Merge branch 'staging/for_v3.4' into v4l_for_linus
[platform/adaptation/renesas_rcar/renesas_kernel.git] / net / phonet / pep.c
1 /*
2  * File: pep.c
3  *
4  * Phonet pipe protocol end point socket
5  *
6  * Copyright (C) 2008 Nokia Corporation.
7  *
8  * Author: RĂ©mi Denis-Courmont <remi.denis-courmont@nokia.com>
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License
12  * version 2 as published by the Free Software Foundation.
13  *
14  * This program is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  * General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22  * 02110-1301 USA
23  */
24
25 #include <linux/kernel.h>
26 #include <linux/slab.h>
27 #include <linux/socket.h>
28 #include <net/sock.h>
29 #include <net/tcp_states.h>
30 #include <asm/ioctls.h>
31
32 #include <linux/phonet.h>
33 #include <linux/module.h>
34 #include <net/phonet/phonet.h>
35 #include <net/phonet/pep.h>
36 #include <net/phonet/gprs.h>
37
38 /* sk_state values:
39  * TCP_CLOSE            sock not in use yet
40  * TCP_CLOSE_WAIT       disconnected pipe
41  * TCP_LISTEN           listening pipe endpoint
42  * TCP_SYN_RECV         connected pipe in disabled state
43  * TCP_ESTABLISHED      connected pipe in enabled state
44  *
45  * pep_sock locking:
46  *  - sk_state, hlist: sock lock needed
47  *  - listener: read only
48  *  - pipe_handle: read only
49  */
50
51 #define CREDITS_MAX     10
52 #define CREDITS_THR     7
53
54 #define pep_sb_size(s) (((s) + 5) & ~3) /* 2-bytes head, 32-bits aligned */
55
56 /* Get the next TLV sub-block. */
57 static unsigned char *pep_get_sb(struct sk_buff *skb, u8 *ptype, u8 *plen,
58                                         void *buf)
59 {
60         void *data = NULL;
61         struct {
62                 u8 sb_type;
63                 u8 sb_len;
64         } *ph, h;
65         int buflen = *plen;
66
67         ph = skb_header_pointer(skb, 0, 2, &h);
68         if (ph == NULL || ph->sb_len < 2 || !pskb_may_pull(skb, ph->sb_len))
69                 return NULL;
70         ph->sb_len -= 2;
71         *ptype = ph->sb_type;
72         *plen = ph->sb_len;
73
74         if (buflen > ph->sb_len)
75                 buflen = ph->sb_len;
76         data = skb_header_pointer(skb, 2, buflen, buf);
77         __skb_pull(skb, 2 + ph->sb_len);
78         return data;
79 }
80
81 static struct sk_buff *pep_alloc_skb(struct sock *sk, const void *payload,
82                                         int len, gfp_t priority)
83 {
84         struct sk_buff *skb = alloc_skb(MAX_PNPIPE_HEADER + len, priority);
85         if (!skb)
86                 return NULL;
87         skb_set_owner_w(skb, sk);
88
89         skb_reserve(skb, MAX_PNPIPE_HEADER);
90         __skb_put(skb, len);
91         skb_copy_to_linear_data(skb, payload, len);
92         __skb_push(skb, sizeof(struct pnpipehdr));
93         skb_reset_transport_header(skb);
94         return skb;
95 }
96
97 static int pep_reply(struct sock *sk, struct sk_buff *oskb, u8 code,
98                         const void *data, int len, gfp_t priority)
99 {
100         const struct pnpipehdr *oph = pnp_hdr(oskb);
101         struct pnpipehdr *ph;
102         struct sk_buff *skb;
103         struct sockaddr_pn peer;
104
105         skb = pep_alloc_skb(sk, data, len, priority);
106         if (!skb)
107                 return -ENOMEM;
108
109         ph = pnp_hdr(skb);
110         ph->utid = oph->utid;
111         ph->message_id = oph->message_id + 1; /* REQ -> RESP */
112         ph->pipe_handle = oph->pipe_handle;
113         ph->error_code = code;
114
115         pn_skb_get_src_sockaddr(oskb, &peer);
116         return pn_skb_send(sk, skb, &peer);
117 }
118
119 static int pep_indicate(struct sock *sk, u8 id, u8 code,
120                         const void *data, int len, gfp_t priority)
121 {
122         struct pep_sock *pn = pep_sk(sk);
123         struct pnpipehdr *ph;
124         struct sk_buff *skb;
125
126         skb = pep_alloc_skb(sk, data, len, priority);
127         if (!skb)
128                 return -ENOMEM;
129
130         ph = pnp_hdr(skb);
131         ph->utid = 0;
132         ph->message_id = id;
133         ph->pipe_handle = pn->pipe_handle;
134         ph->data[0] = code;
135         return pn_skb_send(sk, skb, NULL);
136 }
137
138 #define PAD 0x00
139
140 static int pipe_handler_request(struct sock *sk, u8 id, u8 code,
141                                 const void *data, int len)
142 {
143         struct pep_sock *pn = pep_sk(sk);
144         struct pnpipehdr *ph;
145         struct sk_buff *skb;
146
147         skb = pep_alloc_skb(sk, data, len, GFP_KERNEL);
148         if (!skb)
149                 return -ENOMEM;
150
151         ph = pnp_hdr(skb);
152         ph->utid = id; /* whatever */
153         ph->message_id = id;
154         ph->pipe_handle = pn->pipe_handle;
155         ph->data[0] = code;
156         return pn_skb_send(sk, skb, NULL);
157 }
158
159 static int pipe_handler_send_created_ind(struct sock *sk)
160 {
161         struct pep_sock *pn = pep_sk(sk);
162         u8 data[4] = {
163                 PN_PIPE_SB_NEGOTIATED_FC, pep_sb_size(2),
164                 pn->tx_fc, pn->rx_fc,
165         };
166
167         return pep_indicate(sk, PNS_PIPE_CREATED_IND, 1 /* sub-blocks */,
168                                 data, 4, GFP_ATOMIC);
169 }
170
171 static int pep_accept_conn(struct sock *sk, struct sk_buff *skb)
172 {
173         static const u8 data[20] = {
174                 PAD, PAD, PAD, 2 /* sub-blocks */,
175                 PN_PIPE_SB_REQUIRED_FC_TX, pep_sb_size(5), 3, PAD,
176                         PN_MULTI_CREDIT_FLOW_CONTROL,
177                         PN_ONE_CREDIT_FLOW_CONTROL,
178                         PN_LEGACY_FLOW_CONTROL,
179                         PAD,
180                 PN_PIPE_SB_PREFERRED_FC_RX, pep_sb_size(5), 3, PAD,
181                         PN_MULTI_CREDIT_FLOW_CONTROL,
182                         PN_ONE_CREDIT_FLOW_CONTROL,
183                         PN_LEGACY_FLOW_CONTROL,
184                         PAD,
