Commit | Line | Data |
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77a4e3ca | 1 | /* if_imp.c 4.38 82/10/05 */ |
6c73ade6 BJ |
2 | |
3 | #include "imp.h" | |
4 | #if NIMP > 0 | |
5 | /* | |
72e4f44e | 6 | * ARPANET IMP interface driver. |
6c73ade6 BJ |
7 | * |
8 | * The IMP-host protocol is handled here, leaving | |
9 | * hardware specifics to the lower level interface driver. | |
10 | */ | |
11 | #include "../h/param.h" | |
12 | #include "../h/systm.h" | |
13 | #include "../h/mbuf.h" | |
14 | #include "../h/pte.h" | |
15 | #include "../h/buf.h" | |
16 | #include "../h/protosw.h" | |
17 | #include "../h/socket.h" | |
18 | #include "../h/ubareg.h" | |
19 | #include "../h/ubavar.h" | |
20 | #include "../h/cpu.h" | |
21 | #include "../h/mtpr.h" | |
22 | #include "../h/vmmac.h" | |
23 | #include "../net/in.h" | |
24 | #include "../net/in_systm.h" | |
25 | #include "../net/if.h" | |
b690198c | 26 | /* define IMPLEADERS here to get leader printing code */ |
6c73ade6 | 27 | #include "../net/if_imp.h" |
41e530c7 | 28 | #include "../net/if_imphost.h" |
6c73ade6 BJ |
29 | #include "../net/ip.h" |
30 | #include "../net/ip_var.h" | |
f6311fb6 | 31 | #include "../net/route.h" |
8a2f82db | 32 | #include <errno.h> |
6c73ade6 BJ |
33 | |
34 | /* | |
35 | * IMP software status per interface. | |
36 | * (partially shared with the hardware specific module) | |
37 | * | |
38 | * Each interface is referenced by a network interface structure, | |
39 | * imp_if, which the routing code uses to locate the interface. | |
40 | * This structure contains the output queue for the interface, its | |
41 | * address, ... IMP specific structures used in connecting the | |
42 | * IMP software modules to the hardware specific interface routines | |
a2cd4df7 BJ |
43 | * are stored here. The common structures are made visible to the |
44 | * interface driver by passing a pointer to the hardware routine | |
45 | * at "attach" time. | |
6c73ade6 BJ |
46 | * |
47 | * NOTE: imp_if and imp_cb are assumed adjacent in hardware code. | |
48 | */ | |
49 | struct imp_softc { | |
50 | struct ifnet imp_if; /* network visible interface */ | |
51 | struct impcb imp_cb; /* hooks to hardware module */ | |
52 | u_char imp_state; /* current state of IMP */ | |
53 | char imp_dropcnt; /* used during initialization */ | |
6c73ade6 BJ |
54 | } imp_softc[NIMP]; |
55 | ||
56 | /* | |
57 | * Messages from IMP regarding why | |
58 | * it's going down. | |
59 | */ | |
e33b5b1a | 60 | static char *impmessage[] = { |
6c73ade6 BJ |
61 | "in 30 seconds", |
62 | "for hardware PM", | |
63 | "to reload software", | |
64 | "for emergency reset" | |
65 | }; | |
66 | ||
a2cd4df7 BJ |
67 | int impdown(), impinit(), impoutput(); |
68 | ||
6c73ade6 BJ |
69 | /* |
70 | * IMP attach routine. Called from hardware device attach routine | |
