Commit | Line | Data |
---|---|---|
4e818526 | 1 | /* if_en.c 4.52 82/04/07 */ |
11720282 BJ |
2 | |
3 | #include "en.h" | |
a9f3e174 | 4 | #include "imp.h" |
f1b2fa5b | 5 | |
11720282 | 6 | /* |
f1b2fa5b | 7 | * Xerox prototype (3 Mb) Ethernet interface driver. |
11720282 BJ |
8 | */ |
9 | ||
10 | #include "../h/param.h" | |
11 | #include "../h/systm.h" | |
12 | #include "../h/mbuf.h" | |
11720282 BJ |
13 | #include "../h/pte.h" |
14 | #include "../h/buf.h" | |
8a13b737 BJ |
15 | #include "../h/protosw.h" |
16 | #include "../h/socket.h" | |
11720282 BJ |
17 | #include "../h/ubareg.h" |
18 | #include "../h/ubavar.h" | |
11720282 | 19 | #include "../h/enreg.h" |
11720282 | 20 | #include "../h/cpu.h" |
8a13b737 BJ |
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" | |
26 | #include "../net/if_en.h" | |
27 | #include "../net/if_uba.h" | |
28 | #include "../net/ip.h" | |
29 | #include "../net/ip_var.h" | |
31c2345c | 30 | #include "../net/pup.h" |
f6311fb6 | 31 | #include "../net/route.h" |
8a13b737 | 32 | |
a453e1b5 | 33 | #define ENMTU (1024+512) |
11720282 | 34 | |
11720282 BJ |
35 | int enprobe(), enattach(), enrint(), enxint(), encollide(); |
36 | struct uba_device *eninfo[NEN]; | |
37 | u_short enstd[] = { 0 }; | |
38 | struct uba_driver endriver = | |
b454c3ea | 39 | { enprobe, 0, enattach, 0, enstd, "en", eninfo }; |
11720282 BJ |
40 | #define ENUNIT(x) minor(x) |
41 | ||
f1b2fa5b BJ |
42 | int eninit(),enoutput(),enreset(); |
43 | ||
44 | /* | |
45 | * Ethernet software status per interface. | |
46 | * | |
47 | * Each interface is referenced by a network interface structure, | |
48 | * es_if, which the routing code uses to locate the interface. | |
49 | * This structure contains the output queue for the interface, its address, ... | |
50 | * We also have, for each interface, a UBA interface structure, which | |
51 | * contains information about the UNIBUS resources held by the interface: | |
52 | * map registers, buffered data paths, etc. Information is cached in this | |
53 | * structure for use by the if_uba.c routines in running the interface | |
54 | * efficiently. | |
55 | */ | |
8a13b737 | 56 | struct en_softc { |
f1b2fa5b BJ |
57 | struct ifnet es_if; /* network-visible interface */ |
58 | struct ifuba es_ifuba; /* UNIBUS resources */ | |
59 | short es_delay; /* current output delay */ | |
60 | short es_mask; /* mask for current output delay */ | |
0658a645 | 61 | short es_lastx; /* host last transmitted to */ |
f1b2fa5b BJ |
62 | short es_oactive; /* is output active? */ |
63 | short es_olen; /* length of last output */ | |
8a13b737 | 64 | } en_softc[NEN]; |
11720282 | 65 | |
f1b2fa5b BJ |
66 | /* |
67 | * Do output DMA to determine interface presence and | |
68 | * interrupt vector. DMA is too short to disturb other hosts. | |
69 | */ | |
11720282 BJ |
70 | enprobe(reg) |
71 | caddr_t reg; | |
72 | { | |
b454c3ea | 73 | register int br, cvec; /* r11, r10 value-result */ |
11720282 BJ |
74 | register struct endevice *addr = (struct endevice *)reg; |
75 | ||
8a13b737 | 76 | COUNT(ENPROBE); |
11720282 BJ |
77 | #ifdef lint |
78 | br = 0; cvec = br; br = cvec; | |
2b4b57cd | 79 | enrint(0); enxint(0); encollide(0); |
11720282 | 80 | #endif |
11720282 | 81 | addr->en_istat = 0; |
11720282 BJ |
82 | addr->en_owc = -1; |
