Add XML RPC server plus NXWM build fixes from Max Holtzberg

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5150 42af7a65-404d-4744-a932-0658087f49c3

7 files changed, 722 insertions, 3 deletions

diff --git a/apps/examples/Kconfig b/apps/examples/Kconfig
index 786012593..865268add 100644
--- a/apps/examples/Kconfig
+++ b/apps/examples/Kconfig
@@ -202,3 +202,7 @@ endmenu
 menu "WLAN Example"
 source "$APPSDIR/examples/wlan/Kconfig"
 endmenu
+
+menu "XML RPC Example"
+source "$APPSDIR/examples/xmlrpc/Kconfig"
+endmenu
diff --git a/apps/examples/Make.defs b/apps/examples/Make.defs
index 3bc72b52e..a6e0ae88e 100644
--- a/apps/examples/Make.defs
+++ b/apps/examples/Make.defs
@@ -225,3 +225,7 @@ endif
 ifeq ($(CONFIG_EXAMPLES_WLAN),y)
 CONFIGURED_APPS += examples/wlan
 endif
+
+ifeq ($(CONFIG_EXAMPLES_XMLRPC),y)
+CONFIGURED_APPS += examples/xmlrpc
+endif
diff --git a/apps/examples/README.txt b/apps/examples/README.txt
index 934eded4d..12d6d3892 100644
--- a/apps/examples/README.txt
+++ b/apps/examples/README.txt
@@ -1668,8 +1668,27 @@ examples/wget
   file in the configuration driver with instruction to build applications
   like:
 
-  CONFIGURED_APPS += uiplib
-  CONFIGURED_APPS += resolv
-  CONFIGURED_APPS += webclient
+    CONFIGURED_APPS += uiplib
+    CONFIGURED_APPS += resolv
+    CONFIGURED_APPS += webclient
 
+examples/xmlrpc
+
+  This example exercises the "Embeddable Lightweight XML-RPC Server" which
+  is discussed at:
+
+    http://www.drdobbs.com/web-development/an-embeddable-lightweight-xml-rpc-server/184405364
+
+  Configuration options:
 
+    CONFIG_EXAMPLES_XMLRPC_BUFFERSIZE - HTTP buffer size. Default 1024
+    CONFIG_EXAMPLES_XMLRPC_DHCPC - Use DHCP Client.  Default n. Ignored
+      if CONFIG_NSH_BUILTIN_APPS is selected.
+    CONFIG_EXAMPLES_XMLRPC_NOMAC - Use Canned MAC Address. Defaul n. Ignored
+      if CONFIG_NSH_BUILTIN_APPS is selected.
+    CONFIG_EXAMPLES_XMLRPC_IPADDR - Target IP address. Default 0x0a000002.
+      Ignored if CONFIG_NSH_BUILTIN_APPS is selected.
+    CONFIG_EXAMPLES_XMLRPC_DRIPADDR - Default Router IP address (Gateway).
+      Default 0x0a000001. Ignored if CONFIG_NSH_BUILTIN_APPS is selected.
+    CONFIG_EXAMPLES_XMLRPC_NETMASK - Network Mask.  Default 0xffffff00
+      Ignored if CONFIG_NSH_BUILTIN_APPS is selected.
diff --git a/apps/examples/xmlrpc/Kconfig b/apps/examples/xmlrpc/Kconfig
new file mode 100644
index 000000000..ee61feb50
--- /dev/null
+++ b/apps/examples/xmlrpc/Kconfig
@@ -0,0 +1,45 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+config EXAMPLES_XMLRPC
+	bool "XML RPC example"
+	default n
+	depends on NET_TCP && !DISABLE_POLL
+	select NETUTILS_XMLRPC
+	---help---
+		An example for the netutils/xmlrpc library.
+		This example implements a lightweight HTTP server and uses the xmlrpc lib
+		for parsing xml remote procedure calls.
