Commit | Line | Data |
---|---|---|
b690198c | 1 | /* if_imp.c 4.35 82/06/15 */ |
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 BJ |
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 */ |
ee787340 SL |
90 | sin = (struct sockaddr_in *)&ifp->if_addr; |
91 | sin->sin_family = AF_INET; | |
92 | sin->sin_addr = if_makeaddr(ifp->if_net, 0); | |
a2cd4df7 BJ |
93 | ifp->if_init = impinit; |
94 | ifp->if_output = impoutput; | |
95 | /* reset is handled at the hardware level */ | |
6c73ade6 | 96 | if_attach(ifp); |
6c73ade6 BJ |
97 | return ((int)&sc->imp_if); |
98 | } | |
99 | ||
100 | /* | |
101 | * IMP initialization routine: call hardware module to | |
102 | * setup UNIBUS resources, init state and get ready for | |
103 | * NOOPs the IMP should send us, and that we want to drop. | |
104 | */ | |
105 | impinit(unit) | |
106 | int unit; | |
107 | { | |
98b6195e | 108 | int s = splimp(); |
6c73ade6 BJ |
109 | register struct imp_softc *sc = &imp_softc[unit]; |
110 | ||
98b6195e | 111 | COUNT(IMPINIT); |
a2cd4df7 BJ |
112 | if ((*sc->imp_cb.ic_init)(unit) == 0) { |
113 | sc->imp_state = IMPS_DOWN; | |
ee787340 | 114 | sc->imp_if.if_flags &= ~IFF_UP; |
98b6195e | 115 | splx(s); |
a2cd4df7 BJ |
116 | return; |
117 | } | |
6c73ade6 | 118 | sc->imp_state = IMPS_INIT; |
a2cd4df7 | 119 | impnoops(sc); |
a13c006d | 120 | if_rtinit(&sc->imp_if, RTF_UP); |
98b6195e | 121 | splx(s); |
6c73ade6 BJ |
122 | } |
123 | ||
124 | struct sockproto impproto = { PF_IMPLINK }; | |
faad37c0 SL |
125 | struct sockaddr_in impdst = { AF_IMPLINK }; |
126 | struct sockaddr_in impsrc = { AF_IMPLINK }; | |
b690198c | 127 | #ifdef IMPLEADERS |
7dfb87a5 | 128 | int impprintfs = 0; |
b690198c | 129 | #endif |
6c73ade6 BJ |
130 | |
131 | /* | |
132 | * ARPAnet 1822 input routine. | |
133 | * Called from hardware input interrupt routine to handle 1822 | |
134 | * IMP-host messages. Type 0 messages (non-control) are | |
135 | * passed to higher level protocol processors on the basis | |
136 | * of link number. Other type messages (control) are handled here. | |
137 | */ | |
a2cd4df7 | 138 | impinput(unit, m) |
6c73ade6 | 139 | int unit; |
a2cd4df7 | 140 | register struct mbuf *m; |
6c73ade6 | 141 | { |
6c73ade6 BJ |
142 | register struct imp_leader *ip; |
143 | register struct imp_softc *sc = &imp_softc[unit]; | |
144 | register struct host *hp; | |
145 | register struct ifqueue *inq; | |
a2cd4df7 | 146 | struct control_leader *cp; |
6c73ade6 | 147 | struct in_addr addr; |
e33b5b1a | 148 | struct mbuf *next; |
ee787340 | 149 | struct sockaddr_in *sin; |
6c73ade6 | 150 | |
5cda82aa | 151 | COUNT(IMPINPUT); |
34c22ab5 | 152 | /* verify leader length. */ |
a2cd4df7 BJ |
153 | if (m->m_len < sizeof(struct control_leader) && |
