Commit | Line | Data |
---|---|---|
961945a8 | 1 | /* if_en.c 4.75 82/12/17 */ |
11720282 BJ |
2 | |
3 | #include "en.h" | |
f1b2fa5b | 4 | |
11720282 | 5 | /* |
f1b2fa5b | 6 | * Xerox prototype (3 Mb) Ethernet interface driver. |
11720282 | 7 | */ |
961945a8 | 8 | #include "../machine/pte.h" |
11720282 BJ |
9 | |
10 | #include "../h/param.h" | |
11 | #include "../h/systm.h" | |
12 | #include "../h/mbuf.h" | |
11720282 | 13 | #include "../h/buf.h" |
8a13b737 BJ |
14 | #include "../h/protosw.h" |
15 | #include "../h/socket.h" | |
8a13b737 | 16 | #include "../h/vmmac.h" |
eaa60542 BJ |
17 | #include <errno.h> |
18 | ||
19 | #include "../net/if.h" | |
20 | #include "../net/netisr.h" | |
21 | #include "../net/route.h" | |
d2cc167c BJ |
22 | #include "../netinet/in.h" |
23 | #include "../netinet/in_systm.h" | |
d2cc167c BJ |
24 | #include "../netinet/ip.h" |
25 | #include "../netinet/ip_var.h" | |
26 | #include "../netpup/pup.h" | |
eaa60542 BJ |
27 | |
28 | #include "../vax/cpu.h" | |
29 | #include "../vax/mtpr.h" | |
30 | #include "../vaxif/if_en.h" | |
31 | #include "../vaxif/if_enreg.h" | |
32 | #include "../vaxif/if_uba.h" | |
33 | #include "../vaxuba/ubareg.h" | |
34 | #include "../vaxuba/ubavar.h" | |
8a13b737 | 35 | |
a453e1b5 | 36 | #define ENMTU (1024+512) |
dc39362e | 37 | #define ENMRU (1024+512+16) /* 16 is enough to receive trailer */ |
11720282 | 38 | |
11720282 BJ |
39 | int enprobe(), enattach(), enrint(), enxint(), encollide(); |
40 | struct uba_device *eninfo[NEN]; | |
41 | u_short enstd[] = { 0 }; | |
42 | struct uba_driver endriver = | |
b454c3ea | 43 | { enprobe, 0, enattach, 0, enstd, "en", eninfo }; |
11720282 BJ |
44 | #define ENUNIT(x) minor(x) |
45 | ||
f1b2fa5b BJ |
46 | int eninit(),enoutput(),enreset(); |
47 | ||
48 | /* | |
49 | * Ethernet software status per interface. | |
50 | * | |
51 | * Each interface is referenced by a network interface structure, | |
52 | * es_if, which the routing code uses to locate the interface. | |
53 | * This structure contains the output queue for the interface, its address, ... | |
54 | * We also have, for each interface, a UBA interface structure, which | |
55 | * contains information about the UNIBUS resources held by the interface: | |
56 | * map registers, buffered data paths, etc. Information is cached in this | |
57 | * structure for use by the if_uba.c routines in running the interface | |
58 | * efficiently. | |
59 | */ | |
8a13b737 | 60 | struct en_softc { |
f1b2fa5b BJ |
61 | struct ifnet es_if; /* network-visible interface */ |
62 | struct ifuba es_ifuba; /* UNIBUS resources */ | |
63 | short es_delay; /* current output delay */ | |
64 | short es_mask; /* mask for current output delay */ | |
0658a645 | 65 | short es_lastx; /* host last transmitted to */ |
f1b2fa5b BJ |
66 | short es_oactive; /* is output active? */ |
67 | short es_olen; /* length of last output */ | |
8a13b737 | 68 | } en_softc[NEN]; |
11720282 | 69 | |
f1b2fa5b BJ |
70 | /* |
71 | * Do output DMA to determine interface presence and | |
72 | * interrupt vector. DMA is too short to disturb other hosts. | |
73 | */ | |
11720282 BJ |
74 | enprobe(reg) |
75 | caddr_t reg; | |
76 | { | |
b454c3ea | 77 | register int br, cvec; /* r11, r10 value-result */ |
11720282 BJ |
78 | register struct endevice *addr = (struct endevice *)reg; |
79 | ||