185         };
186
187         might_sleep();
188         return pep_reply(sk, skb, PN_PIPE_NO_ERROR, data, sizeof(data),
189                                 GFP_KERNEL);
190 }
191
192 static int pep_reject_conn(struct sock *sk, struct sk_buff *skb, u8 code,
193                                 gfp_t priority)
194 {
195         static const u8 data[4] = { PAD, PAD, PAD, 0 /* sub-blocks */ };
196         WARN_ON(code == PN_PIPE_NO_ERROR);
197         return pep_reply(sk, skb, code, data, sizeof(data), priority);
198 }
199
200 /* Control requests are not sent by the pipe service and have a specific
201  * message format. */
202 static int pep_ctrlreq_error(struct sock *sk, struct sk_buff *oskb, u8 code,
203                                 gfp_t priority)
204 {
205         const struct pnpipehdr *oph = pnp_hdr(oskb);
206         struct sk_buff *skb;
207         struct pnpipehdr *ph;
208         struct sockaddr_pn dst;
209         u8 data[4] = {
210                 oph->data[0], /* PEP type */
211                 code, /* error code, at an unusual offset */
212                 PAD, PAD,
213         };
214
215         skb = pep_alloc_skb(sk, data, 4, priority);
216         if (!skb)
217                 return -ENOMEM;
218
219         ph = pnp_hdr(skb);
220         ph->utid = oph->utid;
221         ph->message_id = PNS_PEP_CTRL_RESP;
222         ph->pipe_handle = oph->pipe_handle;
223         ph->data[0] = oph->data[1]; /* CTRL id */
224
225         pn_skb_get_src_sockaddr(oskb, &dst);
226         return pn_skb_send(sk, skb, &dst);
227 }
228
229 static int pipe_snd_status(struct sock *sk, u8 type, u8 status, gfp_t priority)
230 {
231         u8 data[4] = { type, PAD, PAD, status };
232
233         return pep_indicate(sk, PNS_PEP_STATUS_IND, PN_PEP_TYPE_COMMON,
234                                 data, 4, priority);
235 }
236
237 /* Send our RX flow control information to the sender.
238  * Socket must be locked. */
239 static void pipe_grant_credits(struct sock *sk, gfp_t priority)
240 {
241         struct pep_sock *pn = pep_sk(sk);
242
243         BUG_ON(sk->sk_state != TCP_ESTABLISHED);
244
245         switch (pn->rx_fc) {
246         case PN_LEGACY_FLOW_CONTROL: /* TODO */
247                 break;
248         case PN_ONE_CREDIT_FLOW_CONTROL:
249                 if (pipe_snd_status(sk, PN_PEP_IND_FLOW_CONTROL,
250                                         PEP_IND_READY, priority) == 0)
251                         pn->rx_credits = 1;
252                 break;
253         case PN_MULTI_CREDIT_FLOW_CONTROL:
254                 if ((pn->rx_credits + CREDITS_THR) > CREDITS_MAX)
255                         break;
256                 if (pipe_snd_status(sk, PN_PEP_IND_ID_MCFC_GRANT_CREDITS,
257                                         CREDITS_MAX - pn->rx_credits,
258                                         priority) == 0)
259                         pn->rx_credits = CREDITS_MAX;
260                 break;
261         }
262 }
263
264 static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb)
265 {
266         struct pep_sock *pn = pep_sk(sk);
267         struct pnpipehdr *hdr;
268         int wake = 0;
269
270         if (!pskb_may_pull(skb, sizeof(*hdr) + 4))
271                 return -EINVAL;
272
273         hdr = pnp_hdr(skb);
274         if (hdr->data[0] != PN_PEP_TYPE_COMMON) {
275                 LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP type: %u\n",
276                                 (unsigned)hdr->data[0]);
277                 return -EOPNOTSUPP;
278         }
279
280         switch (hdr->data[1]) {
281         case PN_PEP_IND_FLOW_CONTROL:
282                 switch (pn->tx_fc) {
283                 case PN_LEGACY_FLOW_CONTROL:
284                         switch (hdr->data[4]) {
285                         case PEP_IND_BUSY:
286                                 atomic_set(&pn->tx_credits, 0);
287                                 break;
288                         case PEP_IND_READY:
289                                 atomic_set(&pn->tx_credits, wake = 1);
290                                 break;
291                         }
292                         break;
293                 case PN_ONE_CREDIT_FLOW_CONTROL:
294                         if (hdr->data[4] == PEP_IND_READY)
295                                 atomic_set(&pn->tx_credits, wake = 1);
296                         break;
297                 }
298                 break;
299
300         case PN_PEP_IND_ID_MCFC_GRANT_CREDITS:
301                 if (pn->tx_fc != PN_MULTI_CREDIT_FLOW_CONTROL)
302                         break;
303                 atomic_add(wake = hdr->data[4], &pn->tx_credits);
304                 break;
305
306         default:
307                 LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP indication: %u\n",
308                                 (unsigned)hdr->data[1]);
309                 return -EOPNOTSUPP;
310         }
311         if (wake)
312                 sk->sk_write_space(sk);
313         return 0;
314 }
315
316 static int pipe_rcv_created(struct sock *sk, struct sk_buff *skb)
317 {
318         struct pep_sock *pn = pep_sk(sk);
319         struct pnpipehdr *hdr = pnp_hdr(skb);
320         u8 n_sb = hdr->data[0];
321
322         pn->rx_fc = pn->tx_fc = PN_LEGACY_FLOW_CONTROL;
323         __skb_pull(skb, sizeof(*hdr));
324         while (n_sb > 0) {
325                 u8 type, buf[2], len = sizeof(buf);
326                 u8 *data = pep_get_sb(skb, &type, &len, buf);
327
328                 if (data == NULL)
329                         return -EINVAL;
330                 switch (type) {
331                 case PN_PIPE_SB_NEGOTIATED_FC:
332                         if (len < 2 || (data[0] | data[1]) > 3)
333                                 break;
334                         pn->tx_fc = data[0] & 3;
335                         pn->rx_fc = data[1] & 3;
336                         break;
337                 }
338                 n_sb--;
339         }
340         return 0;
341 }
342
343 /* Queue an skb to a connected sock.
