2 * ipcp.c - PPP IP Control Protocol.
4 * Copyright (c) 1989 Carnegie Mellon University.
7 * Redistribution and use in source and binary forms are permitted
8 * provided that the above copyright notice and this paragraph are
9 * duplicated in all such forms and that any documentation,
10 * advertising materials, and other materials related to such
11 * distribution and use acknowledge that the software was developed
12 * by Carnegie Mellon University. The name of the
13 * University may not be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 static char rcsid[] = "$Id: ipcp.c,v 1.6 1994/05/24 05:57:56 paulus Exp $";
31 #include <sys/types.h>
32 #include <sys/socket.h>
35 #include <net/if_ppp.h>
41 #include "pathnames.h"
44 ipcp_options ipcp_wantoptions[NPPP]; /* Options that we want to request */
45 ipcp_options ipcp_gotoptions[NPPP]; /* Options that peer ack'd */
46 ipcp_options ipcp_allowoptions[NPPP]; /* Options we allow peer to request */
47 ipcp_options ipcp_hisoptions[NPPP]; /* Options that we ack'd */
50 extern char devname[];
54 static int cis_received[NPPP]; /* # Conf-Reqs received */
57 * Callbacks for fsm code. (CI = Configuration Information)
59 static void ipcp_resetci __ARGS((fsm *)); /* Reset our CI */
60 static int ipcp_cilen __ARGS((fsm *)); /* Return length of our CI */
61 static void ipcp_addci __ARGS((fsm *, u_char *, int *)); /* Add our CI */
62 static int ipcp_ackci __ARGS((fsm *, u_char *, int)); /* Peer ack'd our CI */
63 static int ipcp_nakci __ARGS((fsm *, u_char *, int)); /* Peer nak'd our CI */
64 static int ipcp_rejci __ARGS((fsm *, u_char *, int)); /* Peer rej'd our CI */
65 static int ipcp_reqci __ARGS((fsm *, u_char *, int *, int)); /* Rcv CI */
66 static void ipcp_up __ARGS((fsm *)); /* We're UP */
67 static void ipcp_down __ARGS((fsm *)); /* We're DOWN */
68 static void ipcp_script __ARGS((fsm *, char *)); /* Run an up/down script */
70 fsm ipcp_fsm[NPPP]; /* IPCP fsm structure */
72 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
73 ipcp_resetci, /* Reset our Configuration Information */
74 ipcp_cilen, /* Length of our Configuration Information */
75 ipcp_addci, /* Add our Configuration Information */
76 ipcp_ackci, /* ACK our Configuration Information */
77 ipcp_nakci, /* NAK our Configuration Information */
78 ipcp_rejci, /* Reject our Configuration Information */
79 ipcp_reqci, /* Request peer's Configuration Information */
80 ipcp_up, /* Called when fsm reaches OPENED state */
81 ipcp_down, /* Called when fsm leaves OPENED state */
82 NULL, /* Called when we want the lower layer up */
83 NULL, /* Called when we want the lower layer down */
84 NULL, /* Called when Protocol-Reject received */
85 NULL, /* Retransmission is necessary */
86 NULL, /* Called to handle protocol-specific codes */
87 "IPCP" /* String name of protocol */
91 * Lengths of configuration options.
94 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
95 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
96 #define CILEN_ADDR 6 /* new-style single address option */
97 #define CILEN_ADDRS 10 /* old-style dual address option */
100 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
101 (x) == CONFNAK ? "NAK" : "REJ")
105 * Make a string representation of a network IP address.
113 ipaddr = ntohl(ipaddr);
115 sprintf(b, "%d.%d.%d.%d",
116 (u_char)(ipaddr >> 24),
117 (u_char)(ipaddr >> 16),
118 (u_char)(ipaddr >> 8),
125 * ipcp_init - Initialize IPCP.
131 fsm *f = &ipcp_fsm[unit];
132 ipcp_options *wo = &ipcp_wantoptions[unit];
133 ipcp_options *ao = &ipcp_allowoptions[unit];
137 f->callbacks = &ipcp_callbacks;
138 fsm_init(&ipcp_fsm[unit]);
147 wo->vj_protocol = IPCP_VJ_COMP;
148 wo->maxslotindex = MAX_STATES - 1; /* really max index */
151 /* max slots and slot-id compression are currently hardwired in */
152 /* ppp_if.c to 16 and 1, this needs to be changed (among other */
157 ao->maxslotindex = MAX_STATES - 1;
163 * ipcp_open - IPCP is allowed to come up.
