| 1 | /* if_imp.c 4.34 82/06/14 */ |
| 2 | |
| 3 | #include "imp.h" |
| 4 | #if NIMP > 0 |
| 5 | /* |
| 6 | * ARPANET IMP interface driver. |
| 7 | * |
| 8 | * The IMP-host protocol is handled here, leaving |
| 9 | * hardware specifics to the lower level interface driver. |
| 10 | */ |
| 11 | #include "../h/param.h" |
| 12 | #include "../h/systm.h" |
| 13 | #include "../h/mbuf.h" |
| 14 | #include "../h/pte.h" |
| 15 | #include "../h/buf.h" |
| 16 | #include "../h/protosw.h" |
| 17 | #include "../h/socket.h" |
| 18 | #include "../h/ubareg.h" |
| 19 | #include "../h/ubavar.h" |
| 20 | #include "../h/cpu.h" |
| 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 | #define IMPLEADERS |
| 27 | #include "../net/if_imp.h" |
| 28 | #include "../net/if_imphost.h" |
| 29 | #include "../net/ip.h" |
| 30 | #include "../net/ip_var.h" |
| 31 | #include "../net/route.h" |
| 32 | #include <errno.h> |
| 33 | |
| 34 | /* |
| 35 | * IMP software status per interface. |
| 36 | * (partially shared with the hardware specific module) |
| 37 | * |
| 38 | * Each interface is referenced by a network interface structure, |
| 39 | * imp_if, which the routing code uses to locate the interface. |
| 40 | * This structure contains the output queue for the interface, its |
| 41 | * address, ... IMP specific structures used in connecting the |
| 42 | * IMP software modules to the hardware specific interface routines |
| 43 | * are stored here. The common structures are made visible to the |
| 44 | * interface driver by passing a pointer to the hardware routine |
| 45 | * at "attach" time. |
| 46 | * |
| 47 | * NOTE: imp_if and imp_cb are assumed adjacent in hardware code. |
| 48 | */ |
| 49 | struct imp_softc { |
| 50 | struct ifnet imp_if; /* network visible interface */ |
| 51 | struct impcb imp_cb; /* hooks to hardware module */ |
| 52 | u_char imp_state; /* current state of IMP */ |
| 53 | char imp_dropcnt; /* used during initialization */ |
| 54 | } imp_softc[NIMP]; |
| 55 | |
| 56 | /* |
| 57 | * Messages from IMP regarding why |
| 58 | * it's going down. |
| 59 | */ |
| 60 | static char *impmessage[] = { |
| 61 | "in 30 seconds", |
| 62 | "for hardware PM", |
| 63 | "to reload software", |
| 64 | "for emergency reset" |
| 65 | }; |
| 66 | |
| 67 | int impdown(), impinit(), impoutput(); |
| 68 | |
| 69 | /* |
| 70 | * IMP attach routine. Called from hardware device attach routine |
| 71 | * at configuration time with a pointer to the UNIBUS device structure. |
| 72 | * Sets up local state and returns pointer to base of ifnet+impcb |
| 73 | * structures. This is then used by the device's attach routine |
| 74 | * set up its back pointers. |
| 75 | */ |
| 76 | impattach(ui) |
| 77 | struct uba_device *ui; |
| 78 | { |
| 79 | struct imp_softc *sc = &imp_softc[ui->ui_unit]; |
| 80 | register struct ifnet *ifp = &sc->imp_if; |
