Commit | Line | Data |
---|---|---|
80a4458b | 1 | /* if_en.c 4.46 82/03/30 */ |
11720282 BJ |
2 | |
3 | #include "en.h" | |
f1b2fa5b | 4 | |
11720282 | 5 | /* |
f1b2fa5b | 6 | * Xerox prototype (3 Mb) Ethernet interface driver. |
11720282 BJ |
7 | */ |
8 | ||
9 | #include "../h/param.h" | |
10 | #include "../h/systm.h" | |
11 | #include "../h/mbuf.h" | |
11720282 BJ |
12 | #include "../h/pte.h" |
13 | #include "../h/buf.h" | |
8a13b737 BJ |
14 | #include "../h/protosw.h" |
15 | #include "../h/socket.h" | |
11720282 BJ |
16 | #include "../h/ubareg.h" |
17 | #include "../h/ubavar.h" | |
11720282 | 18 | #include "../h/enreg.h" |
11720282 | 19 | #include "../h/cpu.h" |
8a13b737 BJ |
20 | #include "../h/mtpr.h" |
21 | #include "../h/vmmac.h" | |
22 | #include "../net/in.h" | |
23 | #include "../net/in_systm.h" | |
24 | #include "../net/if.h" | |
25 | #include "../net/if_en.h" | |
26 | #include "../net/if_uba.h" | |
27 | #include "../net/ip.h" | |
28 | #include "../net/ip_var.h" | |
31c2345c | 29 | #include "../net/pup.h" |
f6311fb6 | 30 | #include "../net/route.h" |
8a13b737 | 31 | |
a453e1b5 | 32 | #define ENMTU (1024+512) |
11720282 | 33 | |
11720282 BJ |
34 | int enprobe(), enattach(), enrint(), enxint(), encollide(); |
35 | struct uba_device *eninfo[NEN]; | |
36 | u_short enstd[] = { 0 }; | |
37 | struct uba_driver endriver = | |
b454c3ea | 38 | { enprobe, 0, enattach, 0, enstd, "en", eninfo }; |
11720282 BJ |
39 | #define ENUNIT(x) minor(x) |
40 | ||
f1b2fa5b BJ |
41 | int eninit(),enoutput(),enreset(); |
42 | ||
43 | /* | |
44 | * Ethernet software status per interface. | |
45 | * | |
46 | * Each interface is referenced by a network interface structure, | |
47 | * es_if, which the routing code uses to locate the interface. | |
48 | * This structure contains the output queue for the interface, its address, ... | |
49 | * We also have, for each interface, a UBA interface structure, which | |
50 | * contains information about the UNIBUS resources held by the interface: | |
51 | * map registers, buffered data paths, etc. Information is cached in this | |
52 | * structure for use by the if_uba.c routines in running the interface | |
53 | * efficiently. | |
54 | */ | |
8a13b737 | 55 | struct en_softc { |
f1b2fa5b BJ |
56 | struct ifnet es_if; /* network-visible interface */ |
57 | struct ifuba es_ifuba; /* UNIBUS resources */ | |
58 | short es_delay; /* current output delay */ | |
59 | short es_mask; /* mask for current output delay */ | |
60 | u_char es_lastx; /* host last transmitted to */ | |
61 | short es_oactive; /* is output active? */ | |
62 | short es_olen; /* length of last output */ | |
8a13b737 | 63 | } en_softc[NEN]; |
11720282 | 64 | |
f1b2fa5b BJ |
65 | /* |
66 | * Do output DMA to determine interface presence and | |
67 | * interrupt vector. DMA is too short to disturb other hosts. | |
68 | */ | |
11720282 BJ |
69 | enprobe(reg) |
70 | caddr_t reg; | |
71 | { | |
b454c3ea | 72 | register int br, cvec; /* r11, r10 value-result */ |
11720282 BJ |
73 | register struct endevice *addr = (struct endevice *)reg; |
74 | ||
8a13b737 | 75 | COUNT(ENPROBE); |
11720282 BJ |
76 | #ifdef lint |
77 | br = 0; cvec = br; br = cvec; | |
2b4b57cd | 78 | enrint(0); enxint(0); encollide(0); |
11720282 | 79 | #endif |
11720282 | 80 | addr->en_istat = 0; |
11720282 BJ |
81 | addr->en_owc = -1; |
82 | addr->en_oba = 0; | |
941ee7ef | 83 | addr->en_ostat = EN_IEN|EN_GO; |
11720282 BJ |
84 | DELAY(100000); |
85 | addr->en_ostat = 0; | |
11720282 BJ |
86 | return (1); |
87 | } | |
88 | ||
f1b2fa5b BJ |
89 | /* |
90 | * Interface exists: make available by filling in network interface | |
91 | * record. System will initialize the interface when it is ready | |
92 | * to accept packets. | |
93 | */ | |
11720282 BJ |
94 | enattach(ui) |
95 | struct uba_device *ui; | |
96 | { | |
f1b2fa5b | 97 | register struct en_softc *es = &en_softc[ui->ui_unit]; |
ee787340 | 98 | register struct sockaddr_in *sin; |
8a13b737 | 99 | COUNT(ENATTACH); |
f1b2fa5b BJ |
100 | |
101 | es->es_if.if_unit = ui->ui_unit; | |
b454c3ea | 102 | es->es_if.if_name = "en"; |
f1b2fa5b BJ |
103 | es->es_if.if_mtu = ENMTU; |
104 | es->es_if.if_net = ui->ui_flags; | |
105 | es->es_if.if_host[0] = | |
ee787340 SL |
106 | (~(((struct endevice *)eninfo[ui->ui_unit]->ui_addr)->en_addr)) & 0xff; |
107 | sin = (struct sockaddr_in *)&es->es_if.if_addr; | |
108 | sin->sin_family = AF_INET; | |
109 | sin->sin_addr = if_makeaddr(es->es_if.if_net, es->es_if.if_host[0]); | |
110 | sin = (struct sockaddr_in *)&es->es_if.if_broadaddr; | |
111 | sin->sin_family = AF_INET; | |
112 | sin->sin_addr = if_makeaddr(es->es_if.if_net, 0); | |
113 | es->es_if.if_flags = IFF_BROADCAST; | |
f1b2fa5b | 114 | es->es_if.if_init = eninit; |
b454c3ea | 115 | es->es_if.if_output = enoutput; |
f1b2fa5b | 116 | es->es_if.if_ubareset = enreset; |
7a66118b | 117 | es->es_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16; |
405c9168 | 118 | if_attach(&es->es_if); |
11720282 BJ |
119 | } |
120 | ||
f1b2fa5b BJ |
121 | /* |
122 | * Reset of interface after UNIBUS reset. | |
123 | * If interface is on specified uba, reset its state. | |
124 | */ | |
125 | enreset(unit, uban) | |
126 | int unit, uban; | |
8a13b737 | 127 | { |
11720282 | 128 | register struct uba_device *ui; |
f1b2fa5b | 129 | COUNT(ENRESET); |
11720282 | 130 | |
b454c3ea BJ |
131 | if (unit >= NEN || (ui = eninfo[unit]) == 0 || ui->ui_alive == 0 || |
132 | ui->ui_ubanum != uban) | |
f1b2fa5b | 133 | return; |
b454c3ea | 134 | printf(" en%d", unit); |
f1b2fa5b BJ |
135 | eninit(unit); |
136 | } | |
137 | ||
138 | /* | |
139 | * Initialization of interface; clear recorded pending | |
140 | * operations, and reinitialize UNIBUS usage. | |
141 | */ | |
142 | eninit(unit) | |
143 | int unit; | |
144 | { | |
b454c3ea BJ |
145 | register struct en_softc *es = &en_softc[unit]; |
146 | register struct uba_device *ui = eninfo[unit]; | |
f1b2fa5b | 147 | register struct endevice *addr; |
f1b2fa5b BJ |
148 | int s; |
149 | ||
f1b2fa5b | 150 | if (if_ubainit(&es->es_ifuba, ui->ui_ubanum, |
81950b45 | 151 | sizeof (struct en_header), (int)btoc(ENMTU)) == 0) { |
