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 1.15 2001/03/22 00:42:33 paulus Exp $
96 #define RCSID "$Id: ipv6cp.c,v 1.15 2001/03/22 00:42:33 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 printifaceid(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];
1027 if (!ipv6cp_protent.enabled_flag)
1032 * Persistent link-local id is only used when user has not explicitly
1033 * configure/hard-code the id
1035 if ((wo->use_persistent) && (!wo->opt_local) && (!wo->opt_remote)) {
1038 * On systems where there are no Ethernet interfaces used, there
1039 * may be other ways to obtain a persistent id. Right now, it
1040 * will fall back to using magic [see eui64_magic] below when
1041 * an EUI-48 from MAC address can't be obtained. Other possibilities
1042 * include obtaining EEPROM serial numbers, or some other unique
1043 * yet persistent number. On Sparc platforms, this is possible,
1044 * but too bad there's no standards yet for x86 machines.
1046 if (ether_to_eui64(&wo->ourid)) {
1052 if (!wo->opt_local) { /* init interface identifier */
1053 if (wo->use_ip && eui64_iszero(wo->ourid)) {
1054 eui64_setlo32(wo->ourid, ntohl(ipcp_wantoptions[0].ouraddr));
1055 if (!eui64_iszero(wo->ourid))
1059 while (eui64_iszero(wo->ourid))
1060 eui64_magic(wo->ourid);
1063 if (!wo->opt_remote) {
1064 if (wo->use_ip && eui64_iszero(wo->hisid)) {
1065 eui64_setlo32(wo->hisid, ntohl(ipcp_wantoptions[0].hisaddr));
1066 if (!eui64_iszero(wo->hisid))
1071 if (demand && (eui64_iszero(wo->ourid) || eui64_iszero(wo->hisid))) {
1072 option_error("local/remote LL address required for demand-dialling\n");
1079 * ipv6_demand_conf - configure the interface as though
1080 * IPV6CP were up, for use with dial-on-demand.
1086 ipv6cp_options *wo = &ipv6cp_wantoptions[u];
1088 #if defined(__linux__) || defined(SOL2) || (defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1095 #endif /* defined(SOL2) */
1097 if (!sif6addr(u, wo->ourid, wo->hisid))
1099 #if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1103 if (!sifnpmode(u, PPP_IPV6, NPMODE_QUEUE))
1106 notice("ipv6_demand_conf");
1107 notice("local LL address %s", llv6_ntoa(wo->ourid));
1108 notice("remote LL address %s", llv6_ntoa(wo->hisid));
1115 * ipv6cp_up - IPV6CP has come UP.
1117 * Configure the IPv6 network interface appropriately and bring it up.
1123 ipv6cp_options *ho = &ipv6cp_hisoptions[f->unit];
1124 ipv6cp_options *go = &ipv6cp_gotoptions[f->unit];
1125 ipv6cp_options *wo = &ipv6cp_wantoptions[f->unit];
1127 IPV6CPDEBUG(("ipv6cp: up"));
1130 * We must have a non-zero LL address for both ends of the link.
1132 if (!ho->neg_ifaceid)
1133 ho->hisid = wo->hisid;
1135 if(!no_ifaceid_neg) {
1136 if (eui64_iszero(ho->hisid)) {
1137 error("Could not determine remote LL address");
1138 ipv6cp_close(f->unit, "Could not determine remote LL address");
1141 if (eui64_iszero(go->ourid)) {
1142 error("Could not determine local LL address");
1143 ipv6cp_close(f->unit, "Could not determine local LL address");
1146 if (eui64_equals(go->ourid, ho->hisid)) {
1147 error("local and remote LL addresses are equal");
1148 ipv6cp_close(f->unit, "local and remote LL addresses are equal");
1152 script_setenv("LLLOCAL", llv6_ntoa(go->ourid), 0);
1153 script_setenv("LLREMOTE", llv6_ntoa(ho->hisid), 0);
1156 /* set tcp compression */
1157 sif6comp(f->unit, ho->neg_vj);
1161 * If we are doing dial-on-demand, the interface is already
1162 * configured, so we put out any saved-up packets, then set the
1163 * interface to pass IPv6 packets.
