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