2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/param.h>
32 #include <netinet/in.h>
33 #include <netinet/in_systm.h>
34 #include <netinet/ip.h>
35 #include <arpa/inet.h>
36 #include <net/if_dl.h>
37 #include <sys/socket.h>
63 #include "throughput.h"
64 #include "slcompress.h"
74 #include "descriptor.h"
94 peerid_Init(struct peerid *peer)
96 peer->enddisc.class = 0;
97 *peer->enddisc.address = '\0';
98 peer->enddisc.len = 0;
99 *peer->authname = '\0';
103 peerid_Equal(const struct peerid *p1, const struct peerid *p2)
105 return !strcmp(p1->authname, p2->authname) &&
106 p1->enddisc.class == p2->enddisc.class &&
107 p1->enddisc.len == p2->enddisc.len &&
108 !memcmp(p1->enddisc.address, p2->enddisc.address, p1->enddisc.len);
112 inc_seq(unsigned is12bit, u_int32_t seq)
116 if (seq & 0xfffff000)
118 } else if (seq & 0xff000000)
124 isbefore(unsigned is12bit, u_int32_t seq1, u_int32_t seq2)
126 u_int32_t max = (is12bit ? 0xfff : 0xffffff) - 0x200;
129 if (seq2 < 0x200 || seq2 > seq1)
131 } else if ((seq1 > 0x200 || seq2 <= max) && seq1 < seq2)
138 mp_ReadHeader(struct mp *mp, struct mbuf *m, struct mp_header *header)
140 if (mp->local_is12bit) {
143 ua_ntohs(MBUF_CTOP(m), &val);
145 log_Printf(LogWARN, "Oops - MP header without required zero bits\n");
148 header->begin = val & 0x8000 ? 1 : 0;
149 header->end = val & 0x4000 ? 1 : 0;
150 header->seq = val & 0x0fff;
153 ua_ntohl(MBUF_CTOP(m), &header->seq);
154 if (header->seq & 0x3f000000) {
155 log_Printf(LogWARN, "Oops - MP header without required zero bits\n");
158 header->begin = header->seq & 0x80000000 ? 1 : 0;
159 header->end = header->seq & 0x40000000 ? 1 : 0;
160 header->seq &= 0x00ffffff;
166 mp_LayerStart(void *v __unused, struct fsm *fp __unused)
168 /* The given FSM (ccp) is about to start up ! */
172 mp_LayerUp(void *v __unused, struct fsm *fp)
174 /* The given fsm (ccp) is now up */
176 bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */
180 mp_LayerDown(void *v __unused, struct fsm *fp __unused)
182 /* The given FSM (ccp) has been told to come down */
186 mp_LayerFinish(void *v __unused, struct fsm *fp)
188 /* The given fsm (ccp) is now down */
189 if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
190 fsm_Open(fp); /* CCP goes to ST_STOPPED */
196 struct mp *mp = (struct mp *)v;
199 percent = MAX(mp->link.stats.total.in.OctetsPerSecond,
200 mp->link.stats.total.out.OctetsPerSecond) * 800 /
201 mp->bundle->bandwidth;
202 if (percent >= mp->cfg.autoload.max) {
203 log_Printf(LogDEBUG, "%d%% saturation - bring a link up ?\n", percent);
204 bundle_AutoAdjust(mp->bundle, percent, AUTO_UP);
205 } else if (percent <= mp->cfg.autoload.min) {
206 log_Printf(LogDEBUG, "%d%% saturation - bring a link down ?\n", percent);
207 bundle_AutoAdjust(mp->bundle, percent, AUTO_DOWN);
212 mp_StopAutoloadTimer(struct mp *mp)
214 throughput_stop(&mp->link.stats.total);
218 mp_CheckAutoloadTimer(struct mp *mp)
220 if (mp->link.stats.total.SamplePeriod != mp->cfg.autoload.period) {
221 throughput_destroy(&mp->link.stats.total);
222 throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
223 throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
226 if (bundle_WantAutoloadTimer(mp->bundle))
227 throughput_start(&mp->link.stats.total, "MP throughput", 1);
229 mp_StopAutoloadTimer(mp);