344  * Socket lock must be held. */
345 static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
346 {
347         struct pep_sock *pn = pep_sk(sk);
348         struct pnpipehdr *hdr = pnp_hdr(skb);
349         struct sk_buff_head *queue;
350         int err = 0;
351
352         BUG_ON(sk->sk_state == TCP_CLOSE_WAIT);
353
354         switch (hdr->message_id) {
355         case PNS_PEP_CONNECT_REQ:
356                 pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE, GFP_ATOMIC);
357                 break;
358
359         case PNS_PEP_DISCONNECT_REQ:
360                 pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
361                 sk->sk_state = TCP_CLOSE_WAIT;
362                 if (!sock_flag(sk, SOCK_DEAD))
363                         sk->sk_state_change(sk);
364                 break;
365
366         case PNS_PEP_ENABLE_REQ:
367                 /* Wait for PNS_PIPE_(ENABLED|REDIRECTED)_IND */
368                 pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
369                 break;
370
371         case PNS_PEP_RESET_REQ:
372                 switch (hdr->state_after_reset) {
373                 case PN_PIPE_DISABLE:
374                         pn->init_enable = 0;
375                         break;
376                 case PN_PIPE_ENABLE:
377                         pn->init_enable = 1;
378                         break;
379                 default: /* not allowed to send an error here!? */
380                         err = -EINVAL;
381                         goto out;
382                 }
383                 /* fall through */
384         case PNS_PEP_DISABLE_REQ:
385                 atomic_set(&pn->tx_credits, 0);
386                 pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
387                 break;
388
389         case PNS_PEP_CTRL_REQ:
390                 if (skb_queue_len(&pn->ctrlreq_queue) >= PNPIPE_CTRLREQ_MAX) {
391                         atomic_inc(&sk->sk_drops);
392                         break;
393                 }
394                 __skb_pull(skb, 4);
395                 queue = &pn->ctrlreq_queue;
396                 goto queue;
397
398         case PNS_PIPE_ALIGNED_DATA:
399                 __skb_pull(skb, 1);
400                 /* fall through */
401         case PNS_PIPE_DATA:
402                 __skb_pull(skb, 3); /* Pipe data header */
403                 if (!pn_flow_safe(pn->rx_fc)) {
404                         err = sock_queue_rcv_skb(sk, skb);
405                         if (!err)
406                                 return NET_RX_SUCCESS;
407                         err = -ENOBUFS;
408                         break;
409                 }
410
411                 if (pn->rx_credits == 0) {
412                         atomic_inc(&sk->sk_drops);
413                         err = -ENOBUFS;
414                         break;
415                 }
416                 pn->rx_credits--;
417                 queue = &sk->sk_receive_queue;
418                 goto queue;
419
420         case PNS_PEP_STATUS_IND:
421                 pipe_rcv_status(sk, skb);
422                 break;
423
424         case PNS_PIPE_REDIRECTED_IND:
425                 err = pipe_rcv_created(sk, skb);
426                 break;
427
428         case PNS_PIPE_CREATED_IND:
429                 err = pipe_rcv_created(sk, skb);
430                 if (err)
431                         break;
432                 /* fall through */
433         case PNS_PIPE_RESET_IND:
434                 if (!pn->init_enable)
435                         break;
436                 /* fall through */
437         case PNS_PIPE_ENABLED_IND:
438                 if (!pn_flow_safe(pn->tx_fc)) {
439                         atomic_set(&pn->tx_credits, 1);
440                         sk->sk_write_space(sk);
441                 }
442                 if (sk->sk_state == TCP_ESTABLISHED)
443                         break; /* Nothing to do */
444                 sk->sk_state = TCP_ESTABLISHED;
445                 pipe_grant_credits(sk, GFP_ATOMIC);
446                 break;
447
448         case PNS_PIPE_DISABLED_IND:
449                 sk->sk_state = TCP_SYN_RECV;
450                 pn->rx_credits = 0;
451                 break;
452
453         default:
454                 LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP message: %u\n",
455                                 hdr->message_id);
456                 err = -EINVAL;
457         }
458 out:
459         kfree_skb(skb);
460         return (err == -ENOBUFS) ? NET_RX_DROP : NET_RX_SUCCESS;
461
462 queue:
463         skb->dev = NULL;
464         skb_set_owner_r(skb, sk);
465         err = skb->len;
466         skb_queue_tail(queue, skb);
467         if (!sock_flag(sk, SOCK_DEAD))
468                 sk->sk_data_ready(sk, err);
469         return NET_RX_SUCCESS;
470 }
471
472 /* Destroy connected sock. */
473 static void pipe_destruct(struct sock *sk)
474 {
475         struct pep_sock *pn = pep_sk(sk);
476
477         skb_queue_purge(&sk->sk_receive_queue);
478         skb_queue_purge(&pn->ctrlreq_queue);
479 }
480
481 static u8 pipe_negotiate_fc(const u8 *fcs, unsigned n)
482 {
483         unsigned i;
484         u8 final_fc = PN_NO_FLOW_CONTROL;
485
486         for (i = 0; i < n; i++) {
487                 u8 fc = fcs[i];
488
489                 if (fc > final_fc && fc < PN_MAX_FLOW_CONTROL)
490                         final_fc = fc;
491         }
492         return final_fc;
493 }
494
495 static int pep_connresp_rcv(struct sock *sk, struct sk_buff *skb)
496 {
497         struct pep_sock *pn = pep_sk(sk);
498         struct pnpipehdr *hdr;
499         u8 n_sb;
500
501         if (!pskb_pull(skb, sizeof(*hdr) + 4))
502                 return -EINVAL;
503
504         hdr = pnp_hdr(skb);
505         if (hdr->error_code != PN_PIPE_NO_ERROR)
506                 return -ECONNREFUSED;
507
508         /* Parse sub-blocks */
509         n_sb = hdr->data[4];
510         while (n_sb > 0) {
511                 u8 type, buf[6], len = sizeof(buf);
512                 const u8 *data = pep_get_sb(skb, &type, &len, buf);
513
514                 if (data == NULL)
515                         return -EINVAL;
516
517                 switch (type) {
518                 case PN_PIPE_SB_REQUIRED_FC_TX:
519                         if (len < 2 || len < data[0])
520                                 break;
521                         pn->tx_fc = pipe_negotiate_fc(data + 2, len - 2);
522                         break;
523
524                 case PN_PIPE_SB_PREFERRED_FC_RX:
525                         if (len < 2 || len < data[0])
526                                 break;
527                         pn->rx_fc = pipe_negotiate_fc(data + 2, len - 2);
528                         break;
529
530                 }
531                 n_sb--;
532         }
533
534         return pipe_handler_send_created_ind(sk);
535 }
536
537 static int pep_enableresp_rcv(struct sock *sk, struct sk_buff *skb)
538 {
539         struct pnpipehdr *hdr = pnp_hdr(skb);
540
541         if (hdr->error_code != PN_PIPE_NO_ERROR)
542                 return -ECONNREFUSED;
543
544         return pep_indicate(sk, PNS_PIPE_ENABLED_IND, 0 /* sub-blocks */,
545                 NULL, 0, GFP_ATOMIC);
546
547 }
548
549 static void pipe_start_flow_control(struct sock *sk)
550 {
551         struct pep_sock *pn = pep_sk(sk);
552
553         if (!pn_flow_safe(pn->tx_fc)) {
554                 atomic_set(&pn->tx_credits, 1);
555                 sk->sk_write_space(sk);
556         }
557         pipe_grant_credits(sk, GFP_ATOMIC);
558 }
559
560 /* Queue an skb to an actively connected sock.
