mp.c revision 38174
136285Sbrian/*- 236285Sbrian * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> 336285Sbrian * All rights reserved. 436285Sbrian * 536285Sbrian * Redistribution and use in source and binary forms, with or without 636285Sbrian * modification, are permitted provided that the following conditions 736285Sbrian * are met: 836285Sbrian * 1. Redistributions of source code must retain the above copyright 936285Sbrian * notice, this list of conditions and the following disclaimer. 1036285Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1136285Sbrian * notice, this list of conditions and the following disclaimer in the 1236285Sbrian * documentation and/or other materials provided with the distribution. 1336285Sbrian * 1436285Sbrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1536285Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1636285Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1736285Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1836285Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1936285Sbrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2036285Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2136285Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2236285Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2336285Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2436285Sbrian * SUCH DAMAGE. 2536285Sbrian * 2638174Sbrian * $Id: mp.c,v 1.12 1998/06/30 23:04:17 brian Exp $ 2736285Sbrian */ 2836285Sbrian 2936285Sbrian#include <sys/types.h> 3036285Sbrian#include <netinet/in.h> 3136285Sbrian#include <netinet/in_systm.h> 3236285Sbrian#include <netinet/ip.h> 3336285Sbrian#include <arpa/inet.h> 3436285Sbrian#include <net/if_dl.h> 3536285Sbrian#include <sys/socket.h> 3636285Sbrian#include <sys/un.h> 3736285Sbrian 3836285Sbrian#include <errno.h> 3936285Sbrian#include <paths.h> 4036285Sbrian#include <stdlib.h> 4136285Sbrian#include <stdio.h> 4236285Sbrian#include <string.h> 4336285Sbrian#include <sys/stat.h> 4436285Sbrian#include <termios.h> 4536285Sbrian#include <unistd.h> 4636285Sbrian 4737009Sbrian#include "defs.h" 4836285Sbrian#include "command.h" 4936285Sbrian#include "mbuf.h" 5036285Sbrian#include "log.h" 5136285Sbrian#include "timer.h" 5236285Sbrian#include "fsm.h" 5336285Sbrian#include "iplist.h" 5436285Sbrian#include "throughput.h" 5536285Sbrian#include "slcompress.h" 5636285Sbrian#include "ipcp.h" 5736285Sbrian#include "auth.h" 5836285Sbrian#include "lcp.h" 5936285Sbrian#include "lqr.h" 6036285Sbrian#include "hdlc.h" 6136285Sbrian#include "async.h" 6236285Sbrian#include "ccp.h" 6336285Sbrian#include "link.h" 6436285Sbrian#include "descriptor.h" 6536285Sbrian#include "physical.h" 6636285Sbrian#include "chat.h" 6736285Sbrian#include "lcpproto.h" 6836285Sbrian#include "filter.h" 6936285Sbrian#include "mp.h" 7036285Sbrian#include "chap.h" 7138174Sbrian#include "cbcp.h" 7236285Sbrian#include "datalink.h" 7336285Sbrian#include "bundle.h" 7436285Sbrian#include "ip.h" 7536285Sbrian#include "prompt.h" 7636285Sbrian#include "id.h" 7736285Sbrian#include "arp.h" 7836285Sbrian 7936285Sbrianvoid 8036285Sbrianpeerid_Init(struct peerid *peer) 8136285Sbrian{ 8236285Sbrian peer->enddisc.class = 0; 8336285Sbrian *peer->enddisc.address = '\0'; 8436285Sbrian peer->enddisc.len = 0; 8536285Sbrian *peer->authname = '\0'; 8636285Sbrian} 8736285Sbrian 8836285Sbrianint 8936285Sbrianpeerid_Equal(const struct peerid *p1, const struct peerid *p2) 9036285Sbrian{ 9136285Sbrian return !strcmp(p1->authname, p2->authname) && 9236285Sbrian p1->enddisc.class == p2->enddisc.class && 9336285Sbrian p1->enddisc.len == p2->enddisc.len && 9436285Sbrian !memcmp(p1->enddisc.address, p2->enddisc.address, p1->enddisc.len); 9536285Sbrian} 9636285Sbrian 9736285Sbrianstatic u_int32_t 9836285Sbrianinc_seq(unsigned is12bit, u_int32_t seq) 9936285Sbrian{ 10036285Sbrian seq++; 10136285Sbrian if (is12bit) { 10236285Sbrian if (seq & 0xfffff000) 10336285Sbrian seq = 0; 10436285Sbrian } else if (seq & 0xff000000) 10536285Sbrian seq = 0; 10636285Sbrian return seq; 10736285Sbrian} 10836285Sbrian 10936285Sbrianstatic int 11036285Sbrianisbefore(unsigned is12bit, u_int32_t seq1, u_int32_t seq2) 11136285Sbrian{ 11236285Sbrian u_int32_t max = (is12bit ? 0xfff : 0xffffff) - 0x200; 11336285Sbrian 11436285Sbrian if (seq1 > max) { 11536285Sbrian if (seq2 < 0x200 || seq2 > seq1) 11636285Sbrian return 1; 11736285Sbrian } else if ((seq1 > 0x200 || seq2 <= max) && seq1 < seq2) 11836285Sbrian return 1; 11936285Sbrian 12036285Sbrian return 0; 12136285Sbrian} 12236285Sbrian 12336285Sbrianstatic int 12436285Sbrianmp_ReadHeader(struct mp *mp, struct mbuf *m, struct mp_header *header) 12536285Sbrian{ 12636285Sbrian if (mp->local_is12bit) { 12736285Sbrian header->seq = ntohs(*(u_int16_t *)MBUF_CTOP(m)); 12836285Sbrian if (header->seq & 0x3000) { 12936285Sbrian log_Printf(LogWARN, "Oops - MP header without required zero bits\n"); 13036285Sbrian return 0; 13136285Sbrian } 13236285Sbrian header->begin = header->seq & 0x8000 ? 