| 81 | struct sockaddr_in *sin; |
| 82 | |
| 83 | COUNT(IMPATTACH); |
| 84 | /* UNIT COULD BE AMBIGUOUS */ |
| 85 | ifp->if_unit = ui->ui_unit; |
| 86 | ifp->if_name = "imp"; |
| 87 | ifp->if_mtu = IMPMTU - sizeof(struct imp_leader); |
| 88 | ifp->if_net = ui->ui_flags; |
| 89 | /* the host and imp fields will be filled in by the imp */ |
| 90 | sin = (struct sockaddr_in *)&ifp->if_addr; |
| 91 | sin->sin_family = AF_INET; |
| 92 | sin->sin_addr = if_makeaddr(ifp->if_net, 0); |
| 93 | ifp->if_init = impinit; |
| 94 | ifp->if_output = impoutput; |
| 95 | /* reset is handled at the hardware level */ |
| 96 | if_attach(ifp); |
| 97 | return ((int)&sc->imp_if); |
| 98 | } |
| 99 | |
| 100 | /* |
| 101 | * IMP initialization routine: call hardware module to |
| 102 | * setup UNIBUS resources, init state and get ready for |
| 103 | * NOOPs the IMP should send us, and that we want to drop. |
| 104 | */ |
| 105 | impinit(unit) |
| 106 | int unit; |
| 107 | { |
| 108 | int s = splimp(); |
| 109 | register struct imp_softc *sc = &imp_softc[unit]; |
| 110 | |
| 111 | COUNT(IMPINIT); |
| 112 | if ((*sc->imp_cb.ic_init)(unit) == 0) { |
| 113 | sc->imp_state = IMPS_DOWN; |
| 114 | sc->imp_if.if_flags &= ~IFF_UP; |
| 115 | splx(s); |
| 116 | return; |
| 117 | } |
| 118 | sc->imp_state = IMPS_INIT; |
| 119 | impnoops(sc); |
| 120 | if_rtinit(&sc->imp_if, RTF_UP); |
| 121 | splx(s); |
| 122 | } |
| 123 | |
| 124 | struct sockproto impproto = { PF_IMPLINK }; |
| 125 | struct sockaddr_in impdst = { AF_IMPLINK }; |
| 126 | struct sockaddr_in impsrc = { AF_IMPLINK }; |
| 127 | int impprintfs = 0; |
| 128 | |
| 129 | /* |
| 130 | * ARPAnet 1822 input routine. |
| 131 | * Called from hardware input interrupt routine to handle 1822 |
| 132 | * IMP-host messages. Type 0 messages (non-control) are |
| 133 | * passed to higher level protocol processors on the basis |
| 134 | * of link number. Other type messages (control) are handled here. |
| 135 | */ |
| 136 | impinput(unit, m) |
| 137 | int unit; |
| 138 | register struct mbuf *m; |
| 139 | { |
| 140 | register struct imp_leader *ip; |
| 141 | register struct imp_softc *sc = &imp_softc[unit]; |
| 142 | register struct host *hp; |
| 143 | register struct ifqueue *inq; |
| 144 | struct control_leader *cp; |
| 145 | struct in_addr addr; |
| 146 | struct mbuf *next; |
| 147 | struct sockaddr_in *sin; |
| 148 | |
| 149 | COUNT(IMPINPUT); |
| 150 | /* verify leader length. */ |
| 151 | if (m->m_len < sizeof(struct control_leader) && |
| 152 | (m = m_pullup(m, sizeof(struct control_leader))) == 0) |
| 153 | return; |
| 154 | cp = mtod(m, struct control_leader *); |
| 155 | if (cp->dl_mtype == IMPTYPE_DATA) |
| 156 | if (m->m_len < sizeof(struct imp_leader) && |
| 157 | (m = m_pullup(m, sizeof(struct imp_leader))) == 0) |
| 158 | return; |
| 159 | ip = mtod(m, struct imp_leader *); |
