Commit | Line | Data |
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e431883e | 1 | /* if_imp.c 4.19 82/03/19 */ |
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 | */ | |
e33b5b1a | 61 | static char *impmessage[] = { |
6c73ade6 BJ |
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"; | |
e431883e | 87 | ifp->if_mtu = IMPMTU - sizeof(struct imp_leader); |
6c73ade6 | 88 | ifp->if_net = ui->ui_flags; |
aee8ddf8 | 89 | /* the host and imp fields will be filled in by the imp */ |
1e25d807 | 90 | ifp->if_addr = if_makeaddr(ifp->if_net, 0); |
a2cd4df7 BJ |
91 | ifp->if_init = impinit; |
92 | ifp->if_output = impoutput; | |
93 | /* reset is handled at the hardware level */ | |
6c73ade6 BJ |
94 | if_attach(ifp); |
95 | /* kludge to hand pointers back to hardware attach routine */ | |
96 | return ((int)&sc->imp_if); | |
97 | } | |
98 | ||
1e977657 BJ |
99 | #ifdef notdef |
100 | /* | |
101 | * Timer routine to keep priming the IMP until it sends | |
102 | * us the noops we need. Since we depend on the host and | |
103 | * imp values returned in the noop messages, we must wait | |
104 | * for them before we allow any outgoing traffic. | |
105 | */ | |
106 | imptimer(sc) | |
107 | register struct imp_softc *sc; | |
108 | { | |
109 | int s = splimp(); | |
110 | ||
111 | if (sc->imp_state != IMPS_INIT) { | |
112 | splx(s); | |
113 | return; | |
114 | } | |
115 | sc->imp_dropcnt = IMP_DROPCNT; | |
116 | impnoops(sc); | |
117 | timeout(imptimer, (caddr_t)sc, 30 * hz); | |
118 | splx(s); | |
119 | } | |
120 | #endif | |
121 | ||
6c73ade6 BJ |
122 | /* |
123 | * IMP initialization routine: call hardware module to | |
124 | * setup UNIBUS resources, init state and get ready for | |
125 | * NOOPs the IMP should send us, and that we want to drop. | |
126 | */ | |
127 | impinit(unit) | |
128 | int unit; | |
129 | { | |
130 | register struct imp_softc *sc = &imp_softc[unit]; | |
131 | ||
a2cd4df7 BJ |
132 | if ((*sc->imp_cb.ic_init)(unit) == 0) { |
133 | sc->imp_state = IMPS_DOWN; | |
134 | return; | |
135 | } | |
6c73ade6 | 136 | sc->imp_state = IMPS_INIT; |
1e977657 BJ |
137 | #ifdef notdef |
138 | imptimer(sc); | |
139 | #else | |
6c73ade6 | 140 | sc->imp_dropcnt = IMP_DROPCNT; |
a2cd4df7 | 141 | impnoops(sc); |
1e977657 | 142 | #endif |
6c73ade6 BJ |
143 | } |
144 | ||
145 | struct sockproto impproto = { PF_IMPLINK }; | |
faad37c0 SL |
146 | struct sockaddr_in impdst = { AF_IMPLINK }; |
147 | struct sockaddr_in impsrc = { AF_IMPLINK }; | |
6c73ade6 BJ |
148 | |
149 | /* | |
150 | * ARPAnet 1822 input routine. | |
151 | * Called from hardware input interrupt routine to handle 1822 | |
152 | * IMP-host messages. Type 0 messages (non-control) are | |
153 | * passed to higher level protocol processors on the basis | |
154 | * of link number. Other type messages (control) are handled here. | |
155 | */ | |
a2cd4df7 | 156 | impinput(unit, m) |
6c73ade6 | 157 | int unit; |
a2cd4df7 | 158 | register struct mbuf *m; |
6c73ade6 | 159 | { |
6c73ade6 BJ |
160 | register struct imp_leader *ip; |