233 mp_RestartAutoloadTimer(struct mp *mp)
235 if (mp->link.stats.total.SamplePeriod != mp->cfg.autoload.period)
236 mp_CheckAutoloadTimer(mp);
238 throughput_clear(&mp->link.stats.total, THROUGHPUT_OVERALL, NULL);
242 mp_Init(struct mp *mp, struct bundle *bundle)
244 mp->peer_is12bit = mp->local_is12bit = 0;
245 mp->peer_mrru = mp->local_mrru = 0;
247 peerid_Init(&mp->peer);
251 mp->out.af = AF_INET;
257 mp->link.type = LOGICAL_LINK;
258 mp->link.name = "mp";
259 mp->link.len = sizeof *mp;
261 mp->cfg.autoload.period = SAMPLE_PERIOD;
262 mp->cfg.autoload.min = mp->cfg.autoload.max = 0;
263 throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
264 throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
265 mp->link.stats.parent = NULL;
266 mp->link.stats.gather = 0; /* Let the physical links gather stats */
267 memset(mp->link.Queue, '\0', sizeof mp->link.Queue);
268 memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in);
269 memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out);
271 mp->fsmp.LayerStart = mp_LayerStart;
272 mp->fsmp.LayerUp = mp_LayerUp;
273 mp->fsmp.LayerDown = mp_LayerDown;
274 mp->fsmp.LayerFinish = mp_LayerFinish;
275 mp->fsmp.object = mp;
277 mpserver_Init(&mp->server);
280 mp->cfg.shortseq = NEG_ENABLED|NEG_ACCEPTED;
281 mp->cfg.negenddisc = NEG_ENABLED|NEG_ACCEPTED;
282 mp->cfg.enddisc.class = 0;
283 *mp->cfg.enddisc.address = '\0';
284 mp->cfg.enddisc.len = 0;
286 lcp_Init(&mp->link.lcp, mp->bundle, &mp->link, NULL);
287 ccp_Init(&mp->link.ccp, mp->bundle, &mp->link, &mp->fsmp);
289 link_EmptyStack(&mp->link);
290 link_Stack(&mp->link, &protolayer);
291 link_Stack(&mp->link, &ccplayer);
292 link_Stack(&mp->link, &vjlayer);
294 link_Stack(&mp->link, &natlayer);
299 mp_Up(struct mp *mp, struct datalink *dl)
301 struct lcp *lcp = &dl->physical->link.lcp;
304 /* We're adding a link - do a last validation on our parameters */
305 if (!peerid_Equal(&dl->peer, &mp->peer)) {
306 log_Printf(LogPHASE, "%s: Inappropriate peer !\n", dl->name);
307 log_Printf(LogPHASE, " Attached to peer %s/%s\n", mp->peer.authname,
308 mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address,
309 mp->peer.enddisc.len));
310 log_Printf(LogPHASE, " New link is peer %s/%s\n", dl->peer.authname,
311 mp_Enddisc(dl->peer.enddisc.class, dl->peer.enddisc.address,
312 dl->peer.enddisc.len));
315 if (mp->local_mrru != lcp->want_mrru ||
316 mp->peer_mrru != lcp->his_mrru ||
317 mp->local_is12bit != lcp->want_shortseq ||
318 mp->peer_is12bit != lcp->his_shortseq) {
319 log_Printf(LogPHASE, "%s: Invalid MRRU/SHORTSEQ MP parameters !\n",
325 /* First link in multilink mode */
327 mp->local_mrru = lcp->want_mrru;
328 mp->peer_mrru = lcp->his_mrru;
329 mp->local_is12bit = lcp->want_shortseq;
330 mp->peer_is12bit = lcp->his_shortseq;
333 throughput_destroy(&mp->link.stats.total);
334 throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
335 throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
336 memset(mp->link.Queue, '\0', sizeof mp->link.Queue);
337 memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in);
338 memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out);
340 /* Tell the link who it belongs to */
341 dl->physical->link.stats.parent = &mp->link.stats.total;
345 mp->out.af = AF_INET;
350 * Now we create our server socket.
