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https://gitee.com/mirrors_PX4/PX4-Autopilot.git
synced 2026-10-16 23:23:34 +08:00
Network discover utility from Max Holtzberg
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@5137 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
@@ -52,3 +52,7 @@ endmenu
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menu "uIP web server"
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source "$APPSDIR/netutils/webserver/Kconfig"
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endmenu
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menu "UDP Discovery Utility"
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source "$APPSDIR/netutils/discover/Kconfig"
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endmenu
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@@ -78,6 +78,10 @@ ifeq ($(CONFIG_NETUTILS_WEBCLIENT),y)
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CONFIGURED_APPS += netutils/webclient
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endif
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ifeq ($(CONFIGNETUTILS_WEBSERVER),y)
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ifeq ($(CONFIG_NETUTILS_WEBSERVER),y)
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CONFIGURED_APPS += netutils/webserver
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endif
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ifeq ($(CONFIG_NETUTILS_DISCOVER),y)
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CONFIGURED_APPS += netutils/discover
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endif
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@@ -38,7 +38,8 @@
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# Sub-directories
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ifeq ($(CONFIG_NET),y)
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SUBDIRS = uiplib dhcpc dhcpd ftpc ftpd resolv smtp telnetd webclient webserver tftpc thttpd
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SUBDIRS = uiplib dhcpc dhcpd discover ftpc ftpd resolv smtp telnetd
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SUBDIRS += webclient webserver tftpc thttpd
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endif
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all: nothing
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@@ -1,5 +1,5 @@
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netutils
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^^^^^^^^
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netutils README.txt
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^^^^^^^^^^^^^^^^^^^
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Contents
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--------
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@@ -39,6 +39,12 @@ highly influenced by uIP) include:
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dhcpd - Dynamic Host Configuration Protocol (DHCP) server. See
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apps/include/netutils/dhcpd.h for interface information.
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discover - This daemon is useful for discovering devices in local
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networks, especially with DHCP configured devices. It
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listens for UDP broadcasts which also can include a
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device class so that groups of devices can be discovered.
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It is also possible to address all classes with a kind of
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broadcast discover. (Contributed by Max Holtzberg).
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tftpc - TFTP client. See apps/include/netutils/tftp.h
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for interface information.
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telnetd - TELNET server. This is the Telnet logic adapted from
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@@ -0,0 +1,39 @@
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#
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# For a description of the syntax of this configuration file,
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# see misc/tools/kconfig-language.txt.
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#
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config NETUTILS_DISCOVER
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bool "Network Discovery Utility"
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default n
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depends on NET_UDP
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---help---
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Tool for discovering devices on the local network per UDP broadcast.
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if NETUTILS_DISCOVER
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DISCOVER_STACK_SIZE
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int "Discover Daemon Stack Size"
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default 1024
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DISCOVER_PRIORITY
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int "Discover Daemon Priority"
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default 50
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DISCOVER_PORT
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int "Discover Daemon Port Number"
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default 96
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DISCOVER_INTERFACE
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int "Network Interface Name"
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default "eth0"
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DISCOVER_DEVICE_CLASS
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hex "Network Discovery Class"
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default 0xff
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CONFIG_DISCOVER_DESCR
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string "Discoverer Description"
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default "NuttX"
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endif
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@@ -0,0 +1,100 @@
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############################################################################
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# apps/netutils/discover/Makefile
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#
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# Copyright (C) 2012 Max Holtzberg. All rights reserved.