1 : 0; 13336285Sbrian header->end = header->seq & 0x4000 ? 1 : 0; 13436285Sbrian header->seq &= 0x0fff; 13536285Sbrian return 2; 13636285Sbrian } else { 13736285Sbrian header->seq = ntohl(*(u_int32_t *)MBUF_CTOP(m)); 13836285Sbrian if (header->seq & 0x3f000000) { 13936285Sbrian log_Printf(LogWARN, "Oops - MP header without required zero bits\n"); 14036285Sbrian return 0; 14136285Sbrian } 14236285Sbrian header->begin = header->seq & 0x80000000 ? 1 : 0; 14336285Sbrian header->end = header->seq & 0x40000000 ? 1 : 0; 14436285Sbrian header->seq &= 0x00ffffff; 14536285Sbrian return 4; 14636285Sbrian } 14736285Sbrian} 14836285Sbrian 14936285Sbrianstatic void 15036285Sbrianmp_LayerStart(void *v, struct fsm *fp) 15136285Sbrian{ 15236285Sbrian /* The given FSM (ccp) is about to start up ! */ 15336285Sbrian} 15436285Sbrian 15536285Sbrianstatic void 15636285Sbrianmp_LayerUp(void *v, struct fsm *fp) 15736285Sbrian{ 15836285Sbrian /* The given fsm (ccp) is now up */ 15936285Sbrian} 16036285Sbrian 16136285Sbrianstatic void 16236285Sbrianmp_LayerDown(void *v, struct fsm *fp) 16336285Sbrian{ 16436285Sbrian /* The given FSM (ccp) has been told to come down */ 16536285Sbrian} 16636285Sbrian 16736285Sbrianstatic void 16836285Sbrianmp_LayerFinish(void *v, struct fsm *fp) 16936285Sbrian{ 17036285Sbrian /* The given fsm (ccp) is now down */ 17136285Sbrian if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE) 17236285Sbrian fsm_Open(fp); /* CCP goes to ST_STOPPED */ 17336285Sbrian} 17436285Sbrian 17536285Sbrianvoid 17636285Sbrianmp_Init(struct mp *mp, struct bundle *bundle) 17736285Sbrian{ 17836285Sbrian mp->peer_is12bit = mp->local_is12bit = 0; 17936285Sbrian mp->peer_mrru = mp->local_mrru = 0; 18036285Sbrian 18136285Sbrian peerid_Init(&mp->peer); 18236285Sbrian 18336285Sbrian mp->out.seq = 0; 18436285Sbrian mp->out.link = 0; 18536285Sbrian mp->seq.min_in = 0; 18636285Sbrian mp->seq.next_in = 0; 18736285Sbrian mp->inbufs = NULL; 18836285Sbrian mp->bundle = bundle; 18936285Sbrian 19036285Sbrian mp->link.type = MP_LINK; 19136285Sbrian mp->link.name = "mp"; 19236285Sbrian mp->link.len = sizeof *mp; 19336285Sbrian 19436285Sbrian throughput_init(&mp->link.throughput); 19536285Sbrian memset(mp->link.Queue, '\0', sizeof mp->link.Queue); 19636285Sbrian memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in); 19736285Sbrian memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out); 19836285Sbrian 19936285Sbrian mp->fsmp.LayerStart = mp_LayerStart; 20036285Sbrian mp->fsmp.LayerUp = mp_LayerUp; 20136285Sbrian mp->fsmp.LayerDown = mp_LayerDown; 20236285Sbrian mp->fsmp.LayerFinish = mp_LayerFinish; 20336285Sbrian mp->fsmp.object = mp; 20436285Sbrian 20536285Sbrian mpserver_Init(&mp->server); 20636285Sbrian 20736285Sbrian mp->cfg.mrru = 0; 20836285Sbrian mp->cfg.shortseq = NEG_ENABLED|NEG_ACCEPTED; 20936285Sbrian mp->cfg.enddisc.class = 0; 21036285Sbrian *mp->cfg.enddisc.address = '\0'; 21136285Sbrian mp->cfg.enddisc.len = 0; 21236285Sbrian 21336285Sbrian lcp_Init(&mp->link.lcp, mp->bundle, &mp->link, NULL); 21436285Sbrian ccp_Init(&mp->link.ccp, mp->bundle, &mp->link, &mp->fsmp); 21536285Sbrian} 21636285Sbrian 21736285Sbrianint 21836285Sbrianmp_Up(struct mp *mp, struct datalink *dl) 21936285Sbrian{ 22036285Sbrian struct lcp *lcp = &dl->physical->link.lcp; 22136285Sbrian 22236285Sbrian if (mp->active) { 22336285Sbrian /* We're adding a link - do a last validation on our parameters */ 22436285Sbrian if (!peerid_Equal(&dl->peer, &mp->peer)) { 22536285Sbrian log_Printf(LogPHASE, "%s: Inappropriate peer !\n", dl->name); 22636285Sbrian return MP_FAILED; 22736285Sbrian } 22836285Sbrian if (mp->local_mrru != lcp->want_mrru || 22936285Sbrian mp->peer_mrru != lcp->his_mrru || 23036285Sbrian mp->local_is12bit != lcp->want_shortseq || 23136285Sbrian mp->peer_is12bit != lcp->his_shortseq) { 23236285Sbrian log_Printf(LogPHASE, "%s: Invalid MRRU/SHORTSEQ MP parameters !\n", 23336285Sbrian dl->name); 23436285Sbrian return MP_FAILED; 23536285Sbrian } 23636285Sbrian return MP_ADDED; 23736285Sbrian } else { 23836285Sbrian /* First link in multilink mode */ 23936285Sbrian 24036285Sbrian mp->local_mrru = lcp->want_mrru; 24136285Sbrian mp->peer_mrru = lcp->his_mrru; 24236285Sbrian mp->local_is12bit = lcp->want_shortseq; 24336285Sbrian mp->peer_is12bit = lcp->his_shortseq; 24436285Sbrian mp->peer = dl->peer; 24536285Sbrian 24636285Sbrian throughput_init(&mp->link.throughput); 24736285Sbrian memset(mp->link.Queue, '\0', sizeof mp->link.Queue); 24836285Sbrian memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in); 24936285Sbrian memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out); 25036285Sbrian 25136285Sbrian mp->out.seq = 0; 25236285Sbrian mp->out.link = 0; 25336285Sbrian mp->seq.min_in = 0; 25436285Sbrian mp->seq.next_in = 0; 25536285Sbrian 25636285Sbrian /* 25736285Sbrian * Now we create our server socket. 