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|
%{
/*
* (C) 2014 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <netinet/in.h>
#include "config.h"
#include "logging.h"
extern char *yytext;
extern int yylineno;
static int parse_addr(const char *text, struct in_addr *addr,
uint16_t *port)
{
char *colon = strchr(text, ':');
if (colon == NULL) {
fprintf(stderr, "missing `:' to indicate port\n");
return -1;
}
*colon = '\0';
if (inet_pton(AF_INET, text, addr) < 0) {
fprintf(stderr, "%s not valid IPv4 address\n", text);
return -1;
}
*port = atoi(colon + 1);
return 0;
}
%}
%union {
int val;
char *string;
}
%token T_LOCAL_ADDR
%token T_REMOTE_ADDR
%token T_ADDR
%token T_NUMBER
%token T_LOG
%token T_MODE
%token <string> T_STRING
%token <val> T_INTEGER
%%
configfile :
| sections
;
sections : section
| sections section
;
section : network
| log
;
network : local_addr
| remote_addr
;
local_addr : T_LOCAL_ADDR T_STRING
{
nfts_inst.tcp.ipproto = AF_INET;
if (parse_addr($2,
&nfts_inst.tcp.server.ipv4.inet_addr,
&nfts_inst.tcp.port) < 0)
break;
nfts_inst.mode = NFTS_MODE_SERVER;
}
;
remote_addr : T_REMOTE_ADDR T_STRING
{
nfts_inst.tcp.ipproto = AF_INET;
if (parse_addr($2, &nfts_inst.tcp.client.inet_addr,
&nfts_inst.tcp.port) < 0)
break;
nfts_inst.mode = NFTS_MODE_CLIENT;
}
;
log : T_LOG T_STRING
{
if (strcmp($2, "syslog") == 0) {
nfts_inst.log.type = NFTS_LOG_T_SYSLOG;
} else if (strcmp($2, "stdout") == 0) {
nfts_inst.log.type = NFTS_LOG_T_FILE;
nfts_inst.log.color = true;
} else {
nfts_inst.log.type = NFTS_LOG_T_FILE;
strncpy(nfts_inst.log.filename, $2, PATH_MAX);
nfts_inst.log.filename[PATH_MAX - 1] = '\0';
}
}
;
%%
int __attribute__((noreturn)) yyerror(char *msg)
{
fprintf(stderr, "parsing config file in line (%d), symbol '%s': %s\n",
yylineno, yytext, msg);
exit(EXIT_FAILURE);
}
int nft_sync_config_parse(const char *filename)
{
FILE *fp;
fp = fopen(filename, "r");
if (!fp) {
fprintf(stderr, "Cannot open configuration file %s\n",
filename);
return -1;
}
yyrestart(fp);
yyparse();
fclose(fp);
return 0;
}
|
