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 1.16 2002/09/14 08:10:11 etbe Exp $
96 #define RCSID "$Id: ipv6cp.c,v 1.16 2002/09/14 08:10:11 etbe 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 },
196 #if defined(SOL2) || defined(__linux__)
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;
333 char *llv6_ntoa(eui64_t ifaceid);
336 printifaceid(opt, printer, arg)
338 void (*printer) __P((void *, char *, ...));
341 ipv6cp_options *wo = &ipv6cp_wantoptions[0];
344 printer(arg, "%s", llv6_ntoa(wo->ourid));
347 printer(arg, "%s", llv6_ntoa(wo->hisid));
351 * Make a string representation of a network address.
359 sprintf(b, "fe80::%s", eui64_ntoa(ifaceid));
365 * ipv6cp_init - Initialize IPV6CP.
371 fsm *f = &ipv6cp_fsm[unit];
372 ipv6cp_options *wo = &ipv6cp_wantoptions[unit];
373 ipv6cp_options *ao = &ipv6cp_allowoptions[unit];
376 f->protocol = PPP_IPV6CP;
377 f->callbacks = &ipv6cp_callbacks;
378 fsm_init(&ipv6cp_fsm[unit]);
380 memset(wo, 0, sizeof(*wo));
381 memset(ao, 0, sizeof(*ao));
383 wo->accept_local = 1;
390 wo->vj_protocol = IPV6CP_COMP;
397 * ipv6cp_open - IPV6CP is allowed to come up.
403 fsm_open(&ipv6cp_fsm[unit]);
408 * ipv6cp_close - Take IPV6CP down.
411 ipv6cp_close(unit, reason)
415 fsm_close(&ipv6cp_fsm[unit], reason);
420 * ipv6cp_lowerup - The lower layer is up.
426 fsm_lowerup(&ipv6cp_fsm[unit]);
431 * ipv6cp_lowerdown - The lower layer is down.
434 ipv6cp_lowerdown(unit)
437 fsm_lowerdown(&ipv6cp_fsm[unit]);
442 * ipv6cp_input - Input IPV6CP packet.
445 ipv6cp_input(unit, p, len)
450 fsm_input(&ipv6cp_fsm[unit], p, len);
455 * ipv6cp_protrej - A Protocol-Reject was received for IPV6CP.
457 * Pretend the lower layer went down, so we shut up.
463 fsm_lowerdown(&ipv6cp_fsm[unit]);
468 * ipv6cp_resetci - Reset our CI.
474 ipv6cp_options *wo = &ipv6cp_wantoptions[f->unit];
475 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
477 wo->req_ifaceid = wo->neg_ifaceid && ipv6cp_allowoptions[f->unit].neg_ifaceid;
479 if (!wo->opt_local) {
480 eui64_magic_nz(wo->ourid);
484 eui64_zero(go->hisid); /* last proposed interface identifier */
489 * ipv6cp_cilen - Return length of our CI.
495 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
497 #define LENCIVJ(neg) (neg ? CILEN_COMPRESS : 0)
498 #define LENCIIFACEID(neg) (neg ? CILEN_IFACEID : 0)
500 return (LENCIIFACEID(go->neg_ifaceid) +
501 LENCIVJ(go->neg_vj));
506 * ipv6cp_addci - Add our desired CIs to a packet.
509 ipv6cp_addci(f, ucp, lenp)
514 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
517 #define ADDCIVJ(opt, neg, val) \
519 int vjlen = CILEN_COMPRESS; \
520 if (len >= vjlen) { \
522 PUTCHAR(vjlen, ucp); \
523 PUTSHORT(val, ucp); \
529 #define ADDCIIFACEID(opt, neg, val1) \
531 int idlen = CILEN_IFACEID; \
532 if (len >= idlen) { \
534 PUTCHAR(idlen, ucp); \
535 eui64_put(val1, ucp); \
541 ADDCIIFACEID(CI_IFACEID, go->neg_ifaceid, go->ourid);
543 ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol);
550 * ipv6cp_ackci - Ack our CIs.
557 ipv6cp_ackci(f, p, len)
562 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
563 u_short cilen, citype, cishort;
567 * CIs must be in exactly the same order that we sent...
568 * Check packet length and CI length at each step.
569 * If we find any deviations, then this packet is bad.
