Minor fixes after initial tests with apps/examples/udgram

6 files changed, 1079 insertions, 19 deletions

diff --git a/apps/examples/udgram/udgram_server.c b/apps/examples/udgram/udgram_server.c
index 8b21b7c43..f09904881 100644
--- a/apps/examples/udgram/udgram_server.c
+++ b/apps/examples/udgram/udgram_server.c
@@ -95,7 +95,6 @@ int server_main(int argc, char *argv[])
   socklen_t recvlen;
   int sockfd;
   int nbytes;
-  int optval;
   int offset;
 
   /* Create a new UDP socket */
@@ -107,15 +106,6 @@ int server_main(int argc, char *argv[])
       return 1;
     }
 
-  /* Set socket to reuse address */
-
-  optval = 1;
-  if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int)) < 0)
-    {
-      printf("server: setsockopt SO_REUSEADDR failure: %d\n", errno);
-      return 1;
-    }
-
   /* Bind the socket to a local address */
 
   addrlen = strlen(CONFIG_EXAMPLES_UDGRAM_ADDR);
@@ -145,6 +135,13 @@ int server_main(int argc, char *argv[])
       nbytes = recvfrom(sockfd, inbuf, 1024, 0,
                         (struct sockaddr*)&client, &recvlen);
 
+      if (nbytes < 0)
+        {
+          printf("server: %d. recv failed: %d\n", offset, errno);
+          close(sockfd);
+          return 1;
+        }
+
       if (recvlen < sizeof(sa_family_t) || recvlen > sizeof(struct sockaddr_un))
         {
           printf("server: %d. ERROR Received %d bytes from client with invalid length %d\n",
@@ -179,13 +176,6 @@ int server_main(int argc, char *argv[])
             }
         }
 
-      if (nbytes < 0)
-        {
-          printf("server: %d. recv failed: %d\n", offset, errno);
-          close(sockfd);
-          return 1;
-        }
-
       if (nbytes != SENDSIZE)
         {
           printf("server: %d. recv size incorrect: %d vs %d\n",
diff --git a/nuttx/configs/sim/README.txt b/nuttx/configs/sim/README.txt
index 9c30e1d8e..a6d6f548a 100644
--- a/nuttx/configs/sim/README.txt
+++ b/nuttx/configs/sim/README.txt
@@ -682,13 +682,27 @@ traveler
        cd /usr/lib/
        sudo ln -s libXext.so.6.4.0 libXext.so
 
+udgram
+
+  This is the same as the nsh configuration except that it includes
+  two addition build in applications:  server and client.  These
+  applications are provided by the test at apps/examples/udgram.
+  This configuration enables local, Unix domain sockets and supports
+  the test of the datagram sockets.
+
+  To use the test:
+
+    nsh> mount -t binfs /bin
+    nsh> server &
+    nsh> client
+
 ustream
 
   This is the same as the nsh configuration except that it includes
   two addition build in applications:  server and client.  These
   applications are provided by the test at apps/examples/ustream.
   This configuration enables local, Unix domain sockets and supports
-  the test of those sockets.
+  the test of the stream sockets.
 
   To use the test:
 
diff --git a/nuttx/configs/sim/udgram/Make.defs b/nuttx/configs/sim/udgram/Make.defs
new file mode 100644
index 000000000..0b176d59f
--- /dev/null
+++ b/nuttx/configs/sim/udgram/Make.defs
@@ -0,0 +1,127 @@
+############################################################################
+# configs/sim/udgram/Make.defs
+#
