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: IP/IP protocol decoder. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Authors: |
| 5 | * Sam Lantinga (slouken@cs.ucdavis.edu) 02/01/95 |
| 6 | * |
| 7 | * Fixes: |
| 8 | * Alan Cox : Merged and made usable non modular (its so tiny its silly as |
| 9 | * a module taking up 2 pages). |
| 10 | * Alan Cox : Fixed bug with 1.3.18 and IPIP not working (now needs to set skb->h.iph) |
| 11 | * to keep ip_forward happy. |
| 12 | * Alan Cox : More fixes for 1.3.21, and firewall fix. Maybe this will work soon 8). |
| 13 | * Kai Schulte : Fixed #defines for IP_FIREWALL->FIREWALL |
| 14 | * David Woodhouse : Perform some basic ICMP handling. |
| 15 | * IPIP Routing without decapsulation. |
| 16 | * Carlos Picoto : GRE over IP support |
| 17 | * Alexey Kuznetsov: Reworked. Really, now it is truncated version of ipv4/ip_gre.c. |
| 18 | * I do not want to merge them together. |
| 19 | * |
| 20 | * This program is free software; you can redistribute it and/or |
| 21 | * modify it under the terms of the GNU General Public License |
| 22 | * as published by the Free Software Foundation; either version |
| 23 | * 2 of the License, or (at your option) any later version. |
| 24 | * |
| 25 | */ |
| 26 | |
| 27 | /* tunnel.c: an IP tunnel driver |
| 28 | |
| 29 | The purpose of this driver is to provide an IP tunnel through |
| 30 | which you can tunnel network traffic transparently across subnets. |
| 31 | |
| 32 | This was written by looking at Nick Holloway's dummy driver |
| 33 | Thanks for the great code! |
| 34 | |
| 35 | -Sam Lantinga (slouken@cs.ucdavis.edu) 02/01/95 |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | Minor tweaks: |
| 38 | Cleaned up the code a little and added some pre-1.3.0 tweaks. |
| 39 | dev->hard_header/hard_header_len changed to use no headers. |
| 40 | Comments/bracketing tweaked. |
| 41 | Made the tunnels use dev->name not tunnel: when error reporting. |
| 42 | Added tx_dropped stat |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 43 | |
Alan Cox | 113aa83 | 2008-10-13 19:01:08 -0700 | [diff] [blame] | 44 | -Alan Cox (alan@lxorguk.ukuu.org.uk) 21 March 95 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | Reworked: |
| 47 | Changed to tunnel to destination gateway in addition to the |
| 48 | tunnel's pointopoint address |
| 49 | Almost completely rewritten |
| 50 | Note: There is currently no firewall or ICMP handling done. |
| 51 | |
| 52 | -Sam Lantinga (slouken@cs.ucdavis.edu) 02/13/96 |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | */ |
| 55 | |
| 56 | /* Things I wish I had known when writing the tunnel driver: |
| 57 | |
| 58 | When the tunnel_xmit() function is called, the skb contains the |
| 59 | packet to be sent (plus a great deal of extra info), and dev |
| 60 | contains the tunnel device that _we_ are. |
| 61 | |
| 62 | When we are passed a packet, we are expected to fill in the |
| 63 | source address with our source IP address. |
| 64 | |
| 65 | What is the proper way to allocate, copy and free a buffer? |
| 66 | After you allocate it, it is a "0 length" chunk of memory |
| 67 | starting at zero. If you want to add headers to the buffer |
| 68 | later, you'll have to call "skb_reserve(skb, amount)" with |
| 69 | the amount of memory you want reserved. Then, you call |
| 70 | "skb_put(skb, amount)" with the amount of space you want in |
| 71 | the buffer. skb_put() returns a pointer to the top (#0) of |
| 72 | that buffer. skb->len is set to the amount of space you have |
| 73 | "allocated" with skb_put(). You can then write up to skb->len |
| 74 | bytes to that buffer. If you need more, you can call skb_put() |
| 75 | again with the additional amount of space you need. You can |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 76 | find out how much more space you can allocate by calling |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | "skb_tailroom(skb)". |
| 78 | Now, to add header space, call "skb_push(skb, header_len)". |
| 79 | This creates space at the beginning of the buffer and returns |
| 80 | a pointer to this new space. If later you need to strip a |
| 81 | header from a buffer, call "skb_pull(skb, header_len)". |
| 82 | skb_headroom() will return how much space is left at the top |