561  * Socket lock must be held. */
562 static int pipe_handler_do_rcv(struct sock *sk, struct sk_buff *skb)
563 {
564         struct pep_sock *pn = pep_sk(sk);
565         struct pnpipehdr *hdr = pnp_hdr(skb);
566         int err = NET_RX_SUCCESS;
567
568         switch (hdr->message_id) {
569         case PNS_PIPE_ALIGNED_DATA:
570                 __skb_pull(skb, 1);
571                 /* fall through */
572         case PNS_PIPE_DATA:
573                 __skb_pull(skb, 3); /* Pipe data header */
574                 if (!pn_flow_safe(pn->rx_fc)) {
575                         err = sock_queue_rcv_skb(sk, skb);
576                         if (!err)
577                                 return NET_RX_SUCCESS;
578                         err = NET_RX_DROP;
579                         break;
580                 }
581
582                 if (pn->rx_credits == 0) {
583                         atomic_inc(&sk->sk_drops);
584                         err = NET_RX_DROP;
585                         break;
586                 }
587                 pn->rx_credits--;
588                 skb->dev = NULL;
589                 skb_set_owner_r(skb, sk);
590                 err = skb->len;
591                 skb_queue_tail(&sk->sk_receive_queue, skb);
592                 if (!sock_flag(sk, SOCK_DEAD))
593                         sk->sk_data_ready(sk, err);
594                 return NET_RX_SUCCESS;
595
596         case PNS_PEP_CONNECT_RESP:
597                 if (sk->sk_state != TCP_SYN_SENT)
598                         break;
599                 if (!sock_flag(sk, SOCK_DEAD))
600                         sk->sk_state_change(sk);
601                 if (pep_connresp_rcv(sk, skb)) {
602                         sk->sk_state = TCP_CLOSE_WAIT;
603                         break;
604                 }
605                 if (pn->init_enable == PN_PIPE_DISABLE)
606                         sk->sk_state = TCP_SYN_RECV;
607                 else {
608                         sk->sk_state = TCP_ESTABLISHED;
609                         pipe_start_flow_control(sk);
610                 }
611                 break;
612
613         case PNS_PEP_ENABLE_RESP:
614                 if (sk->sk_state != TCP_SYN_SENT)
615                         break;
616
617                 if (pep_enableresp_rcv(sk, skb)) {
618                         sk->sk_state = TCP_CLOSE_WAIT;
619                         break;
620                 }
621
622                 sk->sk_state = TCP_ESTABLISHED;
623                 pipe_start_flow_control(sk);
624                 break;
625
626         case PNS_PEP_DISCONNECT_RESP:
627                 /* sock should already be dead, nothing to do */
628                 break;
629
630         case PNS_PEP_STATUS_IND:
631                 pipe_rcv_status(sk, skb);
632                 break;
633         }
634         kfree_skb(skb);
635         return err;
636 }
637
638 /* Listening sock must be locked */
639 static struct sock *pep_find_pipe(const struct hlist_head *hlist,
640                                         const struct sockaddr_pn *dst,
641                                         u8 pipe_handle)
642 {
643         struct hlist_node *node;
644         struct sock *sknode;
645         u16 dobj = pn_sockaddr_get_object(dst);
646
647         sk_for_each(sknode, node, hlist) {
648                 struct pep_sock *pnnode = pep_sk(sknode);
649
650                 /* Ports match, but addresses might not: */
651                 if (pnnode->pn_sk.sobject != dobj)
652                         continue;
653                 if (pnnode->pipe_handle != pipe_handle)
654                         continue;
655                 if (sknode->sk_state == TCP_CLOSE_WAIT)
656                         continue;
657
658                 sock_hold(sknode);
659                 return sknode;
660         }
661         return NULL;
662 }
663
664 /*
665  * Deliver an skb to a listening sock.
666  * Socket lock must be held.
667  * We then queue the skb to the right connected sock (if any).
