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 1.4 1994/04/11 07:19:06 paulus Exp $";
30 #include <sys/ioctl.h>
31 #include <sys/types.h>
32 #include <sys/socket.h>
36 #include <net/if_ppp.h>
37 #include <net/route.h>
38 #include <netinet/in.h>
46 #include "pathnames.h"
49 ipcp_options ipcp_wantoptions[NPPP]; /* Options that we want to request */
50 ipcp_options ipcp_gotoptions[NPPP]; /* Options that peer ack'd */
51 ipcp_options ipcp_allowoptions[NPPP]; /* Options we allow peer to request */
52 ipcp_options ipcp_hisoptions[NPPP]; /* Options that we ack'd */
55 extern char devname[];
59 static int cis_received[NPPP]; /* # Conf-Reqs received */
62 * Callbacks for fsm code. (CI = Configuration Information)
64 static void ipcp_resetci __ARGS((fsm *)); /* Reset our CI */
65 static int ipcp_cilen __ARGS((fsm *)); /* Return length of our CI */
66 static void ipcp_addci __ARGS((fsm *, u_char *, int *)); /* Add our CI */
67 static int ipcp_ackci __ARGS((fsm *, u_char *, int)); /* Peer ack'd our CI */
68 static int ipcp_nakci __ARGS((fsm *, u_char *, int)); /* Peer nak'd our CI */
69 static int ipcp_rejci __ARGS((fsm *, u_char *, int)); /* Peer rej'd our CI */
70 static int ipcp_reqci __ARGS((fsm *, u_char *, int *, int)); /* Rcv CI */
71 static void ipcp_up __ARGS((fsm *)); /* We're UP */
72 static void ipcp_down __ARGS((fsm *)); /* We're DOWN */
73 static void ipcp_script __ARGS((fsm *, char *)); /* Run an up/down script */
75 fsm ipcp_fsm[NPPP]; /* IPCP fsm structure */
77 static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
78 ipcp_resetci, /* Reset our Configuration Information */
79 ipcp_cilen, /* Length of our Configuration Information */
80 ipcp_addci, /* Add our Configuration Information */
81 ipcp_ackci, /* ACK our Configuration Information */
82 ipcp_nakci, /* NAK our Configuration Information */
83 ipcp_rejci, /* Reject our Configuration Information */
84 ipcp_reqci, /* Request peer's Configuration Information */
85 ipcp_up, /* Called when fsm reaches OPENED state */
86 ipcp_down, /* Called when fsm leaves OPENED state */
87 NULL, /* Called when we want the lower layer up */
88 NULL, /* Called when we want the lower layer down */
89 NULL, /* Called when Protocol-Reject received */
90 NULL, /* Retransmission is necessary */
91 NULL, /* Called to handle protocol-specific codes */
92 "IPCP" /* String name of protocol */
96 * Lengths of configuration options.
99 #define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
100 #define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
101 #define CILEN_ADDR 6 /* new-style single address option */
102 #define CILEN_ADDRS 10 /* old-style dual address option */
105 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
106 (x) == CONFNAK ? "NAK" : "REJ")
110 * Make a string representation of a network IP address.
118 ipaddr = ntohl(ipaddr);
120 sprintf(b, "%d.%d.%d.%d",
121 (u_char)(ipaddr >> 24),
122 (u_char)(ipaddr >> 16),
123 (u_char)(ipaddr >> 8),
130 * ipcp_init - Initialize IPCP.
136 fsm *f = &ipcp_fsm[unit];
137 ipcp_options *wo = &ipcp_wantoptions[unit];
138 ipcp_options *ao = &ipcp_allowoptions[unit];
142 f->callbacks = &ipcp_callbacks;
143 fsm_init(&ipcp_fsm[unit]);
152 wo->vj_protocol = IPCP_VJ_COMP;
153 wo->maxslotindex = MAX_STATES - 1; /* really max index */
156 /* max slots and slot-id compression are currently hardwired in */
157 /* ppp_if.c to 16 and 1, this needs to be changed (among other */
162 ao->maxslotindex = MAX_STATES - 1;
168 * ipcp_open - IPCP is allowed to come up.
174 fsm_open(&ipcp_fsm[unit]);
179 * ipcp_close - Take IPCP down.
