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-rw-r--r--include/linux/sctp.h27
-rw-r--r--include/net/sctp/sm.h5
-rw-r--r--include/net/sctp/structs.h3
-rw-r--r--net/sctp/associola.c1
-rw-r--r--net/sctp/sm_make_chunk.c121
5 files changed, 156 insertions, 1 deletions
diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index fcb4c3646173..a9e790685af3 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -108,6 +108,7 @@ typedef enum {
/* Use hex, as defined in ADDIP sec. 3.1 */
SCTP_CID_ASCONF = 0xC1,
SCTP_CID_ASCONF_ACK = 0x80,
+ SCTP_CID_RECONF = 0x82,
} sctp_cid_t; /* enum */
@@ -199,6 +200,13 @@ typedef enum {
SCTP_PARAM_SUCCESS_REPORT = cpu_to_be16(0xc005),
SCTP_PARAM_ADAPTATION_LAYER_IND = cpu_to_be16(0xc006),
+ /* RE-CONFIG. Section 4 */
+ SCTP_PARAM_RESET_OUT_REQUEST = cpu_to_be16(0x000d),
+ SCTP_PARAM_RESET_IN_REQUEST = cpu_to_be16(0x000e),
+ SCTP_PARAM_RESET_TSN_REQUEST = cpu_to_be16(0x000f),
+ SCTP_PARAM_RESET_RESPONSE = cpu_to_be16(0x0010),
+ SCTP_PARAM_RESET_ADD_OUT_STREAMS = cpu_to_be16(0x0011),
+ SCTP_PARAM_RESET_ADD_IN_STREAMS = cpu_to_be16(0x0012),
} sctp_param_t; /* enum */
@@ -710,4 +718,23 @@ struct sctp_infox {
struct sctp_association *asoc;
};
+struct sctp_reconf_chunk {
+ sctp_chunkhdr_t chunk_hdr;
+ __u8 params[0];
+} __packed;
+
+struct sctp_strreset_outreq {
+ sctp_paramhdr_t param_hdr;
+ __u32 request_seq;
+ __u32 response_seq;
+ __u32 send_reset_at_tsn;
+ __u16 list_of_streams[0];
+} __packed;
+
+struct sctp_strreset_inreq {
+ sctp_paramhdr_t param_hdr;
+ __u32 request_seq;
+ __u16 list_of_streams[0];
+} __packed;
+
#endif /* __LINUX_SCTP_H__ */
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index ca6c971dd74a..3462cb08f51a 100644
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -259,7 +259,10 @@ struct sctp_chunk *sctp_make_fwdtsn(const struct sctp_association *asoc,
__u32 new_cum_tsn, size_t nstreams,
struct sctp_fwdtsn_skip *skiplist);
struct sctp_chunk *sctp_make_auth(const struct sctp_association *asoc);
-
+struct sctp_chunk *sctp_make_strreset_req(
+ const struct sctp_association *asoc,
+ __u16 stream_num, __u16 *stream_list,
+ bool out, bool in);
void sctp_chunk_assign_tsn(struct sctp_chunk *);
void sctp_chunk_assign_ssn(struct sctp_chunk *);
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 4741ec240caf..3dc983e97564 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -1865,6 +1865,9 @@ struct sctp_association {
temp:1, /* Is it a temporary association? */
prsctp_enable:1;
+ __u32 strreset_outseq; /* Update after receiving response */
+ __u32 strreset_inseq; /* Update after receiving request */
+
struct sctp_priv_assoc_stats stats;
int sent_cnt_removable;
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 36294f7fb9a7..42ece6f35b98 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -207,6 +207,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
* association to the same value as the initial TSN.
*/
asoc->addip_serial = asoc->c.initial_tsn;
+ asoc->strreset_outseq = asoc->c.initial_tsn;
INIT_LIST_HEAD(&asoc->addip_chunk_list);
INIT_LIST_HEAD(&asoc->asconf_ack_list);
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 80a9088084ac..df81fce08890 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1844,6 +1844,7 @@ no_hmac:
retval->next_tsn = retval->c.initial_tsn;
retval->ctsn_ack_point = retval->next_tsn - 1;
retval->addip_serial = retval->c.initial_tsn;
+ retval->strreset_outseq = retval->c.initial_tsn;
retval->adv_peer_ack_point = retval->ctsn_ack_point;
retval->peer.prsctp_capable = retval->c.prsctp_capable;
retval->peer.adaptation_ind = retval->c.adaptation_ind;
@@ -2387,6 +2388,8 @@ int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk,
asoc->peer.i.initial_tsn =
ntohl(peer_init->init_hdr.initial_tsn);
+ asoc->strreset_inseq = asoc->peer.i.initial_tsn;
+
/* Apply the upper bounds for output streams based on peer's
* number of inbound streams.
