2 ipv6cp.c - PPP IPV6 Control Protocol.
3 Copyright (C) 1999 Tommi Komulainen <Tommi.Komulainen@iki.fi>
5 Redistribution and use in source and binary forms are permitted
6 provided that the above copyright notice and this paragraph are
7 duplicated in all such forms. The name of the author may not be
8 used to endorse or promote products derived from this software
9 without specific prior written permission.
10 THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
11 IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
12 WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
15 /* Original version, based on RFC2023 :
17 Copyright (c) 1995, 1996, 1997 Francis.Dupont@inria.fr, INRIA Rocquencourt,
18 Alain.Durand@imag.fr, IMAG,
19 Jean-Luc.Richier@imag.fr, IMAG-LSR.
21 Copyright (c) 1998, 1999 Francis.Dupont@inria.fr, GIE DYADE,
22 Alain.Durand@imag.fr, IMAG,
23 Jean-Luc.Richier@imag.fr, IMAG-LSR.
25 Ce travail a été fait au sein du GIE DYADE (Groupement d'Intérêt
26 Économique ayant pour membres BULL S.A. et l'INRIA).
28 Ce logiciel informatique est disponible aux conditions
29 usuelles dans la recherche, c'est-à-dire qu'il peut
30 être utilisé, copié, modifié, distribué à l'unique
31 condition que ce texte soit conservé afin que
32 l'origine de ce logiciel soit reconnue.
34 Le nom de l'Institut National de Recherche en Informatique
35 et en Automatique (INRIA), de l'IMAG, ou d'une personne morale
36 ou physique ayant participé à l'élaboration de ce logiciel ne peut
37 être utilisé sans son accord préalable explicite.
39 Ce logiciel est fourni tel quel sans aucune garantie,
40 support ou responsabilité d'aucune sorte.
41 Ce logiciel est dérivé de sources d'origine
42 "University of California at Berkeley" et
43 "Digital Equipment Corporation" couvertes par des copyrights.
45 L'Institut d'Informatique et de Mathématiques Appliquées de Grenoble (IMAG)
46 est une fédération d'unités mixtes de recherche du CNRS, de l'Institut National
47 Polytechnique de Grenoble et de l'Université Joseph Fourier regroupant
48 sept laboratoires dont le laboratoire Logiciels, Systèmes, Réseaux (LSR).
50 This work has been done in the context of GIE DYADE (joint R & D venture
51 between BULL S.A. and INRIA).
53 This software is available with usual "research" terms
54 with the aim of retain credits of the software.
55 Permission to use, copy, modify and distribute this software for any
56 purpose and without fee is hereby granted, provided that the above
57 copyright notice and this permission notice appear in all copies,
58 and the name of INRIA, IMAG, or any contributor not be used in advertising
59 or publicity pertaining to this material without the prior explicit
60 permission. The software is provided "as is" without any
61 warranties, support or liabilities of any kind.
62 This software is derived from source code from
63 "University of California at Berkeley" and
64 "Digital Equipment Corporation" protected by copyrights.
66 Grenoble's Institute of Computer Science and Applied Mathematics (IMAG)
67 is a federation of seven research units funded by the CNRS, National
68 Polytechnic Institute of Grenoble and University Joseph Fourier.
69 The research unit in Software, Systems, Networks (LSR) is member of IMAG.
76 * ipcp.c - PPP IP Control Protocol.
78 * Copyright (c) 1989 Carnegie Mellon University.
79 * All rights reserved.
81 * Redistribution and use in source and binary forms are permitted
82 * provided that the above copyright notice and this paragraph are
83 * duplicated in all such forms and that any documentation,
84 * advertising materials, and other materials related to such
85 * distribution and use acknowledge that the software was developed
86 * by Carnegie Mellon University. The name of the
87 * University may not be used to endorse or promote products derived
88 * from this software without specific prior written permission.
89 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
90 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
91 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
93 * $Id: ipv6cp.c,v 1.13 2001/03/08 05:11:12 paulus Exp $
96 #define RCSID "$Id: ipv6cp.c,v 1.13 2001/03/08 05:11:12 paulus Exp $"
101 * Proxy Neighbour Discovery.
