Commit | Line | Data |
---|---|---|
1c44ed58 | 1 | /* if_en.c 4.81 83/06/26 */ |
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" |
47695a10 SL |
17 | #include "../h/errno.h" |
18 | #include "../h/ioctl.h" | |
eaa60542 BJ |
19 | |
20 | #include "../net/if.h" | |
21 | #include "../net/netisr.h" | |
22 | #include "../net/route.h" | |
d2cc167c BJ |
23 | #include "../netinet/in.h" |
24 | #include "../netinet/in_systm.h" | |
d2cc167c BJ |
25 | #include "../netinet/ip.h" |
26 | #include "../netinet/ip_var.h" | |
27 | #include "../netpup/pup.h" | |
eaa60542 BJ |
28 | |
29 | #include "../vax/cpu.h" | |
30 | #include "../vax/mtpr.h" | |
31 | #include "../vaxif/if_en.h" | |
32 | #include "../vaxif/if_enreg.h" | |
33 | #include "../vaxif/if_uba.h" | |
34 | #include "../vaxuba/ubareg.h" | |
35 | #include "../vaxuba/ubavar.h" | |
8a13b737 | 36 | |
a453e1b5 | 37 | #define ENMTU (1024+512) |
dc39362e | 38 | #define ENMRU (1024+512+16) /* 16 is enough to receive trailer */ |
11720282 | 39 | |
11720282 BJ |
40 | int enprobe(), enattach(), enrint(), enxint(), encollide(); |
41 | struct uba_device *eninfo[NEN]; | |
42 | u_short enstd[] = { 0 }; | |
43 | struct uba_driver endriver = | |
b454c3ea | 44 | { enprobe, 0, enattach, 0, enstd, "en", eninfo }; |
11720282 BJ |
45 | #define ENUNIT(x) minor(x) |
46 | ||
47695a10 | 47 | int eninit(),enoutput(),enreset(),enioctl(); |
f1b2fa5b | 48 | |
c1b082c5 SL |
49 | #ifdef notdef |
50 | /* | |
51 | * If you need to byte swap IP's in the system, define | |
52 | * this and do a SIOCSIFFLAGS at boot time. | |
53 | */ | |
54 | #define ENF_SWABIPS 0x100 | |
55 | #endif | |
56 | ||
f1b2fa5b BJ |
57 | /* |
58 | * Ethernet software status per interface. | |
59 | * | |
60 | * Each interface is referenced by a network interface structure, | |
61 | * es_if, which the routing code uses to locate the interface. | |
62 | * This structure contains the output queue for the interface, its address, ... | |
63 | * We also have, for each interface, a UBA interface structure, which | |
64 | * contains information about the UNIBUS resources held by the interface: | |
65 | * map registers, buffered data paths, etc. Information is cached in this | |
66 | * structure for use by the if_uba.c routines in running the interface | |
67 | * efficiently. | |
68 | */ | |
8a13b737 | 69 | struct en_softc { |
f1b2fa5b BJ |
70 | struct ifnet es_if; /* network-visible interface */ |
71 | struct ifuba es_ifuba; /* UNIBUS resources */ | |
72 | short es_delay; /* current output delay */ | |
73 | short es_mask; /* mask for current output delay */ | |
0658a645 | 74 | short es_lastx; /* host last transmitted to */ |
f1b2fa5b BJ |
75 | short es_oactive; /* is output active? */ |
76 | short es_olen; /* length of last output */ | |
8a13b737 | 77 | } en_softc[NEN]; |
11720282 | 78 | |
f1b2fa5b BJ |
79 | /* |
80 | * Do output DMA to determine interface presence and | |
81 | * interrupt vector. DMA is too short to disturb other hosts. | |
82 | */ | |
11720282 BJ |
83 | enprobe(reg) |
84 | caddr_t reg; | |
85 | { | |
