1 /** -*- linux-c -*- ***********************************************************
2 * Linux PPP over Ethernet (PPPoX/PPPoE) Sockets
4 * PPPoX --- Generic PPP encapsulation socket family
5 * PPPoE --- PPP over Ethernet (RFC 2516)
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 ...)
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
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
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
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>
49 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
50 * David S. Miller (davem@redhat.com)
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.
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>
75 #include <linux/if_ppp.h>
76 #include <linux/notifier.h>
77 #include <linux/file.h>
78 #include <linux/proc_fs.h>
79 #include <linux/seq_file.h>
81 #include <net/net_namespace.h>
84 #include <asm/uaccess.h>
86 #define PPPOE_HASH_BITS 4
87 #define PPPOE_HASH_SIZE (1 << PPPOE_HASH_BITS)
88 #define PPPOE_HASH_MASK (PPPOE_HASH_SIZE - 1)
90 static int pppoe_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
91 static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb);
92 static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb);
94 static const struct proto_ops pppoe_ops;
95 static struct ppp_channel_ops pppoe_chan_ops;
96 static DEFINE_RWLOCK(pppoe_hash_lock);
99 * PPPoE could be in the following stages:
100 * 1) Discovery stage (to obtain remote MAC and Session ID)
101 * 2) Session stage (MAC and SID are known)
103 * Ethernet frames have a special tag for this but
104 * we use simplier approach based on session id
106 static inline bool stage_session(__be16 sid)
111 static inline int cmp_2_addr(struct pppoe_addr *a, struct pppoe_addr *b)
113 return a->sid == b->sid &&
114 (memcmp(a->remote, b->remote, ETH_ALEN) == 0);
117 static inline int cmp_addr(struct pppoe_addr *a, __be16 sid, char *addr)
119 return a->sid == sid &&
120 (memcmp(a->remote, addr, ETH_ALEN) == 0);
123 #if 8 % PPPOE_HASH_BITS
124 #error 8 must be a multiple of PPPOE_HASH_BITS
127 static int hash_item(__be16 sid, unsigned char *addr)
129 unsigned char hash = 0;
132 for (i = 0; i < ETH_ALEN; i++)
134 for (i = 0; i < sizeof(sid_t) * 8; i += 8)
135 hash ^= (__force __u32)sid >> i;
136 for (i = 8; (i >>= 1) >= PPPOE_HASH_BITS;)
139 return hash & PPPOE_HASH_MASK;
142 /* zeroed because its in .bss */
143 static struct pppox_sock *item_hash_table[PPPOE_HASH_SIZE];
145 /**********************************************************************
147 * Set/get/delete/rehash items (internal versions)
149 **********************************************************************/
150 static struct pppox_sock *__get_item(__be16 sid, unsigned char *addr, int ifindex)
152 int hash = hash_item(sid, addr);
153 struct pppox_sock *ret;
155 ret = item_hash_table[hash];
158 if (cmp_addr(&ret->pppoe_pa, sid, addr) &&
159 ret->pppoe_ifindex == ifindex)
168 static int __set_item(struct pppox_sock *po)
170 int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote);
171 struct pppox_sock *ret;
173 ret = item_hash_table[hash];
175 if (cmp_2_addr(&ret->pppoe_pa, &po->pppoe_pa) &&
176 ret->pppoe_ifindex == po->pppoe_ifindex)
182 po->next = item_hash_table[hash];
183 item_hash_table[hash] = po;
188 static struct pppox_sock *__delete_item(__be16 sid, char *addr, int ifindex)
190 int hash = hash_item(sid, addr);
191 struct pppox_sock *ret, **src;
193 ret = item_hash_table[hash];
194 src = &item_hash_table[hash];
197 if (cmp_addr(&ret->pppoe_pa, sid, addr) &&
198 ret->pppoe_ifindex == ifindex) {
210 /**********************************************************************
212 * Set/get/delete/rehash items
214 **********************************************************************/
215 static inline struct pppox_sock *get_item(__be16 sid,
216 unsigned char *addr, int ifindex)
218 struct pppox_sock *po;
220 read_lock_bh(&pppoe_hash_lock);
221 po = __get_item(sid, addr, ifindex);
223 sock_hold(sk_pppox(po));
224 read_unlock_bh(&pppoe_hash_lock);
229 static inline struct pppox_sock *get_item_by_addr(struct sockaddr_pppox *sp)
231 struct net_device *dev;
234 dev = dev_get_by_name(&init_net, sp->sa_addr.pppoe.dev);
237 ifindex = dev->ifindex;
239 return get_item(sp->sa_addr.pppoe.sid, sp->sa_addr.pppoe.remote, ifindex);
242 static inline struct pppox_sock *delete_item(__be16 sid, char *addr, int ifindex)
244 struct pppox_sock *ret;
246 write_lock_bh(&pppoe_hash_lock);
247 ret = __delete_item(sid, addr, ifindex);
248 write_unlock_bh(&pppoe_hash_lock);
255 /***************************************************************************
257 * Handler for device events.
