2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/param.h>
30 #include <netinet/in.h>
31 #include <netinet/in_systm.h>
32 #include <netinet/ip.h>
33 #include <arpa/inet.h>
34 #include <net/if_dl.h>
35 #include <sys/socket.h>
60 #include "throughput.h"
61 #include "slcompress.h"
70 #include "descriptor.h"
89 peerid_Init(struct peerid *peer)
91 peer->enddisc.class = 0;
92 *peer->enddisc.address = '\0';
93 peer->enddisc.len = 0;
94 *peer->authname = '\0';
98 peerid_Equal(const struct peerid *p1, const struct peerid *p2)
100 return !strcmp(p1->authname, p2->authname) &&
101 p1->enddisc.class == p2->enddisc.class &&
102 p1->enddisc.len == p2->enddisc.len &&
103 !memcmp(p1->enddisc.address, p2->enddisc.address, p1->enddisc.len);
107 inc_seq(unsigned is12bit, u_int32_t seq)
111 if (seq & 0xfffff000)
113 } else if (seq & 0xff000000)
119 isbefore(unsigned is12bit, u_int32_t seq1, u_int32_t seq2)
121 u_int32_t max = (is12bit ? 0xfff : 0xffffff) - 0x200;
124 if (seq2 < 0x200 || seq2 > seq1)
126 } else if ((seq1 > 0x200 || seq2 <= max) && seq1 < seq2)
133 mp_ReadHeader(struct mp *mp, struct mbuf *m, struct mp_header *header)
135 if (mp->local_is12bit) {
138 ua_ntohs(MBUF_CTOP(m), &val);
140 log_Printf(LogWARN, "Oops - MP header without required zero bits\n");
143 header->begin = val & 0x8000 ? 1 : 0;
144 header->end = val & 0x4000 ? 1 : 0;
145 header->seq = val & 0x0fff;
148 ua_ntohl(MBUF_CTOP(m), &header->seq);
149 if (header->seq & 0x3f000000) {
150 log_Printf(LogWARN, "Oops - MP header without required zero bits\n");
153 header->begin = header->seq & 0x80000000 ? 1 : 0;
154 header->end = header->seq & 0x40000000 ? 1 : 0;
155 header->seq &= 0x00ffffff;
161 mp_LayerStart(void *v, struct fsm *fp)
163 /* The given FSM (ccp) is about to start up ! */
167 mp_LayerUp(void *v, struct fsm *fp)
169 /* The given fsm (ccp) is now up */
171 bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */
175 mp_LayerDown(void *v, struct fsm *fp)
177 /* The given FSM (ccp) has been told to come down */
181 mp_LayerFinish(void *v, struct fsm *fp)
183 /* The given fsm (ccp) is now down */
184 if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
185 fsm_Open(fp); /* CCP goes to ST_STOPPED */
191 struct mp *mp = (struct mp *)v;
194 percent = MAX(mp->link.stats.total.in.OctetsPerSecond,
195 mp->link.stats.total.out.OctetsPerSecond) * 800 /
196 mp->bundle->bandwidth;
197 if (percent >= mp->cfg.autoload.max) {
198 log_Printf(LogDEBUG, "%d%% saturation - bring a link up ?\n", percent);
199 bundle_AutoAdjust(mp->bundle, percent, AUTO_UP);
200 } else if (percent <= mp->cfg.autoload.min) {
201 log_Printf(LogDEBUG, "%d%% saturation - bring a link down ?\n", percent);
202 bundle_AutoAdjust(mp->bundle, percent, AUTO_DOWN);
207 mp_StopAutoloadTimer(struct mp *mp)
209 throughput_stop(&mp->link.stats.total);
213 mp_CheckAutoloadTimer(struct mp *mp)
215 if (mp->link.stats.total.SamplePeriod != mp->cfg.autoload.period) {
216 throughput_destroy(&mp->link.stats.total);
217 throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
218 throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
221 if (bundle_WantAutoloadTimer(mp->bundle))
222 throughput_start(&mp->link.stats.total, "MP throughput", 1);
224 mp_StopAutoloadTimer(mp);