83 | addr->en_oba = 0; | |
941ee7ef | 84 | addr->en_ostat = EN_IEN|EN_GO; |
11720282 BJ |
85 | DELAY(100000); |
86 | addr->en_ostat = 0; | |
11720282 BJ |
87 | return (1); |
88 | } | |
89 | ||
f1b2fa5b BJ |
90 | /* |
91 | * Interface exists: make available by filling in network interface | |
92 | * record. System will initialize the interface when it is ready | |
93 | * to accept packets. | |
94 | */ | |
11720282 BJ |
95 | enattach(ui) |
96 | struct uba_device *ui; | |
97 | { | |
f1b2fa5b | 98 | register struct en_softc *es = &en_softc[ui->ui_unit]; |
ee787340 | 99 | register struct sockaddr_in *sin; |
8a13b737 | 100 | COUNT(ENATTACH); |
f1b2fa5b BJ |
101 | |
102 | es->es_if.if_unit = ui->ui_unit; | |
b454c3ea | 103 | es->es_if.if_name = "en"; |
f1b2fa5b | 104 | es->es_if.if_mtu = ENMTU; |
e3631d06 | 105 | es->es_if.if_net = ui->ui_flags & 0xff; |
f1b2fa5b | 106 | es->es_if.if_host[0] = |
ee787340 SL |
107 | (~(((struct endevice *)eninfo[ui->ui_unit]->ui_addr)->en_addr)) & 0xff; |
108 | sin = (struct sockaddr_in *)&es->es_if.if_addr; | |
109 | sin->sin_family = AF_INET; | |
110 | sin->sin_addr = if_makeaddr(es->es_if.if_net, es->es_if.if_host[0]); | |
111 | sin = (struct sockaddr_in *)&es->es_if.if_broadaddr; | |
112 | sin->sin_family = AF_INET; | |
113 | sin->sin_addr = if_makeaddr(es->es_if.if_net, 0); | |
114 | es->es_if.if_flags = IFF_BROADCAST; | |
f1b2fa5b | 115 | es->es_if.if_init = eninit; |
b454c3ea | 116 | es->es_if.if_output = enoutput; |
f1b2fa5b | 117 | es->es_if.if_ubareset = enreset; |
7a66118b | 118 | es->es_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16; |
405c9168 | 119 | if_attach(&es->es_if); |
a9f3e174 SL |
120 | #if NIMP == 0 |
121 | /* here's one for you john baby.... */ | |
cd66a61f | 122 | enlhinit((ui->ui_flags &~ 0xff) | 0x0a); |
a9f3e174 | 123 | #endif |
11720282 BJ |
124 | } |
125 | ||
f1b2fa5b BJ |
126 | /* |
127 | * Reset of interface after UNIBUS reset. | |
128 | * If interface is on specified uba, reset its state. | |
129 | */ | |
130 | enreset(unit, uban) | |
131 | int unit, uban; | |
8a13b737 | 132 | { |
11720282 | 133 | register struct uba_device *ui; |
f1b2fa5b | 134 | COUNT(ENRESET); |
11720282 | 135 | |
b454c3ea BJ |
136 | if (unit >= NEN || (ui = eninfo[unit]) == 0 || ui->ui_alive == 0 || |
137 | ui->ui_ubanum != uban) | |
f1b2fa5b | 138 | return; |
b454c3ea | 139 | printf(" en%d", unit); |
f1b2fa5b BJ |
140 | eninit(unit); |
141 | } | |
142 | ||
143 | /* | |
144 | * Initialization of interface; clear recorded pending | |
145 | * operations, and reinitialize UNIBUS usage. | |
146 | */ | |
147 | eninit(unit) | |
148 | int unit; | |
149 | { | |
b454c3ea BJ |
150 | register struct en_softc *es = &en_softc[unit]; |
151 | register struct uba_device *ui = eninfo[unit]; | |
f1b2fa5b | 152 | register struct endevice *addr; |
f1b2fa5b BJ |
153 | int s; |
154 | ||
f1b2fa5b | 155 | if (if_ubainit(&es->es_ifuba, ui->ui_ubanum, |
81950b45 | 156 | sizeof (struct en_header), (int)btoc(ENMTU)) == 0) { |
b454c3ea | 157 | printf("en%d: can't initialize\n", unit); |
ee787340 | 158 | es->es_if.if_flags &= ~IFF_UP; |
8a13b737 | 159 | return; |
11720282 | 160 | } |
11720282 | 161 | addr = (struct endevice *)ui->ui_addr; |
8a13b737 | 162 | addr->en_istat = addr->en_ostat = 0; |
11720282 | 163 | |
f1b2fa5b | 164 | /* |
