Fix leak in socket close

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@394 42af7a65-404d-4744-a932-0658087f49c3

ChangeLog

@@ -233,4 +233,5 @@
 	* Add strcat() and strncat()
 	* Integrated uIP micro webserver
 	* Corrected a serious bug in TCP queue management
+	* Fix leak in socket close logic
 

Documentation/NuttX.html

@@ -358,14 +358,24 @@ is available that be used to build a NuttX-compatible arm-elf toolchain.</blockq
   53272     428    3568   57268    dfb4 nuttx
 </pre>
 <p><b>DM320 (ARM9)</b>
-  This build for the ARM9 target includes a signficant subset of OS
+  This build for the ARM9 target includes a significant subset of OS
-  features, ethernet driver and full TCP/IP, UDP and (minimal) ICMP
+  features, a filesystem, Ethernet driver, full TCP/IP, UDP and (minimal)
-  stacks (via uIP). (11/8/07)
+  ICMP stacks (via uIP) and a small network test application: (11/8/07,
+  configuration netconfig, examples/nettest)
 </p>
 <pre>
    text    data     bss     dec     hex filename
   49472     296    3972   53740    d1ec nuttx
 </pre>
+<p>
+  Another build for the ARM9 target includes a minimal OS feature
+  set, Ethernet driver, full TCP/IP and (minimal) ICMP stacks, and
+  a small webserver: (11/20/07, configuration uipconfig, examples/uip)
+</p>
+<pre>
+   text    data     bss     dec     hex filename
+  52040      72    4148   56260    dbc4 nuttx
+</pre>
 <p><b>87C52</b>
   A reduced functionality OS test for the 8052 target requires only
   about 18-19Kb:
@@ -694,6 +704,7 @@ Other memory:
 	* Add strcat() and strncat()
 	* Integrated uIP micro webserver
 	* Corrected a serious bug in TCP queue management
+	* Fix leak in socket close logic
 </pre></ul>
 
 <table width ="100%">

TODO

@@ -31,8 +31,9 @@ o C++ Support
 o Network
 - Did not implement send() and sendto() timeouts.  Option is setable via setsockopt,
   but is not implemented.
-- netutils/telnetd (and maybe others) are seriously broken.
+- uIP's netutils/telnetd (and maybe others) are seriously broken.
   Need to be re-written to use listen() and accept()
+- uIP's netutils/webserver does not work reliably
 - Should implement SOCK_RAW
 - accept() and recvfrom() need to return connection address
 - Performance Improvements (uIP is not very fast):

net/net-close.c

@@ -79,12 +79,16 @@ int net_close(int sockfd)
       goto errout;
     }
 
-  /* Perform the close depending on the protocol type */
+  /* Perform uIP side of the close depending on the protocol type */
 
   switch (psock->s_type)
     {
       case SOCK_STREAM:
-        uip_tcpfree(psock->s_conn);
+        {
+          struct uip_conn *conn = psock->s_conn;
+          uip_unlisten(conn);
+          uip_tcpfree(conn);
+        }
         break;
 
 #ifdef CONFIG_NET_UDP
@@ -97,11 +101,9 @@ int net_close(int sockfd)
         goto errout;
     }
 
-  /* Save the protocol type */
+  /* Then release the socket structure containing the connection */
-
-  psock->s_type = 0;
-  psock->s_conn = NULL;
 
+  sockfd_release(sockfd);
   return OK;
 
 errout:

net/net-sockets.c

@@ -45,6 +45,7 @@
 #include <assert.h>
 #include <sched.h>
 #include <errno.h>
+#include <debug.h>
 
 #include <net/uip/uip.h>
 #include <nuttx/net.h>