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# Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
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#
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# Authors: Max Holtzberg <mh@uvc.de>
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# Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
|
||||
# are met:
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||||
#
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||||
# 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.
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||||
# 3. Neither the name NuttX nor the names of its contributors may be
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||||
# used to endorse or promote products derived from this software
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||||
# without specific prior written permission.
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||||
#
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||||
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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||||
# "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
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||||
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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||||
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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||||
#
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############################################################################
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-include $(TOPDIR)/.config
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-include $(TOPDIR)/Make.defs
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include $(APPDIR)/Make.defs
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# Telnet daemon
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ASRCS =
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CSRCS =
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ifeq ($(CONFIG_NET_UDP),y)
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CSRCS += discover.c
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endif
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AOBJS = $(ASRCS:.S=$(OBJEXT))
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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OBJS = $(AOBJS) $(COBJS)
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ifeq ($(WINTOOL),y)
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BIN = "${shell cygpath -w $(APPDIR)/libapps$(LIBEXT)}"
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else
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BIN = "$(APPDIR)/libapps$(LIBEXT)"
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endif
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ROOTDEPPATH = --dep-path .
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# Common build
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VPATH =
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all: .built
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.PHONY: context depend clean distclean
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$(AOBJS): %$(OBJEXT): %.S
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$(call ASSEMBLE, $<, $@)
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$(COBJS): %$(OBJEXT): %.c
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$(call COMPILE, $<, $@)
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.built: $(OBJS)
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@( for obj in $(OBJS) ; do \
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$(call ARCHIVE, $(BIN), $${obj}); \
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done ; )
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@touch .built
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context:
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.depend: Makefile $(SRCS)
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@$(MKDEP) $(ROOTDEPPATH) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
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@touch $@
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depend: .depend
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clean:
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@rm -f *.o *~ .*.swp .built
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$(call CLEAN)
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distclean: clean
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@rm -f Make.dep .depend
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-include Make.dep
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@@ -0,0 +1,9 @@
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apps/netutils/discover README.txt
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=================================
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This daemon is useful for discovering devices in local networks, especially
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with DHCP configured devices. It listens for UDP broadcasts which also can