80 | #ifdef lint | |
81 | br = 0; cvec = br; br = cvec; | |
2b4b57cd | 82 | enrint(0); enxint(0); encollide(0); |
11720282 | 83 | #endif |
11720282 | 84 | addr->en_istat = 0; |
11720282 BJ |
85 | addr->en_owc = -1; |
86 | addr->en_oba = 0; | |
941ee7ef | 87 | addr->en_ostat = EN_IEN|EN_GO; |
11720282 BJ |
88 | DELAY(100000); |
89 | addr->en_ostat = 0; | |
7d6f1cd5 SL |
90 | #ifdef ECHACK |
91 | br = 0x16; | |
92 | #endif | |
11720282 BJ |
93 | return (1); |
94 | } | |
95 | ||
f1b2fa5b BJ |
96 | /* |
97 | * Interface exists: make available by filling in network interface | |
98 | * record. System will initialize the interface when it is ready | |
99 | * to accept packets. | |
100 | */ | |
11720282 BJ |
101 | enattach(ui) |
102 | struct uba_device *ui; | |
103 | { | |
f1b2fa5b | 104 | register struct en_softc *es = &en_softc[ui->ui_unit]; |
ee787340 | 105 | register struct sockaddr_in *sin; |
f1b2fa5b BJ |
106 | |
107 | es->es_if.if_unit = ui->ui_unit; | |
b454c3ea | 108 | es->es_if.if_name = "en"; |
f1b2fa5b | 109 | es->es_if.if_mtu = ENMTU; |
6187f8f4 | 110 | es->es_if.if_net = ui->ui_flags; |
f1b2fa5b | 111 | es->es_if.if_host[0] = |
ee787340 SL |
112 | (~(((struct endevice *)eninfo[ui->ui_unit]->ui_addr)->en_addr)) & 0xff; |
113 | sin = (struct sockaddr_in *)&es->es_if.if_addr; | |
114 | sin->sin_family = AF_INET; | |
115 | sin->sin_addr = if_makeaddr(es->es_if.if_net, es->es_if.if_host[0]); | |
116 | sin = (struct sockaddr_in *)&es->es_if.if_broadaddr; | |
117 | sin->sin_family = AF_INET; | |
118 | sin->sin_addr = if_makeaddr(es->es_if.if_net, 0); | |
119 | es->es_if.if_flags = IFF_BROADCAST; | |
f1b2fa5b | 120 | es->es_if.if_init = eninit; |
b454c3ea | 121 | es->es_if.if_output = enoutput; |
51595ca2 | 122 | es->es_if.if_reset = enreset; |
d9c0644f | 123 | es->es_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16 | UBA_CANTWAIT; |
b4e3e570 SL |
124 | #if defined(VAX750) |
125 | /* don't chew up 750 bdp's */ | |
126 | if (cpu == VAX_750 && ui->ui_unit > 0) | |
127 | es->es_ifuba.ifu_flags &= ~UBA_NEEDBDP; | |
128 | #endif | |
405c9168 | 129 | if_attach(&es->es_if); |
11720282 BJ |
130 | } |
131 | ||
f1b2fa5b BJ |
132 | /* |
133 | * Reset of interface after UNIBUS reset. | |
134 | * If interface is on specified uba, reset its state. | |
135 | */ | |
136 | enreset(unit, uban) | |
137 | int unit, uban; | |
8a13b737 | 138 | { |
11720282 | 139 | register struct uba_device *ui; |
11720282 | 140 | |
b454c3ea BJ |
141 | if (unit >= NEN || (ui = eninfo[unit]) == 0 || ui->ui_alive == 0 || |
142 | ui->ui_ubanum != uban) | |
f1b2fa5b | 143 | return; |
b454c3ea | 144 | printf(" en%d", unit); |
f1b2fa5b BJ |
145 | eninit(unit); |
146 | } | |
147 | ||
148 | /* | |
149 | * Initialization of interface; clear recorded pending | |
150 | * operations, and reinitialize UNIBUS usage. | |
151 | */ | |
152 | eninit(unit) | |
153 | int unit; | |
154 | { | |
b454c3ea BJ |
155 | register struct en_softc *es = &en_softc[unit]; |
156 | register struct uba_device *ui = eninfo[unit]; | |
f1b2fa5b | 157 | register struct endevice *addr; |
f1b2fa5b BJ |
158 | int s; |
159 | ||
f1b2fa5b | 160 | if (if_ubainit(&es->es_ifuba, ui->ui_ubanum, |
dc39362e | 161 | sizeof (struct en_header), (int)btoc(ENMRU)) == 0) { |
b454c3ea | 162 | printf("en%d: can't initialize\n", unit); |
ee787340 | 163 | es->es_if.if_flags &= ~IFF_UP; |
