freebsd-skq/usr.sbin/ppp/lcp.c

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/*
* PPP Link Control Protocol (LCP) Module
*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* 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 the Internet Initiative Japan, Inc. The name of the
* IIJ 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.
*
* $Id: lcp.c,v 1.55.2.41 1998/04/07 00:53:55 brian Exp $
*
* TODO:
* o Limit data field length by MRU
*/
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "defs.h"
#include "timer.h"
#include "fsm.h"
#include "lcp.h"
#include "throughput.h"
#include "lcpproto.h"
#include "descriptor.h"
#include "lqr.h"
#include "hdlc.h"
#include "ccp.h"
#include "async.h"
#include "link.h"
#include "physical.h"
#include "prompt.h"
/* for received LQRs */
struct lqrreq {
u_char type;
u_char length;
u_short proto; /* Quality protocol */
u_long period; /* Reporting interval */
};
static void LcpLayerUp(struct fsm *);
static void LcpLayerDown(struct fsm *);
static void LcpLayerStart(struct fsm *);
static void LcpLayerFinish(struct fsm *);
static void LcpInitRestartCounter(struct fsm *);
static void LcpSendConfigReq(struct fsm *);
static void LcpSentTerminateReq(struct fsm *);
static void LcpSendTerminateAck(struct fsm *, u_char);
1998-03-13 21:08:05 +00:00
static void LcpDecodeConfig(struct fsm *, u_char *, int, int,
struct fsm_decode *);
static struct fsm_callbacks lcp_Callbacks = {
LcpLayerUp,
LcpLayerDown,
LcpLayerStart,
LcpLayerFinish,
LcpInitRestartCounter,
LcpSendConfigReq,
LcpSentTerminateReq,
LcpSendTerminateAck,
LcpDecodeConfig,
NullRecvResetReq,
NullRecvResetAck
};
static const char *cftypes[] = {
/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
"???",
"MRU", /* 1: Maximum-Receive-Unit */
"ACCMAP", /* 2: Async-Control-Character-Map */
"AUTHPROTO", /* 3: Authentication-Protocol */
"QUALPROTO", /* 4: Quality-Protocol */
"MAGICNUM", /* 5: Magic-Number */
"RESERVED", /* 6: RESERVED */
"PROTOCOMP", /* 7: Protocol-Field-Compression */
"ACFCOMP", /* 8: Address-and-Control-Field-Compression */
"FCSALT", /* 9: FCS-Alternatives */
"SDP", /* 10: Self-Describing-Pad */
"NUMMODE", /* 11: Numbered-Mode */
"MULTIPROC", /* 12: Multi-Link-Procedure */
"CALLBACK", /* 13: Callback */
"CONTIME", /* 14: Connect-Time */
"COMPFRAME", /* 15: Compound-Frames */
"NDE", /* 16: Nominal-Data-Encapsulation */
"MULTIMRRU", /* 17: Multilink-MRRU */
"MULTISSNH", /* 18: Multilink-Short-Sequence-Number-Header */
"MULTIED", /* 19: Multilink-Endpoint-Descriminator */
"PROPRIETRY", /* 20: Proprietary */
"DCEID", /* 21: DCE-Identifier */
"MULTIPP", /* 22: Multi-Link-Plus-Procedure */
"LDBACP", /* 23: Link Discriminator for BACP */
};
#define NCFTYPES (sizeof cftypes/sizeof cftypes[0])
int
lcp_ReportStatus(struct cmdargs const *arg)
{
struct link *l = ChooseLink(arg);
struct lcp *lcp = &l->lcp;
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
prompt_Printf(arg->prompt, "%s: %s [%s]\n", l->name, lcp->fsm.name,
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
State2Nam(lcp->fsm.state));
prompt_Printf(arg->prompt,
" his side: MRU %d, ACCMAP %08lx, PROTOCOMP %s, ACFCOMP %s,\n"
" MAGIC %08lx, REJECT %04x\n",
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
