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9641458d RDC |
1 | /* |
2 | * File: pep.c | |
3 | * | |
4 | * Phonet pipe protocol end point socket | |
5 | * | |
6 | * Copyright (C) 2008 Nokia Corporation. | |
7 | * | |
8 | * Author: Rémi 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> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
9641458d RDC |
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 <net/phonet/phonet.h> | |
34 | #include <net/phonet/pep.h> | |
02a47617 | 35 | #include <net/phonet/gprs.h> |
9641458d RDC |
36 | |
37 | /* sk_state values: | |
38 | * TCP_CLOSE sock not in use yet | |
39 | * TCP_CLOSE_WAIT disconnected pipe | |
40 | * TCP_LISTEN listening pipe endpoint | |
41 | * TCP_SYN_RECV connected pipe in disabled state | |
42 | * TCP_ESTABLISHED connected pipe in enabled state | |
43 | * | |
44 | * pep_sock locking: | |
45 | * - sk_state, ackq, hlist: sock lock needed | |
46 | * - listener: read only | |
47 | * - pipe_handle: read only | |
48 | */ | |
49 | ||
50 | #define CREDITS_MAX 10 | |
51 | #define CREDITS_THR 7 | |
52 | ||
53 | static const struct sockaddr_pn pipe_srv = { | |
54 | .spn_family = AF_PHONET, | |
55 | .spn_resource = 0xD9, /* pipe service */ | |
56 | }; | |
57 | ||
58 | #define pep_sb_size(s) (((s) + 5) & ~3) /* 2-bytes head, 32-bits aligned */ | |
59 | ||
60 | /* Get the next TLV sub-block. */ | |
61 | static unsigned char *pep_get_sb(struct sk_buff *skb, u8 *ptype, u8 *plen, | |
62 | void *buf) | |
63 | { | |
64 | void *data = NULL; | |
65 | struct { | |
66 | u8 sb_type; | |
67 | u8 sb_len; | |
68 | } *ph, h; | |
69 | int buflen = *plen; | |
70 | ||
71 | ph = skb_header_pointer(skb, 0, 2, &h); | |
72 | if (ph == NULL || ph->sb_len < 2 || !pskb_may_pull(skb, ph->sb_len)) | |
73 | return NULL; | |
74 | ph->sb_len -= 2; | |
75 | *ptype = ph->sb_type; | |
76 | *plen = ph->sb_len; | |
77 | ||
78 | if (buflen > ph->sb_len) | |
79 | buflen = ph->sb_len; | |
80 | data = skb_header_pointer(skb, 2, buflen, buf); | |
81 | __skb_pull(skb, 2 + ph->sb_len); | |
82 | return data; | |
83 | } | |
84 | ||
85 | static int pep_reply(struct sock *sk, struct sk_buff *oskb, | |
86 | u8 code, const void *data, int len, gfp_t priority) | |
87 | { | |
88 | const struct pnpipehdr *oph = pnp_hdr(oskb); | |
89 | struct pnpipehdr *ph; | |
90 | struct sk_buff *skb; | |
91 | ||
92 | skb = alloc_skb(MAX_PNPIPE_HEADER + len, priority); | |
93 | if (!skb) | |
94 | return -ENOMEM; | |
95 | skb_set_owner_w(skb, sk); | |
96 | ||
97 | skb_reserve(skb, MAX_PNPIPE_HEADER); | |
98 | __skb_put(skb, len); | |
99 | skb_copy_to_linear_data(skb, data, len); | |
100 | __skb_push(skb, sizeof(*ph)); | |
101 | skb_reset_transport_header(skb); | |
102 | ph = pnp_hdr(skb); | |
103 | ph->utid = oph->utid; | |
104 | ph->message_id = oph->message_id + 1; /* REQ -> RESP */ | |
105 | ph->pipe_handle = oph->pipe_handle; | |
106 | ph->error_code = code; | |
107 | ||
108 | return pn_skb_send(sk, skb, &pipe_srv); | |
109 | } | |
110 | ||
111 | #define PAD 0x00 | |
112 | static int pep_accept_conn(struct sock *sk, struct sk_buff *skb) | |
113 | { | |
114 | static const u8 data[20] = { | |
115 | PAD, PAD, PAD, 2 /* sub-blocks */, | |
116 | PN_PIPE_SB_REQUIRED_FC_TX, pep_sb_size(5), 3, PAD, | |
117 | PN_MULTI_CREDIT_FLOW_CONTROL, | |
118 | PN_ONE_CREDIT_FLOW_CONTROL, | |
119 | PN_LEGACY_FLOW_CONTROL, | |
120 | PAD, | |
121 | PN_PIPE_SB_PREFERRED_FC_RX, pep_sb_size(5), 3, PAD, | |
122 | PN_MULTI_CREDIT_FLOW_CONTROL, | |
123 | PN_ONE_CREDIT_FLOW_CONTROL, | |
124 | PN_LEGACY_FLOW_CONTROL, | |
125 | PAD, | |
126 | }; | |
127 | ||
128 | might_sleep(); | |
129 | return pep_reply(sk, skb, PN_PIPE_NO_ERROR, data, sizeof(data), | |
130 | GFP_KERNEL); | |
131 | } | |
132 | ||
133 | static int pep_reject_conn(struct sock *sk, struct sk_buff *skb, u8 code) | |
134 | { | |
135 | static const u8 data[4] = { PAD, PAD, PAD, 0 /* sub-blocks */ }; | |
136 | WARN_ON(code == PN_PIPE_NO_ERROR); | |
137 | return pep_reply(sk, skb, code, data, sizeof(data), GFP_ATOMIC); | |
138 | } | |
139 | ||
140 | /* Control requests are not sent by the pipe service and have a specific | |
141 | * message format. */ | |
c41bd97f RDC |
142 | static int pep_ctrlreq_error(struct sock *sk, struct sk_buff *oskb, u8 code, |
143 | gfp_t priority) | |
9641458d RDC |
144 | { |
145 | const struct pnpipehdr *oph = pnp_hdr(oskb); | |
146 | struct sk_buff *skb; | |
147 | struct pnpipehdr *ph; | |
148 | struct sockaddr_pn dst; | |