572 #define ACKCIVJ(opt, neg, val) \
574 int vjlen = CILEN_COMPRESS; \
575 if ((len -= vjlen) < 0) \
577 GETCHAR(citype, p); \
579 if (cilen != vjlen || \
582 GETSHORT(cishort, p); \
583 if (cishort != val) \
587 #define ACKCIIFACEID(opt, neg, val1) \
589 int idlen = CILEN_IFACEID; \
590 if ((len -= idlen) < 0) \
592 GETCHAR(citype, p); \
594 if (cilen != idlen || \
597 eui64_get(ifaceid, p); \
598 if (! eui64_equals(val1, ifaceid)) \
602 ACKCIIFACEID(CI_IFACEID, go->neg_ifaceid, go->ourid);
604 ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol);
607 * If there are any remaining CIs, then this packet is bad.
614 IPV6CPDEBUG(("ipv6cp_ackci: received bad Ack!"));
619 * ipv6cp_nakci - Peer has sent a NAK for some of our CIs.
620 * This should not modify any state if the Nak is bad
621 * or if IPV6CP is in the OPENED state.
628 ipv6cp_nakci(f, p, len)
633 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
634 u_char citype, cilen, *next;
637 ipv6cp_options no; /* options we've seen Naks for */
638 ipv6cp_options try; /* options to request next time */
640 BZERO(&no, sizeof(no));
644 * Any Nak'd CIs must be in exactly the same order that we sent.
645 * Check packet length and CI length at each step.
646 * If we find any deviations, then this packet is bad.
648 #define NAKCIIFACEID(opt, neg, code) \
650 len >= (cilen = CILEN_IFACEID) && \
655 eui64_get(ifaceid, p); \
660 #define NAKCIVJ(opt, neg, code) \
662 ((cilen = p[1]) == CILEN_COMPRESS) && \
667 GETSHORT(cishort, p); \
673 * Accept the peer's idea of {our,his} interface identifier, if different
674 * from our idea, only if the accept_{local,remote} flag is set.
676 NAKCIIFACEID(CI_IFACEID, neg_ifaceid,
677 if (go->accept_local) {
678 while (eui64_iszero(ifaceid) ||
679 eui64_equals(ifaceid, go->hisid)) /* bad luck */
680 eui64_magic(ifaceid);
682 IPV6CPDEBUG(("local LL address %s", llv6_ntoa(ifaceid)));
687 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
689 if (cishort == IPV6CP_COMP) {
690 try.vj_protocol = cishort;
697 NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
705 * There may be remaining CIs, if the peer is requesting negotiation
706 * on an option that we didn't include in our request packet.
707 * If they want to negotiate about interface identifier, we comply.
708 * If they want us to ask for compression, we refuse.
710 while (len > CILEN_VOID) {
713 if( (len -= cilen) < 0 )
715 next = p + cilen - 2;
718 case CI_COMPRESSTYPE:
719 if (go->neg_vj || no.neg_vj ||
720 (cilen != CILEN_COMPRESS))
725 if (go->neg_ifaceid || no.neg_ifaceid || cilen != CILEN_IFACEID)
728 eui64_get(ifaceid, p);
729 if (go->accept_local) {
730 while (eui64_iszero(ifaceid) ||
731 eui64_equals(ifaceid, go->hisid)) /* bad luck */
732 eui64_magic(ifaceid);
741 /* If there is still anything left, this packet is bad. */
746 * OK, the Nak is good. Now we can update state.
748 if (f->state != OPENED)
754 IPV6CPDEBUG(("ipv6cp_nakci: received bad Nak!"));
760 * ipv6cp_rejci - Reject some of our CIs.
763 ipv6cp_rejci(f, p, len)
768 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
772 ipv6cp_options try; /* options to request next time */
776 * Any Rejected CIs must be in exactly the same order that we sent.
777 * Check packet length and CI length at each step.
778 * If we find any deviations, then this packet is bad.
780 #define REJCIIFACEID(opt, neg, val1) \
782 len >= (cilen = CILEN_IFACEID) && \
787 eui64_get(ifaceid, p); \
788 /* Check rejected value. */ \
789 if (! eui64_equals(ifaceid, val1)) \
794 #define REJCIVJ(opt, neg, val) \
796 p[1] == CILEN_COMPRESS && \
801 GETSHORT(cishort, p); \
802 /* Check rejected value. */ \
803 if (cishort != val) \
808 REJCIIFACEID(CI_IFACEID, neg_ifaceid, go->ourid);
810 REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol);
813 * If there are any remaining CIs, then this packet is bad.
818 * Now we can update state.
