49052c9523
multilink ('cos I've seen my ISP REQ it without multilink).
Setting MRRU is ifdef'd out until it's debugged and we can
merge -direct links with other running programs.
Fix MTU setting.
1089 lines
32 KiB
C
1089 lines
32 KiB
C
/*
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* PPP IP Control Protocol (IPCP) Module
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*
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* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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*
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* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the Internet Initiative Japan, Inc. The name of the
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* IIJ may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: ipcp.c,v 1.50.2.41 1998/04/21 01:02:15 brian Exp $
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*
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* TODO:
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* o More RFC1772 backwoard compatibility
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*/
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#include <sys/param.h>
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#include <netinet/in_systm.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <net/if.h>
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#include <sys/sockio.h>
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#include <fcntl.h>
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#include <resolv.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/errno.h>
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#include <termios.h>
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#include <unistd.h>
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#include "command.h"
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#include "mbuf.h"
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#include "log.h"
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#include "defs.h"
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#include "timer.h"
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#include "fsm.h"
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#include "lcpproto.h"
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#include "lcp.h"
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#include "iplist.h"
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#include "throughput.h"
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#include "slcompress.h"
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#include "ipcp.h"
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#include "filter.h"
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#include "descriptor.h"
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#include "loadalias.h"
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#include "vjcomp.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "async.h"
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#include "ccp.h"
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#include "link.h"
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#include "physical.h"
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#include "mp.h"
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#include "bundle.h"
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#include "id.h"
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#include "arp.h"
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#include "systems.h"
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#include "prompt.h"
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#undef REJECTED
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#define REJECTED(p, x) ((p)->peer_reject & (1<<(x)))
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#define issep(ch) ((ch) == ' ' || (ch) == '\t')
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#define isip(ch) (((ch) >= '0' && (ch) <= '9') || (ch) == '.')
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struct compreq {
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u_short proto;
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u_char slots;
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u_char compcid;
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};
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static void IpcpLayerUp(struct fsm *);
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static void IpcpLayerDown(struct fsm *);
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static void IpcpLayerStart(struct fsm *);
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static void IpcpLayerFinish(struct fsm *);
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static void IpcpInitRestartCounter(struct fsm *);
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static void IpcpSendConfigReq(struct fsm *);
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static void IpcpSentTerminateReq(struct fsm *);
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static void IpcpSendTerminateAck(struct fsm *, u_char);
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static void IpcpDecodeConfig(struct fsm *, u_char *, int, int,
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struct fsm_decode *);
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static struct fsm_callbacks ipcp_Callbacks = {
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IpcpLayerUp,
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IpcpLayerDown,
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IpcpLayerStart,
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IpcpLayerFinish,
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IpcpInitRestartCounter,
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IpcpSendConfigReq,
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IpcpSentTerminateReq,
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IpcpSendTerminateAck,
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IpcpDecodeConfig,
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NullRecvResetReq,
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NullRecvResetAck
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};
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static const char *cftypes[] = {
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/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
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"???",
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"IPADDRS", /* 1: IP-Addresses */ /* deprecated */
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"COMPPROTO", /* 2: IP-Compression-Protocol */
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"IPADDR", /* 3: IP-Address */
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};
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#define NCFTYPES (sizeof cftypes/sizeof cftypes[0])
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static const char *cftypes128[] = {
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/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
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"???",
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"PRIDNS", /* 129: Primary DNS Server Address */
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"PRINBNS", /* 130: Primary NBNS Server Address */
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"SECDNS", /* 131: Secondary DNS Server Address */
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"SECNBNS", /* 132: Secondary NBNS Server Address */
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};
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#define NCFTYPES128 (sizeof cftypes128/sizeof cftypes128[0])
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void
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ipcp_AddInOctets(struct ipcp *ipcp, int n)
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{
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throughput_addin(&ipcp->throughput, n);
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}
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void
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ipcp_AddOutOctets(struct ipcp *ipcp, int n)
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{
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throughput_addout(&ipcp->throughput, n);
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}
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static void
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getdns(struct ipcp *ipcp, struct in_addr addr[2])
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{
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FILE *fp;
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addr[0].s_addr = addr[1].s_addr = INADDR_ANY;
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if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
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char buf[LINE_LEN], *cp, *end;
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int n;
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n = 0;
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buf[sizeof buf - 1] = '\0';
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while (fgets(buf, sizeof buf - 1, fp)) {
