Commit 3ff64259 authored by David S. Miller's avatar David S. Miller

Merge branch 'udp-tunnel-common'

Andy Zhou says:

====================
Refactor vxlan and l2tp to use new common UDP tunnel APIs

This patch series add a few more UDP tunnel APIs and refactoring current
UDP tunnel based protocols, vxlan and l2tp to make use of the new APIs.

The added APIs are setup_udp_tunnel_sock(), udp_tunnel_xmit_skb() and
udp_tunnel_sock_release(). Those implementation logics already exist in
current vxlan and l2tp implementation. Move them to common APIs to reduce
code duplications.

Also split udp_tunnel.c into net/ipv4/udp_tunnel.c and
net/ipv6/ip6_udp_tunnel.c to maintain proper IP protocol separation.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 79ba2b4c c8fffcea
...@@ -42,6 +42,7 @@ ...@@ -42,6 +42,7 @@
#include <net/netns/generic.h> #include <net/netns/generic.h>
#include <net/vxlan.h> #include <net/vxlan.h>
#include <net/protocol.h> #include <net/protocol.h>
#include <net/udp_tunnel.h>
#if IS_ENABLED(CONFIG_IPV6) #if IS_ENABLED(CONFIG_IPV6)
#include <net/ipv6.h> #include <net/ipv6.h>
#include <net/addrconf.h> #include <net/addrconf.h>
...@@ -1062,7 +1063,6 @@ void vxlan_sock_release(struct vxlan_sock *vs) ...@@ -1062,7 +1063,6 @@ void vxlan_sock_release(struct vxlan_sock *vs)
spin_lock(&vn->sock_lock); spin_lock(&vn->sock_lock);
hlist_del_rcu(&vs->hlist); hlist_del_rcu(&vs->hlist);
rcu_assign_sk_user_data(vs->sock->sk, NULL);
vxlan_notify_del_rx_port(vs); vxlan_notify_del_rx_port(vs);
spin_unlock(&vn->sock_lock); spin_unlock(&vn->sock_lock);
...@@ -1336,7 +1336,6 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb) ...@@ -1336,7 +1336,6 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
} }
#if IS_ENABLED(CONFIG_IPV6) #if IS_ENABLED(CONFIG_IPV6)
static struct sk_buff *vxlan_na_create(struct sk_buff *request, static struct sk_buff *vxlan_na_create(struct sk_buff *request,
struct neighbour *n, bool isrouter) struct neighbour *n, bool isrouter)
{ {
...@@ -1570,13 +1569,6 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) ...@@ -1570,13 +1569,6 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
return false; return false;
} }
static inline struct sk_buff *vxlan_handle_offloads(struct sk_buff *skb,
bool udp_csum)
{
int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
return iptunnel_handle_offloads(skb, udp_csum, type);
}
#if IS_ENABLED(CONFIG_IPV6) #if IS_ENABLED(CONFIG_IPV6)
static int vxlan6_xmit_skb(struct vxlan_sock *vs, static int vxlan6_xmit_skb(struct vxlan_sock *vs,
struct dst_entry *dst, struct sk_buff *skb, struct dst_entry *dst, struct sk_buff *skb,
...@@ -1585,13 +1577,12 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs, ...@@ -1585,13 +1577,12 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs,
__be16 src_port, __be16 dst_port, __be32 vni, __be16 src_port, __be16 dst_port, __be32 vni,
bool xnet) bool xnet)
{ {
struct ipv6hdr *ip6h;
struct vxlanhdr *vxh; struct vxlanhdr *vxh;
struct udphdr *uh;
int min_headroom; int min_headroom;
int err; int err;
bool udp_sum = !udp_get_no_check6_tx(vs->sock->sk);
skb = vxlan_handle_offloads(skb, !udp_get_no_check6_tx(vs->sock->sk)); skb = udp_tunnel_handle_offloads(skb, udp_sum);
if (IS_ERR(skb)) if (IS_ERR(skb))
