Verified basic client-side network functionalitynuttx-3.0

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@373 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 32 insertions, 17 deletions

diff --git a/nuttx/TODO b/nuttx/TODO
index 9a2890417..dddf2ecaa 100644
--- a/nuttx/TODO
+++ b/nuttx/TODO
@@ -29,37 +29,52 @@ o C++ Support
 - Need to call static constructors
 
 o Network
-- Finish integratin of uIP
-
-o USB
-- Implement USB device support
-- Implement USB bulk device
-
-o Libraries
-- sscanf() and lib_vsprintf() do not support floating point values.
-- The definition of environ in stdlib.h is bogus and will not work as it should.  This
-  is because the underlying representation of the environment is not an arry of pointers.
-
-o File system
-- Add chmod(), truncate().
-- FAT32: long file names
-
-o Network
 - Did not implement send() and sendto() timeouts.  Option is setable via setsockopt,
   but is not implemented.
 - netutils/webserver netutils/telnetd (and maybe others) are seriously broken.
+  Need to be re-written to use listen() and accept()
 - Should implement SOCK_RAW
+- listen() and accept() are untested.
+- accept() and recvfrom() need to return connection address
 - Performance Improvements (uIP is not very fast):
-
+- Improve performance by queing TX operations
   Add simple buffer management.  CONFIG_NET_BUFFERS
   (1) On write, queue buffer for output get a new buffer for the socket (waiting if
       nececcesary
   (2) Copy buffer structure into uip_driver_structure when driver requests write
       data
+- Improve performance by stimulating the driver to accept new TX data before the
+  next polling interval.
 
   Add a txail callback into driver to eliminate send delays.  Since we want to
   support multiple network devices, this means we will have to add some infrastructure
   to map to device.
+- Break uip_interrupt() (in uip.c) into several functions.
+- uIP polling issues:
+  (1) uIP expects a single driver to poll at a 500ms interval (dm90x0 currently
+      polls a 5sec).
+  (2) Current logic will not support multiple ethernet drivers.  Each driver should
+      poll on TCP connections connect on the network supported by the driver; UDP
+      polling should respond with TX data only if the UDP packet is intended for the
+      the network supported by the driver.
+  (3) If there were multiple drivers, polling would occur at double the rate.
+- TCP Bug:
+  When TCP data is received with no read in place, it appears that uIP ACKs the data
+  even though it was not taken accepted.  We must either (1) buffer incoming data, or
+  (2) not ACK it so that it will be re-sent.
+
+o USB
+- Implement USB device support
+- Implement USB bulk device
+
+o Libraries
+- sscanf() and lib_vsprintf() do not support floating point values.
+- The definition of environ in stdlib.h is bogus and will not work as it should.  This
+  is because the underlying representation of the environment is not an arry of pointers.
+
+o File system
+- Add chmod(), truncate().
+- FAT32: long file names
 
 o Documentation
 - Document fs/ & driver/ logic