b454c3ea | 86 | register int br, cvec; /* r11, r10 value-result */ |
11720282 BJ |
87 | register struct endevice *addr = (struct endevice *)reg; |
88 | ||
89 | #ifdef lint | |
90 | br = 0; cvec = br; br = cvec; | |
2b4b57cd | 91 | enrint(0); enxint(0); encollide(0); |
11720282 | 92 | #endif |
11720282 | 93 | addr->en_istat = 0; |
11720282 BJ |
94 | addr->en_owc = -1; |
95 | addr->en_oba = 0; | |
941ee7ef | 96 | addr->en_ostat = EN_IEN|EN_GO; |
11720282 BJ |
97 | DELAY(100000); |
98 | addr->en_ostat = 0; | |
11720282 BJ |
99 | return (1); |
100 | } | |
101 | ||
f1b2fa5b BJ |
102 | /* |
103 | * Interface exists: make available by filling in network interface | |
104 | * record. System will initialize the interface when it is ready | |
105 | * to accept packets. | |
106 | */ | |
11720282 BJ |
107 | enattach(ui) |
108 | struct uba_device *ui; | |
109 | { | |
f1b2fa5b | 110 | register struct en_softc *es = &en_softc[ui->ui_unit]; |
f1b2fa5b BJ |
111 | |
112 | es->es_if.if_unit = ui->ui_unit; | |
b454c3ea | 113 | es->es_if.if_name = "en"; |
f1b2fa5b | 114 | es->es_if.if_mtu = ENMTU; |
f1b2fa5b | 115 | es->es_if.if_init = eninit; |
b454c3ea | 116 | es->es_if.if_output = enoutput; |
47695a10 | 117 | es->es_if.if_ioctl = enioctl; |
51595ca2 | 118 | es->es_if.if_reset = enreset; |
d9c0644f | 119 | es->es_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16 | UBA_CANTWAIT; |
b4e3e570 SL |
120 | #if defined(VAX750) |
121 | /* don't chew up 750 bdp's */ | |
122 | if (cpu == VAX_750 && ui->ui_unit > 0) | |
123 | es->es_ifuba.ifu_flags &= ~UBA_NEEDBDP; | |
124 | #endif | |
405c9168 | 125 | if_attach(&es->es_if); |
11720282 BJ |
126 | } |
127 | ||
f1b2fa5b BJ |
128 | /* |
129 | * Reset of interface after UNIBUS reset. | |
130 | * If interface is on specified uba, reset its state. | |
131 | */ | |
132 | enreset(unit, uban) | |
133 | int unit, uban; | |
8a13b737 | 134 | { |
11720282 | 135 | register struct uba_device *ui; |
11720282 | 136 | |
b454c3ea BJ |
137 | if (unit >= NEN || (ui = eninfo[unit]) == 0 || ui->ui_alive == 0 || |
138 | ui->ui_ubanum != uban) | |
f1b2fa5b | 139 | return; |
b454c3ea | 140 | printf(" en%d", unit); |
f1b2fa5b BJ |
141 | eninit(unit); |
142 | } | |
143 | ||
144 | /* | |
145 | * Initialization of interface; clear recorded pending | |
146 | * operations, and reinitialize UNIBUS usage. | |
147 | */ | |
148 | eninit(unit) | |
149 | int unit; | |
150 | { | |
b454c3ea BJ |
151 | register struct en_softc *es = &en_softc[unit]; |
152 | register struct uba_device *ui = eninfo[unit]; | |
f1b2fa5b | 153 | register struct endevice *addr; |
732fb59b | 154 | struct sockaddr_in *sin = (struct sockaddr_in *)&es->es_if.if_addr; |
47695a10 | 155 | int s; |
f1b2fa5b | 156 | |
47695a10 | 157 | if (in_netof(sin->sin_addr) == 0) |
732fb59b | 158 | return; |
f1b2fa5b | 159 | if (if_ubainit(&es->es_ifuba, ui->ui_ubanum, |
dc39362e | 160 | sizeof (struct en_header), (int)btoc(ENMRU)) == 0) { |
b454c3ea | 161 | printf("en%d: can't initialize\n", unit); |
ee787340 | 162 | es->es_if.if_flags &= ~IFF_UP; |
8a13b737 | 163 | return; |
11720282 | 164 | } |
