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readfile.c
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/************************************************************************
Copyright 1988, 1991 by Carnegie Mellon University
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, provided
that the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation, and that the name of Carnegie Mellon University not be used
in advertising or publicity pertaining to distribution of the software
without specific, written prior permission.
CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
IN NO EVENT SHALL CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
************************************************************************/
/*
* bootpd configuration file reading code.
*
* The routines in this file deal with reading, interpreting, and storing
* the information found in the bootpd configuration file (usually
* /etc/bootptab).
*/
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <time.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <syslog.h>
#ifndef USE_BFUNCS
#include <memory.h>
/* Yes, memcpy is OK here (no overlapped copies). */
#define bcopy(a,b,c) memcpy(b,a,c)
#define bzero(p,l) memset(p,0,l)
#define bcmp(a,b,c) memcmp(a,b,c)
#endif
#include "bootp.h"
#include "hash.h"
#include "hwaddr.h"
#include "lookup.h"
#include "readfile.h"
#include "report.h"
#include "tzone.h"
#include "bootpd.h"
#define HASHTABLESIZE 257 /* Hash table size (prime) */
/* Non-standard hardware address type (see bootp.h) */
#define HTYPE_DIRECT 0
/* Error codes returned by eval_symbol: */
#define SUCCESS 0
#define E_END_OF_ENTRY (-1)
#define E_SYNTAX_ERROR (-2)
#define E_UNKNOWN_SYMBOL (-3)
#define E_BAD_IPADDR (-4)
#define E_BAD_HWADDR (-5)
#define E_BAD_LONGWORD (-6)
#define E_BAD_HWATYPE (-7)
#define E_BAD_PATHNAME (-8)
#define E_BAD_VALUE (-9)
/* Tag idendities. */
#define SYM_NULL 0
#define SYM_BOOTFILE 1
#define SYM_COOKIE_SERVER 2
#define SYM_DOMAIN_SERVER 3
#define SYM_GATEWAY 4
#define SYM_HWADDR 5
#define SYM_HOMEDIR 6
#define SYM_HTYPE 7
#define SYM_IMPRESS_SERVER 8
#define SYM_IPADDR 9
#define SYM_LOG_SERVER 10
#define SYM_LPR_SERVER 11
#define SYM_NAME_SERVER 12
#define SYM_RLP_SERVER 13
#define SYM_SUBNET_MASK 14
#define SYM_TIME_OFFSET 15
#define SYM_TIME_SERVER 16
#define SYM_VENDOR_MAGIC 17
#define SYM_SIMILAR_ENTRY 18
#define SYM_NAME_SWITCH 19
#define SYM_BOOTSIZE 20
#define SYM_BOOT_SERVER 22
#define SYM_TFTPDIR 23
#define SYM_DUMP_FILE 24
#define SYM_DOMAIN_NAME 25
#define SYM_SWAP_SERVER 26
#define SYM_ROOT_PATH 27
#define SYM_EXTEN_FILE 28
#define SYM_REPLY_ADDR 29
#define SYM_NIS_DOMAIN 30 /* RFC 1533 */
#define SYM_NIS_SERVER 31 /* RFC 1533 */
#define SYM_NTP_SERVER 32 /* RFC 1533 */
#define SYM_EXEC_FILE 33 /* YORK_EX_OPTION */
#define SYM_MSG_SIZE 34
#define SYM_MIN_WAIT 35
#ifdef DHCP
#define SYM_DHCP_LEASE 36 /* RFC 1533 PeP hic facet */
#define SYM_DHCP_IPRENEW 37
#define SYM_DHCP_IPREBIND 38
#endif
/* XXX - Add new tags here */
#define OP_ADDITION 1 /* Operations on tags */
#define OP_DELETION 2
#define OP_BOOLEAN 3
#define MAXINADDRS 16 /* Max size of an IP address list */
#define MAXBUFLEN 256 /* Max temp buffer space */
#define MAXENTRYLEN 2048 /* Max size of an entire entry */
/*
* Structure used to map a configuration-file symbol (such as "ds") to a
* unique integer.