668  */
669 static int pep_do_rcv(struct sock *sk, struct sk_buff *skb)
670 {
671         struct pep_sock *pn = pep_sk(sk);
672         struct sock *sknode;
673         struct pnpipehdr *hdr;
674         struct sockaddr_pn dst;
675         u8 pipe_handle;
676
677         if (!pskb_may_pull(skb, sizeof(*hdr)))
678                 goto drop;
679
680         hdr = pnp_hdr(skb);
681         pipe_handle = hdr->pipe_handle;
682         if (pipe_handle == PN_PIPE_INVALID_HANDLE)
683                 goto drop;
684
685         pn_skb_get_dst_sockaddr(skb, &dst);
686
687         /* Look for an existing pipe handle */
688         sknode = pep_find_pipe(&pn->hlist, &dst, pipe_handle);
689         if (sknode)
690                 return sk_receive_skb(sknode, skb, 1);
691
692         switch (hdr->message_id) {
693         case PNS_PEP_CONNECT_REQ:
694                 if (sk->sk_state != TCP_LISTEN || sk_acceptq_is_full(sk)) {
695                         pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE,
696                                         GFP_ATOMIC);
697                         break;
698                 }
699                 skb_queue_head(&sk->sk_receive_queue, skb);
700                 sk_acceptq_added(sk);
701                 if (!sock_flag(sk, SOCK_DEAD))
702                         sk->sk_data_ready(sk, 0);
703                 return NET_RX_SUCCESS;
704
705         case PNS_PEP_DISCONNECT_REQ:
706                 pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
707                 break;
708
709         case PNS_PEP_CTRL_REQ:
710                 pep_ctrlreq_error(sk, skb, PN_PIPE_INVALID_HANDLE, GFP_ATOMIC);
711                 break;
712
713         case PNS_PEP_RESET_REQ:
714         case PNS_PEP_ENABLE_REQ:
715         case PNS_PEP_DISABLE_REQ:
716                 /* invalid handle is not even allowed here! */
717                 break;
718
719         default:
720                 if ((1 << sk->sk_state)
721                                 & ~(TCPF_CLOSE|TCPF_LISTEN|TCPF_CLOSE_WAIT))
722                         /* actively connected socket */
723                         return pipe_handler_do_rcv(sk, skb);
724         }
725 drop:
726         kfree_skb(skb);
727         return NET_RX_SUCCESS;
728 }
729
730 static int pipe_do_remove(struct sock *sk)
731 {
732         struct pep_sock *pn = pep_sk(sk);
733         struct pnpipehdr *ph;
734         struct sk_buff *skb;
735
736         skb = pep_alloc_skb(sk, NULL, 0, GFP_KERNEL);
737         if (!skb)
738                 return -ENOMEM;
739
740         ph = pnp_hdr(skb);
741         ph->utid = 0;
742         ph->message_id = PNS_PIPE_REMOVE_REQ;
743         ph->pipe_handle = pn->pipe_handle;
744         ph->data[0] = PAD;
745         return pn_skb_send(sk, skb, NULL);
746 }
747
748 /* associated socket ceases to exist */
749 static void pep_sock_close(struct sock *sk, long timeout)
750 {
751         struct pep_sock *pn = pep_sk(sk);
752         int ifindex = 0;
753
754         sock_hold(sk); /* keep a reference after sk_common_release() */
755         sk_common_release(sk);
756
757         lock_sock(sk);
758         if ((1 << sk->sk_state) & (TCPF_SYN_RECV|TCPF_ESTABLISHED)) {
759                 if (sk->sk_backlog_rcv == pipe_do_rcv)
760                         /* Forcefully remove dangling Phonet pipe */
761                         pipe_do_remove(sk);
762                 else
763                         pipe_handler_request(sk, PNS_PEP_DISCONNECT_REQ, PAD,
764                                                 NULL, 0);
765         }
766         sk->sk_state = TCP_CLOSE;
767
768         ifindex = pn->ifindex;
769         pn->ifindex = 0;
770         release_sock(sk);
771
772         if (ifindex)
773                 gprs_detach(sk);
774         sock_put(sk);
775 }
776
777 static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp)
778 {
779         struct pep_sock *pn = pep_sk(sk), *newpn;
780         struct sock *newsk = NULL;
781         struct sk_buff *skb;
782         struct pnpipehdr *hdr;
783         struct sockaddr_pn dst, src;
784         int err;
785         u16 peer_type;
786         u8 pipe_handle, enabled, n_sb;
787         u8 aligned = 0;
788
789         skb = skb_recv_datagram(sk, 0, flags & O_NONBLOCK, errp);
790         if (!skb)
791                 return NULL;
792
793         lock_sock(sk);
794         if (sk->sk_state != TCP_LISTEN) {
795                 err = -EINVAL;
796                 goto drop;
797         }
798         sk_acceptq_removed(sk);
799
800         err = -EPROTO;
801         if (!pskb_may_pull(skb, sizeof(*hdr) + 4))
802                 goto drop;
803
804         hdr = pnp_hdr(skb);
805         pipe_handle = hdr->pipe_handle;
806         switch (hdr->state_after_connect) {
807         case PN_PIPE_DISABLE:
808                 enabled = 0;
809                 break;
810         case PN_PIPE_ENABLE:
811                 enabled = 1;
812                 break;
813         default:
814                 pep_reject_conn(sk, skb, PN_PIPE_ERR_INVALID_PARAM,
815                                 GFP_KERNEL);
816                 goto drop;
817         }
818         peer_type = hdr->other_pep_type << 8;
819
820         /* Parse sub-blocks (options) */
821         n_sb = hdr->data[4];
822         while (n_sb > 0) {
823                 u8 type, buf[1], len = sizeof(buf);
824                 const u8 *data = pep_get_sb(skb, &type, &len, buf);
825
826                 if (data == NULL)
827                         goto drop;
828                 switch (type) {
829                 case PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE:
830                         if (len < 1)
831                                 goto drop;
832                         peer_type = (peer_type & 0xff00) | data[0];
833                         break;
834                 case PN_PIPE_SB_ALIGNED_DATA:
835                         aligned = data[0] != 0;
836                         break;
837                 }
838                 n_sb--;
839         }
840
841         /* Check for duplicate pipe handle */
842         newsk = pep_find_pipe(&pn->hlist, &dst, pipe_handle);
843         if (unlikely(newsk)) {
