Commit | Line | Data |
---|---|---|
f2853b65 | 1 | /* if_en.c 4.62 82/05/27 */ |
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" |
8a2f82db | 32 | #include <errno.h> |
8a13b737 | 33 | |
a453e1b5 | 34 | #define ENMTU (1024+512) |
dc39362e | 35 | #define ENMRU (1024+512+16) /* 16 is enough to receive trailer */ |
11720282 | 36 | |
11720282 BJ |
37 | int enprobe(), enattach(), enrint(), enxint(), encollide(); |
38 | struct uba_device *eninfo[NEN]; | |
39 | u_short enstd[] = { 0 }; | |
40 | struct uba_driver endriver = | |
b454c3ea | 41 | { enprobe, 0, enattach, 0, enstd, "en", eninfo }; |
11720282 BJ |
42 | #define ENUNIT(x) minor(x) |
43 | ||
f1b2fa5b BJ |
44 | int eninit(),enoutput(),enreset(); |
45 | ||
46 | /* | |
47 | * Ethernet software status per interface. | |
48 | * | |
49 | * Each interface is referenced by a network interface structure, | |
50 | * es_if, which the routing code uses to locate the interface. | |
51 | * This structure contains the output queue for the interface, its address, ... | |
52 | * We also have, for each interface, a UBA interface structure, which | |
53 | * contains information about the UNIBUS resources held by the interface: | |
54 | * map registers, buffered data paths, etc. Information is cached in this | |
55 | * structure for use by the if_uba.c routines in running the interface | |
56 | * efficiently. | |
57 | */ | |
8a13b737 | 58 | struct en_softc { |
f1b2fa5b BJ |
59 | struct ifnet es_if; /* network-visible interface */ |
60 | struct ifuba es_ifuba; /* UNIBUS resources */ | |
61 | short es_delay; /* current output delay */ | |
62 | short es_mask; /* mask for current output delay */ | |
0658a645 | 63 | short es_lastx; /* host last transmitted to */ |
f1b2fa5b BJ |
64 | short es_oactive; /* is output active? */ |
65 | short es_olen; /* length of last output */ | |
8a13b737 | 66 | } en_softc[NEN]; |
11720282 | 67 | |
f1b2fa5b BJ |
68 | /* |
69 | * Do output DMA to determine interface presence and | |
70 | * interrupt vector. DMA is too short to disturb other hosts. | |
71 | */ | |
11720282 BJ |
72 | enprobe(reg) |
73 | caddr_t reg; | |
74 | { | |
b454c3ea | 75 | register int br, cvec; /* r11, r10 value-result */ |
11720282 BJ |
76 | register struct endevice *addr = (struct endevice *)reg; |
77 | ||
8a13b737 | 78 | COUNT(ENPROBE); |
11720282 BJ |
79 | #ifdef lint |
80 | br = 0; cvec = br; br = cvec; | |
2b4b57cd | 81 | enrint(0); enxint(0); encollide(0); |
11720282 | 82 | #endif |
11720282 | 83 | addr->en_istat = 0; |
11720282 BJ |
84 | addr->en_owc = -1; |
85 | addr->en_oba = 0; | |
941ee7ef | 86 | addr->en_ostat = EN_IEN|EN_GO; |
11720282 BJ |
87 | DELAY(100000); |
88 | addr->en_ostat = 0; | |
7d6f1cd5 SL |
89 | #ifdef ECHACK |
90 | br = 0x16; | |
91 | #endif | |
11720282 BJ |
92 | return (1); |
93 | } | |
94 | ||
f1b2fa5b BJ |
95 | /* |
96 | * Interface exists: make available by filling in network interface | |
97 | * record. System will initialize the interface when it is ready | |
98 | * to accept packets. | |
99 | */ | |
11720282 BJ |
100 | enattach(ui) |
101 | struct uba_device *ui; | |
