Commit | Line | Data |
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00f2f0c1 | 1 | /* if_en.c 4.66 82/06/14 */ |
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" |
8a2f82db | 31 | #include <errno.h> |
8a13b737 | 32 | |
a453e1b5 | 33 | #define ENMTU (1024+512) |
dc39362e | 34 | #define ENMRU (1024+512+16) /* 16 is enough to receive trailer */ |
11720282 | 35 | |
11720282 BJ |
36 | int enprobe(), enattach(), enrint(), enxint(), encollide(); |
37 | struct uba_device *eninfo[NEN]; | |
38 | u_short enstd[] = { 0 }; | |
39 | struct uba_driver endriver = | |
b454c3ea | 40 | { enprobe, 0, enattach, 0, enstd, "en", eninfo }; |
11720282 BJ |
41 | #define ENUNIT(x) minor(x) |
42 | ||
f1b2fa5b BJ |
43 | int eninit(),enoutput(),enreset(); |
44 | ||
45 | /* | |
46 | * Ethernet software status per interface. | |
47 | * | |
48 | * Each interface is referenced by a network interface structure, | |
49 | * es_if, which the routing code uses to locate the interface. | |
50 | * This structure contains the output queue for the interface, its address, ... | |
51 | * We also have, for each interface, a UBA interface structure, which | |
52 | * contains information about the UNIBUS resources held by the interface: | |
53 | * map registers, buffered data paths, etc. Information is cached in this | |
54 | * structure for use by the if_uba.c routines in running the interface | |
55 | * efficiently. | |
56 | */ | |
8a13b737 | 57 | struct en_softc { |
f1b2fa5b BJ |
58 | struct ifnet es_if; /* network-visible interface */ |
59 | struct ifuba es_ifuba; /* UNIBUS resources */ | |
60 | short es_delay; /* current output delay */ | |
61 | short es_mask; /* mask for current output delay */ | |
0658a645 | 62 | short es_lastx; /* host last transmitted to */ |
f1b2fa5b BJ |
63 | short es_oactive; /* is output active? */ |
64 | short es_olen; /* length of last output */ | |
8a13b737 | 65 | } en_softc[NEN]; |
11720282 | 66 | |
f1b2fa5b BJ |
67 | /* |
68 | * Do output DMA to determine interface presence and | |
69 | * interrupt vector. DMA is too short to disturb other hosts. | |
70 | */ | |
11720282 BJ |
71 | enprobe(reg) |
72 | caddr_t reg; | |
73 | { | |
b454c3ea | 74 | register int br, cvec; /* r11, r10 value-result */ |
11720282 BJ |
75 | register struct endevice *addr = (struct endevice *)reg; |
76 | ||
8a13b737 | 77 | COUNT(ENPROBE); |
11720282 BJ |
78 | #ifdef lint |
79 | br = 0; cvec = br; br = cvec; | |
2b4b57cd | 80 | enrint(0); enxint(0); encollide(0); |
11720282 | 81 | #endif |
11720282 | 82 | addr->en_istat = 0; |
11720282 BJ |
83 | addr->en_owc = -1; |
84 | addr->en_oba = 0; | |
941ee7ef | 85 | addr->en_ostat = EN_IEN|EN_GO; |
11720282 BJ |
86 | DELAY(100000); |
87 | addr->en_ostat = 0; | |
7d6f1cd5 SL |
88 | #ifdef ECHACK |
89 | br = 0x16; | |
90 | #endif | |
11720282 BJ |
91 | return (1); |
92 | } | |
93 | ||
f1b2fa5b BJ |
94 | /* |
95 | * Interface exists: make available by filling in network interface | |
96 | * record. System will initialize the interface when it is ready | |
97 | * to accept packets. | |