b454c3ea | 152 | printf("en%d: can't initialize\n", unit); |
ee787340 | 153 | es->es_if.if_flags &= ~IFF_UP; |
8a13b737 | 154 | return; |
11720282 | 155 | } |
11720282 | 156 | addr = (struct endevice *)ui->ui_addr; |
8a13b737 | 157 | addr->en_istat = addr->en_ostat = 0; |
11720282 | 158 | |
f1b2fa5b | 159 | /* |
b454c3ea BJ |
160 | * Hang a receive and start any |
161 | * pending writes by faking a transmit complete. | |
f1b2fa5b BJ |
162 | */ |
163 | s = splimp(); | |
b454c3ea BJ |
164 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; |
165 | addr->en_iwc = -(sizeof (struct en_header) + ENMTU) >> 1; | |
166 | addr->en_istat = EN_IEN|EN_GO; | |
167 | es->es_oactive = 1; | |
ee787340 | 168 | es->es_if.if_flags |= IFF_UP; |
f1b2fa5b BJ |
169 | enxint(unit); |
170 | splx(s); | |
f6311fb6 | 171 | if_rtinit(&es->es_if, RTF_DIRECT|RTF_UP); |
11720282 BJ |
172 | } |
173 | ||
3552a746 | 174 | int enlastdel = 25; |
8a13b737 | 175 | |
f1b2fa5b BJ |
176 | /* |
177 | * Start or restart output on interface. | |
178 | * If interface is already active, then this is a retransmit | |
179 | * after a collision, and just restuff registers and delay. | |
180 | * If interface is not already active, get another datagram | |
181 | * to send off of the interface queue, and map it to the interface | |
182 | * before starting the output. | |
183 | */ | |
ae348eea | 184 | enstart(dev) |
11720282 BJ |
185 | dev_t dev; |
186 | { | |
b454c3ea BJ |
187 | int unit = ENUNIT(dev); |
188 | struct uba_device *ui = eninfo[unit]; | |
189 | register struct en_softc *es = &en_softc[unit]; | |
8a13b737 | 190 | register struct endevice *addr; |
8a13b737 BJ |
191 | struct mbuf *m; |
192 | int dest; | |
ae348eea | 193 | COUNT(ENSTART); |
11720282 | 194 | |
8a13b737 BJ |
195 | if (es->es_oactive) |
196 | goto restart; | |
f1b2fa5b BJ |
197 | |
198 | /* | |
199 | * Not already active: dequeue another request | |
200 | * and map it to the UNIBUS. If no more requests, | |
201 | * just return. | |
202 | */ | |
203 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
8a13b737 BJ |
204 | if (m == 0) { |
205 | es->es_oactive = 0; | |
11720282 BJ |
206 | return; |
207 | } | |
a453e1b5 | 208 | dest = mtod(m, struct en_header *)->en_dhost; |
8a13b737 | 209 | es->es_olen = if_wubaput(&es->es_ifuba, m); |
f1b2fa5b BJ |
210 | |
211 | /* | |
212 | * Ethernet cannot take back-to-back packets (no | |
213 | * buffering in interface. To avoid overrunning | |
214 | * receiver, enforce a small delay (about 1ms) in interface | |
215 | * on successive packets sent to same host. | |
216 | */ | |
8a13b737 BJ |
217 | if (es->es_lastx && es->es_lastx == dest) |
218 | es->es_delay = enlastdel; | |
219 | else | |
220 | es->es_lastx = dest; | |
f1b2fa5b | 221 | |
8a13b737 | 222 | restart: |
f1b2fa5b BJ |
223 | /* |
224 | * Have request mapped to UNIBUS for transmission. | |
225 | * Purge any stale data from this BDP, and start the otput. | |
226 | */ | |
ee787340 SL |
227 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
228 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_w.ifrw_bdp); | |
