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Diffstat (limited to 'net/sctp/sm_make_chunk.c')
-rw-r--r--net/sctp/sm_make_chunk.c476
1 files changed, 398 insertions, 78 deletions
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 9e9690b7afe1..6110447fe51d 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -217,7 +217,7 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
{
struct net *net = sock_net(asoc->base.sk);
struct sctp_endpoint *ep = asoc->ep;
- sctp_inithdr_t init;
+ struct sctp_inithdr init;
union sctp_params addrs;
size_t chunksize;
struct sctp_chunk *retval = NULL;
@@ -228,8 +228,8 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
sctp_adaptation_ind_param_t aiparam;
sctp_supported_ext_param_t ext_param;
int num_ext = 0;
- __u8 extensions[3];
- sctp_paramhdr_t *auth_chunks = NULL,
+ __u8 extensions[4];
+ struct sctp_paramhdr *auth_chunks = NULL,
*auth_hmacs = NULL;
/* RFC 2960 3.3.2 Initiation (INIT) (1)
@@ -270,6 +270,11 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
num_ext += 2;
}
+ if (asoc->reconf_enable) {
+ extensions[num_ext] = SCTP_CID_RECONF;
+ num_ext += 1;
+ }
+
if (sp->adaptation_ind)
chunksize += sizeof(aiparam);
@@ -281,14 +286,14 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
chunksize += sizeof(asoc->c.auth_random);
/* Add HMACS parameter length if any were defined */
- auth_hmacs = (sctp_paramhdr_t *)asoc->c.auth_hmacs;
+ auth_hmacs = (struct sctp_paramhdr *)asoc->c.auth_hmacs;
if (auth_hmacs->length)
chunksize += SCTP_PAD4(ntohs(auth_hmacs->length));
else
auth_hmacs = NULL;
/* Add CHUNKS parameter length */
- auth_chunks = (sctp_paramhdr_t *)asoc->c.auth_chunks;
+ auth_chunks = (struct sctp_paramhdr *)asoc->c.auth_chunks;
if (auth_chunks->length)
chunksize += SCTP_PAD4(ntohs(auth_chunks->length));
else
@@ -380,7 +385,7 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
const struct sctp_chunk *chunk,
gfp_t gfp, int unkparam_len)
{
- sctp_inithdr_t initack;
+ struct sctp_inithdr initack;
struct sctp_chunk *retval;
union sctp_params addrs;
struct sctp_sock *sp;
@@ -391,8 +396,8 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
sctp_adaptation_ind_param_t aiparam;
sctp_supported_ext_param_t ext_param;
int num_ext = 0;
- __u8 extensions[3];
- sctp_paramhdr_t *auth_chunks = NULL,
+ __u8 extensions[4];
+ struct sctp_paramhdr *auth_chunks = NULL,
*auth_hmacs = NULL,
*auth_random = NULL;
@@ -434,20 +439,25 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
num_ext += 2;
}
+ if (asoc->peer.reconf_capable) {
+ extensions[num_ext] = SCTP_CID_RECONF;
+ num_ext += 1;
+ }
+
if (sp->adaptation_ind)
chunksize += sizeof(aiparam);
if (asoc->peer.auth_capable) {
- auth_random = (sctp_paramhdr_t *)asoc->c.auth_random;
+ auth_random = (struct sctp_paramhdr *)asoc->c.auth_random;
chunksize += ntohs(auth_random->length);
- auth_hmacs = (sctp_paramhdr_t *)asoc->c.auth_hmacs;
+ auth_hmacs = (struct sctp_paramhdr *)asoc->c.auth_hmacs;
if (auth_hmacs->length)
chunksize += SCTP_PAD4(ntohs(auth_hmacs->length));
else
auth_hmacs = NULL;
- auth_chunks = (sctp_paramhdr_t *)asoc->c.auth_chunks;
+ auth_chunks = (struct sctp_paramhdr *)asoc->c.auth_chunks;
if (auth_chunks->length)
chunksize += SCTP_PAD4(ntohs(auth_chunks->length));
