Commit | Line | Data |
---|---|---|
34a8182d | 1 | /* if_il.c 4.4 82/05/27 */ |
f0d51478 BF |
2 | |
3 | #include "il.h" | |
4 | #include "imp.h" | |
5 | #include "loop.h" | |
6 | ||
7 | /* | |
8 | * Interlan Ethernet Communications Controller interface | |
9 | */ | |
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/ilreg.h" | |
21 | #include "../h/cpu.h" | |
22 | #include "../h/mtpr.h" | |
23 | #include "../h/vmmac.h" | |
24 | #include "../net/in.h" | |
25 | #include "../net/in_systm.h" | |
26 | #include "../net/if.h" | |
27 | #include "../net/if_il.h" | |
28 | #include "../net/if_uba.h" | |
29 | #include "../net/ip.h" | |
30 | #include "../net/ip_var.h" | |
31 | #include "../net/pup.h" | |
32 | #include "../net/route.h" | |
33 | #include <errno.h> | |
34 | ||
35 | #define ILMTU 1500 | |
36 | ||
37 | int ilprobe(), ilattach(), ilrint(), ilcint(); | |
38 | struct uba_device *ilinfo[NIL]; | |
39 | u_short ilstd[] = { 0 }; | |
40 | struct uba_driver ildriver = | |
41 | { ilprobe, 0, ilattach, 0, ilstd, "il", ilinfo }; | |
42 | u_char il_ectop[3] = { 0x02, 0x60, 0x8c }; | |
43 | #define ILUNIT(x) minor(x) | |
44 | ||
45 | int ilinit(),iloutput(),ilreset(); | |
46 | ||
47 | /* | |
48 | * Ethernet software status per interface. | |
49 | * | |
50 | * Each interface is referenced by a network interface structure, | |
51 | * is_if, which the routing code uses to locate the interface. | |
52 | * This structure contains the output queue for the interface, its address, ... | |
53 | * We also have, for each interface, a UBA interface structure, which | |
54 | * contains information about the UNIBUS resources held by the interface: | |
55 | * map registers, buffered data paths, etc. Information is cached in this | |
56 | * structure for use by the if_uba.c routines in running the interface | |
57 | * efficiently. | |
58 | */ | |
59 | struct il_softc { | |
60 | struct ifnet is_if; /* network-visible interface */ | |
61 | struct ifuba is_ifuba; /* UNIBUS resources */ | |
62 | short is_oactive; /* is output active? */ | |
63 | short is_startrcv; /* hang receive next chance */ | |
64 | u_char is_enaddr[6]; /* board's ethernet address */ | |
65 | } il_softc[NIL]; | |
66 | ||
67 | /* | |
68 | * Do an OFFLINE command. This will cause an interrupt for the | |
69 | * autoconfigure stuff. | |
70 | */ | |
71 | ilprobe(reg) | |
72 | caddr_t reg; | |
73 | { | |
74 | register int br, cvec; /* r11, r10 value-result */ | |
75 | register struct ildevice *addr = (struct ildevice *)reg; | |
76 | register i; | |
77 | ||
78 | COUNT(ILPROBE); | |
79 | #ifdef lint | |
80 | br = 0; cvec = br; br = cvec; | |
81 | ilrint(0); ilcint(0); | |
82 | #endif | |
83 | ||
84 | addr->il_csr = ILC_OFFLINE|IL_CIE; | |
85 | DELAY(100000); | |
86 | i = addr->il_csr; /* Clear CDONE */ | |
87 | if (cvec > 0 && cvec != 0x200) | |
88 | cvec -= 4; | |
89 | return (1); | |
90 | } | |
91 | ||
92 | struct il_stat ilbuf; | |
93 | /* | |
94 | * Interface exists: make available by filling in network interface | |
95 | * record. System will initialize the interface when it is ready | |
96 | * to accept packets. A STATUS command is done to get the ethernet | |
97 | * address and other interesting data. | |
98 | */ | |
99 | ilattach(ui) | |
100 | struct uba_device *ui; | |
101 | { | |
102 | register struct il_softc *is = &il_softc[ui->ui_unit]; | |
103 | register struct sockaddr_in *sin; | |
104 | register struct ildevice *addr = (struct ildevice *)ui->ui_addr; | |
105 | register int i; | |
106 | int s; | |
107 | int ubaddr; | |
108 | COUNT(ILATTACH); | |
109 | ||
110 | is->is_if.if_unit = ui->ui_unit; | |
111 | is->is_if.if_name = "il"; | |
112 | is->is_if.if_mtu = ILMTU; | |
113 | is->is_if.if_net = ui->ui_flags & 0xff; | |
114 | ||
115 | /* | |
116 | * Reset the board | |
117 | */ | |
118 | s = splimp(); | |
119 | addr->il_csr = ((ubaddr>>2)&0xc000)|ILC_RESET; | |
120 | while (!(addr->il_csr & IL_CDONE)) | |
121 | /* Busy wait */; | |
122 | if (addr->il_csr & IL_STATUS) | |
123 | printf("il%d: %s\n", ui->ui_unit, | |
124 | ildiag[addr->il_csr & IL_STATUS]); | |
125 | splx(s); | |
126 | ||
127 | /* | |
128 | * Map the status buffer to the Unibus, do the status command, | |
129 | * and unmap the buffer. | |
130 | */ | |
131 | ubaddr = uballoc(ui->ui_ubanum, &ilbuf, sizeof(ilbuf), 0); | |
132 | s = splimp(); | |
133 | addr->il_bar = ubaddr & 0xffff; | |
134 | addr->il_bcr = sizeof(ilbuf); | |
135 | addr->il_csr = ((ubaddr>>2)&0xc000)|ILC_STAT; | |
136 | while (!(addr->il_csr & IL_CDONE)) | |
137 | /* Busy wait */; | |
138 | if (addr->il_csr & IL_STATUS) | |
139 | printf("il%d: %s\n", ui->ui_unit, | |
140 | ilerrs[addr->il_csr & IL_STATUS]); | |
141 | splx(s); | |
142 | ubarelse(ui->ui_ubanum, &ubaddr); | |
143 | /* | |
144 | * Fill in the Ethernet address from the status buffer | |
145 | */ | |
146 | for (i=0; i<6; i++) | |
147 | is->is_enaddr[i] = ilbuf.ils_addr[i]; | |
148 | printf("il%d: addr=%x:%x:%x:%x:%x:%x module=%s firmware=%s\n", | |
149 | ui->ui_unit, | |
150 | is->is_enaddr[0]&0xff, is->is_enaddr[1]&0xff, | |
151 | is->is_enaddr[2]&0xff, is->is_enaddr[3]&0xff, | |
152 | is->is_enaddr[4]&0xff, is->is_enaddr[5]&0xff, | |
153 | ilbuf.ils_module, ilbuf.ils_firmware); | |
154 | is->is_if.if_host[0] = ((is->is_enaddr[3]&0xff)<<16) | 0x800000 | | |
155 | ((is->is_enaddr[4]&0xff)<<8) | (is->is_enaddr[5]&0xff); | |
156 | sin = (struct sockaddr_in *)&is->is_if.if_addr; | |
157 | sin->sin_family = AF_INET; | |
158 | sin->sin_addr = if_makeaddr(is->is_if.if_net, is->is_if.if_host[0]); | |
159 | ||
160 | sin = (struct sockaddr_in *)&is->is_if.if_broadaddr; | |
161 | sin->sin_family = AF_INET; | |
162 | sin->sin_addr = if_makeaddr(is->is_if.if_net, 0); | |
163 | is->is_if.if_flags = IFF_BROADCAST; | |
164 | ||
165 | is->is_if.if_init = ilinit; | |
166 | is->is_if.if_output = iloutput; | |
167 | is->is_if.if_ubareset = ilreset; | |
168 | is->is_ifuba.ifu_flags = UBA_CANTWAIT; | |
169 | if_attach(&is->is_if); | |
170 | #if NIMP == 0 | |
171 | if (ui->ui_flags &~ 0xff) | |
dc39362e | 172 | illhinit(&is->is_if, (ui->ui_flags &~ 0xff) | 0x0a); |
f0d51478 BF |
173 | #endif |
174 | } | |
175 | ||
176 | /* | |
177 | * Reset of interface after UNIBUS reset. | |
178 | * If interface is on specified uba, reset its state. | |
179 | */ | |
180 | ilreset(unit, uban) | |
181 | int unit, uban; | |
182 | { | |
183 | register struct uba_device *ui; | |
184 | COUNT(ILRESET); | |
185 | ||
186 | if (unit >= NIL || (ui = ilinfo[unit]) == 0 || ui->ui_alive == 0 || | |
187 | ui->ui_ubanum != uban) | |
188 | return; | |
189 | printf(" il%d", unit); | |
190 | ilinit(unit); | |
191 | } | |
192 | ||
193 | /* | |
194 | * Initialization of interface; clear recorded pending | |
195 | * operations, and reinitialize UNIBUS usage. | |
