[02/19] compat_ip{,v6}_setsockopt(): enumerate MCAST_... options explicitly

Message ID 20200511044553.1365660-2-viro@ZenIV.linux.org.uk
State New
Headers show
Series
  • Untitled series #41614
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Commit Message

Al Viro May 11, 2020, 4:45 a.m.
From: Al Viro <viro@zeniv.linux.org.uk>

We want to check if optname is among the MCAST_... ones; do that as
an explicit switch.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 net/ipv4/ip_sockglue.c   | 10 +++++++++-
 net/ipv6/ipv6_sockglue.c | 10 +++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

Patch

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index aa3fd61818c4..8f550cf4c1c0 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -1272,9 +1272,17 @@  int compat_ip_setsockopt(struct sock *sk, int level, int optname,
 	if (level != SOL_IP)
 		return -ENOPROTOOPT;
 
-	if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
+	switch (optname) {
+	case MCAST_JOIN_GROUP:
+	case MCAST_LEAVE_GROUP:
+	case MCAST_JOIN_SOURCE_GROUP:
+	case MCAST_LEAVE_SOURCE_GROUP:
+	case MCAST_BLOCK_SOURCE:
+	case MCAST_UNBLOCK_SOURCE:
+	case MCAST_MSFILTER:
 		return compat_mc_setsockopt(sk, level, optname, optval, optlen,
 			ip_setsockopt);
+	}
 
 	err = do_ip_setsockopt(sk, level, optname, optval, optlen);
 #ifdef CONFIG_NETFILTER
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 18d05403d3b5..1b4ad4f8dc42 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -973,9 +973,17 @@  int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	if (level != SOL_IPV6)
 		return -ENOPROTOOPT;
 
-	if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
+	switch (optname) {
+	case MCAST_JOIN_GROUP:
+	case MCAST_LEAVE_GROUP:
+	case MCAST_JOIN_SOURCE_GROUP:
+	case MCAST_LEAVE_SOURCE_GROUP:
+	case MCAST_BLOCK_SOURCE:
+	case MCAST_UNBLOCK_SOURCE:
+	case MCAST_MSFILTER:
 		return compat_mc_setsockopt(sk, level, optname, optval, optlen,
 			ipv6_setsockopt);
+	}
 
 	err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
 #ifdef CONFIG_NETFILTER