Unix domain: Various fixes to get apps/examplex/udgram working

net/local/local.h

@@ -502,7 +502,8 @@ int local_create_fifos(FAR struct local_conn_s *conn);
  *
  ****************************************************************************/
 
-int local_create_halfduplex(FAR struct local_conn_s *conn);
+int local_create_halfduplex(FAR struct local_conn_s *conn,
+                            FAR const char *path);
 
 /****************************************************************************
  * Name: local_destroy_fifos
@@ -582,7 +583,7 @@ int local_open_receiver(FAR struct local_conn_s *conn);
  *
  ****************************************************************************/
 
-int local_open_sender(FAR struct local_conn_s *conn, FAR char *path);
+int local_open_sender(FAR struct local_conn_s *conn, FAR const char *path);
 
 #undef EXTERN
 #ifdef __cplusplus

net/local/local_fifo.c

@@ -320,14 +320,14 @@ int local_create_fifos(FAR struct local_conn_s *conn)
  *
  ****************************************************************************/
 
-int local_create_halfduplex(FAR struct local_conn_s *conn)
+int local_create_halfduplex(FAR struct local_conn_s *conn, FAR const char *path)
 {
-  char path[LOCAL_FULLPATH_LEN];
+  char fullpath[LOCAL_FULLPATH_LEN];
 
   /* Create the half duplex FIFO if it does not already exist. */
 
-  local_hd_name(conn->lc_path, path);
+  local_hd_name(path, fullpath);
-  return local_create_fifo(path);
+  return local_create_fifo(fullpath);
 }
 
 /****************************************************************************
@@ -490,7 +490,7 @@ int local_open_receiver(FAR struct local_conn_s *conn)
  *
  ****************************************************************************/
 
-int local_open_sender(FAR struct local_conn_s *conn, FAR char *path)
+int local_open_sender(FAR struct local_conn_s *conn, FAR const char *path)
 {
   char fullpath[LOCAL_FULLPATH_LEN];
 

net/local/local_recvfrom.c

@@ -266,7 +266,7 @@ psock_dgram_recvfrom(FAR struct socket *psock, FAR void *buf, size_t len,
 
   /* Make sure that half duplex FIFO has been created */
 
-  ret = local_create_halfduplex(conn);
+  ret = local_create_halfduplex(conn, conn->lc_path);
   if (ret < 0)
     {
       ndbg("ERROR: Failed to create FIFO for %s: %d\n",

net/local/local_sendpacket.c

@@ -152,7 +152,7 @@ int local_send_packet(int fd, FAR const uint8_t *buf, size_t len)
 
       len16 = len;
       ret = local_fifo_write(fd, (FAR const uint8_t *)&len16, sizeof(uint16_t));
-      if(ret == OK)
+      if (ret == OK)
         {
           /* Send the packet data */
 

net/local/local_sendto.c

@@ -95,13 +95,17 @@ ssize_t psock_local_sendto(FAR struct socket *psock, FAR const void *buf,
 
   DEBUGASSERT(buf && len <= UINT16_MAX);
 
-  /* Verify that this is a bound, un-connected peer socket */
+  /* Verify that this is not a connected peer socket.  It need not be
+   * bound, however.  If unbound, recvfrom will see this as a nameless
+   * connection.
+   */
 
-  if (conn->lc_state != LOCAL_STATE_BOUND)
+  if (conn->lc_state != LOCAL_STATE_UNBOUND &&
+      conn->lc_state != LOCAL_STATE_BOUND)
     {
       /* Either not bound to address or it is connected */
 
-      ndbg("ERROR: Connected or not bound\n");
+      ndbg("ERROR: Connected state\n");
       return -EISCONN;
     }
 
@@ -122,7 +126,7 @@ ssize_t psock_local_sendto(FAR struct socket *psock, FAR const void *buf,
    * REVISIT:  Or should be just make sure that it already exists?
    */
 
-  ret = local_create_halfduplex(conn);
+  ret = local_create_halfduplex(conn, unaddr->sun_path);
   if (ret < 0)
     {
       ndbg("ERROR: Failed to create FIFO for %s: %d\n",
@@ -147,6 +151,12 @@ ssize_t psock_local_sendto(FAR struct socket *psock, FAR const void *buf,
     {
       ndbg("ERROR: Failed to send the packet: %d\n", ret);
     }
+  else
+    {
+      /* local_send_packet returns 0 if all 'len' bytes were sent */
+
+      nsent = len;
+    }
 
   /* Now we can close the write-only socket descriptor */
 

net/socket/sendto.c

@@ -127,7 +127,7 @@ ssize_t psock_sendto(FAR struct socket *psock, FAR const void *buf,
 {
   socklen_t minlen;
 #if defined(CONFIG_NET_UDP) || defined(CONFIG_NET_LOCAL)
-  int ret;
+  ssize_t nsent;
 #endif
   int err;
 
@@ -209,7 +209,7 @@ ssize_t psock_sendto(FAR struct socket *psock, FAR const void *buf,
   if (psock->s_domain == PF_LOCAL)
 #endif
     {
-      ret = psock_local_sendto(psock, buf, len, flags, to, tolen);
+      nsent = psock_local_sendto(psock, buf, len, flags, to, tolen);
     }
 #endif /* CONFIG_NET_LOCAL */
 
@@ -218,20 +218,20 @@ ssize_t psock_sendto(FAR struct socket *psock, FAR const void *buf,
   else
 #endif
     {
-      ret = psock_udp_sendto(psock, buf, len, flags, to, tolen);
+      nsent = psock_udp_sendto(psock, buf, len, flags, to, tolen);
     }
 #endif /* CONFIG_NET_UDP */
 
   /* Check if the domain-specific sendto() logic failed */
 
-  if (ret < 0)
+  if (nsent < 0)
     {
-      ndbg("ERROR: Domain sendto() failed: %d\n", ret);
+      ndbg("ERROR: Unix domain sendto() failed: %d\n", ret);
-      err = -ret;
+      err = -nsent;
       goto errout;
     }
 
-  return OK;
+  return nsent;
 #else
   err = ENOSYS;
 #endif /* CONFIG_NET_UDP || CONFIG_NET_LOCAL */