Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 2 | * Linux NET3: GRE over IP protocol decoder. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Authors: Alexey Kuznetsov (kuznet@ms2.inr.ac.ru) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
Joe Perches | afd46503 | 2012-03-12 07:03:32 +0000 | [diff] [blame] | 13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 14 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 15 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <asm/uaccess.h> |
| 21 | #include <linux/skbuff.h> |
| 22 | #include <linux/netdevice.h> |
| 23 | #include <linux/in.h> |
| 24 | #include <linux/tcp.h> |
| 25 | #include <linux/udp.h> |
| 26 | #include <linux/if_arp.h> |
| 27 | #include <linux/mroute.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/in6.h> |
| 30 | #include <linux/inetdevice.h> |
| 31 | #include <linux/igmp.h> |
| 32 | #include <linux/netfilter_ipv4.h> |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 33 | #include <linux/etherdevice.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 34 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #include <net/sock.h> |
| 37 | #include <net/ip.h> |
| 38 | #include <net/icmp.h> |
| 39 | #include <net/protocol.h> |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 40 | #include <net/ip_tunnels.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <net/arp.h> |
| 42 | #include <net/checksum.h> |
| 43 | #include <net/dsfield.h> |
| 44 | #include <net/inet_ecn.h> |
| 45 | #include <net/xfrm.h> |
Pavel Emelyanov | 59a4c75 | 2008-04-16 01:08:53 -0700 | [diff] [blame] | 46 | #include <net/net_namespace.h> |
| 47 | #include <net/netns/generic.h> |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 48 | #include <net/rtnetlink.h> |
Dmitry Kozlov | 00959ad | 2010-08-21 23:05:39 -0700 | [diff] [blame] | 49 | #include <net/gre.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 51 | #if IS_ENABLED(CONFIG_IPV6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <net/ipv6.h> |
| 53 | #include <net/ip6_fib.h> |
| 54 | #include <net/ip6_route.h> |
| 55 | #endif |
| 56 | |
| 57 | /* |
| 58 | Problems & solutions |
| 59 | -------------------- |
| 60 | |
| 61 | 1. The most important issue is detecting local dead loops. |
| 62 | They would cause complete host lockup in transmit, which |
| 63 | would be "resolved" by stack overflow or, if queueing is enabled, |
| 64 | with infinite looping in net_bh. |
| 65 | |
| 66 | We cannot track such dead loops during route installation, |
| 67 | it is infeasible task. The most general solutions would be |
| 68 | to keep skb->encapsulation counter (sort of local ttl), |
Eric Dumazet | 6d0722a | 2010-09-29 23:35:10 -0700 | [diff] [blame] | 69 | and silently drop packet when it expires. It is a good |
stephen hemminger | bff5285 | 2012-02-24 08:08:20 +0000 | [diff] [blame] | 70 | solution, but it supposes maintaining new variable in ALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | skb, even if no tunneling is used. |
| 72 | |
Eric Dumazet | 6d0722a | 2010-09-29 23:35:10 -0700 | [diff] [blame] | 73 | Current solution: xmit_recursion breaks dead loops. This is a percpu |
| 74 | counter, since when we enter the first ndo_xmit(), cpu migration is |
| 75 | forbidden. We force an exit if this counter reaches RECURSION_LIMIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | 2. Networking dead loops would not kill routers, but would really |
| 78 | kill network. IP hop limit plays role of "t->recursion" in this case, |
| 79 | if we copy it from packet being encapsulated to upper header. |
| 80 | It is very good solution, but it introduces two problems: |
| 81 | |
| 82 | - Routing protocols, using packets with ttl=1 (OSPF, RIP2), |
| 83 | do not work over tunnels. |
| 84 | - traceroute does not work. I planned to relay ICMP from tunnel, |
| 85 | so that this problem would be solved and traceroute output |
| 86 | would even more informative. This idea appeared to be wrong: |
| 87 | only Linux complies to rfc1812 now (yes, guys, Linux is the only |
| 88 | true router now :-)), all routers (at least, in neighbourhood of mine) |
| 89 | return only 8 bytes of payload. It is the end. |
| 90 | |
| 91 | Hence, if we want that OSPF worked or traceroute said something reasonable, |
| 92 | we should search for another solution. |
| 93 | |
| 94 | One of them is to parse packet trying to detect inner encapsulation |
| 95 | made by our node. It is difficult or even impossible, especially, |
stephen hemminger | bff5285 | 2012-02-24 08:08:20 +0000 | [diff] [blame] | 96 | taking into account fragmentation. TO be short, ttl is not solution at all. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | Current solution: The solution was UNEXPECTEDLY SIMPLE. |
| 99 | We force DF flag on tunnels with preconfigured hop limit, |
| 100 | that is ALL. :-) Well, it does not remove the problem completely, |
| 101 | but exponential growth of network traffic is changed to linear |
| 102 | (branches, that exceed pmtu are pruned) and tunnel mtu |
stephen hemminger | bff5285 | 2012-02-24 08:08:20 +0000 | [diff] [blame] | 103 | rapidly degrades to value <68, where looping stops. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | Yes, it is not good if there exists a router in the loop, |
| 105 | which does not force DF, even when encapsulating packets have DF set. |
| 106 | But it is not our problem! Nobody could accuse us, we made |
| 107 | all that we could make. Even if it is your gated who injected |
| 108 | fatal route to network, even if it were you who configured |
