Add a simple test of the Unix domain sockets

10 files changed, 683 insertions, 2 deletions

diff --git a/apps/examples/Kconfig b/apps/examples/Kconfig
index 6714e6351..329077071 100644
--- a/apps/examples/Kconfig
+++ b/apps/examples/Kconfig
@@ -75,6 +75,7 @@ source "$APPSDIR/examples/discover/Kconfig"
 source "$APPSDIR/examples/webserver/Kconfig"
 source "$APPSDIR/examples/usbserial/Kconfig"
 source "$APPSDIR/examples/usbterm/Kconfig"
+source "$APPSDIR/examples/ustream/Kconfig"
 source "$APPSDIR/examples/watchdog/Kconfig"
 source "$APPSDIR/examples/wget/Kconfig"
 source "$APPSDIR/examples/wgetjson/Kconfig"
diff --git a/apps/examples/Make.defs b/apps/examples/Make.defs
index 2c23a68e6..520ba8cc0 100644
--- a/apps/examples/Make.defs
+++ b/apps/examples/Make.defs
@@ -318,6 +318,10 @@ ifeq ($(CONFIG_EXAMPLES_USBTERM),y)
 CONFIGURED_APPS += examples/usbterm
 endif
 
+ifeq ($(CONFIG_EXAMPLES_USTREAM),y)
+CONFIGURED_APPS += examples/ustream
+endif
+
 ifeq ($(CONFIG_EXAMPLES_WATCHDOG),y)
 CONFIGURED_APPS += examples/watchdog
 endif
diff --git a/apps/examples/Makefile b/apps/examples/Makefile
index 8d39c1a5f..ddcea687c 100644
--- a/apps/examples/Makefile
+++ b/apps/examples/Makefile
@@ -45,7 +45,7 @@ SUBDIRS += nxffs nxflat nxhello nximage nxlines nxtext ostest pashello pipe
 SUBDIRS += poll posix_spawn pwm qencoder random relays rgmp romfs sendmail
 SUBDIRS += serialblaster serloop serialrx slcd smart smart_test tcpecho
 SUBDIRS += telnetd thttpd tiff timer touchscreen udp usbserial usbterm
-SUBDIRS += watchdog webserver wget wgetjson xmlrpc
+SUBDIRS += ustream watchdog webserver wget wgetjson xmlrpc
 
 # Sub-directories that might need context setup.  Directories may need
 # context setup for a variety of reasons, but the most common is because
@@ -59,7 +59,7 @@ CNTXTDIRS += djoystick flash_test ftpd hello helloxx i2schar json keypadtest
 CNTXTDIRS += ltdc modbus lcdrw mtdpart mtdrwb netpkt nettest nx nxhello
 CNTXTDIRS += nximage nxlines nxtext nrf24l01_term ostest random relays
 CNTXTDIRS += qencoder serialblasters lcd serialrx smart_test tcpecho telnetd
-CNTXTDIRS += tiff timer touchscreen usbterm watchdog wgetjson
+CNTXTDIRS += tiff timer touchscreen usbterm ustream watchdog wgetjson
 endif
 
 all: nothing
diff --git a/apps/examples/README.txt b/apps/examples/README.txt
index 13586419b..c9436df91 100644
--- a/apps/examples/README.txt
+++ b/apps/examples/README.txt
@@ -1976,6 +1976,20 @@ examples/usbterm
   Prolifics emulation (not defined) and the CDC serial implementation
   (when defined). CONFIG_USBDEV_TRACE_INITIALIDSET.
 
+examples/ustream
+^^^^^^^^^^^^^^^^
+
+  This is the same test as examples/nettest, but using Unix domain
+  sockets.
+
+  Dependencies:
+    CONFIG_NET_LOCAL - Depends on support for Unix domain sockets
+
+  Configuration:
+    CONFIG_EXAMPLES_USTREAM - Enables the Unix domain socket example.
+    CONFIG_EXAMPLES_USTREAM_ADDR - Specifics the Unix domain address.
+      Default "/var/fifo/fifo".