else
@@ -1075,18 +1085,18 @@ struct sctp_chunk *sctp_make_abort_violation(
struct sctp_chunk *retval;
struct sctp_paramhdr phdr;
- retval = sctp_make_abort(asoc, chunk, sizeof(sctp_errhdr_t) + paylen
- + sizeof(sctp_paramhdr_t));
+ retval = sctp_make_abort(asoc, chunk, sizeof(sctp_errhdr_t) + paylen +
+ sizeof(phdr));
if (!retval)
goto end;
- sctp_init_cause(retval, SCTP_ERROR_PROTO_VIOLATION, paylen
- + sizeof(sctp_paramhdr_t));
+ sctp_init_cause(retval, SCTP_ERROR_PROTO_VIOLATION, paylen +
+ sizeof(phdr));
phdr.type = htons(chunk->chunk_hdr->type);
phdr.length = chunk->chunk_hdr->length;
sctp_addto_chunk(retval, paylen, payload);
- sctp_addto_param(retval, sizeof(sctp_paramhdr_t), &phdr);
+ sctp_addto_param(retval, sizeof(phdr), &phdr);
end:
return retval;
@@ -1100,16 +1110,16 @@ struct sctp_chunk *sctp_make_violation_paramlen(
struct sctp_chunk *retval;
static const char error[] = "The following parameter had invalid length:";
size_t payload_len = sizeof(error) + sizeof(sctp_errhdr_t) +
- sizeof(sctp_paramhdr_t);
+ sizeof(*param);
retval = sctp_make_abort(asoc, chunk, payload_len);
if (!retval)
goto nodata;
sctp_init_cause(retval, SCTP_ERROR_PROTO_VIOLATION,
- sizeof(error) + sizeof(sctp_paramhdr_t));
+ sizeof(error) + sizeof(*param));
sctp_addto_chunk(retval, sizeof(error), error);
- sctp_addto_param(retval, sizeof(sctp_paramhdr_t), param);
+ sctp_addto_param(retval, sizeof(*param), param);
nodata:
return retval;
@@ -1286,8 +1296,7 @@ struct sctp_chunk *sctp_make_auth(const struct sctp_association *asoc)
retval->subh.auth_hdr = sctp_addto_chunk(retval, sizeof(sctp_authhdr_t),
&auth_hdr);
- hmac = skb_put(retval->skb, hmac_desc->hmac_len);
- memset(hmac, 0, hmac_desc->hmac_len);
+ hmac = skb_put_zero(retval->skb, hmac_desc->hmac_len);
/* Adjust the chunk header to include the empty MAC */
retval->chunk_hdr->length =
@@ -1336,7 +1345,7 @@ struct sctp_chunk *sctp_chunkify(struct sk_buff *skb,
INIT_LIST_HEAD(&retval->transmitted_list);
INIT_LIST_HEAD(&retval->frag_list);
SCTP_DBG_OBJCNT_INC(chunk);
- atomic_set(&retval->refcnt, 1);
+ refcount_set(&retval->refcnt, 1);
nodata:
return retval;
@@ -1370,20 +1379,20 @@ static struct sctp_chunk *_sctp_make_chunk(const struct sctp_association *asoc,
gfp_t gfp)
{
struct sctp_chunk *retval;
- sctp_chunkhdr_t *chunk_hdr;
+ struct sctp_chunkhdr *chunk_hdr;
struct sk_buff *skb;
struct sock *sk;
/* No need to allocate LL here, as this is only a chunk. */
- skb = alloc_skb(SCTP_PAD4(sizeof(sctp_chunkhdr_t) + paylen), gfp);
+ skb = alloc_skb(SCTP_PAD4(sizeof(*chunk_hdr) + paylen), gfp);
if (!skb)
goto nodata;
/* Make room for the chunk header. */
- chunk_hdr = (sctp_chunkhdr_t *)skb_put(skb, sizeof(sctp_chunkhdr_t));
+ chunk_hdr = (struct sctp_chunkhdr *)skb_put(skb, sizeof(*chunk_hdr));
chunk_hdr->type = type;
chunk_hdr->flags = flags;
- chunk_hdr->length = htons(sizeof(sctp_chunkhdr_t));
+ chunk_hdr->length = htons(sizeof(*chunk_hdr));
sk = asoc ? asoc->base.sk : NULL;
retval = sctp_chunkify(skb, asoc, sk, gfp);
@@ -1393,7 +1402,7 @@ static struct sctp_chunk *_sctp_make_chunk(const struct sctp_association *asoc,
}
retval->chunk_hdr = chunk_hdr;
- retval->chunk_end = ((__u8 *)chunk_hdr) + sizeof(struct sctp_chunkhdr);
