Commit | Line | Data |
---|---|---|
d2cc167c | 1 | /* if_en.c 4.68 82/10/09 */ |
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" | |
d2cc167c BJ |
22 | #include "../netinet/in.h" |
23 | #include "../netinet/in_systm.h" | |
8a13b737 | 24 | #include "../net/if.h" |
d2cc167c BJ |
25 | #include "../vaxif/if_en.h" |
26 | #include "../vaxif/if_uba.h" | |
27 | #include "../netinet/ip.h" | |
28 | #include "../netinet/ip_var.h" | |
29 | #include "../netpup/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 | ||
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; | |
7d6f1cd5 SL |
87 | #ifdef ECHACK |
88 | br = 0x16; | |
89 | #endif | |
11720282 BJ |
90 | return (1); |
91 | } | |
92 | ||
f1b2fa5b BJ |
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. | |
97 | */ | |
11720282 BJ |
98 | enattach(ui) |
99 | struct uba_device *ui; | |
100 | { | |
f1b2fa5b | 101 | register struct en_softc *es = &en_softc[ui->ui_unit]; |
ee787340 | 102 | register struct sockaddr_in *sin; |
f1b2fa5b BJ |
103 | |
104 | es->es_if.if_unit = ui->ui_unit; | |
b454c3ea | 105 | es->es_if.if_name = "en"; |
f1b2fa5b | 106 | es->es_if.if_mtu = ENMTU; |
6187f8f4 | 107 | es->es_if.if_net = ui->ui_flags; |
f1b2fa5b | 108 | es->es_if.if_host[0] = |
ee787340 SL |
109 | (~(((struct endevice *)eninfo[ui->ui_unit]->ui_addr)->en_addr)) & 0xff; |
110 | sin = (struct sockaddr_in *)&es->es_if.if_addr; | |
111 | sin->sin_family = AF_INET; | |
112 | sin->sin_addr = if_makeaddr(es->es_if.if_net, es->es_if.if_host[0]); | |
113 | sin = (struct sockaddr_in *)&es->es_if.if_broadaddr; | |
114 | sin->sin_family = AF_INET; | |
115 | sin->sin_addr = if_makeaddr(es->es_if.if_net, 0); | |
116 | es->es_if.if_flags = IFF_BROADCAST; | |
f1b2fa5b | 117 | es->es_if.if_init = eninit; |
b454c3ea | 118 | es->es_if.if_output = enoutput; |
f1b2fa5b | 119 | es->es_if.if_ubareset = enreset; |
d9c0644f | 120 | es->es_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16 | UBA_CANTWAIT; |
405c9168 | 121 | if_attach(&es->es_if); |
11720282 BJ |
122 | } |
123 | ||
f1b2fa5b BJ |
124 | /* |
125 | * Reset of interface after UNIBUS reset. | |
126 | * If interface is on specified uba, reset its state. | |
127 | */ | |
128 | enreset(unit, uban) | |
129 | int unit, uban; | |
8a13b737 | 130 | { |
11720282 | 131 | register struct uba_device *ui; |
11720282 | 132 | |
b454c3ea BJ |
133 | if (unit >= NEN || (ui = eninfo[unit]) == 0 || ui->ui_alive == 0 || |
134 | ui->ui_ubanum != uban) | |
f1b2fa5b | 135 | return; |
b454c3ea | 136 | printf(" en%d", unit); |
f1b2fa5b BJ |
137 | eninit(unit); |
138 | } | |
139 | ||
140 | /* | |
141 | * Initialization of interface; clear recorded pending | |
142 | * operations, and reinitialize UNIBUS usage. | |
143 | */ | |
144 | eninit(unit) | |
145 | int unit; | |
146 | { | |
b454c3ea BJ |
147 | register struct en_softc *es = &en_softc[unit]; |
148 | register struct uba_device *ui = eninfo[unit]; | |
f1b2fa5b | 149 | register struct endevice *addr; |
f1b2fa5b BJ |
150 | int s; |
151 | ||
