~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/ipv6/fou6.c

Version: ~ [ linux-5.12-rc7 ] ~ [ linux-5.11.13 ] ~ [ linux-5.10.29 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.111 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.186 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.230 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.266 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.266 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 #include <linux/module.h>
  2 #include <linux/errno.h>
  3 #include <linux/socket.h>
  4 #include <linux/skbuff.h>
  5 #include <linux/ip.h>
  6 #include <linux/udp.h>
  7 #include <linux/types.h>
  8 #include <linux/kernel.h>
  9 #include <net/fou.h>
 10 #include <net/ip.h>
 11 #include <net/ip6_tunnel.h>
 12 #include <net/ip6_checksum.h>
 13 #include <net/protocol.h>
 14 #include <net/udp.h>
 15 #include <net/udp_tunnel.h>
 16 
 17 #if IS_ENABLED(CONFIG_IPV6_FOU_TUNNEL)
 18 
 19 static void fou6_build_udp(struct sk_buff *skb, struct ip_tunnel_encap *e,
 20                            struct flowi6 *fl6, u8 *protocol, __be16 sport)
 21 {
 22         struct udphdr *uh;
 23 
 24         skb_push(skb, sizeof(struct udphdr));
 25         skb_reset_transport_header(skb);
 26 
 27         uh = udp_hdr(skb);
 28 
 29         uh->dest = e->dport;
 30         uh->source = sport;
 31         uh->len = htons(skb->len);
 32         udp6_set_csum(!(e->flags & TUNNEL_ENCAP_FLAG_CSUM6), skb,
 33                       &fl6->saddr, &fl6->daddr, skb->len);
 34 
 35         *protocol = IPPROTO_UDP;
 36 }
 37 
 38 static int fou6_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
 39                              u8 *protocol, struct flowi6 *fl6)
 40 {
 41         __be16 sport;
 42         int err;
 43         int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM6 ?
 44                 SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
 45 
 46         err = __fou_build_header(skb, e, protocol, &sport, type);
 47         if (err)
 48                 return err;
 49 
 50         fou6_build_udp(skb, e, fl6, protocol, sport);
 51 
 52         return 0;
 53 }
 54 
 55 static int gue6_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
 56                              u8 *protocol, struct flowi6 *fl6)
 57 {
 58         __be16 sport;
 59         int err;
 60         int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM6 ?
 61                 SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
 62 
 63         err = __gue_build_header(skb, e, protocol, &sport, type);
 64         if (err)
 65                 return err;
 66 
 67         fou6_build_udp(skb, e, fl6, protocol, sport);
 68 
 69         return 0;
 70 }
 71 
 72 static const struct ip6_tnl_encap_ops fou_ip6tun_ops = {
 73         .encap_hlen = fou_encap_hlen,
 74         .build_header = fou6_build_header,
 75 };
 76 
 77 static const struct ip6_tnl_encap_ops gue_ip6tun_ops = {
 78         .encap_hlen = gue_encap_hlen,
 79         .build_header = gue6_build_header,
 80 };
 81 
 82 static int ip6_tnl_encap_add_fou_ops(void)
 83 {
 84         int ret;
 85 
 86         ret = ip6_tnl_encap_add_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
 87         if (ret < 0) {
 88                 pr_err("can't add fou6 ops\n");
 89                 return ret;
 90         }
 91 
 92         ret = ip6_tnl_encap_add_ops(&gue_ip6tun_ops, TUNNEL_ENCAP_GUE);
 93         if (ret < 0) {
 94                 pr_err("can't add gue6 ops\n");
 95                 ip6_tnl_encap_del_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
 96                 return ret;
 97         }
 98 
 99         return 0;
100 }
101 
102 static void ip6_tnl_encap_del_fou_ops(void)
103 {
104         ip6_tnl_encap_del_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
105         ip6_tnl_encap_del_ops(&gue_ip6tun_ops, TUNNEL_ENCAP_GUE);
106 }
107 
108 #else
109 
110 static int ip6_tnl_encap_add_fou_ops(void)
111 {
112         return 0;
113 }
114 
115 static void ip6_tnl_encap_del_fou_ops(void)
116 {
117 }
118 
119 #endif
120 
121 static int __init fou6_init(void)
122 {
123         int ret;
124 
125         ret = ip6_tnl_encap_add_fou_ops();
126 
127         return ret;
128 }
129 
130 static void __exit fou6_fini(void)
131 {
132         ip6_tnl_encap_del_fou_ops();
133 }
134 
135 module_init(fou6_init);
136 module_exit(fou6_fini);
137 MODULE_AUTHOR("Tom Herbert <therbert@google.com>");
138 MODULE_LICENSE("GPL");
139 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp