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-rw-r--r--net/ipv4/Kconfig29
-rw-r--r--net/ipv4/Makefile3
-rw-r--r--net/ipv4/esp4_offload.c50
-rw-r--r--net/ipv4/ip_vti.c66
-rw-r--r--net/ipv4/xfrm4_mode_beet.c155
-rw-r--r--net/ipv4/xfrm4_mode_transport.c114
-rw-r--r--net/ipv4/xfrm4_mode_tunnel.c152
-rw-r--r--net/ipv4/xfrm4_output.c27
-rw-r--r--net/ipv4/xfrm4_policy.c127
-rw-r--r--net/ipv4/xfrm4_protocol.c3
10 files changed, 84 insertions, 642 deletions
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 32cae39cdff6..8108e97d4285 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -304,7 +304,7 @@ config NET_IPVTI
tristate "Virtual (secure) IP: tunneling"
select INET_TUNNEL
select NET_IP_TUNNEL
- depends on INET_XFRM_MODE_TUNNEL
+ select XFRM
---help---
Tunneling means encapsulating data of one protocol type within
another protocol and sending it over a channel that understands the
@@ -396,33 +396,6 @@ config INET_TUNNEL
tristate
default n
-config INET_XFRM_MODE_TRANSPORT
- tristate "IP: IPsec transport mode"
- default y
- select XFRM
- ---help---
- Support for IPsec transport mode.
-
- If unsure, say Y.
-
-config INET_XFRM_MODE_TUNNEL
- tristate "IP: IPsec tunnel mode"
- default y
- select XFRM
- ---help---
- Support for IPsec tunnel mode.
-
- If unsure, say Y.
-
-config INET_XFRM_MODE_BEET
- tristate "IP: IPsec BEET mode"
- default y
- select XFRM
- ---help---
- Support for IPsec BEET mode.
-
- If unsure, say Y.
-
config INET_DIAG
tristate "INET: socket monitoring interface"
default y
diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index 58629314eae9..000a61994c8f 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -37,10 +37,7 @@ obj-$(CONFIG_INET_ESP) += esp4.o
obj-$(CONFIG_INET_ESP_OFFLOAD) += esp4_offload.o
obj-$(CONFIG_INET_IPCOMP) += ipcomp.o
obj-$(CONFIG_INET_XFRM_TUNNEL) += xfrm4_tunnel.o
-obj-$(CONFIG_INET_XFRM_MODE_BEET) += xfrm4_mode_beet.o
obj-$(CONFIG_INET_TUNNEL) += tunnel4.o
-obj-$(CONFIG_INET_XFRM_MODE_TRANSPORT) += xfrm4_mode_transport.o
-obj-$(CONFIG_INET_XFRM_MODE_TUNNEL) += xfrm4_mode_tunnel.o
obj-$(CONFIG_IP_PNP) += ipconfig.o
obj-$(CONFIG_NETFILTER) += netfilter.o netfilter/
obj-$(CONFIG_INET_DIAG) += inet_diag.o
diff --git a/net/ipv4/esp4_offload.c b/net/ipv4/esp4_offload.c
index 8756e0e790d2..b61a8ff558f9 100644
--- a/net/ipv4/esp4_offload.c
+++ b/net/ipv4/esp4_offload.c
@@ -107,6 +107,44 @@ static void esp4_gso_encap(struct xfrm_state *x, struct sk_buff *skb)
xo->proto = proto;
}
+static struct sk_buff *xfrm4_tunnel_gso_segment(struct xfrm_state *x,
+ struct sk_buff *skb,
+ netdev_features_t features)
+{
+ __skb_push(skb, skb->mac_len);
+ return skb_mac_gso_segment(skb, features);
+}
+
+static struct sk_buff *xfrm4_transport_gso_segment(struct xfrm_state *x,
+ struct sk_buff *skb,
+ netdev_features_t features)
+{
+ const struct net_offload *ops;
+ struct sk_buff *segs = ERR_PTR(-EINVAL);
+ struct xfrm_offload *xo = xfrm_offload(skb);
+
+ skb->transport_header += x->props.header_len;
+ ops = rcu_dereference(inet_offloads[xo->proto]);
+ if (likely(ops && ops->callbacks.gso_segment))
+ segs = ops->callbacks.gso_segment(skb, features);
+
+ return segs;
+}
+
+static struct sk_buff *xfrm4_outer_mode_gso_segment(struct xfrm_state *x,
+ struct sk_buff *skb,
+ netdev_features_t features)
+{
+ switch (x->outer_mode.encap) {
+ case XFRM_MODE_TUNNEL:
+ return xfrm4_tunnel_gso_segment(x, skb, features);
+ case XFRM_MODE_TRANSPORT:
+ return xfrm4_transport_gso_segment(x, skb, features);
+ }
+
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
static struct sk_buff *esp4_gso_segment(struct sk_buff *skb,
netdev_features_t features)
{
@@ -138,14 +176,16 @@ static struct sk_buff *esp4_gso_segment(struct sk_buff *skb,
skb->encap_hdr_csum = 1;
- if (!(features & NETIF_F_HW_ESP) || x->xso.dev != skb->dev)
+ if ((!(skb->dev->gso_partial_features & NETIF_F_HW_ESP) &&
+ !(features & NETIF_F_HW_ESP)) || x->xso.dev != skb->dev)
esp_features = features & ~(NETIF_F_SG | NETIF_F_CSUM_MASK);
- else if (!(features & NETIF_F_HW_ESP_TX_CSUM))
+ else if (!(features & NETIF_F_HW_ESP_TX_CSUM) &&
+ !(skb->dev->gso_partial_features & NETIF_F_HW_ESP_TX_CSUM))
esp_features = features & ~NETIF_F_CSUM_MASK;
xo->flags |= XFRM_GSO_SEGMENT;
- return x->outer_mode->gso_segment(x, skb, esp_features);
+ return xfrm4_outer_mode_gso_segment(x, skb, esp_features);
}
static int esp_input_tail(struct xfrm_state *x, struct sk_buff *skb)
@@ -181,7 +221,9 @@ static int esp_xmit(struct xfrm_state *x, struct sk_buff *skb, netdev_features_
if (!xo)
return -EINVAL;
- if (!(features & NETIF_F_HW_ESP) || x->xso.dev != skb->dev) {
+ if ((!(features & NETIF_F_HW_ESP) &&
+ !(skb->dev->gso_partial_features & NETIF_F_HW_ESP)) ||
+ x->xso.dev != skb->dev) {
xo->flags |= CRYPTO_FALLBACK;
hw_offload = false;
}
diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index 68a21bf75dd0..cc5d9c0a8a10 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -50,7 +50,7 @@ static unsigned int vti_net_id __read_mostly;
static int vti_tunnel_init(struct net_device *dev);
static int vti_input(struct sk_buff *skb, int nexthdr, __be32 spi,
- int encap_type)
+ int encap_type, bool update_skb_dev)
{
struct ip_tunnel *tunnel;
const struct iphdr *iph = ip_hdr(skb);
@@ -65,6 +65,9 @@ static int vti_input(struct sk_buff *skb, int nexthdr, __be32 spi,
XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = tunnel;
+ if (update_skb_dev)
+ skb->dev = tunnel->dev;
+
return xfrm_input(skb, nexthdr, spi, encap_type);
}
@@ -74,47 +77,28 @@ drop:
return 0;
}
-static int vti_input_ipip(struct sk_buff *skb, int nexthdr, __be32 spi,
- int encap_type)
+static int vti_input_proto(struct sk_buff *skb, int nexthdr, __be32 spi,
+ int encap_type)
{
- struct ip_tunnel *tunnel;
- const struct iphdr *iph = ip_hdr(skb);
- struct net *net = dev_net(skb->dev);
- struct ip_tunnel_net *itn = net_generic(net, vti_net_id);
-
- tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
- iph->saddr, iph->daddr, 0);
- if (tunnel) {
- if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
- goto drop;
-
- XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = tunnel;
-
- skb->dev = tunnel->dev;
-