+#   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}/tools/Config.mk
+
+HOSTOS			= ${shell uname -o 2>/dev/null || echo "Other"}
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION	= -g
+endif
+
+ifneq ($(CONFIG_DEBUG_NOOPT),y)
+  ARCHOPTIMIZATION	+= -O2
+endif
+
+ARCHCPUFLAGS		= -fno-builtin
+ARCHCPUFLAGSXX		= -fno-builtin -fno-exceptions -fno-rtti
+ARCHPICFLAGS		= -fpic
+ARCHWARNINGS		= -Wall -Wstrict-prototypes -Wshadow
+ARCHWARNINGSXX		= -Wall -Wshadow
+ARCHDEFINES		=
+ARCHINCLUDES		= -I. -isystem $(TOPDIR)/include
+ARCHINCLUDESXX		= -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
+ARCHSCRIPT		=
+
+ifeq ($(CONFIG_SIM_M32),y)
+  ARCHCPUFLAGS		+= -m32
+  ARCHCPUFLAGSXX	+= -m32
+endif
+
+CROSSDEV		=
+CC			= $(CROSSDEV)gcc
+CXX			= $(CROSSDEV)g++
+CPP			= $(CROSSDEV)gcc -E
+LD			= $(CROSSDEV)ld
+AR			= $(CROSSDEV)ar rcs
+NM			= $(CROSSDEV)nm
+OBJCOPY			= $(CROSSDEV)objcopy
+OBJDUMP			= $(CROSSDEV)objdump
+
+CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
+			  $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CXXFLAGS		= $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) \
+			  $(ARCHCPUFLAGSXX) $(ARCHINCLUDESXX) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
+AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
+
+
+# ELF module definitions
+
+CELFFLAGS = $(CFLAGS)
+CXXELFFLAGS = $(CXXFLAGS)
+
+LDELFFLAGS = -r -e main
+ifeq ($(WINTOOL),y)
+  LDELFFLAGS += -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld}"
+else
+  LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
+endif
+
+
+OBJEXT			= .o
+LIBEXT			= .a
+
+ifeq ($(HOSTOS),Cygwin)
+  EXEEXT		= .exe
+else
+  EXEEXT		=
+endif
+
+LDLINKFLAGS		= $(ARCHSCRIPT)	# Link flags used with $(LD)
+CCLINKFLAGS		= $(ARCHSCRIPT)	# Link flags used with $(CC)
+LDFLAGS			= $(ARCHSCRIPT)	# For backward compatibility, same as CCLINKFLAGS
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  LDLINKFLAGS		+= -g
+  CCLINKFLAGS		+= -g
+  LDFLAGS			+= -g
+endif
+
+ifeq ($(CONFIG_SIM_M32),y)
+  LDLINKFLAGS		+= -melf_i386
+  CCLINKFLAGS		+= -m32
+  LDFLAGS			+= -m32
+endif
+
+
+MKDEP			= $(TOPDIR)/tools/mkdeps.sh
+
+HOSTCC			= gcc
+HOSTINCLUDES		= -I.
+HOSTCFLAGS		= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
+			  $(ARCHCPUFLAGS) $(HOSTINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+HOSTLDFLAGS		=
diff --git a/nuttx/configs/sim/udgram/defconfig b/nuttx/configs/sim/udgram/defconfig
new file mode 100644
index 000000000..2f1c3f74e
--- /dev/null
+++ b/nuttx/configs/sim/udgram/defconfig
@@ -0,0 +1,884 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Nuttx/ Configuration
+#
+
+#
+# Build Setup
+#
+# CONFIG_EXPERIMENTAL is not set
+# CONFIG_DEFAULT_SMALL is not set
+CONFIG_HOST_LINUX=y
+# CONFIG_HOST_OSX is not set
+# CONFIG_HOST_WINDOWS is not set
+# CONFIG_HOST_OTHER is not set
+
+#
+# Build Configuration
+#
+# CONFIG_APPS_DIR="../apps"
+CONFIG_BUILD_FLAT=y
+# CONFIG_BUILD_2PASS is not set
+
+#
+# Binary Output Formats
+#
+# CONFIG_RRLOAD_BINARY is not set
+# CONFIG_INTELHEX_BINARY is not set
+# CONFIG_MOTOROLA_SREC is not set
+# CONFIG_RAW_BINARY is not set
+# CONFIG_UBOOT_UIMAGE is not set
+
+#
+# Customize Header Files