| 160 | if (impprintfs) |
| 161 | printleader("impinput", ip); |
| 162 | |
| 163 | /* check leader type */ |
| 164 | if (ip->il_format != IMP_NFF) { |
| 165 | sc->imp_if.if_collisions++; /* XXX */ |
| 166 | goto drop; |
| 167 | } |
| 168 | |
| 169 | if (ip->il_mtype != IMPTYPE_DATA) { |
| 170 | #ifdef notdef |
| 171 | addr.s_net = ip->il_network; |
| 172 | #else |
| 173 | addr.s_net = sc->imp_if.if_net; |
| 174 | #endif |
| 175 | addr.s_imp = ip->il_imp; |
| 176 | addr.s_host = ip->il_host; |
| 177 | } |
| 178 | switch (ip->il_mtype) { |
| 179 | |
| 180 | case IMPTYPE_DATA: |
| 181 | break; |
| 182 | |
| 183 | /* |
| 184 | * IMP leader error. Reset the IMP and discard the packet. |
| 185 | */ |
| 186 | case IMPTYPE_BADLEADER: |
| 187 | /* |
| 188 | * According to 1822 document, this message |
| 189 | * will be generated in response to the |
| 190 | * first noop sent to the IMP after |
| 191 | * the host resets the IMP interface. |
| 192 | */ |
| 193 | if (sc->imp_state != IMPS_INIT) { |
| 194 | impmsg(sc, "leader error"); |
| 195 | hostreset(sc->imp_if.if_net); |
| 196 | impnoops(sc); |
| 197 | } |
| 198 | goto drop; |
| 199 | |
| 200 | /* |
| 201 | * IMP going down. Print message, and if not immediate, |
| 202 | * set off a timer to insure things will be reset at the |
| 203 | * appropriate time. |
| 204 | */ |
| 205 | case IMPTYPE_DOWN: |
| 206 | if (sc->imp_state < IMPS_INIT) |
| 207 | goto drop; |
| 208 | if ((ip->il_link & IMP_DMASK) == 0) { |
| 209 | sc->imp_state = IMPS_GOINGDOWN; |
| 210 | timeout(impdown, (caddr_t)sc, 30 * hz); |
| 211 | } |
| 212 | impmsg(sc, "going down %s", |
| 213 | (u_int)impmessage[ip->il_link&IMP_DMASK]); |
| 214 | goto drop; |
| 215 | |
| 216 | /* |
| 217 | * A NOP usually seen during the initialization sequence. |
| 218 | * Compare the local address with that in the message. |
| 219 | * Reset the local address notion if it doesn't match. |
| 220 | */ |
| 221 | case IMPTYPE_NOOP: |
| 222 | if (sc->imp_state == IMPS_DOWN) { |
| 223 | sc->imp_state = IMPS_INIT; |
| 224 | sc->imp_dropcnt = IMP_DROPCNT; |
| 225 | } |
| 226 | if (sc->imp_state == IMPS_INIT && --sc->imp_dropcnt > 0) |
| 227 | goto drop; |
| 228 | sin = (struct sockaddr_in *)&sc->imp_if.if_addr; |
| 229 | if (sin->sin_addr.s_host != ip->il_host || |
| 230 | sin->sin_addr.s_imp != ip->il_imp) { |
| 231 | sc->imp_if.if_host[0] = |
| 232 | sin->sin_addr.s_host = ip->il_host; |
| 233 | sin->sin_addr.s_imp = ip->il_imp; |
| 234 | impmsg(sc, "reset (host %d/imp %d)", (u_int)ip->il_host, |
| 235 | ntohs(ip->il_imp)); |
| 236 | } |
| 237 | sc->imp_state = IMPS_UP; |
| 238 | sc->imp_if.if_flags |= IFF_UP; |
| 239 | #ifdef notdef |
| 240 | /* restart output in case something was q'd */ |
| 241 | if (sc->imp_cb.ic_oactive == 0) |
| 242 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); |
| 243 | #endif |
| 244 | goto drop; |