- return xfrm_input(skb, nexthdr, spi, encap_type);
- }
-
- return -EINVAL;
-drop:
- kfree_skb(skb);
- return 0;
+ return vti_input(skb, nexthdr, spi, encap_type, false);
}
-static int vti_rcv(struct sk_buff *skb)
+static int vti_rcv(struct sk_buff *skb, __be32 spi, bool update_skb_dev)
{
XFRM_SPI_SKB_CB(skb)->family = AF_INET;
XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
- return vti_input(skb, ip_hdr(skb)->protocol, 0, 0);
+ return vti_input(skb, ip_hdr(skb)->protocol, spi, 0, update_skb_dev);
}
-static int vti_rcv_ipip(struct sk_buff *skb)
+static int vti_rcv_proto(struct sk_buff *skb)
{
- XFRM_SPI_SKB_CB(skb)->family = AF_INET;
- XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
+ return vti_rcv(skb, 0, false);
+}
- return vti_input_ipip(skb, ip_hdr(skb)->protocol, ip_hdr(skb)->saddr, 0);
+static int vti_rcv_tunnel(struct sk_buff *skb)
+{
+ return vti_rcv(skb, ip_hdr(skb)->saddr, true);
}
static int vti_rcv_cb(struct sk_buff *skb, int err)
@@ -123,7 +107,7 @@ static int vti_rcv_cb(struct sk_buff *skb, int err)
struct net_device *dev;
struct pcpu_sw_netstats *tstats;
struct xfrm_state *x;
- struct xfrm_mode *inner_mode;
+ const struct xfrm_mode *inner_mode;
struct ip_tunnel *tunnel = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4;
u32 orig_mark = skb->mark;
int ret;
@@ -142,7 +126,7 @@ static int vti_rcv_cb(struct sk_buff *skb, int err)
x = xfrm_input_state(skb);
- inner_mode = x->inner_mode;
+ inner_mode = &x->inner_mode;
if (x->sel.family == AF_UNSPEC) {
inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
@@ -153,7 +137,7 @@ static int vti_rcv_cb(struct sk_buff *skb, int err)
}
}
- family = inner_mode->afinfo->family;
+ family = inner_mode->family;
skb->mark = be32_to_cpu(tunnel->parms.i_key);
ret = xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family);
@@ -447,31 +431,31 @@ static void __net_init vti_fb_tunnel_init(struct net_device *dev)
}
static struct xfrm4_protocol vti_esp4_protocol __read_mostly = {
- .handler = vti_rcv,
- .input_handler = vti_input,
+ .handler = vti_rcv_proto,
+ .input_handler = vti_input_proto,
.cb_handler = vti_rcv_cb,
.err_handler = vti4_err,
.priority = 100,
};
static struct xfrm4_protocol vti_ah4_protocol __read_mostly = {
- .handler = vti_rcv,
- .input_handler = vti_input,
+ .handler = vti_rcv_proto,
+ .input_handler = vti_input_proto,
.cb_handler = vti_rcv_cb,
.err_handler = vti4_err,
.priority = 100,
};
static struct xfrm4_protocol vti_ipcomp4_protocol __read_mostly = {
- .handler = vti_rcv,
- .input_handler = vti_input,
+ .handler = vti_rcv_proto,
+ .input_handler = vti_input_proto,
.cb_handler = vti_rcv_cb,
.err_handler = vti4_err,
.priority = 100,
};
static struct xfrm_tunnel ipip_handler __read_mostly = {
- .handler = vti_rcv_ipip,
+ .handler = vti_rcv_tunnel,
.err_handler = vti4_err,
.priority = 0,
};
diff --git a/net/ipv4/xfrm4_mode_beet.c b/net/ipv4/xfrm4_mode_beet.c
deleted file mode 100644
index 856d2dfdb44b..000000000000
--- a/net/ipv4/xfrm4_mode_beet.c
+++ /dev/null
@@ -1,155 +0,0 @@
-/*
- * xfrm4_mode_beet.c - BEET mode encapsulation for IPv4.
