[people/ms/linux.git] / net / ipv6 / ip6_udp_tunnel.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");
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
fd384412 AZ	2	#include <linux/module.h>
	3	#include <linux/errno.h>
	4	#include <linux/socket.h>
	5	#include <linux/udp.h>
	6	#include <linux/types.h>
	7	#include <linux/kernel.h>
	8	#include <linux/in6.h>
	9	#include <net/udp.h>
	10	#include <net/udp_tunnel.h>
	11	#include <net/net_namespace.h>
	12	#include <net/netns/generic.h>
	13	#include <net/ip6_tunnel.h>
	14	#include <net/ip6_checksum.h>
	15
	16	int udp_sock_create6(struct net net, struct udp_port_cfg cfg,
	17	struct socket **sockp)
	18	{
fb242745	19	struct sockaddr_in6 udp6_addr = {};
fd384412 AZ	20	int err;
	21	struct socket *sock = NULL;
	22
26abe143	23	err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock);
fd384412 AZ	24	if (err < 0)
	25	goto error;
	26
a43a9ef6	27	if (cfg->ipv6_v6only) {
9b115749	28	err = ip6_sock_set_v6only(sock->sk);
a43a9ef6 JB	29	if (err < 0)
	30	goto error;
	31	}
da5095d0	32	if (cfg->bind_ifindex) {
8ea204c2	33	err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true);
da5095d0 AB	34	if (err < 0)
	35	goto error;
	36	}
a43a9ef6	37
fd384412 AZ	38	udp6_addr.sin6_family = AF_INET6;
	39	memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
	40	sizeof(udp6_addr.sin6_addr));
	41	udp6_addr.sin6_port = cfg->local_udp_port;
	42	err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
	43	sizeof(udp6_addr));
	44	if (err < 0)
	45	goto error;
	46
	47	if (cfg->peer_udp_port) {
fb242745	48	memset(&udp6_addr, 0, sizeof(udp6_addr));
fd384412 AZ	49	udp6_addr.sin6_family = AF_INET6;
	50	memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
	51	sizeof(udp6_addr.sin6_addr));
	52	udp6_addr.sin6_port = cfg->peer_udp_port;
	53	err = kernel_connect(sock,
	54	(struct sockaddr *)&udp6_addr,
	55	sizeof(udp6_addr), 0);
	56	}
	57	if (err < 0)
	58	goto error;
	59
	60	udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
	61	udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
	62
	63	*sockp = sock;
	64	return 0;
	65
	66	error:
	67	if (sock) {
	68	kernel_sock_shutdown(sock, SHUT_RDWR);
26abe143	69	sock_release(sock);
fd384412 AZ	70	}
	71	*sockp = NULL;
	72	return err;
	73	}
	74	EXPORT_SYMBOL_GPL(udp_sock_create6);
6a93cc90	75
79b16aad DM	76	int udp_tunnel6_xmit_skb(struct dst_entry dst, struct sock sk,
79b16aad DM	77	struct sk_buff *skb,
d998f8ef TH	78	struct net_device dev, struct in6_addr saddr,
d998f8ef TH	79	struct in6_addr *daddr,
13461144 DB	80	__u8 prio, __u8 ttl, __be32 label,
13461144 DB	81	__be16 src_port, __be16 dst_port, bool nocheck)
6a93cc90 AZ	82	{
	83	struct udphdr *uh;
	84	struct ipv6hdr *ip6h;
6a93cc90 AZ	85
	86	__skb_push(skb, sizeof(*uh));
	87	skb_reset_transport_header(skb);
	88	uh = udp_hdr(skb);
	89
	90	uh->dest = dst_port;
	91	uh->source = src_port;
	92
	93	uh->len = htons(skb->len);
6a93cc90	94
6a93cc90 AZ	95	skb_dst_set(skb, dst);
6a93cc90 AZ	96
d998f8ef	97	udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
6a93cc90 AZ	98
	99	__skb_push(skb, sizeof(*ip6h));
	100	skb_reset_network_header(skb);
	101	ip6h = ipv6_hdr(skb);
13461144	102	ip6_flow_hdr(ip6h, prio, label);
6a93cc90 AZ	103	ip6h->payload_len = htons(skb->len);
	104	ip6h->nexthdr = IPPROTO_UDP;
	105	ip6h->hop_limit = ttl;
	106	ip6h->daddr = *daddr;
	107	ip6h->saddr = *saddr;
	108
79b16aad	109	ip6tunnel_xmit(sk, skb, dev);
6a93cc90 AZ	110	return 0;
	111	}
	112	EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
3fcb95a8 TH	113
3fcb95a8 TH	114	MODULE_LICENSE("GPL");