uhttpd: protect tcp receive operations with select, make tcp keep-alive optional (#8272)

SVN-Revision: 24952

package/uhttpd/files/uhttpd.config

@@ -51,6 +51,13 @@ config uhttpd main
 	# request process.
 	option network_timeout	30
 
+	# TCP Keep-Alive, send periodic keep-alive probes
+	# over established connections to detect dead peers.
+	# The value is given in seconds to specify the
+	# interval between subsequent probes.
+	# Setting this to 0 will disable TCP keep-alive.
+	option tcp_keepalive	1
+
 	# Basic auth realm, defaults to local hostname
 #	option realm	OpenWrt
 

package/uhttpd/files/uhttpd.init

@@ -66,6 +66,7 @@ start_instance()
 	append_arg "$cfg" lua_handler "-L"
 	append_arg "$cfg" script_timeout "-t"
 	append_arg "$cfg" network_timeout "-T"
+	append_arg "$cfg" tcp_keepalive "-A"
 	append_arg "$cfg" error_page "-E"
 	append_arg "$cfg" index_page "-I"