149 | ||
c41bd97f | 150 | skb = alloc_skb(MAX_PNPIPE_HEADER + 4, priority); |
9641458d RDC |
151 | if (!skb) |
152 | return -ENOMEM; | |
153 | skb_set_owner_w(skb, sk); | |
154 | ||
155 | skb_reserve(skb, MAX_PHONET_HEADER); | |
156 | ph = (struct pnpipehdr *)skb_put(skb, sizeof(*ph) + 4); | |
157 | ||
158 | ph->utid = oph->utid; | |
159 | ph->message_id = PNS_PEP_CTRL_RESP; | |
160 | ph->pipe_handle = oph->pipe_handle; | |
161 | ph->data[0] = oph->data[1]; /* CTRL id */ | |
162 | ph->data[1] = oph->data[0]; /* PEP type */ | |
163 | ph->data[2] = code; /* error code, at an usual offset */ | |
164 | ph->data[3] = PAD; | |
165 | ph->data[4] = PAD; | |
166 | ||
167 | pn_skb_get_src_sockaddr(oskb, &dst); | |
168 | return pn_skb_send(sk, skb, &dst); | |
169 | } | |
170 | ||
171 | static int pipe_snd_status(struct sock *sk, u8 type, u8 status, gfp_t priority) | |
172 | { | |
173 | struct pep_sock *pn = pep_sk(sk); | |
174 | struct pnpipehdr *ph; | |
175 | struct sk_buff *skb; | |
176 | ||
177 | skb = alloc_skb(MAX_PNPIPE_HEADER + 4, priority); | |
178 | if (!skb) | |
179 | return -ENOMEM; | |
180 | skb_set_owner_w(skb, sk); | |
181 | ||
182 | skb_reserve(skb, MAX_PNPIPE_HEADER + 4); | |
183 | __skb_push(skb, sizeof(*ph) + 4); | |
184 | skb_reset_transport_header(skb); | |
185 | ph = pnp_hdr(skb); | |
186 | ph->utid = 0; | |
187 | ph->message_id = PNS_PEP_STATUS_IND; | |
188 | ph->pipe_handle = pn->pipe_handle; | |
189 | ph->pep_type = PN_PEP_TYPE_COMMON; | |
190 | ph->data[1] = type; | |
191 | ph->data[2] = PAD; | |
192 | ph->data[3] = PAD; | |
193 | ph->data[4] = status; | |
194 | ||
195 | return pn_skb_send(sk, skb, &pipe_srv); | |
196 | } | |
197 | ||
198 | /* Send our RX flow control information to the sender. | |
199 | * Socket must be locked. */ | |
200 | static void pipe_grant_credits(struct sock *sk) | |
201 | { | |
202 | struct pep_sock *pn = pep_sk(sk); | |
203 | ||
204 | BUG_ON(sk->sk_state != TCP_ESTABLISHED); | |
205 | ||
206 | switch (pn->rx_fc) { | |
207 | case PN_LEGACY_FLOW_CONTROL: /* TODO */ | |
208 | break; | |
209 | case PN_ONE_CREDIT_FLOW_CONTROL: | |
210 | pipe_snd_status(sk, PN_PEP_IND_FLOW_CONTROL, | |
211 | PEP_IND_READY, GFP_ATOMIC); | |
212 | pn->rx_credits = 1; | |
213 | break; | |
214 | case PN_MULTI_CREDIT_FLOW_CONTROL: | |
215 | if ((pn->rx_credits + CREDITS_THR) > CREDITS_MAX) | |
216 | break; | |
217 | if (pipe_snd_status(sk, PN_PEP_IND_ID_MCFC_GRANT_CREDITS, | |
218 | CREDITS_MAX - pn->rx_credits, | |
219 | GFP_ATOMIC) == 0) | |
220 | pn->rx_credits = CREDITS_MAX; | |
221 | break; | |
222 | } | |
223 | } | |
224 | ||
225 | static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb) | |
226 | { | |
227 | struct pep_sock *pn = pep_sk(sk); | |
228 | struct pnpipehdr *hdr = pnp_hdr(skb); | |
be677730 | 229 | int wake = 0; |
9641458d RDC |
230 | |
231 | if (!pskb_may_pull(skb, sizeof(*hdr) + 4)) | |
232 | return -EINVAL; | |
233 | ||
234 | if (hdr->data[0] != PN_PEP_TYPE_COMMON) { | |
235 | LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP type: %u\n", | |
236 | (unsigned)hdr->data[0]); | |
237 | return -EOPNOTSUPP; | |
238 | } | |
239 | ||
240 | switch (hdr->data[1]) { | |
241 | case PN_PEP_IND_FLOW_CONTROL: | |
242 | switch (pn->tx_fc) { | |
243 | case PN_LEGACY_FLOW_CONTROL: | |
244 | switch (hdr->data[4]) { | |
245 | case PEP_IND_BUSY: | |
be677730 | 246 | atomic_set(&pn->tx_credits, 0); |
9641458d RDC |
247 | break; |
248 | case PEP_IND_READY: | |
be677730 | 249 | atomic_set(&pn->tx_credits, wake = 1); |
9641458d RDC |
250 | break; |
251 | } | |
252 | break; | |
253 | case PN_ONE_CREDIT_FLOW_CONTROL: | |
254 | if (hdr->data[4] == PEP_IND_READY) | |
be677730 | 255 | atomic_set(&pn->tx_credits, wake = 1); |
9641458d RDC |
256 | break; |
257 | } | |
258 | break; | |
259 | ||
260 | case PN_PEP_IND_ID_MCFC_GRANT_CREDITS: | |
261 | if (pn->tx_fc != PN_MULTI_CREDIT_FLOW_CONTROL) | |
262 | break; | |
be677730 | 263 | atomic_add(wake = hdr->data[4], &pn->tx_credits); |
9641458d RDC |
264 | break; |
265 | ||
266 | default: | |
267 | LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP indication: %u\n", | |
268 | (unsigned)hdr->data[1]); | |
269 | return -EOPNOTSUPP; | |
270 | } | |
be677730 | 271 | if (wake) |
9641458d RDC |
272 | sk->sk_write_space(sk); |
273 | return 0; | |
274 | } | |
275 | ||
276 | static int pipe_rcv_created(struct sock *sk, struct sk_buff *skb) | |
277 | { | |
278 | struct pep_sock *pn = pep_sk(sk); | |
