diff options
author | Geir Ola Vaagland <geirola@gmail.com> | 2014-07-12 14:30:38 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2014-07-16 17:40:03 -0400 |
commit | 2347c80ff127b94ddaa675e2b78ab4cef46dc905 (patch) | |
tree | 5fe57c8b7814f629cb773bbea0c1a9f8eba035d0 /include/net/sctp/structs.h | |
parent | 0d3a421d284812d07970b4ccee74d4fa38737e4d (diff) |
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 { | |||
218 | __u32 adaptation_ind; | 218 | __u32 adaptation_ind; |
219 | __u32 pd_point; | 219 | __u32 pd_point; |
220 | __u8 recvrcvinfo; | 220 | __u8 recvrcvinfo; |
221 | __u8 recvnxtinfo; | ||
221 | 222 | ||
222 | atomic_t pd_mode; | 223 | atomic_t pd_mode; |
223 | /* Receive to here while partial delivery is in effect. */ | 224 | /* Receive to here while partial delivery is in effect. */ |