+ retval->chunk_end = ((__u8 *)chunk_hdr) + sizeof(*chunk_hdr);
/* Determine if the chunk needs to be authenticated */
if (sctp_auth_send_cid(type, asoc))
@@ -1449,13 +1458,13 @@ void sctp_chunk_free(struct sctp_chunk *chunk)
/* Grab a reference to the chunk. */
void sctp_chunk_hold(struct sctp_chunk *ch)
{
- atomic_inc(&ch->refcnt);
+ refcount_inc(&ch->refcnt);
}
/* Release a reference to the chunk. */
void sctp_chunk_put(struct sctp_chunk *ch)
{
- if (atomic_dec_and_test(&ch->refcnt))
+ if (refcount_dec_and_test(&ch->refcnt))
sctp_chunk_destroy(ch);
}
@@ -1465,15 +1474,11 @@ void sctp_chunk_put(struct sctp_chunk *ch)
void *sctp_addto_chunk(struct sctp_chunk *chunk, int len, const void *data)
{
void *target;
- void *padding;
int chunklen = ntohs(chunk->chunk_hdr->length);
int padlen = SCTP_PAD4(chunklen) - chunklen;
- padding = skb_put(chunk->skb, padlen);
- target = skb_put(chunk->skb, len);
-
- memset(padding, 0, padlen);
- memcpy(target, data, len);
+ skb_put_zero(chunk->skb, padlen);
+ target = skb_put_data(chunk->skb, data, len);
/* Adjust the chunk length field. */
chunk->chunk_hdr->length = htons(chunklen + padlen + len);
@@ -1502,14 +1507,12 @@ int sctp_user_addto_chunk(struct sctp_chunk *chunk, int len,
struct iov_iter *from)
{
void *target;
- ssize_t copied;
/* Make room in chunk for data. */
target = skb_put(chunk->skb, len);
/* Copy data (whole iovec) into chunk */
- copied = copy_from_iter(target, len, from);
- if (copied != len)
+ if (!copy_from_iter_full(target, len, from))
return -EFAULT;
/* Adjust the chunk length field. */
@@ -1536,7 +1539,7 @@ void sctp_chunk_assign_ssn(struct sctp_chunk *chunk)
/* All fragments will be on the same stream */
sid = ntohs(chunk->subh.data_hdr->stream);
- stream = &chunk->asoc->ssnmap->out;
+ stream = &chunk->asoc->stream;
/* Now assign the sequence number to the entire message.
* All fragments must have the same stream sequence number.
@@ -1547,9 +1550,9 @@ void sctp_chunk_assign_ssn(struct sctp_chunk *chunk)
ssn = 0;
} else {
if (lchunk->chunk_hdr->flags & SCTP_DATA_LAST_FRAG)
- ssn = sctp_ssn_next(stream, sid);
+ ssn = sctp_ssn_next(stream, out, sid);
else
- ssn = sctp_ssn_peek(stream, sid);
+ ssn = sctp_ssn_peek(stream, out, sid);
}
lchunk->subh.data_hdr->ssn = htons(ssn);
@@ -1611,7 +1614,7 @@ static sctp_cookie_param_t *sctp_pack_cookie(const struct sctp_endpoint *ep,
/* Header size is static data prior to the actual cookie, including
* any padding.
*/
- headersize = sizeof(sctp_paramhdr_t) +
+ headersize = sizeof(struct sctp_paramhdr) +
(sizeof(struct sctp_signed_cookie) -
sizeof(struct sctp_cookie));
bodysize = sizeof(struct sctp_cookie)
@@ -1707,7 +1710,7 @@ struct sctp_association *sctp_unpack_cookie(
/* Header size is static data prior to the actual cookie, including
* any padding.
*/
- headersize = sizeof(sctp_chunkhdr_t) +
+ headersize = sizeof(struct sctp_chunkhdr) +
(sizeof(struct sctp_signed_cookie) -
sizeof(struct sctp_cookie));
bodysize = ntohs(chunk->chunk_hdr->length) - headersize;
@@ -1844,6 +1847,7 @@ 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;
@@ -1878,7 +1882,7 @@ struct __sctp_missing {
* Report a missing mandatory parameter.