| 83 | of the buffer (before the main data). Remember, this headroom |
| 84 | space must be reserved before the skb_put() function is called. |
| 85 | */ |
| 86 | |
| 87 | /* |
| 88 | This version of net/ipv4/ipip.c is cloned of net/ipv4/ip_gre.c |
| 89 | |
| 90 | For comments look at net/ipv4/ip_gre.c --ANK |
| 91 | */ |
| 92 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 93 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 94 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #include <linux/module.h> |
| 96 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 98 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | #include <asm/uaccess.h> |
| 100 | #include <linux/skbuff.h> |
| 101 | #include <linux/netdevice.h> |
| 102 | #include <linux/in.h> |
| 103 | #include <linux/tcp.h> |
| 104 | #include <linux/udp.h> |
| 105 | #include <linux/if_arp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #include <linux/init.h> |
| 107 | #include <linux/netfilter_ipv4.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 108 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
| 110 | #include <net/sock.h> |
| 111 | #include <net/ip.h> |
| 112 | #include <net/icmp.h> |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 113 | #include <net/ip_tunnels.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | #include <net/inet_ecn.h> |
| 115 | #include <net/xfrm.h> |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 116 | #include <net/net_namespace.h> |
| 117 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
stephen hemminger | eccc1bb | 2012-09-25 11:02:48 +0000 | [diff] [blame] | 119 | static bool log_ecn_error = true; |
| 120 | module_param(log_ecn_error, bool, 0644); |
| 121 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); |
| 122 | |
Eric Dumazet | f99189b | 2009-11-17 10:42:49 +0000 | [diff] [blame] | 123 | static int ipip_net_id __read_mostly; |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 124 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 125 | static int ipip_tunnel_init(struct net_device *dev); |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 126 | static struct rtnl_link_ops ipip_link_ops __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 128 | static int ipip_err(struct sk_buff *skb, u32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Rami Rosen | 071f92d | 2008-05-21 17:47:54 -0700 | [diff] [blame] | 131 | /* All the routers (except for Linux) return only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | 8 bytes of packet payload. It means, that precise relaying of |
| 133 | ICMP in the real Internet is absolutely infeasible. |
| 134 | */ |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 135 | struct net *net = dev_net(skb->dev); |
| 136 | struct ip_tunnel_net *itn = net_generic(net, ipip_net_id); |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 137 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | struct ip_tunnel *t; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 139 | int err; |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 140 | const int type = icmp_hdr(skb)->type; |
| 141 | const int code = icmp_hdr(skb)->code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 143 | err = -ENOENT; |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 144 | t = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, |
| 145 | iph->daddr, iph->saddr, 0); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 146 | if (!t) |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 147 | goto out; |
| 148 | |
| 149 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) { |
| 150 | ipv4_update_pmtu(skb, dev_net(skb->dev), info, |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 151 | t->parms.link, 0, iph->protocol, 0); |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 152 | err = 0; |
| 153 | goto out; |
| 154 | } |
| 155 | |
David S. Miller | 55be7a9 | 2012-07-11 21:27:49 -0700 | [diff] [blame] | 156 | if (type == ICMP_REDIRECT) { |
Dmitry Popov | 2346829 | 2014-06-06 23:19:21 +0400 | [diff] [blame] | 157 | ipv4_redirect(skb, dev_net(skb->dev), t->parms.link, 0, |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 158 | iph->protocol, 0); |
David S. Miller | 55be7a9 | 2012-07-11 21:27:49 -0700 | [diff] [blame] | 159 | err = 0; |