103 * Better defines for selecting the ordering of
104 * interface up / set address. (currently checks for __linux__,
105 * since SVR4 && (SNI || __USLC__) didn't work properly)
112 #include <sys/param.h>
113 #include <sys/types.h>
114 #include <sys/socket.h>
115 #include <netinet/in.h>
116 #include <arpa/inet.h>
123 #include "pathnames.h"
125 static const char rcsid[] = RCSID;
128 ipv6cp_options ipv6cp_wantoptions[NUM_PPP]; /* Options that we want to request */
129 ipv6cp_options ipv6cp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
130 ipv6cp_options ipv6cp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
131 ipv6cp_options ipv6cp_hisoptions[NUM_PPP]; /* Options that we ack'd */
132 int no_ifaceid_neg = 0;
135 static int ipv6cp_is_up;
138 * Callbacks for fsm code. (CI = Configuration Information)
140 static void ipv6cp_resetci __P((fsm *)); /* Reset our CI */
141 static int ipv6cp_cilen __P((fsm *)); /* Return length of our CI */
142 static void ipv6cp_addci __P((fsm *, u_char *, int *)); /* Add our CI */
143 static int ipv6cp_ackci __P((fsm *, u_char *, int)); /* Peer ack'd our CI */
144 static int ipv6cp_nakci __P((fsm *, u_char *, int)); /* Peer nak'd our CI */
145 static int ipv6cp_rejci __P((fsm *, u_char *, int)); /* Peer rej'd our CI */
146 static int ipv6cp_reqci __P((fsm *, u_char *, int *, int)); /* Rcv CI */
147 static void ipv6cp_up __P((fsm *)); /* We're UP */
148 static void ipv6cp_down __P((fsm *)); /* We're DOWN */
149 static void ipv6cp_finished __P((fsm *)); /* Don't need lower layer */
151 fsm ipv6cp_fsm[NUM_PPP]; /* IPV6CP fsm structure */
153 static fsm_callbacks ipv6cp_callbacks = { /* IPV6CP callback routines */
154 ipv6cp_resetci, /* Reset our Configuration Information */
155 ipv6cp_cilen, /* Length of our Configuration Information */
156 ipv6cp_addci, /* Add our Configuration Information */
157 ipv6cp_ackci, /* ACK our Configuration Information */
158 ipv6cp_nakci, /* NAK our Configuration Information */
159 ipv6cp_rejci, /* Reject our Configuration Information */
160 ipv6cp_reqci, /* Request peer's Configuration Information */
161 ipv6cp_up, /* Called when fsm reaches OPENED state */
162 ipv6cp_down, /* Called when fsm leaves OPENED state */
163 NULL, /* Called when we want the lower layer up */
164 ipv6cp_finished, /* Called when we want the lower layer down */
165 NULL, /* Called when Protocol-Reject received */
166 NULL, /* Retransmission is necessary */
167 NULL, /* Called to handle protocol-specific codes */
168 "IPV6CP" /* String name of protocol */
172 * Command-line options.
174 static int setifaceid __P((char **arg));
175 static void printifaceid __P((option_t *,
176 void (*)(void *, char *, ...), void *));
178 static option_t ipv6cp_option_list[] = {
179 { "ipv6", o_special, (void *)setifaceid,
180 "Set interface identifiers for IPV6",
181 OPT_A2PRINTER, (void *)printifaceid },
183 { "+ipv6", o_bool, &ipv6cp_protent.enabled_flag,
184 "Enable IPv6 and IPv6CP", OPT_PRIO | 1 },
185 { "noipv6", o_bool, &ipv6cp_protent.enabled_flag,
186 "Disable IPv6 and IPv6CP", OPT_PRIOSUB },
187 { "-ipv6", o_bool, &ipv6cp_protent.enabled_flag,
188 "Disable IPv6 and IPv6CP", OPT_PRIOSUB | OPT_ALIAS },
190 { "ipv6cp-accept-local", o_bool, &ipv6cp_allowoptions[0].accept_local,
191 "Accept peer's interface identifier for us", 1 },
193 { "ipv6cp-use-ipaddr", o_bool, &ipv6cp_allowoptions[0].use_ip,
194 "Use (default) IPv4 address as interface identifier", 1 },
197 { "ipv6cp-use-persistent", o_bool, &ipv6cp_wantoptions[0].use_persistent,
198 "Use uniquely-available persistent value for link local address", 1 },
199 #endif /* defined(SOL2) */
201 { "ipv6cp-restart", o_int, &ipv6cp_fsm[0].timeouttime,
202 "Set timeout for IPv6CP", OPT_PRIO },
203 { "ipv6cp-max-terminate", o_int, &ipv6cp_fsm[0].maxtermtransmits,
204 "Set max #xmits for term-reqs", OPT_PRIO },
205 { "ipv6cp-max-configure", o_int, &ipv6cp_fsm[0].maxconfreqtransmits,
206 "Set max #xmits for conf-reqs", OPT_PRIO },
207 { "ipv6cp-max-failure", o_int, &ipv6cp_fsm[0].maxnakloops,
208 "Set max #conf-naks for IPv6CP", OPT_PRIO },
215 * Protocol entry points from main code.