98 | */ | |
11720282 BJ |
99 | enattach(ui) |
100 | struct uba_device *ui; | |
101 | { | |
f1b2fa5b | 102 | register struct en_softc *es = &en_softc[ui->ui_unit]; |
ee787340 | 103 | register struct sockaddr_in *sin; |
8a13b737 | 104 | COUNT(ENATTACH); |
f1b2fa5b BJ |
105 | |
106 | es->es_if.if_unit = ui->ui_unit; | |
b454c3ea | 107 | es->es_if.if_name = "en"; |
f1b2fa5b | 108 | es->es_if.if_mtu = ENMTU; |
6187f8f4 | 109 | es->es_if.if_net = ui->ui_flags; |
f1b2fa5b | 110 | es->es_if.if_host[0] = |
ee787340 SL |
111 | (~(((struct endevice *)eninfo[ui->ui_unit]->ui_addr)->en_addr)) & 0xff; |
112 | sin = (struct sockaddr_in *)&es->es_if.if_addr; | |
113 | sin->sin_family = AF_INET; | |
114 | sin->sin_addr = if_makeaddr(es->es_if.if_net, es->es_if.if_host[0]); | |
115 | sin = (struct sockaddr_in *)&es->es_if.if_broadaddr; | |
116 | sin->sin_family = AF_INET; | |
117 | sin->sin_addr = if_makeaddr(es->es_if.if_net, 0); | |
118 | es->es_if.if_flags = IFF_BROADCAST; | |
f1b2fa5b | 119 | es->es_if.if_init = eninit; |
b454c3ea | 120 | es->es_if.if_output = enoutput; |
f1b2fa5b | 121 | es->es_if.if_ubareset = enreset; |
d9c0644f | 122 | es->es_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16 | UBA_CANTWAIT; |
405c9168 | 123 | if_attach(&es->es_if); |
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, |
dc39362e | 156 | sizeof (struct en_header), (int)btoc(ENMRU)) == 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 | 169 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; |
dc39362e | 170 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
b454c3ea BJ |
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); | |
a13c006d | 176 | if_rtinit(&es->es_if, RTF_UP); |
11720282 BJ |
177 | } |
178 | ||
0658a645 | 179 | int enalldelay = 0; |
4c073c48 | 180 | int enlastdel = 50; |
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++; |
519a1ecf BJ |
263 | endocoll(unit); |
264 | return; | |
89413846 | 265 | } |
519a1ecf BJ |
266 | es->es_if.if_opackets++; |
267 | es->es_oactive = 0; | |
268 | es->es_delay = 0; | |
269 | es->es_mask = ~0; | |
7a66118b BJ |
270 | if (es->es_ifuba.ifu_xtofree) { |
271 | m_freem(es->es_ifuba.ifu_xtofree); | |
272 | es->es_ifuba.ifu_xtofree = 0; | |
273 | } | |
f1b2fa5b | 274 | if (es->es_if.if_snd.ifq_head == 0) { |
0658a645 | 275 | es->es_lastx = 256; /* putatively illegal */ |
11720282 BJ |
276 | return; |
277 | } | |
8a13b737 | 278 | enstart(unit); |
11720282 BJ |
279 | } |
280 | ||
f1b2fa5b BJ |
281 | /* |
282 | * Collision on ethernet interface. Do exponential | |
283 | * backoff, and retransmit. If have backed off all | |
ee787340 | 284 | * the way print warning diagnostic, and drop packet. |
f1b2fa5b | 285 | */ |
11720282 BJ |
286 | encollide(unit) |
287 | int unit; | |
288 | { | |
519a1ecf | 289 | struct en_softc *es = &en_softc[unit]; |
11720282 BJ |
290 | COUNT(ENCOLLIDE); |
291 | ||
f1b2fa5b | 292 | es->es_if.if_collisions++; |
8a13b737 | 293 | if (es->es_oactive == 0) |
11720282 | 294 | return; |
519a1ecf BJ |
295 | endocoll(unit); |
296 | } | |