+
 examples/watchdog
 ^^^^^^^^^^^^^^^^^
 
diff --git a/apps/examples/ustream/.gitignore b/apps/examples/ustream/.gitignore
new file mode 100644
index 000000000..52ae9aa90
--- /dev/null
+++ b/apps/examples/ustream/.gitignore
@@ -0,0 +1,14 @@
+/Make.dep
+/.depend
+/.built
+/*.asm
+/*.obj
+/*.rel
+/*.lst
+/*.sym
+/*.adb
+/*.lib
+/*.src
+/*.hobj
+/*.exe
+/*.dSYM
diff --git a/apps/examples/ustream/Kconfig b/apps/examples/ustream/Kconfig
new file mode 100644
index 000000000..5731a7c5a
--- /dev/null
+++ b/apps/examples/ustream/Kconfig
@@ -0,0 +1,19 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+config EXAMPLES_USTREAM
+	bool "Unix domain socket example"
+	default n
+	depends on NET_LOCAL
+	---help---
+		Enable the Unix domain SOCK_STREAM test example
+
+if EXAMPLES_USTREAM
+
+config EXAMPLES_USTREAM_ADDR
+	string "Unix domain address"
+	default "/var/fifo/fifo"
+
+endif # EXAMPLES_USTREAM
diff --git a/apps/examples/ustream/Makefile b/apps/examples/ustream/Makefile
new file mode 100644
index 000000000..1b399860c
--- /dev/null
+++ b/apps/examples/ustream/Makefile
@@ -0,0 +1,173 @@
+############################################################################
+# examples/ustream/Makefile
+#
+#   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+-include $(TOPDIR)/.config
+-include $(TOPDIR)/Make.defs
+include $(APPDIR)/Make.defs
+
+# Basic Unix domain networking test
+
+SERVER_ASRCS =
+SERVER_AOBJS = $(SERVER_ASRCS:.S=$(OBJEXT))
+
+SERVER_CSRCS = 
+SERVER_COBJS = $(SERVER_CSRCS:.c=$(OBJEXT))
+
+SERVER_MAINSRC = ustream_server.c
+SERVER_MAINOBJ = $(SERVER_MAINSRC:.c=$(OBJEXT))
+
+SERVER_SRCS = $(SERVER_ASRCS) $(SERVER_CSRCS) $(SERVER_MAINSRC)
+SERVER_OBJS = $(SERVER_AOBJS) $(SERVER_COBJS)
+
+SERVER_PROGNAME = server$(EXEEXT)
+
+SERVER_APPNAME = server
+SERVER_PRIORITY = SCHED_PRIORITY_DEFAULT
+SERVER_STACKSIZE = 2048
+
+CLIENT_ASRCS =
+CLIENT_AOBJS = $(CLIENT_ASRCS:.S=$(OBJEXT))
+
+CLIENT_CSRCS = 
+CLIENT_COBJS = $(CLIENT_CSRCS:.c=$(OBJEXT))
+
+CLIENT_MAINSRC = ustream_client.c
+CLIENT_MAINOBJ = $(CLIENT_MAINSRC:.c=$(OBJEXT))
+
+CLIENT_SRCS = $(CLIENT_ASRCS) $(CLIENT_CSRCS) $(CLIENT_MAINSRC)
+CLIENT_OBJS = $(CLIENT_AOBJS) $(CLIENT_COBJS)
+
+CLIENT_PROGNAME = server$(EXEEXT)
+
+CLIENT_APPNAME = client
+CLIENT_PRIORITY = SCHED_PRIORITY_DEFAULT
+CLIENT_STACKSIZE = 2048
+
+AOBJS = $(CLIENT_AOBJS) $(SERVER_AOBJS)
+COBJS = $(CLIENT_COBJS) $(CLIENT_MAINOBJ) $(SERVER_COBJS) $(SERVER_MAINOBJ)
+
+SRCS = $(CLIENT_SRCS) $(SERVER_SRCS)
+OBJS = $(AOBJS) $(COBJS)
+
+ifneq ($(CONFIG_BUILD_KERNEL),y)
+  SERVER_OBJS += $(SERVER_MAINOBJ)
+  CLIENT_OBJS += $(CLIENT_MAINOBJ)
+endif
+
+ifeq ($(CONFIG_WINDOWS_NATIVE),y)
+  USTREAM_BIN = ..\..\libapps$(LIBEXT)
+else
+ifeq ($(WINTOOL),y)
+  USTREAM_BIN = ..\\..\\libapps$(LIBEXT)
+else
+  USTREAM_BIN = ../../libapps$(LIBEXT)
+endif
+endif
+
+ifeq ($(WINTOOL),y)
+  INSTALL_DIR = "${shell cygpath -w $(BIN_DIR)}"
+else
+  INSTALL_DIR = $(BIN_DIR)
+endif
+
+# Common build
+
+VPATH =
+
+all: .built
+.PHONY: clean depend distclean
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+.built: $(OBJS)
+	$(call ARCHIVE, $(USTREAM_BIN), $(SERVER_OBJS))
+	$(Q) touch .built
+
+ifeq ($(CONFIG_BUILD_KERNEL),y)
+
+$(BIN_DIR)$(DELIM)$(CLIENT_PROGNAME): $(CLIENT_OBJS)
+	@echo "LD: $(CLIENT_PROGNAME)"