b454c3ea BJ |
165 | * Hang a receive and start any |
166 | * pending writes by faking a transmit complete. | |
f1b2fa5b BJ |
167 | */ |
168 | s = splimp(); | |
b454c3ea BJ |
169 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; |
170 | addr->en_iwc = -(sizeof (struct en_header) + ENMTU) >> 1; | |
171 | addr->en_istat = EN_IEN|EN_GO; | |
172 | es->es_oactive = 1; | |
ee787340 | 173 | es->es_if.if_flags |= IFF_UP; |
f1b2fa5b BJ |
174 | enxint(unit); |
175 | splx(s); | |
f6311fb6 | 176 | if_rtinit(&es->es_if, RTF_DIRECT|RTF_UP); |
11720282 BJ |
177 | } |
178 | ||
0658a645 | 179 | int enalldelay = 0; |
3552a746 | 180 | int enlastdel = 25; |
0658a645 | 181 | int enlastmask = (~0) << 5; |
8a13b737 | 182 | |
f1b2fa5b BJ |
183 | /* |
184 | * Start or restart output on interface. | |
185 | * If interface is already active, then this is a retransmit | |
186 | * after a collision, and just restuff registers and delay. | |
187 | * If interface is not already active, get another datagram | |
188 | * to send off of the interface queue, and map it to the interface | |
189 | * before starting the output. | |
190 | */ | |
ae348eea | 191 | enstart(dev) |
11720282 BJ |
192 | dev_t dev; |
193 | { | |
b454c3ea BJ |
194 | int unit = ENUNIT(dev); |
195 | struct uba_device *ui = eninfo[unit]; | |
196 | register struct en_softc *es = &en_softc[unit]; | |
8a13b737 | 197 | register struct endevice *addr; |
8a13b737 BJ |
198 | struct mbuf *m; |
199 | int dest; | |
ae348eea | 200 | COUNT(ENSTART); |
11720282 | 201 | |
8a13b737 BJ |
202 | if (es->es_oactive) |
203 | goto restart; | |
f1b2fa5b BJ |
204 | |
205 | /* | |
206 | * Not already active: dequeue another request | |
207 | * and map it to the UNIBUS. If no more requests, | |
208 | * just return. | |
209 | */ | |
210 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
8a13b737 BJ |
211 | if (m == 0) { |
212 | es->es_oactive = 0; | |
11720282 BJ |
213 | return; |
214 | } | |
a453e1b5 | 215 | dest = mtod(m, struct en_header *)->en_dhost; |
8a13b737 | 216 | es->es_olen = if_wubaput(&es->es_ifuba, m); |
f1b2fa5b BJ |
217 | |
218 | /* | |
219 | * Ethernet cannot take back-to-back packets (no | |
0658a645 BJ |
220 | * buffering in interface. To help avoid overrunning |
221 | * receivers, enforce a small delay (about 1ms) in interface: | |
222 | * * between all packets when enalldelay | |
223 | * * whenever last packet was broadcast | |
224 | * * whenever this packet is to same host as last packet | |
f1b2fa5b | 225 | */ |
0658a645 | 226 | if (enalldelay || es->es_lastx == 0 || es->es_lastx == dest) { |
8a13b737 | 227 | es->es_delay = enlastdel; |
0658a645 BJ |
228 | es->es_mask = enlastmask; |
229 | } | |
230 | es->es_lastx = dest; | |
f1b2fa5b | 231 | |
8a13b737 | 232 | restart: |
f1b2fa5b BJ |
233 | /* |
234 | * Have request mapped to UNIBUS for transmission. | |
235 | * Purge any stale data from this BDP, and start the otput. | |
236 | */ | |
ee787340 SL |
237 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
238 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_w.ifrw_bdp); | |
11720282 | 239 | addr = (struct endevice *)ui->ui_addr; |
405c9168 | 240 | addr->en_oba = (int)es->es_ifuba.ifu_w.ifrw_info; |
8a13b737 BJ |
241 | addr->en_odelay = es->es_delay; |
242 | addr->en_owc = -((es->es_olen + 1) >> 1); | |