102 | { | |
f1b2fa5b | 103 | register struct en_softc *es = &en_softc[ui->ui_unit]; |
ee787340 | 104 | register struct sockaddr_in *sin; |
8a13b737 | 105 | COUNT(ENATTACH); |
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; |
e3631d06 | 110 | es->es_if.if_net = ui->ui_flags & 0xff; |
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; |
f1b2fa5b | 122 | es->es_if.if_ubareset = enreset; |
d9c0644f | 123 | es->es_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16 | UBA_CANTWAIT; |
405c9168 | 124 | if_attach(&es->es_if); |
a9f3e174 SL |
125 | #if NIMP == 0 |
126 | /* here's one for you john baby.... */ | |
dc39362e BJ |
127 | if (ui->ui_flags &~ 0xff) |
128 | enlhinit(&es->es_if, (ui->ui_flags &~ 0xff) | 0x0a); | |
a9f3e174 | 129 | #endif |
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; |
f1b2fa5b | 140 | COUNT(ENRESET); |
11720282 | 141 | |
b454c3ea BJ |
142 | if (unit >= NEN || (ui = eninfo[unit]) == 0 || ui->ui_alive == 0 || |
143 | ui->ui_ubanum != uban) | |
f1b2fa5b | 144 | return; |
b454c3ea | 145 | printf(" en%d", unit); |
f1b2fa5b BJ |
146 | eninit(unit); |
147 | } | |
148 | ||
149 | /* | |
150 | * Initialization of interface; clear recorded pending | |
151 | * operations, and reinitialize UNIBUS usage. | |
152 | */ | |
153 | eninit(unit) | |
154 | int unit; | |
155 | { | |
b454c3ea BJ |
156 | register struct en_softc *es = &en_softc[unit]; |
157 | register struct uba_device *ui = eninfo[unit]; | |
f1b2fa5b | 158 | register struct endevice *addr; |
f1b2fa5b BJ |
159 | int s; |
160 | ||
f1b2fa5b | 161 | if (if_ubainit(&es->es_ifuba, ui->ui_ubanum, |
dc39362e | 162 | sizeof (struct en_header), (int)btoc(ENMRU)) == 0) { |
b454c3ea | 163 | printf("en%d: can't initialize\n", unit); |
ee787340 | 164 | es->es_if.if_flags &= ~IFF_UP; |
8a13b737 | 165 | return; |
11720282 | 166 | } |
11720282 | 167 | addr = (struct endevice *)ui->ui_addr; |
8a13b737 | 168 | addr->en_istat = addr->en_ostat = 0; |
11720282 | 169 | |
f1b2fa5b | 170 | /* |
b454c3ea BJ |
171 | * Hang a receive and start any |
172 | * pending writes by faking a transmit complete. | |
f1b2fa5b BJ |
173 | */ |
174 | s = splimp(); | |
b454c3ea | 175 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; |
dc39362e | 176 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
b454c3ea BJ |
177 | addr->en_istat = EN_IEN|EN_GO; |
178 | es->es_oactive = 1; | |
ee787340 | 179 | es->es_if.if_flags |= IFF_UP; |
f1b2fa5b BJ |
180 | enxint(unit); |
181 | splx(s); | |
f6311fb6 | 182 | if_rtinit(&es->es_if, RTF_DIRECT|RTF_UP); |
11720282 BJ |
183 | } |
184 | ||
0658a645 | 185 | int enalldelay = 0; |
4c073c48 | 186 | int enlastdel = 50; |
0658a645 | 187 | int enlastmask = (~0) << 5; |
8a13b737 | 188 | |
f1b2fa5b BJ |
189 | /* |
190 | * Start or restart output on interface. | |
191 | * If interface is already active, then this is a retransmit | |
192 | * after a collision, and just restuff registers and delay. | |
193 | * If interface is not already active, get another datagram | |
194 | * to send off of the interface queue, and map it to the interface | |
