mirror of
https://github.com/openvswitch/ovs
synced 2025-10-17 14:28:02 +00:00
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>
293 lines
7.0 KiB
C
293 lines
7.0 KiB
C
#include <linux/version.h>
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#ifndef USE_UPSTREAM_TUNNEL
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/socket.h>
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#include <linux/udp.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <net/ip_tunnels.h>
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#include <net/udp.h>
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#include <net/udp_tunnel.h>
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#include <net/net_namespace.h>
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#include <net/ip6_checksum.h>
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#include <net/ip6_tunnel.h>
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#include "gso.h"
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int rpl_udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
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struct socket **sockp)
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{
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int err;
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struct socket *sock = NULL;
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struct sockaddr_in udp_addr;
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err = sock_create_kern(net, AF_INET, SOCK_DGRAM, 0, &sock);
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if (err < 0)
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goto error;
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udp_addr.sin_family = AF_INET;
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udp_addr.sin_addr = cfg->local_ip;
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udp_addr.sin_port = cfg->local_udp_port;
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err = kernel_bind(sock, (struct sockaddr *)&udp_addr,
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sizeof(udp_addr));
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if (err < 0)
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goto error;
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if (cfg->peer_udp_port) {
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udp_addr.sin_family = AF_INET;
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udp_addr.sin_addr = cfg->peer_ip;
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udp_addr.sin_port = cfg->peer_udp_port;
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err = kernel_connect(sock, (struct sockaddr *)&udp_addr,
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sizeof(udp_addr), 0);
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if (err < 0)
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goto error;
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}
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#ifdef HAVE_SK_NO_CHECK_TX
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sock->sk->sk_no_check_tx = !cfg->use_udp_checksums;
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#endif
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*sockp = sock;
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return 0;
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error:
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if (sock) {
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kernel_sock_shutdown(sock, SHUT_RDWR);
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sock_release(sock);
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}
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*sockp = NULL;
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return err;
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}
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EXPORT_SYMBOL(rpl_udp_sock_create4);
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int rpl_udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
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struct socket **sockp)
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{
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struct sockaddr_in6 udp6_addr;
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int err;
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struct socket *sock = NULL;
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err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock);
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if (err < 0)
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goto error;
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if (cfg->ipv6_v6only) {
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int val = 1;
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err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
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(char *) &val, sizeof(val));
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if (err < 0)
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goto error;
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}
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udp6_addr.sin6_family = AF_INET6;
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memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
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sizeof(udp6_addr.sin6_addr));
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udp6_addr.sin6_port = cfg->local_udp_port;
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err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
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sizeof(udp6_addr));
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if (err < 0)
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goto error;
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if (cfg->peer_udp_port) {
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udp6_addr.sin6_family = AF_INET6;
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memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
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sizeof(udp6_addr.sin6_addr));
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udp6_addr.sin6_port = cfg->peer_udp_port;
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err = kernel_connect(sock,
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(struct sockaddr *)&udp6_addr,
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sizeof(udp6_addr), 0);
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}
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if (err < 0)
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goto error;
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udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
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udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
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*sockp = sock;
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return 0;
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error:
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if (sock) {
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kernel_sock_shutdown(sock, SHUT_RDWR);
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sock_release(sock);
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}
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*sockp = NULL;
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return err;
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}
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EXPORT_SYMBOL_GPL(rpl_udp_sock_create6);
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void rpl_setup_udp_tunnel_sock(struct net *net, struct socket *sock,
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struct udp_tunnel_sock_cfg *cfg)
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{
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struct sock *sk = sock->sk;
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/* Disable multicast loopback */
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inet_sk(sk)->mc_loop = 0;
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rcu_assign_sk_user_data(sk, cfg->sk_user_data);
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udp_sk(sk)->encap_type = cfg->encap_type;
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udp_sk(sk)->encap_rcv = cfg->encap_rcv;
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udp_sk(sk)->encap_destroy = cfg->encap_destroy;
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#ifdef HAVE_UDP_TUNNEL_SOCK_CFG_GRO_RECEIVE
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udp_sk(sk)->gro_receive = cfg->gro_receive;
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udp_sk(sk)->gro_complete = cfg->gro_complete;
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#endif
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udp_tunnel_encap_enable(sock);
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}
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EXPORT_SYMBOL_GPL(rpl_setup_udp_tunnel_sock);
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void rpl_udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk,
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struct sk_buff *skb, __be32 src, __be32 dst,
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__u8 tos, __u8 ttl, __be16 df, __be16 src_port,
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__be16 dst_port, bool xnet, bool nocheck)
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{