11720282 | 165 | addr = (struct endevice *)ui->ui_addr; |
8a13b737 | 166 | addr->en_istat = addr->en_ostat = 0; |
11720282 | 167 | |
f1b2fa5b | 168 | /* |
b454c3ea BJ |
169 | * Hang a receive and start any |
170 | * pending writes by faking a transmit complete. | |
f1b2fa5b BJ |
171 | */ |
172 | s = splimp(); | |
b454c3ea | 173 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; |
dc39362e | 174 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
b454c3ea BJ |
175 | addr->en_istat = EN_IEN|EN_GO; |
176 | es->es_oactive = 1; | |
47695a10 | 177 | es->es_if.if_flags |= IFF_UP|IFF_RUNNING; |
f1b2fa5b BJ |
178 | enxint(unit); |
179 | splx(s); | |
a13c006d | 180 | if_rtinit(&es->es_if, RTF_UP); |
11720282 BJ |
181 | } |
182 | ||
0658a645 | 183 | int enalldelay = 0; |
4c073c48 | 184 | int enlastdel = 50; |
0658a645 | 185 | int enlastmask = (~0) << 5; |
8a13b737 | 186 | |
f1b2fa5b BJ |
187 | /* |
188 | * Start or restart output on interface. | |
189 | * If interface is already active, then this is a retransmit | |
190 | * after a collision, and just restuff registers and delay. | |
191 | * If interface is not already active, get another datagram | |
192 | * to send off of the interface queue, and map it to the interface | |
193 | * before starting the output. | |
194 | */ | |
ae348eea | 195 | enstart(dev) |
11720282 BJ |
196 | dev_t dev; |
197 | { | |
b454c3ea BJ |
198 | int unit = ENUNIT(dev); |
199 | struct uba_device *ui = eninfo[unit]; | |
200 | register struct en_softc *es = &en_softc[unit]; | |
8a13b737 | 201 | register struct endevice *addr; |
8a13b737 BJ |
202 | struct mbuf *m; |
203 | int dest; | |
11720282 | 204 | |
8a13b737 BJ |
205 | if (es->es_oactive) |
206 | goto restart; | |
f1b2fa5b BJ |
207 | |
208 | /* | |
209 | * Not already active: dequeue another request | |
210 | * and map it to the UNIBUS. If no more requests, | |
211 | * just return. | |
212 | */ | |
213 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
8a13b737 BJ |
214 | if (m == 0) { |
215 | es->es_oactive = 0; | |
11720282 BJ |
216 | return; |
217 | } | |
a453e1b5 | 218 | dest = mtod(m, struct en_header *)->en_dhost; |
8a13b737 | 219 | es->es_olen = if_wubaput(&es->es_ifuba, m); |
c1b082c5 SL |
220 | #ifdef ENF_SWABIPS |
221 | /* | |
222 | * The Xerox interface does word at a time DMA, so | |
223 | * someone must do byte swapping of user data if high | |
224 | * and low ender machines are to communicate. It doesn't | |
225 | * belong here, but certain people depend on it, so... | |
226 | * | |
227 | * Should swab everybody, but this is a kludge anyway. | |
228 | */ | |
229 | if (es->es_if.if_flags & ENF_SWABIPS) { | |
230 | register struct en_header *en; | |
231 | ||
232 | en = (struct en_header *)es->es_ifuba.ifu_w.ifrw_addr; | |
233 | if (en->en_type == ENTYPE_IP) | |
234 | enswab((caddr_t)(en + 1), (caddr_t)(en + 1), | |
235 | es->es_olen - sizeof (struct en_header) + 1); | |
236 | } | |
237 | #endif | |
f1b2fa5b BJ |
238 | |
239 | /* | |
240 | * Ethernet cannot take back-to-back packets (no | |
0658a645 BJ |
241 | * buffering in interface. To help avoid overrunning |
