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| author | Geir Ola Vaagland <geirola@gmail.com> | 2014-07-12 20:30:37 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-07-16 23:40:03 +0200 |
| commit | 0d3a421d284812d07970b4ccee74d4fa38737e4d (patch) | |
| tree | c9d97227606c9682671e8d9e7d2ebfc727416c31 /include/net/sctp/ulpevent.h | |
| parent | net: sctp: implement rfc6458, 5.3.4. SCTP_SNDINFO cmsg support (diff) | |
| download | linux-0d3a421d284812d07970b4ccee74d4fa38737e4d.tar.xz linux-0d3a421d284812d07970b4ccee74d4fa38737e4d.zip | |
net: sctp: implement rfc6458, 5.3.5. SCTP_RCVINFO cmsg support
This patch implements section 5.3.5. of RFC6458, that is, support
for 'SCTP Receive Information Structure' (SCTP_RCVINFO) which is
placed into ancillary data cmsghdr structure for each recvmsg()
call.
This option can be enabled/disabled via setsockopt(2) on SOL_SCTP
level by setting an int value with 1/0 for SCTP_RECVRCVINFO in user
space applications as per RFC6458, section 8.1.29.
The sctp_rcvinfo structure is defined as per RFC as below ...
struct sctp_rcvinfo {
uint16_t rcv_sid;
uint16_t rcv_ssn;
uint16_t rcv_flags;
<-- 2 bytes hole -->
uint32_t rcv_ppid;
uint32_t rcv_tsn;
uint32_t rcv_cumtsn;
uint32_t rcv_context;
sctp_assoc_t rcv_assoc_id;
};
... and provided under cmsg_level IPPROTO_SCTP, cmsg_type
SCTP_RCVINFO, while cmsg_data[] contains struct sctp_rcvinfo.
An sctp_rcvinfo item always corresponds to the data in msg_iov.
Joint work with Daniel Borkmann.
Signed-off-by: Geir Ola Vaagland <geirola@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sctp/ulpevent.h')
| -rw-r--r-- | include/net/sctp/ulpevent.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/net/sctp/ulpevent.h b/include/net/sctp/ulpevent.h index daacb32b55b5..e8095f973e94 100644 --- a/include/net/sctp/ulpevent.h +++ b/include/net/sctp/ulpevent.h @@ -129,7 +129,10 @@ struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event( const struct sctp_association *asoc, gfp_t gfp); void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event, - struct msghdr *); + struct msghdr *); +void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event, + struct msghdr *); + __u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event); /* Is this event type enabled? */ |