Commit | Line | Data |
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41e530c7 | 1 | /* if_imp.c 4.5 82/02/16 */ |
6c73ade6 BJ |
2 | |
3 | #include "imp.h" | |
4 | #if NIMP > 0 | |
5 | /* | |
6 | * ARPAnet IMP interface driver. | |
7 | * | |
8 | * The IMP-host protocol is handled here, leaving | |
9 | * hardware specifics to the lower level interface driver. | |
a2cd4df7 BJ |
10 | * |
11 | * TODO: | |
12 | * rethink coupling between this module and device driver | |
13 | * pass more error indications up to protocol modules | |
6c73ade6 BJ |
14 | */ |
15 | #include "../h/param.h" | |
16 | #include "../h/systm.h" | |
17 | #include "../h/mbuf.h" | |
18 | #include "../h/pte.h" | |
19 | #include "../h/buf.h" | |
20 | #include "../h/protosw.h" | |
21 | #include "../h/socket.h" | |
22 | #include "../h/ubareg.h" | |
23 | #include "../h/ubavar.h" | |
24 | #include "../h/cpu.h" | |
25 | #include "../h/mtpr.h" | |
26 | #include "../h/vmmac.h" | |
27 | #include "../net/in.h" | |
28 | #include "../net/in_systm.h" | |
29 | #include "../net/if.h" | |
30 | #include "../net/if_imp.h" | |
41e530c7 | 31 | #include "../net/if_imphost.h" |
6c73ade6 BJ |
32 | #include "../net/ip.h" |
33 | #include "../net/ip_var.h" | |
34 | ||
35 | /* | |
36 | * IMP software status per interface. | |
37 | * (partially shared with the hardware specific module) | |
38 | * | |
39 | * Each interface is referenced by a network interface structure, | |
40 | * imp_if, which the routing code uses to locate the interface. | |
41 | * This structure contains the output queue for the interface, its | |
42 | * address, ... IMP specific structures used in connecting the | |
43 | * IMP software modules to the hardware specific interface routines | |
a2cd4df7 BJ |
44 | * are stored here. The common structures are made visible to the |
45 | * interface driver by passing a pointer to the hardware routine | |
46 | * at "attach" time. | |
6c73ade6 BJ |
47 | * |
48 | * NOTE: imp_if and imp_cb are assumed adjacent in hardware code. | |
49 | */ | |
50 | struct imp_softc { | |
51 | struct ifnet imp_if; /* network visible interface */ | |
52 | struct impcb imp_cb; /* hooks to hardware module */ | |
53 | u_char imp_state; /* current state of IMP */ | |
54 | char imp_dropcnt; /* used during initialization */ | |
6c73ade6 BJ |
55 | } imp_softc[NIMP]; |
56 | ||
57 | /* | |
58 | * Messages from IMP regarding why | |
59 | * it's going down. | |
60 | */ | |
61 | static char *impmsg[] = { | |
62 | "in 30 seconds", | |
63 | "for hardware PM", | |
64 | "to reload software", | |
65 | "for emergency reset" | |
66 | }; | |
67 | ||
a2cd4df7 BJ |
68 | int impdown(), impinit(), impoutput(); |
69 | ||
6c73ade6 BJ |
70 | /* |
71 | * IMP attach routine. Called from hardware device attach routine | |
72 | * at configuration time with a pointer to the UNIBUS device structure. | |
73 | * Sets up local state and returns pointer to base of ifnet+impcb | |
74 | * structures. This is then used by the device's attach routine | |
75 | * set up its back pointers. | |
76 | */ | |
77 | impattach(ui) | |
78 | struct uba_device *ui; | |
