[PATCH V3 0/7] Git proxy handling updates (now with socat)

[PATCH V3 0/7] Git proxy handling updates (now with socat)

[Darren Hart]

The current git fetcher environment and proxy handling between bitbake,
base.bbclass, and oe-buildenv-internal has become stale and is largely
non-functional. The crux of the problem is that GIT_CONFIG is no longer honored
by anything other than the git-config command, rendering the GIT_CORE_CONFIG and
the assocaited proxy handling routines obsolete.

(the bitbake patches have been merged and dropped from this series)

The GIT_PROXY_COMMAND, ALL_PROXY, and NO_PROXY environment variables are more
than adequate for storing the required information to manage proxies with a git
helper script.

These patches series aggressively removes the old stuff, fixes up some missing
environment settings, and adds a new git proxy handling script.

Note: These patches DO NOT address the bitbake gui builder.py references to git
      proxy settings!

I felt this series was best viewed as a whole, so I'm sending it to poky AND
oe-core. Anything else seemed too likely to result in confusion, missing
context, and lots and lots of redundant discussion.

V2: Updates to the new oe-git-proxy script from feedback received
    Split out meta-yocto changes
    Split out removal of old scripts
    Minor commit log corrections

V3: Fedora 18 dropped BSD nc support, so add a patch converting oe-git-proxy
    to use socat which is broadly available. HTTP proxy still remains untested.

The following changes since commit 20b4dcace222d6b1d659a8813b4affad075ec0c6:

  dbus-native: Don't install dbus-launch (2013-02-08 14:50:38 +0000)

are available in the git repository at:
  git://git.yoctoproject.org/poky-contrib dvhart/gitproxy
  http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=dvhart/gitproxy

Darren Hart (7):
  oe-buildenv-internal: Remove GIT variables from BB_ENV_EXTRAWHITE
  oe-buildenv-internal: Add upper and lower case proxy vars to
    BB_ENV_EXTRAWHITE
  base.bbclass: Remove generate_git_config()
  oe-git-proxy: Add a new comprehensive git proxy script
  meta-yocto: Document new oe-git-proxy in site.conf.sample
  oe-git-proxy*: Remove previous git proxy solutions
  oe-git-proxy: Use socat instead of BSD nc

 meta-yocto/conf/site.conf.sample   |   35 +-
 meta/classes/base.bbclass          |   21 -
 scripts/oe-buildenv-internal       |    2 +-
 scripts/oe-git-proxy               |  133 ++
 scripts/oe-git-proxy-command       |   10 -
 scripts/oe-git-proxy-socks-command |   23 -
 scripts/oe-git-proxy-socks.c       | 2982 ------------------------------------
 7 files changed, 143 insertions(+), 3063 deletions(-)
 create mode 100755 scripts/oe-git-proxy
 delete mode 100755 scripts/oe-git-proxy-command
 delete mode 100755 scripts/oe-git-proxy-socks-command
 delete mode 100755 scripts/oe-git-proxy-socks.c

-- 
1.7.5.4

[PATCH 1/7] oe-buildenv-internal: Remove GIT variables from BB_ENV_EXTRAWHITE

[Darren Hart]

The following variables perform no function outside of bitbake:

    GIT_CONFIG
    GIT_PROXY_HOST
    GIT_PROXY_PORT
    GIT_PROXY_IGNORE

GIT_CONFIG only affects the git-config command which is not relevant to
the fetcher. This was previously used with the OE GIT_CORE_CONFIG
variable which would provide a basic git config to use instead of the
user's config. This usage was deprecated by git for over a year now:

http://git.661346.n2.nabble.com/Overriding-gitconfig-using-GIT-CONFIG-td6680977

GIT_PROXY_HOST and GIT_PROXY_PORT are not used by git.

GIT_PROXY_IGNORE was an OE construct used to create the custom git
config and had no meaning outside of the OE environment. It is not used
by git.

Remove these variables from the fetcher environment.