195 | * before starting the output. | |
196 | */ | |
ae348eea | 197 | enstart(dev) |
11720282 BJ |
198 | dev_t dev; |
199 | { | |
b454c3ea BJ |
200 | int unit = ENUNIT(dev); |
201 | struct uba_device *ui = eninfo[unit]; | |
202 | register struct en_softc *es = &en_softc[unit]; | |
8a13b737 | 203 | register struct endevice *addr; |
8a13b737 BJ |
204 | struct mbuf *m; |
205 | int dest; | |
ae348eea | 206 | COUNT(ENSTART); |
11720282 | 207 | |
8a13b737 BJ |
208 | if (es->es_oactive) |
209 | goto restart; | |
f1b2fa5b BJ |
210 | |
211 | /* | |
212 | * Not already active: dequeue another request | |
213 | * and map it to the UNIBUS. If no more requests, | |
214 | * just return. | |
215 | */ | |
216 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
8a13b737 BJ |
217 | if (m == 0) { |
218 | es->es_oactive = 0; | |
11720282 BJ |
219 | return; |
220 | } | |
a453e1b5 | 221 | dest = mtod(m, struct en_header *)->en_dhost; |
8a13b737 | 222 | es->es_olen = if_wubaput(&es->es_ifuba, m); |
f1b2fa5b BJ |
223 | |
224 | /* | |
225 | * Ethernet cannot take back-to-back packets (no | |
0658a645 BJ |
226 | * buffering in interface. To help avoid overrunning |
227 | * receivers, enforce a small delay (about 1ms) in interface: | |
228 | * * between all packets when enalldelay | |
229 | * * whenever last packet was broadcast | |
230 | * * whenever this packet is to same host as last packet | |
f1b2fa5b | 231 | */ |
0658a645 | 232 | if (enalldelay || es->es_lastx == 0 || es->es_lastx == dest) { |
8a13b737 | 233 | es->es_delay = enlastdel; |
0658a645 BJ |
234 | es->es_mask = enlastmask; |
235 | } | |
236 | es->es_lastx = dest; | |
f1b2fa5b | 237 | |
8a13b737 | 238 | restart: |
f1b2fa5b BJ |
239 | /* |
240 | * Have request mapped to UNIBUS for transmission. | |
241 | * Purge any stale data from this BDP, and start the otput. | |
242 | */ | |
ee787340 SL |
243 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
244 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_w.ifrw_bdp); | |
11720282 | 245 | addr = (struct endevice *)ui->ui_addr; |
405c9168 | 246 | addr->en_oba = (int)es->es_ifuba.ifu_w.ifrw_info; |
8a13b737 BJ |
247 | addr->en_odelay = es->es_delay; |
248 | addr->en_owc = -((es->es_olen + 1) >> 1); | |
941ee7ef | 249 | addr->en_ostat = EN_IEN|EN_GO; |
8a13b737 | 250 | es->es_oactive = 1; |
11720282 BJ |
251 | } |
252 | ||
f1b2fa5b BJ |
253 | /* |
254 | * Ethernet interface transmitter interrupt. | |
255 | * Start another output if more data to send. | |
256 | */ | |
11720282 BJ |
257 | enxint(unit) |
258 | int unit; | |
259 | { | |
b454c3ea BJ |
260 | register struct uba_device *ui = eninfo[unit]; |
261 | register struct en_softc *es = &en_softc[unit]; | |
519a1ecf | 262 | register struct endevice *addr = (struct endevice *)ui->ui_addr; |
11720282 BJ |
263 | COUNT(ENXINT); |
264 | ||
8a13b737 BJ |
265 | if (es->es_oactive == 0) |
266 | return; | |
519a1ecf | 267 | if (es->es_mask && (addr->en_ostat&EN_OERROR)) { |
89413846 | 268 | es->es_if.if_oerrors++; |
4020bf24 BJ |
269 | if (es->es_if.if_oerrors % 100 == 0) |
270 | printf("en%d: += 100 output errors\n", unit); | |
