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contiki/core/net/ppp/ipcp.c

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/*
*---------------------------------------------------------------------------
* ipcp.c - PPP IPCP (intrnet protocol) Processor/Handler
*
*---------------------------------------------------------------------------
*
* Version
* 0.1 Original Version Jun 3, 2000
*
*---------------------------------------------------------------------------
*
* Copyright (C) 2000, Mycal Labs www.mycal.com
*
*---------------------------------------------------------------------------
*/
/*
* Copyright (c) 2003, Mike Johnson, Mycal Labs, www.mycal.net
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mike Johnson/Mycal Labs
* www.mycal.net.
* 4. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file is part of the Mycal Modified uIP TCP/IP stack.
*
* $Id: ipcp.c,v 1.1 2006/06/17 22:48:09 adamdunkels Exp $
*
*/
/* */
/* include files */
/* */
#if 0
#define DEBUG1(x)
#else
#include <stdio.h>
#define DEBUG1(x) debug_printf x
#endif
#include "net/uip.h"
/*#include "time.h"*/
#include "ipcp.h"
#include "ppp.h"
#include "ahdlc.h"
#define TIMER_expire()
#define TIMER_set()
#define TIMER_timeout(x) 1
#ifdef IPCP_GET_PEER_IP
uip_ipaddr_t peer_ip_addr;
#endif
#ifdef IPCP_GET_PRI_DNS
uip_ipaddr_t pri_dns_addr;
#endif
#ifdef IPCP_GET_SEC_DNS
uip_ipaddr_t sec_dns_addr;
#endif
static unsigned long prev_ipcp_seconds = 0;
/*
* Local IPCP state
*/
u8_t ipcp_state;
/*
* in the future add copression protocol and name servers (possibly for servers only)
*/
u8_t ipcplist[] = {0x3, 0};
/*---------------------------------------------------------------------------*/
#if 1
void
printip(uip_ipaddr_t ip2)
{
char *ip = (u8_t*)ip2;
DEBUG1((" %d.%d.%d.%d ",ip[0],ip[1],ip[2],ip[3]));
}
#else
#define printip(x)
#endif
/*---------------------------------------------------------------------------*/
void
ipcp_init(void)
{
DEBUG1(("ipcp init\n"));
ipcp_state = 0;
ppp_retry = 0;
pppif.ipaddr[0] = pppif.ipaddr[1] = 0;
}
/*---------------------------------------------------------------------------*/
/*
* IPCP RX protocol Handler
*/
void
ipcp_rx(u8_t *buffer, u16_t count)
{
u8_t *bptr = buffer;
IPCPPKT *pkt=(IPCPPKT *)buffer;
u16_t len;
DEBUG1(("IPCP len %d\n",count));
switch(*bptr++) {
case CONF_REQ:
/* parce request and see if we can ACK it */
++bptr;
len = (*bptr++ << 8);
len |= *bptr++;
/* len-=2; */
DEBUG1(("check lcplist\n"));
if(scan_packet(IPCP, ipcplist, buffer, bptr, (u16_t)(len - 4))) {
DEBUG1(("option was bad\n"));
} else {
DEBUG1(("IPCP options are good\n"));
/*
* Parse out the results
*/
/* lets try to implement what peer wants */
/* Reject any protocol not */
/* Error? if we we need to send a config Reject ++++ this is
good for a subroutine*/
/* All we should get is the peer IP address */
if(IPCP_IPADDRESS == *bptr++) {
/* dump length */
++bptr;
#ifdef IPCP_GET_PEER_IP
((u8_t*)peer_ip_addr)[0] = *bptr++;
((u8_t*)peer_ip_addr)[1] = *bptr++;
((u8_t*)peer_ip_addr)[2] = *bptr++;
((u8_t*)peer_ip_addr)[3] = *bptr++;
DEBUG1(("Peer IP "));
/* printip(peer_ip_addr);*/
DEBUG1(("\n"));
#else
bptr += 4;
#endif
} else {
DEBUG1(("HMMMM this shouldn't happen IPCP1\n"));
}
#if 0
if(error) {
/* write the config NAK packet we've built above, take on the header */
bptr = buffer;
*bptr++ = CONF_NAK; /* Write Conf_rej */
*bptr++;
/*tptr++;*/ /* skip over ID */
/* Write new length */
*bptr++ = 0;
*bptr = tptr - buffer;
/* write the reject frame */
DEBUG1(("Writing NAK frame \n"));
ahdlc_tx(IPCP, buffer, (u16_t)(tptr - buffer));
DEBUG1(("- End NAK Write frame\n"));
} else {
}
#endif
/*
* If we get here then we are OK, lets send an ACK and tell the rest
* of our modules our negotiated config.