258 * Certain device events require that sockets be unconnected.
260 **************************************************************************/
262 static void pppoe_flush_dev(struct net_device *dev)
267 write_lock_bh(&pppoe_hash_lock);
268 for (hash = 0; hash < PPPOE_HASH_SIZE; hash++) {
269 struct pppox_sock *po = item_hash_table[hash];
272 struct sock *sk = sk_pppox(po);
273 if (po->pppoe_dev != dev) {
277 po->pppoe_dev = NULL;
281 /* We always grab the socket lock, followed by the
282 * pppoe_hash_lock, in that order. Since we should
283 * hold the sock lock while doing any unbinding,
284 * we need to release the lock we're holding.
285 * Hold a reference to the sock so it doesn't disappear
286 * as we're jumping between locks.
291 write_unlock_bh(&pppoe_hash_lock);
294 if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND)) {
295 pppox_unbind_sock(sk);
296 sk->sk_state = PPPOX_ZOMBIE;
297 sk->sk_state_change(sk);
303 /* Restart scan at the beginning of this hash chain.
304 * While the lock was dropped the chain contents may
307 write_lock_bh(&pppoe_hash_lock);
308 po = item_hash_table[hash];
311 write_unlock_bh(&pppoe_hash_lock);
314 static int pppoe_device_event(struct notifier_block *this,
315 unsigned long event, void *ptr)
317 struct net_device *dev = (struct net_device *) ptr;
319 if (dev_net(dev) != &init_net)
322 /* Only look at sockets that are using this specific device. */
324 case NETDEV_CHANGEMTU:
325 /* A change in mtu is a bad thing, requiring
326 * LCP re-negotiation.
329 case NETDEV_GOING_DOWN:
331 /* Find every socket on this device and kill it. */
332 pppoe_flush_dev(dev);
343 static struct notifier_block pppoe_notifier = {
344 .notifier_call = pppoe_device_event,
347 /************************************************************************
349 * Do the real work of receiving a PPPoE Session frame.
351 ***********************************************************************/
352 static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb)
354 struct pppox_sock *po = pppox_sk(sk);
355 struct pppox_sock *relay_po;
357 if (sk->sk_state & PPPOX_BOUND) {
358 ppp_input(&po->chan, skb);
359 } else if (sk->sk_state & PPPOX_RELAY) {
360 relay_po = get_item_by_addr(&po->pppoe_relay);
362 if (relay_po == NULL)
365 if ((sk_pppox(relay_po)->sk_state & PPPOX_CONNECTED) == 0)
368 if (!__pppoe_xmit(sk_pppox(relay_po), skb))
371 if (sock_queue_rcv_skb(sk, skb))
375 return NET_RX_SUCCESS;
378 sock_put(sk_pppox(relay_po));
385 /************************************************************************
387 * Receive wrapper called in BH context.
