Commit | Line | Data |
---|---|---|
16e7cbfd | 1 | /* |
94b7ce3b | 2 | * Copyright (c) 1990 The Regents of the University of California. |
16e7cbfd KS |
3 | * All rights reserved. |
4 | * | |
94b7ce3b | 5 | * %sccs.include.redist.c% |
16e7cbfd | 6 | * |
4357c4f0 | 7 | * @(#)if_x25subr.c 7.15 (Berkeley) %G% |
16e7cbfd KS |
8 | */ |
9 | ||
10 | #include "param.h" | |
11 | #include "systm.h" | |
12 | #include "malloc.h" | |
13 | #include "mbuf.h" | |
14 | #include "protosw.h" | |
15 | #include "socket.h" | |
4507dea2 | 16 | #include "socketvar.h" |
16e7cbfd KS |
17 | #include "ioctl.h" |
18 | #include "errno.h" | |
19 | #include "syslog.h" | |
20 | ||
039be508 | 21 | #include "../net/if.h" |
4507dea2 | 22 | #include "../net/if_types.h" |
039be508 KS |
23 | #include "../net/netisr.h" |
24 | #include "../net/route.h" | |
25 | ||
26 | #include "x25.h" | |
4507dea2 KS |
27 | #include "x25err.h" |
28 | #include "pk.h" | |
039be508 | 29 | #include "pk_var.h" |
16e7cbfd | 30 | |
16e7cbfd KS |
31 | #include "machine/mtpr.h" |
32 | ||
33 | #ifdef INET | |
34 | #include "../netinet/in.h" | |
35 | #include "../netinet/in_var.h" | |
36 | #endif | |
37 | ||
38 | #ifdef NS | |
39 | #include "../netns/ns.h" | |
40 | #include "../netns/ns_if.h" | |
41 | #endif | |
42 | ||
43 | #ifdef ISO | |
cd88e354 | 44 | int tp_incoming(); |
16e7cbfd KS |
45 | #include "../netiso/argo_debug.h" |
46 | #include "../netiso/iso.h" | |
47 | #include "../netiso/iso_var.h" | |
48 | #endif | |
49 | ||
50 | extern struct ifnet loif; | |
461586fd | 51 | struct llinfo_x25 llinfo_x25 = {&llinfo_x25, &llinfo_x25}; |
cd88e354 KS |
52 | struct sockaddr *x25_dgram_sockmask; |
53 | ||
f60b6d8f KS |
54 | struct if_x25stats { |
55 | int ifx_wrongplen; | |
56 | int ifx_nophdr; | |
57 | } if_x25stats; | |
461586fd | 58 | int x25_autoconnect = 0; |
16e7cbfd KS |
59 | |
60 | #define senderr(x) {error = x; goto bad;} | |
461586fd KS |
61 | /* |
62 | * Ancillary routines | |
63 | */ | |
64 | static struct llinfo_x25 * | |
65 | x25_lxalloc(rt) | |
66 | register struct rtentry *rt; | |
67 | { | |
68 | register struct llinfo_x25 *lx; | |
69 | register struct sockaddr *dst = rt_key(rt); | |
70 | register struct ifaddr *ifa; | |
71 | ||
72 | MALLOC(lx, struct llinfo_x25 *, sizeof (*lx), M_PCB, M_NOWAIT); | |
73 | if (lx == 0) | |
74 | return lx; | |
75 | Bzero(lx, sizeof(*lx)); | |
76 | lx->lx_rt = rt; | |
77 | lx->lx_family = dst->sa_family; | |
78 | rt->rt_refcnt++; | |
79 | if (rt->rt_llinfo) | |
80 | insque(lx, (struct llinfo_x25 *)rt->rt_llinfo); | |
81 | else { | |
82 | rt->rt_llinfo = (caddr_t)lx; | |
83 | insque(lx, &llinfo_x25); | |
84 | } | |
85 | for (ifa = rt->rt_ifp->if_addrlist; ifa; ifa = ifa->ifa_next) { | |
86 | if (ifa->ifa_addr->sa_family == AF_CCITT) | |
87 | lx->lx_ia = (struct x25_ifaddr *)ifa; | |
88 | } | |
89 | return lx; | |
90 | } | |
91 | x25_lxfree(lx) | |
92 | register struct llinfo_x25 *lx; | |
93 | { | |
94 | register struct rtentry *rt = lx->lx_rt; | |
95 | register struct pklcd *lcp = lx->lx_lcd; | |
96 | ||
97 | if (lcp) { | |
98 | lcp->lcd_upper = 0; | |
99 | pk_disconnect(lcp); | |
100 | } | |
101 | if ((rt->rt_llinfo == (caddr_t)lx) && (lx->lx_next->lx_rt == rt)) | |
102 | rt->rt_llinfo = (caddr_t)lx->lx_next; | |
103 | else | |
104 | rt->rt_llinfo = 0; | |
105 | RTFREE(rt); | |