519a1ecf BJ |
271 | endocoll(unit); |
272 | return; | |
89413846 | 273 | } |
519a1ecf BJ |
274 | es->es_if.if_opackets++; |
275 | es->es_oactive = 0; | |
276 | es->es_delay = 0; | |
277 | es->es_mask = ~0; | |
7a66118b BJ |
278 | if (es->es_ifuba.ifu_xtofree) { |
279 | m_freem(es->es_ifuba.ifu_xtofree); | |
280 | es->es_ifuba.ifu_xtofree = 0; | |
281 | } | |
f1b2fa5b | 282 | if (es->es_if.if_snd.ifq_head == 0) { |
0658a645 | 283 | es->es_lastx = 256; /* putatively illegal */ |
11720282 BJ |
284 | return; |
285 | } | |
8a13b737 | 286 | enstart(unit); |
11720282 BJ |
287 | } |
288 | ||
f1b2fa5b BJ |
289 | /* |
290 | * Collision on ethernet interface. Do exponential | |
291 | * backoff, and retransmit. If have backed off all | |
ee787340 | 292 | * the way print warning diagnostic, and drop packet. |
f1b2fa5b | 293 | */ |
11720282 BJ |
294 | encollide(unit) |
295 | int unit; | |
296 | { | |
519a1ecf | 297 | struct en_softc *es = &en_softc[unit]; |
11720282 BJ |
298 | COUNT(ENCOLLIDE); |
299 | ||
f1b2fa5b | 300 | es->es_if.if_collisions++; |
8a13b737 | 301 | if (es->es_oactive == 0) |
11720282 | 302 | return; |
519a1ecf BJ |
303 | endocoll(unit); |
304 | } | |
305 | ||
306 | endocoll(unit) | |
307 | int unit; | |
308 | { | |
309 | register struct en_softc *es = &en_softc[unit]; | |
310 | ||
b454c3ea BJ |
311 | /* |
312 | * Es_mask is a 16 bit number with n low zero bits, with | |
313 | * n the number of backoffs. When es_mask is 0 we have | |
314 | * backed off 16 times, and give up. | |
315 | */ | |
8a13b737 | 316 | if (es->es_mask == 0) { |
a453e1b5 | 317 | printf("en%d: send error\n", unit); |
8a13b737 | 318 | enxint(unit); |
b454c3ea | 319 | return; |
11720282 | 320 | } |
b454c3ea BJ |
321 | /* |
322 | * Another backoff. Restart with delay based on n low bits | |
323 | * of the interval timer. | |
324 | */ | |
325 | es->es_mask <<= 1; | |
326 | es->es_delay = mfpr(ICR) &~ es->es_mask; | |
327 | enstart(unit); | |
11720282 BJ |
328 | } |
329 | ||
31c2345c SL |
330 | struct sockaddr_pup pupsrc = { AF_PUP }; |
331 | struct sockaddr_pup pupdst = { AF_PUP }; | |
332 | struct sockproto pupproto = { PF_PUP }; | |
f1b2fa5b BJ |
333 | /* |
334 | * Ethernet interface receiver interrupt. | |
335 | * If input error just drop packet. | |
336 | * Otherwise purge input buffered data path and examine | |
337 | * packet to determine type. If can't determine length | |
338 | * from type, then have to drop packet. Othewise decapsulate | |
339 | * packet based on type and pass to type specific higher-level | |
340 | * input routine. | |
341 | */ | |
11720282 BJ |
342 | enrint(unit) |
343 | int unit; | |
344 | { | |
b454c3ea BJ |
345 | register struct en_softc *es = &en_softc[unit]; |
346 | struct endevice *addr = (struct endevice *)eninfo[unit]->ui_addr; | |
347 | register struct en_header *en; | |
8a13b737 | 348 | struct mbuf *m; |
0658a645 | 349 | int len, plen; short resid; |
b454c3ea | 350 | register struct ifqueue *inq; |
8a13b737 | 351 | int off; |
11720282 BJ |
352 | COUNT(ENRINT); |
353 | ||
b454c3ea | 354 | es->es_if.if_ipackets++; |