279 | struct pnpipehdr *hdr = pnp_hdr(skb); | |
280 | u8 n_sb = hdr->data[0]; | |
281 | ||
282 | pn->rx_fc = pn->tx_fc = PN_LEGACY_FLOW_CONTROL; | |
283 | __skb_pull(skb, sizeof(*hdr)); | |
284 | while (n_sb > 0) { | |
285 | u8 type, buf[2], len = sizeof(buf); | |
286 | u8 *data = pep_get_sb(skb, &type, &len, buf); | |
287 | ||
288 | if (data == NULL) | |
289 | return -EINVAL; | |
290 | switch (type) { | |
291 | case PN_PIPE_SB_NEGOTIATED_FC: | |
292 | if (len < 2 || (data[0] | data[1]) > 3) | |
293 | break; | |
294 | pn->tx_fc = data[0] & 3; | |
295 | pn->rx_fc = data[1] & 3; | |
296 | break; | |
297 | } | |
298 | n_sb--; | |
299 | } | |
300 | return 0; | |
301 | } | |
302 | ||
303 | /* Queue an skb to a connected sock. | |
304 | * Socket lock must be held. */ | |
305 | static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb) | |
306 | { | |
307 | struct pep_sock *pn = pep_sk(sk); | |
308 | struct pnpipehdr *hdr = pnp_hdr(skb); | |
c41bd97f | 309 | struct sk_buff_head *queue; |
9641458d RDC |
310 | int err = 0; |
311 | ||
312 | BUG_ON(sk->sk_state == TCP_CLOSE_WAIT); | |
313 | ||
314 | switch (hdr->message_id) { | |
315 | case PNS_PEP_CONNECT_REQ: | |
316 | pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE); | |
317 | break; | |
318 | ||
319 | case PNS_PEP_DISCONNECT_REQ: | |
320 | pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); | |
321 | sk->sk_state = TCP_CLOSE_WAIT; | |
322 | if (!sock_flag(sk, SOCK_DEAD)) | |
323 | sk->sk_state_change(sk); | |
324 | break; | |
325 | ||
326 | case PNS_PEP_ENABLE_REQ: | |
327 | /* Wait for PNS_PIPE_(ENABLED|REDIRECTED)_IND */ | |
328 | pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); | |
329 | break; | |
330 | ||
331 | case PNS_PEP_RESET_REQ: | |
332 | switch (hdr->state_after_reset) { | |
333 | case PN_PIPE_DISABLE: | |
334 | pn->init_enable = 0; | |
335 | break; | |
336 | case PN_PIPE_ENABLE: | |
337 | pn->init_enable = 1; | |
338 | break; | |
339 | default: /* not allowed to send an error here!? */ | |
340 | err = -EINVAL; | |
341 | goto out; | |
342 | } | |
343 | /* fall through */ | |
344 | case PNS_PEP_DISABLE_REQ: | |
be677730 | 345 | atomic_set(&pn->tx_credits, 0); |
9641458d RDC |
346 | pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); |
347 | break; | |
348 | ||
349 | case PNS_PEP_CTRL_REQ: | |
2e2fb4b3 RDC |
350 | if (skb_queue_len(&pn->ctrlreq_queue) >= PNPIPE_CTRLREQ_MAX) { |
351 | atomic_inc(&sk->sk_drops); | |
c41bd97f | 352 | break; |
2e2fb4b3 | 353 | } |
c41bd97f RDC |
354 | __skb_pull(skb, 4); |
355 | queue = &pn->ctrlreq_queue; | |
356 | goto queue; | |
9641458d | 357 | |
fc6a1107 RDC |
358 | case PNS_PIPE_ALIGNED_DATA: |
359 | __skb_pull(skb, 1); | |
360 | /* fall through */ | |
9641458d RDC |
361 | case PNS_PIPE_DATA: |
362 | __skb_pull(skb, 3); /* Pipe data header */ | |
363 | if (!pn_flow_safe(pn->rx_fc)) { | |
364 | err = sock_queue_rcv_skb(sk, skb); | |
365 | if (!err) | |
366 | return 0; | |
367 | break; | |
368 | } | |
369 | ||
370 | if (pn->rx_credits == 0) { | |
2e2fb4b3 | 371 | atomic_inc(&sk->sk_drops); |
9641458d RDC |
372 | err = -ENOBUFS; |
373 | break; | |
374 | } | |
375 | pn->rx_credits--; | |
c41bd97f RDC |
376 | queue = &sk->sk_receive_queue; |
377 | goto queue; | |
9641458d RDC |
378 | |
379 | case PNS_PEP_STATUS_IND: | |
380 | pipe_rcv_status(sk, skb); | |
381 | break; | |
382 | ||
383 | case PNS_PIPE_REDIRECTED_IND: | |
384 | err = pipe_rcv_created(sk, skb); | |
385 | break; | |
386 | ||
387 | case PNS_PIPE_CREATED_IND: | |
388 | err = pipe_rcv_created(sk, skb); | |
389 | if (err) | |
390 | break; | |
391 | /* fall through */ | |
392 | case PNS_PIPE_RESET_IND: | |
393 | if (!pn->init_enable) | |
394 | break; | |
395 | /* fall through */ | |
396 | case PNS_PIPE_ENABLED_IND: | |
397 | if (!pn_flow_safe(pn->tx_fc)) { | |
be677730 | 398 | atomic_set(&pn->tx_credits, 1); |
9641458d RDC |
399 | sk->sk_write_space(sk); |
400 | } | |
401 | if (sk->sk_state == TCP_ESTABLISHED) | |
402 | break; /* Nothing to do */ | |
403 | sk->sk_state = TCP_ESTABLISHED; | |
404 | pipe_grant_credits(sk); | |
405 | break; | |
406 | ||
407 | case PNS_PIPE_DISABLED_IND: | |
408 | sk->sk_state = TCP_SYN_RECV; | |
409 | pn->rx_credits = 0; | |
410 | break; | |
411 | ||
412 | default: | |
413 | LIMIT_NETDEBUG(KERN_DEBUG"Phonet unknown PEP message: %u\n", | |
414 | hdr->message_id); | |
415 | err = -EINVAL; | |
416 | } | |
417 | out: | |
418 | kfree_skb(skb); | |
419 | return err; | |