*/
struct symbolmap {
char *symbol;
int symbolcode;
};
struct htypename {
char *name;
byte htype;
};
PRIVATE int nhosts; /* Number of hosts (/w hw or IP address) */
PRIVATE int nentries; /* Total number of entries */
PRIVATE int32_t modtime = 0; /* Last modification time of bootptab */
PRIVATE char *current_hostname; /* Name of the current entry. */
PRIVATE char current_tagname[8];
/*
* List of symbolic names used in the bootptab file. The order and actual
* values of the symbol codes (SYM_. . .) are unimportant, but they must
* all be unique.
*/
PRIVATE struct symbolmap symbol_list[] = {
{"bf", SYM_BOOTFILE},
{"bs", SYM_BOOTSIZE},
{"cs", SYM_COOKIE_SERVER},
{"df", SYM_DUMP_FILE},
{"dn", SYM_DOMAIN_NAME},
{"ds", SYM_DOMAIN_SERVER},
#ifdef DHCP
{"dl", SYM_DHCP_LEASE}, /* PeP hic facet */
#endif
{"ef", SYM_EXTEN_FILE},
{"ex", SYM_EXEC_FILE}, /* YORK_EX_OPTION */
{"gw", SYM_GATEWAY},
{"ha", SYM_HWADDR},
{"hd", SYM_HOMEDIR},
{"hn", SYM_NAME_SWITCH},
{"ht", SYM_HTYPE},
{"im", SYM_IMPRESS_SERVER},
{"ip", SYM_IPADDR},
{"lg", SYM_LOG_SERVER},
{"lp", SYM_LPR_SERVER},
{"ms", SYM_MSG_SIZE},
{"mw", SYM_MIN_WAIT},
{"ns", SYM_NAME_SERVER},
{"nt", SYM_NTP_SERVER},
{"ra", SYM_REPLY_ADDR},
{"rl", SYM_RLP_SERVER},
{"rp", SYM_ROOT_PATH},
{"sa", SYM_BOOT_SERVER},
{"sm", SYM_SUBNET_MASK},
{"sw", SYM_SWAP_SERVER},
{"tc", SYM_SIMILAR_ENTRY},
{"td", SYM_TFTPDIR},
{"to", SYM_TIME_OFFSET},
{"ts", SYM_TIME_SERVER},
{"vm", SYM_VENDOR_MAGIC},
{"yd", SYM_NIS_DOMAIN},
{"ys", SYM_NIS_SERVER},
/* XXX - Add new tags here */
};
/*
* List of symbolic names for hardware types. Name translates into
* hardware type code listed with it. Names must begin with a letter
* and must be all lowercase. This is searched linearly, so put
* commonly-used entries near the beginning.
*/
PRIVATE struct htypename htnamemap[] = {
{"ethernet", HTYPE_ETHERNET},
{"ethernet3", HTYPE_EXP_ETHERNET},
{"ether", HTYPE_ETHERNET},
{"ether3", HTYPE_EXP_ETHERNET},
{"ieee802", HTYPE_IEEE802},
{"tr", HTYPE_IEEE802},
{"token-ring", HTYPE_IEEE802},
{"pronet", HTYPE_PRONET},
{"chaos", HTYPE_CHAOS},
{"arcnet", HTYPE_ARCNET},
{"ax.25", HTYPE_AX25},
{"direct", HTYPE_DIRECT},
{"serial", HTYPE_DIRECT},
{"slip", HTYPE_DIRECT},
{"ppp", HTYPE_DIRECT}
};
/*
* Externals and forward declarations.