106 | remque(lx); | |
107 | FREE(lx, M_PCB); | |
108 | } | |
109 | /* | |
110 | * Process a x25 packet as datagram; | |
111 | */ | |
112 | x25_ifinput(lcp, m) | |
113 | struct pklcd *lcp; | |
114 | register struct mbuf *m; | |
115 | { | |
116 | struct llinfo_x25 *lx = (struct llinfo_x25 *)lcp->lcd_upnext; | |
117 | register struct ifnet *ifp; | |
118 | struct ifqueue *inq; | |
119 | extern struct timeval time; | |
120 | int s, len, isr; | |
121 | ||
122 | if (m == 0 || lcp->lcd_state != DATA_TRANSFER) { | |
123 | x25_connect_callback(lcp, 0); | |
124 | return; | |
125 | } | |
cd88e354 | 126 | pk_flowcontrol(lcp, 0, 1); /* Generate RR */ |
461586fd KS |
127 | ifp = m->m_pkthdr.rcvif; |
128 | ifp->if_lastchange = time; | |
129 | switch (m->m_type) { | |
130 | case MT_OOBDATA: | |
131 | if (m) | |
132 | m_freem(m); | |
133 | default: | |
134 | return; | |
135 | ||
136 | case MT_DATA: | |
137 | /* FALLTHROUGH */; | |
138 | } | |
139 | switch (lx->lx_family) { | |
140 | #ifdef INET | |
141 | case AF_INET: | |
142 | isr = NETISR_IP; | |
143 | inq = &ipintrq; | |
144 | break; | |
145 | ||
146 | #endif | |
147 | #ifdef NS | |
148 | case AF_NS: | |
149 | isr = NETISR_NS; | |
150 | inq = &nsintrq; | |
151 | break; | |
152 | ||
153 | #endif | |
154 | #ifdef ISO | |
155 | case AF_ISO: | |
156 | isr = NETISR_ISO; | |
157 | inq = &clnlintrq; | |
158 | break; | |
159 | #endif | |
160 | default: | |
161 | m_freem(m); | |
162 | ifp->if_noproto++; | |
163 | return; | |
164 | } | |
165 | s = splimp(); | |
166 | schednetisr(isr); | |
167 | if (IF_QFULL(inq)) { | |
168 | IF_DROP(inq); | |
169 | m_freem(m); | |
170 | } else { | |
171 | IF_ENQUEUE(inq, m); | |
172 | ifp->if_ibytes += m->m_pkthdr.len; | |
173 | } | |
174 | splx(s); | |
175 | } | |
176 | x25_connect_callback(lcp, m) | |
177 | register struct pklcd *lcp; | |
178 | register struct mbuf *m; | |
179 | { | |
180 | register struct llinfo_x25 *lx = (struct llinfo_x25 *)lcp->lcd_upnext; | |
181 | if (m == 0) | |
182 | goto refused; | |
183 | if (m->m_type != MT_CONTROL) { | |
184 | printf("x25_connect_callback: should panic\n"); | |
185 | goto refused; | |
186 | } | |
187 | switch (pk_decode(mtod(m, struct x25_packet *))) { | |
188 | case CALL_ACCEPTED: | |
189 | lcp->lcd_upper = x25_ifinput; | |
190 | if (lcp->lcd_sb.sb_mb) | |
191 | lcp->lcd_send(lcp); /* XXX start queued packets */ | |
192 | return; | |
193 | default: | |
194 | refused: | |
195 | lcp->lcd_upper = 0; | |
196 | lx->lx_lcd = 0; | |
197 | pk_disconnect(lcp); | |
198 | return; | |
199 | } | |
200 | } | |
cd88e354 KS |
201 | #define SA(p) ((struct sockaddr *)(p)) |
202 | #define RT(p) ((struct rtentry *)(p)) | |
203 | ||
204 | x25_dgram_incoming(lcp, m0) | |
205 | register struct pklcd *lcp; | |
206 | struct mbuf *m0; | |
207 | { | |
208 | register struct rtentry *rt, *nrt; | |
209 | register struct mbuf *m = m0->m_next; /* m0 has calling sockaddr_x25 */ | |
210 | int x25_rtrequest(); | |
211 | ||
212 | rt = rtalloc1(SA(&lcp->lcd_faddr), 0); | |
213 | if (rt == 0) { | |
214 | refuse: lcp->lcd_upper = 0; | |
215 | pk_close(lcp); | |
216 | return; | |
217 | } | |
218 | rt->rt_refcnt--; | |
219 | if ((nrt = RT(rt->rt_llinfo)) == 0 || rt_mask(rt) != x25_dgram_sockmask) | |
220 | goto refuse; | |
221 | if ((nrt->rt_flags & RTF_UP) == 0) { | |