+#
+# CONFIG_ARCH_STDINT_H is not set
+# CONFIG_ARCH_STDBOOL_H is not set
+# CONFIG_ARCH_MATH_H is not set
+# CONFIG_ARCH_FLOAT_H is not set
+# CONFIG_ARCH_STDARG_H is not set
+
+#
+# Debug Options
+#
+# CONFIG_DEBUG is not set
+# CONFIG_ARCH_HAVE_HEAPCHECK is not set
+# CONFIG_ARCH_HAVE_STACKCHECK is not set
+CONFIG_DEBUG_SYMBOLS=y
+# CONFIG_ARCH_HAVE_CUSTOMOPT is not set
+CONFIG_DEBUG_NOOPT=y
+# CONFIG_DEBUG_FULLOPT is not set
+
+#
+# System Type
+#
+# CONFIG_ARCH_ARM is not set
+# CONFIG_ARCH_AVR is not set
+# CONFIG_ARCH_HC is not set
+# CONFIG_ARCH_MIPS is not set
+# CONFIG_ARCH_RGMP is not set
+# CONFIG_ARCH_SH is not set
+CONFIG_ARCH_SIM=y
+# CONFIG_ARCH_X86 is not set
+# CONFIG_ARCH_Z16 is not set
+# CONFIG_ARCH_Z80 is not set
+CONFIG_ARCH="sim"
+# CONFIG_NET_MULTICAST is not set
+
+#
+# Simulation Configuration Options
+#
+CONFIG_HOST_X86_64=y
+# CONFIG_HOST_X86 is not set
+# CONFIG_SIM_M32 is not set
+CONFIG_SIM_WALLTIME=y
+CONFIG_SIM_FRAMEBUFFER=y
+# CONFIG_SIM_X11FB is not set
+CONFIG_SIM_FBHEIGHT=240
+CONFIG_SIM_FBWIDTH=480
+CONFIG_SIM_FBBPP=8
+# CONFIG_SIM_SPIFLASH is not set
+
+#
+# Architecture Options
+#
+# CONFIG_ARCH_NOINTC is not set
+# CONFIG_ARCH_VECNOTIRQ is not set
+# CONFIG_ARCH_DMA is not set
+# CONFIG_ARCH_HAVE_IRQPRIO is not set
+# CONFIG_ARCH_L2CACHE is not set
+# CONFIG_ARCH_HAVE_COHERENT_DCACHE is not set
+# CONFIG_ARCH_HAVE_ADDRENV is not set
+# CONFIG_ARCH_NEED_ADDRENV_MAPPING is not set
+# CONFIG_ARCH_HAVE_VFORK is not set
+# CONFIG_ARCH_HAVE_MMU is not set
+# CONFIG_ARCH_HAVE_MPU is not set
+# CONFIG_ARCH_NAND_HWECC is not set
+# CONFIG_ARCH_HAVE_EXTCLK is not set
+# CONFIG_ARCH_STACKDUMP is not set
+# CONFIG_ENDIAN_BIG is not set
+# CONFIG_ARCH_IDLE_CUSTOM is not set
+# CONFIG_ARCH_HAVE_RAMFUNCS is not set
+# CONFIG_ARCH_HAVE_RAMVECTORS is not set
+
+#
+# Board Settings
+#
+CONFIG_BOARD_LOOPSPERMSEC=0
+# CONFIG_ARCH_CALIBRATION is not set
+
+#
+# Interrupt options
+#
+# CONFIG_ARCH_HAVE_INTERRUPTSTACK is not set
+# CONFIG_ARCH_HAVE_HIPRI_INTERRUPT is not set
+
+#
+# Boot options
+#
+CONFIG_BOOT_RUNFROMEXTSRAM=y
+# CONFIG_BOOT_RUNFROMFLASH is not set
+# CONFIG_BOOT_RUNFROMISRAM is not set
+# CONFIG_BOOT_RUNFROMSDRAM is not set
+# CONFIG_BOOT_COPYTORAM is not set
+
+#
+# Boot Memory Configuration
+#
+CONFIG_RAM_START=0x0
+CONFIG_RAM_SIZE=0
+# CONFIG_ARCH_HAVE_SDRAM is not set
+
+#
+# Board Selection
+#
+CONFIG_ARCH_BOARD_SIM=y
+# CONFIG_ARCH_BOARD_CUSTOM is not set
+CONFIG_ARCH_BOARD="sim"
+
+#
+# Common Board Options
+#
+CONFIG_NSH_MMCSDMINOR=0
+
+#
+# Board-Specific Options
+#
+
+#
+# RTOS Features
+#
+CONFIG_DISABLE_OS_API=y
+# CONFIG_DISABLE_POSIX_TIMERS is not set
+# CONFIG_DISABLE_PTHREAD is not set
+# CONFIG_DISABLE_SIGNALS is not set
+# CONFIG_DISABLE_MQUEUE is not set
+# CONFIG_DISABLE_ENVIRON is not set
+
+#
+# Clocks and Timers
+#
+CONFIG_ARCH_HAVE_TICKLESS=y
+# CONFIG_SCHED_TICKLESS is not set
+CONFIG_USEC_PER_TICK=10000
+# CONFIG_SYSTEM_TIME64 is not set
+# CONFIG_CLOCK_MONOTONIC is not set
+# CONFIG_JULIAN_TIME is not set
+CONFIG_START_YEAR=2008
+CONFIG_START_MONTH=6
+CONFIG_START_DAY=1
+CONFIG_MAX_WDOGPARMS=4
+CONFIG_PREALLOC_WDOGS=32
+CONFIG_WDOG_INTRESERVE=4
