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Merge branch 'sctp-rx-side-stream-reconf-asoc-reset-and-add-streams-and-response'

Browse source 
Xin Long says:

====================
sctp: add receiver-side procedures for stream reconf asoc reset and add streams and response

Patch 2/7, 4/7, 5/7, 6/7 are to implement the process of asoc reset request,
add streams requests and all kinds of responses.

Patch 1/7 and 3/7 are ahead of 2/7 and 4/7 to add two event notification
for asoc reset and add streams.

Patch 7/7 is the last patch for implementing rfc6525 sctp stream reconf
to add sysctl and sockopt interface for users to enable sctp stream reconf.

After this patchset, sctp stream reconf will be able to work as rfc6525.

v1->v2:
  - put these into a smaller group.
  - rename the titles of the commits and improve some changelogs.
  - improve sctp_chunk_lookup_strreset_param and reuse it in patch 4/7.
  - process addstrm outreq as the ack of in addstrm inreq if strreset_chunk
    is not NULL in patch 4/7.
  - remove the stream alloc when sending addstrm inreq, and the process in
    peer will response it by sending a addstrm out request back in patch 5/7.
  - adjust the process of addstrm in resp to fit in the codes that only alloc
    streams through addstrm outreq in patch 6/7.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-03-12 23:22:24 -07:00
commit 81663bee16
8 changed files with 585 additions and 25 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
include/net/sctp/sm.h
View file

@ -293,6 +293,22 @@ struct sctp_chunk *sctp_process_strreset_inreq(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp);
struct sctp_chunk *sctp_process_strreset_tsnreq(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp);
struct sctp_chunk *sctp_process_strreset_addstrm_out(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp);
struct sctp_chunk *sctp_process_strreset_addstrm_in(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp);
struct sctp_chunk *sctp_process_strreset_resp(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp);
/* Prototypes for statetable processing. */

8
include/net/sctp/ulpevent.h
View file

@ -132,6 +132,14 @@ struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(
const struct sctp_association *asoc, __u16 flags,
__u16 stream_num, __u16 *stream_list, gfp_t gfp);
struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event(
const struct sctp_association *asoc, __u16 flags,
__u32 local_tsn, __u32 remote_tsn, gfp_t gfp);
struct sctp_ulpevent *sctp_ulpevent_make_stream_change_event(
const struct sctp_association *asoc, __u16 flags,
__u32 strchange_instrms, __u32 strchange_outstrms, gfp_t gfp);
void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
struct msghdr *);
void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event,

31
include/uapi/linux/sctp.h
View file

@ -115,6 +115,7 @@ typedef __s32 sctp_assoc_t;
#define SCTP_PR_SUPPORTED 113
#define SCTP_DEFAULT_PRINFO 114
#define SCTP_PR_ASSOC_STATUS 115
#define SCTP_RECONFIG_SUPPORTED 117
#define SCTP_ENABLE_STREAM_RESET 118
#define SCTP_RESET_STREAMS 119
#define SCTP_RESET_ASSOC 120
@ -502,6 +503,28 @@ struct sctp_stream_reset_event {
__u16 strreset_stream_list[];
};
#define SCTP_ASSOC_RESET_DENIED 0x0004
#define SCTP_ASSOC_RESET_FAILED 0x0008
struct sctp_assoc_reset_event {
__u16 assocreset_type;
__u16 assocreset_flags;
__u32 assocreset_length;
sctp_assoc_t assocreset_assoc_id;
__u32 assocreset_local_tsn;
__u32 assocreset_remote_tsn;
};
#define SCTP_ASSOC_CHANGE_DENIED 0x0004
#define SCTP_ASSOC_CHANGE_FAILED 0x0008
struct sctp_stream_change_event {
__u16 strchange_type;
__u16 strchange_flags;
__u32 strchange_length;
sctp_assoc_t strchange_assoc_id;
__u16 strchange_instrms;
__u16 strchange_outstrms;
};
/*
* Described in Section 7.3
* Ancillary Data and Notification Interest Options
@ -518,6 +541,8 @@ struct sctp_event_subscribe {
__u8 sctp_authentication_event;
__u8 sctp_sender_dry_event;
__u8 sctp_stream_reset_event;
__u8 sctp_assoc_reset_event;
__u8 sctp_stream_change_event;
};
/*
@ -543,6 +568,8 @@ union sctp_notification {
struct sctp_authkey_event sn_authkey_event;
struct sctp_sender_dry_event sn_sender_dry_event;
struct sctp_stream_reset_event sn_strreset_event;
struct sctp_assoc_reset_event sn_assocreset_event;
struct sctp_stream_change_event sn_strchange_event;
};
/* Section 5.3.1
@ -572,6 +599,10 @@ enum sctp_sn_type {
#define SCTP_SENDER_DRY_EVENT SCTP_SENDER_DRY_EVENT
SCTP_STREAM_RESET_EVENT,
#define SCTP_STREAM_RESET_EVENT SCTP_STREAM_RESET_EVENT
SCTP_ASSOC_RESET_EVENT,
#define SCTP_ASSOC_RESET_EVENT SCTP_ASSOC_RESET_EVENT
SCTP_STREAM_CHANGE_EVENT,
#define SCTP_STREAM_CHANGE_EVENT SCTP_STREAM_CHANGE_EVENT
};
/* Notification error codes used to fill up the error fields in some