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if (!strncmp(buf, "nameserver", 10) && issep(buf[10])) {
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for (cp = buf + 11; issep(*cp); cp++)
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;
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for (end = cp; isip(*end); end++)
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;
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*end = '\0';
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if (inet_aton(cp, addr+n) && ++n == 2)
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break;
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}
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}
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if (n == 1)
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addr[1] = addr[0];
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fclose(fp);
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}
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}
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static int
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setdns(struct ipcp *ipcp, struct in_addr addr[2])
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{
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FILE *fp;
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char wbuf[LINE_LEN + 54];
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int wlen;
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if (addr[0].s_addr == INADDR_ANY || addr[1].s_addr == INADDR_ANY) {
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struct in_addr old[2];
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getdns(ipcp, old);
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if (addr[0].s_addr == INADDR_ANY)
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addr[0] = old[0];
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if (addr[1].s_addr == INADDR_ANY)
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addr[1] = old[1];
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}
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if (addr[0].s_addr == INADDR_ANY && addr[1].s_addr == INADDR_ANY) {
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LogPrintf(LogWARN, "%s not modified: All nameservers NAKd\n",
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_PATH_RESCONF);
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return 0;
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}
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wlen = 0;
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if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
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char buf[LINE_LEN];
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int len;
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buf[sizeof buf - 1] = '\0';
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while (fgets(buf, sizeof buf - 1, fp)) {
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if (strncmp(buf, "nameserver", 10) || !issep(buf[10])) {
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len = strlen(buf);
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if (len > sizeof wbuf - wlen) {
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LogPrintf(LogWARN, "%s: Can only cope with max file size %d\n",
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_PATH_RESCONF, LINE_LEN);
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fclose(fp);
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return 0;
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}
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memcpy(wbuf + wlen, buf, len);
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wlen += len;
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}
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}
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fclose(fp);
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}
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if (addr[0].s_addr != INADDR_ANY) {
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snprintf(wbuf + wlen, sizeof wbuf - wlen, "nameserver %s\n",
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inet_ntoa(addr[0]));
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LogPrintf(LogIPCP, "Primary nameserver set to %s", wbuf + wlen + 11);
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wlen += strlen(wbuf + wlen);
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}
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if (addr[1].s_addr != INADDR_ANY && addr[1].s_addr != addr[0].s_addr) {
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snprintf(wbuf + wlen, sizeof wbuf - wlen, "nameserver %s\n",
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inet_ntoa(addr[1]));
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LogPrintf(LogIPCP, "Secondary nameserver set to %s", wbuf + wlen + 11);
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wlen += strlen(wbuf + wlen);
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}
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if (wlen) {
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int fd;
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if ((fd = ID0open(_PATH_RESCONF, O_WRONLY|O_CREAT, 0644)) != -1) {
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if (write(fd, wbuf, wlen) != wlen) {
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LogPrintf(LogERROR, "setdns: write(): %s\n", strerror(errno));
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close(fd);
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return 0;
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}
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if (ftruncate(fd, wlen) == -1) {
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LogPrintf(LogERROR, "setdns: truncate(): %s\n", strerror(errno));
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close(fd);
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return 0;
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}
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close(fd);
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} else {
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LogPrintf(LogERROR, "setdns: open(): %s\n", strerror(errno));
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return 0;
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}
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}
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return 1;
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}
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int
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ReportIpcpStatus(struct cmdargs const *arg)
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{
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prompt_Printf(arg->prompt, "%s [%s]\n", arg->bundle->ncp.ipcp.fsm.name,
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State2Nam(arg->bundle->ncp.ipcp.fsm.state));
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if (arg->bundle->ncp.ipcp.fsm.state == ST_OPENED) {
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prompt_Printf(arg->prompt, " His side: %s, %s\n",
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inet_ntoa(arg->bundle->ncp.ipcp.peer_ip),
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vj2asc(arg->bundle->ncp.ipcp.peer_compproto));
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prompt_Printf(arg->prompt, " My side: %s, %s\n",
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inet_ntoa(arg->bundle->ncp.ipcp.my_ip),
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vj2asc(arg->bundle->ncp.ipcp.my_compproto));
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}
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prompt_Printf(arg->prompt, "\nDefaults:\n");
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prompt_Printf(arg->prompt, " My Address: %s/%d\n",
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inet_ntoa(arg->bundle->ncp.ipcp.cfg.my_range.ipaddr),
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arg->bundle->ncp.ipcp.cfg.my_range.width);
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if (iplist_isvalid(&arg->bundle->ncp.ipcp.cfg.peer_list))
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prompt_Printf(arg->prompt, " His Address: %s\n",
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arg->bundle->ncp.ipcp.cfg.peer_list.src);
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else
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prompt_Printf(arg->prompt, " His Address: %s/%d\n",
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inet_ntoa(arg->bundle->ncp.ipcp.cfg.peer_range.ipaddr),
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arg->bundle->ncp.ipcp.cfg.peer_range.width);
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prompt_Printf(arg->prompt, " DNS: %s, ",
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inet_ntoa(arg->bundle->ncp.ipcp.cfg.ns.dns[0]));
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prompt_Printf(arg->prompt, "%s\n",
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inet_ntoa(arg->bundle->ncp.ipcp.cfg.ns.dns[1]));
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prompt_Printf(arg->prompt, " NetBIOS NS: %s, ",
