int
parse_option_decl(FILE *cfile, struct option_data *options)
{
char *val;
int token;
u_int8_t buf[4];
u_int8_t hunkbuf[1024];
int hunkix = 0;
char *fmt;
struct iaddr ip_addr;
u_int8_t *dp;
int len, code;
int nul_term = 0;
token = next_token(&val, cfile);
if (!is_identifier(token)) {
parse_warn("expecting identifier after option keyword.");
if (token != ';')
skip_to_semi(cfile);
return (-1);
}
/* Look up the actual option info. */
fmt = NULL;
for (code = 0; code < 256; code++)
if (strcmp(dhcp_options[code].name, val) == 0)
break;
if (code > 255) {
parse_warn("no option named %s", val);
skip_to_semi(cfile);
return (-1);
}
/* Parse the option data... */
do {
for (fmt = dhcp_options[code].format; *fmt; fmt++) {
if (*fmt == 'A')
break;
switch (*fmt) {
case 'X':
len = parse_X(cfile, &hunkbuf[hunkix],
sizeof(hunkbuf) - hunkix);
hunkix += len;
break;
case 't': /* Text string... */
token = next_token(&val, cfile);
if (token != TOK_STRING) {
parse_warn("expecting string.");
skip_to_semi(cfile);
return (-1);
}
len = strlen(val);
if (hunkix + len + 1 > sizeof(hunkbuf)) {
parse_warn("option data buffer %s",
"overflow");
skip_to_semi(cfile);
return (-1);
}
memcpy(&hunkbuf[hunkix], val, len + 1);
nul_term = 1;
hunkix += len;
break;
case 'I': /* IP address. */
if (!parse_ip_addr(cfile, &ip_addr))
return (-1);
len = ip_addr.len;
dp = ip_addr.iabuf;
alloc:
if (hunkix + len > sizeof(hunkbuf)) {
parse_warn("option data buffer "
"overflow");
skip_to_semi(cfile);
return (-1);
}
memcpy(&hunkbuf[hunkix], dp, len);
hunkix += len;
break;
case 'L': /* Unsigned 32-bit integer... */
case 'l': /* Signed 32-bit integer... */
token = next_token(&val, cfile);
if (token != TOK_NUMBER) {
need_number:
parse_warn("expecting number.");
if (token != ';')
skip_to_semi(cfile);
return (-1);
}
convert_num(buf, val, 0, 32);
len = 4;
dp = buf;
goto alloc;
case 's': /* Signed 16-bit integer. */
case 'S': /* Unsigned 16-bit integer. */
token = next_token(&val, cfile);
if (token != TOK_NUMBER)
goto need_number;
convert_num(buf, val, 0, 16);
len = 2;
dp = buf;
goto alloc;
case 'b': /* Signed 8-bit integer. */
case 'B': /* Unsigned 8-bit integer. */
token = next_token(&val, cfile);
if (token != TOK_NUMBER)
goto need_number;
convert_num(buf, val, 0, 8);
len = 1;
dp = buf;
goto alloc;
case 'f': /* Boolean flag. */
token = next_token(&val, cfile);
if (!is_identifier(token)) {
parse_warn("expecting identifier.");
bad_flag:
if (token != ';')
skip_to_semi(cfile);
return (-1);
}
if (!strcasecmp(val, "true") ||
!strcasecmp(val, "on"))
buf[0] = 1;
else if (!strcasecmp(val, "false") ||
!strcasecmp(val, "off"))
buf[0] = 0;
else {
parse_warn("expecting boolean.");
goto bad_flag;
}
len = 1;
dp = buf;
goto alloc;
default:
warning("Bad format %c in parse_option_param.",
*fmt);
skip_to_semi(cfile);
return (-1);
}
}
token = next_token(&val, cfile);
} while (*fmt == 'A' && token == ',');
if (token != ';') {
parse_warn("semicolon expected.");
skip_to_semi(cfile);
return (-1);
}
options[code].data = malloc(hunkix + nul_term);
if (!options[code].data)
error("out of memory allocating option data.");
memcpy(options[code].data, hunkbuf, hunkix + nul_term);
options[code].len = hunkix;
return (code);
}
struct option *
parse_option_decl(FILE *cfile, struct option_data *options)
{
char *val;
int token;
u_int8_t buf[4];
u_int8_t hunkbuf[1024];
int hunkix = 0;
char *vendor;
char *fmt;
struct universe *universe;
struct option *option;
struct iaddr ip_addr;
u_int8_t *dp;
int len;
int nul_term = 0;
token = next_token(&val, cfile);
if (!is_identifier(token)) {
parse_warn("expecting identifier after option keyword.");
if (token != SEMI)
skip_to_semi(cfile);
return (NULL);
}
if ((vendor = strdup(val)) == NULL)
error("no memory for vendor information.");
token = peek_token(&val, cfile);