71 | * at configuration time with a pointer to the UNIBUS device structure. | |
72 | * Sets up local state and returns pointer to base of ifnet+impcb | |
73 | * structures. This is then used by the device's attach routine | |
74 | * set up its back pointers. | |
75 | */ | |
76 | impattach(ui) | |
77 | struct uba_device *ui; | |
78 | { | |
79 | struct imp_softc *sc = &imp_softc[ui->ui_unit]; | |
80 | register struct ifnet *ifp = &sc->imp_if; | |
ee787340 | 81 | struct sockaddr_in *sin; |
6c73ade6 | 82 | |
6c73ade6 BJ |
83 | /* UNIT COULD BE AMBIGUOUS */ |
84 | ifp->if_unit = ui->ui_unit; | |
85 | ifp->if_name = "imp"; | |
e431883e | 86 | ifp->if_mtu = IMPMTU - sizeof(struct imp_leader); |
6c73ade6 | 87 | ifp->if_net = ui->ui_flags; |
aee8ddf8 | 88 | /* the host and imp fields will be filled in by the imp */ |
ee787340 SL |
89 | sin = (struct sockaddr_in *)&ifp->if_addr; |
90 | sin->sin_family = AF_INET; | |
91 | sin->sin_addr = if_makeaddr(ifp->if_net, 0); | |
a2cd4df7 BJ |
92 | ifp->if_init = impinit; |
93 | ifp->if_output = impoutput; | |
94 | /* reset is handled at the hardware level */ | |
6c73ade6 | 95 | if_attach(ifp); |
6c73ade6 BJ |
96 | return ((int)&sc->imp_if); |
97 | } | |
98 | ||
99 | /* | |
100 | * IMP initialization routine: call hardware module to | |
101 | * setup UNIBUS resources, init state and get ready for | |
102 | * NOOPs the IMP should send us, and that we want to drop. | |
103 | */ | |
104 | impinit(unit) | |
105 | int unit; | |
106 | { | |
98b6195e | 107 | int s = splimp(); |
6c73ade6 BJ |
108 | register struct imp_softc *sc = &imp_softc[unit]; |
109 | ||
a2cd4df7 BJ |
110 | if ((*sc->imp_cb.ic_init)(unit) == 0) { |
111 | sc->imp_state = IMPS_DOWN; | |
ee787340 | 112 | sc->imp_if.if_flags &= ~IFF_UP; |
98b6195e | 113 | splx(s); |
a2cd4df7 BJ |
114 | return; |
115 | } | |
6c73ade6 | 116 | sc->imp_state = IMPS_INIT; |
a2cd4df7 | 117 | impnoops(sc); |
98b6195e | 118 | splx(s); |
6c73ade6 BJ |
119 | } |
120 | ||
121 | struct sockproto impproto = { PF_IMPLINK }; | |
faad37c0 SL |
122 | struct sockaddr_in impdst = { AF_IMPLINK }; |
123 | struct sockaddr_in impsrc = { AF_IMPLINK }; | |
b690198c | 124 | #ifdef IMPLEADERS |
7dfb87a5 | 125 | int impprintfs = 0; |
b690198c | 126 | #endif |
6c73ade6 BJ |
127 | |
128 | /* | |
129 | * ARPAnet 1822 input routine. | |
130 | * Called from hardware input interrupt routine to handle 1822 | |
131 | * IMP-host messages. Type 0 messages (non-control) are | |
132 | * passed to higher level protocol processors on the basis | |
133 | * of link number. Other type messages (control) are handled here. | |
134 | */ | |
a2cd4df7 | 135 | impinput(unit, m) |
6c73ade6 | 136 | int unit; |
a2cd4df7 | 137 | register struct mbuf *m; |
6c73ade6 | 138 | { |
6c73ade6 BJ |
