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 1.12 1994/10/10 01:59:17 paulus Exp $";
31 #include <sys/types.h>
32 #include <sys/socket.h>
37 #include "pathnames.h"
40 ipcp_options ipcp_wantoptions[N_PPP]; /* Options that we want to request */
41 ipcp_options ipcp_gotoptions[N_PPP]; /* Options that peer ack'd */
42 ipcp_options ipcp_allowoptions[N_PPP]; /* Options we allow peer to request */
43 ipcp_options ipcp_hisoptions[N_PPP]; /* Options that we ack'd */
46 static int cis_received[N_PPP]; /* # Conf-Reqs received */
49 * Callbacks for fsm code. (CI = Configuration Information)
51 static void ipcp_resetci __P((fsm *)); /* Reset our CI */
52 static int ipcp_cilen __P((fsm *)); /* Return length of our CI */
53 static void ipcp_addci __P((fsm *, u_char *, int *)); /* Add our CI */
54 static int ipcp_ackci __P((fsm *, u_char *, int)); /* Peer ack'd our CI */
55 static int ipcp_nakci __P((fsm *, u_char *, int)); /* Peer nak'd our CI */
56 static int ipcp_rejci __P((fsm *, u_char *, int)); /* Peer rej'd our CI */
57 static int ipcp_reqci __P((fsm *, u_char *, int *, int)); /* Rcv CI */
58 static void ipcp_up __P((fsm *)); /* We're UP */
59 static void ipcp_down __P((fsm *)); /* We're DOWN */
60 static void ipcp_script __P((fsm *, char *)); /* Run an up/down script */
62 fsm ipcp_fsm[N_PPP]; /* IPCP fsm structure */
64 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
65 ipcp_resetci, /* Reset our Configuration Information */
66 ipcp_cilen, /* Length of our Configuration Information */
67 ipcp_addci, /* Add our Configuration Information */
68 ipcp_ackci, /* ACK our Configuration Information */
69 ipcp_nakci, /* NAK our Configuration Information */
70 ipcp_rejci, /* Reject our Configuration Information */
71 ipcp_reqci, /* Request peer's Configuration Information */
72 ipcp_up, /* Called when fsm reaches OPENED state */
73 ipcp_down, /* Called when fsm leaves OPENED state */
74 NULL, /* Called when we want the lower layer up */
75 NULL, /* Called when we want the lower layer down */
76 NULL, /* Called when Protocol-Reject received */
77 NULL, /* Retransmission is necessary */
78 NULL, /* Called to handle protocol-specific codes */
79 "IPCP" /* String name of protocol */
83 * Lengths of configuration options.
86 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
87 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
88 #define CILEN_ADDR 6 /* new-style single address option */
89 #define CILEN_ADDRS 10 /* old-style dual address option */
92 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
93 (x) == CONFNAK ? "NAK" : "REJ")
97 * Make a string representation of a network IP address.
105 ipaddr = ntohl(ipaddr);
107 sprintf(b, "%d.%d.%d.%d",
108 (u_char)(ipaddr >> 24),
109 (u_char)(ipaddr >> 16),
110 (u_char)(ipaddr >> 8),
117 * ipcp_init - Initialize IPCP.
123 fsm *f = &ipcp_fsm[unit];
124 ipcp_options *wo = &ipcp_wantoptions[unit];
125 ipcp_options *ao = &ipcp_allowoptions[unit];
128 f->protocol = PPP_IPCP;
129 f->callbacks = &ipcp_callbacks;
130 fsm_init(&ipcp_fsm[unit]);
139 wo->vj_protocol = IPCP_VJ_COMP;
140 wo->maxslotindex = MAX_STATES - 1; /* really max index */
143 /* max slots and slot-id compression are currently hardwired in */
144 /* ppp_if.c to 16 and 1, this needs to be changed (among other */
149 ao->maxslotindex = MAX_STATES - 1;
155 * ipcp_open - IPCP is allowed to come up.
161 fsm_open(&ipcp_fsm[unit]);
166 * ipcp_close - Take IPCP down.
172 fsm_close(&ipcp_fsm[unit]);
177 * ipcp_lowerup - The lower layer is up.