Users wishing to configure git to work with a proxy should define the
GIT_PROXY_COMMAND environment variable to use an external script.
NO_PROXY can be used within this script to skip the proxy for certain
hosts.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 scripts/oe-buildenv-internal |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/scripts/oe-buildenv-internal b/scripts/oe-buildenv-internal
index c3a30fb..044b6f9 100755
--- a/scripts/oe-buildenv-internal
+++ b/scripts/oe-buildenv-internal
@@ -80,4 +80,4 @@ unset BITBAKEDIR
 # Used by the runqemu script
 export BUILDDIR
 export PATH
-export BB_ENV_EXTRAWHITE="MACHINE DISTRO TCMODE TCLIBC http_proxy ftp_proxy https_proxy all_proxy ALL_PROXY no_proxy SSH_AGENT_PID SSH_AUTH_SOCK BB_SRCREV_POLICY SDKMACHINE BB_NUMBER_THREADS BB_NO_NETWORK PARALLEL_MAKE GIT_PROXY_COMMAND GIT_PROXY_IGNORE SOCKS5_PASSWD SOCKS5_USER SCREENDIR"
+export BB_ENV_EXTRAWHITE="MACHINE DISTRO TCMODE TCLIBC http_proxy ftp_proxy https_proxy all_proxy ALL_PROXY no_proxy NO_PROXY SSH_AGENT_PID SSH_AUTH_SOCK BB_SRCREV_POLICY SDKMACHINE BB_NUMBER_THREADS BB_NO_NETWORK PARALLEL_MAKE GIT_PROXY_COMMAND SOCKS5_PASSWD SOCKS5_USER SCREENDIR"
-- 
1.7.5.4

[PATCH 2/7] oe-buildenv-internal: Add upper and lower case proxy vars to BB_ENV_EXTRAWHITE

[Darren Hart]

Applications are inconsistent in their use of upper and lower case proxy
variables. Curl, for example, specifies NO_PROXY (not no_proxy) in the
man page (changed in 2009 [1]). Avoid proxy issues by ensuring both the
upper and lower case versions of each proxy variable are available in
the environment for the fetcher commands.

Add FTPS_PROXY and ftps_proxy to the list as well.

1. http://curl.haxx.se/mail/tracker-2009-04/0012.html

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 scripts/oe-buildenv-internal |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/scripts/oe-buildenv-internal b/scripts/oe-buildenv-internal
index 044b6f9..7783574 100755
--- a/scripts/oe-buildenv-internal
+++ b/scripts/oe-buildenv-internal
@@ -80,4 +80,4 @@ unset BITBAKEDIR
 # Used by the runqemu script
 export BUILDDIR
 export PATH
-export BB_ENV_EXTRAWHITE="MACHINE DISTRO TCMODE TCLIBC http_proxy ftp_proxy https_proxy all_proxy ALL_PROXY no_proxy NO_PROXY SSH_AGENT_PID SSH_AUTH_SOCK BB_SRCREV_POLICY SDKMACHINE BB_NUMBER_THREADS BB_NO_NETWORK PARALLEL_MAKE GIT_PROXY_COMMAND SOCKS5_PASSWD SOCKS5_USER SCREENDIR"
+export BB_ENV_EXTRAWHITE="MACHINE DISTRO TCMODE TCLIBC HTTP_PROXY http_proxy HTTPS_PROXY https_proxy FTP_PROXY ftp_proxy FTPS_PROXY ftps_proxy ALL_PROXY all_proxy NO_PROXY no_proxy SSH_AGENT_PID SSH_AUTH_SOCK BB_SRCREV_POLICY SDKMACHINE BB_NUMBER_THREADS BB_NO_NETWORK PARALLEL_MAKE GIT_PROXY_COMMAND SOCKS5_PASSWD SOCKS5_USER SCREENDIR"
-- 
1.7.5.4

[PATCH 3/7] base.bbclass: Remove generate_git_config()

[Darren Hart]

git no longer supports the use of GIT_CONFIG which defeats the purpose of
GIT_CORE_CONFIG and the generate_git_config() function. Remove it.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 meta/classes/base.bbclass |   21 ---------------------
 1 files changed, 0 insertions(+), 21 deletions(-)

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index 1c284b7..4d69caf 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -132,26 +132,6 @@ python base_do_unpack() {
         raise bb.build.FuncFailed(e)
 }
 
-GIT_CONFIG_PATH = "${STAGING_DIR_NATIVE}/etc"
-GIT_CONFIG = "${GIT_CONFIG_PATH}/gitconfig"
-
-def generate_git_config(e):
-    if e.data.getVar('GIT_CORE_CONFIG', True):
-        gitconfig_path = e.data.getVar('GIT_CONFIG', True)
-        proxy_command = "    gitProxy = %s\n" % e.data.getVar('OE_GIT_PROXY_COMMAND', True)
-
-        bb.mkdirhier(e.data.expand("${GIT_CONFIG_PATH}"))
-        if (os.path.exists(gitconfig_path)):
-            os.remove(gitconfig_path)
-
-        f = open(gitconfig_path, 'w')
-        f.write("[core]\n")
-        ignore_hosts = e.data.getVar('GIT_PROXY_IGNORE', True).split()
-        for ignore_host in ignore_hosts:
-            f.write("    gitProxy = none for %s\n" % ignore_host)
-        f.write(proxy_command)
-        f.close
-
 def pkgarch_mapping(d):
     # Compatibility mappings of TUNE_PKGARCH (opt in)
     if d.getVar("PKGARCHCOMPAT_ARMV7A", True):
@@ -310,7 +290,6 @@ addhandler base_eventhandler
 python base_eventhandler() {
     if isinstance(e, bb.event.ConfigParsed):
         e.data.setVar('BB_VERSION', bb.__version__)
-        generate_git_config(e)
         pkgarch_mapping(e.data)
         preferred_ml_updates(e.data)
         e.data.appendVar('DISTRO_FEATURES', oe.utils.features_backfill("DISTRO_FEATURES", e.data))
-- 
1.7.5.4

[PATCH 4/7] oe-git-proxy: Add a new comprehensive git proxy script

[Darren Hart]

oe-git-proxy.sh is a simple tool to be used via GIT_PROXY_COMMAND. It
uses BSD netcat to make SOCKS5 or HTTPS proxy connections. It uses
ALL_PROXY to determine the proxy server, protocol, and port. It uses
NO_PROXY to skip using the proxy for a comma delimited list of hosts,
host globs (*.example.com), IPs, or CIDR masks (192.168.1.0/24). It is
known to work with both bash and dash shells.

V2: Implement recommendations by Enrico Scholz:
    o Use exec for the nc calls
    o Use "$@" instead of $* to avoid quoting issues inherent with $*
    o Use bash explicitly and simplify some of the string manipulations
    Also:
    o Drop the .sh in the name per Otavio Salvador
    o Remove a stray debug statement

V3: Implement recommendations by Otavio Salvador
    o GPL license blurb
    o Fix minor typo in comment block

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Cc: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Cc: Otavio Salvador <otavio@ossystems.com.br>

git-proxy cleanup

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 scripts/oe-git-proxy |  138 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 138 insertions(+), 0 deletions(-)
 create mode 100755 scripts/oe-git-proxy

diff --git a/scripts/oe-git-proxy b/scripts/oe-git-proxy
new file mode 100755
index 0000000..4c2f179
--- /dev/null
+++ b/scripts/oe-git-proxy
@@ -0,0 +1,138 @@
+#!/bin/bash
+
+# oe-git-proxy is a simple tool to be via GIT_PROXY_COMMAND. It uses BSD netcat
+# to make SOCKS5 or HTTPS proxy connections. It uses ALL_PROXY to determine the
+# proxy server, protocol, and port. It uses NO_PROXY to skip using the proxy for
+# a comma delimited list of hosts, host globs (*.example.com), IPs, or CIDR
+# masks (192.168.1.0/24). It is known to work with both bash and dash shells.
+#
+# BSD netcat is provided by netcat-openbsd on Ubuntu and nc on Fedora.
+#
+# Example ALL_PROXY values:
+# ALL_PROXY=socks://socks.example.com:1080
+# ALL_PROXY=https://proxy.example.com:8080
+#
+# Copyright (c) 2013, Intel Corporation.
+# All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# AUTHORS
+# Darren Hart <dvhart@linux.intel.com>
+
+# Locate the netcat binary
+NC=$(which nc 2>/dev/null)
+if [ $? -ne 0 ]; then
+	echo "ERROR: nc binary not in PATH"
+	exit 1
+fi
+METHOD=""
+
+# Test for a valid IPV4 quad with optional bitmask
+valid_ipv4() {
+	echo $1 | egrep -q "^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}(/(3[0-2]|[1-2]?[0-9]))?$"
+	return $?
+}
+
+# Convert an IPV4 address into a 32bit integer
+ipv4_val() {
+	IP="$1"
+	SHIFT=24
+	VAL=0
+	for B in ${IP//./ }; do
+		VAL=$(($VAL+$(($B<<$SHIFT))))
+		SHIFT=$(($SHIFT-8))
+	done
+	echo "$VAL"
+}
+
+# Determine if two IPs are equivalent, or if the CIDR contains the IP
+match_ipv4() {
+	CIDR=$1
+	IP=$2
+
+	if [ -z "${IP%%$CIDR}" ]; then
+		return 0
+	fi
+
+	# Determine the mask bitlength
+	BITS=${CIDR##*/}
+	if [ -z "$BITS" ]; then
+		return 1
+	fi
+
+	IPVAL=$(ipv4_val $IP)
+	IP2VAL=$(ipv4_val ${CIDR%%/*})
+
+	# OR in the unmasked bits
+	for i in $(seq 0 $((32-$BITS))); do
+		IP2VAL=$(($IP2VAL|$((1<<$i))))
+		IPVAL=$(($IPVAL|$((1<<$i))))
+	done
+
+	if [ $IPVAL -eq $IP2VAL ]; then
+		return 0
+	fi
+	return 1
+}
+
+# Test to see if GLOB matches HOST
+match_host() {
+	HOST=$1
+	GLOB=$2
+
+	if [ -z "${HOST%%$GLOB}" ]; then
+		return 0
+	fi
+
+	# Match by netmask
+	if valid_ipv4 $GLOB; then
+		HOST_IP=$(gethostip -d $HOST)
+		if valid_ipv4 $HOST_IP; then
+			match_ipv4 $GLOB $HOST_IP
+			if [ $? -eq 0 ]; then
+				return 0
+			fi
+		fi
+	fi
+
+	return 1
+}
+
+# If no proxy is set, just connect directly
+if [ -z "$ALL_PROXY" ]; then
+	exec $NC -X connect "$@"
+fi
+
+# Connect directly to hosts in NO_PROXY
+for H in ${NO_PROXY//,/ }; do
+	if match_host $1 $H; then
+		METHOD="-X connect"
+		break
+	fi
+done
+
+if [ -z "$METHOD" ]; then
+	# strip the protocol and the trailing slash
+	PROTO=$(echo $ALL_PROXY | sed -e 's/\([^:]*\):\/\/.*/\1/')
+	PROXY=$(echo $ALL_PROXY | sed -e 's/.*:\/\/\([^:]*:[0-9]*\).*/\1/')
+	if [ "$PROTO" = "socks" ]; then
+		METHOD="-X 5 -x $PROXY"
+	elif [ "$PROTO" = "https" ]; then
+		METHOD="-X connect -x $PROXY"
+	fi
+fi
+
+exec $NC $METHOD "$@"
-- 
1.7.5.4