8a13b737 | 164 | return; |
11720282 | 165 | } |
11720282 | 166 | addr = (struct endevice *)ui->ui_addr; |
8a13b737 | 167 | addr->en_istat = addr->en_ostat = 0; |
11720282 | 168 | |
f1b2fa5b | 169 | /* |
b454c3ea BJ |
170 | * Hang a receive and start any |
171 | * pending writes by faking a transmit complete. | |
f1b2fa5b BJ |
172 | */ |
173 | s = splimp(); | |
b454c3ea | 174 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; |
dc39362e | 175 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
b454c3ea BJ |
176 | addr->en_istat = EN_IEN|EN_GO; |
177 | es->es_oactive = 1; | |
ee787340 | 178 | es->es_if.if_flags |= IFF_UP; |
f1b2fa5b BJ |
179 | enxint(unit); |
180 | splx(s); | |
a13c006d | 181 | if_rtinit(&es->es_if, RTF_UP); |
11720282 BJ |
182 | } |
183 | ||
0658a645 | 184 | int enalldelay = 0; |
4c073c48 | 185 | int enlastdel = 50; |
0658a645 | 186 | int enlastmask = (~0) << 5; |
8a13b737 | 187 | |
f1b2fa5b BJ |
188 | /* |
189 | * Start or restart output on interface. | |
190 | * If interface is already active, then this is a retransmit | |
191 | * after a collision, and just restuff registers and delay. | |
192 | * If interface is not already active, get another datagram | |
193 | * to send off of the interface queue, and map it to the interface | |
194 | * before starting the output. | |
195 | */ | |
ae348eea | 196 | enstart(dev) |
11720282 BJ |
197 | dev_t dev; |
198 | { | |
b454c3ea BJ |
199 | int unit = ENUNIT(dev); |
200 | struct uba_device *ui = eninfo[unit]; | |
201 | register struct en_softc *es = &en_softc[unit]; | |
8a13b737 | 202 | register struct endevice *addr; |
8a13b737 BJ |
203 | struct mbuf *m; |
204 | int dest; | |
11720282 | 205 | |
8a13b737 BJ |
206 | if (es->es_oactive) |
207 | goto restart; | |
f1b2fa5b BJ |
208 | |
209 | /* | |
210 | * Not already active: dequeue another request | |
211 | * and map it to the UNIBUS. If no more requests, | |
212 | * just return. | |
213 | */ | |
214 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
8a13b737 BJ |
215 | if (m == 0) { |
216 | es->es_oactive = 0; | |
11720282 BJ |
217 | return; |
218 | } | |
a453e1b5 | 219 | dest = mtod(m, struct en_header *)->en_dhost; |
8a13b737 | 220 | es->es_olen = if_wubaput(&es->es_ifuba, m); |
f1b2fa5b BJ |
221 | |
222 | /* | |
223 | * Ethernet cannot take back-to-back packets (no | |
0658a645 BJ |
224 | * buffering in interface. To help avoid overrunning |
225 | * receivers, enforce a small delay (about 1ms) in interface: | |
226 | * * between all packets when enalldelay | |
227 | * * whenever last packet was broadcast | |
228 | * * whenever this packet is to same host as last packet | |
f1b2fa5b | 229 | */ |
0658a645 | 230 | if (enalldelay || es->es_lastx == 0 || es->es_lastx == dest) { |
8a13b737 | 231 | es->es_delay = enlastdel; |
0658a645 BJ |
232 | es->es_mask = enlastmask; |
233 | } | |
234 | es->es_lastx = dest; | |
f1b2fa5b | 235 | |
8a13b737 | 236 | restart: |
f1b2fa5b BJ |
237 | /* |
238 | * Have request mapped to UNIBUS for transmission. | |
239 | * Purge any stale data from this BDP, and start the otput. | |
240 | */ | |
ee787340 SL |
241 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
242 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_w.ifrw_bdp); | |
11720282 | 243 | addr = (struct endevice *)ui->ui_addr; |