139 | register struct imp_leader *ip; |
140 | register struct imp_softc *sc = &imp_softc[unit]; | |
141 | register struct host *hp; | |
142 | register struct ifqueue *inq; | |
a2cd4df7 | 143 | struct control_leader *cp; |
6c73ade6 | 144 | struct in_addr addr; |
e33b5b1a | 145 | struct mbuf *next; |
ee787340 | 146 | struct sockaddr_in *sin; |
6c73ade6 | 147 | |
34c22ab5 | 148 | /* verify leader length. */ |
a2cd4df7 BJ |
149 | if (m->m_len < sizeof(struct control_leader) && |
150 | (m = m_pullup(m, sizeof(struct control_leader))) == 0) | |
151 | return; | |
152 | cp = mtod(m, struct control_leader *); | |
153 | if (cp->dl_mtype == IMPTYPE_DATA) | |
154 | if (m->m_len < sizeof(struct imp_leader) && | |
155 | (m = m_pullup(m, sizeof(struct imp_leader))) == 0) | |
156 | return; | |
6c73ade6 | 157 | ip = mtod(m, struct imp_leader *); |
b690198c | 158 | #ifdef IMPLEADERS |
7dfb87a5 SL |
159 | if (impprintfs) |
160 | printleader("impinput", ip); | |
b690198c | 161 | #endif |
6c73ade6 | 162 | |
34c22ab5 | 163 | /* check leader type */ |
a2cd4df7 BJ |
164 | if (ip->il_format != IMP_NFF) { |
165 | sc->imp_if.if_collisions++; /* XXX */ | |
6c73ade6 | 166 | goto drop; |
a2cd4df7 | 167 | } |
6c73ade6 | 168 | |
ba45553a | 169 | if (ip->il_mtype != IMPTYPE_DATA) { |
41e530c7 | 170 | #ifdef notdef |
a2cd4df7 | 171 | addr.s_net = ip->il_network; |
41e530c7 | 172 | #else |
ba45553a | 173 | addr.s_net = sc->imp_if.if_net; |
41e530c7 | 174 | #endif |
a2cd4df7 BJ |
175 | addr.s_imp = ip->il_imp; |
176 | addr.s_host = ip->il_host; | |
6c73ade6 | 177 | } |
6c73ade6 BJ |
178 | switch (ip->il_mtype) { |
179 | ||
6c73ade6 | 180 | case IMPTYPE_DATA: |
6c73ade6 BJ |
181 | break; |
182 | ||
183 | /* | |
184 | * IMP leader error. Reset the IMP and discard the packet. | |
185 | */ | |
186 | case IMPTYPE_BADLEADER: | |
a0b7c7fb SL |
187 | /* |
188 | * According to 1822 document, this message | |
189 | * will be generated in response to the | |
190 | * first noop sent to the IMP after | |
191 | * the host resets the IMP interface. | |
192 | */ | |
a2cd4df7 | 193 | if (sc->imp_state != IMPS_INIT) { |
e33b5b1a | 194 | impmsg(sc, "leader error"); |
72e4f44e | 195 | hostreset(sc->imp_if.if_net); |
a0b7c7fb SL |
196 | impnoops(sc); |
197 | } | |
72e4f44e | 198 | goto drop; |
6c73ade6 BJ |
199 | |
200 | /* | |
201 | * IMP going down. Print message, and if not immediate, | |
202 | * set off a timer to insure things will be reset at the | |
203 | * appropriate time. | |
204 | */ | |
205 | case IMPTYPE_DOWN: | |
f32a85bb | 206 | if (sc->imp_state < IMPS_INIT) |
47e51140 | 207 | goto drop; |
6c73ade6 BJ |
208 | if ((ip->il_link & IMP_DMASK) == 0) { |
209 | sc->imp_state = IMPS_GOINGDOWN; | |
668cc26d | 210 | timeout(impdown, (caddr_t)sc, 30 * hz); |
6c73ade6 | 211 | } |
668cc26d SL |