1166 if (! eui64_equals(go->ourid, wo->ourid) ||
1167 ! eui64_equals(ho->hisid, wo->hisid)) {
1168 if (! eui64_equals(go->ourid, wo->ourid))
1169 warn("Local LL address changed to %s",
1170 llv6_ntoa(go->ourid));
1171 if (! eui64_equals(ho->hisid, wo->hisid))
1172 warn("Remote LL address changed to %s",
1173 llv6_ntoa(ho->hisid));
1174 ipv6cp_clear_addrs(f->unit, go->ourid, ho->hisid);
1176 /* Set the interface to the new addresses */
1177 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1179 warn("sif6addr failed");
1180 ipv6cp_close(f->unit, "Interface configuration failed");
1185 demand_rexmit(PPP_IPV6);
1186 sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS);
1192 #if !defined(__linux__) && !defined(SOL2) && !(defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1193 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1195 warn("sif6addr failed");
1196 ipv6cp_close(f->unit, "Interface configuration failed");
1201 /* bring the interface up for IPv6 */
1203 if (!sif6up(f->unit)) {
1205 warn("sifup failed (IPV6)");
1206 ipv6cp_close(f->unit, "Interface configuration failed");
1210 if (!sifup(f->unit)) {
1212 warn("sifup failed (IPV6)");
1213 ipv6cp_close(f->unit, "Interface configuration failed");
1216 #endif /* defined(SOL2) */
1218 #if defined(__linux__) || defined(SOL2) || (defined(SVR4) && (defined(SNI) || defined(__USLC__)))
1219 if (!sif6addr(f->unit, go->ourid, ho->hisid)) {
1221 warn("sif6addr failed");
1222 ipv6cp_close(f->unit, "Interface configuration failed");
1226 sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS);
1228 notice("local LL address %s", llv6_ntoa(go->ourid));
1229 notice("remote LL address %s", llv6_ntoa(ho->hisid));
1232 np_up(f->unit, PPP_IPV6);
1236 * Execute the ipv6-up script, like this:
1237 * /etc/ppp/ipv6-up interface tty speed local-LL remote-LL
1239 if (ipv6cp_script_state == s_down && ipv6cp_script_pid == 0) {
1240 ipv6cp_script_state = s_up;
1241 ipv6cp_script(_PATH_IPV6UP);
1247 * ipv6cp_down - IPV6CP has gone DOWN.
1249 * Take the IPv6 network interface down, clear its addresses
1250 * and delete routes through it.
1256 IPV6CPDEBUG(("ipv6cp: down"));
1257 update_link_stats(f->unit);
1260 np_down(f->unit, PPP_IPV6);
1263 sif6comp(f->unit, 0);
1267 * If we are doing dial-on-demand, set the interface
1268 * to queue up outgoing packets (for now).
1271 sifnpmode(f->unit, PPP_IPV6, NPMODE_QUEUE);
1273 sifnpmode(f->unit, PPP_IPV6, NPMODE_DROP);
1274 #if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC)))
1279 #endif /* defined(SOL2) */
1281 ipv6cp_clear_addrs(f->unit,
1282 ipv6cp_gotoptions[f->unit].ourid,
1283 ipv6cp_hisoptions[f->unit].hisid);
1284 #if defined(__linux__) || (defined(SVR4) && (defined(SNI) || defined(__USLC)))
1289 /* Execute the ipv6-down script */
1290 if (ipv6cp_script_state == s_up && ipv6cp_script_pid == 0) {
1291 ipv6cp_script_state = s_down;
1292 ipv6cp_script(_PATH_IPV6DOWN);
1298 * ipv6cp_clear_addrs() - clear the interface addresses, routes,
1299 * proxy neighbour discovery entries, etc.
1302 ipv6cp_clear_addrs(unit, ourid, hisid)
1307 cif6addr(unit, ourid, hisid);
1312 * ipv6cp_finished - possibly shut down the lower layers.