297 | ||
298 | endocoll(unit) | |
299 | int unit; | |
300 | { | |
301 | register struct en_softc *es = &en_softc[unit]; | |
302 | ||
b454c3ea BJ |
303 | /* |
304 | * Es_mask is a 16 bit number with n low zero bits, with | |
305 | * n the number of backoffs. When es_mask is 0 we have | |
306 | * backed off 16 times, and give up. | |
307 | */ | |
8a13b737 | 308 | if (es->es_mask == 0) { |
a453e1b5 | 309 | printf("en%d: send error\n", unit); |
8a13b737 | 310 | enxint(unit); |
b454c3ea | 311 | return; |
11720282 | 312 | } |
b454c3ea BJ |
313 | /* |
314 | * Another backoff. Restart with delay based on n low bits | |
315 | * of the interval timer. | |
316 | */ | |
317 | es->es_mask <<= 1; | |
318 | es->es_delay = mfpr(ICR) &~ es->es_mask; | |
319 | enstart(unit); | |
11720282 BJ |
320 | } |
321 | ||
31c2345c SL |
322 | struct sockaddr_pup pupsrc = { AF_PUP }; |
323 | struct sockaddr_pup pupdst = { AF_PUP }; | |
324 | struct sockproto pupproto = { PF_PUP }; | |
f1b2fa5b BJ |
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 | */ | |
11720282 BJ |
334 | enrint(unit) |
335 | int unit; | |
336 | { | |
b454c3ea BJ |
337 | register struct en_softc *es = &en_softc[unit]; |
338 | struct endevice *addr = (struct endevice *)eninfo[unit]->ui_addr; | |
339 | register struct en_header *en; | |
8a13b737 | 340 | struct mbuf *m; |
0658a645 | 341 | int len, plen; short resid; |
b454c3ea | 342 | register struct ifqueue *inq; |
8a13b737 | 343 | int off; |
11720282 BJ |
344 | COUNT(ENRINT); |
345 | ||
b454c3ea | 346 | es->es_if.if_ipackets++; |
f1b2fa5b BJ |
347 | |
348 | /* | |
b454c3ea | 349 | * Purge BDP; drop if input error indicated. |
f1b2fa5b | 350 | */ |
ee787340 SL |
351 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
352 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_r.ifrw_bdp); | |
941ee7ef | 353 | if (addr->en_istat&EN_IERROR) { |
f1b2fa5b | 354 | es->es_if.if_ierrors++; |
8a13b737 | 355 | goto setup; |
11720282 | 356 | } |
f1b2fa5b BJ |
357 | |
358 | /* | |
0658a645 | 359 | * Calculate input data length. |
f1b2fa5b BJ |
360 | * Get pointer to ethernet header (in input buffer). |
361 | * Deal with trailer protocol: if type is PUP trailer | |
362 | * get true type from first 16-bit word past data. | |
363 | * Remember that type was trailer by setting off. | |
364 | */ | |
0658a645 BJ |
365 | resid = addr->en_iwc; |
366 | if (resid) | |
367 | resid |= 0176000; | |
dc39362e | 368 | len = (((sizeof (struct en_header) + ENMRU) >> 1) + resid) << 1; |
0658a645 | 369 | len -= sizeof (struct en_header); |
dc39362e | 370 | if (len > ENMRU) |
0658a645 | 371 | goto setup; /* sanity */ |
f1b2fa5b | 372 | en = (struct en_header *)(es->es_ifuba.ifu_r.ifrw_addr); |
8a13b737 BJ |
373 | #define endataaddr(en, off, type) ((type)(((caddr_t)((en)+1)+(off)))) |
374 | if (en->en_type >= ENPUP_TRAIL && | |
375 | en->en_type < ENPUP_TRAIL+ENPUP_NTRAILER) { | |
376 | off = (en->en_type - ENPUP_TRAIL) * 512; | |
dc39362e | 377 | if (off > ENMTU) |
b454c3ea | 378 | goto setup; /* sanity */ |