*/
#ifdef __STDC__
#define P(args) args
#else
#define P(args) ()
#endif
extern boolean iplookcmp();
boolean nmcmp P((hash_datum *, hash_datum *));
PRIVATE void
adjust P((char **));
PRIVATE void
del_string P((struct shared_string *));
PRIVATE void
del_bindata P((struct shared_bindata *));
PRIVATE void
del_iplist P((struct in_addr_list *));
PRIVATE void
eat_whitespace P((char **));
PRIVATE int
eval_symbol P((char **, struct host *));
PRIVATE void
fill_defaults P((struct host *, char **));
PRIVATE void
free_host P((hash_datum *));
PRIVATE struct in_addr_list *
get_addresses P((char **));
PRIVATE struct shared_string *
get_shared_string P((char **));
PRIVATE char *
get_string P((char **, char *, u_int *));
PRIVATE u_int32_t
get_u_long P((char **));
PRIVATE boolean
goodname P((char *));
PRIVATE boolean
hwinscmp P((hash_datum *, hash_datum *));
PRIVATE int
interp_byte P((char **, byte *));
PRIVATE void
makelower P((char *));
PRIVATE boolean
nullcmp P((hash_datum *, hash_datum *));
PRIVATE int
process_entry P((struct host *, char *));
PRIVATE int
process_generic P((char **, struct shared_bindata **, u_int));
PRIVATE byte *
prs_haddr P((char **, u_int));
PRIVATE int
prs_inetaddr P((char **, u_int32_t *));
PRIVATE void
read_entry P((FILE *, char *, u_int *));
PRIVATE char *
smalloc P((u_int));
#undef P
/*
* Vendor magic cookies for CMU and RFC1048
*/
u_char vm_cmu[4] = VM_CMU;
u_char vm_rfc1048[4] = VM_RFC1048;
/*
* Main hash tables
*/
hash_tbl *hwhashtable;
hash_tbl *iphashtable;
hash_tbl *nmhashtable;
/*
* Allocate hash tables for hardware address, ip address, and hostname
* (shared by bootpd and bootpef)
*/
void
rdtab_init()
{
hwhashtable = hash_Init(HASHTABLESIZE);
iphashtable = hash_Init(HASHTABLESIZE);
nmhashtable = hash_Init(HASHTABLESIZE);
if (!(hwhashtable && iphashtable && nmhashtable)) {
report(LOG_ERR, "Unable to allocate hash tables.");
exit(1);
}
}
/*
* Read bootptab database file. Avoid rereading the file if the
* write date hasn't changed since the last time we read it.
*/
void
readtab(force)
int force;
{
struct host *hp;
FILE *fp;
struct stat st;
unsigned hashcode, buflen;
static char buffer[MAXENTRYLEN];
/*
* Check the last modification time.
*/
if (stat(bootptab, &st) < 0) {
report(LOG_ERR, "stat on \"%s\": %s",
bootptab, get_errmsg());
return;
}
#ifdef DEBUG
if (debug > 3) {
char timestr[28];
strcpy(timestr, ctime(&(st.st_mtime)));
/* zap the newline */
timestr[24] = '\0';
report(LOG_INFO, "bootptab mtime: %s",
timestr);
}
#endif
if ((force == 0) &&
(st.st_mtime == modtime) &&
st.st_nlink) {
/*
* hasn't been modified or deleted yet.
*/
return;
}
if (debug)
report(LOG_INFO, "reading %s\"%s\"",
(modtime != 0L) ? "new " : "",
bootptab);
/*
* Open bootptab file.
*/
if ((fp = fopen(bootptab, "r")) == NULL) {
report(LOG_ERR, "error opening \"%s\": %s", bootptab, get_errmsg());
return;
}
/*
* Record file modification time.
*/
if (fstat(fileno(fp), &st) < 0) {
report(LOG_ERR, "fstat: %s", get_errmsg());
fclose(fp);
return;
}
modtime = st.st_mtime;
/*
* Entirely erase all hash tables.
*/
hash_Reset(hwhashtable, free_host);
hash_Reset(iphashtable, free_host);
hash_Reset(nmhashtable, free_host);
nhosts = 0;
nentries = 0;
while (TRUE) {
buflen = sizeof(buffer);
read_entry(fp, buffer, &buflen);
if (buflen == 0) { /* More entries? */
break;
}
hp = (struct host *) smalloc(sizeof(struct host));
bzero((char *) hp, sizeof(*hp));
/* the link count it zero */
/*
* Get individual info
*/
if (process_entry(hp, buffer) < 0) {
hp->linkcount = 1;
free_host((hash_datum *) hp);
continue;
}
/*
* If this is not a dummy entry, and the IP or HW
* address is not yet set, try to get them here.
* Dummy entries have . as first char of name.
