nuttx/Documentation/applications/examples/webserver/index.rst

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==============================
``webserver`` Simple Webserver
==============================
This is a port of uIP tiny webserver example application. Settings specific to
this example include:
- ``CONFIG_EXAMPLES_WEBSERVER_NOMAC`` (may be defined to use software assigned
MAC)
- ``CONFIG_EXAMPLES_WEBSERVER_IPADDR`` Target IP address.
- ``CONFIG_EXAMPLES_WEBSERVER_DRIPADDR`` Default router IP address.
- ``CONFIG_EXAMPLES_WEBSERVER_NETMASK`` Network mask.
- ``CONFIG_EXAMPLES_WEBSERVER_DHCPC`` Select to get IP address via DHCP.
If you use DHCPC, then some special configuration network options are required.
These include:
- ``CONFIG_NET=y`` of course.
- ``CONFIG_NET_UDP=y`` UDP support is required for DHCP (as well as various
other UDP-related configuration settings).
- ``CONFIG_NET_BROADCAST=y`` UDP broadcast support is needed.
- ``CONFIG_NET_ETH_PKTSIZE=650`` or larger. Per RFC2131 (p. 9), the DHCP client
must be prepared to receive DHCP messages of up to ``576`` bytes (excluding
Ethernet, IP, or UDP headers and FCS). **Note** that the actual MTU setting
will depend upon the specific link protocol. Here Ethernet is indicated.
Other configuration items apply also to the selected ``webserver`` net utility.
Additional relevant settings for the uIP ``webserver`` net utility are:
- ``CONFIG_NETUTILS_HTTPDSTACKSIZE``
- ``CONFIG_NETUTILS_HTTPDFILESTATS``
- ``CONFIG_NETUTILS_HTTPDNETSTATS``
Applications using this example will need to enable the following ``netutils``
libraries in their ``defconfig`` file: ::
CONFIG_NETUTILS_NETLIB=y
CONFIG_NETUTILS_DHCPC=y
CONFIG_NETDB_DNSCLIENT=y
CONFIG_NETUTILS_WEBSERVER=y
**Note**: This example does depend on the ``perl`` script at
``nuttx/tools/mkfsdata.pl``. You must have ``perl`` installed on your development
system at ``/usr/bin/perl``.