405c9168 | 244 | addr->en_oba = (int)es->es_ifuba.ifu_w.ifrw_info; |
8a13b737 BJ |
245 | addr->en_odelay = es->es_delay; |
246 | addr->en_owc = -((es->es_olen + 1) >> 1); | |
941ee7ef | 247 | addr->en_ostat = EN_IEN|EN_GO; |
8a13b737 | 248 | es->es_oactive = 1; |
11720282 BJ |
249 | } |
250 | ||
f1b2fa5b BJ |
251 | /* |
252 | * Ethernet interface transmitter interrupt. | |
253 | * Start another output if more data to send. | |
254 | */ | |
11720282 BJ |
255 | enxint(unit) |
256 | int unit; | |
257 | { | |
b454c3ea BJ |
258 | register struct uba_device *ui = eninfo[unit]; |
259 | register struct en_softc *es = &en_softc[unit]; | |
519a1ecf | 260 | register struct endevice *addr = (struct endevice *)ui->ui_addr; |
11720282 | 261 | |
8a13b737 BJ |
262 | if (es->es_oactive == 0) |
263 | return; | |
519a1ecf | 264 | if (es->es_mask && (addr->en_ostat&EN_OERROR)) { |
89413846 | 265 | es->es_if.if_oerrors++; |
519a1ecf BJ |
266 | endocoll(unit); |
267 | return; | |
89413846 | 268 | } |
519a1ecf BJ |
269 | es->es_if.if_opackets++; |
270 | es->es_oactive = 0; | |
271 | es->es_delay = 0; | |
272 | es->es_mask = ~0; | |
7a66118b BJ |
273 | if (es->es_ifuba.ifu_xtofree) { |
274 | m_freem(es->es_ifuba.ifu_xtofree); | |
275 | es->es_ifuba.ifu_xtofree = 0; | |
276 | } | |
f1b2fa5b | 277 | if (es->es_if.if_snd.ifq_head == 0) { |
0658a645 | 278 | es->es_lastx = 256; /* putatively illegal */ |
11720282 BJ |
279 | return; |
280 | } | |
8a13b737 | 281 | enstart(unit); |
11720282 BJ |
282 | } |
283 | ||
f1b2fa5b BJ |
284 | /* |
285 | * Collision on ethernet interface. Do exponential | |
286 | * backoff, and retransmit. If have backed off all | |
ee787340 | 287 | * the way print warning diagnostic, and drop packet. |
f1b2fa5b | 288 | */ |
11720282 BJ |
289 | encollide(unit) |
290 | int unit; | |
291 | { | |
519a1ecf | 292 | struct en_softc *es = &en_softc[unit]; |
11720282 | 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; |
038ee561 | 343 | int len; short resid; |
b454c3ea | 344 | register struct ifqueue *inq; |
8a13b737 | 345 | int off; |
11720282 | 346 | |
b454c3ea | 347 | es->es_if.if_ipackets++; |
f1b2fa5b BJ |
348 | |
349 | /* | |
b454c3ea | 350 | * Purge BDP; drop if input error indicated. |
f1b2fa5b | 351 | */ |
ee787340 SL |
352 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
353 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_r.ifrw_bdp); | |
941ee7ef | 354 | if (addr->en_istat&EN_IERROR) { |
f1b2fa5b | 355 | es->es_if.if_ierrors++; |
8a13b737 | 356 | goto setup; |
11720282 | 357 | } |
f1b2fa5b BJ |
358 | |
359 | /* | |
0658a645 | 360 | * Calculate input data length. |
f1b2fa5b BJ |
361 | * Get pointer to ethernet header (in input buffer). |
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 | */ | |
0658a645 BJ |
366 | resid = addr->en_iwc; |
367 | if (resid) | |
368 | resid |= 0176000; | |
dc39362e | 369 | len = (((sizeof (struct en_header) + ENMRU) >> 1) + resid) << 1; |
0658a645 | 370 | len -= sizeof (struct en_header); |
dc39362e | 371 | if (len > ENMRU) |
0658a645 | 372 | goto setup; /* sanity */ |
f1b2fa5b | 373 | en = (struct en_header *)(es->es_ifuba.ifu_r.ifrw_addr); |
8a13b737 BJ |
374 | #define endataaddr(en, off, type) ((type)(((caddr_t)((en)+1)+(off)))) |
375 | if (en->en_type >= ENPUP_TRAIL && | |
376 | en->en_type < ENPUP_TRAIL+ENPUP_NTRAILER) { | |