+CONFIG_PREALLOC_TIMERS=8
+
+#
+# Tasks and Scheduling
+#
+# CONFIG_INIT_NONE is not set
+CONFIG_INIT_ENTRYPOINT=y
+# CONFIG_INIT_FILEPATH is not set
+CONFIG_USER_ENTRYPOINT="nsh_main"
+CONFIG_RR_INTERVAL=0
+CONFIG_TASK_NAME_SIZE=31
+CONFIG_MAX_TASKS=64
+CONFIG_SCHED_HAVE_PARENT=y
+# CONFIG_SCHED_CHILD_STATUS is not set
+CONFIG_SCHED_WAITPID=y
+
+#
+# Pthread Options
+#
+# CONFIG_MUTEX_TYPES is not set
+CONFIG_NPTHREAD_KEYS=4
+
+#
+# Performance Monitoring
+#
+# CONFIG_SCHED_CPULOAD is not set
+# CONFIG_SCHED_INSTRUMENTATION is not set
+
+#
+# Files and I/O
+#
+CONFIG_DEV_CONSOLE=y
+# CONFIG_FDCLONE_DISABLE is not set
+# CONFIG_FDCLONE_STDIO is not set
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_NFILE_DESCRIPTORS=32
+CONFIG_NFILE_STREAMS=16
+CONFIG_NAME_MAX=32
+# CONFIG_PRIORITY_INHERITANCE is not set
+
+#
+# RTOS hooks
+#
+# CONFIG_BOARD_INITIALIZE is not set
+# CONFIG_SCHED_STARTHOOK is not set
+# CONFIG_SCHED_ATEXIT is not set
+CONFIG_SCHED_ONEXIT=y
+CONFIG_SCHED_ONEXIT_MAX=1
+
+#
+# Signal Numbers
+#
+CONFIG_SIG_SIGUSR1=1
+CONFIG_SIG_SIGUSR2=2
+CONFIG_SIG_SIGALARM=3
+CONFIG_SIG_SIGCHLD=4
+CONFIG_SIG_SIGCONDTIMEDOUT=16
+
+#
+# POSIX Message Queue Options
+#
+CONFIG_PREALLOC_MQ_MSGS=32
+CONFIG_MQ_MAXMSGSIZE=32
+
+#
+# Work Queue Support
+#
+# CONFIG_SCHED_WORKQUEUE is not set
+# CONFIG_SCHED_HPWORK is not set
+# CONFIG_SCHED_LPWORK is not set
+
+#
+# Stack and heap information
+#
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=8192
+# CONFIG_LIB_SYSCALL is not set
+
+#
+# Device Drivers
+#
+CONFIG_DISABLE_POLL=y
+CONFIG_DEV_NULL=y
+# CONFIG_DEV_ZERO is not set
+# CONFIG_LOOP is not set
+
+#
+# Buffering
+#
+# CONFIG_DRVR_WRITEBUFFER is not set
+# CONFIG_DRVR_READAHEAD is not set
+# CONFIG_RAMDISK is not set
+# CONFIG_CAN is not set
+# CONFIG_ARCH_HAVE_PWM_PULSECOUNT is not set
+# CONFIG_PWM is not set
+# CONFIG_ARCH_HAVE_I2CRESET is not set
+# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+# CONFIG_I2S is not set
+# CONFIG_RTC is not set
+# CONFIG_WATCHDOG is not set
+# CONFIG_TIMER is not set
+# CONFIG_ANALOG is not set
+# CONFIG_AUDIO_DEVICES is not set
+# CONFIG_VIDEO_DEVICES is not set
+# CONFIG_BCH is not set
+# CONFIG_INPUT is not set
+# CONFIG_LCD is not set
+# CONFIG_MMCSD is not set
+# CONFIG_MTD is not set
+# CONFIG_EEPROM is not set
+# CONFIG_NETDEVICES is not set
+# CONFIG_NET_SLIP is not set
+# CONFIG_PIPES is not set
+# CONFIG_PM is not set
+# CONFIG_POWER is not set
+# CONFIG_SENSORS is not set
+# CONFIG_SERCOMM_CONSOLE is not set
+CONFIG_SERIAL=y
+# CONFIG_DEV_LOWCONSOLE is not set
+# CONFIG_16550_UART is not set
+# CONFIG_ARCH_HAVE_UART is not set
+# CONFIG_ARCH_HAVE_UART0 is not set
+# CONFIG_ARCH_HAVE_UART1 is not set
+# CONFIG_ARCH_HAVE_UART2 is not set
+# CONFIG_ARCH_HAVE_UART3 is not set
+# CONFIG_ARCH_HAVE_UART4 is not set
+# CONFIG_ARCH_HAVE_UART5 is not set
+# CONFIG_ARCH_HAVE_UART6 is not set
+# CONFIG_ARCH_HAVE_UART7 is not set
+# CONFIG_ARCH_HAVE_UART8 is not set
+# CONFIG_ARCH_HAVE_SCI0 is not set
+# CONFIG_ARCH_HAVE_SCI1 is not set
+# CONFIG_ARCH_HAVE_USART0 is not set
+# CONFIG_ARCH_HAVE_USART1 is not set
+# CONFIG_ARCH_HAVE_USART2 is not set