185 fsm_close(&ipcp_fsm[unit]);
190 * ipcp_lowerup - The lower layer is up.
196 fsm_lowerup(&ipcp_fsm[unit]);
201 * ipcp_lowerdown - The lower layer is down.
207 fsm_lowerdown(&ipcp_fsm[unit]);
212 * ipcp_input - Input IPCP packet.
215 ipcp_input(unit, p, len)
220 fsm_input(&ipcp_fsm[unit], p, len);
225 * ipcp_protrej - A Protocol-Reject was received for IPCP.
227 * Pretend the lower layer went down, so we shut up.
233 fsm_lowerdown(&ipcp_fsm[unit]);
238 * ipcp_resetci - Reset our CI.
244 ipcp_options *wo = &ipcp_wantoptions[f->unit];
246 wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
247 if (wo->ouraddr == 0)
248 wo->accept_local = 1;
249 if (wo->hisaddr == 0)
250 wo->accept_remote = 1;
251 ipcp_gotoptions[f->unit] = *wo;
252 cis_received[f->unit] = 0;
257 * ipcp_cilen - Return length of our CI.
263 ipcp_options *go = &ipcp_gotoptions[f->unit];
265 #define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
266 #define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
268 return (LENCIADDR(go->neg_addr, go->old_addrs) +
269 LENCIVJ(go->neg_vj, go->old_vj));
274 * ipcp_addci - Add our desired CIs to a packet.
277 ipcp_addci(f, ucp, lenp)
282 ipcp_options *wo = &ipcp_wantoptions[f->unit];
283 ipcp_options *go = &ipcp_gotoptions[f->unit];
284 ipcp_options *ho = &ipcp_hisoptions[f->unit];
287 #define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
289 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
290 if (len >= vjlen) { \
292 PUTCHAR(vjlen, ucp); \
293 PUTSHORT(val, ucp); \
295 PUTCHAR(maxslotindex, ucp); \
296 PUTCHAR(cflag, ucp); \
303 #define ADDCIADDR(opt, neg, old, val1, val2) \
305 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
306 if (len >= addrlen) { \
309 PUTCHAR(addrlen, ucp); \
322 * First see if we want to change our options to the old
323 * forms because we have received old forms from the peer.
325 if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
326 /* use the old style of address negotiation */
330 if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
331 /* try an older style of VJ negotiation */
332 if (cis_received[f->unit] == 0) {
333 /* keep trying the new style until we see some CI from the peer */
336 /* use the old style only if the peer did */
337 if (ho->neg_vj && ho->old_vj) {
340 go->vj_protocol = ho->vj_protocol;
345 ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
346 go->old_addrs, go->ouraddr, go->hisaddr);
348 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
349 go->maxslotindex, go->cflag);
356 * ipcp_ackci - Ack our CIs.
363 ipcp_ackci(f, p, len)
368 ipcp_options *go = &ipcp_gotoptions[f->unit];
369 u_short cilen, citype, cishort;
371 u_char cimaxslotindex, cicflag;
374 * CIs must be in exactly the same order that we sent...
375 * Check packet length and CI length at each step.
376 * If we find any deviations, then this packet is bad.
379 #define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
381 int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
382 if ((len -= vjlen) < 0) \
384 GETCHAR(citype, p); \
386 if (cilen != vjlen || \
389 GETSHORT(cishort, p); \
390 if (cishort != val) \
393 GETCHAR(cimaxslotindex, p); \
394 if (cimaxslotindex != maxslotindex) \
396 GETCHAR(cicflag, p); \
397 if (cicflag != cflag) \
402 #define ACKCIADDR(opt, neg, old, val1, val2) \
404 int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
406 if ((len -= addrlen) < 0) \
408 GETCHAR(citype, p); \
410 if (cilen != addrlen || \
415 if (val1 != cilong) \
420 if (val2 != cilong) \
425 ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
426 go->old_addrs, go->ouraddr, go->hisaddr);
428 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
429 go->maxslotindex, go->cflag);
432 * If there are any remaining CIs, then this packet is bad.
439 IPCPDEBUG((LOG_INFO, "ipcp_ackci: received bad Ack!"));
444 * ipcp_nakci - Peer has sent a NAK for some of our CIs.
445 * This should not modify any state if the Nak is bad
446 * or if IPCP is in the OPENED state.
