Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit bd4b9f8b authored by Xin Long's avatar Xin Long Committed by David S. Miller
Browse files

sctp: add support for generating stream reconf resp chunk



This patch is to define Re-configuration Response Parameter described
in rfc6525 section 4.4. As optional fields are only for SSN/TSN Reset
Request Parameter, it uses another function to make that.

Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 61845d20
Loading
Loading
Loading
Loading
+24 −0
Original line number Diff line number Diff line
@@ -749,4 +749,28 @@ struct sctp_strreset_addstrm {
	__u16 reserved;
};

enum {
	SCTP_STRRESET_NOTHING_TO_DO	= 0x00,
	SCTP_STRRESET_PERFORMED		= 0x01,
	SCTP_STRRESET_DENIED		= 0x02,
	SCTP_STRRESET_ERR_WRONG_SSN	= 0x03,
	SCTP_STRRESET_ERR_IN_PROGRESS	= 0x04,
	SCTP_STRRESET_ERR_BAD_SEQNO	= 0x05,
	SCTP_STRRESET_IN_PROGRESS	= 0x06,
};

struct sctp_strreset_resp {
	sctp_paramhdr_t param_hdr;
	__u32 response_seq;
	__u32 result;
};

struct sctp_strreset_resptsn {
	sctp_paramhdr_t param_hdr;
	__u32 response_seq;
	__u32 result;
	__u32 senders_next_tsn;
	__u32 receivers_next_tsn;
};

#endif /* __LINUX_SCTP_H__ */
+7 −0
Original line number Diff line number Diff line
@@ -270,6 +270,13 @@ struct sctp_chunk *sctp_make_strreset_tsnreq(
struct sctp_chunk *sctp_make_strreset_addstrm(
				const struct sctp_association *asoc,
				__u16 out, __u16 in);
struct sctp_chunk *sctp_make_strreset_resp(
				const struct sctp_association *asoc,
				__u32 result, __u32 sn);
struct sctp_chunk *sctp_make_strreset_tsnresp(
				struct sctp_association *asoc,
				__u32 result, __u32 sn,
				__u32 sender_tsn, __u32 receiver_tsn);
void sctp_chunk_assign_tsn(struct sctp_chunk *);
void sctp_chunk_assign_ssn(struct sctp_chunk *);

+74 −0
Original line number Diff line number Diff line
@@ -3733,3 +3733,77 @@ struct sctp_chunk *sctp_make_strreset_addstrm(

	return retval;
}

/* RE-CONFIG 4.4 (RESP)
 *   0                   1                   2                   3
 *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |     Parameter Type = 16       |      Parameter Length         |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |         Re-configuration Response Sequence Number             |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                            Result                             |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 */
struct sctp_chunk *sctp_make_strreset_resp(
				const struct sctp_association *asoc,
				__u32 result, __u32 sn)
{
	struct sctp_strreset_resp resp;
	__u16 length = sizeof(resp);
	struct sctp_chunk *retval;

	retval = sctp_make_reconf(asoc, length);
	if (!retval)
		return NULL;

	resp.param_hdr.type = SCTP_PARAM_RESET_RESPONSE;
	resp.param_hdr.length = htons(length);
	resp.response_seq = htonl(sn);
	resp.result = htonl(result);

	sctp_addto_chunk(retval, sizeof(resp), &resp);

	return retval;
}

/* RE-CONFIG 4.4 OPTIONAL (TSNRESP)
 *   0                   1                   2                   3
 *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |     Parameter Type = 16       |      Parameter Length         |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |         Re-configuration Response Sequence Number             |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                            Result                             |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                   Sender's Next TSN (optional)                |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |                  Receiver's Next TSN (optional)               |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 */
struct sctp_chunk *sctp_make_strreset_tsnresp(
					struct sctp_association *asoc,
					__u32 result, __u32 sn,
					__u32 sender_tsn, __u32 receiver_tsn)
{
	struct sctp_strreset_resptsn tsnresp;
	__u16 length = sizeof(tsnresp);
	struct sctp_chunk *retval;

	retval = sctp_make_reconf(asoc, length);
	if (!retval)
		return NULL;

	tsnresp.param_hdr.type = SCTP_PARAM_RESET_RESPONSE;
	tsnresp.param_hdr.length = htons(length);

	tsnresp.response_seq = htonl(sn);
	tsnresp.result = htonl(result);
	tsnresp.senders_next_tsn = htonl(sender_tsn);
	tsnresp.receivers_next_tsn = htonl(receiver_tsn);

	sctp_addto_chunk(retval, sizeof(tsnresp), &tsnresp);

	return retval;
}