f1b2fa5b BJ |
355 | |
356 | /* | |
b454c3ea | 357 | * Purge BDP; drop if input error indicated. |
f1b2fa5b | 358 | */ |
ee787340 SL |
359 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
360 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_r.ifrw_bdp); | |
941ee7ef | 361 | if (addr->en_istat&EN_IERROR) { |
f1b2fa5b | 362 | es->es_if.if_ierrors++; |
4020bf24 BJ |
363 | if (es->es_if.if_ierrors % 100 == 0) |
364 | printf("en%d: += 100 input errors\n", unit); | |
8a13b737 | 365 | goto setup; |
11720282 | 366 | } |
f1b2fa5b BJ |
367 | |
368 | /* | |
0658a645 | 369 | * Calculate input data length. |
f1b2fa5b BJ |
370 | * Get pointer to ethernet header (in input buffer). |
371 | * Deal with trailer protocol: if type is PUP trailer | |
372 | * get true type from first 16-bit word past data. | |
373 | * Remember that type was trailer by setting off. | |
374 | */ | |
0658a645 BJ |
375 | resid = addr->en_iwc; |
376 | if (resid) | |
377 | resid |= 0176000; | |
dc39362e | 378 | len = (((sizeof (struct en_header) + ENMRU) >> 1) + resid) << 1; |
0658a645 | 379 | len -= sizeof (struct en_header); |
dc39362e | 380 | if (len > ENMRU) |
0658a645 | 381 | goto setup; /* sanity */ |
f1b2fa5b | 382 | en = (struct en_header *)(es->es_ifuba.ifu_r.ifrw_addr); |
8a13b737 BJ |
383 | #define endataaddr(en, off, type) ((type)(((caddr_t)((en)+1)+(off)))) |
384 | if (en->en_type >= ENPUP_TRAIL && | |
385 | en->en_type < ENPUP_TRAIL+ENPUP_NTRAILER) { | |
386 | off = (en->en_type - ENPUP_TRAIL) * 512; | |
dc39362e | 387 | if (off > ENMTU) |
b454c3ea | 388 | goto setup; /* sanity */ |
8a13b737 | 389 | en->en_type = *endataaddr(en, off, u_short *); |
0658a645 BJ |
390 | resid = *(endataaddr(en, off+2, u_short *)); |
391 | if (off + resid > len) | |
392 | goto setup; /* sanity */ | |
393 | len = off + resid; | |
8a13b737 BJ |
394 | } else |
395 | off = 0; | |
8a13b737 BJ |
396 | if (len == 0) |
397 | goto setup; | |
f1b2fa5b BJ |
398 | /* |
399 | * Pull packet off interface. Off is nonzero if packet | |
400 | * has trailing header; if_rubaget will then force this header | |
401 | * information to be at the front, but we still have to drop | |
0658a645 | 402 | * the type and length which are at the front of any trailer data. |
f1b2fa5b BJ |
403 | */ |
404 | m = if_rubaget(&es->es_ifuba, len, off); | |
a453e1b5 BJ |
405 | if (m == 0) |
406 | goto setup; | |
f1b2fa5b | 407 | if (off) { |
0658a645 BJ |
408 | m->m_off += 2 * sizeof (u_short); |
409 | m->m_len -= 2 * sizeof (u_short); | |
f1b2fa5b | 410 | } |
31c2345c SL |
411 | switch (en->en_type) { |
412 | ||
413 | #ifdef INET | |
414 | case ENPUP_IPTYPE: | |
9c8692e9 | 415 | schednetisr(NETISR_IP); |
31c2345c SL |
416 | inq = &ipintrq; |
417 | break; | |
418 | #endif | |
ee787340 | 419 | #ifdef PUP |
31c2345c SL |
420 | case ENPUP_PUPTYPE: { |
421 | struct pup_header *pup = mtod(m, struct pup_header *); | |
422 | ||
423 | pupproto.sp_protocol = pup->pup_type; | |
424 | pupdst.spup_addr = pup->pup_dport; | |
425 | pupsrc.spup_addr = pup->pup_sport; | |
57aa3090 SL |