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include a device class so that groups of devices can be discovered. It is
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also possible to address all classes with a kind of broadcast discover.
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See nuttx/tools/discover.py for a client example.
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@@ -0,0 +1,456 @@
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/****************************************************************************
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* examples/discover/main.c
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*
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* Copyright (C) 2012 Max Holtzberg. All rights reserved.
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* Copyright (C) 2008, 2011-2012 Gregory Nutt. All rights reserved.
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*
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* Authors: Max Holtzberg <mh@uvc.de>
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* Gregory Nutt <gnutt@nuttx.org>
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*
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* This code is derived from the netutils/dhcpd code.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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||||
*
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||||
* 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
|
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* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
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||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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||||
* "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.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <debug.h>
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#include <errno.h>
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#include <sched.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <apps/netutils/discover.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_DISCOVER_STACK_SIZE
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# define CONFIG_DISCOVER_STACK_SIZE 1024
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#endif
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#ifndef CONFIG_DISCOVER_PRIORITY
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# define CONFIG_DISCOVER_PRIORITY SCHED_PRIORITY_DEFAULT
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#endif
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#ifndef CONFIG_DISCOVER_PORT
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# define CONFIG_DISCOVER_PORT 96
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#endif
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#ifndef CONFIG_DISCOVER_INTERFACE
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# define CONFIG_DISCOVER_INTERFACE "eth0"
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#endif
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#ifndef CONFIG_DISCOVER_DEVICE_CLASS
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# define CONFIG_DISCOVER_DEVICE_CLASS DISCOVER_ALL
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#endif
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#ifndef CONFIG_DISCOVER_DESCR
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# define CONFIG_DISCOVER_DESCR CONFIG_ARCH_BOARD
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#endif
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/* Internal Definitions *****************************************************/
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/* Discover request packet format:
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* Byte Description
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* 0 Protocol indentifier (0x99)
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* 1 Request command 0x01
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* 2 Destination device class (For querying subsets of available devices)
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* 0xff for all devices
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* 3 Checksum (Byte 0 - Byte 1 - Byte n) & 0xff
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*/
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/* Discover response packet format:
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* Byte Description
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* 0 Protocol indentifier (0x99)
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* 1 Reponse command (0x02)
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* 2-33 Device description string with 0 bytes filled
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* 34 Checksum (Byte 0 - Byte 1 - Byte n) & 0xff
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||||
*/
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||||
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#define DISCOVER_PROTO_ID 0x99
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||||