25836285Sbrian * If it already exists, join it. Otherwise, create and own it 25936285Sbrian */ 26036285Sbrian switch (mpserver_Open(&mp->server, &mp->peer)) { 26136285Sbrian case MPSERVER_CONNECTED: 26236285Sbrian log_Printf(LogPHASE, "mp: Transfer link on %s\n", 26336285Sbrian mp->server.socket.sun_path); 26436285Sbrian mp->server.send.dl = dl; /* Defer 'till it's safe to send */ 26536285Sbrian return MP_LINKSENT; 26636285Sbrian case MPSERVER_FAILED: 26736285Sbrian return MP_FAILED; 26836285Sbrian case MPSERVER_LISTENING: 26936285Sbrian log_Printf(LogPHASE, "mp: Listening on %s\n", mp->server.socket.sun_path); 27036285Sbrian log_Printf(LogPHASE, " First link: %s\n", dl->name); 27136285Sbrian 27236285Sbrian /* Re-point our IPCP layer at our MP link */ 27336285Sbrian ipcp_SetLink(&mp->bundle->ncp.ipcp, &mp->link); 27436285Sbrian 27536285Sbrian /* Our lcp's already up 'cos of the NULL parent */ 27637320Sbrian if (ccp_SetOpenMode(&mp->link.ccp)) { 27737320Sbrian fsm_Up(&mp->link.ccp.fsm); 27837320Sbrian fsm_Open(&mp->link.ccp.fsm); 27937320Sbrian } 28036285Sbrian 28136285Sbrian mp->active = 1; 28236285Sbrian break; 28336285Sbrian } 28436285Sbrian } 28536285Sbrian 28636285Sbrian return MP_UP; 28736285Sbrian} 28836285Sbrian 28936285Sbrianvoid 29036285Sbrianmp_Down(struct mp *mp) 29136285Sbrian{ 29236285Sbrian if (mp->active) { 29336285Sbrian struct mbuf *next; 29436285Sbrian 29536285Sbrian /* Don't want any more of these */ 29636285Sbrian mpserver_Close(&mp->server); 29736285Sbrian 29836285Sbrian /* CCP goes down with a bang */ 29937060Sbrian fsm2initial(&mp->link.ccp.fsm); 30036285Sbrian 30136285Sbrian /* Received fragments go in the bit-bucket */ 30236285Sbrian while (mp->inbufs) { 30336285Sbrian next = mp->inbufs->pnext; 30436285Sbrian mbuf_Free(mp->inbufs); 30536285Sbrian mp->inbufs = next; 30636285Sbrian } 30736285Sbrian 30836285Sbrian peerid_Init(&mp->peer); 30936285Sbrian mp->active = 0; 31036285Sbrian } 31136285Sbrian} 31236285Sbrian 31336285Sbrianvoid 31436285Sbrianmp_linkInit(struct mp_link *mplink) 31536285Sbrian{ 31636285Sbrian mplink->seq = 0; 31736285Sbrian mplink->weight = 1500; 31836285Sbrian} 31936285Sbrian 32036285Sbrianvoid 32136285Sbrianmp_Input(struct mp *mp, struct mbuf *m, struct physical *p) 32236285Sbrian{ 32336285Sbrian struct mp_header mh, h; 32436285Sbrian struct mbuf *q, *last; 32536285Sbrian int32_t seq; 32636285Sbrian 32736312Sbrian /* 32836312Sbrian * When `m' and `p' are NULL, it means our oldest link has gone down. 32936312Sbrian * We want to determine a new min, and process any intermediate stuff 33036312Sbrian * as normal 33136312Sbrian */ 33236312Sbrian 33336312Sbrian if (m && mp_ReadHeader(mp, m, &mh) == 0) { 33436285Sbrian mbuf_Free(m); 33536285Sbrian return; 33636285Sbrian } 33736285Sbrian 33836312Sbrian if (p) { 33936312Sbrian seq = p->dl->mp.seq; 34036312Sbrian p->dl->mp.seq = mh.seq; 34136312Sbrian } else 34236312Sbrian seq = mp->seq.min_in; 34336312Sbrian 34436285Sbrian if (mp->seq.min_in == seq) { 34536285Sbrian /* 34636285Sbrian * We've received new data on the link that has our min (oldest) seq. 34736285Sbrian * Figure out which link now has the smallest (oldest) seq. 34836285Sbrian */ 34936285Sbrian struct datalink *dl; 35036285Sbrian 35136312Sbrian mp->seq.min_in = (u_int32_t)-1; 35236285Sbrian for (dl = mp->bundle->links; dl; dl = dl->next) 35336312Sbrian if (dl->state == DATALINK_OPEN && 35436312Sbrian (mp->seq.min_in == -1 || 35536312Sbrian isbefore(mp->local_is12bit, dl->mp.seq, mp->seq.min_in))) 35636285Sbrian mp->seq.min_in = dl->mp.seq; 35736285Sbrian } 35836285Sbrian 35936285Sbrian /* 36036285Sbrian * Now process as many of our fragments as we can, adding our new 36136285Sbrian * fragment in as we go, and ordering with the oldest at the top of 36236285Sbrian * the queue. 36336285Sbrian */ 36436285Sbrian 36536285Sbrian if (!mp->inbufs) { 36636285Sbrian mp->inbufs = m; 36736285Sbrian m = NULL; 36836285Sbrian } 36936285Sbrian 37036285Sbrian last = NULL; 37136285Sbrian seq = mp->seq.next_in; 37236285Sbrian q = mp->inbufs; 37336285Sbrian while (q) { 37436285Sbrian mp_ReadHeader(mp, q, &h); 37536285Sbrian if (m && isbefore(mp->local_is12bit, mh.seq, h.seq)) { 37636285Sbrian /* Our received fragment fits in before this one, so link it in */ 37736285Sbrian if (last) 37836285Sbrian last->pnext = m; 37936285Sbrian else 38036285Sbrian mp->inbufs = m; 38136285Sbrian m->pnext = q; 38236285Sbrian q = m; 38336285Sbrian h = mh; 38436285Sbrian m = NULL; 38536285Sbrian } 38636285Sbrian 38736285Sbrian if (h.seq != seq) { 38836285Sbrian /* we're missing something :-( */ 38936285Sbrian if (mp->seq.min_in > seq) { 39036285Sbrian /* we're never gonna get it */ 39136285Sbrian struct mbuf *next; 39236285Sbrian 39336285Sbrian /* Zap all older fragments */ 39436285Sbrian while (mp->inbufs != q) { 39536285Sbrian log_Printf(LogDEBUG, "Drop frag\n"); 39636285Sbrian next = mp->inbufs->pnext; 39736285Sbrian mbuf_Free(mp->inbufs); 39836285Sbrian mp->inbufs = next; 39936285Sbrian } 40036285Sbrian 40136285Sbrian /* 40236285Sbrian * Zap everything until the next `end' fragment OR just before 40336285Sbrian * the next `begin' fragment OR 'till seq.min_in - whichever 40436285Sbrian * comes first. 