217 static void ipv6cp_init __P((int));
218 static void ipv6cp_open __P((int));
219 static void ipv6cp_close __P((int, char *));
220 static void ipv6cp_lowerup __P((int));
221 static void ipv6cp_lowerdown __P((int));
222 static void ipv6cp_input __P((int, u_char *, int));
223 static void ipv6cp_protrej __P((int));
224 static int ipv6cp_printpkt __P((u_char *, int,
225 void (*) __P((void *, char *, ...)), void *));
226 static void ipv6_check_options __P((void));
227 static int ipv6_demand_conf __P((int));
228 static int ipv6_active_pkt __P((u_char *, int));
230 struct protent ipv6cp_protent = {
250 static void ipv6cp_clear_addrs __P((int, eui64_t, eui64_t));
251 static void ipv6cp_script __P((char *));
252 static void ipv6cp_script_done __P((void *));
255 * Lengths of configuration options.
258 #define CILEN_COMPRESS 4 /* length for RFC2023 compress opt. */
259 #define CILEN_IFACEID 10 /* RFC2472, interface identifier */
261 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
262 (x) == CONFNAK ? "NAK" : "REJ")
265 * This state variable is used to ensure that we don't
266 * run an ipcp-up/down script while one is already running.
268 static enum script_state {
271 } ipv6cp_script_state;
272 static pid_t ipv6cp_script_pid;
275 * setifaceid - set the interface identifiers manually
281 char *comma, *arg, c;
282 ipv6cp_options *wo = &ipv6cp_wantoptions[0];
283 struct in6_addr addr;
284 static int prio_local, prio_remote;
286 #define VALIDID(a) ( (((a).s6_addr32[0] == 0) && ((a).s6_addr32[1] == 0)) && \
287 (((a).s6_addr32[2] != 0) || ((a).s6_addr32[3] != 0)) )
290 if ((comma = strchr(arg, ',')) == NULL)
291 comma = arg + strlen(arg);
294 * If comma first character, then no local identifier
300 if (inet_pton(AF_INET6, arg, &addr) == 0 || !VALIDID(addr)) {
301 option_error("Illegal interface identifier (local): %s", arg);
305 if (option_priority >= prio_local) {
306 eui64_copy(addr.s6_addr32[2], wo->ourid);
308 prio_local = option_priority;
314 * If comma last character, the no remote identifier
316 if (*comma != 0 && *++comma != '\0') {
317 if (inet_pton(AF_INET6, comma, &addr) == 0 || !VALIDID(addr)) {
318 option_error("Illegal interface identifier (remote): %s", comma);
321 if (option_priority >= prio_remote) {
322 eui64_copy(addr.s6_addr32[2], wo->hisid);
324 prio_remote = option_priority;
328 if (override_value("+ipv6", option_priority, option_source))
329 ipv6cp_protent.enabled_flag = 1;
334 printipaddr(opt, printer, arg)
336 void (*printer) __P((void *, char *, ...));
339 ipv6cp_options *wo = &ipv6cp_wantoptions[0];
342 printer(arg, "%s", llv6_ntoa(wo->ourid));
345 printer(arg, "%s", llv6_ntoa(wo->hisid));
349 * Make a string representation of a network address.
357 sprintf(b, "fe80::%s", eui64_ntoa(ifaceid));
363 * ipv6cp_init - Initialize IPV6CP.
369 fsm *f = &ipv6cp_fsm[unit];
370 ipv6cp_options *wo = &ipv6cp_wantoptions[unit];
371 ipv6cp_options *ao = &ipv6cp_allowoptions[unit];
374 f->protocol = PPP_IPV6CP;
375 f->callbacks = &ipv6cp_callbacks;
376 fsm_init(&ipv6cp_fsm[unit]);
378 memset(wo, 0, sizeof(*wo));
379 memset(ao, 0, sizeof(*ao));
381 wo->accept_local = 1;
388 wo->vj_protocol = IPV6CP_COMP;
395 * ipv6cp_open - IPV6CP is allowed to come up.
401 fsm_open(&ipv6cp_fsm[unit]);
406 * ipv6cp_close - Take IPV6CP down.
409 ipv6cp_close(unit, reason)
413 fsm_close(&ipv6cp_fsm[unit], reason);
418 * ipv6cp_lowerup - The lower layer is up.
424 fsm_lowerup(&ipv6cp_fsm[unit]);
429 * ipv6cp_lowerdown - The lower layer is down.
432 ipv6cp_lowerdown(unit)
435 fsm_lowerdown(&ipv6cp_fsm[unit]);
440 * ipv6cp_input - Input IPV6CP packet.
443 ipv6cp_input(unit, p, len)
448 fsm_input(&ipv6cp_fsm[unit], p, len);
453 * ipv6cp_protrej - A Protocol-Reject was received for IPV6CP.
455 * Pretend the lower layer went down, so we shut up.
461 fsm_lowerdown(&ipv6cp_fsm[unit]);
466 * ipv6cp_resetci - Reset our CI.
