diff options
Diffstat (limited to 'net/ipv4/xfrm4_protocol.c')
| -rw-r--r-- | net/ipv4/xfrm4_protocol.c | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/net/ipv4/xfrm4_protocol.c b/net/ipv4/xfrm4_protocol.c index 8dd0e6ab8606..4ee624d8e66f 100644 --- a/net/ipv4/xfrm4_protocol.c +++ b/net/ipv4/xfrm4_protocol.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* xfrm4_protocol.c - Generic xfrm protocol multiplexer. * * Copyright (C) 2013 secunet Security Networks AG @@ -7,11 +8,6 @@ * * Based on: * net/ipv4/tunnel4.c - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ #include <linux/init.h> @@ -46,7 +42,7 @@ static inline struct xfrm4_protocol __rcu **proto_handlers(u8 protocol) handler != NULL; \ handler = rcu_dereference(handler->next)) \ -int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err) +static int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err) { int ret; struct xfrm4_protocol *handler; @@ -61,7 +57,6 @@ int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err) return 0; } -EXPORT_SYMBOL(xfrm4_rcv_cb); int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) @@ -77,6 +72,14 @@ int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, if (!head) goto out; + if (!skb_dst(skb)) { + const struct iphdr *iph = ip_hdr(skb); + + if (ip_route_input_noref(skb, iph->daddr, iph->saddr, + ip4h_dscp(iph), skb->dev)) + goto drop; + } + for_each_protocol_rcu(*head, handler) if ((ret = handler->input_handler(skb, nexthdr, spi, encap_type)) != -EINVAL) return ret; @@ -84,6 +87,7 @@ int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, out: icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0); +drop: kfree_skb(skb); return 0; } @@ -106,13 +110,15 @@ static int xfrm4_esp_rcv(struct sk_buff *skb) return 0; } -static void xfrm4_esp_err(struct sk_buff *skb, u32 info) +static int xfrm4_esp_err(struct sk_buff *skb, u32 info) { struct xfrm4_protocol *handler; for_each_protocol_rcu(esp4_handlers, handler) if (!handler->err_handler(skb, info)) - break; + return 0; + + return -ENOENT; } static int xfrm4_ah_rcv(struct sk_buff *skb) @@ -132,13 +138,15 @@ static int xfrm4_ah_rcv(struct sk_buff *skb) return 0; } -static void xfrm4_ah_err(struct sk_buff *skb, u32 info) +static int xfrm4_ah_err(struct sk_buff *skb, u32 info) { struct xfrm4_protocol *handler; for_each_protocol_rcu(ah4_handlers, handler) if (!handler->err_handler(skb, info)) - break; + return 0; + + return -ENOENT; } static int xfrm4_ipcomp_rcv(struct sk_buff *skb) @@ -158,34 +166,33 @@ static int xfrm4_ipcomp_rcv(struct sk_buff *skb) return 0; } -static void xfrm4_ipcomp_err(struct sk_buff *skb, u32 info) +static int xfrm4_ipcomp_err(struct sk_buff *skb, u32 info) { struct xfrm4_protocol *handler; for_each_protocol_rcu(ipcomp4_handlers, handler) if (!handler->err_handler(skb, info)) - break; + return 0; + + return -ENOENT; } static const struct net_protocol esp4_protocol = { .handler = xfrm4_esp_rcv, .err_handler = xfrm4_esp_err, .no_policy = 1, - .netns_ok = 1, }; static const struct net_protocol ah4_protocol = { .handler = xfrm4_ah_rcv, .err_handler = xfrm4_ah_err, .no_policy = 1, - .netns_ok = 1, }; static const struct net_protocol ipcomp4_protocol = { .handler = xfrm4_ipcomp_rcv, .err_handler = xfrm4_ipcomp_err, .no_policy = 1, - .netns_ok = 1, }; static const struct xfrm_input_afinfo xfrm4_input_afinfo = { @@ -297,4 +304,3 @@ void __init xfrm4_protocol_init(void) { xfrm_input_register_afinfo(&xfrm4_input_afinfo); } -EXPORT_SYMBOL(xfrm4_protocol_init); |