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sctp: add SCTP_PR_SUPPORTED on sctp sockopt

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According to section 4.5 of rfc7496, prsctp_enable should be per asoc.
We will add prsctp_enable to both asoc and ep, and replace the places
where it used net.sctp->prsctp_enable with asoc->prsctp_enable.

ep->prsctp_enable will be initialized with net.sctp->prsctp_enable, and
asoc->prsctp_enable will be initialized with ep->prsctp_enable. We can
also modify it's value through sockopt SCTP_PR_SUPPORTED.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2016-07-09 19:47:40 +08:00 committed by David S. Miller
parent bac65c4b39
commit 28aa4c26fc
6 changed files with 93 additions and 8 deletions
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6
include/net/sctp/structs.h
View File

@ -1256,7 +1256,8 @@ struct sctp_endpoint {
/* SCTP-AUTH: endpoint shared keys */
struct list_head endpoint_shared_keys;
__u16 active_key_id;
__u8 auth_enable;
__u8 auth_enable:1,
prsctp_enable:1;
};
/* Recover the outter endpoint structure. */
@ -1848,7 +1849,8 @@ struct sctp_association {
__u16 active_key_id;
__u8 need_ecne:1, /* Need to send an ECNE Chunk? */
temp:1; /* Is it a temporary association? */
temp:1, /* Is it a temporary association? */
prsctp_enable:1;
struct sctp_priv_assoc_stats stats;
};

1
include/uapi/linux/sctp.h
View File

@ -112,6 +112,7 @@ typedef __s32 sctp_assoc_t;
#define SCTP_SOCKOPT_CONNECTX 110 /* CONNECTX requests. */
#define SCTP_SOCKOPT_CONNECTX3 111 /* CONNECTX requests (updated) */
#define SCTP_GET_ASSOC_STATS 112 /* Read only */
#define SCTP_PR_SUPPORTED 113
/* 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. */

1
net/sctp/associola.c
View File

@ -268,6 +268,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
goto fail_init;
asoc->active_key_id = ep->active_key_id;
asoc->prsctp_enable = ep->prsctp_enable;
/* Save the hmacs and chunks list into this association */
if (ep->auth_hmacs_list)

1
net/sctp/endpointola.c
View File

@ -163,6 +163,7 @@ 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;
return ep;

12
net/sctp/sm_make_chunk.c
View File

@ -261,7 +261,7 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
chunksize += WORD_ROUND(SCTP_SAT_LEN(num_types));
chunksize += sizeof(ecap_param);
if (net->sctp.prsctp_enable)
if (asoc->prsctp_enable)
chunksize += sizeof(prsctp_param);
/* ADDIP: Section 4.2.7:
@ -355,7 +355,7 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
sctp_addto_param(retval, num_ext, extensions);
}
if (net->sctp.prsctp_enable)
if (asoc->prsctp_enable)
sctp_addto_chunk(retval, sizeof(prsctp_param), &prsctp_param);
if (sp->adaptation_ind) {
@ -2024,8 +2024,8 @@ 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_FWD_TSN:
if (net->sctp.prsctp_enable && !asoc->peer.prsctp_capable)
asoc->peer.prsctp_capable = 1;
if (asoc->prsctp_enable && !asoc->peer.prsctp_capable)
asoc->peer.prsctp_capable = 1;
break;
case SCTP_CID_AUTH:
/* if the peer reports AUTH, assume that he
@ -2169,7 +2169,7 @@ static sctp_ierror_t sctp_verify_param(struct net *net,
break;
case SCTP_PARAM_FWD_TSN_SUPPORT:
if (net->sctp.prsctp_enable)
if (ep->prsctp_enable)
break;
goto fallthrough;
@ -2653,7 +2653,7 @@ do_addr_param:
break;
case SCTP_PARAM_FWD_TSN_SUPPORT:
if (net->sctp.prsctp_enable) {
if (asoc->prsctp_enable) {
asoc->peer.prsctp_capable = 1;
break;
}

80
net/sctp/socket.c
View File

@ -3661,6 +3661,39 @@ static int sctp_setsockopt_recvnxtinfo(struct sock *sk,
return 0;
}
static int sctp_setsockopt_pr_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->prsctp_enable = !!params.assoc_value;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
sp->ep->prsctp_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
@ -3821,6 +3854,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_RECVNXTINFO:
retval = sctp_setsockopt_recvnxtinfo(sk, optval, optlen);
break;
case SCTP_PR_SUPPORTED:
retval = sctp_setsockopt_pr_supported(sk, optval, optlen);
break;
default:
retval = -ENOPROTOOPT;
break;
@ -6166,6 +6202,47 @@ static int sctp_getsockopt_recvnxtinfo(struct sock *sk, int len,
return 0;
}
static int sctp_getsockopt_pr_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->prsctp_enable;
} else if (!params.assoc_id) {
struct sctp_sock *sp = sctp_sk(sk);
params.assoc_value = sp->ep->prsctp_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)
{
@ -6319,6 +6396,9 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
case SCTP_RECVNXTINFO:
retval = sctp_getsockopt_recvnxtinfo(sk, len, optval, optlen);
break;
case SCTP_PR_SUPPORTED:
retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
break;
default:
retval = -ENOPROTOOPT;
break;