8a13b737 | 379 | en->en_type = *endataaddr(en, off, u_short *); |
0658a645 BJ |
380 | resid = *(endataaddr(en, off+2, u_short *)); |
381 | if (off + resid > len) | |
382 | goto setup; /* sanity */ | |
383 | len = off + resid; | |
8a13b737 BJ |
384 | } else |
385 | off = 0; | |
8a13b737 BJ |
386 | if (len == 0) |
387 | goto setup; | |
f1b2fa5b BJ |
388 | /* |
389 | * Pull packet off interface. Off is nonzero if packet | |
390 | * has trailing header; if_rubaget will then force this header | |
391 | * information to be at the front, but we still have to drop | |
0658a645 | 392 | * the type and length which are at the front of any trailer data. |
f1b2fa5b BJ |
393 | */ |
394 | m = if_rubaget(&es->es_ifuba, len, off); | |
a453e1b5 BJ |
395 | if (m == 0) |
396 | goto setup; | |
f1b2fa5b | 397 | if (off) { |
0658a645 BJ |
398 | m->m_off += 2 * sizeof (u_short); |
399 | m->m_len -= 2 * sizeof (u_short); | |
f1b2fa5b | 400 | } |
31c2345c SL |
401 | switch (en->en_type) { |
402 | ||
403 | #ifdef INET | |
404 | case ENPUP_IPTYPE: | |
9c8692e9 | 405 | schednetisr(NETISR_IP); |
31c2345c SL |
406 | inq = &ipintrq; |
407 | break; | |
408 | #endif | |
ee787340 | 409 | #ifdef PUP |
31c2345c SL |
410 | case ENPUP_PUPTYPE: { |
411 | struct pup_header *pup = mtod(m, struct pup_header *); | |
412 | ||
413 | pupproto.sp_protocol = pup->pup_type; | |
414 | pupdst.spup_addr = pup->pup_dport; | |
415 | pupsrc.spup_addr = pup->pup_sport; | |
57aa3090 SL |
416 | raw_input(m, &pupproto, (struct sockaddr *)&pupsrc, |
417 | (struct sockaddr *)&pupdst); | |
31c2345c | 418 | goto setup; |
31c2345c | 419 | } |
ee787340 | 420 | #endif |
c8f8184f BJ |
421 | default: |
422 | m_freem(m); | |
423 | goto setup; | |
ee787340 SL |
424 | } |
425 | ||
1e977657 BJ |
426 | if (IF_QFULL(inq)) { |
427 | IF_DROP(inq); | |
ee787340 | 428 | m_freem(m); |
1e977657 BJ |
429 | } else |
430 | IF_ENQUEUE(inq, m); | |
f1b2fa5b | 431 | |
ae348eea | 432 | setup: |
f1b2fa5b BJ |
433 | /* |
434 | * Reset for next packet. | |
435 | */ | |
436 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; | |
dc39362e | 437 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
941ee7ef | 438 | addr->en_istat = EN_IEN|EN_GO; |
ae348eea | 439 | } |
11720282 | 440 | |
8a13b737 BJ |
441 | /* |
442 | * Ethernet output routine. | |
443 | * Encapsulate a packet of type family for the local net. | |
f1b2fa5b BJ |
444 | * Use trailer local net encapsulation if enough data in first |
445 | * packet leaves a multiple of 512 bytes of data in remainder. | |
8a13b737 | 446 | */ |
ee787340 | 447 | enoutput(ifp, m0, dst) |
8a13b737 BJ |
448 | struct ifnet *ifp; |
449 | struct mbuf *m0; | |
ee787340 | 450 | struct sockaddr *dst; |
11720282 | 451 | { |
8a2f82db | 452 | int type, dest, s, error; |
f1b2fa5b | 453 | register struct mbuf *m = m0; |
8a13b737 | 454 | register struct en_header *en; |
ee787340 | 455 | register int off; |
8a13b737 | 456 | |
9d1b03e0 | 457 | COUNT(ENOUTPUT); |
ee787340 | 458 | switch (dst->sa_family) { |
11720282 | 459 | |
8a13b737 | 460 | #ifdef INET |
ee787340 | 461 | case AF_INET: |
