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author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-03-23 19:34:36 +0100 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-26 07:28:04 +0200 |
commit | 703315712cfccfe0b45ef4aa6994527d8ee95e33 (patch) | |
tree | 618a5aced2dfd2937259b3e99f477b9d1f80e24d /net/sctp/socket.c | |
parent | [SCTP]: Implement sac_info field in SCTP_ASSOC_CHANGE notification. (diff) | |
download | linux-703315712cfccfe0b45ef4aa6994527d8ee95e33.tar.xz linux-703315712cfccfe0b45ef4aa6994527d8ee95e33.zip |
[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.c | 61 |
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, return 0; /* is this the right error code? */ } +/* + * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) + * + * This option will allow a user to change the maximum burst of packets + * that can be emitted by this association. Note that the default value + * is 4, and some implementations may restrict this setting so that it + * can only be lowered. + * + * NOTE: This text doesn't seem right. Do this on a socket basis with + * future associations inheriting the socket value. + */ +static int sctp_setsockopt_maxburst(struct sock *sk, + char __user *optval, + int optlen) +{ + int val; + + if (optlen != sizeof(int)) + return -EINVAL; + if (get_user(val, (int __user *)optval)) + return -EFAULT; + + if (val < 0) + return -EINVAL; + + sctp_sk(sk)->max_burst = val; + + return 0; +} + /* API 6.2 setsockopt(), getsockopt() * * 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, case SCTP_FRAGMENT_INTERLEAVE: retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); break; + case SCTP_MAX_BURST: + retval = sctp_setsockopt_maxburst(sk, optval, optlen); + break; default: retval = -ENOPROTOOPT; break; @@ -3171,6 +3204,7 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk) sp->default_timetolive = 0; sp->default_rcv_context = 0; + sp->max_burst = sctp_max_burst; /* Initialize default setup parameters. These parameters * 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, return -ENOTSUPP; } +/* + * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) + * (chapter and verse is quoted at sctp_setsockopt_maxburst()) + */ +static int sctp_getsockopt_maxburst(struct sock *sk, int len, + char __user *optval, + int __user *optlen) +{ + int val; + + if (len < sizeof(int)) + return -EINVAL; + + len = sizeof(int); + + val = sctp_sk(sk)->max_burst; + if (put_user(len, optlen)) + return -EFAULT; + if (copy_to_user(optval, &val, len)) + return -EFAULT; + + return -ENOTSUPP; +} + SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) { @@ -4809,6 +4867,9 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname, retval = sctp_getsockopt_partial_delivery_point(sk, len, optval, optlen); break; + case SCTP_MAX_BURST: + retval = sctp_getsockopt_maxburst(sk, len, optval, optlen); + break; default: retval = -ENOPROTOOPT; break; |