212 | impmsg(sc, "going down %s", |
213 | (u_int)impmessage[ip->il_link&IMP_DMASK]); | |
72e4f44e | 214 | goto drop; |
6c73ade6 BJ |
215 | |
216 | /* | |
217 | * A NOP usually seen during the initialization sequence. | |
218 | * Compare the local address with that in the message. | |
219 | * Reset the local address notion if it doesn't match. | |
220 | */ | |
ee787340 | 221 | case IMPTYPE_NOOP: |
a0b7c7fb SL |
222 | if (sc->imp_state == IMPS_DOWN) { |
223 | sc->imp_state = IMPS_INIT; | |
224 | sc->imp_dropcnt = IMP_DROPCNT; | |
225 | } | |
98b6195e | 226 | if (sc->imp_state == IMPS_INIT && --sc->imp_dropcnt > 0) |
e431883e | 227 | goto drop; |
98b6195e SL |
228 | sin = (struct sockaddr_in *)&sc->imp_if.if_addr; |
229 | if (sin->sin_addr.s_host != ip->il_host || | |
230 | sin->sin_addr.s_imp != ip->il_imp) { | |
231 | sc->imp_if.if_host[0] = | |
232 | sin->sin_addr.s_host = ip->il_host; | |
233 | sin->sin_addr.s_imp = ip->il_imp; | |
234 | impmsg(sc, "reset (host %d/imp %d)", (u_int)ip->il_host, | |
235 | ntohs(ip->il_imp)); | |
236 | } | |
a2cd4df7 | 237 | sc->imp_state = IMPS_UP; |
ee787340 | 238 | sc->imp_if.if_flags |= IFF_UP; |
88f80700 | 239 | if_rtinit(&sc->imp_if, RTF_UP); |
e431883e | 240 | goto drop; |
6c73ade6 BJ |
241 | |
242 | /* | |
72e4f44e SL |
243 | * RFNM or INCOMPLETE message, send next |
244 | * message on the q. We could pass incomplete's | |
245 | * up to the next level, but this currently isn't | |
246 | * needed. | |
6c73ade6 BJ |
247 | */ |
248 | case IMPTYPE_RFNM: | |
249 | case IMPTYPE_INCOMPLETE: | |
ba45553a SL |
250 | if (hp = hostlookup(addr)) { |
251 | if (hp->h_rfnm == 0) | |
252 | hp->h_flags &= ~HF_INUSE; | |
253 | else if (next = hostdeque(hp)) | |
254 | (void) impsnd(&sc->imp_if, next); | |
255 | } | |
e431883e | 256 | goto drop; |
6c73ade6 BJ |
257 | |
258 | /* | |
259 | * Host or IMP can't be reached. Flush any packets | |
260 | * awaiting transmission and release the host structure. | |
6c73ade6 BJ |
261 | */ |
262 | case IMPTYPE_HOSTDEAD: | |
ba45553a SL |
263 | case IMPTYPE_HOSTUNREACH: { |
264 | int s = splnet(); | |
265 | impnotify(ip->il_mtype, ip, hostlookup(addr)); | |
266 | splx(s); | |
41e530c7 | 267 | goto rawlinkin; |
ba45553a | 268 | } |
6c73ade6 BJ |
269 | |
270 | /* | |
271 | * Error in data. Clear RFNM status for this host and send | |
272 | * noops to the IMP to clear the interface. | |
273 | */ | |
ba45553a SL |
274 | case IMPTYPE_BADDATA: { |
275 | int s; | |
276 | ||
e33b5b1a | 277 | impmsg(sc, "data error"); |
ba45553a SL |
278 | s = splnet(); |
279 | if (hp = hostlookup(addr)) | |
6c73ade6 | 280 | hp->h_rfnm = 0; |
ba45553a | 281 | splx(s); |
6c73ade6 | 282 | impnoops(sc); |
72e4f44e | 283 | goto drop; |
ba45553a | 284 | } |
6c73ade6 BJ |
285 | |
286 | /* | |
a0b7c7fb | 287 | * Interface reset. |
