Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /** -*- linux-c -*- *********************************************************** |
| 2 | * Linux PPP over Ethernet (PPPoX/PPPoE) Sockets |
| 3 | * |
| 4 | * PPPoX --- Generic PPP encapsulation socket family |
| 5 | * PPPoE --- PPP over Ethernet (RFC 2516) |
| 6 | * |
| 7 | * |
| 8 | * Version: 0.7.0 |
| 9 | * |
Florian Zumbiehl | 90719db | 2007-03-02 13:16:56 -0800 | [diff] [blame] | 10 | * 070228 : Fix to allow multiple sessions with same remote MAC and same |
| 11 | * session id by including the local device ifindex in the |
| 12 | * tuple identifying a session. This also ensures packets can't |
| 13 | * be injected into a session from interfaces other than the one |
| 14 | * specified by userspace. Florian Zumbiehl <florz@florz.de> |
| 15 | * (Oh, BTW, this one is YYMMDD, in case you were wondering ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | * 220102 : Fix module use count on failure in pppoe_create, pppox_sk -acme |
| 17 | * 030700 : Fixed connect logic to allow for disconnect. |
| 18 | * 270700 : Fixed potential SMP problems; we must protect against |
| 19 | * simultaneous invocation of ppp_input |
| 20 | * and ppp_unregister_channel. |
| 21 | * 040800 : Respect reference count mechanisms on net-devices. |
| 22 | * 200800 : fix kfree(skb) in pppoe_rcv (acme) |
| 23 | * Module reference count is decremented in the right spot now, |
| 24 | * guards against sock_put not actually freeing the sk |
| 25 | * in pppoe_release. |
| 26 | * 051000 : Initialization cleanup. |
| 27 | * 111100 : Fix recvmsg. |
| 28 | * 050101 : Fix PADT procesing. |
| 29 | * 140501 : Use pppoe_rcv_core to handle all backlog. (Alexey) |
| 30 | * 170701 : Do not lock_sock with rwlock held. (DaveM) |
| 31 | * Ignore discovery frames if user has socket |
| 32 | * locked. (DaveM) |
| 33 | * Ignore return value of dev_queue_xmit in __pppoe_xmit |
| 34 | * or else we may kfree an SKB twice. (DaveM) |
| 35 | * 190701 : When doing copies of skb's in __pppoe_xmit, always delete |
| 36 | * the original skb that was passed in on success, never on |
| 37 | * failure. Delete the copy of the skb on failure to avoid |
| 38 | * a memory leak. |
| 39 | * 081001 : Misc. cleanup (licence string, non-blocking, prevent |
| 40 | * reference of device on close). |
| 41 | * 121301 : New ppp channels interface; cannot unregister a channel |
| 42 | * from interrupts. Thus, we mark the socket as a ZOMBIE |
| 43 | * and do the unregistration later. |
| 44 | * 081002 : seq_file support for proc stuff -acme |
| 45 | * 111602 : Merge all 2.4 fixes into 2.5/2.6 tree. Label 2.5/2.6 |
| 46 | * as version 0.7. Spacing cleanup. |
| 47 | * Author: Michal Ostrowski <mostrows@speakeasy.net> |
| 48 | * Contributors: |
| 49 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
| 50 | * David S. Miller (davem@redhat.com) |
| 51 | * |
| 52 | * License: |
| 53 | * This program is free software; you can redistribute it and/or |
| 54 | * modify it under the terms of the GNU General Public License |
| 55 | * as published by the Free Software Foundation; either version |
| 56 | * 2 of the License, or (at your option) any later version. |
| 57 | * |
| 58 | */ |
| 59 | |
| 60 | #include <linux/string.h> |
| 61 | #include <linux/module.h> |
| 62 | #include <linux/kernel.h> |
| 63 | #include <linux/slab.h> |
| 64 | #include <linux/errno.h> |
| 65 | #include <linux/netdevice.h> |
| 66 | #include <linux/net.h> |
| 67 | #include <linux/inetdevice.h> |
| 68 | #include <linux/etherdevice.h> |
| 69 | #include <linux/skbuff.h> |
| 70 | #include <linux/init.h> |
| 71 | #include <linux/if_ether.h> |
| 72 | #include <linux/if_pppox.h> |
| 73 | #include <linux/ppp_channel.h> |
| 74 | #include <linux/ppp_defs.h> |
Paul Mackerras | 4b32da2b | 2012-03-04 12:56:55 +0000 | [diff] [blame] | 75 | #include <linux/ppp-ioctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #include <linux/notifier.h> |
| 77 | #include <linux/file.h> |
| 78 | #include <linux/proc_fs.h> |
| 79 | #include <linux/seq_file.h> |
| 80 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 81 | #include <linux/nsproxy.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 82 | #include <net/net_namespace.h> |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 83 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | #include <net/sock.h> |
| 85 | |
| 86 | #include <asm/uaccess.h> |
| 87 | |
| 88 | #define PPPOE_HASH_BITS 4 |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 89 | #define PPPOE_HASH_SIZE (1 << PPPOE_HASH_BITS) |
| 90 | #define PPPOE_HASH_MASK (PPPOE_HASH_SIZE - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb); |
| 93 | |
David S. Miller | 17ba15f | 2005-12-27 20:57:40 -0800 | [diff] [blame] | 94 | static const struct proto_ops pppoe_ops; |
stephen hemminger | d7100da | 2010-08-04 07:34:36 +0000 | [diff] [blame] | 95 | static const struct ppp_channel_ops pppoe_chan_ops; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 96 | |
| 97 | /* per-net private data for this module */ |
Eric Dumazet | f99189b | 2009-11-17 10:42:49 +0000 | [diff] [blame] | 98 | static int pppoe_net_id __read_mostly; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 99 | struct pppoe_net { |
| 100 | /* |
| 101 | * we could use _single_ hash table for all |
| 102 | * nets by injecting net id into the hash but |
| 103 | * it would increase hash chains and add |
| 104 | * a few additional math comparations messy |
| 105 | * as well, moreover in case of SMP less locking |
| 106 | * controversy here |
| 107 | */ |
| 108 | struct pppox_sock *hash_table[PPPOE_HASH_SIZE]; |
| 109 | rwlock_t hash_lock; |
| 110 | }; |
| 111 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 112 | /* |
| 113 | * PPPoE could be in the following stages: |
| 114 | * 1) Discovery stage (to obtain remote MAC and Session ID) |
| 115 | * 2) Session stage (MAC and SID are known) |
| 116 | * |
| 117 | * Ethernet frames have a special tag for this but |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 118 | * we use simpler approach based on session id |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 119 | */ |
| 120 | static inline bool stage_session(__be16 sid) |
| 121 | { |
| 122 | return sid != 0; |
| 123 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 125 | static inline struct pppoe_net *pppoe_pernet(struct net *net) |
| 126 | { |
| 127 | BUG_ON(!net); |
| 128 | |
| 129 | return net_generic(net, pppoe_net_id); |
| 130 | } |
| 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | static inline int cmp_2_addr(struct pppoe_addr *a, struct pppoe_addr *b) |
| 133 | { |
dingtianhong | 7ed8ca5 | 2013-12-26 19:40:35 +0800 | [diff] [blame] | 134 | return a->sid == b->sid && ether_addr_equal(a->remote, b->remote); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
| 136 | |
Al Viro | b963dc1 | 2007-08-23 02:55:33 -0400 | [diff] [blame] | 137 | static inline int cmp_addr(struct pppoe_addr *a, __be16 sid, char *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
dingtianhong | 7ed8ca5 | 2013-12-26 19:40:35 +0800 | [diff] [blame] | 139 | return a->sid == sid && ether_addr_equal(a->remote, addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | } |
| 141 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 142 | #if 8 % PPPOE_HASH_BITS |
Florian Zumbiehl | f1543f8 | 2007-07-31 13:47:57 -0700 | [diff] [blame] | 143 | #error 8 must be a multiple of PPPOE_HASH_BITS |
| 144 | #endif |
| 145 | |
