Commit | Line | Data |
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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, |
77 | struct sk_buff *skb, | |
d998f8ef TH |
78 | struct net_device *dev, struct in6_addr *saddr, |
79 | struct in6_addr *daddr, | |
13461144 DB |
80 | __u8 prio, __u8 ttl, __be32 label, |
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); |
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 | |
114 | MODULE_LICENSE("GPL"); |