196 | */ | |
197 | ilinit(unit) | |
198 | int unit; | |
199 | { | |
200 | register struct il_softc *is = &il_softc[unit]; | |
201 | register struct uba_device *ui = ilinfo[unit]; | |
202 | register struct ildevice *addr; | |
203 | register i; | |
204 | int s; | |
205 | ||
206 | if (if_ubainit(&is->is_ifuba, ui->ui_ubanum, | |
207 | sizeof (struct il_rheader), (int)btoc(ILMTU)) == 0) { | |
208 | printf("il%d: can't initialize\n", unit); | |
209 | is->is_if.if_flags &= ~IFF_UP; | |
210 | return; | |
211 | } | |
212 | addr = (struct ildevice *)ui->ui_addr; | |
213 | ||
214 | /* | |
215 | * Set board online. | |
216 | * Hang receive buffer and start any pending | |
217 | * writes by faking a transmit complete. | |
218 | * Receive bcr is not a muliple of 4 so buffer | |
219 | * chaining can't happen. | |
220 | */ | |
221 | s = splimp(); | |
222 | addr->il_csr = ILC_ONLINE; | |
223 | while (!(addr->il_csr & IL_CDONE)) | |
224 | /* Busy wait */; | |
225 | addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; | |
226 | addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; | |
227 | addr->il_csr = ((is->is_ifuba.ifu_r.ifrw_info>>2)&0xc000)| | |
228 | ILC_RCV|IL_RIE; | |
229 | while (!(addr->il_csr & IL_CDONE)) | |
230 | /* Busy wait */; | |
231 | is->is_startrcv = 0; | |
232 | is->is_oactive = 1; | |
233 | is->is_if.if_flags |= IFF_UP; | |
234 | ilcint(unit); | |
235 | splx(s); | |
236 | if_rtinit(&is->is_if, RTF_DIRECT|RTF_UP); | |
237 | } | |
238 | ||
239 | /* | |
240 | * Start output on interface. | |
241 | * Get another datagram to send off of the interface queue, | |
242 | * and map it to the interface before starting the output. | |
243 | */ | |
244 | ilstart(dev) | |
245 | dev_t dev; | |
246 | { | |
247 | int unit = ILUNIT(dev); | |
248 | struct uba_device *ui = ilinfo[unit]; | |
249 | register struct il_softc *is = &il_softc[unit]; | |
250 | register struct ildevice *addr; | |
251 | register len; | |
252 | struct mbuf *m; | |
253 | int dest; | |
254 | COUNT(ILSTART); | |
255 | ||
256 | /* | |
257 | * Dequeue another request and copy it into the buffer. | |
258 | * If no more requests, just return. | |
259 | */ | |
260 | IF_DEQUEUE(&is->is_if.if_snd, m); | |
261 | if (m == 0) | |
262 | return; | |
263 | len = if_wubaput(&is->is_ifuba, m); | |
264 | ||
265 | /* | |
266 | * Flush BDP, then start the output. | |
267 | */ | |
268 | if (is->is_ifuba.ifu_flags & UBA_NEEDBDP) | |
269 | UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_w.ifrw_bdp); | |
270 | addr = (struct ildevice *)ui->ui_addr; | |
271 | addr->il_bar = is->is_ifuba.ifu_w.ifrw_info & 0xffff; | |
272 | addr->il_bcr = len; | |
273 | addr->il_csr = ((is->is_ifuba.ifu_w.ifrw_info>>2)&0xc000)| | |
274 | ILC_XMIT|IL_CIE|IL_RIE; | |
275 | is->is_oactive = 1; | |
276 | } | |
277 | ||
278 | /* | |
279 | * Command done interrupt. | |
280 | * This should only happen after a transmit command, | |
281 | * so it is equivalent to a transmit interrupt. | |
282 | * Start another output if more data to send. | |
283 | */ | |
284 | ilcint(unit) | |
285 | int unit; | |
286 | { | |
287 | register struct uba_device *ui = ilinfo[unit]; | |
288 | register struct il_softc *is = &il_softc[unit]; | |
289 | register struct ildevice *addr = (struct ildevice *)ui->ui_addr; | |
290 | register int err; | |
291 | COUNT(ILCINT); | |
292 | ||
