summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--include/uapi/linux/sctp.h29
-rw-r--r--net/sctp/socket.c91
2 files changed, 120 insertions, 0 deletions
diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h
index aa08906f292d..984cf2e9a61d 100644
--- a/include/uapi/linux/sctp.h
+++ b/include/uapi/linux/sctp.h
@@ -113,6 +113,29 @@ typedef __s32 sctp_assoc_t;
#define SCTP_SOCKOPT_CONNECTX3 111 /* CONNECTX requests (updated) */
#define SCTP_GET_ASSOC_STATS 112 /* Read only */
#define SCTP_PR_SUPPORTED 113
+#define SCTP_DEFAULT_PRINFO 114
+
+/* PR-SCTP policies */
+#define SCTP_PR_SCTP_NONE 0x0000
+#define SCTP_PR_SCTP_TTL 0x0010
+#define SCTP_PR_SCTP_RTX 0x0020
+#define SCTP_PR_SCTP_PRIO 0x0030
+#define SCTP_PR_SCTP_MAX SCTP_PR_SCTP_PRIO
+#define SCTP_PR_SCTP_MASK 0x0030
+
+#define __SCTP_PR_INDEX(x) ((x >> 4) - 1)
+#define SCTP_PR_INDEX(x) __SCTP_PR_INDEX(SCTP_PR_SCTP_ ## x)
+
+#define SCTP_PR_POLICY(x) ((x) & SCTP_PR_SCTP_MASK)
+#define SCTP_PR_SET_POLICY(flags, x) \
+ do { \
+ flags &= ~SCTP_PR_SCTP_MASK; \
+ flags |= x; \
+ } while (0)
+
+#define SCTP_PR_TTL_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_TTL)
+#define SCTP_PR_RTX_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_RTX)
+#define SCTP_PR_PRIO_ENABLED(x) (SCTP_PR_POLICY(x) == SCTP_PR_SCTP_PRIO)
/* These are bit fields for msghdr->msg_flags. See section 5.1. */
/* On user space Linux, these live in <bits/socket.h> as an enum. */
@@ -903,4 +926,10 @@ struct sctp_paddrthlds {
__u16 spt_pathpfthld;
};
+struct sctp_default_prinfo {
+ sctp_assoc_t pr_assoc_id;
+ __u32 pr_value;
+ __u16 pr_policy;
+};
+
#endif /* _UAPI_SCTP_H */
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;