941ee7ef | 243 | addr->en_ostat = EN_IEN|EN_GO; |
8a13b737 | 244 | es->es_oactive = 1; |
11720282 BJ |
245 | } |
246 | ||
f1b2fa5b BJ |
247 | /* |
248 | * Ethernet interface transmitter interrupt. | |
249 | * Start another output if more data to send. | |
250 | */ | |
11720282 BJ |
251 | enxint(unit) |
252 | int unit; | |
253 | { | |
b454c3ea BJ |
254 | register struct uba_device *ui = eninfo[unit]; |
255 | register struct en_softc *es = &en_softc[unit]; | |
519a1ecf | 256 | register struct endevice *addr = (struct endevice *)ui->ui_addr; |
11720282 BJ |
257 | COUNT(ENXINT); |
258 | ||
8a13b737 BJ |
259 | if (es->es_oactive == 0) |
260 | return; | |
519a1ecf | 261 | if (es->es_mask && (addr->en_ostat&EN_OERROR)) { |
89413846 | 262 | es->es_if.if_oerrors++; |
4020bf24 BJ |
263 | if (es->es_if.if_oerrors % 100 == 0) |
264 | printf("en%d: += 100 output errors\n", unit); | |
519a1ecf BJ |
265 | endocoll(unit); |
266 | return; | |
89413846 | 267 | } |
519a1ecf BJ |
268 | es->es_if.if_opackets++; |
269 | es->es_oactive = 0; | |
270 | es->es_delay = 0; | |
271 | es->es_mask = ~0; | |
7a66118b BJ |
272 | if (es->es_ifuba.ifu_xtofree) { |
273 | m_freem(es->es_ifuba.ifu_xtofree); | |
274 | es->es_ifuba.ifu_xtofree = 0; | |
275 | } | |
f1b2fa5b | 276 | if (es->es_if.if_snd.ifq_head == 0) { |
0658a645 | 277 | es->es_lastx = 256; /* putatively illegal */ |
11720282 BJ |
278 | return; |
279 | } | |
8a13b737 | 280 | enstart(unit); |
11720282 BJ |
281 | } |
282 | ||
f1b2fa5b BJ |
283 | /* |
284 | * Collision on ethernet interface. Do exponential | |
285 | * backoff, and retransmit. If have backed off all | |
ee787340 | 286 | * the way print warning diagnostic, and drop packet. |
f1b2fa5b | 287 | */ |
11720282 BJ |
288 | encollide(unit) |
289 | int unit; | |
290 | { | |
519a1ecf | 291 | struct en_softc *es = &en_softc[unit]; |
11720282 BJ |
292 | COUNT(ENCOLLIDE); |
293 | ||
f1b2fa5b | 294 | es->es_if.if_collisions++; |
8a13b737 | 295 | if (es->es_oactive == 0) |
11720282 | 296 | return; |
519a1ecf BJ |
297 | endocoll(unit); |
298 | } | |
299 | ||
300 | endocoll(unit) | |
301 | int unit; | |
302 | { | |
303 | register struct en_softc *es = &en_softc[unit]; | |
304 | ||
b454c3ea BJ |
305 | /* |
306 | * Es_mask is a 16 bit number with n low zero bits, with | |
307 | * n the number of backoffs. When es_mask is 0 we have | |
308 | * backed off 16 times, and give up. | |
309 | */ | |
8a13b737 | 310 | if (es->es_mask == 0) { |
a453e1b5 | 311 | printf("en%d: send error\n", unit); |
8a13b737 | 312 | enxint(unit); |
b454c3ea | 313 | return; |
11720282 | 314 | } |
b454c3ea BJ |
315 | /* |
316 | * Another backoff. Restart with delay based on n low bits | |
317 | * of the interval timer. | |
318 | */ | |
319 | es->es_mask <<= 1; | |
320 | es->es_delay = mfpr(ICR) &~ es->es_mask; | |
321 | enstart(unit); | |
11720282 BJ |
322 | } |
323 | ||
31c2345c SL |
324 | struct sockaddr_pup pupsrc = { AF_PUP }; |
325 | struct sockaddr_pup pupdst = { AF_PUP }; | |
326 | struct sockproto pupproto = { PF_PUP }; | |
f1b2fa5b BJ |
327 | /* |
328 | * Ethernet interface receiver interrupt. | |
329 | * If input error just drop packet. | |
330 | * Otherwise purge input buffered data path and examine | |
331 | * packet to determine type. If can't determine length | |