6c73ade6 BJ |
288 | */ |
289 | case IMPTYPE_RESET: | |
e33b5b1a | 290 | impmsg(sc, "interface reset"); |
a0b7c7fb | 291 | impnoops(sc); |
72e4f44e | 292 | goto drop; |
6c73ade6 BJ |
293 | |
294 | default: | |
295 | sc->imp_if.if_collisions++; /* XXX */ | |
72e4f44e | 296 | goto drop; |
6c73ade6 BJ |
297 | } |
298 | ||
299 | /* | |
34c22ab5 BJ |
300 | * Data for a protocol. Dispatch to the appropriate |
301 | * protocol routine (running at software interrupt). | |
302 | * If this isn't a raw interface, advance pointer | |
303 | * into mbuf past leader. | |
6c73ade6 BJ |
304 | */ |
305 | switch (ip->il_link) { | |
306 | ||
307 | #ifdef INET | |
308 | case IMPLINK_IP: | |
309 | m->m_len -= sizeof(struct imp_leader); | |
310 | m->m_off += sizeof(struct imp_leader); | |
9c8692e9 | 311 | schednetisr(NETISR_IP); |
6c73ade6 BJ |
312 | inq = &ipintrq; |
313 | break; | |
314 | #endif | |
315 | ||
316 | default: | |
654fef96 | 317 | rawlinkin: |
6c73ade6 | 318 | impproto.sp_protocol = ip->il_link; |
ee787340 SL |
319 | sin = (struct sockaddr_in *)&sc->imp_if.if_addr; |
320 | impdst.sin_addr = sin->sin_addr;; | |
faad37c0 SL |
321 | impsrc.sin_addr.s_net = ip->il_network; |
322 | impsrc.sin_addr.s_host = ip->il_host; | |
323 | impsrc.sin_addr.s_imp = ip->il_imp; | |
57aa3090 SL |
324 | raw_input(m, &impproto, (struct sockaddr *)&impsrc, |
325 | (struct sockaddr *)&impdst); | |
6c73ade6 BJ |
326 | return; |
327 | } | |
1e977657 BJ |
328 | if (IF_QFULL(inq)) { |
329 | IF_DROP(inq); | |
330 | goto drop; | |
331 | } | |
6c73ade6 BJ |
332 | IF_ENQUEUE(inq, m); |
333 | return; | |
334 | ||
335 | drop: | |
336 | m_freem(m); | |
337 | } | |
338 | ||
a0b7c7fb SL |
339 | /* |
340 | * Bring the IMP down after notification. | |
341 | */ | |
342 | impdown(sc) | |
343 | struct imp_softc *sc; | |
344 | { | |
1e977657 | 345 | |
a0b7c7fb | 346 | sc->imp_state = IMPS_DOWN; |
e33b5b1a | 347 | impmsg(sc, "marked down"); |
ba45553a | 348 | hostreset(sc->imp_if.if_net); |
72e4f44e | 349 | if_down(&sc->imp_if); |
a0b7c7fb SL |
350 | } |
351 | ||
6c73ade6 | 352 | /*VARARGS*/ |
e33b5b1a | 353 | impmsg(sc, fmt, a1, a2) |
6c73ade6 BJ |
354 | struct imp_softc *sc; |
355 | char *fmt; | |
668cc26d | 356 | u_int a1; |
6c73ade6 | 357 | { |
1e977657 | 358 | |
6c73ade6 BJ |
359 | printf("imp%d: ", sc->imp_if.if_unit); |
360 | printf(fmt, a1, a2); | |
361 | printf("\n"); | |
362 | } | |
363 | ||
72e4f44e SL |
364 | /* |
365 | * Process an IMP "error" message, passing this | |
366 | * up to the higher level protocol. | |
367 | */ | |
368 | impnotify(what, cp, hp) | |
369 | int what; | |
370 | struct control_leader *cp; | |
371 | struct host *hp; | |
372 | { | |
373 | struct in_addr in; | |
374 | ||
375 | #ifdef notdef | |
376 | in.s_net = cp->dl_network; | |
377 | #else | |