#define DISCOVER_REQUEST 0x01
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||||
#define DISCOVER_RESPONSE 0x02
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||||
#define DISCOVER_ALL 0xff
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||||
#define DISCOVER_REQUEST_SIZE 4
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||||
#define DISCOVER_RESPONSE_SIZE 35
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||||
|
||||
/****************************************************************************
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||||
* Private Types
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||||
****************************************************************************/
|
||||
|
||||
typedef uint8_t request_t[DISCOVER_REQUEST_SIZE];
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||||
typedef uint8_t response_t[DISCOVER_RESPONSE_SIZE];
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||||
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||||
struct discover_state_s
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||||
{
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||||
in_addr_t serverip;
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||||
request_t request;
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||||
response_t response;
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||||
};
|
||||
|
||||
/****************************************************************************
|
||||
* Public Data
|
||||
****************************************************************************/
|
||||
|
||||
struct discover_state_s g_state;
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||||
|
||||
/****************************************************************************
|
||||
* Private Function Prototypes
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||||
****************************************************************************/
|
||||
|
||||
static int discover_daemon(int argc, char *argv[]);
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||||
static inline int discover_socket(void);
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||||
static inline int discover_openlistener(void);
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||||
static inline int discover_openresponder(void);
|
||||
static inline int discover_parse(request_t packet);
|
||||
static inline int discover_respond(in_addr_t *ipaddr);
|
||||
static inline void discover_initresponse(void);
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
static inline void discover_initresponse()
|
||||
{
|
||||
int chk = 0;
|
||||
int i;
|
||||
|
||||
g_state.response[0] = DISCOVER_PROTO_ID;
|
||||
g_state.response[1] = DISCOVER_RESPONSE;
|
||||
|
||||
strncpy((char*) &g_state.response[2], CONFIG_DISCOVER_DESCR,
|
||||
DISCOVER_RESPONSE_SIZE-3);
|
||||
|
||||
for (i = 0; i < DISCOVER_RESPONSE_SIZE-1; i++)
|
||||
{
|
||||
chk -= g_state.response[i];
|
||||
}
|
||||
|
||||
/* Append check sum */
|
||||
|
||||
g_state.response[DISCOVER_RESPONSE_SIZE-1] = chk & 0xff;
|
||||
}
|
||||
|
||||
static int discover_daemon(int argc, char *argv[])
|
||||
{
|
||||
int sockfd = -1;
|
||||
int nbytes;
|
||||
int addrlen = sizeof(struct sockaddr_in);
|
||||
struct sockaddr_in srcaddr;
|
||||
|
||||
memset(&g_state, 0, sizeof(struct discover_state_s));
|
||||
discover_initresponse();
|
||||
|
||||
nvdbg("Started\n");
|
||||
|
||||
for (;;)
|
||||
{
|
||||
/* Create a socket to listen for requests from DHCP clients */
|
||||
|
||||
if (sockfd < 0)
|
||||
{
|
||||
sockfd = discover_openlistener();
|
||||
if (sockfd < 0)
|
||||
{
|
||||
ndbg("Failed to create socket\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Read the next packet */
|
||||
|
||||
nbytes = recvfrom(sockfd, &g_state.request, sizeof(g_state.request), 0,
|
||||
(struct sockaddr*) &srcaddr,
|
||||
(socklen_t *) &addrlen);
|
||||
if (nbytes < 0)
|
||||
{
|
||||
/* On errors (other EINTR), close the socket and try again */
|
||||
|
||||
ndbg("recv failed: %d\n", errno);
|
||||
if (errno != EINTR)
|
||||
{
|
||||
close(sockfd);
|
||||
sockfd = -1;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
if (discover_parse(g_state.request) != OK)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
ndbg("Received discover from %08lx'\n", srcaddr.sin_addr.s_addr);
|
||||
|
||||
discover_respond(&srcaddr.sin_addr.s_addr);
|
||||
}
|
||||
|
||||
return OK;
|
||||
}
|
||||
|
||||
static inline int discover_parse(request_t packet)
|
||||
{
|
||||
int i;
|
||||
uint8_t chk = 0;
|
||||
|
||||
if (packet[0] != DISCOVER_PROTO_ID)
|
||||
{
|
||||
ndbg("Wrong protocol id: %d\n", packet[0]);
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
if (packet[1] != DISCOVER_REQUEST)
|
||||
{
|
||||
ndbg("Wrong command: %d\n", packet[1]);
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
if (packet[2] == 0xff || packet[2] == CONFIG_DISCOVER_DEVICE_CLASS)
|
||||
{
|
||||
for (i = 0; i < DISCOVER_REQUEST_SIZE-1; i++)
|
||||
chk -= packet[i];
|
||||
|
||||
if ((chk & 0xff) != packet[3])
|
||||
{
|
||||
ndbg("Checksum does not match: %d\n", packet[3]);
|
||||
return ERROR;
|
||||
}