820 if (f->state != OPENED)
825 IPV6CPDEBUG(("ipv6cp_rejci: received bad Reject!"));
831 * ipv6cp_reqci - Check the peer's requested CIs and send appropriate response.
833 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
834 * appropriately. If reject_if_disagree is non-zero, doesn't return
835 * CONFNAK; returns CONFREJ if it can't return CONFACK.
838 ipv6cp_reqci(f, inp, len, reject_if_disagree)
840 u_char *inp; /* Requested CIs */
841 int *len; /* Length of requested CIs */
842 int reject_if_disagree;
844 ipv6cp_options *wo = &ipv6cp_wantoptions[f->unit];
845 ipv6cp_options *ho = &ipv6cp_hisoptions[f->unit];
846 ipv6cp_options *ao = &ipv6cp_allowoptions[f->unit];
847 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
848 u_char *cip, *next; /* Pointer to current and next CIs */
849 u_short cilen, citype; /* Parsed len, type */
850 u_short cishort; /* Parsed short value */
851 eui64_t ifaceid; /* Parsed interface identifier */
852 int rc = CONFACK; /* Final packet return code */
853 int orc; /* Individual option return code */
854 u_char *p; /* Pointer to next char to parse */
855 u_char *ucp = inp; /* Pointer to current output char */
856 int l = *len; /* Length left */
859 * Reset all his options.
861 BZERO(ho, sizeof(*ho));
864 * Process all his options.
868 orc = CONFACK; /* Assume success */
869 cip = p = next; /* Remember begining of CI */
870 if (l < 2 || /* Not enough data for CI header or */
871 p[1] < 2 || /* CI length too small or */
872 p[1] > l) { /* CI length too big? */
873 IPV6CPDEBUG(("ipv6cp_reqci: bad CI length!"));
874 orc = CONFREJ; /* Reject bad CI */
875 cilen = l; /* Reject till end of packet */
876 l = 0; /* Don't loop again */
879 GETCHAR(citype, p); /* Parse CI type */
880 GETCHAR(cilen, p); /* Parse CI length */
881 l -= cilen; /* Adjust remaining length */
882 next += cilen; /* Step to next CI */
884 switch (citype) { /* Check CI type */
886 IPV6CPDEBUG(("ipv6cp: received interface identifier "));
888 if (!ao->neg_ifaceid ||
889 cilen != CILEN_IFACEID) { /* Check CI length */
890 orc = CONFREJ; /* Reject CI */
895 * If he has no interface identifier, or if we both have same
896 * identifier then NAK it with new idea.
897 * In particular, if we don't know his identifier, but he does,
900 eui64_get(ifaceid, p);
901 IPV6CPDEBUG(("(%s)", llv6_ntoa(ifaceid)));
902 if (eui64_iszero(ifaceid) && eui64_iszero(go->ourid)) {
903 orc = CONFREJ; /* Reject CI */
906 if (!eui64_iszero(wo->hisid) &&
907 !eui64_equals(ifaceid, wo->hisid) &&
908 eui64_iszero(go->hisid)) {
913 DECPTR(sizeof(ifaceid), p);
914 eui64_put(ifaceid, p);
916 if (eui64_iszero(ifaceid) || eui64_equals(ifaceid, go->ourid)) {
918 if (eui64_iszero(go->hisid)) /* first time, try option */
920 while (eui64_iszero(ifaceid) ||
921 eui64_equals(ifaceid, go->ourid)) /* bad luck */
922 eui64_magic(ifaceid);
924 DECPTR(sizeof(ifaceid), p);
925 eui64_put(ifaceid, p);
932 case CI_COMPRESSTYPE:
933 IPV6CPDEBUG(("ipv6cp: received COMPRESSTYPE "));
935 (cilen != CILEN_COMPRESS)) {
939 GETSHORT(cishort, p);
940 IPV6CPDEBUG(("(%d)", cishort));
943 if (!(cishort == IPV6CP_COMP)) {
949 ho->vj_protocol = cishort;
962 IPV6CPDEBUG((" (%s)\n", CODENAME(orc)));
964 if (orc == CONFACK && /* Good CI */
965 rc != CONFACK) /* but prior CI wasnt? */
966 continue; /* Don't send this one */
968 if (orc == CONFNAK) { /* Nak this CI? */
969 if (reject_if_disagree) /* Getting fed up with sending NAKs? */
970 orc = CONFREJ; /* Get tough if so */
972 if (rc == CONFREJ) /* Rejecting prior CI? */
973 continue; /* Don't send this one */
974 if (rc == CONFACK) { /* Ack'd all prior CIs? */