161 | register struct imp_softc *sc = &imp_softc[unit]; | |
162 | register struct host *hp; | |
163 | register struct ifqueue *inq; | |
a2cd4df7 | 164 | struct control_leader *cp; |
6c73ade6 | 165 | struct in_addr addr; |
e33b5b1a | 166 | struct mbuf *next; |
6c73ade6 | 167 | |
5cda82aa | 168 | COUNT(IMPINPUT); |
34c22ab5 | 169 | /* verify leader length. */ |
a2cd4df7 BJ |
170 | if (m->m_len < sizeof(struct control_leader) && |
171 | (m = m_pullup(m, sizeof(struct control_leader))) == 0) | |
172 | return; | |
173 | cp = mtod(m, struct control_leader *); | |
174 | if (cp->dl_mtype == IMPTYPE_DATA) | |
175 | if (m->m_len < sizeof(struct imp_leader) && | |
176 | (m = m_pullup(m, sizeof(struct imp_leader))) == 0) | |
177 | return; | |
6c73ade6 BJ |
178 | ip = mtod(m, struct imp_leader *); |
179 | ||
34c22ab5 | 180 | /* check leader type */ |
a2cd4df7 BJ |
181 | if (ip->il_format != IMP_NFF) { |
182 | sc->imp_if.if_collisions++; /* XXX */ | |
6c73ade6 | 183 | goto drop; |
a2cd4df7 | 184 | } |
6c73ade6 BJ |
185 | |
186 | /* | |
187 | * Certain messages require a host structure. | |
188 | * Do this in one shot here. | |
189 | */ | |
190 | switch (ip->il_mtype) { | |
191 | ||
192 | case IMPTYPE_RFNM: | |
193 | case IMPTYPE_INCOMPLETE: | |
194 | case IMPTYPE_HOSTDEAD: | |
195 | case IMPTYPE_HOSTUNREACH: | |
196 | case IMPTYPE_BADDATA: | |
41e530c7 | 197 | #ifdef notdef |
a2cd4df7 | 198 | addr.s_net = ip->il_network; |
41e530c7 BJ |
199 | #else |
200 | addr.s_net = 0; | |
201 | #endif | |
a2cd4df7 BJ |
202 | addr.s_imp = ip->il_imp; |
203 | addr.s_host = ip->il_host; | |
204 | hp = hostlookup(addr); | |
6c73ade6 BJ |
205 | break; |
206 | } | |
207 | ||
208 | switch (ip->il_mtype) { | |
209 | ||
6c73ade6 | 210 | case IMPTYPE_DATA: |
6c73ade6 BJ |
211 | break; |
212 | ||
213 | /* | |
214 | * IMP leader error. Reset the IMP and discard the packet. | |
215 | */ | |
216 | case IMPTYPE_BADLEADER: | |
a0b7c7fb SL |
217 | /* |
218 | * According to 1822 document, this message | |
219 | * will be generated in response to the | |
220 | * first noop sent to the IMP after | |
221 | * the host resets the IMP interface. | |
222 | */ | |
a2cd4df7 | 223 | if (sc->imp_state != IMPS_INIT) { |
e33b5b1a | 224 | impmsg(sc, "leader error"); |
a2cd4df7 | 225 | hostreset(sc->imp_if.if_net); /* XXX */ |
a0b7c7fb SL |
226 | impnoops(sc); |
227 | } | |
1e25d807 | 228 | goto rawlinkin; |
6c73ade6 BJ |
229 | |
230 | /* | |
231 | * IMP going down. Print message, and if not immediate, | |
232 | * set off a timer to insure things will be reset at the | |
233 | * appropriate time. | |
234 | */ | |
235 | case IMPTYPE_DOWN: | |
236 | if ((ip->il_link & IMP_DMASK) == 0) { | |
237 | sc->imp_state = IMPS_GOINGDOWN; | |
668cc26d | 238 | timeout(impdown, (caddr_t)sc, 30 * hz); |
6c73ade6 | 239 | } |
668cc26d SL |
240 | impmsg(sc, "going down %s", |
241 | (u_int)impmessage[ip->il_link&IMP_DMASK]); | |
1e25d807 | 242 | goto rawlinkin; |
6c73ade6 BJ |
243 | |
244 | /* | |
245 | * A NOP usually seen during the initialization sequence. | |