472 ipv6cp_options *wo = &ipv6cp_wantoptions[f->unit];
473 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
475 wo->req_ifaceid = wo->neg_ifaceid && ipv6cp_allowoptions[f->unit].neg_ifaceid;
477 if (!wo->opt_local) {
478 eui64_magic_nz(wo->ourid);
482 eui64_zero(go->hisid); /* last proposed interface identifier */
487 * ipv6cp_cilen - Return length of our CI.
493 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
495 #define LENCIVJ(neg) (neg ? CILEN_COMPRESS : 0)
496 #define LENCIIFACEID(neg) (neg ? CILEN_IFACEID : 0)
498 return (LENCIIFACEID(go->neg_ifaceid) +
499 LENCIVJ(go->neg_vj));
504 * ipv6cp_addci - Add our desired CIs to a packet.
507 ipv6cp_addci(f, ucp, lenp)
512 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
515 #define ADDCIVJ(opt, neg, val) \
517 int vjlen = CILEN_COMPRESS; \
518 if (len >= vjlen) { \
520 PUTCHAR(vjlen, ucp); \
521 PUTSHORT(val, ucp); \
527 #define ADDCIIFACEID(opt, neg, val1) \
529 int idlen = CILEN_IFACEID; \
530 if (len >= idlen) { \
532 PUTCHAR(idlen, ucp); \
533 eui64_put(val1, ucp); \
539 ADDCIIFACEID(CI_IFACEID, go->neg_ifaceid, go->ourid);
541 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol);
548 * ipv6cp_ackci - Ack our CIs.
555 ipv6cp_ackci(f, p, len)
560 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
561 u_short cilen, citype, cishort;
565 * CIs must be in exactly the same order that we sent...
566 * Check packet length and CI length at each step.
567 * If we find any deviations, then this packet is bad.
570 #define ACKCIVJ(opt, neg, val) \
572 int vjlen = CILEN_COMPRESS; \
573 if ((len -= vjlen) < 0) \
575 GETCHAR(citype, p); \
577 if (cilen != vjlen || \
580 GETSHORT(cishort, p); \
581 if (cishort != val) \
585 #define ACKCIIFACEID(opt, neg, val1) \
587 int idlen = CILEN_IFACEID; \
588 if ((len -= idlen) < 0) \
590 GETCHAR(citype, p); \
592 if (cilen != idlen || \
595 eui64_get(ifaceid, p); \
596 if (! eui64_equals(val1, ifaceid)) \
600 ACKCIIFACEID(CI_IFACEID, go->neg_ifaceid, go->ourid);
602 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol);
605 * If there are any remaining CIs, then this packet is bad.
612 IPV6CPDEBUG(("ipv6cp_ackci: received bad Ack!"));
617 * ipv6cp_nakci - Peer has sent a NAK for some of our CIs.
618 * This should not modify any state if the Nak is bad
619 * or if IPV6CP is in the OPENED state.
626 ipv6cp_nakci(f, p, len)
631 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
632 u_char citype, cilen, *next;
635 ipv6cp_options no; /* options we've seen Naks for */
636 ipv6cp_options try; /* options to request next time */
638 BZERO(&no, sizeof(no));
642 * Any Nak'd CIs must be in exactly the same order that we sent.
643 * Check packet length and CI length at each step.
644 * If we find any deviations, then this packet is bad.
646 #define NAKCIIFACEID(opt, neg, code) \
648 len >= (cilen = CILEN_IFACEID) && \
653 eui64_get(ifaceid, p); \
658 #define NAKCIVJ(opt, neg, code) \
660 ((cilen = p[1]) == CILEN_COMPRESS) && \
665 GETSHORT(cishort, p); \
671 * Accept the peer's idea of {our,his} interface identifier, if different
672 * from our idea, only if the accept_{local,remote} flag is set.
674 NAKCIIFACEID(CI_IFACEID, neg_ifaceid,
675 if (go->accept_local) {
676 while (eui64_iszero(ifaceid) ||
677 eui64_equals(ifaceid, go->hisid)) /* bad luck */
678 eui64_magic(ifaceid);
680 IPV6CPDEBUG(("local LL address %s", llv6_ntoa(ifaceid)));
685 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
687 if (cishort == IPV6CP_COMP) {
688 try.vj_protocol = cishort;
695 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
703 * There may be remaining CIs, if the peer is requesting negotiation
704 * on an option that we didn't include in our request packet.
705 * If they want to negotiate about interface identifier, we comply.
706 * If they want us to ask for compression, we refuse.
708 while (len > CILEN_VOID) {
711 if( (len -= cilen) < 0 )
713 next = p + cilen - 2;
716 case CI_COMPRESSTYPE:
717 if (go->neg_vj || no.neg_vj ||
718 (cilen != CILEN_COMPRESS))
723 if (go->neg_ifaceid || no.neg_ifaceid || cilen != CILEN_IFACEID)
726 eui64_get(ifaceid, p);
727 if (go->accept_local) {
728 while (eui64_iszero(ifaceid) ||
729 eui64_equals(ifaceid, go->hisid)) /* bad luck */
730 eui64_magic(ifaceid);
739 /* If there is still anything left, this packet is bad. */
744 * OK, the Nak is good. Now we can update state.