228 mp_RestartAutoloadTimer(struct mp *mp)
230 if (mp->link.stats.total.SamplePeriod != mp->cfg.autoload.period)
231 mp_CheckAutoloadTimer(mp);
233 throughput_clear(&mp->link.stats.total, THROUGHPUT_OVERALL, NULL);
237 mp_Init(struct mp *mp, struct bundle *bundle)
239 mp->peer_is12bit = mp->local_is12bit = 0;
240 mp->peer_mrru = mp->local_mrru = 0;
242 peerid_Init(&mp->peer);
251 mp->link.type = LOGICAL_LINK;
252 mp->link.name = "mp";
253 mp->link.len = sizeof *mp;
255 mp->cfg.autoload.period = SAMPLE_PERIOD;
256 mp->cfg.autoload.min = mp->cfg.autoload.max = 0;
257 throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
258 throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
259 mp->link.stats.parent = NULL;
260 mp->link.stats.gather = 0; /* Let the physical links gather stats */
261 memset(mp->link.Queue, '\0', sizeof mp->link.Queue);
262 memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in);
263 memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out);
265 mp->fsmp.LayerStart = mp_LayerStart;
266 mp->fsmp.LayerUp = mp_LayerUp;
267 mp->fsmp.LayerDown = mp_LayerDown;
268 mp->fsmp.LayerFinish = mp_LayerFinish;
269 mp->fsmp.object = mp;
271 mpserver_Init(&mp->server);
274 mp->cfg.shortseq = NEG_ENABLED|NEG_ACCEPTED;
275 mp->cfg.negenddisc = NEG_ENABLED|NEG_ACCEPTED;
276 mp->cfg.enddisc.class = 0;
277 *mp->cfg.enddisc.address = '\0';
278 mp->cfg.enddisc.len = 0;
280 lcp_Init(&mp->link.lcp, mp->bundle, &mp->link, NULL);
281 ccp_Init(&mp->link.ccp, mp->bundle, &mp->link, &mp->fsmp);
283 link_EmptyStack(&mp->link);
284 link_Stack(&mp->link, &protolayer);
285 link_Stack(&mp->link, &ccplayer);
286 link_Stack(&mp->link, &vjlayer);
288 link_Stack(&mp->link, &natlayer);
293 mp_Up(struct mp *mp, struct datalink *dl)
295 struct lcp *lcp = &dl->physical->link.lcp;
298 /* We're adding a link - do a last validation on our parameters */
299 if (!peerid_Equal(&dl->peer, &mp->peer)) {
300 log_Printf(LogPHASE, "%s: Inappropriate peer !\n", dl->name);
301 log_Printf(LogPHASE, " Attached to peer %s/%s\n", mp->peer.authname,
302 mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address,
303 mp->peer.enddisc.len));
304 log_Printf(LogPHASE, " New link is peer %s/%s\n", dl->peer.authname,
305 mp_Enddisc(dl->peer.enddisc.class, dl->peer.enddisc.address,
306 dl->peer.enddisc.len));
309 if (mp->local_mrru != lcp->want_mrru ||
310 mp->peer_mrru != lcp->his_mrru ||
311 mp->local_is12bit != lcp->want_shortseq ||
312 mp->peer_is12bit != lcp->his_shortseq) {
313 log_Printf(LogPHASE, "%s: Invalid MRRU/SHORTSEQ MP parameters !\n",
319 /* First link in multilink mode */
321 mp->local_mrru = lcp->want_mrru;
322 mp->peer_mrru = lcp->his_mrru;
323 mp->local_is12bit = lcp->want_shortseq;
324 mp->peer_is12bit = lcp->his_shortseq;
327 throughput_destroy(&mp->link.stats.total);
328 throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
329 throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
330 memset(mp->link.Queue, '\0', sizeof mp->link.Queue);
331 memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in);
332 memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out);
334 /* Tell the link who it belongs to */
335 dl->physical->link.stats.parent = &mp->link.stats.total;
343 * Now we create our server socket.