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inet_ntoa(arg->bundle->ncp.ipcp.cfg.ns.nbns[0]));
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prompt_Printf(arg->prompt, "%s\n",
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inet_ntoa(arg->bundle->ncp.ipcp.cfg.ns.nbns[1]));
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prompt_Printf(arg->prompt, "\nNegotiation:\n");
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if (arg->bundle->ncp.ipcp.cfg.HaveTriggerAddress)
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prompt_Printf(arg->prompt, " Trigger Address: %s\n",
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inet_ntoa(arg->bundle->ncp.ipcp.cfg.TriggerAddress));
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else
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prompt_Printf(arg->prompt, " Trigger Address: MYADDR\n");
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prompt_Printf(arg->prompt, " DNS: %s\n",
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command_ShowNegval(arg->bundle->ncp.ipcp.cfg.ns.dns_neg));
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prompt_Printf(arg->prompt, " VJ compression: %s (%d slots %s slot "
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"compression)\n",
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command_ShowNegval(arg->bundle->ncp.ipcp.cfg.vj.neg),
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arg->bundle->ncp.ipcp.cfg.vj.slots,
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arg->bundle->ncp.ipcp.cfg.vj.slotcomp ? "with" : "without");
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prompt_Printf(arg->prompt, "\n");
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throughput_disp(&arg->bundle->ncp.ipcp.throughput, arg->prompt);
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return 0;
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}
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int
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SetInitVJ(struct cmdargs const *arg)
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{
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if (arg->argc != arg->argn+2)
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return -1;
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if (!strcasecmp(arg->argv[arg->argn], "slots")) {
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int slots;
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slots = atoi(arg->argv[arg->argn+1]);
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if (slots < 4 || slots > 16)
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return 1;
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arg->bundle->ncp.ipcp.cfg.vj.slots = slots;
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return 0;
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} else if (!strcasecmp(arg->argv[arg->argn], "slotcomp")) {
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if (!strcasecmp(arg->argv[arg->argn+1], "on"))
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arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 1;
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else if (!strcasecmp(arg->argv[arg->argn+1], "off"))
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arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 0;
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else
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return 2;
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return 0;
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}
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return -1;
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}
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|
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void
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ipcp_Init(struct ipcp *ipcp, struct bundle *bundle, struct link *l,
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const struct fsm_parent *parent)
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{
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struct hostent *hp;
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char name[MAXHOSTNAMELEN];
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static const char *timer_names[] =
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{"IPCP restart", "IPCP openmode", "IPCP stopped"};
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fsm_Init(&ipcp->fsm, "IPCP", PROTO_IPCP, 1, IPCP_MAXCODE, 10, LogIPCP,
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bundle, l, parent, &ipcp_Callbacks, timer_names);
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ipcp->cfg.vj.slots = DEF_VJ_STATES;
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ipcp->cfg.vj.slotcomp = 1;
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memset(&ipcp->cfg.my_range, '\0', sizeof ipcp->cfg.my_range);
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if (gethostname(name, sizeof name) == 0) {
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hp = gethostbyname(name);
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if (hp && hp->h_addrtype == AF_INET) {
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memcpy(&ipcp->cfg.my_range.ipaddr.s_addr, hp->h_addr, hp->h_length);
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ipcp->cfg.peer_range.mask.s_addr = INADDR_BROADCAST;
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ipcp->cfg.peer_range.width = 32;
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}
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}
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ipcp->cfg.netmask.s_addr = INADDR_ANY;
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memset(&ipcp->cfg.peer_range, '\0', sizeof ipcp->cfg.peer_range);
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iplist_setsrc(&ipcp->cfg.peer_list, "");
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ipcp->cfg.HaveTriggerAddress = 0;
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|
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ipcp->cfg.ns.dns[0].s_addr = INADDR_ANY;
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ipcp->cfg.ns.dns[1].s_addr = INADDR_ANY;
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ipcp->cfg.ns.dns_neg = 0;
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ipcp->cfg.ns.nbns[0].s_addr = INADDR_ANY;
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ipcp->cfg.ns.nbns[1].s_addr = INADDR_ANY;
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|
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ipcp->cfg.fsmretry = DEF_FSMRETRY;
|
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ipcp->cfg.vj.neg = NEG_ENABLED|NEG_ACCEPTED;
|
|
|
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memset(&ipcp->vj, '\0', sizeof ipcp->vj);
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|
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ipcp->my_ifip.s_addr = INADDR_ANY;
|
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ipcp->peer_ifip.s_addr = INADDR_ANY;
|
|
|
|
throughput_init(&ipcp->throughput);
|
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ipcp_Setup(ipcp);
|
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}
|
|
|
|
void
|
|
ipcp_Setup(struct ipcp *ipcp)
|
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{
|
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int pos;
|
|
|
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ipcp->fsm.open_mode = 0;
|
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ipcp->fsm.maxconfig = 10;
|
|
|
|
if (iplist_isvalid(&ipcp->cfg.peer_list)) {
|
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if (ipcp->my_ifip.s_addr != INADDR_ANY &&
|
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(pos = iplist_ip2pos(&ipcp->cfg.peer_list, ipcp->my_ifip)) != -1)
|
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ipcp->cfg.peer_range.ipaddr = iplist_setcurpos(&ipcp->cfg.peer_list, pos);
|
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else
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ipcp->cfg.peer_range.ipaddr = iplist_setrandpos(&ipcp->cfg.peer_list);
|
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ipcp->cfg.peer_range.mask.s_addr = INADDR_BROADCAST;
|
|
ipcp->cfg.peer_range.width = 32;
|
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}
|
|
|
|
ipcp->heis1172 = 0;
|
|
|
|
ipcp->peer_ip = ipcp->cfg.peer_range.ipaddr;
|
|
ipcp->peer_compproto = 0;
|
|
|
|
if (ipcp->cfg.HaveTriggerAddress) {
|
|
/*
|
|
* Some implementations of PPP require that we send a
|
|
* *special* value as our address, even though the rfc specifies
|
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* full negotiation (e.g. "0.0.0.0" or Not "0.0.0.0").
|
|
*/
|
|
ipcp->my_ip = ipcp->cfg.TriggerAddress;
|
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LogPrintf(LogIPCP, "Using trigger address %s\n",
|
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inet_ntoa(ipcp->cfg.TriggerAddress));
|
|
} else if ((ipcp->my_ifip.s_addr & ipcp->cfg.my_range.mask.s_addr) ==
|
|
(ipcp->cfg.my_range.ipaddr.s_addr &
|
|
ipcp->cfg.my_range.mask.s_addr))
|
|
/*
|
|
* Otherwise, if we've been assigned an IP number before, we really
|
|
* want to keep the same IP number so that we can keep any existing
|
|
* connections that are bound to that IP.