246 | * Compare the local address with that in the message. | |
247 | * Reset the local address notion if it doesn't match. | |
248 | */ | |
a2cd4df7 BJ |
249 | case IMPTYPE_NOOP: { |
250 | register struct in_addr *sin; | |
251 | ||
a0b7c7fb SL |
252 | if (sc->imp_state == IMPS_DOWN) { |
253 | sc->imp_state = IMPS_INIT; | |
254 | sc->imp_dropcnt = IMP_DROPCNT; | |
255 | } | |
fcd78660 | 256 | if (sc->imp_state != IMPS_INIT || --sc->imp_dropcnt > 0) |
e431883e | 257 | goto drop; |
a2cd4df7 BJ |
258 | sc->imp_state = IMPS_UP; |
259 | sin = &sc->imp_if.if_addr; | |
260 | sc->imp_if.if_host[0] = sin->s_host = ip->il_host; | |
261 | sin->s_imp = ip->il_imp; | |
668cc26d | 262 | impmsg(sc, "reset (host %d/imp %d)", (u_int)ip->il_host, |
a2cd4df7 BJ |
263 | ntohs(ip->il_imp)); |
264 | /* restart output in case something was q'd */ | |
265 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); | |
e431883e | 266 | goto drop; |
aee8ddf8 | 267 | } |
6c73ade6 BJ |
268 | |
269 | /* | |
270 | * RFNM or INCOMPLETE message, record in | |
271 | * host table and prime output routine. | |
272 | * | |
a0b7c7fb | 273 | * SHOULD NOTIFY PROTOCOL ABOUT INCOMPLETES. |
6c73ade6 BJ |
274 | */ |
275 | case IMPTYPE_RFNM: | |
276 | case IMPTYPE_INCOMPLETE: | |
e33b5b1a BJ |
277 | if (hp && hp->h_rfnm) |
278 | if (next = hostdeque(hp)) | |
668cc26d | 279 | (void) impsnd(&sc->imp_if, next); |
e431883e | 280 | goto drop; |
6c73ade6 BJ |
281 | |
282 | /* | |
283 | * Host or IMP can't be reached. Flush any packets | |
284 | * awaiting transmission and release the host structure. | |
285 | * | |
a2cd4df7 | 286 | * TODO: NOTIFY THE PROTOCOL |
6c73ade6 BJ |
287 | */ |
288 | case IMPTYPE_HOSTDEAD: | |
e33b5b1a | 289 | impmsg(sc, "host dead"); /* XXX */ |
a2cd4df7 BJ |
290 | goto common; /* XXX */ |
291 | ||
292 | /* SHOULD SIGNAL ROUTING DAEMON */ | |
6c73ade6 | 293 | case IMPTYPE_HOSTUNREACH: |
e33b5b1a | 294 | impmsg(sc, "host unreachable"); /* XXX */ |
a2cd4df7 | 295 | common: |
6c73ade6 | 296 | if (hp) |
a2cd4df7 | 297 | hostfree(hp); /* won't work right */ |
41e530c7 | 298 | goto rawlinkin; |
6c73ade6 BJ |
299 | |
300 | /* | |
301 | * Error in data. Clear RFNM status for this host and send | |
302 | * noops to the IMP to clear the interface. | |
303 | */ | |
304 | case IMPTYPE_BADDATA: | |
e33b5b1a | 305 | impmsg(sc, "data error"); |
6c73ade6 BJ |
306 | if (hp) |
307 | hp->h_rfnm = 0; | |
308 | impnoops(sc); | |
41e530c7 | 309 | goto rawlinkin; |
6c73ade6 BJ |
310 | |
311 | /* | |
a0b7c7fb | 312 | * Interface reset. |
6c73ade6 BJ |
313 | */ |
314 | case IMPTYPE_RESET: | |
e33b5b1a | 315 | impmsg(sc, "interface reset"); |
a0b7c7fb | 316 | impnoops(sc); |
1e25d807 | 317 | goto rawlinkin; |
6c73ade6 BJ |
318 | |
319 | default: | |
320 | sc->imp_if.if_collisions++; /* XXX */ | |
1e25d807 | 321 | goto rawlinkin; |
6c73ade6 BJ |
322 | } |
323 | ||
324 | /* | |
34c22ab5 BJ |
325 | * Data for a protocol. Dispatch to the appropriate |
326 | * protocol routine (running at software interrupt). | |
327 | * If this isn't a raw interface, advance pointer | |