344 * If it already exists, join it. Otherwise, create and own it
346 switch (mpserver_Open(&mp->server, &mp->peer)) {
347 case MPSERVER_CONNECTED:
348 log_Printf(LogPHASE, "mp: Transfer link on %s\n",
349 mp->server.socket.sun_path);
350 mp->server.send.dl = dl; /* Defer 'till it's safe to send */
352 case MPSERVER_FAILED:
354 case MPSERVER_LISTENING:
355 log_Printf(LogPHASE, "mp: Listening on %s\n", mp->server.socket.sun_path);
356 log_Printf(LogPHASE, " First link: %s\n", dl->name);
358 /* Re-point our IPCP layer at our MP link */
359 ipcp_SetLink(&mp->bundle->ncp.ipcp, &mp->link);
361 /* Our lcp's already up 'cos of the NULL parent */
362 if (ccp_SetOpenMode(&mp->link.ccp)) {
363 fsm_Up(&mp->link.ccp.fsm);
364 fsm_Open(&mp->link.ccp.fsm);
376 mp_Down(struct mp *mp)
382 mp_StopAutoloadTimer(mp);
384 /* Don't want any more of these */
385 mpserver_Close(&mp->server);
387 /* CCP goes down with a bang */
388 fsm2initial(&mp->link.ccp.fsm);
390 /* Received fragments go in the bit-bucket */
392 next = mp->inbufs->m_nextpkt;
397 peerid_Init(&mp->peer);
403 mp_linkInit(struct mp_link *mplink)
406 mplink->bandwidth = 0;
410 mp_Assemble(struct mp *mp, struct mbuf *m, struct physical *p)
412 struct mp_header mh, h;
413 struct mbuf *q, *last;
417 * When `m' and `p' are NULL, it means our oldest link has gone down.
418 * We want to determine a new min, and process any intermediate stuff
422 if (m && mp_ReadHeader(mp, m, &mh) == 0) {
429 p->dl->mp.seq = mh.seq;
431 seq = mp->seq.min_in;
433 if (mp->seq.min_in == seq) {
435 * We've received new data on the link that has our min (oldest) seq.
436 * Figure out which link now has the smallest (oldest) seq.
440 mp->seq.min_in = (u_int32_t)-1;
441 for (dl = mp->bundle->links; dl; dl = dl->next)
442 if (dl->state == DATALINK_OPEN &&
443 (mp->seq.min_in == -1 ||
444 isbefore(mp->local_is12bit, dl->mp.seq, mp->seq.min_in)))
445 mp->seq.min_in = dl->mp.seq;
449 * Now process as many of our fragments as we can, adding our new
450 * fragment in as we go, and ordering with the oldest at the top of
455 seq = mp->seq.next_in;
467 mp_ReadHeader(mp, q, &h);
469 if (m && isbefore(mp->local_is12bit, mh.seq, h.seq)) {
470 /* Our received fragment fits in before this one, so link it in */
483 /* we're missing something :-( */
484 if (isbefore(mp->local_is12bit, seq, mp->seq.min_in)) {
485 /* we're never gonna get it */
488 /* Zap all older fragments */
489 while (mp->inbufs != q) {
490 log_Printf(LogDEBUG, "Drop frag\n");
491 next = mp->inbufs->m_nextpkt;
497 * Zap everything until the next `end' fragment OR just before
498 * the next `begin' fragment OR 'till seq.min_in - whichever
502 mp_ReadHeader(mp, mp->inbufs, &h);
504 /* We might be able to process this ! */
505 h.seq--; /* We're gonna look for fragment with h.seq+1 */
508 next = mp->inbufs->m_nextpkt;
509 log_Printf(LogDEBUG, "Drop frag %u\n", h.seq);
512 } while (mp->inbufs && (isbefore(mp->local_is12bit, mp->seq.min_in,
516 * Continue processing things from here.
