Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
8024e028 TH |
2 | #include <linux/module.h> |
3 | #include <linux/errno.h> | |
4 | #include <linux/socket.h> | |
8024e028 | 5 | #include <linux/kernel.h> |
c29a70d2 | 6 | #include <net/dst_metadata.h> |
8024e028 TH |
7 | #include <net/udp.h> |
8 | #include <net/udp_tunnel.h> | |
8024e028 | 9 | |
fd384412 AZ |
10 | int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, |
11 | struct socket **sockp) | |
8024e028 | 12 | { |
6a93cc90 | 13 | int err; |
8024e028 | 14 | struct socket *sock = NULL; |
fd384412 | 15 | struct sockaddr_in udp_addr; |
8024e028 | 16 | |
26abe143 | 17 | err = sock_create_kern(net, AF_INET, SOCK_DGRAM, 0, &sock); |
fd384412 AZ |
18 | if (err < 0) |
19 | goto error; | |
8024e028 | 20 | |
da5095d0 | 21 | if (cfg->bind_ifindex) { |
8ea204c2 | 22 | err = sock_bindtoindex(sock->sk, cfg->bind_ifindex, true); |
da5095d0 AB |
23 | if (err < 0) |
24 | goto error; | |
25 | } | |
26 | ||
fd384412 AZ |
27 | udp_addr.sin_family = AF_INET; |
28 | udp_addr.sin_addr = cfg->local_ip; | |
29 | udp_addr.sin_port = cfg->local_udp_port; | |
30 | err = kernel_bind(sock, (struct sockaddr *)&udp_addr, | |
31 | sizeof(udp_addr)); | |
32 | if (err < 0) | |
33 | goto error; | |
8024e028 | 34 | |
fd384412 | 35 | if (cfg->peer_udp_port) { |
8024e028 | 36 | udp_addr.sin_family = AF_INET; |
fd384412 AZ |
37 | udp_addr.sin_addr = cfg->peer_ip; |
38 | udp_addr.sin_port = cfg->peer_udp_port; | |
39 | err = kernel_connect(sock, (struct sockaddr *)&udp_addr, | |
40 | sizeof(udp_addr), 0); | |
8024e028 TH |
41 | if (err < 0) |
42 | goto error; | |
8024e028 TH |
43 | } |
44 | ||
fd384412 | 45 | sock->sk->sk_no_check_tx = !cfg->use_udp_checksums; |
8024e028 TH |
46 | |
47 | *sockp = sock; | |
8024e028 TH |
48 | return 0; |
49 | ||
50 | error: | |
51 | if (sock) { | |
52 | kernel_sock_shutdown(sock, SHUT_RDWR); | |
26abe143 | 53 | sock_release(sock); |
8024e028 TH |
54 | } |
55 | *sockp = NULL; | |
56 | return err; | |
57 | } | |
fd384412 | 58 | EXPORT_SYMBOL(udp_sock_create4); |
8024e028 | 59 | |
6a93cc90 AZ |
60 | void setup_udp_tunnel_sock(struct net *net, struct socket *sock, |
61 | struct udp_tunnel_sock_cfg *cfg) | |
62 | { | |
63 | struct sock *sk = sock->sk; | |
64 | ||
65 | /* Disable multicast loopback */ | |
b09bde5c | 66 | inet_clear_bit(MC_LOOP, sk); |
6a93cc90 AZ |
67 | |
68 | /* Enable CHECKSUM_UNNECESSARY to CHECKSUM_COMPLETE conversion */ | |
224d019c | 69 | inet_inc_convert_csum(sk); |
6a93cc90 AZ |
70 | |
71 | rcu_assign_sk_user_data(sk, cfg->sk_user_data); | |
72 | ||
73 | udp_sk(sk)->encap_type = cfg->encap_type; | |
74 | udp_sk(sk)->encap_rcv = cfg->encap_rcv; | |
ac56a0b4 | 75 | udp_sk(sk)->encap_err_rcv = cfg->encap_err_rcv; |
a36e185e | 76 | udp_sk(sk)->encap_err_lookup = cfg->encap_err_lookup; |
6a93cc90 | 77 | udp_sk(sk)->encap_destroy = cfg->encap_destroy; |
38fd2af2 TH |
78 | udp_sk(sk)->gro_receive = cfg->gro_receive; |
79 | udp_sk(sk)->gro_complete = cfg->gro_complete; | |
6a93cc90 AZ |
80 | |
81 | udp_tunnel_encap_enable(sock); | |
82 | } | |
83 | EXPORT_SYMBOL_GPL(setup_udp_tunnel_sock); | |
84 | ||
e7b3db5e AD |
85 | void udp_tunnel_push_rx_port(struct net_device *dev, struct socket *sock, |
86 | unsigned short type) | |
87 | { | |
88 | struct sock *sk = sock->sk; | |
89 | struct udp_tunnel_info ti; | |
90 | ||
91 | ti.type = type; | |
92 | ti.sa_family = sk->sk_family; | |
93 | ti.port = inet_sk(sk)->inet_sport; | |
94 | ||
876c4384 | 95 | udp_tunnel_nic_add_port(dev, &ti); |
e7b3db5e AD |
96 | } |
97 | EXPORT_SYMBOL_GPL(udp_tunnel_push_rx_port); | |
98 | ||
296d8ee3 SD |
99 | void udp_tunnel_drop_rx_port(struct net_device *dev, struct socket *sock, |
100 | unsigned short type) | |
101 | { | |
102 | struct sock *sk = sock->sk; | |
103 | struct udp_tunnel_info ti; | |