169 fsm_open(&ipcp_fsm[unit]);
174 * ipcp_close - Take IPCP down.
180 fsm_close(&ipcp_fsm[unit]);
185 * ipcp_lowerup - The lower layer is up.
191 fsm_lowerup(&ipcp_fsm[unit]);
196 * ipcp_lowerdown - The lower layer is down.
202 fsm_lowerdown(&ipcp_fsm[unit]);
207 * ipcp_input - Input IPCP packet.
210 ipcp_input(unit, p, len)
215 fsm_input(&ipcp_fsm[unit], p, len);
220 * ipcp_protrej - A Protocol-Reject was received for IPCP.
222 * Pretend the lower layer went down, so we shut up.
228 fsm_lowerdown(&ipcp_fsm[unit]);
233 * ipcp_resetci - Reset our CI.
239 ipcp_options *wo = &ipcp_wantoptions[f->unit];
241 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
242 if (wo->ouraddr == 0)
243 wo->accept_local = 1;
244 if (wo->hisaddr == 0)
245 wo->accept_remote = 1;
246 ipcp_gotoptions[f->unit] = *wo;
247 cis_received[f->unit] = 0;
252 * ipcp_cilen - Return length of our CI.
258 ipcp_options *go = &ipcp_gotoptions[f->unit];
260 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
261 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
263 return (LENCIADDR(go->neg_addr, go->old_addrs) +
264 LENCIVJ(go->neg_vj, go->old_vj));
269 * ipcp_addci - Add our desired CIs to a packet.
272 ipcp_addci(f, ucp, lenp)
277 ipcp_options *wo = &ipcp_wantoptions[f->unit];
278 ipcp_options *go = &ipcp_gotoptions[f->unit];
279 ipcp_options *ho = &ipcp_hisoptions[f->unit];
282 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
284 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
285 if (len >= vjlen) { \
287 PUTCHAR(vjlen, ucp); \
288 PUTSHORT(val, ucp); \
290 PUTCHAR(maxslotindex, ucp); \
291 PUTCHAR(cflag, ucp); \
298 #define ADDCIADDR(opt, neg, old, val1, val2) \
300 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
301 if (len >= addrlen) { \
304 PUTCHAR(addrlen, ucp); \
317 * First see if we want to change our options to the old
318 * forms because we have received old forms from the peer.
320 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
321 /* use the old style of address negotiation */
325 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
326 /* try an older style of VJ negotiation */
327 if (cis_received[f->unit] == 0) {
328 /* keep trying the new style until we see some CI from the peer */
331 /* use the old style only if the peer did */
332 if (ho->neg_vj && ho->old_vj) {
335 go->vj_protocol = ho->vj_protocol;
340 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
341 go->old_addrs, go->ouraddr, go->hisaddr);
343 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
344 go->maxslotindex, go->cflag);
351 * ipcp_ackci - Ack our CIs.
358 ipcp_ackci(f, p, len)
363 ipcp_options *go = &ipcp_gotoptions[f->unit];
364 u_short cilen, citype, cishort;
366 u_char cimaxslotindex, cicflag;
369 * CIs must be in exactly the same order that we sent...
370 * Check packet length and CI length at each step.
371 * If we find any deviations, then this packet is bad.
374 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
376 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
377 if ((len -= vjlen) < 0) \
379 GETCHAR(citype, p); \
381 if (cilen != vjlen || \
384 GETSHORT(cishort, p); \
385 if (cishort != val) \
388 GETCHAR(cimaxslotindex, p); \
389 if (cimaxslotindex != maxslotindex) \
391 GETCHAR(cicflag, p); \
392 if (cicflag != cflag) \
397 #define ACKCIADDR(opt, neg, old, val1, val2) \
399 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
401 if ((len -= addrlen) < 0) \
403 GETCHAR(citype, p); \
405 if (cilen != addrlen || \
410 if (val1 != cilong) \
415 if (val2 != cilong) \
420 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
421 go->old_addrs, go->ouraddr, go->hisaddr);
423 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
424 go->maxslotindex, go->cflag);
427 * If there are any remaining CIs, then this packet is bad.