Al Viro | b963dc1 | 2007-08-23 02:55:33 -0400 | [diff] [blame] | 146 | static int hash_item(__be16 sid, unsigned char *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | { |
Florian Zumbiehl | f1543f8 | 2007-07-31 13:47:57 -0700 | [diff] [blame] | 148 | unsigned char hash = 0; |
| 149 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 151 | for (i = 0; i < ETH_ALEN; i++) |
Florian Zumbiehl | f1543f8 | 2007-07-31 13:47:57 -0700 | [diff] [blame] | 152 | hash ^= addr[i]; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 153 | for (i = 0; i < sizeof(sid_t) * 8; i += 8) |
| 154 | hash ^= (__force __u32)sid >> i; |
| 155 | for (i = 8; (i >>= 1) >= PPPOE_HASH_BITS;) |
| 156 | hash ^= hash >> i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 158 | return hash & PPPOE_HASH_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | /********************************************************************** |
| 162 | * |
| 163 | * Set/get/delete/rehash items (internal versions) |
| 164 | * |
| 165 | **********************************************************************/ |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 166 | static struct pppox_sock *__get_item(struct pppoe_net *pn, __be16 sid, |
| 167 | unsigned char *addr, int ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | { |
| 169 | int hash = hash_item(sid, addr); |
| 170 | struct pppox_sock *ret; |
| 171 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 172 | ret = pn->hash_table[hash]; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 173 | while (ret) { |
| 174 | if (cmp_addr(&ret->pppoe_pa, sid, addr) && |
| 175 | ret->pppoe_ifindex == ifindex) |
| 176 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 178 | ret = ret->next; |
| 179 | } |
| 180 | |
| 181 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | } |
| 183 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 184 | static int __set_item(struct pppoe_net *pn, struct pppox_sock *po) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
| 186 | int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote); |
| 187 | struct pppox_sock *ret; |
| 188 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 189 | ret = pn->hash_table[hash]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | while (ret) { |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 191 | if (cmp_2_addr(&ret->pppoe_pa, &po->pppoe_pa) && |
| 192 | ret->pppoe_ifindex == po->pppoe_ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | return -EALREADY; |
| 194 | |
| 195 | ret = ret->next; |
| 196 | } |
| 197 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 198 | po->next = pn->hash_table[hash]; |
| 199 | pn->hash_table[hash] = po; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | return 0; |
| 202 | } |
| 203 | |
Rami Rosen | 3b12bb6 | 2012-05-17 05:04:50 +0000 | [diff] [blame] | 204 | static void __delete_item(struct pppoe_net *pn, __be16 sid, |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 205 | char *addr, int ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | { |
| 207 | int hash = hash_item(sid, addr); |
| 208 | struct pppox_sock *ret, **src; |
| 209 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 210 | ret = pn->hash_table[hash]; |
| 211 | src = &pn->hash_table[hash]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | while (ret) { |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 214 | if (cmp_addr(&ret->pppoe_pa, sid, addr) && |
| 215 | ret->pppoe_ifindex == ifindex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | *src = ret->next; |
| 217 | break; |
| 218 | } |
| 219 | |
| 220 | src = &ret->next; |
| 221 | ret = ret->next; |
| 222 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | /********************************************************************** |
| 226 | * |
| 227 | * Set/get/delete/rehash items |
| 228 | * |
| 229 | **********************************************************************/ |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 230 | static inline struct pppox_sock *get_item(struct pppoe_net *pn, __be16 sid, |
| 231 | unsigned char *addr, int ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { |
| 233 | struct pppox_sock *po; |
| 234 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 235 | read_lock_bh(&pn->hash_lock); |
| 236 | po = __get_item(pn, sid, addr, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | if (po) |
| 238 | sock_hold(sk_pppox(po)); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 239 | read_unlock_bh(&pn->hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | return po; |
| 242 | } |
| 243 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 244 | static inline struct pppox_sock *get_item_by_addr(struct net *net, |
| 245 | struct sockaddr_pppox *sp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | { |
Florian Zumbiehl | bfafb26 | 2007-04-20 16:56:31 -0700 | [diff] [blame] | 247 | struct net_device *dev; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 248 | struct pppoe_net *pn; |
Eric Dumazet | 1178f66 | 2009-11-01 19:51:22 +0000 | [diff] [blame] | 249 | struct pppox_sock *pppox_sock = NULL; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 250 | |
Florian Zumbiehl | 90719db | 2007-03-02 13:16:56 -0800 | [diff] [blame] | 251 | int ifindex; |
| 252 | |
Eric Dumazet | 1178f66 | 2009-11-01 19:51:22 +0000 | [diff] [blame] | 253 | rcu_read_lock(); |
| 254 | dev = dev_get_by_name_rcu(net, sp->sa_addr.pppoe.dev); |
| 255 | if (dev) { |
| 256 | ifindex = dev->ifindex; |
Jiri Pirko | be9e969 | 2010-04-26 01:46:12 +0000 | [diff] [blame] | 257 | pn = pppoe_pernet(net); |
Eric Dumazet | 1178f66 | 2009-11-01 19:51:22 +0000 | [diff] [blame] | 258 | pppox_sock = get_item(pn, sp->sa_addr.pppoe.sid, |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 259 | sp->sa_addr.pppoe.remote, ifindex); |
Eric Dumazet | 1178f66 | 2009-11-01 19:51:22 +0000 | [diff] [blame] | 260 | } |
| 261 | rcu_read_unlock(); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 262 | return pppox_sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
| 264 | |
Rami Rosen | 3b12bb6 | 2012-05-17 05:04:50 +0000 | [diff] [blame] | 265 | static inline void delete_item(struct pppoe_net *pn, __be16 sid, |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 266 | char *addr, int ifindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | { |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 268 | write_lock_bh(&pn->hash_lock); |
Rami Rosen | 3b12bb6 | 2012-05-17 05:04:50 +0000 | [diff] [blame] | 269 | __delete_item(pn, sid, addr, ifindex); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 270 | write_unlock_bh(&pn->hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
| 272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | /*************************************************************************** |
| 274 | * |
| 275 | * Handler for device events. |
| 276 | * Certain device events require that sockets be unconnected. |
| 277 | * |
| 278 | **************************************************************************/ |
| 279 | |
| 280 | static void pppoe_flush_dev(struct net_device *dev) |
| 281 | { |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 282 | struct pppoe_net *pn; |
| 283 | int i; |
| 284 | |
Dan Carpenter | a5e9315 | 2010-05-22 10:27:48 +0000 | [diff] [blame] | 285 | pn = pppoe_pernet(dev_net(dev)); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 286 | write_lock_bh(&pn->hash_lock); |
| 287 | for (i = 0; i < PPPOE_HASH_SIZE; i++) { |