332 | * from type, then have to drop packet. Othewise decapsulate | |
333 | * packet based on type and pass to type specific higher-level | |
334 | * input routine. | |
335 | */ | |
11720282 BJ |
336 | enrint(unit) |
337 | int unit; | |
338 | { | |
b454c3ea BJ |
339 | register struct en_softc *es = &en_softc[unit]; |
340 | struct endevice *addr = (struct endevice *)eninfo[unit]->ui_addr; | |
341 | register struct en_header *en; | |
8a13b737 | 342 | struct mbuf *m; |
0658a645 | 343 | int len, plen; short resid; |
b454c3ea | 344 | register struct ifqueue *inq; |
8a13b737 | 345 | int off; |
11720282 BJ |
346 | COUNT(ENRINT); |
347 | ||
b454c3ea | 348 | es->es_if.if_ipackets++; |
f1b2fa5b BJ |
349 | |
350 | /* | |
b454c3ea | 351 | * Purge BDP; drop if input error indicated. |
f1b2fa5b | 352 | */ |
ee787340 SL |
353 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
354 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_r.ifrw_bdp); | |
941ee7ef | 355 | if (addr->en_istat&EN_IERROR) { |
f1b2fa5b | 356 | es->es_if.if_ierrors++; |
4020bf24 BJ |
357 | if (es->es_if.if_ierrors % 100 == 0) |
358 | printf("en%d: += 100 input errors\n", unit); | |
8a13b737 | 359 | goto setup; |
11720282 | 360 | } |
f1b2fa5b BJ |
361 | |
362 | /* | |
0658a645 | 363 | * Calculate input data length. |
f1b2fa5b BJ |
364 | * Get pointer to ethernet header (in input buffer). |
365 | * Deal with trailer protocol: if type is PUP trailer | |
366 | * get true type from first 16-bit word past data. | |
367 | * Remember that type was trailer by setting off. | |
368 | */ | |
0658a645 BJ |
369 | resid = addr->en_iwc; |
370 | if (resid) | |
371 | resid |= 0176000; | |
372 | len = (((sizeof (struct en_header) + ENMTU) >> 1) + resid) << 1; | |
373 | len -= sizeof (struct en_header); | |
374 | if (len >= ENMTU) | |
375 | goto setup; /* sanity */ | |
f1b2fa5b | 376 | en = (struct en_header *)(es->es_ifuba.ifu_r.ifrw_addr); |
8a13b737 BJ |
377 | #define endataaddr(en, off, type) ((type)(((caddr_t)((en)+1)+(off)))) |
378 | if (en->en_type >= ENPUP_TRAIL && | |
379 | en->en_type < ENPUP_TRAIL+ENPUP_NTRAILER) { | |
380 | off = (en->en_type - ENPUP_TRAIL) * 512; | |
b454c3ea BJ |
381 | if (off >= ENMTU) |
382 | goto setup; /* sanity */ | |
8a13b737 | 383 | en->en_type = *endataaddr(en, off, u_short *); |
0658a645 BJ |
384 | resid = *(endataaddr(en, off+2, u_short *)); |
385 | if (off + resid > len) | |
386 | goto setup; /* sanity */ | |
387 | len = off + resid; | |
8a13b737 BJ |
388 | } else |
389 | off = 0; | |
8a13b737 BJ |
390 | if (len == 0) |
391 | goto setup; | |
f1b2fa5b BJ |
392 | /* |
393 | * Pull packet off interface. Off is nonzero if packet | |
394 | * has trailing header; if_rubaget will then force this header | |
395 | * information to be at the front, but we still have to drop | |
0658a645 | 396 | * the type and length which are at the front of any trailer data. |
f1b2fa5b BJ |
397 | */ |
398 | m = if_rubaget(&es->es_ifuba, len, off); | |
a453e1b5 BJ |
399 | if (m == 0) |
400 | goto setup; | |
f1b2fa5b | 401 | if (off) { |
0658a645 BJ |
402 | m->m_off += 2 * sizeof (u_short); |
403 | m->m_len -= 2 * sizeof (u_short); | |
f1b2fa5b | 404 | } |
31c2345c SL |
405 | switch (en->en_type) { |
406 | ||
407 | #ifdef INET | |
408 | case ENPUP_IPTYPE: | |
9c8692e9 | 409 | schednetisr(NETISR_IP); |
