Partial implementation of a config files parser

1 files changed, 106 insertions, 0 deletions

diff --git a/src/config.y b/src/config.y
new file mode 100644
index 0000000..08c5050
--- /dev/null
+++ b/src/config.y
@@ -0,0 +1,106 @@
+%define api.pure
+%name-prefix "fastd_config_"
+%lex-param {fastd_context *ctx}
+%lex-param {yyscan_t scanner}
+%parse-param {fastd_context *ctx}
+%parse-param {fastd_config *config}
+%parse-param {yyscan_t scanner}
+
+%code requires {
+	#include <arpa/inet.h>
+}
+
+%union {
+	int num;
+	char* str;
+	struct in_addr addr;
+	struct in6_addr addr6;
+}
+
+%token <num> TOK_INTEGER
+%token <str> TOK_STRING
+%token <str> TOK_IDENTIFIER
+
+%token <str> TOK_INTERFACE
+%token <str> TOK_BIND
+%token <str> TOK_MTU
+%token <str> TOK_MODE
+%token <str> TOK_PROTOCOL
+%token <str> TOK_PEER
+
+%token <addr> TOK_ADDR
+%token <addr6> TOK_ADDR6
+
+%token <str> TOK_ANY
+%token <str> TOK_FLOAT
+%token <str> TOK_TAP
+%token <str> TOK_TUN
+
+/*			%code top {
+	#define YY_DECL int fastd_config_lex(YYSTYPE *yylval_param, fastd_context *ctx, yyscan_t yyscanner)
+}*/			
+
+
+%code {
+	#include <config.ll.h>
+	YY_DECL;
+
+	void fastd_config_error(fastd_context *ctx, fastd_config *config, void *scanner, char *s);
+}
+
+%code provides {
+	 #include <fastd.h>
+	int fastd_config_parse (fastd_context *ctx, fastd_config *config, void *scanner);
+}
+
+%%
+config:		config statement
+	|
+	;
+
+statement:	TOK_INTERFACE interface ';'
+	| 	TOK_BIND bind ';'
+	|	TOK_MTU mtu ';'
+	|	TOK_MODE mode ';'
+	|	TOK_PROTOCOL protocol ';'
+	|	TOK_PEER peer '{' peer_config '}'
+	;
+
+interface:	TOK_STRING	{ config->ifname = strdup($1); }
+	;
+
+bind:		TOK_ADDR
+	|	TOK_ADDR ':' port
+	|	TOK_ADDR6
+	|	TOK_ADDR6 ':' port
+	|	TOK_ANY
+	|	TOK_ANY ':' port
+	;
+
+mtu:		TOK_INTEGER	{ config->mtu = $1; }
+	;
+
+mode:		TOK_TAP	{ config->mode = MODE_TAP; }
+	|	TOK_TUN	{ config->mode = MODE_TUN; }
+	;
+
+protocol:	TOK_STRING
+	;
+
+peer:		TOK_STRING
+	|
+	;
+
+peer_config:	peer_config peer_statement
+	|
+	;
+
+peer_statement: ':'
+	;
+
+port:		TOK_INTEGER
+	;
+%%
+void fastd_config_error(fastd_context *ctx, fastd_config *config, yyscan_t scanner, char *s) {
+	exit_error(ctx, "config error: %s", s);
+}