389 ***********************************************************************/
390 static int pppoe_rcv(struct sk_buff *skb,
391 struct net_device *dev,
392 struct packet_type *pt,
393 struct net_device *orig_dev)
396 struct pppoe_hdr *ph;
397 struct pppox_sock *po;
400 skb = skb_share_check(skb, GFP_ATOMIC);
404 if (dev_net(dev) != &init_net)
407 if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr)))
411 len = ntohs(ph->length);
413 skb_pull_rcsum(skb, sizeof(*ph));
417 if (pskb_trim_rcsum(skb, len))
420 po = get_item(ph->sid, eth_hdr(skb)->h_source, dev->ifindex);
424 return sk_receive_skb(sk_pppox(po), skb, 0);
432 /************************************************************************
434 * Receive a PPPoE Discovery frame.
435 * This is solely for detection of PADT frames
437 ***********************************************************************/
438 static int pppoe_disc_rcv(struct sk_buff *skb,
439 struct net_device *dev,
440 struct packet_type *pt,
441 struct net_device *orig_dev)
444 struct pppoe_hdr *ph;
445 struct pppox_sock *po;
447 if (dev_net(dev) != &init_net)
450 skb = skb_share_check(skb, GFP_ATOMIC);
454 if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr)))
458 if (ph->code != PADT_CODE)
461 po = get_item(ph->sid, eth_hdr(skb)->h_source, dev->ifindex);
463 struct sock *sk = sk_pppox(po);
467 /* If the user has locked the socket, just ignore
468 * the packet. With the way two rcv protocols hook into
469 * one socket family type, we cannot (easily) distinguish
470 * what kind of SKB it is during backlog rcv.
472 if (sock_owned_by_user(sk) == 0) {
473 /* We're no longer connect at the PPPOE layer,
474 * and must wait for ppp channel to disconnect us.
476 sk->sk_state = PPPOX_ZOMBIE;
486 return NET_RX_SUCCESS; /* Lies... :-) */
489 static struct packet_type pppoes_ptype = {
490 .type = __constant_htons(ETH_P_PPP_SES),
494 static struct packet_type pppoed_ptype = {
495 .type = __constant_htons(ETH_P_PPP_DISC),
496 .func = pppoe_disc_rcv,
499 static struct proto pppoe_sk_proto = {
501 .owner = THIS_MODULE,
502 .obj_size = sizeof(struct pppox_sock),
505 /***********************************************************************
507 * Initialize a new struct sock.
509 **********************************************************************/
510 static int pppoe_create(struct net *net, struct socket *sock)
514 sk = sk_alloc(net, PF_PPPOX, GFP_KERNEL, &pppoe_sk_proto);
518 sock_init_data(sock, sk);
520 sock->state = SS_UNCONNECTED;
521 sock->ops = &pppoe_ops;
523 sk->sk_backlog_rcv = pppoe_rcv_core;
524 sk->sk_state = PPPOX_NONE;
525 sk->sk_type = SOCK_STREAM;
526 sk->sk_family = PF_PPPOX;
527 sk->sk_protocol = PX_PROTO_OE;
532 static int pppoe_release(struct socket *sock)
534 struct sock *sk = sock->sk;
535 struct pppox_sock *po;
541 if (sock_flag(sk, SOCK_DEAD)) {
546 pppox_unbind_sock(sk);
548 /* Signal the death of the socket. */
549 sk->sk_state = PPPOX_DEAD;
552 /* Write lock on hash lock protects the entire "po" struct from
553 * concurrent updates via pppoe_flush_dev. The "po" struct should
554 * be considered part of the hash table contents, thus protected
555 * by the hash table lock */
556 write_lock_bh(&pppoe_hash_lock);
559 if (stage_session(po->pppoe_pa.sid)) {