79 | { | |
80 | struct imp_softc *sc = &imp_softc[ui->ui_unit]; | |
81 | register struct ifnet *ifp = &sc->imp_if; | |
82 | ||
83 | COUNT(IMPATTACH); | |
84 | /* UNIT COULD BE AMBIGUOUS */ | |
85 | ifp->if_unit = ui->ui_unit; | |
86 | ifp->if_name = "imp"; | |
87 | ifp->if_mtu = IMP_MTU; | |
88 | ifp->if_net = ui->ui_flags; | |
a2cd4df7 BJ |
89 | #ifdef notdef |
90 | /* this should get cleaned after we talk to the imp */ | |
91 | ifp->if_addr = if_makeaddr(ifp->if_net, ifp->if_host); | |
92 | #endif | |
93 | ifp->if_init = impinit; | |
94 | ifp->if_output = impoutput; | |
95 | /* reset is handled at the hardware level */ | |
6c73ade6 BJ |
96 | if_attach(ifp); |
97 | /* kludge to hand pointers back to hardware attach routine */ | |
98 | return ((int)&sc->imp_if); | |
99 | } | |
100 | ||
101 | /* | |
102 | * IMP initialization routine: call hardware module to | |
103 | * setup UNIBUS resources, init state and get ready for | |
104 | * NOOPs the IMP should send us, and that we want to drop. | |
105 | */ | |
106 | impinit(unit) | |
107 | int unit; | |
108 | { | |
109 | register struct imp_softc *sc = &imp_softc[unit]; | |
110 | ||
a2cd4df7 BJ |
111 | if ((*sc->imp_cb.ic_init)(unit) == 0) { |
112 | sc->imp_state = IMPS_DOWN; | |
113 | return; | |
114 | } | |
6c73ade6 BJ |
115 | sc->imp_state = IMPS_INIT; |
116 | sc->imp_dropcnt = IMP_DROPCNT; | |
a2cd4df7 | 117 | impnoops(sc); |
6c73ade6 BJ |
118 | } |
119 | ||
120 | struct sockproto impproto = { PF_IMPLINK }; | |
faad37c0 SL |
121 | struct sockaddr_in impdst = { AF_IMPLINK }; |
122 | struct sockaddr_in impsrc = { AF_IMPLINK }; | |
6c73ade6 BJ |
123 | |
124 | /* | |
125 | * ARPAnet 1822 input routine. | |
126 | * Called from hardware input interrupt routine to handle 1822 | |
127 | * IMP-host messages. Type 0 messages (non-control) are | |
128 | * passed to higher level protocol processors on the basis | |
129 | * of link number. Other type messages (control) are handled here. | |
130 | */ | |
a2cd4df7 | 131 | impinput(unit, m) |
6c73ade6 | 132 | int unit; |
a2cd4df7 | 133 | register struct mbuf *m; |
6c73ade6 BJ |
134 | { |
135 | int s; | |
6c73ade6 BJ |
136 | register struct imp_leader *ip; |
137 | register struct imp_softc *sc = &imp_softc[unit]; | |
138 | register struct host *hp; | |
139 | register struct ifqueue *inq; | |
a2cd4df7 | 140 | struct control_leader *cp; |
6c73ade6 BJ |
141 | struct in_addr addr; |
142 | ||
143 | COUNT(IMP_INPUT); | |
a0b7c7fb | 144 | /* |
a2cd4df7 BJ |
145 | * Verify leader length. Be careful with control |
146 | * message which don't get a length included. | |
a0b7c7fb SL |
147 | * We should generate a "bad leader" message |
148 | * to the IMP about messages too short. | |
149 | */ | |
a2cd4df7 BJ |
150 | if (m->m_len < sizeof(struct control_leader) && |
151 | (m = m_pullup(m, sizeof(struct control_leader))) == 0) | |
152 | return; | |
153 | cp = mtod(m, struct control_leader *); | |
154 | if (cp->dl_mtype == IMPTYPE_DATA) | |
155 | if (m->m_len < sizeof(struct imp_leader) && | |
156 | (m = m_pullup(m, sizeof(struct imp_leader))) == 0) | |