293 | if (is->is_oactive == 0) { | |
294 | printf("il%d: strange xmit interrupt!\n", unit); | |
295 | return; | |
296 | } | |
297 | is->is_if.if_opackets++; | |
298 | is->is_oactive = 0; | |
299 | if (err = (addr->il_csr & IL_STATUS)){ | |
300 | is->is_if.if_oerrors++; | |
301 | printf("il%d: output error %d\n", unit, err); | |
302 | } | |
303 | /* | |
304 | * Hang receive buffer if it couldn't be done earlier (in ilrint). | |
305 | */ | |
306 | if (is->is_startrcv) { | |
307 | addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; | |
308 | addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; | |
309 | addr->il_csr = ((is->is_ifuba.ifu_r.ifrw_info>>2)&0xc000)| | |
310 | ILC_RCV|IL_RIE; | |
311 | while (!(addr->il_csr & IL_CDONE)) | |
312 | /* Busy wait */; | |
313 | is->is_startrcv = 0; | |
314 | } | |
315 | if (is->is_ifuba.ifu_xtofree) { | |
316 | m_freem(is->is_ifuba.ifu_xtofree); | |
317 | is->is_ifuba.ifu_xtofree = 0; | |
318 | } | |
319 | if (is->is_if.if_snd.ifq_head == 0) { | |
320 | return; | |
321 | } | |
322 | ilstart(unit); | |
323 | } | |
324 | ||
325 | /* | |
326 | * Ethernet interface receiver interrupt. | |
327 | * If input error just drop packet. | |
328 | * Otherwise purge input buffered data path and examine | |
329 | * packet to determine type. If can't determine length | |
330 | * from type, then have to drop packet. Othewise decapsulate | |
331 | * packet based on type and pass to type specific higher-level | |
332 | * input routine. | |
333 | */ | |
334 | ilrint(unit) | |
335 | int unit; | |
336 | { | |
337 | register struct il_softc *is = &il_softc[unit]; | |
338 | struct ildevice *addr = (struct ildevice *)ilinfo[unit]->ui_addr; | |
339 | register struct il_rheader *il; | |
340 | struct mbuf *m; | |
341 | int len, off, resid; | |
342 | register struct ifqueue *inq; | |
343 | ||
344 | COUNT(ILRINT); | |
345 | is->is_if.if_ipackets++; | |
346 | if (is->is_ifuba.ifu_flags & UBA_NEEDBDP) | |
347 | UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_r.ifrw_bdp); | |
348 | il = (struct il_rheader *)(is->is_ifuba.ifu_r.ifrw_addr); | |
349 | len = il->ilr_length - sizeof(struct il_rheader); | |
350 | if (il->ilr_status&0x3 || len < 46 || len > ILMTU) { | |
351 | is->is_if.if_ierrors++; | |
352 | #ifdef notdef | |
353 | if (is->is_if.if_ierrors % 100 == 0) | |
354 | printf("il%d: += 100 input errors\n", unit); | |
355 | #endif | |
356 | printf("il%d: input error (status=%x, len=%d)\n", unit, | |
357 | il->ilr_status, len); | |
358 | goto setup; | |
359 | } | |
360 | ||
361 | /* | |
362 | * Deal with trailer protocol: if type is PUP trailer | |
363 | * get true type from first 16-bit word past data. | |
364 | * Remember that type was trailer by setting off. | |
365 | */ | |
366 | #define ildataaddr(il, off, type) ((type)(((caddr_t)((il)+1)+(off)))) | |
367 | if (il->ilr_type >= ILPUP_TRAIL && | |
368 | il->ilr_type < ILPUP_TRAIL+ILPUP_NTRAILER) { | |
369 | off = (il->ilr_type - ILPUP_TRAIL) * 512; | |
370 | if (off >= ILMTU) | |
371 | goto setup; /* sanity */ | |
372 | il->ilr_type = *ildataaddr(il, off, u_short *); | |
373 | resid = *(ildataaddr(il, off+2, u_short *)); | |
374 | if (off + resid > len) | |
375 | goto setup; /* sanity */ | |
376 | len = off + resid; | |
377 | } else | |
378 | off = 0; | |
379 | if (len == 0) | |
380 | goto setup; | |
381 | ||
382 | /* | |
