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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-03-23 14:34:36 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-26 01:28:04 -0400
commit703315712cfccfe0b45ef4aa6994527d8ee95e33 (patch)
tree618a5aced2dfd2937259b3e99f477b9d1f80e24d /net/sctp/socket.c
parenta5a35e76753d27e782028843a5186f176b50dd16 (diff)
[SCTP]: Implement SCTP_MAX_BURST socket option.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/socket.c')
-rw-r--r--net/sctp/socket.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index dda2f6700f5b..f904f2bc0f2c 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2892,6 +2892,36 @@ static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
2892 return 0; /* is this the right error code? */ 2892 return 0; /* is this the right error code? */
2893} 2893}
2894 2894
2895/*
2896 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
2897 *
2898 * This option will allow a user to change the maximum burst of packets
2899 * that can be emitted by this association. Note that the default value
2900 * is 4, and some implementations may restrict this setting so that it
2901 * can only be lowered.
2902 *
2903 * NOTE: This text doesn't seem right. Do this on a socket basis with
2904 * future associations inheriting the socket value.
2905 */
2906static int sctp_setsockopt_maxburst(struct sock *sk,
2907 char __user *optval,
2908 int optlen)
2909{
2910 int val;
2911
2912 if (optlen != sizeof(int))
2913 return -EINVAL;
2914 if (get_user(val, (int __user *)optval))
2915 return -EFAULT;
2916
2917 if (val < 0)
2918 return -EINVAL;
2919
2920 sctp_sk(sk)->max_burst = val;
2921
2922 return 0;
2923}
2924
2895/* API 6.2 setsockopt(), getsockopt() 2925/* API 6.2 setsockopt(), getsockopt()
2896 * 2926 *
2897 * Applications use setsockopt() and getsockopt() to set or retrieve 2927 * Applications use setsockopt() and getsockopt() to set or retrieve
@@ -3012,6 +3042,9 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
3012 case SCTP_FRAGMENT_INTERLEAVE: 3042 case SCTP_FRAGMENT_INTERLEAVE:
3013 retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); 3043 retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen);
3014 break; 3044 break;
3045 case SCTP_MAX_BURST:
3046 retval = sctp_setsockopt_maxburst(sk, optval, optlen);
3047 break;
3015 default: 3048 default:
3016 retval = -ENOPROTOOPT; 3049 retval = -ENOPROTOOPT;
3017 break; 3050 break;
@@ -3171,6 +3204,7 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
3171 sp->default_timetolive = 0; 3204 sp->default_timetolive = 0;
3172 3205
3173 sp->default_rcv_context = 0; 3206 sp->default_rcv_context = 0;
3207 sp->max_burst = sctp_max_burst;
3174 3208
3175 /* Initialize default setup parameters. These parameters 3209 /* Initialize default setup parameters. These parameters
3176 * can be modified with the SCTP_INITMSG socket option or 3210 * can be modified with the SCTP_INITMSG socket option or
@@ -4689,6 +4723,30 @@ static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
4689 return -ENOTSUPP; 4723 return -ENOTSUPP;
4690} 4724}
4691 4725
4726/*
4727 * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
4728 * (chapter and verse is quoted at sctp_setsockopt_maxburst())
4729 */
4730static int sctp_getsockopt_maxburst(struct sock *sk, int len,
4731 char __user *optval,
4732 int __user *optlen)
4733{
4734 int val;
4735
4736 if (len < sizeof(int))
4737 return -EINVAL;
4738
4739 len = sizeof(int);
4740
4741 val = sctp_sk(sk)->max_burst;
4742 if (put_user(len, optlen))
4743 return -EFAULT;
4744 if (copy_to_user(optval, &val, len))
4745 return -EFAULT;
4746
4747 return -ENOTSUPP;
4748}
4749
4692SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname, 4750SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
4693 char __user *optval, int __user *optlen) 4751 char __user *optval, int __user *optlen)
4694{ 4752{
@@ -4809,6 +4867,9 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
4809 retval = sctp_getsockopt_partial_delivery_point(sk, len, optval, 4867 retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
4810 optlen); 4868 optlen);
4811 break; 4869 break;
4870 case SCTP_MAX_BURST:
4871 retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
4872 break;
4812 default: 4873 default:
4813 retval = -ENOPROTOOPT; 4874 retval = -ENOPROTOOPT;
4814 break; 4875 break;