This patch is to implement Sender-Side Procedures for the SSN/TSN
Reset Request Parameter descibed in rfc6525 section 5.1.4.
It is also to add sockopt SCTP_RESET_ASSOC in rfc6525 section 6.3.3
for users.
Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
---
include/net/sctp/sctp.h | 1 +
include/uapi/linux/sctp.h | 1 +
net/sctp/socket.c | 29 +++++++++++++++++++++++++++++
net/sctp/stream.c | 33 +++++++++++++++++++++++++++++++++
4 files changed, 64 insertions(+)
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 3cfd365b..b93820f 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -198,6 +198,7 @@ int sctp_offload_init(void);
*/
int sctp_send_reset_streams(struct sctp_association *asoc,
struct sctp_reset_streams *params);
+int sctp_send_reset_assoc(struct sctp_association *asoc);
/*
* Module global variables
diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h
index 03c27ce..c0bd8c3 100644
--- a/include/uapi/linux/sctp.h
+++ b/include/uapi/linux/sctp.h
@@ -117,6 +117,7 @@ typedef __s32 sctp_assoc_t;
#define SCTP_PR_ASSOC_STATUS 115
#define SCTP_ENABLE_STREAM_RESET 118
#define SCTP_RESET_STREAMS 119
+#define SCTP_RESET_ASSOC 120
/* PR-SCTP policies */
#define SCTP_PR_SCTP_NONE 0x0000
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index bee4dd3..2c5c9ca 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3812,6 +3812,32 @@ static int sctp_setsockopt_reset_streams(struct sock *sk,
return retval;
}
+static int sctp_setsockopt_reset_assoc(struct sock *sk,
+ char __user *optval,
+ unsigned int optlen)
+{
+ struct sctp_association *asoc;
+ sctp_assoc_t associd;
+ int retval = -EINVAL;
+
+ if (optlen != sizeof(associd))
+ goto out;
+
+ if (copy_from_user(&associd, optval, optlen)) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ asoc = sctp_id2assoc(sk, associd);
+ if (!asoc)
+ goto out;
+
+ retval = sctp_send_reset_assoc(asoc);
+
+out:
+ return retval;
+}
+
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@@ -3984,6 +4010,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_RESET_STREAMS:
retval = sctp_setsockopt_reset_streams(sk, optval, optlen);
break;
+ case SCTP_RESET_ASSOC:
+ retval = sctp_setsockopt_reset_assoc(sk, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
diff --git a/net/sctp/stream.c b/net/sctp/stream.c
index 13d5e07..b368191 100644
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -162,3 +162,36 @@ int sctp_send_reset_streams(struct sctp_association *asoc,
out:
return retval;
}
+
+int sctp_send_reset_assoc(struct sctp_association *asoc)
+{
+ struct sctp_chunk *chunk = NULL;
+ int retval;
+ __u16 i;
+
+ if (!asoc->peer.reconf_capable ||
+ !(asoc->strreset_enable & SCTP_ENABLE_RESET_ASSOC_REQ))
+ return -ENOPROTOOPT;
+
+ if (asoc->strreset_outstanding)
+ return -EINPROGRESS;
+
+ chunk = sctp_make_strreset_tsnreq(asoc);
+ if (!chunk)
+ return -ENOMEM;
+
+ for (i = 0; i < asoc->stream->outcnt; i++)
+ asoc->stream->out[i].state = SCTP_STREAM_CLOSED;
+
+ asoc->strreset_outstanding = 1;
+ asoc->strreset_chunk = chunk;
+ sctp_chunk_hold(asoc->strreset_chunk);
+
+ retval = sctp_send_reconf(asoc, chunk);
+ if (retval) {
+ sctp_chunk_put(asoc->strreset_chunk);
+ asoc->strreset_chunk = NULL;
+ }
+
+ return retval;
+}
--
2.1.0
--
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