| 160 | goto out; |
| 161 | } |
| 162 | |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 163 | if (t->parms.iph.daddr == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | goto out; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 165 | |
| 166 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
| 168 | goto out; |
| 169 | |
Wei Yongjun | 26d94b4 | 2009-02-24 23:36:47 -0800 | [diff] [blame] | 170 | if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | t->err_count++; |
| 172 | else |
| 173 | t->err_count = 1; |
| 174 | t->err_time = jiffies; |
stephen hemminger | b0558ef | 2012-09-24 18:12:25 +0000 | [diff] [blame] | 175 | |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 176 | out: |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 177 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 180 | static const struct tnl_ptk_info ipip_tpi = { |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 181 | /* no tunnel info required for ipip. */ |
| 182 | .proto = htons(ETH_P_IP), |
| 183 | }; |
| 184 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 185 | #if IS_ENABLED(CONFIG_MPLS) |
| 186 | static const struct tnl_ptk_info mplsip_tpi = { |
| 187 | /* no tunnel info required for mplsip. */ |
| 188 | .proto = htons(ETH_P_MPLS_UC), |
| 189 | }; |
| 190 | #endif |
| 191 | |
| 192 | static int ipip_tunnel_rcv(struct sk_buff *skb, u8 ipproto) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | { |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 194 | struct net *net = dev_net(skb->dev); |
| 195 | struct ip_tunnel_net *itn = net_generic(net, ipip_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | struct ip_tunnel *tunnel; |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 197 | const struct iphdr *iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 199 | iph = ip_hdr(skb); |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 200 | tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, |
| 201 | iph->saddr, iph->daddr, 0); |
| 202 | if (tunnel) { |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 203 | const struct tnl_ptk_info *tpi; |
| 204 | |
| 205 | if (tunnel->parms.iph.protocol != ipproto && |
| 206 | tunnel->parms.iph.protocol != 0) |
| 207 | goto drop; |
| 208 | |
stephen hemminger | eccc1bb | 2012-09-25 11:02:48 +0000 | [diff] [blame] | 209 | if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) |
| 210 | goto drop; |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 211 | #if IS_ENABLED(CONFIG_MPLS) |
| 212 | if (ipproto == IPPROTO_MPLS) |
| 213 | tpi = &mplsip_tpi; |
| 214 | else |
| 215 | #endif |
| 216 | tpi = &ipip_tpi; |
| 217 | if (iptunnel_pull_header(skb, 0, tpi->proto, false)) |
Li Hongjun | 737e828 | 2013-08-28 11:54:50 +0200 | [diff] [blame] | 218 | goto drop; |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 219 | return ip_tunnel_rcv(tunnel, skb, tpi, NULL, log_ecn_error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | return -1; |
stephen hemminger | eccc1bb | 2012-09-25 11:02:48 +0000 | [diff] [blame] | 223 | |
| 224 | drop: |
| 225 | kfree_skb(skb); |
| 226 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | } |
| 228 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 229 | static int ipip_rcv(struct sk_buff *skb) |
| 230 | { |
| 231 | return ipip_tunnel_rcv(skb, IPPROTO_IPIP); |
| 232 | } |
| 233 | |
| 234 | #if IS_ENABLED(CONFIG_MPLS) |
| 235 | static int mplsip_rcv(struct sk_buff *skb) |
| 236 | { |
| 237 | return ipip_tunnel_rcv(skb, IPPROTO_MPLS); |
| 238 | } |
| 239 | #endif |
| 240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | /* |
| 242 | * This function assumes it is being called from dev_queue_xmit() |
| 243 | * and that skb is filled properly by that function. |
| 244 | */ |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 245 | static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, |
| 246 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 248 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 249 | const struct iphdr *tiph = &tunnel->parms.iph; |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 250 | u8 ipproto; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 252 | switch (skb->protocol) { |
| 253 | case htons(ETH_P_IP): |
| 254 | ipproto = IPPROTO_IPIP; |
