Commit | Line | Data |
---|---|---|
7dfb87a5 | 1 | /* if_imp.c 4.34 82/06/14 */ |
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" | |
7dfb87a5 | 26 | #define IMPLEADERS |
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 }; | |
7dfb87a5 | 127 | int impprintfs = 0; |
6c73ade6 BJ |
128 | |
129 | /* | |
130 | * ARPAnet 1822 input routine. | |
131 | * Called from hardware input interrupt routine to handle 1822 | |
132 | * IMP-host messages. Type 0 messages (non-control) are | |
133 | * passed to higher level protocol processors on the basis | |
134 | * of link number. Other type messages (control) are handled here. | |
135 | */ | |
a2cd4df7 | 136 | impinput(unit, m) |
6c73ade6 | 137 | int unit; |
a2cd4df7 | 138 | register struct mbuf *m; |
6c73ade6 | 139 | { |
6c73ade6 BJ |
140 | register struct imp_leader *ip; |
141 | register struct imp_softc *sc = &imp_softc[unit]; | |
142 | register struct host *hp; | |
143 | register struct ifqueue *inq; | |
a2cd4df7 | 144 | struct control_leader *cp; |
6c73ade6 | 145 | struct in_addr addr; |
e33b5b1a | 146 | struct mbuf *next; |
ee787340 | 147 | struct sockaddr_in *sin; |
6c73ade6 | 148 | |
5cda82aa | 149 | COUNT(IMPINPUT); |
34c22ab5 | 150 | /* verify leader length. */ |
a2cd4df7 BJ |
151 | if (m->m_len < sizeof(struct control_leader) && |
152 | (m = m_pullup(m, sizeof(struct control_leader))) == 0) | |
153 | return; | |
154 | cp = mtod(m, struct control_leader *); | |
155 | if (cp->dl_mtype == IMPTYPE_DATA) | |
156 | if (m->m_len < sizeof(struct imp_leader) && | |
157 | (m = m_pullup(m, sizeof(struct imp_leader))) == 0) | |
158 | return; | |
6c73ade6 | 159 | ip = mtod(m, struct imp_leader *); |
7dfb87a5 SL |
160 | if (impprintfs) |
161 | printleader("impinput", ip); | |
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; |
7dfb87a5 | 239 | #ifdef notdef |
a2cd4df7 | 240 | /* restart output in case something was q'd */ |
7dfb87a5 SL |
241 | if (sc->imp_cb.ic_oactive == 0) |
242 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); | |
243 | #endif | |
e431883e | 244 | goto drop; |
6c73ade6 BJ |
245 | |
246 | /* | |
72e4f44e SL |
247 | * RFNM or INCOMPLETE message, send next |
248 | * message on the q. We could pass incomplete's | |
249 | * up to the next level, but this currently isn't | |
250 | * needed. | |
6c73ade6 BJ |
251 | */ |
252 | case IMPTYPE_RFNM: | |
253 | case IMPTYPE_INCOMPLETE: | |
ba45553a SL |
254 | if (hp = hostlookup(addr)) { |
255 | if (hp->h_rfnm == 0) | |
256 | hp->h_flags &= ~HF_INUSE; | |
257 | else if (next = hostdeque(hp)) | |
258 | (void) impsnd(&sc->imp_if, next); | |
259 | } | |
e431883e | 260 | goto drop; |
6c73ade6 BJ |
261 | |
262 | /* | |
263 | * Host or IMP can't be reached. Flush any packets | |
264 | * awaiting transmission and release the host structure. | |
6c73ade6 BJ |
265 | */ |