+
+config EXAMPLES_XMLRPC_BUFFERSIZE
+	int "HTTP buffer size"
+	default 1024
+
+config EXAMPLES_XMLRPC_DHCPC
+	bool "DHCP Client"
+	default n
+	depends on EXAMPLES_XMLRPC && !NSH_BUILTIN_APPS
+	select NETUTILS_DHCPC
+	select NETUTILS_RESOLV
+
+config EXAMPLES_XMLRPC_NOMAC
+	bool "Use Canned MAC Address"
+	default n
+	depends on EXAMPLES_XMLRPC && !NSH_BUILTIN_APPS
+
+config EXAMPLES_XMLRPC_IPADDR
+	hex "Target IP address"
+	default 0x0a000002
+	depends on EXAMPLES_XMLRPC && !NSH_BUILTIN_APPS && !EXAMPLES_XMLRPC_DHCPC
+
+config EXAMPLES_XMLRPC_DRIPADDR
+	hex "Default Router IP address (Gateway)"
+	default 0x0a000001
+	depends on EXAMPLES_XMLRPC && !NSH_BUILTIN_APPS
+
+config EXAMPLES_XMLRPC_NETMASK
+	hex "Network Mask"
+	default 0xffffff00
+	depends on EXAMPLES_XMLRPC && !NSH_BUILTIN_APPS
diff --git a/apps/examples/xmlrpc/Makefile b/apps/examples/xmlrpc/Makefile
new file mode 100644
index 000000000..9fa03bf7e
--- /dev/null
+++ b/apps/examples/xmlrpc/Makefile
@@ -0,0 +1,106 @@
+############################################################################
+# apps/examples/xmlrpc/Makefile
+#
+#   Copyright (C) 2012 Max Holtzberg. All rights reserved.
+#   Copyright (C) 2008, 2010-2012 Gregory Nutt. All rights reserved.
+#
+#   Authors: Max Holtzberg <mh@uvc.de>
+#            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
+
+# XML RPC built-in application info
+
+APPNAME		= xmlrpc
+PRIORITY	= SCHED_PRIORITY_DEFAULT
+STACKSIZE	= 2048
+
+ASRCS		=
+CSRCS		= xmlrpc_main.c calls.c
+
+AOBJS		= $(ASRCS:.S=$(OBJEXT))
+COBJS		= $(CSRCS:.c=$(OBJEXT))
+
+SRCS		= $(ASRCS) $(CSRCS)
+OBJS		= $(AOBJS) $(COBJS)
+
+ifeq ($(WINTOOL),y)
+  BIN		= "${shell cygpath -w  $(APPDIR)/libapps$(LIBEXT)}"
+else
+  BIN		= "$(APPDIR)/libapps$(LIBEXT)"
+endif
+
+ROOTDEPPATH	= --dep-path .
+
+# Common build
+
+VPATH		= 
+
+all: .built
+.PHONY: clean depend distclean
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+.built: $(OBJS)
+	@( for obj in $(OBJS) ; do \
+		$(call ARCHIVE, $(BIN), $${obj}); \
+	done ; )
+	@touch .built
+
+.context:
+ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
+	$(call REGISTER,$(APPNAME),$(PRIORITY),$(STACKSIZE),$(APPNAME)_main)
+	@touch $@
+endif
+
+context: .context
+
+.depend: Makefile $(SRCS)
+	@$(MKDEP) $(ROOTDEPPATH) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+	@touch $@
+
+depend: .depend
+
+clean:
+	@rm -f *.o *~ .*.swp .built
+	$(call CLEAN)
+
+distclean: clean
+	@rm -f Make.dep .depend
+
+-include Make.dep
diff --git a/apps/examples/xmlrpc/calls.c b/apps/examples/xmlrpc/calls.c
new file mode 100644
index 000000000..bda164f4d
--- /dev/null
+++ b/apps/examples/xmlrpc/calls.c
@@ -0,0 +1,122 @@
+/****************************************************************************
+ * apps/examples/xmlrpc/calls.c
+ * 
+ *   Copyright (C) 2012 Max Holtzberg. All rights reserved.
+ *   Author: Max Holtzberg <mh@uvc.de>
+ *
+ * Based on the embeddable lightweight XML-RPC server code discussed
+ * in the article at: http://www.drdobbs.com/web-development/\
+ *    an-embeddable-lightweight-xml-rpc-server/184405364
+ *
+ *  Copyright (c) 2002 Cogito LLC.  All rights reserved.