560 __delete_item(po->pppoe_pa.sid,
561 po->pppoe_pa.remote, po->pppoe_ifindex);
565 dev_put(po->pppoe_dev);
566 po->pppoe_dev = NULL;
569 write_unlock_bh(&pppoe_hash_lock);
574 skb_queue_purge(&sk->sk_receive_queue);
581 static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr,
582 int sockaddr_len, int flags)
584 struct sock *sk = sock->sk;
585 struct net_device *dev;
586 struct sockaddr_pppox *sp = (struct sockaddr_pppox *) uservaddr;
587 struct pppox_sock *po = pppox_sk(sk);
593 if (sp->sa_protocol != PX_PROTO_OE)
596 /* Check for already bound sockets */
598 if ((sk->sk_state & PPPOX_CONNECTED) &&
599 stage_session(sp->sa_addr.pppoe.sid))
602 /* Check for already disconnected sockets, on attempts to disconnect */
604 if ((sk->sk_state & PPPOX_DEAD) &&
605 !stage_session(sp->sa_addr.pppoe.sid))
610 /* Delete the old binding */
611 if (stage_session(po->pppoe_pa.sid)) {
612 pppox_unbind_sock(sk);
613 delete_item(po->pppoe_pa.sid, po->pppoe_pa.remote, po->pppoe_ifindex);
615 dev_put(po->pppoe_dev);
616 memset(sk_pppox(po) + 1, 0,
617 sizeof(struct pppox_sock) - sizeof(struct sock));
618 sk->sk_state = PPPOX_NONE;
621 /* Re-bind in session stage only */
622 if (stage_session(sp->sa_addr.pppoe.sid)) {
623 dev = dev_get_by_name(&init_net, sp->sa_addr.pppoe.dev);
630 po->pppoe_ifindex = dev->ifindex;
632 write_lock_bh(&pppoe_hash_lock);
633 if (!(dev->flags & IFF_UP)) {
634 write_unlock_bh(&pppoe_hash_lock);
638 memcpy(&po->pppoe_pa,
640 sizeof(struct pppoe_addr));
642 error = __set_item(po);
643 write_unlock_bh(&pppoe_hash_lock);
647 po->chan.hdrlen = (sizeof(struct pppoe_hdr) +
648 dev->hard_header_len);
650 po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr);
651 po->chan.private = sk;
652 po->chan.ops = &pppoe_chan_ops;
654 error = ppp_register_channel(&po->chan);
658 sk->sk_state = PPPOX_CONNECTED;
661 po->num = sp->sa_addr.pppoe.sid;
668 dev_put(po->pppoe_dev);
669 po->pppoe_dev = NULL;
674 static int pppoe_getname(struct socket *sock, struct sockaddr *uaddr,
675 int *usockaddr_len, int peer)
677 int len = sizeof(struct sockaddr_pppox);
678 struct sockaddr_pppox sp;
680 sp.sa_family = AF_PPPOX;
681 sp.sa_protocol = PX_PROTO_OE;
682 memcpy(&sp.sa_addr.pppoe, &pppox_sk(sock->sk)->pppoe_pa,
683 sizeof(struct pppoe_addr));
685 memcpy(uaddr, &sp, len);
687 *usockaddr_len = len;
692 static int pppoe_ioctl(struct socket *sock, unsigned int cmd,
695 struct sock *sk = sock->sk;
696 struct pppox_sock *po = pppox_sk(sk);
704 if (!(sk->sk_state & PPPOX_CONNECTED))
708 if (put_user(po->pppoe_dev->mtu -
709 sizeof(struct pppoe_hdr) -
718 if (!(sk->sk_state & PPPOX_CONNECTED))
722 if (get_user(val, (int __user *)arg))
725 if (val < (po->pppoe_dev->mtu
726 - sizeof(struct pppoe_hdr)
735 if (get_user(val, (int __user *)arg))
742 struct pppox_sock *relay_po;
745 if (sk->sk_state & (PPPOX_BOUND | PPPOX_ZOMBIE | PPPOX_DEAD))
749 if (!(sk->sk_state & PPPOX_CONNECTED))
752 /* PPPoE address from the user specifies an outbound
753 PPPoE address which frames are forwarded to */
755 if (copy_from_user(&po->pppoe_relay,
757 sizeof(struct sockaddr_pppox)))
761 if (po->pppoe_relay.sa_family != AF_PPPOX ||
762 po->pppoe_relay.sa_protocol != PX_PROTO_OE)
765 /* Check that the socket referenced by the address