328 | * into mbuf past leader. | |
6c73ade6 BJ |
329 | */ |
330 | switch (ip->il_link) { | |
331 | ||
332 | #ifdef INET | |
333 | case IMPLINK_IP: | |
334 | m->m_len -= sizeof(struct imp_leader); | |
335 | m->m_off += sizeof(struct imp_leader); | |
9c8692e9 | 336 | schednetisr(NETISR_IP); |
6c73ade6 BJ |
337 | inq = &ipintrq; |
338 | break; | |
339 | #endif | |
340 | ||
341 | default: | |
654fef96 | 342 | rawlinkin: |
6c73ade6 | 343 | impproto.sp_protocol = ip->il_link; |
faad37c0 SL |
344 | impdst.sin_addr = sc->imp_if.if_addr; |
345 | impsrc.sin_addr.s_net = ip->il_network; | |
346 | impsrc.sin_addr.s_host = ip->il_host; | |
347 | impsrc.sin_addr.s_imp = ip->il_imp; | |
668cc26d SL |
348 | raw_input(m, &impproto, (struct sockaddr *)&impdst, |
349 | (struct sockaddr *)&impsrc); | |
6c73ade6 BJ |
350 | return; |
351 | } | |
1e977657 BJ |
352 | if (IF_QFULL(inq)) { |
353 | IF_DROP(inq); | |
354 | goto drop; | |
355 | } | |
6c73ade6 BJ |
356 | IF_ENQUEUE(inq, m); |
357 | return; | |
358 | ||
359 | drop: | |
360 | m_freem(m); | |
361 | } | |
362 | ||
a0b7c7fb SL |
363 | /* |
364 | * Bring the IMP down after notification. | |
365 | */ | |
366 | impdown(sc) | |
367 | struct imp_softc *sc; | |
368 | { | |
1e977657 | 369 | |
a0b7c7fb | 370 | sc->imp_state = IMPS_DOWN; |
e33b5b1a | 371 | impmsg(sc, "marked down"); |
a0b7c7fb SL |
372 | /* notify protocols with messages waiting? */ |
373 | } | |
374 | ||
6c73ade6 | 375 | /*VARARGS*/ |
e33b5b1a | 376 | impmsg(sc, fmt, a1, a2) |
6c73ade6 BJ |
377 | struct imp_softc *sc; |
378 | char *fmt; | |
668cc26d | 379 | u_int a1; |
6c73ade6 | 380 | { |
1e977657 | 381 | |
6c73ade6 BJ |
382 | printf("imp%d: ", sc->imp_if.if_unit); |
383 | printf(fmt, a1, a2); | |
384 | printf("\n"); | |
385 | } | |
386 | ||
387 | /* | |
388 | * ARPAnet 1822 output routine. | |
389 | * Called from higher level protocol routines to set up messages for | |
390 | * transmission to the imp. Sets up the header and calls impsnd to | |
391 | * enqueue the message for this IMP's hardware driver. | |
392 | */ | |
393 | impoutput(ifp, m0, pf) | |
394 | register struct ifnet *ifp; | |
395 | struct mbuf *m0; | |
396 | { | |
397 | register struct imp_leader *imp; | |
398 | register struct mbuf *m = m0; | |
1e63a6ab | 399 | int x, dhost, dimp, dlink, len, dnet; |
6c73ade6 | 400 | |
a2cd4df7 | 401 | COUNT(IMPOUTPUT); |
6c73ade6 BJ |
402 | /* |
403 | * Don't even try if the IMP is unavailable. | |
404 | */ | |
a0b7c7fb SL |
405 | x = imp_softc[ifp->if_unit].imp_state; |
406 | if (x == IMPS_DOWN || x == IMPS_GOINGDOWN) | |
407 | goto drop; | |
6c73ade6 BJ |
408 | |
409 | switch (pf) { | |
410 | ||
411 | #ifdef INET | |
412 | case PF_INET: { | |
413 | register struct ip *ip = mtod(m0, struct ip *); | |
414 | ||
415 | dhost = ip->ip_dst.s_host; | |
1e63a6ab | 416 | dimp = ip->ip_dst.s_impno; |
6c73ade6 | 417 | dlink = IMPLINK_IP; |
1e63a6ab | 418 | dnet = 0; |
668cc26d | 419 | len = ntohs((u_short)ip->ip_len); |
6c73ade6 BJ |
420 | break; |
421 | } | |
422 | #endif | |
423 | case PF_IMPLINK: | |
424 | goto leaderexists; | |