746 if (f->state != OPENED)
752 IPV6CPDEBUG(("ipv6cp_nakci: received bad Nak!"));
758 * ipv6cp_rejci - Reject some of our CIs.
761 ipv6cp_rejci(f, p, len)
766 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
770 ipv6cp_options try; /* options to request next time */
774 * Any Rejected CIs must be in exactly the same order that we sent.
775 * Check packet length and CI length at each step.
776 * If we find any deviations, then this packet is bad.
778 #define REJCIIFACEID(opt, neg, val1) \
780 len >= (cilen = CILEN_IFACEID) && \
785 eui64_get(ifaceid, p); \
786 /* Check rejected value. */ \
787 if (! eui64_equals(ifaceid, val1)) \
792 #define REJCIVJ(opt, neg, val) \
794 p[1] == CILEN_COMPRESS && \
799 GETSHORT(cishort, p); \
800 /* Check rejected value. */ \
801 if (cishort != val) \
806 REJCIIFACEID(CI_IFACEID, neg_ifaceid, go->ourid);
808 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol);
811 * If there are any remaining CIs, then this packet is bad.
816 * Now we can update state.
818 if (f->state != OPENED)
823 IPV6CPDEBUG(("ipv6cp_rejci: received bad Reject!"));
829 * ipv6cp_reqci - Check the peer's requested CIs and send appropriate response.
831 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
832 * appropriately. If reject_if_disagree is non-zero, doesn't return
833 * CONFNAK; returns CONFREJ if it can't return CONFACK.
836 ipv6cp_reqci(f, inp, len, reject_if_disagree)
838 u_char *inp; /* Requested CIs */
839 int *len; /* Length of requested CIs */
840 int reject_if_disagree;
842 ipv6cp_options *wo = &ipv6cp_wantoptions[f->unit];
843 ipv6cp_options *ho = &ipv6cp_hisoptions[f->unit];
844 ipv6cp_options *ao = &ipv6cp_allowoptions[f->unit];
845 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
846 u_char *cip, *next; /* Pointer to current and next CIs */
847 u_short cilen, citype; /* Parsed len, type */
848 u_short cishort; /* Parsed short value */
849 eui64_t ifaceid; /* Parsed interface identifier */
850 int rc = CONFACK; /* Final packet return code */
851 int orc; /* Individual option return code */
852 u_char *p; /* Pointer to next char to parse */
853 u_char *ucp = inp; /* Pointer to current output char */
854 int l = *len; /* Length left */
857 * Reset all his options.
859 BZERO(ho, sizeof(*ho));
862 * Process all his options.
866 orc = CONFACK; /* Assume success */
867 cip = p = next; /* Remember begining of CI */
868 if (l < 2 || /* Not enough data for CI header or */
869 p[1] < 2 || /* CI length too small or */
870 p[1] > l) { /* CI length too big? */
871 IPV6CPDEBUG(("ipv6cp_reqci: bad CI length!"));
872 orc = CONFREJ; /* Reject bad CI */
873 cilen = l; /* Reject till end of packet */
874 l = 0; /* Don't loop again */
877 GETCHAR(citype, p); /* Parse CI type */
878 GETCHAR(cilen, p); /* Parse CI length */
879 l -= cilen; /* Adjust remaining length */
880 next += cilen; /* Step to next CI */
882 switch (citype) { /* Check CI type */
884 IPV6CPDEBUG(("ipv6cp: received interface identifier "));
886 if (!ao->neg_ifaceid ||
887 cilen != CILEN_IFACEID) { /* Check CI length */
888 orc = CONFREJ; /* Reject CI */
893 * If he has no interface identifier, or if we both have same
894 * identifier then NAK it with new idea.