242 | * receivers, enforce a small delay (about 1ms) in interface: | |
243 | * * between all packets when enalldelay | |
244 | * * whenever last packet was broadcast | |
245 | * * whenever this packet is to same host as last packet | |
f1b2fa5b | 246 | */ |
0658a645 | 247 | if (enalldelay || es->es_lastx == 0 || es->es_lastx == dest) { |
8a13b737 | 248 | es->es_delay = enlastdel; |
0658a645 BJ |
249 | es->es_mask = enlastmask; |
250 | } | |
251 | es->es_lastx = dest; | |
f1b2fa5b | 252 | |
8a13b737 | 253 | restart: |
f1b2fa5b BJ |
254 | /* |
255 | * Have request mapped to UNIBUS for transmission. | |
256 | * Purge any stale data from this BDP, and start the otput. | |
257 | */ | |
ee787340 SL |
258 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
259 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_w.ifrw_bdp); | |
11720282 | 260 | addr = (struct endevice *)ui->ui_addr; |
405c9168 | 261 | addr->en_oba = (int)es->es_ifuba.ifu_w.ifrw_info; |
8a13b737 BJ |
262 | addr->en_odelay = es->es_delay; |
263 | addr->en_owc = -((es->es_olen + 1) >> 1); | |
941ee7ef | 264 | addr->en_ostat = EN_IEN|EN_GO; |
8a13b737 | 265 | es->es_oactive = 1; |
11720282 BJ |
266 | } |
267 | ||
f1b2fa5b BJ |
268 | /* |
269 | * Ethernet interface transmitter interrupt. | |
270 | * Start another output if more data to send. | |
271 | */ | |
11720282 BJ |
272 | enxint(unit) |
273 | int unit; | |
274 | { | |
b454c3ea BJ |
275 | register struct uba_device *ui = eninfo[unit]; |
276 | register struct en_softc *es = &en_softc[unit]; | |
519a1ecf | 277 | register struct endevice *addr = (struct endevice *)ui->ui_addr; |
11720282 | 278 | |
8a13b737 BJ |
279 | if (es->es_oactive == 0) |
280 | return; | |
519a1ecf | 281 | if (es->es_mask && (addr->en_ostat&EN_OERROR)) { |
89413846 | 282 | es->es_if.if_oerrors++; |
519a1ecf BJ |
283 | endocoll(unit); |
284 | return; | |
89413846 | 285 | } |
519a1ecf BJ |
286 | es->es_if.if_opackets++; |
287 | es->es_oactive = 0; | |
288 | es->es_delay = 0; | |
289 | es->es_mask = ~0; | |
7a66118b BJ |
290 | if (es->es_ifuba.ifu_xtofree) { |
291 | m_freem(es->es_ifuba.ifu_xtofree); | |
292 | es->es_ifuba.ifu_xtofree = 0; | |
293 | } | |
f1b2fa5b | 294 | if (es->es_if.if_snd.ifq_head == 0) { |
0658a645 | 295 | es->es_lastx = 256; /* putatively illegal */ |
11720282 BJ |
296 | return; |
297 | } | |
8a13b737 | 298 | enstart(unit); |
11720282 BJ |
299 | } |
300 | ||
f1b2fa5b BJ |
301 | /* |
302 | * Collision on ethernet interface. Do exponential | |
303 | * backoff, and retransmit. If have backed off all | |
ee787340 | 304 | * the way print warning diagnostic, and drop packet. |
f1b2fa5b | 305 | */ |
11720282 BJ |
306 | encollide(unit) |
307 | int unit; | |
308 | { | |
519a1ecf | 309 | struct en_softc *es = &en_softc[unit]; |
11720282 | 310 | |
f1b2fa5b | 311 | es->es_if.if_collisions++; |
8a13b737 | 312 | if (es->es_oactive == 0) |
11720282 | 313 | return; |
519a1ecf BJ |
314 | endocoll(unit); |
315 | } | |
316 | ||
317 | endocoll(unit) | |
318 | int unit; | |
319 | { | |
320 | register struct en_softc *es = &en_softc[unit]; | |