425 | ||
426 | default: | |
427 | printf("imp%d: can't encapsulate pf%d\n", ifp->if_unit, pf); | |
a0b7c7fb | 428 | goto drop; |
6c73ade6 BJ |
429 | } |
430 | ||
431 | /* | |
432 | * Add IMP leader. If there's not enough space in the | |
433 | * first mbuf, allocate another. If that should fail, we | |
434 | * drop this sucker. | |
435 | */ | |
436 | if (m->m_off > MMAXOFF || | |
437 | MMINOFF + sizeof(struct imp_leader) > m->m_off) { | |
438 | m = m_get(M_DONTWAIT); | |
a0b7c7fb SL |
439 | if (m == 0) |
440 | goto drop; | |
6c73ade6 BJ |
441 | m->m_next = m0; |
442 | m->m_off = MMINOFF; | |
443 | m->m_len = sizeof(struct imp_leader); | |
444 | } else { | |
445 | m->m_off -= sizeof(struct imp_leader); | |
446 | m->m_len += sizeof(struct imp_leader); | |
447 | } | |
448 | imp = mtod(m, struct imp_leader *); | |
449 | imp->il_format = IMP_NFF; | |
41e530c7 | 450 | imp->il_mtype = IMPTYPE_DATA; |
1e63a6ab | 451 | imp->il_network = dnet; |
6c73ade6 | 452 | imp->il_host = dhost; |
1e63a6ab | 453 | imp->il_imp = htons((u_short)dimp); |
668cc26d SL |
454 | imp->il_length = |
455 | htons((u_short)(len + sizeof(struct imp_leader)) << 3); | |
6c73ade6 | 456 | imp->il_link = dlink; |
41e530c7 | 457 | imp->il_flags = imp->il_htype = imp->il_subtype = 0; |
6c73ade6 BJ |
458 | |
459 | leaderexists: | |
460 | /* | |
461 | * Hand message to impsnd to perform RFNM counting | |
462 | * and eventual transmission. | |
463 | */ | |
464 | return (impsnd(ifp, m)); | |
a0b7c7fb SL |
465 | drop: |
466 | m_freem(m0); | |
467 | return (0); | |
6c73ade6 BJ |
468 | } |
469 | ||
470 | /* | |
471 | * Put a message on an interface's output queue. | |
472 | * Perform RFNM counting: no more than 8 message may be | |
473 | * in flight to any one host. | |
474 | */ | |
475 | impsnd(ifp, m) | |
476 | struct ifnet *ifp; | |
477 | struct mbuf *m; | |
478 | { | |
479 | register struct imp_leader *ip; | |
480 | register struct host *hp; | |
481 | struct impcb *icp; | |
482 | int x; | |
483 | ||
a2cd4df7 | 484 | COUNT(IMPSND); |
6c73ade6 BJ |
485 | ip = mtod(m, struct imp_leader *); |
486 | ||
487 | /* | |
488 | * Do RFNM counting for data messages | |
489 | * (no more than 8 outstanding to any host) | |
490 | */ | |
fcd78660 | 491 | x = splimp(); |
6c73ade6 BJ |
492 | if (ip->il_mtype == IMPTYPE_DATA) { |
493 | struct in_addr addr; | |
494 | ||
41e530c7 | 495 | #ifdef notdef |
a2cd4df7 | 496 | addr.s_net = ip->il_network; |
41e530c7 BJ |
497 | #else |
498 | addr.s_net = 0; | |
499 | #endif | |
6c73ade6 BJ |
500 | addr.s_host = ip->il_host; |
501 | addr.s_imp = ip->il_imp; | |
a2cd4df7 BJ |
502 | if ((hp = hostlookup(addr)) == 0) |
503 | hp = hostenter(addr); | |
6c73ade6 BJ |
504 | |
505 | /* | |
a0b7c7fb | 506 | * If IMP would block, queue until RFNM |
6c73ade6 BJ |
507 | */ |
508 | if (hp) { | |
6c73ade6 BJ |
509 | if (hp->h_rfnm < 8) { |
510 | hp->h_rfnm++; | |
511 | goto enque; | |
512 | } | |
fcd78660 BJ |
513 | if (hp->h_qcnt < 8) { /* high water mark */ |
514 | HOST_ENQUE(hp, m); | |
515 | goto start; | |
516 | } | |
