ng_lmi.c revision 259065
1130368Smlaier/* 2130365Smlaier * ng_lmi.c 3130365Smlaier */ 4130365Smlaier 5130365Smlaier/*- 6130365Smlaier * Copyright (c) 1996-1999 Whistle Communications, Inc. 7130365Smlaier * All rights reserved. 8130365Smlaier * 9130365Smlaier * Subject to the following obligations and disclaimer of warranty, use and 10130365Smlaier * redistribution of this software, in source or object code forms, with or 11130365Smlaier * without modifications are expressly permitted by Whistle Communications; 12130365Smlaier * provided, however, that: 13130365Smlaier * 1. Any and all reproductions of the source or object code must include the 14130365Smlaier * copyright notice above and the following disclaimer of warranties; and 15130365Smlaier * 2. No rights are granted, in any manner or form, to use Whistle 16130365Smlaier * Communications, Inc. trademarks, including the mark "WHISTLE 17130365Smlaier * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 18130365Smlaier * such appears in the above copyright notice or in the software. 19130365Smlaier * 20130365Smlaier * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 21130365Smlaier * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 22130365Smlaier * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 23130365Smlaier * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 24130365Smlaier * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 25130365Smlaier * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 26130365Smlaier * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 27130365Smlaier * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 28130365Smlaier * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 29130365Smlaier * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 30130365Smlaier * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 31130365Smlaier * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 32130365Smlaier * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 33130365Smlaier * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34130365Smlaier * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35130365Smlaier * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 36130365Smlaier * OF SUCH DAMAGE. 37130365Smlaier * 38130365Smlaier * Author: Julian Elischer <julian@freebsd.org> 39130365Smlaier * 40130365Smlaier * $FreeBSD: releng/10.0/sys/netgraph/ng_lmi.c 243882 2012-12-05 08:04:20Z glebius $ 41130365Smlaier * $Whistle: ng_lmi.c,v 1.38 1999/11/01 09:24:52 julian Exp $ 42130365Smlaier */ 43130365Smlaier 44130365Smlaier/* 45130365Smlaier * This node performs the frame relay LMI protocol. It knows how 46130365Smlaier * to do ITU Annex A, ANSI Annex D, and "Group-of-Four" variants 47130365Smlaier * of the protocol. 48130365Smlaier * 49130365Smlaier * A specific protocol can be forced by connecting the corresponding 50130365Smlaier * hook to DLCI 0 or 1023 (as appropriate) of a frame relay link. 51130365Smlaier * 52130365Smlaier * Alternately, this node can do auto-detection of the LMI protocol 53130365Smlaier * by connecting hook "auto0" to DLCI 0 and "auto1023" to DLCI 1023. 54130365Smlaier */ 55130365Smlaier 56130365Smlaier#include <sys/param.h> 57130365Smlaier#include <sys/systm.h> 58130365Smlaier#include <sys/errno.h> 59130365Smlaier#include <sys/kernel.h> 60130365Smlaier#include <sys/malloc.h> 61130365Smlaier#include <sys/mbuf.h> 62130365Smlaier#include <sys/syslog.h> 63130365Smlaier#include <netgraph/ng_message.h> 64130365Smlaier#include <netgraph/netgraph.h> 65130365Smlaier#include <netgraph/ng_lmi.h> 66130365Smlaier 67130365Smlaier/* 68130365Smlaier * Human readable names for LMI 69130365Smlaier */ 70130365Smlaier#define NAME_ANNEXA NG_LMI_HOOK_ANNEXA 71130365Smlaier#define NAME_ANNEXD NG_LMI_HOOK_ANNEXD 72130365Smlaier#define NAME_GROUP4 NG_LMI_HOOK_GROUPOF4 73130365Smlaier#define NAME_NONE "None" 74130365Smlaier 75130365Smlaier#define MAX_DLCIS 128 76130365Smlaier#define MAXDLCI 1023 77130365Smlaier 78130365Smlaier/* 79130365Smlaier * DLCI states 80130365Smlaier */ 81130365Smlaier#define DLCI_NULL 0 82130365Smlaier#define DLCI_UP 1 83130365Smlaier#define DLCI_DOWN 2 84130365Smlaier 85130365Smlaier/* 86130365Smlaier * Any received LMI frame should be at least this long 87130365Smlaier */ 88130365Smlaier#define LMI_MIN_LENGTH 8 /* XXX verify */ 89130365Smlaier 90130365Smlaier/* 91130365Smlaier * Netgraph node methods and type descriptor 92130365Smlaier */ 93130365Smlaierstatic ng_constructor_t nglmi_constructor; 94130365Smlaierstatic ng_rcvmsg_t nglmi_rcvmsg; 95130365Smlaierstatic ng_shutdown_t nglmi_shutdown; 96130365Smlaierstatic ng_newhook_t nglmi_newhook; 97130365Smlaierstatic ng_rcvdata_t nglmi_rcvdata; 98130365Smlaierstatic ng_disconnect_t nglmi_disconnect; 99130365Smlaierstatic int nglmi_checkdata(hook_p hook, struct mbuf *m); 100130365Smlaier 101130365Smlaierstatic struct ng_type typestruct = { 102130365Smlaier .version = NG_ABI_VERSION, 103130365Smlaier .name = NG_LMI_NODE_TYPE, 104130365Smlaier .constructor = nglmi_constructor, 105130365Smlaier .rcvmsg = nglmi_rcvmsg, 106130365Smlaier .shutdown = nglmi_shutdown, 107130365Smlaier .newhook = nglmi_newhook, 