*/
ipcp_state |= IPCP_RX_UP;
DEBUG1(("Send IPCP ACK!\n"));
bptr = buffer;
*bptr++ = CONF_ACK; /* Write Conf_ACK */
bptr++; /* Skip ID (send same one) */
/*
* Set stuff
*/
/* ppp_flags |= tflag; */
DEBUG1(("SET- stuff -- are we up? c=%d dif=%d \n", count, (u16_t)(bptr-buffer)));
/* write the ACK frame */
DEBUG1(("Writing ACK frame \n"));
/* Send packet ahdlc_txz(procol,header,data,headerlen,datalen); */
ahdlc_tx(IPCP, 0, buffer, 0, count /*bptr-buffer*/);
DEBUG1(("- End ACK Write frame\n"));
/* expire the timer to make things happen after a state change */
/*timer_expire(); */
/* } */
}
break;
case CONF_ACK: /* config Ack */
DEBUG1(("CONF ACK\n"));
/*
* Parse out the results
*
* Dump the ID and get the length.
*/
/* dump the ID */
bptr++;
/* get the length */
len = (*bptr++ << 8);
len |= *bptr++;
#if 0
/* Parse ACK and set data */
while(bptr < buffer + len) {
switch(*bptr++) {
case IPCP_IPADDRESS:
/* dump length */
bptr++;
((u8_t*)ipaddr)[0] = *bptr++;
((u8_t*)ipaddr)[1] = *bptr++;
((u8_t*)ipaddr)[2] = *bptr++;
((u8_t*)ipaddr)[3] = *bptr++;
break;
case IPCP_PRIMARY_DNS:
bptr++;
((u8_t*)pri_dns_addr)[0] = *bptr++;
((u8_t*)pri_dns_addr)[1] = *bptr++;
((u8_t*)pri_dns_addr)[2] = *bptr++;
((u8_t*)pri_dns_addr)[3] = *bptr++;
break;
case IPCP_SECONDARY_DNS:
bptr++;
((u8_t*)sec_dns_addr)[0] = *bptr++;
((u8_t*)sec_dns_addr)[1] = *bptr++;
((u8_t*)sec_dns_addr)[2] = *bptr++;
((u8_t*)sec_dns_addr)[3] = *bptr++;
break;
default:
DEBUG1(("IPCP CONFIG_ACK problem1\n"));
}
}
#endif
ipcp_state |= IPCP_TX_UP;
/*ipcp_state &= ~IPCP_RX_UP;*/
DEBUG1(("were up! \n"));
printip(pppif.ipaddr);
#ifdef IPCP_GET_PRI_DNS
printip(pri_dns_addr);
#endif
#ifdef IPCP_GET_SEC_DNS
printip(sec_dns_addr);
#endif
DEBUG1(("\n"));
/* expire the timer to make things happen after a state change */
TIMER_expire();
break;
case CONF_NAK: /* Config Nack */
DEBUG1(("CONF NAK\n"));
/* dump the ID */
bptr++;
/* get the length */
len = (*bptr++ << 8);
len |= *bptr++;
/* Parse ACK and set data */
while(bptr < buffer + len) {
switch(*bptr++) {
case IPCP_IPADDRESS:
/* dump length */
bptr++;
((u8_t*)pppif.ipaddr)[0] = *bptr++;
((u8_t*)pppif.ipaddr)[1] = *bptr++;
((u8_t*)pppif.ipaddr)[2] = *bptr++;
((u8_t*)pppif.ipaddr)[3] = *bptr++;
uip_fw_register( &pppif );
DEBUG1(("My PPP-ipno: (%d.%d.%d.%d)\n", ((u8_t*)pppif.ipaddr)[0], ((u8_t*)pppif.ipaddr)[1], ((u8_t*)pppif.ipaddr)[2], ((u8_t*)pppif.ipaddr)[3]));
break;
#ifdef IPCP_GET_PRI_DNS
case IPCP_PRIMARY_DNS:
bptr++;
((u8_t*)pri_dns_addr)[0] = *bptr++;
((u8_t*)pri_dns_addr)[1] = *bptr++;
((u8_t*)pri_dns_addr)[2] = *bptr++;
((u8_t*)pri_dns_addr)[3] = *bptr++;
break;
#endif
#ifdef IPCP_GET_SEC_DNS
case IPCP_SECONDARY_DNS:
bptr++;
((u8_t*)sec_dns_addr)[0] = *bptr++;
((u8_t*)sec_dns_addr)[1] = *bptr++;
((u8_t*)sec_dns_addr)[2] = *bptr++;
((u8_t*)sec_dns_addr)[3] = *bptr++;
break;
#endif
default:
DEBUG1(("IPCP CONFIG_ACK problem 2\n"));
}
}
ppp_id++;
printip(pppif.ipaddr);
#ifdef IPCP_GET_PRI_DNS
printip(pri_dns_addr);
#endif
#ifdef IPCP_GET_PRI_DNS
printip(sec_dns_addr);
#endif
DEBUG1(("\n"));