f1b2fa5b | 152 | if (if_ubainit(&es->es_ifuba, ui->ui_ubanum, |
dc39362e | 153 | sizeof (struct en_header), (int)btoc(ENMRU)) == 0) { |
b454c3ea | 154 | printf("en%d: can't initialize\n", unit); |
ee787340 | 155 | es->es_if.if_flags &= ~IFF_UP; |
8a13b737 | 156 | return; |
11720282 | 157 | } |
11720282 | 158 | addr = (struct endevice *)ui->ui_addr; |
8a13b737 | 159 | addr->en_istat = addr->en_ostat = 0; |
11720282 | 160 | |
f1b2fa5b | 161 | /* |
b454c3ea BJ |
162 | * Hang a receive and start any |
163 | * pending writes by faking a transmit complete. | |
f1b2fa5b BJ |
164 | */ |
165 | s = splimp(); | |
b454c3ea | 166 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; |
dc39362e | 167 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
b454c3ea BJ |
168 | addr->en_istat = EN_IEN|EN_GO; |
169 | es->es_oactive = 1; | |
ee787340 | 170 | es->es_if.if_flags |= IFF_UP; |
f1b2fa5b BJ |
171 | enxint(unit); |
172 | splx(s); | |
a13c006d | 173 | if_rtinit(&es->es_if, RTF_UP); |
11720282 BJ |
174 | } |
175 | ||
0658a645 | 176 | int enalldelay = 0; |
4c073c48 | 177 | int enlastdel = 50; |
0658a645 | 178 | int enlastmask = (~0) << 5; |
8a13b737 | 179 | |
f1b2fa5b BJ |
180 | /* |
181 | * Start or restart output on interface. | |
182 | * If interface is already active, then this is a retransmit | |
183 | * after a collision, and just restuff registers and delay. | |
184 | * If interface is not already active, get another datagram | |
185 | * to send off of the interface queue, and map it to the interface | |
186 | * before starting the output. | |
187 | */ | |
ae348eea | 188 | enstart(dev) |
11720282 BJ |
189 | dev_t dev; |
190 | { | |
b454c3ea BJ |
191 | int unit = ENUNIT(dev); |
192 | struct uba_device *ui = eninfo[unit]; | |
193 | register struct en_softc *es = &en_softc[unit]; | |
8a13b737 | 194 | register struct endevice *addr; |
8a13b737 BJ |
195 | struct mbuf *m; |
196 | int dest; | |
11720282 | 197 | |
8a13b737 BJ |
198 | if (es->es_oactive) |
199 | goto restart; | |
f1b2fa5b BJ |
200 | |
201 | /* | |
202 | * Not already active: dequeue another request | |
203 | * and map it to the UNIBUS. If no more requests, | |
204 | * just return. | |
205 | */ | |
206 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
8a13b737 BJ |
207 | if (m == 0) { |
208 | es->es_oactive = 0; | |
11720282 BJ |
209 | return; |
210 | } | |
a453e1b5 | 211 | dest = mtod(m, struct en_header *)->en_dhost; |
8a13b737 | 212 | es->es_olen = if_wubaput(&es->es_ifuba, m); |
f1b2fa5b BJ |
213 | |
214 | /* | |
215 | * Ethernet cannot take back-to-back packets (no | |
0658a645 BJ |
216 | * buffering in interface. To help avoid overrunning |
217 | * receivers, enforce a small delay (about 1ms) in interface: | |
218 | * * between all packets when enalldelay | |
219 | * * whenever last packet was broadcast | |
220 | * * whenever this packet is to same host as last packet | |
f1b2fa5b | 221 | */ |
0658a645 | 222 | if (enalldelay || es->es_lastx == 0 || es->es_lastx == dest) { |
8a13b737 | 223 | es->es_delay = enlastdel; |