*/
if (goodname(hp->hostname->string)) {
char *hn = hp->hostname->string;
u_int32_t value;
if (hp->flags.iaddr == 0) {
if (lookup_ipa(hn, &value)) {
report(LOG_ERR, "can not get IP addr for %s", hn);
report(LOG_ERR, "(dummy names should start with '.')");
} else {
hp->iaddr.s_addr = value;
hp->flags.iaddr = TRUE;
}
}
/* Set default subnet mask. */
if (hp->flags.subnet_mask == 0) {
if (lookup_netmask(hp->iaddr.s_addr, &value)) {
report(LOG_ERR, "can not get netmask for %s", hn);
} else {
hp->subnet_mask.s_addr = value;
hp->flags.subnet_mask = TRUE;
}
}
}
if (hp->flags.iaddr) {
nhosts++;
}
/* Register by HW addr if known. */
if (hp->flags.htype && hp->flags.haddr) {
/* We will either insert it or free it. */
hp->linkcount++;
hashcode = hash_HashFunction(hp->haddr, haddrlength(hp->htype));
if (hash_Insert(hwhashtable, hashcode, hwinscmp, hp, hp) < 0) {
report(LOG_NOTICE, "duplicate %s address: %s",
netname(hp->htype),
haddrtoa(hp->haddr, haddrlength(hp->htype)));
free_host((hash_datum *) hp);
continue;
}
}
/* Register by IP addr if known. */
if (hp->flags.iaddr) {
hashcode = hash_HashFunction((u_char *) & (hp->iaddr.s_addr), 4);
if (hash_Insert(iphashtable, hashcode, nullcmp, hp, hp) < 0) {
report(LOG_ERR,
"hash_Insert() failed on IP address insertion");
} else {
/* Just inserted the host struct in a new hash list. */
hp->linkcount++;
}
}
/* Register by Name (always known) */
hashcode = hash_HashFunction((u_char *) hp->hostname->string,
strlen(hp->hostname->string));
if (hash_Insert(nmhashtable, hashcode, nullcmp,
hp->hostname->string, hp) < 0) {
report(LOG_ERR,
"hash_Insert() failed on insertion of hostname: \"%s\"",
hp->hostname->string);
} else {
/* Just inserted the host struct in a new hash list. */
hp->linkcount++;
}
nentries++;
}
fclose(fp);
if (debug)
report(LOG_INFO, "read %d entries (%d hosts) from \"%s\"",
nentries, nhosts, bootptab);
return;
}
/*
* Read an entire host entry from the file pointed to by "fp" and insert it
* into the memory pointed to by "buffer". Leading whitespace and comments
* starting with "#" are ignored (removed). Backslashes (\) always quote
* the next character except that newlines preceeded by a backslash cause
* line-continuation onto the next line. The entry is terminated by a
* newline character which is not preceeded by a backslash. Sequences
* surrounded by double quotes are taken literally (including newlines, but
* not backslashes).
*
* The "bufsiz" parameter points to an unsigned int which specifies the
* maximum permitted buffer size. Upon return, this value will be replaced
* with the actual length of the entry (not including the null terminator).
*
* This code is a little scary. . . . I don't like using gotos in C
* either, but I first wrote this as an FSM diagram and gotos seemed like
* the easiest way to implement it. Maybe later I'll clean it up.
*/
PRIVATE void
read_entry(fp, buffer, bufsiz)
FILE *fp;
char *buffer;
unsigned *bufsiz;
{
int c, length;
length = 0;
/*
* Eat whitespace, blank lines, and comment lines.
*/
top:
c = fgetc(fp);
if (c < 0) {
goto done; /* Exit if end-of-file */
}
if (isspace(c)) {
goto top; /* Skip over whitespace */
}
if (c == '#') {
while (TRUE) { /* Eat comments after # */
c = fgetc(fp);
if (c < 0) {
goto done; /* Exit if end-of-file */
}
if (c == '\n') {
goto top; /* Try to read the next line */
}
}
}
ungetc(c, fp); /* Other character, push it back to reprocess it */
/*
* Now we're actually reading a data entry. Get each character and
* assemble it into the data buffer, processing special characters like
* double quotes (") and backslashes (\).
