1 #include <linux/version.h>
3 #ifndef USE_UPSTREAM_TUNNEL
5 #include <linux/module.h>
6 #include <linux/errno.h>
7 #include <linux/socket.h>
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <net/ip_tunnels.h>
13 #include <net/udp_tunnel.h>
14 #include <net/net_namespace.h>
15 #include <net/ip6_checksum.h>
16 #include <net/ip6_tunnel.h>
19 int rpl_udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
20 struct socket **sockp)
23 struct socket *sock = NULL;
24 struct sockaddr_in udp_addr;
26 err = sock_create_kern(net, AF_INET, SOCK_DGRAM, 0, &sock);
30 udp_addr.sin_family = AF_INET;
31 udp_addr.sin_addr = cfg->local_ip;
32 udp_addr.sin_port = cfg->local_udp_port;
33 err = kernel_bind(sock, (struct sockaddr *)&udp_addr,
38 if (cfg->peer_udp_port) {
39 udp_addr.sin_family = AF_INET;
40 udp_addr.sin_addr = cfg->peer_ip;
41 udp_addr.sin_port = cfg->peer_udp_port;
42 err = kernel_connect(sock, (struct sockaddr *)&udp_addr,
47 #ifdef HAVE_SK_NO_CHECK_TX
48 sock->sk->sk_no_check_tx = !cfg->use_udp_checksums;
55 kernel_sock_shutdown(sock, SHUT_RDWR);
61 EXPORT_SYMBOL(rpl_udp_sock_create4);
63 int rpl_udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
64 struct socket **sockp)
66 struct sockaddr_in6 udp6_addr;
68 struct socket *sock = NULL;
70 err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock);
74 if (cfg->ipv6_v6only) {
77 err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
78 (char *) &val, sizeof(val));
83 udp6_addr.sin6_family = AF_INET6;
84 memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
85 sizeof(udp6_addr.sin6_addr));
86 udp6_addr.sin6_port = cfg->local_udp_port;
87 err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
92 if (cfg->peer_udp_port) {
93 udp6_addr.sin6_family = AF_INET6;
94 memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
95 sizeof(udp6_addr.sin6_addr));
96 udp6_addr.sin6_port = cfg->peer_udp_port;
97 err = kernel_connect(sock,
98 (struct sockaddr *)&udp6_addr,
99 sizeof(udp6_addr), 0);
104 udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
105 udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
112 kernel_sock_shutdown(sock, SHUT_RDWR);
118 EXPORT_SYMBOL_GPL(rpl_udp_sock_create6);
120 void rpl_setup_udp_tunnel_sock(struct net *net, struct socket *sock,
121 struct udp_tunnel_sock_cfg *cfg)
123 struct sock *sk = sock->sk;
125 /* Disable multicast loopback */
126 inet_sk(sk)->mc_loop = 0;
128 rcu_assign_sk_user_data(sk, cfg->sk_user_data);
130 udp_sk(sk)->encap_type = cfg->encap_type;
131 udp_sk(sk)->encap_rcv = cfg->encap_rcv;
132 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0)
133 udp_sk(sk)->encap_destroy = cfg->encap_destroy;
135 #ifdef HAVE_UDP_TUNNEL_SOCK_CFG_GRO_RECEIVE
136 udp_sk(sk)->gro_receive = cfg->gro_receive;
137 udp_sk(sk)->gro_complete = cfg->gro_complete;
140 udp_tunnel_encap_enable(sock);
142 EXPORT_SYMBOL_GPL(rpl_setup_udp_tunnel_sock);
144 void rpl_udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk,
145 struct sk_buff *skb, __be32 src, __be32 dst,
146 __u8 tos, __u8 ttl, __be16 df, __be16 src_port,
147 __be16 dst_port, bool xnet, bool nocheck)
151 __skb_push(skb, sizeof(*uh));
152 skb_reset_transport_header(skb);
156 uh->source = src_port;
157 uh->len = htons(skb->len);
159 udp_set_csum(nocheck, skb, src, dst, skb->len);