+	$(Q) $(LD) $(LDELFFLAGS) $(LDLIBPATH) -o $(INSTALL_DIR)$(DELIM)$(CLIENT_PROGNAME) $(ARCHCRT0OBJ) $(CLIENT_MAINOBJ) $(LDLIBS)
+	$(Q) $(NM) -u  $(INSTALL_DIR)$(DELIM)$(CLIENT_PROGNAME)
+
+$(BIN_DIR)$(DELIM)$(SERVER_PROGNAME): $(OBJS) $(SERVER_MAINOBJ)
+	@echo "LD: $(SERVER_PROGNAME)"
+	$(Q) $(LD) $(LDELFFLAGS) $(LDLIBPATH) -o $(INSTALL_DIR)$(DELIM)$(SERVER_PROGNAME) $(ARCHCRT0OBJ) $(SERVER_MAINOBJ) $(LDLIBS)
+	$(Q) $(NM) -u  $(INSTALL_DIR)$(DELIM)$(SERVER_PROGNAME)
+
+install: $(BIN_DIR)$(DELIM)$(CLIENT_PROGNAME) $(BIN_DIR)$(DELIM)$(SERVER_PROGNAME)
+
+else
+install:
+
+endif
+
+ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
+
+$(BUILTIN_REGISTRY)$(DELIM)$(CLIENT_APPNAME)_main.bdat: $(DEPCONFIG) Makefile
+	$(call REGISTER,$(CLIENT_APPNAME),$(CLIENT_PRIORITY),$(CLIENT_STACKSIZE),$(CLIENT_APPNAME)_main)
+
+$(BUILTIN_REGISTRY)$(DELIM)$(SERVER_APPNAME)_main.bdat: $(DEPCONFIG) Makefile
+	$(call REGISTER,$(SERVER_APPNAME),$(SERVER_PRIORITY),$(SERVER_STACKSIZE),$(SERVER_APPNAME)_main)
+
+context: $(BUILTIN_REGISTRY)$(DELIM)$(CLIENT_APPNAME)_main.bdat $(BUILTIN_REGISTRY)$(DELIM)$(SERVER_APPNAME)_main.bdat
+
+else
+
+context:
+
+endif
+
+.depend: Makefile $(SERVER_SRCS)
+	@$(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(SERVER_SRCS) >Make.dep
+	@touch $@
+
+depend: .depend
+
+clean:
+	$(call DELFILE, .built)
+	$(call DELFILE, *.dSYM)
+	$(call CLEAN)
+
+distclean: clean
+	$(call DELFILE, Make.dep)
+	$(call DELFILE, .depend)
+
+-include Make.dep
+
diff --git a/apps/examples/ustream/ustream.h b/apps/examples/ustream/ustream.h
new file mode 100644
index 000000000..2d4533c05
--- /dev/null
+++ b/apps/examples/ustream/ustream.h
@@ -0,0 +1,53 @@
+/****************************************************************************
+ * examples/ustream/ustream.h
+ *
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_EXAMPLES_USTREAM_H
+#define __APPS_EXAMPLES_USTREAM_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define SENDSIZE   4096
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#endif /* __APPS_EXAMPLES_USTREAM_H */
diff --git a/apps/examples/ustream/ustream_client.c b/apps/examples/ustream/ustream_client.c
new file mode 100644
index 000000000..797a5a18c
--- /dev/null
+++ b/apps/examples/ustream/ustream_client.c
@@ -0,0 +1,191 @@
+/****************************************************************************
+ * examples/ustream/ustream_client.c
+ *
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include "ustream.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#ifdef CONFIG_BUILD_KERNEL
+int main(int argc, FAR char *argv[])
+#else
+int client_main(int argc, char *argv[])
+#endif
+{
+  struct sockaddr_un myaddr;
+  socklen_t addrlen;
+  FAR char *outbuf;
+  FAR char *inbuf;
+  int sockfd;
+  int nbytessent;
+  int nbytesrecvd;
+  int totalbytesrecvd;
+  int ch;
+  int ret;
+  int i;
+
+  /* Allocate buffers */
+
+  outbuf = (char*)malloc(SENDSIZE);
+  inbuf  = (char*)malloc(SENDSIZE);
+  if (!outbuf || !inbuf)
+    {
+      printf("client: failed to allocate buffers\n");
+      exit(1);
+    }
+
+  /* Create a new Unix domain socket */
+
+  sockfd = socket(PF_LOCAL, SOCK_STREAM, 0);
+  if (sockfd < 0)
+    {
+      printf("client socket failure %d\n", errno);
+      goto errout_with_buffers;
+    }
+
+  /* Connect the socket to the server */
+