*/
mainloop:
c = fgetc(fp);
switch (c) {
case EOF:
case '\n':
goto done; /* Exit on EOF or newline */
case '\\':
c = fgetc(fp); /* Backslash, read a new character */
if (c < 0) {
goto done; /* Exit on EOF */
}
*buffer++ = c; /* Store the literal character */
length++;
if (length < *bufsiz - 1) {
goto mainloop;
} else {
goto done;
}
case '"':
*buffer++ = '"'; /* Store double-quote */
length++;
if (length >= *bufsiz - 1) {
goto done;
}
while (TRUE) { /* Special quote processing loop */
c = fgetc(fp);
switch (c) {
case EOF:
goto done; /* Exit on EOF . . . */
case '"':
*buffer++ = '"';/* Store matching quote */
length++;
if (length < *bufsiz - 1) {
goto mainloop; /* And continue main loop */
} else {
goto done;
}
case '\\':
if ((c = fgetc(fp)) < 0) { /* Backslash */
goto done; /* EOF. . . .*/
} /* else fall through */
default:
*buffer++ = c; /* Other character, store it */
length++;
if (length >= *bufsiz - 1) {
goto done;
}
}
}
case ':':
*buffer++ = c; /* Store colons */
length++;
if (length >= *bufsiz - 1) {
goto done;
}
do { /* But remove whitespace after them */
c = fgetc(fp);
if ((c < 0) || (c == '\n')) {
goto done;
}
} while (isspace(c)); /* Skip whitespace */
if (c == '\\') { /* Backslash quotes next character */
c = fgetc(fp);
if (c < 0) {
goto done;
}
if (c == '\n') {
goto top; /* Backslash-newline continuation */
}
}
/* fall through if "other" character */
default:
*buffer++ = c; /* Store other characters */
length++;
if (length >= *bufsiz - 1) {
goto done;
}
}
goto mainloop; /* Keep going */
done:
*buffer = '\0'; /* Terminate string */
*bufsiz = length; /* Tell the caller its length */
}
/*
* Parse out all the various tags and parameters in the host entry pointed
* to by "src". Stuff all the data into the appropriate fields of the
* host structure pointed to by "host". If there is any problem with the
* entry, an error message is reported via report(), no further processing
* is done, and -1 is returned. Successful calls return 0.
*
* (Some errors probably shouldn't be so completely fatal. . . .)
*/
PRIVATE int
process_entry(host, src)
struct host *host;
char *src;
{
int retval;
char *msg;
if (!host || *src == '\0') {
return -1;
}
host->hostname = get_shared_string(&src);
#if 0
/* Be more liberal for the benefit of dummy tag names. */
if (!goodname(host->hostname->string)) {
report(LOG_ERR, "bad hostname: \"%s\"", host->hostname->string);
del_string(host->hostname);
return -1;
}
#endif
current_hostname = host->hostname->string;
adjust(&src);
while (TRUE) {
retval = eval_symbol(&src, host);
if (retval == SUCCESS) {
adjust(&src);
continue;
}
if (retval == E_END_OF_ENTRY) {
/* The default subnet mask is set in readtab() */
return 0;
}
/* Some kind of error. */
switch (retval) {
case E_SYNTAX_ERROR:
msg = "bad syntax";
break;
case E_UNKNOWN_SYMBOL:
msg = "unknown symbol";
break;
case E_BAD_IPADDR:
msg = "bad INET address";
break;
case E_BAD_HWADDR:
msg = "bad hardware address";
break;
case E_BAD_LONGWORD:
msg = "bad longword value";
break;
case E_BAD_HWATYPE:
msg = "bad HW address type";
break;
case E_BAD_PATHNAME:
msg = "bad pathname (need leading '/')";
case E_BAD_VALUE:
msg = "bad value";
default:
msg = "unkown error";
break;
} /* switch */
report(LOG_ERR, "in entry named \"%s\", symbol \"%s\": %s",
current_hostname, current_tagname, msg);
return -1;
}
}
/*
* Macros for use in the function below:
*/
/* Parse one INET address stored directly in MEMBER. */
#define PARSE_IA1(MEMBER) do \