40536285Sbrian */ 40636285Sbrian do { 40736285Sbrian mp_ReadHeader(mp, mp->inbufs, &h); 40836285Sbrian if (h.begin) { 40936285Sbrian /* We might be able to process this ! */ 41036285Sbrian h.seq--; /* We're gonna look for fragment with h.seq+1 */ 41136285Sbrian break; 41236285Sbrian } 41336285Sbrian next = mp->inbufs->pnext; 41436285Sbrian log_Printf(LogDEBUG, "Drop frag %u\n", h.seq); 41536285Sbrian mbuf_Free(mp->inbufs); 41636285Sbrian mp->inbufs = next; 41736285Sbrian } while (mp->inbufs && (h.seq >= mp->seq.min_in || h.end)); 41836285Sbrian 41936285Sbrian /* 42036285Sbrian * Continue processing things from here. 42136285Sbrian * This deals with the possibility that we received a fragment 42236285Sbrian * on the slowest link that invalidates some of our data (because 42336285Sbrian * of the hole at `q'), but where there are subsequent `whole' 42436285Sbrian * packets that have already been received. 42536285Sbrian */ 42636285Sbrian 42736285Sbrian mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq); 42836285Sbrian last = NULL; 42936285Sbrian q = mp->inbufs; 43036285Sbrian } else 43136285Sbrian /* we may still receive the missing fragment */ 43236285Sbrian break; 43336285Sbrian } else if (h.end) { 43436285Sbrian /* We've got something, reassemble */ 43536285Sbrian struct mbuf **frag = &q; 43636285Sbrian int len; 43736285Sbrian u_long first = -1; 43836285Sbrian 43936285Sbrian do { 44036285Sbrian *frag = mp->inbufs; 44136285Sbrian mp->inbufs = mp->inbufs->pnext; 44236285Sbrian len = mp_ReadHeader(mp, *frag, &h); 44336285Sbrian if (first == -1) 44436285Sbrian first = h.seq; 44536285Sbrian (*frag)->offset += len; 44636285Sbrian (*frag)->cnt -= len; 44736285Sbrian (*frag)->pnext = NULL; 44836285Sbrian if (frag == &q && !h.begin) { 44936285Sbrian log_Printf(LogWARN, "Oops - MP frag %lu should have a begin flag\n", 45036285Sbrian (u_long)h.seq); 45136285Sbrian mbuf_Free(q); 45236285Sbrian q = NULL; 45336285Sbrian } else if (frag != &q && h.begin) { 45436285Sbrian log_Printf(LogWARN, "Oops - MP frag %lu should have an end flag\n", 45536285Sbrian (u_long)h.seq - 1); 45636285Sbrian /* 45736285Sbrian * Stuff our fragment back at the front of the queue and zap 45836285Sbrian * our half-assembed packet. 45936285Sbrian */ 46036285Sbrian (*frag)->pnext = mp->inbufs; 46136285Sbrian mp->inbufs = *frag; 46236285Sbrian *frag = NULL; 46336285Sbrian mbuf_Free(q); 46436285Sbrian q = NULL; 46536285Sbrian frag = &q; 46636285Sbrian h.end = 0; /* just in case it's a whole packet */ 46736285Sbrian } else 46836285Sbrian do 46936285Sbrian frag = &(*frag)->next; 47036285Sbrian while (*frag != NULL); 47136285Sbrian } while (!h.end); 47236285Sbrian 47336285Sbrian if (q) { 47436285Sbrian u_short proto; 47536285Sbrian u_char ch; 47636285Sbrian 47736285Sbrian q = mbuf_Read(q, &ch, 1); 47836285Sbrian proto = ch; 47936285Sbrian if (!(proto & 1)) { 48036285Sbrian q = mbuf_Read(q, &ch, 1); 48136285Sbrian proto <<= 8; 48236285Sbrian proto += ch; 48336285Sbrian } 48436285Sbrian if (log_IsKept(LogDEBUG)) 48536285Sbrian log_Printf(LogDEBUG, "MP: Reassembled frags %ld-%lu, length %d\n", 48636285Sbrian first, (u_long)h.seq, mbuf_Length(q)); 48736285Sbrian hdlc_DecodePacket(mp->bundle, proto, q, &mp->link); 48836285Sbrian } 48936285Sbrian 49036285Sbrian mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq); 49136285Sbrian last = NULL; 49236285Sbrian q = mp->inbufs; 49336285Sbrian } else { 49436285Sbrian /* Look for the next fragment */ 49536285Sbrian seq = inc_seq(mp->local_is12bit, seq); 49636285Sbrian last = q; 49736285Sbrian q = q->pnext; 49836285Sbrian } 49936285Sbrian } 50036285Sbrian 50136285Sbrian if (m) { 50236285Sbrian /* We still have to find a home for our new fragment */ 50336285Sbrian last = NULL; 50436285Sbrian for (q = mp->inbufs; q; last = q, q = q->pnext) { 50536285Sbrian mp_ReadHeader(mp, q, &h); 50636285Sbrian if (isbefore(mp->local_is12bit, mh.seq, h.seq)) 50736285Sbrian break; 50836285Sbrian } 50936285Sbrian /* Our received fragment fits in here */ 51036285Sbrian if (last) 51136285Sbrian last->pnext = m; 51236285Sbrian else 51336285Sbrian mp->inbufs = m; 51436285Sbrian m->pnext = q; 51536285Sbrian } 51636285Sbrian} 51736285Sbrian 51836285Sbrianstatic void 51936285Sbrianmp_Output(struct mp *mp, struct link *l, struct