*/
static int sctp_process_missing_param(const struct sctp_association *asoc,
- sctp_param_t paramtype,
+ enum sctp_param paramtype,
struct sctp_chunk *chunk,
struct sctp_chunk **errp)
{
@@ -1971,7 +1975,7 @@ static int sctp_process_hn_param(const struct sctp_association *asoc,
static int sctp_verify_ext_param(struct net *net, union sctp_params param)
{
- __u16 num_ext = ntohs(param.p->length) - sizeof(sctp_paramhdr_t);
+ __u16 num_ext = ntohs(param.p->length) - sizeof(struct sctp_paramhdr);
int have_auth = 0;
int have_asconf = 0;
int i;
@@ -2006,11 +2010,16 @@ static void sctp_process_ext_param(struct sctp_association *asoc,
union sctp_params param)
{
struct net *net = sock_net(asoc->base.sk);
- __u16 num_ext = ntohs(param.p->length) - sizeof(sctp_paramhdr_t);
+ __u16 num_ext = ntohs(param.p->length) - sizeof(struct sctp_paramhdr);
int i;
for (i = 0; i < num_ext; i++) {
switch (param.ext->chunks[i]) {
+ case SCTP_CID_RECONF:
+ if (asoc->reconf_enable &&
+ !asoc->peer.reconf_capable)
+ asoc->peer.reconf_capable = 1;
+ break;
case SCTP_CID_FWD_TSN:
if (asoc->prsctp_enable && !asoc->peer.prsctp_capable)
asoc->peer.prsctp_capable = 1;
@@ -2114,7 +2123,7 @@ static sctp_ierror_t sctp_verify_param(struct net *net,
const struct sctp_endpoint *ep,
const struct sctp_association *asoc,
union sctp_params param,
- sctp_cid_t cid,
+ enum sctp_cid cid,
struct sctp_chunk *chunk,
struct sctp_chunk **err_chunk)
{
@@ -2171,7 +2180,7 @@ static sctp_ierror_t sctp_verify_param(struct net *net,
* cause 'Protocol Violation'.
*/
if (SCTP_AUTH_RANDOM_LENGTH !=
- ntohs(param.p->length) - sizeof(sctp_paramhdr_t)) {
+ ntohs(param.p->length) - sizeof(struct sctp_paramhdr)) {
sctp_process_inv_paramlength(asoc, param.p,
chunk, err_chunk);
retval = SCTP_IERROR_ABORT;
@@ -2199,7 +2208,8 @@ static sctp_ierror_t sctp_verify_param(struct net *net,
goto fallthrough;
hmacs = (struct sctp_hmac_algo_param *)param.p;
- n_elt = (ntohs(param.p->length) - sizeof(sctp_paramhdr_t)) >> 1;
+ n_elt = (ntohs(param.p->length) -
+ sizeof(struct sctp_paramhdr)) >> 1;
/* SCTP-AUTH: Section 6.1
* The HMAC algorithm based on SHA-1 MUST be supported and
@@ -2231,9 +2241,9 @@ fallthrough:
/* Verify the INIT packet before we process it. */
int sctp_verify_init(struct net *net, const struct sctp_endpoint *ep,
- const struct sctp_association *asoc, sctp_cid_t cid,
- sctp_init_chunk_t *peer_init, struct sctp_chunk *chunk,
- struct sctp_chunk **errp)
+ const struct sctp_association *asoc, enum sctp_cid cid,
+ struct sctp_init_chunk *peer_init,
+ struct sctp_chunk *chunk, struct sctp_chunk **errp)
{
union sctp_params param;
bool has_cookie = false;
@@ -2297,7 +2307,7 @@ int sctp_verify_init(struct net *net, const struct sctp_endpoint *ep,
*/
int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk,
const union sctp_addr *peer_addr,
- sctp_init_chunk_t *peer_init, gfp_t gfp)
+ struct sctp_init_chunk *peer_init, gfp_t gfp)
{
struct net *net = sock_net(asoc->base.sk);
union sctp_params param;
@@ -2387,6 +2397,8 @@ 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.
*/
@@ -2438,21 +2450,12 @@ int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk,
* stream sequence number shall be set to 0.
*/
- /* Allocate storage for the negotiated streams if it is not a temporary
- * association.
