Add keypair config

src/config.c

@@ -65,6 +65,7 @@ static void default_config(fastd_config *conf) {
 	conf->mtu = 1500;
 	conf->mode = MODE_TAP;
 	conf->protocol = &fastd_protocol_null;
+	conf->secret = NULL;
 	conf->peers = NULL;
 }
 
@@ -90,16 +91,22 @@ static bool config_match(const char *opt, ...) {
 static void fastd_read_config(fastd_context *ctx, fastd_config *conf, const char *filename) {
 	yyscan_t scanner;
 	FILE *file;
+	bool use_stdin = !strcmp(filename, "-");
+
+	if (use_stdin)
+		file = stdin;
+	else
+		file = fopen(filename, "r");
 
-	file = fopen(filename, "r");
 	fastd_config_lex_init(&scanner);
-
 	fastd_config_set_in(file, scanner);
 
 	fastd_config_parse(ctx, conf, scanner);
 
 	fastd_config_lex_destroy(scanner);
-	fclose(file);
+
+	if (!use_stdin)
+		fclose(file);
 }
 
 #define IF_OPTION(args...) if(config_match(argv[i], args, NULL) && (++i))
@@ -131,7 +138,8 @@ void fastd_configure(fastd_context *ctx, fastd_config *conf, int argc, char *con
 		}
 
 		IF_OPTION_ARG("-i", "--interface") {
-			conf->ifname = arg;
+			free(conf->ifname);
+			conf->ifname = strdup(arg);
 			continue;
 		}
 
@@ -160,7 +168,7 @@ void fastd_configure(fastd_context *ctx, fastd_config *conf, int argc, char *con
 
 			if (charptr) {
 				l = strtol(charptr+1, &endptr, 10);
-				if (*endptr || l > 65535)
+				if (*endptr || l < 0 || l > 65535)
 					exit_error(ctx, "invalid bind port `%s'", charptr+1);
 			}
 			else {
@@ -255,7 +263,7 @@ void fastd_configure(fastd_context *ctx, fastd_config *conf, int argc, char *con
 
 			if (charptr) {
 				l = strtol(charptr+1, &endptr, 10);
-				if (*endptr || l > 65535)
+				if (*endptr || l < 0 || l > 65535)
 					exit_error(ctx, "invalid peer port `%s'", charptr+1);
 			}
 			else {

src/config.l

@@ -20,6 +20,8 @@ mode		{ yylval->str = yytext; return TOK_MODE; }
 protocol	{ yylval->str = yytext; return TOK_PROTOCOL; }
 peer		{ yylval->str = yytext; return TOK_PEER; }
 address		{ yylval->str = yytext; return TOK_ADDRESS; }
+secret		{ yylval->str = yytext; return TOK_SECRET; }
+key		{ yylval->str = yytext; return TOK_KEY; }
 
 [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} {
 			if (!inet_pton(AF_INET, yytext, &yylval->addr)) {

src/config.y

@@ -29,6 +29,8 @@
 %token <str> TOK_PROTOCOL
 %token <str> TOK_PEER
 %token <str> TOK_ADDRESS
+%token <str> TOK_SECRET
+%token <str> TOK_KEY
 
 %token <addr> TOK_ADDR
 %token <addr6> TOK_ADDR6
@@ -73,10 +75,11 @@ statement:	TOK_INTERFACE interface ';'
 	|	TOK_MTU mtu ';'
 	|	TOK_MODE mode ';'
 	|	TOK_PROTOCOL protocol ';'
+	|	TOK_SECRET secret ';'
 	|	TOK_PEER peer '{' peer_conf '}'
 	;
 
-interface:	TOK_STRING	{ conf->ifname = strdup($1); }
+interface:	TOK_STRING	{ free(conf->ifname); conf->ifname = strdup($1); }
 	;
 
 bind:		TOK_ADDR maybe_port {
@@ -116,6 +119,9 @@ protocol:	maybe_string {
 }
 	;
 
+secret:		TOK_STRING	{ free(conf->secret); conf->secret = strdup($1); }
+	;
+
 peer:		maybe_string {
 			fastd_peer_config *current_peer = malloc(sizeof(fastd_peer_config));
 			current_peer->next = conf->peers;
@@ -132,6 +138,7 @@ peer_conf:	peer_conf peer_statement
 	;
 
 peer_statement: TOK_ADDRESS peer_address ';'
+	|	TOK_KEY peer_key ';'
 	;
 
 peer_address:	TOK_ADDR maybe_port_default {
@@ -146,6 +153,10 @@ peer_address:	TOK_ADDR maybe_port_default {
 		}
 	;
 
+peer_key:	TOK_STRING	{ free(conf->peers->key); conf->peers->key = strdup($1); }
+	;
+
+
 maybe_string:	TOK_STRING
 	|			{ $$[0] = '\0'; }
 	;

src/fastd.h

@@ -81,7 +81,7 @@ struct _fastd_config {
 	unsigned peer_stale_time_temp;
 	unsigned eth_addr_stale_time;
 
-	const char *ifname;
+	char *ifname;
 
 	struct sockaddr_in bind_addr_in;
 	struct sockaddr_in6 bind_addr_in6;
@@ -90,6 +90,7 @@ struct _fastd_config {
 	fastd_mode mode;
 
 	fastd_protocol *protocol;
+	char *secret;
 
 	fastd_peer_config *peers;
 

src/peer.h

@@ -56,6 +56,7 @@ struct _fastd_peer_config {
 	fastd_peer_config *next;
 
 	fastd_peer_address address;
+	char *key;
 };
 
 struct _fastd_peer_eth_addr {