1318 np_finished(f->unit, PPP_IPV6);
1323 * ipv6cp_script_done - called when the ipv6-up or ipv6-down script
1327 ipv6cp_script_done(arg)
1330 ipv6cp_script_pid = 0;
1331 switch (ipv6cp_script_state) {
1333 if (ipv6cp_fsm[0].state != OPENED) {
1334 ipv6cp_script_state = s_down;
1335 ipv6cp_script(_PATH_IPV6DOWN);
1339 if (ipv6cp_fsm[0].state == OPENED) {
1340 ipv6cp_script_state = s_up;
1341 ipv6cp_script(_PATH_IPV6UP);
1349 * ipv6cp_script - Execute a script with arguments
1350 * interface-name tty-name speed local-LL remote-LL.
1353 ipv6cp_script(script)
1356 char strspeed[32], strlocal[32], strremote[32];
1359 sprintf(strspeed, "%d", baud_rate);
1360 strcpy(strlocal, llv6_ntoa(ipv6cp_gotoptions[0].ourid));
1361 strcpy(strremote, llv6_ntoa(ipv6cp_hisoptions[0].hisid));
1368 argv[5] = strremote;
1372 ipv6cp_script_pid = run_program(script, argv, 0, ipv6cp_script_done, NULL);
1376 * ipv6cp_printpkt - print the contents of an IPV6CP packet.
1378 static char *ipv6cp_codenames[] = {
1379 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
1380 "TermReq", "TermAck", "CodeRej"
1384 ipv6cp_printpkt(p, plen, printer, arg)
1387 void (*printer) __P((void *, char *, ...));
1390 int code, id, len, olen;
1391 u_char *pstart, *optend;
1395 if (plen < HEADERLEN)
1401 if (len < HEADERLEN || len > plen)
1404 if (code >= 1 && code <= sizeof(ipv6cp_codenames) / sizeof(char *))
1405 printer(arg, " %s", ipv6cp_codenames[code-1]);
1407 printer(arg, " code=0x%x", code);
1408 printer(arg, " id=0x%x", id);
1415 /* print option list */
1420 if (olen < 2 || olen > len) {
1427 case CI_COMPRESSTYPE:
1428 if (olen >= CILEN_COMPRESS) {
1430 GETSHORT(cishort, p);
1431 printer(arg, "compress ");
1432 printer(arg, "0x%x", cishort);
1436 if (olen == CILEN_IFACEID) {
1438 eui64_get(ifaceid, p);
1439 printer(arg, "addr %s", llv6_ntoa(ifaceid));
1443 while (p < optend) {
1445 printer(arg, " %.2x", code);
1453 if (len > 0 && *p >= ' ' && *p < 0x7f) {
1455 print_string((char *)p, len, printer, arg);
1462 /* print the rest of the bytes in the packet */
1463 for (; len > 0; --len) {
1465 printer(arg, " %.2x", code);
1472 * ipv6_active_pkt - see if this IP packet is worth bringing the link up for.
1473 * We don't bring the link up for IP fragments or for TCP FIN packets
1476 #define IP6_HDRLEN 40 /* bytes */
1477 #define IP6_NHDR_FRAG 44 /* fragment IPv6 header */
1478 #define IPPROTO_TCP 6
1479 #define TCP_HDRLEN 20
1483 * We use these macros because the IP header may be at an odd address,
1484 * and some compilers might use word loads to get th_off or ip_hl.
1487 #define get_ip6nh(x) (((unsigned char *)(x))[6])
1488 #define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
1489 #define get_tcpflags(x) (((unsigned char *)(x))[13])
1492 ipv6_active_pkt(pkt, len)
1500 if (len < IP6_HDRLEN)
1502 if (get_ip6nh(pkt) == IP6_NHDR_FRAG)
1504 if (get_ip6nh(pkt) != IPPROTO_TCP)
1506 if (len < IP6_HDRLEN + TCP_HDRLEN)
1508 tcp = pkt + IP6_HDRLEN;
1509 if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == IP6_HDRLEN + get_tcpoff(tcp) * 4)