return -EINVAL; return -EINVAL;
...@@ -1619,38 +1610,8 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs, ...@@ -1619,38 +1610,8 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs,
vxh->vx_flags = htonl(VXLAN_FLAGS); vxh->vx_flags = htonl(VXLAN_FLAGS);
vxh->vx_vni = vni; vxh->vx_vni = vni;
__skb_push(skb, sizeof(*uh)); udp_tunnel6_xmit_skb(vs->sock, dst, skb, dev, saddr, daddr, prio,
skb_reset_transport_header(skb); ttl, src_port, dst_port);
uh = udp_hdr(skb);
uh->dest = dst_port;
uh->source = src_port;
uh->len = htons(skb->len);
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
IPSKB_REROUTED);
skb_dst_set(skb, dst);
udp6_set_csum(udp_get_no_check6_tx(vs->sock->sk), skb,
saddr, daddr, skb->len);
__skb_push(skb, sizeof(*ip6h));
skb_reset_network_header(skb);
ip6h = ipv6_hdr(skb);
ip6h->version = 6;
ip6h->priority = prio;
ip6h->flow_lbl[0] = 0;
ip6h->flow_lbl[1] = 0;
ip6h->flow_lbl[2] = 0;
ip6h->payload_len = htons(skb->len);
ip6h->nexthdr = IPPROTO_UDP;
ip6h->hop_limit = ttl;
ip6h->daddr = *daddr;
ip6h->saddr = *saddr;
ip6tunnel_xmit(skb, dev);
return 0; return 0;
} }
#endif #endif
...@@ -1661,11 +1622,11 @@ int vxlan_xmit_skb(struct vxlan_sock *vs, ...@@ -1661,11 +1622,11 @@ int vxlan_xmit_skb(struct vxlan_sock *vs,
__be16 src_port, __be16 dst_port, __be32 vni, bool xnet) __be16 src_port, __be16 dst_port, __be32 vni, bool xnet)
{ {
struct vxlanhdr *vxh; struct vxlanhdr *vxh;
struct udphdr *uh;
int min_headroom; int min_headroom;
int err; int err;
bool udp_sum = !vs->sock->sk->sk_no_check_tx;
skb = vxlan_handle_offloads(skb, !vs->sock->sk->sk_no_check_tx); skb = udp_tunnel_handle_offloads(skb, udp_sum);
if (IS_ERR(skb)) if (IS_ERR(skb))
return -EINVAL; return -EINVAL;
...@@ -1691,20 +1652,8 @@ int vxlan_xmit_skb(struct vxlan_sock *vs, ...@@ -1691,20 +1652,8 @@ int vxlan_xmit_skb(struct vxlan_sock *vs,
vxh->vx_flags = htonl(VXLAN_FLAGS); vxh->vx_flags = htonl(VXLAN_FLAGS);
vxh->vx_vni = vni; vxh->vx_vni = vni;
__skb_push(skb, sizeof(*uh)); return udp_tunnel_xmit_skb(vs->sock, rt, skb, src, dst, tos,
skb_reset_transport_header(skb); ttl, df, src_port, dst_port, xnet);
uh = udp_hdr(skb);
uh->dest = dst_port;
uh->source = src_port;
uh->len = htons(skb->len);
udp_set_csum(vs->sock->sk->sk_no_check_tx, skb,
src, dst, skb->len);
return iptunnel_xmit(vs->sock->sk, rt, skb, src, dst, IPPROTO_UDP,
tos, ttl, df, xnet);
} }
EXPORT_SYMBOL_GPL(vxlan_xmit_skb); EXPORT_SYMBOL_GPL(vxlan_xmit_skb);
...@@ -1829,11 +1778,11 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, ...@@ -1829,11 +1778,11 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
tos = ip_tunnel_ecn_encap(tos, old_iph, skb); tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
err = vxlan_xmit_skb(vxlan->vn_sock, rt, skb, err = udp_tunnel_xmit_skb(vxlan->vn_sock->sock, rt, skb,
fl4.saddr, dst->sin.sin_addr.s_addr, fl4.saddr, dst->sin.sin_addr.s_addr,
tos, ttl, df, src_port, dst_port, tos, ttl, df, src_port, dst_port,
htonl(vni << 8), !net_eq(vxlan->net,
!net_eq(vxlan->net, dev_net(vxlan->dev))); dev_net(vxlan->dev)));
if (err < 0) if (err < 0)
goto rt_tx_error; goto rt_tx_error;
...@@ -2333,8 +2282,7 @@ static const struct ethtool_ops vxlan_ethtool_ops = { ...@@ -2333,8 +2282,7 @@ static const struct ethtool_ops vxlan_ethtool_ops = {
