From 6384dde85bb0729137c4de3c1c994edc5d7c8091 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 4 Jan 2013 01:15:08 +0100
Subject: [PATCH] fix resuming accept() calls after exceeding client limit

---
 client.c |  5 +++--
 listen.c | 11 +++++++++--
 uhttpd.h |  2 +-
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/client.c b/client.c
index 7920102..dd3f912 100644
--- a/client.c
+++ b/client.c
@@ -438,7 +438,7 @@ static void set_addr(struct uh_addr *addr, void *src)
 	}
 }
 
-void uh_accept_client(int fd)
+bool uh_accept_client(int fd)
 {
 	static struct client *next_client;
 	struct client *cl;
@@ -455,7 +455,7 @@ void uh_accept_client(int fd)
 	sl = sizeof(addr);
 	sfd = accept(fd, (struct sockaddr *) &addr, &sl);
 	if (sfd < 0)
-		return;
+		return false;
 
 	set_addr(&cl->peer_addr, &addr);
 	sl = sizeof(addr);
@@ -476,6 +476,7 @@ void uh_accept_client(int fd)
 	next_client = NULL;
 	n_clients++;
 	cl->id = client_id++;
+	return true;
 }
 
 void uh_close_fds(void)
diff --git a/listen.c b/listen.c
index c4b6b2b..f11768a 100644
--- a/listen.c
+++ b/listen.c
@@ -56,7 +56,7 @@ void uh_unblock_listeners(void)
 {
 	struct listener *l;
 
-	if (!n_blocked && conf.max_requests &&
+	if ((!n_blocked && conf.max_requests) ||
 	    n_clients >= conf.max_requests)
 		return;
 
@@ -64,6 +64,10 @@ void uh_unblock_listeners(void)
 		if (!l->blocked)
 			continue;
 
+		l->fd.cb(&l->fd, ULOOP_READ);
+	    if (n_clients >= conf.max_requests)
+			break;
+
 		n_blocked--;
 		l->blocked = false;
 		uloop_fd_add(&l->fd, ULOOP_READ);
@@ -74,7 +78,10 @@ static void listener_cb(struct uloop_fd *fd, unsigned int events)
 {
 	struct listener *l = container_of(fd, struct listener, fd);
 
-	uh_accept_client(fd->fd);
+	while (1) {
+		if (!uh_accept_client(fd->fd))
+			break;
+	}
 
 	if (conf.max_requests && n_clients >= conf.max_requests)
 		uh_block_listener(l);
diff --git a/uhttpd.h b/uhttpd.h
index a9777e8..d67e48c 100644
--- a/uhttpd.h
+++ b/uhttpd.h
@@ -192,7 +192,7 @@ extern struct dispatch_handler cgi_dispatch;
 
 void uh_index_add(const char *filename);
 
-void uh_accept_client(int fd);
+bool uh_accept_client(int fd);
 
 void uh_unblock_listeners(void);
 void uh_setup_listeners(void);
-- 
2.25.1