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Diffstat (limited to 'src/config-parser.y')
-rw-r--r-- | src/config-parser.y | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/config-parser.y b/src/config-parser.y new file mode 100644 index 0000000..41c37b9 --- /dev/null +++ b/src/config-parser.y @@ -0,0 +1,143 @@ +%{ +/* + * (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; +} |