c41bd97f RDC |
420 | |
421 | queue: | |
422 | skb->dev = NULL; | |
423 | skb_set_owner_r(skb, sk); | |
424 | err = skb->len; | |
425 | skb_queue_tail(queue, skb); | |
426 | if (!sock_flag(sk, SOCK_DEAD)) | |
427 | sk->sk_data_ready(sk, err); | |
428 | return 0; | |
9641458d RDC |
429 | } |
430 | ||
431 | /* Destroy connected sock. */ | |
432 | static void pipe_destruct(struct sock *sk) | |
433 | { | |
c41bd97f RDC |
434 | struct pep_sock *pn = pep_sk(sk); |
435 | ||
9641458d | 436 | skb_queue_purge(&sk->sk_receive_queue); |
c41bd97f | 437 | skb_queue_purge(&pn->ctrlreq_queue); |
9641458d RDC |
438 | } |
439 | ||
440 | static int pep_connreq_rcv(struct sock *sk, struct sk_buff *skb) | |
441 | { | |
442 | struct sock *newsk; | |
443 | struct pep_sock *newpn, *pn = pep_sk(sk); | |
444 | struct pnpipehdr *hdr; | |
445 | struct sockaddr_pn dst; | |
446 | u16 peer_type; | |
447 | u8 pipe_handle, enabled, n_sb; | |
fea93ece | 448 | u8 aligned = 0; |
9641458d RDC |
449 | |
450 | if (!pskb_pull(skb, sizeof(*hdr) + 4)) | |
451 | return -EINVAL; | |
452 | ||
453 | hdr = pnp_hdr(skb); | |
454 | pipe_handle = hdr->pipe_handle; | |
455 | switch (hdr->state_after_connect) { | |
456 | case PN_PIPE_DISABLE: | |
457 | enabled = 0; | |
458 | break; | |
459 | case PN_PIPE_ENABLE: | |
460 | enabled = 1; | |
461 | break; | |
462 | default: | |
463 | pep_reject_conn(sk, skb, PN_PIPE_ERR_INVALID_PARAM); | |
464 | return -EINVAL; | |
465 | } | |
466 | peer_type = hdr->other_pep_type << 8; | |
467 | ||
468 | if (unlikely(sk->sk_state != TCP_LISTEN) || sk_acceptq_is_full(sk)) { | |
469 | pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE); | |
470 | return -ENOBUFS; | |
471 | } | |
472 | ||
473 | /* Parse sub-blocks (options) */ | |
474 | n_sb = hdr->data[4]; | |
475 | while (n_sb > 0) { | |
476 | u8 type, buf[1], len = sizeof(buf); | |
477 | const u8 *data = pep_get_sb(skb, &type, &len, buf); | |
478 | ||
479 | if (data == NULL) | |
480 | return -EINVAL; | |
481 | switch (type) { | |
482 | case PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE: | |
483 | if (len < 1) | |
484 | return -EINVAL; | |
485 | peer_type = (peer_type & 0xff00) | data[0]; | |
486 | break; | |
fea93ece RDC |
487 | case PN_PIPE_SB_ALIGNED_DATA: |
488 | aligned = data[0] != 0; | |
489 | break; | |
9641458d RDC |
490 | } |
491 | n_sb--; | |
492 | } | |
493 | ||
494 | skb = skb_clone(skb, GFP_ATOMIC); | |
495 | if (!skb) | |
496 | return -ENOMEM; | |
497 | ||
498 | /* Create a new to-be-accepted sock */ | |
499 | newsk = sk_alloc(sock_net(sk), PF_PHONET, GFP_ATOMIC, sk->sk_prot); | |
500 | if (!newsk) { | |
501 | kfree_skb(skb); | |
502 | return -ENOMEM; | |
503 | } | |
504 | sock_init_data(NULL, newsk); | |
505 | newsk->sk_state = TCP_SYN_RECV; | |
506 | newsk->sk_backlog_rcv = pipe_do_rcv; | |
507 | newsk->sk_protocol = sk->sk_protocol; | |
508 | newsk->sk_destruct = pipe_destruct; | |
509 | ||
510 | newpn = pep_sk(newsk); | |
511 | pn_skb_get_dst_sockaddr(skb, &dst); | |
512 | newpn->pn_sk.sobject = pn_sockaddr_get_object(&dst); | |
513 | newpn->pn_sk.resource = pn->pn_sk.resource; | |
c41bd97f | 514 | skb_queue_head_init(&newpn->ctrlreq_queue); |
9641458d | 515 | newpn->pipe_handle = pipe_handle; |
be677730 | 516 | atomic_set(&newpn->tx_credits, 0); |
9641458d | 517 | newpn->peer_type = peer_type; |
be677730 | 518 | newpn->rx_credits = 0; |
9641458d RDC |
519 | newpn->rx_fc = newpn->tx_fc = PN_LEGACY_FLOW_CONTROL; |
520 | newpn->init_enable = enabled; | |
fea93ece | 521 | newpn->aligned = aligned; |
9641458d RDC |
522 | |
523 | BUG_ON(!skb_queue_empty(&newsk->sk_receive_queue)); | |
524 | skb_queue_head(&newsk->sk_receive_queue, skb); | |
525 | if (!sock_flag(sk, SOCK_DEAD)) | |
526 | sk->sk_data_ready(sk, 0); | |
527 | ||
528 | sk_acceptq_added(sk); | |
529 | sk_add_node(newsk, &pn->ackq); | |
530 | return 0; | |
531 | } | |
532 | ||
533 | /* Listening sock must be locked */ | |
534 | static struct sock *pep_find_pipe(const struct hlist_head *hlist, | |
535 | const struct sockaddr_pn *dst, | |
536 | u8 pipe_handle) | |
537 | { | |
538 | struct hlist_node *node; | |
539 | struct sock *sknode; | |
540 | u16 dobj = pn_sockaddr_get_object(dst); | |
541 | ||
542 | sk_for_each(sknode, node, hlist) { | |
543 | struct pep_sock *pnnode = pep_sk(sknode); | |
544 | ||
545 | /* Ports match, but addresses might not: */ | |
546 | if (pnnode->pn_sk.sobject != dobj) | |
547 | continue; | |
548 | if (pnnode->pipe_handle != pipe_handle) | |