0658a645 BJ |
224 | es->es_mask = enlastmask; |
225 | } | |
226 | es->es_lastx = dest; | |
f1b2fa5b | 227 | |
8a13b737 | 228 | restart: |
f1b2fa5b BJ |
229 | /* |
230 | * Have request mapped to UNIBUS for transmission. | |
231 | * Purge any stale data from this BDP, and start the otput. | |
232 | */ | |
ee787340 SL |
233 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
234 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_w.ifrw_bdp); | |
11720282 | 235 | addr = (struct endevice *)ui->ui_addr; |
405c9168 | 236 | addr->en_oba = (int)es->es_ifuba.ifu_w.ifrw_info; |
8a13b737 BJ |
237 | addr->en_odelay = es->es_delay; |
238 | addr->en_owc = -((es->es_olen + 1) >> 1); | |
941ee7ef | 239 | addr->en_ostat = EN_IEN|EN_GO; |
8a13b737 | 240 | es->es_oactive = 1; |
11720282 BJ |
241 | } |
242 | ||
f1b2fa5b BJ |
243 | /* |
244 | * Ethernet interface transmitter interrupt. | |
245 | * Start another output if more data to send. | |
246 | */ | |
11720282 BJ |
247 | enxint(unit) |
248 | int unit; | |
249 | { | |
b454c3ea BJ |
250 | register struct uba_device *ui = eninfo[unit]; |
251 | register struct en_softc *es = &en_softc[unit]; | |
519a1ecf | 252 | register struct endevice *addr = (struct endevice *)ui->ui_addr; |
11720282 | 253 | |
8a13b737 BJ |
254 | if (es->es_oactive == 0) |
255 | return; | |
519a1ecf | 256 | if (es->es_mask && (addr->en_ostat&EN_OERROR)) { |
89413846 | 257 | es->es_if.if_oerrors++; |
519a1ecf BJ |
258 | endocoll(unit); |
259 | return; | |
89413846 | 260 | } |
519a1ecf BJ |
261 | es->es_if.if_opackets++; |
262 | es->es_oactive = 0; | |
263 | es->es_delay = 0; | |
264 | es->es_mask = ~0; | |
7a66118b BJ |
265 | if (es->es_ifuba.ifu_xtofree) { |
266 | m_freem(es->es_ifuba.ifu_xtofree); | |
267 | es->es_ifuba.ifu_xtofree = 0; | |
268 | } | |
f1b2fa5b | 269 | if (es->es_if.if_snd.ifq_head == 0) { |
0658a645 | 270 | es->es_lastx = 256; /* putatively illegal */ |
11720282 BJ |
271 | return; |
272 | } | |
8a13b737 | 273 | enstart(unit); |
11720282 BJ |
274 | } |
275 | ||
f1b2fa5b BJ |
276 | /* |
277 | * Collision on ethernet interface. Do exponential | |
278 | * backoff, and retransmit. If have backed off all | |
ee787340 | 279 | * the way print warning diagnostic, and drop packet. |
f1b2fa5b | 280 | */ |
11720282 BJ |
281 | encollide(unit) |
282 | int unit; | |
283 | { | |
519a1ecf | 284 | struct en_softc *es = &en_softc[unit]; |
11720282 | 285 | |
f1b2fa5b | 286 | es->es_if.if_collisions++; |
8a13b737 | 287 | if (es->es_oactive == 0) |
11720282 | 288 | return; |
519a1ecf BJ |
289 | endocoll(unit); |
290 | } | |
291 | ||
292 | endocoll(unit) | |
293 | int unit; | |
294 | { | |
295 | register struct en_softc *es = &en_softc[unit]; | |
296 | ||
b454c3ea BJ |
297 | /* |
298 | * Es_mask is a 16 bit number with n low zero bits, with | |
299 | * n the number of backoffs. When es_mask is 0 we have | |
300 | * backed off 16 times, and give up. | |
301 | */ | |
8a13b737 | 302 | if (es->es_mask == 0) { |
a453e1b5 | 303 | printf("en%d: send error\n", unit); |
