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authorXin Long <lucien.xin@gmail.com>2017-01-18 00:44:45 +0800
committerDavid S. Miller <davem@davemloft.net>2017-01-18 14:55:10 -0500
commitc28445c3cb07ba1da2c1dc7b5f3066c686a6acc6 (patch)
tree895c47f141f724503092d5966687e3484c202673
parent7a090b04522b46a219c271d4cd2abbf572623e03 (diff)
downloadblackbird-op-linux-c28445c3cb07ba1da2c1dc7b5f3066c686a6acc6.tar.gz
blackbird-op-linux-c28445c3cb07ba1da2c1dc7b5f3066c686a6acc6.zip
sctp: add reconf_enable in asoc ep and netns
This patch is to add reconf_enable field in all of asoc ep and netns to indicate if they support stream reset. When initializing, asoc reconf_enable get the default value from ep reconf_enable which is from netns netns reconf_enable by default. It is also to add reconf_capable in asoc peer part to know if peer supports reconf_enable, the value is set if ext params have reconf chunk support when processing init chunk, just 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>
-rw-r--r--include/net/netns/sctp.h3
-rw-r--r--include/net/sctp/structs.h7
-rw-r--r--net/sctp/associola.c1
-rw-r--r--net/sctp/endpointola.c1
-rw-r--r--net/sctp/protocol.c3
-rw-r--r--net/sctp/sm_make_chunk.c15
6 files changed, 28 insertions, 2 deletions
diff --git a/include/net/netns/sctp.h b/include/net/netns/sctp.h
index c501d67172b1..b7871d018354 100644
--- a/include/net/netns/sctp.h
+++ b/include/net/netns/sctp.h
@@ -118,6 +118,9 @@ struct netns_sctp {
/* Flag to indicate if PR-SCTP is enabled. */
int prsctp_enable;
+ /* Flag to indicate if PR-CONFIG is enabled. */
+ int reconf_enable;
+
/* Flag to idicate if SCTP-AUTH is enabled */
int auth_enable;
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 463b4d642d68..ee037ef15d65 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -1255,7 +1255,8 @@ struct sctp_endpoint {
struct list_head endpoint_shared_keys;
__u16 active_key_id;
__u8 auth_enable:1,
- prsctp_enable:1;
+ prsctp_enable:1,
+ reconf_enable:1;
};
/* Recover the outter endpoint structure. */
@@ -1508,6 +1509,7 @@ struct sctp_association {
hostname_address:1, /* Peer understands DNS addresses? */
asconf_capable:1, /* Does peer support ADDIP? */
prsctp_capable:1, /* Can peer do PR-SCTP? */
+ reconf_capable:1, /* Can peer do RE-CONFIG? */
auth_capable:1; /* Is peer doing SCTP-AUTH? */
/* sack_needed : This flag indicates if the next received
@@ -1867,7 +1869,8 @@ struct sctp_association {
__u8 need_ecne:1, /* Need to send an ECNE Chunk? */
temp:1, /* Is it a temporary association? */
- prsctp_enable:1;
+ prsctp_enable:1,
+ reconf_enable:1;
__u32 strreset_outseq; /* Update after receiving response */
__u32 strreset_inseq; /* Update after receiving request */
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index fc33540d2f11..68b99adc21a3 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -270,6 +270,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
asoc->active_key_id = ep->active_key_id;
asoc->prsctp_enable = ep->prsctp_enable;
+ asoc->reconf_enable = ep->reconf_enable;
/* Save the hmacs and chunks list into this association */
if (ep->auth_hmacs_list)
diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index 410ddc1e3443..8c589230794f 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -164,6 +164,7 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
ep->auth_hmacs_list = auth_hmacs;
ep->auth_chunk_list = auth_chunks;
ep->prsctp_enable = net->sctp.prsctp_enable;
+ ep->reconf_enable = net->sctp.reconf_enable;
return ep;
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index f9c3c37c9ae0..8227bbbd077a 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1258,6 +1258,9 @@ static int __net_init sctp_defaults_init(struct net *net)
/* Enable PR-SCTP by default. */
net->sctp.prsctp_enable = 1;
+ /* Disable RECONF by default. */
+ net->sctp.reconf_enable = 0;
+
/* Disable AUTH by default. */
net->sctp.auth_enable = 0;
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index df81fce08890..ad3445b3408e 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -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);
@@ -434,6 +439,11 @@ 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);
@@ -2012,6 +2022,11 @@ static void sctp_process_ext_param(struct sctp_association *asoc,
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;
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