115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/socket.h>
|
||
|
|
#include <linux/udp.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/in6.h>
|
||
|
|
#include <net/udp.h>
|
||
|
|
#include <net/udp_tunnel.h>
|
||
|
|
#include <net/net_namespace.h>
|
||
|
|
#include <net/netns/generic.h>
|
||
|
|
#include <net/ip6_tunnel.h>
|
||
|
|
#include <net/ip6_checksum.h>
|
||
|
|
|
||
|
|
int 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;
|
||
|
|
|
||
|
|
err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock);
|
||
|
|
if (err < 0)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
if (cfg->ipv6_v6only) {
|
||
|
|
err = ip6_sock_set_v6only(sock->sk);
|
||
|
|
if (err < 0)
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
if (cfg->bind_ifindex) {
|
||
|
|
err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true);
|
||
|
|
if (err < 0)
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
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) {
|
||
|
|
memset(&udp6_addr, 0, sizeof(udp6_addr));
|
||
|
|
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);
|
||
|
|
sock_release(sock);
|
||
|
|
}
|
||
|
|
*sockp = NULL;
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(udp_sock_create6);
|
||
|
|
|
||
|
|
int 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;
|
||
|
|
|
||
|
|
uh->len = htons(skb->len);
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|