108130365Smlaier .rcvdata = nglmi_rcvdata, 109130365Smlaier .disconnect = nglmi_disconnect, 110130365Smlaier}; 111130365SmlaierNETGRAPH_INIT(lmi, &typestruct); 112130365Smlaier 113130365Smlaier/* 114130365Smlaier * Info and status per node 115130365Smlaier */ 116130365Smlaierstruct nglmi_softc { 117130365Smlaier node_p node; /* netgraph node */ 118130365Smlaier int flags; /* state */ 119130365Smlaier int poll_count; /* the count of times for autolmi */ 120130365Smlaier int poll_state; /* state of auto detect machine */ 121130365Smlaier u_char remote_seq; /* sequence number the remote sent */ 122130365Smlaier u_char local_seq; /* last sequence number we sent */ 123130365Smlaier u_char protoID; /* 9 for group of 4, 8 otherwise */ 124130365Smlaier u_long seq_retries; /* sent this how many time so far */ 125130365Smlaier struct callout handle; /* see timeout(9) */ 126130365Smlaier int liv_per_full; 127130365Smlaier int liv_rate; 128130365Smlaier int livs; 129130365Smlaier int need_full; 130130365Smlaier hook_p lmi_channel; /* whatever we ended up using */ 131130365Smlaier hook_p lmi_annexA; 132130365Smlaier hook_p lmi_annexD; 133130365Smlaier hook_p lmi_group4; 134130365Smlaier hook_p lmi_channel0; /* auto-detect on DLCI 0 */ 135130365Smlaier hook_p lmi_channel1023;/* auto-detect on DLCI 1023 */ 136130365Smlaier char *protoname; /* cache protocol name */ 137130365Smlaier u_char dlci_state[MAXDLCI + 1]; 138130365Smlaier int invalidx; /* next dlci's to invalidate */ 139130365Smlaier}; 140130365Smlaiertypedef struct nglmi_softc *sc_p; 141130365Smlaier 142130365Smlaier/* 143130365Smlaier * Other internal functions 144130365Smlaier */ 145130365Smlaierstatic void LMI_ticker(node_p node, hook_p hook, void *arg1, int arg2); 146130365Smlaierstatic void nglmi_startup_fixed(sc_p sc, hook_p hook); 147130365Smlaierstatic void nglmi_startup_auto(sc_p sc); 148130365Smlaierstatic void nglmi_startup(sc_p sc); 149130365Smlaierstatic void nglmi_inquire(sc_p sc, int full); 150130365Smlaierstatic void ngauto_state_machine(sc_p sc); 151130365Smlaier 152130365Smlaier/* 153130365Smlaier * Values for 'flags' field 154130365Smlaier * NB: the SCF_CONNECTED flag is set if and only if the timer is running. 155130365Smlaier */ 156130365Smlaier#define SCF_CONNECTED 0x01 /* connected to something */ 157130365Smlaier#define SCF_AUTO 0x02 /* we are auto-detecting */ 158130365Smlaier#define SCF_FIXED 0x04 /* we are fixed from the start */ 159130365Smlaier 160130365Smlaier#define SCF_LMITYPE 0x18 /* mask for determining Annex mode */ 161130365Smlaier#define SCF_NOLMI 0x00 /* no LMI type selected yet */ 162130365Smlaier#define SCF_ANNEX_A 0x08 /* running annex A mode */ 163130365Smlaier#define SCF_ANNEX_D 0x10 /* running annex D mode */ 164130365Smlaier#define SCF_GROUP4 0x18 /* running group of 4 */ 165130365Smlaier 166130365Smlaier#define SETLMITYPE(sc, annex) \ 167130365Smlaierdo { \ 168130365Smlaier (sc)->flags &= ~SCF_LMITYPE; \ 169130365Smlaier (sc)->flags |= (annex); \ 170130365Smlaier} while (0) 171130365Smlaier 172130365Smlaier#define NOPROTO(sc) (((sc)->flags & SCF_LMITYPE) == SCF_NOLMI) 173130365Smlaier#define ANNEXA(sc) (((sc)->flags & SCF_LMITYPE) == SCF_ANNEX_A) 174130365Smlaier#define ANNEXD(sc) (((sc)->flags & SCF_LMITYPE) == SCF_ANNEX_D) 175130365Smlaier#define GROUP4(sc) (((sc)->flags & SCF_LMITYPE) == SCF_GROUP4) 176130365Smlaier 177130365Smlaier#define LMIPOLLSIZE 3 178130365Smlaier#define LMI_PATIENCE 8 /* declare all DLCI DOWN after N LMI failures */ 179130365Smlaier 180130365Smlaier/* 181130365Smlaier * Node constructor 182130365Smlaier */ 183130365Smlaierstatic int 184130365Smlaiernglmi_constructor(node_p node) 185130365Smlaier{ 186130365Smlaier sc_p sc; 187130365Smlaier 188130365Smlaier sc = malloc(sizeof(*sc), M_NETGRAPH, M_WAITOK | M_ZERO); 189130365Smlaier 190130365Smlaier NG_NODE_SET_PRIVATE(node, sc); 191130365Smlaier sc->node = node; 192130365Smlaier 193130365Smlaier ng_callout_init(&sc->handle); 194130365Smlaier sc->protoname = NAME_NONE; 195130365Smlaier sc->liv_per_full = NG_LMI_SEQ_PER_FULL; /* make this dynamic */ 196130365Smlaier sc->liv_rate = NG_LMI_KEEPALIVE_RATE; 197130365Smlaier return (0); 198130365Smlaier} 199130365Smlaier 200130365Smlaier/* 201130365Smlaier * The LMI channel has a private pointer which is the same as the 202130365Smlaier * node private pointer. The debug channel has a NULL private pointer. 203130365Smlaier */ 204130365Smlaierstatic int 205130365Smlaiernglmi_newhook(node_p node, hook_p hook, const char *name) 206130365Smlaier{ 207240824Sglebius sc_p sc = NG_NODE_PRIVATE(node); 208130365Smlaier 209130365Smlaier if (strcmp(name, NG_LMI_HOOK_DEBUG) == 0) { 210130365Smlaier NG_HOOK_SET_PRIVATE(hook, NULL); 211130365Smlaier return (0); 212130365Smlaier } 213130365Smlaier if (sc->flags & SCF_CONNECTED) { 214130365Smlaier /* already connected, return an error */ 215130365Smlaier return (EINVAL); 216130365Smlaier } 217130365Smlaier if (strcmp(name, NG_LMI_HOOK_ANNEXA) == 0) { 218130365Smlaier sc->lmi_annexA = hook; 219130365Smlaier NG_HOOK_SET_PRIVATE(hook, NG_NODE_PRIVATE(node)); 220130365Smlaier sc->protoID = 8; 221130365Smlaier SETLMITYPE(sc, SCF_ANNEX_A); 222130365Smlaier