X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fipv6cp.c;h=356ff84ead4103cb846c31c6e806786b166a33e5;hp=e2055a445b32c77637008ed258462155511b2bb2;hb=70a8ad3dbd8af3b52d624550fc3343d1849c3f76;hpb=10a68fd183c5e16e95fce56e7b292f1436b1e714 diff --git a/pppd/ipv6cp.c b/pppd/ipv6cp.c index e2055a4..356ff84 100644 --- a/pppd/ipv6cp.c +++ b/pppd/ipv6cp.c @@ -1,21 +1,38 @@ /* - ipv6cp.c - PPP IPV6 Control Protocol. - Copyright (C) 1999 Tommi Komulainen - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -*/ + * ipv6cp.c - PPP IPV6 Control Protocol. + * + * Copyright (c) 1999 Tommi Komulainen. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The name(s) of the authors of this software must not be used to + * endorse or promote products derived from this software without + * prior written permission. + * + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Tommi Komulainen + * ". + * + * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ /* Original version, based on RFC2023 : @@ -80,25 +97,48 @@ * * ipcp.c - PPP IP Control Protocol. * - * Copyright (c) 1989 Carnegie Mellon University. - * All rights reserved. + * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by Carnegie Mellon University. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * 3. The name "Carnegie Mellon University" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For permission or any legal + * details, please contact + * Office of Technology Transfer + * Carnegie Mellon University + * 5000 Forbes Avenue + * Pittsburgh, PA 15213-3890 + * (412) 268-4387, fax: (412) 268-7395 + * tech-transfer@andrew.cmu.edu * - * $Id: ipv6cp.c,v 1.4 1999/08/25 04:15:51 paulus Exp $ + * 4. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by Computing Services + * at Carnegie Mellon University (http://www.cmu.edu/computing/)." + * + * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO + * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE + * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * $Id: ipv6cp.c,v 1.21 2005/08/25 23:59:34 paulus Exp $ */ -#define RCSID "$Id: ipv6cp.c,v 1.4 1999/08/25 04:15:51 paulus Exp $" +#define RCSID "$Id: ipv6cp.c,v 1.21 2005/08/25 23:59:34 paulus Exp $" /* * TODO: @@ -111,6 +151,7 @@ */ #include +#include #include #include #include @@ -139,6 +180,16 @@ int no_ifaceid_neg = 0; /* local vars */ static int ipv6cp_is_up; +/* Hook for a plugin to know when IPv6 protocol has come up */ +void (*ipv6_up_hook) __P((void)) = NULL; + +/* Hook for a plugin to know when IPv6 protocol has come down */ +void (*ipv6_down_hook) __P((void)) = NULL; + +/* Notifiers for when IPCPv6 goes up and down */ +struct notifier *ipv6_up_notifier = NULL; +struct notifier *ipv6_down_notifier = NULL; + /* * Callbacks for fsm code. (CI = Configuration Information) */ @@ -146,7 +197,7 @@ static void ipv6cp_resetci __P((fsm *)); /* Reset our CI */ static int ipv6cp_cilen __P((fsm *)); /* Return length of our CI */ static void ipv6cp_addci __P((fsm *, u_char *, int *)); /* Add our CI */ static int ipv6cp_ackci __P((fsm *, u_char *, int)); /* Peer ack'd our CI */ -static int ipv6cp_nakci __P((fsm *, u_char *, int)); /* Peer nak'd our CI */ +static int ipv6cp_nakci __P((fsm *, u_char *, int, int));/* Peer nak'd our CI */ static int ipv6cp_rejci __P((fsm *, u_char *, int)); /* Peer rej'd our CI */ static int ipv6cp_reqci __P((fsm *, u_char *, int *, int)); /* Rcv CI */ static void ipv6cp_up __P((fsm *)); /* We're UP */ @@ -177,30 +228,38 @@ static fsm_callbacks ipv6cp_callbacks = { /* IPV6CP callback routines */ * Command-line options. */ static int setifaceid __P((char **arg)); +static void printifaceid __P((option_t *, + void (*)(void *, char *, ...), void *)); static option_t ipv6cp_option_list[] = { - { "ipv6", o_special, setifaceid, - "Set interface identifiers for IPV6" }, + { "ipv6", o_special, (void *)setifaceid, + "Set interface identifiers for IPV6", + OPT_A2PRINTER, (void *)printifaceid }, + + { "+ipv6", o_bool, &ipv6cp_protent.enabled_flag, + "Enable IPv6 and IPv6CP", OPT_PRIO | 1 }, { "noipv6", o_bool, &ipv6cp_protent.enabled_flag, - "Disable IPv6 and IPv6CP" }, + "Disable IPv6 and IPv6CP", OPT_PRIOSUB }, { "-ipv6", o_bool, &ipv6cp_protent.enabled_flag, - "Disable IPv6 and IPv6CP" }, - { "+ipv6", o_bool, &ipv6cp_protent.enabled_flag, - "Enable IPv6 and IPv6CP", 1 }, + "Disable IPv6 and IPv6CP", OPT_PRIOSUB | OPT_ALIAS }, { "ipv6cp-accept-local", o_bool, &ipv6cp_allowoptions[0].accept_local, "Accept peer's interface identifier for us", 1 }, + { "ipv6cp-use-ipaddr", o_bool, &ipv6cp_allowoptions[0].use_ip, - "Use (default) IPv4 address as interface identifier", 0 }, + "Use (default) IPv4 address as interface identifier", 1 }, + + { "ipv6cp-use-persistent", o_bool, &ipv6cp_wantoptions[0].use_persistent, + "Use uniquely-available persistent value for link local address", 1 }, { "ipv6cp-restart", o_int, &ipv6cp_fsm[0].timeouttime, - "Set timeout for IPv6CP" }, + "Set timeout for IPv6CP", OPT_PRIO }, { "ipv6cp-max-terminate", o_int, &ipv6cp_fsm[0].maxtermtransmits, - "Set max #xmits for term-reqs" }, + "Set max #xmits for term-reqs", OPT_PRIO }, { "ipv6cp-max-configure", o_int, &ipv6cp_fsm[0].maxconfreqtransmits, - "Set max #xmits for conf-reqs" }, + "Set max #xmits for conf-reqs", OPT_PRIO }, { "ipv6cp-max-failure", o_int, &ipv6cp_fsm[0].maxnakloops, - "Set max #conf-naks for IPv6CP" }, + "Set max #conf-naks for IPv6CP", OPT_PRIO }, { NULL } }; @@ -273,10 +332,11 @@ static int setifaceid(argv) char **argv; { - char *comma, *arg; + char *comma, *arg, c; ipv6cp_options *wo = &ipv6cp_wantoptions[0]; struct in6_addr addr; - + static int prio_local, prio_remote; + #define VALIDID(a) ( (((a).s6_addr32[0] == 0) && ((a).s6_addr32[1] == 0)) && \ (((a).s6_addr32[2] != 0) || ((a).s6_addr32[3] != 0)) ) @@ -288,16 +348,20 @@ setifaceid(argv) * If comma first character, then no local identifier */ if (comma != arg) { + c = *comma; *comma = '\0'; if (inet_pton(AF_INET6, arg, &addr) == 0 || !VALIDID(addr)) { option_error("Illegal interface identifier (local): %s", arg); return 0; } - - eui64_copy(addr.s6_addr32[2], wo->ourid); - wo->opt_local = 1; - *comma = ','; + + if (option_priority >= prio_local) { + eui64_copy(addr.s6_addr32[2], wo->ourid); + wo->opt_local = 1; + prio_local = option_priority; + } + *comma = c; } /* @@ -308,13 +372,35 @@ setifaceid(argv) option_error("Illegal interface identifier (remote): %s", comma); return 0; } - eui64_copy(addr.s6_addr32[2], wo->hisid); - wo->opt_remote = 1; + if (option_priority >= prio_remote) { + eui64_copy(addr.s6_addr32[2], wo->hisid); + wo->opt_remote = 1; + prio_remote = option_priority; + } } + if (override_value("+ipv6", option_priority, option_source)) + ipv6cp_protent.enabled_flag = 1; return 1; } +char *llv6_ntoa(eui64_t ifaceid); + +static void +printifaceid(opt, printer, arg) + option_t *opt; + void (*printer) __P((void *, char *, ...)); + void *arg; +{ + ipv6cp_options *wo = &ipv6cp_wantoptions[0]; + + if (wo->opt_local) + printer(arg, "%s", llv6_ntoa(wo->ourid)); + printer(arg, ","); + if (wo->opt_remote) + printer(arg, "%s", llv6_ntoa(wo->hisid)); +} + /* * Make a string representation of a network address. */ @@ -593,10 +679,11 @@ bad: * 1 - Nak was good. */ static int -ipv6cp_nakci(f, p, len) +ipv6cp_nakci(f, p, len, treat_as_reject) fsm *f; u_char *p; int len; + int treat_as_reject; { ipv6cp_options *go = &ipv6cp_gotoptions[f->unit]; u_char citype, cilen, *next; @@ -642,19 +729,21 @@ ipv6cp_nakci(f, p, len) * from our idea, only if the accept_{local,remote} flag is set. */ NAKCIIFACEID(CI_IFACEID, neg_ifaceid, - if (go->accept_local) { - while (eui64_iszero(ifaceid) || - eui64_equals(ifaceid, go->hisid)) /* bad luck */ - eui64_magic(ifaceid); - try.ourid = ifaceid; - IPV6CPDEBUG(("local LL address %s", llv6_ntoa(ifaceid))); - } - ); + if (treat_as_reject) { + try.neg_ifaceid = 0; + } else if (go->accept_local) { + while (eui64_iszero(ifaceid) || + eui64_equals(ifaceid, go->hisid)) /* bad luck */ + eui64_magic(ifaceid); + try.ourid = ifaceid; + IPV6CPDEBUG(("local LL address %s", llv6_ntoa(ifaceid))); + } + ); #ifdef IPV6CP_COMP NAKCIVJ(CI_COMPRESSTYPE, neg_vj, { - if (cishort == IPV6CP_COMP) { + if (cishort == IPV6CP_COMP && !treat_as_reject) { try.vj_protocol = cishort; } else { try.neg_vj = 0; @@ -675,10 +764,10 @@ ipv6cp_nakci(f, p, len) * If they want to negotiate about interface identifier, we comply. * If they want us to ask for compression, we refuse. */ - while (len > CILEN_VOID) { + while (len >= CILEN_VOID) { GETCHAR(citype, p); GETCHAR(cilen, p); - if( (len -= cilen) < 0 ) + if ( cilen < CILEN_VOID || (len -= cilen) < 0 ) goto bad; next = p + cilen - 2; @@ -912,14 +1001,14 @@ ipv6cp_reqci(f, inp, len, reject_if_disagree) orc = CONFREJ; break; } -#else - orc = CONFREJ; - break; -#endif ho->neg_vj = 1; ho->vj_protocol = cishort; break; +#else + orc = CONFREJ; + break; +#endif default: orc = CONFREJ; @@ -994,6 +1083,29 @@ ipv6_check_options() { ipv6cp_options *wo = &ipv6cp_wantoptions[0]; + if (!ipv6cp_protent.enabled_flag) + return; + + /* + * Persistent link-local id is only used when user has not explicitly + * configure/hard-code the id + */ + if ((wo->use_persistent) && (!wo->opt_local) && (!wo->opt_remote)) { + + /* + * On systems where there are no Ethernet interfaces used, there + * may be other ways to obtain a persistent id. Right now, it + * will fall back to using magic [see eui64_magic] below when + * an EUI-48 from MAC address can't be obtained. Other possibilities + * include obtaining EEPROM serial numbers, or some other unique + * yet persistent number. On Sparc platforms, this is possible, + * but too bad there's no standards yet for x86 machines. + */ + if (ether_to_eui64(&wo->ourid)) { + wo->opt_local = 1; + } + } + if (!wo->opt_local) { /* init interface identifier */ if (wo->use_ip && eui64_iszero(wo->ourid)) { eui64_setlo32(wo->ourid, ntohl(ipcp_wantoptions[0].ouraddr)); @@ -1015,7 +1127,7 @@ ipv6_check_options() if (demand && (eui64_iszero(wo->ourid) || eui64_iszero(wo->hisid))) { option_error("local/remote LL address required for