+  addrlen = strlen(CONFIG_EXAMPLES_USTREAM_ADDR);
+  if (addrlen > UNIX_PATH_MAX - 1)
+    {
+      addrlen = UNIX_PATH_MAX - 1;
+    }
+
+  myaddr.sun_family = AF_LOCAL;
+  strncpy(myaddr.sun_path, CONFIG_EXAMPLES_USTREAM_ADDR, addrlen);
+  myaddr.sun_path[addrlen] = '\0';
+
+  printf("client: Connecting...\n");
+  addrlen += sizeof(sa_family_t) + 1;
+  ret = connect( sockfd, (struct sockaddr *)&myaddr, addrlen);
+  if (ret < 0)
+    {
+      printf("client: connect failure: %d\n", errno);
+      goto errout_with_socket;
+    }
+
+  printf("client: Connected\n");
+
+  /* Initialize the buffer */
+
+  ch = 0x20;
+  for (i = 0; i < SENDSIZE; i++ )
+    {
+      outbuf[i] = ch;
+      if (++ch > 0x7e)
+        {
+          ch = 0x20;
+        }
+    }
+
+  /* Then send and receive one message */
+
+  printf("client: Sending %d bytes\n", SENDSIZE);
+  nbytessent = send(sockfd, outbuf, SENDSIZE, 0);
+  printf("client: Sent %d bytes\n", nbytessent);
+
+  if (nbytessent < 0)
+    {
+      printf("client: send failed: %d\n", errno);
+      goto errout_with_socket;
+    }
+  else if (nbytessent != SENDSIZE)
+    {
+      printf("client: Bad send length: %d Expected: %d\n", nbytessent, SENDSIZE);
+      goto errout_with_socket;
+    }
+
+  totalbytesrecvd = 0;
+  do
+    {
+      printf("client: Receiving...\n");
+      nbytesrecvd = recv(sockfd, &inbuf[totalbytesrecvd], SENDSIZE - totalbytesrecvd, 0);
+
+      if (nbytesrecvd < 0)
+        {
+          printf("client: recv failed: %d\n", errno);
+          goto errout_with_socket;
+        }
+      else if (nbytesrecvd == 0)
+        {
+          printf("client: The server closed the connection\n");
+          goto errout_with_socket;
+        }
+
+      totalbytesrecvd += nbytesrecvd;
+      printf("client: Received %d of %d bytes\n", totalbytesrecvd, SENDSIZE);
+    }
+  while (totalbytesrecvd < SENDSIZE);
+
+  if (totalbytesrecvd != SENDSIZE)
+    {
+      printf("client: Bad recv length: %d Expected: %d\n", totalbytesrecvd, SENDSIZE);
+      goto errout_with_socket;
+    }
+  else if (memcmp(inbuf, outbuf, SENDSIZE) != 0)
+    {
+      printf("client: Received buffer does not match sent buffer\n");
+      goto errout_with_socket;
+    }
+
+  close(sockfd);
+  free(outbuf);
+  free(inbuf);
+  return 0;
+
+errout_with_socket:
+  close(sockfd);
+
+errout_with_buffers:
+  free(outbuf);
+  free(inbuf);
+  return 1;
+}
diff --git a/apps/examples/ustream/ustream_server.c b/apps/examples/ustream/ustream_server.c
new file mode 100644
index 000000000..4432019a4
--- /dev/null
+++ b/apps/examples/ustream/ustream_server.c
@@ -0,0 +1,212 @@
+/****************************************************************************
+ * examples/ustream/ustream_server.c
+ *
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "ustream.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#ifdef CONFIG_BUILD_KERNEL
+int main(int argc, FAR char *argv[])
+#else
+int server_main(int argc, char *argv[])
+#endif
+{
+  struct sockaddr_un myaddr;
+  socklen_t addrlen;
+  FAR char *buffer;
+  int listensd;
+  int acceptsd;
+  int nbytesread;
+  int totalbytesread;
+  int nbytessent;
+  int ch;
+  int ret;
+  int i;
+
+  /* Allocate a BIG buffer */
+
+  buffer = (char*)malloc(2*SENDSIZE);
+  if (!buffer)
+    {
