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sctp: implement socket option SCTP_GET_ASSOC_ID_LIST 

This patch Implement socket option SCTP_GET_ASSOC_ID_LIST.
SCTP Socket API Extension:

  8.2.6. Get the Current Identifiers of Associations
         (SCTP_GET_ASSOC_ID_LIST)

  This option gets the current list of SCTP association identifiers of
  the SCTP associations handled by a one-to-many style socket.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wei Yongjun 2011-04-17 17:27:08 +00:00 committed by David S. Miller
parent 4c6a6f4213
commit 209ba424c2
2 changed files with 65 additions and 0 deletions
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13
include/net/sctp/user.h
View File

@ -91,6 +91,7 @@ typedef __s32 sctp_assoc_t;
#define SCTP_PEER_AUTH_CHUNKS 26 /* Read only */
#define SCTP_LOCAL_AUTH_CHUNKS 27 /* Read only */
#define SCTP_GET_ASSOC_NUMBER 28 /* Read only */
#define SCTP_GET_ASSOC_ID_LIST 29 /* Read only */
/* Internal Socket Options. Some of the sctp library functions are
* implemented using these socket options.
@ -668,6 +669,18 @@ struct sctp_authchunks {
uint8_t gauth_chunks[];
};
/*
* 8.2.6. Get the Current Identifiers of Associations
* (SCTP_GET_ASSOC_ID_LIST)
*
* This option gets the current list of SCTP association identifiers of
* the SCTP associations handled by a one-to-many style socket.
*/
struct sctp_assoc_ids {
__u32 gaids_number_of_ids;
sctp_assoc_t gaids_assoc_id[];
};
/*
* 8.3, 8.5 get all peer/local addresses in an association.
* This parameter struct is used by SCTP_GET_PEER_ADDRS and

52
net/sctp/socket.c
View File

@ -5277,6 +5277,55 @@ static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
return 0;
}
/*
* 8.2.6. Get the Current Identifiers of Associations
* (SCTP_GET_ASSOC_ID_LIST)
*
* This option gets the current list of SCTP association identifiers of
* the SCTP associations handled by a one-to-many style socket.
*/
static int sctp_getsockopt_assoc_ids(struct sock *sk, int len,
char __user *optval, int __user *optlen)
{
struct sctp_sock *sp = sctp_sk(sk);
struct sctp_association *asoc;
struct sctp_assoc_ids *ids;
u32 num = 0;
if (sctp_style(sk, TCP))
return -EOPNOTSUPP;
if (len < sizeof(struct sctp_assoc_ids))
return -EINVAL;
list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
num++;
}
if (len < sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num)
return -EINVAL;
len = sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num;
ids = kmalloc(len, GFP_KERNEL);
if (unlikely(!ids))
return -ENOMEM;
ids->gaids_number_of_ids = num;
num = 0;
list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
ids->gaids_assoc_id[num++] = asoc->assoc_id;
}
if (put_user(len, optlen) || copy_to_user(optval, ids, len)) {
kfree(ids);
return -EFAULT;
}
kfree(ids);
return 0;
}
SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@ -5409,6 +5458,9 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
case SCTP_GET_ASSOC_NUMBER:
retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
break;
case SCTP_GET_ASSOC_ID_LIST:
retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen);
break;
default:
retval = -ENOPROTOOPT;
break;