| 109 | fatal static route: you are innocent. :-) |
| 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | Alexey Kuznetsov. |
| 112 | */ |
| 113 | |
stephen hemminger | eccc1bb | 2012-09-25 11:02:48 +0000 | [diff] [blame] | 114 | static bool log_ecn_error = true; |
| 115 | module_param(log_ecn_error, bool, 0644); |
| 116 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); |
| 117 | |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 118 | static struct rtnl_link_ops ipgre_link_ops __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | static int ipgre_tunnel_init(struct net_device *dev); |
Pavel Emelyanov | eb8ce74 | 2008-04-16 01:10:26 -0700 | [diff] [blame] | 120 | |
Eric Dumazet | f99189b | 2009-11-17 10:42:49 +0000 | [diff] [blame] | 121 | static int ipgre_net_id __read_mostly; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 122 | static int gre_tap_net_id __read_mostly; |
Pavel Emelyanov | eb8ce74 | 2008-04-16 01:10:26 -0700 | [diff] [blame] | 123 | |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 124 | static int ipgre_err(struct sk_buff *skb, u32 info, |
| 125 | const struct tnl_ptk_info *tpi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 128 | /* All the routers (except for Linux) return only |
| 129 | 8 bytes of packet payload. It means, that precise relaying of |
| 130 | ICMP in the real Internet is absolutely infeasible. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 132 | Moreover, Cisco "wise men" put GRE key to the third word |
| 133 | in GRE header. It makes impossible maintaining even soft |
| 134 | state for keyed GRE tunnels with enabled checksum. Tell |
| 135 | them "thank you". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 137 | Well, I wonder, rfc1812 was written by Cisco employee, |
| 138 | what the hell these idiots break standards established |
| 139 | by themselves??? |
| 140 | */ |
| 141 | struct net *net = dev_net(skb->dev); |
| 142 | struct ip_tunnel_net *itn; |
Eric Dumazet | 96f5a84 | 2013-05-18 08:36:03 +0000 | [diff] [blame] | 143 | const struct iphdr *iph; |
Arnaldo Carvalho de Melo | 88c7664 | 2007-03-13 14:43:18 -0300 | [diff] [blame] | 144 | const int type = icmp_hdr(skb)->type; |
| 145 | const int code = icmp_hdr(skb)->code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | struct ip_tunnel *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | switch (type) { |
| 149 | default: |
| 150 | case ICMP_PARAMETERPROB: |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 151 | return PACKET_RCVD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
| 153 | case ICMP_DEST_UNREACH: |
| 154 | switch (code) { |
| 155 | case ICMP_SR_FAILED: |
| 156 | case ICMP_PORT_UNREACH: |
| 157 | /* Impossible event. */ |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 158 | return PACKET_RCVD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | default: |
| 160 | /* All others are translated to HOST_UNREACH. |
| 161 | rfc2003 contains "deep thoughts" about NET_UNREACH, |
| 162 | I believe they are just ether pollution. --ANK |
| 163 | */ |
| 164 | break; |
| 165 | } |
| 166 | break; |
| 167 | case ICMP_TIME_EXCEEDED: |
| 168 | if (code != ICMP_EXC_TTL) |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 169 | return PACKET_RCVD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | break; |
David S. Miller | 55be7a9 | 2012-07-11 21:27:49 -0700 | [diff] [blame] | 171 | |
| 172 | case ICMP_REDIRECT: |
| 173 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 176 | if (tpi->proto == htons(ETH_P_TEB)) |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 177 | itn = net_generic(net, gre_tap_net_id); |
| 178 | else |
| 179 | itn = net_generic(net, ipgre_net_id); |
| 180 | |
Duan Jiong | c0c0c50 | 2014-01-28 11:49:43 +0800 | [diff] [blame] | 181 | iph = (const struct iphdr *)(icmp_hdr(skb) + 1); |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 182 | t = ip_tunnel_lookup(itn, skb->dev->ifindex, tpi->flags, |
| 183 | iph->daddr, iph->saddr, tpi->key); |
stephen hemminger | d208328 | 2012-09-24 18:12:23 +0000 | [diff] [blame] | 184 | |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 185 | if (t == NULL) |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 186 | return PACKET_REJECT; |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 187 | |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 188 | if (t->parms.iph.daddr == 0 || |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 189 | ipv4_is_multicast(t->parms.iph.daddr)) |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 190 | return PACKET_RCVD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 193 | return PACKET_RCVD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Wei Yongjun | da6185d8 | 2009-02-24 23:34:48 -0800 | [diff] [blame] | 195 | if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | t->err_count++; |
| 197 | else |
| 198 | t->err_count = 1; |
| 199 | t->err_time = jiffies; |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 200 | return PACKET_RCVD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 203 | static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | { |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 205 | struct net *net = dev_net(skb->dev); |
| 206 | struct ip_tunnel_net *itn; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 207 | const struct iphdr *iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | struct ip_tunnel *tunnel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 210 | if (tpi->proto == htons(ETH_P_TEB)) |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 211 | itn = net_generic(net, gre_tap_net_id); |