static void vxlan_del_work(struct work_struct *work) static void vxlan_del_work(struct work_struct *work)
{ {
struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work); struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
udp_tunnel_sock_release(vs->sock);
sk_release_kernel(vs->sock->sk);
kfree_rcu(vs, rcu); kfree_rcu(vs, rcu);
} }
...@@ -2367,11 +2315,6 @@ static struct socket *vxlan_create_sock(struct net *net, bool ipv6, ...@@ -2367,11 +2315,6 @@ static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
if (err < 0) if (err < 0)
return ERR_PTR(err); return ERR_PTR(err);
/* Disable multicast loopback */
inet_sk(sock->sk)->mc_loop = 0;
udp_set_convert_csum(sock->sk, true);
return sock; return sock;
} }
...@@ -2383,9 +2326,9 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, ...@@ -2383,9 +2326,9 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
struct vxlan_net *vn = net_generic(net, vxlan_net_id); struct vxlan_net *vn = net_generic(net, vxlan_net_id);
struct vxlan_sock *vs; struct vxlan_sock *vs;
struct socket *sock; struct socket *sock;
struct sock *sk;
unsigned int h; unsigned int h;
bool ipv6 = !!(flags & VXLAN_F_IPV6); bool ipv6 = !!(flags & VXLAN_F_IPV6);
struct udp_tunnel_sock_cfg tunnel_cfg;
vs = kzalloc(sizeof(*vs), GFP_KERNEL); vs = kzalloc(sizeof(*vs), GFP_KERNEL);
if (!vs) if (!vs)
...@@ -2403,11 +2346,9 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, ...@@ -2403,11 +2346,9 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
} }
vs->sock = sock; vs->sock = sock;
sk = sock->sk;
atomic_set(&vs->refcnt, 1); atomic_set(&vs->refcnt, 1);
vs->rcv = rcv; vs->rcv = rcv;
vs->data = data; vs->data = data;
rcu_assign_sk_user_data(vs->sock->sk, vs);
/* Initialize the vxlan udp offloads structure */ /* Initialize the vxlan udp offloads structure */
vs->udp_offloads.port = port; vs->udp_offloads.port = port;
...@@ -2420,14 +2361,12 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port, ...@@ -2420,14 +2361,12 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
spin_unlock(&vn->sock_lock); spin_unlock(&vn->sock_lock);
/* Mark socket as an encapsulation socket. */ /* Mark socket as an encapsulation socket. */
udp_sk(sk)->encap_type = 1; tunnel_cfg.sk_user_data = vs;
udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv; tunnel_cfg.encap_type = 1;
#if IS_ENABLED(CONFIG_IPV6) tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
if (ipv6) tunnel_cfg.encap_destroy = NULL;
ipv6_stub->udpv6_encap_enable();
else setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
#endif
udp_encap_enable();
return vs; return vs;
} }
......
#ifndef __NET_UDP_TUNNEL_H #ifndef __NET_UDP_TUNNEL_H
#define __NET_UDP_TUNNEL_H #define __NET_UDP_TUNNEL_H
#include <net/ip_tunnels.h>
#include <net/udp.h>
#if IS_ENABLED(CONFIG_IPV6)
#include <net/ipv6.h>
#include <net/addrconf.h>
#endif
struct udp_port_cfg { struct udp_port_cfg {
u8 family; u8 family;
...@@ -26,7 +34,80 @@ struct udp_port_cfg { ...@@ -26,7 +34,80 @@ struct udp_port_cfg {
use_udp6_rx_checksums:1; use_udp6_rx_checksums:1;
}; };
int udp_sock_create(struct net *net, struct udp_port_cfg *cfg, int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp);
#if IS_ENABLED(CONFIG_IPV6)