+ * 
+ *  Redistribution and use in source and binary forms, with or 
+ *  without modification, is hereby granted without fee 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 of Cogito LLC 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 COGITO LLC AND CONTRIBUTERS 'AS IS' 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A 
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL COGITO LLC 
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+ * SPECIAL, EXEMPLARAY, 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 <string.h>
+#include <apps/netutils/xmlrpc.h>
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static int calls_get_device_stats(struct xmlrpc_s *xmlcall);
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+struct xmlrpc_entry_s get_device_stats =
+{
+  .name = "get_device_stats",
+  .func = calls_get_device_stats
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static int calls_get_device_stats(struct xmlrpc_s *xmlcall)
+{
+  char username[80], password[80];
+  char lastCommand[80], curState[80];
+  int request = 0, status, ret;
+
+  do
+    {
+      ret = xmlrpc_getstring(xmlcall, username);
+      if (ret != XMLRPC_NO_ERROR)
+        {
+          break;
+        }
+
+      ret = xmlrpc_getstring(xmlcall, password);
+      if (ret != XMLRPC_NO_ERROR)
+        {
+          break;
+        }
+
+      ret = xmlrpc_getinteger(xmlcall, &request);
+      if (ret != XMLRPC_NO_ERROR)
+        {
+          break;
+        }
+    }
+  while (0);
+
+  if (ret == XMLRPC_NO_ERROR)
+    {
+      /* Dummy up some data... */
+
+      status = 1;
+      strcpy(lastCommand, "reboot");
+      strcpy(curState, "Normal Operation");
+
+      ret = xmlrpc_buildresponse(xmlcall, "{iss}",
+                                 "status", status,
+                                 "lastCommand", lastCommand,
+                                 "currentState", curState);
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void calls_register(void)
+{
+  xmlrpc_register(&get_device_stats);
+}
diff --git a/apps/examples/xmlrpc/xmlrpc_main.c b/apps/examples/xmlrpc/xmlrpc_main.c
new file mode 100644
index 000000000..5f5ce5f06
--- /dev/null
+++ b/apps/examples/xmlrpc/xmlrpc_main.c
@@ -0,0 +1,419 @@
+/****************************************************************************
+ * apps/examples/xmlrpc/xmlrpc_main.c
+ * 
+ *   Copyright (C) 2012 Max Holtzberg. All rights reserved.
+ *   Author: Max Holtzberg <mh@uvc.de>
+ *
+ * Based on the embeddable lightweight XML-RPC server code discussed
+ * in the article at: http://www.drdobbs.com/web-development/\
+ *    an-embeddable-lightweight-xml-rpc-server/184405364
+ *
+ *  Copyright (c) 2002 Cogito LLC.  All rights reserved.
+ * 
+ *  Redistribution and use in source and binary forms, with or 
+ *  without modification, is hereby granted without fee 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 of Cogito LLC 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 COGITO LLC AND CONTRIBUTERS 'AS IS' 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A 
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL COGITO LLC 
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+ * SPECIAL, EXEMPLARAY, 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.
+ ****************************************************************************/
+
+/*
+ *  Lightweight Embedded XML-RPC Server main
+ *
+ *  mtj@cogitollc.com
+ *
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <debug.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <arpa/inet.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <net/if.h>
+#include <nuttx/net/uip/uip.h>
+#include <nuttx/net/uip/uip-arp.h>
+
+#include <apps/netutils/uiplib.h>
+#include <apps/netutils/xmlrpc.h>
+
+#ifdef CONFIG_EXAMPLES_XMLRPC_DHCPC
+#  include <arpa/inet.h>
+#endif
+
+/* Here we include the header file for the application(s) we use in
+ * our project as defined in the config/<board-name>/defconfig file
+ */
+
+/* DHCPC may be used in conjunction with any other feature (or not) */
+
+#ifdef CONFIG_EXAMPLES_XMLRPC_DHCPC
+#  include <apps/netutils/resolv.h>
+#  include <apps/netutils/dhcpc.h>
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const char *notimplemented = { "HTTP/1.1 501 Not Implemented\n\n" };
+static const char *separator = { "\015\012\015\012" };
+
+/****************************************************************************
+ * External Function Prototypes
+ ****************************************************************************/
+
+extern void calls_register(void);
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: xmlrpc_findbody
+ *
+ * Description:
+ *   Find the message body of an HTTP Request Message
+ *
+ ****************************************************************************/
+
+static char *xmlrpc_findbody(char *buf)
+{
+  char *temp;
+
+  temp = strstr(buf, separator);
+
+  if (temp == NULL)
+    {
+      return NULL;
+    }
+  else
+    {
+      return temp + 4;
+    }
+}
+
+/****************************************************************************
+ * Name: xmlrpc_getheader
+ *
+ * Description:
+ *   Find the HTTP header and return it's value.