| 212 | else |
| 213 | itn = net_generic(net, ipgre_net_id); |
| 214 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 215 | iph = ip_hdr(skb); |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 216 | tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, tpi->flags, |
| 217 | iph->saddr, iph->daddr, tpi->key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
stephen hemminger | d208328 | 2012-09-24 18:12:23 +0000 | [diff] [blame] | 219 | if (tunnel) { |
Timo Teräs | 0e3da5b | 2013-12-16 11:02:09 +0200 | [diff] [blame] | 220 | skb_pop_mac_header(skb); |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 221 | ip_tunnel_rcv(tunnel, skb, tpi, log_ecn_error); |
| 222 | return PACKET_RCVD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 224 | return PACKET_REJECT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 227 | static void __gre_xmit(struct sk_buff *skb, struct net_device *dev, |
| 228 | const struct iphdr *tnl_params, |
| 229 | __be16 proto) |
| 230 | { |
| 231 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 232 | struct tnl_ptk_info tpi; |
| 233 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 234 | tpi.flags = tunnel->parms.o_flags; |
| 235 | tpi.proto = proto; |
| 236 | tpi.key = tunnel->parms.o_key; |
| 237 | if (tunnel->parms.o_flags & TUNNEL_SEQ) |
| 238 | tunnel->o_seqno++; |
| 239 | tpi.seq = htonl(tunnel->o_seqno); |
Eric Dumazet | cef401d | 2013-01-25 20:34:37 +0000 | [diff] [blame] | 240 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 241 | /* Push GRE header. */ |
Pravin B Shelar | 752f36d | 2013-06-17 17:49:45 -0700 | [diff] [blame] | 242 | gre_build_header(skb, &tpi, tunnel->hlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Nicolas Dichtel | bf3d6a8 | 2013-05-27 23:48:15 +0000 | [diff] [blame] | 244 | ip_tunnel_xmit(skb, dev, tnl_params, tnl_params->protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 247 | static netdev_tx_t ipgre_xmit(struct sk_buff *skb, |
| 248 | struct net_device *dev) |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 249 | { |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 250 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 251 | const struct iphdr *tnl_params; |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 252 | |
Pravin B Shelar | 45f2e99 | 2013-06-17 17:49:51 -0700 | [diff] [blame] | 253 | skb = gre_handle_offloads(skb, !!(tunnel->parms.o_flags&TUNNEL_CSUM)); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 254 | if (IS_ERR(skb)) |
| 255 | goto out; |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 256 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 257 | if (dev->header_ops) { |
| 258 | /* Need space for new headers */ |
| 259 | if (skb_cow_head(skb, dev->needed_headroom - |
Chen Gang | 2bac7cb | 2013-04-22 20:45:42 +0000 | [diff] [blame] | 260 | (tunnel->hlen + sizeof(struct iphdr)))) |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 261 | goto free_skb; |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 262 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 263 | tnl_params = (const struct iphdr *)skb->data; |
Eric Dumazet | e985aad | 2010-09-27 03:57:11 +0000 | [diff] [blame] | 264 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 265 | /* Pull skb since ip_tunnel_xmit() needs skb->data pointing |
| 266 | * to gre header. |
| 267 | */ |
| 268 | skb_pull(skb, tunnel->hlen + sizeof(struct iphdr)); |
| 269 | } else { |
| 270 | if (skb_cow_head(skb, dev->needed_headroom)) |
| 271 | goto free_skb; |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 272 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 273 | tnl_params = &tunnel->parms.iph; |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 274 | } |
| 275 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 276 | __gre_xmit(skb, dev, tnl_params, skb->protocol); |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 277 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 278 | return NETDEV_TX_OK; |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 279 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 280 | free_skb: |
Eric Dumazet | 3acfa1e | 2014-01-18 18:27:49 -0800 | [diff] [blame] | 281 | kfree_skb(skb); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 282 | out: |
| 283 | dev->stats.tx_dropped++; |
| 284 | return NETDEV_TX_OK; |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 285 | } |
| 286 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 287 | static netdev_tx_t gre_tap_xmit(struct sk_buff *skb, |
| 288 | struct net_device *dev) |
| 289 | { |
| 290 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 291 | |
Pravin B Shelar | 45f2e99 | 2013-06-17 17:49:51 -0700 | [diff] [blame] | 292 | skb = gre_handle_offloads(skb, !!(tunnel->parms.o_flags&TUNNEL_CSUM)); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 293 | if (IS_ERR(skb)) |
| 294 | goto out; |
| 295 | |
| 296 | if (skb_cow_head(skb, dev->needed_headroom)) |
| 297 | goto free_skb; |
| 298 | |
| 299 | __gre_xmit(skb, dev, &tunnel->parms.iph, htons(ETH_P_TEB)); |
| 300 | |
| 301 | return NETDEV_TX_OK; |
| 302 | |
| 303 | free_skb: |
Eric Dumazet | 3acfa1e | 2014-01-18 18:27:49 -0800 | [diff] [blame] | 304 | kfree_skb(skb); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 305 | out: |
| 306 | dev->stats.tx_dropped++; |
| 307 | return NETDEV_TX_OK; |
| 308 | } |
| 309 | |
| 310 | static int ipgre_tunnel_ioctl(struct net_device *dev, |
| 311 | struct ifreq *ifr, int cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | { |
| 313 | int err = 0; |
| 314 | struct ip_tunnel_parm p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 316 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 317 | return -EFAULT; |
Cong Wang | 6c734fb | 2013-06-29 12:02:59 +0800 | [diff] [blame] | 318 | if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) { |
| 319 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_GRE || |
| 320 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF)) || |
| 321 | ((p.i_flags|p.o_flags)&(GRE_VERSION|GRE_ROUTING))) |
| 322 | return -EINVAL; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 323 | } |
| 324 | p.i_flags = gre_flags_to_tnl_flags(p.i_flags); |
| 325 | p.o_flags = gre_flags_to_tnl_flags(p.o_flags); |
| 326 | |
| 327 | err = ip_tunnel_ioctl(dev, &p, cmd); |
| 328 | if (err) |
| 329 | return err; |
| 330 | |
| 331 | p.i_flags = tnl_flags_to_gre_flags(p.i_flags); |
| 332 | p.o_flags = tnl_flags_to_gre_flags(p.o_flags); |
| 333 | |
| 334 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
| 335 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | return 0; |
| 337 | } |
| 338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | /* Nice toy. Unfortunately, useless in real life :-) |
| 340 | It allows to construct virtual multiprotocol broadcast "LAN" |
| 341 | over the Internet, provided multicast routing is tuned. |
| 342 | |
| 343 | |
| 344 | I have no idea was this bicycle invented before me, |
| 345 | so that I had to set ARPHRD_IPGRE to a random value. |
| 346 | I have an impression, that Cisco could make something similar, |
| 347 | but this feature is apparently missing in IOS<=11.2(8). |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | I set up 10.66.66/24 and fec0:6666:6666::0/96 as virtual networks |
| 350 | with broadcast 224.66.66.66. If you have access to mbone, play with me :-) |
| 351 | |
| 352 | ping -t 255 224.66.66.66 |
| 353 | |
| 354 | If nobody answers, mbone does not work. |
| 355 | |
| 356 | ip tunnel add Universe mode gre remote 224.66.66.66 local <Your_real_addr> ttl 255 |
| 357 | ip addr add 10.66.66.<somewhat>/24 dev Universe |
| 358 | ifconfig Universe up |
| 359 | ifconfig Universe add fe80::<Your_real_addr>/10 |
| 360 | ifconfig Universe add fec0:6666:6666::<Your_real_addr>/96 |
| 361 | ftp 10.66.66.66 |
| 362 | ... |
| 363 | ftp fec0:6666:6666::193.233.7.65 |
| 364 | ... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | */ |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 366 | static int ipgre_header(struct sk_buff *skb, struct net_device *dev, |
| 367 | unsigned short type, |
Eric Dumazet | 1507850 | 2010-09-15 11:07:53 +0000 | [diff] [blame] | 368 | const void *daddr, const void *saddr, unsigned int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 370 | struct ip_tunnel *t = netdev_priv(dev); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 371 | struct iphdr *iph; |
| 372 | struct gre_base_hdr *greh; |
| 373 | |
| 374 | iph = (struct iphdr *)skb_push(skb, t->hlen + sizeof(*iph)); |
| 375 | greh = (struct gre_base_hdr *)(iph+1); |
| 376 | greh->flags = tnl_flags_to_gre_flags(t->parms.o_flags); |
| 377 | greh->protocol = htons(type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
| 379 | memcpy(iph, &t->parms.iph, sizeof(struct iphdr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 381 | /* Set the source hardware address. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | if (saddr) |
| 383 | memcpy(&iph->saddr, saddr, 4); |
Timo Teräs | 6d55cb9 | 2010-03-03 04:01:13 +0000 | [diff] [blame] | 384 | if (daddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | memcpy(&iph->daddr, daddr, 4); |
Timo Teräs | 6d55cb9 | 2010-03-03 04:01:13 +0000 | [diff] [blame] | 386 | if (iph->daddr) |
Timo Teräs | 77a482b | 2013-08-06 13:45:43 +0300 | [diff] [blame] | 387 | return t->hlen + sizeof(*iph); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 388 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 389 | return -(t->hlen + sizeof(*iph)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Timo Teras | 6a5f44d | 2007-10-23 20:31:53 -0700 | [diff] [blame] | 392 | static int ipgre_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
| 393 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 394 | const struct iphdr *iph = (const struct iphdr *) skb_mac_header(skb); |
Timo Teras | 6a5f44d | 2007-10-23 20:31:53 -0700 | [diff] [blame] | 395 | memcpy(haddr, &iph->saddr, 4); |
| 396 | return 4; |
| 397 | } |
| 398 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 399 | static const struct header_ops ipgre_header_ops = { |
| 400 | .create = ipgre_header, |
Timo Teras | 6a5f44d | 2007-10-23 20:31:53 -0700 | [diff] [blame] | 401 | .parse = ipgre_header_parse, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 402 | }; |
| 403 | |
Timo Teras | 6a5f44d | 2007-10-23 20:31:53 -0700 | [diff] [blame] | 404 | #ifdef CONFIG_NET_IPGRE_BROADCAST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | static int ipgre_open(struct net_device *dev) |
| 406 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 407 | struct ip_tunnel *t = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 409 | if (ipv4_is_multicast(t->parms.iph.daddr)) { |
David S. Miller | cbb1e85 | 2011-05-04 12:33:34 -0700 | [diff] [blame] | 410 | struct flowi4 fl4; |
| 411 | struct rtable *rt; |
Eric Dumazet | e985aad | 2010-09-27 03:57:11 +0000 | [diff] [blame] | 412 | |
David S. Miller | cbb1e85 | 2011-05-04 12:33:34 -0700 | [diff] [blame] | 413 | rt = ip_route_output_gre(dev_net(dev), &fl4, |
| 414 | t->parms.iph.daddr, |