| 245 | |
| 246 | /* |
| 247 | * RFNM or INCOMPLETE message, send next |
| 248 | * message on the q. We could pass incomplete's |
| 249 | * up to the next level, but this currently isn't |
| 250 | * needed. |
| 251 | */ |
| 252 | case IMPTYPE_RFNM: |
| 253 | case IMPTYPE_INCOMPLETE: |
| 254 | if (hp = hostlookup(addr)) { |
| 255 | if (hp->h_rfnm == 0) |
| 256 | hp->h_flags &= ~HF_INUSE; |
| 257 | else if (next = hostdeque(hp)) |
| 258 | (void) impsnd(&sc->imp_if, next); |
| 259 | } |
| 260 | goto drop; |
| 261 | |
| 262 | /* |
| 263 | * Host or IMP can't be reached. Flush any packets |
| 264 | * awaiting transmission and release the host structure. |
| 265 | */ |
| 266 | case IMPTYPE_HOSTDEAD: |
| 267 | case IMPTYPE_HOSTUNREACH: { |
| 268 | int s = splnet(); |
| 269 | impnotify(ip->il_mtype, ip, hostlookup(addr)); |
| 270 | splx(s); |
| 271 | goto rawlinkin; |
| 272 | } |
| 273 | |
| 274 | /* |
| 275 | * Error in data. Clear RFNM status for this host and send |
| 276 | * noops to the IMP to clear the interface. |
| 277 | */ |
| 278 | case IMPTYPE_BADDATA: { |
| 279 | int s; |
| 280 | |
| 281 | impmsg(sc, "data error"); |
| 282 | s = splnet(); |
| 283 | if (hp = hostlookup(addr)) |
| 284 | hp->h_rfnm = 0; |
| 285 | splx(s); |
| 286 | impnoops(sc); |
| 287 | goto drop; |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * Interface reset. |
| 292 | */ |
| 293 | case IMPTYPE_RESET: |
| 294 | impmsg(sc, "interface reset"); |
| 295 | impnoops(sc); |
| 296 | goto drop; |
| 297 | |
| 298 | default: |
| 299 | sc->imp_if.if_collisions++; /* XXX */ |
| 300 | goto drop; |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * Data for a protocol. Dispatch to the appropriate |
| 305 | * protocol routine (running at software interrupt). |
| 306 | * If this isn't a raw interface, advance pointer |
| 307 | * into mbuf past leader. |
| 308 | */ |
| 309 | switch (ip->il_link) { |
| 310 | |
| 311 | #ifdef INET |
| 312 | case IMPLINK_IP: |
| 313 | m->m_len -= sizeof(struct imp_leader); |
| 314 | m->m_off += sizeof(struct imp_leader); |
| 315 | schednetisr(NETISR_IP); |
| 316 | inq = &ipintrq; |
| 317 | break; |
| 318 | #endif |
| 319 | |
| 320 | default: |
| 321 | rawlinkin: |
| 322 | impproto.sp_protocol = ip->il_link; |
| 323 | sin = (struct sockaddr_in *)&sc->imp_if.if_addr; |
| 324 | impdst.sin_addr = sin->sin_addr;; |
| 325 | impsrc.sin_addr.s_net = ip->il_network; |
| 326 | impsrc.sin_addr.s_host = ip->il_host; |
| 327 | impsrc.sin_addr.s_imp = ip->il_imp; |
| 328 | raw_input(m, &impproto, (struct sockaddr *)&impsrc, |
| 329 | (struct sockaddr *)&impdst); |
| 330 | return; |
| 331 | } |
| 332 | if (IF_QFULL(inq)) { |
| 333 | IF_DROP(inq); |
| 334 | goto drop; |
| 335 | } |
| 336 | IF_ENQUEUE(inq, m); |
| 337 | return; |
| 338 | |
| 339 | drop: |
| 340 | m_freem(m); |
| 341 | } |
| 342 | |
| 343 | /* |