{ \
if (optype == OP_BOOLEAN) \
return E_SYNTAX_ERROR; \
hp->flags.MEMBER = FALSE; \
if (optype == OP_ADDITION) { \
if (prs_inetaddr(symbol, &value) < 0) \
return E_BAD_IPADDR; \
hp->MEMBER.s_addr = value; \
hp->flags.MEMBER = TRUE; \
} \
} while (0)
/* Parse a list of INET addresses pointed to by MEMBER */
#define PARSE_IAL(MEMBER) do \
{ \
if (optype == OP_BOOLEAN) \
return E_SYNTAX_ERROR; \
if (hp->flags.MEMBER) { \
hp->flags.MEMBER = FALSE; \
assert(hp->MEMBER); \
del_iplist(hp->MEMBER); \
hp->MEMBER = NULL; \
} \
if (optype == OP_ADDITION) { \
hp->MEMBER = get_addresses(symbol); \
if (hp->MEMBER == NULL) \
return E_SYNTAX_ERROR; \
hp->flags.MEMBER = TRUE; \
} \
} while (0)
/* Parse a shared string pointed to by MEMBER */
#define PARSE_STR(MEMBER) do \
{ \
if (optype == OP_BOOLEAN) \
return E_SYNTAX_ERROR; \
if (hp->flags.MEMBER) { \
hp->flags.MEMBER = FALSE; \
assert(hp->MEMBER); \
del_string(hp->MEMBER); \
hp->MEMBER = NULL; \
} \
if (optype == OP_ADDITION) { \
hp->MEMBER = get_shared_string(symbol); \
if (hp->MEMBER == NULL) \
return E_SYNTAX_ERROR; \
hp->flags.MEMBER = TRUE; \
} \
} while (0)
/* Parse an unsigned integer value for MEMBER */
#define PARSE_UINT(MEMBER) do \
{ \
if (optype == OP_BOOLEAN) \
return E_SYNTAX_ERROR; \
hp->flags.MEMBER = FALSE; \
if (optype == OP_ADDITION) { \
value = get_u_long(symbol); \
hp->MEMBER = value; \
hp->flags.MEMBER = TRUE; \
} \
} while (0)
/*
* Evaluate the two-character tag symbol pointed to by "symbol" and place
* the data in the structure pointed to by "hp". The pointer pointed to
* by "symbol" is updated to point past the source string (but may not
* point to the next tag entry).
*
* Obviously, this need a few more comments. . . .
*/
PRIVATE int
eval_symbol(symbol, hp)
char **symbol;
struct host *hp;
{
char tmpstr[MAXSTRINGLEN];
byte *tmphaddr;
struct symbolmap *symbolptr;
u_int32_t value;
int32_t timeoff;
int i, numsymbols;
unsigned len;
int optype; /* Indicates boolean, addition, or deletion */
eat_whitespace(symbol);
/* Make sure this is set before returning. */
current_tagname[0] = (*symbol)[0];
current_tagname[1] = (*symbol)[1];
current_tagname[2] = 0;
if ((*symbol)[0] == '\0') {
return E_END_OF_ENTRY;
}
if ((*symbol)[0] == ':') {
return SUCCESS;
}
if ((*symbol)[0] == 'T') { /* generic symbol */
(*symbol)++;
value = get_u_long(symbol);
sprintf(current_tagname, "T%d", (int)value);
eat_whitespace(symbol);
if ((*symbol)[0] != '=') {
return E_SYNTAX_ERROR;
}
(*symbol)++;
if (!(hp->generic)) {
hp->generic = (struct shared_bindata *)
smalloc(sizeof(struct shared_bindata));
}
if (process_generic(symbol, &(hp->generic), (byte) (value & 0xFF)))
return E_SYNTAX_ERROR;
hp->flags.generic = TRUE;
return SUCCESS;
}
/*
* Determine the type of operation to be done on this symbol
*/
switch ((*symbol)[2]) {
case '=':
optype = OP_ADDITION;
break;
case '@':
optype = OP_DELETION;
break;
case ':':
case '\0':
optype = OP_BOOLEAN;
break;
default:
return E_SYNTAX_ERROR;
}
symbolptr = symbol_list;
numsymbols = sizeof(symbol_list) / sizeof(struct symbolmap);
for (i = 0; i < numsymbols; i++) {
if (((symbolptr->symbol)[0] == (*symbol)[0]) &&
((symbolptr->symbol)[1] == (*symbol)[1])) {
break;
}
symbolptr++;
}
if (i >= numsymbols) {
return E_UNKNOWN_SYMBOL;
}
/*
* Skip past the = or @ character (to point to the data) if this
* isn't a boolean operation. For boolean operations, just skip
* over the two-character tag symbol (and nothing else. . . .).