lcp->his_mru, (u_long)lcp->his_accmap,
lcp->his_protocomp ? "on" : "off",
lcp->his_acfcomp ? "on" : "off",
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
(u_long)lcp->his_magic, lcp->his_reject);
prompt_Printf(arg->prompt,
" my side: MRU %d, ACCMAP %08lx, PROTOCOMP %s, ACFCOMP %s,\n"
" MAGIC %08lx, REJECT %04x\n",
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
lcp->want_mru, (u_long)lcp->want_accmap,
lcp->want_protocomp ? "on" : "off",
lcp->want_acfcomp ? "on" : "off",
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
(u_long)lcp->want_magic, lcp->my_reject);
prompt_Printf(arg->prompt, "\n Defaults: MRU = %d, ", lcp->cfg.mru);
if (l->lcp.cfg.mtu)
prompt_Printf(arg->prompt, "MTU = %d, ", lcp->cfg.mtu);
prompt_Printf(arg->prompt, "ACCMAP = %08lx\n", (u_long)lcp->cfg.accmap);
prompt_Printf(arg->prompt, " LQR period = %us, ",
lcp->cfg.lqrperiod);
prompt_Printf(arg->prompt, "Open Mode = %s",
lcp->cfg.openmode == OPEN_PASSIVE ? "passive" : "active");
if (lcp->cfg.openmode > 0)
prompt_Printf(arg->prompt, " (delay %ds)", lcp->cfg.openmode);
prompt_Printf(arg->prompt, "\n FSM retry = %us\n",
lcp->cfg.fsmretry);
prompt_Printf(arg->prompt, "\n Negotiation:\n");
prompt_Printf(arg->prompt, " ACFCOMP = %s\n",
command_ShowNegval(lcp->cfg.acfcomp));
prompt_Printf(arg->prompt, " CHAP = %s\n",
command_ShowNegval(lcp->cfg.chap));
prompt_Printf(arg->prompt, " LQR = %s\n",
command_ShowNegval(lcp->cfg.lqr));
prompt_Printf(arg->prompt, " PAP = %s\n",
command_ShowNegval(lcp->cfg.pap));
prompt_Printf(arg->prompt, " PROTOCOMP = %s\n",
command_ShowNegval(lcp->cfg.protocomp));
return 0;
}
static u_int32_t
GenerateMagic(void)
{
/* Generate random number which will be used as magic number */
randinit();
return (random());
}
void
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
lcp_Init(struct lcp *lcp, struct bundle *bundle, struct link *l,
const struct fsm_parent *parent)
{
/* Initialise ourselves */
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
int mincode = parent ? 1 : LCP_MINMPCODE;
static const char *timer_names[] =
{"LCP restart", "LCP openmode", "LCP stopped"};
fsm_Init(&lcp->fsm, "LCP", PROTO_LCP, mincode, LCP_MAXCODE, 10, LogLCP,
bundle, l, parent, &lcp_Callbacks, timer_names);
lcp->cfg.mru = DEF_MRU;
lcp->cfg.mtu = DEF_MTU;
lcp->cfg.accmap = 0;
lcp->cfg.openmode = 1;
lcp->cfg.lqrperiod = DEF_LQRPERIOD;
lcp->cfg.fsmretry = DEF_FSMRETRY;
lcp->cfg.acfcomp = NEG_ENABLED|NEG_ACCEPTED;
lcp->cfg.chap = NEG_ACCEPTED;
lcp->cfg.lqr = NEG_ACCEPTED;
lcp->cfg.pap = NEG_ACCEPTED;
lcp->cfg.protocomp = NEG_ENABLED|NEG_ACCEPTED;
lcp_Setup(lcp, lcp->cfg.openmode);
}
void
lcp_Setup(struct lcp *lcp, int openmode)
{
lcp->fsm.open_mode = openmode;
lcp->fsm.maxconfig = 10;
lcp->his_mru = DEF_MRU;
lcp->his_magic = 0;
lcp->his_lqrperiod = 0;
lcp->his_acfcomp = 0;
lcp->his_auth = 0;
lcp->want_mru = lcp->cfg.mru;
lcp->want_acfcomp = IsEnabled(lcp->cfg.acfcomp) ? 1 : 0;
if (lcp->fsm.parent) {
lcp->his_accmap = 0xffffffff;
lcp->want_accmap = lcp->cfg.accmap;
lcp->his_protocomp = 0;
lcp->want_protocomp = IsEnabled(lcp->cfg.protocomp) ? 1 : 0;
lcp->want_magic = GenerateMagic();
lcp->want_auth = IsEnabled(lcp->cfg.chap) ? PROTO_CHAP :
IsEnabled(lcp->cfg.pap) ? PROTO_PAP : 0;
lcp->want_lqrperiod = IsEnabled(lcp->cfg.lqr) ?