|
|
*/
|
|
ipcp->my_ip = ipcp->my_ifip;
|
|
else
|
|
ipcp->my_ip = ipcp->cfg.my_range.ipaddr;
|
|
|
|
if (IsEnabled(ipcp->cfg.vj.neg))
|
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ipcp->my_compproto = (PROTO_VJCOMP << 16) +
|
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((ipcp->cfg.vj.slots - 1) << 8) +
|
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ipcp->cfg.vj.slotcomp;
|
|
else
|
|
ipcp->my_compproto = 0;
|
|
sl_compress_init(&ipcp->vj.cslc, ipcp->cfg.vj.slots - 1);
|
|
|
|
ipcp->peer_reject = 0;
|
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ipcp->my_reject = 0;
|
|
|
|
throughput_stop(&ipcp->throughput);
|
|
throughput_init(&ipcp->throughput);
|
|
}
|
|
|
|
static int
|
|
ipcp_SetIPaddress(struct bundle *bundle, struct in_addr myaddr,
|
|
struct in_addr hisaddr, int silent)
|
|
{
|
|
struct sockaddr_in *sock_in;
|
|
int s;
|
|
u_long mask, addr;
|
|
struct ifaliasreq ifra;
|
|
|
|
/* If given addresses are alreay set, then ignore this request */
|
|
if (bundle->ncp.ipcp.my_ifip.s_addr == myaddr.s_addr &&
|
|
bundle->ncp.ipcp.peer_ifip.s_addr == hisaddr.s_addr)
|
|
return 0;
|
|
|
|
IpcpCleanInterface(&bundle->ncp.ipcp);
|
|
|
|
s = ID0socket(AF_INET, SOCK_DGRAM, 0);
|
|
if (s < 0) {
|
|
LogPrintf(LogERROR, "SetIpDevice: socket(): %s\n", strerror(errno));
|
|
return (-1);
|
|
}
|
|
|
|
memset(&ifra, '\0', sizeof ifra);
|
|
strncpy(ifra.ifra_name, bundle->ifname, sizeof ifra.ifra_name - 1);
|
|
ifra.ifra_name[sizeof ifra.ifra_name - 1] = '\0';
|
|
|
|
/* Set interface address */
|
|
sock_in = (struct sockaddr_in *)&ifra.ifra_addr;
|
|
sock_in->sin_family = AF_INET;
|
|
sock_in->sin_addr = myaddr;
|
|
sock_in->sin_len = sizeof *sock_in;
|
|
|
|
/* Set destination address */
|
|
sock_in = (struct sockaddr_in *)&ifra.ifra_broadaddr;
|
|
sock_in->sin_family = AF_INET;
|
|
sock_in->sin_addr = hisaddr;
|
|
sock_in->sin_len = sizeof *sock_in;
|
|
|
|
addr = ntohl(myaddr.s_addr);
|
|
if (IN_CLASSA(addr))
|
|
mask = IN_CLASSA_NET;
|
|
else if (IN_CLASSB(addr))
|
|
mask = IN_CLASSB_NET;
|
|
else
|
|
mask = IN_CLASSC_NET;
|
|
|
|
/* if subnet mask is given, use it instead of class mask */
|
|
if (bundle->ncp.ipcp.cfg.netmask.s_addr != INADDR_ANY &&
|
|
(ntohl(bundle->ncp.ipcp.cfg.netmask.s_addr) & mask) == mask)
|
|
mask = ntohl(bundle->ncp.ipcp.cfg.netmask.s_addr);
|
|
|
|
sock_in = (struct sockaddr_in *)&ifra.ifra_mask;
|
|
sock_in->sin_family = AF_INET;
|
|
sock_in->sin_addr.s_addr = htonl(mask);
|
|
sock_in->sin_len = sizeof *sock_in;
|
|
|
|
if (ID0ioctl(s, SIOCAIFADDR, &ifra) < 0) {
|
|
if (!silent)
|
|
LogPrintf(LogERROR, "SetIpDevice: ioctl(SIOCAIFADDR): %s\n",
|
|
strerror(errno));
|
|
close(s);
|
|
return (-1);
|
|
}
|
|
|
|
bundle->ncp.ipcp.peer_ifip.s_addr = hisaddr.s_addr;
|
|
bundle->ncp.ipcp.my_ifip.s_addr = myaddr.s_addr;
|
|
|
|
if (Enabled(bundle, OPT_PROXY))
|
|
sifproxyarp(bundle, bundle->ncp.ipcp.peer_ifip, s);
|
|
|
|
close(s);
|
|
return (0);
|
|
}
|
|
|
|
static struct in_addr
|
|
ChooseHisAddr(struct bundle *bundle, const struct in_addr gw)
|
|
{
|
|
struct in_addr try;
|
|
int f;
|
|
|
|
for (f = 0; f < bundle->ncp.ipcp.cfg.peer_list.nItems; f++) {
|
|
try = iplist_next(&bundle->ncp.ipcp.cfg.peer_list);
|
|
LogPrintf(LogDEBUG, "ChooseHisAddr: Check item %d (%s)\n",
|
|
f, inet_ntoa(try));
|
|
if (ipcp_SetIPaddress(bundle, gw, try, 1) == 0) {
|
|
LogPrintf(LogIPCP, "ChooseHisAddr: Selected IP address %s\n",
|
|
inet_ntoa(try));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (f == bundle->ncp.ipcp.cfg.peer_list.nItems) {
|
|
LogPrintf(LogDEBUG, "ChooseHisAddr: All addresses in use !\n");
|
|
try.s_addr = INADDR_ANY;
|
|
}
|
|
|
|
return try;
|
|
}
|
|
|
|
static void
|
|
IpcpInitRestartCounter(struct fsm * fp)
|
|
{
|
|
/* Set fsm timer load */
|
|
struct ipcp *ipcp = fsm2ipcp(fp);
|
|
|
|
fp->FsmTimer.load = ipcp->cfg.fsmretry * SECTICKS;
|
|
fp->restart = 5;
|
|
}
|
|
|
|
static void
|
|
IpcpSendConfigReq(struct fsm *fp)
|
|
{
|
|
/* Send config REQ please */
|
|
struct physical *p = link2physical(fp->link);
|
|
struct ipcp *ipcp = fsm2ipcp(fp);
|
|
u_char buff[24];
|
|
struct lcp_opt *o;
|
|
|
|
o = (struct lcp_opt *)buff;
|
|
|
|
if ((p && !Physical_IsSync(p)) || !REJECTED(ipcp, TY_IPADDR)) {
|
|
*(u_int32_t *)o->data = ipcp->my_ip.s_addr;
|
|
INC_LCP_OPT(TY_IPADDR, 6, o);
|
|
}
|
|
|
|
if (ipcp->my_compproto && !REJECTED(ipcp, TY_COMPPROTO))