154 | (m = m_pullup(m, sizeof(struct control_leader))) == 0) | |
155 | return; | |
156 | cp = mtod(m, struct control_leader *); | |
157 | if (cp->dl_mtype == IMPTYPE_DATA) | |
158 | if (m->m_len < sizeof(struct imp_leader) && | |
159 | (m = m_pullup(m, sizeof(struct imp_leader))) == 0) | |
160 | return; | |
6c73ade6 | 161 | ip = mtod(m, struct imp_leader *); |
b690198c | 162 | #ifdef IMPLEADERS |
7dfb87a5 SL |
163 | if (impprintfs) |
164 | printleader("impinput", ip); | |
b690198c | 165 | #endif |
6c73ade6 | 166 | |
34c22ab5 | 167 | /* check leader type */ |
a2cd4df7 BJ |
168 | if (ip->il_format != IMP_NFF) { |
169 | sc->imp_if.if_collisions++; /* XXX */ | |
6c73ade6 | 170 | goto drop; |
a2cd4df7 | 171 | } |
6c73ade6 | 172 | |
ba45553a | 173 | if (ip->il_mtype != IMPTYPE_DATA) { |
41e530c7 | 174 | #ifdef notdef |
a2cd4df7 | 175 | addr.s_net = ip->il_network; |
41e530c7 | 176 | #else |
ba45553a | 177 | addr.s_net = sc->imp_if.if_net; |
41e530c7 | 178 | #endif |
a2cd4df7 BJ |
179 | addr.s_imp = ip->il_imp; |
180 | addr.s_host = ip->il_host; | |
6c73ade6 | 181 | } |
6c73ade6 BJ |
182 | switch (ip->il_mtype) { |
183 | ||
6c73ade6 | 184 | case IMPTYPE_DATA: |
6c73ade6 BJ |
185 | break; |
186 | ||
187 | /* | |
188 | * IMP leader error. Reset the IMP and discard the packet. | |
189 | */ | |
190 | case IMPTYPE_BADLEADER: | |
a0b7c7fb SL |
191 | /* |
192 | * According to 1822 document, this message | |
193 | * will be generated in response to the | |
194 | * first noop sent to the IMP after | |
195 | * the host resets the IMP interface. | |
196 | */ | |
a2cd4df7 | 197 | if (sc->imp_state != IMPS_INIT) { |
e33b5b1a | 198 | impmsg(sc, "leader error"); |
72e4f44e | 199 | hostreset(sc->imp_if.if_net); |
a0b7c7fb SL |
200 | impnoops(sc); |
201 | } | |
72e4f44e | 202 | goto drop; |
6c73ade6 BJ |
203 | |
204 | /* | |
205 | * IMP going down. Print message, and if not immediate, | |
206 | * set off a timer to insure things will be reset at the | |
207 | * appropriate time. | |
208 | */ | |
209 | case IMPTYPE_DOWN: | |
f32a85bb | 210 | if (sc->imp_state < IMPS_INIT) |
47e51140 | 211 | goto drop; |
6c73ade6 BJ |
212 | if ((ip->il_link & IMP_DMASK) == 0) { |
213 | sc->imp_state = IMPS_GOINGDOWN; | |
668cc26d | 214 | timeout(impdown, (caddr_t)sc, 30 * hz); |
6c73ade6 | 215 | } |
668cc26d SL |
216 | impmsg(sc, "going down %s", |
217 | (u_int)impmessage[ip->il_link&IMP_DMASK]); | |
72e4f44e | 218 | goto drop; |
6c73ade6 BJ |
219 | |
220 | /* | |
221 | * A NOP usually seen during the initialization sequence. | |
222 | * Compare the local address with that in the message. | |
223 | * Reset the local address notion if it doesn't match. | |
224 | */ | |
ee787340 | 225 | case IMPTYPE_NOOP: |
a0b7c7fb SL |
226 | if (sc->imp_state == IMPS_DOWN) { |
