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TOMOYO Linux Cross Reference
Linux/net/ipv6/ip6_udp_tunnel.c

Version: ~ [ linux-6.2-rc3 ] ~ [ linux-6.1.5 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.87 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.162 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.228 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.269 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.302 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.302 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
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  1 #include <linux/module.h>
  2 #include <linux/errno.h>
  3 #include <linux/socket.h>
  4 #include <linux/udp.h>
  5 #include <linux/types.h>
  6 #include <linux/kernel.h>
  7 #include <linux/in6.h>
  8 #include <net/udp.h>
  9 #include <net/udp_tunnel.h>
 10 #include <net/net_namespace.h>
 11 #include <net/netns/generic.h>
 12 #include <net/ip6_tunnel.h>
 13 #include <net/ip6_checksum.h>
 14 
 15 int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg,
 16                      struct socket **sockp)
 17 {
 18         struct sockaddr_in6 udp6_addr = {};
 19         int err;
 20         struct socket *sock = NULL;
 21 
 22         err = sock_create_kern(net, AF_INET6, SOCK_DGRAM, 0, &sock);
 23         if (err < 0)
 24                 goto error;
 25 
 26         if (cfg->ipv6_v6only) {
 27                 int val = 1;
 28 
 29                 err = kernel_setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
 30                                         (char *) &val, sizeof(val));
 31                 if (err < 0)
 32                         goto error;
 33         }
 34 
 35         udp6_addr.sin6_family = AF_INET6;
 36         memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
 37                sizeof(udp6_addr.sin6_addr));
 38         udp6_addr.sin6_port = cfg->local_udp_port;
 39         err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
 40                           sizeof(udp6_addr));
 41         if (err < 0)
 42                 goto error;
 43 
 44         if (cfg->peer_udp_port) {
 45                 memset(&udp6_addr, 0, sizeof(udp6_addr));
 46                 udp6_addr.sin6_family = AF_INET6;
 47                 memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
 48                        sizeof(udp6_addr.sin6_addr));
 49                 udp6_addr.sin6_port = cfg->peer_udp_port;
 50                 err = kernel_connect(sock,
 51                                      (struct sockaddr *)&udp6_addr,
 52                                      sizeof(udp6_addr), 0);
 53         }
 54         if (err < 0)
 55                 goto error;
 56 
 57         udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
 58         udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
 59 
 60         *sockp = sock;
 61         return 0;
 62 
 63 error:
 64         if (sock) {
 65                 kernel_sock_shutdown(sock, SHUT_RDWR);
 66                 sock_release(sock);
 67         }
 68         *sockp = NULL;
 69         return err;
 70 }
 71 EXPORT_SYMBOL_GPL(udp_sock_create6);
 72 
 73 int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk,
 74                          struct sk_buff *skb,
 75                          struct net_device *dev, struct in6_addr *saddr,
 76                          struct in6_addr *daddr,
 77                          __u8 prio, __u8 ttl, __be16 src_port,
 78                          __be16 dst_port, bool nocheck)
 79 {
 80         struct udphdr *uh;
 81         struct ipv6hdr *ip6h;
 82 
 83         __skb_push(skb, sizeof(*uh));
 84         skb_reset_transport_header(skb);
 85         uh = udp_hdr(skb);
 86 
 87         uh->dest = dst_port;
 88         uh->source = src_port;
 89 
 90         uh->len = htons(skb->len);
 91 
 92         memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
 93         IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
 94                             | IPSKB_REROUTED);
 95         skb_dst_set(skb, dst);
 96 
 97         udp6_set_csum(nocheck, skb, saddr, daddr, skb->len);
 98 
 99         __skb_push(skb, sizeof(*ip6h));
100         skb_reset_network_header(skb);
101         ip6h              = ipv6_hdr(skb);
102         ip6_flow_hdr(ip6h, prio, htonl(0));
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 
109         ip6tunnel_xmit(sk, skb, dev);
110         return 0;
111 }
112 EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
113 
114 MODULE_LICENSE("GPL");
115 

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