549 | continue; | |
550 | if (sknode->sk_state == TCP_CLOSE_WAIT) | |
551 | continue; | |
552 | ||
553 | sock_hold(sknode); | |
554 | return sknode; | |
555 | } | |
556 | return NULL; | |
557 | } | |
558 | ||
559 | /* | |
560 | * Deliver an skb to a listening sock. | |
561 | * Socket lock must be held. | |
562 | * We then queue the skb to the right connected sock (if any). | |
563 | */ | |
564 | static int pep_do_rcv(struct sock *sk, struct sk_buff *skb) | |
565 | { | |
566 | struct pep_sock *pn = pep_sk(sk); | |
567 | struct sock *sknode; | |
2ddc1ac1 | 568 | struct pnpipehdr *hdr; |
9641458d RDC |
569 | struct sockaddr_pn dst; |
570 | int err = NET_RX_SUCCESS; | |
571 | u8 pipe_handle; | |
572 | ||
573 | if (!pskb_may_pull(skb, sizeof(*hdr))) | |
574 | goto drop; | |
575 | ||
576 | hdr = pnp_hdr(skb); | |
577 | pipe_handle = hdr->pipe_handle; | |
578 | if (pipe_handle == PN_PIPE_INVALID_HANDLE) | |
579 | goto drop; | |
580 | ||
581 | pn_skb_get_dst_sockaddr(skb, &dst); | |
582 | ||
583 | /* Look for an existing pipe handle */ | |
584 | sknode = pep_find_pipe(&pn->hlist, &dst, pipe_handle); | |
585 | if (sknode) | |
586 | return sk_receive_skb(sknode, skb, 1); | |
587 | ||
588 | /* Look for a pipe handle pending accept */ | |
589 | sknode = pep_find_pipe(&pn->ackq, &dst, pipe_handle); | |
590 | if (sknode) { | |
591 | sock_put(sknode); | |
592 | if (net_ratelimit()) | |
593 | printk(KERN_WARNING"Phonet unconnected PEP ignored"); | |
594 | err = NET_RX_DROP; | |
595 | goto drop; | |
596 | } | |
597 | ||
598 | switch (hdr->message_id) { | |
599 | case PNS_PEP_CONNECT_REQ: | |
600 | err = pep_connreq_rcv(sk, skb); | |
601 | break; | |
602 | ||
603 | case PNS_PEP_DISCONNECT_REQ: | |
604 | pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); | |
605 | break; | |
606 | ||
607 | case PNS_PEP_CTRL_REQ: | |
c41bd97f | 608 | pep_ctrlreq_error(sk, skb, PN_PIPE_INVALID_HANDLE, GFP_ATOMIC); |
9641458d RDC |
609 | break; |
610 | ||
611 | case PNS_PEP_RESET_REQ: | |
612 | case PNS_PEP_ENABLE_REQ: | |
613 | case PNS_PEP_DISABLE_REQ: | |
614 | /* invalid handle is not even allowed here! */ | |
615 | default: | |
616 | err = NET_RX_DROP; | |
617 | } | |
618 | drop: | |
619 | kfree_skb(skb); | |
620 | return err; | |
621 | } | |
622 | ||
623 | /* associated socket ceases to exist */ | |
624 | static void pep_sock_close(struct sock *sk, long timeout) | |
625 | { | |
626 | struct pep_sock *pn = pep_sk(sk); | |
02a47617 | 627 | int ifindex = 0; |
9641458d | 628 | |
e513480e | 629 | sock_hold(sk); /* keep a reference after sk_common_release() */ |
9641458d RDC |
630 | sk_common_release(sk); |
631 | ||
632 | lock_sock(sk); | |
633 | if (sk->sk_state == TCP_LISTEN) { | |
634 | /* Destroy the listen queue */ | |
635 | struct sock *sknode; | |
636 | struct hlist_node *p, *n; | |
637 | ||
638 | sk_for_each_safe(sknode, p, n, &pn->ackq) | |
639 | sk_del_node_init(sknode); | |
640 | sk->sk_state = TCP_CLOSE; | |
641 | } | |
02a47617 RDC |
642 | ifindex = pn->ifindex; |
643 | pn->ifindex = 0; | |
9641458d | 644 | release_sock(sk); |
02a47617 RDC |
645 | |
646 | if (ifindex) | |
647 | gprs_detach(sk); | |
e513480e | 648 | sock_put(sk); |
9641458d RDC |
649 | } |
650 | ||
651 | static int pep_wait_connreq(struct sock *sk, int noblock) | |
652 | { | |
653 | struct task_struct *tsk = current; | |
654 | struct pep_sock *pn = pep_sk(sk); | |
655 | long timeo = sock_rcvtimeo(sk, noblock); | |
656 | ||
657 | for (;;) { | |
658 | DEFINE_WAIT(wait); | |
659 | ||
660 | if (sk->sk_state != TCP_LISTEN) | |
661 | return -EINVAL; | |
662 | if (!hlist_empty(&pn->ackq)) | |
663 | break; | |
664 | if (!timeo) | |
665 | return -EWOULDBLOCK; | |
666 | if (signal_pending(tsk)) | |
667 | return sock_intr_errno(timeo); | |
668 | ||
43815482 | 669 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
9641458d RDC |
670 | TASK_INTERRUPTIBLE); |
671 | release_sock(sk); | |
672 | timeo = schedule_timeout(timeo); | |
673 | lock_sock(sk); | |
43815482 | 674 | finish_wait(sk_sleep(sk), &wait); |
9641458d RDC |
675 | } |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp) | |
681 | { | |
682 | struct pep_sock *pn = pep_sk(sk); | |
683 | struct sock *newsk = NULL; | |
684 | struct sk_buff *oskb; | |
685 | int err; | |
686 | ||
687 | lock_sock(sk); | |
688 | err = pep_wait_connreq(sk, flags & O_NONBLOCK); | |
689 | if (err) | |
690 | goto out; | |
691 | ||
692 | newsk = __sk_head(&pn->ackq); | |
