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/*!
* \file cf-lex.l
*
* \author Ondrej Sury <ondrej.sury@nic.cz>
*
* \brief Server configuration structures and API.
*
* IP address conversions from BIRD, (c) 1998--2000 Martin Mares <mj@ucw.cz>
*/
%{
#include <errno.h>
#include <stdlib.h>
#include <stdarg.h>
#include "common/sockaddr.h"
#include "knot/conf/conf.h"
#include "common/log.h"
#include "libknotd_la-cf-parse.h" /* Automake generated header. */
/* Imported symbols. */
#define lval (yylval->tok)
extern void cf_error(void *scanner, const char *msg);
extern int (*cf_read_hook)(char *buf, size_t nbytes);
void switch_input(const char *str, void *scanner)
{
yy_scan_string(str, scanner);
}
/* Convert hex to binary. */
static inline char xd(char d) {
if (d >= '0' && d <= '9') return d - '0';
if (d >= 'a' && d <= 'f') return d - 'a' + 10;
if (d >= 'A' && d <= 'F') return d - 'A' + 10;
return 0;
}
int hex2bin(const char* src, char *dst, size_t len) {
for (unsigned i = 0; i < len; ++i) {
dst[i] = (xd(src[i<<1])<<4) + xd(src[(i<<1)+1]);
}
return 0;
}
//#define YY_INPUT(buf,result,max) result = cf_read_hook(buf, max);
#define YY_NO_UNPUT
%}
%option reentrant
%option bison-bridge
%option noyywrap
%option noinput
%option nounput
%option noreject
%option yylineno
%option prefix = "cf_"
%option outfile = "lex.yy.c"
ALPHA [a-zA-Z_]
DIGIT [0-9]
HEXA [0-9a-fA-F]
ALNUM [a-zA-Z_0-9]
BLANK [ \t\n]
%%
\#.*\n /* Ignore comments */;
{BLANK}+ /* Ignore whitespace */;
[\!\$\%\^\&\*\(\)\/\+\-\@\{\}\;\,] { return yytext[0]; }
system { lval.t = yytext; return SYSTEM; }
identity { lval.t = yytext; return IDENTITY; }
version { lval.t = yytext; return VERSION; }
nsid { lval.t = yytext; return NSID; }
storage { lval.t = yytext; return STORAGE; }
key { lval.t = yytext; return KEY; }
keys { lval.t = yytext; return KEYS; }
remotes { lval.t = yytext; return REMOTES; }
zones { lval.t = yytext; return ZONES; }
file { lval.t = yytext; return FILENAME; }
disable-any { lval.t = yytext; return DISABLE_ANY; }
semantic-checks { lval.t = yytext; return SEMANTIC_CHECKS; }
notify-retries { lval.t = yytext; return NOTIFY_RETRIES; }
notify-timeout { lval.t = yytext; return NOTIFY_TIMEOUT; }
zonefile-sync { lval.t = yytext; return DBSYNC_TIMEOUT; }
ixfr-fslimit { lval.t = yytext; return IXFR_FSLIMIT; }
xfr-in { lval.t = yytext; return XFR_IN; }
xfr-out { lval.t = yytext; return XFR_OUT; }
notify-in { lval.t = yytext; return NOTIFY_IN; }
notify-out { lval.t = yytext; return NOTIFY_OUT; }
workers { lval.t = yytext; return WORKERS; }
user { lval.t = yytext; return USER; }
pidfile { lval.t = yytext; return PIDFILE; }
ixfr-from-differences { lval.t = yytext; return BUILD_DIFFS; }
interfaces { lval.t = yytext; return INTERFACES; }
address { lval.t = yytext; return ADDRESS; }
port { lval.t = yytext; return PORT; }
via { lval.t = yytext; return VIA; }
log { lval.t = yytext; return LOG; }
any { lval.t = yytext; lval.i = LOG_ANY; return LOG_SRC; }
server { lval.t = yytext; lval.i = LOG_SERVER; return LOG_SRC; }
answering { lval.t = yytext; lval.i = LOG_ANSWER; return LOG_SRC; }
zone { lval.t = yytext; lval.i = LOG_ZONE; return LOG_SRC; }
stdout { lval.t = yytext; lval.i = LOGT_STDOUT; return LOG_DEST; }
stderr { lval.t = yytext; lval.i = LOGT_STDERR; return LOG_DEST; }
syslog { lval.t = yytext; lval.i = LOGT_SYSLOG; return LOG_DEST; }
all { lval.t = yytext; lval.i = LOG_UPTO(LOG_DEBUG); return LOG_LEVEL; }
debug { lval.t = yytext; lval.i = LOG_MASK(LOG_DEBUG); return LOG_LEVEL; }
info { lval.t = yytext; lval.i = LOG_MASK(LOG_INFO); return LOG_LEVEL; }
notice { lval.t = yytext; lval.i = LOG_MASK(LOG_NOTICE); return LOG_LEVEL; }