mbuf *m, u_int32_t begin, 52036285Sbrian u_int32_t end) 52136285Sbrian{ 52236285Sbrian struct mbuf *mo; 52336285Sbrian 52436285Sbrian /* Stuff an MP header on the front of our packet and send it */ 52536285Sbrian mo = mbuf_Alloc(4, MB_MP); 52636285Sbrian mo->next = m; 52736285Sbrian if (mp->peer_is12bit) { 52836285Sbrian u_int16_t *seq16; 52936285Sbrian 53036285Sbrian seq16 = (u_int16_t *)MBUF_CTOP(mo); 53136285Sbrian *seq16 = htons((begin << 15) | (end << 14) | (u_int16_t)mp->out.seq); 53236285Sbrian mo->cnt = 2; 53336285Sbrian } else { 53436285Sbrian u_int32_t *seq32; 53536285Sbrian 53636285Sbrian seq32 = (u_int32_t *)MBUF_CTOP(mo); 53736285Sbrian *seq32 = htonl((begin << 31) | (end << 30) | (u_int32_t)mp->out.seq); 53836285Sbrian mo->cnt = 4; 53936285Sbrian } 54036285Sbrian if (log_IsKept(LogDEBUG)) 54136285Sbrian log_Printf(LogDEBUG, "MP[frag %d]: Send %d bytes on link `%s'\n", 54236285Sbrian mp->out.seq, mbuf_Length(mo), l->name); 54336285Sbrian mp->out.seq = inc_seq(mp->peer_is12bit, mp->out.seq); 54436285Sbrian 54536285Sbrian if (!ccp_Compress(&l->ccp, l, PRI_NORMAL, PROTO_MP, mo)) 54636285Sbrian hdlc_Output(l, PRI_NORMAL, PROTO_MP, mo); 54736285Sbrian} 54836285Sbrian 54936285Sbrianint 55036285Sbrianmp_FillQueues(struct bundle *bundle) 55136285Sbrian{ 55236285Sbrian struct mp *mp = &bundle->ncp.mp; 55336285Sbrian struct datalink *dl, *fdl; 55436285Sbrian int total, add, len, thislink, nlinks; 55536285Sbrian u_int32_t begin, end; 55636285Sbrian struct mbuf *m, *mo; 55736285Sbrian 55836285Sbrian thislink = nlinks = 0; 55936285Sbrian for (fdl = NULL, dl = bundle->links; dl; dl = dl->next) { 56036312Sbrian /* Include non-open links here as mp->out.link will stay more correct */ 56136285Sbrian if (!fdl) { 56236285Sbrian if (thislink == mp->out.link) 56336285Sbrian fdl = dl; 56436285Sbrian else 56536285Sbrian thislink++; 56636285Sbrian } 56736285Sbrian nlinks++; 56836285Sbrian } 56936285Sbrian 57036285Sbrian if (!fdl) { 57136285Sbrian fdl = bundle->links; 57236285Sbrian if (!fdl) 57336285Sbrian return 0; 57436285Sbrian thislink = 0; 57536285Sbrian } 57636285Sbrian 57736285Sbrian total = 0; 57836285Sbrian for (dl = fdl; nlinks > 0; dl = dl->next, nlinks--, thislink++) { 57936285Sbrian if (!dl) { 58036285Sbrian dl = bundle->links; 58136285Sbrian thislink = 0; 58236285Sbrian } 58336285Sbrian 58436285Sbrian if (dl->state != DATALINK_OPEN) 58536285Sbrian continue; 58636285Sbrian 58736285Sbrian if (dl->physical->out) 58836285Sbrian /* this link has suffered a short write. Let it continue */ 58936285Sbrian continue; 59036285Sbrian 59136285Sbrian add = link_QueueLen(&dl->physical->link); 59236285Sbrian total += add; 59336285Sbrian if (add) 59436285Sbrian /* this link has got stuff already queued. Let it continue */ 59536285Sbrian continue; 59636285Sbrian 59736285Sbrian if (!link_QueueLen(&mp->link) && !ip_FlushPacket(&mp->link, bundle)) 59836285Sbrian /* Nothing else to send */ 59936285Sbrian break; 60036285Sbrian 60136285Sbrian m = link_Dequeue(&mp->link); 60236285Sbrian len = mbuf_Length(m); 60336285Sbrian begin = 1; 60436285Sbrian end = 0; 60536285Sbrian 60636285Sbrian while (!end) { 60736285Sbrian if (dl->state == DATALINK_OPEN) { 60836285Sbrian if (len <= dl->mp.weight + LINK_MINWEIGHT) { 60936285Sbrian /* 61036285Sbrian * XXX: Should we remember how much of our `weight' wasn't sent 61136285Sbrian * so that we can compensate next time ? 61236285Sbrian */ 61336285Sbrian mo = m; 61436285Sbrian end = 1; 61536285Sbrian } else { 61636285Sbrian mo = mbuf_Alloc(dl->mp.weight, MB_MP); 61736285Sbrian mo->cnt = dl->mp.weight; 61836285Sbrian len -= mo->cnt; 61936285Sbrian m = mbuf_Read(m, MBUF_CTOP(mo), mo->cnt); 62036285Sbrian } 62136285Sbrian mp_Output(mp, &dl->physical->link, mo, begin, end); 62236285Sbrian begin = 0; 62336285Sbrian } 62436285Sbrian 62536285Sbrian if (!end) { 62636285Sbrian nlinks--; 62736285Sbrian dl = dl->next; 62836285Sbrian if (!dl) { 62936285Sbrian dl = bundle->links; 63036285Sbrian thislink = 0; 63136285Sbrian } else 63236285Sbrian thislink++; 63336285Sbrian } 63436285Sbrian } 63536285Sbrian } 63636285Sbrian mp->out.link = thislink; /* Start here next time */ 63736285Sbrian 63836285Sbrian return total; 63936285Sbrian} 64036285Sbrian 64136285Sbrianint 64236285Sbrianmp_SetDatalinkWeight(struct cmdargs const *arg) 64336285Sbrian{ 64436285Sbrian int val; 64536285Sbrian 64636285Sbrian if (arg->argc != arg->argn+1) 64736285Sbrian return -1; 64836285Sbrian 64936285Sbrian val = atoi(arg->argv[arg->argn]); 65036285Sbrian if (val < LINK_MINWEIGHT) { 65136285Sbrian log_Printf(LogWARN, "Link weights must not be less than %d\n", 65236285Sbrian LINK_MINWEIGHT); 65336285Sbrian return 1; 65436285Sbrian } 65536285Sbrian arg->cx->mp.weight = val; 65636285Sbrian return 0; 65736285Sbrian} 65836285Sbrian 65936285Sbrianint 66036285Sbrianmp_ShowStatus(struct