ba45553a | 378 | in.s_net = 10; /* XXX */ |
72e4f44e SL |
379 | #endif |
380 | in.s_host = cp->dl_host; | |
381 | in.s_imp = cp->dl_imp; | |
382 | if (cp->dl_link != IMPLINK_IP) | |
383 | raw_ctlinput(what, (caddr_t)&in); | |
384 | else | |
385 | ip_ctlinput(what, (caddr_t)&in); | |
ba45553a SL |
386 | if (hp) { |
387 | hp->h_flags |= (1 << what); | |
72e4f44e | 388 | hostfree(hp); |
ba45553a | 389 | } |
72e4f44e SL |
390 | } |
391 | ||
6c73ade6 BJ |
392 | /* |
393 | * ARPAnet 1822 output routine. | |
394 | * Called from higher level protocol routines to set up messages for | |
395 | * transmission to the imp. Sets up the header and calls impsnd to | |
396 | * enqueue the message for this IMP's hardware driver. | |
397 | */ | |
ee787340 | 398 | impoutput(ifp, m0, dst) |
6c73ade6 BJ |
399 | register struct ifnet *ifp; |
400 | struct mbuf *m0; | |
ee787340 | 401 | struct sockaddr *dst; |
6c73ade6 BJ |
402 | { |
403 | register struct imp_leader *imp; | |
404 | register struct mbuf *m = m0; | |
1e63a6ab | 405 | int x, dhost, dimp, dlink, len, dnet; |
8a2f82db | 406 | int error = 0; |
6c73ade6 BJ |
407 | |
408 | /* | |
409 | * Don't even try if the IMP is unavailable. | |
410 | */ | |
8a2f82db SL |
411 | if (imp_softc[ifp->if_unit].imp_state != IMPS_UP) { |
412 | error = ENETDOWN; | |
a0b7c7fb | 413 | goto drop; |
8a2f82db | 414 | } |
6c73ade6 | 415 | |
ee787340 | 416 | switch (dst->sa_family) { |
6c73ade6 BJ |
417 | |
418 | #ifdef INET | |
ee787340 SL |
419 | case AF_INET: { |
420 | struct ip *ip = mtod(m0, struct ip *); | |
421 | struct sockaddr_in *sin = (struct sockaddr_in *)dst; | |
6c73ade6 | 422 | |
ee787340 SL |
423 | dhost = sin->sin_addr.s_host; |
424 | dimp = sin->sin_addr.s_impno; | |
6c73ade6 | 425 | dlink = IMPLINK_IP; |
1e63a6ab | 426 | dnet = 0; |
668cc26d | 427 | len = ntohs((u_short)ip->ip_len); |
6c73ade6 BJ |
428 | break; |
429 | } | |
430 | #endif | |
ee787340 | 431 | case AF_IMPLINK: |
6c73ade6 BJ |
432 | goto leaderexists; |
433 | ||
434 | default: | |
ee787340 SL |
435 | printf("imp%d: can't handle af%d\n", ifp->if_unit, |
436 | dst->sa_family); | |
8a2f82db | 437 | error = EAFNOSUPPORT; |
a0b7c7fb | 438 | goto drop; |
6c73ade6 BJ |
439 | } |
440 | ||
441 | /* | |
442 | * Add IMP leader. If there's not enough space in the | |
443 | * first mbuf, allocate another. If that should fail, we | |
444 | * drop this sucker. | |
445 | */ | |
446 | if (m->m_off > MMAXOFF || | |
447 | MMINOFF + sizeof(struct imp_leader) > m->m_off) { | |
448 | m = m_get(M_DONTWAIT); | |
8a2f82db SL |
449 | if (m == 0) { |
450 | error = ENOBUFS; | |
a0b7c7fb | 451 | goto drop; |
8a2f82db | 452 | } |
6c73ade6 | 453 | m->m_next = m0; |
6c73ade6 BJ |
454 | m->m_len = sizeof(struct imp_leader); |
455 | } else { | |
456 | m->m_off -= sizeof(struct imp_leader); | |