if (token == DOT) {
/* Go ahead and take the DOT token... */
token = next_token(&val, cfile);
/* The next token should be an identifier... */
token = next_token(&val, cfile);
if (!is_identifier(token)) {
parse_warn("expecting identifier after '.'");
if (token != SEMI)
skip_to_semi(cfile);
return (NULL);
}
/* Look up the option name hash table for the specified
vendor. */
universe = ((struct universe *)hash_lookup(&universe_hash,
(unsigned char *)vendor, 0));
/* If it's not there, we can't parse the rest of the
declaration. */
if (!universe) {
parse_warn("no vendor named %s.", vendor);
skip_to_semi(cfile);
return (NULL);
}
} else {
/* Use the default hash table, which contains all the
standard dhcp option names. */
val = vendor;
universe = &dhcp_universe;
}
/* Look up the actual option info... */
option = (struct option *)hash_lookup(universe->hash,
(unsigned char *)val, 0);
/* If we didn't get an option structure, it's an undefined option. */
if (!option) {
if (val == vendor)
parse_warn("no option named %s", val);
else
parse_warn("no option named %s for vendor %s",
val, vendor);
skip_to_semi(cfile);
return (NULL);
}
/* Free the initial identifier token. */
free(vendor);
/* Parse the option data... */
do {
for (fmt = option->format; *fmt; fmt++) {
if (*fmt == 'A')
break;
switch (*fmt) {
case 'X':
len = parse_X(cfile, &hunkbuf[hunkix],
sizeof(hunkbuf) - hunkix);
hunkix += len;
break;
case 't': /* Text string... */
token = next_token(&val, cfile);
if (token != STRING) {
parse_warn("expecting string.");
skip_to_semi(cfile);
return (NULL);
}
len = strlen(val);
if (hunkix + len + 1 > sizeof(hunkbuf)) {
parse_warn("option data buffer %s",
"overflow");
skip_to_semi(cfile);
return (NULL);
}
memcpy(&hunkbuf[hunkix], val, len + 1);
nul_term = 1;
hunkix += len;
break;
case 'I': /* IP address. */
if (!parse_ip_addr(cfile, &ip_addr))
return (NULL);
len = ip_addr.len;
dp = ip_addr.iabuf;
alloc:
if (hunkix + len > sizeof(hunkbuf)) {
parse_warn("option data buffer "
"overflow");
skip_to_semi(cfile);
return (NULL);
}
memcpy(&hunkbuf[hunkix], dp, len);
hunkix += len;
break;
case 'L': /* Unsigned 32-bit integer... */
case 'l': /* Signed 32-bit integer... */
token = next_token(&val, cfile);
if (token != NUMBER) {
need_number:
parse_warn("expecting number.");
if (token != SEMI)
skip_to_semi(cfile);
return (NULL);
}
convert_num(buf, val, 0, 32);
len = 4;
dp = buf;
goto alloc;
case 's': /* Signed 16-bit integer. */
case 'S': /* Unsigned 16-bit integer. */
token = next_token(&val, cfile);
if (token != NUMBER)
goto need_number;
convert_num(buf, val, 0, 16);
len = 2;
dp = buf;
goto alloc;
case 'b': /* Signed 8-bit integer. */
case 'B': /* Unsigned 8-bit integer. */
token = next_token(&val, cfile);
if (token != NUMBER)
goto need_number;
convert_num(buf, val, 0, 8);
len = 1;
dp = buf;
goto alloc;
case 'f': /* Boolean flag. */
token = next_token(&val, cfile);
if (!is_identifier(token)) {
parse_warn("expecting identifier.");
bad_flag:
if (token != SEMI)
skip_to_semi(cfile);
return (NULL);
}
if (!strcasecmp(val, "true") ||
!strcasecmp(val, "on"))
buf[0] = 1;
else if (!strcasecmp(val, "false") ||
!strcasecmp(val, "off"))
buf[0] = 0;
else {
parse_warn("expecting boolean.");
goto bad_flag;
}
len = 1;
dp = buf;
goto alloc;
default:
warning("Bad format %c in parse_option_param.",
*fmt);
skip_to_semi(cfile);
return (NULL);
}
}
token = next_token(&val, cfile);
} while (*fmt == 'A' && token == COMMA);
if (token != SEMI) {
parse_warn("semicolon expected.");
skip_to_semi(cfile);
return (NULL);
}
options[option->code].data = malloc(hunkix + nul_term);
if (!options[option->code].data)
error("out of memory allocating option data.");
memcpy(options[option->code].data, hunkbuf, hunkix + nul_term);
options[option->code].len = hunkix;
return (option);
}