| 344 | * Bring the IMP down after notification. |
| 345 | */ |
| 346 | impdown(sc) |
| 347 | struct imp_softc *sc; |
| 348 | { |
| 349 | |
| 350 | COUNT(IMPDOWN); |
| 351 | sc->imp_state = IMPS_DOWN; |
| 352 | impmsg(sc, "marked down"); |
| 353 | hostreset(sc->imp_if.if_net); |
| 354 | if_down(&sc->imp_if); |
| 355 | } |
| 356 | |
| 357 | /*VARARGS*/ |
| 358 | impmsg(sc, fmt, a1, a2) |
| 359 | struct imp_softc *sc; |
| 360 | char *fmt; |
| 361 | u_int a1; |
| 362 | { |
| 363 | |
| 364 | COUNT(IMPMSG); |
| 365 | printf("imp%d: ", sc->imp_if.if_unit); |
| 366 | printf(fmt, a1, a2); |
| 367 | printf("\n"); |
| 368 | } |
| 369 | |
| 370 | /* |
| 371 | * Process an IMP "error" message, passing this |
| 372 | * up to the higher level protocol. |
| 373 | */ |
| 374 | impnotify(what, cp, hp) |
| 375 | int what; |
| 376 | struct control_leader *cp; |
| 377 | struct host *hp; |
| 378 | { |
| 379 | struct in_addr in; |
| 380 | |
| 381 | COUNT(IMPNOTIFY); |
| 382 | #ifdef notdef |
| 383 | in.s_net = cp->dl_network; |
| 384 | #else |
| 385 | in.s_net = 10; /* XXX */ |
| 386 | #endif |
| 387 | in.s_host = cp->dl_host; |
| 388 | in.s_imp = cp->dl_imp; |
| 389 | if (cp->dl_link != IMPLINK_IP) |
| 390 | raw_ctlinput(what, (caddr_t)&in); |
| 391 | else |
| 392 | ip_ctlinput(what, (caddr_t)&in); |
| 393 | if (hp) { |
| 394 | hp->h_flags |= (1 << what); |
| 395 | hostfree(hp); |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * ARPAnet 1822 output routine. |
| 401 | * Called from higher level protocol routines to set up messages for |
| 402 | * transmission to the imp. Sets up the header and calls impsnd to |
| 403 | * enqueue the message for this IMP's hardware driver. |
| 404 | */ |
| 405 | impoutput(ifp, m0, dst) |
| 406 | register struct ifnet *ifp; |
| 407 | struct mbuf *m0; |
| 408 | struct sockaddr *dst; |
| 409 | { |
| 410 | register struct imp_leader *imp; |
| 411 | register struct mbuf *m = m0; |
| 412 | int x, dhost, dimp, dlink, len, dnet; |
| 413 | int error = 0; |
| 414 | |
| 415 | COUNT(IMPOUTPUT); |
| 416 | /* |
| 417 | * Don't even try if the IMP is unavailable. |
| 418 | */ |
| 419 | if (imp_softc[ifp->if_unit].imp_state != IMPS_UP) { |
| 420 | error = ENETDOWN; |
| 421 | goto drop; |
| 422 | } |
| 423 | |
| 424 | switch (dst->sa_family) { |
| 425 | |
| 426 | #ifdef INET |
| 427 | case AF_INET: { |
| 428 | struct ip *ip = mtod(m0, struct ip *); |
| 429 | struct sockaddr_in *sin = (struct sockaddr_in *)dst; |
| 430 | |
| 431 | dhost = sin->sin_addr.s_host; |
| 432 | dimp = sin->sin_addr.s_impno; |
| 433 | dlink = IMPLINK_IP; |
| 434 | dnet = 0; |
| 435 | len = ntohs((u_short)ip->ip_len); |
| 436 | break; |
| 437 | } |
| 438 | #endif |
| 439 | case AF_IMPLINK: |
| 440 | goto leaderexists; |
| 441 | |
| 442 | default: |
| 443 | printf("imp%d: can't handle af%d\n", ifp->if_unit, |
| 444 | dst->sa_family); |
| 445 | error = EAFNOSUPPORT; |