693 | ||
694 | oskb = skb_dequeue(&newsk->sk_receive_queue); | |
695 | err = pep_accept_conn(newsk, oskb); | |
696 | if (err) { | |
697 | skb_queue_head(&newsk->sk_receive_queue, oskb); | |
698 | newsk = NULL; | |
699 | goto out; | |
700 | } | |
635f0815 | 701 | kfree_skb(oskb); |
9641458d RDC |
702 | |
703 | sock_hold(sk); | |
704 | pep_sk(newsk)->listener = sk; | |
705 | ||
706 | sock_hold(newsk); | |
707 | sk_del_node_init(newsk); | |
708 | sk_acceptq_removed(sk); | |
709 | sk_add_node(newsk, &pn->hlist); | |
710 | __sock_put(newsk); | |
711 | ||
712 | out: | |
713 | release_sock(sk); | |
714 | *errp = err; | |
715 | return newsk; | |
716 | } | |
717 | ||
718 | static int pep_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
719 | { | |
c41bd97f | 720 | struct pep_sock *pn = pep_sk(sk); |
9641458d RDC |
721 | int answ; |
722 | ||
723 | switch (cmd) { | |
724 | case SIOCINQ: | |
725 | if (sk->sk_state == TCP_LISTEN) | |
726 | return -EINVAL; | |
727 | ||
728 | lock_sock(sk); | |
f64f9e71 JP |
729 | if (sock_flag(sk, SOCK_URGINLINE) && |
730 | !skb_queue_empty(&pn->ctrlreq_queue)) | |
c41bd97f RDC |
731 | answ = skb_peek(&pn->ctrlreq_queue)->len; |
732 | else if (!skb_queue_empty(&sk->sk_receive_queue)) | |
9641458d RDC |
733 | answ = skb_peek(&sk->sk_receive_queue)->len; |
734 | else | |
735 | answ = 0; | |
736 | release_sock(sk); | |
737 | return put_user(answ, (int __user *)arg); | |
738 | } | |
739 | ||
740 | return -ENOIOCTLCMD; | |
741 | } | |
742 | ||
743 | static int pep_init(struct sock *sk) | |
744 | { | |
745 | struct pep_sock *pn = pep_sk(sk); | |
746 | ||
747 | INIT_HLIST_HEAD(&pn->ackq); | |
748 | INIT_HLIST_HEAD(&pn->hlist); | |
c41bd97f | 749 | skb_queue_head_init(&pn->ctrlreq_queue); |
9641458d RDC |
750 | pn->pipe_handle = PN_PIPE_INVALID_HANDLE; |
751 | return 0; | |
752 | } | |
753 | ||
02a47617 | 754 | static int pep_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 755 | char __user *optval, unsigned int optlen) |
02a47617 RDC |
756 | { |
757 | struct pep_sock *pn = pep_sk(sk); | |
758 | int val = 0, err = 0; | |
759 | ||
760 | if (level != SOL_PNPIPE) | |
761 | return -ENOPROTOOPT; | |
762 | if (optlen >= sizeof(int)) { | |
763 | if (get_user(val, (int __user *) optval)) | |
764 | return -EFAULT; | |
765 | } | |
766 | ||
767 | lock_sock(sk); | |
768 | switch (optname) { | |
769 | case PNPIPE_ENCAP: | |
770 | if (val && val != PNPIPE_ENCAP_IP) { | |
771 | err = -EINVAL; | |
772 | break; | |
773 | } | |
774 | if (!pn->ifindex == !val) | |
775 | break; /* Nothing to do! */ | |
776 | if (!capable(CAP_NET_ADMIN)) { | |
777 | err = -EPERM; | |
778 | break; | |
779 | } | |
780 | if (val) { | |
781 | release_sock(sk); | |
782 | err = gprs_attach(sk); | |
783 | if (err > 0) { | |
784 | pn->ifindex = err; | |
785 | err = 0; | |
786 | } | |
787 | } else { | |
788 | pn->ifindex = 0; | |
789 | release_sock(sk); | |
790 | gprs_detach(sk); | |
791 | err = 0; | |
792 | } | |
793 | goto out_norel; | |
794 | default: | |
795 | err = -ENOPROTOOPT; | |
796 | } | |
797 | release_sock(sk); | |
798 | ||
799 | out_norel: | |
800 | return err; | |
801 | } | |
802 | ||
803 | static int pep_getsockopt(struct sock *sk, int level, int optname, | |
804 | char __user *optval, int __user *optlen) | |
805 | { | |
806 | struct pep_sock *pn = pep_sk(sk); | |
807 | int len, val; | |
808 | ||
809 | if (level != SOL_PNPIPE) | |
810 | return -ENOPROTOOPT; | |
811 | if (get_user(len, optlen)) | |
812 | return -EFAULT; | |
813 | ||
814 | switch (optname) { | |
815 | case PNPIPE_ENCAP: | |
816 | val = pn->ifindex ? PNPIPE_ENCAP_IP : PNPIPE_ENCAP_NONE; | |
817 | break; | |
818 | case PNPIPE_IFINDEX: | |
819 | val = pn->ifindex; | |
820 | break; | |
821 | default: | |
822 | return -ENOPROTOOPT; | |
823 | } | |
824 | ||
825 | len = min_t(unsigned int, sizeof(int), len); | |
826 | if (put_user(len, optlen)) | |
827 | return -EFAULT; | |
828 | if (put_user(val, (int __user *) optval)) | |
829 | return -EFAULT; | |
830 | return 0; | |
831 | } | |
832 | ||
833 | static int pipe_skb_send(struct sock *sk, struct sk_buff *skb) | |
834 | { | |
835 | struct pep_sock *pn = pep_sk(sk); | |
836 | struct pnpipehdr *ph; | |
1a98214f | 837 | int err; |
02a47617 | 838 | |
be677730 RDC |
839 | if (pn_flow_safe(pn->tx_fc) && |
840 | !atomic_add_unless(&pn->tx_credits, -1, 0)) { | |
841 | kfree_skb(skb); | |
842 | return -ENOBUFS; | |
843 | } | |
844 | ||
fea93ece | 845 | skb_push(skb, 3 + pn->aligned); |