351 * If it already exists, join it. Otherwise, create and own it
353 switch (mpserver_Open(&mp->server, &mp->peer)) {
354 case MPSERVER_CONNECTED:
355 log_Printf(LogPHASE, "mp: Transfer link on %s\n",
356 mp->server.socket.sun_path);
357 mp->server.send.dl = dl; /* Defer 'till it's safe to send */
359 case MPSERVER_FAILED:
361 case MPSERVER_LISTENING:
362 log_Printf(LogPHASE, "mp: Listening on %s\n", mp->server.socket.sun_path);
363 log_Printf(LogPHASE, " First link: %s\n", dl->name);
365 /* Re-point our NCP layers at our MP link */
366 ncp_SetLink(&mp->bundle->ncp, &mp->link);
368 /* Our lcp's already up 'cos of the NULL parent */
369 if (ccp_SetOpenMode(&mp->link.ccp)) {
370 fsm_Up(&mp->link.ccp.fsm);
371 fsm_Open(&mp->link.ccp.fsm);
383 mp_Down(struct mp *mp)
389 mp_StopAutoloadTimer(mp);
391 /* Don't want any more of these */
392 mpserver_Close(&mp->server);
394 /* CCP goes down with a bang */
395 fsm2initial(&mp->link.ccp.fsm);
397 /* Received fragments go in the bit-bucket */
399 next = mp->inbufs->m_nextpkt;
404 peerid_Init(&mp->peer);
410 mp_linkInit(struct mp_link *mplink)
413 mplink->bandwidth = 0;
417 mp_Assemble(struct mp *mp, struct mbuf *m, struct physical *p)
419 struct mp_header mh, h;
420 struct mbuf *q, *last;
424 * When `m' and `p' are NULL, it means our oldest link has gone down.
425 * We want to determine a new min, and process any intermediate stuff
429 if (m && mp_ReadHeader(mp, m, &mh) == 0) {
436 p->dl->mp.seq = mh.seq;
438 seq = mp->seq.min_in;
440 if (mp->seq.min_in == seq) {
442 * We've received new data on the link that has our min (oldest) seq.
443 * Figure out which link now has the smallest (oldest) seq.
447 mp->seq.min_in = (u_int32_t)-1;
448 for (dl = mp->bundle->links; dl; dl = dl->next)
449 if (dl->state == DATALINK_OPEN &&
450 (mp->seq.min_in == (u_int32_t)-1 ||
451 isbefore(mp->local_is12bit, dl->mp.seq, mp->seq.min_in)))
452 mp->seq.min_in = dl->mp.seq;
456 * Now process as many of our fragments as we can, adding our new
457 * fragment in as we go, and ordering with the oldest at the top of
462 seq = mp->seq.next_in;
474 mp_ReadHeader(mp, q, &h);
476 if (m && isbefore(mp->local_is12bit, mh.seq, h.seq)) {
477 /* Our received fragment fits in before this one, so link it in */
490 /* we're missing something :-( */
491 if (isbefore(mp->local_is12bit, seq, mp->seq.min_in)) {
492 /* we're never gonna get it */
495 /* Zap all older fragments */
496 while (mp->inbufs != q) {
497 log_Printf(LogDEBUG, "Drop frag\n");
498 next = mp->inbufs->m_nextpkt;
504 * Zap everything until the next `end' fragment OR just before
505 * the next `begin' fragment OR 'till seq.min_in - whichever
509 mp_ReadHeader(mp, mp->inbufs, &h);
511 /* We might be able to process this ! */
512 h.seq--; /* We're gonna look for fragment with h.seq+1 */
515 next = mp->inbufs->m_nextpkt;
516 log_Printf(LogDEBUG, "Drop frag %u\n", h.seq);
519 } while (mp->inbufs && (isbefore(mp->local_is12bit, mp->seq.min_in,
523 * Continue processing things from here.