157 | return; | |
6c73ade6 BJ |
158 | ip = mtod(m, struct imp_leader *); |
159 | ||
a0b7c7fb SL |
160 | /* |
161 | * Check leader type -- should notify IMP | |
162 | * in case of failure... | |
163 | */ | |
a2cd4df7 BJ |
164 | if (ip->il_format != IMP_NFF) { |
165 | sc->imp_if.if_collisions++; /* XXX */ | |
6c73ade6 | 166 | goto drop; |
a2cd4df7 | 167 | } |
6c73ade6 BJ |
168 | |
169 | /* | |
170 | * Certain messages require a host structure. | |
171 | * Do this in one shot here. | |
172 | */ | |
173 | switch (ip->il_mtype) { | |
174 | ||
175 | case IMPTYPE_RFNM: | |
176 | case IMPTYPE_INCOMPLETE: | |
177 | case IMPTYPE_HOSTDEAD: | |
178 | case IMPTYPE_HOSTUNREACH: | |
179 | case IMPTYPE_BADDATA: | |
41e530c7 | 180 | #ifdef notdef |
a2cd4df7 | 181 | addr.s_net = ip->il_network; |
41e530c7 BJ |
182 | #else |
183 | addr.s_net = 0; | |
184 | #endif | |
a2cd4df7 BJ |
185 | addr.s_imp = ip->il_imp; |
186 | addr.s_host = ip->il_host; | |
187 | hp = hostlookup(addr); | |
6c73ade6 BJ |
188 | break; |
189 | } | |
190 | ||
191 | switch (ip->il_mtype) { | |
192 | ||
193 | /* | |
194 | * Data for a protocol. Dispatch to the appropriate | |
195 | * protocol routine (running at software interrupt). | |
196 | * If this isn't a raw interface, advance pointer | |
a0b7c7fb | 197 | * into mbuf past leader (done below). |
6c73ade6 BJ |
198 | */ |
199 | case IMPTYPE_DATA: | |
a2cd4df7 BJ |
200 | ip->il_length = |
201 | (ntohs(ip->il_length) >> 3) - sizeof(struct imp_leader); | |
6c73ade6 BJ |
202 | break; |
203 | ||
204 | /* | |
205 | * IMP leader error. Reset the IMP and discard the packet. | |
206 | */ | |
207 | case IMPTYPE_BADLEADER: | |
a0b7c7fb SL |
208 | /* |
209 | * According to 1822 document, this message | |
210 | * will be generated in response to the | |
211 | * first noop sent to the IMP after | |
212 | * the host resets the IMP interface. | |
213 | */ | |
a2cd4df7 | 214 | if (sc->imp_state != IMPS_INIT) { |
a0b7c7fb | 215 | imperr(sc, "leader error"); |
a2cd4df7 | 216 | hostreset(sc->imp_if.if_net); /* XXX */ |
a0b7c7fb SL |
217 | impnoops(sc); |
218 | } | |
6c73ade6 BJ |
219 | goto drop; |
220 | ||
221 | /* | |
222 | * IMP going down. Print message, and if not immediate, | |
223 | * set off a timer to insure things will be reset at the | |
224 | * appropriate time. | |
225 | */ | |
226 | case IMPTYPE_DOWN: | |
227 | if ((ip->il_link & IMP_DMASK) == 0) { | |
228 | sc->imp_state = IMPS_GOINGDOWN; | |
a2cd4df7 | 229 | timeout(impdown, sc, 30 * hz); |
6c73ade6 BJ |
230 | } |
231 | imperr(sc, "going down %s", impmsg[ip->il_link & IMP_DMASK]); | |
232 | goto drop; | |
233 | ||
234 | /* | |
235 | * A NOP usually seen during the initialization sequence. | |
236 | * Compare the local address with that in the message. | |
237 | * Reset the local address notion if it doesn't match. | |
238 | */ | |
a2cd4df7 BJ |
239 | case IMPTYPE_NOOP: { |
240 | register struct in_addr *sin; | |
241 | ||
a0b7c7fb SL |
242 | if (sc->imp_state == IMPS_DOWN) { |
243 | sc->imp_state = IMPS_INIT; | |
244 | sc->imp_dropcnt = IMP_DROPCNT; | |
245 | } | |
a2cd4df7 BJ |