+ *
+ ****************************************************************************/
+
+static int xmlrpc_getheader(char *buffer, char *header, char *value, int size)
+{
+  char *temp;
+  int i = 0;
+
+  temp = strstr(buffer, header);
+  if (temp)
+    {
+      /* Skip the header element */
+
+      temp += strlen(header);
+
+      /* Skip any white-space */
+
+      while (*temp == ' ')
+        {
+          temp++;
+        }
+
+      /* Copy the rest to the value parameter */
+
+      while ((*temp != ' ') && (*temp != '\n') && (i < size))
+        {
+          value[i++] = *temp++;
+        }
+
+      value[i] = 0;
+      return i;
+    }
+
+  return -1;
+}
+
+/****************************************************************************
+ * Name: xmlrpc_handler
+ *
+ * Description:
+ *    Parse and handle the current HTTP request message.
+ *
+ ****************************************************************************/
+
+static void xmlrpc_handler(int fd)
+{
+  fd_set rfds;
+  struct timeval tv;
+  int ret, len, max = 0, loadlen = -1;
+  char buffer[CONFIG_EXAMPLES_XMLRPC_BUFFERSIZE] = { 0 };
+  char value[CONFIG_XMLRPC_STRINGSIZE + 1];
+  char *temp;
+
+  /* Read in the Request Header */
+
+  do
+    {
+      FD_ZERO(&rfds);
+      FD_SET(fd, &rfds);
+
+      tv.tv_sec = 1;
+      tv.tv_usec = 0;
+
+      ndbg("[%d] select...\n", fd);
+      ret = select(fd + 1, &rfds, NULL, NULL, &tv);
+      ndbg("[%d] data ready\n", fd);
+
+      if (ret > 0)
+        {
+          if (FD_ISSET(fd, &rfds))
+            {
+              len = recv(fd, &buffer[max], 1024, 0);
+              ndbg("[%d] %d bytes received\n", fd, len);
+
+              if (len > 0)
+                {
+                  max += len;
+                  buffer[max] = 0;
+
+                  ret = xmlrpc_getheader(buffer, "Content-Length:", value,
+                                         CONFIG_EXAMPLES_XMLRPC_BUFFERSIZE);
+                  if (ret > 0)
+                    loadlen = atoi(value);
+                }
+              else
+                {
+                  ret = -1;
+                  break;
+                }
+            }
+        }
+      else
+        {
+          /* Timeout... */
+
+          ndbg("[%d] timeout\n", fd);
+          ret = -1;
+          break;
+        }
+
+      temp = strstr(buffer, separator);
+
+      if (temp)
+        {
+          if (strlen(temp) - 4 == loadlen)
+            break;
+        }
+
+    }
+  while (1);
+
+  /* Determine request */
+
+  if (!strncmp(buffer, "POST", 4))
+    {
+      temp = xmlrpc_findbody(buffer);
+      xmlrpc_parse(fd, temp);
+    }
+  else
+    {
+      write(fd, notimplemented, strlen(notimplemented));
+    }
+}
+
+/****************************************************************************
+ * Name: xmlrpc_netinit
+ *
+ * Description:
+ *    Setup network configuration.
+ *
+ ****************************************************************************/
+
+static int xmlrpc_netinit(void)
+{
+  /* If this task is excecutated as an NSH built-in function, then the network
+   * has already been configured by NSH's start-up logic.
