Commit | Line | Data |
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51386eb2 KS |
1 | /* |
2 | * Copyright (c) University of British Columbia, 1984 | |
3 | * Copyright (c) 1990 The Regents of the University of California. | |
4 | * All rights reserved. | |
5 | * | |
6 | * This code is derived from software contributed to Berkeley by | |
7 | * the Laboratory for Computation Vision and the Computer Science Department | |
8 | * of the University of British Columbia. | |
9 | * | |
10 | * %sccs.include.redist.c% | |
11 | * | |
4507dea2 | 12 | * @(#)pk_usrreq.c 7.7 (Berkeley) %G% |
51386eb2 | 13 | */ |
5abb4ba0 | 14 | |
039be508 KS |
15 | #include "param.h" |
16 | #include "systm.h" | |
17 | #include "mbuf.h" | |
18 | #include "socket.h" | |
19 | #include "protosw.h" | |
20 | #include "socketvar.h" | |
21 | #include "errno.h" | |
5abb4ba0 | 22 | #include "ioctl.h" |
5abb4ba0 KS |
23 | #include "user.h" |
24 | #include "stat.h" | |
5abb4ba0 | 25 | |
039be508 KS |
26 | #include "../net/if.h" |
27 | ||
28 | #include "x25.h" | |
29 | #include "pk.h" | |
30 | #include "pk_var.h" | |
5abb4ba0 KS |
31 | |
32 | struct x25_packet *pk_template (); | |
33 | ||
34 | /* | |
35 | * | |
36 | * X.25 Packet level protocol interface to socket abstraction. | |
37 | * | |
38 | * Process an X.25 user request on a logical channel. If this is a send | |
39 | * request then m is the mbuf chain of the send data. If this is a timer | |
40 | * expiration (called from the software clock routine) them timertype is | |
41 | * the particular timer. | |
42 | * | |
43 | */ | |
44 | ||
dc8f6c26 | 45 | pk_usrreq (so, req, m, nam, control) |
5abb4ba0 KS |
46 | struct socket *so; |
47 | int req; | |
48 | register struct mbuf *m, *nam; | |
dc8f6c26 | 49 | struct mbuf *control; |
5abb4ba0 KS |
50 | { |
51 | register struct pklcd *lcp = (struct pklcd *) so -> so_pcb; | |
52 | register struct x25_packet *xp; | |
dc8f6c26 KS |
53 | register int error = 0; |
54 | ||
55 | if (req == PRU_CONTROL) | |
56 | return (pk_control(so, (int)m, (caddr_t)nam, | |
57 | (struct ifnet *)control)); | |
58 | if (control && control->m_len) { | |
59 | error = EINVAL; | |
60 | goto release; | |
5abb4ba0 | 61 | } |
dc8f6c26 KS |
62 | if (lcp == NULL && req != PRU_ATTACH) { |
63 | error = EINVAL; | |
64 | goto release; | |
5abb4ba0 KS |
65 | } |
66 | ||
67 | /* | |
68 | pk_trace (pkcbhead, TR_USER, (struct pklcd *)0, | |
69 | req, (struct x25_packet *)0); | |
70 | */ | |
71 | ||
5abb4ba0 KS |
72 | switch (req) { |
73 | /* | |
74 | * X.25 attaches to socket via PRU_ATTACH and allocates a logical | |
75 | * channel descriptor. If the socket is to receive connections, | |
76 | * then the LISTEN state is entered. | |
77 | */ | |
78 | case PRU_ATTACH: | |
79 | if (lcp) { | |
80 | error = EISCONN; | |
81 | /* Socket already connected. */ | |
82 | break; | |
83 | } | |
4507dea2 KS |
