diff options
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv6/ip6_output.c | 68 | ||||
-rw-r--r-- | net/ipv6/ip6_udp_tunnel.c | 69 |
2 files changed, 69 insertions, 68 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 571c10fb00b1..3c7de89d6755 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1283,74 +1283,6 @@ struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6, } EXPORT_SYMBOL_GPL(ip6_sk_dst_lookup_flow); -/** - * ip6_dst_lookup_tunnel - perform route lookup on tunnel - * @skb: Packet for which lookup is done - * @dev: Tunnel device - * @net: Network namespace of tunnel device - * @sock: Socket which provides route info - * @saddr: Memory to store the src ip address - * @info: Tunnel information - * @protocol: IP protocol - * @use_cache: Flag to enable cache usage - * This function performs a route lookup on a tunnel - * - * It returns a valid dst pointer and stores src address to be used in - * tunnel in param saddr on success, else a pointer encoded error code. - */ - -struct dst_entry *ip6_dst_lookup_tunnel(struct sk_buff *skb, - struct net_device *dev, - struct net *net, - struct socket *sock, - struct in6_addr *saddr, - const struct ip_tunnel_info *info, - u8 protocol, - bool use_cache) -{ - struct dst_entry *dst = NULL; -#ifdef CONFIG_DST_CACHE - struct dst_cache *dst_cache; -#endif - struct flowi6 fl6; - __u8 prio; - -#ifdef CONFIG_DST_CACHE - dst_cache = (struct dst_cache *)&info->dst_cache; - if (use_cache) { - dst = dst_cache_get_ip6(dst_cache, saddr); - if (dst) - return dst; - } -#endif - memset(&fl6, 0, sizeof(fl6)); - fl6.flowi6_mark = skb->mark; - fl6.flowi6_proto = protocol; - fl6.daddr = info->key.u.ipv6.dst; - fl6.saddr = info->key.u.ipv6.src; - prio = info->key.tos; - fl6.flowlabel = ip6_make_flowinfo(prio, info->key.label); - - dst = ipv6_stub->ipv6_dst_lookup_flow(net, sock->sk, &fl6, - NULL); - if (IS_ERR(dst)) { - netdev_dbg(dev, "no route to %pI6\n", &fl6.daddr); - return ERR_PTR(-ENETUNREACH); - } - if (dst->dev == dev) { /* is this necessary? */ - netdev_dbg(dev, "circular route to %pI6\n", &fl6.daddr); - dst_release(dst); - return ERR_PTR(-ELOOP); - } -#ifdef CONFIG_DST_CACHE - if (use_cache) - dst_cache_set_ip6(dst_cache, dst, &fl6.saddr); -#endif - *saddr = fl6.saddr; - return dst; -} -EXPORT_SYMBOL_GPL(ip6_dst_lookup_tunnel); - static inline struct ipv6_opt_hdr *ip6_opt_dup(struct ipv6_opt_hdr *src, gfp_t gfp) { diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c index 70d38705c92f..fc122abf6b75 100644 --- a/net/ipv6/ip6_udp_tunnel.c +++ b/net/ipv6/ip6_udp_tunnel.c @@ -1,3 +1,4 @@ + // SPDX-License-Identifier: GPL-2.0-only #include <linux/module.h> #include <linux/errno.h> @@ -112,4 +113,72 @@ int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, } EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb); +/** + * udp_tunnel6_dst_lookup - perform route lookup on UDP tunnel + * @skb: Packet for which lookup is done + * @dev: Tunnel device + * @net: Network namespace of tunnel device + * @sock: Socket which provides route info + * @saddr: Memory to store the src ip address + * @info: Tunnel information + * @protocol: IP protocol + * @use_cache: Flag to enable cache usage + * This function performs a route lookup on a UDP tunnel + * + * It returns a valid dst pointer and stores src address to be used in + * tunnel in param saddr on success, else a pointer encoded error code. + */ + +struct dst_entry *udp_tunnel6_dst_lookup(struct sk_buff *skb, + struct net_device *dev, + struct net *net, + struct socket *sock, + struct in6_addr *saddr, + const struct ip_tunnel_info *info, + u8 protocol, + bool use_cache) +{ + struct dst_entry *dst = NULL; +#ifdef CONFIG_DST_CACHE + struct dst_cache *dst_cache; +#endif + struct flowi6 fl6; + __u8 prio; + +#ifdef CONFIG_DST_CACHE + dst_cache = (struct dst_cache *)&info->dst_cache; + if (use_cache) { + dst = dst_cache_get_ip6(dst_cache, saddr); + if (dst) + return dst; + } +#endif + memset(&fl6, 0, sizeof(fl6)); + fl6.flowi6_mark = skb->mark; + fl6.flowi6_proto = protocol; + fl6.daddr = info->key.u.ipv6.dst; + fl6.saddr = info->key.u.ipv6.src; + prio = info->key.tos; + fl6.flowlabel = ip6_make_flowinfo(prio, info->key.label); + + dst = ipv6_stub->ipv6_dst_lookup_flow(net, sock->sk, &fl6, + NULL); + if (IS_ERR(dst)) { + netdev_dbg(dev, "no route to %pI6\n", &fl6.daddr); + return ERR_PTR(-ENETUNREACH); + } + if (dst->dev == dev) { /* is this necessary? */ + netdev_dbg(dev, "circular route to %pI6\n", &fl6.daddr); + dst_release(dst); + return ERR_PTR(-ELOOP); + } +#ifdef CONFIG_DST_CACHE + if (use_cache) + dst_cache_set_ip6(dst_cache, dst, &fl6.saddr); +#endif + *saddr = fl6.saddr; + return dst; +} +EXPORT_SYMBOL_GPL(udp_tunnel6_dst_lookup); + MODULE_LICENSE("GPL"); |