434 IPCPDEBUG((LOG_INFO, "ipcp_ackci: received bad Ack!"));
439 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
440 * This should not modify any state if the Nak is bad
441 * or if IPCP is in the OPENED state.
448 ipcp_nakci(f, p, len)
453 ipcp_options *go = &ipcp_gotoptions[f->unit];
454 u_char cimaxslotindex, cicflag;
455 u_char citype, cilen, *next;
457 u_long ciaddr1, ciaddr2, l;
458 ipcp_options no; /* options we've seen Naks for */
459 ipcp_options try; /* options to request next time */
461 BZERO(&no, sizeof(no));
465 * Any Nak'd CIs must be in exactly the same order that we sent.
466 * Check packet length and CI length at each step.
467 * If we find any deviations, then this packet is bad.
469 #define NAKCIADDR(opt, neg, old, code) \
471 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
477 ciaddr1 = htonl(l); \
480 ciaddr2 = htonl(l); \
488 #define NAKCIVJ(opt, neg, code) \
490 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
495 GETSHORT(cishort, p); \
496 if (cilen == CILEN_VJ) { \
497 GETCHAR(cimaxslotindex, p); \
498 GETCHAR(cicflag, p); \
505 * Accept the peer's idea of {our,his} address, if different
506 * from our idea, only if the accept_{local,remote} flag is set.
508 NAKCIADDR(CI_ADDR, neg_addr, go->old_addrs,
509 if (go->accept_local && ciaddr1) { /* Do we know our address? */
510 try.ouraddr = ciaddr1;
511 IPCPDEBUG((LOG_INFO, "local IP address %s",
514 if (go->accept_remote && ciaddr2) { /* Does he know his? */
515 try.hisaddr = ciaddr2;
516 IPCPDEBUG((LOG_INFO, "remote IP address %s",
522 * Accept the peer's value of maxslotindex provided that it
523 * is less than what we asked for. Turn off slot-ID compression
524 * if the peer wants. Send old-style compress-type option if
527 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
528 if (cilen == CILEN_VJ) {
529 if (cishort == IPCP_VJ_COMP) {
531 if (cimaxslotindex < go->maxslotindex)
532 try.maxslotindex = cimaxslotindex;
539 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
541 try.vj_protocol = cishort;
549 * There may be remaining CIs, if the peer is requesting negotiation
550 * on an option that we didn't include in our request packet.
551 * If they want to negotiate about IP addresses, we comply.
552 * If they want us to ask for compression, we refuse.
554 while (len > CILEN_VOID) {
557 if( (len -= cilen) < 0 )
559 next = p + cilen - 2;
562 case CI_COMPRESSTYPE:
563 if (go->neg_vj || no.neg_vj ||
564 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS))
569 if (go->neg_addr && go->old_addrs || no.old_addrs
570 || cilen != CILEN_ADDRS)
576 if (ciaddr1 && go->accept_local)
577 try.ouraddr = ciaddr1;
580 if (ciaddr2 && go->accept_remote)
581 try.hisaddr = ciaddr2;
585 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR)
591 if (ciaddr1 && go->accept_local)
592 try.ouraddr = ciaddr1;
601 /* If there is still anything left, this packet is bad. */
606 * OK, the Nak is good. Now we can update state.
608 if (f->state != OPENED)
614 IPCPDEBUG((LOG_INFO, "ipcp_nakci: received bad Nak!"));
620 * ipcp_rejci - Reject some of our CIs.
623 ipcp_rejci(f, p, len)
628 ipcp_options *go = &ipcp_gotoptions[f->unit];
629 u_char cimaxslotindex, ciflag, cilen;
632 ipcp_options try; /* options to request next time */
636 * Any Rejected CIs must be in exactly the same order that we sent.
637 * Check packet length and CI length at each step.
638 * If we find any deviations, then this packet is bad.
640 #define REJCIADDR(opt, neg, old, val1, val2) \
642 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
650 /* Check rejected value. */ \
651 if (cilong != val1) \
656 /* Check rejected value. */ \
657 if (cilong != val2) \
663 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
665 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
670 GETSHORT(cishort, p); \
671 /* Check rejected value. */ \
672 if (cishort != val) \
675 GETCHAR(cimaxslotindex, p); \
676 if (cimaxslotindex != maxslot) \
678 GETCHAR(ciflag, p); \
679 if (ciflag != cflag) \
685 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
686 go->old_addrs, go->ouraddr, go->hisaddr);
688 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
689 go->maxslotindex, go->cflag);
692 * If there are any remaining CIs, then this packet is bad.