| 288 | struct pppox_sock *po = pn->hash_table[i]; |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 289 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 291 | while (po) { |
| 292 | while (po && po->pppoe_dev != dev) { |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 293 | po = po->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 295 | |
| 296 | if (!po) |
| 297 | break; |
| 298 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 299 | sk = sk_pppox(po); |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 300 | |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 301 | /* We always grab the socket lock, followed by the |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 302 | * hash_lock, in that order. Since we should hold the |
| 303 | * sock lock while doing any unbinding, we need to |
| 304 | * release the lock we're holding. Hold a reference to |
| 305 | * the sock so it doesn't disappear as we're jumping |
| 306 | * between locks. |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 307 | */ |
| 308 | |
| 309 | sock_hold(sk); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 310 | write_unlock_bh(&pn->hash_lock); |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 311 | lock_sock(sk); |
| 312 | |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 313 | if (po->pppoe_dev == dev && |
Guillaume Nault | a8acce6 | 2015-11-19 12:53:21 +0100 | [diff] [blame] | 314 | sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND)) { |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 315 | pppox_unbind_sock(sk); |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 316 | sk->sk_state_change(sk); |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 317 | po->pppoe_dev = NULL; |
| 318 | dev_put(dev); |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | release_sock(sk); |
| 322 | sock_put(sk); |
| 323 | |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 324 | /* Restart the process from the start of the current |
| 325 | * hash chain. We dropped locks so the world may have |
| 326 | * change from underneath us. |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 327 | */ |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 328 | |
| 329 | BUG_ON(pppoe_pernet(dev_net(dev)) == NULL); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 330 | write_lock_bh(&pn->hash_lock); |
| 331 | po = pn->hash_table[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } |
| 333 | } |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 334 | write_unlock_bh(&pn->hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | static int pppoe_device_event(struct notifier_block *this, |
| 338 | unsigned long event, void *ptr) |
| 339 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 340 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | /* Only look at sockets that are using this specific device. */ |
| 343 | switch (event) { |
David S. Miller | 680ba7c | 2011-07-18 11:48:28 -0700 | [diff] [blame] | 344 | case NETDEV_CHANGEADDR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | case NETDEV_CHANGEMTU: |
David S. Miller | 680ba7c | 2011-07-18 11:48:28 -0700 | [diff] [blame] | 346 | /* A change in mtu or address is a bad thing, requiring |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | * LCP re-negotiation. |
| 348 | */ |
| 349 | |
| 350 | case NETDEV_GOING_DOWN: |
| 351 | case NETDEV_DOWN: |
| 352 | /* Find every socket on this device and kill it. */ |
| 353 | pppoe_flush_dev(dev); |
| 354 | break; |
| 355 | |
| 356 | default: |
| 357 | break; |
Joe Perches | ee289b6 | 2010-05-17 22:47:34 -0700 | [diff] [blame] | 358 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | return NOTIFY_DONE; |
| 361 | } |
| 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | static struct notifier_block pppoe_notifier = { |
| 364 | .notifier_call = pppoe_device_event, |
| 365 | }; |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | /************************************************************************ |
| 368 | * |
| 369 | * Do the real work of receiving a PPPoE Session frame. |
| 370 | * |
| 371 | ***********************************************************************/ |
| 372 | static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb) |
| 373 | { |
| 374 | struct pppox_sock *po = pppox_sk(sk); |
Florian Zumbiehl | bfafb26 | 2007-04-20 16:56:31 -0700 | [diff] [blame] | 375 | struct pppox_sock *relay_po; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 377 | /* Backlog receive. Semantics of backlog rcv preclude any code from |
| 378 | * executing in lock_sock()/release_sock() bounds; meaning sk->sk_state |
| 379 | * can't change. |
| 380 | */ |
| 381 | |
Joakim Tjernlund | a068833 | 2015-04-20 21:07:48 +0200 | [diff] [blame] | 382 | if (skb->pkt_type == PACKET_OTHERHOST) |
| 383 | goto abort_kfree; |
| 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | if (sk->sk_state & PPPOX_BOUND) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | ppp_input(&po->chan, skb); |
| 387 | } else if (sk->sk_state & PPPOX_RELAY) { |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 388 | relay_po = get_item_by_addr(sock_net(sk), |
| 389 | &po->pppoe_relay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | if (relay_po == NULL) |
| 391 | goto abort_kfree; |
| 392 | |
| 393 | if ((sk_pppox(relay_po)->sk_state & PPPOX_CONNECTED) == 0) |
| 394 | goto abort_put; |
| 395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | if (!__pppoe_xmit(sk_pppox(relay_po), skb)) |
| 397 | goto abort_put; |
Guillaume Nault | 29e7326 | 2016-02-15 17:01:10 +0100 | [diff] [blame] | 398 | |
| 399 | sock_put(sk_pppox(relay_po)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | } else { |
| 401 | if (sock_queue_rcv_skb(sk, skb)) |
| 402 | goto abort_kfree; |
| 403 | } |
| 404 | |
| 405 | return NET_RX_SUCCESS; |
| 406 | |
| 407 | abort_put: |
| 408 | sock_put(sk_pppox(relay_po)); |
| 409 | |
| 410 | abort_kfree: |
| 411 | kfree_skb(skb); |
| 412 | return NET_RX_DROP; |
| 413 | } |
| 414 | |
| 415 | /************************************************************************ |
| 416 | * |
| 417 | * Receive wrapper called in BH context. |
| 418 | * |
| 419 | ***********************************************************************/ |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 420 | static int pppoe_rcv(struct sk_buff *skb, struct net_device *dev, |
| 421 | struct packet_type *pt, struct net_device *orig_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | { |
| 423 | struct pppoe_hdr *ph; |
| 424 | struct pppox_sock *po; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 425 | struct pppoe_net *pn; |
Herbert Xu | 392fdb0 | 2008-06-10 14:07:25 -0700 | [diff] [blame] | 426 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 428 | skb = skb_share_check(skb, GFP_ATOMIC); |
| 429 | if (!skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | goto out; |
| 431 | |
Herbert Xu | 31bac44 | 2007-09-16 16:19:20 -0700 | [diff] [blame] | 432 | if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) |
| 433 | goto drop; |
| 434 | |
Arnaldo Carvalho de Melo | 797659f | 2007-03-10 15:56:08 -0300 | [diff] [blame] | 435 | ph = pppoe_hdr(skb); |
Herbert Xu | 392fdb0 | 2008-06-10 14:07:25 -0700 | [diff] [blame] | 436 | len = ntohs(ph->length); |
| 437 | |
| 438 | skb_pull_rcsum(skb, sizeof(*ph)); |
| 439 | if (skb->len < len) |
| 440 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
David S. Miller | 263e69c | 2008-10-30 23:11:44 -0700 | [diff] [blame] | 442 | if (pskb_trim_rcsum(skb, len)) |