524 * This deals with the possibility that we received a fragment
525 * on the slowest link that invalidates some of our data (because
526 * of the hole at `q'), but where there are subsequent `whole'
527 * packets that have already been received.
530 mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq);
534 /* we may still receive the missing fragment */
537 /* We've got something, reassemble */
538 struct mbuf **frag = &q;
540 long long first = -1;
544 mp->inbufs = mp->inbufs->m_nextpkt;
545 len = mp_ReadHeader(mp, *frag, &h);
548 if (frag == &q && !h.begin) {
549 log_Printf(LogWARN, "Oops - MP frag %lu should have a begin flag\n",
553 } else if (frag != &q && h.begin) {
554 log_Printf(LogWARN, "Oops - MP frag %lu should have an end flag\n",
557 * Stuff our fragment back at the front of the queue and zap
558 * our half-assembled packet.
560 (*frag)->m_nextpkt = mp->inbufs;
566 h.end = 0; /* just in case it's a whole packet */
568 (*frag)->m_offset += len;
569 (*frag)->m_len -= len;
570 (*frag)->m_nextpkt = NULL;
572 frag = &(*frag)->m_next;
573 while (*frag != NULL);
579 log_Printf(LogDEBUG, "MP: Reassembled frags %lu-%lu, length %zd\n",
580 (u_long)first, (u_long)h.seq, m_length(q));
581 link_PullPacket(&mp->link, MBUF_CTOP(q), q->m_len, mp->bundle);
585 mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq);
589 /* Look for the next fragment */
590 seq = inc_seq(mp->local_is12bit, seq);
597 /* We still have to find a home for our new fragment */
599 for (q = mp->inbufs; q; last = q, q = q->m_nextpkt) {
600 mp_ReadHeader(mp, q, &h);
601 if (isbefore(mp->local_is12bit, mh.seq, h.seq))
604 /* Our received fragment fits in here */
614 mp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
616 struct physical *p = link2physical(l);
618 if (!bundle->ncp.mp.active)
619 /* Let someone else deal with it ! */
623 log_Printf(LogWARN, "DecodePacket: Can't do MP inside MP !\n");
626 m_settype(bp, MB_MPIN);
627 mp_Assemble(&bundle->ncp.mp, bp, p);
634 mp_Output(struct mp *mp, struct bundle *bundle, struct link *l,
635 struct mbuf *m, u_int32_t begin, u_int32_t end)
639 /* Stuff an MP header on the front of our packet and send it */
641 if (mp->peer_is12bit) {
644 val = (begin << 15) | (end << 14) | (u_int16_t)mp->out.seq;
645 ua_htons(&val, prepend);
646 m = m_prepend(m, prepend, 2, 0);
650 val = (begin << 31) | (end << 30) | (u_int32_t)mp->out.seq;
651 ua_htonl(&val, prepend);
652 m = m_prepend(m, prepend, 4, 0);
654 if (log_IsKept(LogDEBUG))
655 log_Printf(LogDEBUG, "MP[frag %d]: Send %zd bytes on link `%s'\n",
656 mp->out.seq, m_length(m), l->name);
657 mp->out.seq = inc_seq(mp->peer_is12bit, mp->out.seq);
659 if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) {
660 log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name);
664 link_PushPacket(l, m, bundle, LINK_QUEUES(l) - 1, PROTO_MP);
668 mp_FillPhysicalQueues(struct bundle *bundle)
670 struct mp *mp = &bundle->ncp.mp;
671 struct datalink *dl, *fdl;
672 size_t total, add, len;
673 int thislink, nlinks, nopenlinks, sendasip;