426 | raw_input(m, &pupproto, (struct sockaddr *)&pupsrc, |
427 | (struct sockaddr *)&pupdst); | |
31c2345c | 428 | goto setup; |
31c2345c | 429 | } |
ee787340 | 430 | #endif |
c8f8184f BJ |
431 | default: |
432 | m_freem(m); | |
433 | goto setup; | |
ee787340 SL |
434 | } |
435 | ||
1e977657 BJ |
436 | if (IF_QFULL(inq)) { |
437 | IF_DROP(inq); | |
ee787340 | 438 | m_freem(m); |
1e977657 BJ |
439 | } else |
440 | IF_ENQUEUE(inq, m); | |
f1b2fa5b | 441 | |
ae348eea | 442 | setup: |
f1b2fa5b BJ |
443 | /* |
444 | * Reset for next packet. | |
445 | */ | |
446 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; | |
dc39362e | 447 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
941ee7ef | 448 | addr->en_istat = EN_IEN|EN_GO; |
ae348eea | 449 | } |
11720282 | 450 | |
8a13b737 BJ |
451 | /* |
452 | * Ethernet output routine. | |
453 | * Encapsulate a packet of type family for the local net. | |
f1b2fa5b BJ |
454 | * Use trailer local net encapsulation if enough data in first |
455 | * packet leaves a multiple of 512 bytes of data in remainder. | |
8a13b737 | 456 | */ |
ee787340 | 457 | enoutput(ifp, m0, dst) |
8a13b737 BJ |
458 | struct ifnet *ifp; |
459 | struct mbuf *m0; | |
ee787340 | 460 | struct sockaddr *dst; |
11720282 | 461 | { |
8a2f82db | 462 | int type, dest, s, error; |
f1b2fa5b | 463 | register struct mbuf *m = m0; |
8a13b737 | 464 | register struct en_header *en; |
ee787340 | 465 | register int off; |
8a13b737 | 466 | |
9d1b03e0 | 467 | COUNT(ENOUTPUT); |
ee787340 | 468 | switch (dst->sa_family) { |
11720282 | 469 | |
8a13b737 | 470 | #ifdef INET |
ee787340 | 471 | case AF_INET: |
4e818526 | 472 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
8a2f82db SL |
473 | if (dest & 0x00ffff00) { |
474 | error = EPERM; /* ??? */ | |
3734056d | 475 | goto bad; |
8a2f82db | 476 | } |
4e818526 | 477 | dest = (dest >> 24) & 0xff; |
ee787340 SL |
478 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
479 | if (off > 0 && (off & 0x1ff) == 0 && | |
0658a645 | 480 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { |
8a13b737 | 481 | type = ENPUP_TRAIL + (off>>9); |
0658a645 BJ |
482 | m->m_off -= 2 * sizeof (u_short); |
483 | m->m_len += 2 * sizeof (u_short); | |
f1b2fa5b | 484 | *mtod(m, u_short *) = ENPUP_IPTYPE; |
0658a645 | 485 | *(mtod(m, u_short *) + 1) = m->m_len; |
f1b2fa5b | 486 | goto gottrailertype; |
8a13b737 | 487 | } |
f1b2fa5b BJ |
488 | type = ENPUP_IPTYPE; |
489 | off = 0; | |
490 | goto gottype; | |
8a13b737 | 491 | #endif |
31c2345c | 492 | #ifdef PUP |
ee787340 SL |
493 | case AF_PUP: |
494 | dest = ((struct sockaddr_pup *)dst)->spup_addr.pp_host; | |
31c2345c SL |
495 | type = ENPUP_PUPTYPE; |
496 | off = 0; | |
497 | goto gottype; | |
31c2345c | 498 | #endif |
8a13b737 BJ |
499 | |
500 | default: | |
ee787340 SL |
501 | printf("en%d: can't handle af%d\n", ifp->if_unit, |
502 | dst->sa_family); | |
8a2f82db SL |
503 | error = EAFNOSUPPORT; |
504 | goto bad; | |
8a13b737 | 505 | } |
f1b2fa5b | 506 | |
b454c3ea | 507 | gottrailertype: |
f1b2fa5b BJ |
508 | /* |
509 | * Packet to be sent as trailer: move first packet | |