457 | m->m_len += sizeof(struct imp_leader); | |
458 | } | |
459 | imp = mtod(m, struct imp_leader *); | |
460 | imp->il_format = IMP_NFF; | |
41e530c7 | 461 | imp->il_mtype = IMPTYPE_DATA; |
1e63a6ab | 462 | imp->il_network = dnet; |
6c73ade6 | 463 | imp->il_host = dhost; |
1e63a6ab | 464 | imp->il_imp = htons((u_short)dimp); |
668cc26d SL |
465 | imp->il_length = |
466 | htons((u_short)(len + sizeof(struct imp_leader)) << 3); | |
6c73ade6 | 467 | imp->il_link = dlink; |
41e530c7 | 468 | imp->il_flags = imp->il_htype = imp->il_subtype = 0; |
6c73ade6 BJ |
469 | |
470 | leaderexists: | |
6c73ade6 | 471 | return (impsnd(ifp, m)); |
a0b7c7fb SL |
472 | drop: |
473 | m_freem(m0); | |
8a2f82db | 474 | return (error); |
6c73ade6 BJ |
475 | } |
476 | ||
477 | /* | |
478 | * Put a message on an interface's output queue. | |
479 | * Perform RFNM counting: no more than 8 message may be | |
480 | * in flight to any one host. | |
481 | */ | |
482 | impsnd(ifp, m) | |
483 | struct ifnet *ifp; | |
484 | struct mbuf *m; | |
485 | { | |
486 | register struct imp_leader *ip; | |
487 | register struct host *hp; | |
488 | struct impcb *icp; | |
ba45553a | 489 | int s, error; |
6c73ade6 BJ |
490 | |
491 | ip = mtod(m, struct imp_leader *); | |
492 | ||
493 | /* | |
494 | * Do RFNM counting for data messages | |
495 | * (no more than 8 outstanding to any host) | |
496 | */ | |
ba45553a | 497 | s = splimp(); |
6c73ade6 BJ |
498 | if (ip->il_mtype == IMPTYPE_DATA) { |
499 | struct in_addr addr; | |
500 | ||
41e530c7 | 501 | #ifdef notdef |
a2cd4df7 | 502 | addr.s_net = ip->il_network; |
41e530c7 | 503 | #else |
ba45553a | 504 | addr.s_net = ifp->if_net; /* XXX */ |
41e530c7 | 505 | #endif |
6c73ade6 BJ |
506 | addr.s_host = ip->il_host; |
507 | addr.s_imp = ip->il_imp; | |
a2cd4df7 BJ |
508 | if ((hp = hostlookup(addr)) == 0) |
509 | hp = hostenter(addr); | |
ba45553a | 510 | if (hp && (hp->h_flags & (HF_DEAD|HF_UNREACH))) { |
67387c9c | 511 | error = hp->h_flags&HF_DEAD ? EHOSTDOWN : EHOSTUNREACH; |
ba45553a SL |
512 | hp->h_timer = HOSTTIMER; |
513 | hp->h_flags &= ~HF_INUSE; | |
514 | goto bad; | |
ba45553a | 515 | } |
6c73ade6 BJ |
516 | |
517 | /* | |
a0b7c7fb | 518 | * If IMP would block, queue until RFNM |
6c73ade6 BJ |
519 | */ |
520 | if (hp) { | |
6c73ade6 BJ |
521 | if (hp->h_rfnm < 8) { |
522 | hp->h_rfnm++; | |
523 | goto enque; | |
524 | } | |
fcd78660 BJ |
525 | if (hp->h_qcnt < 8) { /* high water mark */ |
526 | HOST_ENQUE(hp, m); | |
527 | goto start; | |
528 | } | |
6c73ade6 | 529 | } |
ba45553a SL |
530 | error = ENOBUFS; |
531 | goto bad; | |
6c73ade6 BJ |
532 | } |
533 | enque: | |
1e977657 BJ |
534 | if (IF_QFULL(&ifp->if_snd)) { |
535 | IF_DROP(&ifp->if_snd); | |
ba45553a SL |
536 | error = ENOBUFS; |
537 | bad: | |
1e977657 | 538 | m_freem(m); |