183 fsm_lowerup(&ipcp_fsm[unit]);
188 * ipcp_lowerdown - The lower layer is down.
194 fsm_lowerdown(&ipcp_fsm[unit]);
199 * ipcp_input - Input IPCP packet.
202 ipcp_input(unit, p, len)
207 fsm_input(&ipcp_fsm[unit], p, len);
212 * ipcp_protrej - A Protocol-Reject was received for IPCP.
214 * Pretend the lower layer went down, so we shut up.
220 fsm_lowerdown(&ipcp_fsm[unit]);
225 * ipcp_resetci - Reset our CI.
231 ipcp_options *wo = &ipcp_wantoptions[f->unit];
233 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
234 if (wo->ouraddr == 0)
235 wo->accept_local = 1;
236 if (wo->hisaddr == 0)
237 wo->accept_remote = 1;
238 ipcp_gotoptions[f->unit] = *wo;
239 cis_received[f->unit] = 0;
244 * ipcp_cilen - Return length of our CI.
250 ipcp_options *go = &ipcp_gotoptions[f->unit];
252 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
253 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
255 return (LENCIADDR(go->neg_addr, go->old_addrs) +
256 LENCIVJ(go->neg_vj, go->old_vj));
261 * ipcp_addci - Add our desired CIs to a packet.
264 ipcp_addci(f, ucp, lenp)
269 ipcp_options *wo = &ipcp_wantoptions[f->unit];
270 ipcp_options *go = &ipcp_gotoptions[f->unit];
271 ipcp_options *ho = &ipcp_hisoptions[f->unit];
274 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
276 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
277 if (len >= vjlen) { \
279 PUTCHAR(vjlen, ucp); \
280 PUTSHORT(val, ucp); \
282 PUTCHAR(maxslotindex, ucp); \
283 PUTCHAR(cflag, ucp); \
290 #define ADDCIADDR(opt, neg, old, val1, val2) \
292 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
293 if (len >= addrlen) { \
296 PUTCHAR(addrlen, ucp); \
309 * First see if we want to change our options to the old
310 * forms because we have received old forms from the peer.
312 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
313 /* use the old style of address negotiation */
317 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
318 /* try an older style of VJ negotiation */
319 if (cis_received[f->unit] == 0) {
320 /* keep trying the new style until we see some CI from the peer */
323 /* use the old style only if the peer did */
324 if (ho->neg_vj && ho->old_vj) {
327 go->vj_protocol = ho->vj_protocol;
332 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
333 go->old_addrs, go->ouraddr, go->hisaddr);
335 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
336 go->maxslotindex, go->cflag);
343 * ipcp_ackci - Ack our CIs.
350 ipcp_ackci(f, p, len)
355 ipcp_options *go = &ipcp_gotoptions[f->unit];
356 u_short cilen, citype, cishort;
358 u_char cimaxslotindex, cicflag;
361 * CIs must be in exactly the same order that we sent...
362 * Check packet length and CI length at each step.
363 * If we find any deviations, then this packet is bad.
366 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
368 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
369 if ((len -= vjlen) < 0) \
371 GETCHAR(citype, p); \
373 if (cilen != vjlen || \
376 GETSHORT(cishort, p); \
377 if (cishort != val) \
380 GETCHAR(cimaxslotindex, p); \
381 if (cimaxslotindex != maxslotindex) \
383 GETCHAR(cicflag, p); \
384 if (cicflag != cflag) \
389 #define ACKCIADDR(opt, neg, old, val1, val2) \
391 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
393 if ((len -= addrlen) < 0) \
395 GETCHAR(citype, p); \
397 if (cilen != addrlen || \
402 if (val1 != cilong) \
407 if (val2 != cilong) \
412 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
413 go->old_addrs, go->ouraddr, go->hisaddr);
415 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
416 go->maxslotindex, go->cflag);
419 * If there are any remaining CIs, then this packet is bad.
426 IPCPDEBUG((LOG_INFO, "ipcp_ackci: received bad Ack!"));
431 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
432 * This should not modify any state if the Nak is bad
433 * or if IPCP is in the OPENED state.