84 | lcp = pk_attach (so); |
85 | if (lcp == 0) | |
86 | error = ENOBUFS; | |
5abb4ba0 KS |
87 | break; |
88 | ||
89 | /* | |
90 | * Detach a logical channel from the socket. If the state of the | |
91 | * channel is embryonic, simply discard it. Otherwise we have to | |
92 | * initiate a PRU_DISCONNECT which will finish later. | |
93 | */ | |
94 | case PRU_DETACH: | |
95 | pk_disconnect (lcp); | |
96 | break; | |
97 | ||
98 | /* | |
99 | * Give the socket an address. | |
100 | */ | |
101 | case PRU_BIND: | |
102 | if (nam -> m_len == sizeof (struct x25_sockaddr)) | |
103 | old_to_new (nam); | |
104 | error = pk_bind (lcp, nam); | |
105 | break; | |
106 | ||
107 | /* | |
108 | * Prepare to accept connections. | |
109 | */ | |
110 | case PRU_LISTEN: | |
111 | if (lcp -> lcd_ceaddr == 0) { | |
112 | error = EDESTADDRREQ; | |
113 | break; | |
114 | } | |
115 | lcp -> lcd_state = LISTEN; | |
116 | lcp -> lcd_listen = pk_listenhead; | |
117 | pk_listenhead = lcp; | |
118 | break; | |
119 | ||
120 | /* | |
121 | * Initiate a CALL REQUEST to peer entity. Enter state SENT_CALL | |
122 | * and mark the socket as connecting. Set timer waiting for | |
123 | * CALL ACCEPT or CLEAR. | |
124 | */ | |
125 | case PRU_CONNECT: | |
126 | if (nam -> m_len == sizeof (struct x25_sockaddr)) | |
127 | old_to_new (nam); | |
ffababe5 | 128 | error = pk_connect (lcp, nam, (struct sockaddr_25 *)0); |
5abb4ba0 KS |
129 | break; |
130 | ||
131 | /* | |
132 | * Initiate a disconnect to peer entity via a CLEAR REQUEST packet. | |
133 | * The socket will be disconnected when we receive a confirmation | |
134 | * or a clear collision. | |
135 | */ | |
136 | case PRU_DISCONNECT: | |
137 | pk_disconnect (lcp); | |
138 | break; | |
139 | ||
140 | /* | |
141 | * Accept an INCOMING CALL. Most of the work has already been done | |
142 | * by pk_input. Just return the callers address to the user. | |
143 | */ | |
144 | case PRU_ACCEPT: | |
145 | if (lcp -> lcd_craddr == NULL) | |
146 | break; | |
147 | bcopy ((caddr_t)lcp -> lcd_craddr, mtod (nam, caddr_t), | |
148 | sizeof (struct sockaddr_x25)); | |
149 | nam -> m_len = sizeof (struct sockaddr_x25); | |
150 | if (lcp -> lcd_flags & X25_OLDSOCKADDR) | |
151 | new_to_old (nam); | |
152 | break; | |
153 | ||
154 | /* | |
155 | * After a receive, we should send a RR. | |
156 | */ | |
157 | case PRU_RCVD: | |
158 | lcp -> lcd_rxcnt++; | |
159 | lcp -> lcd_template = pk_template (lcp -> lcd_lcn, X25_RR); | |
160 | pk_output (lcp); | |
161 | break; | |
162 | ||
163 | /* | |
164 | * Do send by placing data on the socket output queue. | |
165 | * SHOULD WE USE m_cat HERE. | |
166 | */ | |
167 | case PRU_SEND: | |
168 | error = pk_send (lcp, m); | |
169 | break; | |
170 | ||
171 | /* | |
172 | * Abort a virtual circuit. For example all completed calls | |
173 | * waiting acceptance. | |
174 | */ | |