222 | rt->rt_llinfo = (caddr_t)rtalloc1(rt->rt_gateway, 0); | |
223 | rtfree(nrt); | |
224 | if ((nrt = RT(rt->rt_llinfo)) == 0) | |
225 | goto refuse; | |
226 | nrt->rt_refcnt--; | |
227 | } | |
228 | if (nrt->rt_ifa == 0 || nrt->rt_ifa->ifa_rtrequest != x25_rtrequest) | |
229 | goto refuse; | |
230 | lcp->lcd_send(lcp); /* confirm call */ | |
231 | x25_rtattach(lcp, nrt); | |
232 | m_freem(m); | |
233 | } | |
234 | ||
16e7cbfd KS |
235 | /* |
236 | * X.25 output routine. | |
237 | */ | |
039be508 KS |
238 | x25_ifoutput(ifp, m0, dst, rt) |
239 | struct ifnet *ifp; | |
16e7cbfd KS |
240 | struct mbuf *m0; |
241 | struct sockaddr *dst; | |
242 | register struct rtentry *rt; | |
243 | { | |
cd88e354 | 244 | register struct mbuf *m = m0; |
461586fd | 245 | register struct llinfo_x25 *lx; |
039be508 | 246 | struct pklcd *lcp; |
461586fd | 247 | int s, error = 0; |
16e7cbfd | 248 | |
f60b6d8f KS |
249 | int plen; |
250 | for (plen = 0; m; m = m->m_next) | |
251 | plen += m->m_len; | |
252 | m = m0; | |
253 | ||
039be508 | 254 | if ((ifp->if_flags & IFF_UP) == 0) |
461586fd | 255 | senderr(ENETDOWN); |
97565545 KS |
256 | while (rt == 0 || (rt->rt_flags & RTF_GATEWAY)) { |
257 | if (rt) { | |
258 | if (rt->rt_llinfo) { | |
259 | rt = (struct rtentry *)rt->rt_llinfo; | |
260 | continue; | |
261 | } | |
262 | dst = rt->rt_gateway; | |
263 | } | |
16e7cbfd | 264 | if ((rt = rtalloc1(dst, 1)) == 0) |
461586fd KS |
265 | senderr(EHOSTUNREACH); |
266 | rt->rt_refcnt--; | |
16e7cbfd KS |
267 | } |
268 | /* | |
269 | * Sanity checks. | |
270 | */ | |
039be508 | 271 | if ((rt->rt_ifp != ifp) || |
16e7cbfd | 272 | (rt->rt_flags & (RTF_CLONING | RTF_GATEWAY)) || |
4507dea2 | 273 | ((lx = (struct llinfo_x25 *)rt->rt_llinfo) == 0)) { |
16e7cbfd KS |
274 | senderr(ENETUNREACH); |
275 | } | |
f60b6d8f KS |
276 | if ((m->m_flags & M_PKTHDR) == 0) { |
277 | if_x25stats.ifx_nophdr++; | |
278 | m = m_gethdr(M_NOWAIT, MT_HEADER); | |
279 | if (m == 0) | |
280 | senderr(ENOBUFS); | |
281 | m->m_pkthdr.len = plen; | |
282 | m->m_next = m0; | |
283 | } | |
284 | if (plen != m->m_pkthdr.len) { | |
285 | if_x25stats.ifx_wrongplen++; | |
286 | m->m_pkthdr.len = plen; | |
287 | } | |
461586fd KS |
288 | next_circuit: |
289 | lcp = lx->lx_lcd; | |
290 | if (lcp == 0) { | |
291 | lx->lx_lcd = lcp = pk_attach((struct socket *)0); | |
292 | if (lcp == 0) | |
293 | senderr(ENOBUFS); | |
294 | lcp->lcd_upper = x25_connect_callback; | |
295 | lcp->lcd_upnext = (caddr_t)lx; | |
296 | lcp->lcd_packetsize = lx->lx_ia->ia_xc.xc_psize; | |
f60b6d8f | 297 | lcp->lcd_flags = X25_MBS_HOLD; |
039be508 | 298 | } |
461586fd KS |
299 | switch (lcp->lcd_state) { |
300 | case READY: | |
97565545 KS |
301 | if (dst->sa_family == AF_INET && |
302 | ifp->if_type == IFT_X25DDN && | |
303 | rt->rt_gateway->sa_family != AF_CCITT) | |
304 | x25_ddnip_to_ccitt(dst, rt); | |
16e7cbfd | 305 | if (rt->rt_gateway->sa_family != AF_CCITT) { |
16e7cbfd | 306 | if ((rt->rt_flags & RTF_XRESOLVE) == 0) |
461586fd KS |
307 | senderr(EHOSTUNREACH); |
308 | } else if (x25_autoconnect) | |
309 | error = pk_connect(lcp, | |
310 | (struct sockaddr_x25 *)rt->rt_gateway); | |
311 | if (error) | |
312 | senderr(error); | |
16e7cbfd | 313 | /* FALLTHROUGH */ |
461586fd KS |
314 | case SENT_CALL: |
315 | case DATA_TRANSFER: | |