674 u_int32_t begin, end;
676 struct link *bestlink;
678 thislink = nlinks = nopenlinks = 0;
679 for (fdl = NULL, dl = bundle->links; dl; dl = dl->next) {
680 /* Include non-open links here as mp->out.link will stay more correct */
682 if (thislink == mp->out.link)
688 if (dl->state == DATALINK_OPEN)
700 for (dl = fdl; nlinks > 0; dl = dl->next, nlinks--, thislink++) {
706 if (dl->state != DATALINK_OPEN)
709 if (dl->physical->out)
710 /* this link has suffered a short write. Let it continue */
713 add = link_QueueLen(&dl->physical->link);
715 /* this link has got stuff already queued. Let it continue */
720 if (!mp_QueueLen(mp)) {
724 * If there's only a single open link in our bundle and we haven't got
725 * MP level link compression, queue outbound traffic directly via that
726 * link's protocol stack rather than using the MP link. This results
727 * in the outbound traffic going out as PROTO_IP or PROTO_IPV6 rather
732 sendasip = nopenlinks < 2;
734 if (dl->physical->link.lcp.his_mru < mp->peer_mrru) {
736 * Actually, forget it. This test is done against the MRRU rather
737 * than the packet size so that we don't end up sending some data
738 * in MP fragments and some data in PROTO_IP packets. That's just
739 * too likely to upset some ppp implementations.
746 bestlink = sendasip ? &dl->physical->link : &mp->link;
747 if (!ncp_PushPacket(&bundle->ncp, &mp->out.af, bestlink))
748 break; /* Nothing else to send */
751 log_Printf(LogDEBUG, "Don't send data as PROTO_IP, MRU < MRRU\n");
753 log_Printf(LogDEBUG, "Sending data as PROTO_IP, not PROTO_MP\n");
756 add = link_QueueLen(&dl->physical->link);
758 /* this link has got stuff already queued. Let it continue */
765 m = link_Dequeue(&mp->link);
772 if (dl->state == DATALINK_OPEN) {
773 /* Write at most his_mru bytes to the physical link */
774 if (len <= dl->physical->link.lcp.his_mru) {
777 m_settype(mo, MB_MPOUT);
779 /* It's > his_mru, chop the packet (`m') into bits */
780 mo = m_get(dl->physical->link.lcp.his_mru, MB_MPOUT);
782 m = mbuf_Read(m, MBUF_CTOP(mo), mo->m_len);
784 mp_Output(mp, bundle, &dl->physical->link, mo, begin, end);
800 mp->out.link = thislink; /* Start here next time */
806 mp_SetDatalinkBandwidth(struct cmdargs const *arg)
810 if (arg->argc != arg->argn+1)
813 val = atoi(arg->argv[arg->argn]);
815 log_Printf(LogWARN, "The link bandwidth must be greater than zero\n");
818 arg->cx->mp.bandwidth = val;
820 if (arg->cx->state == DATALINK_OPEN)
821 bundle_CalculateBandwidth(arg->bundle);
827 mp_ShowStatus(struct cmdargs const *arg)
829 struct mp *mp = &arg->bundle->ncp.mp;
831 prompt_Printf(arg->prompt, "Multilink is %sactive\n", mp->active ? "" : "in");
837 prompt_Printf(arg->prompt, "Socket: %s\n",
838 mp->server.socket.sun_path);
839 for (m = mp->inbufs; m; m = m->m_nextpkt) {
843 prompt_Printf(arg->prompt, "Pending frags: %d", bufs);
846 unsigned long first, last;
848 first = mp_ReadHeader(mp, mp->inbufs, &mh) ? mh.seq : 0;
849 last = mp_ReadHeader(mp, lm, &mh) ? mh.seq : 0;