175 | case PRU_ABORT: | |
176 | pk_disconnect (lcp); | |
177 | break; | |
178 | ||
179 | /* Begin unimplemented hooks. */ | |
180 | ||
181 | case PRU_SHUTDOWN: | |
182 | error = EOPNOTSUPP; | |
183 | break; | |
184 | ||
185 | case PRU_CONTROL: | |
186 | error = EOPNOTSUPP; | |
187 | break; | |
188 | ||
189 | case PRU_SENSE: | |
190 | #ifdef BSD4_3 | |
191 | ((struct stat *)m) -> st_blksize = so -> so_snd.sb_hiwat; | |
192 | #else | |
193 | error = EOPNOTSUPP; | |
194 | #endif | |
195 | break; | |
196 | ||
197 | /* End unimplemented hooks. */ | |
198 | ||
199 | case PRU_SOCKADDR: | |
200 | if (lcp -> lcd_ceaddr == 0) | |
201 | return (EADDRNOTAVAIL); | |
202 | nam -> m_len = sizeof (struct sockaddr_x25); | |
203 | bcopy ((caddr_t)lcp -> lcd_ceaddr, mtod (nam, caddr_t), | |
204 | sizeof (struct sockaddr_x25)); | |
205 | if (lcp -> lcd_flags & X25_OLDSOCKADDR) | |
206 | new_to_old (nam); | |
207 | break; | |
208 | ||
209 | case PRU_PEERADDR: | |
210 | if (lcp -> lcd_state != DATA_TRANSFER) | |
211 | return (ENOTCONN); | |
212 | nam -> m_len = sizeof (struct sockaddr_x25); | |
213 | bcopy (lcp -> lcd_craddr ? (caddr_t)lcp -> lcd_craddr : | |
214 | (caddr_t)lcp -> lcd_ceaddr, | |
215 | mtod (nam, caddr_t), sizeof (struct sockaddr_x25)); | |
216 | if (lcp -> lcd_flags & X25_OLDSOCKADDR) | |
217 | new_to_old (nam); | |
218 | break; | |
219 | ||
220 | /* | |
221 | * Receive INTERRUPT packet. | |
222 | */ | |
223 | case PRU_RCVOOB: | |
224 | m -> m_len = 1; | |
225 | *mtod (m, char *) = lcp -> lcd_intrdata; | |
226 | break; | |
227 | ||
228 | /* | |
229 | * Send INTERRUPT packet. | |
230 | */ | |
231 | case PRU_SENDOOB: | |
232 | m_freem (m); | |
233 | if (lcp -> lcd_intrconf_pending) { | |
234 | error = ETOOMANYREFS; | |
235 | break; | |
236 | } | |
237 | lcp -> lcd_intrcnt++; | |
238 | xp = lcp -> lcd_template = pk_template (lcp -> lcd_lcn, X25_INTERRUPT); | |
239 | xp -> packet_data = 0; | |
240 | (dtom (xp)) -> m_len++; | |
241 | pk_output (lcp); | |
242 | break; | |
243 | ||
244 | default: | |
245 | panic ("pk_usrreq"); | |
246 | } | |
dc8f6c26 KS |
247 | release: |
248 | if (control != NULL) | |
249 | m_freem(control); | |
250 | if (m != NULL) | |
251 | m_freem(m); | |
5abb4ba0 KS |
252 | return (error); |
253 | } | |
254 | ||
ffababe5 KS |
255 | /* |
256 | * If you want to use UBC X.25 level 3 in conjunction with some | |
257 | * other X.25 level 2 driver, have the ifp->if_ioctl routine | |
258 | * assign pk_start to pkp -> pk_start when called with SIOCSIFCONF_X25. | |
259 | */ | |
260 | /* ARGSUSED */ | |
261 | pk_start (lcp) | |
262 | register struct pklcd *lcp; | |
263 | { | |
264 | extern int pk_send(); | |
265 | ||
4507dea2 | 266 | lcp -> lcd_send = pk_send; |
ffababe5 KS |
267 | return (pk_output(lcp)); |
268 | } | |
269 | ||
5abb4ba0 KS |
270 | /*ARGSUSED*/ |
271 | pk_control (so, cmd, data, ifp) | |