lcp->cfg.lqrperiod * 100 : 0;
} else {
lcp->his_accmap = lcp->want_accmap = 0;
lcp->his_protocomp = lcp->want_protocomp = 1;
lcp->want_magic = 0;
lcp->want_auth = 0;
lcp->want_lqrperiod = 0;
}
lcp->his_reject = lcp->my_reject = 0;
lcp->auth_iwait = lcp->auth_ineed = 0;
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
lcp->LcpFailedMagic = 0;
}
static void
LcpInitRestartCounter(struct fsm * fp)
{
/* Set fsm timer load */
struct lcp *lcp = fsm2lcp(fp);
fp->FsmTimer.load = lcp->cfg.fsmretry * SECTICKS;
fp->restart = 5;
}
static void
LcpSendConfigReq(struct fsm *fp)
{
/* Send config REQ please */
struct physical *p = link2physical(fp->link);
struct lcp *lcp = fsm2lcp(fp);
u_char buff[100];
struct lcp_opt *o;
if (!p) {
LogPrintf(LogERROR, "LcpSendConfigReq: Not a physical link !\n");
return;
}
o = (struct lcp_opt *)buff;
if (!Physical_IsSync(p)) {
if (lcp->want_acfcomp && !REJECTED(lcp, TY_ACFCOMP))
INC_LCP_OPT(TY_ACFCOMP, 2, o);
if (lcp->want_protocomp && !REJECTED(lcp, TY_PROTOCOMP))
INC_LCP_OPT(TY_PROTOCOMP, 2, o);
if (!REJECTED(lcp, TY_ACCMAP)) {
*(u_int32_t *)o->data = htonl(lcp->want_accmap);
INC_LCP_OPT(TY_ACCMAP, 6, o);
}
}
if (!REJECTED(lcp, TY_MRU)) {
*(u_short *)o->data = htons(lcp->want_mru);
INC_LCP_OPT(TY_MRU, 4, o);
}
if (lcp->want_magic && !REJECTED(lcp, TY_MAGICNUM)) {
*(u_int32_t *)o->data = htonl(lcp->want_magic);
INC_LCP_OPT(TY_MAGICNUM, 6, o);
}
if (lcp->want_lqrperiod && !REJECTED(lcp, TY_QUALPROTO)) {
*(u_short *)o->data = htons(PROTO_LQR);
*(u_long *)(o->data + 2) = htonl(lcp->want_lqrperiod);
INC_LCP_OPT(TY_QUALPROTO, 8, o);
}
switch (lcp->want_auth) {
case PROTO_PAP:
*(u_short *)o->data = htons(PROTO_PAP);
INC_LCP_OPT(TY_AUTHPROTO, 4, o);
break;
case PROTO_CHAP:
*(u_short *)o->data = htons(PROTO_CHAP);
o->data[2] = 0x05;
INC_LCP_OPT(TY_AUTHPROTO, 5, o);
break;
}
FsmOutput(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff);
}
void
lcp_SendProtoRej(struct lcp *lcp, u_char *option, int count)
{
/* Don't understand `option' */
FsmOutput(&lcp->fsm, CODE_PROTOREJ, lcp->fsm.reqid, option, count);
}
static void
LcpSentTerminateReq(struct fsm * fp)
{
/* Term REQ just sent by FSM */
}
static void
LcpSendTerminateAck(struct fsm *fp, u_char id)
{
/* Send Term ACK please */
FsmOutput(fp, CODE_TERMACK, id, NULL, 0);
}
static void
LcpLayerStart(struct fsm *fp)
{
/* We're about to start up ! */
struct lcp *lcp = fsm2lcp(fp);
LogPrintf(LogLCP, "LcpLayerStart\n");
lcp->LcpFailedMagic = 0;
}
static void
LcpLayerFinish(struct fsm *fp)
{
/* We're now down */
LogPrintf(LogLCP, "LcpLayerFinish\n");
}
static void
LcpLayerUp(struct fsm *fp)
{
/* We're now up */
struct physical *p = link2physical(fp->link);
struct lcp *lcp = fsm2lcp(fp);
LogPrintf(LogLCP, "LcpLayerUp\n");