|
|
if (ipcp->heis1172) {
|
|
*(u_short *)o->data = htons(PROTO_VJCOMP);
|
|
INC_LCP_OPT(TY_COMPPROTO, 4, o);
|
|
} else {
|
|
*(u_long *)o->data = htonl(ipcp->my_compproto);
|
|
INC_LCP_OPT(TY_COMPPROTO, 6, o);
|
|
}
|
|
|
|
if (IsEnabled(ipcp->cfg.ns.dns_neg) &&
|
|
!REJECTED(ipcp, TY_PRIMARY_DNS - TY_ADJUST_NS) &&
|
|
!REJECTED(ipcp, TY_SECONDARY_DNS - TY_ADJUST_NS)) {
|
|
struct in_addr dns[2];
|
|
getdns(ipcp, dns);
|
|
*(u_int32_t *)o->data = dns[0].s_addr;
|
|
INC_LCP_OPT(TY_PRIMARY_DNS, 6, o);
|
|
*(u_int32_t *)o->data = dns[1].s_addr;
|
|
INC_LCP_OPT(TY_SECONDARY_DNS, 6, o);
|
|
}
|
|
|
|
FsmOutput(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff);
|
|
}
|
|
|
|
static void
|
|
IpcpSentTerminateReq(struct fsm * fp)
|
|
{
|
|
/* Term REQ just sent by FSM */
|
|
}
|
|
|
|
static void
|
|
IpcpSendTerminateAck(struct fsm *fp, u_char id)
|
|
{
|
|
/* Send Term ACK please */
|
|
FsmOutput(fp, CODE_TERMACK, id, NULL, 0);
|
|
}
|
|
|
|
static void
|
|
IpcpLayerStart(struct fsm * fp)
|
|
{
|
|
/* We're about to start up ! */
|
|
LogPrintf(LogIPCP, "IpcpLayerStart.\n");
|
|
|
|
/* This is where we should be setting up the interface in DEMAND mode */
|
|
}
|
|
|
|
static void
|
|
IpcpLayerFinish(struct fsm *fp)
|
|
{
|
|
/* We're now down */
|
|
LogPrintf(LogIPCP, "IpcpLayerFinish.\n");
|
|
}
|
|
|
|
void
|
|
IpcpCleanInterface(struct ipcp *ipcp)
|
|
{
|
|
struct ifaliasreq ifra;
|
|
struct sockaddr_in *me, *peer;
|
|
int s;
|
|
|
|
s = ID0socket(AF_INET, SOCK_DGRAM, 0);
|
|
if (s < 0) {
|
|
LogPrintf(LogERROR, "IpcpCleanInterface: socket: %s\n", strerror(errno));
|
|
return;
|
|
}
|
|
|
|
if (Enabled(ipcp->fsm.bundle, OPT_PROXY))
|
|
cifproxyarp(ipcp->fsm.bundle, ipcp->peer_ifip, s);
|
|
|
|
if (ipcp->my_ifip.s_addr != INADDR_ANY ||
|
|
ipcp->peer_ifip.s_addr != INADDR_ANY) {
|
|
memset(&ifra, '\0', sizeof ifra);
|
|
strncpy(ifra.ifra_name, ipcp->fsm.bundle->ifname,
|
|
sizeof ifra.ifra_name - 1);
|
|
ifra.ifra_name[sizeof ifra.ifra_name - 1] = '\0';
|
|
me = (struct sockaddr_in *)&ifra.ifra_addr;
|
|
peer = (struct sockaddr_in *)&ifra.ifra_broadaddr;
|
|
me->sin_family = peer->sin_family = AF_INET;
|
|
me->sin_len = peer->sin_len = sizeof(struct sockaddr_in);
|
|
me->sin_addr = ipcp->my_ifip;
|
|
peer->sin_addr = ipcp->peer_ifip;
|
|
if (ID0ioctl(s, SIOCDIFADDR, &ifra) < 0) {
|
|
LogPrintf(LogERROR, "IpcpCleanInterface: ioctl(SIOCDIFADDR): %s\n",
|
|
strerror(errno));
|
|
close(s);
|
|
}
|
|
ipcp->my_ifip.s_addr = ipcp->peer_ifip.s_addr = INADDR_ANY;
|
|
}
|
|
|
|
close(s);
|
|
}
|
|
|
|
static void
|
|
IpcpLayerDown(struct fsm *fp)
|
|
{
|
|
/* About to come down */
|
|
struct ipcp *ipcp = fsm2ipcp(fp);
|
|
const char *s;
|
|
|
|
s = inet_ntoa(ipcp->peer_ifip);
|
|
LogPrintf(LogIsKept(LogLINK) ? LogLINK : LogIPCP, "IpcpLayerDown: %s\n", s);
|
|
|
|
throughput_stop(&ipcp->throughput);
|
|
throughput_log(&ipcp->throughput, LogIPCP, NULL);
|
|
/*
|
|
* XXX this stuff should really live in the FSM. Our config should
|
|
* associate executable sections in files with events.
|
|
*/
|
|
if (SelectSystem(fp->bundle, s, LINKDOWNFILE, NULL) < 0)
|
|
if (bundle_GetLabel(fp->bundle)) {
|
|
if (SelectSystem(fp->bundle, bundle_GetLabel(fp->bundle),
|
|
LINKDOWNFILE, NULL) < 0)
|
|
SelectSystem(fp->bundle, "MYADDR", LINKDOWNFILE, NULL);
|
|
} else
|
|
SelectSystem(fp->bundle, "MYADDR", LINKDOWNFILE, NULL);
|
|
|
|
if (!(ipcp->fsm.bundle->phys_type & PHYS_DEMAND))
|
|
IpcpCleanInterface(ipcp);
|
|
}
|
|
|
|
static void
|
|
IpcpLayerUp(struct fsm *fp)
|
|
{
|
|
/* We're now up */
|
|
struct ipcp *ipcp = fsm2ipcp(fp);
|
|
char tbuff[100];
|
|
|
|
LogPrintf(LogIPCP, "IpcpLayerUp.\n");
|
|
snprintf(tbuff, sizeof tbuff, "myaddr = %s ", inet_ntoa(ipcp->my_ip));
|
|
LogPrintf(LogIsKept(LogIPCP) ? LogIPCP : LogLINK, " %s hisaddr = %s\n",
|
|
tbuff, inet_ntoa(ipcp->peer_ip));
|
|
|
|
if (ipcp->peer_compproto >> 16 == PROTO_VJCOMP)
|
|
sl_compress_init(&ipcp->vj.cslc, (ipcp->peer_compproto >> 8) & 255);
|
|
|
|
if (ipcp_SetIPaddress(fp->bundle, ipcp->my_ip, ipcp->peer_ip, 0) < 0) {
|
|
LogPrintf(LogERROR, "IpcpLayerUp: unable to set ip address\n");
|
|
return;
|
|
}
|
|
|
|
#ifndef NOALIAS
|
|
if (AliasEnabled())
|
|
(*PacketAlias.SetAddress)(ipcp->my_ip);
|
|
#endif
|
|
|
|
/*
|
|
* XXX this stuff should really live in the FSM. Our config should
|
|
* associate executable sections in files with events.