697 * Now we can update state.
699 if (f->state != OPENED)
704 IPCPDEBUG((LOG_INFO, "ipcp_rejci: received bad Reject!"));
710 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
712 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
713 * appropriately. If reject_if_disagree is non-zero, doesn't return
714 * CONFNAK; returns CONFREJ if it can't return CONFACK.
717 ipcp_reqci(f, inp, len, reject_if_disagree)
719 u_char *inp; /* Requested CIs */
720 int *len; /* Length of requested CIs */
721 int reject_if_disagree;
723 ipcp_options *wo = &ipcp_wantoptions[f->unit];
724 ipcp_options *ho = &ipcp_hisoptions[f->unit];
725 ipcp_options *ao = &ipcp_allowoptions[f->unit];
726 ipcp_options *go = &ipcp_gotoptions[f->unit];
727 u_char *cip, *next; /* Pointer to current and next CIs */
728 u_short cilen, citype; /* Parsed len, type */
729 u_short cishort; /* Parsed short value */
730 u_long tl, ciaddr1, ciaddr2;/* Parsed address values */
731 int rc = CONFACK; /* Final packet return code */
732 int orc; /* Individual option return code */
733 u_char *p; /* Pointer to next char to parse */
734 u_char *ucp = inp; /* Pointer to current output char */
735 int l = *len; /* Length left */
736 u_char maxslotindex, cflag;
739 * Reset all his options.
741 BZERO(ho, sizeof(*ho));
744 * Process all his options.
748 orc = CONFACK; /* Assume success */
749 cip = p = next; /* Remember begining of CI */
750 if (l < 2 || /* Not enough data for CI header or */
751 p[1] < 2 || /* CI length too small or */
752 p[1] > l) { /* CI length too big? */
753 IPCPDEBUG((LOG_INFO, "ipcp_reqci: bad CI length!"));
754 orc = CONFREJ; /* Reject bad CI */
755 cilen = l; /* Reject till end of packet */
756 l = 0; /* Don't loop again */
759 GETCHAR(citype, p); /* Parse CI type */
760 GETCHAR(cilen, p); /* Parse CI length */
761 l -= cilen; /* Adjust remaining length */
762 next += cilen; /* Step to next CI */
764 switch (citype) { /* Check CI type */
766 IPCPDEBUG((LOG_INFO, "ipcp: received ADDRS "));
768 cilen != CILEN_ADDRS) { /* Check CI length */
769 orc = CONFREJ; /* Reject CI */
774 * If he has no address, or if we both have his address but
775 * disagree about it, then NAK it with our idea.
776 * In particular, if we don't know his address, but he does,
779 GETLONG(tl, p); /* Parse source address (his) */
781 IPCPDEBUG((LOG_INFO, "(%s:", ip_ntoa(ciaddr1)));
782 if (ciaddr1 != wo->hisaddr
783 && (ciaddr1 == 0 || !wo->accept_remote)) {
785 if (!reject_if_disagree) {
786 DECPTR(sizeof (long), p);
787 tl = ntohl(wo->hisaddr);
793 * If he doesn't know our address, or if we both have our address
794 * but disagree about it, then NAK it with our idea.
796 GETLONG(tl, p); /* Parse desination address (ours) */
798 IPCPDEBUG((LOG_INFO, "%s)", ip_ntoa(ciaddr2)));
799 if (ciaddr2 != wo->ouraddr) {
800 if (ciaddr2 == 0 || !wo->accept_local) {
802 if (!reject_if_disagree) {
803 DECPTR(sizeof (long), p);
804 tl = ntohl(wo->ouraddr);
808 go->ouraddr = ciaddr2; /* accept peer's idea */
814 ho->hisaddr = ciaddr1;
815 ho->ouraddr = ciaddr2;
819 IPCPDEBUG((LOG_INFO, "ipcp: received ADDR "));
822 cilen != CILEN_ADDR) { /* Check CI length */
823 orc = CONFREJ; /* Reject CI */
828 * If he has no address, or if we both have his address but
829 * disagree about it, then NAK it with our idea.