02a47617 RDC |
846 | skb_reset_transport_header(skb); |
847 | ph = pnp_hdr(skb); | |
848 | ph->utid = 0; | |
fea93ece RDC |
849 | if (pn->aligned) { |
850 | ph->message_id = PNS_PIPE_ALIGNED_DATA; | |
851 | ph->data[0] = 0; /* padding */ | |
852 | } else | |
853 | ph->message_id = PNS_PIPE_DATA; | |
02a47617 | 854 | ph->pipe_handle = pn->pipe_handle; |
02a47617 | 855 | |
1a98214f RDC |
856 | err = pn_skb_send(sk, skb, &pipe_srv); |
857 | if (err && pn_flow_safe(pn->tx_fc)) | |
858 | atomic_inc(&pn->tx_credits); | |
859 | return err; | |
02a47617 RDC |
860 | } |
861 | ||
9641458d RDC |
862 | static int pep_sendmsg(struct kiocb *iocb, struct sock *sk, |
863 | struct msghdr *msg, size_t len) | |
864 | { | |
865 | struct pep_sock *pn = pep_sk(sk); | |
b1704374 | 866 | struct sk_buff *skb; |
9641458d RDC |
867 | long timeo; |
868 | int flags = msg->msg_flags; | |
869 | int err, done; | |
870 | ||
82ecbcb9 RDC |
871 | if ((msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL| |
872 | MSG_CMSG_COMPAT)) || | |
873 | !(msg->msg_flags & MSG_EOR)) | |
9641458d RDC |
874 | return -EOPNOTSUPP; |
875 | ||
b1704374 RDC |
876 | skb = sock_alloc_send_skb(sk, MAX_PNPIPE_HEADER + len, |
877 | flags & MSG_DONTWAIT, &err); | |
878 | if (!skb) | |
879 | return -ENOBUFS; | |
880 | ||
881 | skb_reserve(skb, MAX_PHONET_HEADER + 3); | |
882 | err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); | |
883 | if (err < 0) | |
884 | goto outfree; | |
885 | ||
9641458d RDC |
886 | lock_sock(sk); |
887 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); | |
888 | if ((1 << sk->sk_state) & (TCPF_LISTEN|TCPF_CLOSE)) { | |
889 | err = -ENOTCONN; | |
890 | goto out; | |
891 | } | |
892 | if (sk->sk_state != TCP_ESTABLISHED) { | |
893 | /* Wait until the pipe gets to enabled state */ | |
894 | disabled: | |
895 | err = sk_stream_wait_connect(sk, &timeo); | |
896 | if (err) | |
897 | goto out; | |
898 | ||
899 | if (sk->sk_state == TCP_CLOSE_WAIT) { | |
900 | err = -ECONNRESET; | |
901 | goto out; | |
902 | } | |
903 | } | |
904 | BUG_ON(sk->sk_state != TCP_ESTABLISHED); | |
905 | ||
906 | /* Wait until flow control allows TX */ | |
be677730 | 907 | done = atomic_read(&pn->tx_credits); |
9641458d RDC |
908 | while (!done) { |
909 | DEFINE_WAIT(wait); | |
910 | ||
911 | if (!timeo) { | |
912 | err = -EAGAIN; | |
913 | goto out; | |
914 | } | |
915 | if (signal_pending(current)) { | |
916 | err = sock_intr_errno(timeo); | |
917 | goto out; | |
918 | } | |
919 | ||
43815482 | 920 | prepare_to_wait(sk_sleep(sk), &wait, |
9641458d | 921 | TASK_INTERRUPTIBLE); |
be677730 | 922 | done = sk_wait_event(sk, &timeo, atomic_read(&pn->tx_credits)); |
43815482 | 923 | finish_wait(sk_sleep(sk), &wait); |
9641458d RDC |
924 | |
925 | if (sk->sk_state != TCP_ESTABLISHED) | |
926 | goto disabled; | |
927 | } | |
928 | ||
02a47617 | 929 | err = pipe_skb_send(sk, skb); |
9641458d RDC |
930 | if (err >= 0) |
931 | err = len; /* success! */ | |
932 | skb = NULL; | |
933 | out: | |
934 | release_sock(sk); | |
b1704374 | 935 | outfree: |
9641458d RDC |
936 | kfree_skb(skb); |
937 | return err; | |
938 | } | |
939 | ||
02a47617 RDC |
940 | int pep_writeable(struct sock *sk) |
941 | { | |
942 | struct pep_sock *pn = pep_sk(sk); | |
943 | ||
be677730 | 944 | return atomic_read(&pn->tx_credits); |
02a47617 RDC |
945 | } |
946 | ||
947 | int pep_write(struct sock *sk, struct sk_buff *skb) | |
948 | { | |
949 | struct sk_buff *rskb, *fs; | |
950 | int flen = 0; | |
951 | ||
fea93ece RDC |
952 | if (pep_sk(sk)->aligned) |
953 | return pipe_skb_send(sk, skb); | |
954 | ||
02a47617 RDC |
955 | rskb = alloc_skb(MAX_PNPIPE_HEADER, GFP_ATOMIC); |
956 | if (!rskb) { | |
957 | kfree_skb(skb); | |
958 | return -ENOMEM; | |
959 | } | |
960 | skb_shinfo(rskb)->frag_list = skb; | |
961 | rskb->len += skb->len; | |
962 | rskb->data_len += rskb->len; | |
963 | rskb->truesize += rskb->len; | |
964 | ||
965 | /* Avoid nested fragments */ | |
5c313e9a | 966 | skb_walk_frags(skb, fs) |
02a47617 RDC |
967 | flen += fs->len; |
968 | skb->next = skb_shinfo(skb)->frag_list; | |
5c313e9a | 969 | skb_frag_list_init(skb); |
02a47617 RDC |
970 | skb->len -= flen; |
971 | skb->data_len -= flen; | |
972 | skb->truesize -= flen; | |
973 | ||
974 | skb_reserve(rskb, MAX_PHONET_HEADER + 3); | |
975 | return pipe_skb_send(sk, rskb); | |
976 | } | |
977 | ||
978 | struct sk_buff *pep_read(struct sock *sk) | |
979 | { | |