- *
- * Copyright (c) 2006 Diego Beltrami <diego.beltrami@gmail.com>
- * Miika Komu <miika@iki.fi>
- * Herbert Xu <herbert@gondor.apana.org.au>
- * Abhinav Pathak <abhinav.pathak@hiit.fi>
- * Jeff Ahrenholz <ahrenholz@gmail.com>
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/stringify.h>
-#include <net/dst.h>
-#include <net/ip.h>
-#include <net/xfrm.h>
-
-static void xfrm4_beet_make_header(struct sk_buff *skb)
-{
- struct iphdr *iph = ip_hdr(skb);
-
- iph->ihl = 5;
- iph->version = 4;
-
- iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
- iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
-
- iph->id = XFRM_MODE_SKB_CB(skb)->id;
- iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
- iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
-}
-
-/* Add encapsulation header.
- *
- * The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt.
- */
-static int xfrm4_beet_output(struct xfrm_state *x, struct sk_buff *skb)
-{
- struct ip_beet_phdr *ph;
- struct iphdr *top_iph;
- int hdrlen, optlen;
-
- hdrlen = 0;
- optlen = XFRM_MODE_SKB_CB(skb)->optlen;
- if (unlikely(optlen))
- hdrlen += IPV4_BEET_PHMAXLEN - (optlen & 4);
-
- skb_set_network_header(skb, -x->props.header_len -
- hdrlen + (XFRM_MODE_SKB_CB(skb)->ihl - sizeof(*top_iph)));
- if (x->sel.family != AF_INET6)
- skb->network_header += IPV4_BEET_PHMAXLEN;
- skb->mac_header = skb->network_header +
- offsetof(struct iphdr, protocol);
- skb->transport_header = skb->network_header + sizeof(*top_iph);
-
- xfrm4_beet_make_header(skb);
-
- ph = __skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl - hdrlen);
-
- top_iph = ip_hdr(skb);
-
- if (unlikely(optlen)) {
- BUG_ON(optlen < 0);
-
- ph->padlen = 4 - (optlen & 4);
- ph->hdrlen = optlen / 8;
- ph->nexthdr = top_iph->protocol;
- if (ph->padlen)
- memset(ph + 1, IPOPT_NOP, ph->padlen);
-
- top_iph->protocol = IPPROTO_BEETPH;
- top_iph->ihl = sizeof(struct iphdr) / 4;
- }
-
- top_iph->saddr = x->props.saddr.a4;
- top_iph->daddr = x->id.daddr.a4;
-
- return 0;
-}
-
-static int xfrm4_beet_input(struct xfrm_state *x, struct sk_buff *skb)
-{
- struct iphdr *iph;
- int optlen = 0;
- int err = -EINVAL;
-
- if (unlikely(XFRM_MODE_SKB_CB(skb)->protocol == IPPROTO_BEETPH)) {
- struct ip_beet_phdr *ph;
- int phlen;
-
- if (!pskb_may_pull(skb, sizeof(*ph)))
- goto out;
-
- ph = (struct ip_beet_phdr *)skb->data;
-
- phlen = sizeof(*ph) + ph->padlen;
- optlen = ph->hdrlen * 8 + (IPV4_BEET_PHMAXLEN - phlen);
- if (optlen < 0 || optlen & 3 || optlen > 250)
- goto out;
-
- XFRM_MODE_SKB_CB(skb)->protocol = ph->nexthdr;
-
- if (!pskb_may_pull(skb, phlen))
- goto out;
- __skb_pull(skb, phlen);
- }
-
- skb_push(skb, sizeof(*iph));
- skb_reset_network_header(skb);
- skb_mac_header_rebuild(skb);
-
- xfrm4_beet_make_header(skb);
-
- iph = ip_hdr(skb);
-
- iph->ihl += optlen / 4;
- iph->tot_len = htons(skb->len);
- iph->daddr = x->sel.daddr.a4;
- iph->saddr = x->sel.saddr.a4;
- iph->check = 0;
- iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl);
- err = 0;
-out:
- return err;
-}
-
-static struct xfrm_mode xfrm4_beet_mode = {
- .input2 = xfrm4_beet_input,
- .input = xfrm_prepare_input,
- .output2 = xfrm4_beet_output,
- .output = xfrm4_prepare_output,
- .owner = THIS_MODULE,
- .encap = XFRM_MODE_BEET,
- .flags = XFRM_MODE_FLAG_TUNNEL,
-};
-
-static int __init xfrm4_beet_init(void)
-{
- return xfrm_register_mode(&xfrm4_beet_mode, AF_INET);
-}
-
-static void __exit xfrm4_beet_exit(void)
-{
- int err;
-
- err = xfrm_unregister_mode(&xfrm4_beet_mode, AF_INET);
- BUG_ON(err);
-}
-
-module_init(xfrm4_beet_init);
-module_exit(xfrm4_beet_exit);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_BEET);
diff --git a/net/ipv4/xfrm4_mode_transport.c b/net/ipv4/xfrm4_mode_transport.c
deleted file mode 100644
index 1ad2c2c4e250..000000000000
--- a/net/ipv4/xfrm4_mode_transport.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * xfrm4_mode_transport.c - Transport mode encapsulation for IPv4.