31c2345c SL |
410 | inq = &ipintrq; |
411 | break; | |
412 | #endif | |
ee787340 | 413 | #ifdef PUP |
31c2345c SL |
414 | case ENPUP_PUPTYPE: { |
415 | struct pup_header *pup = mtod(m, struct pup_header *); | |
416 | ||
417 | pupproto.sp_protocol = pup->pup_type; | |
418 | pupdst.spup_addr = pup->pup_dport; | |
419 | pupsrc.spup_addr = pup->pup_sport; | |
668cc26d | 420 | raw_input(m, &pupproto, (struct sockaddr *)&pupdst, |
ee787340 | 421 | (struct sockaddr *)&pupsrc); |
31c2345c | 422 | goto setup; |
31c2345c | 423 | } |
ee787340 | 424 | #endif |
c8f8184f BJ |
425 | default: |
426 | m_freem(m); | |
427 | goto setup; | |
ee787340 SL |
428 | } |
429 | ||
1e977657 BJ |
430 | if (IF_QFULL(inq)) { |
431 | IF_DROP(inq); | |
ee787340 | 432 | m_freem(m); |
1e977657 BJ |
433 | } else |
434 | IF_ENQUEUE(inq, m); | |
f1b2fa5b | 435 | |
ae348eea | 436 | setup: |
f1b2fa5b BJ |
437 | /* |
438 | * Reset for next packet. | |
439 | */ | |
440 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; | |
8a13b737 | 441 | addr->en_iwc = -(sizeof (struct en_header) + ENMTU) >> 1; |
941ee7ef | 442 | addr->en_istat = EN_IEN|EN_GO; |
ae348eea | 443 | } |
11720282 | 444 | |
8a13b737 BJ |
445 | /* |
446 | * Ethernet output routine. | |
447 | * Encapsulate a packet of type family for the local net. | |
f1b2fa5b BJ |
448 | * Use trailer local net encapsulation if enough data in first |
449 | * packet leaves a multiple of 512 bytes of data in remainder. | |
8a13b737 | 450 | */ |
ee787340 | 451 | enoutput(ifp, m0, dst) |
8a13b737 BJ |
452 | struct ifnet *ifp; |
453 | struct mbuf *m0; | |
ee787340 | 454 | struct sockaddr *dst; |
11720282 | 455 | { |
ee787340 | 456 | int type, dest, s; |
f1b2fa5b | 457 | register struct mbuf *m = m0; |
8a13b737 | 458 | register struct en_header *en; |
ee787340 | 459 | register int off; |
8a13b737 | 460 | |
9d1b03e0 | 461 | COUNT(ENOUTPUT); |
ee787340 | 462 | switch (dst->sa_family) { |
11720282 | 463 | |
8a13b737 | 464 | #ifdef INET |
ee787340 | 465 | case AF_INET: |
4e818526 BJ |
466 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
467 | if (dest & 0x00ffff00) | |
468 | goto drop; | |
469 | dest = (dest >> 24) & 0xff; | |
ee787340 SL |
470 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
471 | if (off > 0 && (off & 0x1ff) == 0 && | |
0658a645 | 472 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { |
8a13b737 | 473 | type = ENPUP_TRAIL + (off>>9); |
0658a645 BJ |
474 | m->m_off -= 2 * sizeof (u_short); |
475 | m->m_len += 2 * sizeof (u_short); | |
f1b2fa5b | 476 | *mtod(m, u_short *) = ENPUP_IPTYPE; |
0658a645 | 477 | *(mtod(m, u_short *) + 1) = m->m_len; |
f1b2fa5b | 478 | goto gottrailertype; |
8a13b737 | 479 | } |
f1b2fa5b BJ |
480 | type = ENPUP_IPTYPE; |
481 | off = 0; | |
482 | goto gottype; | |
8a13b737 | 483 | #endif |
31c2345c | 484 | #ifdef PUP |
ee787340 SL |
485 | case AF_PUP: |
486 | dest = ((struct sockaddr_pup *)dst)->spup_addr.pp_host; | |
31c2345c SL |
487 | type = ENPUP_PUPTYPE; |
488 | off = 0; | |
489 | goto gottype; | |
31c2345c | 490 | #endif |
8a13b737 BJ |
491 | |
492 | default: | |
ee787340 SL |
493 | printf("en%d: can't handle af%d\n", ifp->if_unit, |
494 | dst->sa_family); | |
8a13b737 BJ |
495 | m_freem(m0); |
496 | return (0); | |
497 | } | |
f1b2fa5b | 498 | |