ba45553a SL |
539 | splx(s); |
540 | return (error); | |
1e977657 | 541 | } |
6c73ade6 | 542 | IF_ENQUEUE(&ifp->if_snd, m); |
6c73ade6 BJ |
543 | start: |
544 | icp = &imp_softc[ifp->if_unit].imp_cb; | |
545 | if (icp->ic_oactive == 0) | |
546 | (*icp->ic_start)(ifp->if_unit); | |
70e3101c | 547 | splx(s); |
8a2f82db | 548 | return (0); |
6c73ade6 BJ |
549 | } |
550 | ||
551 | /* | |
552 | * Put three 1822 NOOPs at the head of the output queue. | |
553 | * Part of host-IMP initialization procedure. | |
554 | * (Should return success/failure, but noone knows | |
555 | * what to do with this, so why bother?) | |
0dc78444 SL |
556 | * This routine is always called at splimp, so we don't |
557 | * protect the call to IF_PREPEND. | |
6c73ade6 BJ |
558 | */ |
559 | impnoops(sc) | |
560 | register struct imp_softc *sc; | |
561 | { | |
562 | register i; | |
563 | register struct mbuf *m; | |
a2cd4df7 | 564 | register struct control_leader *cp; |
6c73ade6 BJ |
565 | int x; |
566 | ||
6c73ade6 | 567 | sc->imp_dropcnt = IMP_DROPCNT; |
a2cd4df7 | 568 | for (i = 0; i < IMP_DROPCNT + 1; i++ ) { |
6c73ade6 BJ |
569 | if ((m = m_getclr(M_DONTWAIT)) == 0) |
570 | return; | |
a2cd4df7 BJ |
571 | m->m_len = sizeof(struct control_leader); |
572 | cp = mtod(m, struct control_leader *); | |
573 | cp->dl_format = IMP_NFF; | |
574 | cp->dl_link = i; | |
575 | cp->dl_mtype = IMPTYPE_NOOP; | |
6c73ade6 | 576 | IF_PREPEND(&sc->imp_if.if_snd, m); |
6c73ade6 BJ |
577 | } |
578 | if (sc->imp_cb.ic_oactive == 0) | |
579 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); | |
580 | } | |
7dfb87a5 SL |
581 | |
582 | #ifdef IMPLEADERS | |
583 | printleader(routine, ip) | |
584 | char *routine; | |
585 | register struct imp_leader *ip; | |
586 | { | |
587 | printf("%s: ", routine); | |
588 | printbyte((char *)ip, 12); | |
589 | printf("<fmt=%x,net=%x,flags=%x,mtype=", ip->il_format, ip->il_network, | |
590 | ip->il_flags); | |
591 | if (ip->il_mtype <= IMPTYPE_READY) | |
592 | printf("%s,", impleaders[ip->il_mtype]); | |
593 | else | |
594 | printf("%x,", ip->il_mtype); | |
595 | printf("htype=%x,host=%x,imp=%x,link=", ip->il_htype, ip->il_host, | |
596 | ntohs(ip->il_imp)); | |
597 | if (ip->il_link == IMPLINK_IP) | |
598 | printf("ip,"); | |
599 | else | |
600 | printf("%x,", ip->il_link); | |
601 | printf("subtype=%x,len=%x>\n",ip->il_subtype,ntohs(ip->il_length)>>3); | |
602 | } | |
603 | ||
604 | printbyte(cp, n) | |
605 | register char *cp; | |
606 | int n; | |
607 | { | |
608 | register i, j, c; | |
609 | ||
610 | for (i=0; i<n; i++) { | |
611 | c = *cp++; | |
612 | for (j=0; j<2; j++) | |
613 | putchar("0123456789abcdef"[(c>>((1-j)*4))&0xf]); | |
614 | putchar(' '); | |
615 | } | |
616 | putchar('\n'); | |
617 | } | |
618 | #endif | |
41e530c7 | 619 | #endif |