#include <linux/version.h>
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,17,0)
+#ifndef USE_UPSTREAM_TUNNEL
#include <linux/module.h>
#include <linux/errno.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>
-int udp_sock_create(struct net *net, struct udp_port_cfg *cfg,
- struct socket **sockp)
+#include "gso.h"
+
+int rpl_udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
+ struct socket **sockp)
{
- int err = -EINVAL;
+ int err;
struct socket *sock = NULL;
+ struct sockaddr_in udp_addr;
-#if IS_ENABLED(CONFIG_IPV6)
- if (cfg->family == AF_INET6) {
- struct sockaddr_in6 udp6_addr;
+ err = sock_create_kern(net, AF_INET, SOCK_DGRAM, 0, &sock);
+ if (err < 0)
+ goto error;
- err = sock_create_kern(AF_INET6, 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;
- 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 (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;
- } else
+ }
+#ifdef HAVE_SK_NO_CHECK_TX
+ sock->sk->sk_no_check_tx = !cfg->use_udp_checksums;
#endif
- if (cfg->family == AF_INET) {
- struct sockaddr_in udp_addr;
+ *sockp = sock;
+ return 0;
- err = sock_create_kern(AF_INET, SOCK_DGRAM, 0, &sock);
- if (err < 0)
- goto error;
+error:
+ if (sock) {
+ kernel_sock_shutdown(sock, SHUT_RDWR);
+ sock_release(sock);
+ }
+ *sockp = NULL;
+ return err;
+}
+EXPORT_SYMBOL(rpl_udp_sock_create4);
- sk_change_net(sock->sk, net);
+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;
- 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));
+ 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;
+ }
- 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;
- }
- } else {
- return -EPFNOSUPPORT;
+ 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);
+ 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;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0)
+ udp_sk(sk)->encap_destroy = cfg->encap_destroy;
+#endif
+#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_dst(skb) && skb_dst(skb)->dev &&
+ (skb_dst(skb)->dev->features & NETIF_F_IPV6_CSUM)) {
+
+ BUG_ON(skb->ip_summed == CHECKSUM_PARTIAL);
+
+ 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);
+ } else {
+ __wsum csum;
+
+ BUG_ON(skb->ip_summed == CHECKSUM_PARTIAL);
+
+ uh->check = 0;
+ csum = skb_checksum(skb, 0, len, 0);
+ uh->check = udp_v6_check(len, saddr, daddr, csum);
+ if (uh->check == 0)
+ uh->check = CSUM_MANGLED_0;
+
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ }
+}
+
+#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;
-#endif /* Linux version < 3.17 */
+ 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
+
+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
projects / cascardo / ovs.git / blobdiff