316 | if (sbspace(&lcp->lcd_sb) < 0) { | |
317 | lx = lx->lx_next; | |
318 | if (lx->lx_rt != rt) | |
319 | senderr(ENOSPC); | |
320 | goto next_circuit; | |
321 | } | |
322 | if (lx->lx_ia) | |
323 | lcp->lcd_dg_timer = | |
324 | lx->lx_ia->ia_xc.xc_dg_idletimo; | |
6c58e9b2 | 325 | pk_send(lcp, m); |
039be508 | 326 | break; |
16e7cbfd KS |
327 | default: |
328 | /* | |
329 | * We count on the timer routine to close idle | |
330 | * connections, if there are not enough circuits to go | |
331 | * around. | |
332 | * | |
333 | * So throw away data for now. | |
334 | * After we get it all working, we'll rewrite to handle | |
335 | * actively closing connections (other than by timers), | |
336 | * when circuits get tight. | |
337 | * | |
338 | * In the DDN case, the imp itself closes connections | |
339 | * under heavy load. | |
340 | */ | |
341 | error = ENOBUFS; | |
342 | bad: | |
343 | if (m) | |
344 | m_freem(m); | |
345 | } | |
16e7cbfd KS |
346 | return (error); |
347 | } | |
348 | ||
349 | /* | |
039be508 | 350 | * Simpleminded timer routine. |
16e7cbfd | 351 | */ |
039be508 KS |
352 | x25_iftimeout(ifp) |
353 | struct ifnet *ifp; | |
16e7cbfd | 354 | { |
039be508 | 355 | register struct pkcb *pkcb = 0; |
039be508 | 356 | register struct pklcd **lcpp, *lcp; |
16e7cbfd KS |
357 | int s = splimp(); |
358 | ||
cd88e354 KS |
359 | for (pkcb = pkcbhead; pkcb; pkcb = pkcb->pk_next) |
360 | if (pkcb->pk_ia->ia_ifp == ifp) | |
039be508 | 361 | for (lcpp = pkcb->pk_chan + pkcb->pk_maxlcn; |
c4b47c42 | 362 | --lcpp > pkcb->pk_chan;) |
039be508 KS |
363 | if ((lcp = *lcpp) && |
364 | lcp->lcd_state == DATA_TRANSFER && | |
4507dea2 | 365 | (lcp->lcd_flags & X25_DG_CIRCUIT) && |
c4b47c42 | 366 | (lcp->lcd_dg_timer && --lcp->lcd_dg_timer == 0)) { |
461586fd | 367 | lcp->lcd_upper(lcp, 0); |
c4b47c42 | 368 | } |
16e7cbfd KS |
369 | splx(s); |
370 | } | |
16e7cbfd | 371 | /* |
461586fd | 372 | * This routine gets called when validating additions of new routes |
97565545 | 373 | * or deletions of old ones. |
c4b47c42 | 374 | */ |
cd88e354 | 375 | x25_rtrequest(cmd, rt, dst) |
c4b47c42 KS |
376 | register struct rtentry *rt; |
377 | struct sockaddr *dst; | |
378 | { | |
379 | register struct llinfo_x25 *lx = (struct llinfo_x25 *)rt->rt_llinfo; | |
380 | register struct sockaddr_x25 *sa =(struct sockaddr_x25 *)rt->rt_gateway; | |
381 | register struct pklcd *lcp; | |
c4b47c42 | 382 | |
461586fd KS |
383 | if (rt->rt_flags & RTF_GATEWAY) { |
384 | if (rt->rt_llinfo) | |
385 | RTFREE((struct rtentry *)rt->rt_llinfo); | |
386 | rt->rt_llinfo = (cmd == RTM_ADD) ? | |
387 | (caddr_t)rtalloc1(rt->rt_gateway, 1) : 0; | |
6c58e9b2 KS |
388 | return; |
389 | } | |
97565545 KS |
390 | if ((rt->rt_flags & RTF_HOST) == 0) |
391 | return; | |
461586fd KS |
392 | if (cmd == RTM_DELETE) { |
393 | while (rt->rt_llinfo) | |
394 | x25_lxfree((struct llinfo *)rt->rt_llinfo); | |
395 | x25_rtinvert(RTM_DELETE, rt->rt_gateway, rt); | |
c4b47c42 KS |
396 | return; |
397 | } | |
97565545 KS |
398 | if (lx == 0 && (lx = x25_lxalloc(rt)) == 0) |
399 | return; | |
461586fd KS |
400 | if ((lcp = lx->lx_lcd) && lcp->lcd_state != READY) { |
401 | /* | |
402 | * This can only happen on a RTM_CHANGE operation | |
403 | * though cmd will be RTM_ADD. | |
404 | */ | |
405 | if (lcp->lcd_ceaddr && | |
