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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/ipv4/xfrm4_policy.c
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@@ -12,12 +12,10 @@
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 #include <linux/err.h>
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 #include <linux/kernel.h>
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 #include <linux/inetdevice.h>
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-#include <linux/if_tunnel.h>
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 #include <net/dst.h>
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 #include <net/xfrm.h>
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 #include <net/ip.h>
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 #include <net/l3mdev.h>
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-#include <net/inet_ecn.h>
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 static struct dst_entry *__xfrm4_dst_lookup(struct net *net, struct flowi4 *fl4,
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 					    int tos, int oif,
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@@ -70,17 +68,6 @@
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 	return 0;
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 }
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-static int xfrm4_get_tos(const struct flowi *fl)
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-{
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-	return IPTOS_RT_MASK & fl->u.ip4.flowi4_tos; /* Strip ECN bits */
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-}
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-
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-static int xfrm4_init_path(struct xfrm_dst *path, struct dst_entry *dst,
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-			   int nfheader_len)
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-{
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-	return 0;
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-}
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-
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 static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
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 			  const struct flowi *fl)
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 {
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@@ -98,128 +85,18 @@
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 	xdst->u.rt.rt_flags = rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST |
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 					      RTCF_LOCAL);
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 	xdst->u.rt.rt_type = rt->rt_type;
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-	xdst->u.rt.rt_gateway = rt->rt_gateway;
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 	xdst->u.rt.rt_uses_gateway = rt->rt_uses_gateway;
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+	xdst->u.rt.rt_gw_family = rt->rt_gw_family;
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+	if (rt->rt_gw_family == AF_INET)
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+		xdst->u.rt.rt_gw4 = rt->rt_gw4;
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+	else if (rt->rt_gw_family == AF_INET6)
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+		xdst->u.rt.rt_gw6 = rt->rt_gw6;
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 	xdst->u.rt.rt_pmtu = rt->rt_pmtu;
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 	xdst->u.rt.rt_mtu_locked = rt->rt_mtu_locked;
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 	INIT_LIST_HEAD(&xdst->u.rt.rt_uncached);
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 	rt_add_uncached_list(&xdst->u.rt);
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 	return 0;
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-}
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-
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-static void
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-_decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
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-{
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-	const struct iphdr *iph = ip_hdr(skb);
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-	int ihl = iph->ihl;
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-	u8 *xprth = skb_network_header(skb) + ihl * 4;
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-	struct flowi4 *fl4 = &fl->u.ip4;
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-	int oif = 0;
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-
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-	if (skb_dst(skb))
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-		oif = skb_dst(skb)->dev->ifindex;
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-
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-	memset(fl4, 0, sizeof(struct flowi4));
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-	fl4->flowi4_mark = skb->mark;
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-	fl4->flowi4_oif = reverse ? skb->skb_iif : oif;
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-
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-	fl4->flowi4_proto = iph->protocol;
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-	fl4->daddr = reverse ? iph->saddr : iph->daddr;
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-	fl4->saddr = reverse ? iph->daddr : iph->saddr;
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-	fl4->flowi4_tos = iph->tos & ~INET_ECN_MASK;
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-
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-	if (!ip_is_fragment(iph)) {
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-		switch (iph->protocol) {
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-		case IPPROTO_UDP:
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-		case IPPROTO_UDPLITE:
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-		case IPPROTO_TCP:
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-		case IPPROTO_SCTP:
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-		case IPPROTO_DCCP:
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-			if (xprth + 4 < skb->data ||
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-			    pskb_may_pull(skb, xprth + 4 - skb->data)) {
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-				__be16 *ports;
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-
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-				xprth = skb_network_header(skb) + ihl * 4;
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-				ports = (__be16 *)xprth;
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-
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-				fl4->fl4_sport = ports[!!reverse];
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-				fl4->fl4_dport = ports[!reverse];
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-			}
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-			break;
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-
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-		case IPPROTO_ICMP:
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-			if (xprth + 2 < skb->data ||
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-			    pskb_may_pull(skb, xprth + 2 - skb->data)) {
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-				u8 *icmp;
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-
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-				xprth = skb_network_header(skb) + ihl * 4;
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-				icmp = xprth;
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-
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-				fl4->fl4_icmp_type = icmp[0];
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-				fl4->fl4_icmp_code = icmp[1];
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-			}
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-			break;
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-
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-		case IPPROTO_ESP:
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-			if (xprth + 4 < skb->data ||
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-			    pskb_may_pull(skb, xprth + 4 - skb->data)) {
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-				__be32 *ehdr;
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-
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-				xprth = skb_network_header(skb) + ihl * 4;
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-				ehdr = (__be32 *)xprth;
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-
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-				fl4->fl4_ipsec_spi = ehdr[0];
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-			}
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-			break;
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-
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-		case IPPROTO_AH:
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-			if (xprth + 8 < skb->data ||
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-			    pskb_may_pull(skb, xprth + 8 - skb->data)) {
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-				__be32 *ah_hdr;
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-
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-				xprth = skb_network_header(skb) + ihl * 4;
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-				ah_hdr = (__be32 *)xprth;
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-
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-				fl4->fl4_ipsec_spi = ah_hdr[1];
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-			}
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-			break;
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-
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-		case IPPROTO_COMP:
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-			if (xprth + 4 < skb->data ||
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-			    pskb_may_pull(skb, xprth + 4 - skb->data)) {
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-				__be16 *ipcomp_hdr;
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-
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-				xprth = skb_network_header(skb) + ihl * 4;
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-				ipcomp_hdr = (__be16 *)xprth;
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-
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-				fl4->fl4_ipsec_spi = htonl(ntohs(ipcomp_hdr[1]));
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-			}
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-			break;
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-
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-		case IPPROTO_GRE:
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-			if (xprth + 12 < skb->data ||
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-			    pskb_may_pull(skb, xprth + 12 - skb->data)) {
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-				__be16 *greflags;
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-				__be32 *gre_hdr;
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-
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-				xprth = skb_network_header(skb) + ihl * 4;
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-				greflags = (__be16 *)xprth;
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-				gre_hdr = (__be32 *)xprth;
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-
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-				if (greflags[0] & GRE_KEY) {
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-					if (greflags[0] & GRE_CSUM)
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-						gre_hdr++;
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-					fl4->fl4_gre_key = gre_hdr[1];
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-				}
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-			}
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-			break;
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-
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-		default:
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-			fl4->fl4_ipsec_spi = 0;
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-			break;
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-		}
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-	}
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 }
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 static void xfrm4_update_pmtu(struct dst_entry *dst, struct sock *sk,
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@@ -275,9 +152,6 @@
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 	.dst_ops =		&xfrm4_dst_ops_template,
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 	.dst_lookup =		xfrm4_dst_lookup,
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 	.get_saddr =		xfrm4_get_saddr,
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-	.decode_session =	_decode_session4,
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-	.get_tos =		xfrm4_get_tos,
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-	.init_path =		xfrm4_init_path,
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 	.fill_dst =		xfrm4_fill_dst,
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 	.blackhole_route =	ipv4_blackhole_route,
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 };