Herbert Xu | 392fdb0 | 2008-06-10 14:07:25 -0700 | [diff] [blame] | 443 | goto drop; |
| 444 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 445 | pn = pppoe_pernet(dev_net(dev)); |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 446 | |
| 447 | /* Note that get_item does a sock_hold(), so sk_pppox(po) |
| 448 | * is known to be safe. |
| 449 | */ |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 450 | po = get_item(pn, ph->sid, eth_hdr(skb)->h_source, dev->ifindex); |
David S. Miller | 263e69c | 2008-10-30 23:11:44 -0700 | [diff] [blame] | 451 | if (!po) |
Herbert Xu | 392fdb0 | 2008-06-10 14:07:25 -0700 | [diff] [blame] | 452 | goto drop; |
| 453 | |
| 454 | return sk_receive_skb(sk_pppox(po), skb, 0); |
| 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | drop: |
| 457 | kfree_skb(skb); |
| 458 | out: |
| 459 | return NET_RX_DROP; |
| 460 | } |
| 461 | |
Simon Farnsworth | 287f3a9 | 2015-03-01 10:54:39 +0000 | [diff] [blame] | 462 | static void pppoe_unbind_sock_work(struct work_struct *work) |
| 463 | { |
| 464 | struct pppox_sock *po = container_of(work, struct pppox_sock, |
| 465 | proto.pppoe.padt_work); |
| 466 | struct sock *sk = sk_pppox(po); |
| 467 | |
| 468 | lock_sock(sk); |
Felix Fietkau | 665a6cd | 2015-05-09 23:08:38 +0200 | [diff] [blame] | 469 | if (po->pppoe_dev) { |
| 470 | dev_put(po->pppoe_dev); |
| 471 | po->pppoe_dev = NULL; |
| 472 | } |
Simon Farnsworth | 287f3a9 | 2015-03-01 10:54:39 +0000 | [diff] [blame] | 473 | pppox_unbind_sock(sk); |
| 474 | release_sock(sk); |
| 475 | sock_put(sk); |
| 476 | } |
| 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | /************************************************************************ |
| 479 | * |
| 480 | * Receive a PPPoE Discovery frame. |
| 481 | * This is solely for detection of PADT frames |
| 482 | * |
| 483 | ***********************************************************************/ |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 484 | static int pppoe_disc_rcv(struct sk_buff *skb, struct net_device *dev, |
| 485 | struct packet_type *pt, struct net_device *orig_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
| 487 | { |
| 488 | struct pppoe_hdr *ph; |
| 489 | struct pppox_sock *po; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 490 | struct pppoe_net *pn; |
Eric W. Biederman | e730c15 | 2007-09-17 11:53:39 -0700 | [diff] [blame] | 491 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 492 | skb = skb_share_check(skb, GFP_ATOMIC); |
| 493 | if (!skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | goto out; |
| 495 | |
Herbert Xu | bc6cffd1 | 2008-06-10 14:08:25 -0700 | [diff] [blame] | 496 | if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) |
| 497 | goto abort; |
| 498 | |
Arnaldo Carvalho de Melo | 797659f | 2007-03-10 15:56:08 -0300 | [diff] [blame] | 499 | ph = pppoe_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | if (ph->code != PADT_CODE) |
| 501 | goto abort; |
| 502 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 503 | pn = pppoe_pernet(dev_net(dev)); |
| 504 | po = get_item(pn, ph->sid, eth_hdr(skb)->h_source, dev->ifindex); |
Guillaume Nault | 8734e48 | 2015-11-19 12:52:56 +0100 | [diff] [blame] | 505 | if (po) |
Simon Farnsworth | 287f3a9 | 2015-03-01 10:54:39 +0000 | [diff] [blame] | 506 | if (!schedule_work(&po->proto.pppoe.padt_work)) |
Guillaume Nault | 8734e48 | 2015-11-19 12:52:56 +0100 | [diff] [blame] | 507 | sock_put(sk_pppox(po)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
| 509 | abort: |
| 510 | kfree_skb(skb); |
| 511 | out: |
| 512 | return NET_RX_SUCCESS; /* Lies... :-) */ |
| 513 | } |
| 514 | |
Stephen Hemminger | 7546dd9 | 2009-03-09 08:18:29 +0000 | [diff] [blame] | 515 | static struct packet_type pppoes_ptype __read_mostly = { |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 516 | .type = cpu_to_be16(ETH_P_PPP_SES), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | .func = pppoe_rcv, |
| 518 | }; |
| 519 | |
Stephen Hemminger | 7546dd9 | 2009-03-09 08:18:29 +0000 | [diff] [blame] | 520 | static struct packet_type pppoed_ptype __read_mostly = { |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 521 | .type = cpu_to_be16(ETH_P_PPP_DISC), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | .func = pppoe_disc_rcv, |
| 523 | }; |
| 524 | |
Stephen Hemminger | 7546dd9 | 2009-03-09 08:18:29 +0000 | [diff] [blame] | 525 | static struct proto pppoe_sk_proto __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | .name = "PPPOE", |
| 527 | .owner = THIS_MODULE, |
| 528 | .obj_size = sizeof(struct pppox_sock), |
| 529 | }; |
| 530 | |
| 531 | /*********************************************************************** |
| 532 | * |
| 533 | * Initialize a new struct sock. |
| 534 | * |
| 535 | **********************************************************************/ |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 536 | static int pppoe_create(struct net *net, struct socket *sock, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | struct sock *sk; |
| 539 | |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 540 | sk = sk_alloc(net, PF_PPPOX, GFP_KERNEL, &pppoe_sk_proto, kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | if (!sk) |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 542 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
| 544 | sock_init_data(sock, sk); |
| 545 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 546 | sock->state = SS_UNCONNECTED; |
| 547 | sock->ops = &pppoe_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 549 | sk->sk_backlog_rcv = pppoe_rcv_core; |
| 550 | sk->sk_state = PPPOX_NONE; |
| 551 | sk->sk_type = SOCK_STREAM; |
| 552 | sk->sk_family = PF_PPPOX; |
| 553 | sk->sk_protocol = PX_PROTO_OE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Guillaume Nault | fe53985 | 2015-12-03 16:49:32 +0100 | [diff] [blame] | 555 | INIT_WORK(&pppox_sk(sk)->proto.pppoe.padt_work, |
| 556 | pppoe_unbind_sock_work); |
| 557 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 558 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | static int pppoe_release(struct socket *sock) |
| 562 | { |
| 563 | struct sock *sk = sock->sk; |
| 564 | struct pppox_sock *po; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 565 | struct pppoe_net *pn; |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 566 | struct net *net = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
| 568 | if (!sk) |
| 569 | return 0; |
| 570 | |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 571 | lock_sock(sk); |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 572 | if (sock_flag(sk, SOCK_DEAD)) { |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 573 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | return -EBADF; |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 575 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 577 | po = pppox_sk(sk); |
| 578 | |
Guillaume Nault | 1acea4f | 2015-10-22 16:57:10 +0200 | [diff] [blame] | 579 | if (po->pppoe_dev) { |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 580 | dev_put(po->pppoe_dev); |
| 581 | po->pppoe_dev = NULL; |
| 582 | } |
| 583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | pppox_unbind_sock(sk); |
| 585 | |
| 586 | /* Signal the death of the socket. */ |
| 587 | sk->sk_state = PPPOX_DEAD; |
| 588 | |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 589 | net = sock_net(sk); |
| 590 | pn = pppoe_pernet(net); |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 591 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 592 | /* |