406 | Bcmp(rt->rt_gateway, lcp->lcd_ceaddr, | |
407 | lcp->lcd_ceaddr->x25_len) != 0) { | |
408 | x25_rtinvert(RTM_DELETE, lcp->lcd_ceaddr, rt); | |
409 | lcp->lcd_upper = 0; | |
410 | pk_disconnect(lcp); | |
411 | } | |
c4b47c42 KS |
412 | lcp = 0; |
413 | } | |
461586fd KS |
414 | x25_rtinvert(RTM_ADD, rt->rt_gateway, rt); |
415 | } | |
416 | ||
cd88e354 | 417 | int x25_dont_rtinvert = 0; |
97565545 | 418 | |
461586fd KS |
419 | x25_rtinvert(cmd, sa, rt) |
420 | register struct sockaddr *sa; | |
421 | register struct rtentry *rt; | |
422 | { | |
423 | struct rtentry *rt2 = 0; | |
424 | /* | |
425 | * rt_gateway contains PID indicating which proto | |
426 | * family on the other end, so will be different | |
427 | * from general host route via X.25. | |
428 | */ | |
cd88e354 | 429 | if (rt->rt_ifp->if_type == IFT_X25DDN || x25_dont_rtinvert) |
c4b47c42 | 430 | return; |
461586fd KS |
431 | if (sa->sa_family != AF_CCITT) |
432 | return; | |
cd88e354 KS |
433 | if (cmd != RTM_DELETE) { |
434 | rtrequest(RTM_ADD, sa, rt_key(rt), x25_dgram_sockmask, | |
435 | RTF_PROTO2, &rt2); | |
461586fd KS |
436 | if (rt2) { |
437 | rt2->rt_llinfo = (caddr_t) rt; | |
438 | rt->rt_refcnt++; | |
c4b47c42 | 439 | } |
461586fd | 440 | return; |
c4b47c42 | 441 | } |
461586fd KS |
442 | rt2 = rt; |
443 | if ((rt = rtalloc1(sa, 0)) == 0 || | |
cd88e354 KS |
444 | (rt->rt_flags & RTF_PROTO2) == 0 || |
445 | rt->rt_llinfo != (caddr_t)rt2) { | |
461586fd KS |
446 | printf("x25_rtchange: inverse route screwup\n"); |
447 | return; | |
448 | } else | |
449 | rt2->rt_refcnt--; | |
cd88e354 KS |
450 | rtrequest(RTM_DELETE, sa, rt_key(rt2), x25_dgram_sockmask, |
451 | 0, (struct rtentry **) 0); | |
c4b47c42 KS |
452 | } |
453 | ||
16e7cbfd KS |
454 | static struct sockaddr_x25 blank_x25 = {sizeof blank_x25, AF_CCITT}; |
455 | /* | |
456 | * IP to X25 address routine copyright ACC, used by permission. | |
457 | */ | |
c4b47c42 KS |
458 | union imp_addr { |
459 | struct in_addr ip; | |
460 | struct imp { | |
461 | u_char s_net; | |
462 | u_char s_host; | |
463 | u_char s_lh; | |
464 | u_char s_impno; | |
465 | } imp; | |
466 | }; | |
467 | ||
461586fd KS |
468 | /* |
469 | * The following is totally bogus and here only to preserve | |
470 | * the IP to X.25 translation. | |
471 | */ | |
472 | x25_ddnip_to_ccitt(src, rt) | |
16e7cbfd | 473 | struct sockaddr_in *src; |
461586fd | 474 | register struct rtentry *rt; |
16e7cbfd | 475 | { |
461586fd | 476 | register struct sockaddr_x25 *dst = (struct sockaddr_x25 *)rt->rt_gateway; |
16e7cbfd | 477 | union imp_addr imp_addr; |
4507dea2 KS |
478 | int imp_no, imp_port, temp; |
479 | char *x25addr = dst->x25_addr; | |
16e7cbfd KS |
480 | |
481 | ||
4507dea2 | 482 | imp_addr.ip = src->sin_addr; |
16e7cbfd KS |
483 | *dst = blank_x25; |
484 | if ((imp_addr.imp.s_net & 0x80) == 0x00) { /* class A */ | |
485 | imp_no = imp_addr.imp.s_impno; | |
486 | imp_port = imp_addr.imp.s_host; | |
487 | } else if ((imp_addr.imp.s_net & 0xc0) == 0x80) { /* class B */ | |
488 | imp_no = imp_addr.imp.s_impno; | |
489 | imp_port = imp_addr.imp.s_lh; | |
490 | } else { /* class C */ | |
491 | imp_no = imp_addr.imp.s_impno / 32; | |
492 | imp_port = imp_addr.imp.s_impno % 32; | |
493 | } | |
494 | ||
495 | x25addr[0] = 12; /* length */ | |