15
net/sctp/sm_statefuns.c
View file

@ -3872,9 +3872,18 @@ sctp_disposition_t sctp_sf_do_reconf(struct net *net,
else if (param.p->type == SCTP_PARAM_RESET_IN_REQUEST)
reply = sctp_process_strreset_inreq(
(struct sctp_association *)asoc, param, &ev);
/* More handles for other types will be added here, by now it
* just ignores other types.
*/
else if (param.p->type == SCTP_PARAM_RESET_TSN_REQUEST)
reply = sctp_process_strreset_tsnreq(
(struct sctp_association *)asoc, param, &ev);
else if (param.p->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS)
reply = sctp_process_strreset_addstrm_out(
(struct sctp_association *)asoc, param, &ev);
else if (param.p->type == SCTP_PARAM_RESET_ADD_IN_STREAMS)
reply = sctp_process_strreset_addstrm_in(
(struct sctp_association *)asoc, param, &ev);
else if (param.p->type == SCTP_PARAM_RESET_RESPONSE)
reply = sctp_process_strreset_resp(
(struct sctp_association *)asoc, param, &ev);
if (ev)
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,

81
net/sctp/socket.c
View file

@ -3758,6 +3758,39 @@ out:
return retval;
}
static int sctp_setsockopt_reconfig_supported(struct sock *sk,
char __user *optval,
unsigned int optlen)
{
struct sctp_assoc_value params;
struct sctp_association *asoc;
int retval = -EINVAL;
if (optlen != sizeof(params))
goto out;
if (copy_from_user(&params, optval, optlen)) {
retval = -EFAULT;
goto out;
}
asoc = sctp_id2assoc(sk, params.assoc_id);
if (asoc) {
asoc->reconf_enable = !!params.assoc_value;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
sp->ep->reconf_enable = !!params.assoc_value;
} else {
goto out;
}
retval = 0;
out:
return retval;
}
static int sctp_setsockopt_enable_strreset(struct sock *sk,
char __user *optval,
unsigned int optlen)
@ -4038,6 +4071,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_DEFAULT_PRINFO:
retval = sctp_setsockopt_default_prinfo(sk, optval, optlen);
break;
case SCTP_RECONFIG_SUPPORTED:
retval = sctp_setsockopt_reconfig_supported(sk, optval, optlen);
break;
case SCTP_ENABLE_STREAM_RESET:
retval = sctp_setsockopt_enable_strreset(sk, optval, optlen);
break;
@ -6540,6 +6576,47 @@ out:
return retval;
}
static int sctp_getsockopt_reconfig_supported(struct sock *sk, int len,
char __user *optval,
int __user *optlen)
{
struct sctp_assoc_value params;
struct sctp_association *asoc;
int retval = -EFAULT;
if (len < sizeof(params)) {
retval = -EINVAL;
goto out;
}
len = sizeof(params);
if (copy_from_user(&params, optval, len))
goto out;
asoc = sctp_id2assoc(sk, params.assoc_id);
if (asoc) {
params.assoc_value = asoc->reconf_enable;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
params.assoc_value = sp->ep->reconf_enable;
} else {
retval = -EINVAL;
goto out;
}
if (put_user(len, optlen))
goto out;
if (copy_to_user(optval, &params, len))
goto out;
retval = 0;
out:
return retval;
}
static int sctp_getsockopt_enable_strreset(struct sock *sk, int len,
char __user *optval,
int __user *optlen)
@ -6748,6 +6825,10 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
optlen);
break;
case SCTP_RECONFIG_SUPPORTED:
retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
optlen);
break;
case SCTP_ENABLE_STREAM_RESET:
retval = sctp_getsockopt_enable_strreset(sk, len, optval,
optlen);