demand-dialling\n"); - exit(1); + exit(EXIT_OPTION_ERROR); } } @@ -1030,10 +1142,8 @@ ipv6_demand_conf(u) { ipv6cp_options *wo = &ipv6cp_wantoptions[u]; -#if defined(__linux__) || (defined(SVR4) && (defined(SNI) || defined(__USLC__))) - if (!sifup(u)) + if (!sif6up(u)) return 0; -#endif if (!sif6addr(u, wo->ourid, wo->hisid)) return 0; #if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC__))) @@ -1089,8 +1199,8 @@ ipv6cp_up(f) return; } } - script_setenv("LLLOCAL", llv6_ntoa(go->ourid)); - script_setenv("LLREMOTE", llv6_ntoa(ho->hisid)); + script_setenv("LLLOCAL", llv6_ntoa(go->ourid), 0); + script_setenv("LLREMOTE", llv6_ntoa(ho->hisid), 0); #ifdef IPV6CP_COMP /* set tcp compression */ @@ -1126,34 +1236,20 @@ ipv6cp_up(f) sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS); } else { - /* - * Set LL addresses - */ -#if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC__))) - if (!sif6addr(f->unit, go->ourid, ho->hisid)) { - if (debug) - warn("sif6addr failed"); - ipv6cp_close(f->unit, "Interface configuration failed"); - return; - } -#endif - /* bring the interface up for IPv6 */ - if (!sifup(f->unit)) { + if (!sif6up(f->unit)) { if (debug) - warn("sifup failed (IPV6)"); + warn("sif6up failed (IPV6)"); ipv6cp_close(f->unit, "Interface configuration failed"); return; } -#if defined(__linux__) || (defined(SVR4) && (defined(SNI) || defined(__USLC__))) if (!sif6addr(f->unit, go->ourid, ho->hisid)) { if (debug) warn("sif6addr failed"); ipv6cp_close(f->unit, "Interface configuration failed"); return; } -#endif sifnpmode(f->unit, PPP_IPV6, NPMODE_PASS); notice("local LL address %s", llv6_ntoa(go->ourid)); @@ -1163,6 +1259,10 @@ ipv6cp_up(f) np_up(f->unit, PPP_IPV6); ipv6cp_is_up = 1; + notify(ipv6_up_notifier, 0); + if (ipv6_up_hook) + ipv6_up_hook(); + /* * Execute the ipv6-up script, like this: * /etc/ppp/ipv6-up interface tty speed local-LL remote-LL @@ -1186,6 +1286,9 @@ ipv6cp_down(f) { IPV6CPDEBUG(("ipv6cp: down")); update_link_stats(f->unit); + notify(ipv6_down_notifier, 0); + if (ipv6_down_hook) + ipv6_down_hook(); if (ipv6cp_is_up) { ipv6cp_is_up = 0; np_down(f->unit, PPP_IPV6); @@ -1203,12 +1306,14 @@ ipv6cp_down(f) } else { sifnpmode(f->unit, PPP_IPV6, NPMODE_DROP); #if !defined(__linux__) && !(defined(SVR4) && (defined(SNI) || defined(__USLC))) - sifdown(f->unit); + sif6down(f->unit); #endif ipv6cp_clear_addrs(f->unit, ipv6cp_gotoptions[f->unit].ourid, ipv6cp_hisoptions[f->unit].hisid); -#if defined(__linux__) || (defined(SVR4) && (defined(SNI) || defined(__USLC))) +#if defined(__linux__) + sif6down(f->unit); +#elif defined(SVR4) && (defined(SNI) || defined(__USLC)) sifdown(f->unit); #endif } @@ -1296,7 +1401,8 @@ ipv6cp_script(script) argv[6] = ipparam; argv[7] = NULL; - ipv6cp_script_pid = run_program(script, argv, 0, ipv6cp_script_done, NULL); + ipv6cp_script_pid = run_program(script, argv, 0, ipv6cp_script_done, + NULL, 0); } /* @@ -1379,7 +1485,7 @@ ipv6cp_printpkt(p, plen, printer, arg) case TERMREQ: if (len > 0 && *p >= ' ' && *p < 0x7f) { printer(arg, " "); - print_string(p, len, printer, arg); + print_string((char *)p, len, printer, arg); p += len; len = 0; } @@ -1402,7 +1508,6 @@ ipv6cp_printpkt(p, plen, printer, arg) */ #define IP6_HDRLEN 40 /* bytes */ #define IP6_NHDR_FRAG 44 /* fragment IPv6 header */ -#define IPPROTO_TCP 6 #define TCP_HDRLEN 20 #define TH_FIN 0x01