272 | struct socket *so; | |
273 | int cmd; | |
274 | caddr_t data; | |
275 | register struct ifnet *ifp; | |
276 | { | |
039be508 | 277 | register struct ifreq_x25 *ifr = (struct ifreq_x25 *)data; |
5abb4ba0 | 278 | register struct ifaddr *ifa = 0; |
dc8f6c26 | 279 | register struct x25_ifaddr *ia = 0; |
ffababe5 | 280 | struct pklcd *dev_lcp = 0; |
dc8f6c26 KS |
281 | int error, s; |
282 | unsigned n; | |
5abb4ba0 KS |
283 | |
284 | /* | |
285 | * Find address for this interface, if it exists. | |
286 | */ | |
287 | if (ifp) | |
288 | for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) | |
039be508 | 289 | if (ifa->ifa_addr->sa_family == AF_CCITT) |
5abb4ba0 KS |
290 | break; |
291 | ||
dc8f6c26 | 292 | ia = (struct x25_ifaddr *)ifa; |
5abb4ba0 | 293 | switch (cmd) { |
039be508 | 294 | case SIOCGIFCONF_X25: |
5abb4ba0 KS |
295 | if (ifa == 0) |
296 | return (EADDRNOTAVAIL); | |
4507dea2 | 297 | ifr->ifr_xc = ia->ia_xc; |
5abb4ba0 KS |
298 | return (0); |
299 | ||
039be508 | 300 | case SIOCSIFCONF_X25: |
4507dea2 KS |
301 | if (error = suser(u.u_cred, &u.u_acflag)) |
302 | return (error); | |
5abb4ba0 KS |
303 | if (ifp == 0) |
304 | panic("pk_control"); | |
305 | if (ifa == (struct ifaddr *)0) { | |
5abb4ba0 KS |
306 | register struct mbuf *m; |
307 | ||
ffababe5 KS |
308 | MALLOC(ia, struct x25_ifaddr *, sizeof (*ia), |
309 | M_IFADDR, M_WAITOK); | |
310 | if (ia == 0) | |
5abb4ba0 | 311 | return (ENOBUFS); |
5abb4ba0 KS |
312 | if (ifa = ifp->if_addrlist) { |
313 | for ( ; ifa->ifa_next; ifa = ifa->ifa_next) | |
314 | ; | |
dc8f6c26 | 315 | ifa->ifa_next = &ia->ia_ifa; |
5abb4ba0 | 316 | } else |
dc8f6c26 KS |
317 | ifp->if_addrlist = &ia->ia_ifa; |
318 | ifa = &ia->ia_ifa; | |
dc8f6c26 | 319 | ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; |
4507dea2 | 320 | ifa->ifa_addr = (struct sockaddr *)&ia->ia_xc.xc_addr; |
039be508 KS |
321 | ia->ia_ifp = ifp; |
322 | ia->ia_pkcb.pk_ia = ia; | |
323 | ia->ia_pkcb.pk_next = pkcbhead; | |
324 | pkcbhead = &ia->ia_pkcb; | |
5abb4ba0 | 325 | } |
039be508 | 326 | ia->ia_xcp = &(ifr->ifr_xc); |
4507dea2 KS |
327 | if (ia->ia_chan && (ia->ia_maxlcn != ia->ia_xcp->xc_maxlcn)) { |
328 | pk_restart(&ia->ia_pkcb, X25_RESTART_NETWORK_CONGESTION); | |
ffababe5 | 329 | dev_lcp = ia->ia_chan[0]; |
dc8f6c26 | 330 | free((caddr_t)ia->ia_chan, M_IFADDR); |
ffababe5 | 331 | ia->ia_chan = 0; |
dc8f6c26 | 332 | } |
ffababe5 KS |
333 | if (ia->ia_chan == 0) { |
334 | n = ia->ia_maxlcn * sizeof(struct pklcd *); | |
039be508 | 335 | ia->ia_chan = (struct pklcd **) malloc(n, M_IFADDR); |
ffababe5 KS |
336 | if (ia->ia_chan) { |
337 | bzero((caddr_t)ia->ia_chan, n); | |
338 | if (dev_lcp == 0) | |
339 | dev_lcp = pk_attach((struct socket *)0); | |
4507dea2 | 340 | ia->ia_chan[0] = dev_lcp; |
ffababe5 KS |
341 | } else { |
342 | if (dev_lcp) | |
343 | pk_close(dev_lcp); | |