| 255 | break; |
| 256 | #if IS_ENABLED(CONFIG_MPLS) |
| 257 | case htons(ETH_P_MPLS_UC): |
| 258 | ipproto = IPPROTO_MPLS; |
| 259 | break; |
| 260 | #endif |
| 261 | default: |
| 262 | goto tx_error; |
| 263 | } |
| 264 | |
| 265 | if (tiph->protocol != ipproto && tiph->protocol != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | goto tx_error; |
Eric Dumazet | cef401d | 2013-01-25 20:34:37 +0000 | [diff] [blame] | 267 | |
Tom Herbert | 7e13318 | 2016-05-18 09:06:10 -0700 | [diff] [blame] | 268 | if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP4)) |
Alexander Duyck | aed069d | 2016-04-14 15:33:37 -0400 | [diff] [blame] | 269 | goto tx_error; |
Pravin B Shelar | 4f3ed92 | 2013-03-08 15:12:52 +0000 | [diff] [blame] | 270 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 271 | skb_set_inner_ipproto(skb, ipproto); |
Tom Herbert | 077c5a0 | 2014-09-29 20:22:31 -0700 | [diff] [blame] | 272 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 273 | ip_tunnel_xmit(skb, dev, tiph, ipproto); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 274 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | tx_error: |
Eric Dumazet | 3acfa1e | 2014-01-18 18:27:49 -0800 | [diff] [blame] | 277 | kfree_skb(skb); |
Alexander Duyck | aed069d | 2016-04-14 15:33:37 -0400 | [diff] [blame] | 278 | |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 279 | dev->stats.tx_errors++; |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 280 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 283 | static bool ipip_tunnel_ioctl_verify_protocol(u8 ipproto) |
| 284 | { |
| 285 | switch (ipproto) { |
| 286 | case 0: |
| 287 | case IPPROTO_IPIP: |
| 288 | #if IS_ENABLED(CONFIG_MPLS) |
| 289 | case IPPROTO_MPLS: |
| 290 | #endif |
| 291 | return true; |
| 292 | } |
| 293 | |
| 294 | return false; |
| 295 | } |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | static int |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 298 | ipip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | { |
| 300 | int err = 0; |
| 301 | struct ip_tunnel_parm p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 303 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 304 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Cong Wang | 3b7b514 | 2013-07-02 14:49:34 +0800 | [diff] [blame] | 306 | if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) { |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 307 | if (p.iph.version != 4 || |
| 308 | !ipip_tunnel_ioctl_verify_protocol(p.iph.protocol) || |
Cong Wang | 3b7b514 | 2013-07-02 14:49:34 +0800 | [diff] [blame] | 309 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) |
| 310 | return -EINVAL; |
| 311 | } |
| 312 | |
Eric Dumazet | 252a8fb | 2015-05-15 08:58:45 -0700 | [diff] [blame] | 313 | p.i_key = p.o_key = 0; |
| 314 | p.i_flags = p.o_flags = 0; |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 315 | err = ip_tunnel_ioctl(dev, &p, cmd); |
| 316 | if (err) |
| 317 | return err; |
| 318 | |
| 319 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
| 320 | return -EFAULT; |
| 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | return 0; |
| 323 | } |
| 324 | |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 325 | static const struct net_device_ops ipip_netdev_ops = { |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 326 | .ndo_init = ipip_tunnel_init, |
| 327 | .ndo_uninit = ip_tunnel_uninit, |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 328 | .ndo_start_xmit = ipip_tunnel_xmit, |
| 329 | .ndo_do_ioctl = ipip_tunnel_ioctl, |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 330 | .ndo_change_mtu = ip_tunnel_change_mtu, |
| 331 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
Nicolas Dichtel | 1e99584 | 2015-04-02 17:07:02 +0200 | [diff] [blame] | 332 | .ndo_get_iflink = ip_tunnel_get_iflink, |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 333 | }; |
| 334 | |
Eric Dumazet | c3b89fb | 2012-11-08 09:59:52 +0000 | [diff] [blame] | 335 | #define IPIP_FEATURES (NETIF_F_SG | \ |
| 336 | NETIF_F_FRAGLIST | \ |
| 337 | NETIF_F_HIGHDMA | \ |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 338 | NETIF_F_GSO_SOFTWARE | \ |
Eric Dumazet | c3b89fb | 2012-11-08 09:59:52 +0000 | [diff] [blame] | 339 | NETIF_F_HW_CSUM) |