sc->protoname = NAME_ANNEXA; 223130365Smlaier nglmi_startup_fixed(sc, hook); 224130365Smlaier } else if (strcmp(name, NG_LMI_HOOK_ANNEXD) == 0) { 225130365Smlaier sc->lmi_annexD = hook; 226130365Smlaier NG_HOOK_SET_PRIVATE(hook, NG_NODE_PRIVATE(node)); 227130365Smlaier sc->protoID = 8; 228130365Smlaier SETLMITYPE(sc, SCF_ANNEX_D); 229130365Smlaier sc->protoname = NAME_ANNEXD; 230130365Smlaier nglmi_startup_fixed(sc, hook); 231130365Smlaier } else if (strcmp(name, NG_LMI_HOOK_GROUPOF4) == 0) { 232130365Smlaier sc->lmi_group4 = hook; 233130365Smlaier NG_HOOK_SET_PRIVATE(hook, NG_NODE_PRIVATE(node)); 234130365Smlaier sc->protoID = 9; 235130365Smlaier SETLMITYPE(sc, SCF_GROUP4); 236130365Smlaier sc->protoname = NAME_GROUP4; 237130365Smlaier nglmi_startup_fixed(sc, hook); 238130365Smlaier } else if (strcmp(name, NG_LMI_HOOK_AUTO0) == 0) { 239130365Smlaier /* Note this, and if B is already installed, we're complete */ 240130365Smlaier sc->lmi_channel0 = hook; 241130365Smlaier sc->protoname = NAME_NONE; 242130365Smlaier NG_HOOK_SET_PRIVATE(hook, NG_NODE_PRIVATE(node)); 243130365Smlaier if (sc->lmi_channel1023) 244130365Smlaier nglmi_startup_auto(sc); 245130365Smlaier } else if (strcmp(name, NG_LMI_HOOK_AUTO1023) == 0) { 246130365Smlaier /* Note this, and if A is already installed, we're complete */ 247130365Smlaier sc->lmi_channel1023 = hook; 248130365Smlaier sc->protoname = NAME_NONE; 249130365Smlaier NG_HOOK_SET_PRIVATE(hook, NG_NODE_PRIVATE(node)); 250130365Smlaier if (sc->lmi_channel0) 251130365Smlaier nglmi_startup_auto(sc); 252130365Smlaier } else 253130365Smlaier return (EINVAL); /* unknown hook */ 254130365Smlaier return (0); 255130365Smlaier} 256130365Smlaier 257130365Smlaier/* 258130365Smlaier * We have just attached to a live (we hope) node. 259130365Smlaier * Fire out a LMI inquiry, and then start up the timers. 260130365Smlaier */ 261130365Smlaierstatic void 262130365SmlaierLMI_ticker(node_p node, hook_p hook, void *arg1, int arg2) 263130365Smlaier{ 264130365Smlaier sc_p sc = NG_NODE_PRIVATE(node); 265130365Smlaier 266130365Smlaier if (sc->flags & SCF_AUTO) { 267130365Smlaier ngauto_state_machine(sc); 268130365Smlaier ng_callout(&sc->handle, node, NULL, NG_LMI_POLL_RATE * hz, 269130365Smlaier LMI_ticker, NULL, 0); 270130365Smlaier } else { 271130365Smlaier if (sc->livs++ >= sc->liv_per_full) { 272130365Smlaier nglmi_inquire(sc, 1); 273130365Smlaier /* sc->livs = 0; *//* do this when we get the answer! */ 274130365Smlaier } else { 275130365Smlaier nglmi_inquire(sc, 0); 276130365Smlaier } 277130365Smlaier ng_callout(&sc->handle, node, NULL, sc->liv_rate * hz, 278130365Smlaier LMI_ticker, NULL, 0); 279130365Smlaier } 280130365Smlaier} 281130365Smlaier 282130365Smlaierstatic void 283130365Smlaiernglmi_startup_fixed(sc_p sc, hook_p hook) 284130365Smlaier{ 285130365Smlaier sc->flags |= (SCF_FIXED | SCF_CONNECTED); 286130365Smlaier sc->lmi_channel = hook; 287130365Smlaier nglmi_startup(sc); 288130365Smlaier} 289130365Smlaier 290130365Smlaierstatic void 291130365Smlaiernglmi_startup_auto(sc_p sc) 292130365Smlaier{ 293184205Sdes sc->flags |= (SCF_AUTO | SCF_CONNECTED); 294130365Smlaier sc->poll_state = 0; /* reset state machine */ 295130365Smlaier sc->poll_count = 0; 296130365Smlaier nglmi_startup(sc); 297130365Smlaier} 298130365Smlaier 299130365Smlaierstatic void 300130365Smlaiernglmi_startup(sc_p sc) 301130365Smlaier{ 302130365Smlaier sc->remote_seq = 0; 303130365Smlaier sc->local_seq = 1; 304130365Smlaier sc->seq_retries = 0; 305130365Smlaier sc->livs = sc->liv_per_full - 1; 306130365Smlaier /* start off the ticker in 1 sec */ 307130365Smlaier ng_callout(&sc->handle, sc->node, NULL, hz, LMI_ticker, NULL, 0); 308130365Smlaier} 309130365Smlaier 310130365Smlaierstatic void 311130365Smlaiernglmi_inquire(sc_p sc, int full) 312130365Smlaier{ 313130365Smlaier struct mbuf *m; 314130365Smlaier struct ng_tag_prio *ptag; 315130365Smlaier char *cptr, *start; 316130365Smlaier int error; 317130365Smlaier 318130365Smlaier if (sc->lmi_channel == NULL) 319130365Smlaier return; 320130365Smlaier MGETHDR(m, M_NOWAIT, MT_DATA); 321130365Smlaier if (m == NULL) { 322130365Smlaier log(LOG_ERR, "nglmi: unable to start up LMI processing\n"); 323130365Smlaier return; 324130365Smlaier } 325130365Smlaier m->m_pkthdr.rcvif = NULL; 326130365Smlaier 327130365Smlaier /* Attach a tag to packet, marking it of link level state priority, so 328130365Smlaier * that device driver would put it in the beginning of queue */ 329130365Smlaier 330130365Smlaier ptag = (struct ng_tag_prio *)m_tag_alloc(NGM_GENERIC_COOKIE, NG_TAG_PRIO, 331147256Sbrooks (sizeof(struct ng_tag_prio) - sizeof(struct m_tag)), M_NOWAIT); 332130365Smlaier if (ptag != NULL) { /* if it failed, well, it was optional anyhow */ 333130365Smlaier ptag->priority = NG_PRIO_LINKSTATE; 334130365Smlaier ptag->discardability = -1; 335130365Smlaier m_tag_prepend(m, &ptag->tag); 336130365Smlaier } 337130365Smlaier 338130365Smlaier m->m_data += 4; /* leave some room for a header */ 339130365Smlaier cptr = start = mtod(m, char *); 340130365Smlaier /* add in the header for an LMI inquiry. */ 341130365Smlaier *cptr++ = 0x03; /* UI frame */ 342130365Smlaier if (GROUP4(sc)) 343130365Smlaier *cptr++ = 0x09; /* proto discriminator */ 344130365Smlaier else 345130365Smlaier *cptr++ = 0x08; /* proto discriminator */ 346130365Smlaier *cptr++ = 0x00; /* call reference */ 347130365Smlaier *cptr++ = 0x75; /* inquiry */ 348130365Smlaier 349130365Smlaier /* If we are Annex-D, add locking shift to codeset 5. */ 350130365Smlaier if (ANNEXD(sc)) 351130365Smlaier *cptr++ = 0x95; /* locking shift */ 352130365Smlaier /* Add a request type */ 353130365Smlaier if (ANNEXA(sc)) 354130365Smlaier *cptr++ = 0x51; /* report type */ 355130365Smlaier else 356130365Smlaier *cptr++ = 0x01; /* report type */ 357130365Smlaier *cptr++ = 0x01; /* size = 1 */ 358130365Smlaier if (full) 359130365Smlaier *cptr++ = 0x00; /* full */ 360130365Smlaier else 361130365Smlaier *cptr++ = 0x01; /* partial */ 362130365Smlaier 363130365Smlaier /* Add a link verification IE */ 364130365Smlaier if (ANNEXA(sc)) 365130365Smlaier *cptr++ = 0x53; /* verification IE */ 366130365Smlaier else 367130365Smlaier *cptr++ = 0x03; /* verification IE */ 368130365Smlaier *cptr++ = 0x02; /* 2 extra bytes */ 369130365Smlaier *cptr++ = sc->local_seq; 370130365Smlaier *cptr++ = sc->remote_seq; 371130365Smlaier sc->seq_retries++; 372130365Smlaier 373130365Smlaier /* Send it */ 374130365Smlaier m->m_len = m->m_pkthdr.len = cptr - start; 375130365Smlaier NG_SEND_DATA_ONLY(error, sc->lmi_channel, m); 376130365Smlaier 377130365Smlaier /* If we've been sending requests for long enough, and there has 378130365Smlaier * been no response, then mark as DOWN, any DLCIs that are UP. */ 379130365Smlaier if (sc->seq_retries == LMI_PATIENCE) { 380130365Smlaier int count; 381130365Smlaier 382130365Smlaier for (count = 0; count < MAXDLCI; count++) 383130365Smlaier if (sc->dlci_state[count] == DLCI_UP) 384130365Smlaier sc->dlci_state[count] = DLCI_DOWN; 385130365Smlaier } 386130365Smlaier} 387130365Smlaier 388130365Smlaier/* 389130365Smlaier * State machine for LMI auto-detect. The transitions are ordered 390130365Smlaier * to try the more likely possibilities first. 391130365Smlaier */ 392130365Smlaierstatic void 393130365Smlaierngauto_state_machine(sc_p sc) 394130365Smlaier{ 395130365Smlaier if ((sc->poll_count <= 0) || (sc->poll_count > LMIPOLLSIZE)) { 396130365Smlaier /* time to change states in the auto probe machine */ 397130365Smlaier /* capture wild values of poll_count while we are at it */ 398130365Smlaier sc->poll_count = LMIPOLLSIZE; 399130365Smlaier sc->poll_state++; 400130365Smlaier } 401130365Smlaier switch (sc->poll_state) { 402130365Smlaier case 7: 403130365Smlaier log(LOG_WARNING, "nglmi: no response from exchange\n"); 404130365Smlaier default: /* capture bad states */ 405130365Smlaier sc->poll_state = 1; 406130365Smlaier case 1: 407130365Smlaier sc->lmi_channel = sc->lmi_channel0; 408130365Smlaier SETLMITYPE(sc, SCF_ANNEX_D); 409130365Smlaier break; 410130365Smlaier case 2: 411130365Smlaier sc->lmi_channel = sc->lmi_channel1023; 412130365Smlaier SETLMITYPE(sc, SCF_ANNEX_D); 413130365Smlaier break; 414130365Smlaier case 3: 415130365Smlaier sc->lmi_channel = sc->lmi_channel0; 416130365Smlaier SETLMITYPE(sc, SCF_ANNEX_A); 417130365Smlaier break; 418130365Smlaier case 4: 419130365Smlaier sc->lmi_channel = sc->lmi_channel1023; 420130365Smlaier SETLMITYPE(sc, SCF_GROUP4); 421130365Smlaier break; 422130365Smlaier case 5: 423130365Smlaier sc->lmi_channel = sc->lmi_channel1023; 424130365Smlaier SETLMITYPE(sc, SCF_ANNEX_A); 425130365Smlaier break; 426130365Smlaier case 6: 427130365Smlaier sc->lmi_channel = sc->lmi_channel0; 428130365Smlaier SETLMITYPE(sc, SCF_GROUP4); 429130365Smlaier break; 430130365Smlaier } 431130365Smlaier 432130365Smlaier /* send an inquirey encoded appropriatly */ 433130365Smlaier nglmi_inquire(sc, 0); 434130365Smlaier sc->poll_count--; 435130365Smlaier} 436130365Smlaier 437130365Smlaier/* 438130365Smlaier * Receive a netgraph control message. 439130365Smlaier */ 440130365Smlaierstatic int 441130365Smlaiernglmi_rcvmsg(node_p node, item_p item, hook_p lasthook) 442130365Smlaier{ 443130365Smlaier sc_p sc = NG_NODE_PRIVATE(node); 444130365Smlaier struct ng_mesg *resp = NULL; 445130365Smlaier int error = 0; 446130365Smlaier struct ng_mesg *msg; 447130365Smlaier 448130365Smlaier NGI_GET_MSG(item, msg); 449130365Smlaier switch (msg->header.typecookie) { 450130365Smlaier case NGM_GENERIC_COOKIE: 451130365Smlaier switch (msg->header.cmd) { 452130365Smlaier case NGM_TEXT_STATUS: 453130365Smlaier { 454130365Smlaier char *arg; 455130365Smlaier int pos, count; 456130365Smlaier 457130365Smlaier NG_MKRESPONSE(resp, msg, NG_TEXTRESPONSE, M_NOWAIT); 458130365Smlaier if (resp == NULL) { 459130365Smlaier error = ENOMEM; 460130365Smlaier break; 461130365Smlaier } 462130365Smlaier arg = resp->data; 463130365Smlaier pos = sprintf(arg, "protocol %s ", sc->protoname); 464130365Smlaier if (sc->flags & SCF_FIXED) 465130365Smlaier pos += sprintf(arg + pos, "fixed\n"); 466130365Smlaier else if (sc->flags & SCF_AUTO) 467130365Smlaier pos += sprintf(arg + pos, "auto-detecting\n"); 468130365Smlaier else 469130365Smlaier pos += sprintf(arg + pos, "auto on dlci %d\n", 470130365Smlaier (sc->lmi_channel == sc->lmi_channel0) ? 