- */
- if (!asoc->temp) {
- int error;
-
- asoc->ssnmap = sctp_ssnmap_new(asoc->c.sinit_max_instreams,
- asoc->c.sinit_num_ostreams, gfp);
- if (!asoc->ssnmap)
- goto clean_up;
+ if (sctp_stream_init(&asoc->stream, asoc->c.sinit_num_ostreams,
+ asoc->c.sinit_max_instreams, gfp))
+ goto clean_up;
- error = sctp_assoc_set_id(asoc, gfp);
- if (error)
- goto clean_up;
- }
+ if (!asoc->temp && sctp_assoc_set_id(asoc, gfp))
+ goto clean_up;
/* ADDIP Section 4.1 ASCONF Chunk Procedures
*
@@ -2563,7 +2566,7 @@ do_addr_param:
asoc->peer.ipv4_address = 1;
/* Cycle through address types; avoid divide by 0. */
- sat = ntohs(param.p->length) - sizeof(sctp_paramhdr_t);
+ sat = ntohs(param.p->length) - sizeof(struct sctp_paramhdr);
if (sat)
sat /= sizeof(__u16);
@@ -2590,7 +2593,7 @@ do_addr_param:
case SCTP_PARAM_STATE_COOKIE:
asoc->peer.cookie_len =
- ntohs(param.p->length) - sizeof(sctp_paramhdr_t);
+ ntohs(param.p->length) - sizeof(struct sctp_paramhdr);
asoc->peer.cookie = param.cookie->body;
break;
@@ -3174,7 +3177,7 @@ bool sctp_verify_asconf(const struct sctp_association *asoc,
return false;
length = ntohs(param.addip->param_hdr.length);
if (length < sizeof(sctp_addip_param_t) +
- sizeof(sctp_paramhdr_t))
+ sizeof(**errp))
return false;
break;
case SCTP_PARAM_SUCCESS_REPORT:
@@ -3210,14 +3213,14 @@ struct sctp_chunk *sctp_process_asconf(struct sctp_association *asoc,
union sctp_params param;
sctp_addiphdr_t *hdr;
union sctp_addr_param *addr_param;
- sctp_addip_param_t *asconf_param;
struct sctp_chunk *asconf_ack;
__be16 err_code;
int length = 0;
int chunk_len;
__u32 serial;
- chunk_len = ntohs(asconf->chunk_hdr->length) - sizeof(sctp_chunkhdr_t);
+ chunk_len = ntohs(asconf->chunk_hdr->length) -
+ sizeof(struct sctp_chunkhdr);
hdr = (sctp_addiphdr_t *)asconf->skb->data;
serial = ntohl(hdr->serial);
@@ -3230,7 +3233,6 @@ struct sctp_chunk *sctp_process_asconf(struct sctp_association *asoc,
* asconf parameter.
*/
length = ntohs(addr_param->p.length);
- asconf_param = (void *)addr_param + length;
chunk_len -= length;
/* create an ASCONF_ACK chunk.
@@ -3317,8 +3319,7 @@ static void sctp_asconf_param_success(struct sctp_association *asoc,
local_bh_enable();
list_for_each_entry(transport, &asoc->peer.transport_addr_list,
transports) {
- dst_release(transport->dst);
- transport->dst = NULL;
+ sctp_transport_dst_release(transport);
}
break;
case SCTP_PARAM_DEL_IP:
@@ -3332,8 +3333,7 @@ static void sctp_asconf_param_success(struct sctp_association *asoc,
local_bh_enable();
list_for_each_entry(transport, &asoc->peer.transport_addr_list,
transports) {
- dst_release(transport->dst);
- transport->dst = NULL;
+ sctp_transport_dst_release(transport);
}
break;
default:
@@ -3366,7 +3366,7 @@ static __be16 sctp_get_asconf_response(struct sctp_chunk *asconf_ack,
err_code = SCTP_ERROR_REQ_REFUSED;
asconf_ack_len = ntohs(asconf_ack->chunk_hdr->length) -
- sizeof(sctp_chunkhdr_t);
+ sizeof(struct sctp_chunkhdr);
/* Skip the addiphdr from the asconf_ack chunk and store a pointer to
* the first asconf_ack parameter.