b454c3ea | 499 | gottrailertype: |
f1b2fa5b BJ |
500 | /* |
501 | * Packet to be sent as trailer: move first packet | |
502 | * (control information) to end of chain. | |
503 | */ | |
f1b2fa5b BJ |
504 | while (m->m_next) |
505 | m = m->m_next; | |
506 | m->m_next = m0; | |
507 | m = m0->m_next; | |
508 | m0->m_next = 0; | |
b454c3ea | 509 | m0 = m; |
f1b2fa5b | 510 | |
b454c3ea | 511 | gottype: |
f1b2fa5b BJ |
512 | /* |
513 | * Add local net header. If no space in first mbuf, | |
514 | * allocate another. | |
515 | */ | |
a453e1b5 BJ |
516 | if (m->m_off > MMAXOFF || |
517 | MMINOFF + sizeof (struct en_header) > m->m_off) { | |
ef9b4258 | 518 | m = m_get(M_DONTWAIT); |
8a13b737 BJ |
519 | if (m == 0) { |
520 | m_freem(m0); | |
521 | return (0); | |
522 | } | |
523 | m->m_next = m0; | |
524 | m->m_off = MMINOFF; | |
525 | m->m_len = sizeof (struct en_header); | |
526 | } else { | |
8a13b737 BJ |
527 | m->m_off -= sizeof (struct en_header); |
528 | m->m_len += sizeof (struct en_header); | |
11720282 | 529 | } |
8a13b737 BJ |
530 | en = mtod(m, struct en_header *); |
531 | en->en_shost = ifp->if_host[0]; | |
532 | en->en_dhost = dest; | |
533 | en->en_type = type; | |
f1b2fa5b BJ |
534 | |
535 | /* | |
536 | * Queue message on interface, and start output if interface | |
537 | * not yet active. | |
538 | */ | |
8a13b737 | 539 | s = splimp(); |
1e977657 BJ |
540 | if (IF_QFULL(&ifp->if_snd)) { |
541 | IF_DROP(&ifp->if_snd); | |
4e818526 | 542 | goto bad; |
1e977657 | 543 | } |
8a13b737 | 544 | IF_ENQUEUE(&ifp->if_snd, m); |
8a13b737 BJ |
545 | if (en_softc[ifp->if_unit].es_oactive == 0) |
546 | enstart(ifp->if_unit); | |
89413846 | 547 | splx(s); |
f1b2fa5b | 548 | return (1); |
4e818526 BJ |
549 | bad: |
550 | m_freem(m); | |
551 | splx(s); | |
552 | return (0); | |
11720282 | 553 | } |
a9f3e174 SL |
554 | |
555 | #if NIMP == 0 && NEN > 0 | |
556 | /* | |
557 | * Logical host interface driver. | |
558 | * Allows host to appear as an ARPAnet | |
559 | * logical host. Must also have routing | |
560 | * table entry set up to forward packets | |
561 | * to appropriate gateway on localnet. | |
562 | */ | |
563 | ||
564 | struct ifnet enlhif; | |
565 | int enlhoutput(); | |
566 | ||
567 | /* | |
568 | * Called by localnet interface to allow logical | |
569 | * host interface to "attach". Nothing should ever | |
570 | * be sent locally to this interface, it's purpose | |
571 | * is simply to establish the host's arpanet address. | |
572 | */ | |
573 | enlhinit(addr) | |
574 | int addr; | |
575 | { | |
576 | register struct ifnet *ifp = &enlhif; | |
577 | register struct sockaddr_in *sin; | |
578 | ||
579 | COUNT(ENLHINIT); | |
580 | ifp->if_name = "lh"; | |
581 | ifp->if_mtu = ENMTU; | |
582 | sin = (struct sockaddr_in *)&ifp->if_addr; | |
583 | sin->sin_family = AF_INET; | |
584 | sin->sin_addr.s_addr = addr; | |
585 | ifp->if_net = sin->sin_addr.s_net; | |
586 | ifp->if_flags = IFF_UP; | |
587 | ifp->if_output = enlhoutput; /* should never be used */ | |
588 | if_attach(ifp); | |
589 | } | |
590 | ||
591 | enlhoutput(ifp, m0, dst) | |
592 | struct ifnet *ifp; | |
593 | struct mbuf *m0; | |
594 | struct sockaddr *dst; | |
595 | { | |
596 | COUNT(ENLHOUTPUT); | |
597 | ifp->if_oerrors++; | |
598 | m_freem(m0); | |
599 | return (0); | |
600 | } | |
601 | #endif |