396
net/sctp/stream.c
View file

@ -267,18 +267,6 @@ int sctp_send_add_streams(struct sctp_association *asoc,
stream->out = streamout;
}
if (in) {
struct sctp_stream_in *streamin;
streamin = krealloc(stream->in, incnt * sizeof(*streamin),
GFP_KERNEL);
if (!streamin)
goto out;
memset(streamin + stream->incnt, 0, in * sizeof(*streamin));
stream->in = streamin;
}
chunk = sctp_make_strreset_addstrm(asoc, out, in);
if (!chunk)
goto out;
@ -303,13 +291,14 @@ out:
}
static sctp_paramhdr_t *sctp_chunk_lookup_strreset_param(
struct sctp_association *asoc, __u32 resp_seq)
struct sctp_association *asoc, __u32 resp_seq,
__be16 type)
{
struct sctp_chunk *chunk = asoc->strreset_chunk;
struct sctp_reconf_chunk *hdr;
union sctp_params param;
if (ntohl(resp_seq) != asoc->strreset_outseq || !chunk)
if (!chunk)
return NULL;
hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr;
@ -320,7 +309,8 @@ static sctp_paramhdr_t *sctp_chunk_lookup_strreset_param(
*/
struct sctp_strreset_tsnreq *req = param.v;
if (req->request_seq == resp_seq)
if ((!resp_seq || req->request_seq == resp_seq) &&
(!type || type == req->param_hdr.type))
return param.v;
}
@ -361,13 +351,9 @@ struct sctp_chunk *sctp_process_strreset_outreq(
goto out;
if (asoc->strreset_chunk) {
sctp_paramhdr_t *param_hdr;
struct sctp_transport *t;
param_hdr = sctp_chunk_lookup_strreset_param(
asoc, outreq->response_seq);
if (!param_hdr || param_hdr->type !=
SCTP_PARAM_RESET_IN_REQUEST) {
if (!sctp_chunk_lookup_strreset_param(
asoc, outreq->response_seq,
SCTP_PARAM_RESET_IN_REQUEST)) {
/* same process with outstanding isn't 0 */
result = SCTP_STRRESET_ERR_IN_PROGRESS;
goto out;
@ -377,6 +363,8 @@ struct sctp_chunk *sctp_process_strreset_outreq(
asoc->strreset_outseq++;
if (!asoc->strreset_outstanding) {
struct sctp_transport *t;
t = asoc->strreset_chunk->transport;
if (del_timer(&t->reconf_timer))
sctp_transport_put(t);
@ -477,3 +465,367 @@ out:
return chunk;
}
struct sctp_chunk *sctp_process_strreset_tsnreq(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp)
{
__u32 init_tsn = 0, next_tsn = 0, max_tsn_seen;
struct sctp_strreset_tsnreq *tsnreq = param.v;
struct sctp_stream *stream = asoc->stream;
__u32 result = SCTP_STRRESET_DENIED;
__u32 request_seq;
__u16 i;
request_seq = ntohl(tsnreq->request_seq);
if (request_seq > asoc->strreset_inseq) {
result = SCTP_STRRESET_ERR_BAD_SEQNO;
goto out;
} else if (request_seq == asoc->strreset_inseq) {
asoc->strreset_inseq++;
}
if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ))
goto out;
if (asoc->strreset_outstanding) {
result = SCTP_STRRESET_ERR_IN_PROGRESS;
goto out;
}
/* G3: The same processing as though a SACK chunk with no gap report
* and a cumulative TSN ACK of the Sender's Next TSN minus 1 were
* received MUST be performed.
*/
max_tsn_seen = sctp_tsnmap_get_max_tsn_seen(&asoc->peer.tsn_map);
sctp_ulpq_reasm_flushtsn(&asoc->ulpq, max_tsn_seen);
sctp_ulpq_abort_pd(&asoc->ulpq, GFP_ATOMIC);
/* G1: Compute an appropriate value for the Receiver's Next TSN -- the
* TSN that the peer should use to send the next DATA chunk. The
* value SHOULD be the smallest TSN not acknowledged by the
* receiver of the request plus 2^31.
*/
init_tsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + (1 << 31);
sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL,
init_tsn, GFP_ATOMIC);
/* G4: The same processing as though a FWD-TSN chunk (as defined in
* [RFC3758]) with all streams affected and a new cumulative TSN
* ACK of the Receiver's Next TSN minus 1 were received MUST be
* performed.
*/
sctp_outq_free(&asoc->outqueue);
/* G2: Compute an appropriate value for the local endpoint's next TSN,
* i.e., the next TSN assigned by the receiver of the SSN/TSN reset
* chunk. The value SHOULD be the highest TSN sent by the receiver
* of the request plus 1.