11720282 | 229 | addr = (struct endevice *)ui->ui_addr; |
405c9168 | 230 | addr->en_oba = (int)es->es_ifuba.ifu_w.ifrw_info; |
8a13b737 BJ |
231 | addr->en_odelay = es->es_delay; |
232 | addr->en_owc = -((es->es_olen + 1) >> 1); | |
941ee7ef | 233 | addr->en_ostat = EN_IEN|EN_GO; |
8a13b737 | 234 | es->es_oactive = 1; |
11720282 BJ |
235 | } |
236 | ||
f1b2fa5b BJ |
237 | /* |
238 | * Ethernet interface transmitter interrupt. | |
239 | * Start another output if more data to send. | |
240 | */ | |
11720282 BJ |
241 | enxint(unit) |
242 | int unit; | |
243 | { | |
b454c3ea BJ |
244 | register struct uba_device *ui = eninfo[unit]; |
245 | register struct en_softc *es = &en_softc[unit]; | |
519a1ecf | 246 | register struct endevice *addr = (struct endevice *)ui->ui_addr; |
11720282 BJ |
247 | COUNT(ENXINT); |
248 | ||
8a13b737 BJ |
249 | if (es->es_oactive == 0) |
250 | return; | |
519a1ecf | 251 | if (es->es_mask && (addr->en_ostat&EN_OERROR)) { |
89413846 | 252 | es->es_if.if_oerrors++; |
4020bf24 BJ |
253 | if (es->es_if.if_oerrors % 100 == 0) |
254 | printf("en%d: += 100 output errors\n", unit); | |
519a1ecf BJ |
255 | endocoll(unit); |
256 | return; | |
89413846 | 257 | } |
519a1ecf BJ |
258 | es->es_if.if_opackets++; |
259 | es->es_oactive = 0; | |
260 | es->es_delay = 0; | |
261 | es->es_mask = ~0; | |
7a66118b BJ |
262 | if (es->es_ifuba.ifu_xtofree) { |
263 | m_freem(es->es_ifuba.ifu_xtofree); | |
264 | es->es_ifuba.ifu_xtofree = 0; | |
265 | } | |
f1b2fa5b | 266 | if (es->es_if.if_snd.ifq_head == 0) { |
8a13b737 | 267 | es->es_lastx = 0; |
11720282 BJ |
268 | return; |
269 | } | |
8a13b737 | 270 | enstart(unit); |
11720282 BJ |
271 | } |
272 | ||
f1b2fa5b BJ |
273 | /* |
274 | * Collision on ethernet interface. Do exponential | |
275 | * backoff, and retransmit. If have backed off all | |
ee787340 | 276 | * the way print warning diagnostic, and drop packet. |
f1b2fa5b | 277 | */ |
11720282 BJ |
278 | encollide(unit) |
279 | int unit; | |
280 | { | |
519a1ecf | 281 | struct en_softc *es = &en_softc[unit]; |
11720282 BJ |
282 | COUNT(ENCOLLIDE); |
283 | ||
f1b2fa5b | 284 | es->es_if.if_collisions++; |
8a13b737 | 285 | if (es->es_oactive == 0) |
11720282 | 286 | return; |
519a1ecf BJ |
287 | endocoll(unit); |
288 | } | |
289 | ||
290 | endocoll(unit) | |
291 | int unit; | |
292 | { | |
293 | register struct en_softc *es = &en_softc[unit]; | |
294 | ||
b454c3ea BJ |
295 | /* |
296 | * Es_mask is a 16 bit number with n low zero bits, with | |
297 | * n the number of backoffs. When es_mask is 0 we have | |
298 | * backed off 16 times, and give up. | |
299 | */ | |
8a13b737 | 300 | if (es->es_mask == 0) { |
a453e1b5 | 301 | printf("en%d: send error\n", unit); |
8a13b737 | 302 | enxint(unit); |
b454c3ea | 303 | return; |
11720282 | 304 | } |
b454c3ea BJ |
305 | /* |
306 | * Another backoff. Restart with delay based on n low bits | |
307 | * of the interval timer. | |
308 | */ | |
309 | es->es_mask <<= 1; | |
310 | es->es_delay = mfpr(ICR) &~ es->es_mask; | |
311 | enstart(unit); | |
11720282 BJ |
312 | } |
313 | ||
31c2345c SL |
