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openvswitch/datapath/linux/compat/udp_tunnel.c
Greg Rose d97d7f77a9 compat: Remove unsupported kernel compat code
Anything less than 3.10 isn't supported since a couple of releases ago
so remove the dead code.

Signed-off-by: Greg Rose <gvrose8192@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: William Tu <u9012063@gmail.com>
2018-05-21 20:17:04 -07:00

293 lines
7.0 KiB
C

#include <linux/version.h>
#ifndef USE_UPSTREAM_TUNNEL
#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 <net/ip_tunnels.h>
#include <net/udp.h>
#include <net/udp_tunnel.h>
#include <net/net_namespace.h>
#include <net/ip6_checksum.h>
#include <net/ip6_tunnel.h>
#include "gso.h"
int rpl_udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp)
{
int err;
struct socket *sock = NULL;
struct sockaddr_in udp_addr;
err = sock_create_kern(net, AF_INET, SOCK_DGRAM, 0, &sock);
if (err < 0)
goto error;
udp_addr.sin_family = AF_INET;
udp_addr.sin_addr = cfg->local_ip;
udp_addr.sin_port = cfg->local_udp_port;
err = kernel_bind(sock, (struct sockaddr *)&udp_addr,
sizeof(udp_addr));
if (err < 0)
goto error;
if (cfg->peer_udp_port) {
udp_addr.sin_family = AF_INET;
udp_addr.sin_addr = cfg->peer_ip;
udp_addr.sin_port = cfg->peer_udp_port;
err = kernel_connect(sock, (struct sockaddr *)&udp_addr,
sizeof(udp_addr), 0);
if (err < 0)
goto error;
}
#ifdef HAVE_SK_NO_CHECK_TX
sock->sk->sk_no_check_tx = !cfg->use_udp_checksums;
#endif
*sockp = sock;
return 0;
error:
if (sock) {
kernel_sock_shutdown(sock, SHUT_RDWR);
sock_release(sock);
}
*sockp = NULL;
return err;
}
EXPORT_SYMBOL(rpl_udp_sock_create4);
int rpl_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(net, AF_INET6, SOCK_DGRAM, 0, &sock);
if (err < 0)
goto error;
if (cfg->ipv6_v6only) {
int val = 1;
err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
(char *) &val, sizeof(val));
if (err < 0)
goto error;
}
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);
sock_release(sock);
}
*sockp = NULL;
return err;
}
EXPORT_SYMBOL_GPL(rpl_udp_sock_create6);
void rpl_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;
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;
#ifdef HAVE_UDP_TUNNEL_SOCK_CFG_GRO_RECEIVE
udp_sk(sk)->gro_receive = cfg->gro_receive;
udp_sk(sk)->gro_complete = cfg->gro_complete;
#endif
udp_tunnel_encap_enable(sock);
}
EXPORT_SYMBOL_GPL(rpl_setup_udp_tunnel_sock);
void rpl_udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk,
struct sk_buff *skb, __be32 src, __be32 dst,
__u8 tos, __u8 ttl, __be16 df, __be16 src_port,
__be16 dst_port, bool xnet, bool nocheck)
{
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(nocheck, skb, src, dst, skb->len);
iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet);
}
EXPORT_SYMBOL_GPL(rpl_udp_tunnel_xmit_skb);
void rpl_udp_tunnel_sock_release(struct socket *sock)
{
rcu_assign_sk_user_data(sock->sk, NULL);
kernel_sock_shutdown(sock, SHUT_RDWR);
sock_release(sock);
}
EXPORT_SYMBOL_GPL(rpl_udp_tunnel_sock_release);
#if IS_ENABLED(CONFIG_IPV6)
#define udp_v6_check rpl_udp_v6_check
static __sum16 udp_v6_check(int len,
const struct in6_addr *saddr,
const struct in6_addr *daddr,
__wsum base)
{
return csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, base);
}
#define udp6_set_csum rpl_udp6_set_csum
static void udp6_set_csum(bool nocheck, struct sk_buff *skb,
const struct in6_addr *saddr,
const struct in6_addr *daddr, int len)
{
struct udphdr *uh = udp_hdr(skb);
if (nocheck)
uh->check = 0;
else if (skb_is_gso(skb))
uh->check = ~udp_v6_check(len, saddr, daddr, 0);
else if (skb->ip_summed == CHECKSUM_PARTIAL) {
uh->check = 0;
uh->check = udp_v6_check(len, saddr, daddr, lco_csum(skb));
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
} else {
skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum_start = skb_transport_header(skb) - skb->head;
skb->csum_offset = offsetof(struct udphdr, check);
uh->check = ~udp_v6_check(len, saddr, daddr, 0);
}
}
#define ip6_flow_hdr rpl_ip6_flow_hdr
static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
__be32 flowlabel)
{
*(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
}
int rpl_udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
struct sk_buff *skb,
struct net_device *dev, struct in6_addr *saddr,
struct in6_addr *daddr,
__u8 prio, __u8 ttl, __be32 label, __be16 src_port,
__be16 dst_port, bool nocheck)
{
struct udphdr *uh;
struct ipv6hdr *ip6h;
__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);
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(nocheck, skb, saddr, daddr, skb->len);
__skb_push(skb, sizeof(*ip6h));
skb_reset_network_header(skb);
ip6h = ipv6_hdr(skb);
ip6_flow_hdr(ip6h, prio, label);
ip6h->payload_len = htons(skb->len);
ip6h->nexthdr = IPPROTO_UDP;
ip6h->hop_limit = ttl;
ip6h->daddr = *daddr;
ip6h->saddr = *saddr;
ip6tunnel_xmit(sk, skb, dev);
return 0;
}
#endif
#ifndef USE_UPSTREAM_TUNNEL_GSO
void ovs_udp_gso(struct sk_buff *skb)
{
int udp_offset = skb_transport_offset(skb);
struct udphdr *uh;
uh = udp_hdr(skb);
uh->len = htons(skb->len - udp_offset);
}
EXPORT_SYMBOL_GPL(ovs_udp_gso);
void ovs_udp_csum_gso(struct sk_buff *skb)
{
int udp_offset = skb_transport_offset(skb);
ovs_udp_gso(skb);
if (!OVS_GSO_CB(skb)->ipv6) {
struct iphdr *iph = ip_hdr(skb);
/* csum segment if tunnel sets skb with csum. The cleanest way
* to do this just to set it up from scratch. */
udp_set_csum(false, skb, iph->saddr, iph->daddr,
skb->len - udp_offset);
#if IS_ENABLED(CONFIG_IPV6)
} else {
struct ipv6hdr *ip6h;
ip6h = ipv6_hdr(skb);
udp6_set_csum(false, skb, &ip6h->saddr, &ip6h->daddr,
skb->len - udp_offset);
#endif
}
}
EXPORT_SYMBOL_GPL(ovs_udp_csum_gso);
#endif /* USE_UPSTREAM_TUNNEL_GSO */
#endif