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sctp: implement sender-side procedures for Add Incoming/Outgoing Streams Request Parameter

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This patch is to implement Sender-Side Procedures for the Add
Outgoing and Incoming Streams Request Parameter described in
rfc6525 section 5.1.5-5.1.6.

It is also to add sockopt SCTP_ADD_STREAMS in rfc6525 section
6.3.4 for users.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long
2017-02-09 01:18:20 +08:00
committed by David S. Miller
parent 78098117f8
commit 242bd2d519
4 changed files with 115 additions and 0 deletions
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29
net/sctp/socket.c
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@@ -3844,6 +3844,32 @@ out:
return retval;
}
static int sctp_setsockopt_add_streams(struct sock *sk,
char __user *optval,
unsigned int optlen)
{
struct sctp_association *asoc;
struct sctp_add_streams params;
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.sas_assoc_id);
if (!asoc)
goto out;
retval = sctp_send_add_streams(asoc, &params);
out:
return retval;
}
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@@ -4019,6 +4045,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_RESET_ASSOC:
retval = sctp_setsockopt_reset_assoc(sk, optval, optlen);
break;
case SCTP_ADD_STREAMS:
retval = sctp_setsockopt_add_streams(sk, optval, optlen);
break;
default:
retval = -ENOPROTOOPT;
break;