227 | sc->imp_state = IMPS_INIT; | |
228 | sc->imp_dropcnt = IMP_DROPCNT; | |
229 | } | |
98b6195e | 230 | if (sc->imp_state == IMPS_INIT && --sc->imp_dropcnt > 0) |
e431883e | 231 | goto drop; |
98b6195e SL |
232 | sin = (struct sockaddr_in *)&sc->imp_if.if_addr; |
233 | if (sin->sin_addr.s_host != ip->il_host || | |
234 | sin->sin_addr.s_imp != ip->il_imp) { | |
235 | sc->imp_if.if_host[0] = | |
236 | sin->sin_addr.s_host = ip->il_host; | |
237 | sin->sin_addr.s_imp = ip->il_imp; | |
238 | impmsg(sc, "reset (host %d/imp %d)", (u_int)ip->il_host, | |
239 | ntohs(ip->il_imp)); | |
240 | } | |
a2cd4df7 | 241 | sc->imp_state = IMPS_UP; |
ee787340 | 242 | sc->imp_if.if_flags |= IFF_UP; |
e431883e | 243 | goto drop; |
6c73ade6 BJ |
244 | |
245 | /* | |
72e4f44e SL |
246 | * RFNM or INCOMPLETE message, send next |
247 | * message on the q. We could pass incomplete's | |
248 | * up to the next level, but this currently isn't | |
249 | * needed. | |
6c73ade6 BJ |
250 | */ |
251 | case IMPTYPE_RFNM: | |
252 | case IMPTYPE_INCOMPLETE: | |
ba45553a SL |
253 | if (hp = hostlookup(addr)) { |
254 | if (hp->h_rfnm == 0) | |
255 | hp->h_flags &= ~HF_INUSE; | |
256 | else if (next = hostdeque(hp)) | |
257 | (void) impsnd(&sc->imp_if, next); | |
258 | } | |
e431883e | 259 | goto drop; |
6c73ade6 BJ |
260 | |
261 | /* | |
262 | * Host or IMP can't be reached. Flush any packets | |
263 | * awaiting transmission and release the host structure. | |
6c73ade6 BJ |
264 | */ |
265 | case IMPTYPE_HOSTDEAD: | |
ba45553a SL |
266 | case IMPTYPE_HOSTUNREACH: { |
267 | int s = splnet(); | |
268 | impnotify(ip->il_mtype, ip, hostlookup(addr)); | |
269 | splx(s); | |
41e530c7 | 270 | goto rawlinkin; |
ba45553a | 271 | } |
6c73ade6 BJ |
272 | |
273 | /* | |
274 | * Error in data. Clear RFNM status for this host and send | |
275 | * noops to the IMP to clear the interface. | |
276 | */ | |
ba45553a SL |
277 | case IMPTYPE_BADDATA: { |
278 | int s; | |
279 | ||
e33b5b1a | 280 | impmsg(sc, "data error"); |
ba45553a SL |
281 | s = splnet(); |
282 | if (hp = hostlookup(addr)) | |
6c73ade6 | 283 | hp->h_rfnm = 0; |
ba45553a | 284 | splx(s); |
6c73ade6 | 285 | impnoops(sc); |
72e4f44e | 286 | goto drop; |
ba45553a | 287 | } |
6c73ade6 BJ |
288 | |
289 | /* | |
a0b7c7fb | 290 | * Interface reset. |
6c73ade6 BJ |
291 | */ |
292 | case IMPTYPE_RESET: | |
e33b5b1a | 293 | impmsg(sc, "interface reset"); |
a0b7c7fb | 294 | impnoops(sc); |
72e4f44e | 295 | goto drop; |
6c73ade6 BJ |
296 | |
297 | default: | |
298 | sc->imp_if.if_collisions++; /* XXX */ | |
72e4f44e | 299 | goto drop; |
6c73ade6 BJ |
300 | } |
301 | ||
302 | /* | |
34c22ab5 BJ |
303 | * Data for a protocol. Dispatch to the appropriate |
304 | * protocol routine (running at software interrupt). | |