266 | case IMPTYPE_HOSTDEAD: | |
ba45553a SL |
267 | case IMPTYPE_HOSTUNREACH: { |
268 | int s = splnet(); | |
269 | impnotify(ip->il_mtype, ip, hostlookup(addr)); | |
270 | splx(s); | |
41e530c7 | 271 | goto rawlinkin; |
ba45553a | 272 | } |
6c73ade6 BJ |
273 | |
274 | /* | |
275 | * Error in data. Clear RFNM status for this host and send | |
276 | * noops to the IMP to clear the interface. | |
277 | */ | |
ba45553a SL |
278 | case IMPTYPE_BADDATA: { |
279 | int s; | |
280 | ||
e33b5b1a | 281 | impmsg(sc, "data error"); |
ba45553a SL |
282 | s = splnet(); |
283 | if (hp = hostlookup(addr)) | |
6c73ade6 | 284 | hp->h_rfnm = 0; |
ba45553a | 285 | splx(s); |
6c73ade6 | 286 | impnoops(sc); |
72e4f44e | 287 | goto drop; |
ba45553a | 288 | } |
6c73ade6 BJ |
289 | |
290 | /* | |
a0b7c7fb | 291 | * Interface reset. |
6c73ade6 BJ |
292 | */ |
293 | case IMPTYPE_RESET: | |
e33b5b1a | 294 | impmsg(sc, "interface reset"); |
a0b7c7fb | 295 | impnoops(sc); |
72e4f44e | 296 | goto drop; |
6c73ade6 BJ |
297 | |
298 | default: | |
299 | sc->imp_if.if_collisions++; /* XXX */ | |
72e4f44e | 300 | goto drop; |
6c73ade6 BJ |
301 | } |
302 | ||
303 | /* | |
34c22ab5 BJ |
304 | * Data for a protocol. Dispatch to the appropriate |
305 | * protocol routine (running at software interrupt). | |
306 | * If this isn't a raw interface, advance pointer | |
307 | * into mbuf past leader. | |
6c73ade6 BJ |
308 | */ |
309 | switch (ip->il_link) { | |
310 | ||
311 | #ifdef INET | |
312 | case IMPLINK_IP: | |
313 | m->m_len -= sizeof(struct imp_leader); | |
314 | m->m_off += sizeof(struct imp_leader); | |
9c8692e9 | 315 | schednetisr(NETISR_IP); |
6c73ade6 BJ |
316 | inq = &ipintrq; |
317 | break; | |
318 | #endif | |
319 | ||
320 | default: | |
654fef96 | 321 | rawlinkin: |
6c73ade6 | 322 | impproto.sp_protocol = ip->il_link; |
ee787340 SL |
323 | sin = (struct sockaddr_in *)&sc->imp_if.if_addr; |
324 | impdst.sin_addr = sin->sin_addr;; | |
faad37c0 SL |
325 | impsrc.sin_addr.s_net = ip->il_network; |
326 | impsrc.sin_addr.s_host = ip->il_host; | |
327 | impsrc.sin_addr.s_imp = ip->il_imp; | |
57aa3090 SL |
328 | raw_input(m, &impproto, (struct sockaddr *)&impsrc, |
329 | (struct sockaddr *)&impdst); | |
6c73ade6 BJ |
330 | return; |
331 | } | |
1e977657 BJ |
332 | if (IF_QFULL(inq)) { |
333 | IF_DROP(inq); | |
334 | goto drop; | |
335 | } | |
6c73ade6 BJ |
336 | IF_ENQUEUE(inq, m); |
337 | return; | |
338 | ||
339 | drop: | |
340 | m_freem(m); | |
341 | } | |
342 | ||
a0b7c7fb SL |
343 | /* |
344 | * Bring the IMP down after notification. | |
345 | */ | |
346 | impdown(sc) | |
347 | struct imp_softc *sc; | |
348 | { | |
1e977657 | 349 | |
ba45553a | 350 | COUNT(IMPDOWN); |
a0b7c7fb | 351 | sc->imp_state = IMPS_DOWN; |
e33b5b1a | 352 | impmsg(sc, "marked down"); |
ba45553a | 353 | hostreset(sc->imp_if.if_net); |