- *
- * Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/stringify.h>
-#include <net/dst.h>
-#include <net/ip.h>
-#include <net/xfrm.h>
-#include <net/protocol.h>
-
-/* Add encapsulation header.
- *
- * The IP header will be moved forward to make space for the encapsulation
- * header.
- */
-static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
-{
- struct iphdr *iph = ip_hdr(skb);
- int ihl = iph->ihl * 4;
-
- skb_set_inner_transport_header(skb, skb_transport_offset(skb));
-
- skb_set_network_header(skb, -x->props.header_len);
- skb->mac_header = skb->network_header +
- offsetof(struct iphdr, protocol);
- skb->transport_header = skb->network_header + ihl;
- __skb_pull(skb, ihl);
- memmove(skb_network_header(skb), iph, ihl);
- return 0;
-}
-
-/* Remove encapsulation header.
- *
- * The IP header will be moved over the top of the encapsulation header.
- *
- * On entry, skb->h shall point to where the IP header should be and skb->nh
- * shall be set to where the IP header currently is. skb->data shall point
- * to the start of the payload.
- */
-static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
-{
- int ihl = skb->data - skb_transport_header(skb);
-
- if (skb->transport_header != skb->network_header) {
- memmove(skb_transport_header(skb),
- skb_network_header(skb), ihl);
- skb->network_header = skb->transport_header;
- }
- ip_hdr(skb)->tot_len = htons(skb->len + ihl);
- skb_reset_transport_header(skb);
- return 0;
-}
-
-static struct sk_buff *xfrm4_transport_gso_segment(struct xfrm_state *x,
- struct sk_buff *skb,
- netdev_features_t features)
-{
- const struct net_offload *ops;
- struct sk_buff *segs = ERR_PTR(-EINVAL);
- struct xfrm_offload *xo = xfrm_offload(skb);
-
- skb->transport_header += x->props.header_len;
- ops = rcu_dereference(inet_offloads[xo->proto]);
- if (likely(ops && ops->callbacks.gso_segment))
- segs = ops->callbacks.gso_segment(skb, features);
-
- return segs;
-}
-
-static void xfrm4_transport_xmit(struct xfrm_state *x, struct sk_buff *skb)
-{
- struct xfrm_offload *xo = xfrm_offload(skb);
-
- skb_reset_mac_len(skb);
- pskb_pull(skb, skb->mac_len + sizeof(struct iphdr) + x->props.header_len);
-
- if (xo->flags & XFRM_GSO_SEGMENT) {
- skb_reset_transport_header(skb);
- skb->transport_header -= x->props.header_len;
- }
-}
-
-static struct xfrm_mode xfrm4_transport_mode = {
- .input = xfrm4_transport_input,
- .output = xfrm4_transport_output,
- .gso_segment = xfrm4_transport_gso_segment,
- .xmit = xfrm4_transport_xmit,
- .owner = THIS_MODULE,
- .encap = XFRM_MODE_TRANSPORT,
-};
-
-static int __init xfrm4_transport_init(void)
-{
- return xfrm_register_mode(&xfrm4_transport_mode, AF_INET);
-}
-
-static void __exit xfrm4_transport_exit(void)
-{
- int err;
-
- err = xfrm_unregister_mode(&xfrm4_transport_mode, AF_INET);
- BUG_ON(err);
-}
-
-module_init(xfrm4_transport_init);
-module_exit(xfrm4_transport_exit);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TRANSPORT);
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
deleted file mode 100644
index 2a9764bd1719..000000000000
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
- * xfrm4_mode_tunnel.c - Tunnel mode encapsulation for IPv4.
