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Commit aa9bea0b authored by Kittipon Meesompop's avatar Kittipon Meesompop Committed by David S. Miller
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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: default avatarKittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: default avatarJulian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d65626ad

drivers/s390/net/qeth_l3_sys.c

+17 −0
Original line number Diff line number Diff line
@@ -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;

}