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authorKittipon Meesompop <kmeesomp@linux.vnet.ibm.com>2017-08-15 17:02:48 +0200
committerDavid S. Miller <davem@davemloft.net>2017-08-15 10:58:40 -0700
commitaa9bea0b081c015ad5d54a2cced0977917775ed7 (patch)
tree1ed9b8ee6b138234159aebb34ff79cd40168de53 /drivers/s390
parentd65626ad7c999e6e2ab98ea2160e71cf210c366d (diff)
downloadlinux-aa9bea0b081c015ad5d54a2cced0977917775ed7.tar.bz2
s390/qeth: reject multicast rxip addresses
There exist different commands to add unicast and multicast addresses on the OSA card. rxip addresses are always set as unicast addresses and thus just unicast addresses should be allowed. Adding a multicast address now fails and a grace message is generated. Signed-off-by: Kittipon Meesompop <kmeesomp@linux.vnet.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/qeth_l3_sys.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index f2f94f59e0fa..2000ef190e94 100644
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -895,9 +895,26 @@ static ssize_t qeth_l3_dev_rxip_add4_show(struct device *dev,
static int qeth_l3_parse_rxipe(const char *buf, enum qeth_prot_versions proto,
u8 *addr)
{
+ __be32 ipv4_addr;
+ struct in6_addr ipv6_addr;
+
if (qeth_l3_string_to_ipaddr(buf, proto, addr)) {
return -EINVAL;
}
+ if (proto == QETH_PROT_IPV4) {
+ memcpy(&ipv4_addr, addr, sizeof(ipv4_addr));
+ if (ipv4_is_multicast(ipv4_addr)) {
+ QETH_DBF_MESSAGE(2, "multicast rxip not supported.\n");
+ return -EINVAL;
+ }
+ } else if (proto == QETH_PROT_IPV6) {
+ memcpy(&ipv6_addr, addr, sizeof(ipv6_addr));
+ if (ipv6_addr_is_multicast(&ipv6_addr)) {
+ QETH_DBF_MESSAGE(2, "multicast rxip not supported.\n");
+ return -EINVAL;
+ }
+ }
+
return 0;
}