| 415 | t->parms.iph.saddr, |
| 416 | t->parms.o_key, |
| 417 | RT_TOS(t->parms.iph.tos), |
| 418 | t->parms.link); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 419 | if (IS_ERR(rt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | return -EADDRNOTAVAIL; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 421 | dev = rt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | ip_rt_put(rt); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 423 | if (__in_dev_get_rtnl(dev) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return -EADDRNOTAVAIL; |
| 425 | t->mlink = dev->ifindex; |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 426 | ip_mc_inc_group(__in_dev_get_rtnl(dev), t->parms.iph.daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | static int ipgre_close(struct net_device *dev) |
| 432 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 433 | struct ip_tunnel *t = netdev_priv(dev); |
Stephen Hemminger | b8c26a3 | 2008-11-20 20:34:29 -0800 | [diff] [blame] | 434 | |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 435 | if (ipv4_is_multicast(t->parms.iph.daddr) && t->mlink) { |
Denis V. Lunev | 7fee0ca | 2008-01-21 17:32:38 -0800 | [diff] [blame] | 436 | struct in_device *in_dev; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 437 | in_dev = inetdev_by_index(dev_net(dev), t->mlink); |
Eric Dumazet | 8723e1b | 2010-10-19 00:39:26 +0000 | [diff] [blame] | 438 | if (in_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | ip_mc_dec_group(in_dev, t->parms.iph.daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | return 0; |
| 442 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | #endif |
| 444 | |
Stephen Hemminger | b8c26a3 | 2008-11-20 20:34:29 -0800 | [diff] [blame] | 445 | static const struct net_device_ops ipgre_netdev_ops = { |
| 446 | .ndo_init = ipgre_tunnel_init, |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 447 | .ndo_uninit = ip_tunnel_uninit, |
Stephen Hemminger | b8c26a3 | 2008-11-20 20:34:29 -0800 | [diff] [blame] | 448 | #ifdef CONFIG_NET_IPGRE_BROADCAST |
| 449 | .ndo_open = ipgre_open, |
| 450 | .ndo_stop = ipgre_close, |
| 451 | #endif |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 452 | .ndo_start_xmit = ipgre_xmit, |
Stephen Hemminger | b8c26a3 | 2008-11-20 20:34:29 -0800 | [diff] [blame] | 453 | .ndo_do_ioctl = ipgre_tunnel_ioctl, |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 454 | .ndo_change_mtu = ip_tunnel_change_mtu, |
| 455 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
Stephen Hemminger | b8c26a3 | 2008-11-20 20:34:29 -0800 | [diff] [blame] | 456 | }; |
| 457 | |
Eric Dumazet | 6b78f16 | 2012-09-13 21:25:33 +0000 | [diff] [blame] | 458 | #define GRE_FEATURES (NETIF_F_SG | \ |
| 459 | NETIF_F_FRAGLIST | \ |
| 460 | NETIF_F_HIGHDMA | \ |
| 461 | NETIF_F_HW_CSUM) |
| 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | static void ipgre_tunnel_setup(struct net_device *dev) |
| 464 | { |
Stephen Hemminger | b8c26a3 | 2008-11-20 20:34:29 -0800 | [diff] [blame] | 465 | dev->netdev_ops = &ipgre_netdev_ops; |
Nicolas Dichtel | 5a45527 | 2014-04-11 15:51:18 +0200 | [diff] [blame] | 466 | dev->type = ARPHRD_IPGRE; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 467 | ip_tunnel_setup(dev, ipgre_net_id); |
| 468 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 470 | static void __gre_tunnel_init(struct net_device *dev) |
| 471 | { |
| 472 | struct ip_tunnel *tunnel; |
| 473 | |
| 474 | tunnel = netdev_priv(dev); |
| 475 | tunnel->hlen = ip_gre_calc_hlen(tunnel->parms.o_flags); |
| 476 | tunnel->parms.iph.protocol = IPPROTO_GRE; |
| 477 | |
| 478 | dev->needed_headroom = LL_MAX_HEADER + sizeof(struct iphdr) + 4; |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 479 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 4; |
Eric Dumazet | 6b78f16 | 2012-09-13 21:25:33 +0000 | [diff] [blame] | 480 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 481 | dev->features |= NETIF_F_NETNS_LOCAL | GRE_FEATURES; |
Eric Dumazet | 6b78f16 | 2012-09-13 21:25:33 +0000 | [diff] [blame] | 482 | dev->hw_features |= GRE_FEATURES; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 483 | |
| 484 | if (!(tunnel->parms.o_flags & TUNNEL_SEQ)) { |
| 485 | /* TCP offload with GRE SEQ is not supported. */ |
| 486 | dev->features |= NETIF_F_GSO_SOFTWARE; |
| 487 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; |
| 488 | /* Can use a lockless transmit, unless we generate |
| 489 | * output sequences |
| 490 | */ |
| 491 | dev->features |= NETIF_F_LLTX; |
| 492 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | static int ipgre_tunnel_init(struct net_device *dev) |
| 496 | { |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 497 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 498 | struct iphdr *iph = &tunnel->parms.iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 500 | __gre_tunnel_init(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 502 | memcpy(dev->dev_addr, &iph->saddr, 4); |
| 503 | memcpy(dev->broadcast, &iph->daddr, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 505 | dev->flags = IFF_NOARP; |
| 506 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
| 507 | dev->addr_len = 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | if (iph->daddr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | #ifdef CONFIG_NET_IPGRE_BROADCAST |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 511 | if (ipv4_is_multicast(iph->daddr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | if (!iph->saddr) |
| 513 | return -EINVAL; |