104 | ||
296d8ee3 SD |
105 | ti.type = type; |
106 | ti.sa_family = sk->sk_family; | |
107 | ti.port = inet_sk(sk)->inet_sport; | |
108 | ||
876c4384 | 109 | udp_tunnel_nic_del_port(dev, &ti); |
296d8ee3 SD |
110 | } |
111 | EXPORT_SYMBOL_GPL(udp_tunnel_drop_rx_port); | |
112 | ||
e7b3db5e AD |
113 | /* Notify netdevs that UDP port started listening */ |
114 | void udp_tunnel_notify_add_rx_port(struct socket *sock, unsigned short type) | |
115 | { | |
116 | struct sock *sk = sock->sk; | |
117 | struct net *net = sock_net(sk); | |
118 | struct udp_tunnel_info ti; | |
119 | struct net_device *dev; | |
120 | ||
121 | ti.type = type; | |
122 | ti.sa_family = sk->sk_family; | |
123 | ti.port = inet_sk(sk)->inet_sport; | |
124 | ||
125 | rcu_read_lock(); | |
1938ee1f | 126 | for_each_netdev_rcu(net, dev) { |
876c4384 | 127 | udp_tunnel_nic_add_port(dev, &ti); |
1938ee1f | 128 | } |
e7b3db5e AD |
129 | rcu_read_unlock(); |
130 | } | |
131 | EXPORT_SYMBOL_GPL(udp_tunnel_notify_add_rx_port); | |
132 | ||
e7b3db5e AD |
133 | /* Notify netdevs that UDP port is no more listening */ |
134 | void udp_tunnel_notify_del_rx_port(struct socket *sock, unsigned short type) | |
135 | { | |
136 | struct sock *sk = sock->sk; | |
137 | struct net *net = sock_net(sk); | |
138 | struct udp_tunnel_info ti; | |
139 | struct net_device *dev; | |
140 | ||
141 | ti.type = type; | |
142 | ti.sa_family = sk->sk_family; | |
143 | ti.port = inet_sk(sk)->inet_sport; | |
144 | ||
145 | rcu_read_lock(); | |
1938ee1f | 146 | for_each_netdev_rcu(net, dev) { |
876c4384 | 147 | udp_tunnel_nic_del_port(dev, &ti); |
1938ee1f | 148 | } |
e7b3db5e AD |
149 | rcu_read_unlock(); |
150 | } | |
151 | EXPORT_SYMBOL_GPL(udp_tunnel_notify_del_rx_port); | |
152 | ||
039f5062 PS |
153 | void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb, |
154 | __be32 src, __be32 dst, __u8 tos, __u8 ttl, | |
155 | __be16 df, __be16 src_port, __be16 dst_port, | |
156 | bool xnet, bool nocheck) | |
6a93cc90 AZ |
157 | { |
158 | struct udphdr *uh; | |
159 | ||
160 | __skb_push(skb, sizeof(*uh)); | |
161 | skb_reset_transport_header(skb); | |
162 | uh = udp_hdr(skb); | |
163 | ||
164 | uh->dest = dst_port; | |
165 | uh->source = src_port; | |
166 | uh->len = htons(skb->len); | |
167 | ||
5146d1f1 BH |
168 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
169 | ||
d998f8ef | 170 | udp_set_csum(nocheck, skb, src, dst, skb->len); |
6a93cc90 | 171 | |
039f5062 | 172 | iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP, tos, ttl, df, xnet); |
6a93cc90 AZ |
173 | } |
174 | EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb); | |
175 | ||
176 | void udp_tunnel_sock_release(struct socket *sock) | |
177 | { | |
178 | rcu_assign_sk_user_data(sock->sk, NULL); | |
3cf7203c | 179 | synchronize_rcu(); |
6a93cc90 | 180 | kernel_sock_shutdown(sock, SHUT_RDWR); |
26abe143 | 181 | sock_release(sock); |
6a93cc90 AZ |
182 | } |
183 | EXPORT_SYMBOL_GPL(udp_tunnel_sock_release); | |
184 | ||
c29a70d2 PS |
185 | struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family, |
186 | __be16 flags, __be64 tunnel_id, int md_size) | |
187 | { | |
188 | struct metadata_dst *tun_dst; | |
189 | struct ip_tunnel_info *info; | |
190 | ||
191 | if (family == AF_INET) | |
192 | tun_dst = ip_tun_rx_dst(skb, flags, tunnel_id, md_size); | |
193 | else | |
194 | tun_dst = ipv6_tun_rx_dst(skb, flags, tunnel_id, md_size); | |
195 | if (!tun_dst) | |
196 | return NULL; | |
197 | ||
198 | info = &tun_dst->u.tun_info; | |
199 | info->key.tp_src = udp_hdr(skb)->source; | |
200 | info->key.tp_dst = udp_hdr(skb)->dest; | |
201 | if (udp_hdr(skb)->check) | |
202 | info->key.tun_flags |= TUNNEL_CSUM; | |
203 | return tun_dst; | |
204 | } | |
205 | EXPORT_SYMBOL_GPL(udp_tun_rx_dst); | |
206 | ||
8024e028 | 207 | MODULE_LICENSE("GPL"); |