440 ipcp_nakci(f, p, len)
445 ipcp_options *go = &ipcp_gotoptions[f->unit];
446 u_char cimaxslotindex, cicflag;
447 u_char citype, cilen, *next;
449 u_int32_t ciaddr1, ciaddr2, l;
450 ipcp_options no; /* options we've seen Naks for */
451 ipcp_options try; /* options to request next time */
453 BZERO(&no, sizeof(no));
457 * Any Nak'd CIs must be in exactly the same order that we sent.
458 * Check packet length and CI length at each step.
459 * If we find any deviations, then this packet is bad.
461 #define NAKCIADDR(opt, neg, old, code) \
463 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
469 ciaddr1 = htonl(l); \
472 ciaddr2 = htonl(l); \
480 #define NAKCIVJ(opt, neg, code) \
482 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
487 GETSHORT(cishort, p); \
493 * Accept the peer's idea of {our,his} address, if different
494 * from our idea, only if the accept_{local,remote} flag is set.
496 NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
497 if (go->accept_local && ciaddr1) { /* Do we know our address? */
498 try.ouraddr = ciaddr1;
499 IPCPDEBUG((LOG_INFO, "local IP address %s",
502 if (go->accept_remote && ciaddr2) { /* Does he know his? */
503 try.hisaddr = ciaddr2;
504 IPCPDEBUG((LOG_INFO, "remote IP address %s",
510 * Accept the peer's value of maxslotindex provided that it
511 * is less than what we asked for. Turn off slot-ID compression
512 * if the peer wants. Send old-style compress-type option if
515 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
516 if (cilen == CILEN_VJ) {
517 GETCHAR(cimaxslotindex, p);
519 if (cishort == IPCP_VJ_COMP) {
521 if (cimaxslotindex < go->maxslotindex)
522 try.maxslotindex = cimaxslotindex;
529 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
531 try.vj_protocol = cishort;
539 * There may be remaining CIs, if the peer is requesting negotiation
540 * on an option that we didn't include in our request packet.
541 * If they want to negotiate about IP addresses, we comply.
542 * If they want us to ask for compression, we refuse.
544 while (len > CILEN_VOID) {
547 if( (len -= cilen) < 0 )
549 next = p + cilen - 2;
552 case CI_COMPRESSTYPE:
553 if (go->neg_vj || no.neg_vj ||
554 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS))
559 if (go->neg_addr && go->old_addrs || no.old_addrs
560 || cilen != CILEN_ADDRS)
566 if (ciaddr1 && go->accept_local)
567 try.ouraddr = ciaddr1;
570 if (ciaddr2 && go->accept_remote)
571 try.hisaddr = ciaddr2;
575 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR)
581 if (ciaddr1 && go->accept_local)
582 try.ouraddr = ciaddr1;
591 /* If there is still anything left, this packet is bad. */
596 * OK, the Nak is good. Now we can update state.
598 if (f->state != OPENED)
604 IPCPDEBUG((LOG_INFO, "ipcp_nakci: received bad Nak!"));
610 * ipcp_rejci - Reject some of our CIs.
613 ipcp_rejci(f, p, len)
618 ipcp_options *go = &ipcp_gotoptions[f->unit];
619 u_char cimaxslotindex, ciflag, cilen;
622 ipcp_options try; /* options to request next time */
626 * Any Rejected CIs must be in exactly the same order that we sent.
627 * Check packet length and CI length at each step.
628 * If we find any deviations, then this packet is bad.
630 #define REJCIADDR(opt, neg, old, val1, val2) \
632 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
640 /* Check rejected value. */ \
641 if (cilong != val1) \
646 /* Check rejected value. */ \
647 if (cilong != val2) \
653 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
655 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
660 GETSHORT(cishort, p); \
661 /* Check rejected value. */ \
662 if (cishort != val) \
665 GETCHAR(cimaxslotindex, p); \
666 if (cimaxslotindex != maxslot) \
668 GETCHAR(ciflag, p); \
669 if (ciflag != cflag) \
675 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
676 go->old_addrs, go->ouraddr, go->hisaddr);
678 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
679 go->maxslotindex, go->cflag);
682 * If there are any remaining CIs, then this packet is bad.
687 * Now we can update state.