| 340 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | static void ipip_tunnel_setup(struct net_device *dev) |
| 342 | { |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 343 | dev->netdev_ops = &ipip_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
| 345 | dev->type = ARPHRD_TUNNEL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | dev->flags = IFF_NOARP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | dev->addr_len = 4; |
Eric Dumazet | 153f094 | 2010-09-28 00:17:17 +0000 | [diff] [blame] | 348 | dev->features |= NETIF_F_LLTX; |
Eric Dumazet | 0287587 | 2014-10-05 18:38:35 -0700 | [diff] [blame] | 349 | netif_keep_dst(dev); |
Eric Dumazet | c3b89fb | 2012-11-08 09:59:52 +0000 | [diff] [blame] | 350 | |
| 351 | dev->features |= IPIP_FEATURES; |
| 352 | dev->hw_features |= IPIP_FEATURES; |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 353 | ip_tunnel_setup(dev, ipip_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Eric Dumazet | 3c97af9 | 2010-09-27 00:35:50 +0000 | [diff] [blame] | 356 | static int ipip_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
Stephen Hemminger | 23a12b1 | 2008-11-20 20:33:21 -0800 | [diff] [blame] | 358 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); |
| 361 | memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); |
| 362 | |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 363 | tunnel->tun_hlen = 0; |
| 364 | tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen; |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 365 | return ip_tunnel_init(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 368 | static int ipip_tunnel_validate(struct nlattr *tb[], struct nlattr *data[]) |
| 369 | { |
| 370 | u8 proto; |
| 371 | |
| 372 | if (!data || !data[IFLA_IPTUN_PROTO]) |
| 373 | return 0; |
| 374 | |
| 375 | proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); |
| 376 | if (proto != IPPROTO_IPIP && proto != IPPROTO_MPLS && proto != 0) |
| 377 | return -EINVAL; |
| 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 382 | static void ipip_netlink_parms(struct nlattr *data[], |
| 383 | struct ip_tunnel_parm *parms) |
| 384 | { |
| 385 | memset(parms, 0, sizeof(*parms)); |
| 386 | |
| 387 | parms->iph.version = 4; |
| 388 | parms->iph.protocol = IPPROTO_IPIP; |
| 389 | parms->iph.ihl = 5; |
| 390 | |
| 391 | if (!data) |
| 392 | return; |
| 393 | |
| 394 | if (data[IFLA_IPTUN_LINK]) |
| 395 | parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]); |
| 396 | |
| 397 | if (data[IFLA_IPTUN_LOCAL]) |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 398 | parms->iph.saddr = nla_get_in_addr(data[IFLA_IPTUN_LOCAL]); |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 399 | |
| 400 | if (data[IFLA_IPTUN_REMOTE]) |
Jiri Benc | 67b61f6 | 2015-03-29 16:59:26 +0200 | [diff] [blame] | 401 | parms->iph.daddr = nla_get_in_addr(data[IFLA_IPTUN_REMOTE]); |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 402 | |
| 403 | if (data[IFLA_IPTUN_TTL]) { |
| 404 | parms->iph.ttl = nla_get_u8(data[IFLA_IPTUN_TTL]); |
| 405 | if (parms->iph.ttl) |
| 406 | parms->iph.frag_off = htons(IP_DF); |
| 407 | } |
| 408 | |
| 409 | if (data[IFLA_IPTUN_TOS]) |
| 410 | parms->iph.tos = nla_get_u8(data[IFLA_IPTUN_TOS]); |
| 411 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 412 | if (data[IFLA_IPTUN_PROTO]) |
| 413 | parms->iph.protocol = nla_get_u8(data[IFLA_IPTUN_PROTO]); |
| 414 | |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 415 | if (!data[IFLA_IPTUN_PMTUDISC] || nla_get_u8(data[IFLA_IPTUN_PMTUDISC])) |
| 416 | parms->iph.frag_off = htons(IP_DF); |
| 417 | } |
| 418 | |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 419 | /* This function returns true when ENCAP attributes are present in the nl msg */ |
| 420 | static bool ipip_netlink_encap_parms(struct nlattr *data[], |
| 421 | struct ip_tunnel_encap *ipencap) |
| 422 | { |
| 423 | bool ret = false; |
| 424 | |
| 425 | memset(ipencap, 0, sizeof(*ipencap)); |
| 426 | |
| 427 | if (!data) |
| 428 | return ret; |
| 429 | |
| 430 | if (data[IFLA_IPTUN_ENCAP_TYPE]) { |
| 431 | ret = true; |
| 432 | ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]); |
| 433 | } |
| 434 | |
| 435 | if (data[IFLA_IPTUN_ENCAP_FLAGS]) { |
| 436 | ret = true; |