377 | off = (en->en_type - ENPUP_TRAIL) * 512; | |
dc39362e | 378 | if (off > ENMTU) |
b454c3ea | 379 | goto setup; /* sanity */ |
8a13b737 | 380 | en->en_type = *endataaddr(en, off, u_short *); |
0658a645 BJ |
381 | resid = *(endataaddr(en, off+2, u_short *)); |
382 | if (off + resid > len) | |
383 | goto setup; /* sanity */ | |
384 | len = off + resid; | |
8a13b737 BJ |
385 | } else |
386 | off = 0; | |
8a13b737 BJ |
387 | if (len == 0) |
388 | goto setup; | |
f1b2fa5b BJ |
389 | /* |
390 | * Pull packet off interface. Off is nonzero if packet | |
391 | * has trailing header; if_rubaget will then force this header | |
392 | * information to be at the front, but we still have to drop | |
0658a645 | 393 | * the type and length which are at the front of any trailer data. |
f1b2fa5b BJ |
394 | */ |
395 | m = if_rubaget(&es->es_ifuba, len, off); | |
a453e1b5 BJ |
396 | if (m == 0) |
397 | goto setup; | |
f1b2fa5b | 398 | if (off) { |
0658a645 BJ |
399 | m->m_off += 2 * sizeof (u_short); |
400 | m->m_len -= 2 * sizeof (u_short); | |
f1b2fa5b | 401 | } |
31c2345c SL |
402 | switch (en->en_type) { |
403 | ||
404 | #ifdef INET | |
405 | case ENPUP_IPTYPE: | |
9c8692e9 | 406 | schednetisr(NETISR_IP); |
31c2345c SL |
407 | inq = &ipintrq; |
408 | break; | |
409 | #endif | |
ee787340 | 410 | #ifdef PUP |
31c2345c SL |
411 | case ENPUP_PUPTYPE: { |
412 | struct pup_header *pup = mtod(m, struct pup_header *); | |
413 | ||
414 | pupproto.sp_protocol = pup->pup_type; | |
415 | pupdst.spup_addr = pup->pup_dport; | |
416 | pupsrc.spup_addr = pup->pup_sport; | |
57aa3090 SL |
417 | raw_input(m, &pupproto, (struct sockaddr *)&pupsrc, |
418 | (struct sockaddr *)&pupdst); | |
31c2345c | 419 | goto setup; |
31c2345c | 420 | } |
ee787340 | 421 | #endif |
c8f8184f BJ |
422 | default: |
423 | m_freem(m); | |
424 | goto setup; | |
ee787340 SL |
425 | } |
426 | ||
1e977657 BJ |
427 | if (IF_QFULL(inq)) { |
428 | IF_DROP(inq); | |
ee787340 | 429 | m_freem(m); |
1e977657 BJ |
430 | } else |
431 | IF_ENQUEUE(inq, m); | |
f1b2fa5b | 432 | |
ae348eea | 433 | setup: |
f1b2fa5b BJ |
434 | /* |
435 | * Reset for next packet. | |
436 | */ | |
437 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; | |
dc39362e | 438 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
941ee7ef | 439 | addr->en_istat = EN_IEN|EN_GO; |
ae348eea | 440 | } |
11720282 | 441 | |
8a13b737 BJ |
442 | /* |
443 | * Ethernet output routine. | |
444 | * Encapsulate a packet of type family for the local net. | |
f1b2fa5b BJ |
445 | * Use trailer local net encapsulation if enough data in first |
446 | * packet leaves a multiple of 512 bytes of data in remainder. | |
8a13b737 | 447 | */ |
ee787340 | 448 | enoutput(ifp, m0, dst) |
8a13b737 BJ |
449 | struct ifnet *ifp; |
450 | struct mbuf *m0; | |
ee787340 | 451 | struct sockaddr *dst; |
11720282 | 452 | { |
8a2f82db | 453 | int type, dest, s, error; |
f1b2fa5b | 454 | register struct mbuf *m = m0; |
8a13b737 | 455 | register struct en_header *en; |
ee787340 | 456 | register int off; |
8a13b737 | 457 | |
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; |
4fce3bf9 | 463 | if (in_lnaof(*((struct in_addr *)&dest)) >= 0x100) { |
8a2f82db | 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) { | |
cce93e4b | 516 | m = m_get(M_DONTWAIT, MT_HEADER); |
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 | } |