161 iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet);
163 EXPORT_SYMBOL_GPL(rpl_udp_tunnel_xmit_skb);
165 void rpl_udp_tunnel_sock_release(struct socket *sock)
167 rcu_assign_sk_user_data(sock->sk, NULL);
168 kernel_sock_shutdown(sock, SHUT_RDWR);
171 EXPORT_SYMBOL_GPL(rpl_udp_tunnel_sock_release);
173 #if IS_ENABLED(CONFIG_IPV6)
175 #define udp_v6_check rpl_udp_v6_check
176 static __sum16 udp_v6_check(int len,
177 const struct in6_addr *saddr,
178 const struct in6_addr *daddr,
181 return csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, base);
184 #define udp6_set_csum rpl_udp6_set_csum
185 static void udp6_set_csum(bool nocheck, struct sk_buff *skb,
186 const struct in6_addr *saddr,
187 const struct in6_addr *daddr, int len)
189 struct udphdr *uh = udp_hdr(skb);
193 else if (skb_is_gso(skb))
194 uh->check = ~udp_v6_check(len, saddr, daddr, 0);
195 else if (skb_dst(skb) && skb_dst(skb)->dev &&
196 (skb_dst(skb)->dev->features & NETIF_F_IPV6_CSUM)) {
198 BUG_ON(skb->ip_summed == CHECKSUM_PARTIAL);
200 skb->ip_summed = CHECKSUM_PARTIAL;
201 skb->csum_start = skb_transport_header(skb) - skb->head;
202 skb->csum_offset = offsetof(struct udphdr, check);
203 uh->check = ~udp_v6_check(len, saddr, daddr, 0);
207 BUG_ON(skb->ip_summed == CHECKSUM_PARTIAL);
210 csum = skb_checksum(skb, 0, len, 0);
211 uh->check = udp_v6_check(len, saddr, daddr, csum);
213 uh->check = CSUM_MANGLED_0;
215 skb->ip_summed = CHECKSUM_UNNECESSARY;
219 #define ip6_flow_hdr rpl_ip6_flow_hdr
220 static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
223 *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
226 int rpl_udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
228 struct net_device *dev, struct in6_addr *saddr,
229 struct in6_addr *daddr,
230 __u8 prio, __u8 ttl, __be32 label, __be16 src_port,
231 __be16 dst_port, bool nocheck)
234 struct ipv6hdr *ip6h;
236 __skb_push(skb, sizeof(*uh));
237 skb_reset_transport_header(skb);
241 uh->source = src_port;
243 uh->len = htons(skb->len);
245 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
246 IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
248 skb_dst_set(skb, dst);
250 udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
252 __skb_push(skb, sizeof(*ip6h));
253 skb_reset_network_header(skb);
254 ip6h = ipv6_hdr(skb);
255 ip6_flow_hdr(ip6h, prio, label);
256 ip6h->payload_len = htons(skb->len);
257 ip6h->nexthdr = IPPROTO_UDP;
258 ip6h->hop_limit = ttl;
259 ip6h->daddr = *daddr;
260 ip6h->saddr = *saddr;
262 ip6tunnel_xmit(sk, skb, dev);
267 void ovs_udp_gso(struct sk_buff *skb)
269 int udp_offset = skb_transport_offset(skb);
273 uh->len = htons(skb->len - udp_offset);
275 EXPORT_SYMBOL_GPL(ovs_udp_gso);
277 void ovs_udp_csum_gso(struct sk_buff *skb)
279 int udp_offset = skb_transport_offset(skb);
283 if (!OVS_GSO_CB(skb)->ipv6) {
284 struct iphdr *iph = ip_hdr(skb);
286 /* csum segment if tunnel sets skb with csum. The cleanest way
287 * to do this just to set it up from scratch. */
288 udp_set_csum(false, skb, iph->saddr, iph->daddr,
289 skb->len - udp_offset);
290 #if IS_ENABLED(CONFIG_IPV6)
292 struct ipv6hdr *ip6h;
294 ip6h = ipv6_hdr(skb);
295 udp6_set_csum(false, skb, &ip6h->saddr, &ip6h->daddr,
296 skb->len - udp_offset);
300 EXPORT_SYMBOL_GPL(ovs_udp_csum_gso);