| 437 | ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]); |
| 438 | } |
| 439 | |
| 440 | if (data[IFLA_IPTUN_ENCAP_SPORT]) { |
| 441 | ret = true; |
Sabrina Dubroca | 3e97fa7 | 2015-02-06 17:22:22 +0100 | [diff] [blame] | 442 | ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]); |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | if (data[IFLA_IPTUN_ENCAP_DPORT]) { |
| 446 | ret = true; |
Sabrina Dubroca | 3e97fa7 | 2015-02-06 17:22:22 +0100 | [diff] [blame] | 447 | ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]); |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | return ret; |
| 451 | } |
| 452 | |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 453 | static int ipip_newlink(struct net *src_net, struct net_device *dev, |
| 454 | struct nlattr *tb[], struct nlattr *data[]) |
| 455 | { |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 456 | struct ip_tunnel_parm p; |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 457 | struct ip_tunnel_encap ipencap; |
| 458 | |
| 459 | if (ipip_netlink_encap_parms(data, &ipencap)) { |
| 460 | struct ip_tunnel *t = netdev_priv(dev); |
| 461 | int err = ip_tunnel_encap_setup(t, &ipencap); |
| 462 | |
| 463 | if (err < 0) |
| 464 | return err; |
| 465 | } |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 466 | |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 467 | ipip_netlink_parms(data, &p); |
| 468 | return ip_tunnel_newlink(dev, tb, &p); |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | static int ipip_changelink(struct net_device *dev, struct nlattr *tb[], |
| 472 | struct nlattr *data[]) |
| 473 | { |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 474 | struct ip_tunnel_parm p; |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 475 | struct ip_tunnel_encap ipencap; |
| 476 | |
| 477 | if (ipip_netlink_encap_parms(data, &ipencap)) { |
| 478 | struct ip_tunnel *t = netdev_priv(dev); |
| 479 | int err = ip_tunnel_encap_setup(t, &ipencap); |
| 480 | |
| 481 | if (err < 0) |
| 482 | return err; |
| 483 | } |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 484 | |
| 485 | ipip_netlink_parms(data, &p); |
| 486 | |
| 487 | if (((dev->flags & IFF_POINTOPOINT) && !p.iph.daddr) || |
| 488 | (!(dev->flags & IFF_POINTOPOINT) && p.iph.daddr)) |
| 489 | return -EINVAL; |
| 490 | |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 491 | return ip_tunnel_changelink(dev, tb, &p); |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 492 | } |
| 493 | |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 494 | static size_t ipip_get_size(const struct net_device *dev) |
| 495 | { |
| 496 | return |
| 497 | /* IFLA_IPTUN_LINK */ |
| 498 | nla_total_size(4) + |
| 499 | /* IFLA_IPTUN_LOCAL */ |
| 500 | nla_total_size(4) + |
| 501 | /* IFLA_IPTUN_REMOTE */ |
| 502 | nla_total_size(4) + |
| 503 | /* IFLA_IPTUN_TTL */ |
| 504 | nla_total_size(1) + |
| 505 | /* IFLA_IPTUN_TOS */ |
| 506 | nla_total_size(1) + |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 507 | /* IFLA_IPTUN_PROTO */ |
| 508 | nla_total_size(1) + |
Nicolas Dichtel | befe2aa | 2012-11-14 05:14:02 +0000 | [diff] [blame] | 509 | /* IFLA_IPTUN_PMTUDISC */ |
| 510 | nla_total_size(1) + |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 511 | /* IFLA_IPTUN_ENCAP_TYPE */ |
| 512 | nla_total_size(2) + |
| 513 | /* IFLA_IPTUN_ENCAP_FLAGS */ |
| 514 | nla_total_size(2) + |
| 515 | /* IFLA_IPTUN_ENCAP_SPORT */ |
| 516 | nla_total_size(2) + |
| 517 | /* IFLA_IPTUN_ENCAP_DPORT */ |
| 518 | nla_total_size(2) + |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 519 | 0; |
| 520 | } |
| 521 | |
| 522 | static int ipip_fill_info(struct sk_buff *skb, const struct net_device *dev) |
| 523 | { |
| 524 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 525 | struct ip_tunnel_parm *parm = &tunnel->parms; |
| 526 | |
| 527 | if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) || |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 528 | nla_put_in_addr(skb, IFLA_IPTUN_LOCAL, parm->iph.saddr) || |
| 529 | nla_put_in_addr(skb, IFLA_IPTUN_REMOTE, parm->iph.daddr) || |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 530 | nla_put_u8(skb, IFLA_IPTUN_TTL, parm->iph.ttl) || |