767 relay_po = get_item_by_addr(&po->pppoe_relay);
772 sock_put(sk_pppox(relay_po));
773 sk->sk_state |= PPPOX_RELAY;
780 if (!(sk->sk_state & PPPOX_RELAY))
783 sk->sk_state &= ~PPPOX_RELAY;
794 static int pppoe_sendmsg(struct kiocb *iocb, struct socket *sock,
795 struct msghdr *m, size_t total_len)
798 struct sock *sk = sock->sk;
799 struct pppox_sock *po = pppox_sk(sk);
801 struct pppoe_hdr hdr;
802 struct pppoe_hdr *ph;
803 struct net_device *dev;
807 if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) {
820 if (total_len > (dev->mtu + dev->hard_header_len))
824 skb = sock_wmalloc(sk, total_len + dev->hard_header_len + 32,
831 /* Reserve space for headers. */
832 skb_reserve(skb, dev->hard_header_len);
833 skb_reset_network_header(skb);
837 skb->priority = sk->sk_priority;
838 skb->protocol = __constant_htons(ETH_P_PPP_SES);
840 ph = (struct pppoe_hdr *) skb_put(skb, total_len + sizeof(struct pppoe_hdr));
841 start = (char *) &ph->tag[0];
843 error = memcpy_fromiovec(start, m->msg_iov, total_len);
851 dev_hard_header(skb, dev, ETH_P_PPP_SES,
852 po->pppoe_pa.remote, NULL, total_len);
854 memcpy(ph, &hdr, sizeof(struct pppoe_hdr));
856 ph->length = htons(total_len);
865 /************************************************************************
867 * xmit function for internal use.
869 ***********************************************************************/
870 static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb)
872 struct pppox_sock *po = pppox_sk(sk);
873 struct net_device *dev = po->pppoe_dev;
874 struct pppoe_hdr *ph;
875 int data_len = skb->len;
877 if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED))
883 /* Copy the data if there is no space for the header or if it's
886 if (skb_cow_head(skb, sizeof(*ph) + dev->hard_header_len))
889 __skb_push(skb, sizeof(*ph));
890 skb_reset_network_header(skb);
897 ph->length = htons(data_len);
899 skb->protocol = __constant_htons(ETH_P_PPP_SES);
902 dev_hard_header(skb, dev, ETH_P_PPP_SES,
903 po->pppoe_pa.remote, NULL, data_len);
914 /************************************************************************
916 * xmit function called by generic PPP driver
917 * sends PPP frame over PPPoE socket
919 ***********************************************************************/
920 static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb)
922 struct sock *sk = (struct sock *) chan->private;
923 return __pppoe_xmit(sk, skb);
926 static struct ppp_channel_ops pppoe_chan_ops = {
927 .start_xmit = pppoe_xmit,
930 static int pppoe_recvmsg(struct kiocb *iocb, struct socket *sock,
931 struct msghdr *m, size_t total_len, int flags)
933 struct sock *sk = sock->sk;
937 if (sk->sk_state & PPPOX_BOUND) {
942 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
943 flags & MSG_DONTWAIT, &error);
951 total_len = min_t(size_t, total_len, skb->len);
952 error = skb_copy_datagram_iovec(skb, 0, m->msg_iov, total_len);
962 #ifdef CONFIG_PROC_FS
963 static int pppoe_seq_show(struct seq_file *seq, void *v)
965 struct pppox_sock *po;
968 if (v == SEQ_START_TOKEN) {
969 seq_puts(seq, "Id Address Device\n");
974 dev_name = po->pppoe_pa.dev;
976 seq_printf(seq, "%08X %pM %8s\n",
977 po->pppoe_pa.sid, po->pppoe_pa.remote, dev_name);
982 static __inline__ struct pppox_sock *pppoe_get_idx(loff_t pos)