895 * In particular, if we don't know his identifier, but he does,
898 eui64_get(ifaceid, p);
899 IPV6CPDEBUG(("(%s)", llv6_ntoa(ifaceid)));
900 if (eui64_iszero(ifaceid) && eui64_iszero(go->ourid)) {
901 orc = CONFREJ; /* Reject CI */
904 if (!eui64_iszero(wo->hisid) &&
905 !eui64_equals(ifaceid, wo->hisid) &&
906 eui64_iszero(go->hisid)) {
911 DECPTR(sizeof(ifaceid), p);
912 eui64_put(ifaceid, p);
914 if (eui64_iszero(ifaceid) || eui64_equals(ifaceid, go->ourid)) {
916 if (eui64_iszero(go->hisid)) /* first time, try option */
918 while (eui64_iszero(ifaceid) ||
919 eui64_equals(ifaceid, go->ourid)) /* bad luck */
920 eui64_magic(ifaceid);
922 DECPTR(sizeof(ifaceid), p);
923 eui64_put(ifaceid, p);
930 case CI_COMPRESSTYPE:
931 IPV6CPDEBUG(("ipv6cp: received COMPRESSTYPE "));
933 (cilen != CILEN_COMPRESS)) {
937 GETSHORT(cishort, p);
938 IPV6CPDEBUG(("(%d)", cishort));
941 if (!(cishort == IPV6CP_COMP)) {
947 ho->vj_protocol = cishort;
960 IPV6CPDEBUG((" (%s)\n", CODENAME(orc)));
962 if (orc == CONFACK && /* Good CI */
963 rc != CONFACK) /* but prior CI wasnt? */
964 continue; /* Don't send this one */
966 if (orc == CONFNAK) { /* Nak this CI? */
967 if (reject_if_disagree) /* Getting fed up with sending NAKs? */
968 orc = CONFREJ; /* Get tough if so */
970 if (rc == CONFREJ) /* Rejecting prior CI? */
971 continue; /* Don't send this one */
972 if (rc == CONFACK) { /* Ack'd all prior CIs? */
973 rc = CONFNAK; /* Not anymore... */
974 ucp = inp; /* Backup */
979 if (orc == CONFREJ && /* Reject this CI */
980 rc != CONFREJ) { /* but no prior ones? */
982 ucp = inp; /* Backup */
985 /* Need to move CI? */
987 BCOPY(cip, ucp, cilen); /* Move it */
989 /* Update output pointer */
994 * If we aren't rejecting this packet, and we want to negotiate
995 * their identifier and they didn't send their identifier, then we
996 * send a NAK with a CI_IFACEID option appended. We assume the
997 * input buffer is long enough that we can append the extra
1000 if (rc != CONFREJ && !ho->neg_ifaceid &&
1001 wo->req_ifaceid && !reject_if_disagree) {
1002 if (rc == CONFACK) {
1004 ucp = inp; /* reset pointer */
1005 wo->req_ifaceid = 0; /* don't ask again */
1007 PUTCHAR(CI_IFACEID, ucp);
1008 PUTCHAR(CILEN_IFACEID, ucp);
1009 eui64_put(wo->hisid, ucp);
1012 *len = ucp - inp; /* Compute output length */
1013 IPV6CPDEBUG(("ipv6cp: returning Configure-%s", CODENAME(rc)));
1014 return (rc); /* Return final code */
1019 * ipv6_check_options - check that any IP-related options are OK,
1020 * and assign appropriate defaults.
1023 ipv6_check_options()
1025 ipv6cp_options *wo = &ipv6cp_wantoptions[0];
1029 * Persistent link-local id is only used when user has not explicitly
1030 * configure/hard-code the id
1032 if ((wo->use_persistent) && (!wo->opt_local) && (!wo->opt_remote)) {
1035 * On systems where there are no Ethernet interfaces used, there
1036 * may be other ways to obtain a persistent id. Right now, it
1037 * will fall back to using magic [see eui64_magic] below when
1038 * an EUI-48 from MAC address can't be obtained. Other possibilities
1039 * include obtaining EEPROM serial numbers, or some other unique
1040 * yet persistent number. On Sparc platforms, this is possible,
1041 * but too bad there's no standards yet for x86 machines.
1043 if (ether_to_eui64(&wo->ourid)) {
1049 if (!wo->opt_local) { /* init interface identifier */
1050 if (wo->use_ip && eui64_iszero(wo->ourid)) {
1051 eui64_setlo32(wo->ourid, ntohl(ipcp_wantoptions[0].ouraddr));
1052 if (!eui64_iszero(wo->ourid))
1056 while (eui64_iszero(wo->ourid))
1057 eui64_magic(wo->ourid);
1060 if (!wo->opt_remote) {
1061 if (wo->use_ip && eui64_iszero(wo->hisid)) {
1062 eui64_setlo32(wo->hisid, ntohl(ipcp_wantoptions[0].hisaddr));
1063 if (!eui64_iszero(wo->hisid))
1068 if (demand && (eui64_iszero(wo->ourid) || eui64_iszero(wo->hisid))) {
1069 option_error("local/remote LL address required for demand-dialling\n");
1076 * ipv6_demand_conf - configure the interface as though
1077 * IPV6CP were up, for use with dial-on-demand.
1083 ipv6cp_options *wo = &ipv6cp_wantoptions[u];
1085 #if defined(__linux__) || defined(SOL2) || (defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1092 #endif /* defined(SOL2) */
1094 if (!sif6addr(u, wo->ourid, wo->hisid))
1096 #if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1100 if (!sifnpmode(u, PPP_IPV6, NPMODE_QUEUE))
1103 notice("ipv6_demand_conf");
1104 notice("local LL address %s", llv6_ntoa(wo->ourid));
1105 notice("remote LL address %s", llv6_ntoa(wo->hisid));
1112 * ipv6cp_up - IPV6CP has come UP.