830 * In particular, if we don't know his address, but he does,
833 GETLONG(tl, p); /* Parse source address (his) */
835 IPCPDEBUG((LOG_INFO, "(%s)", ip_ntoa(ciaddr1)));
836 if (ciaddr1 != wo->hisaddr
837 && (ciaddr1 == 0 || !wo->accept_remote)) {
839 if (!reject_if_disagree) {
840 DECPTR(sizeof (long), p);
841 tl = ntohl(wo->hisaddr);
847 ho->hisaddr = ciaddr1;
850 case CI_COMPRESSTYPE:
851 IPCPDEBUG((LOG_INFO, "ipcp: received COMPRESSTYPE "));
853 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
857 GETSHORT(cishort, p);
858 IPCPDEBUG((LOG_INFO, "(%d)", cishort));
860 if (!(cishort == IPCP_VJ_COMP ||
861 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
867 ho->vj_protocol = cishort;
868 if (cilen == CILEN_VJ) {
869 GETCHAR(maxslotindex, p);
870 if (maxslotindex > ao->maxslotindex) {
872 if (!reject_if_disagree){
874 PUTCHAR(ao->maxslotindex, p);
878 if (cflag && !ao->cflag) {
880 if (!reject_if_disagree){
882 PUTCHAR(wo->cflag, p);
885 ho->maxslotindex = maxslotindex;
886 ho->cflag = wo->cflag;
889 ho->maxslotindex = MAX_STATES - 1;
900 IPCPDEBUG((LOG_INFO, " (%s)\n", CODENAME(orc)));
902 if (orc == CONFACK && /* Good CI */
903 rc != CONFACK) /* but prior CI wasnt? */
904 continue; /* Don't send this one */
906 if (orc == CONFNAK) { /* Nak this CI? */
907 if (reject_if_disagree) /* Getting fed up with sending NAKs? */
908 orc = CONFREJ; /* Get tough if so */
910 if (rc == CONFREJ) /* Rejecting prior CI? */
911 continue; /* Don't send this one */
912 if (rc == CONFACK) { /* Ack'd all prior CIs? */
913 rc = CONFNAK; /* Not anymore... */
914 ucp = inp; /* Backup */
919 if (orc == CONFREJ && /* Reject this CI */
920 rc != CONFREJ) { /* but no prior ones? */
922 ucp = inp; /* Backup */
925 /* Need to move CI? */
927 BCOPY(cip, ucp, cilen); /* Move it */
929 /* Update output pointer */
934 * If we aren't rejecting this packet, and we want to negotiate
935 * their address, and they didn't send their address, then we
936 * send a NAK with a CI_ADDR option appended. We assume the
937 * input buffer is long enough that we can append the extra
940 if (rc != CONFREJ && !ho->neg_addr &&
941 wo->req_addr && !reject_if_disagree) {
944 ucp = inp; /* reset pointer */
945 wo->req_addr = 0; /* don't ask again */
947 PUTCHAR(CI_ADDR, ucp);
948 PUTCHAR(CILEN_ADDR, ucp);
949 tl = ntohl(wo->hisaddr);
953 *len = ucp - inp; /* Compute output length */
954 IPCPDEBUG((LOG_INFO, "ipcp: returning Configure-%s", CODENAME(rc)));
955 return (rc); /* Return final code */
960 * ipcp_up - IPCP has come UP.
962 * Configure the IP network interface appropriately and bring it up.
969 ipcp_options *ho = &ipcp_hisoptions[f->unit];
970 ipcp_options *go = &ipcp_gotoptions[f->unit];
972 IPCPDEBUG((LOG_INFO, "ipcp: up"));
973 go->default_route = 0;
977 * We must have a non-zero IP address for both ends of the link.
980 ho->hisaddr = ipcp_wantoptions[f->unit].hisaddr;
982 if (ho->hisaddr == 0) {
983 syslog(LOG_ERR, "Could not determine remote IP address");
987 if (go->ouraddr == 0) {
988 syslog(LOG_ERR, "Could not determine local IP address");
994 * Check that the peer is allowed to use the IP address it wants.
996 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
997 syslog(LOG_ERR, "Peer is not authorized to use remote address %s",
998 ip_ntoa(ho->hisaddr));
1003 syslog(LOG_NOTICE, "local IP address %s", ip_ntoa(go->ouraddr));
1004 syslog(LOG_NOTICE, "remote IP address %s", ip_ntoa(ho->hisaddr));
1007 * Set IP addresses and (if specified) netmask.