383 | * Pull packet off interface. Off is nonzero if packet | |
384 | * has trailing header; ilget will then force this header | |
385 | * information to be at the front, but we still have to drop | |
386 | * the type and length which are at the front of any trailer data. | |
387 | */ | |
388 | m = if_rubaget(&is->is_ifuba, len, off); | |
389 | if (m == 0) | |
390 | goto setup; | |
391 | if (off) { | |
392 | m->m_off += 2 * sizeof (u_short); | |
393 | m->m_len -= 2 * sizeof (u_short); | |
394 | } | |
395 | switch (il->ilr_type) { | |
396 | ||
397 | #ifdef INET | |
398 | case ILPUP_IPTYPE: | |
399 | schednetisr(NETISR_IP); | |
400 | inq = &ipintrq; | |
401 | break; | |
402 | #endif | |
403 | default: | |
404 | m_freem(m); | |
405 | goto setup; | |
406 | } | |
407 | ||
408 | if (IF_QFULL(inq)) { | |
409 | IF_DROP(inq); | |
410 | m_freem(m); | |
411 | } else | |
412 | IF_ENQUEUE(inq, m); | |
413 | ||
414 | setup: | |
415 | /* | |
416 | * Reset for next packet if possible. | |
417 | * If waiting for transmit command completion, set flag | |
418 | * and wait until command completes. | |
419 | */ | |
420 | if (!is->is_oactive) { | |
421 | addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; | |
422 | addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; | |
423 | addr->il_csr = ((is->is_ifuba.ifu_r.ifrw_info>>2)&0xc000)| | |
424 | ILC_RCV|IL_RIE; | |
425 | while (!(addr->il_csr & IL_CDONE)) | |
426 | /* Busy wait */; | |
427 | } else | |
428 | is->is_startrcv = 1; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Ethernet output routine. | |
433 | * Encapsulate a packet of type family for the local net. | |
434 | * Use trailer local net encapsulation if enough data in first | |
435 | * packet leaves a multiple of 512 bytes of data in remainder. | |
436 | */ | |
437 | iloutput(ifp, m0, dst) | |
438 | struct ifnet *ifp; | |
439 | struct mbuf *m0; | |
440 | struct sockaddr *dst; | |
441 | { | |
442 | int type, dest, s, error; | |
443 | register struct il_softc *is = &il_softc[ifp->if_unit]; | |
444 | register struct mbuf *m = m0; | |
445 | register struct il_xheader *il; | |
446 | register int off; | |
447 | register int i; | |
448 | ||
449 | COUNT(ILOUTPUT); | |
450 | switch (dst->sa_family) { | |
451 | ||
452 | #ifdef INET | |
453 | case AF_INET: | |
454 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; | |
455 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; | |
456 | if (off > 0 && (off & 0x1ff) == 0 && | |
457 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { | |
458 | type = ILPUP_TRAIL + (off>>9); | |
459 | m->m_off -= 2 * sizeof (u_short); | |
460 | m->m_len += 2 * sizeof (u_short); | |
461 | *mtod(m, u_short *) = ILPUP_IPTYPE; | |
462 | *(mtod(m, u_short *) + 1) = m->m_len; | |
463 | goto gottrailertype; | |
464 | } | |
465 | type = ILPUP_IPTYPE; | |
466 | off = 0; | |
467 | goto gottype; | |
468 | #endif | |
469 | ||
470 | default: | |
471 | printf("il%d: can't handle af%d\n", ifp->if_unit, | |
472 | dst->sa_family); | |
473 | error = EAFNOSUPPORT; | |
474 | goto bad; | |
475 | } | |
476 | ||
477 | gottrailertype: | |
478 | /* | |
479 | * Packet to be sent as trailer: move first packet | |
480 | * (control information) to end of chain. | |
481 | */ | |
482 | while (m->m_next) | |
483 | m = m->m_next; | |
484 | m->m_next = m0; | |
485 | m = m0->m_next; | |
486 | m0->m_next = 0; | |
487 | m0 = m; | |
