+ fclose(f);
+ fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
+ return NULL;
+}
+
+#define VAR_SERVER 1 /* Should be in tinc.conf */
+#define VAR_HOST 2 /* Can be in host config file */
+#define VAR_MULTIPLE 4 /* Multiple statements allowed */
+#define VAR_OBSOLETE 8 /* Should not be used anymore */
+
+static struct {
+ const char *name;
+ int type;
+} const variables[] = {
+ /* Server configuration */
+ {"AddressFamily", VAR_SERVER},
+ {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
+ {"BindToInterface", VAR_SERVER},
+ {"Broadcast", VAR_SERVER},
+ {"ConnectTo", VAR_SERVER | VAR_MULTIPLE},
+ {"DecrementTTL", VAR_SERVER},
+ {"Device", VAR_SERVER},
+ {"DeviceType", VAR_SERVER},
+ {"DirectOnly", VAR_SERVER},
+ {"ECDSAPrivateKeyFile", VAR_SERVER},
+ {"ExperimentalProtocol", VAR_SERVER},
+ {"Forwarding", VAR_SERVER},
+ {"GraphDumpFile", VAR_SERVER},
+ {"Hostnames", VAR_SERVER},
+ {"IffOneQueue", VAR_SERVER},
+ {"Interface", VAR_SERVER},
+ {"KeyExpire", VAR_SERVER},
+ {"LocalDiscovery", VAR_SERVER},
+ {"MACExpire", VAR_SERVER},
+ {"MaxTimeout", VAR_SERVER},
+ {"Mode", VAR_SERVER},
+ {"Name", VAR_SERVER},
+ {"PingInterval", VAR_SERVER},
+ {"PingTimeout", VAR_SERVER},
+ {"PriorityInheritance", VAR_SERVER},
+ {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
+ {"PrivateKeyFile", VAR_SERVER},
+ {"ProcessPriority", VAR_SERVER},
+ {"ReplayWindow", VAR_SERVER},
+ {"StrictSubnets", VAR_SERVER},
+ {"TunnelServer", VAR_SERVER},
+ {"UDPRcvBuf", VAR_SERVER},
+ {"UDPSndBuf", VAR_SERVER},
+ /* Host configuration */
+ {"Address", VAR_HOST | VAR_MULTIPLE},
+ {"Cipher", VAR_SERVER | VAR_HOST},
+ {"ClampMSS", VAR_SERVER | VAR_HOST},
+ {"Compression", VAR_SERVER | VAR_HOST},
+ {"Digest", VAR_SERVER | VAR_HOST},
+ {"IndirectData", VAR_SERVER | VAR_HOST},
+ {"MACLength", VAR_SERVER | VAR_HOST},
+ {"PMTU", VAR_SERVER | VAR_HOST},
+ {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
+ {"Port", VAR_HOST},
+ {"PublicKey", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
+ {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
+ {"Subnet", VAR_HOST | VAR_MULTIPLE},
+ {"TCPOnly", VAR_SERVER | VAR_HOST},
+ {NULL, 0}
+};
+
+static int cmd_config(int argc, char *argv[]) {
+ if(argc < 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ int action = 0;
+ if(!strcasecmp(argv[1], "add")) {
+ argv++, argc--, action = 1;
+ } else if(!strcasecmp(argv[1], "del")) {
+ argv++, argc--, action = -1;
+ } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
+ argv++, argc--, action = 0;
+ }
+
+ if(argc < 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ // Concatenate the rest of the command line
+ strncpy(line, argv[1], sizeof line - 1);
+ for(int i = 2; i < argc; i++) {
+ strncat(line, " ", sizeof line - 1 - strlen(line));
+ strncat(line, argv[i], sizeof line - 1 - strlen(line));
+ }
+
+ // Liberal parsing into node name, variable name and value.
+ char *node = NULL;
+ char *variable;
+ char *value;
+ int len;
+
+ len = strcspn(line, "\t =");
+ value = line + len;
+ value += strspn(value, "\t ");
+ if(*value == '=') {
+ value++;
+ value += strspn(value, "\t ");
+ }
+ line[len] = '\0';
+ variable = strchr(line, '.');
+ if(variable) {
+ node = line;
+ *variable++ = 0;
+ } else {
+ variable = line;
+ }
+
+ if(!*variable) {
+ fprintf(stderr, "No variable given.\n");
+ return 1;
+ }
+
+ if(action >= 0 && !*value) {
+ fprintf(stderr, "No value for variable given.\n");
+ return 1;
+ }
+
+ /* Some simple checks. */
+ bool found = false;
+
+ for(int i = 0; variables[i].name; i++) {
+ if(strcasecmp(variables[i].name, variable))
+ continue;
+
+ found = true;
+ variable = (char *)variables[i].name;
+
+ /* Discourage use of obsolete variables. */
+
+ if(variables[i].type & VAR_OBSOLETE && action >= 0) {
+ if(force) {
+ fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
+ } else {
+ fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
+ return 1;
+ }