453 ipcp_nakci(f, p, len)
458 ipcp_options *go = &ipcp_gotoptions[f->unit];
459 u_char cimaxslotindex, cicflag;
460 u_char citype, cilen, *next;
462 u_long ciaddr1, ciaddr2, l;
463 ipcp_options no; /* options we've seen Naks for */
464 ipcp_options try; /* options to request next time */
466 BZERO(&no, sizeof(no));
470 * Any Nak'd CIs must be in exactly the same order that we sent.
471 * Check packet length and CI length at each step.
472 * If we find any deviations, then this packet is bad.
474 #define NAKCIADDR(opt, neg, old, code) \
476 len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
482 ciaddr1 = htonl(l); \
485 ciaddr2 = htonl(l); \
493 #define NAKCIVJ(opt, neg, code) \
495 ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
500 GETSHORT(cishort, p); \
501 if (cilen == CILEN_VJ) { \
502 GETCHAR(cimaxslotindex, p); \
503 GETCHAR(cicflag, p); \
510 * Accept the peer's idea of {our,his} address, if different
511 * from our idea, only if the accept_{local,remote} flag is set.
513 NAKCIADDR(CI_ADDR, neg_addr, go->old_addrs,
514 if (go->accept_local && ciaddr1) { /* Do we know our address? */
515 try.ouraddr = ciaddr1;
516 IPCPDEBUG((LOG_INFO, "local IP address %s",
519 if (go->accept_remote && ciaddr2) { /* Does he know his? */
520 try.hisaddr = ciaddr2;
521 IPCPDEBUG((LOG_INFO, "remote IP address %s",
527 * Accept the peer's value of maxslotindex provided that it
528 * is less than what we asked for. Turn off slot-ID compression
529 * if the peer wants. Send old-style compress-type option if
532 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
533 if (cilen == CILEN_VJ) {
534 if (cishort == IPCP_VJ_COMP) {
536 if (cimaxslotindex < go->maxslotindex)
537 try.maxslotindex = cimaxslotindex;
544 if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
546 try.vj_protocol = cishort;
554 * There may be remaining CIs, if the peer is requesting negotiation
555 * on an option that we didn't include in our request packet.
556 * If they want to negotiate about IP addresses, we comply.
557 * If they want us to ask for compression, we refuse.
559 while (len > CILEN_VOID) {
562 if( (len -= cilen) < 0 )
564 next = p + cilen - 2;
567 case CI_COMPRESSTYPE:
568 if (go->neg_vj || no.neg_vj ||
569 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS))
574 if (go->neg_addr && go->old_addrs || no.old_addrs
575 || cilen != CILEN_ADDRS)
581 if (ciaddr1 && go->accept_local)
582 try.ouraddr = ciaddr1;
585 if (ciaddr2 && go->accept_remote)
586 try.hisaddr = ciaddr2;
590 if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR)
596 if (ciaddr1 && go->accept_local)
597 try.ouraddr = ciaddr1;
606 /* If there is still anything left, this packet is bad. */
611 * OK, the Nak is good. Now we can update state.
613 if (f->state != OPENED)
619 IPCPDEBUG((LOG_INFO, "ipcp_nakci: received bad Nak!"));
625 * ipcp_rejci - Reject some of our CIs.
628 ipcp_rejci(f, p, len)
633 ipcp_options *go = &ipcp_gotoptions[f->unit];
634 u_char cimaxslotindex, ciflag, cilen;
637 ipcp_options try; /* options to request next time */
641 * Any Rejected CIs must be in exactly the same order that we sent.
642 * Check packet length and CI length at each step.
643 * If we find any deviations, then this packet is bad.
645 #define REJCIADDR(opt, neg, old, val1, val2) \
647 len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
655 /* Check rejected value. */ \
656 if (cilong != val1) \
661 /* Check rejected value. */ \
662 if (cilong != val2) \
668 #define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
670 p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
675 GETSHORT(cishort, p); \
676 /* Check rejected value. */ \
677 if (cishort != val) \
680 GETCHAR(cimaxslotindex, p); \
681 if (cimaxslotindex != maxslot) \
683 GETCHAR(ciflag, p); \
684 if (ciflag != cflag) \
690 REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
691 go->old_addrs, go->ouraddr, go->hisaddr);
693 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
694 go->maxslotindex, go->cflag);
697 * If there are any remaining CIs, then this packet is bad.