*/
next_tsn = asoc->next_tsn;
asoc->ctsn_ack_point = next_tsn - 1;
asoc->adv_peer_ack_point = asoc->ctsn_ack_point;
/* G5: The next expected and outgoing SSNs MUST be reset to 0 for all
* incoming and outgoing streams.
*/
for (i = 0; i < stream->outcnt; i++)
stream->out[i].ssn = 0;
for (i = 0; i < stream->incnt; i++)
stream->in[i].ssn = 0;
result = SCTP_STRRESET_PERFORMED;
*evp = sctp_ulpevent_make_assoc_reset_event(asoc, 0, init_tsn,
next_tsn, GFP_ATOMIC);
out:
return sctp_make_strreset_tsnresp(asoc, result, request_seq,
next_tsn, init_tsn);
}
struct sctp_chunk *sctp_process_strreset_addstrm_out(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp)
{
struct sctp_strreset_addstrm *addstrm = param.v;
struct sctp_stream *stream = asoc->stream;
__u32 result = SCTP_STRRESET_DENIED;
struct sctp_stream_in *streamin;
__u32 request_seq, incnt;
__u16 in;
request_seq = ntohl(addstrm->request_seq);
if (request_seq > asoc->strreset_inseq) {
result = SCTP_STRRESET_ERR_BAD_SEQNO;
goto out;
} else if (request_seq == asoc->strreset_inseq) {
asoc->strreset_inseq++;
}
if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ))
goto out;
if (asoc->strreset_chunk) {
if (!sctp_chunk_lookup_strreset_param(
asoc, 0, SCTP_PARAM_RESET_ADD_IN_STREAMS)) {
/* same process with outstanding isn't 0 */
result = SCTP_STRRESET_ERR_IN_PROGRESS;
goto out;
}
asoc->strreset_outstanding--;
asoc->strreset_outseq++;
if (!asoc->strreset_outstanding) {
struct sctp_transport *t;
t = asoc->strreset_chunk->transport;
if (del_timer(&t->reconf_timer))
sctp_transport_put(t);
sctp_chunk_put(asoc->strreset_chunk);
asoc->strreset_chunk = NULL;
}
}
in = ntohs(addstrm->number_of_streams);
incnt = stream->incnt + in;
if (!in || incnt > SCTP_MAX_STREAM)
goto out;
streamin = krealloc(stream->in, incnt * sizeof(*streamin),
GFP_ATOMIC);
if (!streamin)
goto out;
memset(streamin + stream->incnt, 0, in * sizeof(*streamin));
stream->in = streamin;
stream->incnt = incnt;
result = SCTP_STRRESET_PERFORMED;
*evp = sctp_ulpevent_make_stream_change_event(asoc,
0, ntohs(addstrm->number_of_streams), 0, GFP_ATOMIC);
out:
return sctp_make_strreset_resp(asoc, result, request_seq);
}
struct sctp_chunk *sctp_process_strreset_addstrm_in(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp)
{
struct sctp_strreset_addstrm *addstrm = param.v;
struct sctp_stream *stream = asoc->stream;
__u32 result = SCTP_STRRESET_DENIED;
struct sctp_stream_out *streamout;
struct sctp_chunk *chunk = NULL;
__u32 request_seq, outcnt;
__u16 out;
request_seq = ntohl(addstrm->request_seq);
if (request_seq > asoc->strreset_inseq) {
result = SCTP_STRRESET_ERR_BAD_SEQNO;
goto out;
} else if (request_seq == asoc->strreset_inseq) {
asoc->strreset_inseq++;
}
if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ))
goto out;
if (asoc->strreset_outstanding) {
result = SCTP_STRRESET_ERR_IN_PROGRESS;
goto out;
}
out = ntohs(addstrm->number_of_streams);
outcnt = stream->outcnt + out;
if (!out || outcnt > SCTP_MAX_STREAM)
goto out;
streamout = krealloc(stream->out, outcnt * sizeof(*streamout),
GFP_ATOMIC);
if (!streamout)
goto out;
memset(streamout + stream->outcnt, 0, out * sizeof(*streamout));
stream->out = streamout;
chunk = sctp_make_strreset_addstrm(asoc, out, 0);
if (!chunk)
goto out;
asoc->strreset_chunk = chunk;
asoc->strreset_outstanding = 1;
sctp_chunk_hold(asoc->strreset_chunk);
stream->outcnt = outcnt;
*evp = sctp_ulpevent_make_stream_change_event(asoc,
0, 0, ntohs(addstrm->number_of_streams), GFP_ATOMIC);
out:
if (!chunk)
chunk = sctp_make_strreset_resp(asoc, result, request_seq);
return chunk;
}
struct sctp_chunk *sctp_process_strreset_resp(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp)
{
struct sctp_strreset_resp *resp = param.v;
struct sctp_stream *stream = asoc->stream;
struct sctp_transport *t;
