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| author |   Andy Zhou <azhou@nicira.com> | 2014-09-16 17:31:17 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-09-19 15:57:15 -0400 |
| commit | 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d (patch) | |
| tree | 4855feb2fa46451d755bf841a3e463ba2a8053a0 /net/ipv6/ip6_udp_tunnel.c | |
| parent | udp_tunnel: Seperate ipv6 functions into its own file. (diff) | |
| download | linux-dev-6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d.tar.xz linux-dev-6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d.zip | |
udp-tunnel: Add a few more UDP tunnel APIs
Added a few more UDP tunnel APIs that can be shared by UDP based
tunnel protocol implementation. The main ones are highlighted below.
setup_udp_tunnel_sock() configures UDP listener socket for
receiving UDP encapsulated packets.
udp_tunnel_xmit_skb() and upd_tunnel6_xmit_skb() transmit skb
using UDP encapsulation.
udp_tunnel_sock_release() closes the UDP tunnel listener socket.
Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_udp_tunnel.c')
| -rw-r--r-- | net/ipv6/ip6_udp_tunnel.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c index bcfbb4b496fc..cbc990712cc1 100644 --- a/net/ipv6/ip6_udp_tunnel.c +++ b/net/ipv6/ip6_udp_tunnel.c @@ -61,3 +61,45 @@ error: 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); |