305 | * If this isn't a raw interface, advance pointer | |
306 | * into mbuf past leader. | |
6c73ade6 BJ |
307 | */ |
308 | switch (ip->il_link) { | |
309 | ||
310 | #ifdef INET | |
311 | case IMPLINK_IP: | |
312 | m->m_len -= sizeof(struct imp_leader); | |
313 | m->m_off += sizeof(struct imp_leader); | |
9c8692e9 | 314 | schednetisr(NETISR_IP); |
6c73ade6 BJ |
315 | inq = &ipintrq; |
316 | break; | |
317 | #endif | |
318 | ||
319 | default: | |
654fef96 | 320 | rawlinkin: |
6c73ade6 | 321 | impproto.sp_protocol = ip->il_link; |
ee787340 SL |
322 | sin = (struct sockaddr_in *)&sc->imp_if.if_addr; |
323 | impdst.sin_addr = sin->sin_addr;; | |
faad37c0 SL |
324 | impsrc.sin_addr.s_net = ip->il_network; |
325 | impsrc.sin_addr.s_host = ip->il_host; | |
326 | impsrc.sin_addr.s_imp = ip->il_imp; | |
57aa3090 SL |
327 | raw_input(m, &impproto, (struct sockaddr *)&impsrc, |
328 | (struct sockaddr *)&impdst); | |
6c73ade6 BJ |
329 | return; |
330 | } | |
1e977657 BJ |
331 | if (IF_QFULL(inq)) { |
332 | IF_DROP(inq); | |
333 | goto drop; | |
334 | } | |
6c73ade6 BJ |
335 | IF_ENQUEUE(inq, m); |
336 | return; | |
337 | ||
338 | drop: | |
339 | m_freem(m); | |
340 | } | |
341 | ||
a0b7c7fb SL |
342 | /* |
343 | * Bring the IMP down after notification. | |
344 | */ | |
345 | impdown(sc) | |
346 | struct imp_softc *sc; | |
347 | { | |
1e977657 | 348 | |
ba45553a | 349 | COUNT(IMPDOWN); |
a0b7c7fb | 350 | sc->imp_state = IMPS_DOWN; |
e33b5b1a | 351 | impmsg(sc, "marked down"); |
ba45553a | 352 | hostreset(sc->imp_if.if_net); |
72e4f44e | 353 | if_down(&sc->imp_if); |
a0b7c7fb SL |
354 | } |
355 | ||
6c73ade6 | 356 | /*VARARGS*/ |
e33b5b1a | 357 | impmsg(sc, fmt, a1, a2) |
6c73ade6 BJ |
358 | struct imp_softc *sc; |
359 | char *fmt; | |
668cc26d | 360 | u_int a1; |
6c73ade6 | 361 | { |
1e977657 | 362 | |
ba45553a | 363 | COUNT(IMPMSG); |
6c73ade6 BJ |
364 | printf("imp%d: ", sc->imp_if.if_unit); |
365 | printf(fmt, a1, a2); | |
366 | printf("\n"); | |
367 | } | |
368 | ||
72e4f44e SL |
369 | /* |
370 | * Process an IMP "error" message, passing this | |
371 | * up to the higher level protocol. | |
372 | */ | |
373 | impnotify(what, cp, hp) | |
374 | int what; | |
375 | struct control_leader *cp; | |
376 | struct host *hp; | |
377 | { | |
378 | struct in_addr in; | |
379 | ||
ba45553a | 380 | COUNT(IMPNOTIFY); |
72e4f44e SL |
381 | #ifdef notdef |
382 | in.s_net = cp->dl_network; | |
383 | #else | |
ba45553a | 384 | in.s_net = 10; /* XXX */ |
72e4f44e SL |
385 | #endif |
386 | in.s_host = cp->dl_host; | |
387 | in.s_imp = cp->dl_imp; | |
388 | if (cp->dl_link != IMPLINK_IP) | |
389 | raw_ctlinput(what, (caddr_t)&in); | |
390 | else | |
391 | ip_ctlinput(what, (caddr_t)&in); | |
ba45553a SL |