| 514 | dev->flags = IFF_BROADCAST; |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 515 | dev->header_ops = &ipgre_header_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | } |
| 517 | #endif |
Michal Schmidt | ee34c1e | 2007-12-13 09:46:32 -0800 | [diff] [blame] | 518 | } else |
Timo Teras | 6a5f44d | 2007-10-23 20:31:53 -0700 | [diff] [blame] | 519 | dev->header_ops = &ipgre_header_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 521 | return ip_tunnel_init(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | } |
| 523 | |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 524 | static struct gre_cisco_protocol ipgre_protocol = { |
| 525 | .handler = ipgre_rcv, |
| 526 | .err_handler = ipgre_err, |
| 527 | .priority = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | }; |
| 529 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 530 | static int __net_init ipgre_init_net(struct net *net) |
Pavel Emelyanov | 59a4c75 | 2008-04-16 01:08:53 -0700 | [diff] [blame] | 531 | { |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 532 | return ip_tunnel_init_net(net, ipgre_net_id, &ipgre_link_ops, NULL); |
Pavel Emelyanov | 59a4c75 | 2008-04-16 01:08:53 -0700 | [diff] [blame] | 533 | } |
| 534 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 535 | static void __net_exit ipgre_exit_net(struct net *net) |
Pavel Emelyanov | 59a4c75 | 2008-04-16 01:08:53 -0700 | [diff] [blame] | 536 | { |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 537 | struct ip_tunnel_net *itn = net_generic(net, ipgre_net_id); |
Nicolas Dichtel | 6c742e7 | 2013-08-13 17:51:11 +0200 | [diff] [blame] | 538 | ip_tunnel_delete_net(itn, &ipgre_link_ops); |
Pavel Emelyanov | 59a4c75 | 2008-04-16 01:08:53 -0700 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | static struct pernet_operations ipgre_net_ops = { |
| 542 | .init = ipgre_init_net, |
| 543 | .exit = ipgre_exit_net, |
Eric W. Biederman | cfb8fbf | 2009-11-29 15:46:13 +0000 | [diff] [blame] | 544 | .id = &ipgre_net_id, |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 545 | .size = sizeof(struct ip_tunnel_net), |
Pavel Emelyanov | 59a4c75 | 2008-04-16 01:08:53 -0700 | [diff] [blame] | 546 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 548 | static int ipgre_tunnel_validate(struct nlattr *tb[], struct nlattr *data[]) |
| 549 | { |
| 550 | __be16 flags; |
| 551 | |
| 552 | if (!data) |
| 553 | return 0; |
| 554 | |
| 555 | flags = 0; |
| 556 | if (data[IFLA_GRE_IFLAGS]) |
| 557 | flags |= nla_get_be16(data[IFLA_GRE_IFLAGS]); |
| 558 | if (data[IFLA_GRE_OFLAGS]) |
| 559 | flags |= nla_get_be16(data[IFLA_GRE_OFLAGS]); |
| 560 | if (flags & (GRE_VERSION|GRE_ROUTING)) |
| 561 | return -EINVAL; |
| 562 | |
| 563 | return 0; |
| 564 | } |
| 565 | |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 566 | static int ipgre_tap_validate(struct nlattr *tb[], struct nlattr *data[]) |
| 567 | { |
| 568 | __be32 daddr; |
| 569 | |
| 570 | if (tb[IFLA_ADDRESS]) { |
| 571 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) |
| 572 | return -EINVAL; |
| 573 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) |
| 574 | return -EADDRNOTAVAIL; |
| 575 | } |
| 576 | |
| 577 | if (!data) |
| 578 | goto out; |
| 579 | |
| 580 | if (data[IFLA_GRE_REMOTE]) { |
| 581 | memcpy(&daddr, nla_data(data[IFLA_GRE_REMOTE]), 4); |
| 582 | if (!daddr) |
| 583 | return -EINVAL; |
| 584 | } |
| 585 | |
| 586 | out: |
| 587 | return ipgre_tunnel_validate(tb, data); |
| 588 | } |
| 589 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 590 | static void ipgre_netlink_parms(struct nlattr *data[], struct nlattr *tb[], |
| 591 | struct ip_tunnel_parm *parms) |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 592 | { |
Herbert Xu | 7bb82d9 | 2008-10-11 12:20:15 -0700 | [diff] [blame] | 593 | memset(parms, 0, sizeof(*parms)); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 594 | |
| 595 | parms->iph.protocol = IPPROTO_GRE; |
| 596 | |
| 597 | if (!data) |
| 598 | return; |
| 599 | |
| 600 | if (data[IFLA_GRE_LINK]) |
| 601 | parms->link = nla_get_u32(data[IFLA_GRE_LINK]); |
| 602 | |
| 603 | if (data[IFLA_GRE_IFLAGS]) |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 604 | parms->i_flags = gre_flags_to_tnl_flags(nla_get_be16(data[IFLA_GRE_IFLAGS])); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 605 | |
| 606 | if (data[IFLA_GRE_OFLAGS]) |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 607 | parms->o_flags = gre_flags_to_tnl_flags(nla_get_be16(data[IFLA_GRE_OFLAGS])); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 608 | |
| 609 | if (data[IFLA_GRE_IKEY]) |
| 610 | parms->i_key = nla_get_be32(data[IFLA_GRE_IKEY]); |
| 611 | |
| 612 | if (data[IFLA_GRE_OKEY]) |
| 613 | parms->o_key = nla_get_be32(data[IFLA_GRE_OKEY]); |
| 614 | |
| 615 | if (data[IFLA_GRE_LOCAL]) |
Patrick McHardy | 4d74f8b | 2008-10-10 12:11:06 -0700 | [diff] [blame] | 616 | parms->iph.saddr = nla_get_be32(data[IFLA_GRE_LOCAL]); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 617 | |
| 618 | if (data[IFLA_GRE_REMOTE]) |
Patrick McHardy | 4d74f8b | 2008-10-10 12:11:06 -0700 | [diff] [blame] | 619 | parms->iph.daddr = nla_get_be32(data[IFLA_GRE_REMOTE]); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 620 | |
| 621 | if (data[IFLA_GRE_TTL]) |
| 622 | parms->iph.ttl = nla_get_u8(data[IFLA_GRE_TTL]); |
| 623 | |
| 624 | if (data[IFLA_GRE_TOS]) |
| 625 | parms->iph.tos = nla_get_u8(data[IFLA_GRE_TOS]); |
| 626 | |
| 627 | if (!data[IFLA_GRE_PMTUDISC] || nla_get_u8(data[IFLA_GRE_PMTUDISC])) |
| 628 | parms->iph.frag_off = htons(IP_DF); |