844                 __sock_put(newsk);
845                 newsk = NULL;
846                 pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE, GFP_KERNEL);
847                 goto drop;
848         }
849
850         /* Create a new to-be-accepted sock */
851         newsk = sk_alloc(sock_net(sk), PF_PHONET, GFP_KERNEL, sk->sk_prot);
852         if (!newsk) {
853                 pep_reject_conn(sk, skb, PN_PIPE_ERR_OVERLOAD, GFP_KERNEL);
854                 err = -ENOBUFS;
855                 goto drop;
856         }
857
858         sock_init_data(NULL, newsk);
859         newsk->sk_state = TCP_SYN_RECV;
860         newsk->sk_backlog_rcv = pipe_do_rcv;
861         newsk->sk_protocol = sk->sk_protocol;
862         newsk->sk_destruct = pipe_destruct;
863
864         newpn = pep_sk(newsk);
865         pn_skb_get_dst_sockaddr(skb, &dst);
866         pn_skb_get_src_sockaddr(skb, &src);
867         newpn->pn_sk.sobject = pn_sockaddr_get_object(&dst);
868         newpn->pn_sk.dobject = pn_sockaddr_get_object(&src);
869         newpn->pn_sk.resource = pn_sockaddr_get_resource(&dst);
870         sock_hold(sk);
871         newpn->listener = sk;
872         skb_queue_head_init(&newpn->ctrlreq_queue);
873         newpn->pipe_handle = pipe_handle;
874         atomic_set(&newpn->tx_credits, 0);
875         newpn->ifindex = 0;
876         newpn->peer_type = peer_type;
877         newpn->rx_credits = 0;
878         newpn->rx_fc = newpn->tx_fc = PN_LEGACY_FLOW_CONTROL;
879         newpn->init_enable = enabled;
880         newpn->aligned = aligned;
881
882         err = pep_accept_conn(newsk, skb);
883         if (err) {
884                 sock_put(newsk);
885                 newsk = NULL;
886                 goto drop;
887         }
888         sk_add_node(newsk, &pn->hlist);
889 drop:
890         release_sock(sk);
891         kfree_skb(skb);
892         *errp = err;
893         return newsk;
894 }
895
896 static int pep_sock_connect(struct sock *sk, struct sockaddr *addr, int len)
897 {
898         struct pep_sock *pn = pep_sk(sk);
899         int err;
900         u8 data[4] = { 0 /* sub-blocks */, PAD, PAD, PAD };
901
902         if (pn->pipe_handle == PN_PIPE_INVALID_HANDLE)
903                 pn->pipe_handle = 1; /* anything but INVALID_HANDLE */
904
905         err = pipe_handler_request(sk, PNS_PEP_CONNECT_REQ,
906                                 pn->init_enable, data, 4);
907         if (err) {
908                 pn->pipe_handle = PN_PIPE_INVALID_HANDLE;
909                 return err;
910         }
911
912         sk->sk_state = TCP_SYN_SENT;
913
914         return 0;
915 }
916
917 static int pep_sock_enable(struct sock *sk, struct sockaddr *addr, int len)
918 {
919         int err;
920
921         err = pipe_handler_request(sk, PNS_PEP_ENABLE_REQ, PAD,
922                                 NULL, 0);
923         if (err)
924                 return err;
925
926         sk->sk_state = TCP_SYN_SENT;
927
928         return 0;
929 }
930
931 static int pep_ioctl(struct sock *sk, int cmd, unsigned long arg)
932 {
933         struct pep_sock *pn = pep_sk(sk);
934         int answ;
935         int ret = -ENOIOCTLCMD;
936
937         switch (cmd) {
938         case SIOCINQ:
939                 if (sk->sk_state == TCP_LISTEN) {
940                         ret = -EINVAL;
941                         break;
942                 }
943
944                 lock_sock(sk);
945                 if (sock_flag(sk, SOCK_URGINLINE) &&
946                     !skb_queue_empty(&pn->ctrlreq_queue))
947                         answ = skb_peek(&pn->ctrlreq_queue)->len;
948                 else if (!skb_queue_empty(&sk->sk_receive_queue))
949                         answ = skb_peek(&sk->sk_receive_queue)->len;
950                 else
951                         answ = 0;
952                 release_sock(sk);
953                 ret = put_user(answ, (int __user *)arg);
954                 break;
955
956         case SIOCPNENABLEPIPE:
957                 lock_sock(sk);
958                 if (sk->sk_state == TCP_SYN_SENT)
959                         ret =  -EBUSY;
960                 else if (sk->sk_state == TCP_ESTABLISHED)
961                         ret = -EISCONN;
962                 else
963                         ret = pep_sock_enable(sk, NULL, 0);
964                 release_sock(sk);
965                 break;
966         }
967
968         return ret;
969 }
970
971 static int pep_init(struct sock *sk)
972 {
973         struct pep_sock *pn = pep_sk(sk);
974
975         sk->sk_destruct = pipe_destruct;
976         INIT_HLIST_HEAD(&pn->hlist);
977         pn->listener = NULL;
978         skb_queue_head_init(&pn->ctrlreq_queue);
979         atomic_set(&pn->tx_credits, 0);
980         pn->ifindex = 0;
981         pn->peer_type = 0;
982         pn->pipe_handle = PN_PIPE_INVALID_HANDLE;
983         pn->rx_credits = 0;
984         pn->rx_fc = pn->tx_fc = PN_LEGACY_FLOW_CONTROL;
985         pn->init_enable = 1;
986         pn->aligned = 0;
987         return 0;
988 }
989
990 static int pep_setsockopt(struct sock *sk, int level, int optname,
991                                 char __user *optval, unsigned int optlen)
992 {
993         struct pep_sock *pn = pep_sk(sk);
994         int val = 0, err = 0;
995
996         if (level != SOL_PNPIPE)
997                 return -ENOPROTOOPT;
998         if (optlen >= sizeof(int)) {
999                 if (get_user(val, (int __user *) optval))
1000                         return -EFAULT;
1001         }
1002
1003         lock_sock(sk);
1004         switch (optname) {
1005         case PNPIPE_ENCAP:
1006                 if (val && val != PNPIPE_ENCAP_IP) {
1007                         err = -EINVAL;
1008                         break;
1009                 }
1010                 if (!pn->ifindex == !val)
1011                         break; /* Nothing to do! */
1012                 if (!capable(CAP_NET_ADMIN)) {
1013                         err = -EPERM;
1014                         break;
1015                 }
1016                 if (val) {
1017                         release_sock(sk);
1018                         err = gprs_attach(sk);