344 | ia->ia_xcp = &ia->ia_xc; | |
345 | return (ENOBUFS); | |
346 | } | |
039be508 | 347 | } |
5abb4ba0 KS |
348 | /* |
349 | * Give the interface a chance to initialize if this | |
350 | * is its first address, and to validate the address. | |
351 | */ | |
dc8f6c26 KS |
352 | s = splimp(); |
353 | if (ifp->if_ioctl) | |
4507dea2 | 354 | error = (*ifp->if_ioctl)(ifp, SIOCSIFCONF_X25, ifa); |
5abb4ba0 | 355 | splx(s); |
dc8f6c26 KS |
356 | if (error == 0) { |
357 | ia->ia_xc = *ia->ia_xcp; | |
dc8f6c26 KS |
358 | } |
359 | ia->ia_xcp = &ia->ia_xc; | |
360 | return (error); | |
5abb4ba0 KS |
361 | |
362 | default: | |
363 | if (ifp == 0 || ifp->if_ioctl == 0) | |
364 | return (EOPNOTSUPP); | |
365 | return ((*ifp->if_ioctl)(ifp, cmd, data)); | |
366 | } | |
367 | } | |
5abb4ba0 | 368 | |
4507dea2 KS |
369 | pk_ctloutput(cmd, so, level, optname, mp) |
370 | struct socket *so; | |
371 | struct mbuf **mp; | |
372 | int cmd, level, optname; | |
373 | { | |
374 | register struct mbuf *m = *mp; | |
375 | int error; | |
376 | ||
377 | if (cmd == PRCO_SETOPT) switch (optname) { | |
378 | case PK_ACCTFILE: | |
379 | if (m == 0) | |
380 | return (EINVAL); | |
381 | if (m->m_len) | |
382 | error = pk_accton(mtod(m, char *)); | |
383 | else | |
384 | error = pk_accton((char *)0); | |
385 | (void) m_freem(m); | |
386 | *mp = 0; | |
387 | return (error); | |
388 | } | |
389 | if (*mp) { | |
390 | (void) m_freem(*mp); | |
391 | *mp = 0; | |
392 | } | |
393 | return (EOPNOTSUPP); | |
394 | ||
395 | } | |
396 | ||
5abb4ba0 KS |
397 | /* |
398 | * Do an in-place conversion of an "old style" | |
399 | * socket address to the new style | |
400 | */ | |
401 | ||
402 | static | |
403 | old_to_new (m) | |
404 | register struct mbuf *m; | |
405 | { | |
406 | register struct x25_sockaddr *oldp; | |
407 | register struct sockaddr_x25 *newp; | |
408 | register char *ocp, *ncp; | |
409 | struct sockaddr_x25 new; | |
410 | ||
411 | oldp = mtod (m, struct x25_sockaddr *); | |
412 | newp = &new; | |
413 | bzero ((caddr_t)newp, sizeof (*newp)); | |
414 | ||
415 | newp -> x25_family = AF_CCITT; | |
416 | newp->x25_opts.op_flags = (oldp->xaddr_facilities & X25_REVERSE_CHARGE) | |
417 | | X25_MQBIT | X25_OLDSOCKADDR; | |
418 | if (oldp -> xaddr_facilities & XS_HIPRIO) /* Datapac specific */ | |
419 | newp -> x25_opts.op_psize = X25_PS128; | |
420 | bcopy ((caddr_t)oldp -> xaddr_addr, newp -> x25_addr, | |
421 | (unsigned)min (oldp -> xaddr_len, sizeof (newp -> x25_addr) - 1)); | |
422 | bcopy ((caddr_t)oldp -> xaddr_proto, newp -> x25_udata, 4); | |
423 | newp -> x25_udlen = 4; | |
424 | ||
425 | ocp = (caddr_t)oldp -> xaddr_userdata; | |
426 | ncp = newp -> x25_udata + 4; | |
427 | while (*ocp && ocp < (caddr_t)oldp -> xaddr_userdata + 12) { | |
428 | *ncp++ = *ocp++; | |
429 | newp -> x25_udlen++; | |
430 | } | |
431 | ||
