Commit | Line | Data |
---|---|---|
fd384412 AZ |
1 | #include <linux/module.h> |
2 | #include <linux/errno.h> | |
3 | #include <linux/socket.h> | |
4 | #include <linux/udp.h> | |
5 | #include <linux/types.h> | |
6 | #include <linux/kernel.h> | |
7 | #include <linux/in6.h> | |
8 | #include <net/udp.h> | |
9 | #include <net/udp_tunnel.h> | |
10 | #include <net/net_namespace.h> | |
11 | #include <net/netns/generic.h> | |
12 | #include <net/ip6_tunnel.h> | |
13 | #include <net/ip6_checksum.h> | |
14 | ||
15 | int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, | |
16 | struct socket **sockp) | |
17 | { | |
18 | struct sockaddr_in6 udp6_addr; | |
19 | int err; | |
20 | struct socket *sock = NULL; | |
21 | ||
22 | err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock); | |
23 | if (err < 0) | |
24 | goto error; | |
25 | ||
26 | sk_change_net(sock->sk, net); | |
27 | ||
28 | udp6_addr.sin6_family = AF_INET6; | |
29 | memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6, | |
30 | sizeof(udp6_addr.sin6_addr)); | |
31 | udp6_addr.sin6_port = cfg->local_udp_port; | |
32 | err = kernel_bind(sock, (struct sockaddr *)&udp6_addr, | |
33 | sizeof(udp6_addr)); | |
34 | if (err < 0) | |
35 | goto error; | |
36 | ||
37 | if (cfg->peer_udp_port) { | |
38 | udp6_addr.sin6_family = AF_INET6; | |
39 | memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6, | |
40 | sizeof(udp6_addr.sin6_addr)); | |
41 | udp6_addr.sin6_port = cfg->peer_udp_port; | |
42 | err = kernel_connect(sock, | |
43 | (struct sockaddr *)&udp6_addr, | |
44 | sizeof(udp6_addr), 0); | |
45 | } | |
46 | if (err < 0) | |
47 | goto error; | |
48 | ||
49 | udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums); | |
50 | udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums); | |
51 | ||
52 | *sockp = sock; | |
53 | return 0; | |
54 | ||
55 | error: | |
56 | if (sock) { | |
57 | kernel_sock_shutdown(sock, SHUT_RDWR); | |
58 | sk_release_kernel(sock->sk); | |
59 | } | |
60 | *sockp = NULL; | |
61 | return err; | |
62 | } | |
63 | EXPORT_SYMBOL_GPL(udp_sock_create6); | |
6a93cc90 | 64 | |
d998f8ef TH |
65 | int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sk_buff *skb, |
66 | struct net_device *dev, struct in6_addr *saddr, | |
67 | struct in6_addr *daddr, | |
68 | __u8 prio, __u8 ttl, __be16 src_port, | |
69 | __be16 dst_port, bool nocheck) | |
6a93cc90 AZ |
70 | { |
71 | struct udphdr *uh; | |
72 | struct ipv6hdr *ip6h; | |
6a93cc90 AZ |
73 | |
74 | __skb_push(skb, sizeof(*uh)); | |
75 | skb_reset_transport_header(skb); | |
76 | uh = udp_hdr(skb); | |
77 | ||
78 | uh->dest = dst_port; | |
79 | uh->source = src_port; | |
80 | ||
81 | uh->len = htons(skb->len); | |
6a93cc90 AZ |
82 | |
83 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
84 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | |
85 | | IPSKB_REROUTED); | |
86 | skb_dst_set(skb, dst); | |
87 | ||
d998f8ef | 88 | udp6_set_csum(nocheck, skb, saddr, daddr, skb->len); |
6a93cc90 AZ |
89 | |
90 | __skb_push(skb, sizeof(*ip6h)); | |
91 | skb_reset_network_header(skb); | |
92 | ip6h = ipv6_hdr(skb); | |
93 | ip6_flow_hdr(ip6h, prio, htonl(0)); | |
94 | ip6h->payload_len = htons(skb->len); | |
95 | ip6h->nexthdr = IPPROTO_UDP; | |
96 | ip6h->hop_limit = ttl; | |
97 | ip6h->daddr = *daddr; | |
98 | ip6h->saddr = *saddr; | |
99 | ||
100 | ip6tunnel_xmit(skb, dev); | |
101 | return 0; | |
102 | } | |
103 | EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb); | |
3fcb95a8 TH |
104 | |
105 | MODULE_LICENSE("GPL"); |