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struct udphdr *uh;
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__skb_push(skb, sizeof(*uh));
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skb_reset_transport_header(skb);
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uh = udp_hdr(skb);
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uh->dest = dst_port;
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uh->source = src_port;
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uh->len = htons(skb->len);
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udp_set_csum(nocheck, skb, src, dst, skb->len);
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iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet);
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}
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EXPORT_SYMBOL_GPL(rpl_udp_tunnel_xmit_skb);
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void rpl_udp_tunnel_sock_release(struct socket *sock)
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{
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rcu_assign_sk_user_data(sock->sk, NULL);
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kernel_sock_shutdown(sock, SHUT_RDWR);
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sock_release(sock);
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}
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EXPORT_SYMBOL_GPL(rpl_udp_tunnel_sock_release);
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#if IS_ENABLED(CONFIG_IPV6)
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#define udp_v6_check rpl_udp_v6_check
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static __sum16 udp_v6_check(int len,
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const struct in6_addr *saddr,
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const struct in6_addr *daddr,
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__wsum base)
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{
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return csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, base);
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}
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#define udp6_set_csum rpl_udp6_set_csum
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static void udp6_set_csum(bool nocheck, struct sk_buff *skb,
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const struct in6_addr *saddr,
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const struct in6_addr *daddr, int len)
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{
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struct udphdr *uh = udp_hdr(skb);
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if (nocheck)
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uh->check = 0;
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else if (skb_is_gso(skb))
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uh->check = ~udp_v6_check(len, saddr, daddr, 0);
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else if (skb->ip_summed == CHECKSUM_PARTIAL) {
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uh->check = 0;
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uh->check = udp_v6_check(len, saddr, daddr, lco_csum(skb));
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if (uh->check == 0)
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uh->check = CSUM_MANGLED_0;
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} else {
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skb->ip_summed = CHECKSUM_PARTIAL;
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skb->csum_start = skb_transport_header(skb) - skb->head;
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skb->csum_offset = offsetof(struct udphdr, check);
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uh->check = ~udp_v6_check(len, saddr, daddr, 0);
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}
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}
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#define ip6_flow_hdr rpl_ip6_flow_hdr
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static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
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__be32 flowlabel)
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{
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*(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
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}
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int rpl_udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
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struct sk_buff *skb,
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struct net_device *dev, struct in6_addr *saddr,
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struct in6_addr *daddr,
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__u8 prio, __u8 ttl, __be32 label, __be16 src_port,
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__be16 dst_port, bool nocheck)
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{
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struct udphdr *uh;
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struct ipv6hdr *ip6h;
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__skb_push(skb, sizeof(*uh));
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skb_reset_transport_header(skb);
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uh = udp_hdr(skb);
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uh->dest = dst_port;
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uh->source = src_port;
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uh->len = htons(skb->len);
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memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
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IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
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| IPSKB_REROUTED);
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skb_dst_set(skb, dst);
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udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
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__skb_push(skb, sizeof(*ip6h));
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skb_reset_network_header(skb);
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ip6h = ipv6_hdr(skb);
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ip6_flow_hdr(ip6h, prio, label);
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ip6h->payload_len = htons(skb->len);
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ip6h->nexthdr = IPPROTO_UDP;
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ip6h->hop_limit = ttl;
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ip6h->daddr = *daddr;
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ip6h->saddr = *saddr;
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ip6tunnel_xmit(sk, skb, dev);
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return 0;
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}
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#endif
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#ifndef USE_UPSTREAM_TUNNEL_GSO
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void ovs_udp_gso(struct sk_buff *skb)
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{
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int udp_offset = skb_transport_offset(skb);
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struct udphdr *uh;
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uh = udp_hdr(skb);
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uh->len = htons(skb->len - udp_offset);
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}
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EXPORT_SYMBOL_GPL(ovs_udp_gso);
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void ovs_udp_csum_gso(struct sk_buff *skb)
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{
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int udp_offset = skb_transport_offset(skb);
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ovs_udp_gso(skb);
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if (!OVS_GSO_CB(skb)->ipv6) {
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struct iphdr *iph = ip_hdr(skb);
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/* csum segment if tunnel sets skb with csum. The cleanest way
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* to do this just to set it up from scratch. */
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udp_set_csum(false, skb, iph->saddr, iph->daddr,
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skb->len - udp_offset);
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#if IS_ENABLED(CONFIG_IPV6)
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} else {
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struct ipv6hdr *ip6h;
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ip6h = ipv6_hdr(skb);
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udp6_set_csum(false, skb, &ip6h->saddr, &ip6h->daddr,
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skb->len - udp_offset);
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#endif
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}
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}
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EXPORT_SYMBOL_GPL(ovs_udp_csum_gso);
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#endif /* USE_UPSTREAM_TUNNEL_GSO */
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#endif
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