/*
- ipv6cp.c - PPP IPV6 Control Protocol.
- Copyright (C) 1999 Tommi Komulainen <Tommi.Komulainen@iki.fi>
-
- 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
+ * <Tommi.Komulainen@iki.fi>".
+ *
+ * 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 :
*
* 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.
+ *
+ * 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
*
- * 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.
+ * 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/)."
*
- * $Id: ipv6cp.c,v 1.5 1999/09/11 12:04:22 paulus Exp $
+ * 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 1.5 1999/09/11 12:04:22 paulus Exp $"
+#define RCSID "$Id: ipv6cp.c,v 1.21 2005/08/25 23:59:34 paulus Exp $"
/*
* TODO:
*/
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include "magic.h"
#include "pathnames.h"
-static const char rcsid[] = RCSID;
/* global vars */
ipv6cp_options ipv6cp_wantoptions[NUM_PPP]; /* Options that we want to request */
int no_ifaceid_neg = 0;
/* local vars */
+static int default_route_set[NUM_PPP]; /* Have set up a default route */
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)
*/
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 */
* 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 },
+
+ { "defaultroute6", o_bool, &ipv6cp_wantoptions[0].default_route,
+ "Add default IPv6 route", OPT_ENABLE|1, &ipv6cp_allowoptions[0].default_route },
+ { "nodefaultroute6", o_bool, &ipv6cp_allowoptions[0].default_route,
+ "disable defaultroute6 option", OPT_A2CLR,
+ &ipv6cp_wantoptions[0].default_route },
+ { "-defaultroute6", o_bool, &ipv6cp_allowoptions[0].default_route,
+ "disable defaultroute6 option", OPT_ALIAS | OPT_A2CLR,
+ &ipv6cp_wantoptions[0].default_route },
+
{ "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 }
};
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)) )
* 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;
}
/*
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;
+ }
}
- ipv6cp_protent.enabled_flag = 1;
+ 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.
*/
wo->vj_protocol = IPV6CP_COMP;
#endif
+ /*
+ * XXX This controls whether the user may use the defaultroute option.
+ */
+ ao->default_route = 1;
}
* 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;
* 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;
* 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;
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;
{
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));
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);
}
}
{
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__)))
#endif
if (!sifnpmode(u, PPP_IPV6, NPMODE_QUEUE))
return 0;
+ if (wo->default_route)
+ if (sif6defaultroute(u, wo->ourid, wo->hisid))
+ default_route_set[u] = 1;
notice("ipv6_demand_conf");
notice("local LL address %s", llv6_ntoa(wo->ourid));
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 */
return;
}
+ /* assign a default route through the interface if required */
+ if (ipv6cp_wantoptions[f->unit].default_route)
+ if (sif6defaultroute(f->unit, go->ourid, ho->hisid))
+ default_route_set[f->unit] = 1;
}
demand_rexmit(PPP_IPV6);
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);
+ /* assign a default route through the interface if required */
+ if (ipv6cp_wantoptions[f->unit].default_route)
+ if (sif6defaultroute(f->unit, go->ourid, ho->hisid))
+ default_route_set[f->unit] = 1;
+
notice("local LL address %s", llv6_ntoa(go->ourid));
notice("remote LL address %s", llv6_ntoa(ho->hisid));
}
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
{
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);
} 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
}
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);
}
/*
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;
}
*/
#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