int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp); struct socket **sockp);
#else
static inline int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp)
{
return 0;
}
#endif
static inline int udp_sock_create(struct net *net,
struct udp_port_cfg *cfg,
struct socket **sockp)
{
if (cfg->family == AF_INET)
return udp_sock_create4(net, cfg, sockp);
if (cfg->family == AF_INET6)
return udp_sock_create6(net, cfg, sockp);
return -EPFNOSUPPORT;
}
typedef int (*udp_tunnel_encap_rcv_t)(struct sock *sk, struct sk_buff *skb);
typedef void (*udp_tunnel_encap_destroy_t)(struct sock *sk);
struct udp_tunnel_sock_cfg {
void *sk_user_data; /* user data used by encap_rcv call back */
/* Used for setting up udp_sock fields, see udp.h for details */
__u8 encap_type;
udp_tunnel_encap_rcv_t encap_rcv;
udp_tunnel_encap_destroy_t encap_destroy;
};
/* Setup the given (UDP) sock to receive UDP encapsulated packets */
void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
struct udp_tunnel_sock_cfg *sock_cfg);
/* Transmit the skb using UDP encapsulation. */
int udp_tunnel_xmit_skb(struct socket *sock, struct rtable *rt,
struct sk_buff *skb, __be32 src, __be32 dst,
__u8 tos, __u8 ttl, __be16 df, __be16 src_port,
__be16 dst_port, bool xnet);
#if IS_ENABLED(CONFIG_IPV6)
int udp_tunnel6_xmit_skb(struct socket *sock, struct dst_entry *dst,
struct sk_buff *skb, struct net_device *dev,
struct in6_addr *saddr, struct in6_addr *daddr,
__u8 prio, __u8 ttl, __be16 src_port,
__be16 dst_port);
#endif
void udp_tunnel_sock_release(struct socket *sock);
static inline struct sk_buff *udp_tunnel_handle_offloads(struct sk_buff *skb,
bool udp_csum)
{
int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
return iptunnel_handle_offloads(skb, udp_csum, type);
}
static inline void udp_tunnel_encap_enable(struct socket *sock)
{
#if IS_ENABLED(CONFIG_IPV6)
if (sock->sk->sk_family == PF_INET6)
ipv6_stub->udpv6_encap_enable();
else
#endif
udp_encap_enable();
}
#endif #endif
...@@ -8,48 +8,11 @@ ...@@ -8,48 +8,11 @@
#include <net/udp_tunnel.h> #include <net/udp_tunnel.h>
#include <net/net_namespace.h> #include <net/net_namespace.h>
int udp_sock_create(struct net *net, struct udp_port_cfg *cfg, int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp) struct socket **sockp)
{ {
int err = -EINVAL; int err;
struct socket *sock = NULL; struct socket *sock = NULL;
#if IS_ENABLED(CONFIG_IPV6)
if (cfg->family == AF_INET6) {
struct sockaddr_in6 udp6_addr;
err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock);
if (err < 0)
goto error;
sk_change_net(sock->sk, net);
udp6_addr.sin6_family = AF_INET6;
memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
sizeof(udp6_addr.sin6_addr));
udp6_addr.sin6_port = cfg->local_udp_port;
err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
sizeof(udp6_addr));
if (err < 0)
goto error;
if (cfg->peer_udp_port) {
udp6_addr.sin6_family = AF_INET6;
memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
sizeof(udp6_addr.sin6_addr));
udp6_addr.sin6_port = cfg->peer_udp_port;
err = kernel_connect(sock,
(struct sockaddr *)&udp6_addr,
sizeof(udp6_addr), 0);
}
if (err < 0)
goto error;
udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
} else
#endif
if (cfg->family == AF_INET) {
struct sockaddr_in udp_addr; struct sockaddr_in udp_addr;