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
async_SetLinkParams(&p->async, lcp);
StartLqm(lcp);
hdlc_StartTimer(&p->hdlc);
}
static void
LcpLayerDown(struct fsm *fp)
{
/* About to come down */
struct physical *p = link2physical(fp->link);
LogPrintf(LogLCP, "LcpLayerDown\n");
hdlc_StopTimer(&p->hdlc);
StopLqrTimer(p);
}
static void
1998-03-13 21:08:05 +00:00
LcpDecodeConfig(struct fsm *fp, u_char *cp, int plen, int mode_type,
struct fsm_decode *dec)
{
/* Deal with incoming PROTO_LCP */
struct lcp *lcp = fsm2lcp(fp);
int type, length, sz, pos;
u_int32_t *lp, magic, accmap;
u_short mtu, mru, *sp, proto;
struct lqrreq *req;
char request[20], desc[22];
while (plen >= sizeof(struct fsmconfig)) {
type = *cp;
length = cp[1];
if (type < 0 || type >= NCFTYPES)
snprintf(request, sizeof request, " <%d>[%d]", type, length);
else
snprintf(request, sizeof request, " %s[%d]", cftypes[type], length);
switch (type) {
case TY_MRU:
sp = (u_short *) (cp + 2);
mru = htons(*sp);
LogPrintf(LogLCP, "%s %d\n", request, mru);
switch (mode_type) {
case MODE_REQ:
mtu = lcp->cfg.mtu;
if (mtu == 0)
mtu = MAX_MTU;
if (mru > mtu) {
*sp = htons(mtu);
1998-03-13 21:08:05 +00:00
memcpy(dec->nakend, cp, 4);
dec->nakend += 4;
} else if (mru < MIN_MRU) {
*sp = htons(MIN_MRU);
1998-03-13 21:08:05 +00:00
memcpy(dec->nakend, cp, 4);
dec->nakend += 4;
} else {
lcp->his_mru = mru;
1998-03-13 21:08:05 +00:00
memcpy(dec->ackend, cp, 4);
dec->ackend += 4;
}
break;
case MODE_NAK:
if (mru >= MIN_MRU || mru <= MAX_MRU)
lcp->want_mru = mru;
break;
case MODE_REJ:
lcp->his_reject |= (1 << type);
break;
}
break;
case TY_ACCMAP:
lp = (u_int32_t *) (cp + 2);
accmap = htonl(*lp);
LogPrintf(LogLCP, "%s 0x%08lx\n", request, (u_long)accmap);
switch (mode_type) {
case MODE_REQ:
lcp->his_accmap = accmap;
1998-03-13 21:08:05 +00:00
memcpy(dec->ackend, cp, 6);
dec->ackend += 6;
break;
case MODE_NAK:
lcp->want_accmap = accmap;
break;
case MODE_REJ:
lcp->his_reject |= (1 << type);
break;
}
break;
case TY_AUTHPROTO:
sp = (u_short *) (cp + 2);
proto = ntohs(*sp);
switch (proto) {
case PROTO_PAP:
LogPrintf(LogLCP, "%s 0x%04x (PAP)\n", request, proto);
break;
case PROTO_CHAP:
LogPrintf(LogLCP, "%s 0x%04x (CHAP 0x%02x)\n", request, proto, cp[4]);
break;
default:
LogPrintf(LogLCP, "%s 0x%04x\n", request, proto);
break;
}
switch (mode_type) {
case MODE_REQ:
switch (proto) {
case PROTO_PAP:
if (length != 4) {
LogPrintf(LogLCP, " Bad length!\n");
goto reqreject;
}
if (IsAccepted(lcp->cfg.pap)) {
lcp->his_auth = proto;
1998-03-13 21:08:05 +00:00
memcpy(dec->ackend, cp, length);
dec->ackend += length;
} else if (IsAccepted(lcp->cfg.chap)) {
1998-03-13 21:08:05 +00:00
*dec->nakend++ = *cp;
*dec->nakend++ = 5;
*dec->nakend++ = (unsigned char) (PROTO_CHAP >> 8);