Nicolas Dichtel | befe2aa | 2012-11-14 05:14:02 +0000 | [diff] [blame] | 531 | nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos) || |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 532 | nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->iph.protocol) || |
Nicolas Dichtel | befe2aa | 2012-11-14 05:14:02 +0000 | [diff] [blame] | 533 | nla_put_u8(skb, IFLA_IPTUN_PMTUDISC, |
| 534 | !!(parm->iph.frag_off & htons(IP_DF)))) |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 535 | goto nla_put_failure; |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 536 | |
| 537 | if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE, |
| 538 | tunnel->encap.type) || |
Sabrina Dubroca | 3e97fa7 | 2015-02-06 17:22:22 +0100 | [diff] [blame] | 539 | nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT, |
| 540 | tunnel->encap.sport) || |
| 541 | nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT, |
| 542 | tunnel->encap.dport) || |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 543 | nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS, |
Tom Herbert | e1b2cb6 | 2014-11-05 16:49:38 -0800 | [diff] [blame] | 544 | tunnel->encap.flags)) |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 545 | goto nla_put_failure; |
| 546 | |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 547 | return 0; |
| 548 | |
| 549 | nla_put_failure: |
| 550 | return -EMSGSIZE; |
| 551 | } |
| 552 | |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 553 | static const struct nla_policy ipip_policy[IFLA_IPTUN_MAX + 1] = { |
| 554 | [IFLA_IPTUN_LINK] = { .type = NLA_U32 }, |
| 555 | [IFLA_IPTUN_LOCAL] = { .type = NLA_U32 }, |
| 556 | [IFLA_IPTUN_REMOTE] = { .type = NLA_U32 }, |
| 557 | [IFLA_IPTUN_TTL] = { .type = NLA_U8 }, |
| 558 | [IFLA_IPTUN_TOS] = { .type = NLA_U8 }, |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 559 | [IFLA_IPTUN_PROTO] = { .type = NLA_U8 }, |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 560 | [IFLA_IPTUN_PMTUDISC] = { .type = NLA_U8 }, |
Tom Herbert | 473ab82 | 2014-09-17 12:26:00 -0700 | [diff] [blame] | 561 | [IFLA_IPTUN_ENCAP_TYPE] = { .type = NLA_U16 }, |
| 562 | [IFLA_IPTUN_ENCAP_FLAGS] = { .type = NLA_U16 }, |
| 563 | [IFLA_IPTUN_ENCAP_SPORT] = { .type = NLA_U16 }, |
| 564 | [IFLA_IPTUN_ENCAP_DPORT] = { .type = NLA_U16 }, |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 565 | }; |
| 566 | |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 567 | static struct rtnl_link_ops ipip_link_ops __read_mostly = { |
| 568 | .kind = "ipip", |
| 569 | .maxtype = IFLA_IPTUN_MAX, |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 570 | .policy = ipip_policy, |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 571 | .priv_size = sizeof(struct ip_tunnel), |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 572 | .setup = ipip_tunnel_setup, |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 573 | .validate = ipip_tunnel_validate, |
Nicolas Dichtel | be42da0 | 2012-11-14 05:14:03 +0000 | [diff] [blame] | 574 | .newlink = ipip_newlink, |
| 575 | .changelink = ipip_changelink, |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 576 | .dellink = ip_tunnel_dellink, |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 577 | .get_size = ipip_get_size, |
| 578 | .fill_info = ipip_fill_info, |
Nicolas Dichtel | 1728d4f | 2015-01-15 15:11:17 +0100 | [diff] [blame] | 579 | .get_link_net = ip_tunnel_get_link_net, |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 580 | }; |
| 581 | |
Eric Dumazet | 6dcd814 | 2010-08-30 07:04:14 +0000 | [diff] [blame] | 582 | static struct xfrm_tunnel ipip_handler __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | .handler = ipip_rcv, |
| 584 | .err_handler = ipip_err, |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 585 | .priority = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | }; |
| 587 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 588 | #if IS_ENABLED(CONFIG_MPLS) |
| 589 | static struct xfrm_tunnel mplsip_handler __read_mostly = { |
| 590 | .handler = mplsip_rcv, |
| 591 | .err_handler = ipip_err, |
| 592 | .priority = 1, |
| 593 | }; |
| 594 | #endif |
| 595 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 596 | static int __net_init ipip_init_net(struct net *net) |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 597 | { |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 598 | return ip_tunnel_init_net(net, ipip_net_id, &ipip_link_ops, "tunl0"); |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 599 | } |
