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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 JB |
27 | if (cfg->ipv6_v6only) { |
28 | int val = 1; | |
29 | ||
30 | err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, | |
31 | (char *) &val, sizeof(val)); | |
32 | if (err < 0) | |
33 | goto error; | |
34 | } | |
da5095d0 | 35 | if (cfg->bind_ifindex) { |
49b4994c DH |
36 | err = kernel_setsockopt(sock, SOL_SOCKET, SO_BINDTOIFINDEX, |
37 | (void *)&cfg->bind_ifindex, | |
38 | sizeof(cfg->bind_ifindex)); | |
da5095d0 AB |
39 | if (err < 0) |
40 | goto error; | |
41 | } | |
a43a9ef6 | 42 | |
fd384412 AZ |
43 | udp6_addr.sin6_family = AF_INET6; |
44 | memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6, | |
45 | sizeof(udp6_addr.sin6_addr)); | |
46 | udp6_addr.sin6_port = cfg->local_udp_port; | |
47 | err = kernel_bind(sock, (struct sockaddr *)&udp6_addr, | |
48 | sizeof(udp6_addr)); | |
49 | if (err < 0) | |
50 | goto error; | |
51 | ||
52 | if (cfg->peer_udp_port) { | |
fb242745 | 53 | memset(&udp6_addr, 0, sizeof(udp6_addr)); |
fd384412 AZ |
54 | udp6_addr.sin6_family = AF_INET6; |
55 | memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6, | |
56 | sizeof(udp6_addr.sin6_addr)); | |
57 | udp6_addr.sin6_port = cfg->peer_udp_port; | |
58 | err = kernel_connect(sock, | |
59 | (struct sockaddr *)&udp6_addr, | |
60 | sizeof(udp6_addr), 0); | |
61 | } | |
62 | if (err < 0) | |
63 | goto error; | |
64 | ||
65 | udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums); | |
66 | udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums); | |
67 | ||
68 | *sockp = sock; | |
69 | return 0; | |
70 | ||
71 | error: | |
72 | if (sock) { | |
73 | kernel_sock_shutdown(sock, SHUT_RDWR); | |
26abe143 | 74 | sock_release(sock); |
fd384412 AZ |
75 | } |
76 | *sockp = NULL; | |
77 | return err; | |
78 | } | |
79 | EXPORT_SYMBOL_GPL(udp_sock_create6); | |
6a93cc90 | 80 | |
79b16aad DM |
81 | int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, |
82 | struct sk_buff *skb, | |
d998f8ef TH |
83 | struct net_device *dev, struct in6_addr *saddr, |
84 | struct in6_addr *daddr, | |
13461144 DB |
85 | __u8 prio, __u8 ttl, __be32 label, |
86 | __be16 src_port, __be16 dst_port, bool nocheck) | |
6a93cc90 AZ |
87 | { |
88 | struct udphdr *uh; | |
89 | struct ipv6hdr *ip6h; | |
6a93cc90 AZ |
90 | |
91 | __skb_push(skb, sizeof(*uh)); | |
92 | skb_reset_transport_header(skb); | |
93 | uh = udp_hdr(skb); | |
94 | ||
95 | uh->dest = dst_port; | |
96 | uh->source = src_port; | |
97 | ||
98 | uh->len = htons(skb->len); | |
6a93cc90 | 99 | |
6a93cc90 AZ |
100 | skb_dst_set(skb, dst); |
101 | ||
d998f8ef | 102 | udp6_set_csum(nocheck, skb, saddr, daddr, skb->len); |
6a93cc90 AZ |
103 | |
104 | __skb_push(skb, sizeof(*ip6h)); | |
105 | skb_reset_network_header(skb); | |
106 | ip6h = ipv6_hdr(skb); | |
13461144 | 107 | ip6_flow_hdr(ip6h, prio, label); |
6a93cc90 AZ |
108 | ip6h->payload_len = htons(skb->len); |
109 | ip6h->nexthdr = IPPROTO_UDP; | |
110 | ip6h->hop_limit = ttl; | |
111 | ip6h->daddr = *daddr; | |
112 | ip6h->saddr = *saddr; | |
113 | ||
79b16aad | 114 | ip6tunnel_xmit(sk, skb, dev); |
6a93cc90 AZ |
115 | return 0; |
116 | } | |
117 | EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb); | |
3fcb95a8 TH |
118 | |
119 | MODULE_LICENSE("GPL"); |