496 | /* DNIC is cleared by struct copy above */ | |
497 | ||
498 | if (imp_port < 64) { /* Physical: 0000 0 IIIHH00 [SS] *//* s_impno | |
499 | * -> III, s_host -> HH */ | |
500 | x25addr[5] = 0; /* set flag bit */ | |
501 | x25addr[6] = imp_no / 100; | |
502 | x25addr[7] = (imp_no % 100) / 10; | |
503 | x25addr[8] = imp_no % 10; | |
504 | x25addr[9] = imp_port / 10; | |
505 | x25addr[10] = imp_port % 10; | |
506 | } else { /* Logical: 0000 1 RRRRR00 [SS] *//* s | |
507 | * _host * 256 + s_impno -> RRRRR */ | |
508 | temp = (imp_port << 8) + imp_no; | |
509 | x25addr[5] = 1; | |
510 | x25addr[6] = temp / 10000; | |
511 | x25addr[7] = (temp % 10000) / 1000; | |
512 | x25addr[8] = (temp % 1000) / 100; | |
513 | x25addr[9] = (temp % 100) / 10; | |
514 | x25addr[10] = temp % 10; | |
515 | } | |
516 | } | |
517 | ||
16e7cbfd | 518 | /* |
c4b47c42 KS |
519 | * This routine is a sketch and is not to be believed!!!!! |
520 | * | |
16e7cbfd KS |
521 | * This is a utility routine to be called by x25 devices when a |
522 | * call request is honored with the intent of starting datagram forwarding. | |
523 | */ | |
039be508 | 524 | x25_dg_rtinit(dst, ia, af) |
16e7cbfd | 525 | struct sockaddr_x25 *dst; |
4507dea2 | 526 | register struct x25_ifaddr *ia; |
16e7cbfd KS |
527 | { |
528 | struct sockaddr *sa = 0; | |
4507dea2 KS |
529 | struct rtentry *rt; |
530 | struct in_addr my_addr; | |
461586fd | 531 | static struct sockaddr_in sin = {sizeof(sin), AF_INET}; |
4507dea2 KS |
532 | |
533 | if (ia->ia_ifp->if_type == IFT_X25DDN && af == AF_INET) { | |
16e7cbfd | 534 | /* |
4507dea2 | 535 | * Inverse X25 to IP mapping copyright and courtesy ACC. |
16e7cbfd KS |
536 | */ |
537 | int imp_no, imp_port, temp; | |
538 | union imp_addr imp_addr; | |
539 | { | |
540 | /* | |
541 | * First determine our IP addr for network | |
542 | */ | |
4507dea2 | 543 | register struct in_ifaddr *ina; |
16e7cbfd | 544 | extern struct in_ifaddr *in_ifaddr; |
4507dea2 KS |
545 | |
546 | for (ina = in_ifaddr; ina; ina = ina->ia_next) | |
547 | if (ina->ia_ifp == ia->ia_ifp) { | |
548 | my_addr = ina->ia_addr.sin_addr; | |
16e7cbfd KS |
549 | break; |
550 | } | |
551 | } | |
552 | { | |
553 | ||
554 | register char *x25addr = dst->x25_addr; | |
555 | ||
556 | switch (x25addr[5] & 0x0f) { | |
557 | case 0: /* Physical: 0000 0 IIIHH00 [SS] */ | |
558 | imp_no = | |
559 | ((int) (x25addr[6] & 0x0f) * 100) + | |
560 | ((int) (x25addr[7] & 0x0f) * 10) + | |
561 | ((int) (x25addr[8] & 0x0f)); | |
562 | ||
563 | ||
564 | imp_port = | |
565 | ((int) (x25addr[9] & 0x0f) * 10) + | |
566 | ((int) (x25addr[10] & 0x0f)); | |
567 | break; | |
568 | case 1: /* Logical: 0000 1 RRRRR00 [SS] */ | |
569 | temp = ((int) (x25addr[6] & 0x0f) * 10000) | |
570 | + ((int) (x25addr[7] & 0x0f) * 1000) | |
571 | + ((int) (x25addr[8] & 0x0f) * 100) | |
572 | + ((int) (x25addr[9] & 0x0f) * 10) | |
573 | + ((int) (x25addr[10] & 0x0f)); | |
574 | ||
575 | imp_port = temp >> 8; | |
576 | imp_no = temp & 0xff; | |
577 | break; | |
578 | default: | |
579 | return (0L); | |
580 | } | |
4507dea2 | 581 | imp_addr.ip = my_addr; |
16e7cbfd KS |
582 | if ((imp_addr.imp.s_net & 0x80) == 0x00) { |
583 | /* class A */ | |
584 | imp_addr.imp.s_host = imp_port; | |
585 | imp_addr.imp.s_impno = imp_no; | |
586 | imp_addr.imp.s_lh = 0; | |