1009 mask = GetMask(go->ouraddr);
1010 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
1011 IPCPDEBUG((LOG_WARNING, "sifaddr failed"));
1012 ipcp_close(f->unit);
1016 /* set tcp compression */
1017 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
1019 /* bring the interface up for IP */
1020 if (!sifup(f->unit)) {
1021 IPCPDEBUG((LOG_WARNING, "sifup failed"));
1022 ipcp_close(f->unit);
1026 /* assign a default route through the interface if required */
1027 if (ipcp_wantoptions[f->unit].default_route)
1028 if (sifdefaultroute(f->unit, ho->hisaddr))
1029 go->default_route = 1;
1031 /* Make a proxy ARP entry if requested. */
1032 if (ipcp_wantoptions[f->unit].proxy_arp)
1033 if (sifproxyarp(f->unit, ho->hisaddr))
1037 * Execute the ip-up script, like this:
1038 * /etc/ppp/ip-up interface tty speed local-IP remote-IP
1040 ipcp_script(f, _PATH_IPUP);
1046 * ipcp_down - IPCP has gone DOWN.
1048 * Take the IP network interface down, clear its addresses
1049 * and delete routes through it.
1055 u_long ouraddr, hisaddr;
1057 IPCPDEBUG((LOG_INFO, "ipcp: down"));
1059 ouraddr = ipcp_gotoptions[f->unit].ouraddr;
1060 hisaddr = ipcp_hisoptions[f->unit].hisaddr;
1061 if (ipcp_gotoptions[f->unit].proxy_arp)
1062 cifproxyarp(f->unit, hisaddr);
1063 if (ipcp_gotoptions[f->unit].default_route)
1064 cifdefaultroute(f->unit, hisaddr);
1066 cifaddr(f->unit, ouraddr, hisaddr);
1068 /* Execute the ip-down script */
1069 ipcp_script(f, _PATH_IPDOWN);
1074 * ipcp_script - Execute a script with arguments
1075 * interface-name tty-name speed local-IP remote-IP.
1078 ipcp_script(f, script)
1082 char strspeed[32], strlocal[32], strremote[32];
1085 sprintf(strspeed, "%d", baud_rate);
1086 strcpy(strlocal, ip_ntoa(ipcp_gotoptions[f->unit].ouraddr));
1087 strcpy(strremote, ip_ntoa(ipcp_hisoptions[f->unit].hisaddr));
1094 argv[5] = strremote;
1096 run_program(script, argv, 0);
1100 * ipcp_printpkt - print the contents of an IPCP packet.
1102 char *ipcp_codenames[] = {
1103 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
1104 "TermReq", "TermAck", "CodeRej"
1108 ipcp_printpkt(p, plen, printer, arg)
1114 int code, id, len, olen;
1115 u_char *pstart, *optend;
1119 if (plen < HEADERLEN)
1125 if (len < HEADERLEN || len > plen)
1128 if (code >= 1 && code <= sizeof(ipcp_codenames) / sizeof(char *))
1129 printer(arg, " %s", ipcp_codenames[code-1]);
1131 printer(arg, " code=0x%x", code);
1132 printer(arg, " id=0x%x", id);
1139 /* print option list */
1144 if (olen < 2 || olen > len) {
1152 if (olen == CILEN_ADDRS) {
1155 printer(arg, "addrs %s", ip_ntoa(htonl(cilong)));
1157 printer(arg, " %s", ip_ntoa(htonl(cilong)));
1160 case CI_COMPRESSTYPE:
1161 if (olen >= CILEN_COMPRESS) {
1163 GETSHORT(cishort, p);
1164 printer(arg, "compress ");
1169 case IPCP_VJ_COMP_OLD:
1170 printer(arg, "old-VJ");
1173 printer(arg, "0x%x", cishort);
1178 if (olen == CILEN_ADDR) {
1181 printer(arg, "addr %s", ip_ntoa(htonl(cilong)));
1185 while (p < optend) {
1187 printer(arg, " %.2x", code);
1194 /* print the rest of the bytes in the packet */
1195 for (; len > 0; --len) {
1197 printer(arg, " %.2x", code);