246 | if (sc->imp_state != IMPS_INIT) |
247 | goto drop; | |
248 | if (--sc->imp_dropcnt > 0) | |
249 | goto drop; | |
250 | sc->imp_state = IMPS_UP; | |
251 | sin = &sc->imp_if.if_addr; | |
252 | sc->imp_if.if_host[0] = sin->s_host = ip->il_host; | |
253 | sin->s_imp = ip->il_imp; | |
254 | imperr(sc, "reset (host %d/imp %d)", ip->il_host, | |
255 | ntohs(ip->il_imp)); | |
256 | /* restart output in case something was q'd */ | |
257 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); | |
6c73ade6 | 258 | goto drop; |
a2cd4df7 | 259 | } |
6c73ade6 BJ |
260 | |
261 | /* | |
262 | * RFNM or INCOMPLETE message, record in | |
263 | * host table and prime output routine. | |
264 | * | |
a0b7c7fb | 265 | * SHOULD NOTIFY PROTOCOL ABOUT INCOMPLETES. |
6c73ade6 BJ |
266 | */ |
267 | case IMPTYPE_RFNM: | |
268 | case IMPTYPE_INCOMPLETE: | |
269 | if (hp && hp->h_rfnm) { | |
270 | register struct mbuf *n; | |
271 | ||
272 | hp->h_rfnm--; | |
273 | /* poke holding queue */ | |
274 | if (n = hp->h_q) { | |
a2cd4df7 | 275 | if (n->m_next == n) |
6c73ade6 BJ |
276 | hp->h_q = 0; |
277 | else { | |
a2cd4df7 BJ |
278 | n = n->m_next; |
279 | hp->h_q->m_next = n->m_next; | |
6c73ade6 | 280 | } |
a2cd4df7 BJ |
281 | (void) impsnd(sc, n); |
282 | break; | |
6c73ade6 | 283 | } |
a2cd4df7 BJ |
284 | if (hp->h_rfnm == 0) |
285 | hostfree(hp); | |
6c73ade6 | 286 | } |
41e530c7 | 287 | goto rawlinkin; |
6c73ade6 BJ |
288 | |
289 | /* | |
290 | * Host or IMP can't be reached. Flush any packets | |
291 | * awaiting transmission and release the host structure. | |
292 | * | |
a2cd4df7 | 293 | * TODO: NOTIFY THE PROTOCOL |
6c73ade6 BJ |
294 | */ |
295 | case IMPTYPE_HOSTDEAD: | |
a2cd4df7 BJ |
296 | imperr(sc, "host dead"); /* XXX */ |
297 | goto common; /* XXX */ | |
298 | ||
299 | /* SHOULD SIGNAL ROUTING DAEMON */ | |
6c73ade6 | 300 | case IMPTYPE_HOSTUNREACH: |
a2cd4df7 BJ |
301 | imperr(sc, "host unreachable"); /* XXX */ |
302 | common: | |
6c73ade6 | 303 | if (hp) |
a2cd4df7 | 304 | hostfree(hp); /* won't work right */ |
41e530c7 | 305 | goto rawlinkin; |
6c73ade6 BJ |
306 | |
307 | /* | |
308 | * Error in data. Clear RFNM status for this host and send | |
309 | * noops to the IMP to clear the interface. | |
310 | */ | |
311 | case IMPTYPE_BADDATA: | |
312 | imperr(sc, "data error"); | |
313 | if (hp) | |
314 | hp->h_rfnm = 0; | |
315 | impnoops(sc); | |
41e530c7 | 316 | goto rawlinkin; |
6c73ade6 BJ |
317 | |
318 | /* | |
a0b7c7fb | 319 | * Interface reset. |
6c73ade6 BJ |
320 | */ |
321 | case IMPTYPE_RESET: | |
a0b7c7fb | 322 | imperr(sc, "interface reset"); |
a0b7c7fb | 323 | impnoops(sc); |
6c73ade6 BJ |
324 | goto drop; |
325 | ||
326 | default: | |
327 | sc->imp_if.if_collisions++; /* XXX */ | |
328 | goto drop; | |
329 | } | |
330 | ||
331 | /* | |
332 | * Queue on protocol's input queue. | |
333 | */ | |
334 | switch (ip->il_link) { | |
335 | ||
336 | #ifdef INET | |
337 | case IMPLINK_IP: | |
338 | m->m_len -= sizeof(struct imp_leader); | |
339 | m->m_off += sizeof(struct imp_leader); | |
340 | setipintr(); | |
341 | inq = &ipintrq; | |