72e4f44e | 354 | if_down(&sc->imp_if); |
a0b7c7fb SL |
355 | } |
356 | ||
6c73ade6 | 357 | /*VARARGS*/ |
e33b5b1a | 358 | impmsg(sc, fmt, a1, a2) |
6c73ade6 BJ |
359 | struct imp_softc *sc; |
360 | char *fmt; | |
668cc26d | 361 | u_int a1; |
6c73ade6 | 362 | { |
1e977657 | 363 | |
ba45553a | 364 | COUNT(IMPMSG); |
6c73ade6 BJ |
365 | printf("imp%d: ", sc->imp_if.if_unit); |
366 | printf(fmt, a1, a2); | |
367 | printf("\n"); | |
368 | } | |
369 | ||
72e4f44e SL |
370 | /* |
371 | * Process an IMP "error" message, passing this | |
372 | * up to the higher level protocol. | |
373 | */ | |
374 | impnotify(what, cp, hp) | |
375 | int what; | |
376 | struct control_leader *cp; | |
377 | struct host *hp; | |
378 | { | |
379 | struct in_addr in; | |
380 | ||
ba45553a | 381 | COUNT(IMPNOTIFY); |
72e4f44e SL |
382 | #ifdef notdef |
383 | in.s_net = cp->dl_network; | |
384 | #else | |
ba45553a | 385 | in.s_net = 10; /* XXX */ |
72e4f44e SL |
386 | #endif |
387 | in.s_host = cp->dl_host; | |
388 | in.s_imp = cp->dl_imp; | |
389 | if (cp->dl_link != IMPLINK_IP) | |
390 | raw_ctlinput(what, (caddr_t)&in); | |
391 | else | |
392 | ip_ctlinput(what, (caddr_t)&in); | |
ba45553a SL |
393 | if (hp) { |
394 | hp->h_flags |= (1 << what); | |
72e4f44e | 395 | hostfree(hp); |
ba45553a | 396 | } |
72e4f44e SL |
397 | } |
398 | ||
6c73ade6 BJ |
399 | /* |
400 | * ARPAnet 1822 output routine. | |
401 | * Called from higher level protocol routines to set up messages for | |
402 | * transmission to the imp. Sets up the header and calls impsnd to | |
403 | * enqueue the message for this IMP's hardware driver. | |
404 | */ | |
ee787340 | 405 | impoutput(ifp, m0, dst) |
6c73ade6 BJ |
406 | register struct ifnet *ifp; |
407 | struct mbuf *m0; | |
ee787340 | 408 | struct sockaddr *dst; |
6c73ade6 BJ |
409 | { |
410 | register struct imp_leader *imp; | |
411 | register struct mbuf *m = m0; | |
1e63a6ab | 412 | int x, dhost, dimp, dlink, len, dnet; |
8a2f82db | 413 | int error = 0; |
6c73ade6 | 414 | |
a2cd4df7 | 415 | COUNT(IMPOUTPUT); |
6c73ade6 BJ |
416 | /* |
417 | * Don't even try if the IMP is unavailable. | |
418 | */ | |
8a2f82db SL |
419 | if (imp_softc[ifp->if_unit].imp_state != IMPS_UP) { |
420 | error = ENETDOWN; | |
a0b7c7fb | 421 | goto drop; |
8a2f82db | 422 | } |
6c73ade6 | 423 | |
ee787340 | 424 | switch (dst->sa_family) { |
6c73ade6 BJ |
425 | |
426 | #ifdef INET | |
ee787340 SL |
427 | case AF_INET: { |
428 | struct ip *ip = mtod(m0, struct ip *); | |
429 | struct sockaddr_in *sin = (struct sockaddr_in *)dst; | |
6c73ade6 | 430 | |
ee787340 SL |
431 | dhost = sin->sin_addr.s_host; |
432 | dimp = sin->sin_addr.s_impno; | |
6c73ade6 | 433 | dlink = IMPLINK_IP; |
1e63a6ab | 434 | dnet = 0; |
668cc26d | 435 | len = ntohs((u_short)ip->ip_len); |
6c73ade6 BJ |
436 | break; |
437 | } | |
438 | #endif | |