| 593 | * protect "po" from concurrent updates |
| 594 | * on pppoe_flush_dev |
| 595 | */ |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 596 | delete_item(pn, po->pppoe_pa.sid, po->pppoe_pa.remote, |
| 597 | po->pppoe_ifindex); |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | sock_orphan(sk); |
| 600 | sock->sk = NULL; |
| 601 | |
| 602 | skb_queue_purge(&sk->sk_receive_queue); |
Michal Ostrowski | 42dc9cd | 2007-04-20 16:59:24 -0700 | [diff] [blame] | 603 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | sock_put(sk); |
| 605 | |
Florian Zumbiehl | bfafb26 | 2007-04-20 16:56:31 -0700 | [diff] [blame] | 606 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
| 608 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr, |
| 610 | int sockaddr_len, int flags) |
| 611 | { |
| 612 | struct sock *sk = sock->sk; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 613 | struct sockaddr_pppox *sp = (struct sockaddr_pppox *)uservaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | struct pppox_sock *po = pppox_sk(sk); |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 615 | struct net_device *dev = NULL; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 616 | struct pppoe_net *pn; |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 617 | struct net *net = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | int error; |
| 619 | |
| 620 | lock_sock(sk); |
| 621 | |
| 622 | error = -EINVAL; |
Guillaume Nault | ecaae08 | 2018-04-23 16:38:27 +0200 | [diff] [blame] | 623 | |
| 624 | if (sockaddr_len != sizeof(struct sockaddr_pppox)) |
| 625 | goto end; |
| 626 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | if (sp->sa_protocol != PX_PROTO_OE) |
| 628 | goto end; |
| 629 | |
| 630 | /* Check for already bound sockets */ |
| 631 | error = -EBUSY; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 632 | if ((sk->sk_state & PPPOX_CONNECTED) && |
| 633 | stage_session(sp->sa_addr.pppoe.sid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | goto end; |
| 635 | |
| 636 | /* Check for already disconnected sockets, on attempts to disconnect */ |
| 637 | error = -EALREADY; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 638 | if ((sk->sk_state & PPPOX_DEAD) && |
| 639 | !stage_session(sp->sa_addr.pppoe.sid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | goto end; |
| 641 | |
| 642 | error = 0; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 643 | |
| 644 | /* Delete the old binding */ |
| 645 | if (stage_session(po->pppoe_pa.sid)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | pppox_unbind_sock(sk); |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 647 | pn = pppoe_pernet(sock_net(sk)); |
| 648 | delete_item(pn, po->pppoe_pa.sid, |
| 649 | po->pppoe_pa.remote, po->pppoe_ifindex); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 650 | if (po->pppoe_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | dev_put(po->pppoe_dev); |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 652 | po->pppoe_dev = NULL; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 653 | } |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 654 | |
Guillaume Nault | fe53985 | 2015-12-03 16:49:32 +0100 | [diff] [blame] | 655 | po->pppoe_ifindex = 0; |
| 656 | memset(&po->pppoe_pa, 0, sizeof(po->pppoe_pa)); |
| 657 | memset(&po->pppoe_relay, 0, sizeof(po->pppoe_relay)); |
| 658 | memset(&po->chan, 0, sizeof(po->chan)); |
| 659 | po->next = NULL; |
| 660 | po->num = 0; |
| 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | sk->sk_state = PPPOX_NONE; |
| 663 | } |
| 664 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 665 | /* Re-bind in session stage only */ |
| 666 | if (stage_session(sp->sa_addr.pppoe.sid)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | error = -ENODEV; |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 668 | net = sock_net(sk); |
| 669 | dev = dev_get_by_name(net, sp->sa_addr.pppoe.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | if (!dev) |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 671 | goto err_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
| 673 | po->pppoe_dev = dev; |
Florian Zumbiehl | 6f30e18 | 2007-03-04 16:03:22 -0800 | [diff] [blame] | 674 | po->pppoe_ifindex = dev->ifindex; |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 675 | pn = pppoe_pernet(net); |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 676 | if (!(dev->flags & IFF_UP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | goto err_put; |
Florian Zumbiehl | 74b885c | 2007-04-20 16:57:27 -0700 | [diff] [blame] | 678 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
| 680 | memcpy(&po->pppoe_pa, |
| 681 | &sp->sa_addr.pppoe, |
| 682 | sizeof(struct pppoe_addr)); |
| 683 | |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 684 | write_lock_bh(&pn->hash_lock); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 685 | error = __set_item(pn, po); |
| 686 | write_unlock_bh(&pn->hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | if (error < 0) |
| 688 | goto err_put; |
| 689 | |
| 690 | po->chan.hdrlen = (sizeof(struct pppoe_hdr) + |
| 691 | dev->hard_header_len); |
| 692 | |
Christoph Schulz | a8a3e41 | 2014-07-13 00:53:15 +0200 | [diff] [blame] | 693 | po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr) - 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | po->chan.private = sk; |
| 695 | po->chan.ops = &pppoe_chan_ops; |
| 696 | |
Cyrill Gorcunov | f5882c3 | 2009-01-21 15:55:40 -0800 | [diff] [blame] | 697 | error = ppp_register_net_channel(dev_net(dev), &po->chan); |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 698 | if (error) { |
| 699 | delete_item(pn, po->pppoe_pa.sid, |
| 700 | po->pppoe_pa.remote, po->pppoe_ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | goto err_put; |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 702 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | |
| 704 | sk->sk_state = PPPOX_CONNECTED; |
| 705 | } |
| 706 | |
| 707 | po->num = sp->sa_addr.pppoe.sid; |
| 708 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 709 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | release_sock(sk); |
| 711 | return error; |
| 712 | err_put: |
| 713 | if (po->pppoe_dev) { |
| 714 | dev_put(po->pppoe_dev); |
| 715 | po->pppoe_dev = NULL; |
| 716 | } |
| 717 | goto end; |
| 718 | } |
| 719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | static int pppoe_getname(struct socket *sock, struct sockaddr *uaddr, |
| 721 | int *usockaddr_len, int peer) |
| 722 | { |
| 723 | int len = sizeof(struct sockaddr_pppox); |
| 724 | struct sockaddr_pppox sp; |
| 725 | |
| 726 | sp.sa_family = AF_PPPOX; |
| 727 | sp.sa_protocol = PX_PROTO_OE; |
| 728 | memcpy(&sp.sa_addr.pppoe, &pppox_sk(sock->sk)->pppoe_pa, |
| 729 | sizeof(struct pppoe_addr)); |
| 730 | |
| 731 | memcpy(uaddr, &sp, len); |
| 732 | |
| 733 | *usockaddr_len = len; |
| 734 | |
| 735 | return 0; |
| 736 | } |
| 737 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | static int pppoe_ioctl(struct socket *sock, unsigned int cmd, |
| 739 | unsigned long arg) |
| 740 | { |
| 741 | struct sock *sk = sock->sk; |
| 742 | struct pppox_sock *po = pppox_sk(sk); |
Florian Zumbiehl | 86c1dcf | 2007-07-30 17:48:23 -0700 | [diff] [blame] | 743 | int val; |
| 744 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
| 746 | switch (cmd) { |
| 747 | case PPPIOCGMRU: |
| 748 | err = -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | if (!(sk->sk_state & PPPOX_CONNECTED)) |