warning { lval.t = yytext; lval.i = LOG_MASK(LOG_WARNING); return LOG_LEVEL; }
error { lval.t = yytext; lval.i = LOG_MASK(LOG_ERR); return LOG_LEVEL; }
on|off {
lval.t = yytext;
lval.i = 0;
if (strcmp(yytext, "on") == 0) {
lval.i = 1;
}
return BOOL;
}
{DIGIT}+[smhd] {
size_t mpos = strlen(yytext) - 1;
char multiplier = yytext[mpos];
yytext[mpos] = '\0';
lval.i = atoi(yytext);
if (lval.i < 1) {
cf_error(yyscanner, "interval must be a positive integer");
return END;
}
/* Handle multiplier. */
switch(multiplier) {
case 'm': lval.i *= 60; break; /* minutes */
case 'h': lval.i *= 60*60; break; /* hours */
case 'd': lval.i *= 24*60*60; break; /* days */
case 's': /* seconds */
default: break;
}
return INTERVAL;
}
{DIGIT}+[kMG] {
size_t mpos = strlen(yytext) - 1;
char multiplier = yytext[mpos];
yytext[mpos] = '\0';
lval.i = atol(yytext);
if (lval.i < 1) {
cf_error(yyscanner, "size must be a positive integer");
return END;
}
/* Handle multiplier. */
switch(multiplier) {
case 'k': lval.l = lval.i * 1024; break; /* kB */
case 'M': lval.l = lval.i * 1024*1024; break; /* MB */
case 'G': lval.l = lval.i * 1024*1024*1024; break; /* GB */
default: break;
}
return SIZE;
}
{DIGIT}+ {
lval.i = atol(yytext);
return NUM;
}
{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+ {
unsigned char buf[sizeof(struct in_addr)];
if (inet_pton(AF_INET, yytext, buf)) {
lval.t = strdup(yytext);
return IPA;
}
cf_error(yyscanner, "Invalid IP address.");
}
\[({HEXA}*::|({HEXA}*:){3,})({HEXA}*|{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+)\] {
#ifdef DISABLE_IPV6
lval.t = strdup(yytext);
cf_error(yyscanner, "IPv6 address support not compiled.");
return TEXT;
#else
unsigned char buf[sizeof(struct in6_addr)];
yytext[strlen(yytext)-1] = '\0';
if (inet_pton(AF_INET6, yytext+1, buf)) {
lval.t = strdup(yytext+1);
return IPA6;
}
cf_error(yyscanner, "Invalid IPv6 address.");
#endif
}
({HEXA}*::|({HEXA}*:){3,})({HEXA}*|{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+) {
#ifdef DISABLE_IPV6
lval.t = strdup(yytext);
cf_error(yyscanner, "IPv6 address support not compiled.");
return TEXT;
#else
unsigned char buf[sizeof(struct in6_addr)];
if (inet_pton(AF_INET6, yytext, buf)) {
lval.t = strdup(yytext);
return IPA6;
}
cf_error(yyscanner, "Invalid IPv6 address.");
#endif
}
[0][x]{HEXA}+ {
lval.t = NULL;
lval.l = 0;
yytext = yytext + 2; /* Cut off 0x */
size_t dlen = strlen(yytext);
if (dlen % 2 == 1) {
cf_error(yyscanner, "Invalid hex-string length.");
} else {
dlen = dlen / 2;
lval.t = malloc((dlen) * sizeof(char));
if (lval.t == NULL) {
cf_error(yyscanner, "Out of memory when allocating hex-string.\n");
} else {
memset(lval.t, 0, dlen);
if (hex2bin(yytext, lval.t, dlen) < 0) {
cf_error(yyscanner, "Failed to convert hex-string to binary.\n");
} else {
lval.l = dlen;
}
}
}
return HEXSTR;
}
gss-tsig { lval.alg = KNOT_TSIG_ALG_GSS_TSIG; return TSIG_ALGO_NAME; }
hmac-md5 { lval.alg = KNOT_TSIG_ALG_HMAC_MD5; return TSIG_ALGO_NAME; }
hmac-sha1 { lval.alg = KNOT_TSIG_ALG_HMAC_SHA1; return TSIG_ALGO_NAME; }
hmac-sha224 { lval.alg = KNOT_TSIG_ALG_HMAC_SHA224; return TSIG_ALGO_NAME; }
hmac-sha256 { lval.alg = KNOT_TSIG_ALG_HMAC_SHA256; return TSIG_ALGO_NAME; }
hmac-sha384 { lval.alg = KNOT_TSIG_ALG_HMAC_SHA384; return TSIG_ALGO_NAME; }
hmac-sha512 { lval.alg = KNOT_TSIG_ALG_HMAC_SHA512; return TSIG_ALGO_NAME; }
["][^"\n]*["] {
yytext[yyleng-1] = 0;
lval.t = strdup(yytext + 1);
return TEXT;
}
["][^"\n]*\n cf_error(yyscanner, "Unterminated string.");
[a-zA-Z0-9\.\-\_]+ {
lval.t = strdup(yytext);
return TEXT /* Last resort, alphanumeric word. */;
}
: /* Optional : in assignments. */;
<<EOF>> return END;
%%
|
