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

[Al Viro]

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

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 8206047d70b6..3c2c6cd3933b 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 a0e50cc57e54..96e3f603c8d8 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
-- 
2.11.0