| 446 | goto drop; |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * Add IMP leader. If there's not enough space in the |
| 451 | * first mbuf, allocate another. If that should fail, we |
| 452 | * drop this sucker. |
| 453 | */ |
| 454 | if (m->m_off > MMAXOFF || |
| 455 | MMINOFF + sizeof(struct imp_leader) > m->m_off) { |
| 456 | m = m_get(M_DONTWAIT); |
| 457 | if (m == 0) { |
| 458 | error = ENOBUFS; |
| 459 | goto drop; |
| 460 | } |
| 461 | m->m_next = m0; |
| 462 | m->m_off = MMINOFF; |
| 463 | m->m_len = sizeof(struct imp_leader); |
| 464 | } else { |
| 465 | m->m_off -= sizeof(struct imp_leader); |
| 466 | m->m_len += sizeof(struct imp_leader); |
| 467 | } |
| 468 | imp = mtod(m, struct imp_leader *); |
| 469 | imp->il_format = IMP_NFF; |
| 470 | imp->il_mtype = IMPTYPE_DATA; |
| 471 | imp->il_network = dnet; |
| 472 | imp->il_host = dhost; |
| 473 | imp->il_imp = htons((u_short)dimp); |
| 474 | imp->il_length = |
| 475 | htons((u_short)(len + sizeof(struct imp_leader)) << 3); |
| 476 | imp->il_link = dlink; |
| 477 | imp->il_flags = imp->il_htype = imp->il_subtype = 0; |
| 478 | |
| 479 | leaderexists: |
| 480 | return (impsnd(ifp, m)); |
| 481 | drop: |
| 482 | m_freem(m0); |
| 483 | return (error); |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * Put a message on an interface's output queue. |
| 488 | * Perform RFNM counting: no more than 8 message may be |
| 489 | * in flight to any one host. |
| 490 | */ |
| 491 | impsnd(ifp, m) |
| 492 | struct ifnet *ifp; |
| 493 | struct mbuf *m; |
| 494 | { |
| 495 | register struct imp_leader *ip; |
| 496 | register struct host *hp; |
| 497 | struct impcb *icp; |
| 498 | int s, error; |
| 499 | |
| 500 | COUNT(IMPSND); |
| 501 | ip = mtod(m, struct imp_leader *); |
| 502 | |
| 503 | /* |
| 504 | * Do RFNM counting for data messages |
| 505 | * (no more than 8 outstanding to any host) |
| 506 | */ |
| 507 | s = splimp(); |
| 508 | if (ip->il_mtype == IMPTYPE_DATA) { |
| 509 | struct in_addr addr; |
| 510 | |
| 511 | #ifdef notdef |
| 512 | addr.s_net = ip->il_network; |
| 513 | #else |
| 514 | addr.s_net = ifp->if_net; /* XXX */ |
| 515 | #endif |
| 516 | addr.s_host = ip->il_host; |
| 517 | addr.s_imp = ip->il_imp; |
| 518 | if ((hp = hostlookup(addr)) == 0) |
| 519 | hp = hostenter(addr); |
| 520 | if (hp && (hp->h_flags & (HF_DEAD|HF_UNREACH))) { |
| 521 | error = hp->h_flags&HF_DEAD ? EHOSTDOWN : EHOSTUNREACH; |
| 522 | hp->h_timer = HOSTTIMER; |
| 523 | hp->h_flags &= ~HF_INUSE; |
| 524 | goto bad; |
| 525 | } |
| 526 | |
| 527 | /* |
| 528 | * If IMP would block, queue until RFNM |
| 529 | */ |
| 530 | if (hp) { |
| 531 | if (hp->h_rfnm < 8) { |
| 532 | hp->h_rfnm++; |
| 533 | goto enque; |
| 534 | } |
| 535 | if (hp->h_qcnt < 8) { /* high water mark */ |
| 536 | HOST_ENQUE(hp, m); |
| 537 | goto start; |
| 538 | } |