689 if (f->state != OPENED)
694 IPCPDEBUG((LOG_INFO, "ipcp_rejci: received bad Reject!"));
700 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
702 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
703 * appropriately. If reject_if_disagree is non-zero, doesn't return
704 * CONFNAK; returns CONFREJ if it can't return CONFACK.
707 ipcp_reqci(f, inp, len, reject_if_disagree)
709 u_char *inp; /* Requested CIs */
710 int *len; /* Length of requested CIs */
711 int reject_if_disagree;
713 ipcp_options *wo = &ipcp_wantoptions[f->unit];
714 ipcp_options *ho = &ipcp_hisoptions[f->unit];
715 ipcp_options *ao = &ipcp_allowoptions[f->unit];
716 ipcp_options *go = &ipcp_gotoptions[f->unit];
717 u_char *cip, *next; /* Pointer to current and next CIs */
718 u_short cilen, citype; /* Parsed len, type */
719 u_short cishort; /* Parsed short value */
720 u_int32_t tl, ciaddr1, ciaddr2;/* Parsed address values */
721 int rc = CONFACK; /* Final packet return code */
722 int orc; /* Individual option return code */
723 u_char *p; /* Pointer to next char to parse */
724 u_char *ucp = inp; /* Pointer to current output char */
725 int l = *len; /* Length left */
726 u_char maxslotindex, cflag;
729 * Reset all his options.
731 BZERO(ho, sizeof(*ho));
734 * Process all his options.
738 orc = CONFACK; /* Assume success */
739 cip = p = next; /* Remember begining of CI */
740 if (l < 2 || /* Not enough data for CI header or */
741 p[1] < 2 || /* CI length too small or */
742 p[1] > l) { /* CI length too big? */
743 IPCPDEBUG((LOG_INFO, "ipcp_reqci: bad CI length!"));
744 orc = CONFREJ; /* Reject bad CI */
745 cilen = l; /* Reject till end of packet */
746 l = 0; /* Don't loop again */
749 GETCHAR(citype, p); /* Parse CI type */
750 GETCHAR(cilen, p); /* Parse CI length */
751 l -= cilen; /* Adjust remaining length */
752 next += cilen; /* Step to next CI */
754 switch (citype) { /* Check CI type */
756 IPCPDEBUG((LOG_INFO, "ipcp: received ADDRS "));
758 cilen != CILEN_ADDRS) { /* Check CI length */
759 orc = CONFREJ; /* Reject CI */
764 * If he has no address, or if we both have his address but
765 * disagree about it, then NAK it with our idea.
766 * In particular, if we don't know his address, but he does,
769 GETLONG(tl, p); /* Parse source address (his) */
771 IPCPDEBUG((LOG_INFO, "(%s:", ip_ntoa(ciaddr1)));
772 if (ciaddr1 != wo->hisaddr
773 && (ciaddr1 == 0 || !wo->accept_remote)) {
775 if (!reject_if_disagree) {
776 DECPTR(sizeof (long), p);
777 tl = ntohl(wo->hisaddr);
783 * If he doesn't know our address, or if we both have our address
784 * but disagree about it, then NAK it with our idea.
786 GETLONG(tl, p); /* Parse desination address (ours) */
788 IPCPDEBUG((LOG_INFO, "%s)", ip_ntoa(ciaddr2)));
789 if (ciaddr2 != wo->ouraddr) {
790 if (ciaddr2 == 0 || !wo->accept_local) {
792 if (!reject_if_disagree) {
793 DECPTR(sizeof (long), p);
794 tl = ntohl(wo->ouraddr);
798 go->ouraddr = ciaddr2; /* accept peer's idea */
804 ho->hisaddr = ciaddr1;
805 ho->ouraddr = ciaddr2;
809 IPCPDEBUG((LOG_INFO, "ipcp: received ADDR "));
812 cilen != CILEN_ADDR) { /* Check CI length */
813 orc = CONFREJ; /* Reject CI */
818 * If he has no address, or if we both have his address but
819 * disagree about it, then NAK it with our idea.