702 * Now we can update state.
704 if (f->state != OPENED)
709 IPCPDEBUG((LOG_INFO, "ipcp_rejci: received bad Reject!"));
715 * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
717 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
718 * appropriately. If reject_if_disagree is non-zero, doesn't return
719 * CONFNAK; returns CONFREJ if it can't return CONFACK.
722 ipcp_reqci(f, inp, len, reject_if_disagree)
724 u_char *inp; /* Requested CIs */
725 int *len; /* Length of requested CIs */
726 int reject_if_disagree;
728 ipcp_options *wo = &ipcp_wantoptions[f->unit];
729 ipcp_options *ho = &ipcp_hisoptions[f->unit];
730 ipcp_options *ao = &ipcp_allowoptions[f->unit];
731 ipcp_options *go = &ipcp_gotoptions[f->unit];
732 u_char *cip, *next; /* Pointer to current and next CIs */
733 u_short cilen, citype; /* Parsed len, type */
734 u_short cishort; /* Parsed short value */
735 u_long tl, ciaddr1, ciaddr2;/* Parsed address values */
736 int rc = CONFACK; /* Final packet return code */
737 int orc; /* Individual option return code */
738 u_char *p; /* Pointer to next char to parse */
739 u_char *ucp = inp; /* Pointer to current output char */
740 int l = *len; /* Length left */
741 u_char maxslotindex, cflag;
744 * Reset all his options.
746 BZERO(ho, sizeof(*ho));
749 * Process all his options.
753 orc = CONFACK; /* Assume success */
754 cip = p = next; /* Remember begining of CI */
755 if (l < 2 || /* Not enough data for CI header or */
756 p[1] < 2 || /* CI length too small or */
757 p[1] > l) { /* CI length too big? */
758 IPCPDEBUG((LOG_INFO, "ipcp_reqci: bad CI length!"));
759 orc = CONFREJ; /* Reject bad CI */
760 cilen = l; /* Reject till end of packet */
761 l = 0; /* Don't loop again */
764 GETCHAR(citype, p); /* Parse CI type */
765 GETCHAR(cilen, p); /* Parse CI length */
766 l -= cilen; /* Adjust remaining length */
767 next += cilen; /* Step to next CI */
769 switch (citype) { /* Check CI type */
771 IPCPDEBUG((LOG_INFO, "ipcp: received ADDRS "));
773 cilen != CILEN_ADDRS) { /* Check CI length */
774 orc = CONFREJ; /* Reject CI */
779 * If he has no address, or if we both have his address but
780 * disagree about it, then NAK it with our idea.
781 * In particular, if we don't know his address, but he does,
784 GETLONG(tl, p); /* Parse source address (his) */
786 IPCPDEBUG((LOG_INFO, "(%s:", ip_ntoa(ciaddr1)));
787 if (ciaddr1 != wo->hisaddr
788 && (ciaddr1 == 0 || !wo->accept_remote)) {
790 if (!reject_if_disagree) {
791 DECPTR(sizeof (long), p);
792 tl = ntohl(wo->hisaddr);
798 * If he doesn't know our address, or if we both have our address
799 * but disagree about it, then NAK it with our idea.
801 GETLONG(tl, p); /* Parse desination address (ours) */
803 IPCPDEBUG((LOG_INFO, "%s)", ip_ntoa(ciaddr2)));
804 if (ciaddr2 != wo->ouraddr) {
805 if (ciaddr2 == 0 || !wo->accept_local) {
807 if (!reject_if_disagree) {
808 DECPTR(sizeof (long), p);
809 tl = ntohl(wo->ouraddr);
813 go->ouraddr = ciaddr2; /* accept peer's idea */
819 ho->hisaddr = ciaddr1;
820 ho->ouraddr = ciaddr2;
824 IPCPDEBUG((LOG_INFO, "ipcp: received ADDR "));
827 cilen != CILEN_ADDR) { /* Check CI length */
828 orc = CONFREJ; /* Reject CI */
833 * If he has no address, or if we both have his address but
834 * disagree about it, then NAK it with our idea.