321 | ||
b454c3ea BJ |
322 | /* |
323 | * Es_mask is a 16 bit number with n low zero bits, with | |
324 | * n the number of backoffs. When es_mask is 0 we have | |
325 | * backed off 16 times, and give up. | |
326 | */ | |
8a13b737 | 327 | if (es->es_mask == 0) { |
a453e1b5 | 328 | printf("en%d: send error\n", unit); |
8a13b737 | 329 | enxint(unit); |
b454c3ea | 330 | return; |
11720282 | 331 | } |
b454c3ea BJ |
332 | /* |
333 | * Another backoff. Restart with delay based on n low bits | |
334 | * of the interval timer. | |
335 | */ | |
336 | es->es_mask <<= 1; | |
337 | es->es_delay = mfpr(ICR) &~ es->es_mask; | |
338 | enstart(unit); | |
11720282 BJ |
339 | } |
340 | ||
31c2345c SL |
341 | struct sockaddr_pup pupsrc = { AF_PUP }; |
342 | struct sockaddr_pup pupdst = { AF_PUP }; | |
343 | struct sockproto pupproto = { PF_PUP }; | |
f1b2fa5b BJ |
344 | /* |
345 | * Ethernet interface receiver interrupt. | |
346 | * If input error just drop packet. | |
347 | * Otherwise purge input buffered data path and examine | |
348 | * packet to determine type. If can't determine length | |
349 | * from type, then have to drop packet. Othewise decapsulate | |
350 | * packet based on type and pass to type specific higher-level | |
351 | * input routine. | |
352 | */ | |
11720282 BJ |
353 | enrint(unit) |
354 | int unit; | |
355 | { | |
b454c3ea BJ |
356 | register struct en_softc *es = &en_softc[unit]; |
357 | struct endevice *addr = (struct endevice *)eninfo[unit]->ui_addr; | |
358 | register struct en_header *en; | |
8a13b737 | 359 | struct mbuf *m; |
038ee561 | 360 | int len; short resid; |
b454c3ea | 361 | register struct ifqueue *inq; |
8a13b737 | 362 | int off; |
11720282 | 363 | |
b454c3ea | 364 | es->es_if.if_ipackets++; |
f1b2fa5b BJ |
365 | |
366 | /* | |
b454c3ea | 367 | * Purge BDP; drop if input error indicated. |
f1b2fa5b | 368 | */ |
ee787340 SL |
369 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
370 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_r.ifrw_bdp); | |
941ee7ef | 371 | if (addr->en_istat&EN_IERROR) { |
f1b2fa5b | 372 | es->es_if.if_ierrors++; |
8a13b737 | 373 | goto setup; |
11720282 | 374 | } |
f1b2fa5b BJ |
375 | |
376 | /* | |
0658a645 | 377 | * Calculate input data length. |
f1b2fa5b BJ |
378 | * Get pointer to ethernet header (in input buffer). |
379 | * Deal with trailer protocol: if type is PUP trailer | |
380 | * get true type from first 16-bit word past data. | |
381 | * Remember that type was trailer by setting off. | |
382 | */ | |
0658a645 BJ |
383 | resid = addr->en_iwc; |
384 | if (resid) | |
385 | resid |= 0176000; | |
dc39362e | 386 | len = (((sizeof (struct en_header) + ENMRU) >> 1) + resid) << 1; |
0658a645 | 387 | len -= sizeof (struct en_header); |
dc39362e | 388 | if (len > ENMRU) |
0658a645 | 389 | goto setup; /* sanity */ |
f1b2fa5b | 390 | en = (struct en_header *)(es->es_ifuba.ifu_r.ifrw_addr); |
991f6240 | 391 | en->en_type = ntohs(en->en_type); |
8a13b737 | 392 | #define endataaddr(en, off, type) ((type)(((caddr_t)((en)+1)+(off)))) |
991f6240 SL |