__u16 i, nums, flags = 0;
sctp_paramhdr_t *req;
__u32 result;
req = sctp_chunk_lookup_strreset_param(asoc, resp->response_seq, 0);
if (!req)
return NULL;
result = ntohl(resp->result);
if (result != SCTP_STRRESET_PERFORMED) {
/* if in progress, do nothing but retransmit */
if (result == SCTP_STRRESET_IN_PROGRESS)
return NULL;
else if (result == SCTP_STRRESET_DENIED)
flags = SCTP_STREAM_RESET_DENIED;
else
flags = SCTP_STREAM_RESET_FAILED;
}
if (req->type == SCTP_PARAM_RESET_OUT_REQUEST) {
struct sctp_strreset_outreq *outreq;
__u16 *str_p = NULL;
outreq = (struct sctp_strreset_outreq *)req;
nums = (ntohs(outreq->param_hdr.length) - sizeof(*outreq)) / 2;
if (result == SCTP_STRRESET_PERFORMED) {
if (nums) {
str_p = outreq->list_of_streams;
for (i = 0; i < nums; i++)
stream->out[ntohs(str_p[i])].ssn = 0;
} else {
for (i = 0; i < stream->outcnt; i++)
stream->out[i].ssn = 0;
}
flags = SCTP_STREAM_RESET_OUTGOING_SSN;
}
for (i = 0; i < stream->outcnt; i++)
stream->out[i].state = SCTP_STREAM_OPEN;
*evp = sctp_ulpevent_make_stream_reset_event(asoc, flags,
nums, str_p, GFP_ATOMIC);
} else if (req->type == SCTP_PARAM_RESET_IN_REQUEST) {
struct sctp_strreset_inreq *inreq;
__u16 *str_p = NULL;
/* if the result is performed, it's impossible for inreq */
if (result == SCTP_STRRESET_PERFORMED)
return NULL;
inreq = (struct sctp_strreset_inreq *)req;
nums = (ntohs(inreq->param_hdr.length) - sizeof(*inreq)) / 2;
str_p = inreq->list_of_streams;
*evp = sctp_ulpevent_make_stream_reset_event(asoc, flags,
nums, str_p, GFP_ATOMIC);
} else if (req->type == SCTP_PARAM_RESET_TSN_REQUEST) {
struct sctp_strreset_resptsn *resptsn;
__u32 stsn, rtsn;
/* check for resptsn, as sctp_verify_reconf didn't do it*/
if (ntohs(param.p->length) != sizeof(*resptsn))
return NULL;
resptsn = (struct sctp_strreset_resptsn *)resp;
stsn = ntohl(resptsn->senders_next_tsn);
rtsn = ntohl(resptsn->receivers_next_tsn);
if (result == SCTP_STRRESET_PERFORMED) {
__u32 mtsn = sctp_tsnmap_get_max_tsn_seen(
&asoc->peer.tsn_map);
sctp_ulpq_reasm_flushtsn(&asoc->ulpq, mtsn);
sctp_ulpq_abort_pd(&asoc->ulpq, GFP_ATOMIC);
sctp_tsnmap_init(&asoc->peer.tsn_map,
SCTP_TSN_MAP_INITIAL,
stsn, GFP_ATOMIC);
sctp_outq_free(&asoc->outqueue);
asoc->next_tsn = rtsn;
asoc->ctsn_ack_point = asoc->next_tsn - 1;
asoc->adv_peer_ack_point = asoc->ctsn_ack_point;
for (i = 0; i < stream->outcnt; i++)
stream->out[i].ssn = 0;
for (i = 0; i < stream->incnt; i++)
stream->in[i].ssn = 0;
}
for (i = 0; i < stream->outcnt; i++)
stream->out[i].state = SCTP_STREAM_OPEN;
*evp = sctp_ulpevent_make_assoc_reset_event(asoc, flags,
stsn, rtsn, GFP_ATOMIC);
} else if (req->type == SCTP_PARAM_RESET_ADD_OUT_STREAMS) {
struct sctp_strreset_addstrm *addstrm;
__u16 number;
addstrm = (struct sctp_strreset_addstrm *)req;
nums = ntohs(addstrm->number_of_streams);
number = stream->outcnt - nums;
if (result == SCTP_STRRESET_PERFORMED)
for (i = number; i < stream->outcnt; i++)
stream->out[i].state = SCTP_STREAM_OPEN;
else
stream->outcnt = number;
*evp = sctp_ulpevent_make_stream_change_event(asoc, flags,
0, nums, GFP_ATOMIC);
} else if (req->type == SCTP_PARAM_RESET_ADD_IN_STREAMS) {
struct sctp_strreset_addstrm *addstrm;
/* if the result is performed, it's impossible for addstrm in
* request.
*/
if (result == SCTP_STRRESET_PERFORMED)
return NULL;
addstrm = (struct sctp_strreset_addstrm *)req;
nums = ntohs(addstrm->number_of_streams);
*evp = sctp_ulpevent_make_stream_change_event(asoc, flags,
nums, 0, GFP_ATOMIC);
}
asoc->strreset_outstanding--;
asoc->strreset_outseq++;
/* remove everything for this reconf request */
if (!asoc->strreset_outstanding) {
t = asoc->strreset_chunk->transport;
if (del_timer(&t->reconf_timer))
sctp_transport_put(t);
sctp_chunk_put(asoc->strreset_chunk);
asoc->strreset_chunk = NULL;
}
return NULL;
}