314 | struct sockaddr_pup pupsrc = { AF_PUP }; |
315 | struct sockaddr_pup pupdst = { AF_PUP }; | |
316 | struct sockproto pupproto = { PF_PUP }; | |
f1b2fa5b BJ |
317 | /* |
318 | * Ethernet interface receiver interrupt. | |
319 | * If input error just drop packet. | |
320 | * Otherwise purge input buffered data path and examine | |
321 | * packet to determine type. If can't determine length | |
322 | * from type, then have to drop packet. Othewise decapsulate | |
323 | * packet based on type and pass to type specific higher-level | |
324 | * input routine. | |
325 | */ | |
11720282 BJ |
326 | enrint(unit) |
327 | int unit; | |
328 | { | |
b454c3ea BJ |
329 | register struct en_softc *es = &en_softc[unit]; |
330 | struct endevice *addr = (struct endevice *)eninfo[unit]->ui_addr; | |
331 | register struct en_header *en; | |
8a13b737 | 332 | struct mbuf *m; |
b454c3ea BJ |
333 | int len; |
334 | register struct ifqueue *inq; | |
8a13b737 | 335 | int off; |
11720282 BJ |
336 | COUNT(ENRINT); |
337 | ||
b454c3ea | 338 | es->es_if.if_ipackets++; |
f1b2fa5b BJ |
339 | |
340 | /* | |
b454c3ea | 341 | * Purge BDP; drop if input error indicated. |
f1b2fa5b | 342 | */ |
ee787340 SL |
343 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
344 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_r.ifrw_bdp); | |
941ee7ef | 345 | if (addr->en_istat&EN_IERROR) { |
f1b2fa5b | 346 | es->es_if.if_ierrors++; |
4020bf24 BJ |
347 | if (es->es_if.if_ierrors % 100 == 0) |
348 | printf("en%d: += 100 input errors\n", unit); | |
8a13b737 | 349 | goto setup; |
11720282 | 350 | } |
f1b2fa5b BJ |
351 | |
352 | /* | |
353 | * Get pointer to ethernet header (in input buffer). | |
354 | * Deal with trailer protocol: if type is PUP trailer | |
355 | * get true type from first 16-bit word past data. | |
356 | * Remember that type was trailer by setting off. | |
357 | */ | |
358 | en = (struct en_header *)(es->es_ifuba.ifu_r.ifrw_addr); | |
8a13b737 BJ |
359 | #define endataaddr(en, off, type) ((type)(((caddr_t)((en)+1)+(off)))) |
360 | if (en->en_type >= ENPUP_TRAIL && | |
361 | en->en_type < ENPUP_TRAIL+ENPUP_NTRAILER) { | |
362 | off = (en->en_type - ENPUP_TRAIL) * 512; | |
b454c3ea BJ |
363 | if (off >= ENMTU) |
364 | goto setup; /* sanity */ | |
8a13b737 | 365 | en->en_type = *endataaddr(en, off, u_short *); |
8a13b737 BJ |
366 | } else |
367 | off = 0; | |
f1b2fa5b BJ |
368 | |
369 | /* | |
370 | * Attempt to infer packet length from type; | |
371 | * can't deal with packet if can't infer length. | |
372 | */ | |
8a13b737 BJ |
373 | switch (en->en_type) { |
374 | ||
375 | #ifdef INET | |
376 | case ENPUP_IPTYPE: | |
ee787340 SL |
377 | len = htons((u_short)endataaddr(en, |
378 | off ? off + sizeof (u_short) : 0, struct ip *)->ip_len); | |
11720282 BJ |
379 | break; |
380 | #endif | |
31c2345c SL |
381 | #ifdef PUP |
382 | case ENPUP_PUPTYPE: | |
ee787340 SL |
383 | len = endataaddr(en, off ? off + sizeof (u_short) : 0, |
384 | struct pup_header *)->pup_length; | |
31c2345c SL |
385 | break; |
386 | #endif | |
387 | ||
8a13b737 | 388 | default: |