| 750 | break; |
| 751 | |
| 752 | err = -EFAULT; |
| 753 | if (put_user(po->pppoe_dev->mtu - |
| 754 | sizeof(struct pppoe_hdr) - |
| 755 | PPP_HDRLEN, |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 756 | (int __user *)arg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | break; |
| 758 | err = 0; |
| 759 | break; |
| 760 | |
| 761 | case PPPIOCSMRU: |
| 762 | err = -ENXIO; |
| 763 | if (!(sk->sk_state & PPPOX_CONNECTED)) |
| 764 | break; |
| 765 | |
| 766 | err = -EFAULT; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 767 | if (get_user(val, (int __user *)arg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | break; |
| 769 | |
| 770 | if (val < (po->pppoe_dev->mtu |
| 771 | - sizeof(struct pppoe_hdr) |
| 772 | - PPP_HDRLEN)) |
| 773 | err = 0; |
| 774 | else |
| 775 | err = -EINVAL; |
| 776 | break; |
| 777 | |
| 778 | case PPPIOCSFLAGS: |
| 779 | err = -EFAULT; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 780 | if (get_user(val, (int __user *)arg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | break; |
| 782 | err = 0; |
| 783 | break; |
| 784 | |
| 785 | case PPPOEIOCSFWD: |
| 786 | { |
| 787 | struct pppox_sock *relay_po; |
| 788 | |
| 789 | err = -EBUSY; |
Guillaume Nault | a8acce6 | 2015-11-19 12:53:21 +0100 | [diff] [blame] | 790 | if (sk->sk_state & (PPPOX_BOUND | PPPOX_DEAD)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | break; |
| 792 | |
| 793 | err = -ENOTCONN; |
| 794 | if (!(sk->sk_state & PPPOX_CONNECTED)) |
| 795 | break; |
| 796 | |
| 797 | /* PPPoE address from the user specifies an outbound |
Florian Zumbiehl | 90719db | 2007-03-02 13:16:56 -0800 | [diff] [blame] | 798 | PPPoE address which frames are forwarded to */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | err = -EFAULT; |
| 800 | if (copy_from_user(&po->pppoe_relay, |
| 801 | (void __user *)arg, |
| 802 | sizeof(struct sockaddr_pppox))) |
| 803 | break; |
| 804 | |
| 805 | err = -EINVAL; |
| 806 | if (po->pppoe_relay.sa_family != AF_PPPOX || |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 807 | po->pppoe_relay.sa_protocol != PX_PROTO_OE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | break; |
| 809 | |
| 810 | /* Check that the socket referenced by the address |
| 811 | actually exists. */ |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 812 | relay_po = get_item_by_addr(sock_net(sk), &po->pppoe_relay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | if (!relay_po) |
| 814 | break; |
| 815 | |
| 816 | sock_put(sk_pppox(relay_po)); |
| 817 | sk->sk_state |= PPPOX_RELAY; |
| 818 | err = 0; |
| 819 | break; |
| 820 | } |
| 821 | |
| 822 | case PPPOEIOCDFWD: |
| 823 | err = -EALREADY; |
| 824 | if (!(sk->sk_state & PPPOX_RELAY)) |
| 825 | break; |
| 826 | |
| 827 | sk->sk_state &= ~PPPOX_RELAY; |
| 828 | err = 0; |
| 829 | break; |
| 830 | |
Florian Zumbiehl | 86c1dcf | 2007-07-30 17:48:23 -0700 | [diff] [blame] | 831 | default: |
| 832 | err = -ENOTTY; |
| 833 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
| 835 | return err; |
| 836 | } |
| 837 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 838 | static int pppoe_sendmsg(struct socket *sock, struct msghdr *m, |
| 839 | size_t total_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | { |
Florian Zumbiehl | bfafb26 | 2007-04-20 16:56:31 -0700 | [diff] [blame] | 841 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | struct sock *sk = sock->sk; |
| 843 | struct pppox_sock *po = pppox_sk(sk); |
Florian Zumbiehl | bfafb26 | 2007-04-20 16:56:31 -0700 | [diff] [blame] | 844 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | struct pppoe_hdr hdr; |
| 846 | struct pppoe_hdr *ph; |
| 847 | struct net_device *dev; |
| 848 | char *start; |
Guillaume Nault | 1bd21b1 | 2018-01-22 18:06:37 +0100 | [diff] [blame] | 849 | int hlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
Florian Zumbiehl | 8aeca8f | 2007-07-30 17:49:13 -0700 | [diff] [blame] | 851 | lock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) { |
| 853 | error = -ENOTCONN; |
| 854 | goto end; |
| 855 | } |
| 856 | |
| 857 | hdr.ver = 1; |
| 858 | hdr.type = 1; |
| 859 | hdr.code = 0; |
| 860 | hdr.sid = po->num; |
| 861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | dev = po->pppoe_dev; |
| 863 | |
| 864 | error = -EMSGSIZE; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 865 | if (total_len > (dev->mtu + dev->hard_header_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | goto end; |
| 867 | |
Guillaume Nault | 1bd21b1 | 2018-01-22 18:06:37 +0100 | [diff] [blame] | 868 | hlen = LL_RESERVED_SPACE(dev); |
| 869 | skb = sock_wmalloc(sk, hlen + sizeof(*ph) + total_len + |
| 870 | dev->needed_tailroom, 0, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | if (!skb) { |
| 872 | error = -ENOMEM; |
| 873 | goto end; |
| 874 | } |
| 875 | |
| 876 | /* Reserve space for headers. */ |
Guillaume Nault | 1bd21b1 | 2018-01-22 18:06:37 +0100 | [diff] [blame] | 877 | skb_reserve(skb, hlen); |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 878 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | |
| 880 | skb->dev = dev; |
| 881 | |
| 882 | skb->priority = sk->sk_priority; |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 883 | skb->protocol = cpu_to_be16(ETH_P_PPP_SES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 885 | ph = (struct pppoe_hdr *)skb_put(skb, total_len + sizeof(struct pppoe_hdr)); |
| 886 | start = (char *)&ph->tag[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | |
Al Viro | 6ce8e9c | 2014-04-06 21:25:44 -0400 | [diff] [blame] | 888 | error = memcpy_from_msg(start, m, total_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | if (error < 0) { |
| 890 | kfree_skb(skb); |
| 891 | goto end; |
| 892 | } |
| 893 | |
| 894 | error = total_len; |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 895 | dev_hard_header(skb, dev, ETH_P_PPP_SES, |
| 896 | po->pppoe_pa.remote, NULL, total_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
| 898 | memcpy(ph, &hdr, sizeof(struct pppoe_hdr)); |
| 899 | |
| 900 | ph->length = htons(total_len); |
| 901 | |
| 902 | dev_queue_xmit(skb); |
| 903 | |
| 904 | end: |
| 905 | release_sock(sk); |
| 906 | return error; |
| 907 | } |
| 908 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | /************************************************************************ |
| 910 | * |
| 911 | * xmit function for internal use. |
| 912 | * |
| 913 | ***********************************************************************/ |
| 914 | static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb) |
| 915 | { |
| 916 | struct pppox_sock *po = pppox_sk(sk); |
| 917 | struct net_device *dev = po->pppoe_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | struct pppoe_hdr *ph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | int data_len = skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
Michal Ostrowski | fb64bb5 | 2009-10-26 16:23:20 -0700 | [diff] [blame] | 921 | /* The higher-level PPP code (ppp_unregister_channel()) ensures the PPP |
| 922 | * xmit operations conclude prior to an unregistration call. Thus |
| 923 | * sk->sk_state cannot change, so we don't need to do lock_sock(). |
| 924 | * But, we also can't do a lock_sock since that introduces a potential |
| 925 | * deadlock as we'd reverse the lock ordering used when calling |
| 926 | * ppp_unregister_channel(). |
| 927 | */ |
| 928 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) |
| 930 | goto abort; |