- *
- * Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
- */
-
-#include <linux/gfp.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/stringify.h>
-#include <net/dst.h>
-#include <net/inet_ecn.h>
-#include <net/ip.h>
-#include <net/xfrm.h>
-
-static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
-{
- struct iphdr *inner_iph = ipip_hdr(skb);
-
- if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos))
- IP_ECN_set_ce(inner_iph);
-}
-
-/* Add encapsulation header.
- *
- * The top IP header will be constructed per RFC 2401.
- */
-static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
-{
- struct dst_entry *dst = skb_dst(skb);
- struct iphdr *top_iph;
- int flags;
-
- skb_set_inner_network_header(skb, skb_network_offset(skb));
- skb_set_inner_transport_header(skb, skb_transport_offset(skb));
-
- skb_set_network_header(skb, -x->props.header_len);
- skb->mac_header = skb->network_header +
- offsetof(struct iphdr, protocol);
- skb->transport_header = skb->network_header + sizeof(*top_iph);
- top_iph = ip_hdr(skb);
-
- top_iph->ihl = 5;
- top_iph->version = 4;
-
- top_iph->protocol = xfrm_af2proto(skb_dst(skb)->ops->family);
-
- /* DS disclosing depends on XFRM_SA_XFLAG_DONT_ENCAP_DSCP */
- if (x->props.extra_flags & XFRM_SA_XFLAG_DONT_ENCAP_DSCP)
- top_iph->tos = 0;
- else
- top_iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
- top_iph->tos = INET_ECN_encapsulate(top_iph->tos,
- XFRM_MODE_SKB_CB(skb)->tos);
-
- flags = x->props.flags;
- if (flags & XFRM_STATE_NOECN)
- IP_ECN_clear(top_iph);
-
- top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ?
- 0 : (XFRM_MODE_SKB_CB(skb)->frag_off & htons(IP_DF));
-
- top_iph->ttl = ip4_dst_hoplimit(xfrm_dst_child(dst));
-
- top_iph->saddr = x->props.saddr.a4;
- top_iph->daddr = x->id.daddr.a4;
- ip_select_ident(dev_net(dst->dev), skb, NULL);
-
- return 0;
-}
-
-static int xfrm4_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
-{
- int err = -EINVAL;
-
- if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPIP)
- goto out;
-
- if (!pskb_may_pull(skb, sizeof(struct iphdr)))
- goto out;
-
- err = skb_unclone(skb, GFP_ATOMIC);
- if (err)
- goto out;
-
- if (x->props.flags & XFRM_STATE_DECAP_DSCP)
- ipv4_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipip_hdr(skb));
- if (!(x->props.flags & XFRM_STATE_NOECN))
- ipip_ecn_decapsulate(skb);
-
- skb_reset_network_header(skb);
- skb_mac_header_rebuild(skb);
- if (skb->mac_len)
- eth_hdr(skb)->h_proto = skb->protocol;
-
- err = 0;
-
-out:
- return err;
-}
-
-static struct sk_buff *xfrm4_mode_tunnel_gso_segment(struct xfrm_state *x,
- struct sk_buff *skb,
- netdev_features_t features)
-{
- __skb_push(skb, skb->mac_len);
- return skb_mac_gso_segment(skb, features);
-}
-
-static void xfrm4_mode_tunnel_xmit(struct xfrm_state *x, struct sk_buff *skb)
-{
- struct xfrm_offload *xo = xfrm_offload(skb);
-
- if (xo->flags & XFRM_GSO_SEGMENT)
- skb->transport_header = skb->network_header +
- sizeof(struct iphdr);
-
- skb_reset_mac_len(skb);
- pskb_pull(skb, skb->mac_len + x->props.header_len);
-}
-