ee787340 | 439 | case AF_IMPLINK: |
6c73ade6 BJ |
440 | goto leaderexists; |
441 | ||
442 | default: | |
ee787340 SL |
443 | printf("imp%d: can't handle af%d\n", ifp->if_unit, |
444 | dst->sa_family); | |
8a2f82db | 445 | error = EAFNOSUPPORT; |
a0b7c7fb | 446 | goto drop; |
6c73ade6 BJ |
447 | } |
448 | ||
449 | /* | |
450 | * Add IMP leader. If there's not enough space in the | |
451 | * first mbuf, allocate another. If that should fail, we | |
452 | * drop this sucker. | |
453 | */ | |
454 | if (m->m_off > MMAXOFF || | |
455 | MMINOFF + sizeof(struct imp_leader) > m->m_off) { | |
456 | m = m_get(M_DONTWAIT); | |
8a2f82db SL |
457 | if (m == 0) { |
458 | error = ENOBUFS; | |
a0b7c7fb | 459 | goto drop; |
8a2f82db | 460 | } |
6c73ade6 BJ |
461 | m->m_next = m0; |
462 | m->m_off = MMINOFF; | |
463 | m->m_len = sizeof(struct imp_leader); | |
464 | } else { | |
465 | m->m_off -= sizeof(struct imp_leader); | |
466 | m->m_len += sizeof(struct imp_leader); | |
467 | } | |
468 | imp = mtod(m, struct imp_leader *); | |
469 | imp->il_format = IMP_NFF; | |
41e530c7 | 470 | imp->il_mtype = IMPTYPE_DATA; |
1e63a6ab | 471 | imp->il_network = dnet; |
6c73ade6 | 472 | imp->il_host = dhost; |
1e63a6ab | 473 | imp->il_imp = htons((u_short)dimp); |
668cc26d SL |
474 | imp->il_length = |
475 | htons((u_short)(len + sizeof(struct imp_leader)) << 3); | |
6c73ade6 | 476 | imp->il_link = dlink; |
41e530c7 | 477 | imp->il_flags = imp->il_htype = imp->il_subtype = 0; |
6c73ade6 BJ |
478 | |
479 | leaderexists: | |
6c73ade6 | 480 | return (impsnd(ifp, m)); |
a0b7c7fb SL |
481 | drop: |
482 | m_freem(m0); | |
8a2f82db | 483 | return (error); |
6c73ade6 BJ |
484 | } |
485 | ||
486 | /* | |
487 | * Put a message on an interface's output queue. | |
488 | * Perform RFNM counting: no more than 8 message may be | |
489 | * in flight to any one host. | |
490 | */ | |
491 | impsnd(ifp, m) | |
492 | struct ifnet *ifp; | |
493 | struct mbuf *m; | |
494 | { | |
495 | register struct imp_leader *ip; | |
496 | register struct host *hp; | |
497 | struct impcb *icp; | |
ba45553a | 498 | int s, error; |
6c73ade6 | 499 | |
a2cd4df7 | 500 | COUNT(IMPSND); |
6c73ade6 BJ |
501 | ip = mtod(m, struct imp_leader *); |
502 | ||
503 | /* | |
504 | * Do RFNM counting for data messages | |
505 | * (no more than 8 outstanding to any host) | |
506 | */ | |
ba45553a | 507 | s = splimp(); |
6c73ade6 BJ |
508 | if (ip->il_mtype == IMPTYPE_DATA) { |
509 | struct in_addr addr; | |
510 | ||
41e530c7 | 511 | #ifdef notdef |
a2cd4df7 | 512 | addr.s_net = ip->il_network; |
41e530c7 | 513 | #else |
ba45553a | 514 | addr.s_net = ifp->if_net; /* XXX */ |
41e530c7 | 515 | #endif |
6c73ade6 BJ |
516 | addr.s_host = ip->il_host; |
517 | addr.s_imp = ip->il_imp; | |
a2cd4df7 BJ |
518 | if ((hp = hostlookup(addr)) == 0) |
519 | hp = hostenter(addr); | |