+# CONFIG_ARCH_HAVE_USART3 is not set
+# CONFIG_ARCH_HAVE_USART4 is not set
+# CONFIG_ARCH_HAVE_USART5 is not set
+# CONFIG_ARCH_HAVE_USART6 is not set
+# CONFIG_ARCH_HAVE_USART7 is not set
+# CONFIG_ARCH_HAVE_USART8 is not set
+# CONFIG_ARCH_HAVE_OTHER_UART is not set
+
+#
+# USART Configuration
+#
+# CONFIG_MCU_SERIAL is not set
+# CONFIG_STANDARD_SERIAL is not set
+# CONFIG_SERIAL_IFLOWCONTROL is not set
+# CONFIG_SERIAL_OFLOWCONTROL is not set
+# CONFIG_ARCH_HAVE_SERIAL_TERMIOS is not set
+# CONFIG_USBDEV is not set
+# CONFIG_USBHOST is not set
+# CONFIG_WIRELESS is not set
+
+#
+# System Logging Device Options
+#
+
+#
+# System Logging
+#
+# CONFIG_RAMLOG is not set
+
+#
+# Networking Support
+#
+CONFIG_ARCH_HAVE_NET=y
+# CONFIG_ARCH_HAVE_PHY is not set
+CONFIG_NET=y
+CONFIG_NET_NOINTS=y
+# CONFIG_NET_PROMISCUOUS is not set
+
+#
+# Driver buffer configuration
+#
+# CONFIG_NET_MULTIBUFFER is not set
+CONFIG_NET_GUARDSIZE=2
+
+#
+# Data link support
+#
+# CONFIG_NET_MULTILINK is not set
+# CONFIG_NET_ETHERNET is not set
+
+#
+# Network Device Operations
+#
+# CONFIG_NETDEV_PHY_IOCTL is not set
+
+#
+# Internet Protocol Selection
+#
+# CONFIG_NET_IPv4 is not set
+# CONFIG_NET_IPv6 is not set
+
+#
+# Socket Support
+#
+CONFIG_NSOCKET_DESCRIPTORS=8
+CONFIG_NET_NACTIVESOCKETS=16
+# CONFIG_NET_SOCKOPTS is not set
+
+#
+# Raw Socket Support
+#
+# CONFIG_NET_PKT is not set
+
+#
+# Unix Domain Socket Support
+#
+CONFIG_NET_LOCAL=y
+
+#
+# TCP/IP Networking
+#
+# CONFIG_NET_TCP is not set
+
+#
+# UDP Networking
+#
+# CONFIG_NET_UDP is not set
+
+#
+# IGMPv2 Client Support
+#
+# CONFIG_NET_IGMP is not set
+
+#
+# ARP Configuration
+#
+
+#
+# Network I/O Buffer Support
+#
+# CONFIG_NET_IOB is not set
+# CONFIG_NET_ARCH_INCR32 is not set
+# CONFIG_NET_ARCH_CHKSUM is not set
+# CONFIG_NET_STATISTICS is not set
+
+#
+# Routing Table Configuration
+#
+# CONFIG_NET_ROUTE is not set
+
+#
+# Crypto API
+#
+# CONFIG_CRYPTO is not set
+
+#
+# File Systems
+#
+
+#
+# File system configuration
+#
+# CONFIG_DISABLE_MOUNTPOINT is not set
+# CONFIG_FS_AUTOMOUNTER is not set
+# CONFIG_DISABLE_PSEUDOFS_OPERATIONS is not set
+CONFIG_FS_READABLE=y
+CONFIG_FS_WRITABLE=y
+# CONFIG_FS_NAMED_SEMAPHORES is not set
+CONFIG_FS_MQUEUE_MPATH="/var/mqueue"
+# CONFIG_FS_RAMMAP is not set
+CONFIG_FS_FAT=y
+CONFIG_FAT_LCNAMES=y
+CONFIG_FAT_LFN=y
+CONFIG_FAT_MAXFNAME=32
+# CONFIG_FS_FATTIME is not set
+# CONFIG_FAT_DMAMEMORY is not set
+# CONFIG_NFS is not set
+# CONFIG_FS_NXFFS is not set
+CONFIG_FS_ROMFS=y
+# CONFIG_FS_SMARTFS is not set
+CONFIG_FS_BINFS=y
+# CONFIG_FS_PROCFS is not set
+
+#
+# System Logging
+#
+# CONFIG_SYSLOG is not set
+# CONFIG_SYSLOG_TIMESTAMP is not set
+
+#
+# Graphics Support
+#
+# CONFIG_NX is not set
+
+#
+# Memory Management
+#
+# CONFIG_MM_SMALL is not set
+CONFIG_MM_REGIONS=1
+# CONFIG_ARCH_HAVE_HEAP2 is not set
+# CONFIG_GRAN is not set
+
+#
+# Audio Support
+#
+# CONFIG_AUDIO is not set
+
+#
+# Binary Loader
+#
+# CONFIG_BINFMT_DISABLE is not set
+CONFIG_BINFMT_EXEPATH=y
+CONFIG_PATH_INITIAL="/bin"
+# CONFIG_NXFLAT is not set
+# CONFIG_ELF is not set
+CONFIG_BUILTIN=y
+# CONFIG_PIC is not set
+# CONFIG_SYMTAB_ORDEREDBYNAME is not set