@@ -3526,3 +3526,323 @@ 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;
+
+ outlen = (sizeof(outreq) + stream_len) * out;
+ inlen = (sizeof(inreq) + stream_len) * in;
+
+ retval = sctp_make_reconf(asoc, outlen + inlen);
+ if (!retval)
+ return NULL;
+
+ 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);
+ }
+
+ return retval;
+}
+
+/* RE-CONFIG 4.3 (SSN/TSN RESET ALL)
+ * 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 = 15 | Parameter Length = 8 |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Re-configuration Request Sequence Number |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+struct sctp_chunk *sctp_make_strreset_tsnreq(
+ const struct sctp_association *asoc)
+{
+ struct sctp_strreset_tsnreq tsnreq;
+ __u16 length = sizeof(tsnreq);
+ struct sctp_chunk *retval;
+
+ retval = sctp_make_reconf(asoc, length);
+ if (!retval)
+ return NULL;
+
+ tsnreq.param_hdr.type = SCTP_PARAM_RESET_TSN_REQUEST;
+ tsnreq.param_hdr.length = htons(length);
+ tsnreq.request_seq = htonl(asoc->strreset_outseq);
+
+ sctp_addto_chunk(retval, sizeof(tsnreq), &tsnreq);
+
+ return retval;
+}
+
+/* RE-CONFIG 4.5/4.6 (ADD STREAM)
+ * 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 = 17 | Parameter Length = 12 |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Re-configuration Request Sequence Number |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Number of new streams | Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+struct sctp_chunk *sctp_make_strreset_addstrm(
+ const struct sctp_association *asoc,
+ __u16 out, __u16 in)
+{
+ struct sctp_strreset_addstrm addstrm;
+ __u16 size = sizeof(addstrm);
+ struct sctp_chunk *retval;
+
+ retval = sctp_make_reconf(asoc, (!!out + !!in) * size);
+ if (!retval)
+ return NULL;
+
+ if (out) {
+ addstrm.param_hdr.type = SCTP_PARAM_RESET_ADD_OUT_STREAMS;
+ addstrm.param_hdr.length = htons(size);
+ addstrm.number_of_streams = htons(out);
+ addstrm.request_seq = htonl(asoc->strreset_outseq);
+ addstrm.reserved = 0;
+
+ sctp_addto_chunk(retval, size, &addstrm);
+ }
+
+ if (in) {
+ addstrm.param_hdr.type = SCTP_PARAM_RESET_ADD_IN_STREAMS;
+ addstrm.param_hdr.length = htons(size);
+ addstrm.number_of_streams = htons(in);
+ addstrm.request_seq = htonl(asoc->strreset_outseq + !!out);
+ addstrm.reserved = 0;
+
+ sctp_addto_chunk(retval, size, &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;
+}
+
+bool sctp_verify_reconf(const struct sctp_association *asoc,
+ struct sctp_chunk *chunk,
+ struct sctp_paramhdr **errp)
+{
+ struct sctp_reconf_chunk *hdr;
+ union sctp_params param;
+ __u16 last = 0, cnt = 0;
+
+ hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr;
+ sctp_walk_params(param, hdr, params) {
+ __u16 length = ntohs(param.p->length);
+
+ *errp = param.p;
+ if (cnt++ > 2)
+ return false;
+ switch (param.p->type) {
+ case SCTP_PARAM_RESET_OUT_REQUEST:
+ if (length < sizeof(struct sctp_strreset_outreq) ||
+ (last && last != SCTP_PARAM_RESET_RESPONSE &&
+ last != SCTP_PARAM_RESET_IN_REQUEST))
+ return false;
+ break;
+ case SCTP_PARAM_RESET_IN_REQUEST:
+ if (length < sizeof(struct sctp_strreset_inreq) ||
+ (last && last != SCTP_PARAM_RESET_OUT_REQUEST))
+ return false;
+ break;
+ case SCTP_PARAM_RESET_RESPONSE:
+ if ((length != sizeof(struct sctp_strreset_resp) &&
+ length != sizeof(struct sctp_strreset_resptsn)) ||
+ (last && last != SCTP_PARAM_RESET_RESPONSE &&
+ last != SCTP_PARAM_RESET_OUT_REQUEST))
+ return false;
+ break;
+ case SCTP_PARAM_RESET_TSN_REQUEST:
+ if (length !=
+ sizeof(struct sctp_strreset_tsnreq) || last)
+ return false;
+ break;
+ case SCTP_PARAM_RESET_ADD_IN_STREAMS:
+ if (length != sizeof(struct sctp_strreset_addstrm) ||
+ (last && last != SCTP_PARAM_RESET_ADD_OUT_STREAMS))
+ return false;
+ break;
+ case SCTP_PARAM_RESET_ADD_OUT_STREAMS:
+ if (length != sizeof(struct sctp_strreset_addstrm) ||
+ (last && last != SCTP_PARAM_RESET_ADD_IN_STREAMS))
+ return false;
+ break;
+ default:
+ return false;
+ }
+
+ last = param.p->type;
+ }
+
+ return true;
+}
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