DHCP-related documentation updates/warning fixes

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2824 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 15 insertions, 0 deletions

diff --git a/nuttx/netutils/README b/nuttx/netutils/README
index a28270715..e4b05eb21 100644
--- a/nuttx/netutils/README
+++ b/nuttx/netutils/README
@@ -13,6 +13,9 @@ include:
   webclient - HTTP web client
   webserver - HTTP web server
 
+You may find additional information on these apps in the uIP forum
+accessible through: http://www.sics.se/~adam/uip/index.php/Main_Page 
+
 Additional applications that were not part of uIP (but which are
 highly influenced by uIP) include:
 
@@ -21,4 +24,16 @@ highly influenced by uIP) include:
   thttpd    - This is a port of Jef Poskanzer's THTTPD HTPPD server.
               See http://acme.com/software/thttpd/.
 
+If you use DHCPC/D, then some special configuration network options are
+required.  These include:
 
+  CONFIG_NET=y               Of course
+  CONFIG_NSOCKET_DESCRIPTORS And, of course, you must allocate some
+                             socket descriptors.
+  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_BUFSIZE=650     The client must be prepared to receive
+  (or larger)                DHCP messages of up to 576 bytes (excluding
+                             Ethernet, IP, or UDP headers and FCS).