err = sock_create_kern(AF_INET, SOCK_DGRAM, 0, &sock); err = sock_create_kern(AF_INET, SOCK_DGRAM, 0, &sock);
...@@ -70,21 +33,15 @@ int udp_sock_create(struct net *net, struct udp_port_cfg *cfg, ...@@ -70,21 +33,15 @@ int udp_sock_create(struct net *net, struct udp_port_cfg *cfg,
udp_addr.sin_family = AF_INET; udp_addr.sin_family = AF_INET;
udp_addr.sin_addr = cfg->peer_ip; udp_addr.sin_addr = cfg->peer_ip;
udp_addr.sin_port = cfg->peer_udp_port; udp_addr.sin_port = cfg->peer_udp_port;
err = kernel_connect(sock, err = kernel_connect(sock, (struct sockaddr *)&udp_addr,
(struct sockaddr *)&udp_addr,
sizeof(udp_addr), 0); sizeof(udp_addr), 0);
if (err < 0) if (err < 0)
goto error; goto error;
} }
sock->sk->sk_no_check_tx = !cfg->use_udp_checksums; sock->sk->sk_no_check_tx = !cfg->use_udp_checksums;
} else {
return -EPFNOSUPPORT;
}
*sockp = sock; *sockp = sock;
return 0; return 0;
error: error:
...@@ -95,6 +52,57 @@ int udp_sock_create(struct net *net, struct udp_port_cfg *cfg, ...@@ -95,6 +52,57 @@ int udp_sock_create(struct net *net, struct udp_port_cfg *cfg,
*sockp = NULL; *sockp = NULL;
return err; return err;
} }
EXPORT_SYMBOL(udp_sock_create); EXPORT_SYMBOL(udp_sock_create4);
void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
struct udp_tunnel_sock_cfg *cfg)
{
struct sock *sk = sock->sk;
/* Disable multicast loopback */
inet_sk(sk)->mc_loop = 0;
/* Enable CHECKSUM_UNNECESSARY to CHECKSUM_COMPLETE conversion */
udp_set_convert_csum(sk, true);
rcu_assign_sk_user_data(sk, cfg->sk_user_data);
udp_sk(sk)->encap_type = cfg->encap_type;
udp_sk(sk)->encap_rcv = cfg->encap_rcv;
udp_sk(sk)->encap_destroy = cfg->encap_destroy;
udp_tunnel_encap_enable(sock);
}
EXPORT_SYMBOL_GPL(setup_udp_tunnel_sock);
int udp_tunnel_xmit_skb(struct socket *sock, struct rtable *rt,
struct sk_buff *skb, __be32 src, __be32 dst,
__u8 tos, __u8 ttl, __be16 df, __be16 src_port,
__be16 dst_port, bool xnet)
{
struct udphdr *uh;
__skb_push(skb, sizeof(*uh));
skb_reset_transport_header(skb);
uh = udp_hdr(skb);
uh->dest = dst_port;
uh->source = src_port;
uh->len = htons(skb->len);
udp_set_csum(sock->sk->sk_no_check_tx, skb, src, dst, skb->len);
return iptunnel_xmit(sock->sk, rt, skb, src, dst, IPPROTO_UDP,
tos, ttl, df, xnet);
}
EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb);
void udp_tunnel_sock_release(struct socket *sock)
{
rcu_assign_sk_user_data(sock->sk, NULL);
kernel_sock_shutdown(sock, SHUT_RDWR);
sk_release_kernel(sock->sk);
}
EXPORT_SYMBOL_GPL(udp_tunnel_sock_release);
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
...@@ -35,6 +35,7 @@ obj-$(CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION) += xfrm6_mode_ro.o ...@@ -35,6 +35,7 @@ obj-$(CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION) += xfrm6_mode_ro.o
obj-$(CONFIG_INET6_XFRM_MODE_BEET) += xfrm6_mode_beet.o obj-$(CONFIG_INET6_XFRM_MODE_BEET) += xfrm6_mode_beet.o
obj-$(CONFIG_IPV6_MIP6) += mip6.o obj-$(CONFIG_IPV6_MIP6) += mip6.o
obj-$(CONFIG_NETFILTER) += netfilter/ obj-$(CONFIG_NETFILTER) += netfilter/
obj-$(CONFIG_NET_UDP_TUNNEL) += ip6_udp_tunnel.o
obj-$(CONFIG_IPV6_VTI) += ip6_vti.o obj-$(CONFIG_IPV6_VTI) += ip6_vti.o
obj-$(CONFIG_IPV6_SIT) += sit.o obj-$(CONFIG_IPV6_SIT) += sit.o
......