820 * In particular, if we don't know his address, but he does,
823 GETLONG(tl, p); /* Parse source address (his) */
825 IPCPDEBUG((LOG_INFO, "(%s)", ip_ntoa(ciaddr1)));
826 if (ciaddr1 != wo->hisaddr
827 && (ciaddr1 == 0 || !wo->accept_remote)) {
829 if (!reject_if_disagree) {
830 DECPTR(sizeof (long), p);
831 tl = ntohl(wo->hisaddr);
837 ho->hisaddr = ciaddr1;
840 case CI_COMPRESSTYPE:
841 IPCPDEBUG((LOG_INFO, "ipcp: received COMPRESSTYPE "));
843 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
847 GETSHORT(cishort, p);
848 IPCPDEBUG((LOG_INFO, "(%d)", cishort));
850 if (!(cishort == IPCP_VJ_COMP ||
851 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
857 ho->vj_protocol = cishort;
858 if (cilen == CILEN_VJ) {
859 GETCHAR(maxslotindex, p);
860 if (maxslotindex > ao->maxslotindex) {
862 if (!reject_if_disagree){
864 PUTCHAR(ao->maxslotindex, p);
868 if (cflag && !ao->cflag) {
870 if (!reject_if_disagree){
872 PUTCHAR(wo->cflag, p);
875 ho->maxslotindex = maxslotindex;
876 ho->cflag = wo->cflag;
879 ho->maxslotindex = MAX_STATES - 1;
890 IPCPDEBUG((LOG_INFO, " (%s)\n", CODENAME(orc)));
892 if (orc == CONFACK && /* Good CI */
893 rc != CONFACK) /* but prior CI wasnt? */
894 continue; /* Don't send this one */
896 if (orc == CONFNAK) { /* Nak this CI? */
897 if (reject_if_disagree) /* Getting fed up with sending NAKs? */
898 orc = CONFREJ; /* Get tough if so */
900 if (rc == CONFREJ) /* Rejecting prior CI? */
901 continue; /* Don't send this one */
902 if (rc == CONFACK) { /* Ack'd all prior CIs? */
903 rc = CONFNAK; /* Not anymore... */
904 ucp = inp; /* Backup */
909 if (orc == CONFREJ && /* Reject this CI */
910 rc != CONFREJ) { /* but no prior ones? */
912 ucp = inp; /* Backup */
915 /* Need to move CI? */
917 BCOPY(cip, ucp, cilen); /* Move it */
919 /* Update output pointer */
924 * If we aren't rejecting this packet, and we want to negotiate
925 * their address, and they didn't send their address, then we
926 * send a NAK with a CI_ADDR option appended. We assume the
927 * input buffer is long enough that we can append the extra
930 if (rc != CONFREJ && !ho->neg_addr &&
931 wo->req_addr && !reject_if_disagree) {
934 ucp = inp; /* reset pointer */
935 wo->req_addr = 0; /* don't ask again */
937 PUTCHAR(CI_ADDR, ucp);
938 PUTCHAR(CILEN_ADDR, ucp);
939 tl = ntohl(wo->hisaddr);
943 *len = ucp - inp; /* Compute output length */
944 IPCPDEBUG((LOG_INFO, "ipcp: returning Configure-%s", CODENAME(rc)));
945 return (rc); /* Return final code */
950 * ipcp_up - IPCP has come UP.
952 * Configure the IP network interface appropriately and bring it up.
959 ipcp_options *ho = &ipcp_hisoptions[f->unit];
960 ipcp_options *go = &ipcp_gotoptions[f->unit];
962 IPCPDEBUG((LOG_INFO, "ipcp: up"));
963 go->default_route = 0;
967 * We must have a non-zero IP address for both ends of the link.
970 ho->hisaddr = ipcp_wantoptions[f->unit].hisaddr;
972 if (ho->hisaddr == 0) {
973 syslog(LOG_ERR, "Could not determine remote IP address");
977 if (go->ouraddr == 0) {
978 syslog(LOG_ERR, "Could not determine local IP address");
984 * Check that the peer is allowed to use the IP address it wants.
986 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
987 syslog(LOG_ERR, "Peer is not authorized to use remote address %s",
988 ip_ntoa(ho->hisaddr));
993 syslog(LOG_NOTICE, "local IP address %s", ip_ntoa(go->ouraddr));
994 syslog(LOG_NOTICE, "remote IP address %s", ip_ntoa(ho->hisaddr));
997 * Set IP addresses and (if specified) netmask.