/* expire the timer to make things happen after a state change */
TIMER_expire();
break;
case CONF_REJ: /* Config Reject */
DEBUG1(("CONF REJ\n"));
/* Remove the offending options*/
ppp_id++;
/* dump the ID */
bptr++;
/* get the length */
len = (*bptr++ << 8);
len |= *bptr++;
/* Parse ACK and set data */
while(bptr < buffer + len) {
switch(*bptr++) {
case IPCP_IPADDRESS:
ipcp_state |= IPCP_IP_BIT;
bptr += 5;
break;
#ifdef IPCP_GET_PRI_DNS
case IPCP_PRIMARY_DNS:
ipcp_state |= IPCP_PRI_DNS_BIT;
bptr += 5;
break;
#endif
#ifdef IPCP_GET_PRI_DNS
case IPCP_SECONDARY_DNS:
ipcp_state |= IPCP_SEC_DNS_BIT;
bptr += 5;
break;
#endif
default:
DEBUG1(("IPCP this shoudln't happen 3\n"));
}
}
/* expire the timer to make things happen after a state change */
/*timer_expire(); */
break;
default:
DEBUG1(("-Unknown 4\n"));
}
}
/*---------------------------------------------------------------------------*/
void
ipcp_task(u8_t *buffer)
{
u8_t *bptr;
u16_t t;
IPCPPKT *pkt;
/* IPCP tx not up and hasn't timed out then lets see if we need to
send a request */
if(!(ipcp_state & IPCP_TX_UP) && !(ipcp_state & IPCP_TX_TIMEOUT)) {
/* Check if we have a request pending */
/*t=get_seconds()-ipcp_tx_time;*/
#if 0
if(TIMER_timeout(IPCP_TIMEOUT)) {
#else
if((clock_seconds() - prev_ipcp_seconds) > IPCP_TIMEOUT) {
prev_ipcp_seconds = clock_seconds();
#endif
/*
* No pending request, lets build one
*/
pkt=(IPCPPKT *)buffer;
/* Configure-Request only here, write id */
pkt->code = CONF_REQ;
pkt->id = ppp_id;
bptr = pkt->data;
/*
* Write options, we want IP address, and DNS addresses if set.
*/
/* Write zeros for IP address the first time */
*bptr++ = IPCP_IPADDRESS;
*bptr++ = 0x6;
*bptr++ = ((u8_t*)pppif.ipaddr)[0];
*bptr++ = ((u8_t*)pppif.ipaddr)[1];
*bptr++ = ((u8_t*)pppif.ipaddr)[2];
*bptr++ = ((u8_t*)pppif.ipaddr)[3];
#ifdef IPCP_GET_PRI_DNS
if(!(ipcp_state & IPCP_PRI_DNS_BIT)) {
/* Write zeros for IP address the first time */
*bptr++ = IPCP_PRIMARY_DNS;
*bptr++ = 0x6;
*bptr++ = ((u8_t*)pri_dns_addr)[0];
*bptr++ = ((u8_t*)pri_dns_addr)[1];
*bptr++ = ((u8_t*)pri_dns_addr)[2];
*bptr++ = ((u8_t*)pri_dns_addr)[3];
}
#endif
#ifdef IPCP_GET_SEC_DNS
if(!(ipcp_state & IPCP_SEC_DNS_BIT)) {
/* Write zeros for IP address the first time */
*bptr++ = IPCP_SECONDARY_DNS;
*bptr++ = 0x6;
*bptr++ = ((u8_t*)sec_dns_addr)[0];
*bptr++ = ((u8_t*)sec_dns_addr)[1];
*bptr++ = ((u8_t*)sec_dns_addr)[2];
*bptr++ = ((u8_t*)sec_dns_addr)[3];
}
#endif
/* Write length */
t = bptr - buffer;
/* length here - code and ID + */
pkt->len = htons(t);
DEBUG1(("\n**Sending IPCP Request packet\n"));
/* Send packet ahdlc_txz(procol,header,data,headerlen,datalen); */
ahdlc_tx(IPCP, 0, buffer, 0, t);
/* Set timer */
/*ipcp_tx_time=get_seconds();*/
TIMER_set();
/* Inc retry */
/*ipcp_retry++;*/
ppp_retry++;
/*
* Have we timed out? (combide the timers?)
*/
if(ppp_retry > IPCP_RETRY_COUNT)
ipcp_state &= IPCP_TX_TIMEOUT;
}
}
}
/*---------------------------------------------------------------------------*/
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