342 | break; | |
343 | #endif | |
344 | ||
345 | default: | |
41e530c7 | 346 | rawlinkin: |
6c73ade6 | 347 | impproto.sp_protocol = ip->il_link; |
faad37c0 SL |
348 | impdst.sin_addr = sc->imp_if.if_addr; |
349 | impsrc.sin_addr.s_net = ip->il_network; | |
350 | impsrc.sin_addr.s_host = ip->il_host; | |
351 | impsrc.sin_addr.s_imp = ip->il_imp; | |
a2cd4df7 | 352 | raw_input(m, &impproto, &impdst, &impsrc); |
6c73ade6 BJ |
353 | return; |
354 | } | |
355 | IF_ENQUEUE(inq, m); | |
356 | return; | |
357 | ||
358 | drop: | |
359 | m_freem(m); | |
360 | } | |
361 | ||
a0b7c7fb SL |
362 | /* |
363 | * Bring the IMP down after notification. | |
364 | */ | |
365 | impdown(sc) | |
366 | struct imp_softc *sc; | |
367 | { | |
368 | sc->imp_state = IMPS_DOWN; | |
a2cd4df7 | 369 | imperr(sc, "marked down"); |
a0b7c7fb SL |
370 | /* notify protocols with messages waiting? */ |
371 | } | |
372 | ||
6c73ade6 BJ |
373 | /*VARARGS*/ |
374 | imperr(sc, fmt, a1, a2) | |
375 | struct imp_softc *sc; | |
376 | char *fmt; | |
377 | { | |
378 | printf("imp%d: ", sc->imp_if.if_unit); | |
379 | printf(fmt, a1, a2); | |
380 | printf("\n"); | |
381 | } | |
382 | ||
383 | /* | |
384 | * ARPAnet 1822 output routine. | |
385 | * Called from higher level protocol routines to set up messages for | |
386 | * transmission to the imp. Sets up the header and calls impsnd to | |
387 | * enqueue the message for this IMP's hardware driver. | |
388 | */ | |
389 | impoutput(ifp, m0, pf) | |
390 | register struct ifnet *ifp; | |
391 | struct mbuf *m0; | |
392 | { | |
393 | register struct imp_leader *imp; | |
394 | register struct mbuf *m = m0; | |
a2cd4df7 | 395 | int x, dhost, dimp, dlink, len, dnet; |
6c73ade6 | 396 | |
a2cd4df7 | 397 | COUNT(IMPOUTPUT); |
a2cd4df7 | 398 | #ifdef notdef |
6c73ade6 BJ |
399 | /* |
400 | * Don't even try if the IMP is unavailable. | |
401 | */ | |
a0b7c7fb SL |
402 | x = imp_softc[ifp->if_unit].imp_state; |
403 | if (x == IMPS_DOWN || x == IMPS_GOINGDOWN) | |
404 | goto drop; | |
a2cd4df7 | 405 | #endif |
6c73ade6 BJ |
406 | |
407 | switch (pf) { | |
408 | ||
409 | #ifdef INET | |
410 | case PF_INET: { | |
411 | register struct ip *ip = mtod(m0, struct ip *); | |
412 | ||
a2cd4df7 | 413 | dnet = ip->ip_dst.s_net; |
6c73ade6 BJ |
414 | dhost = ip->ip_dst.s_host; |
415 | dimp = ip->ip_dst.s_imp; | |
416 | dlink = IMPLINK_IP; | |
417 | len = ntohs(ip->ip_len); | |
418 | break; | |
419 | } | |
420 | #endif | |
421 | case PF_IMPLINK: | |
422 | goto leaderexists; | |
423 | ||
424 | default: | |
425 | printf("imp%d: can't encapsulate pf%d\n", ifp->if_unit, pf); | |
a0b7c7fb | 426 | goto drop; |
6c73ade6 BJ |
427 | } |
428 | ||
429 | /* | |
430 | * Add IMP leader. If there's not enough space in the | |
431 | * first mbuf, allocate another. If that should fail, we | |
432 | * drop this sucker. | |
433 | */ | |
434 | if (m->m_off > MMAXOFF || | |
435 | MMINOFF + sizeof(struct imp_leader) > m->m_off) { | |
436 | m = m_get(M_DONTWAIT); | |
a0b7c7fb SL |
437 | if (m == 0) |
438 | goto drop; | |
6c73ade6 BJ |
439 | m->m_next = m0; |
440 | m->m_off = MMINOFF; | |