cmdargs const *arg) 66136285Sbrian{ 66236285Sbrian struct mp *mp = &arg->bundle->ncp.mp; 66336285Sbrian 66436285Sbrian prompt_Printf(arg->prompt, "Multilink is %sactive\n", mp->active ? "" : "in"); 66536285Sbrian if (mp->active) { 66636285Sbrian struct mbuf *m; 66736285Sbrian int bufs = 0; 66836285Sbrian 66936285Sbrian prompt_Printf(arg->prompt, "Socket: %s\n", 67036285Sbrian mp->server.socket.sun_path); 67136285Sbrian for (m = mp->inbufs; m; m = m->pnext) 67236285Sbrian bufs++; 67336285Sbrian prompt_Printf(arg->prompt, "Pending frags: %d\n", bufs); 67436285Sbrian } 67536285Sbrian 67636285Sbrian prompt_Printf(arg->prompt, "\nMy Side:\n"); 67736285Sbrian if (mp->active) { 67836285Sbrian prompt_Printf(arg->prompt, " MRRU: %u\n", mp->local_mrru); 67936285Sbrian prompt_Printf(arg->prompt, " Short Seq: %s\n", 68036285Sbrian mp->local_is12bit ? "on" : "off"); 68136285Sbrian } 68236285Sbrian prompt_Printf(arg->prompt, " Discriminator: %s\n", 68336285Sbrian mp_Enddisc(mp->cfg.enddisc.class, mp->cfg.enddisc.address, 68436285Sbrian mp->cfg.enddisc.len)); 68536285Sbrian 68636285Sbrian prompt_Printf(arg->prompt, "\nHis Side:\n"); 68736285Sbrian if (mp->active) { 68836285Sbrian prompt_Printf(arg->prompt, " Auth Name: %s\n", mp->peer.authname); 68936285Sbrian prompt_Printf(arg->prompt, " Next SEQ: %u\n", mp->out.seq); 69036285Sbrian prompt_Printf(arg->prompt, " MRRU: %u\n", mp->peer_mrru); 69136285Sbrian prompt_Printf(arg->prompt, " Short Seq: %s\n", 69236285Sbrian mp->peer_is12bit ? "on" : "off"); 69336285Sbrian } 69436285Sbrian prompt_Printf(arg->prompt, " Discriminator: %s\n", 69536285Sbrian mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address, 69636285Sbrian mp->peer.enddisc.len)); 69736285Sbrian 69836285Sbrian prompt_Printf(arg->prompt, "\nDefaults:\n"); 69936285Sbrian 70036285Sbrian prompt_Printf(arg->prompt, " MRRU: "); 70136285Sbrian if (mp->cfg.mrru) 70236285Sbrian prompt_Printf(arg->prompt, "%d (multilink enabled)\n", mp->cfg.mrru); 70336285Sbrian else 70436285Sbrian prompt_Printf(arg->prompt, "disabled\n"); 70536285Sbrian prompt_Printf(arg->prompt, " Short Seq: %s\n", 70636285Sbrian command_ShowNegval(mp->cfg.shortseq)); 70736285Sbrian 70836285Sbrian return 0; 70936285Sbrian} 71036285Sbrian 71136285Sbrianconst char * 71236285Sbrianmp_Enddisc(u_char c, const char *address, int len) 71336285Sbrian{ 71437010Sbrian static char result[100]; /* Used immediately after it's returned */ 71536285Sbrian int f, header; 71636285Sbrian 71736285Sbrian switch (c) { 71836285Sbrian case ENDDISC_NULL: 71936285Sbrian sprintf(result, "Null Class"); 72036285Sbrian break; 72136285Sbrian 72236285Sbrian case ENDDISC_LOCAL: 72336285Sbrian snprintf(result, sizeof result, "Local Addr: %.*s", len, address); 72436285Sbrian break; 72536285Sbrian 72636285Sbrian case ENDDISC_IP: 72736285Sbrian if (len == 4) 72836285Sbrian snprintf(result, sizeof result, "IP %s", 72936285Sbrian inet_ntoa(*(const struct in_addr *)address)); 73036285Sbrian else 73136285Sbrian sprintf(result, "IP[%d] ???", len); 73236285Sbrian break; 73336285Sbrian 73436285Sbrian case ENDDISC_MAC: 73536285Sbrian if (len == 6) { 73636285Sbrian const u_char *m = (const u_char *)address; 73736285Sbrian snprintf(result, sizeof result, "MAC %02x:%02x:%02x:%02x:%02x:%02x", 73836285Sbrian m[0], m[1], m[2], m[3], m[4], m[5]); 73936285Sbrian } else 74036285Sbrian sprintf(result, "MAC[%d] ???", len); 74136285Sbrian break; 74236285Sbrian 74336285Sbrian case ENDDISC_MAGIC: 74436285Sbrian sprintf(result, "Magic: 0x"); 74536285Sbrian header = strlen(result); 74636285Sbrian if (len > sizeof result - header - 1) 74736285Sbrian len = sizeof result - header - 1; 74836285Sbrian for (f = 0; f < len; f++) 74936285Sbrian sprintf(result + header + 2 * f, "%02x", address[f]); 75036285Sbrian break; 75136285Sbrian 75236285Sbrian case ENDDISC_PSN: 75336285Sbrian snprintf(result, sizeof result, "PSN: %.*s", len, address); 75436285Sbrian break; 75536285Sbrian 75636285Sbrian default: 75736285Sbrian sprintf(result, "%d: ", (int)c); 75836285Sbrian header = strlen(result); 75936285Sbrian if (len > sizeof result - header - 1) 76036285Sbrian len = sizeof result - header - 1; 76136285Sbrian for (f = 0; f < len; f++) 76236285Sbrian sprintf(result + header + 2 * f, "%02x", address[f]); 76336285Sbrian break; 76436285Sbrian } 76536285Sbrian return result; 76636285Sbrian} 76736285Sbrian 76836285Sbrianint 76936285Sbrianmp_SetEnddisc(struct cmdargs const *arg) 77036285Sbrian{ 77136285Sbrian struct mp *mp = &arg->bundle->ncp.mp; 77236285Sbrian struct in_addr addr; 77336285Sbrian 77436285Sbrian if (bundle_Phase(arg->bundle) != PHASE_DEAD) { 77536285Sbrian log_Printf(LogWARN, "set enddisc: Only available at phase DEAD\n"); 77636285Sbrian return 1; 77736285Sbrian } 77836285Sbrian 77936285Sbrian if (arg->argc == arg->argn) { 78036285Sbrian mp->cfg.enddisc.class = 0; 78136285Sbrian *mp->cfg.enddisc.address = '\0'; 78236285Sbrian mp->cfg.enddisc.len = 0; 78336285Sbrian } else if (arg->argc > arg->argn) { 78436285Sbrian if (!strcasecmp(arg->argv[arg->argn], "label")) { 78536285Sbrian mp->cfg.enddisc.class = ENDDISC_LOCAL; 78636285Sbrian strcpy(mp->cfg.enddisc.address, arg->bundle->cfg.label); 78736285Sbrian mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address); 78836285Sbrian } else if (!strcasecmp(arg->argv[arg->argn], "ip")) { 78936285Sbrian if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY) 79036285Sbrian addr = arg->bundle->ncp.ipcp.cfg.my_range.ipaddr; 79136285Sbrian else 79236285Sbrian addr = arg->bundle->ncp.ipcp.my_ip; 79336285Sbrian memcpy(mp->cfg.enddisc.address, &addr.s_addr, sizeof addr.s_addr); 79436285Sbrian mp->cfg.enddisc.class = ENDDISC_IP; 79536285Sbrian mp->cfg.enddisc.len = sizeof arg->bundle->ncp.ipcp.my_ip.s_addr; 79636285Sbrian } else if (!strcasecmp(arg->argv[arg->argn], "mac")) { 79736285Sbrian struct sockaddr_dl hwaddr; 79836285Sbrian int s; 79936285Sbrian 80036285Sbrian if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY) 80136285Sbrian addr = arg->bundle->ncp.ipcp.cfg.my_range.ipaddr; 80236285Sbrian else 80336285Sbrian addr = arg->bundle->ncp.ipcp.my_ip; 80436285Sbrian 80536285Sbrian s = ID0socket(AF_INET, SOCK_DGRAM, 0); 80636285Sbrian if (s < 0) { 80736285Sbrian log_Printf(LogERROR, "set enddisc: socket(): %s\n", strerror(errno)); 80836285Sbrian return 2; 80936285Sbrian } 81036285Sbrian if (get_ether_addr(s, addr, &hwaddr)) { 81136285Sbrian mp->cfg.enddisc.class = ENDDISC_MAC; 81236285Sbrian memcpy(mp->cfg.enddisc.address, hwaddr.sdl_data + hwaddr.sdl_nlen, 81336285Sbrian hwaddr.sdl_alen); 81436285Sbrian mp->cfg.enddisc.len = hwaddr.sdl_alen; 81536285Sbrian } else { 81636285Sbrian log_Printf(LogWARN, "set enddisc: Can't locate MAC address for %s\n", 81736285Sbrian inet_ntoa(addr)); 81836285Sbrian close(s); 81936285Sbrian return 4; 82036285Sbrian } 82136285Sbrian close(s); 82236285Sbrian } else if (!strcasecmp(arg->argv[arg->argn], "magic")) { 82336285Sbrian int f; 82436285Sbrian 82536285Sbrian randinit(); 82636285Sbrian for (f = 0; f < 20; f += sizeof(long)) 82736285Sbrian *(long *)(mp->cfg.enddisc.address + f) = random(); 82836285Sbrian mp->cfg.enddisc.class = ENDDISC_MAGIC; 82936285Sbrian mp->cfg.enddisc.len = 20; 83036285Sbrian } else if (!strcasecmp(arg->argv[arg->argn], "psn")) { 83136285Sbrian if (arg->argc > arg->argn+1) { 83236285Sbrian mp->cfg.enddisc.class = ENDDISC_PSN; 83336285Sbrian strcpy(mp->cfg.enddisc.address, arg->argv[arg->argn+1]); 83436285Sbrian mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address); 83536285Sbrian } else { 83636285Sbrian log_Printf(LogWARN, "PSN endpoint requires additional data\n"); 83736285Sbrian return 5; 83836285Sbrian } 83936285Sbrian } else { 84036285Sbrian log_Printf(LogWARN, "%s: Unrecognised endpoint type\n", 84136285Sbrian arg->argv[arg->argn]); 84236285Sbrian return 6; 84336285Sbrian } 84436285Sbrian } 84536285Sbrian 84636285Sbrian return 0; 84736285Sbrian} 84836285Sbrian 84936285Sbrianstatic int 85036285Sbrianmpserver_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, 85136285Sbrian int *n) 85236285Sbrian{ 85336285Sbrian struct mpserver *s = descriptor2mpserver(d); 85436314Sbrian int result; 85536285Sbrian 85636314Sbrian result = 0; 85736285Sbrian if (s->send.dl != NULL) { 85836285Sbrian /* We've connect()ed */ 85936285Sbrian if (!link_QueueLen(&s->send.dl->physical->link) && 86036285Sbrian !s->send.dl->physical->out) { 86136285Sbrian /* Only send if we've transmitted all our data (i.e. the ConfigAck) */ 86236314Sbrian result -= datalink_RemoveFromSet(s->send.dl, r, w, e); 86336285Sbrian bundle_SendDatalink(s->send.dl, s->fd, &s->socket); 86436285Sbrian s->send.dl = NULL; 86536285Sbrian s->fd = -1; 86636285Sbrian } else 86736285Sbrian /* Never read from a datalink that's on death row ! */ 86836314Sbrian result -= datalink_RemoveFromSet(s->send.dl, r, NULL, NULL); 86936285Sbrian } else if (r && s->fd >= 0) { 87036285Sbrian if (*n < s->fd + 1) 87136285Sbrian *n = s->fd + 1; 87236285Sbrian FD_SET(s->fd, r); 87336285Sbrian log_Printf(LogTIMER, "mp: fdset(r) %d\n", s->fd); 87436314Sbrian result++; 87536285Sbrian } 87636314Sbrian return result; 87736285Sbrian} 87836285Sbrian 87936285Sbrianstatic int 88036285Sbrianmpserver_IsSet(struct descriptor *d, const fd_set *fdset) 88136285Sbrian{ 88236285Sbrian struct mpserver *s = descriptor2mpserver(d); 88336285Sbrian return s->fd >= 0 && FD_ISSET(s->fd, fdset); 88436285Sbrian} 88536285Sbrian 88636285Sbrianstatic void 88736285Sbrianmpserver_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset) 88836285Sbrian{ 88936285Sbrian struct mpserver *s = descriptor2mpserver(d); 89036285Sbrian struct sockaddr in; 89136285Sbrian int fd, size; 89236285Sbrian 89336285Sbrian size = sizeof in; 89436285Sbrian fd = accept(s->fd, &in, &size); 89536285Sbrian if (fd < 0) { 89636285Sbrian log_Printf(LogERROR, "mpserver_Read: accept(): %s\n", strerror(errno)); 89736285Sbrian return; 89836285Sbrian } 89936285Sbrian 90036285Sbrian if (in.sa_family == AF_LOCAL) 90136285Sbrian bundle_ReceiveDatalink(bundle, fd, (struct sockaddr_un *)&in); 90236345Sbrian else 90336345Sbrian close(fd); 90436285Sbrian} 90536285Sbrian 90637141Sbrianstatic int 90736285Sbrianmpserver_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset) 90836285Sbrian{ 90936285Sbrian /* We never want to write here ! */ 91037019Sbrian log_Printf(LogALERT, "mpserver_Write: Internal error: Bad call !