+
+#
+# Library Routines
+#
+
+#
+# Standard C Library Options
+#
+CONFIG_STDIO_BUFFER_SIZE=64
+CONFIG_STDIO_LINEBUFFER=y
+CONFIG_NUNGET_CHARS=2
+CONFIG_LIB_HOMEDIR="/"
+# CONFIG_LIBM is not set
+# CONFIG_NOPRINTF_FIELDWIDTH is not set
+# CONFIG_LIBC_FLOATINGPOINT is not set
+# CONFIG_LIBC_IOCTL_VARIADIC is not set
+CONFIG_LIB_RAND_ORDER=1
+# CONFIG_EOL_IS_CR is not set
+# CONFIG_EOL_IS_LF is not set
+# CONFIG_EOL_IS_BOTH_CRLF is not set
+CONFIG_EOL_IS_EITHER_CRLF=y
+CONFIG_LIBC_EXECFUNCS=y
+CONFIG_EXECFUNCS_HAVE_SYMTAB=y
+CONFIG_EXECFUNCS_SYMTAB="g_symtab"
+CONFIG_EXECFUNCS_NSYMBOLS=0
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024
+CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=2048
+# CONFIG_LIBC_STRERROR is not set
+# CONFIG_LIBC_PERROR_STDOUT is not set
+CONFIG_LIBC_TMPDIR="/tmp"
+CONFIG_LIBC_MAX_TMPFILE=32
+CONFIG_ARCH_LOWPUTC=y
+# CONFIG_LIBC_LOCALTIME is not set
+CONFIG_LIB_SENDFILE_BUFSIZE=512
+# CONFIG_ARCH_ROMGETC is not set
+# CONFIG_ARCH_OPTIMIZED_FUNCTIONS is not set
+
+#
+# Non-standard Library Support
+#
+# CONFIG_LIB_KBDCODEC is not set
+# CONFIG_LIB_SLCDCODEC is not set
+
+#
+# Basic CXX Support
+#
+# CONFIG_C99_BOOL8 is not set
+# CONFIG_HAVE_CXX is not set
+
+#
+# Application Configuration
+#
+
+#
+# Built-In Applications
+#
+CONFIG_BUILTIN_PROXY_STACKSIZE=1024
+
+#
+# Examples
+#
+# CONFIG_EXAMPLES_BUTTONS is not set
+# CONFIG_EXAMPLES_CAN is not set
+# CONFIG_EXAMPLES_CONFIGDATA is not set
+# CONFIG_EXAMPLES_CPUHOG is not set
+# CONFIG_EXAMPLES_DHCPD is not set
+# CONFIG_EXAMPLES_ELF is not set
+# CONFIG_EXAMPLES_FTPC is not set
+# CONFIG_EXAMPLES_FTPD is not set
+CONFIG_EXAMPLES_HELLO=y
+# CONFIG_EXAMPLES_HELLOXX is not set
+# CONFIG_EXAMPLES_JSON is not set
+# CONFIG_EXAMPLES_HIDKBD is not set
+# CONFIG_EXAMPLES_KEYPADTEST is not set
+# CONFIG_EXAMPLES_IGMP is not set
+# CONFIG_EXAMPLES_MM is not set
+# CONFIG_EXAMPLES_MODBUS is not set
+# CONFIG_EXAMPLES_MOUNT is not set
+# CONFIG_EXAMPLES_NRF24L01TERM is not set
+CONFIG_EXAMPLES_NSH=y
+# CONFIG_EXAMPLES_NULL is not set
+# CONFIG_EXAMPLES_NX is not set
+# CONFIG_EXAMPLES_NXTERM is not set
+# CONFIG_EXAMPLES_NXFFS is not set
+# CONFIG_EXAMPLES_NXFLAT is not set
+# CONFIG_EXAMPLES_NXHELLO is not set
+# CONFIG_EXAMPLES_NXIMAGE is not set
+# CONFIG_EXAMPLES_NXLINES is not set
+# CONFIG_EXAMPLES_NXTEXT is not set
+# CONFIG_EXAMPLES_OSTEST is not set
+# CONFIG_EXAMPLES_PIPE is not set
+# CONFIG_EXAMPLES_POSIXSPAWN is not set
+# CONFIG_EXAMPLES_QENCODER is not set
+# CONFIG_EXAMPLES_RGMP is not set
+# CONFIG_EXAMPLES_ROMFS is not set
+# CONFIG_EXAMPLES_SENDMAIL is not set
+# CONFIG_EXAMPLES_SERIALBLASTER is not set
+# CONFIG_EXAMPLES_SERIALRX is not set
+# CONFIG_EXAMPLES_SERLOOP is not set
+# CONFIG_EXAMPLES_SLCD is not set
+# CONFIG_EXAMPLES_SMART_TEST is not set
+# CONFIG_EXAMPLES_SMART is not set
+# CONFIG_EXAMPLES_TCPECHO is not set
+# CONFIG_EXAMPLES_TELNETD is not set
+# CONFIG_EXAMPLES_THTTPD is not set
+# CONFIG_EXAMPLES_TIFF is not set
+# CONFIG_EXAMPLES_TOUCHSCREEN is not set
+# CONFIG_EXAMPLES_WEBSERVER is not set
+# CONFIG_EXAMPLES_USBSERIAL is not set
+# CONFIG_EXAMPLES_USBTERM is not set