999 mask = GetMask(go->ouraddr);
1000 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
1001 IPCPDEBUG((LOG_WARNING, "sifaddr failed"));
1002 ipcp_close(f->unit);
1006 /* set tcp compression */
1007 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
1009 /* bring the interface up for IP */
1010 if (!sifup(f->unit)) {
1011 IPCPDEBUG((LOG_WARNING, "sifup failed"));
1012 ipcp_close(f->unit);
1016 /* assign a default route through the interface if required */
1017 if (ipcp_wantoptions[f->unit].default_route)
1018 if (sifdefaultroute(f->unit, ho->hisaddr))
1019 go->default_route = 1;
1021 /* Make a proxy ARP entry if requested. */
1022 if (ipcp_wantoptions[f->unit].proxy_arp)
1023 if (sifproxyarp(f->unit, ho->hisaddr))
1027 * Execute the ip-up script, like this:
1028 * /etc/ppp/ip-up interface tty speed local-IP remote-IP
1030 ipcp_script(f, _PATH_IPUP);
1036 * ipcp_down - IPCP has gone DOWN.
1038 * Take the IP network interface down, clear its addresses
1039 * and delete routes through it.
1045 u_int32_t ouraddr, hisaddr;
1047 IPCPDEBUG((LOG_INFO, "ipcp: down"));
1049 ouraddr = ipcp_gotoptions[f->unit].ouraddr;
1050 hisaddr = ipcp_hisoptions[f->unit].hisaddr;
1051 if (ipcp_gotoptions[f->unit].proxy_arp)
1052 cifproxyarp(f->unit, hisaddr);
1053 if (ipcp_gotoptions[f->unit].default_route)
1054 cifdefaultroute(f->unit, hisaddr);
1056 cifaddr(f->unit, ouraddr, hisaddr);
1058 /* Execute the ip-down script */
1059 ipcp_script(f, _PATH_IPDOWN);
1064 * ipcp_script - Execute a script with arguments
1065 * interface-name tty-name speed local-IP remote-IP.
1068 ipcp_script(f, script)
1072 char strspeed[32], strlocal[32], strremote[32];
1075 sprintf(strspeed, "%d", baud_rate);
1076 strcpy(strlocal, ip_ntoa(ipcp_gotoptions[f->unit].ouraddr));
1077 strcpy(strremote, ip_ntoa(ipcp_hisoptions[f->unit].hisaddr));
1084 argv[5] = strremote;
1086 run_program(script, argv, 0);
1090 * ipcp_printpkt - print the contents of an IPCP packet.
1092 char *ipcp_codenames[] = {
1093 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
1094 "TermReq", "TermAck", "CodeRej"
1098 ipcp_printpkt(p, plen, printer, arg)
1104 int code, id, len, olen;
1105 u_char *pstart, *optend;
1109 if (plen < HEADERLEN)
1115 if (len < HEADERLEN || len > plen)
1118 if (code >= 1 && code <= sizeof(ipcp_codenames) / sizeof(char *))
1119 printer(arg, " %s", ipcp_codenames[code-1]);
1121 printer(arg, " code=0x%x", code);
1122 printer(arg, " id=0x%x", id);
1129 /* print option list */
1134 if (olen < 2 || olen > len) {
1142 if (olen == CILEN_ADDRS) {
1145 printer(arg, "addrs %s", ip_ntoa(htonl(cilong)));
1147 printer(arg, " %s", ip_ntoa(htonl(cilong)));
1150 case CI_COMPRESSTYPE:
1151 if (olen >= CILEN_COMPRESS) {
1153 GETSHORT(cishort, p);
1154 printer(arg, "compress ");
1159 case IPCP_VJ_COMP_OLD:
1160 printer(arg, "old-VJ");
1163 printer(arg, "0x%x", cishort);
1168 if (olen == CILEN_ADDR) {
1171 printer(arg, "addr %s", ip_ntoa(htonl(cilong)));
1175 while (p < optend) {
1177 printer(arg, " %.2x", code);
1184 /* print the rest of the bytes in the packet */
1185 for (; len > 0; --len) {
1187 printer(arg, " %.2x", code);