xref: /linux/net/ipv4/netlink.c (revision 58e16d792a6a8c6b750f637a4649967fcac853dc)
1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/netlink.h>
3 #include <linux/rtnetlink.h>
4 #include <linux/types.h>
5 #include <net/net_namespace.h>
6 #include <net/netlink.h>
7 #include <linux/in6.h>
8 #include <net/ip.h>
9 
rtm_getroute_parse_ip_proto(struct nlattr * attr,u8 * ip_proto,u8 family,struct netlink_ext_ack * extack)10 int rtm_getroute_parse_ip_proto(struct nlattr *attr, u8 *ip_proto, u8 family,
11 				struct netlink_ext_ack *extack)
12 {
13 	*ip_proto = nla_get_u8(attr);
14 
15 	switch (*ip_proto) {
16 	case IPPROTO_TCP:
17 	case IPPROTO_UDP:
18 		return 0;
19 	case IPPROTO_ICMP:
20 		if (family != AF_INET)
21 			break;
22 		return 0;
23 #if IS_ENABLED(CONFIG_IPV6)
24 	case IPPROTO_ICMPV6:
25 		if (family != AF_INET6)
26 			break;
27 		return 0;
28 #endif
29 	}
30 	NL_SET_ERR_MSG(extack, "Unsupported ip proto");
31 	return -EOPNOTSUPP;
32 }
33 EXPORT_SYMBOL_GPL(rtm_getroute_parse_ip_proto);
34