975 rc = CONFNAK; /* Not anymore... */
976 ucp = inp; /* Backup */
981 if (orc == CONFREJ && /* Reject this CI */
982 rc != CONFREJ) { /* but no prior ones? */
984 ucp = inp; /* Backup */
987 /* Need to move CI? */
989 BCOPY(cip, ucp, cilen); /* Move it */
991 /* Update output pointer */
996 * If we aren't rejecting this packet, and we want to negotiate
997 * their identifier and they didn't send their identifier, then we
998 * send a NAK with a CI_IFACEID option appended. We assume the
999 * input buffer is long enough that we can append the extra
1002 if (rc != CONFREJ && !ho->neg_ifaceid &&
1003 wo->req_ifaceid && !reject_if_disagree) {
1004 if (rc == CONFACK) {
1006 ucp = inp; /* reset pointer */
1007 wo->req_ifaceid = 0; /* don't ask again */
1009 PUTCHAR(CI_IFACEID, ucp);
1010 PUTCHAR(CILEN_IFACEID, ucp);
1011 eui64_put(wo->hisid, ucp);
1014 *len = ucp - inp; /* Compute output length */
1015 IPV6CPDEBUG(("ipv6cp: returning Configure-%s", CODENAME(rc)));
1016 return (rc); /* Return final code */
1021 * ipv6_check_options - check that any IP-related options are OK,
1022 * and assign appropriate defaults.
1025 ipv6_check_options()
1027 ipv6cp_options *wo = &ipv6cp_wantoptions[0];
1029 if (!ipv6cp_protent.enabled_flag)
1032 #if defined(SOL2) || defined(__linux__)
1034 * Persistent link-local id is only used when user has not explicitly
1035 * configure/hard-code the id
1037 if ((wo->use_persistent) && (!wo->opt_local) && (!wo->opt_remote)) {
1040 * On systems where there are no Ethernet interfaces used, there
1041 * may be other ways to obtain a persistent id. Right now, it
1042 * will fall back to using magic [see eui64_magic] below when
1043 * an EUI-48 from MAC address can't be obtained. Other possibilities
1044 * include obtaining EEPROM serial numbers, or some other unique
1045 * yet persistent number. On Sparc platforms, this is possible,
1046 * but too bad there's no standards yet for x86 machines.
1048 if (ether_to_eui64(&wo->ourid)) {
1054 if (!wo->opt_local) { /* init interface identifier */
1055 if (wo->use_ip && eui64_iszero(wo->ourid)) {
1056 eui64_setlo32(wo->ourid, ntohl(ipcp_wantoptions[0].ouraddr));
1057 if (!eui64_iszero(wo->ourid))
1061 while (eui64_iszero(wo->ourid))
1062 eui64_magic(wo->ourid);
1065 if (!wo->opt_remote) {
1066 if (wo->use_ip && eui64_iszero(wo->hisid)) {
1067 eui64_setlo32(wo->hisid, ntohl(ipcp_wantoptions[0].hisaddr));
1068 if (!eui64_iszero(wo->hisid))
1073 if (demand && (eui64_iszero(wo->ourid) || eui64_iszero(wo->hisid))) {
1074 option_error("local/remote LL address required for demand-dialling\n");
1081 * ipv6_demand_conf - configure the interface as though
1082 * IPV6CP were up, for use with dial-on-demand.
1088 ipv6cp_options *wo = &ipv6cp_wantoptions[u];
1090 #if defined(__linux__) || defined(SOL2) || (defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1097 #endif /* defined(SOL2) */
1099 if (!sif6addr(u, wo->ourid, wo->hisid))
1101 #if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1105 if (!sifnpmode(u, PPP_IPV6, NPMODE_QUEUE))
1108 notice("ipv6_demand_conf");
1109 notice("local LL address %s", llv6_ntoa(wo->ourid));
1110 notice("remote LL address %s", llv6_ntoa(wo->hisid));
1117 * ipv6cp_up - IPV6CP has come UP.
1119 * Configure the IPv6 network interface appropriately and bring it up.
1125 ipv6cp_options *ho = &ipv6cp_hisoptions[f->unit];
1126 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
1127 ipv6cp_options *wo = &ipv6cp_wantoptions[f->unit];
1129 IPV6CPDEBUG(("ipv6cp: up"));
1132 * We must have a non-zero LL address for both ends of the link.
