Commit 9fb657ae authored by Xin Long's avatar Xin Long Committed by David S. Miller

sctp: add sockopt SCTP_ENABLE_STREAM_RESET

This patch is to add sockopt SCTP_ENABLE_STREAM_RESET to get/set
strreset_enable to indicate which reconf request type it supports,
which is described in rfc6525 section 6.3.1.
Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c28445c3
......@@ -1257,6 +1257,8 @@ struct sctp_endpoint {
__u8 auth_enable:1,
prsctp_enable:1,
reconf_enable:1;
__u8 strreset_enable;
};
/* Recover the outter endpoint structure. */
......@@ -1872,6 +1874,8 @@ struct sctp_association {
prsctp_enable:1,
reconf_enable:1;
__u8 strreset_enable;
__u32 strreset_outseq; /* Update after receiving response */
__u32 strreset_inseq; /* Update after receiving request */
......
......@@ -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_ENABLE_STREAM_RESET 118
/* PR-SCTP policies */
#define SCTP_PR_SCTP_NONE 0x0000
......@@ -138,6 +139,12 @@ typedef __s32 sctp_assoc_t;
#define SCTP_PR_RTX_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX)
#define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO)
/* For enable stream reset */
#define SCTP_ENABLE_RESET_STREAM_REQ 0x01
#define SCTP_ENABLE_RESET_ASSOC_REQ 0x02
#define SCTP_ENABLE_CHANGE_ASSOC_REQ 0x04
#define SCTP_ENABLE_STRRESET_MASK 0x07
/* These are bit fields for msghdr->msg_flags. See section 5.1. */
/* On user space Linux, these live in <bits/socket.h> as an enum. */
enum sctp_msg_flags {
......
......@@ -271,6 +271,7 @@ 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;
asoc->strreset_enable = ep->strreset_enable;
/* Save the hmacs and chunks list into this association */
if (ep->auth_hmacs_list)
......
......@@ -3750,6 +3750,42 @@ static int sctp_setsockopt_default_prinfo(struct sock *sk,
return retval;
}
static int sctp_setsockopt_enable_strreset(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;
}
if (params.assoc_value & (~SCTP_ENABLE_STRRESET_MASK))
goto out;
asoc = sctp_id2assoc(sk, params.assoc_id);
if (asoc) {
asoc->strreset_enable = params.assoc_value;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
sp->ep->strreset_enable = params.assoc_value;
} else {
goto out;
}
retval = 0;
out:
return retval;
}
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
......@@ -3916,6 +3952,9 @@ 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_ENABLE_STREAM_RESET:
retval = sctp_setsockopt_enable_strreset(sk, optval, optlen);
break;
default:
retval = -ENOPROTOOPT;
break;
......@@ -6400,6 +6439,47 @@ static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
return retval;
}
static int sctp_getsockopt_enable_strreset(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->strreset_enable;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
params.assoc_value = sp->ep->strreset_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(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
......@@ -6567,6 +6647,10 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
optlen);
break;
case SCTP_ENABLE_STREAM_RESET:
retval = sctp_getsockopt_enable_strreset(sk, len, optval,
optlen);
break;
default:
retval = -ENOPROTOOPT;
break;
......
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