517 * This deals with the possibility that we received a fragment
518 * on the slowest link that invalidates some of our data (because
519 * of the hole at `q'), but where there are subsequent `whole'
520 * packets that have already been received.
523 mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq);
527 /* we may still receive the missing fragment */
530 /* We've got something, reassemble */
531 struct mbuf **frag = &q;
537 mp->inbufs = mp->inbufs->m_nextpkt;
538 len = mp_ReadHeader(mp, *frag, &h);
541 (*frag)->m_offset += len;
542 (*frag)->m_len -= len;
543 (*frag)->m_nextpkt = NULL;
544 if (frag == &q && !h.begin) {
545 log_Printf(LogWARN, "Oops - MP frag %lu should have a begin flag\n",
549 } else if (frag != &q && h.begin) {
550 log_Printf(LogWARN, "Oops - MP frag %lu should have an end flag\n",
553 * Stuff our fragment back at the front of the queue and zap
554 * our half-assembed packet.
556 (*frag)->m_nextpkt = mp->inbufs;
562 h.end = 0; /* just in case it's a whole packet */
565 frag = &(*frag)->m_next;
566 while (*frag != NULL);
571 log_Printf(LogDEBUG, "MP: Reassembled frags %ld-%lu, length %d\n",
572 first, (u_long)h.seq, m_length(q));
573 link_PullPacket(&mp->link, MBUF_CTOP(q), q->m_len, mp->bundle);
577 mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq);
581 /* Look for the next fragment */
582 seq = inc_seq(mp->local_is12bit, seq);
589 /* We still have to find a home for our new fragment */
591 for (q = mp->inbufs; q; last = q, q = q->m_nextpkt) {
592 mp_ReadHeader(mp, q, &h);
593 if (isbefore(mp->local_is12bit, mh.seq, h.seq))
596 /* Our received fragment fits in here */
606 mp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
608 struct physical *p = link2physical(l);
610 if (!bundle->ncp.mp.active)
611 /* Let someone else deal with it ! */
615 log_Printf(LogWARN, "DecodePacket: Can't do MP inside MP !\n");
618 m_settype(bp, MB_MPIN);
619 mp_Assemble(&bundle->ncp.mp, bp, p);
626 mp_Output(struct mp *mp, struct bundle *bundle, struct link *l,
627 struct mbuf *m, u_int32_t begin, u_int32_t end)
631 /* Stuff an MP header on the front of our packet and send it */
633 if (mp->peer_is12bit) {
636 val = (begin << 15) | (end << 14) | (u_int16_t)mp->out.seq;
637 ua_htons(&val, prepend);
638 m = m_prepend(m, prepend, 2, 0);
642 val = (begin << 31) | (end << 30) | (u_int32_t)mp->out.seq;
643 ua_htonl(&val, prepend);
644 m = m_prepend(m, prepend, 4, 0);
646 if (log_IsKept(LogDEBUG))
647 log_Printf(LogDEBUG, "MP[frag %d]: Send %d bytes on link `%s'\n",
648 mp->out.seq, m_length(m), l->name);
649 mp->out.seq = inc_seq(mp->peer_is12bit, mp->out.seq);
651 if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) {
652 log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name);
656 link_PushPacket(l, m, bundle, LINK_QUEUES(l) - 1, PROTO_MP);
660 mp_FillQueues(struct bundle *bundle)
662 struct mp *mp = &bundle->ncp.mp;
663 struct datalink *dl, *fdl;
664 size_t total, add, len;
665 int thislink, nlinks;
666 u_int32_t begin, end;
669 thislink = nlinks = 0;
670 for (fdl = NULL, dl = bundle->links; dl; dl = dl->next) {
671 /* Include non-open links here as mp->out.link will stay more correct */
673 if (thislink == mp->out.link)
689 for (dl = fdl; nlinks > 0; dl = dl->next, nlinks--, thislink++) {
695 if (dl->state != DATALINK_OPEN)
698 if (dl->physical->out)
699 /* this link has suffered a short write. Let it continue */
702 add = link_QueueLen(&dl->physical->link);
704 /* this link has got stuff already queued. Let it continue */
709 if (!link_QueueLen(&mp->link)) {
710 struct datalink *other;
714 * If there's only a single open link in our bundle and we haven't got
715 * MP level link compression, queue outbound traffic directly via that
716 * link's protocol stack rather than using the MP link. This results
717 * in the outbound traffic going out as PROTO_IP rather than PROTO_MP.
