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sctp: implement sender-side procedures for SSN Reset Request Parameter

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This patch is to implement sender-side procedures for the Outgoing
and Incoming SSN Reset Request Parameter described in rfc6525 section
5.1.2 and 5.1.3.

It is also add sockopt SCTP_RESET_STREAMS in rfc6525 section 6.3.2
for users.

Note that the new asoc member strreset_outstanding is to make sure
only one reconf request chunk on the fly as rfc6525 section 5.1.1
demands.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long
2017-01-18 00:44:47 +08:00
committed by David S. Miller
parent 9fb657aec0
commit 7f9d68ac94
6 changed files with 149 additions and 10 deletions
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11
include/uapi/linux/sctp.h
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@@ -116,6 +116,7 @@ typedef __s32 sctp_assoc_t;
#define SCTP_DEFAULT_PRINFO 114
#define SCTP_PR_ASSOC_STATUS 115
#define SCTP_ENABLE_STREAM_RESET 118
#define SCTP_RESET_STREAMS 119
/* PR-SCTP policies */
#define SCTP_PR_SCTP_NONE 0x0000
@@ -145,6 +146,9 @@ typedef __s32 sctp_assoc_t;
#define SCTP_ENABLE_CHANGE_ASSOC_REQ 0x04
#define SCTP_ENABLE_STRRESET_MASK 0x07
#define SCTP_STREAM_RESET_INCOMING 0x01
#define SCTP_STREAM_RESET_OUTGOING 0x02
/* These are bit fields for msghdr->msg_flags. See section 5.1. */
/* On user space Linux, these live in <bits/socket.h> as an enum. */
enum sctp_msg_flags {
@@ -1015,4 +1019,11 @@ struct sctp_info {
__u32 __reserved3;
};
struct sctp_reset_streams {
sctp_assoc_t srs_assoc_id;
uint16_t srs_flags;
uint16_t srs_number_streams; /* 0 == ALL */
uint16_t srs_stream_list[]; /* list if srs_num_streams is not 0 */
};
#endif /* _UAPI_SCTP_H */