392 | if (hp) { |
393 | hp->h_flags |= (1 << what); | |
72e4f44e | 394 | hostfree(hp); |
ba45553a | 395 | } |
72e4f44e SL |
396 | } |
397 | ||
6c73ade6 BJ |
398 | /* |
399 | * ARPAnet 1822 output routine. | |
400 | * Called from higher level protocol routines to set up messages for | |
401 | * transmission to the imp. Sets up the header and calls impsnd to | |
402 | * enqueue the message for this IMP's hardware driver. | |
403 | */ | |
ee787340 | 404 | impoutput(ifp, m0, dst) |
6c73ade6 BJ |
405 | register struct ifnet *ifp; |
406 | struct mbuf *m0; | |
ee787340 | 407 | struct sockaddr *dst; |
6c73ade6 BJ |
408 | { |
409 | register struct imp_leader *imp; | |
410 | register struct mbuf *m = m0; | |
1e63a6ab | 411 | int x, dhost, dimp, dlink, len, dnet; |
8a2f82db | 412 | int error = 0; |
6c73ade6 | 413 | |
a2cd4df7 | 414 | COUNT(IMPOUTPUT); |
6c73ade6 BJ |
415 | /* |
416 | * Don't even try if the IMP is unavailable. | |
417 | */ | |
8a2f82db SL |
418 | if (imp_softc[ifp->if_unit].imp_state != IMPS_UP) { |
419 | error = ENETDOWN; | |
a0b7c7fb | 420 | goto drop; |
8a2f82db | 421 | } |
6c73ade6 | 422 | |
ee787340 | 423 | switch (dst->sa_family) { |
6c73ade6 BJ |
424 | |
425 | #ifdef INET | |
ee787340 SL |
426 | case AF_INET: { |
427 | struct ip *ip = mtod(m0, struct ip *); | |
428 | struct sockaddr_in *sin = (struct sockaddr_in *)dst; | |
6c73ade6 | 429 | |
ee787340 SL |
430 | dhost = sin->sin_addr.s_host; |
431 | dimp = sin->sin_addr.s_impno; | |
6c73ade6 | 432 | dlink = IMPLINK_IP; |
1e63a6ab | 433 | dnet = 0; |
668cc26d | 434 | len = ntohs((u_short)ip->ip_len); |
6c73ade6 BJ |
435 | break; |
436 | } | |
437 | #endif | |
ee787340 | 438 | case AF_IMPLINK: |
6c73ade6 BJ |
439 | goto leaderexists; |
440 | ||
441 | default: | |
ee787340 SL |
442 | printf("imp%d: can't handle af%d\n", ifp->if_unit, |
443 | dst->sa_family); | |
8a2f82db | 444 | error = EAFNOSUPPORT; |
a0b7c7fb | 445 | goto drop; |
6c73ade6 BJ |
446 | } |
447 | ||
448 | /* | |
449 | * Add IMP leader. If there's not enough space in the | |
450 | * first mbuf, allocate another. If that should fail, we | |
451 | * drop this sucker. | |
452 | */ | |
453 | if (m->m_off > MMAXOFF || | |
454 | MMINOFF + sizeof(struct imp_leader) > m->m_off) { | |
455 | m = m_get(M_DONTWAIT); | |
8a2f82db SL |
456 | if (m == 0) { |
457 | error = ENOBUFS; | |
a0b7c7fb | 458 | goto drop; |
8a2f82db | 459 | } |
6c73ade6 BJ |
460 | m->m_next = m0; |
461 | m->m_off = MMINOFF; | |
462 | m->m_len = sizeof(struct imp_leader); | |
463 | } else { | |
464 | m->m_off -= sizeof(struct imp_leader); | |
465 | m->m_len += sizeof(struct imp_leader); | |
466 | } | |
467 | imp = mtod(m, struct imp_leader *); | |
468 | imp->il_format = IMP_NFF; | |
41e530c7 | 469 | imp->il_mtype = IMPTYPE_DATA; |