980 | struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue); | |
981 | ||
982 | if (sk->sk_state == TCP_ESTABLISHED) | |
983 | pipe_grant_credits(sk); | |
984 | return skb; | |
985 | } | |
986 | ||
9641458d RDC |
987 | static int pep_recvmsg(struct kiocb *iocb, struct sock *sk, |
988 | struct msghdr *msg, size_t len, int noblock, | |
989 | int flags, int *addr_len) | |
990 | { | |
991 | struct sk_buff *skb; | |
992 | int err; | |
993 | ||
82ecbcb9 RDC |
994 | if (flags & ~(MSG_OOB|MSG_PEEK|MSG_TRUNC|MSG_DONTWAIT|MSG_WAITALL| |
995 | MSG_NOSIGNAL|MSG_CMSG_COMPAT)) | |
996 | return -EOPNOTSUPP; | |
997 | ||
9641458d RDC |
998 | if (unlikely(1 << sk->sk_state & (TCPF_LISTEN | TCPF_CLOSE))) |
999 | return -ENOTCONN; | |
1000 | ||
c41bd97f RDC |
1001 | if ((flags & MSG_OOB) || sock_flag(sk, SOCK_URGINLINE)) { |
1002 | /* Dequeue and acknowledge control request */ | |
1003 | struct pep_sock *pn = pep_sk(sk); | |
1004 | ||
82ecbcb9 RDC |
1005 | if (flags & MSG_PEEK) |
1006 | return -EOPNOTSUPP; | |
c41bd97f RDC |
1007 | skb = skb_dequeue(&pn->ctrlreq_queue); |
1008 | if (skb) { | |
1009 | pep_ctrlreq_error(sk, skb, PN_PIPE_NO_ERROR, | |
1010 | GFP_KERNEL); | |
1011 | msg->msg_flags |= MSG_OOB; | |
1012 | goto copy; | |
1013 | } | |
1014 | if (flags & MSG_OOB) | |
1015 | return -EINVAL; | |
1016 | } | |
1017 | ||
9641458d RDC |
1018 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
1019 | lock_sock(sk); | |
1020 | if (skb == NULL) { | |
1021 | if (err == -ENOTCONN && sk->sk_state == TCP_CLOSE_WAIT) | |
1022 | err = -ECONNRESET; | |
1023 | release_sock(sk); | |
1024 | return err; | |
1025 | } | |
1026 | ||
1027 | if (sk->sk_state == TCP_ESTABLISHED) | |
1028 | pipe_grant_credits(sk); | |
1029 | release_sock(sk); | |
c41bd97f | 1030 | copy: |
9641458d | 1031 | msg->msg_flags |= MSG_EOR; |
9641458d RDC |
1032 | if (skb->len > len) |
1033 | msg->msg_flags |= MSG_TRUNC; | |
1034 | else | |
1035 | len = skb->len; | |
1036 | ||
1037 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len); | |
1038 | if (!err) | |
1039 | err = (flags & MSG_TRUNC) ? skb->len : len; | |
1040 | ||
1041 | skb_free_datagram(sk, skb); | |
1042 | return err; | |
1043 | } | |
1044 | ||
1045 | static void pep_sock_unhash(struct sock *sk) | |
1046 | { | |
1047 | struct pep_sock *pn = pep_sk(sk); | |
1048 | struct sock *skparent = NULL; | |
1049 | ||
1050 | lock_sock(sk); | |
1051 | if ((1 << sk->sk_state) & ~(TCPF_CLOSE|TCPF_LISTEN)) { | |
1052 | skparent = pn->listener; | |
9641458d RDC |
1053 | release_sock(sk); |
1054 | ||
9641458d | 1055 | pn = pep_sk(skparent); |
7dfde179 RDC |
1056 | lock_sock(skparent); |
1057 | sk_del_node_init(sk); | |
1058 | sk = skparent; | |
9641458d RDC |
1059 | } |
1060 | /* Unhash a listening sock only when it is closed | |
1061 | * and all of its active connected pipes are closed. */ | |
1062 | if (hlist_empty(&pn->hlist)) | |
1063 | pn_sock_unhash(&pn->pn_sk.sk); | |
1064 | release_sock(sk); | |
1065 | ||
1066 | if (skparent) | |
1067 | sock_put(skparent); | |
1068 | } | |
1069 | ||
1070 | static struct proto pep_proto = { | |
1071 | .close = pep_sock_close, | |
1072 | .accept = pep_sock_accept, | |
1073 | .ioctl = pep_ioctl, | |
1074 | .init = pep_init, | |
02a47617 RDC |
1075 | .setsockopt = pep_setsockopt, |
1076 | .getsockopt = pep_getsockopt, | |
9641458d RDC |
1077 | .sendmsg = pep_sendmsg, |
1078 | .recvmsg = pep_recvmsg, | |
1079 | .backlog_rcv = pep_do_rcv, | |
1080 | .hash = pn_sock_hash, | |
1081 | .unhash = pep_sock_unhash, | |
1082 | .get_port = pn_sock_get_port, | |
1083 | .obj_size = sizeof(struct pep_sock), | |
1084 | .owner = THIS_MODULE, | |
1085 | .name = "PNPIPE", | |
1086 | }; | |
1087 | ||
1088 | static struct phonet_protocol pep_pn_proto = { | |
1089 | .ops = &phonet_stream_ops, | |
1090 | .prot = &pep_proto, | |
1091 | .sock_type = SOCK_SEQPACKET, | |
1092 | }; | |
1093 | ||
1094 | static int __init pep_register(void) | |
1095 | { | |
1096 | return phonet_proto_register(PN_PROTO_PIPE, &pep_pn_proto); | |
1097 | } | |
1098 | ||
1099 | static void __exit pep_unregister(void) | |
1100 | { | |
1101 | phonet_proto_unregister(PN_PROTO_PIPE, &pep_pn_proto); | |
1102 | } | |
1103 | ||
1104 | module_init(pep_register); | |
1105 | module_exit(pep_unregister); | |
1106 | MODULE_AUTHOR("Remi Denis-Courmont, Nokia"); | |
1107 | MODULE_DESCRIPTION("Phonet pipe protocol"); | |
1108 | MODULE_LICENSE("GPL"); | |
1109 | MODULE_ALIAS_NET_PF_PROTO(PF_PHONET, PN_PROTO_PIPE); |