1019                         if (err > 0) {
1020                                 pn->ifindex = err;
1021                                 err = 0;
1022                         }
1023                 } else {
1024                         pn->ifindex = 0;
1025                         release_sock(sk);
1026                         gprs_detach(sk);
1027                         err = 0;
1028                 }
1029                 goto out_norel;
1030
1031         case PNPIPE_HANDLE:
1032                 if ((sk->sk_state == TCP_CLOSE) &&
1033                         (val >= 0) && (val < PN_PIPE_INVALID_HANDLE))
1034                         pn->pipe_handle = val;
1035                 else
1036                         err = -EINVAL;
1037                 break;
1038
1039         case PNPIPE_INITSTATE:
1040                 pn->init_enable = !!val;
1041                 break;
1042
1043         default:
1044                 err = -ENOPROTOOPT;
1045         }
1046         release_sock(sk);
1047
1048 out_norel:
1049         return err;
1050 }
1051
1052 static int pep_getsockopt(struct sock *sk, int level, int optname,
1053                                 char __user *optval, int __user *optlen)
1054 {
1055         struct pep_sock *pn = pep_sk(sk);
1056         int len, val;
1057
1058         if (level != SOL_PNPIPE)
1059                 return -ENOPROTOOPT;
1060         if (get_user(len, optlen))
1061                 return -EFAULT;
1062
1063         switch (optname) {
1064         case PNPIPE_ENCAP:
1065                 val = pn->ifindex ? PNPIPE_ENCAP_IP : PNPIPE_ENCAP_NONE;
1066                 break;
1067
1068         case PNPIPE_IFINDEX:
1069                 val = pn->ifindex;
1070                 break;
1071
1072         case PNPIPE_HANDLE:
1073                 val = pn->pipe_handle;
1074                 if (val == PN_PIPE_INVALID_HANDLE)
1075                         return -EINVAL;
1076                 break;
1077
1078         case PNPIPE_INITSTATE:
1079                 val = pn->init_enable;
1080                 break;
1081
1082         default:
1083                 return -ENOPROTOOPT;
1084         }
1085
1086         len = min_t(unsigned int, sizeof(int), len);
1087         if (put_user(len, optlen))
1088                 return -EFAULT;
1089         if (put_user(val, (int __user *) optval))
1090                 return -EFAULT;
1091         return 0;
1092 }
1093
1094 static int pipe_skb_send(struct sock *sk, struct sk_buff *skb)
1095 {
1096         struct pep_sock *pn = pep_sk(sk);
1097         struct pnpipehdr *ph;
1098         int err;
1099
1100         if (pn_flow_safe(pn->tx_fc) &&
1101             !atomic_add_unless(&pn->tx_credits, -1, 0)) {
1102                 kfree_skb(skb);
1103                 return -ENOBUFS;
1104         }
1105
1106         skb_push(skb, 3 + pn->aligned);
1107         skb_reset_transport_header(skb);
1108         ph = pnp_hdr(skb);
1109         ph->utid = 0;
1110         if (pn->aligned) {
1111                 ph->message_id = PNS_PIPE_ALIGNED_DATA;
1112                 ph->data[0] = 0; /* padding */
1113         } else
1114                 ph->message_id = PNS_PIPE_DATA;
1115         ph->pipe_handle = pn->pipe_handle;
1116         err = pn_skb_send(sk, skb, NULL);
1117
1118         if (err && pn_flow_safe(pn->tx_fc))
1119                 atomic_inc(&pn->tx_credits);
1120         return err;
1121
1122 }
1123
1124 static int pep_sendmsg(struct kiocb *iocb, struct sock *sk,
1125                         struct msghdr *msg, size_t len)
1126 {
1127         struct pep_sock *pn = pep_sk(sk);
1128         struct sk_buff *skb;
1129         long timeo;
1130         int flags = msg->msg_flags;
1131         int err, done;
1132
1133         if ((msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|
1134                                 MSG_CMSG_COMPAT)) ||
1135                         !(msg->msg_flags & MSG_EOR))
1136                 return -EOPNOTSUPP;
1137
1138         skb = sock_alloc_send_skb(sk, MAX_PNPIPE_HEADER + len,
1139                                         flags & MSG_DONTWAIT, &err);
1140         if (!skb)
1141                 return err;
1142
1143         skb_reserve(skb, MAX_PHONET_HEADER + 3 + pn->aligned);
1144         err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
1145         if (err < 0)
1146                 goto outfree;
1147
1148         lock_sock(sk);
1149         timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
1150         if ((1 << sk->sk_state) & (TCPF_LISTEN|TCPF_CLOSE)) {
1151                 err = -ENOTCONN;
1152                 goto out;
1153         }
1154         if (sk->sk_state != TCP_ESTABLISHED) {
1155                 /* Wait until the pipe gets to enabled state */
1156 disabled:
1157                 err = sk_stream_wait_connect(sk, &timeo);
1158                 if (err)
1159                         goto out;
1160
1161                 if (sk->sk_state == TCP_CLOSE_WAIT) {
1162                         err = -ECONNRESET;
1163                         goto out;
1164                 }
1165         }
1166         BUG_ON(sk->sk_state != TCP_ESTABLISHED);
1167
1168         /* Wait until flow control allows TX */
1169         done = atomic_read(&pn->tx_credits);
1170         while (!done) {
1171                 DEFINE_WAIT(wait);
1172
1173                 if (!timeo) {
1174                         err = -EAGAIN;
1175                         goto out;
1176                 }
1177                 if (signal_pending(current)) {
1178                         err = sock_intr_errno(timeo);
1179                         goto out;
1180                 }
1181
1182                 prepare_to_wait(sk_sleep(sk), &wait,
1183                                 TASK_INTERRUPTIBLE);
1184                 done = sk_wait_event(sk, &timeo, atomic_read(&pn->tx_credits));
1185                 finish_wait(sk_sleep(sk), &wait);
1186
1187                 if (sk->sk_state != TCP_ESTABLISHED)
1188                         goto disabled;
1189         }
1190
1191         err = pipe_skb_send(sk, skb);
1192         if (err >= 0)
1193                 err = len; /* success! */
1194         skb = NULL;
1195 out:
1196         release_sock(sk);
1197 outfree:
1198         kfree_skb(skb);
1199         return err;
1200 }
1201
1202 int pep_writeable(struct sock *sk)
1203 {
1204         struct pep_sock *pn = pep_sk(sk);
1205
1206         return atomic_read(&pn->tx_credits);
1207 }
1208
1209 int pep_write(struct sock *sk, struct sk_buff *skb)
1210 {
1211         struct sk_buff *rskb, *fs;
1212         int flen = 0;
1213
1214         if (pep_sk(sk)->aligned)
1215                 return pipe_skb_send(sk, skb);
1216
1217         rskb = alloc_skb(MAX_PNPIPE_HEADER, GFP_ATOMIC);
1218         if (!rskb) {
1219                 kfree_skb(skb);
1220                 return -ENOMEM;
1221         }
1222         skb_shinfo(rskb)->frag_list = skb;
1223         rskb->len += skb->len;
1224         rskb->data_len += rskb->len;
1225         rskb->truesize += rskb->len;
1226
1227         /* Avoid nested fragments */
1228         skb_walk_frags(skb, fs)
1229                 flen += fs->len;
1230         skb->next = skb_shinfo(skb)->frag_list;
1231         skb_frag_list_init(skb);
1232         skb->len -= flen;
1233         skb->data_len -= flen;
1234         skb->truesize -= flen;
1235
1236         skb_reserve(rskb, MAX_PHONET_HEADER + 3);
1237         return pipe_skb_send(sk, rskb);
1238 }
1239
1240 struct sk_buff *pep_read(struct sock *sk)
1241 {
1242         struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1243
1244         if (sk->sk_state == TCP_ESTABLISHED)
1245                 pipe_grant_credits(sk, GFP_ATOMIC);
1246         return skb;
1247 }
1248
1249 static int pep_recvmsg(struct kiocb *iocb, struct sock *sk,
1250                         struct msghdr *msg, size_t len, int noblock,
1251                         int flags, int *addr_len)
1252 {
1253         struct sk_buff *skb;
1254         int err;
1255
1256         if (flags & ~(MSG_OOB|MSG_PEEK|MSG_TRUNC|MSG_DONTWAIT|MSG_WAITALL|
1257                         MSG_NOSIGNAL|MSG_CMSG_COMPAT))
1258                 return -EOPNOTSUPP;
1259
1260         if (unlikely(1 << sk->sk_state & (TCPF_LISTEN | TCPF_CLOSE)))
1261                 return -ENOTCONN;
1262
1263         if ((flags & MSG_OOB) || sock_flag(sk, SOCK_URGINLINE)) {
1264                 /* Dequeue and acknowledge control request */
1265                 struct pep_sock *pn = pep_sk(sk);
1266
1267                 if (flags & MSG_PEEK)
1268                         return -EOPNOTSUPP;
1269                 skb = skb_dequeue(&pn->ctrlreq_queue);
1270                 if (skb) {
1271                         pep_ctrlreq_error(sk, skb, PN_PIPE_NO_ERROR,
1272                                                 GFP_KERNEL);
1273                         msg->msg_flags |= MSG_OOB;
1274                         goto copy;
1275                 }
1276                 if (flags & MSG_OOB)
1277                         return -EINVAL;
1278         }
1279
1280         skb = skb_recv_datagram(sk, flags, noblock, &err);
1281         lock_sock(sk);
1282         if (skb == NULL) {
1283                 if (err == -ENOTCONN && sk->sk_state == TCP_CLOSE_WAIT)
1284                         err = -ECONNRESET;
1285                 release_sock(sk);
1286                 return err;
1287         }
1288
1289         if (sk->sk_state == TCP_ESTABLISHED)
1290                 pipe_grant_credits(sk, GFP_KERNEL);
1291         release_sock(sk);
1292 copy:
1293         msg->msg_flags |= MSG_EOR;
1294         if (skb->len > len)
1295                 msg->msg_flags |= MSG_TRUNC;
1296         else
1297                 len = skb->len;
1298
1299         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len);
1300         if (!err)
1301                 err = (flags & MSG_TRUNC) ? skb->len : len;
1302
1303         skb_free_datagram(sk, skb);
1304         return err;
1305 }
1306
1307 static void pep_sock_unhash(struct sock *sk)
1308 {
1309         struct pep_sock *pn = pep_sk(sk);
1310         struct sock *skparent = NULL;
1311
1312         lock_sock(sk);
1313
1314         if (pn->listener != NULL) {
1315                 skparent = pn->listener;
1316                 pn->listener = NULL;
1317                 release_sock(sk);
1318
1319                 pn = pep_sk(skparent);
1320                 lock_sock(skparent);
1321                 sk_del_node_init(sk);
1322                 sk = skparent;
1323         }
1324
1325         /* Unhash a listening sock only when it is closed
1326          * and all of its active connected pipes are closed. */
1327         if (hlist_empty(&pn->hlist))
1328                 pn_sock_unhash(&pn->pn_sk.sk);
1329         release_sock(sk);
1330
1331         if (skparent)
1332                 sock_put(skparent);
1333 }
1334
1335 static struct proto pep_proto = {
1336         .close          = pep_sock_close,
1337         .accept         = pep_sock_accept,
1338         .connect        = pep_sock_connect,
1339         .ioctl          = pep_ioctl,
1340         .init           = pep_init,
1341         .setsockopt     = pep_setsockopt,
1342         .getsockopt     = pep_getsockopt,
1343         .sendmsg        = pep_sendmsg,
1344         .recvmsg        = pep_recvmsg,
1345         .backlog_rcv    = pep_do_rcv,
1346         .hash           = pn_sock_hash,
1347         .unhash         = pep_sock_unhash,
1348         .get_port       = pn_sock_get_port,
1349         .obj_size       = sizeof(struct pep_sock),
1350         .owner          = THIS_MODULE,
1351         .name           = "PNPIPE",
1352 };
1353
1354 static struct phonet_protocol pep_pn_proto = {
1355         .ops            = &phonet_stream_ops,
1356         .prot           = &pep_proto,
1357         .sock_type      = SOCK_SEQPACKET,
1358 };
1359
1360 static int __init pep_register(void)
1361 {
1362         return phonet_proto_register(PN_PROTO_PIPE, &pep_pn_proto);
1363 }
1364
1365 static void __exit pep_unregister(void)
1366 {
1367         phonet_proto_unregister(PN_PROTO_PIPE, &pep_pn_proto);
1368 }
1369
1370 module_init(pep_register);
1371 module_exit(pep_unregister);
1372 MODULE_AUTHOR("Remi Denis-Courmont, Nokia");
1373 MODULE_DESCRIPTION("Phonet pipe protocol");
1374 MODULE_LICENSE("GPL");
1375 MODULE_ALIAS_NET_PF_PROTO(PF_PHONET, PN_PROTO_PIPE);