|
|
*/
|
|
if (SelectSystem(fp->bundle, inet_ntoa(ipcp->my_ifip), LINKUPFILE, NULL) < 0)
|
|
if (bundle_GetLabel(fp->bundle)) {
|
|
if (SelectSystem(fp->bundle, bundle_GetLabel(fp->bundle),
|
|
LINKUPFILE, NULL) < 0)
|
|
SelectSystem(fp->bundle, "MYADDR", LINKUPFILE, NULL);
|
|
} else
|
|
SelectSystem(fp->bundle, "MYADDR", LINKUPFILE, NULL);
|
|
|
|
throughput_start(&ipcp->throughput, "IPCP throughput",
|
|
Enabled(fp->bundle, OPT_THROUGHPUT));
|
|
bundle_DisplayPrompt(fp->bundle);
|
|
}
|
|
|
|
static int
|
|
AcceptableAddr(struct in_range *prange, struct in_addr ipaddr)
|
|
{
|
|
/* Is the given IP in the given range ? */
|
|
LogPrintf(LogDEBUG, "requested = %x\n", (unsigned)htonl(ipaddr.s_addr));
|
|
LogPrintf(LogDEBUG, "range = %x\n", (unsigned)htonl(prange->ipaddr.s_addr));
|
|
LogPrintf(LogDEBUG, "/%x\n", (unsigned)htonl(prange->mask.s_addr));
|
|
LogPrintf(LogDEBUG, "%x, %x\n",
|
|
(unsigned)htonl(prange->ipaddr.s_addr & prange->mask.s_addr),
|
|
(unsigned)htonl(ipaddr.s_addr & prange->mask.s_addr));
|
|
return (prange->ipaddr.s_addr & prange->mask.s_addr) ==
|
|
(ipaddr.s_addr & prange->mask.s_addr) && ipaddr.s_addr;
|
|
}
|
|
|
|
static void
|
|
IpcpDecodeConfig(struct fsm *fp, u_char * cp, int plen, int mode_type,
|
|
struct fsm_decode *dec)
|
|
{
|
|
/* Deal with incoming PROTO_IPCP */
|
|
struct ipcp *ipcp = fsm2ipcp(fp);
|
|
int type, length;
|
|
u_int32_t compproto;
|
|
struct compreq *pcomp;
|
|
struct in_addr ipaddr, dstipaddr, have_ip, dns[2], dnsnak[2];
|
|
char tbuff[100], tbuff2[100];
|
|
int gotdns, gotdnsnak;
|
|
|
|
gotdns = 0;
|
|
gotdnsnak = 0;
|
|
dnsnak[0].s_addr = dnsnak[1].s_addr = INADDR_ANY;
|
|
|
|
while (plen >= sizeof(struct fsmconfig)) {
|
|
type = *cp;
|
|
length = cp[1];
|
|
if (type < NCFTYPES)
|
|
snprintf(tbuff, sizeof tbuff, " %s[%d] ", cftypes[type], length);
|
|
else if (type > 128 && type < 128 + NCFTYPES128)
|
|
snprintf(tbuff, sizeof tbuff, " %s[%d] ", cftypes128[type-128], length);
|
|
else
|
|
snprintf(tbuff, sizeof tbuff, " <%d>[%d] ", type, length);
|
|
|
|
switch (type) {
|
|
case TY_IPADDR: /* RFC1332 */
|
|
ipaddr.s_addr = *(u_int32_t *)(cp + 2);
|
|
LogPrintf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr));
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (iplist_isvalid(&ipcp->cfg.peer_list)) {
|
|
if (ipaddr.s_addr == INADDR_ANY ||
|
|
iplist_ip2pos(&ipcp->cfg.peer_list, ipaddr) < 0 ||
|
|
ipcp_SetIPaddress(fp->bundle, ipcp->cfg.my_range.ipaddr,
|
|
ipaddr, 1)) {
|
|
LogPrintf(LogIPCP, "%s: Address invalid or already in use\n",
|
|
inet_ntoa(ipaddr));
|
|
if (iplist_ip2pos(&ipcp->cfg.peer_list, ipcp->peer_ifip) >= 0)
|
|
/*
|
|
* If we've already got a valid address configured for the peer
|
|
* (in DEMAND mode), try NAKing with that so that we don't
|
|
* have to upset things too much.
|
|
*/
|
|
ipcp->peer_ip = ipcp->peer_ifip;
|
|
else
|
|
/* Just pick an IP number from our list */
|
|
ipcp->peer_ip = ChooseHisAddr
|
|
(fp->bundle, ipcp->cfg.my_range.ipaddr);
|
|
|
|
if (ipcp->peer_ip.s_addr == INADDR_ANY) {
|
|
memcpy(dec->rejend, cp, length);
|
|
dec->rejend += length;
|
|
} else {
|
|
memcpy(dec->nakend, cp, 2);
|
|
memcpy(dec->nakend+2, &ipcp->peer_ip.s_addr, length - 2);
|
|
dec->nakend += length;
|
|
}
|
|
break;
|
|
}
|
|
} else if (!AcceptableAddr(&ipcp->cfg.peer_range, ipaddr)) {
|
|
/*
|
|
* If destination address is not acceptable, NAK with what we
|
|
* want to use.