| 600 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 601 | static void __net_exit ipip_exit_net(struct net *net) |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 602 | { |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 603 | struct ip_tunnel_net *itn = net_generic(net, ipip_net_id); |
Nicolas Dichtel | 6c742e7 | 2013-08-13 17:51:11 +0200 | [diff] [blame] | 604 | ip_tunnel_delete_net(itn, &ipip_link_ops); |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 605 | } |
| 606 | |
| 607 | static struct pernet_operations ipip_net_ops = { |
| 608 | .init = ipip_init_net, |
| 609 | .exit = ipip_exit_net, |
Eric W. Biederman | 86de8a6 | 2009-11-29 15:46:14 +0000 | [diff] [blame] | 610 | .id = &ipip_net_id, |
Pravin B Shelar | fd58156 | 2013-03-25 14:49:41 +0000 | [diff] [blame] | 611 | .size = sizeof(struct ip_tunnel_net), |
Pavel Emelyanov | 10dc4c7 | 2008-04-16 01:03:13 -0700 | [diff] [blame] | 612 | }; |
| 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | static int __init ipip_init(void) |
| 615 | { |
| 616 | int err; |
| 617 | |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 618 | pr_info("ipip: IPv4 and MPLS over IPv4 tunneling driver\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
Eric W. Biederman | 86de8a6 | 2009-11-29 15:46:14 +0000 | [diff] [blame] | 620 | err = register_pernet_device(&ipip_net_ops); |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 621 | if (err < 0) |
| 622 | return err; |
| 623 | err = xfrm4_tunnel_register(&ipip_handler, AF_INET); |
| 624 | if (err < 0) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 625 | pr_info("%s: can't register tunnel\n", __func__); |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 626 | goto xfrm_tunnel_ipip_failed; |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 627 | } |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 628 | #if IS_ENABLED(CONFIG_MPLS) |
| 629 | err = xfrm4_tunnel_register(&mplsip_handler, AF_MPLS); |
| 630 | if (err < 0) { |
| 631 | pr_info("%s: can't register tunnel\n", __func__); |
| 632 | goto xfrm_tunnel_mplsip_failed; |
| 633 | } |
| 634 | #endif |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 635 | err = rtnl_link_register(&ipip_link_ops); |
| 636 | if (err < 0) |
| 637 | goto rtnl_link_failed; |
| 638 | |
| 639 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | return err; |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 641 | |
| 642 | rtnl_link_failed: |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 643 | #if IS_ENABLED(CONFIG_MPLS) |
| 644 | xfrm4_tunnel_deregister(&mplsip_handler, AF_INET); |
| 645 | xfrm_tunnel_mplsip_failed: |
| 646 | |
| 647 | #endif |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 648 | xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 649 | xfrm_tunnel_ipip_failed: |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 650 | unregister_pernet_device(&ipip_net_ops); |
| 651 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | static void __exit ipip_fini(void) |
| 655 | { |
Nicolas Dichtel | 0974658 | 2012-11-09 06:09:59 +0000 | [diff] [blame] | 656 | rtnl_link_unregister(&ipip_link_ops); |
Kazunori MIYAZAWA | c0d5640 | 2007-02-13 12:54:47 -0800 | [diff] [blame] | 657 | if (xfrm4_tunnel_deregister(&ipip_handler, AF_INET)) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 658 | pr_info("%s: can't deregister tunnel\n", __func__); |
Simon Horman | 1b69e7e | 2016-07-07 07:56:14 +0200 | [diff] [blame] | 659 | #if IS_ENABLED(CONFIG_MPLS) |
| 660 | if (xfrm4_tunnel_deregister(&mplsip_handler, AF_MPLS)) |
| 661 | pr_info("%s: can't deregister tunnel\n", __func__); |
| 662 | #endif |
Eric W. Biederman | 86de8a6 | 2009-11-29 15:46:14 +0000 | [diff] [blame] | 663 | unregister_pernet_device(&ipip_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | } |
| 665 | |
| 666 | module_init(ipip_init); |
| 667 | module_exit(ipip_fini); |
| 668 | MODULE_LICENSE("GPL"); |
Tom Gundersen | f98f89a | 2014-05-15 23:21:30 +0200 | [diff] [blame] | 669 | MODULE_ALIAS_RTNL_LINK("ipip"); |
Vasiliy Kulikov | 8909c9a | 2011-03-02 00:33:13 +0300 | [diff] [blame] | 670 | MODULE_ALIAS_NETDEV("tunl0"); |