Replace confusing references to uIP with just 'the network'

net/socket/net_close.c

@@ -136,10 +136,10 @@ static inline int close_timeout(FAR struct tcp_close_s *pstate)
  * Function: netclose_interrupt
  *
  * Description:
- *   Handle uIP callback events.
+ *   Handle network callback events.
  *
  * Parameters:
- *   conn - uIP TCP connection structure
+ *   conn - TCP connection structure
  *
  * Returned Value:
  *   None
@@ -320,7 +320,7 @@ static inline void netclose_txnotify(FAR struct socket *psock,
  *   Break any current TCP connection
  *
  * Parameters:
- *   conn - uIP TCP connection structure
+ *   conn - TCP connection structure
  *
  * Returned Value:
  *   None
@@ -428,7 +428,7 @@ static inline int netclose_disconnect(FAR struct socket *psock)
           /* Free the connection */
 
           conn->crefs = 0;          /* No more references on the connection */
-          tcp_free(conn);           /* Free uIP resources */
+          tcp_free(conn);           /* Free network resources */
 
           /* Get the result of the close */
 
@@ -517,7 +517,7 @@ int psock_close(FAR struct socket *psock)
       goto errout;
     }
 
-  /* We perform the uIP close operation only if this is the last count on
+  /* We perform the close operation only if this is the last count on
    * the socket. (actually, I think the socket crefs only takes the values
    * 0 and 1 right now).
    *
@@ -527,7 +527,7 @@ int psock_close(FAR struct socket *psock)
 
   if (psock->s_crefs <= 1 && psock->s_conn != NULL)
     {
-      /* Perform uIP side of the close depending on the protocol type */
+      /* Perform local side of the close depending on the protocol type */
 
       switch (psock->s_type)
         {
@@ -649,7 +649,7 @@ int psock_close(FAR struct socket *psock)
                   /* Yes... free the connection structure */
 
                   conn->crefs = 0;          /* No more references on the connection */
-                  pkt_free(psock->s_conn);  /* Free uIP resources */
+                  pkt_free(psock->s_conn);  /* Free network resources */
                 }
               else
                 {

net/socket/net_sendfile.c

@@ -402,7 +402,7 @@ static uint16_t sendfile_interrupt(FAR struct net_driver_s *dev, FAR void *pvcon
 
           dev->d_sndlen = sndlen;
 
-          /* Set the sequence number for this packet.  NOTE:  uIP updates
+          /* Set the sequence number for this packet.  NOTE:  The network updates
            * sndseq on recept of ACK *before* this function is called.  In that
            * case sndseq will point to the next unacknowledge byte (which might
            * have already been sent).  We will overwrite the value of sndseq

net/socket/recvfrom.c

@@ -1692,8 +1692,8 @@ static ssize_t tcp_recvfrom(FAR struct socket *psock, FAR void *buf, size_t len,
         }
     }
 
-  /* In general, this uIP-based implementation will not support non-blocking
-   * socket operations... except in a few cases:  Here for TCP receive with read-ahead
+  /* In general, this implementation will not support non-blocking socket
+   * operations... except in a few cases:  Here for TCP receive with read-ahead
    * enabled.  If this socket is configured as non-blocking then return EAGAIN
    * if no data was obtained from the read-ahead buffers.
    */