719 for (other = dl->next; other; other = other->next)
720 if (other->state == DATALINK_OPEN)
725 if (dl->physical->link.lcp.his_mru < mp->peer_mrru) {
727 * Actually, forget it. This test is done against the MRRU rather
728 * than the packet size so that we don't end up sending some data
729 * in MP fragments and some data in PROTO_IP packets. That's just
730 * too likely to upset some ppp implementations.
737 if (!ip_PushPacket(other ? &mp->link : &dl->physical->link, bundle))
738 /* Nothing else to send */
742 log_Printf(LogDEBUG, "Don't send data as PROTO_IP, MRU < MRRU\n");
744 log_Printf(LogDEBUG, "Sending data as PROTO_IP, not PROTO_MP\n");
747 add = link_QueueLen(&dl->physical->link);
749 /* this link has got stuff already queued. Let it continue */
756 m = link_Dequeue(&mp->link);
763 if (dl->state == DATALINK_OPEN) {
764 /* Write at most his_mru bytes to the physical link */
765 if (len <= dl->physical->link.lcp.his_mru) {
768 m_settype(mo, MB_MPOUT);
770 /* It's > his_mru, chop the packet (`m') into bits */
771 mo = m_get(dl->physical->link.lcp.his_mru, MB_MPOUT);
773 m = mbuf_Read(m, MBUF_CTOP(mo), mo->m_len);
775 mp_Output(mp, bundle, &dl->physical->link, mo, begin, end);
791 mp->out.link = thislink; /* Start here next time */
797 mp_SetDatalinkBandwidth(struct cmdargs const *arg)
801 if (arg->argc != arg->argn+1)
804 val = atoi(arg->argv[arg->argn]);
806 log_Printf(LogWARN, "The link bandwidth must be greater than zero\n");
809 arg->cx->mp.bandwidth = val;
811 if (arg->cx->state == DATALINK_OPEN)
812 bundle_CalculateBandwidth(arg->bundle);
818 mp_ShowStatus(struct cmdargs const *arg)
820 struct mp *mp = &arg->bundle->ncp.mp;
822 prompt_Printf(arg->prompt, "Multilink is %sactive\n", mp->active ? "" : "in");
828 prompt_Printf(arg->prompt, "Socket: %s\n",
829 mp->server.socket.sun_path);
830 for (m = mp->inbufs; m; m = m->m_nextpkt) {
834 prompt_Printf(arg->prompt, "Pending frags: %d", bufs);
837 unsigned long first, last;
839 first = mp_ReadHeader(mp, mp->inbufs, &mh) ? mh.seq : 0;
840 last = mp_ReadHeader(mp, lm, &mh) ? mh.seq : 0;
841 prompt_Printf(arg->prompt, " (Have %lu - %lu, want %lu, lowest %lu)\n",
842 first, last, (unsigned long)mp->seq.next_in,
843 (unsigned long)mp->seq.min_in);
844 prompt_Printf(arg->prompt, " First has %sbegin bit and "
845 "%send bit", mh.begin ? "" : "no ", mh.end ? "" : "no ");
847 prompt_Printf(arg->prompt, "\n");
850 prompt_Printf(arg->prompt, "\nMy Side:\n");
852 prompt_Printf(arg->prompt, " Output SEQ: %u\n", mp->out.seq);
853 prompt_Printf(arg->prompt, " MRRU: %u\n", mp->local_mrru);
854 prompt_Printf(arg->prompt, " Short Seq: %s\n",
855 mp->local_is12bit ? "on" : "off");
857 prompt_Printf(arg->prompt, " Discriminator: %s\n",
858 mp_Enddisc(mp->cfg.enddisc.class, mp->cfg.enddisc.address,