*dec->nakend++ = (unsigned char) PROTO_CHAP;
*dec->nakend++ = 0x05;
} else
goto reqreject;
break;
case PROTO_CHAP:
if (length < 5) {
LogPrintf(LogLCP, " Bad length!\n");
goto reqreject;
}
#ifdef HAVE_DES
if (IsAccepted(lcp->cfg.chap) && (cp[4] == 0x05 || cp[4] == 0x80))
#else
if (IsAccepted(lcp->cfg.chap) && cp[4] == 0x05)
#endif
{
lcp->his_auth = proto;
1998-03-13 21:08:05 +00:00
memcpy(dec->ackend, cp, length);
dec->ackend += length;
#ifdef HAVE_DES
link2physical(fp->link)->dl->chap.using_MSChap = cp[4] == 0x80;
#endif
} else if (IsAccepted(lcp->cfg.pap)) {
1998-03-13 21:08:05 +00:00
*dec->nakend++ = *cp;
*dec->nakend++ = 4;
*dec->nakend++ = (unsigned char) (PROTO_PAP >> 8);
*dec->nakend++ = (unsigned char) PROTO_PAP;
} else
goto reqreject;
break;
default:
LogPrintf(LogLCP, "%s 0x%04x - not recognised, NAK\n",
request, proto);
1998-03-13 21:08:05 +00:00
memcpy(dec->nakend, cp, length);
dec->nakend += length;
break;
}
break;
case MODE_NAK:
switch (proto) {
case PROTO_PAP:
if (IsEnabled(lcp->cfg.pap))
lcp->want_auth = PROTO_PAP;
else {
LogPrintf(LogLCP, "Peer will only send PAP (not enabled)\n");
lcp->his_reject |= (1 << type);
}
break;
case PROTO_CHAP:
if (IsEnabled(lcp->cfg.chap))
lcp->want_auth = PROTO_CHAP;
else {
LogPrintf(LogLCP, "Peer will only send CHAP (not enabled)\n");
lcp->his_reject |= (1 << type);
}
break;
default:
/* We've been NAK'd with something we don't understand :-( */
lcp->his_reject |= (1 << type);
break;
}
break;
case MODE_REJ:
lcp->his_reject |= (1 << type);
break;
}
break;
case TY_QUALPROTO:
req = (struct lqrreq *)cp;
LogPrintf(LogLCP, "%s proto %x, interval %dms\n",
request, ntohs(req->proto), ntohl(req->period) * 10);
switch (mode_type) {
case MODE_REQ:
if (ntohs(req->proto) != PROTO_LQR || !IsAccepted(lcp->cfg.lqr))
goto reqreject;
else {
lcp->his_lqrperiod = ntohl(req->period);
if (lcp->his_lqrperiod < 500)
lcp->his_lqrperiod = 500;
req->period = htonl(lcp->his_lqrperiod);
1998-03-13 21:08:05 +00:00
memcpy(dec->ackend, cp, length);
dec->ackend += length;
}
break;
case MODE_NAK:
break;
case MODE_REJ:
lcp->his_reject |= (1 << type);
break;
}
break;
case TY_MAGICNUM:
lp = (u_int32_t *) (cp + 2);
magic = ntohl(*lp);
LogPrintf(LogLCP, "%s 0x%08lx\n", request, (u_long)magic);
switch (mode_type) {
case MODE_REQ:
if (lcp->want_magic) {
/* Validate magic number */
if (magic == lcp->want_magic) {
LogPrintf(LogLCP, "Magic is same (%08lx) - %d times\n",
(u_long)magic, ++lcp->LcpFailedMagic);
lcp->want_magic = GenerateMagic();
1998-03-13 21:08:05 +00:00
memcpy(dec->nakend, cp, 6);
dec->nakend += 6;
ualarm(TICKUNIT * (4 + 4 * lcp->LcpFailedMagic), 0);
sigpause(0);
} else {
lcp->his_magic = magic;
1998-03-13 21:08:05 +00:00
memcpy(dec->ackend, cp, length);
dec->ackend += length;