441 | m->m_len = sizeof(struct imp_leader); | |
442 | } else { | |
443 | m->m_off -= sizeof(struct imp_leader); | |
444 | m->m_len += sizeof(struct imp_leader); | |
445 | } | |
446 | imp = mtod(m, struct imp_leader *); | |
447 | imp->il_format = IMP_NFF; | |
41e530c7 | 448 | imp->il_mtype = IMPTYPE_DATA; |
a2cd4df7 | 449 | imp->il_network = dnet; |
6c73ade6 | 450 | imp->il_host = dhost; |
a2cd4df7 BJ |
451 | imp->il_imp = dimp; |
452 | imp->il_length = htons((len + sizeof(struct imp_leader)) << 3); | |
6c73ade6 | 453 | imp->il_link = dlink; |
41e530c7 | 454 | imp->il_flags = imp->il_htype = imp->il_subtype = 0; |
6c73ade6 BJ |
455 | |
456 | leaderexists: | |
457 | /* | |
458 | * Hand message to impsnd to perform RFNM counting | |
459 | * and eventual transmission. | |
460 | */ | |
461 | return (impsnd(ifp, m)); | |
a0b7c7fb SL |
462 | drop: |
463 | m_freem(m0); | |
464 | return (0); | |
6c73ade6 BJ |
465 | } |
466 | ||
467 | /* | |
468 | * Put a message on an interface's output queue. | |
469 | * Perform RFNM counting: no more than 8 message may be | |
470 | * in flight to any one host. | |
471 | */ | |
472 | impsnd(ifp, m) | |
473 | struct ifnet *ifp; | |
474 | struct mbuf *m; | |
475 | { | |
476 | register struct imp_leader *ip; | |
477 | register struct host *hp; | |
478 | struct impcb *icp; | |
479 | int x; | |
480 | ||
a2cd4df7 | 481 | COUNT(IMPSND); |
6c73ade6 BJ |
482 | ip = mtod(m, struct imp_leader *); |
483 | ||
484 | /* | |
485 | * Do RFNM counting for data messages | |
486 | * (no more than 8 outstanding to any host) | |
487 | */ | |
488 | if (ip->il_mtype == IMPTYPE_DATA) { | |
489 | struct in_addr addr; | |
490 | ||
41e530c7 | 491 | #ifdef notdef |
a2cd4df7 | 492 | addr.s_net = ip->il_network; |
41e530c7 BJ |
493 | #else |
494 | addr.s_net = 0; | |
495 | #endif | |
6c73ade6 BJ |
496 | addr.s_host = ip->il_host; |
497 | addr.s_imp = ip->il_imp; | |
41e530c7 | 498 | x = splimp(); |
a2cd4df7 BJ |
499 | if ((hp = hostlookup(addr)) == 0) |
500 | hp = hostenter(addr); | |
6c73ade6 BJ |
501 | |
502 | /* | |
a0b7c7fb | 503 | * If IMP would block, queue until RFNM |
6c73ade6 BJ |
504 | */ |
505 | if (hp) { | |
506 | register struct mbuf *n; | |
507 | int cnt; | |
508 | ||
509 | if (hp->h_rfnm < 8) { | |
510 | hp->h_rfnm++; | |
41e530c7 | 511 | splx(x); |
6c73ade6 BJ |
512 | goto enque; |
513 | } | |
514 | /* | |
515 | * Keeping the count in the host structure | |
516 | * causes the packing scheme to lose too much. | |
517 | */ | |
a2cd4df7 BJ |
518 | cnt = 0; |
519 | if (n = hp->h_q) | |
520 | for (; n != hp->h_q; n = n->m_next) | |
521 | cnt++; | |
6c73ade6 BJ |
522 | if (cnt >= 8) |
523 | goto drop; | |
a0b7c7fb SL |
524 | |
525 | /* | |
a2cd4df7 | 526 | * Q is kept as circular list with h_q |
a0b7c7fb SL |
527 | * (head) pointing to the last entry. |
528 | */ | |
6c73ade6 | 529 | if ((n = hp->h_q) == 0) |
a2cd4df7 | 530 | hp->h_q = m->m_next = m; |
6c73ade6 | 531 | else { |
a2cd4df7 BJ |
532 | m->m_next = n->m_next; |
533 | hp->h_q = n->m_next = m; | |
6c73ade6 | 534 | } |
41e530c7 | 535 | splx(x); |
6c73ade6 BJ |