859 mp->cfg.enddisc.len));
861 prompt_Printf(arg->prompt, "\nHis Side:\n");
863 prompt_Printf(arg->prompt, " Auth Name: %s\n", mp->peer.authname);
864 prompt_Printf(arg->prompt, " Input SEQ: %u\n", mp->seq.next_in);
865 prompt_Printf(arg->prompt, " MRRU: %u\n", mp->peer_mrru);
866 prompt_Printf(arg->prompt, " Short Seq: %s\n",
867 mp->peer_is12bit ? "on" : "off");
869 prompt_Printf(arg->prompt, " Discriminator: %s\n",
870 mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address,
871 mp->peer.enddisc.len));
873 prompt_Printf(arg->prompt, "\nDefaults:\n");
875 prompt_Printf(arg->prompt, " MRRU: ");
877 prompt_Printf(arg->prompt, "%d (multilink enabled)\n", mp->cfg.mrru);
879 prompt_Printf(arg->prompt, "disabled\n");
880 prompt_Printf(arg->prompt, " Short Seq: %s\n",
881 command_ShowNegval(mp->cfg.shortseq));
882 prompt_Printf(arg->prompt, " Discriminator: %s\n",
883 command_ShowNegval(mp->cfg.negenddisc));
884 prompt_Printf(arg->prompt, " AutoLoad: min %d%%, max %d%%,"
885 " period %d secs\n", mp->cfg.autoload.min,
886 mp->cfg.autoload.max, mp->cfg.autoload.period);
892 mp_Enddisc(u_char c, const char *address, int len)
894 static char result[100]; /* Used immediately after it's returned */
899 sprintf(result, "Null Class");
903 snprintf(result, sizeof result, "Local Addr: %.*s", len, address);
908 snprintf(result, sizeof result, "IP %s",
909 inet_ntoa(*(const struct in_addr *)address));
911 sprintf(result, "IP[%d] ???", len);
916 const u_char *m = (const u_char *)address;
917 snprintf(result, sizeof result, "MAC %02x:%02x:%02x:%02x:%02x:%02x",
918 m[0], m[1], m[2], m[3], m[4], m[5]);
920 sprintf(result, "MAC[%d] ???", len);
924 sprintf(result, "Magic: 0x");
925 header = strlen(result);
926 if (len > sizeof result - header - 1)
927 len = sizeof result - header - 1;
928 for (f = 0; f < len; f++)
929 sprintf(result + header + 2 * f, "%02x", address[f]);
933 snprintf(result, sizeof result, "PSN: %.*s", len, address);
937 sprintf(result, "%d: ", (int)c);
938 header = strlen(result);
939 if (len > sizeof result - header - 1)
940 len = sizeof result - header - 1;
941 for (f = 0; f < len; f++)
942 sprintf(result + header + 2 * f, "%02x", address[f]);
949 mp_SetEnddisc(struct cmdargs const *arg)
951 struct mp *mp = &arg->bundle->ncp.mp;
954 switch (bundle_Phase(arg->bundle)) {
957 case PHASE_ESTABLISH:
958 /* Make sure none of our links are DATALINK_LCP or greater */
959 if (bundle_HighestState(arg->bundle) >= DATALINK_LCP) {
960 log_Printf(LogWARN, "enddisc: Only changable before"
961 " LCP negotiations\n");
966 log_Printf(LogWARN, "enddisc: Only changable at phase DEAD/ESTABLISH\n");
970 if (arg->argc == arg->argn) {
971 mp->cfg.enddisc.class = 0;
972 *mp->cfg.enddisc.address = '\0';
973 mp->cfg.enddisc.len = 0;
974 } else if (arg->argc > arg->argn) {