7
net/sctp/sysctl.c
View file

@ -274,6 +274,13 @@ static struct ctl_table sctp_net_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "reconf_enable",
.data = &init_net.sctp.reconf_enable,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{
.procname = "auth_enable",
.data = &init_net.sctp.auth_enable,

56
net/sctp/ulpevent.c
View file

@ -883,6 +883,62 @@ struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(
return event;
}
struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event(
const struct sctp_association *asoc, __u16 flags, __u32 local_tsn,
__u32 remote_tsn, gfp_t gfp)
{
struct sctp_assoc_reset_event *areset;
struct sctp_ulpevent *event;
struct sk_buff *skb;
event = sctp_ulpevent_new(sizeof(struct sctp_assoc_reset_event),
MSG_NOTIFICATION, gfp);
if (!event)
return NULL;
skb = sctp_event2skb(event);
areset = (struct sctp_assoc_reset_event *)
skb_put(skb, sizeof(struct sctp_assoc_reset_event));
areset->assocreset_type = SCTP_ASSOC_RESET_EVENT;
areset->assocreset_flags = flags;
areset->assocreset_length = sizeof(struct sctp_assoc_reset_event);
sctp_ulpevent_set_owner(event, asoc);
areset->assocreset_assoc_id = sctp_assoc2id(asoc);
areset->assocreset_local_tsn = local_tsn;
areset->assocreset_remote_tsn = remote_tsn;
return event;
}
struct sctp_ulpevent *sctp_ulpevent_make_stream_change_event(
const struct sctp_association *asoc, __u16 flags,
__u32 strchange_instrms, __u32 strchange_outstrms, gfp_t gfp)
{
struct sctp_stream_change_event *schange;
struct sctp_ulpevent *event;
struct sk_buff *skb;
event = sctp_ulpevent_new(sizeof(struct sctp_stream_change_event),
MSG_NOTIFICATION, gfp);
if (!event)
return NULL;
skb = sctp_event2skb(event);
schange = (struct sctp_stream_change_event *)
skb_put(skb, sizeof(struct sctp_stream_change_event));
schange->strchange_type = SCTP_STREAM_CHANGE_EVENT;
schange->strchange_flags = flags;
schange->strchange_length = sizeof(struct sctp_stream_change_event);
sctp_ulpevent_set_owner(event, asoc);
schange->strchange_assoc_id = sctp_assoc2id(asoc);
schange->strchange_instrms = strchange_instrms;
schange->strchange_outstrms = strchange_outstrms;
return event;
}
/* Return the notification type, assuming this is a notification
* event.
*/