471130365Smlaier 0 : 1023); 472130365Smlaier pos += sprintf(arg + pos, 473130365Smlaier "keepalive period: %d seconds\n", sc->liv_rate); 474130365Smlaier pos += sprintf(arg + pos, 475130365Smlaier "unacknowledged keepalives: %ld\n", 476130365Smlaier sc->seq_retries); 477130365Smlaier for (count = 0; 478130365Smlaier ((count <= MAXDLCI) 479130365Smlaier && (pos < (NG_TEXTRESPONSE - 20))); 480130365Smlaier count++) { 481130365Smlaier if (sc->dlci_state[count]) { 482130365Smlaier pos += sprintf(arg + pos, 483130365Smlaier "dlci %d %s\n", count, 484130365Smlaier (sc->dlci_state[count] 485130365Smlaier == DLCI_UP) ? "up" : "down"); 486130365Smlaier } 487130365Smlaier } 488130365Smlaier resp->header.arglen = pos + 1; 489130365Smlaier break; 490130365Smlaier } 491130365Smlaier default: 492130365Smlaier error = EINVAL; 493130365Smlaier break; 494130365Smlaier } 495130365Smlaier break; 496130365Smlaier case NGM_LMI_COOKIE: 497130365Smlaier switch (msg->header.cmd) { 498130365Smlaier case NGM_LMI_GET_STATUS: 499130365Smlaier { 500130365Smlaier struct nglmistat *stat; 501130365Smlaier int k; 502130365Smlaier 503130365Smlaier NG_MKRESPONSE(resp, msg, sizeof(*stat), M_NOWAIT); 504130365Smlaier if (!resp) { 505130365Smlaier error = ENOMEM; 506130365Smlaier break; 507130365Smlaier } 508130365Smlaier stat = (struct nglmistat *) resp->data; 509130365Smlaier strncpy(stat->proto, 510130365Smlaier sc->protoname, sizeof(stat->proto) - 1); 511130365Smlaier strncpy(stat->hook, 512130365Smlaier sc->protoname, sizeof(stat->hook) - 1); 513130365Smlaier stat->autod = !!(sc->flags & SCF_AUTO); 514130365Smlaier stat->fixed = !!(sc->flags & SCF_FIXED); 515130365Smlaier for (k = 0; k <= MAXDLCI; k++) { 516130365Smlaier switch (sc->dlci_state[k]) { 517130365Smlaier case DLCI_UP: 518130365Smlaier stat->up[k / 8] |= (1 << (k % 8)); 519130365Smlaier /* fall through */ 520130365Smlaier case DLCI_DOWN: 521130365Smlaier stat->seen[k / 8] |= (1 << (k % 8)); 522130365Smlaier break; 523130365Smlaier } 524130365Smlaier } 525130365Smlaier break; 526130365Smlaier } 527130365Smlaier default: 528130365Smlaier error = EINVAL; 529130365Smlaier break; 530130365Smlaier } 531164033Srwatson break; 532164033Srwatson default: 533164033Srwatson error = EINVAL; 534164033Srwatson break; 535130365Smlaier } 536130365Smlaier 537130365Smlaier NG_RESPOND_MSG(error, node, item, resp); 538130365Smlaier NG_FREE_MSG(msg); 539130365Smlaier return (error); 540130365Smlaier} 541130365Smlaier 542130365Smlaier#define STEPBY(stepsize) \ 543130365Smlaier do { \ 544130365Smlaier packetlen -= (stepsize); \ 545130365Smlaier data += (stepsize); \ 546130365Smlaier } while (0) 547130365Smlaier 548130365Smlaier/* 549130365Smlaier * receive data, and use it to update our status. 550130365Smlaier * Anything coming in on the debug port is discarded. 551130365Smlaier */ 552130365Smlaierstatic int 553130365Smlaiernglmi_rcvdata(hook_p hook, item_p item) 554130365Smlaier{ 555130365Smlaier sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 556130365Smlaier const u_char *data; 557130365Smlaier unsigned short dlci; 558130365Smlaier u_short packetlen; 559130365Smlaier int resptype_seen = 0; 560130365Smlaier struct mbuf *m; 561130365Smlaier 562130365Smlaier NGI_GET_M(item, m); 563130365Smlaier NG_FREE_ITEM(item); 564130365Smlaier if (NG_HOOK_PRIVATE(hook) == NULL) { 565130365Smlaier goto drop; 566130365Smlaier } 567130365Smlaier packetlen = m->m_len; 568130365Smlaier 569130365Smlaier /* XXX what if it's more than 1 mbuf? */ 570130365Smlaier if ((packetlen > MHLEN) && !(m->m_flags & M_EXT)) { 571130365Smlaier log(LOG_WARNING, "nglmi: packetlen (%d) too big\n", packetlen); 572184205Sdes goto drop; 573130365Smlaier } 574130365Smlaier if (m->m_len < packetlen && (m = m_pullup(m, packetlen)) == NULL) { 575130365Smlaier log(LOG_WARNING, 576130365Smlaier "nglmi: m_pullup failed for %d bytes\n", packetlen); 577130365Smlaier return (0); 578130365Smlaier } 579184205Sdes if (nglmi_checkdata(hook, m) == 0) 580130365Smlaier return (0); 581130365Smlaier 582184205Sdes /* pass the first 4 bytes (already checked in the nglmi_checkdata()) */ 583130365Smlaier data = mtod(m, const u_char *); 584130365Smlaier STEPBY(4); 585130365Smlaier 586130365Smlaier /* Now check if there is a 'locking shift'. This is only seen in 587130365Smlaier * Annex D frames. don't bother checking, we already did that. Don't 588130365Smlaier * increment immediatly as it might not be there. */ 589130365Smlaier if (ANNEXD(sc)) 590184205Sdes STEPBY(1); 591184205Sdes 592130365Smlaier /* If we get this far we should consider that it is a legitimate 593130365Smlaier * frame and we know what it is. */ 594130365Smlaier if (sc->flags & SCF_AUTO) { 595130365Smlaier /* note the hook that this valid channel came from and drop 596130365Smlaier * out of auto probe mode. */ 597130365Smlaier if (ANNEXA(sc)) 598130365Smlaier sc->protoname = NAME_ANNEXA; 599130365Smlaier else if (ANNEXD(sc)) 600130365Smlaier sc->protoname = NAME_ANNEXD; 601130365Smlaier else if (GROUP4(sc)) 602130365Smlaier sc->protoname = NAME_GROUP4; 603130365Smlaier else { 604130365Smlaier log(LOG_ERR, "nglmi: No known type\n"); 605130365Smlaier goto drop; 606130365Smlaier } 607130365Smlaier sc->lmi_channel = hook; 608130365Smlaier sc->flags &= ~SCF_AUTO; 609130365Smlaier log(LOG_INFO, "nglmi: auto-detected %s LMI on DLCI %d\n", 610184205Sdes sc->protoname, hook == sc->lmi_channel0 ? 