393 | if (en->en_type >= ENTYPE_TRAIL && |
394 | en->en_type < ENTYPE_TRAIL+ENTYPE_NTRAILER) { | |
395 | off = (en->en_type - ENTYPE_TRAIL) * 512; | |
dc39362e | 396 | if (off > ENMTU) |
b454c3ea | 397 | goto setup; /* sanity */ |
991f6240 SL |
398 | en->en_type = ntohs(*endataaddr(en, off, u_short *)); |
399 | resid = ntohs(*(endataaddr(en, off+2, u_short *))); | |
0658a645 BJ |
400 | if (off + resid > len) |
401 | goto setup; /* sanity */ | |
402 | len = off + resid; | |
8a13b737 BJ |
403 | } else |
404 | off = 0; | |
8a13b737 BJ |
405 | if (len == 0) |
406 | goto setup; | |
c1b082c5 SL |
407 | #ifdef ENF_SWABIPS |
408 | if (es->es_if.if_flags & ENF_SWABIPS && en->en_type == ENTYPE_IP) | |
409 | enswab((caddr_t)(en + 1), (caddr_t)(en + 1), len); | |
410 | #endif | |
f1b2fa5b BJ |
411 | /* |
412 | * Pull packet off interface. Off is nonzero if packet | |
413 | * has trailing header; if_rubaget will then force this header | |
414 | * information to be at the front, but we still have to drop | |
0658a645 | 415 | * the type and length which are at the front of any trailer data. |
f1b2fa5b BJ |
416 | */ |
417 | m = if_rubaget(&es->es_ifuba, len, off); | |
a453e1b5 BJ |
418 | if (m == 0) |
419 | goto setup; | |
f1b2fa5b | 420 | if (off) { |
0658a645 BJ |
421 | m->m_off += 2 * sizeof (u_short); |
422 | m->m_len -= 2 * sizeof (u_short); | |
f1b2fa5b | 423 | } |
31c2345c SL |
424 | switch (en->en_type) { |
425 | ||
426 | #ifdef INET | |
991f6240 | 427 | case ENTYPE_IP: |
9c8692e9 | 428 | schednetisr(NETISR_IP); |
31c2345c SL |
429 | inq = &ipintrq; |
430 | break; | |
431 | #endif | |
ee787340 | 432 | #ifdef PUP |
991f6240 | 433 | case ENTYPE_PUP: { |
31c2345c SL |
434 | struct pup_header *pup = mtod(m, struct pup_header *); |
435 | ||
436 | pupproto.sp_protocol = pup->pup_type; | |
1c1d4563 SL |
437 | bcopy((caddr_t)pup->pup_dnet, (caddr_t)pupdst.spup_net, |
438 | sizeof (struct pupport)); | |
439 | bcopy((caddr_t)pup->pup_snet, (caddr_t)pupsrc.spup_net, | |
440 | sizeof (struct pupport)); | |
57aa3090 SL |
441 | raw_input(m, &pupproto, (struct sockaddr *)&pupsrc, |
442 | (struct sockaddr *)&pupdst); | |
31c2345c | 443 | goto setup; |
31c2345c | 444 | } |
ee787340 | 445 | #endif |
c8f8184f BJ |
446 | default: |
447 | m_freem(m); | |
448 | goto setup; | |
ee787340 SL |
449 | } |
450 | ||
1e977657 BJ |
451 | if (IF_QFULL(inq)) { |
452 | IF_DROP(inq); | |
ee787340 | 453 | m_freem(m); |
1e977657 BJ |
454 | } else |
455 | IF_ENQUEUE(inq, m); | |
f1b2fa5b | 456 | |
ae348eea | 457 | setup: |
f1b2fa5b BJ |
458 | /* |
459 | * Reset for next packet. | |
460 | */ | |
461 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; | |
dc39362e | 462 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
941ee7ef | 463 | addr->en_istat = EN_IEN|EN_GO; |
ae348eea | 464 | } |
11720282 | 465 | |
8a13b737 BJ |
466 | /* |
467 | * Ethernet output routine. | |
468 | * Encapsulate a packet of type family for the local net. | |
f1b2fa5b BJ |
469 | * Use trailer local net encapsulation if enough data in first |
470 | * packet leaves a multiple of 512 bytes of data in remainder. | |
