projects / mirror_ubuntu-zesty-kernel.git / blame
| 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 AZ |
64 | |
| 65 | int udp_tunnel6_xmit_skb(struct socket *sock, struct dst_entry *dst, | |
| 66 | struct sk_buff *skb, struct net_device *dev, | |
| 67 | struct in6_addr *saddr, struct in6_addr *daddr, | |
| 68 | __u8 prio, __u8 ttl, __be16 src_port, __be16 dst_port) | |
| 69 | { | |
| 70 | struct udphdr *uh; | |
| 71 | struct ipv6hdr *ip6h; | |
| 72 | struct sock *sk = sock->sk; | |
| 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); | |
| 82 | uh->check = 0; | |
| 83 | ||
| 84 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
| 85 | IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | |
| 86 | | IPSKB_REROUTED); | |
| 87 | skb_dst_set(skb, dst); | |
| 88 | ||
| 89 | udp6_set_csum(udp_get_no_check6_tx(sk), skb, &inet6_sk(sk)->saddr, | |
| 90 | &sk->sk_v6_daddr, skb->len); | |
| 91 | ||
| 92 | __skb_push(skb, sizeof(*ip6h)); | |
| 93 | skb_reset_network_header(skb); | |
| 94 | ip6h = ipv6_hdr(skb); | |
| 95 | ip6_flow_hdr(ip6h, prio, htonl(0)); | |
| 96 | ip6h->payload_len = htons(skb->len); | |
| 97 | ip6h->nexthdr = IPPROTO_UDP; | |
| 98 | ip6h->hop_limit = ttl; | |
| 99 | ip6h->daddr = *daddr; | |
| 100 | ip6h->saddr = *saddr; | |
| 101 | ||
| 102 | ip6tunnel_xmit(skb, dev); | |
| 103 | return 0; | |
| 104 | } | |
| 105 | EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb); |