| 629 | } |
| 630 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 631 | static int gre_tap_init(struct net_device *dev) |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 632 | { |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 633 | __gre_tunnel_init(dev); |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 634 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 635 | return ip_tunnel_init(dev); |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 636 | } |
| 637 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 638 | static const struct net_device_ops gre_tap_netdev_ops = { |
| 639 | .ndo_init = gre_tap_init, |
| 640 | .ndo_uninit = ip_tunnel_uninit, |
| 641 | .ndo_start_xmit = gre_tap_xmit, |
Stephen Hemminger | b8c26a3 | 2008-11-20 20:34:29 -0800 | [diff] [blame] | 642 | .ndo_set_mac_address = eth_mac_addr, |
| 643 | .ndo_validate_addr = eth_validate_addr, |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 644 | .ndo_change_mtu = ip_tunnel_change_mtu, |
| 645 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
Stephen Hemminger | b8c26a3 | 2008-11-20 20:34:29 -0800 | [diff] [blame] | 646 | }; |
| 647 | |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 648 | static void ipgre_tap_setup(struct net_device *dev) |
| 649 | { |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 650 | ether_setup(dev); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 651 | dev->netdev_ops = &gre_tap_netdev_ops; |
| 652 | ip_tunnel_setup(dev, gre_tap_net_id); |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 653 | } |
| 654 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 655 | static int ipgre_newlink(struct net *src_net, struct net_device *dev, |
| 656 | struct nlattr *tb[], struct nlattr *data[]) |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 657 | { |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 658 | struct ip_tunnel_parm p; |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 659 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 660 | ipgre_netlink_parms(data, tb, &p); |
| 661 | return ip_tunnel_newlink(dev, tb, &p); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | static int ipgre_changelink(struct net_device *dev, struct nlattr *tb[], |
| 665 | struct nlattr *data[]) |
| 666 | { |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 667 | struct ip_tunnel_parm p; |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 668 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 669 | ipgre_netlink_parms(data, tb, &p); |
| 670 | return ip_tunnel_changelink(dev, tb, &p); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | static size_t ipgre_get_size(const struct net_device *dev) |
| 674 | { |
| 675 | return |
| 676 | /* IFLA_GRE_LINK */ |
| 677 | nla_total_size(4) + |
| 678 | /* IFLA_GRE_IFLAGS */ |
| 679 | nla_total_size(2) + |
| 680 | /* IFLA_GRE_OFLAGS */ |
| 681 | nla_total_size(2) + |
| 682 | /* IFLA_GRE_IKEY */ |
| 683 | nla_total_size(4) + |
| 684 | /* IFLA_GRE_OKEY */ |
| 685 | nla_total_size(4) + |
| 686 | /* IFLA_GRE_LOCAL */ |
| 687 | nla_total_size(4) + |
| 688 | /* IFLA_GRE_REMOTE */ |
| 689 | nla_total_size(4) + |
| 690 | /* IFLA_GRE_TTL */ |
| 691 | nla_total_size(1) + |
| 692 | /* IFLA_GRE_TOS */ |
| 693 | nla_total_size(1) + |
| 694 | /* IFLA_GRE_PMTUDISC */ |
| 695 | nla_total_size(1) + |
| 696 | 0; |
| 697 | } |
| 698 | |
| 699 | static int ipgre_fill_info(struct sk_buff *skb, const struct net_device *dev) |
| 700 | { |
| 701 | struct ip_tunnel *t = netdev_priv(dev); |
| 702 | struct ip_tunnel_parm *p = &t->parms; |
| 703 | |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 704 | if (nla_put_u32(skb, IFLA_GRE_LINK, p->link) || |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 705 | nla_put_be16(skb, IFLA_GRE_IFLAGS, tnl_flags_to_gre_flags(p->i_flags)) || |
| 706 | nla_put_be16(skb, IFLA_GRE_OFLAGS, tnl_flags_to_gre_flags(p->o_flags)) || |
David S. Miller | f3756b7 | 2012-04-01 20:39:02 -0400 | [diff] [blame] | 707 | nla_put_be32(skb, IFLA_GRE_IKEY, p->i_key) || |
| 708 | nla_put_be32(skb, IFLA_GRE_OKEY, p->o_key) || |
| 709 | nla_put_be32(skb, IFLA_GRE_LOCAL, p->iph.saddr) || |
| 710 | nla_put_be32(skb, IFLA_GRE_REMOTE, p->iph.daddr) || |
| 711 | nla_put_u8(skb, IFLA_GRE_TTL, p->iph.ttl) || |
| 712 | nla_put_u8(skb, IFLA_GRE_TOS, p->iph.tos) || |
| 713 | nla_put_u8(skb, IFLA_GRE_PMTUDISC, |
| 714 | !!(p->iph.frag_off & htons(IP_DF)))) |
| 715 | goto nla_put_failure; |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 716 | return 0; |
| 717 | |
| 718 | nla_put_failure: |
| 719 | return -EMSGSIZE; |
| 720 | } |
| 721 | |
| 722 | static const struct nla_policy ipgre_policy[IFLA_GRE_MAX + 1] = { |
| 723 | [IFLA_GRE_LINK] = { .type = NLA_U32 }, |
| 724 | [IFLA_GRE_IFLAGS] = { .type = NLA_U16 }, |
| 725 | [IFLA_GRE_OFLAGS] = { .type = NLA_U16 }, |
| 726 | [IFLA_GRE_IKEY] = { .type = NLA_U32 }, |
| 727 | [IFLA_GRE_OKEY] = { .type = NLA_U32 }, |
Patrick McHardy | 4d74f8b | 2008-10-10 12:11:06 -0700 | [diff] [blame] | 728 | [IFLA_GRE_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, |
| 729 | [IFLA_GRE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 730 | [IFLA_GRE_TTL] = { .type = NLA_U8 }, |
| 731 | [IFLA_GRE_TOS] = { .type = NLA_U8 }, |
| 732 | [IFLA_GRE_PMTUDISC] = { .type = NLA_U8 }, |
| 733 | }; |
| 734 | |
| 735 | static struct rtnl_link_ops ipgre_link_ops __read_mostly = { |
| 736 | .kind = "gre", |
| 737 | .maxtype = IFLA_GRE_MAX, |
| 738 | .policy = ipgre_policy, |
| 739 | .priv_size = sizeof(struct ip_tunnel), |
| 740 | .setup = ipgre_tunnel_setup, |
