + + /* Include the notification structure */ + sac = (struct sctp_assoc_change *) + skb_push(skb, sizeof(struct sctp_assoc_change)); + + /* Trim the buffer to the right length. */ + skb_trim(skb, sizeof(struct sctp_assoc_change) + + ntohs(chunk->chunk_hdr->length)); + } else { + event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change), MSG_NOTIFICATION, gfp); - if (!event) - goto fail; - skb = sctp_event2skb(event); - sac = (struct sctp_assoc_change *) - skb_put(skb, sizeof(struct sctp_assoc_change)); + if (!event) + goto fail; + + skb = sctp_event2skb(event); + sac = (struct sctp_assoc_change *) skb_put(skb, + sizeof(struct sctp_assoc_change)); + } /* Socket Extensions for SCTP * 5.3.1.1 SCTP_ASSOC_CHANGE -- cgit v1.2.3