| 539 | } |
| 540 | error = ENOBUFS; |
| 541 | goto bad; |
| 542 | } |
| 543 | enque: |
| 544 | if (IF_QFULL(&ifp->if_snd)) { |
| 545 | IF_DROP(&ifp->if_snd); |
| 546 | error = ENOBUFS; |
| 547 | bad: |
| 548 | m_freem(m); |
| 549 | splx(s); |
| 550 | return (error); |
| 551 | } |
| 552 | IF_ENQUEUE(&ifp->if_snd, m); |
| 553 | start: |
| 554 | icp = &imp_softc[ifp->if_unit].imp_cb; |
| 555 | if (icp->ic_oactive == 0) |
| 556 | (*icp->ic_start)(ifp->if_unit); |
| 557 | splx(s); |
| 558 | return (0); |
| 559 | } |
| 560 | |
| 561 | /* |
| 562 | * Put three 1822 NOOPs at the head of the output queue. |
| 563 | * Part of host-IMP initialization procedure. |
| 564 | * (Should return success/failure, but noone knows |
| 565 | * what to do with this, so why bother?) |
| 566 | * This routine is always called at splimp, so we don't |
| 567 | * protect the call to IF_PREPEND. |
| 568 | */ |
| 569 | impnoops(sc) |
| 570 | register struct imp_softc *sc; |
| 571 | { |
| 572 | register i; |
| 573 | register struct mbuf *m; |
| 574 | register struct control_leader *cp; |
| 575 | int x; |
| 576 | |
| 577 | COUNT(IMPNOOPS); |
| 578 | sc->imp_dropcnt = IMP_DROPCNT; |
| 579 | for (i = 0; i < IMP_DROPCNT + 1; i++ ) { |
| 580 | if ((m = m_getclr(M_DONTWAIT)) == 0) |
| 581 | return; |
| 582 | m->m_off = MMINOFF; |
| 583 | m->m_len = sizeof(struct control_leader); |
| 584 | cp = mtod(m, struct control_leader *); |
| 585 | cp->dl_format = IMP_NFF; |
| 586 | cp->dl_link = i; |
| 587 | cp->dl_mtype = IMPTYPE_NOOP; |
| 588 | IF_PREPEND(&sc->imp_if.if_snd, m); |
| 589 | } |
| 590 | if (sc->imp_cb.ic_oactive == 0) |
| 591 | (*sc->imp_cb.ic_start)(sc->imp_if.if_unit); |
| 592 | } |
| 593 | |
| 594 | #ifdef IMPLEADERS |
| 595 | printleader(routine, ip) |
| 596 | char *routine; |
| 597 | register struct imp_leader *ip; |
| 598 | { |
| 599 | printf("%s: ", routine); |
| 600 | printbyte((char *)ip, 12); |
| 601 | printf("<fmt=%x,net=%x,flags=%x,mtype=", ip->il_format, ip->il_network, |
| 602 | ip->il_flags); |
| 603 | if (ip->il_mtype <= IMPTYPE_READY) |
| 604 | printf("%s,", impleaders[ip->il_mtype]); |
| 605 | else |
| 606 | printf("%x,", ip->il_mtype); |
| 607 | printf("htype=%x,host=%x,imp=%x,link=", ip->il_htype, ip->il_host, |
| 608 | ntohs(ip->il_imp)); |
| 609 | if (ip->il_link == IMPLINK_IP) |
| 610 | printf("ip,"); |
| 611 | else |
| 612 | printf("%x,", ip->il_link); |
| 613 | printf("subtype=%x,len=%x>\n",ip->il_subtype,ntohs(ip->il_length)>>3); |
| 614 | } |
| 615 | |
| 616 | printbyte(cp, n) |
| 617 | register char *cp; |
| 618 | int n; |
| 619 | { |
| 620 | register i, j, c; |
| 621 | |
| 622 | for (i=0; i<n; i++) { |
| 623 | c = *cp++; |
| 624 | for (j=0; j<2; j++) |
| 625 | putchar("0123456789abcdef"[(c>>((1-j)*4))&0xf]); |
| 626 | putchar(' '); |
| 627 | } |
| 628 | putchar('\n'); |
| 629 | } |
| 630 | #endif |
| 631 | #endif |