*/
@@ -3524,3 +3527,121 @@ struct sctp_chunk *sctp_make_fwdtsn(const struct sctp_association *asoc,
return retval;
}
+
+/* RE-CONFIG 3.1 (RE-CONFIG chunk)
+ * 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
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Type = 130 | Chunk Flags | Chunk Length |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * \ \
+ * / Re-configuration Parameter /
+ * \ \
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * \ \
+ * / Re-configuration Parameter (optional) /
+ * \ \
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+static struct sctp_chunk *sctp_make_reconf(
+ const struct sctp_association *asoc,
+ int length)
+{
+ struct sctp_reconf_chunk *reconf;
+ struct sctp_chunk *retval;
+
+ retval = sctp_make_control(asoc, SCTP_CID_RECONF, 0, length,
+ GFP_ATOMIC);
+ if (!retval)
+ return NULL;
+
+ reconf = (struct sctp_reconf_chunk *)retval->chunk_hdr;
+ retval->param_hdr.v = reconf->params;
+
+ return retval;
+}
+
+/* RE-CONFIG 4.1 (STREAM OUT RESET)
+ * 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 = 13 | Parameter Length = 16 + 2 * N |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Re-configuration Request Sequence Number |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Re-configuration Response Sequence Number |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Sender's Last Assigned TSN |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Stream Number 1 (optional) | Stream Number 2 (optional) |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * / ...... /
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Stream Number N-1 (optional) | Stream Number N (optional) |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * RE-CONFIG 4.2 (STREAM IN RESET)
+ * 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 = 14 | Parameter Length = 8 + 2 * N |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Re-configuration Request Sequence Number |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Stream Number 1 (optional) | Stream Number 2 (optional) |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * / ...... /
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Stream Number N-1 (optional) | Stream Number N (optional) |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+struct sctp_chunk *sctp_make_strreset_req(
+ const struct sctp_association *asoc,
+ __u16 stream_num, __u16 *stream_list,
+ bool out, bool in)
+{
+ struct sctp_strreset_outreq outreq;
+ __u16 stream_len = stream_num * 2;
+ struct sctp_strreset_inreq inreq;
+ struct sctp_chunk *retval;
+ __u16 outlen, inlen, i;
+
+ outlen = (sizeof(outreq) + stream_len) * out;
+ inlen = (sizeof(inreq) + stream_len) * in;
+
+ retval = sctp_make_reconf(asoc, outlen + inlen);
+ if (!retval)
+ return NULL;
+
+ for (i = 0; i < stream_num; i++)
+ stream_list[i] = htons(stream_list[i]);
+
+ if (outlen) {
+ outreq.param_hdr.type = SCTP_PARAM_RESET_OUT_REQUEST;
+ outreq.param_hdr.length = htons(outlen);
+ outreq.request_seq = htonl(asoc->strreset_outseq);
+ outreq.response_seq = htonl(asoc->strreset_inseq - 1);
+ outreq.send_reset_at_tsn = htonl(asoc->next_tsn - 1);
+
+ sctp_addto_chunk(retval, sizeof(outreq), &outreq);
+
+ if (stream_len)
+ sctp_addto_chunk(retval, stream_len, stream_list);
+ }
+
+ if (inlen) {
+ inreq.param_hdr.type = SCTP_PARAM_RESET_IN_REQUEST;
+ inreq.param_hdr.length = htons(inlen);
+ inreq.request_seq = htonl(asoc->strreset_outseq + out);
+
+ sctp_addto_chunk(retval, sizeof(inreq), &inreq);
+
+ if (stream_len)
+ sctp_addto_chunk(retval, stream_len, stream_list);
+ }
+
+ for (i = 0; i < stream_num; i++)
+ stream_list[i] = ntohs(stream_list[i]);
+
+ return retval;
+}
generated by cgit (git 2.34.1) at 2024-06-28 01:43:12 +0000