1114 * Configure the IPv6 network interface appropriately and bring it up.
1120 ipv6cp_options *ho = &ipv6cp_hisoptions[f->unit];
1121 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
1122 ipv6cp_options *wo = &ipv6cp_wantoptions[f->unit];
1124 IPV6CPDEBUG(("ipv6cp: up"));
1127 * We must have a non-zero LL address for both ends of the link.
1129 if (!ho->neg_ifaceid)
1130 ho->hisid = wo->hisid;
1132 if(!no_ifaceid_neg) {
1133 if (eui64_iszero(ho->hisid)) {
1134 error("Could not determine remote LL address");
1135 ipv6cp_close(f->unit, "Could not determine remote LL address");
1138 if (eui64_iszero(go->ourid)) {
1139 error("Could not determine local LL address");
1140 ipv6cp_close(f->unit, "Could not determine local LL address");
1143 if (eui64_equals(go->ourid, ho->hisid)) {
1144 error("local and remote LL addresses are equal");
1145 ipv6cp_close(f->unit, "local and remote LL addresses are equal");
1149 script_setenv("LLLOCAL", llv6_ntoa(go->ourid), 0);
1150 script_setenv("LLREMOTE", llv6_ntoa(ho->hisid), 0);
1153 /* set tcp compression */
1154 sif6comp(f->unit, ho->neg_vj);
1158 * If we are doing dial-on-demand, the interface is already
1159 * configured, so we put out any saved-up packets, then set the
1160 * interface to pass IPv6 packets.
1163 if (! eui64_equals(go->ourid, wo->ourid) ||
1164 ! eui64_equals(ho->hisid, wo->hisid)) {
1165 if (! eui64_equals(go->ourid, wo->ourid))
1166 warn("Local LL address changed to %s",
1167 llv6_ntoa(go->ourid));
1168 if (! eui64_equals(ho->hisid, wo->hisid))
1169 warn("Remote LL address changed to %s",
1170 llv6_ntoa(ho->hisid));
1171 ipv6cp_clear_addrs(f->unit, go->ourid, ho->hisid);
1173 /* Set the interface to the new addresses */
1174 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1176 warn("sif6addr failed");
1177 ipv6cp_close(f->unit, "Interface configuration failed");
1182 demand_rexmit(PPP_IPV6);
1183 sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS);
1189 #if !defined(__linux__) && !defined(SOL2) && !(defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1190 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1192 warn("sif6addr failed");
1193 ipv6cp_close(f->unit, "Interface configuration failed");
1198 /* bring the interface up for IPv6 */
1200 if (!sif6up(f->unit)) {
1202 warn("sifup failed (IPV6)");
1203 ipv6cp_close(f->unit, "Interface configuration failed");
1207 if (!sifup(f->unit)) {
1209 warn("sifup failed (IPV6)");
1210 ipv6cp_close(f->unit, "Interface configuration failed");
1213 #endif /* defined(SOL2) */
1215 #if defined(__linux__) || defined(SOL2) || (defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1216 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1218 warn("sif6addr failed");
1219 ipv6cp_close(f->unit, "Interface configuration failed");
1223 sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS);
1225 notice("local LL address %s", llv6_ntoa(go->ourid));
1226 notice("remote LL address %s", llv6_ntoa(ho->hisid));
1229 np_up(f->unit, PPP_IPV6);
1233 * Execute the ipv6-up script, like this:
1234 * /etc/ppp/ipv6-up interface tty speed local-LL remote-LL
1236 if (ipv6cp_script_state == s_down && ipv6cp_script_pid == 0) {
1237 ipv6cp_script_state = s_up;
1238 ipv6cp_script(_PATH_IPV6UP);
1244 * ipv6cp_down - IPV6CP has gone DOWN.
1246 * Take the IPv6 network interface down, clear its addresses
1247 * and delete routes through it.
1253 IPV6CPDEBUG(("ipv6cp: down"));
1254 update_link_stats(f->unit);
1257 np_down(f->unit, PPP_IPV6);
1260 sif6comp(f->unit, 0);
1264 * If we are doing dial-on-demand, set the interface
1265 * to queue up outgoing packets (for now).