0 : 1023); 611184205Sdes } 612130365Smlaier 613130365Smlaier /* While there is more data in the status packet, keep processing 614130365Smlaier * status items. First make sure there is enough data for the 615130365Smlaier * segment descriptor's length field. */ 616130365Smlaier while (packetlen >= 2) { 617130365Smlaier u_int segtype = data[0]; 618130365Smlaier u_int segsize = data[1]; 619130365Smlaier 620130365Smlaier /* Now that we know how long it claims to be, make sure 621130365Smlaier * there is enough data for the next seg. */ 622130365Smlaier if (packetlen < segsize + 2) 623130365Smlaier break; 624130365Smlaier switch (segtype) { 625130365Smlaier case 0x01: 626130365Smlaier case 0x51: 627130365Smlaier if (resptype_seen) { 628130365Smlaier log(LOG_WARNING, "nglmi: dup MSGTYPE\n"); 629130365Smlaier goto nextIE; 630130365Smlaier } 631130365Smlaier resptype_seen++; 632130365Smlaier /* The remote end tells us what kind of response 633130365Smlaier * this is. Only expect a type 0 or 1. if we are a 634130365Smlaier * full status, invalidate a few DLCIs just to see 635130365Smlaier * that they are still ok. */ 636130365Smlaier if (segsize != 1) 637130365Smlaier goto nextIE; 638130365Smlaier switch (data[2]) { 639130365Smlaier case 1: 640130365Smlaier /* partial status, do no extra processing */ 641130365Smlaier break; 642130365Smlaier case 0: 643130365Smlaier { 644130365Smlaier int count = 0; 645130365Smlaier int idx = sc->invalidx; 646130365Smlaier 647130365Smlaier for (count = 0; count < 10; count++) { 648130365Smlaier if (idx > MAXDLCI) 649130365Smlaier idx = 0; 650130365Smlaier if (sc->dlci_state[idx] == DLCI_UP) 651130365Smlaier sc->dlci_state[idx] = DLCI_DOWN; 652130365Smlaier idx++; 653130365Smlaier } 654130365Smlaier sc->invalidx = idx; 655130365Smlaier /* we got and we wanted one. relax 656130365Smlaier * now.. but don't reset to 0 if it 657130365Smlaier * was unrequested. */ 658130365Smlaier if (sc->livs > sc->liv_per_full) 659130365Smlaier sc->livs = 0; 660130365Smlaier break; 661130365Smlaier } 662130365Smlaier } 663130365Smlaier break; 664130365Smlaier case 0x03: 665130365Smlaier case 0x53: 666130365Smlaier /* The remote tells us what it thinks the sequence 667130365Smlaier * numbers are. If it's not size 2, it must be a 668130365Smlaier * duplicate to have gotten this far, skip it. */ 669130365Smlaier if (segsize != 2) 670130365Smlaier goto nextIE; 671130365Smlaier sc->remote_seq = data[2]; 672130365Smlaier if (sc->local_seq == data[3]) { 673130365Smlaier sc->local_seq++; 674130365Smlaier sc->seq_retries = 0; 675130365Smlaier /* Note that all 3 Frame protocols seem to 676130365Smlaier * not like 0 as a sequence number. */ 677130365Smlaier if (sc->local_seq == 0) 678130365Smlaier sc->local_seq = 1; 679130365Smlaier } 680130365Smlaier break; 681130365Smlaier case 0x07: 682130365Smlaier case 0x57: 683130365Smlaier /* The remote tells us about a DLCI that it knows 684130365Smlaier * about. There may be many of these in a single 685130365Smlaier * status response */ 686130365Smlaier switch (segsize) { 687130365Smlaier case 6:/* only on 'group of 4' */ 688130365Smlaier dlci = ((u_short) data[2] & 0xff) << 8; 689130365Smlaier dlci |= (data[3] & 0xff); 690130365Smlaier if ((dlci < 1024) && (dlci > 0)) { 691130365Smlaier /* XXX */ 692130365Smlaier } 693130365Smlaier break; 694130365Smlaier case 3: 695130365Smlaier dlci = ((u_short) data[2] & 0x3f) << 4; 696130365Smlaier dlci |= ((data[3] & 0x78) >> 3); 697130365Smlaier if ((dlci < 1024) && (dlci > 0)) { 698130365Smlaier /* set up the bottom half of the 699130365Smlaier * support for that dlci if it's not 700130365Smlaier * already been done */ 701130365Smlaier /* store this information somewhere */ 702130365Smlaier } 703130365Smlaier break; 704130365Smlaier default: 705130365Smlaier goto nextIE; 706130365Smlaier } 707130365Smlaier if (sc->dlci_state[dlci] != DLCI_UP) { 708130365Smlaier /* bring new DLCI to life */ 709130365Smlaier /* may do more here some day */ 710130365Smlaier if (sc->dlci_state[dlci] != DLCI_DOWN) 711130365Smlaier log(LOG_INFO, 712130365Smlaier "nglmi: DLCI %d became active\n", 713130365Smlaier dlci); 714130365Smlaier sc->dlci_state[dlci] = DLCI_UP; 715130365Smlaier } 716130365Smlaier break; 717130365Smlaier } 718130365SmlaiernextIE: 719130365Smlaier STEPBY(segsize + 2); 720130365Smlaier } 721130365Smlaier NG_FREE_M(m); 722130365Smlaier return (0); 723130365Smlaier 724130365Smlaierdrop: 725130365Smlaier NG_FREE_M(m); 726130365Smlaier return (EINVAL); 727130365Smlaier} 728130365Smlaier 729130365Smlaier/* 730130365Smlaier * Check that a packet is entirely kosha. 731130365Smlaier * return 1 of ok, and 0 if not. 732130365Smlaier * All data is discarded if a 0 is returned. 