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[DCCP]: Introduce DCCP_SOCKOPT_PACKET_SIZE

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So that applications can set dccp_sock->dccps_pkt_size, that in turn
is used in the CCID3 half connection init routines to set
ccid3hc[tr]x_s and use it in its rate calculations.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo
2005-08-28 04:51:32 -03:00
committed by David S. Miller
parent 0ac4f893f2
commit a84ffe4303
3 changed files with 59 additions and 12 deletions
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52
net/dccp/proto.c
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@ -205,23 +205,67 @@ int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg)
int dccp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
dccp_pr_debug("entry\n");
struct dccp_sock *dp;
int err;
int val;
if (level != SOL_DCCP)
return ip_setsockopt(sk, level, optname, optval, optlen);
return -EOPNOTSUPP;
if (optlen < sizeof(int))
return -EINVAL;
if (get_user(val, (int __user *)optval))
return -EFAULT;
lock_sock(sk);
dp = dccp_sk(sk);
err = 0;
switch (optname) {
case DCCP_SOCKOPT_PACKET_SIZE:
dp->dccps_packet_size = val;
break;
default:
err = -ENOPROTOOPT;
break;
}
release_sock(sk);
return err;
}
int dccp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
dccp_pr_debug("entry\n");
struct dccp_sock *dp;
int val, len;
if (level != SOL_DCCP)
return ip_getsockopt(sk, level, optname, optval, optlen);
return -EOPNOTSUPP;
if (get_user(len, optlen))
return -EFAULT;
len = min_t(unsigned int, len, sizeof(int));
if (len < 0)
return -EINVAL;
dp = dccp_sk(sk);
switch (optname) {
case DCCP_SOCKOPT_PACKET_SIZE:
val = dp->dccps_packet_size;
break;
default:
return -ENOPROTOOPT;
}
if (put_user(len, optlen) || copy_to_user(optval, &val, len))
return -EFAULT;
return 0;
}
int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,