|
|
*/
|
|
memcpy(dec->nakend, cp, 2);
|
|
if ((ipcp->peer_ifip.s_addr & ipcp->cfg.peer_range.mask.s_addr) ==
|
|
(ipcp->cfg.peer_range.ipaddr.s_addr &
|
|
ipcp->cfg.peer_range.mask.s_addr))
|
|
/* We prefer the already-configured address */
|
|
memcpy(dec->nakend+2, &ipcp->peer_ifip.s_addr, length - 2);
|
|
else
|
|
memcpy(dec->nakend+2, &ipcp->peer_ip.s_addr, length - 2);
|
|
dec->nakend += length;
|
|
break;
|
|
}
|
|
ipcp->peer_ip = ipaddr;
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
break;
|
|
case MODE_NAK:
|
|
if (AcceptableAddr(&ipcp->cfg.my_range, ipaddr)) {
|
|
/* Use address suggested by peer */
|
|
snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s ", tbuff,
|
|
inet_ntoa(ipcp->my_ip));
|
|
LogPrintf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr));
|
|
ipcp->my_ip = ipaddr;
|
|
} else {
|
|
LogPrintf(LogIsKept(LogIPCP) ? LogIPCP : LogPHASE,
|
|
"%s: Unacceptable address!\n", inet_ntoa(ipaddr));
|
|
FsmClose(&ipcp->fsm);
|
|
}
|
|
break;
|
|
case MODE_REJ:
|
|
ipcp->peer_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
case TY_COMPPROTO:
|
|
compproto = htonl(*(u_int32_t *)(cp + 2));
|
|
LogPrintf(LogIPCP, "%s %s\n", tbuff, vj2asc(compproto));
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (!IsAccepted(ipcp->cfg.vj.neg)) {
|
|
memcpy(dec->rejend, cp, length);
|
|
dec->rejend += length;
|
|
} else {
|
|
pcomp = (struct compreq *) (cp + 2);
|
|
switch (length) {
|
|
case 4: /* RFC1172 */
|
|
if (ntohs(pcomp->proto) == PROTO_VJCOMP) {
|
|
LogPrintf(LogWARN, "Peer is speaking RFC1172 compression protocol !\n");
|
|
ipcp->heis1172 = 1;
|
|
ipcp->peer_compproto = compproto;
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
} else {
|
|
memcpy(dec->nakend, cp, 2);
|
|
pcomp->proto = htons(PROTO_VJCOMP);
|
|
memcpy(dec->nakend+2, &pcomp, 2);
|
|
dec->nakend += length;
|
|
}
|
|
break;
|
|
case 6: /* RFC1332 */
|
|
if (ntohs(pcomp->proto) == PROTO_VJCOMP
|
|
&& pcomp->slots <= MAX_VJ_STATES
|
|
&& pcomp->slots >= MIN_VJ_STATES) {
|
|
ipcp->peer_compproto = compproto;
|
|
ipcp->heis1172 = 0;
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
} else {
|
|
memcpy(dec->nakend, cp, 2);
|
|
pcomp->proto = htons(PROTO_VJCOMP);
|
|
pcomp->slots = DEF_VJ_STATES;
|
|
pcomp->compcid = 0;
|
|
memcpy(dec->nakend+2, &pcomp, sizeof pcomp);
|
|
dec->nakend += length;
|
|
}
|
|
break;
|
|
default:
|
|
memcpy(dec->rejend, cp, length);
|
|
dec->rejend += length;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
LogPrintf(LogIPCP, "%s changing compproto: %08x --> %08x\n",
|
|
tbuff, ipcp->my_compproto, compproto);
|
|
ipcp->my_compproto = compproto;
|
|
break;
|
|
case MODE_REJ:
|
|
ipcp->peer_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
case TY_IPADDRS: /* RFC1172 */
|
|
ipaddr.s_addr = *(u_int32_t *)(cp + 2);
|
|
dstipaddr.s_addr = *(u_int32_t *)(cp + 6);
|
|
snprintf(tbuff2, sizeof tbuff2, "%s %s,", tbuff, inet_ntoa(ipaddr));
|
|
LogPrintf(LogIPCP, "%s %s\n", tbuff2, inet_ntoa(dstipaddr));
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
ipcp->peer_ip = ipaddr;
|
|
ipcp->my_ip = dstipaddr;
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
break;
|
|
case MODE_NAK:
|
|
snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s", tbuff,
|
|
inet_ntoa(ipcp->my_ip));
|
|
LogPrintf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr));
|
|
ipcp->my_ip = ipaddr;
|
|
ipcp->peer_ip = dstipaddr;
|
|
break;
|
|
case MODE_REJ:
|
|
ipcp->peer_reject |= (1 << type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_PRIMARY_DNS: /* DNS negotiation (rfc1877) */
|
|
case TY_SECONDARY_DNS:
|
|
ipaddr.s_addr = *(u_int32_t *)(cp + 2);
|
|
LogPrintf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr));
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (!IsAccepted(ipcp->cfg.ns.dns_neg)) {
|
|
ipcp->my_reject |= (1 << (type - TY_ADJUST_NS));
|
|
memcpy(dec->rejend, cp, length);
|
|
dec->rejend += length;
|
|
break;
|
|
}
|
|
if (!gotdns) {
|
|
dns[0] = ipcp->cfg.ns.dns[0];
|
|
dns[1] = ipcp->cfg.ns.dns[1];
|
|
if (dns[0].s_addr == INADDR_ANY && dns[1].s_addr == INADDR_ANY)