*/
(*symbol) += (optype == OP_BOOLEAN) ? 2 : 3;
eat_whitespace(symbol);
/* The cases below are in order by symbolcode value. */
switch (symbolptr->symbolcode) {
case SYM_BOOTFILE:
PARSE_STR(bootfile);
break;
case SYM_COOKIE_SERVER:
PARSE_IAL(cookie_server);
break;
case SYM_DOMAIN_SERVER:
PARSE_IAL(domain_server);
break;
case SYM_GATEWAY:
PARSE_IAL(gateway);
break;
case SYM_HWADDR:
if (optype == OP_BOOLEAN)
return E_SYNTAX_ERROR;
hp->flags.haddr = FALSE;
if (optype == OP_ADDITION) {
/* Default the HW type to Ethernet */
if (hp->flags.htype == 0) {
hp->flags.htype = TRUE;
hp->htype = HTYPE_ETHERNET;
}
tmphaddr = prs_haddr(symbol, hp->htype);
if (!tmphaddr)
return E_BAD_HWADDR;
bcopy(tmphaddr, hp->haddr, haddrlength(hp->htype));
hp->flags.haddr = TRUE;
}
break;
case SYM_HOMEDIR:
PARSE_STR(homedir);
break;
case SYM_HTYPE:
if (optype == OP_BOOLEAN)
return E_SYNTAX_ERROR;
hp->flags.htype = FALSE;
if (optype == OP_ADDITION) {
value = 0L; /* Assume an illegal value */
eat_whitespace(symbol);
if (isdigit(**symbol)) {
value = get_u_long(symbol);
} else {
len = sizeof(tmpstr);
(void) get_string(symbol, tmpstr, &len);
makelower(tmpstr);
numsymbols = sizeof(htnamemap) /
sizeof(struct htypename);
for (i = 0; i < numsymbols; i++) {
if (!strcmp(htnamemap[i].name, tmpstr)) {
break;
}
}
if (i < numsymbols) {
value = htnamemap[i].htype;
}
}
if (value >= hwinfocnt) {
return E_BAD_HWATYPE;
}
hp->htype = (byte) (value & 0xFF);
hp->flags.htype = TRUE;
}
break;
case SYM_IMPRESS_SERVER:
PARSE_IAL(impress_server);
break;
case SYM_IPADDR:
PARSE_IA1(iaddr);
break;
case SYM_LOG_SERVER:
PARSE_IAL(log_server);
break;
case SYM_LPR_SERVER:
PARSE_IAL(lpr_server);
break;
case SYM_NAME_SERVER:
PARSE_IAL(name_server);
break;
case SYM_RLP_SERVER:
PARSE_IAL(rlp_server);
break;
case SYM_SUBNET_MASK:
PARSE_IA1(subnet_mask);
break;
case SYM_TIME_OFFSET:
if (optype == OP_BOOLEAN)
return E_SYNTAX_ERROR;
hp->flags.time_offset = FALSE;
if (optype == OP_ADDITION) {
len = sizeof(tmpstr);
(void) get_string(symbol, tmpstr, &len);
if (!strncmp(tmpstr, "auto", 4)) {
hp->time_offset = secondswest;
} else {
if (sscanf(tmpstr, "%d", (int*)&timeoff) != 1)
return E_BAD_LONGWORD;
hp->time_offset = timeoff;
}
hp->flags.time_offset = TRUE;
}
break;
case SYM_TIME_SERVER:
PARSE_IAL(time_server);
break;