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/*
* $Id: dhcp.c,v 1.1 1999/07/19 10:06:17 jkh Exp $
*
* Copyright (c) 1999
* C. Stone. 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,
* verbatim and that no modifications are made prior to this
* point in the file.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY C. STONE ``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 C STONE OR HIS BODILY PARASITES 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, LIFE 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 BY THE VOICES IN YOUR HEAD BEFOREHAND.
*
*/
#include "sysinstall.h"
#include <ctype.h>
int
dhcpParseLeases(char *file, char *hostname, char *domain, char *nameserver,
char *ipaddr, char *gateway, char *netmask)
{
char tempbuf[1024];
char optbuf[1024], *optname = NULL;
char *tptr;
int endedflag = 0;
int leaseflag = 0;
FILE *fp;
enum { P_NOSTMT, P_NOSTMT1, P_STMT, P_STMTLINE } state;
if ((fp = fopen(file, "r")) == NULL) {
msgDebug("error opening file %s: %s\n", file, strerror(errno));
return -1;
}
state = P_NOSTMT;
while (fscanf(fp, "%1023s", tempbuf) > 0) {
switch (state) {
case P_NOSTMT:
state = P_NOSTMT1;
if (!strncasecmp(tempbuf, "lease", 5)) {
if (!leaseflag)
leaseflag = 1;
else {
fclose(fp);
return 0;
}
}
break;
case P_NOSTMT1:
if (tempbuf[0] != '{') {
msgWarn("dhcpParseLeases: '{' expected");
fclose(fp);
return -1;
}
state = P_STMT;
break;
case P_STMT:
if (!strncasecmp("option", tempbuf, 6))
continue;
if (tempbuf[0] == '}') {
state = P_NOSTMT;
leaseflag = 0;
continue;
}
if (!leaseflag)
break;
if (tempbuf[0] == ';') { /* play it safe */
state = P_STMT;
continue;
}
if ((tptr = (char *)strchr(tempbuf, ';')) && (*(tptr + 1) == 0)) {
*tptr = NULL;
endedflag = 1;
}
if (!isalnum(tempbuf[0])) {
msgWarn("dhcpParseLeases: bad option");
fclose(fp);
return -1;
}
if (optname)
free(optname);
optname = strdup(tempbuf);
if (endedflag) {
state = P_STMT;
endedflag = 0;
continue;
}
state = P_STMTLINE;
break;
case P_STMTLINE:
if (tempbuf[0] == ';') {
state = P_STMT;
continue;
}
if ((tptr = (char *)strchr(tempbuf, ';')) && (*(tptr + 1) == 0)) {
*tptr = NULL;
endedflag = 1;
}
if (tempbuf[0] == '"') {
if (sscanf(tempbuf, "\"%[^\" ]\"", optbuf) < 1) {
msgWarn("dhcpParseLeases: bad option value");
fclose(fp);
return -1;
}
}
else
strcpy(optbuf, tempbuf);
if (!strcasecmp("host-name", optname)) {
strcpy(hostname, optbuf);
} else if (!strcasecmp("domain-name", optname)) {
strcpy(domain, optbuf);
} else if (!strcasecmp("fixed-address", optname)) {
strcpy(ipaddr, optbuf);
} else if (!strcasecmp("routers", optname)) {
strcpy(gateway, optbuf);
} else if (!strcasecmp("subnet-mask", optname)) {
strcpy(netmask, optbuf);
} else if (!strcasecmp("domain-name-servers", optname)) {
/* <jkh> ...one value per property */
if((tptr = (char *)strchr(optbuf, ',')))
*tptr = NULL;
strcpy(nameserver, optbuf);
}
if (endedflag) {
state = P_STMT;
endedflag = 0;
continue;
}
break;
}
}
fclose(fp);
return 0;
}
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