| 931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | if (!dev) |
| 933 | goto abort; |
| 934 | |
Herbert Xu | db7bf6d | 2007-09-16 16:19:50 -0700 | [diff] [blame] | 935 | /* Copy the data if there is no space for the header or if it's |
| 936 | * read-only. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | */ |
Guillaume Nault | 1bd21b1 | 2018-01-22 18:06:37 +0100 | [diff] [blame] | 938 | if (skb_cow_head(skb, LL_RESERVED_SPACE(dev) + sizeof(*ph))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | goto abort; |
| 940 | |
Herbert Xu | 9355ec2 | 2007-09-16 16:20:21 -0700 | [diff] [blame] | 941 | __skb_push(skb, sizeof(*ph)); |
Herbert Xu | db7bf6d | 2007-09-16 16:19:50 -0700 | [diff] [blame] | 942 | skb_reset_network_header(skb); |
| 943 | |
Herbert Xu | 9355ec2 | 2007-09-16 16:20:21 -0700 | [diff] [blame] | 944 | ph = pppoe_hdr(skb); |
| 945 | ph->ver = 1; |
| 946 | ph->type = 1; |
| 947 | ph->code = 0; |
| 948 | ph->sid = po->num; |
| 949 | ph->length = htons(data_len); |
| 950 | |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 951 | skb->protocol = cpu_to_be16(ETH_P_PPP_SES); |
Herbert Xu | db7bf6d | 2007-09-16 16:19:50 -0700 | [diff] [blame] | 952 | skb->dev = dev; |
| 953 | |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 954 | dev_hard_header(skb, dev, ETH_P_PPP_SES, |
| 955 | po->pppoe_pa.remote, NULL, data_len); |
Herbert Xu | db7bf6d | 2007-09-16 16:19:50 -0700 | [diff] [blame] | 956 | |
Herbert Xu | 21d0c83 | 2007-09-19 10:45:02 -0700 | [diff] [blame] | 957 | dev_queue_xmit(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | return 1; |
| 959 | |
| 960 | abort: |
Herbert Xu | db7bf6d | 2007-09-16 16:19:50 -0700 | [diff] [blame] | 961 | kfree_skb(skb); |
Andrej Ota | 2a27a03 | 2010-12-12 15:06:16 -0800 | [diff] [blame] | 962 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | } |
| 964 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | /************************************************************************ |
| 966 | * |
| 967 | * xmit function called by generic PPP driver |
| 968 | * sends PPP frame over PPPoE socket |
| 969 | * |
| 970 | ***********************************************************************/ |
| 971 | static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb) |
| 972 | { |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 973 | struct sock *sk = (struct sock *)chan->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | return __pppoe_xmit(sk, skb); |
| 975 | } |
| 976 | |
stephen hemminger | d7100da | 2010-08-04 07:34:36 +0000 | [diff] [blame] | 977 | static const struct ppp_channel_ops pppoe_chan_ops = { |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 978 | .start_xmit = pppoe_xmit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | }; |
| 980 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 981 | static int pppoe_recvmsg(struct socket *sock, struct msghdr *m, |
| 982 | size_t total_len, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | { |
| 984 | struct sock *sk = sock->sk; |
Florian Zumbiehl | bfafb26 | 2007-04-20 16:56:31 -0700 | [diff] [blame] | 985 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
| 988 | if (sk->sk_state & PPPOX_BOUND) { |
| 989 | error = -EIO; |
| 990 | goto end; |
| 991 | } |
| 992 | |
| 993 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, |
| 994 | flags & MSG_DONTWAIT, &error); |
Florian Zumbiehl | bfafb26 | 2007-04-20 16:56:31 -0700 | [diff] [blame] | 995 | if (error < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | if (skb) { |
Stephen Hemminger | 2645a3c | 2008-06-20 21:58:02 -0700 | [diff] [blame] | 999 | total_len = min_t(size_t, total_len, skb->len); |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 1000 | error = skb_copy_datagram_msg(skb, 0, m, total_len); |
Eric Dumazet | 968d701 | 2012-05-18 20:23:00 +0000 | [diff] [blame] | 1001 | if (error == 0) { |
| 1002 | consume_skb(skb); |
| 1003 | return total_len; |
| 1004 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | } |
| 1006 | |
Arnaldo Carvalho de Melo | 797659f | 2007-03-10 15:56:08 -0300 | [diff] [blame] | 1007 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | end: |
| 1009 | return error; |
| 1010 | } |
| 1011 | |
| 1012 | #ifdef CONFIG_PROC_FS |
| 1013 | static int pppoe_seq_show(struct seq_file *seq, void *v) |
| 1014 | { |
| 1015 | struct pppox_sock *po; |
| 1016 | char *dev_name; |
| 1017 | |
| 1018 | if (v == SEQ_START_TOKEN) { |
| 1019 | seq_puts(seq, "Id Address Device\n"); |
| 1020 | goto out; |
| 1021 | } |
| 1022 | |
| 1023 | po = v; |
| 1024 | dev_name = po->pppoe_pa.dev; |
| 1025 | |
Johannes Berg | e174961 | 2008-10-27 15:59:26 -0700 | [diff] [blame] | 1026 | seq_printf(seq, "%08X %pM %8s\n", |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1027 | po->pppoe_pa.sid, po->pppoe_pa.remote, dev_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | out: |
| 1029 | return 0; |
| 1030 | } |
| 1031 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1032 | static inline struct pppox_sock *pppoe_get_idx(struct pppoe_net *pn, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | { |
Florian Zumbiehl | bfafb26 | 2007-04-20 16:56:31 -0700 | [diff] [blame] | 1034 | struct pppox_sock *po; |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 1035 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 1037 | for (i = 0; i < PPPOE_HASH_SIZE; i++) { |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1038 | po = pn->hash_table[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | while (po) { |
| 1040 | if (!pos--) |
| 1041 | goto out; |
| 1042 | po = po->next; |
| 1043 | } |
| 1044 | } |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1045 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | out: |
| 1047 | return po; |
| 1048 | } |
| 1049 | |
| 1050 | static void *pppoe_seq_start(struct seq_file *seq, loff_t *pos) |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1051 | __acquires(pn->hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | { |
Cyrill Gorcunov | 3617aa4 | 2009-01-26 21:11:02 -0800 | [diff] [blame] | 1053 | struct pppoe_net *pn = pppoe_pernet(seq_file_net(seq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | loff_t l = *pos; |
| 1055 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1056 | read_lock_bh(&pn->hash_lock); |
| 1057 | return l ? pppoe_get_idx(pn, --l) : SEQ_START_TOKEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | } |
| 1059 | |
| 1060 | static void *pppoe_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1061 | { |
Cyrill Gorcunov | 3617aa4 | 2009-01-26 21:11:02 -0800 | [diff] [blame] | 1062 | struct pppoe_net *pn = pppoe_pernet(seq_file_net(seq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | struct pppox_sock *po; |
| 1064 | |
| 1065 | ++*pos; |
| 1066 | if (v == SEQ_START_TOKEN) { |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1067 | po = pppoe_get_idx(pn, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | goto out; |
| 1069 | } |
| 1070 | po = v; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1071 | if (po->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | po = po->next; |
| 1073 | else { |
| 1074 | int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote); |
| 1075 | |
Eric Dumazet | 72fc939 | 2009-07-28 23:43:08 +0000 | [diff] [blame] | 1076 | po = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | while (++hash < PPPOE_HASH_SIZE) { |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1078 | po = pn->hash_table[hash]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | if (po) |