+CONFIG_EXAMPLES_UDGRAM=y
+CONFIG_EXAMPLES_UDGRAM_ADDR="/var/fifo/fifo"
+CONFIG_EXAMPLES_USTREAM=y
+CONFIG_EXAMPLES_USTREAM_ADDR="/var/fifo/fifo"
+# CONFIG_EXAMPLES_WATCHDOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_TIFF is not set
+# CONFIG_GRAPHICS_TRAVELER is not set
+
+#
+# Interpreters
+#
+# CONFIG_INTERPRETERS_BAS is not set
+# CONFIG_INTERPRETERS_FICL is not set
+# CONFIG_INTERPRETERS_PCODE is not set
+# CONFIG_INTERPRETERS_MICROPYTHON is not set
+
+#
+# Network Utilities
+#
+
+#
+# Networking Utilities
+#
+# CONFIG_NETUTILS_CODECS is not set
+# CONFIG_NETUTILS_DHCPD is not set
+# CONFIG_NETUTILS_FTPC is not set
+# CONFIG_NETUTILS_FTPD is not set
+# CONFIG_NETUTILS_JSON is not set
+# CONFIG_NETUTILS_SMTP is not set
+# CONFIG_NETUTILS_TFTPC is not set
+# CONFIG_NETUTILS_THTTPD is not set
+# CONFIG_NETUTILS_NETLIB is not set
+# CONFIG_NETUTILS_WEBCLIENT is not set
+
+#
+# FreeModBus
+#
+# CONFIG_MODBUS is not set
+
+#
+# NSH Library
+#
+CONFIG_NSH_LIBRARY=y
+
+#
+# Command Line Configuration
+#
+CONFIG_NSH_READLINE=y
+# CONFIG_NSH_CLE is not set
+CONFIG_NSH_LINELEN=80
+# CONFIG_NSH_DISABLE_SEMICOLON is not set
+CONFIG_NSH_CMDPARMS=y
+CONFIG_NSH_MAXARGUMENTS=6
+CONFIG_NSH_ARGCAT=y
+CONFIG_NSH_NESTDEPTH=3
+# CONFIG_NSH_DISABLEBG is not set
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILE_APPS=y
+
+#
+# Disable Individual commands
+#
+# CONFIG_NSH_DISABLE_ADDROUTE is not set
+# CONFIG_NSH_DISABLE_CAT is not set
+# CONFIG_NSH_DISABLE_CD is not set
+# CONFIG_NSH_DISABLE_CP is not set
+# CONFIG_NSH_DISABLE_CMP is not set
+# CONFIG_NSH_DISABLE_DD is not set
+# CONFIG_NSH_DISABLE_DF is not set
+# CONFIG_NSH_DISABLE_DELROUTE is not set
+# CONFIG_NSH_DISABLE_ECHO is not set
+# CONFIG_NSH_DISABLE_EXEC is not set
+# CONFIG_NSH_DISABLE_EXIT is not set
+# CONFIG_NSH_DISABLE_FREE is not set
+# CONFIG_NSH_DISABLE_GET is not set
+# CONFIG_NSH_DISABLE_HELP is not set
+# CONFIG_NSH_DISABLE_HEXDUMP is not set
+# CONFIG_NSH_DISABLE_IFCONFIG is not set
+# CONFIG_NSH_DISABLE_KILL is not set
+# CONFIG_NSH_DISABLE_LOSETUP is not set
+# CONFIG_NSH_DISABLE_LS is not set
+# CONFIG_NSH_DISABLE_MB is not set
+# CONFIG_NSH_DISABLE_MKDIR is not set
+# CONFIG_NSH_DISABLE_MKFATFS is not set
+# CONFIG_NSH_DISABLE_MKFIFO is not set
+# CONFIG_NSH_DISABLE_MKRD is not set
+# CONFIG_NSH_DISABLE_MH is not set
+# CONFIG_NSH_DISABLE_MOUNT is not set
+# CONFIG_NSH_DISABLE_MW is not set
+# CONFIG_NSH_DISABLE_PS is not set
+# CONFIG_NSH_DISABLE_PUT is not set
+# CONFIG_NSH_DISABLE_PWD is not set
+# CONFIG_NSH_DISABLE_RM is not set
+# CONFIG_NSH_DISABLE_RMDIR is not set
+# CONFIG_NSH_DISABLE_SET is not set
+# CONFIG_NSH_DISABLE_SH is not set
+# CONFIG_NSH_DISABLE_SLEEP is not set
+# CONFIG_NSH_DISABLE_TEST is not set
+# CONFIG_NSH_DISABLE_UMOUNT is not set
+# CONFIG_NSH_DISABLE_UNSET is not set
+# CONFIG_NSH_DISABLE_USLEEP is not set
+# CONFIG_NSH_DISABLE_WGET is not set
+# CONFIG_NSH_DISABLE_XD is not set
+
+#
+# Configure Command Options
+#
+# CONFIG_NSH_CMDOPT_DF_H is not set
+CONFIG_NSH_CODECS_BUFSIZE=128
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_NSH_FILEIOSIZE=1024
+
+#
+# Scripting Support
+#
+# CONFIG_NSH_DISABLESCRIPT is not set