4e818526 | 462 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
8a2f82db SL |
463 | if (dest & 0x00ffff00) { |
464 | error = EPERM; /* ??? */ | |
3734056d | 465 | goto bad; |
8a2f82db | 466 | } |
4e818526 | 467 | dest = (dest >> 24) & 0xff; |
ee787340 SL |
468 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
469 | if (off > 0 && (off & 0x1ff) == 0 && | |
0658a645 | 470 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { |
8a13b737 | 471 | type = ENPUP_TRAIL + (off>>9); |
0658a645 BJ |
472 | m->m_off -= 2 * sizeof (u_short); |
473 | m->m_len += 2 * sizeof (u_short); | |
f1b2fa5b | 474 | *mtod(m, u_short *) = ENPUP_IPTYPE; |
0658a645 | 475 | *(mtod(m, u_short *) + 1) = m->m_len; |
f1b2fa5b | 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; | |
31c2345c SL |
485 | type = ENPUP_PUPTYPE; |
486 | off = 0; | |
487 | goto gottype; | |
31c2345c | 488 | #endif |
8a13b737 BJ |
489 | |
490 | default: | |
ee787340 SL |
491 | printf("en%d: can't handle af%d\n", ifp->if_unit, |
492 | dst->sa_family); | |
8a2f82db SL |
493 | error = EAFNOSUPPORT; |
494 | goto bad; | |
8a13b737 | 495 | } |
f1b2fa5b | 496 | |
b454c3ea | 497 | gottrailertype: |
f1b2fa5b BJ |
498 | /* |
499 | * Packet to be sent as trailer: move first packet | |
500 | * (control information) to end of chain. | |
501 | */ | |
f1b2fa5b BJ |
502 | while (m->m_next) |
503 | m = m->m_next; | |
504 | m->m_next = m0; | |
505 | m = m0->m_next; | |
506 | m0->m_next = 0; | |
b454c3ea | 507 | m0 = m; |
f1b2fa5b | 508 | |
b454c3ea | 509 | gottype: |
f1b2fa5b BJ |
510 | /* |
511 | * Add local net header. If no space in first mbuf, | |
512 | * allocate another. | |
513 | */ | |
a453e1b5 BJ |
514 | if (m->m_off > MMAXOFF || |
515 | MMINOFF + sizeof (struct en_header) > m->m_off) { | |
ef9b4258 | 516 | m = m_get(M_DONTWAIT); |
8a13b737 | 517 | if (m == 0) { |
8a2f82db SL |
518 | error = ENOBUFS; |
519 | goto bad; | |
8a13b737 BJ |
520 | } |
521 | m->m_next = m0; | |
522 | m->m_off = MMINOFF; | |
523 | m->m_len = sizeof (struct en_header); | |
524 | } else { | |
8a13b737 BJ |
525 | m->m_off -= sizeof (struct en_header); |
526 | m->m_len += sizeof (struct en_header); | |
11720282 | 527 | } |
8a13b737 BJ |
528 | en = mtod(m, struct en_header *); |
529 | en->en_shost = ifp->if_host[0]; | |
530 | en->en_dhost = dest; | |
531 | en->en_type = type; | |
f1b2fa5b BJ |
532 | |
533 | /* | |
534 | * Queue message on interface, and start output if interface | |
535 | * not yet active. | |
536 | */ | |
8a13b737 | 537 | s = splimp(); |
1e977657 BJ |
538 | if (IF_QFULL(&ifp->if_snd)) { |
539 | IF_DROP(&ifp->if_snd); | |
8a2f82db SL |
540 | error = ENOBUFS; |
541 | goto qfull; | |
1e977657 | 542 | } |
8a13b737 | 543 | IF_ENQUEUE(&ifp->if_snd, m); |
8a13b737 BJ |
544 | if (en_softc[ifp->if_unit].es_oactive == 0) |
545 | enstart(ifp->if_unit); | |
89413846 | 546 | splx(s); |
4e818526 | 547 | return (0); |
8a2f82db SL |
548 | qfull: |
549 | m0 = m; | |
550 | splx(s); | |
551 | bad: | |
552 | m_freem(m0); | |
553 | return (error); | |
11720282 | 554 | } |