|
||||
else
|
||||
{
|
||||
return OK;
|
||||
}
|
||||
}
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
static inline int discover_respond(in_addr_t *ipaddr)
|
||||
{
|
||||
struct sockaddr_in addr;
|
||||
int sockfd;
|
||||
int ret;
|
||||
|
||||
sockfd = discover_openresponder();
|
||||
if (sockfd >= 0)
|
||||
{
|
||||
/* Then send the reponse to the DHCP client port at that address */
|
||||
|
||||
memset(&addr, 0, sizeof(struct sockaddr_in));
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_port = HTONS(CONFIG_DISCOVER_PORT);
|
||||
addr.sin_addr.s_addr = *ipaddr;
|
||||
|
||||
ret = sendto(sockfd, &g_state.response, sizeof(g_state.response), 0,
|
||||
(struct sockaddr *)&addr, sizeof(struct sockaddr_in));
|
||||
if (ret < 0)
|
||||
{
|
||||
ndbg("Could not send discovery response: %d\n", errno);
|
||||
}
|
||||
|
||||
close(sockfd);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int discover_socket()
|
||||
{
|
||||
int sockfd;
|
||||
#if defined(HAVE_SO_REUSEADDR) || defined(HAVE_SO_BROADCAST)
|
||||
int optval;
|
||||
int ret;
|
||||
#endif
|
||||
|
||||
/* Create a socket to listen for requests from DHCP clients */
|
||||
|
||||
sockfd = socket(PF_INET, SOCK_DGRAM, 0);
|
||||
if (sockfd < 0)
|
||||
{
|
||||
ndbg("socket failed: %d\n", errno);
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
/* Configure the socket */
|
||||
|
||||
#ifdef HAVE_SO_REUSEADDR
|
||||
optval = 1;
|
||||
ret = setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int));
|
||||
if (ret < 0)
|
||||
{
|
||||
ndbg("setsockopt SO_REUSEADDR failed: %d\n", errno);
|
||||
close(sockfd);
|
||||
return ERROR;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_SO_BROADCAST
|
||||
optval = 1;
|
||||
ret = setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, (void*)&optval, sizeof(int));
|
||||
if (ret < 0)
|
||||
{
|
||||
ndbg("setsockopt SO_BROADCAST failed: %d\n", errno);
|
||||
close(sockfd);
|
||||
return ERROR;
|
||||
}
|
||||
#endif
|
||||
|
||||
return sockfd;
|
||||
}
|
||||
|
||||
static inline int discover_openlistener()
|
||||
{
|
||||
struct sockaddr_in addr;
|
||||
struct ifreq req;
|
||||
int sockfd;
|
||||
int ret;
|
||||
|
||||
/* Create a socket to listen for requests from DHCP clients */
|
||||
|
||||
sockfd = discover_socket();
|
||||
if (sockfd < 0)
|
||||
{
|
||||
ndbg("socket failed: %d\n", errno);
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
/* Get the IP address of the selected device */
|
||||
|
||||
strncpy(req.ifr_name, CONFIG_DISCOVER_INTERFACE, IFNAMSIZ);
|
||||
ret = ioctl(sockfd, SIOCGIFADDR, (unsigned long)&req);
|
||||
if (ret < 0)
|
||||
{
|
||||
ndbg("setsockopt SIOCGIFADDR failed: %d\n", errno);
|
||||
close(sockfd);
|
||||
return ERROR;
|
||||
}
|
||||
g_state.serverip = ((struct sockaddr_in*)&req.ifr_addr)->sin_addr.s_addr;
|
||||
nvdbg("serverip: %08lx\n", ntohl(g_state.serverip));
|
||||
|
||||
/* Bind the socket to a local port. We have to bind to INADDRY_ANY to
|
||||
* receive broadcast messages.
|
||||
*/
|
||||
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_port = htons(CONFIG_DISCOVER_PORT);
|
||||
addr.sin_addr.s_addr = INADDR_ANY;
|
||||
|
||||
ret = bind(sockfd, (struct sockaddr *)&addr, sizeof(struct sockaddr_in));
|
||||
if (ret < 0)
|
||||
{
|
||||
ndbg("bind failed, port=%d addr=%08lx: %d\n",
|
||||
addr.sin_port, (long)addr.sin_addr.s_addr, errno);
|
||||
close(sockfd);
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
return sockfd;
|
||||
}
|
||||
|
||||
static inline int discover_openresponder(void)
|
||||
{
|
||||
struct sockaddr_in addr;
|
||||
int sockfd;
|
||||
int ret;
|
||||
|
||||
/* Create a socket for responding to discovery message */
|
||||
|
||||
sockfd = discover_socket();
|
||||
if (sockfd < 0)
|
||||
{
|
||||
ndbg("socket failed: %d\n", errno);
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
/* Bind the socket to a local port.*/
|
||||
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_port = 0;
|
||||
addr.sin_addr.s_addr = g_state.serverip;
|
||||
|
||||
ret = bind(sockfd, (struct sockaddr *)&addr, sizeof(struct sockaddr_in));
|
||||
if (ret < 0)
|
||||
{
|
||||
ndbg("bind failed, port=%d addr=%08lx: %d\n",
|
||||
addr.sin_port, (long)addr.sin_addr.s_addr, errno);
|
||||
close(sockfd);
|
||||
return ERROR;
|
||||
}
|
||||
|
||||
return sockfd;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: discover_start
|
||||
*
|
||||
* Description:
|
||||
* Start the discover daemon.
|
||||
*
|
||||
* Return:
|
||||
* The process ID (pid) of the new discover daemon is returned on
|
||||
* success; A negated errno is returned if the daemon was not successfully
|
||||
* started.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int discover_start()
|
||||
{
|
||||
pid_t pid;
|
||||
|
||||
/* Then start the new daemon */
|
||||
|
||||
pid = TASK_CREATE("Discover daemon", CONFIG_DISCOVER_PRIORITY,
|
||||
CONFIG_DISCOVER_STACK_SIZE, discover_daemon, NULL);
|
||||
if (pid < 0)
|
||||
{
|
||||
int errval = errno;
|
||||
ndbg("Failed to start the discover daemon: %d\n", errval);
|
||||
return -errval;
|
||||
}
|
||||
|
||||
/* Return success */
|
||||
|
||||
return pid;
|
||||
}
|
||||
Reference in New Issue
Block a user