488 | ||
489 | gottype: | |
490 | /* | |
491 | * Add local net header. If no space in first mbuf, | |
492 | * allocate another. | |
493 | */ | |
494 | if (m->m_off > MMAXOFF || | |
495 | MMINOFF + sizeof (struct il_xheader) > m->m_off) { | |
496 | m = m_get(M_DONTWAIT); | |
497 | if (m == 0) { | |
498 | error = ENOBUFS; | |
499 | goto bad; | |
500 | } | |
501 | m->m_next = m0; | |
502 | m->m_off = MMINOFF; | |
503 | m->m_len = sizeof (struct il_xheader); | |
504 | } else { | |
505 | m->m_off -= sizeof (struct il_xheader); | |
506 | m->m_len += sizeof (struct il_xheader); | |
507 | } | |
508 | il = mtod(m, struct il_xheader *); | |
509 | if ((dest &~ 0xff) == 0) | |
510 | for (i=0; i<6; i++) | |
511 | il->ilx_dhost[i] = 0xff; | |
512 | else { | |
513 | if (dest & 0x8000) { | |
514 | il->ilx_dhost[0] = is->is_enaddr[0]; | |
515 | il->ilx_dhost[1] = is->is_enaddr[1]; | |
516 | il->ilx_dhost[2] = is->is_enaddr[2]; | |
517 | } else { | |
518 | il->ilx_dhost[0] = il_ectop[0]; | |
519 | il->ilx_dhost[1] = il_ectop[1]; | |
520 | il->ilx_dhost[2] = il_ectop[2]; | |
521 | } | |
522 | il->ilx_dhost[3] = (dest>>8) & 0x7f; | |
523 | il->ilx_dhost[4] = (dest>>16) & 0xff; | |
524 | il->ilx_dhost[5] = (dest>>24) & 0xff; | |
525 | } | |
526 | il->ilx_type = type; | |
527 | ||
528 | /* | |
529 | * Queue message on interface, and start output if interface | |
530 | * not yet active. | |
531 | */ | |
532 | s = splimp(); | |
533 | if (IF_QFULL(&ifp->if_snd)) { | |
534 | IF_DROP(&ifp->if_snd); | |
535 | error = ENOBUFS; | |
536 | goto qfull; | |
537 | } | |
538 | IF_ENQUEUE(&ifp->if_snd, m); | |
539 | if (is->is_oactive == 0) | |
540 | ilstart(ifp->if_unit); | |
541 | splx(s); | |
542 | return (0); | |
543 | qfull: | |
544 | m0 = m; | |
545 | splx(s); | |
546 | bad: | |
547 | m_freem(m0); | |
548 | return(error); | |
549 | } | |
550 | ||
551 | #if NIMP == 0 && NIL > 0 | |
552 | /* | |
553 | * Logical host interface driver. | |
554 | * Allows host to appear as an ARPAnet | |
555 | * logical host. Must also have routing | |
556 | * table entry set up to forward packets | |
557 | * to appropriate gateway on localnet. | |
558 | */ | |
559 | ||
560 | struct ifnet illhif; | |
dc39362e | 561 | int looutput(); |
f0d51478 BF |
562 | |
563 | /* | |
564 | * Called by localnet interface to allow logical | |
565 | * host interface to "attach". Nothing should ever | |
566 | * be sent locally to this interface, it's purpose | |
567 | * is simply to establish the host's arpanet address. | |
568 | */ | |
dc39362e BJ |
569 | illhinit(ilifp, addr) |
570 | struct ifnet *ilifp; | |
f0d51478 BF |
571 | int addr; |
572 | { | |
573 | register struct ifnet *ifp = &illhif; | |
574 | register struct sockaddr_in *sin; | |
575 | ||
576 | COUNT(ILLHINIT); | |
577 | ifp->if_name = "lh"; | |
578 | ifp->if_mtu = ILMTU; | |
579 | sin = (struct sockaddr_in *)&ifp->if_addr; | |
580 | sin->sin_family = AF_INET; | |
581 | sin->sin_addr.s_addr = addr; | |
34a8182d | 582 | sin->sin_addr.s_lh = ilifp->if_host[0]; |
f0d51478 | 583 | ifp->if_net = sin->sin_addr.s_net; |
34a8182d | 584 | ifp->if_dstaddr = ifp->if_addr; |
dc39362e BJ |
585 | ifp->if_flags = IFF_UP|IFF_POINTOPOINT; |
586 | ifp->if_output = looutput; | |
f0d51478 | 587 | if_attach(ifp); |
c46ba114 | 588 | rtinit(&ifp->if_addr, &ifp->if_addr, RTF_UP|RTF_DIRECT|RTF_HOST); |
f0d51478 BF |
589 | } |
590 | #endif |