587 | } else if ((imp_addr.imp.s_net & 0xc0) == 0x80) { | |
588 | /* class B */ | |
589 | imp_addr.imp.s_lh = imp_port; | |
590 | imp_addr.imp.s_impno = imp_no; | |
591 | } else { | |
592 | /* class C */ | |
593 | imp_addr.imp.s_impno = (imp_no << 5) + imp_port; | |
594 | } | |
595 | } | |
596 | sin.sin_addr = imp_addr.ip; | |
597 | sa = (struct sockaddr *)&sin; | |
598 | } else { | |
599 | /* | |
600 | * This uses the X25 routing table to do inverse | |
601 | * lookup of x25 address to sockaddr. | |
602 | */ | |
16e7cbfd KS |
603 | if (rt = rtalloc1(dst, 0)) { |
604 | sa = rt->rt_gateway; | |
605 | rt->rt_refcnt--; | |
606 | } | |
16e7cbfd KS |
607 | } |
608 | /* | |
609 | * Call to rtalloc1 will create rtentry for reverse path | |
610 | * to callee by virtue of cloning magic and will allocate | |
611 | * space for local control block. | |
612 | */ | |
4507dea2 | 613 | if (sa && (rt = rtalloc1(sa, 1))) |
16e7cbfd KS |
614 | rt->rt_refcnt--; |
615 | } | |
cd88e354 KS |
616 | #ifndef _offsetof |
617 | #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m)) | |
618 | #endif | |
619 | struct sockaddr_x25 x25_dgmask = { | |
620 | _offsetof(struct sockaddr_x25, x25_udata[1]), /* _len */ | |
621 | 0, /* _family */ | |
622 | 0, /* _net */ | |
623 | { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, /* _addr */ | |
624 | {0}, /* opts */ | |
625 | -1, /* _udlen */ | |
626 | {-1} /* _udata */ | |
627 | }; | |
628 | int x25_startproto = 1; | |
b84e7ca8 KS |
629 | |
630 | pk_init() | |
631 | { | |
632 | /* | |
633 | * warning, sizeof (struct sockaddr_x25) > 32, | |
634 | * but contains no data of interest beyond 32 | |
635 | */ | |
cd88e354 | 636 | struct radix_node *rn_addmask(); |
4357c4f0 | 637 | rn_inithead(&rt_tables[AF_CCITT], 32); |
cd88e354 KS |
638 | x25_dgram_sockmask = |
639 | SA(rn_addmask((caddr_t)&x25_dgmask, 0, 4)->rn_key); | |
640 | if (x25_startproto) { | |
641 | pk_protolisten(0xcc, 1, x25_dgram_incoming); | |
642 | pk_protolisten(0x81, 1, x25_dgram_incoming); | |
643 | } | |
b84e7ca8 | 644 | } |
cd88e354 KS |
645 | |
646 | struct x25_dgproto { | |
647 | u_char spi; | |
648 | u_char spilen; | |
649 | int (*f)(); | |
650 | } x25_dgprototab[] = { | |
651 | #if defined(ISO) && defined(TPCONS) | |
652 | { 0x0, 0, tp_incoming}, | |
653 | #endif | |
654 | { 0xcc, 1, x25_dgram_incoming}, | |
655 | { 0xcd, 1, x25_dgram_incoming}, | |
656 | { 0x81, 1, x25_dgram_incoming}, | |
657 | }; | |
658 | ||
659 | pk_user_protolisten(info) | |
660 | register u_char *info; | |
661 | { | |
662 | register struct x25_dgproto *dp = x25_dgprototab | |
663 | + ((sizeof x25_dgprototab) / (sizeof *dp)); | |
664 | register struct pklcd *lcp; | |
665 | ||
666 | while (dp > x25_dgprototab) | |
667 | if ((--dp)->spi == info[0]) | |
668 | goto gotspi; | |
669 | return ESRCH; | |
670 | ||
671 | gotspi: if (info[1]) | |
672 | return pk_protolisten(dp->spi, dp->spilen, dp->f); | |
673 | for (lcp = pk_listenhead; lcp; lcp = lcp->lcd_listen) | |
674 | if (lcp->lcd_laddr.x25_udlen == dp->spilen && | |
675 | Bcmp(&dp->spi, lcp->lcd_laddr.x25_udata, dp->spilen) == 0) { | |
363d209b | 676 | pk_disconnect(lcp); |
cd88e354 KS |
677 | return 0; |
678 | } | |
679 | return ESRCH; | |
680 | } | |
681 | ||
461586fd | 682 | /* |
cd88e354 KS |
683 | * This routine transfers an X.25 circuit to or from a routing entry. |
