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| author | Geir Ola Vaagland <geirola@gmail.com> | 2014-07-12 22:30:38 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-07-17 01:40:03 +0400 |
| commit | 2347c80ff127b94ddaa675e2b78ab4cef46dc905 (patch) | |
| tree | 5fe57c8b7814f629cb773bbea0c1a9f8eba035d0 /include/net/sctp/structs.h | |
| parent | 0d3a421d284812d07970b4ccee74d4fa38737e4d (diff) | |
| download | linux-2347c80ff127b94ddaa675e2b78ab4cef46dc905.tar.xz | |
net: sctp: implement rfc6458, 5.3.6. SCTP_NXTINFO cmsg support
This patch implements section 5.3.6. of RFC6458, that is, support
for 'SCTP Next Receive Information Structure' (SCTP_NXTINFO) which
is placed into ancillary data cmsghdr structure for each recvmsg()
call, if this information is already available when delivering the
current message.
This option can be enabled/disabled via setsockopt(2) on SOL_SCTP
level by setting an int value with 1/0 for SCTP_RECVNXTINFO in
user space applications as per RFC6458, section 8.1.30.
The sctp_nxtinfo structure is defined as per RFC as below ...
struct sctp_nxtinfo {
uint16_t nxt_sid;
uint16_t nxt_flags;
uint32_t nxt_ppid;
uint32_t nxt_length;
sctp_assoc_t nxt_assoc_id;
};
... and provided under cmsg_level IPPROTO_SCTP, cmsg_type
SCTP_NXTINFO, while cmsg_data[] contains struct sctp_nxtinfo.
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/structs.h')
| -rw-r--r-- | include/net/sctp/structs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 11d5df015370..7741d1b66967 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -218,6 +218,7 @@ struct sctp_sock { __u32 adaptation_ind; __u32 pd_point; __u8 recvrcvinfo; + __u8 recvnxtinfo; atomic_t pd_mode; /* Receive to here while partial delivery is in effect. */ |