+   */
+
+#ifndef CONFIG_NSH_BUILTIN_APPS
+  struct in_addr addr;
+#if defined(CONFIG_EXAMPLES_XMLRPC_DHCPC) || defined(CONFIG_EXAMPLES_XMLRPC_NOMAC)
+  uint8_t mac[IFHWADDRLEN];
+#endif
+#ifdef CONFIG_EXAMPLES_XMLRPC_DHCPC
+  void *handle;
+#endif
+
+/* Many embedded network interfaces must have a software assigned MAC */
+
+#ifdef CONFIG_EXAMPLES_XMLRPC_NOMAC
+  mac[0] = 0x00;
+  mac[1] = 0xe0;
+  mac[2] = 0xde;
+  mac[3] = 0xad;
+  mac[4] = 0xbe;
+  mac[5] = 0xef;
+  uip_setmacaddr("eth0", mac);
+#endif
+
+  /* Set up our host address */
+
+#ifdef CONFIG_EXAMPLES_XMLRPC_DHCPC
+  addr.s_addr = 0;
+#else
+  addr.s_addr = HTONL(CONFIG_EXAMPLES_XMLRPC_IPADDR);
+#endif
+  uip_sethostaddr("eth0", &addr);
+
+  /* Set up the default router address */
+
+  addr.s_addr = HTONL(CONFIG_EXAMPLES_XMLRPC_DRIPADDR);
+  uip_setdraddr("eth0", &addr);
+
+  /* Setup the subnet mask */
+
+  addr.s_addr = HTONL(CONFIG_EXAMPLES_XMLRPC_NETMASK);
+  uip_setnetmask("eth0", &addr);
+
+#ifdef CONFIG_EXAMPLES_XMLRPC_DHCPC
+  /* Set up the resolver */
+
+  resolv_init();
+
+  /* Get the MAC address of the NIC */
+
+  uip_getmacaddr("eth0", mac);
+
+  /* Set up the DHCPC modules */
+
+  handle = dhcpc_open(&mac, IFHWADDRLEN);
+
+  /* Get an IP address.  Note: there is no logic here for renewing the address
+   * in this example.  The address should be renewed in ds.lease_time/2
+   * seconds.
+   */
+
+  printf("Getting IP address\n");
+  if (handle)
+    {
+      struct dhcpc_state ds;
+      (void)dhcpc_request(handle, &ds);
+      uip_sethostaddr("eth1", &ds.ipaddr);
+
+      if (ds.netmask.s_addr != 0)
+        {
+          uip_setnetmask("eth0", &ds.netmask);
+        }
+
+      if (ds.default_router.s_addr != 0)
+        {
+          uip_setdraddr("eth0", &ds.default_router);
+        }
+
+      if (ds.dnsaddr.s_addr != 0)
+        {
+          resolv_conf(&ds.dnsaddr);
+        }
+
+      dhcpc_close(handle);
+      printf("IP: %s\n", inet_ntoa(ds.ipaddr));
+    }
+
+#endif /* CONFIG_EXAMPLES_XMLRPC_DHCPC */
+#endif /* CONFIG_NSH_BUILTIN_APPS */
+
+  return OK;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: xmlrpc_main
+ *
+ * Description:
+ *   The embedded HTTP server main
+ *
+ ****************************************************************************/
+
+int xmlrpc_main(int argc, char *argv[])
+{
+  int listenfd, connfd, on = 1;
+  socklen_t clilen;
+  struct sockaddr_in cliaddr, servaddr;
+
+  if (xmlrpc_netinit() < 0)
+    {
+      ndbg("Could not initialize the network interface\n");
+      return ERROR;
+    }
+
+  /* Register RPC functions. */
+
+  calls_register();
+
+  listenfd = socket(AF_INET, SOCK_STREAM, 0);
+
+  setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+
+  bzero((void *)&servaddr, sizeof(servaddr));
+  servaddr.sin_family = AF_INET;
+  servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+  servaddr.sin_port = htons(80);
+
+  bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
+
+  listen(listenfd, 5);
+
+  for (;;)
+    {
+      clilen = sizeof(cliaddr);
+      connfd = accept(listenfd, (struct sockaddr *)&cliaddr, &clilen);
+      if (connfd <= 0)
+        {
+          break;
+        }
+      ndbg("Connection accepted: %d\n", connfd);
+
+      xmlrpc_handler(connfd);
+      close(connfd);
+      ndbg("[%d] connection closed\n", connfd);
+    }
+
+  close(listenfd);
+  return (0);
+}