1268 sifnpmode(f->unit, PPP_IPV6, NPMODE_QUEUE);
1270 sifnpmode(f->unit, PPP_IPV6, NPMODE_DROP);
1271 #if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC)))
1276 #endif /* defined(SOL2) */
1278 ipv6cp_clear_addrs(f->unit,
1279 ipv6cp_gotoptions[f->unit].ourid,
1280 ipv6cp_hisoptions[f->unit].hisid);
1281 #if defined(__linux__) || (defined(SVR4) && (defined(SNI) || defined(__USLC)))
1286 /* Execute the ipv6-down script */
1287 if (ipv6cp_script_state == s_up && ipv6cp_script_pid == 0) {
1288 ipv6cp_script_state = s_down;
1289 ipv6cp_script(_PATH_IPV6DOWN);
1295 * ipv6cp_clear_addrs() - clear the interface addresses, routes,
1296 * proxy neighbour discovery entries, etc.
1299 ipv6cp_clear_addrs(unit, ourid, hisid)
1304 cif6addr(unit, ourid, hisid);
1309 * ipv6cp_finished - possibly shut down the lower layers.
1315 np_finished(f->unit, PPP_IPV6);
1320 * ipv6cp_script_done - called when the ipv6-up or ipv6-down script
1324 ipv6cp_script_done(arg)
1327 ipv6cp_script_pid = 0;
1328 switch (ipv6cp_script_state) {
1330 if (ipv6cp_fsm[0].state != OPENED) {
1331 ipv6cp_script_state = s_down;
1332 ipv6cp_script(_PATH_IPV6DOWN);
1336 if (ipv6cp_fsm[0].state == OPENED) {
1337 ipv6cp_script_state = s_up;
1338 ipv6cp_script(_PATH_IPV6UP);
1346 * ipv6cp_script - Execute a script with arguments
1347 * interface-name tty-name speed local-LL remote-LL.
1350 ipv6cp_script(script)
1353 char strspeed[32], strlocal[32], strremote[32];
1356 sprintf(strspeed, "%d", baud_rate);
1357 strcpy(strlocal, llv6_ntoa(ipv6cp_gotoptions[0].ourid));
1358 strcpy(strremote, llv6_ntoa(ipv6cp_hisoptions[0].hisid));
1365 argv[5] = strremote;
1369 ipv6cp_script_pid = run_program(script, argv, 0, ipv6cp_script_done, NULL);
1373 * ipv6cp_printpkt - print the contents of an IPV6CP packet.
1375 static char *ipv6cp_codenames[] = {
1376 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
1377 "TermReq", "TermAck", "CodeRej"
1381 ipv6cp_printpkt(p, plen, printer, arg)
1384 void (*printer) __P((void *, char *, ...));
1387 int code, id, len, olen;
1388 u_char *pstart, *optend;
1392 if (plen < HEADERLEN)
1398 if (len < HEADERLEN || len > plen)
1401 if (code >= 1 && code <= sizeof(ipv6cp_codenames) / sizeof(char *))
1402 printer(arg, " %s", ipv6cp_codenames[code-1]);
1404 printer(arg, " code=0x%x", code);
1405 printer(arg, " id=0x%x", id);
1412 /* print option list */
1417 if (olen < 2 || olen > len) {
1424 case CI_COMPRESSTYPE:
1425 if (olen >= CILEN_COMPRESS) {
1427 GETSHORT(cishort, p);
1428 printer(arg, "compress ");
1429 printer(arg, "0x%x", cishort);
1433 if (olen == CILEN_IFACEID) {
1435 eui64_get(ifaceid, p);
1436 printer(arg, "addr %s", llv6_ntoa(ifaceid));
1440 while (p < optend) {
1442 printer(arg, " %.2x", code);
1450 if (len > 0 && *p >= ' ' && *p < 0x7f) {
1452 print_string((char *)p, len, printer, arg);
1459 /* print the rest of the bytes in the packet */
1460 for (; len > 0; --len) {
1462 printer(arg, " %.2x", code);
1469 * ipv6_active_pkt - see if this IP packet is worth bringing the link up for.
1470 * We don't bring the link up for IP fragments or for TCP FIN packets
1473 #define IP6_HDRLEN 40 /* bytes */
1474 #define IP6_NHDR_FRAG 44 /* fragment IPv6 header */
1475 #define IPPROTO_TCP 6
1476 #define TCP_HDRLEN 20
1480 * We use these macros because the IP header may be at an odd address,
1481 * and some compilers might use word loads to get th_off or ip_hl.
1484 #define get_ip6nh(x) (((unsigned char *)(x))[6])
1485 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
1486 #define get_tcpflags(x) (((unsigned char *)(x))[13])
1489 ipv6_active_pkt(pkt, len)
1497 if (len < IP6_HDRLEN)
1499 if (get_ip6nh(pkt) == IP6_NHDR_FRAG)
1501 if (get_ip6nh(pkt) != IPPROTO_TCP)
1503 if (len < IP6_HDRLEN + TCP_HDRLEN)
1505 tcp = pkt + IP6_HDRLEN;
1506 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == IP6_HDRLEN + get_tcpoff(tcp) * 4)