733130365Smlaier */ 734130365Smlaierstatic int 735130365Smlaiernglmi_checkdata(hook_p hook, struct mbuf *m) 736130365Smlaier{ 737130365Smlaier sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 738130365Smlaier const u_char *data; 739130365Smlaier u_short packetlen; 740130365Smlaier unsigned short dlci; 741130365Smlaier u_char type; 742130365Smlaier u_char nextbyte; 743130365Smlaier int seq_seen = 0; 744130365Smlaier int resptype_seen = 0; /* 0 , 1 (partial) or 2 (full) */ 745130365Smlaier int highest_dlci = 0; 746130365Smlaier 747130365Smlaier packetlen = m->m_len; 748130365Smlaier data = mtod(m, const u_char *); 749130365Smlaier if (*data != 0x03) { 750130365Smlaier log(LOG_WARNING, "nglmi: unexpected value in LMI(%d)\n", 1); 751130365Smlaier goto reject; 752130365Smlaier } 753130365Smlaier STEPBY(1); 754130365Smlaier 755130365Smlaier /* look at the protocol ID */ 756130365Smlaier nextbyte = *data; 757130365Smlaier if (sc->flags & SCF_AUTO) { 758130365Smlaier SETLMITYPE(sc, SCF_NOLMI); /* start with a clean slate */ 759184205Sdes switch (nextbyte) { 760184205Sdes case 0x8: 761130365Smlaier sc->protoID = 8; 762130365Smlaier break; 763130365Smlaier case 0x9: 764130365Smlaier SETLMITYPE(sc, SCF_GROUP4); 765130365Smlaier sc->protoID = 9; 766130365Smlaier break; 767130365Smlaier default: 768130365Smlaier log(LOG_WARNING, "nglmi: bad Protocol ID(%d)\n", 769130365Smlaier (int) nextbyte); 770130365Smlaier goto reject; 771130365Smlaier } 772130365Smlaier } else { 773130365Smlaier if (nextbyte != sc->protoID) { 774130365Smlaier log(LOG_WARNING, "nglmi: unexpected Protocol ID(%d)\n", 775130368Smlaier (int) nextbyte); 776130368Smlaier goto reject; 777130365Smlaier } 778130365Smlaier } 779130365Smlaier STEPBY(1); 780130365Smlaier 781130365Smlaier /* check call reference (always null in non ISDN frame relay) */ 782130365Smlaier if (*data != 0x00) { 783130365Smlaier log(LOG_WARNING, "nglmi: unexpected Call Reference (0x%x)\n", 784130365Smlaier data[-1]); 785130365Smlaier goto reject; 786130365Smlaier } 787130365Smlaier STEPBY(1); 788130365Smlaier 789130365Smlaier /* check message type */ 790130365Smlaier switch ((type = *data)) { 791130365Smlaier case 0x75: /* Status enquiry */ 792130365Smlaier log(LOG_WARNING, "nglmi: unexpected message type(0x%x)\n", 793130365Smlaier data[-1]); 794130365Smlaier goto reject; 795130365Smlaier case 0x7D: /* Status message */ 796130365Smlaier break; 797130365Smlaier default: 798130365Smlaier log(LOG_WARNING, 799130365Smlaier "nglmi: unexpected msg type(0x%x) \n", (int) type); 800130365Smlaier goto reject; 801130365Smlaier } 802130368Smlaier STEPBY(1); 803130368Smlaier 804130365Smlaier /* Now check if there is a 'locking shift'. This is only seen in 805130365Smlaier * Annex D frames. Don't increment immediately as it might not be 806130365Smlaier * there. */ 807130365Smlaier nextbyte = *data; 808130365Smlaier if (sc->flags & SCF_AUTO) { 809130365Smlaier if (!(GROUP4(sc))) { 810130365Smlaier if (nextbyte == 0x95) { 811130365Smlaier SETLMITYPE(sc, SCF_ANNEX_D); 812130365Smlaier STEPBY(1); 813130365Smlaier } else 814130365Smlaier SETLMITYPE(sc, SCF_ANNEX_A); 815130365Smlaier } else if (nextbyte == 0x95) { 816130365Smlaier log(LOG_WARNING, "nglmi: locking shift seen in G4\n"); 817130365Smlaier goto reject; 818130365Smlaier } 819130365Smlaier } else { 820130365Smlaier if (ANNEXD(sc)) { 821130365Smlaier if (*data == 0x95) 822130365Smlaier STEPBY(1); 823130365Smlaier else { 824130365Smlaier log(LOG_WARNING, 825130365Smlaier "nglmi: locking shift missing\n"); 826130365Smlaier goto reject; 827130368Smlaier } 828130368Smlaier } else if (*data == 0x95) { 829130365Smlaier log(LOG_WARNING, "nglmi: locking shift seen\n"); 830130365Smlaier goto reject; 831130365Smlaier } 832130365Smlaier } 833130365Smlaier 834130365Smlaier /* While there is more data in the status packet, keep processing 835130365Smlaier * status items. First make sure there is enough data for the 836130365Smlaier * segment descriptor's length field. */ 837130365Smlaier while (packetlen >= 2) { 838130365Smlaier u_int segtype = data[0]; 839130365Smlaier u_int segsize = data[1]; 840130365Smlaier 841130365Smlaier /* Now that we know how long it claims to be, make sure 842130365Smlaier * there is enough data for the next seg. */ 843130365Smlaier if (packetlen < (segsize + 2)) { 844130365Smlaier log(LOG_WARNING, "nglmi: IE longer than packet\n"); 845130365Smlaier break; 846130365Smlaier } 847130365Smlaier switch (segtype) { 848130365Smlaier case 0x01: 849130365Smlaier case 0x51: 850130365Smlaier /* According to MCI's HP analyser, we should just 851 * ignore if there is mor ethan one of these (?). */ 852 if (resptype_seen) { 853 log(LOG_WARNING, "nglmi: dup MSGTYPE\n"); 854 goto nextIE; 855 } 856 if (segsize != 1) { 857 log(LOG_WARNING, "nglmi: MSGTYPE wrong size\n"); 858 goto reject; 859 } 860 /* The remote end tells us what kind of response 861 * this is. Only expect a type 0 or 1. if it was a 862 * full (type 0) check we just asked for a type 863 * full. */ 864 switch (data[2]) { 865 case 1:/* partial */ 866 if (sc->livs > sc->liv_per_full) { 867 log(LOG_WARNING, 868 "nglmi: LIV when FULL expected\n"); 869 goto reject; /* need full */ 870 } 871 resptype_seen = 1; 872 break; 873 case 0:/* full */ 874 /* Full response is always acceptable */ 875 resptype_seen = 2; 876 break; 877 default: 878 log(LOG_WARNING, 879 "nglmi: Unknown report type %d\n", data[2]); 880 goto reject; 881 } 882 break; 883 case 0x03: 884 case 0x53: 885 /* The remote tells us what it thinks the sequence 886 * numbers are. I would have thought that there 887 * needs to be one and only one of these, but MCI 888 * want us to just ignore extras. (?) */ 889 if (resptype_seen == 0) { 890 log(LOG_WARNING, "nglmi: no TYPE before SEQ\n"); 891 goto reject; 892 } 893 if (seq_seen != 0) /* already seen seq numbers */ 894 goto nextIE; 895 if (segsize != 2) { 896 log(LOG_WARNING, "nglmi: bad SEQ sts size\n"); 897 goto reject; 898 } 899 if (sc->local_seq != data[3]) { 900 log(LOG_WARNING, "nglmi: unexpected SEQ\n"); 901 goto reject; 902 } 903 seq_seen = 1; 904 break; 905 case 0x07: 906 case 0x57: 907 /* The remote tells us about a DLCI that it knows 908 * about. There may be many of these in a single 909 * status response */ 910 if (seq_seen != 1) { /* already seen seq numbers? */ 911 log(LOG_WARNING, 912 "nglmi: No sequence before DLCI\n"); 913 goto reject; 914 } 915 if (resptype_seen != 2) { /* must be full */ 916 log(LOG_WARNING, 917 "nglmi: No resp type before DLCI\n"); 918 goto reject; 919 } 920 if (GROUP4(sc)) { 921 if (segsize != 6) { 922 log(LOG_WARNING, 923 "nglmi: wrong IE segsize\n"); 924 goto reject; 925 } 926 dlci = ((u_short) data[2] & 0xff) << 8; 927 dlci |= (data[3] & 0xff); 928 } else { 929 if (segsize != 3) { 930 log(LOG_WARNING, 931 "nglmi: DLCI headersize of %d" 932 " not supported\n", segsize - 1); 933 goto reject; 934 } 935 dlci = ((u_short) data[2] & 0x3f) << 4; 936 dlci |= ((data[3] & 0x78) >> 3); 937 } 938 /* async can only have one of these */ 939#if 0 /* async not yet accepted */ 940 if (async && highest_dlci) { 941 log(LOG_WARNING, 942 "nglmi: Async with > 1 DLCI\n"); 943 goto reject; 944 } 945#endif 946 /* Annex D says these will always be Ascending, but 947 * the HP test for G4 says we should accept 948 * duplicates, so for now allow that. ( <= vs. < ) */ 949#if 0 950 /* MCI tests want us to accept out of order for AnxD */ 951 if ((!GROUP4(sc)) && (dlci < highest_dlci)) { 952 /* duplicate or mis-ordered dlci */ 953 /* (spec says they will increase in number) */ 954 log(LOG_WARNING, "nglmi: DLCI out of order\n"); 955 goto reject; 956 } 957#endif 958 if (dlci > 1023) { 959 log(LOG_WARNING, "nglmi: DLCI out of range\n"); 960 goto reject; 961 } 962 highest_dlci = dlci; 963 break; 964 default: 965 log(LOG_WARNING, 966 "nglmi: unknown LMI segment type %d\n", segtype); 967 } 968nextIE: 969 STEPBY(segsize + 2); 970 } 971 if (packetlen != 0) { /* partial junk at end? */ 972 log(LOG_WARNING, 973 "nglmi: %d bytes extra at end of packet\n", packetlen); 974 goto print; 975 } 976 if (resptype_seen == 0) { 977 log(LOG_WARNING, "nglmi: No response type seen\n"); 978 goto reject; /* had no response type */ 979 } 980 if (seq_seen == 0) { 981 log(LOG_WARNING, "nglmi: No sequence numbers seen\n"); 982 goto reject; /* had no sequence numbers */ 983 } 984 return (1); 985 986print: 987 { 988 int i, j, k, pos; 989 char buf[100]; 990 int loc; 991 const u_char *bp = mtod(m, const u_char *); 992 993 k = i = 0; 994 loc = (m->m_len - packetlen); 995 log(LOG_WARNING, "nglmi: error at location %d\n", loc); 996 while (k < m->m_len) { 997 pos = 0; 998 j = 0; 999 while ((j++ < 16) && k < m->m_len) { 1000 pos += sprintf(buf + pos, "%c%02x", 1001 ((loc == k) ? '>' : ' '), 1002 bp[k]); 1003 k++; 1004 } 1005 if (i == 0) 1006 log(LOG_WARNING, "nglmi: packet data:%s\n", buf); 1007 else 1008 log(LOG_WARNING, "%04d :%s\n", k, buf); 1009 i++; 1010 } 1011 } 1012 return (1); 1013reject: 1014 { 1015 int i, j, k, pos; 1016 char buf[100]; 1017 int loc; 1018 const u_char *bp = mtod(m, const u_char *); 1019 1020 k = i = 0; 1021 loc = (m->m_len - packetlen); 1022 log(LOG_WARNING, "nglmi: error at location %d\n", loc); 1023 while (k < m->m_len) { 1024 pos = 0; 1025 j = 0; 1026 while ((j++ < 16) && k < m->m_len) { 1027 pos += sprintf(buf + pos, "%c%02x", 1028 ((loc == k) ? '>' : ' '), 1029 bp[k]); 1030 k++; 1031 } 1032 if (i == 0) 1033 log(LOG_WARNING, "nglmi: packet data:%s\n", buf); 1034 else 1035 log(LOG_WARNING, "%04d :%s\n", k, buf); 1036 i++; 1037 } 1038 } 1039 NG_FREE_M(m); 1040 return (0); 1041} 1042 1043/* 1044 * Do local shutdown processing.. 1045 * Cut any remaining links and free our local resources. 1046 */ 1047static int 1048nglmi_shutdown(node_p node) 1049{ 1050 const sc_p sc = NG_NODE_PRIVATE(node); 1051 1052 NG_NODE_SET_PRIVATE(node, NULL); 1053 NG_NODE_UNREF(sc->node); 1054 free(sc, M_NETGRAPH); 1055 return (0); 1056} 1057 1058/* 1059 * Hook disconnection 1060 * For this type, removal of any link except "debug" destroys the node. 1061 */ 1062static int 1063nglmi_disconnect(hook_p hook) 1064{ 1065 const sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 1066 1067 /* OK to remove debug hook(s) */ 1068 if (NG_HOOK_PRIVATE(hook) == NULL) 1069 return (0); 1070 1071 /* Stop timer if it's currently active */ 1072 if (sc->flags & SCF_CONNECTED) 1073 ng_uncallout(&sc->handle, sc->node); 1074 1075 /* Self-destruct */ 1076 if (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))) 1077 ng_rmnode_self(NG_HOOK_NODE(hook)); 1078 return (0); 1079} 1080 1081