+      printf("server: failed to allocate buffer\n");
+      exit(1);
+    }
+
+  /* Create a new Unix domain socket */
+
+  listensd = socket(PF_LOCAL, SOCK_STREAM, 0);
+  if (listensd < 0)
+    {
+      printf("server: socket failure: %d\n", errno);
+      goto errout_with_buffer;
+    }
+
+  /* Bind the socket to a local address */
+
+  addrlen = strlen(CONFIG_EXAMPLES_USTREAM_ADDR);
+  if (addrlen > UNIX_PATH_MAX - 1)
+    {
+      addrlen = UNIX_PATH_MAX - 1;
+    }
+
+  myaddr.sun_family = AF_LOCAL;
+  strncpy(myaddr.sun_path, CONFIG_EXAMPLES_USTREAM_ADDR, addrlen);
+  myaddr.sun_path[addrlen] = '\0';
+
+  addrlen += sizeof(sa_family_t) + 1;
+  ret = bind(listensd, (struct sockaddr*)&myaddr, addrlen);
+  if (ret < 0)
+    {
+      printf("server: bind failure: %d\n", errno);
+      goto errout_with_listensd;
+    }
+
+  /* Listen for connections on the bound socket */
+
+  if (listen(listensd, 5) < 0)
+    {
+      printf("server: listen failure %d\n", errno);
+      goto errout_with_listensd;
+    }
+
+  /* Accept only one connection */
+
+  printf("server: Accepting connections on %s\n", CONFIG_EXAMPLES_USTREAM_ADDR);
+  acceptsd = accept(listensd, (struct sockaddr*)&myaddr, &addrlen);
+  if (acceptsd < 0)
+    {
+      printf("server: accept failure: %d\n", errno);
+      goto errout_with_listensd;
+    }
+
+  printf("server: Connection accepted -- receiving\n");
+
+  /* Receive canned message */
+
+  totalbytesread = 0;
+  while (totalbytesread < SENDSIZE)
+    {
+      printf("server: Reading...\n");
+      nbytesread = recv(acceptsd, &buffer[totalbytesread], 2*SENDSIZE - totalbytesread, 0);
+      if (nbytesread < 0)
+        {
+          printf("server: recv failed: %d\n", errno);
+          goto errout_with_acceptsd;
+        }
+      else if (nbytesread == 0)
+        {
+          printf("server: The client broke the connection\n");
+          goto errout_with_acceptsd;
+        }
+
+      totalbytesread += nbytesread;
+      printf("server: Received %d of %d bytes\n", totalbytesread, SENDSIZE);
+    }
+
+  /* Verify the message */
+
+  if (totalbytesread != SENDSIZE)
+    {
+      printf("server: Received %d / Expected %d bytes\n", totalbytesread, SENDSIZE);
+      goto errout_with_acceptsd;
+    }
+
+  ch = 0x20;
+  for (i = 0; i < SENDSIZE; i++ )
+    {
+      if (buffer[i] != ch)
+        {
+          printf("server: Byte %d is %02x / Expected %02x\n", i, buffer[i], ch);
+          goto errout_with_acceptsd;
+        }
+
+      if (++ch > 0x7e)
+        {
+          ch = 0x20;
+        }
+    }
+
+  /* Then send the same data back to the client */
+
+  printf("server: Sending %d bytes\n", totalbytesread);
+  nbytessent = send(acceptsd, buffer, totalbytesread, 0);
+  if (nbytessent <= 0)
+    {
+      printf("server: send failed: %d\n", errno);
+      goto errout_with_acceptsd;
+    }
+
+  printf("server: Sent %d bytes\n", nbytessent);
+
+  /* If this platform only does abortive disconnects, then wait a bit to get the
+   * client side a change to receive the data.
+   */
+
+  printf("server: Wait before closing\n");
+  sleep(60);
+
+  close(listensd);
+  close(acceptsd);
+  free(buffer);
+  return 0;
+
+errout_with_acceptsd:
+  close(acceptsd);
+
+errout_with_listensd:
+  close(listensd);
+
+errout_with_buffer:
+  free(buffer);
+  return 1;
+}