684 | * If the supplied circuit is * in DATA_TRANSFER state, it is added to the | |
685 | * routing entry. If freshly allocated, it glues back the vc from | |
686 | * the rtentry to the socket. | |
461586fd KS |
687 | */ |
688 | pk_rtattach(so, m0) | |
689 | register struct socket *so; | |
690 | struct mbuf *m0; | |
691 | { | |
692 | register struct pklcd *lcp = (struct pklcd *)so->so_pcb; | |
693 | register struct mbuf *m = m0; | |
694 | struct sockaddr *dst = mtod(m, struct sockaddr *); | |
695 | register struct rtentry *rt = rtalloc1(dst, 0); | |
696 | register struct llinfo_x25 *lx; | |
697 | caddr_t cp; | |
698 | #define ROUNDUP(a) \ | |
699 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) | |
700 | #define transfer_sockbuf(s, f, l) \ | |
cd88e354 KS |
701 | while (m = (s)->sb_mb)\ |
702 | {(s)->sb_mb = m->m_act; m->m_act = 0; sbfree((s), m); f(l, m);} | |
461586fd KS |
703 | |
704 | if (rt) | |
705 | rt->rt_refcnt--; | |
706 | cp = (dst->sa_len < m->m_len) ? ROUNDUP(dst->sa_len) + (caddr_t)dst : 0; | |
707 | while (rt && | |
708 | ((cp == 0 && rt_mask(rt) != 0) || | |
709 | (cp != 0 && (rt_mask(rt) == 0 || | |
710 | Bcmp(cp, rt_mask(rt), rt_mask(rt)->sa_len)) != 0))) | |
711 | rt = (struct rtentry *)rt->rt_nodes->rn_dupedkey; | |
712 | if (rt == 0 || (rt->rt_flags & RTF_GATEWAY) || | |
713 | (lx = (struct llinfo_x25 *)rt->rt_llinfo) == 0) | |
714 | return ESRCH; | |
cd88e354 KS |
715 | if (lcp == 0) |
716 | return ENOTCONN; | |
717 | switch (lcp->lcd_state) { | |
718 | default: | |
461586fd | 719 | return ENOTCONN; |
cd88e354 KS |
720 | |
721 | case READY: | |
722 | /* Detach VC from rtentry */ | |
723 | if (lx->lx_lcd == 0) | |
724 | return ENOTCONN; | |
725 | lcp->lcd_so = 0; | |
726 | pk_close(lcp); | |
727 | lcp = lx->lx_lcd; | |
728 | if (lx->lx_next->lx_rt == rt) | |
729 | x25_lxfree(lx); | |
730 | lcp->lcd_so = so; | |
731 | lcp->lcd_upper = 0; | |
732 | lcp->lcd_upnext = 0; | |
733 | transfer_sockbuf(&lcp->lcd_sb, sbappendrecord, &so->so_snd); | |
734 | soisconnected(so); | |
735 | return 0; | |
736 | ||
737 | case DATA_TRANSFER: | |
738 | /* Add VC to rtentry */ | |
739 | lcp->lcd_so = 0; | |
740 | lcp->lcd_sb = so->so_snd; /* structure copy */ | |
741 | bzero((caddr_t)&so->so_snd, sizeof(so->so_snd)); /* XXXXXX */ | |
742 | so->so_pcb = 0; | |
743 | x25_rtattach(lcp, rt); | |
744 | transfer_sockbuf(&so->so_rcv, x25_ifinput, lcp); | |
745 | soisdisconnected(so); | |
746 | } | |
747 | return 0; | |
748 | } | |
749 | x25_rtattach(lcp0, rt) | |
750 | register struct pklcd *lcp0; | |
751 | struct rtentry *rt; | |
752 | { | |
753 | register struct llinfo_x25 *lx = (struct llinfo_x25 *)rt->rt_llinfo; | |
754 | register struct pklcd *lcp; | |
755 | register struct mbuf *m; | |
461586fd KS |
756 | if (lcp = lx->lx_lcd) { /* adding an additional VC */ |
757 | if (lcp->lcd_state == READY) { | |
cd88e354 | 758 | transfer_sockbuf(&lcp->lcd_sb, pk_output, lcp0); |
461586fd KS |
759 | lcp->lcd_upper = 0; |
760 | pk_close(lcp); | |
761 | } else { | |
762 | lx = x25_lxalloc(rt); | |
763 | if (lx == 0) | |
764 | return ENOBUFS; | |
765 | } | |
766 | } | |
cd88e354 | 767 | lx->lx_lcd = lcp = lcp0; |
461586fd KS |
768 | lcp->lcd_upper = x25_ifinput; |
769 | lcp->lcd_upnext = (caddr_t)lx; | |
461586fd | 770 | } |