5d855bdf | 389 | printf("en%d: unknown pkt type 0x%x\n", unit, en->en_type); |
8a13b737 | 390 | goto setup; |
11720282 | 391 | } |
80a4458b SL |
392 | if (off) |
393 | len += sizeof (u_short); | |
8a13b737 BJ |
394 | if (len == 0) |
395 | goto setup; | |
f1b2fa5b BJ |
396 | |
397 | /* | |
398 | * Pull packet off interface. Off is nonzero if packet | |
399 | * has trailing header; if_rubaget will then force this header | |
400 | * information to be at the front, but we still have to drop | |
b454c3ea | 401 | * the two-byte type which is at the front of any trailer data. |
f1b2fa5b BJ |
402 | */ |
403 | m = if_rubaget(&es->es_ifuba, len, off); | |
a453e1b5 BJ |
404 | if (m == 0) |
405 | goto setup; | |
f1b2fa5b | 406 | if (off) { |
ee787340 SL |
407 | m->m_off += sizeof (u_short); |
408 | m->m_len -= sizeof (u_short); | |
f1b2fa5b | 409 | } |
31c2345c SL |
410 | switch (en->en_type) { |
411 | ||
412 | #ifdef INET | |
413 | case ENPUP_IPTYPE: | |
9c8692e9 | 414 | schednetisr(NETISR_IP); |
31c2345c SL |
415 | inq = &ipintrq; |
416 | break; | |
417 | #endif | |
ee787340 | 418 | #ifdef PUP |
31c2345c SL |
419 | case ENPUP_PUPTYPE: { |
420 | struct pup_header *pup = mtod(m, struct pup_header *); | |
421 | ||
422 | pupproto.sp_protocol = pup->pup_type; | |
423 | pupdst.spup_addr = pup->pup_dport; | |
424 | pupsrc.spup_addr = pup->pup_sport; | |
668cc26d | 425 | raw_input(m, &pupproto, (struct sockaddr *)&pupdst, |
ee787340 | 426 | (struct sockaddr *)&pupsrc); |
31c2345c | 427 | goto setup; |
31c2345c | 428 | } |
ee787340 SL |
429 | #endif |
430 | } | |
431 | ||
1e977657 BJ |
432 | if (IF_QFULL(inq)) { |
433 | IF_DROP(inq); | |
ee787340 | 434 | m_freem(m); |
1e977657 BJ |
435 | } else |
436 | IF_ENQUEUE(inq, m); | |
f1b2fa5b | 437 | |
ae348eea | 438 | setup: |
f1b2fa5b BJ |
439 | /* |
440 | * Reset for next packet. | |
441 | */ | |
442 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; | |
8a13b737 | 443 | addr->en_iwc = -(sizeof (struct en_header) + ENMTU) >> 1; |
941ee7ef | 444 | addr->en_istat = EN_IEN|EN_GO; |
ae348eea | 445 | } |
11720282 | 446 | |
8a13b737 BJ |
447 | /* |
448 | * Ethernet output routine. | |
449 | * Encapsulate a packet of type family for the local net. | |
f1b2fa5b BJ |
450 | * Use trailer local net encapsulation if enough data in first |
451 | * packet leaves a multiple of 512 bytes of data in remainder. | |
8a13b737 | 452 | */ |
ee787340 | 453 | enoutput(ifp, m0, dst) |
8a13b737 BJ |
454 | struct ifnet *ifp; |
455 | struct mbuf *m0; | |
ee787340 | 456 | struct sockaddr *dst; |
11720282 | 457 | { |
ee787340 | 458 | int type, dest, s; |
f1b2fa5b | 459 | register struct mbuf *m = m0; |
8a13b737 | 460 | register struct en_header *en; |
ee787340 | 461 | register int off; |
8a13b737 | 462 | |
9d1b03e0 | 463 | COUNT(ENOUTPUT); |
ee787340 | 464 | switch (dst->sa_family) { |
11720282 | 465 | |
8a13b737 | 466 | #ifdef INET |
ee787340 SL |
467 | case AF_INET: |
468 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr >> 24; | |
469 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; | |