ba45553a | 520 | if (hp && (hp->h_flags & (HF_DEAD|HF_UNREACH))) { |
67387c9c | 521 | error = hp->h_flags&HF_DEAD ? EHOSTDOWN : EHOSTUNREACH; |
ba45553a SL |
522 | hp->h_timer = HOSTTIMER; |
523 | hp->h_flags &= ~HF_INUSE; | |
524 | goto bad; | |
ba45553a | 525 | } |
6c73ade6 BJ |
526 | |
527 | /* | |
a0b7c7fb | 528 | * If IMP would block, queue until RFNM |
6c73ade6 BJ |
529 | */ |
530 | if (hp) { | |
6c73ade6 BJ |
531 | if (hp->h_rfnm < 8) { |
532 | hp->h_rfnm++; | |
533 | goto enque; | |
534 | } | |
fcd78660 BJ |
535 | if (hp->h_qcnt < 8) { /* high water mark */ |
536 | HOST_ENQUE(hp, m); | |
537 | goto start; | |
538 | } | |
6c73ade6 | 539 | } |
ba45553a SL |
540 | error = ENOBUFS; |
541 | goto bad; | |
6c73ade6 BJ |
542 | } |
543 | enque: | |
1e977657 BJ |
544 | if (IF_QFULL(&ifp->if_snd)) { |
545 | IF_DROP(&ifp->if_snd); | |
ba45553a SL |
546 | error = ENOBUFS; |
547 | bad: | |
1e977657 | 548 | m_freem(m); |
ba45553a SL |
549 | splx(s); |
550 | return (error); | |
1e977657 | 551 | } |
6c73ade6 | 552 | IF_ENQUEUE(&ifp->if_snd, m); |
6c73ade6 BJ |
553 | start: |
554 | icp = &imp_softc[ifp->if_unit].imp_cb; | |
555 | if (icp->ic_oactive == 0) | |
556 | (*icp->ic_start)(ifp->if_unit); | |
70e3101c | 557 | splx(s); |
8a2f82db | 558 | return (0); |
6c73ade6 BJ |
559 | } |
560 | ||
561 | /* | |
562 | * Put three 1822 NOOPs at the head of the output queue. | |
563 | * Part of host-IMP initialization procedure. | |
564 | * (Should return success/failure, but noone knows | |
565 | * what to do with this, so why bother?) | |
0dc78444 SL |
566 | * This routine is always called at splimp, so we don't |
567 | * protect the call to IF_PREPEND. | |
6c73ade6 BJ |
568 | */ |
569 | impnoops(sc) | |
570 | register struct imp_softc *sc; | |
571 | { | |
572 | register i; | |
573 | register struct mbuf *m; | |
a2cd4df7 | 574 | register struct control_leader *cp; |
6c73ade6 BJ |
575 | int x; |
576 | ||
a2cd4df7 | 577 | COUNT(IMPNOOPS); |
6c73ade6 | 578 | sc->imp_dropcnt = IMP_DROPCNT; |
a2cd4df7 | 579 | for (i = 0; i < IMP_DROPCNT + 1; i++ ) { |
6c73ade6 BJ |
580 | if ((m = m_getclr(M_DONTWAIT)) == 0) |
581 | return; | |
582 | m->m_off = MMINOFF; | |
a2cd4df7 BJ |
583 | m->m_len = sizeof(struct control_leader); |
584 | cp = mtod(m, struct control_leader *); | |
585 | cp->dl_format = IMP_NFF; | |
586 | cp->dl_link = i; | |
587 | cp->dl_mtype = IMPTYPE_NOOP; | |
6c73ade6 | 588 | IF_PREPEND(&sc->imp_if.if_snd, m); |
6c73ade6 BJ |
589 | } |
590 | if (sc->imp_cb.ic_oactive == 0) | |
591 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); | |
592 | } | |
7dfb87a5 SL |
593 | |
594 | #ifdef IMPLEADERS | |
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 | ntohs(ip->il_imp)); | |
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 | } | |
630 | #endif | |
41e530c7 | 631 | #endif |