\n"); 91137141Sbrian return 0; 91236285Sbrian} 91336285Sbrian 91436285Sbrianvoid 91536285Sbrianmpserver_Init(struct mpserver *s) 91636285Sbrian{ 91736285Sbrian s->desc.type = MPSERVER_DESCRIPTOR; 91836285Sbrian s->desc.UpdateSet = mpserver_UpdateSet; 91936285Sbrian s->desc.IsSet = mpserver_IsSet; 92036285Sbrian s->desc.Read = mpserver_Read; 92136285Sbrian s->desc.Write = mpserver_Write; 92236285Sbrian s->send.dl = NULL; 92336285Sbrian s->fd = -1; 92436285Sbrian memset(&s->socket, '\0', sizeof s->socket); 92536285Sbrian} 92636285Sbrian 92736285Sbrianint 92836285Sbrianmpserver_Open(struct mpserver *s, struct peerid *peer) 92936285Sbrian{ 93036285Sbrian int f, l; 93136285Sbrian mode_t mask; 93236285Sbrian 93336285Sbrian if (s->fd != -1) { 93437019Sbrian log_Printf(LogALERT, "Internal error ! mpserver already open\n"); 93536285Sbrian mpserver_Close(s); 93636285Sbrian } 93736285Sbrian 93836285Sbrian l = snprintf(s->socket.sun_path, sizeof s->socket.sun_path, "%sppp-%s-%02x-", 93936285Sbrian _PATH_VARRUN, peer->authname, peer->enddisc.class); 94036285Sbrian 94136285Sbrian for (f = 0; f < peer->enddisc.len && l < sizeof s->socket.sun_path - 2; f++) { 94236285Sbrian snprintf(s->socket.sun_path + l, sizeof s->socket.sun_path - l, 94336285Sbrian "%02x", *(u_char *)(peer->enddisc.address+f)); 94436285Sbrian l += 2; 94536285Sbrian } 94636285Sbrian 94736285Sbrian s->socket.sun_family = AF_LOCAL; 94836285Sbrian s->socket.sun_len = sizeof s->socket; 94936285Sbrian s->fd = ID0socket(PF_LOCAL, SOCK_STREAM, 0); 95036285Sbrian if (s->fd < 0) { 95136285Sbrian log_Printf(LogERROR, "mpserver: socket: %s\n", strerror(errno)); 95236285Sbrian return MPSERVER_FAILED; 95336285Sbrian } 95436285Sbrian 95536285Sbrian setsockopt(s->fd, SOL_SOCKET, SO_REUSEADDR, (struct sockaddr *)&s->socket, 95636285Sbrian sizeof s->socket); 95736285Sbrian mask = umask(0177); 95836285Sbrian if (ID0bind_un(s->fd, &s->socket) < 0) { 95936285Sbrian if (errno != EADDRINUSE) { 96036285Sbrian log_Printf(LogPHASE, "mpserver: can't create bundle socket %s (%s)\n", 96136285Sbrian s->socket.sun_path, strerror(errno)); 96236285Sbrian umask(mask); 96336285Sbrian close(s->fd); 96436285Sbrian s->fd = -1; 96536285Sbrian return MPSERVER_FAILED; 96636285Sbrian } 96736285Sbrian umask(mask); 96836285Sbrian if (ID0connect_un(s->fd, &s->socket) < 0) { 96936285Sbrian log_Printf(LogPHASE, "mpserver: can't connect to bundle socket %s (%s)\n", 97036285Sbrian s->socket.sun_path, strerror(errno)); 97136285Sbrian if (errno == ECONNREFUSED) 97236285Sbrian log_Printf(LogPHASE, " Has the previous server died badly ?\n"); 97336285Sbrian close(s->fd); 97436285Sbrian s->fd = -1; 97536285Sbrian return MPSERVER_FAILED; 97636285Sbrian } 97736285Sbrian 97836285Sbrian /* Donate our link to the other guy */ 97936285Sbrian return MPSERVER_CONNECTED; 98036285Sbrian } 98136285Sbrian 98236285Sbrian /* Listen for other ppp invocations that want to donate links */ 98336285Sbrian if (listen(s->fd, 5) != 0) { 98436285Sbrian log_Printf(LogERROR, "mpserver: Unable to listen to socket" 98536285Sbrian " - BUNDLE overload?\n"); 98636285Sbrian mpserver_Close(s); 98736285Sbrian } 98836285Sbrian 98936285Sbrian return MPSERVER_LISTENING; 99036285Sbrian} 99136285Sbrian 99236285Sbrianvoid 99336285Sbrianmpserver_Close(struct mpserver *s) 99436285Sbrian{ 99536285Sbrian if (s->send.dl != NULL) { 99636285Sbrian bundle_SendDatalink(s->send.dl, s->fd, &s->socket); 99736285Sbrian s->send.dl = NULL; 99836285Sbrian s->fd = -1; 99936285Sbrian } else if (s->fd >= 0) { 100036285Sbrian close(s->fd); 100136285Sbrian if (ID0unlink(s->socket.sun_path) == -1) 100236285Sbrian log_Printf(LogERROR, "%s: Failed to remove: %s\n", s->socket.sun_path, 100336285Sbrian strerror(errno)); 100436285Sbrian memset(&s->socket, '\0', sizeof s->socket); 100536285Sbrian s->fd = -1; 100636285Sbrian } 100736285Sbrian} 100836312Sbrian 100936312Sbrianvoid 101036312Sbrianmp_LinkLost(struct mp *mp, struct datalink *dl) 101136312Sbrian{ 101236312Sbrian if (mp->seq.min_in == dl->mp.seq) 101336312Sbrian /* We've lost the link that's holding everything up ! */ 101436312Sbrian mp_Input(mp, NULL, NULL); 101536312Sbrian} 1016