975 if (!strcasecmp(arg->argv[arg->argn], "label")) {
976 mp->cfg.enddisc.class = ENDDISC_LOCAL;
977 strcpy(mp->cfg.enddisc.address, arg->bundle->cfg.label);
978 mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address);
979 } else if (!strcasecmp(arg->argv[arg->argn], "ip")) {
980 if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY)
981 addr = arg->bundle->ncp.ipcp.cfg.my_range.ipaddr;
983 addr = arg->bundle->ncp.ipcp.my_ip;
984 memcpy(mp->cfg.enddisc.address, &addr.s_addr, sizeof addr.s_addr);
985 mp->cfg.enddisc.class = ENDDISC_IP;
986 mp->cfg.enddisc.len = sizeof arg->bundle->ncp.ipcp.my_ip.s_addr;
987 } else if (!strcasecmp(arg->argv[arg->argn], "mac")) {
988 struct sockaddr_dl hwaddr;
991 if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY)
992 addr = arg->bundle->ncp.ipcp.cfg.my_range.ipaddr;
994 addr = arg->bundle->ncp.ipcp.my_ip;
996 s = ID0socket(AF_INET, SOCK_DGRAM, 0);
998 log_Printf(LogERROR, "set enddisc: socket(): %s\n", strerror(errno));
1001 if (get_ether_addr(s, addr, &hwaddr)) {
1002 mp->cfg.enddisc.class = ENDDISC_MAC;
1003 memcpy(mp->cfg.enddisc.address, hwaddr.sdl_data + hwaddr.sdl_nlen,
1005 mp->cfg.enddisc.len = hwaddr.sdl_alen;
1007 log_Printf(LogWARN, "set enddisc: Can't locate MAC address for %s\n",
1013 } else if (!strcasecmp(arg->argv[arg->argn], "magic")) {
1017 for (f = 0; f < 20; f += sizeof(long))
1018 *(long *)(mp->cfg.enddisc.address + f) = random();
1019 mp->cfg.enddisc.class = ENDDISC_MAGIC;
1020 mp->cfg.enddisc.len = 20;
1021 } else if (!strcasecmp(arg->argv[arg->argn], "psn")) {
1022 if (arg->argc > arg->argn+1) {
1023 mp->cfg.enddisc.class = ENDDISC_PSN;
1024 strcpy(mp->cfg.enddisc.address, arg->argv[arg->argn+1]);
1025 mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address);
1027 log_Printf(LogWARN, "PSN endpoint requires additional data\n");
1031 log_Printf(LogWARN, "%s: Unrecognised endpoint type\n",
1032 arg->argv[arg->argn]);
1041 mpserver_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
1044 struct mpserver *s = descriptor2mpserver(d);
1048 if (s->send.dl != NULL) {
1049 /* We've connect()ed */
1050 if (!link_QueueLen(&s->send.dl->physical->link) &&
1051 !s->send.dl->physical->out) {
1052 /* Only send if we've transmitted all our data (i.e. the ConfigAck) */
1053 result -= datalink_RemoveFromSet(s->send.dl, r, w, e);
1054 bundle_SendDatalink(s->send.dl, s->fd, &s->socket);
1058 /* Never read from a datalink that's on death row ! */
1059 result -= datalink_RemoveFromSet(s->send.dl, r, NULL, NULL);
1060 } else if (r && s->fd >= 0) {
1064 log_Printf(LogTIMER, "mp: fdset(r) %d\n", s->fd);
1071 mpserver_IsSet(struct fdescriptor *d, const fd_set *fdset)
1073 struct mpserver *s = descriptor2mpserver(d);
1074 return s->fd >= 0 && FD_ISSET(s->fd, fdset);