+# CONFIG_NSH_DISABLE_ITEF is not set
+# CONFIG_NSH_DISABLE_LOOPS is not set
+CONFIG_NSH_ROMFSETC=y
+# CONFIG_NSH_ROMFSRC is not set
+CONFIG_NSH_ROMFSMOUNTPT="/etc"
+CONFIG_NSH_INITSCRIPT="init.d/rcS"
+CONFIG_NSH_ROMFSDEVNO=1
+CONFIG_NSH_ROMFSSECTSIZE=64
+CONFIG_NSH_DEFAULTROMFS=y
+# CONFIG_NSH_ARCHROMFS is not set
+# CONFIG_NSH_CUSTOMROMFS is not set
+CONFIG_NSH_FATDEVNO=2
+CONFIG_NSH_FATSECTSIZE=512
+CONFIG_NSH_FATNSECTORS=1024
+CONFIG_NSH_FATMOUNTPT="/tmp"
+
+#
+# Console Configuration
+#
+CONFIG_NSH_CONSOLE=y
+# CONFIG_NSH_ALTCONDEV is not set
+# CONFIG_NSH_ARCHINIT is not set
+
+#
+# Networking Configuration
+#
+# CONFIG_NSH_NETINIT_THREAD is not set
+
+#
+# IP Address Configuration
+#
+# CONFIG_NSH_NOMAC is not set
+CONFIG_NSH_MAX_ROUNDTRIP=20
+
+#
+# NxWidgets/NxWM
+#
+
+#
+# Platform-specific Support
+#
+# CONFIG_PLATFORM_CONFIGDATA is not set
+
+#
+# System Libraries and NSH Add-Ons
+#
+
+#
+# Custom Free Memory Command
+#
+# CONFIG_SYSTEM_FREE is not set
+
+#
+# EMACS-like Command Line Editor
+#
+# CONFIG_SYSTEM_CLE is not set
+
+#
+# CU Minimal Terminal
+#
+# CONFIG_SYSTEM_CUTERM is not set
+
+#
+# FLASH Program Installation
+#
+# CONFIG_SYSTEM_INSTALL is not set
+
+#
+# FLASH Erase-all Command
+#
+
+#
+# Intel HEX to binary conversion
+#
+# CONFIG_SYSTEM_HEX2BIN is not set
+
+#
+# I2C tool
+#
+
+#
+# INI File Parser
+#
+# CONFIG_SYSTEM_INIFILE is not set
+
+#
+# NxPlayer media player library / command Line
+#
+
+#
+# RAM test
+#
+# CONFIG_SYSTEM_RAMTEST is not set
+
+#
+# readline()
+#
+CONFIG_SYSTEM_READLINE=y
+CONFIG_READLINE_ECHO=y
+
+#
+# P-Code Support
+#
+
+#
+# PHY Tool
+#
+
+#
+# Power Off
+#
+# CONFIG_SYSTEM_POWEROFF is not set
+
+#
+# RAMTRON
+#
+# CONFIG_SYSTEM_RAMTRON is not set
+
+#
+# SD Card
+#
+# CONFIG_SYSTEM_SDCARD is not set
+
+#
+# Sudoku
+#
+# CONFIG_SYSTEM_SUDOKU is not set
+
+#
+# Sysinfo
+#
+# CONFIG_SYSTEM_SYSINFO is not set
+
+#
+# Temperature
+#
+
+#
+# VI Work-Alike Editor
+#
+# CONFIG_SYSTEM_VI is not set
+
+#
+# Stack Monitor
+#
+
+#
+# USB CDC/ACM Device Commands
+#
+
+#
+# USB Composite Device Commands
+#
+
+#
+# USB Mass Storage Device Commands
+#
+
+#
+# USB Monitor
+#
+
+#
+# Zmodem Commands
+#
+# CONFIG_SYSTEM_ZMODEM is not set
diff --git a/nuttx/configs/sim/udgram/setenv.sh b/nuttx/configs/sim/udgram/setenv.sh
new file mode 100755
index 000000000..ac8237920
--- /dev/null
+++ b/nuttx/configs/sim/udgram/setenv.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+# sim/udgram/setenv.sh
+#
+#   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.
+#
+
+if [ "$(basename $0)" = "setenv.sh" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+if [ -z ${PATH_ORIG} ]; then export PATH_ORIG=${PATH}; fi
+
+#export NUTTX_BIN=
+#export PATH=${NUTTX_BIN}:/sbin:/usr/sbin:${PATH_ORIG}
+
+echo "PATH : ${PATH}"
diff --git a/nuttx/net/socket/recvfrom.c b/nuttx/net/socket/recvfrom.c
index 8e38d7881..f2ee27b38 100644
--- a/nuttx/net/socket/recvfrom.c
+++ b/nuttx/net/socket/recvfrom.c
@@ -1746,7 +1746,7 @@ ssize_t psock_recvfrom(FAR struct socket *psock, FAR void *buf, size_t len,
   return ret;
 
 errout:
-  errno = err;
+  set_errno(err);
   return ERROR;
 }