8a13b737 | 471 | */ |
ee787340 | 472 | enoutput(ifp, m0, dst) |
8a13b737 BJ |
473 | struct ifnet *ifp; |
474 | struct mbuf *m0; | |
ee787340 | 475 | struct sockaddr *dst; |
11720282 | 476 | { |
8a2f82db | 477 | int type, dest, s, error; |
f1b2fa5b | 478 | register struct mbuf *m = m0; |
8a13b737 | 479 | register struct en_header *en; |
ee787340 | 480 | register int off; |
8a13b737 | 481 | |
ee787340 | 482 | switch (dst->sa_family) { |
11720282 | 483 | |
8a13b737 | 484 | #ifdef INET |
ee787340 | 485 | case AF_INET: |
4e818526 | 486 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
4fce3bf9 | 487 | if (in_lnaof(*((struct in_addr *)&dest)) >= 0x100) { |
8a2f82db | 488 | error = EPERM; /* ??? */ |
3734056d | 489 | goto bad; |
8a2f82db | 490 | } |
4e818526 | 491 | dest = (dest >> 24) & 0xff; |
ee787340 | 492 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
47695a10 SL |
493 | /* need per host negotiation */ |
494 | if ((ifp->if_flags & IFF_NOTRAILERS) == 0) | |
ee787340 | 495 | if (off > 0 && (off & 0x1ff) == 0 && |
0658a645 | 496 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { |
991f6240 | 497 | type = ENTYPE_TRAIL + (off>>9); |
0658a645 BJ |
498 | m->m_off -= 2 * sizeof (u_short); |
499 | m->m_len += 2 * sizeof (u_short); | |
991f6240 SL |
500 | *mtod(m, u_short *) = htons((u_short)ENTYPE_IP); |
501 | *(mtod(m, u_short *) + 1) = ntohs((u_short)m->m_len); | |
f1b2fa5b | 502 | goto gottrailertype; |
8a13b737 | 503 | } |
991f6240 | 504 | type = ENTYPE_IP; |
f1b2fa5b BJ |
505 | off = 0; |
506 | goto gottype; | |
8a13b737 | 507 | #endif |
31c2345c | 508 | #ifdef PUP |
ee787340 | 509 | case AF_PUP: |
1c1d4563 | 510 | dest = ((struct sockaddr_pup *)dst)->spup_host; |
991f6240 | 511 | type = ENTYPE_PUP; |
31c2345c SL |
512 | off = 0; |
513 | goto gottype; | |
31c2345c | 514 | #endif |
8a13b737 BJ |
515 | |
516 | default: | |
ee787340 SL |
517 | printf("en%d: can't handle af%d\n", ifp->if_unit, |
518 | dst->sa_family); | |
8a2f82db SL |
519 | error = EAFNOSUPPORT; |
520 | goto bad; | |
8a13b737 | 521 | } |
f1b2fa5b | 522 | |
b454c3ea | 523 | gottrailertype: |
f1b2fa5b BJ |
524 | /* |
525 | * Packet to be sent as trailer: move first packet | |
526 | * (control information) to end of chain. | |
527 | */ | |
f1b2fa5b BJ |
528 | while (m->m_next) |
529 | m = m->m_next; | |
530 | m->m_next = m0; | |
531 | m = m0->m_next; | |
532 | m0->m_next = 0; | |
b454c3ea | 533 | m0 = m; |
f1b2fa5b | 534 | |
b454c3ea | 535 | gottype: |
f1b2fa5b BJ |
536 | /* |
537 | * Add local net header. If no space in first mbuf, | |
538 | * allocate another. | |
539 | */ | |
a453e1b5 BJ |
540 | if (m->m_off > MMAXOFF || |
541 | MMINOFF + sizeof (struct en_header) > m->m_off) { | |
cce93e4b | 542 | m = m_get(M_DONTWAIT, MT_HEADER); |
8a13b737 | 543 | if (m == 0) { |
8a2f82db SL |
544 | error = ENOBUFS; |
545 | goto bad; | |
8a13b737 BJ |
546 | } |
547 | m->m_next = m0; | |
548 | m->m_off = MMINOFF; | |
549 | m->m_len = sizeof (struct en_header); | |
550 | } else { | |
8a13b737 BJ |
551 | m->m_off -= sizeof (struct en_header); |