1078 mpserver_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
1080 struct mpserver *s = descriptor2mpserver(d);
1082 bundle_ReceiveDatalink(bundle, s->fd);
1086 mpserver_Write(struct fdescriptor *d, struct bundle *bundle,
1087 const fd_set *fdset)
1089 /* We never want to write here ! */
1090 log_Printf(LogALERT, "mpserver_Write: Internal error: Bad call !\n");
1095 mpserver_Init(struct mpserver *s)
1097 s->desc.type = MPSERVER_DESCRIPTOR;
1098 s->desc.UpdateSet = mpserver_UpdateSet;
1099 s->desc.IsSet = mpserver_IsSet;
1100 s->desc.Read = mpserver_Read;
1101 s->desc.Write = mpserver_Write;
1104 memset(&s->socket, '\0', sizeof s->socket);
1108 mpserver_Open(struct mpserver *s, struct peerid *peer)
1114 log_Printf(LogALERT, "Internal error ! mpserver already open\n");
1118 l = snprintf(s->socket.sun_path, sizeof s->socket.sun_path, "%sppp-%s-%02x-",
1119 _PATH_VARRUN, peer->authname, peer->enddisc.class);
1121 for (f = 0; f < peer->enddisc.len && l < sizeof s->socket.sun_path - 2; f++) {
1122 snprintf(s->socket.sun_path + l, sizeof s->socket.sun_path - l,
1123 "%02x", *(u_char *)(peer->enddisc.address+f));
1127 s->socket.sun_family = AF_LOCAL;
1128 s->socket.sun_len = sizeof s->socket;
1129 s->fd = ID0socket(PF_LOCAL, SOCK_DGRAM, 0);
1131 log_Printf(LogERROR, "mpserver: socket(): %s\n", strerror(errno));
1132 return MPSERVER_FAILED;
1135 setsockopt(s->fd, SOL_SOCKET, SO_REUSEADDR, (struct sockaddr *)&s->socket,
1140 * Try to bind the socket. If we succeed we play server, if we fail
1141 * we connect() and hand the link off.
1144 if (ID0bind_un(s->fd, &s->socket) < 0) {
1145 if (errno != EADDRINUSE) {
1146 log_Printf(LogPHASE, "mpserver: can't create bundle socket %s (%s)\n",
1147 s->socket.sun_path, strerror(errno));
1151 return MPSERVER_FAILED;
1154 /* So we're the sender */
1156 if (ID0connect_un(s->fd, &s->socket) < 0) {
1157 log_Printf(LogPHASE, "mpserver: can't connect to bundle socket %s (%s)\n",
1158 s->socket.sun_path, strerror(errno));
1159 if (errno == ECONNREFUSED)
1160 log_Printf(LogPHASE, " The previous server died badly !\n");
1163 return MPSERVER_FAILED;
1166 /* Donate our link to the other guy */
1167 return MPSERVER_CONNECTED;
1170 return MPSERVER_LISTENING;
1174 mpserver_Close(struct mpserver *s)
1176 if (s->send.dl != NULL) {
1177 bundle_SendDatalink(s->send.dl, s->fd, &s->socket);
1180 } else if (s->fd >= 0) {
1182 if (ID0unlink(s->socket.sun_path) == -1)
1183 log_Printf(LogERROR, "%s: Failed to remove: %s\n", s->socket.sun_path,
1185 memset(&s->socket, '\0', sizeof s->socket);
1191 mp_LinkLost(struct mp *mp, struct datalink *dl)
1193 if (mp->seq.min_in == dl->mp.seq)
1194 /* We've lost the link that's holding everything up ! */
1195 mp_Assemble(mp, NULL, NULL);
1199 mp_DeleteQueue(struct mp *mp)
1201 link_DeleteQueue(&mp->link);