|
|
getdns(ipcp, dns);
|
|
gotdns = 1;
|
|
}
|
|
have_ip = dns[type == TY_PRIMARY_DNS ? 0 : 1];
|
|
|
|
if (ipaddr.s_addr != have_ip.s_addr) {
|
|
/*
|
|
* The client has got the DNS stuff wrong (first request) so
|
|
* we'll tell 'em how it is
|
|
*/
|
|
memcpy(dec->nakend, cp, 2); /* copy first two (type/length) */
|
|
memcpy(dec->nakend + 2, &have_ip.s_addr, length - 2);
|
|
dec->nakend += length;
|
|
} else {
|
|
/*
|
|
* Otherwise they have it right (this time) so we send a ack packet
|
|
* back confirming it... end of story
|
|
*/
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
}
|
|
break;
|
|
case MODE_NAK: /* what does this mean?? */
|
|
if (IsEnabled(ipcp->cfg.ns.dns_neg)) {
|
|
gotdnsnak = 1;
|
|
dnsnak[type == TY_PRIMARY_DNS ? 0 : 1].s_addr =
|
|
*(u_int32_t *)(cp + 2);
|
|
}
|
|
break;
|
|
case MODE_REJ: /* Can't do much, stop asking */
|
|
ipcp->peer_reject |= (1 << (type - TY_ADJUST_NS));
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case TY_PRIMARY_NBNS: /* M$ NetBIOS nameserver hack (rfc1877) */
|
|
case TY_SECONDARY_NBNS:
|
|
ipaddr.s_addr = *(u_int32_t *)(cp + 2);
|
|
LogPrintf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr));
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
have_ip.s_addr =
|
|
ipcp->cfg.ns.nbns[type == TY_PRIMARY_NBNS ? 0 : 1].s_addr;
|
|
|
|
if (have_ip.s_addr == INADDR_ANY) {
|
|
LogPrintf(LogIPCP, "NBNS REQ - rejected - nbns not set\n");
|
|
ipcp->my_reject |= (1 << (type - TY_ADJUST_NS));
|
|
memcpy(dec->rejend, cp, length);
|
|
dec->rejend += length;
|
|
break;
|
|
}
|
|
|
|
if (ipaddr.s_addr != have_ip.s_addr) {
|
|
memcpy(dec->nakend, cp, 2);
|
|
memcpy(dec->nakend+2, &have_ip.s_addr, length);
|
|
dec->nakend += length;
|
|
} else {
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
LogPrintf(LogIPCP, "MS NBNS req %d - NAK??\n", type);
|
|
break;
|
|
case MODE_REJ:
|
|
LogPrintf(LogIPCP, "MS NBNS req %d - REJ??\n", type);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (mode_type != MODE_NOP) {
|
|
ipcp->my_reject |= (1 << type);
|
|
memcpy(dec->rejend, cp, length);
|
|
dec->rejend += length;
|
|
}
|
|
break;
|
|
}
|
|
plen -= length;
|
|
cp += length;
|
|
}
|
|
|
|
if (gotdnsnak)
|
|
if (!setdns(ipcp, dnsnak)) {
|
|
ipcp->peer_reject |= (1 << (TY_PRIMARY_DNS - TY_ADJUST_NS));
|
|
ipcp->peer_reject |= (1 << (TY_SECONDARY_DNS - TY_ADJUST_NS));
|
|
}
|
|
|
|
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
|
|
IpcpInput(struct ipcp *ipcp, struct mbuf * bp)
|
|
{
|
|
/* Got PROTO_IPCP from link */
|
|
FsmInput(&ipcp->fsm, bp);
|
|
}
|
|
|
|
int
|
|
UseHisaddr(struct bundle *bundle, const char *hisaddr, int setaddr)
|
|
{
|
|
struct ipcp *ipcp = &bundle->ncp.ipcp;
|
|
|
|
/* Use `hisaddr' for the peers address (set iface if `setaddr') */
|
|
memset(&ipcp->cfg.peer_range, '\0', sizeof ipcp->cfg.peer_range);
|
|
iplist_reset(&ipcp->cfg.peer_list);
|
|
if (strpbrk(hisaddr, ",-")) {
|
|
iplist_setsrc(&ipcp->cfg.peer_list, hisaddr);
|
|
if (iplist_isvalid(&ipcp->cfg.peer_list)) {
|
|
iplist_setrandpos(&ipcp->cfg.peer_list);
|
|
ipcp->peer_ip = ChooseHisAddr(bundle, ipcp->my_ip);
|
|
if (ipcp->peer_ip.s_addr == INADDR_ANY) {
|
|
LogPrintf(LogWARN, "%s: None available !\n",
|
|
ipcp->cfg.peer_list.src);
|
|
return(0);
|
|
}
|
|
ipcp->cfg.peer_range.ipaddr.s_addr = ipcp->peer_ip.s_addr;
|
|
ipcp->cfg.peer_range.mask.s_addr = INADDR_BROADCAST;
|
|
ipcp->cfg.peer_range.width = 32;
|
|
} else {
|
|
LogPrintf(LogWARN, "%s: Invalid range !\n", hisaddr);
|
|
return 0;
|
|
}
|
|
} else if (ParseAddr(ipcp, 1, &hisaddr, &ipcp->cfg.peer_range.ipaddr,
|
|
&ipcp->cfg.peer_range.mask,
|
|
&ipcp->cfg.peer_range.width) != 0) {
|
|
ipcp->peer_ip.s_addr = ipcp->cfg.peer_range.ipaddr.s_addr;
|
|
|
|
if (setaddr && ipcp_SetIPaddress(bundle, ipcp->cfg.my_range.ipaddr,
|
|
ipcp->cfg.peer_range.ipaddr, 0) < 0) {
|
|
ipcp->cfg.my_range.ipaddr.s_addr = INADDR_ANY;
|
|
ipcp->cfg.peer_range.ipaddr.s_addr = INADDR_ANY;
|
|
return 0;
|
|
}
|
|
} else
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|