diff options
Diffstat (limited to 'usr.sbin/sysinstall/dhcp.c')
-rw-r--r-- | usr.sbin/sysinstall/dhcp.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/usr.sbin/sysinstall/dhcp.c b/usr.sbin/sysinstall/dhcp.c new file mode 100644 index 0000000..0cbdaa8 --- /dev/null +++ b/usr.sbin/sysinstall/dhcp.c @@ -0,0 +1,156 @@ +/* + * $Id$ + * + * 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("server-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; +} |