552 | m->m_len += sizeof (struct en_header); | |
11720282 | 553 | } |
8a13b737 BJ |
554 | en = mtod(m, struct en_header *); |
555 | en->en_shost = ifp->if_host[0]; | |
556 | en->en_dhost = dest; | |
991f6240 | 557 | en->en_type = htons((u_short)type); |
f1b2fa5b BJ |
558 | |
559 | /* | |
560 | * Queue message on interface, and start output if interface | |
561 | * not yet active. | |
562 | */ | |
8a13b737 | 563 | s = splimp(); |
1e977657 BJ |
564 | if (IF_QFULL(&ifp->if_snd)) { |
565 | IF_DROP(&ifp->if_snd); | |
8a2f82db SL |
566 | error = ENOBUFS; |
567 | goto qfull; | |
1e977657 | 568 | } |
8a13b737 | 569 | IF_ENQUEUE(&ifp->if_snd, m); |
8a13b737 BJ |
570 | if (en_softc[ifp->if_unit].es_oactive == 0) |
571 | enstart(ifp->if_unit); | |
89413846 | 572 | splx(s); |
4e818526 | 573 | return (0); |
8a2f82db SL |
574 | qfull: |
575 | m0 = m; | |
576 | splx(s); | |
577 | bad: | |
578 | m_freem(m0); | |
579 | return (error); | |
11720282 | 580 | } |
47695a10 SL |
581 | |
582 | /* | |
583 | * Process an ioctl request. | |
584 | */ | |
585 | enioctl(ifp, cmd, data) | |
586 | register struct ifnet *ifp; | |
587 | int cmd; | |
588 | caddr_t data; | |
589 | { | |
590 | struct ifreq *ifr = (struct ifreq *)data; | |
591 | int s = splimp(), error = 0; | |
592 | ||
593 | switch (cmd) { | |
594 | ||
595 | case SIOCSIFADDR: | |
596 | if (ifp->if_flags & IFF_RUNNING) | |
597 | if_rtinit(ifp, -1); /* delete previous route */ | |
598 | ensetaddr(ifp, (struct sockaddr_in *)&ifr->ifr_addr); | |
599 | if (ifp->if_flags & IFF_RUNNING) | |
600 | if_rtinit(ifp, RTF_UP); | |
601 | else | |
602 | eninit(ifp->if_unit); | |
603 | break; | |
604 | ||
605 | default: | |
606 | error = EINVAL; | |
607 | } | |
608 | splx(s); | |
609 | return (error); | |
610 | } | |
611 | ||
612 | ensetaddr(ifp, sin) | |
613 | register struct ifnet *ifp; | |
614 | register struct sockaddr_in *sin; | |
615 | { | |
616 | struct endevice *enaddr; | |
617 | ||
618 | ifp->if_net = in_netof(sin->sin_addr); | |
619 | enaddr = (struct endevice *)eninfo[ifp->if_unit]->ui_addr; | |
620 | ifp->if_host[0] = (~enaddr->en_addr) & 0xff; | |
621 | sin = (struct sockaddr_in *)&ifp->if_addr; | |
622 | sin->sin_family = AF_INET; | |
623 | sin->sin_addr = if_makeaddr(ifp->if_net, ifp->if_host[0]); | |
624 | sin = (struct sockaddr_in *)&ifp->if_broadaddr; | |
625 | sin->sin_family = AF_INET; | |
626 | sin->sin_addr = if_makeaddr(ifp->if_net, INADDR_ANY); | |
627 | ifp->if_flags |= IFF_BROADCAST; | |
628 | } | |
c1b082c5 SL |
629 | |
630 | #ifdef ENF_SWABIPS | |
631 | /* | |
632 | * Swab bytes | |
633 | * Jeffrey Mogul, Stanford | |
634 | */ | |
635 | enswab(from, to, n) | |
636 | register caddr_t *from, *to; | |
637 | register int n; | |
638 | { | |
639 | register unsigned long temp; | |
640 | ||
641 | n >>= 1; n++; | |
642 | #define STEP temp = *from++,*to++ = *from++,*to++ = temp | |
643 | /* round to multiple of 8 */ | |
644 | while ((--n) & 07) | |
645 | STEP; | |
646 | n >>= 3; | |
647 | while (--n >= 0) { | |
648 | STEP; STEP; STEP; STEP; | |
649 | STEP; STEP; STEP; STEP; | |
650 | } | |
651 | } | |
652 | #endif |