allow to specify maximum number of redirections with -r

For example, -r/--redirect 3 specifies that the maximum number of redirections
per client is 3.

if -r/--redirect is specified with no argument, then the argument specified by
-n/--max-clients is used.

If -n/--max-clients is not specified and -r/--redirect is specifed with no
argument, then default value is 3.

src/core.c

@@ -222,7 +222,7 @@ int tip_client_redirect_create(const struct tip_client *cli)
 	struct tip_client_redirect *redir;
 	bool found = false;
 
-	if (!redirect || !cli->allow_redirect)
+	if (!max_redirect || !cli->allow_redirect)
 		return 0;
 
 	list_for_each_entry(redir, &client_redirect_list, list) {
@@ -247,7 +247,7 @@ int tip_client_redirect_create(const struct tip_client *cli)
 	redir->addr = cli->addr;
 	redir->addr.sin_port = htons(9999);
 	redir->uri = strdup(cli->uri);
-	redir->users = max_clients;
+	redir->users = max_redirect;
 	list_add_tail(&redir->list, &client_redirect_list);
 
 	ev_timer_init(&redir->timer, tip_client_redirect_timer_cb, TIP_CLIENT_REDIRECT_TIMEOUT, 0.);
@@ -380,7 +380,7 @@ bool tip_client_redirect(struct tip_client *cli)
 	struct tip_client_redirect *redir, *next;
 	char addr[INET_ADDRSTRLEN + 1];
 
-	if (!redirect)
+	if (!max_redirect)
 		return false;
 
 	inet_ntop(AF_INET, &cli->addr.sin_addr, addr, INET_ADDRSTRLEN);

src/core.h

@@ -13,8 +13,8 @@
 extern const char *root;
 #define DEFAULT_MAX_CLIENTS 3
 extern int max_clients;
+extern int max_redirect;
 extern int num_clients;
-extern bool redirect;
 
 enum tip_client_state {
 	TIP_CLIENT_PENDING		= 0,

src/main.c

@@ -29,11 +29,11 @@
 
 int max_clients = DEFAULT_MAX_CLIENTS;
 const char *root = ".";
-bool redirect;
+int max_redirect = 0;
 
 static struct option tip_repo_opts[] = {
 	{ "max-clients", 1, 0, 'n' },
-	{ "redirect", 0, 0, 'r' },
+	{ "redirect", 2, 0, 'r' },
 	{ "root", 1, 0, 't' },
 	{ "daemon", 0, 0, 'd' },
 	{ NULL },
@@ -54,7 +54,7 @@ int main(int argc, char *argv[])
 		exit(EXIT_FAILURE);
 
 	while (1) {
-		val = getopt_long(argc, argv, "n:rd", tip_repo_opts, NULL);
+		val = getopt_long(argc, argv, "n:r::d", tip_repo_opts, NULL);
 		if (val < 0)
 			break;
 
@@ -67,7 +67,15 @@ int main(int argc, char *argv[])
 				}
 				break;
 			case 'r':
-				redirect = true;
+				if (optarg) {
+					max_redirect = atoi(optarg);
+					if (max_redirect <= 0) {
+						syslog(LOG_ERR, "Invalid number for redirections");
+						return EXIT_FAILURE;
+					}
+				} else {
+					max_redirect = max_clients;
+				}
 				break;
 			case 't':
 				root = strdup(optarg);