8a13b737 | 304 | enxint(unit); |
b454c3ea | 305 | return; |
11720282 | 306 | } |
b454c3ea BJ |
307 | /* |
308 | * Another backoff. Restart with delay based on n low bits | |
309 | * of the interval timer. | |
310 | */ | |
311 | es->es_mask <<= 1; | |
312 | es->es_delay = mfpr(ICR) &~ es->es_mask; | |
313 | enstart(unit); | |
11720282 BJ |
314 | } |
315 | ||
31c2345c SL |
316 | struct sockaddr_pup pupsrc = { AF_PUP }; |
317 | struct sockaddr_pup pupdst = { AF_PUP }; | |
318 | struct sockproto pupproto = { PF_PUP }; | |
f1b2fa5b BJ |
319 | /* |
320 | * Ethernet interface receiver interrupt. | |
321 | * If input error just drop packet. | |
322 | * Otherwise purge input buffered data path and examine | |
323 | * packet to determine type. If can't determine length | |
324 | * from type, then have to drop packet. Othewise decapsulate | |
325 | * packet based on type and pass to type specific higher-level | |
326 | * input routine. | |
327 | */ | |
11720282 BJ |
328 | enrint(unit) |
329 | int unit; | |
330 | { | |
b454c3ea BJ |
331 | register struct en_softc *es = &en_softc[unit]; |
332 | struct endevice *addr = (struct endevice *)eninfo[unit]->ui_addr; | |
333 | register struct en_header *en; | |
8a13b737 | 334 | struct mbuf *m; |
0658a645 | 335 | int len, plen; short resid; |
b454c3ea | 336 | register struct ifqueue *inq; |
8a13b737 | 337 | int off; |
11720282 | 338 | |
b454c3ea | 339 | es->es_if.if_ipackets++; |
f1b2fa5b BJ |
340 | |
341 | /* | |
b454c3ea | 342 | * Purge BDP; drop if input error indicated. |
f1b2fa5b | 343 | */ |
ee787340 SL |
344 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
345 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_r.ifrw_bdp); | |
941ee7ef | 346 | if (addr->en_istat&EN_IERROR) { |
f1b2fa5b | 347 | es->es_if.if_ierrors++; |
8a13b737 | 348 | goto setup; |
11720282 | 349 | } |
f1b2fa5b BJ |
350 | |
351 | /* | |
0658a645 | 352 | * Calculate input data length. |
f1b2fa5b BJ |
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 | */ | |
0658a645 BJ |
358 | resid = addr->en_iwc; |
359 | if (resid) | |
360 | resid |= 0176000; | |
dc39362e | 361 | len = (((sizeof (struct en_header) + ENMRU) >> 1) + resid) << 1; |
0658a645 | 362 | len -= sizeof (struct en_header); |
dc39362e | 363 | if (len > ENMRU) |
0658a645 | 364 | goto setup; /* sanity */ |
f1b2fa5b | 365 | en = (struct en_header *)(es->es_ifuba.ifu_r.ifrw_addr); |
8a13b737 BJ |
366 | #define endataaddr(en, off, type) ((type)(((caddr_t)((en)+1)+(off)))) |
367 | if (en->en_type >= ENPUP_TRAIL && | |
368 | en->en_type < ENPUP_TRAIL+ENPUP_NTRAILER) { | |
369 | off = (en->en_type - ENPUP_TRAIL) * 512; | |
dc39362e | 370 | if (off > ENMTU) |
b454c3ea | 371 | goto setup; /* sanity */ |
8a13b737 | 372 | en->en_type = *endataaddr(en, off, u_short *); |
0658a645 BJ |
373 | resid = *(endataaddr(en, off+2, u_short *)); |
374 | if (off + resid > len) | |
375 | goto setup; /* sanity */ | |
376 | len = off + resid; | |
8a13b737 BJ |
377 | } else |
378 | off = 0; | |
8a13b737 BJ |