432 | bcopy ((caddr_t)newp, mtod (m, char *), sizeof (*newp)); | |
433 | m->m_len = sizeof (*newp); | |
434 | } | |
435 | ||
436 | /* | |
437 | * Do an in-place conversion of a new style | |
438 | * socket address to the old style | |
439 | */ | |
440 | ||
441 | static | |
442 | new_to_old (m) | |
443 | register struct mbuf *m; | |
444 | { | |
445 | register struct x25_sockaddr *oldp; | |
446 | register struct sockaddr_x25 *newp; | |
447 | register char *ocp, *ncp; | |
448 | struct x25_sockaddr old; | |
449 | ||
450 | oldp = &old; | |
451 | newp = mtod (m, struct sockaddr_x25 *); | |
452 | bzero ((caddr_t)oldp, sizeof (*oldp)); | |
453 | ||
454 | oldp -> xaddr_facilities = newp -> x25_opts.op_flags & X25_REVERSE_CHARGE; | |
455 | if (newp -> x25_opts.op_psize == X25_PS128) | |
456 | oldp -> xaddr_facilities |= XS_HIPRIO; /* Datapac specific */ | |
457 | ocp = (char *)oldp -> xaddr_addr; | |
458 | ncp = newp -> x25_addr; | |
459 | while (*ncp) { | |
460 | *ocp++ = *ncp++; | |
461 | oldp -> xaddr_len++; | |
462 | } | |
463 | ||
464 | bcopy (newp -> x25_udata, (caddr_t)oldp -> xaddr_proto, 4); | |
465 | bcopy (newp -> x25_udata + 4, (caddr_t)oldp -> xaddr_userdata, | |
466 | (unsigned)(newp -> x25_udlen - 4)); | |
467 | ||
468 | bcopy ((caddr_t)oldp, mtod (m, char *), sizeof (*oldp)); | |
469 | m -> m_len = sizeof (*oldp); | |
470 | } | |
471 | ||
472 | pk_send (lcp, m) | |
473 | register struct pklcd *lcp; | |
474 | register struct mbuf *m; | |
475 | { | |
476 | register struct x25_packet *xp; | |
477 | register struct mbuf *m0; | |
478 | register int len; | |
479 | ||
480 | m0 = dtom ((xp = pk_template (lcp -> lcd_lcn, X25_DATA))); | |
481 | m0 -> m_next = m; | |
482 | /* | |
483 | * Application has elected (at call setup time) to prepend | |
484 | * a control byte to each packet written indicating m-bit | |
485 | * and q-bit status. Examine and then discard this byte. | |
486 | */ | |
487 | if (lcp -> lcd_flags & X25_MQBIT) { | |
488 | register octet *cp; | |
489 | ||
490 | if (m -> m_len < 1) { | |
491 | m_freem (m0); | |
492 | return (EMSGSIZE); | |
493 | } | |
494 | cp = mtod (m, octet *); | |
495 | if (*cp & 0x80) /* XXX */ | |
496 | xp -> q_bit = 1; | |
497 | xp -> packet_type |= (*cp & 0x40) >> 2; /* XXX */ | |
498 | m -> m_len--; | |
dc8f6c26 | 499 | m -> m_data++; |
5abb4ba0 KS |
500 | } |
501 | len = m -> m_len; | |
502 | while (m -> m_next) { | |
503 | m = m -> m_next; | |
504 | len += m -> m_len; | |
505 | } | |
506 | if (len > (1 << lcp -> lcd_packetsize)) { | |
507 | m_freem (m0); | |
508 | return (EMSGSIZE); | |
509 | } | |
ffababe5 KS |
510 | if (lcp -> lcd_so) |
511 | sbappendrecord (&lcp -> lcd_so -> so_snd, m0); | |
512 | else | |
b84e7ca8 | 513 | sbappendrecord (&lcp -> lcd_sb, m0); |
5abb4ba0 KS |
514 | lcp -> lcd_template = 0; |
515 | lcp -> lcd_txcnt++; | |
516 | pk_output (lcp); | |
517 | return (0); | |
518 | } |