850 prompt_Printf(arg->prompt, " (Have %lu - %lu, want %lu, lowest %lu)\n",
851 first, last, (unsigned long)mp->seq.next_in,
852 (unsigned long)mp->seq.min_in);
853 prompt_Printf(arg->prompt, " First has %sbegin bit and "
854 "%send bit", mh.begin ? "" : "no ", mh.end ? "" : "no ");
856 prompt_Printf(arg->prompt, "\n");
859 prompt_Printf(arg->prompt, "\nMy Side:\n");
861 prompt_Printf(arg->prompt, " Output SEQ: %u\n", mp->out.seq);
862 prompt_Printf(arg->prompt, " MRRU: %u\n", mp->local_mrru);
863 prompt_Printf(arg->prompt, " Short Seq: %s\n",
864 mp->local_is12bit ? "on" : "off");
866 prompt_Printf(arg->prompt, " Discriminator: %s\n",
867 mp_Enddisc(mp->cfg.enddisc.class, mp->cfg.enddisc.address,
868 mp->cfg.enddisc.len));
870 prompt_Printf(arg->prompt, "\nHis Side:\n");
872 prompt_Printf(arg->prompt, " Auth Name: %s\n", mp->peer.authname);
873 prompt_Printf(arg->prompt, " Input SEQ: %u\n", mp->seq.next_in);
874 prompt_Printf(arg->prompt, " MRRU: %u\n", mp->peer_mrru);
875 prompt_Printf(arg->prompt, " Short Seq: %s\n",
876 mp->peer_is12bit ? "on" : "off");
878 prompt_Printf(arg->prompt, " Discriminator: %s\n",
879 mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address,
880 mp->peer.enddisc.len));
882 prompt_Printf(arg->prompt, "\nDefaults:\n");
884 prompt_Printf(arg->prompt, " MRRU: ");
886 prompt_Printf(arg->prompt, "%d (multilink enabled)\n", mp->cfg.mrru);
888 prompt_Printf(arg->prompt, "disabled\n");
889 prompt_Printf(arg->prompt, " Short Seq: %s\n",
890 command_ShowNegval(mp->cfg.shortseq));
891 prompt_Printf(arg->prompt, " Discriminator: %s\n",
892 command_ShowNegval(mp->cfg.negenddisc));
893 prompt_Printf(arg->prompt, " AutoLoad: min %d%%, max %d%%,"
894 " period %d secs\n", mp->cfg.autoload.min,
895 mp->cfg.autoload.max, mp->cfg.autoload.period);
901 mp_Enddisc(u_char c, const char *address, size_t len)
903 static char result[100]; /* Used immediately after it's returned */
908 sprintf(result, "Null Class");
912 snprintf(result, sizeof result, "Local Addr: %.*s", (int)len,
918 snprintf(result, sizeof result, "IP %s",
919 inet_ntoa(*(const struct in_addr *)address));
921 sprintf(result, "IP[%zd] ???", len);
926 const u_char *m = (const u_char *)address;
927 snprintf(result, sizeof result, "MAC %02x:%02x:%02x:%02x:%02x:%02x",
928 m[0], m[1], m[2], m[3], m[4], m[5]);
930 sprintf(result, "MAC[%zd] ???", len);
934 sprintf(result, "Magic: 0x");
935 header = strlen(result);
936 if (len + header + 1 > sizeof result)
937 len = sizeof result - header - 1;
938 for (f = 0; f < len; f++)
939 sprintf(result + header + 2 * f, "%02x", address[f]);
943 snprintf(result, sizeof result, "PSN: %.*s", (int)len, address);
947 sprintf(result, "%d: ", (int)c);
948 header = strlen(result);
949 if (len + header + 1 > sizeof result)
950 len = sizeof result - header - 1;
951 for (f = 0; f < len; f++)
952 sprintf(result + header + 2 * f, "%02x", address[f]);
959 mp_SetEnddisc(struct cmdargs const *arg)
961 struct mp *mp = &arg->bundle->ncp.mp;
964 switch (bundle_Phase(arg->bundle)) {
967 case PHASE_ESTABLISH:
968 /* Make sure none of our links are DATALINK_LCP or greater */
969 if (bundle_HighestState(arg->bundle) >= DATALINK_LCP) {
970 log_Printf(LogWARN, "enddisc: Only changeable before"
971 " LCP negotiations\n");
976 log_Printf(LogWARN, "enddisc: Only changeable at phase DEAD/ESTABLISH\n");
980 if (arg->argc == arg->argn) {
981 mp->cfg.enddisc.class = 0;
982 *mp->cfg.enddisc.address = '\0';
983 mp->cfg.enddisc.len = 0;
984 } else if (arg->argc > arg->argn) {
985 if (!strcasecmp(arg->argv[arg->argn], "label")) {
986 mp->cfg.enddisc.class = ENDDISC_LOCAL;
987 strcpy(mp->cfg.enddisc.address, arg->bundle->cfg.label);
988 mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address);
989 } else if (!strcasecmp(arg->argv[arg->argn], "ip")) {
990 if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY)
991 ncprange_getip4addr(&arg->bundle->ncp.ipcp.cfg.my_range, &addr);
993 addr = arg->bundle->ncp.ipcp.my_ip;
994 memcpy(mp->cfg.enddisc.address, &addr.s_addr, sizeof addr.s_addr);
995 mp->cfg.enddisc.class = ENDDISC_IP;
996 mp->cfg.enddisc.len = sizeof arg->bundle->ncp.ipcp.my_ip.s_addr;
997 } else if (!strcasecmp(arg->argv[arg->argn], "mac")) {
998 struct sockaddr_dl hwaddr;
1000 if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY)
1001 ncprange_getip4addr(&arg->bundle->ncp.ipcp.cfg.my_range, &addr);
1003 addr = arg->bundle->ncp.ipcp.my_ip;
1005 if (arp_EtherAddr(addr, &hwaddr, 1)) {
1006 mp->cfg.enddisc.class = ENDDISC_MAC;
1007 memcpy(mp->cfg.enddisc.address, hwaddr.sdl_data + hwaddr.sdl_nlen,
1009 mp->cfg.enddisc.len = hwaddr.sdl_alen;
1011 log_Printf(LogWARN, "set enddisc: Can't locate MAC address for %s\n",
1015 } else if (!strcasecmp(arg->argv[arg->argn], "magic")) {
1019 for (f = 0; f < 20; f += sizeof(long))
1020 *(long *)(mp->cfg.enddisc.address + f) = random();
1021 mp->cfg.enddisc.class = ENDDISC_MAGIC;
1022 mp->cfg.enddisc.len = 20;
1023 } else if (!strcasecmp(arg->argv[arg->argn], "psn")) {
1024 if (arg->argc > arg->argn+1) {
1025 mp->cfg.enddisc.class = ENDDISC_PSN;
1026 strcpy(mp->cfg.enddisc.address, arg->argv[arg->argn+1]);
1027 mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address);
1029 log_Printf(LogWARN, "PSN endpoint requires additional data\n");
1033 log_Printf(LogWARN, "%s: Unrecognised endpoint type\n",
1034 arg->argv[arg->argn]);
1043 mpserver_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
1046 struct mpserver *s = descriptor2mpserver(d);
1050 if (s->send.dl != NULL) {
1051 /* We've connect()ed */
1052 if (!link_QueueLen(&s->send.dl->physical->link) &&
1053 !s->send.dl->physical->out) {
1054 /* Only send if we've transmitted all our data (i.e. the ConfigAck) */
1055 result -= datalink_RemoveFromSet(s->send.dl, r, w, e);
1056 bundle_SendDatalink(s->send.dl, s->fd, &s->socket);
1060 /* Never read from a datalink that's on death row ! */
1061 result -= datalink_RemoveFromSet(s->send.dl, r, NULL, NULL);
1062 } else if (r && s->fd >= 0) {
1066 log_Printf(LogTIMER, "mp: fdset(r) %d\n", s->fd);
1073 mpserver_IsSet(struct fdescriptor *d, const fd_set *fdset)