379 | if (len == 0) |
380 | goto setup; | |
f1b2fa5b BJ |
381 | /* |
382 | * Pull packet off interface. Off is nonzero if packet | |
383 | * has trailing header; if_rubaget will then force this header | |
384 | * information to be at the front, but we still have to drop | |
0658a645 | 385 | * the type and length which are at the front of any trailer data. |
f1b2fa5b BJ |
386 | */ |
387 | m = if_rubaget(&es->es_ifuba, len, off); | |
a453e1b5 BJ |
388 | if (m == 0) |
389 | goto setup; | |
f1b2fa5b | 390 | if (off) { |
0658a645 BJ |
391 | m->m_off += 2 * sizeof (u_short); |
392 | m->m_len -= 2 * sizeof (u_short); | |
f1b2fa5b | 393 | } |
31c2345c SL |
394 | switch (en->en_type) { |
395 | ||
396 | #ifdef INET | |
397 | case ENPUP_IPTYPE: | |
9c8692e9 | 398 | schednetisr(NETISR_IP); |
31c2345c SL |
399 | inq = &ipintrq; |
400 | break; | |
401 | #endif | |
ee787340 | 402 | #ifdef PUP |
31c2345c SL |
403 | case ENPUP_PUPTYPE: { |
404 | struct pup_header *pup = mtod(m, struct pup_header *); | |
405 | ||
406 | pupproto.sp_protocol = pup->pup_type; | |
407 | pupdst.spup_addr = pup->pup_dport; | |
408 | pupsrc.spup_addr = pup->pup_sport; | |
57aa3090 SL |
409 | raw_input(m, &pupproto, (struct sockaddr *)&pupsrc, |
410 | (struct sockaddr *)&pupdst); | |
31c2345c | 411 | goto setup; |
31c2345c | 412 | } |
ee787340 | 413 | #endif |
c8f8184f BJ |
414 | default: |
415 | m_freem(m); | |
416 | goto setup; | |
ee787340 SL |
417 | } |
418 | ||
1e977657 BJ |
419 | if (IF_QFULL(inq)) { |
420 | IF_DROP(inq); | |
ee787340 | 421 | m_freem(m); |
1e977657 BJ |
422 | } else |
423 | IF_ENQUEUE(inq, m); | |
f1b2fa5b | 424 | |
ae348eea | 425 | setup: |
f1b2fa5b BJ |
426 | /* |
427 | * Reset for next packet. | |
428 | */ | |
429 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; | |
dc39362e | 430 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
941ee7ef | 431 | addr->en_istat = EN_IEN|EN_GO; |
ae348eea | 432 | } |
11720282 | 433 | |
8a13b737 BJ |
434 | /* |
435 | * Ethernet output routine. | |
436 | * Encapsulate a packet of type family for the local net. | |
f1b2fa5b BJ |
437 | * Use trailer local net encapsulation if enough data in first |
438 | * packet leaves a multiple of 512 bytes of data in remainder. | |
8a13b737 | 439 | */ |
ee787340 | 440 | enoutput(ifp, m0, dst) |
8a13b737 BJ |
441 | struct ifnet *ifp; |
442 | struct mbuf *m0; | |
ee787340 | 443 | struct sockaddr *dst; |
11720282 | 444 | { |
8a2f82db | 445 | int type, dest, s, error; |
f1b2fa5b | 446 | register struct mbuf *m = m0; |
8a13b737 | 447 | register struct en_header *en; |
ee787340 | 448 | register int off; |
8a13b737 | 449 | |
ee787340 | 450 | switch (dst->sa_family) { |
11720282 | 451 | |
8a13b737 | 452 | #ifdef INET |
ee787340 | 453 | case AF_INET: |
4e818526 | 454 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
8a2f82db SL |
455 | if (dest & 0x00ffff00) { |
456 | error = EPERM; /* ??? */ | |
3734056d | 457 | goto bad; |
8a2f82db | 458 | } |
4e818526 | 459 | dest = (dest >> 24) & 0xff; |
ee787340 SL |