536 | goto start; |
537 | } | |
538 | drop: | |
539 | m_freem(m); | |
41e530c7 | 540 | splx(x); |
6c73ade6 BJ |
541 | return (0); |
542 | } | |
543 | enque: | |
544 | x = splimp(); | |
545 | IF_ENQUEUE(&ifp->if_snd, m); | |
546 | splx(x); | |
547 | ||
548 | start: | |
549 | icp = &imp_softc[ifp->if_unit].imp_cb; | |
550 | if (icp->ic_oactive == 0) | |
551 | (*icp->ic_start)(ifp->if_unit); | |
552 | return (1); | |
553 | } | |
554 | ||
555 | /* | |
556 | * Put three 1822 NOOPs at the head of the output queue. | |
557 | * Part of host-IMP initialization procedure. | |
558 | * (Should return success/failure, but noone knows | |
559 | * what to do with this, so why bother?) | |
560 | */ | |
561 | impnoops(sc) | |
562 | register struct imp_softc *sc; | |
563 | { | |
564 | register i; | |
565 | register struct mbuf *m; | |
a2cd4df7 | 566 | register struct control_leader *cp; |
6c73ade6 BJ |
567 | int x; |
568 | ||
a2cd4df7 | 569 | COUNT(IMPNOOPS); |
6c73ade6 BJ |
570 | sc->imp_state = IMPS_INIT; |
571 | sc->imp_dropcnt = IMP_DROPCNT; | |
a2cd4df7 | 572 | for (i = 0; i < IMP_DROPCNT + 1; i++ ) { |
6c73ade6 BJ |
573 | if ((m = m_getclr(M_DONTWAIT)) == 0) |
574 | return; | |
575 | m->m_off = MMINOFF; | |
a2cd4df7 BJ |
576 | m->m_len = sizeof(struct control_leader); |
577 | cp = mtod(m, struct control_leader *); | |
578 | cp->dl_format = IMP_NFF; | |
579 | cp->dl_link = i; | |
580 | cp->dl_mtype = IMPTYPE_NOOP; | |
581 | #ifdef notdef | |
582 | cp->dl_network = sc->imp_if.if_net; /* XXX */ | |
583 | cp->dl_host = sc->imp_if.if_addr.s_host;/* XXX */ | |
584 | cp->dl_imp = sc->imp_if.if_addr.s_imp; /* XXX */ | |
585 | #endif | |
6c73ade6 BJ |
586 | x = splimp(); |
587 | IF_PREPEND(&sc->imp_if.if_snd, m); | |
588 | splx(x); | |
589 | } | |
590 | if (sc->imp_cb.ic_oactive == 0) | |
591 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); | |
592 | } | |
a2cd4df7 | 593 | |
41e530c7 | 594 | #ifdef IMPLEADERS |
a2cd4df7 BJ |
595 | printleader(routine, ip) |
596 | char *routine; | |
597 | register struct imp_leader *ip; | |
598 | { | |
599 | printf("%s: ", routine); | |
600 | printbyte((char *)ip, 12); | |
601 | printf("<fmt=%x,net=%x,flags=%x,mtype=", ip->il_format, ip->il_network, | |
602 | ip->il_flags); | |
603 | if (ip->il_mtype <= IMPTYPE_READY) | |
604 | printf("%s,", impleaders[ip->il_mtype]); | |
605 | else | |
606 | printf("%x,", ip->il_mtype); | |
607 | printf("htype=%x,host=%x,imp=%x,link=", ip->il_htype, ip->il_host, | |
608 | ip->il_impno); | |
609 | if (ip->il_link == IMPLINK_IP) | |
610 | printf("ip,"); | |
611 | else | |
612 | printf("%x,", ip->il_link); | |
613 | printf("subtype=%x,len=%x>\n",ip->il_subtype,ntohs(ip->il_length)>>3); | |
614 | } | |
615 | ||
616 | printbyte(cp, n) | |
617 | register char *cp; | |
618 | int n; | |
619 | { | |
620 | register i, j, c; | |
621 | ||
622 | for (i=0; i<n; i++) { | |
623 | c = *cp++; | |
624 | for (j=0; j<2; j++) | |
625 | putchar("0123456789abcdef"[(c>>((1-j)*4))&0xf]); | |
626 | putchar(' '); | |
627 | } | |
628 | putchar('\n'); | |
629 | } | |
6c73ade6 | 630 | #endif |
41e530c7 | 631 | #endif |