6c73ade6 | 517 | } |
6c73ade6 | 518 | m_freem(m); |
41e530c7 | 519 | splx(x); |
6c73ade6 BJ |
520 | return (0); |
521 | } | |
522 | enque: | |
1e977657 BJ |
523 | if (IF_QFULL(&ifp->if_snd)) { |
524 | IF_DROP(&ifp->if_snd); | |
525 | m_freem(m); | |
526 | splx(x); | |
527 | return (0); | |
528 | } | |
6c73ade6 | 529 | IF_ENQUEUE(&ifp->if_snd, m); |
6c73ade6 | 530 | start: |
fcd78660 | 531 | splx(x); |
6c73ade6 BJ |
532 | icp = &imp_softc[ifp->if_unit].imp_cb; |
533 | if (icp->ic_oactive == 0) | |
534 | (*icp->ic_start)(ifp->if_unit); | |
535 | return (1); | |
536 | } | |
537 | ||
538 | /* | |
539 | * Put three 1822 NOOPs at the head of the output queue. | |
540 | * Part of host-IMP initialization procedure. | |
541 | * (Should return success/failure, but noone knows | |
542 | * what to do with this, so why bother?) | |
543 | */ | |
544 | impnoops(sc) | |
545 | register struct imp_softc *sc; | |
546 | { | |
547 | register i; | |
548 | register struct mbuf *m; | |
a2cd4df7 | 549 | register struct control_leader *cp; |
6c73ade6 BJ |
550 | int x; |
551 | ||
a2cd4df7 | 552 | COUNT(IMPNOOPS); |
6c73ade6 BJ |
553 | sc->imp_state = IMPS_INIT; |
554 | sc->imp_dropcnt = IMP_DROPCNT; | |
a2cd4df7 | 555 | for (i = 0; i < IMP_DROPCNT + 1; i++ ) { |
6c73ade6 BJ |
556 | if ((m = m_getclr(M_DONTWAIT)) == 0) |
557 | return; | |
558 | m->m_off = MMINOFF; | |
a2cd4df7 BJ |
559 | m->m_len = sizeof(struct control_leader); |
560 | cp = mtod(m, struct control_leader *); | |
561 | cp->dl_format = IMP_NFF; | |
562 | cp->dl_link = i; | |
563 | cp->dl_mtype = IMPTYPE_NOOP; | |
6c73ade6 BJ |
564 | x = splimp(); |
565 | IF_PREPEND(&sc->imp_if.if_snd, m); | |
566 | splx(x); | |
567 | } | |
568 | if (sc->imp_cb.ic_oactive == 0) | |
569 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); | |
570 | } | |
a2cd4df7 | 571 | |
41e530c7 | 572 | #ifdef IMPLEADERS |
a2cd4df7 BJ |
573 | printleader(routine, ip) |
574 | char *routine; | |
575 | register struct imp_leader *ip; | |
576 | { | |
577 | printf("%s: ", routine); | |
578 | printbyte((char *)ip, 12); | |
579 | printf("<fmt=%x,net=%x,flags=%x,mtype=", ip->il_format, ip->il_network, | |
580 | ip->il_flags); | |
581 | if (ip->il_mtype <= IMPTYPE_READY) | |
582 | printf("%s,", impleaders[ip->il_mtype]); | |
583 | else | |
584 | printf("%x,", ip->il_mtype); | |
585 | printf("htype=%x,host=%x,imp=%x,link=", ip->il_htype, ip->il_host, | |
1e63a6ab | 586 | ntohs(ip->il_imp)); |
a2cd4df7 BJ |
587 | if (ip->il_link == IMPLINK_IP) |
588 | printf("ip,"); | |
589 | else | |
590 | printf("%x,", ip->il_link); | |
591 | printf("subtype=%x,len=%x>\n",ip->il_subtype,ntohs(ip->il_length)>>3); | |
592 | } | |
593 | ||
594 | printbyte(cp, n) | |
595 | register char *cp; | |
596 | int n; | |
597 | { | |
598 | register i, j, c; | |
599 | ||
600 | for (i=0; i<n; i++) { | |
601 | c = *cp++; | |
602 | for (j=0; j<2; j++) | |
603 | putchar("0123456789abcdef"[(c>>((1-j)*4))&0xf]); | |
604 | putchar(' '); | |
605 | } | |
606 | putchar('\n'); | |
607 | } | |
6c73ade6 | 608 | #endif |
41e530c7 | 609 | #endif |