1134 if (!ho->neg_ifaceid)
1135 ho->hisid = wo->hisid;
1137 if(!no_ifaceid_neg) {
1138 if (eui64_iszero(ho->hisid)) {
1139 error("Could not determine remote LL address");
1140 ipv6cp_close(f->unit, "Could not determine remote LL address");
1143 if (eui64_iszero(go->ourid)) {
1144 error("Could not determine local LL address");
1145 ipv6cp_close(f->unit, "Could not determine local LL address");
1148 if (eui64_equals(go->ourid, ho->hisid)) {
1149 error("local and remote LL addresses are equal");
1150 ipv6cp_close(f->unit, "local and remote LL addresses are equal");
1154 script_setenv("LLLOCAL", llv6_ntoa(go->ourid), 0);
1155 script_setenv("LLREMOTE", llv6_ntoa(ho->hisid), 0);
1158 /* set tcp compression */
1159 sif6comp(f->unit, ho->neg_vj);
1163 * If we are doing dial-on-demand, the interface is already
1164 * configured, so we put out any saved-up packets, then set the
1165 * interface to pass IPv6 packets.
1168 if (! eui64_equals(go->ourid, wo->ourid) ||
1169 ! eui64_equals(ho->hisid, wo->hisid)) {
1170 if (! eui64_equals(go->ourid, wo->ourid))
1171 warn("Local LL address changed to %s",
1172 llv6_ntoa(go->ourid));
1173 if (! eui64_equals(ho->hisid, wo->hisid))
1174 warn("Remote LL address changed to %s",
1175 llv6_ntoa(ho->hisid));
1176 ipv6cp_clear_addrs(f->unit, go->ourid, ho->hisid);
1178 /* Set the interface to the new addresses */
1179 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1181 warn("sif6addr failed");
1182 ipv6cp_close(f->unit, "Interface configuration failed");
1187 demand_rexmit(PPP_IPV6);
1188 sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS);
1194 #if !defined(__linux__) && !defined(SOL2) && !(defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1195 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1197 warn("sif6addr failed");
1198 ipv6cp_close(f->unit, "Interface configuration failed");
1203 /* bring the interface up for IPv6 */
1205 if (!sif6up(f->unit)) {
1207 warn("sifup failed (IPV6)");
1208 ipv6cp_close(f->unit, "Interface configuration failed");
1212 if (!sifup(f->unit)) {
1214 warn("sifup failed (IPV6)");
1215 ipv6cp_close(f->unit, "Interface configuration failed");
1218 #endif /* defined(SOL2) */
1220 #if defined(__linux__) || defined(SOL2) || (defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1221 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1223 warn("sif6addr failed");
1224 ipv6cp_close(f->unit, "Interface configuration failed");
1228 sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS);
1230 notice("local LL address %s", llv6_ntoa(go->ourid));
1231 notice("remote LL address %s", llv6_ntoa(ho->hisid));
1234 np_up(f->unit, PPP_IPV6);
1238 * Execute the ipv6-up script, like this:
1239 * /etc/ppp/ipv6-up interface tty speed local-LL remote-LL
1241 if (ipv6cp_script_state == s_down && ipv6cp_script_pid == 0) {
1242 ipv6cp_script_state = s_up;
1243 ipv6cp_script(_PATH_IPV6UP);
1249 * ipv6cp_down - IPV6CP has gone DOWN.
1251 * Take the IPv6 network interface down, clear its addresses
1252 * and delete routes through it.
1258 IPV6CPDEBUG(("ipv6cp: down"));
1259 update_link_stats(f->unit);
1262 np_down(f->unit, PPP_IPV6);
1265 sif6comp(f->unit, 0);
1269 * If we are doing dial-on-demand, set the interface
1270 * to queue up outgoing packets (for now).
1273 sifnpmode(f->unit, PPP_IPV6, NPMODE_QUEUE);
1275 sifnpmode(f->unit, PPP_IPV6, NPMODE_DROP);
1276 #if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC)))
1281 #endif /* defined(SOL2) */
1283 ipv6cp_clear_addrs(f->unit,
1284 ipv6cp_gotoptions[f->unit].ourid,
1285 ipv6cp_hisoptions[f->unit].hisid);
1286 #if defined(__linux__) || (defined(SVR4) && (defined(SNI) || defined(__USLC)))
1291 /* Execute the ipv6-down script */
1292 if (ipv6cp_script_state == s_up && ipv6cp_script_pid == 0) {
1293 ipv6cp_script_state = s_down;
1294 ipv6cp_script(_PATH_IPV6DOWN);
1300 * ipv6cp_clear_addrs() - clear the interface addresses, routes,
1301 * proxy neighbour discovery entries, etc.