470 | if (off > 0 && (off & 0x1ff) == 0 && | |
471 | m->m_off >= MMINOFF + sizeof (u_short)) { | |
8a13b737 | 472 | type = ENPUP_TRAIL + (off>>9); |
ee787340 SL |
473 | m->m_off -= sizeof (u_short); |
474 | m->m_len += sizeof (u_short); | |
f1b2fa5b BJ |
475 | *mtod(m, u_short *) = ENPUP_IPTYPE; |
476 | goto gottrailertype; | |
8a13b737 | 477 | } |
f1b2fa5b BJ |
478 | type = ENPUP_IPTYPE; |
479 | off = 0; | |
480 | goto gottype; | |
8a13b737 | 481 | #endif |
31c2345c | 482 | #ifdef PUP |
ee787340 SL |
483 | case AF_PUP: |
484 | dest = ((struct sockaddr_pup *)dst)->spup_addr.pp_host; | |
485 | off = mtod(m, struct pup_header *)->pup_length - m->m_len; | |
486 | if (off > 0 && (off & 0x1ff) == 0 && | |
487 | m->m_off >= MMINOFF + sizeof (u_short)) { | |
31c2345c | 488 | type = ENPUP_TRAIL + (off>>9); |
ee787340 SL |
489 | m->m_off -= sizeof (u_short); |
490 | m->m_len += sizeof (u_short); | |
31c2345c SL |
491 | *mtod(m, u_short *) = ENPUP_PUPTYPE; |
492 | goto gottrailertype; | |
493 | } | |
494 | type = ENPUP_PUPTYPE; | |
495 | off = 0; | |
496 | goto gottype; | |
31c2345c | 497 | #endif |
8a13b737 BJ |
498 | |
499 | default: | |
ee787340 SL |
500 | printf("en%d: can't handle af%d\n", ifp->if_unit, |
501 | dst->sa_family); | |
8a13b737 BJ |
502 | m_freem(m0); |
503 | return (0); | |
504 | } | |
f1b2fa5b | 505 | |
b454c3ea | 506 | gottrailertype: |
f1b2fa5b BJ |
507 | /* |
508 | * Packet to be sent as trailer: move first packet | |
509 | * (control information) to end of chain. | |
510 | */ | |
f1b2fa5b BJ |
511 | while (m->m_next) |
512 | m = m->m_next; | |
513 | m->m_next = m0; | |
514 | m = m0->m_next; | |
515 | m0->m_next = 0; | |
b454c3ea | 516 | m0 = m; |
f1b2fa5b | 517 | |
b454c3ea | 518 | gottype: |
f1b2fa5b BJ |
519 | /* |
520 | * Add local net header. If no space in first mbuf, | |
521 | * allocate another. | |
522 | */ | |
a453e1b5 BJ |
523 | if (m->m_off > MMAXOFF || |
524 | MMINOFF + sizeof (struct en_header) > m->m_off) { | |
ef9b4258 | 525 | m = m_get(M_DONTWAIT); |
8a13b737 BJ |
526 | if (m == 0) { |
527 | m_freem(m0); | |
528 | return (0); | |
529 | } | |
530 | m->m_next = m0; | |
531 | m->m_off = MMINOFF; | |
532 | m->m_len = sizeof (struct en_header); | |
533 | } else { | |
8a13b737 BJ |
534 | m->m_off -= sizeof (struct en_header); |
535 | m->m_len += sizeof (struct en_header); | |
11720282 | 536 | } |
8a13b737 BJ |
537 | en = mtod(m, struct en_header *); |
538 | en->en_shost = ifp->if_host[0]; | |
539 | en->en_dhost = dest; | |
540 | en->en_type = type; | |
f1b2fa5b BJ |
541 | |
542 | /* | |
543 | * Queue message on interface, and start output if interface | |
544 | * not yet active. | |
545 | */ | |
8a13b737 | 546 | s = splimp(); |
1e977657 BJ |
547 | if (IF_QFULL(&ifp->if_snd)) { |
548 | IF_DROP(&ifp->if_snd); | |
549 | m_freem(m); | |
550 | splx(s); | |
551 | return (0); | |
552 | } | |
8a13b737 | 553 | IF_ENQUEUE(&ifp->if_snd, m); |
8a13b737 BJ |
554 | if (en_softc[ifp->if_unit].es_oactive == 0) |
555 | enstart(ifp->if_unit); | |
89413846 | 556 | splx(s); |
f1b2fa5b | 557 | return (1); |
11720282 | 558 | } |