-static struct xfrm_mode xfrm4_tunnel_mode = {
- .input2 = xfrm4_mode_tunnel_input,
- .input = xfrm_prepare_input,
- .output2 = xfrm4_mode_tunnel_output,
- .output = xfrm4_prepare_output,
- .gso_segment = xfrm4_mode_tunnel_gso_segment,
- .xmit = xfrm4_mode_tunnel_xmit,
- .owner = THIS_MODULE,
- .encap = XFRM_MODE_TUNNEL,
- .flags = XFRM_MODE_FLAG_TUNNEL,
-};
-
-static int __init xfrm4_mode_tunnel_init(void)
-{
- return xfrm_register_mode(&xfrm4_tunnel_mode, AF_INET);
-}
-
-static void __exit xfrm4_mode_tunnel_exit(void)
-{
- int err;
-
- err = xfrm_unregister_mode(&xfrm4_tunnel_mode, AF_INET);
- BUG_ON(err);
-}
-
-module_init(xfrm4_mode_tunnel_init);
-module_exit(xfrm4_mode_tunnel_exit);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TUNNEL);
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index be980c195fc5..9bb8905088c7 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -58,21 +58,6 @@ int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb)
return xfrm4_extract_header(skb);
}
-int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
-{
- int err;
-
- err = xfrm_inner_extract_output(x, skb);
- if (err)
- return err;
-
- IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
- skb->protocol = htons(ETH_P_IP);
-
- return x->outer_mode->output2(x, skb);
-}
-EXPORT_SYMBOL(xfrm4_prepare_output);
-
int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb)
{
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
@@ -87,6 +72,8 @@ int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb)
static int __xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct xfrm_state *x = skb_dst(skb)->xfrm;
+ const struct xfrm_state_afinfo *afinfo;
+ int ret = -EAFNOSUPPORT;
#ifdef CONFIG_NETFILTER
if (!x) {
@@ -95,7 +82,15 @@ static int __xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
}
#endif
- return x->outer_mode->afinfo->output_finish(sk, skb);
+ rcu_read_lock();
+ afinfo = xfrm_state_afinfo_get_rcu(x->outer_mode.family);
+ if (likely(afinfo))
+ ret = afinfo->output_finish(sk, skb);
+ else
+ kfree_skb(skb);
+ rcu_read_unlock();
+
+ return ret;
}
int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 72d19b1838ed..cdef8f9a3b01 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -12,7 +12,6 @@
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/inetdevice.h>
-#include <linux/if_tunnel.h>
#include <net/dst.h>
#include <net/xfrm.h>
#include <net/ip.h>
@@ -69,17 +68,6 @@ static int xfrm4_get_saddr(struct net *net, int oif,
return 0;
}
-static int xfrm4_get_tos(const struct flowi *fl)
-{
- return IPTOS_RT_MASK & fl->u.ip4.flowi4_tos; /* Strip ECN bits */
-}
-
-static int xfrm4_init_path(struct xfrm_dst *path, struct dst_entry *dst,
- int nfheader_len)
-{
- return 0;
-}
-
static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
const struct flowi *fl)
{
@@ -110,118 +98,6 @@ static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
return 0;
}
-static void
-_decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
-{
- const struct iphdr *iph = ip_hdr(skb);
- u8 *xprth = skb_network_header(skb) + iph->ihl * 4;
- struct flowi4 *fl4 = &fl->u.ip4;