| 1080 | break; |
| 1081 | } |
| 1082 | } |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1083 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | out: |
| 1085 | return po; |
| 1086 | } |
| 1087 | |
| 1088 | static void pppoe_seq_stop(struct seq_file *seq, void *v) |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1089 | __releases(pn->hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | { |
Cyrill Gorcunov | 3617aa4 | 2009-01-26 21:11:02 -0800 | [diff] [blame] | 1091 | struct pppoe_net *pn = pppoe_pernet(seq_file_net(seq)); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1092 | read_unlock_bh(&pn->hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | } |
| 1094 | |
Jan Engelhardt | 4101dec | 2009-01-14 13:52:18 -0800 | [diff] [blame] | 1095 | static const struct seq_operations pppoe_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | .start = pppoe_seq_start, |
| 1097 | .next = pppoe_seq_next, |
| 1098 | .stop = pppoe_seq_stop, |
| 1099 | .show = pppoe_seq_show, |
| 1100 | }; |
| 1101 | |
| 1102 | static int pppoe_seq_open(struct inode *inode, struct file *file) |
| 1103 | { |
Cyrill Gorcunov | 3617aa4 | 2009-01-26 21:11:02 -0800 | [diff] [blame] | 1104 | return seq_open_net(inode, file, &pppoe_seq_ops, |
| 1105 | sizeof(struct seq_net_private)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | } |
| 1107 | |
Arjan van de Ven | d54b1fd | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 1108 | static const struct file_operations pppoe_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | .owner = THIS_MODULE, |
| 1110 | .open = pppoe_seq_open, |
| 1111 | .read = seq_read, |
| 1112 | .llseek = seq_lseek, |
Cyrill Gorcunov | 3617aa4 | 2009-01-26 21:11:02 -0800 | [diff] [blame] | 1113 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | }; |
| 1115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | #endif /* CONFIG_PROC_FS */ |
| 1117 | |
David S. Miller | 17ba15f | 2005-12-27 20:57:40 -0800 | [diff] [blame] | 1118 | static const struct proto_ops pppoe_ops = { |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 1119 | .family = AF_PPPOX, |
| 1120 | .owner = THIS_MODULE, |
| 1121 | .release = pppoe_release, |
| 1122 | .bind = sock_no_bind, |
| 1123 | .connect = pppoe_connect, |
| 1124 | .socketpair = sock_no_socketpair, |
| 1125 | .accept = sock_no_accept, |
| 1126 | .getname = pppoe_getname, |
| 1127 | .poll = datagram_poll, |
| 1128 | .listen = sock_no_listen, |
| 1129 | .shutdown = sock_no_shutdown, |
| 1130 | .setsockopt = sock_no_setsockopt, |
| 1131 | .getsockopt = sock_no_getsockopt, |
| 1132 | .sendmsg = pppoe_sendmsg, |
| 1133 | .recvmsg = pppoe_recvmsg, |
| 1134 | .mmap = sock_no_mmap, |
| 1135 | .ioctl = pppox_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | }; |
| 1137 | |
Eric Dumazet | 756e64a | 2010-09-21 06:43:54 +0000 | [diff] [blame] | 1138 | static const struct pppox_proto pppoe_proto = { |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 1139 | .create = pppoe_create, |
| 1140 | .ioctl = pppoe_ioctl, |
| 1141 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | }; |
| 1143 | |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1144 | static __net_init int pppoe_init_net(struct net *net) |
| 1145 | { |
Eric W. Biederman | c879a6f | 2009-11-29 15:46:10 +0000 | [diff] [blame] | 1146 | struct pppoe_net *pn = pppoe_pernet(net); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1147 | struct proc_dir_entry *pde; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1148 | |
| 1149 | rwlock_init(&pn->hash_lock); |
| 1150 | |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 1151 | pde = proc_create("pppoe", S_IRUGO, net->proc_net, &pppoe_seq_fops); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1152 | #ifdef CONFIG_PROC_FS |
Eric W. Biederman | c879a6f | 2009-11-29 15:46:10 +0000 | [diff] [blame] | 1153 | if (!pde) |
| 1154 | return -ENOMEM; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1155 | #endif |
| 1156 | |
| 1157 | return 0; |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1158 | } |
| 1159 | |
| 1160 | static __net_exit void pppoe_exit_net(struct net *net) |
| 1161 | { |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 1162 | remove_proc_entry("pppoe", net->proc_net); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1163 | } |
| 1164 | |
Alexey Dobriyan | 0012985 | 2009-02-09 18:05:16 -0800 | [diff] [blame] | 1165 | static struct pernet_operations pppoe_net_ops = { |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1166 | .init = pppoe_init_net, |
| 1167 | .exit = pppoe_exit_net, |
Eric W. Biederman | c879a6f | 2009-11-29 15:46:10 +0000 | [diff] [blame] | 1168 | .id = &pppoe_net_id, |
| 1169 | .size = sizeof(struct pppoe_net), |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1170 | }; |
| 1171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | static int __init pppoe_init(void) |
| 1173 | { |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1174 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | |
Eric W. Biederman | c879a6f | 2009-11-29 15:46:10 +0000 | [diff] [blame] | 1176 | err = register_pernet_device(&pppoe_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | if (err) |
| 1178 | goto out; |
| 1179 | |
Cyrill Gorcunov | 07f6642 | 2009-08-12 16:39:16 -0700 | [diff] [blame] | 1180 | err = proto_register(&pppoe_sk_proto, 0); |
| 1181 | if (err) |
| 1182 | goto out_unregister_net_ops; |
| 1183 | |
Cyrill Gorcunov | 6aba915 | 2009-01-21 15:54:15 -0800 | [diff] [blame] | 1184 | err = register_pppox_proto(PX_PROTO_OE, &pppoe_proto); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | if (err) |
| 1186 | goto out_unregister_pppoe_proto; |
| 1187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | dev_add_pack(&pppoes_ptype); |
| 1189 | dev_add_pack(&pppoed_ptype); |
| 1190 | register_netdevice_notifier(&pppoe_notifier); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1191 | |
| 1192 | return 0; |
| 1193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | out_unregister_pppoe_proto: |
| 1195 | proto_unregister(&pppoe_sk_proto); |
Cyrill Gorcunov | 07f6642 | 2009-08-12 16:39:16 -0700 | [diff] [blame] | 1196 | out_unregister_net_ops: |
Eric W. Biederman | c879a6f | 2009-11-29 15:46:10 +0000 | [diff] [blame] | 1197 | unregister_pernet_device(&pppoe_net_ops); |
Cyrill Gorcunov | a6bcf1c | 2009-01-21 15:54:54 -0800 | [diff] [blame] | 1198 | out: |
| 1199 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | } |
| 1201 | |
| 1202 | static void __exit pppoe_exit(void) |
| 1203 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | unregister_netdevice_notifier(&pppoe_notifier); |
Cyrill Gorcunov | 07f6642 | 2009-08-12 16:39:16 -0700 | [diff] [blame] | 1205 | dev_remove_pack(&pppoed_ptype); |
| 1206 | dev_remove_pack(&pppoes_ptype); |
| 1207 | unregister_pppox_proto(PX_PROTO_OE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | proto_unregister(&pppoe_sk_proto); |
Eric W. Biederman | c879a6f | 2009-11-29 15:46:10 +0000 | [diff] [blame] | 1209 | unregister_pernet_device(&pppoe_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | } |
| 1211 | |
| 1212 | module_init(pppoe_init); |
| 1213 | module_exit(pppoe_exit); |
| 1214 | |
| 1215 | MODULE_AUTHOR("Michal Ostrowski <mostrows@speakeasy.net>"); |
| 1216 | MODULE_DESCRIPTION("PPP over Ethernet driver"); |
| 1217 | MODULE_LICENSE("GPL"); |
Guillaume Nault | 681b4d8 | 2015-12-02 16:27:39 +0100 | [diff] [blame] | 1218 | MODULE_ALIAS_NET_PF_PROTO(PF_PPPOX, PX_PROTO_OE); |