1075 struct mpserver *s = descriptor2mpserver(d);
1076 return s->fd >= 0 && FD_ISSET(s->fd, fdset);
1080 mpserver_Read(struct fdescriptor *d, struct bundle *bundle,
1081 const fd_set *fdset __unused)
1083 struct mpserver *s = descriptor2mpserver(d);
1085 bundle_ReceiveDatalink(bundle, s->fd);
1089 mpserver_Write(struct fdescriptor *d __unused, struct bundle *bundle __unused,
1090 const fd_set *fdset __unused)
1092 /* We never want to write here ! */
1093 log_Printf(LogALERT, "mpserver_Write: Internal error: Bad call !\n");
1098 mpserver_Init(struct mpserver *s)
1100 s->desc.type = MPSERVER_DESCRIPTOR;
1101 s->desc.UpdateSet = mpserver_UpdateSet;
1102 s->desc.IsSet = mpserver_IsSet;
1103 s->desc.Read = mpserver_Read;
1104 s->desc.Write = mpserver_Write;
1107 memset(&s->socket, '\0', sizeof s->socket);
1111 mpserver_Open(struct mpserver *s, struct peerid *peer)
1117 log_Printf(LogALERT, "Internal error ! mpserver already open\n");
1121 l = snprintf(s->socket.sun_path, sizeof s->socket.sun_path, "%sppp-%s-%02x-",
1122 _PATH_VARRUN, peer->authname, peer->enddisc.class);
1124 log_Printf(LogERROR, "mpserver: snprintf(): %s\n", strerror(errno));
1125 return MPSERVER_FAILED;
1129 f < peer->enddisc.len && (size_t)l < sizeof s->socket.sun_path - 2;
1131 snprintf(s->socket.sun_path + l, sizeof s->socket.sun_path - l,
1132 "%02x", *(u_char *)(peer->enddisc.address+f));
1136 s->socket.sun_family = AF_LOCAL;
1137 s->socket.sun_len = sizeof s->socket;
1138 s->fd = ID0socket(PF_LOCAL, SOCK_DGRAM, 0);
1140 log_Printf(LogERROR, "mpserver: socket(): %s\n", strerror(errno));
1141 return MPSERVER_FAILED;
1144 setsockopt(s->fd, SOL_SOCKET, SO_REUSEADDR, (struct sockaddr *)&s->socket,
1149 * Try to bind the socket. If we succeed we play server, if we fail
1150 * we connect() and hand the link off.
1153 if (ID0bind_un(s->fd, &s->socket) < 0) {
1154 if (errno != EADDRINUSE) {
1155 log_Printf(LogPHASE, "mpserver: can't create bundle socket %s (%s)\n",
1156 s->socket.sun_path, strerror(errno));
1160 return MPSERVER_FAILED;
1163 /* So we're the sender */
1165 if (ID0connect_un(s->fd, &s->socket) < 0) {
1166 log_Printf(LogPHASE, "mpserver: can't connect to bundle socket %s (%s)\n",
1167 s->socket.sun_path, strerror(errno));
1168 if (errno == ECONNREFUSED)
1169 log_Printf(LogPHASE, " The previous server died badly !\n");
1172 return MPSERVER_FAILED;
1175 /* Donate our link to the other guy */
1176 return MPSERVER_CONNECTED;
1179 return MPSERVER_LISTENING;
1183 mpserver_Close(struct mpserver *s)
1185 if (s->send.dl != NULL) {
1186 bundle_SendDatalink(s->send.dl, s->fd, &s->socket);
1189 } else if (s->fd >= 0) {
1191 if (ID0unlink(s->socket.sun_path) == -1)
1192 log_Printf(LogERROR, "%s: Failed to remove: %s\n", s->socket.sun_path,
1194 memset(&s->socket, '\0', sizeof s->socket);
1200 mp_LinkLost(struct mp *mp, struct datalink *dl)
1202 if (mp->seq.min_in == dl->mp.seq)
1203 /* We've lost the link that's holding everything up ! */
1204 mp_Assemble(mp, NULL, NULL);
1208 mp_QueueLen(struct mp *mp)
1210 return link_QueueLen(&mp->link);