460 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
461 | if (off > 0 && (off & 0x1ff) == 0 && | |
0658a645 | 462 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { |
8a13b737 | 463 | type = ENPUP_TRAIL + (off>>9); |
0658a645 BJ |
464 | m->m_off -= 2 * sizeof (u_short); |
465 | m->m_len += 2 * sizeof (u_short); | |
f1b2fa5b | 466 | *mtod(m, u_short *) = ENPUP_IPTYPE; |
0658a645 | 467 | *(mtod(m, u_short *) + 1) = m->m_len; |
f1b2fa5b | 468 | goto gottrailertype; |
8a13b737 | 469 | } |
f1b2fa5b BJ |
470 | type = ENPUP_IPTYPE; |
471 | off = 0; | |
472 | goto gottype; | |
8a13b737 | 473 | #endif |
31c2345c | 474 | #ifdef PUP |
ee787340 SL |
475 | case AF_PUP: |
476 | dest = ((struct sockaddr_pup *)dst)->spup_addr.pp_host; | |
31c2345c SL |
477 | type = ENPUP_PUPTYPE; |
478 | off = 0; | |
479 | goto gottype; | |
31c2345c | 480 | #endif |
8a13b737 BJ |
481 | |
482 | default: | |
ee787340 SL |
483 | printf("en%d: can't handle af%d\n", ifp->if_unit, |
484 | dst->sa_family); | |
8a2f82db SL |
485 | error = EAFNOSUPPORT; |
486 | goto bad; | |
8a13b737 | 487 | } |
f1b2fa5b | 488 | |
b454c3ea | 489 | gottrailertype: |
f1b2fa5b BJ |
490 | /* |
491 | * Packet to be sent as trailer: move first packet | |
492 | * (control information) to end of chain. | |
493 | */ | |
f1b2fa5b BJ |
494 | while (m->m_next) |
495 | m = m->m_next; | |
496 | m->m_next = m0; | |
497 | m = m0->m_next; | |
498 | m0->m_next = 0; | |
b454c3ea | 499 | m0 = m; |
f1b2fa5b | 500 | |
b454c3ea | 501 | gottype: |
f1b2fa5b BJ |
502 | /* |
503 | * Add local net header. If no space in first mbuf, | |
504 | * allocate another. | |
505 | */ | |
a453e1b5 BJ |
506 | if (m->m_off > MMAXOFF || |
507 | MMINOFF + sizeof (struct en_header) > m->m_off) { | |
ef9b4258 | 508 | m = m_get(M_DONTWAIT); |
8a13b737 | 509 | if (m == 0) { |
8a2f82db SL |
510 | error = ENOBUFS; |
511 | goto bad; | |
8a13b737 BJ |
512 | } |
513 | m->m_next = m0; | |
514 | m->m_off = MMINOFF; | |
515 | m->m_len = sizeof (struct en_header); | |
516 | } else { | |
8a13b737 BJ |
517 | m->m_off -= sizeof (struct en_header); |
518 | m->m_len += sizeof (struct en_header); | |
11720282 | 519 | } |
8a13b737 BJ |
520 | en = mtod(m, struct en_header *); |
521 | en->en_shost = ifp->if_host[0]; | |
522 | en->en_dhost = dest; | |
523 | en->en_type = type; | |
f1b2fa5b BJ |
524 | |
525 | /* | |
526 | * Queue message on interface, and start output if interface | |
527 | * not yet active. | |
528 | */ | |
8a13b737 | 529 | s = splimp(); |
1e977657 BJ |
530 | if (IF_QFULL(&ifp->if_snd)) { |
531 | IF_DROP(&ifp->if_snd); | |
8a2f82db SL |
532 | error = ENOBUFS; |
533 | goto qfull; | |
1e977657 | 534 | } |
8a13b737 | 535 | IF_ENQUEUE(&ifp->if_snd, m); |
8a13b737 BJ |
536 | if (en_softc[ifp->if_unit].es_oactive == 0) |
537 | enstart(ifp->if_unit); | |
89413846 | 538 | splx(s); |
4e818526 | 539 | return (0); |
8a2f82db SL |
540 | qfull: |
541 | m0 = m; | |
542 | splx(s); | |
543 | bad: | |
544 | m_freem(m0); | |
545 | return (error); | |
11720282 | 546 | } |