835 * In particular, if we don't know his address, but he does,
838 GETLONG(tl, p); /* Parse source address (his) */
840 IPCPDEBUG((LOG_INFO, "(%s)", ip_ntoa(ciaddr1)));
841 if (ciaddr1 != wo->hisaddr
842 && (ciaddr1 == 0 || !wo->accept_remote)) {
844 if (!reject_if_disagree) {
845 DECPTR(sizeof (long), p);
846 tl = ntohl(wo->hisaddr);
852 ho->hisaddr = ciaddr1;
855 case CI_COMPRESSTYPE:
856 IPCPDEBUG((LOG_INFO, "ipcp: received COMPRESSTYPE "));
858 (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
862 GETSHORT(cishort, p);
863 IPCPDEBUG((LOG_INFO, "(%d)", cishort));
865 if (!(cishort == IPCP_VJ_COMP ||
866 (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
872 ho->vj_protocol = cishort;
873 if (cilen == CILEN_VJ) {
874 GETCHAR(maxslotindex, p);
875 if (maxslotindex > ao->maxslotindex) {
877 if (!reject_if_disagree){
879 PUTCHAR(ao->maxslotindex, p);
883 if (cflag && !ao->cflag) {
885 if (!reject_if_disagree){
887 PUTCHAR(wo->cflag, p);
890 ho->maxslotindex = maxslotindex;
891 ho->cflag = wo->cflag;
894 ho->maxslotindex = MAX_STATES - 1;
905 IPCPDEBUG((LOG_INFO, " (%s)\n", CODENAME(orc)));
907 if (orc == CONFACK && /* Good CI */
908 rc != CONFACK) /* but prior CI wasnt? */
909 continue; /* Don't send this one */
911 if (orc == CONFNAK) { /* Nak this CI? */
912 if (reject_if_disagree) /* Getting fed up with sending NAKs? */
913 orc = CONFREJ; /* Get tough if so */
915 if (rc == CONFREJ) /* Rejecting prior CI? */
916 continue; /* Don't send this one */
917 if (rc == CONFACK) { /* Ack'd all prior CIs? */
918 rc = CONFNAK; /* Not anymore... */
919 ucp = inp; /* Backup */
924 if (orc == CONFREJ && /* Reject this CI */
925 rc != CONFREJ) { /* but no prior ones? */
927 ucp = inp; /* Backup */
930 /* Need to move CI? */
932 BCOPY(cip, ucp, cilen); /* Move it */
934 /* Update output pointer */
939 * If we aren't rejecting this packet, and we want to negotiate
940 * their address, and they didn't send their address, then we
941 * send a NAK with a CI_ADDR option appended. We assume the
942 * input buffer is long enough that we can append the extra
945 if (rc != CONFREJ && !ho->neg_addr &&
946 wo->req_addr && !reject_if_disagree) {
949 ucp = inp; /* reset pointer */
950 wo->req_addr = 0; /* don't ask again */
952 PUTCHAR(CI_ADDR, ucp);
953 PUTCHAR(CILEN_ADDR, ucp);
954 tl = ntohl(wo->hisaddr);
958 *len = ucp - inp; /* Compute output length */
959 IPCPDEBUG((LOG_INFO, "ipcp: returning Configure-%s", CODENAME(rc)));
960 return (rc); /* Return final code */
965 * ipcp_up - IPCP has come UP.
967 * Configure the IP network interface appropriately and bring it up.
974 ipcp_options *ho = &ipcp_hisoptions[f->unit];
975 ipcp_options *go = &ipcp_gotoptions[f->unit];
977 IPCPDEBUG((LOG_INFO, "ipcp: up"));
978 go->default_route = 0;
982 * We must have a non-zero IP address for both ends of the link.
985 ho->hisaddr = ipcp_wantoptions[f->unit].hisaddr;
987 if (ho->hisaddr == 0) {
988 syslog(LOG_ERR, "Could not determine remote IP address");
992 if (go->ouraddr == 0) {
993 syslog(LOG_ERR, "Could not determine local IP address");
999 * Check that the peer is allowed to use the IP address it wants.
1001 if (!auth_ip_addr(f->unit, ho->hisaddr)) {
1002 syslog(LOG_ERR, "Peer is not authorized to use remote address %s",
1003 ip_ntoa(ho->hisaddr));
1004 ipcp_close(f->unit);
1008 syslog(LOG_NOTICE, "local IP address %s", ip_ntoa(go->ouraddr));
1009 syslog(LOG_NOTICE, "remote IP address %s", ip_ntoa(ho->hisaddr));
1012 * Set IP addresses and (if specified) netmask.