984 struct pppox_sock *po;
987 for (i = 0; i < PPPOE_HASH_SIZE; i++) {
988 po = item_hash_table[i];
999 static void *pppoe_seq_start(struct seq_file *seq, loff_t *pos)
1000 __acquires(pppoe_hash_lock)
1004 read_lock_bh(&pppoe_hash_lock);
1005 return l ? pppoe_get_idx(--l) : SEQ_START_TOKEN;
1008 static void *pppoe_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1010 struct pppox_sock *po;
1013 if (v == SEQ_START_TOKEN) {
1014 po = pppoe_get_idx(0);
1021 int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote);
1023 while (++hash < PPPOE_HASH_SIZE) {
1024 po = item_hash_table[hash];
1033 static void pppoe_seq_stop(struct seq_file *seq, void *v)
1034 __releases(pppoe_hash_lock)
1036 read_unlock_bh(&pppoe_hash_lock);
1039 static const struct seq_operations pppoe_seq_ops = {
1040 .start = pppoe_seq_start,
1041 .next = pppoe_seq_next,
1042 .stop = pppoe_seq_stop,
1043 .show = pppoe_seq_show,
1046 static int pppoe_seq_open(struct inode *inode, struct file *file)
1048 return seq_open(file, &pppoe_seq_ops);
1051 static const struct file_operations pppoe_seq_fops = {
1052 .owner = THIS_MODULE,
1053 .open = pppoe_seq_open,
1055 .llseek = seq_lseek,
1056 .release = seq_release,
1059 static int __init pppoe_proc_init(void)
1061 struct proc_dir_entry *p;
1063 p = proc_net_fops_create(&init_net, "pppoe", S_IRUGO, &pppoe_seq_fops);
1068 #else /* CONFIG_PROC_FS */
1069 static inline int pppoe_proc_init(void) { return 0; }
1070 #endif /* CONFIG_PROC_FS */
1072 static const struct proto_ops pppoe_ops = {
1074 .owner = THIS_MODULE,
1075 .release = pppoe_release,
1076 .bind = sock_no_bind,
1077 .connect = pppoe_connect,
1078 .socketpair = sock_no_socketpair,
1079 .accept = sock_no_accept,
1080 .getname = pppoe_getname,
1081 .poll = datagram_poll,
1082 .listen = sock_no_listen,
1083 .shutdown = sock_no_shutdown,
1084 .setsockopt = sock_no_setsockopt,
1085 .getsockopt = sock_no_getsockopt,
1086 .sendmsg = pppoe_sendmsg,
1087 .recvmsg = pppoe_recvmsg,
1088 .mmap = sock_no_mmap,
1089 .ioctl = pppox_ioctl,
1092 static struct pppox_proto pppoe_proto = {
1093 .create = pppoe_create,
1094 .ioctl = pppoe_ioctl,
1095 .owner = THIS_MODULE,
1098 static int __init pppoe_init(void)
1100 int err = proto_register(&pppoe_sk_proto, 0);
1105 err = register_pppox_proto(PX_PROTO_OE, &pppoe_proto);
1107 goto out_unregister_pppoe_proto;
1109 err = pppoe_proc_init();
1111 goto out_unregister_pppox_proto;
1113 dev_add_pack(&pppoes_ptype);
1114 dev_add_pack(&pppoed_ptype);
1115 register_netdevice_notifier(&pppoe_notifier);
1118 out_unregister_pppox_proto:
1119 unregister_pppox_proto(PX_PROTO_OE);
1120 out_unregister_pppoe_proto:
1121 proto_unregister(&pppoe_sk_proto);
1125 static void __exit pppoe_exit(void)
1127 unregister_pppox_proto(PX_PROTO_OE);
1128 dev_remove_pack(&pppoes_ptype);
1129 dev_remove_pack(&pppoed_ptype);
1130 unregister_netdevice_notifier(&pppoe_notifier);
1131 remove_proc_entry("pppoe", init_net.proc_net);
1132 proto_unregister(&pppoe_sk_proto);
1135 module_init(pppoe_init);
1136 module_exit(pppoe_exit);
1138 MODULE_AUTHOR("Michal Ostrowski <mostrows@speakeasy.net>");
1139 MODULE_DESCRIPTION("PPP over Ethernet driver");
1140 MODULE_LICENSE("GPL");
1141 MODULE_ALIAS_NETPROTO(PF_PPPOX);