510 | * (control information) to end of chain. | |
511 | */ | |
f1b2fa5b BJ |
512 | while (m->m_next) |
513 | m = m->m_next; | |
514 | m->m_next = m0; | |
515 | m = m0->m_next; | |
516 | m0->m_next = 0; | |
b454c3ea | 517 | m0 = m; |
f1b2fa5b | 518 | |
b454c3ea | 519 | gottype: |
f1b2fa5b BJ |
520 | /* |
521 | * Add local net header. If no space in first mbuf, | |
522 | * allocate another. | |
523 | */ | |
a453e1b5 BJ |
524 | if (m->m_off > MMAXOFF || |
525 | MMINOFF + sizeof (struct en_header) > m->m_off) { | |
ef9b4258 | 526 | m = m_get(M_DONTWAIT); |
8a13b737 | 527 | if (m == 0) { |
8a2f82db SL |
528 | error = ENOBUFS; |
529 | goto bad; | |
8a13b737 BJ |
530 | } |
531 | m->m_next = m0; | |
532 | m->m_off = MMINOFF; | |
533 | m->m_len = sizeof (struct en_header); | |
534 | } else { | |
8a13b737 BJ |
535 | m->m_off -= sizeof (struct en_header); |
536 | m->m_len += sizeof (struct en_header); | |
11720282 | 537 | } |
8a13b737 BJ |
538 | en = mtod(m, struct en_header *); |
539 | en->en_shost = ifp->if_host[0]; | |
540 | en->en_dhost = dest; | |
541 | en->en_type = type; | |
f1b2fa5b BJ |
542 | |
543 | /* | |
544 | * Queue message on interface, and start output if interface | |
545 | * not yet active. | |
546 | */ | |
8a13b737 | 547 | s = splimp(); |
1e977657 BJ |
548 | if (IF_QFULL(&ifp->if_snd)) { |
549 | IF_DROP(&ifp->if_snd); | |
8a2f82db SL |
550 | error = ENOBUFS; |
551 | goto qfull; | |
1e977657 | 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); |
4e818526 | 557 | return (0); |
8a2f82db SL |
558 | qfull: |
559 | m0 = m; | |
560 | splx(s); | |
561 | bad: | |
562 | m_freem(m0); | |
563 | return (error); | |
11720282 | 564 | } |
a9f3e174 SL |
565 | |
566 | #if NIMP == 0 && NEN > 0 | |
567 | /* | |
568 | * Logical host interface driver. | |
569 | * Allows host to appear as an ARPAnet | |
570 | * logical host. Must also have routing | |
571 | * table entry set up to forward packets | |
572 | * to appropriate gateway on localnet. | |
573 | */ | |
574 | ||
575 | struct ifnet enlhif; | |
dc39362e | 576 | int looutput(); |
a9f3e174 SL |
577 | |
578 | /* | |
579 | * Called by localnet interface to allow logical | |
dc39362e | 580 | * host interface to "attach", it's purpose |
a9f3e174 SL |
581 | * is simply to establish the host's arpanet address. |
582 | */ | |
dc39362e BJ |
583 | enlhinit(esifp, addr) |
584 | struct ifnet *esifp; | |
a9f3e174 SL |
585 | int addr; |
586 | { | |
587 | register struct ifnet *ifp = &enlhif; | |
588 | register struct sockaddr_in *sin; | |
589 | ||
590 | COUNT(ENLHINIT); | |
591 | ifp->if_name = "lh"; | |
592 | ifp->if_mtu = ENMTU; | |
593 | sin = (struct sockaddr_in *)&ifp->if_addr; | |
594 | sin->sin_family = AF_INET; | |
595 | sin->sin_addr.s_addr = addr; | |
596 | ifp->if_net = sin->sin_addr.s_net; | |
dc39362e BJ |
597 | ifp->if_flags = IFF_UP|IFF_POINTOPOINT; |
598 | ifp->if_dstaddr = esifp->if_addr; | |
599 | ifp->if_output = looutput; | |
a9f3e174 | 600 | if_attach(ifp); |
c46ba114 | 601 | rtinit(&ifp->if_addr, &ifp->if_addr, RTF_UP|RTF_DIRECT|RTF_HOST); |
a9f3e174 SL |
602 | } |
603 | #endif |