1014 mask = GetMask(go->ouraddr);
1015 if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
1016 IPCPDEBUG((LOG_WARNING, "sifaddr failed"));
1017 ipcp_close(f->unit);
1021 /* set tcp compression */
1022 sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
1024 /* bring the interface up for IP */
1025 if (!sifup(f->unit)) {
1026 IPCPDEBUG((LOG_WARNING, "sifup failed"));
1027 ipcp_close(f->unit);
1031 /* assign a default route through the interface if required */
1032 if (ipcp_wantoptions[f->unit].default_route)
1033 if (sifdefaultroute(f->unit, ho->hisaddr))
1034 go->default_route = 1;
1036 /* Make a proxy ARP entry if requested. */
1037 if (ipcp_wantoptions[f->unit].proxy_arp)
1038 if (sifproxyarp(f->unit, ho->hisaddr))
1042 * Execute the ip-up script, like this:
1043 * /etc/ppp/ip-up interface tty speed local-IP remote-IP
1045 ipcp_script(f, _PATH_IPUP);
1051 * ipcp_down - IPCP has gone DOWN.
1053 * Take the IP network interface down, clear its addresses
1054 * and delete routes through it.
1060 u_long ouraddr, hisaddr;
1062 IPCPDEBUG((LOG_INFO, "ipcp: down"));
1064 ouraddr = ipcp_gotoptions[f->unit].ouraddr;
1065 hisaddr = ipcp_hisoptions[f->unit].hisaddr;
1066 if (ipcp_gotoptions[f->unit].proxy_arp)
1067 cifproxyarp(f->unit, hisaddr);
1068 if (ipcp_gotoptions[f->unit].default_route)
1069 cifdefaultroute(f->unit, hisaddr);
1071 cifaddr(f->unit, ouraddr, hisaddr);
1073 /* Execute the ip-down script */
1074 ipcp_script(f, _PATH_IPDOWN);
1079 * ipcp_script - Execute a script with arguments
1080 * interface-name tty-name speed local-IP remote-IP.
1083 ipcp_script(f, script)
1087 char strspeed[32], strlocal[32], strremote[32];
1090 sprintf(strspeed, "%d", baud_rate);
1091 strcpy(strlocal, ip_ntoa(ipcp_gotoptions[f->unit].ouraddr));
1092 strcpy(strremote, ip_ntoa(ipcp_hisoptions[f->unit].hisaddr));
1099 argv[5] = strremote;
1101 run_program(script, argv, 0);
1105 * ipcp_printpkt - print the contents of an IPCP packet.
1107 char *ipcp_codenames[] = {
1108 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
1109 "TermReq", "TermAck", "CodeRej"
1113 ipcp_printpkt(p, plen, printer, arg)
1119 int code, id, len, olen;
1120 u_char *pstart, *optend;
1124 if (plen < HEADERLEN)
1130 if (len < HEADERLEN || len > plen)
1133 if (code >= 1 && code <= sizeof(ipcp_codenames) / sizeof(char *))
1134 printer(arg, " %s", ipcp_codenames[code-1]);
1136 printer(arg, " code=0x%x", code);
1137 printer(arg, " id=0x%x", id);
1144 /* print option list */
1149 if (olen < 2 || olen > len) {
1157 if (olen == CILEN_ADDRS) {
1160 printer(arg, "addrs %s", ip_ntoa(cilong));
1162 printer(arg, " %s", ip_ntoa(cilong));
1165 case CI_COMPRESSTYPE:
1166 if (olen >= CILEN_COMPRESS) {
1168 GETSHORT(cishort, p);
1169 printer(arg, "compress ");
1174 case IPCP_VJ_COMP_OLD:
1175 printer(arg, "old-VJ");
1178 printer(arg, "0x%x", cishort);
1183 if (olen == CILEN_ADDR) {
1186 printer(arg, "addr %s", ip_ntoa(cilong));
1190 while (p < optend) {
1192 printer(arg, " %.2x", code);
1199 /* print the rest of the bytes in the packet */
1200 for (; len > 0; --len) {
1202 printer(arg, " %.2x", code);