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/socket.h>
#include <linux/udp.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/in6.h>
#include <net/udp.h>
#include <net/udp_tunnel.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/ip6_tunnel.h>
#include <net/ip6_checksum.h>
int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp)
{
struct sockaddr_in6 udp6_addr;
int err;
struct socket *sock = NULL;
err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock);
if (err < 0)
goto error;
sk_change_net(sock->sk, net);
udp6_addr.sin6_family = AF_INET6;
memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
sizeof(udp6_addr.sin6_addr));
udp6_addr.sin6_port = cfg->local_udp_port;
err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
sizeof(udp6_addr));
if (err < 0)
goto error;
if (cfg->peer_udp_port) {
udp6_addr.sin6_family = AF_INET6;
memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
sizeof(udp6_addr.sin6_addr));
udp6_addr.sin6_port = cfg->peer_udp_port;
err = kernel_connect(sock,
(struct sockaddr *)&udp6_addr,
sizeof(udp6_addr), 0);
}
if (err < 0)
goto error;
udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
*sockp = sock;
return 0;
error:
if (sock) {
kernel_sock_shutdown(sock, SHUT_RDWR);
sk_release_kernel(sock->sk);
}
*sockp = NULL;
return err;
}
EXPORT_SYMBOL_GPL(udp_sock_create6);
int udp_tunnel6_xmit_skb(struct socket *sock, struct dst_entry *dst,
struct sk_buff *skb, struct net_device *dev,
struct in6_addr *saddr, struct in6_addr *daddr,
__u8 prio, __u8 ttl, __be16 src_port, __be16 dst_port)
{
struct udphdr *uh;
struct ipv6hdr *ip6h;
struct sock *sk = sock->sk;
__skb_push(skb, sizeof(*uh));
skb_reset_transport_header(skb);
uh = udp_hdr(skb);
uh->dest = dst_port;
uh->source = src_port;
uh->len = htons(skb->len);
uh->check = 0;
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
| IPSKB_REROUTED);
skb_dst_set(skb, dst);
udp6_set_csum(udp_get_no_check6_tx(sk), skb, &inet6_sk(sk)->saddr,
&sk->sk_v6_daddr, skb->len);
__skb_push(skb, sizeof(*ip6h));
skb_reset_network_header(skb);
ip6h = ipv6_hdr(skb);
ip6_flow_hdr(ip6h, prio, htonl(0));
ip6h->payload_len = htons(skb->len);
ip6h->nexthdr = IPPROTO_UDP;
ip6h->hop_limit = ttl;
ip6h->daddr = *daddr;
ip6h->saddr = *saddr;
ip6tunnel_xmit(skb, dev);
return 0;
}
EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
...@@ -1392,8 +1392,6 @@ static int l2tp_tunnel_sock_create(struct net *net, ...@@ -1392,8 +1392,6 @@ static int l2tp_tunnel_sock_create(struct net *net,
if (err < 0) if (err < 0)
goto out; goto out;
udp_set_convert_csum(sock->sk, true);
break; break;
case L2TP_ENCAPTYPE_IP: case L2TP_ENCAPTYPE_IP:
...@@ -1584,19 +1582,17 @@ int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id, u32 ...@@ -1584,19 +1582,17 @@ int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id, u32
/* Mark socket as an encapsulation socket. See net/ipv4/udp.c */ /* Mark socket as an encapsulation socket. See net/ipv4/udp.c */
tunnel->encap = encap; tunnel->encap = encap;
if (encap == L2TP_ENCAPTYPE_UDP) { if (encap == L2TP_ENCAPTYPE_UDP) {
/* Mark socket as an encapsulation socket. See net/ipv4/udp.c */ struct udp_tunnel_sock_cfg udp_cfg;
udp_sk(sk)->encap_type = UDP_ENCAP_L2TPINUDP;
udp_sk(sk)->encap_rcv = l2tp_udp_encap_recv; udp_cfg.sk_user_data = tunnel;
udp_sk(sk)->encap_destroy = l2tp_udp_encap_destroy; udp_cfg.encap_type = UDP_ENCAP_L2TPINUDP;
#if IS_ENABLED(CONFIG_IPV6) udp_cfg.encap_rcv = l2tp_udp_encap_recv;
if (sk->sk_family == PF_INET6 && !tunnel->v4mapped) udp_cfg.encap_destroy = l2tp_udp_encap_destroy;
udpv6_encap_enable();
else
#endif
udp_encap_enable();
}
setup_udp_tunnel_sock(net, sock, &udp_cfg);
} else {
sk->sk_user_data = tunnel; sk->sk_user_data = tunnel;
}
/* Hook on the tunnel socket destructor so that we can cleanup /* Hook on the tunnel socket destructor so that we can cleanup
* if the tunnel socket goes away. * if the tunnel socket goes away.
......
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