lcp->LcpFailedMagic = 0;
}
} else {
lcp->my_reject |= (1 << type);
goto reqreject;
}
break;
case MODE_NAK:
LogPrintf(LogLCP, " Magic 0x%08lx is NAKed!\n", (u_long)magic);
lcp->want_magic = GenerateMagic();
break;
case MODE_REJ:
LogPrintf(LogLCP, " Magic 0x%08x is REJected!\n", magic);
lcp->want_magic = 0;
lcp->his_reject |= (1 << type);
break;
}
break;
case TY_PROTOCOMP:
LogPrintf(LogLCP, "%s\n", request);
switch (mode_type) {
case MODE_REQ:
if (IsAccepted(lcp->cfg.protocomp)) {
lcp->his_protocomp = 1;
1998-03-13 21:08:05 +00:00
memcpy(dec->ackend, cp, 2);
dec->ackend += 2;
} else {
#ifdef OLDMST
/*
* MorningStar before v1.3 needs NAK
*/
1998-03-13 21:08:05 +00:00
memcpy(dec->nakend, cp, 2);
dec->nakend += 2;
#else
1998-03-13 21:08:05 +00:00
memcpy(dec->rejend, cp, 2);
dec->rejend += 2;
lcp->my_reject |= (1 << type);
#endif
}
break;
case MODE_NAK:
case MODE_REJ:
lcp->want_protocomp = 0;
lcp->his_reject |= (1 << type);
break;
}
break;
case TY_ACFCOMP:
LogPrintf(LogLCP, "%s\n", request);
switch (mode_type) {
case MODE_REQ:
if (IsAccepted(lcp->cfg.acfcomp)) {
lcp->his_acfcomp = 1;
1998-03-13 21:08:05 +00:00
memcpy(dec->ackend, cp, 2);
dec->ackend += 2;
} else {
#ifdef OLDMST
/*
* MorningStar before v1.3 needs NAK
*/
1998-03-13 21:08:05 +00:00
memcpy(dec->nakend, cp, 2);
dec->nakend += 2;
#else
1998-03-13 21:08:05 +00:00
memcpy(dec->rejend, cp, 2);
dec->rejend += 2;
lcp->my_reject |= (1 << type);
#endif
}
break;
case MODE_NAK:
case MODE_REJ:
lcp->want_acfcomp = 0;
lcp->his_reject |= (1 << type);
break;
}
break;
case TY_SDP:
LogPrintf(LogLCP, "%s\n", request);
switch (mode_type) {
case MODE_REQ:
case MODE_NAK:
case MODE_REJ:
break;
}
break;
default:
sz = (sizeof desc - 2) / 2;
if (sz > length - 2)
sz = length - 2;
pos = 0;
desc[0] = sz ? ' ' : '\0';
for (pos = 0; sz--; pos++)
sprintf(desc+(pos<<1)+1, "%02x", cp[pos+2]);
LogPrintf(LogLCP, "%s%s\n", request, desc);
if (mode_type == MODE_REQ) {
reqreject:
1998-03-13 21:08:05 +00:00
if (length > sizeof dec->rej - (dec->rejend - dec->rej)) {
length = sizeof dec->rej - (dec->rejend - dec->rej);
LogPrintf(LogLCP, "Can't REJ length %d - trunating to %d\n",
cp[1], length);
}
1998-03-13 21:08:05 +00:00
memcpy(dec->rejend, cp, length);
dec->rejend += length;
lcp->my_reject |= (1 << type);
if (length != cp[1])
return;
}
break;
}
/* to avoid inf. loop */
if (length == 0) {
LogPrintf(LogLCP, "LCP size zero\n");
break;
}
plen -= length;
cp += length;
}
if (mode_type != MODE_NOP)
if (dec->rejend != dec->rej) {
/* rejects are preferred */
dec->ackend = dec->ack;
dec->nakend = dec->nak;
} else if (dec->nakend != dec->nak)
/* then NAKs */
dec->ackend = dec->ack;
}
void
LcpInput(struct lcp *lcp, struct mbuf * bp)
{
/* Got PROTO_LCP from link */
FsmInput(&lcp->fsm, bp);
}