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authorXin Long <lucien.xin@gmail.com>2016-07-09 19:47:41 +0800
committerDavid S. Miller <davem@davemloft.net>2016-07-11 13:25:38 -0700
commitf959fb442c35f4b61fea341401b8463dd0a1b959 (patch)
tree8e039e6a62d97bedf18d27287955446d5da5b9b3 /net/sctp
parent28aa4c26fce2202db8d42ae76b639ca1d9a23d25 (diff)
downloadlinux-f959fb442c35f4b61fea341401b8463dd0a1b959.tar.bz2
sctp: add SCTP_DEFAULT_PRINFO into sctp sockopt
This patch adds SCTP_DEFAULT_PRINFO to sctp sockopt. It is used to set/get sctp Partially Reliable Policies' default params, which includes 3 policies (ttl, rtx, prio) and their values. Still, if we set policy params in sndinfo, we will use the params of sndinfo against chunks, instead of the default params. In this patch, we will use 5-8bit of sp/asoc->default_flags to store prsctp policies, and reuse asoc->default_timetolive to store their values. It means if we enable and set prsctp policy, prior ttl timeout in sctp will not work any more. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/socket.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 7460ddebd9ce..c03fe1b76706 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3694,6 +3694,47 @@ out:
return retval;
}
+static int sctp_setsockopt_default_prinfo(struct sock *sk,
+ char __user *optval,
+ unsigned int optlen)
+{
+ struct sctp_default_prinfo info;
+ struct sctp_association *asoc;
+ int retval = -EINVAL;
+
+ if (optlen != sizeof(info))
+ goto out;
+
+ if (copy_from_user(&info, optval, sizeof(info))) {
+ retval = -EFAULT;
+ goto out;
+ }
+
+ if (info.pr_policy & ~SCTP_PR_SCTP_MASK)
+ goto out;
+
+ if (info.pr_policy == SCTP_PR_SCTP_NONE)
+ info.pr_value = 0;
+
+ asoc = sctp_id2assoc(sk, info.pr_assoc_id);
+ if (asoc) {
+ SCTP_PR_SET_POLICY(asoc->default_flags, info.pr_policy);
+ asoc->default_timetolive = info.pr_value;
+ } else if (!info.pr_assoc_id) {
+ struct sctp_sock *sp = sctp_sk(sk);
+
+ SCTP_PR_SET_POLICY(sp->default_flags, info.pr_policy);
+ sp->default_timetolive = info.pr_value;
+ } else {
+ goto out;
+ }
+
+ retval = 0;
+
+out:
+ return retval;
+}
+
/* API 6.2 setsockopt(), getsockopt()
*
* Applications use setsockopt() and getsockopt() to set or retrieve
@@ -3857,6 +3898,9 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
case SCTP_PR_SUPPORTED:
retval = sctp_setsockopt_pr_supported(sk, optval, optlen);
break;
+ case SCTP_DEFAULT_PRINFO:
+ retval = sctp_setsockopt_default_prinfo(sk, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
@@ -6243,6 +6287,49 @@ out:
return retval;
}
+static int sctp_getsockopt_default_prinfo(struct sock *sk, int len,
+ char __user *optval,
+ int __user *optlen)
+{
+ struct sctp_default_prinfo info;
+ struct sctp_association *asoc;
+ int retval = -EFAULT;
+
+ if (len < sizeof(info)) {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ len = sizeof(info);
+ if (copy_from_user(&info, optval, len))
+ goto out;
+
+ asoc = sctp_id2assoc(sk, info.pr_assoc_id);
+ if (asoc) {
+ info.pr_policy = SCTP_PR_POLICY(asoc->default_flags);
+ info.pr_value = asoc->default_timetolive;
+ } else if (!info.pr_assoc_id) {
+ struct sctp_sock *sp = sctp_sk(sk);
+
+ info.pr_policy = SCTP_PR_POLICY(sp->default_flags);
+ info.pr_value = sp->default_timetolive;
+ } else {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ if (put_user(len, optlen))
+ goto out;
+
+ if (copy_to_user(optval, &info, 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)
{
@@ -6399,6 +6486,10 @@ static int sctp_getsockopt(struct sock *sk, int level, int optname,
case SCTP_PR_SUPPORTED:
retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
break;
+ case SCTP_DEFAULT_PRINFO:
+ retval = sctp_getsockopt_default_prinfo(sk, len, optval,
+ optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;