1e63a6ab | 470 | imp->il_network = dnet; |
6c73ade6 | 471 | imp->il_host = dhost; |
1e63a6ab | 472 | imp->il_imp = htons((u_short)dimp); |
668cc26d SL |
473 | imp->il_length = |
474 | htons((u_short)(len + sizeof(struct imp_leader)) << 3); | |
6c73ade6 | 475 | imp->il_link = dlink; |
41e530c7 | 476 | imp->il_flags = imp->il_htype = imp->il_subtype = 0; |
6c73ade6 BJ |
477 | |
478 | leaderexists: | |
6c73ade6 | 479 | return (impsnd(ifp, m)); |
a0b7c7fb SL |
480 | drop: |
481 | m_freem(m0); | |
8a2f82db | 482 | return (error); |
6c73ade6 BJ |
483 | } |
484 | ||
485 | /* | |
486 | * Put a message on an interface's output queue. | |
487 | * Perform RFNM counting: no more than 8 message may be | |
488 | * in flight to any one host. | |
489 | */ | |
490 | impsnd(ifp, m) | |
491 | struct ifnet *ifp; | |
492 | struct mbuf *m; | |
493 | { | |
494 | register struct imp_leader *ip; | |
495 | register struct host *hp; | |
496 | struct impcb *icp; | |
ba45553a | 497 | int s, error; |
6c73ade6 | 498 | |
a2cd4df7 | 499 | COUNT(IMPSND); |
6c73ade6 BJ |
500 | ip = mtod(m, struct imp_leader *); |
501 | ||
502 | /* | |
503 | * Do RFNM counting for data messages | |
504 | * (no more than 8 outstanding to any host) | |
505 | */ | |
ba45553a | 506 | s = splimp(); |
6c73ade6 BJ |
507 | if (ip->il_mtype == IMPTYPE_DATA) { |
508 | struct in_addr addr; | |
509 | ||
41e530c7 | 510 | #ifdef notdef |
a2cd4df7 | 511 | addr.s_net = ip->il_network; |
41e530c7 | 512 | #else |
ba45553a | 513 | addr.s_net = ifp->if_net; /* XXX */ |
41e530c7 | 514 | #endif |
6c73ade6 BJ |
515 | addr.s_host = ip->il_host; |
516 | addr.s_imp = ip->il_imp; | |
a2cd4df7 BJ |
517 | if ((hp = hostlookup(addr)) == 0) |
518 | hp = hostenter(addr); | |
ba45553a | 519 | if (hp && (hp->h_flags & (HF_DEAD|HF_UNREACH))) { |
67387c9c | 520 | error = hp->h_flags&HF_DEAD ? EHOSTDOWN : EHOSTUNREACH; |
ba45553a SL |
521 | hp->h_timer = HOSTTIMER; |
522 | hp->h_flags &= ~HF_INUSE; | |
523 | goto bad; | |
ba45553a | 524 | } |
6c73ade6 BJ |
525 | |
526 | /* | |
a0b7c7fb | 527 | * If IMP would block, queue until RFNM |
6c73ade6 BJ |
528 | */ |
529 | if (hp) { | |
6c73ade6 BJ |
530 | if (hp->h_rfnm < 8) { |
531 | hp->h_rfnm++; | |
532 | goto enque; | |
533 | } | |
fcd78660 BJ |
534 | if (hp->h_qcnt < 8) { /* high water mark */ |
535 | HOST_ENQUE(hp, m); | |
536 | goto start; | |
537 | } | |
6c73ade6 | 538 | } |
ba45553a SL |
539 | error = ENOBUFS; |
540 | goto bad; | |
6c73ade6 BJ |
541 | } |
542 | enque: | |
1e977657 BJ |
543 | if (IF_QFULL(&ifp->if_snd)) { |
544 | IF_DROP(&ifp->if_snd); | |
ba45553a SL |
545 | error = ENOBUFS; |
546 | bad: | |
1e977657 | 547 | m_freem(m); |
ba45553a SL |
548 | splx(s); |
549 | return (error); | |
1e977657 | 550 | } |