- int oif = 0;
-
- if (skb_dst(skb))
- oif = skb_dst(skb)->dev->ifindex;
-
- memset(fl4, 0, sizeof(struct flowi4));
- fl4->flowi4_mark = skb->mark;
- fl4->flowi4_oif = reverse ? skb->skb_iif : oif;
-
- if (!ip_is_fragment(iph)) {
- switch (iph->protocol) {
- case IPPROTO_UDP:
- case IPPROTO_UDPLITE:
- case IPPROTO_TCP:
- case IPPROTO_SCTP:
- case IPPROTO_DCCP:
- if (xprth + 4 < skb->data ||
- pskb_may_pull(skb, xprth + 4 - skb->data)) {
- __be16 *ports;
-
- xprth = skb_network_header(skb) + iph->ihl * 4;
- ports = (__be16 *)xprth;
-
- fl4->fl4_sport = ports[!!reverse];
- fl4->fl4_dport = ports[!reverse];
- }
- break;
-
- case IPPROTO_ICMP:
- if (xprth + 2 < skb->data ||
- pskb_may_pull(skb, xprth + 2 - skb->data)) {
- u8 *icmp;
-
- xprth = skb_network_header(skb) + iph->ihl * 4;
- icmp = xprth;
-
- fl4->fl4_icmp_type = icmp[0];
- fl4->fl4_icmp_code = icmp[1];
- }
- break;
-
- case IPPROTO_ESP:
- if (xprth + 4 < skb->data ||
- pskb_may_pull(skb, xprth + 4 - skb->data)) {
- __be32 *ehdr;
-
- xprth = skb_network_header(skb) + iph->ihl * 4;
- ehdr = (__be32 *)xprth;
-
- fl4->fl4_ipsec_spi = ehdr[0];
- }
- break;
-
- case IPPROTO_AH:
- if (xprth + 8 < skb->data ||
- pskb_may_pull(skb, xprth + 8 - skb->data)) {
- __be32 *ah_hdr;
-
- xprth = skb_network_header(skb) + iph->ihl * 4;
- ah_hdr = (__be32 *)xprth;
-
- fl4->fl4_ipsec_spi = ah_hdr[1];
- }
- break;
-
- case IPPROTO_COMP:
- if (xprth + 4 < skb->data ||
- pskb_may_pull(skb, xprth + 4 - skb->data)) {
- __be16 *ipcomp_hdr;
-
- xprth = skb_network_header(skb) + iph->ihl * 4;
- ipcomp_hdr = (__be16 *)xprth;
-
- fl4->fl4_ipsec_spi = htonl(ntohs(ipcomp_hdr[1]));
- }
- break;
-
- case IPPROTO_GRE:
- if (xprth + 12 < skb->data ||
- pskb_may_pull(skb, xprth + 12 - skb->data)) {
- __be16 *greflags;
- __be32 *gre_hdr;
-
- xprth = skb_network_header(skb) + iph->ihl * 4;
- greflags = (__be16 *)xprth;
- gre_hdr = (__be32 *)xprth;
-
- if (greflags[0] & GRE_KEY) {
- if (greflags[0] & GRE_CSUM)
- gre_hdr++;
- fl4->fl4_gre_key = gre_hdr[1];
- }
- }
- break;
-
- default:
- fl4->fl4_ipsec_spi = 0;
- break;
- }
- }
- fl4->flowi4_proto = iph->protocol;
- fl4->daddr = reverse ? iph->saddr : iph->daddr;
- fl4->saddr = reverse ? iph->daddr : iph->saddr;
- fl4->flowi4_tos = iph->tos;
-}
-
static void xfrm4_update_pmtu(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb, u32 mtu)
{
@@ -274,9 +150,6 @@ static const struct xfrm_policy_afinfo xfrm4_policy_afinfo = {
.dst_ops = &xfrm4_dst_ops_template,
.dst_lookup = xfrm4_dst_lookup,
.get_saddr = xfrm4_get_saddr,
- .decode_session = _decode_session4,
- .get_tos = xfrm4_get_tos,
- .init_path = xfrm4_init_path,
.fill_dst = xfrm4_fill_dst,
.blackhole_route = ipv4_blackhole_route,
};
diff --git a/net/ipv4/xfrm4_protocol.c b/net/ipv4/xfrm4_protocol.c
index 35c54865dc42..bcab48944c15 100644
--- a/net/ipv4/xfrm4_protocol.c
+++ b/net/ipv4/xfrm4_protocol.c
@@ -46,7 +46,7 @@ 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 +61,6 @@ 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)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.