1304 ipv6cp_clear_addrs(unit, ourid, hisid)
1309 cif6addr(unit, ourid, hisid);
1314 * ipv6cp_finished - possibly shut down the lower layers.
1320 np_finished(f->unit, PPP_IPV6);
1325 * ipv6cp_script_done - called when the ipv6-up or ipv6-down script
1329 ipv6cp_script_done(arg)
1332 ipv6cp_script_pid = 0;
1333 switch (ipv6cp_script_state) {
1335 if (ipv6cp_fsm[0].state != OPENED) {
1336 ipv6cp_script_state = s_down;
1337 ipv6cp_script(_PATH_IPV6DOWN);
1341 if (ipv6cp_fsm[0].state == OPENED) {
1342 ipv6cp_script_state = s_up;
1343 ipv6cp_script(_PATH_IPV6UP);
1351 * ipv6cp_script - Execute a script with arguments
1352 * interface-name tty-name speed local-LL remote-LL.
1355 ipv6cp_script(script)
1358 char strspeed[32], strlocal[32], strremote[32];
1361 sprintf(strspeed, "%d", baud_rate);
1362 strcpy(strlocal, llv6_ntoa(ipv6cp_gotoptions[0].ourid));
1363 strcpy(strremote, llv6_ntoa(ipv6cp_hisoptions[0].hisid));
1370 argv[5] = strremote;
1374 ipv6cp_script_pid = run_program(script, argv, 0, ipv6cp_script_done, NULL);
1378 * ipv6cp_printpkt - print the contents of an IPV6CP packet.
1380 static char *ipv6cp_codenames[] = {
1381 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
1382 "TermReq", "TermAck", "CodeRej"
1386 ipv6cp_printpkt(p, plen, printer, arg)
1389 void (*printer) __P((void *, char *, ...));
1392 int code, id, len, olen;
1393 u_char *pstart, *optend;
1397 if (plen < HEADERLEN)
1403 if (len < HEADERLEN || len > plen)
1406 if (code >= 1 && code <= sizeof(ipv6cp_codenames) / sizeof(char *))
1407 printer(arg, " %s", ipv6cp_codenames[code-1]);
1409 printer(arg, " code=0x%x", code);
1410 printer(arg, " id=0x%x", id);
1417 /* print option list */
1422 if (olen < 2 || olen > len) {
1429 case CI_COMPRESSTYPE:
1430 if (olen >= CILEN_COMPRESS) {
1432 GETSHORT(cishort, p);
1433 printer(arg, "compress ");
1434 printer(arg, "0x%x", cishort);
1438 if (olen == CILEN_IFACEID) {
1440 eui64_get(ifaceid, p);
1441 printer(arg, "addr %s", llv6_ntoa(ifaceid));
1445 while (p < optend) {
1447 printer(arg, " %.2x", code);
1455 if (len > 0 && *p >= ' ' && *p < 0x7f) {
1457 print_string((char *)p, len, printer, arg);
1464 /* print the rest of the bytes in the packet */
1465 for (; len > 0; --len) {
1467 printer(arg, " %.2x", code);
1474 * ipv6_active_pkt - see if this IP packet is worth bringing the link up for.
1475 * We don't bring the link up for IP fragments or for TCP FIN packets
1478 #define IP6_HDRLEN 40 /* bytes */
1479 #define IP6_NHDR_FRAG 44 /* fragment IPv6 header */
1480 #define IPPROTO_TCP 6
1481 #define TCP_HDRLEN 20
1485 * We use these macros because the IP header may be at an odd address,
1486 * and some compilers might use word loads to get th_off or ip_hl.
1489 #define get_ip6nh(x) (((unsigned char *)(x))[6])
1490 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
1491 #define get_tcpflags(x) (((unsigned char *)(x))[13])
1494 ipv6_active_pkt(pkt, len)
1502 if (len < IP6_HDRLEN)
1504 if (get_ip6nh(pkt) == IP6_NHDR_FRAG)
1506 if (get_ip6nh(pkt) != IPPROTO_TCP)
1508 if (len < IP6_HDRLEN + TCP_HDRLEN)
1510 tcp = pkt + IP6_HDRLEN;
1511 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == IP6_HDRLEN + get_tcpoff(tcp) * 4)