| 741 | .validate = ipgre_tunnel_validate, |
| 742 | .newlink = ipgre_newlink, |
| 743 | .changelink = ipgre_changelink, |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 744 | .dellink = ip_tunnel_dellink, |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 745 | .get_size = ipgre_get_size, |
| 746 | .fill_info = ipgre_fill_info, |
| 747 | }; |
| 748 | |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 749 | static struct rtnl_link_ops ipgre_tap_ops __read_mostly = { |
| 750 | .kind = "gretap", |
| 751 | .maxtype = IFLA_GRE_MAX, |
| 752 | .policy = ipgre_policy, |
| 753 | .priv_size = sizeof(struct ip_tunnel), |
| 754 | .setup = ipgre_tap_setup, |
| 755 | .validate = ipgre_tap_validate, |
| 756 | .newlink = ipgre_newlink, |
| 757 | .changelink = ipgre_changelink, |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 758 | .dellink = ip_tunnel_dellink, |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 759 | .get_size = ipgre_get_size, |
| 760 | .fill_info = ipgre_fill_info, |
| 761 | }; |
| 762 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 763 | static int __net_init ipgre_tap_init_net(struct net *net) |
| 764 | { |
| 765 | return ip_tunnel_init_net(net, gre_tap_net_id, &ipgre_tap_ops, NULL); |
| 766 | } |
| 767 | |
| 768 | static void __net_exit ipgre_tap_exit_net(struct net *net) |
| 769 | { |
| 770 | struct ip_tunnel_net *itn = net_generic(net, gre_tap_net_id); |
Nicolas Dichtel | 6c742e7 | 2013-08-13 17:51:11 +0200 | [diff] [blame] | 771 | ip_tunnel_delete_net(itn, &ipgre_tap_ops); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | static struct pernet_operations ipgre_tap_net_ops = { |
| 775 | .init = ipgre_tap_init_net, |
| 776 | .exit = ipgre_tap_exit_net, |
| 777 | .id = &gre_tap_net_id, |
| 778 | .size = sizeof(struct ip_tunnel_net), |
| 779 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
| 781 | static int __init ipgre_init(void) |
| 782 | { |
| 783 | int err; |
| 784 | |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 785 | pr_info("GRE over IPv4 tunneling driver\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | |
Eric W. Biederman | cfb8fbf | 2009-11-29 15:46:13 +0000 | [diff] [blame] | 787 | err = register_pernet_device(&ipgre_net_ops); |
Pavel Emelyanov | 59a4c75 | 2008-04-16 01:08:53 -0700 | [diff] [blame] | 788 | if (err < 0) |
Alexey Dobriyan | c2892f0 | 2010-02-16 07:57:44 +0000 | [diff] [blame] | 789 | return err; |
| 790 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 791 | err = register_pernet_device(&ipgre_tap_net_ops); |
| 792 | if (err < 0) |
| 793 | goto pnet_tap_faied; |
| 794 | |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 795 | err = gre_cisco_register(&ipgre_protocol); |
Alexey Dobriyan | c2892f0 | 2010-02-16 07:57:44 +0000 | [diff] [blame] | 796 | if (err < 0) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 797 | pr_info("%s: can't add protocol\n", __func__); |
Alexey Dobriyan | c2892f0 | 2010-02-16 07:57:44 +0000 | [diff] [blame] | 798 | goto add_proto_failed; |
| 799 | } |
Pavel Emelyanov | 7daa000 | 2008-04-16 01:10:05 -0700 | [diff] [blame] | 800 | |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 801 | err = rtnl_link_register(&ipgre_link_ops); |
| 802 | if (err < 0) |
| 803 | goto rtnl_link_failed; |
| 804 | |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 805 | err = rtnl_link_register(&ipgre_tap_ops); |
| 806 | if (err < 0) |
| 807 | goto tap_ops_failed; |
| 808 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 809 | return 0; |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 810 | |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 811 | tap_ops_failed: |
| 812 | rtnl_link_unregister(&ipgre_link_ops); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 813 | rtnl_link_failed: |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 814 | gre_cisco_unregister(&ipgre_protocol); |
Alexey Dobriyan | c2892f0 | 2010-02-16 07:57:44 +0000 | [diff] [blame] | 815 | add_proto_failed: |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 816 | unregister_pernet_device(&ipgre_tap_net_ops); |
| 817 | pnet_tap_faied: |
Alexey Dobriyan | c2892f0 | 2010-02-16 07:57:44 +0000 | [diff] [blame] | 818 | unregister_pernet_device(&ipgre_net_ops); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 819 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | } |
| 821 | |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 822 | static void __exit ipgre_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | { |
Herbert Xu | e1a8000 | 2008-10-09 12:00:17 -0700 | [diff] [blame] | 824 | rtnl_link_unregister(&ipgre_tap_ops); |
Herbert Xu | c19e654 | 2008-10-09 11:59:55 -0700 | [diff] [blame] | 825 | rtnl_link_unregister(&ipgre_link_ops); |
Pravin B Shelar | bda7bb4 | 2013-06-17 17:49:38 -0700 | [diff] [blame] | 826 | gre_cisco_unregister(&ipgre_protocol); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 827 | unregister_pernet_device(&ipgre_tap_net_ops); |
Alexey Dobriyan | c2892f0 | 2010-02-16 07:57:44 +0000 | [diff] [blame] | 828 | unregister_pernet_device(&ipgre_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | module_init(ipgre_init); |
| 832 | module_exit(ipgre_fini); |
| 833 | MODULE_LICENSE("GPL"); |
Patrick McHardy | 4d74f8b | 2008-10-10 12:11:06 -0700 | [diff] [blame] | 834 | MODULE_ALIAS_RTNL_LINK("gre"); |
| 835 | MODULE_ALIAS_RTNL_LINK("gretap"); |
Vasiliy Kulikov | 8909c9a | 2011-03-02 00:33:13 +0300 | [diff] [blame] | 836 | MODULE_ALIAS_NETDEV("gre0"); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 837 | MODULE_ALIAS_NETDEV("gretap0"); |