6c73ade6 | 551 | IF_ENQUEUE(&ifp->if_snd, m); |
6c73ade6 BJ |
552 | start: |
553 | icp = &imp_softc[ifp->if_unit].imp_cb; | |
554 | if (icp->ic_oactive == 0) | |
555 | (*icp->ic_start)(ifp->if_unit); | |
70e3101c | 556 | splx(s); |
8a2f82db | 557 | return (0); |
6c73ade6 BJ |
558 | } |
559 | ||
560 | /* | |
561 | * Put three 1822 NOOPs at the head of the output queue. | |
562 | * Part of host-IMP initialization procedure. | |
563 | * (Should return success/failure, but noone knows | |
564 | * what to do with this, so why bother?) | |
0dc78444 SL |
565 | * This routine is always called at splimp, so we don't |
566 | * protect the call to IF_PREPEND. | |
6c73ade6 BJ |
567 | */ |
568 | impnoops(sc) | |
569 | register struct imp_softc *sc; | |
570 | { | |
571 | register i; | |
572 | register struct mbuf *m; | |
a2cd4df7 | 573 | register struct control_leader *cp; |
6c73ade6 BJ |
574 | int x; |
575 | ||
a2cd4df7 | 576 | COUNT(IMPNOOPS); |
6c73ade6 | 577 | sc->imp_dropcnt = IMP_DROPCNT; |
a2cd4df7 | 578 | for (i = 0; i < IMP_DROPCNT + 1; i++ ) { |
6c73ade6 BJ |
579 | if ((m = m_getclr(M_DONTWAIT)) == 0) |
580 | return; | |
581 | m->m_off = MMINOFF; | |
a2cd4df7 BJ |
582 | m->m_len = sizeof(struct control_leader); |
583 | cp = mtod(m, struct control_leader *); | |
584 | cp->dl_format = IMP_NFF; | |
585 | cp->dl_link = i; | |
586 | cp->dl_mtype = IMPTYPE_NOOP; | |
6c73ade6 | 587 | IF_PREPEND(&sc->imp_if.if_snd, m); |
6c73ade6 BJ |
588 | } |
589 | if (sc->imp_cb.ic_oactive == 0) | |
590 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); | |
591 | } | |
7dfb87a5 SL |
592 | |
593 | #ifdef IMPLEADERS | |
594 | printleader(routine, ip) | |
595 | char *routine; | |
596 | register struct imp_leader *ip; | |
597 | { | |
598 | printf("%s: ", routine); | |
599 | printbyte((char *)ip, 12); | |
600 | printf("<fmt=%x,net=%x,flags=%x,mtype=", ip->il_format, ip->il_network, | |
601 | ip->il_flags); | |
602 | if (ip->il_mtype <= IMPTYPE_READY) | |
603 | printf("%s,", impleaders[ip->il_mtype]); | |
604 | else | |
605 | printf("%x,", ip->il_mtype); | |
606 | printf("htype=%x,host=%x,imp=%x,link=", ip->il_htype, ip->il_host, | |
607 | ntohs(ip->il_imp)); | |
608 | if (ip->il_link == IMPLINK_IP) | |
609 | printf("ip,"); | |
610 | else | |
611 | printf("%x,", ip->il_link); | |
612 | printf("subtype=%x,len=%x>\n",ip->il_subtype,ntohs(ip->il_length)>>3); | |
613 | } | |
614 | ||
615 | printbyte(cp, n) | |
616 | register char *cp; | |
617 | int n; | |
618 | { | |
619 | register i, j, c; | |
620 | ||
621 | for (i=0; i<n; i++) { | |
622 | c = *cp++; | |
623 | for (j=0; j<2; j++) | |
624 | putchar("0123456789abcdef"[(c>>((1-j)*4))&0xf]); | |
625 | putchar(' '); | |
626 | } | |
627 | putchar('\n'); | |
628 | } | |
629 | #endif | |
41e530c7 | 630 | #endif |