Re: [PATCH 4/7] oe-git-proxy: Add a new comprehensive git proxy script

[Otavio Salvador]

On Fri, Feb 8, 2013 at 8:27 PM, Darren Hart <dvhart@linux.intel.com> wrote:
> oe-git-proxy.sh is a simple tool to be used via GIT_PROXY_COMMAND. It
> uses BSD netcat to make SOCKS5 or HTTPS proxy connections. It uses
> ALL_PROXY to determine the proxy server, protocol, and port. It uses
> NO_PROXY to skip using the proxy for a comma delimited list of hosts,
> host globs (*.example.com), IPs, or CIDR masks (192.168.1.0/24). It is
> known to work with both bash and dash shells.
>
> V2: Implement recommendations by Enrico Scholz:
>     o Use exec for the nc calls
>     o Use "$@" instead of $* to avoid quoting issues inherent with $*
>     o Use bash explicitly and simplify some of the string manipulations
>     Also:
>     o Drop the .sh in the name per Otavio Salvador
>     o Remove a stray debug statement
>
> V3: Implement recommendations by Otavio Salvador
>     o GPL license blurb
>     o Fix minor typo in comment block
>
> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
> Cc: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
> Cc: Otavio Salvador <otavio@ossystems.com.br>
>
> git-proxy cleanup

All those comments ought to be bellow --- or those will be included in
commit log.

> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
> ---
>  scripts/oe-git-proxy |  138 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 138 insertions(+), 0 deletions(-)
>  create mode 100755 scripts/oe-git-proxy
>
> diff --git a/scripts/oe-git-proxy b/scripts/oe-git-proxy
> new file mode 100755
> index 0000000..4c2f179
> --- /dev/null
> +++ b/scripts/oe-git-proxy
> @@ -0,0 +1,138 @@
> +#!/bin/bash
> +
> +# oe-git-proxy is a simple tool to be via GIT_PROXY_COMMAND. It uses BSD netcat
> +# to make SOCKS5 or HTTPS proxy connections. It uses ALL_PROXY to determine the
> +# proxy server, protocol, and port. It uses NO_PROXY to skip using the proxy for
> +# a comma delimited list of hosts, host globs (*.example.com), IPs, or CIDR
> +# masks (192.168.1.0/24). It is known to work with both bash and dash shells.
> +#
> +# BSD netcat is provided by netcat-openbsd on Ubuntu and nc on Fedora.
> +#
> +# Example ALL_PROXY values:
> +# ALL_PROXY=socks://socks.example.com:1080
> +# ALL_PROXY=https://proxy.example.com:8080
> +#
> +# Copyright (c) 2013, Intel Corporation.
> +# All rights reserved.
> +#
> +# This program is free software; you can redistribute it and/or modify
> +# it under the terms of the GNU General Public License as published by
> +# the Free Software Foundation; either version 2 of the License, or
> +# (at your option) any later version.
> +#
> +# This program is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program; if not, write to the Free Software
> +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
> +#
> +# AUTHORS
> +# Darren Hart <dvhart@linux.intel.com>
> +
> +# Locate the netcat binary
> +NC=$(which nc 2>/dev/null)
> +if [ $? -ne 0 ]; then
> +       echo "ERROR: nc binary not in PATH"
> +       exit 1
> +fi
> +METHOD=""
> +
> +# Test for a valid IPV4 quad with optional bitmask
> +valid_ipv4() {
> +       echo $1 | egrep -q "^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}(/(3[0-2]|[1-2]?[0-9]))?$"
> +       return $?
> +}
> +
> +# Convert an IPV4 address into a 32bit integer
> +ipv4_val() {
> +       IP="$1"
> +       SHIFT=24
> +       VAL=0
> +       for B in ${IP//./ }; do
> +               VAL=$(($VAL+$(($B<<$SHIFT))))
> +               SHIFT=$(($SHIFT-8))
> +       done
> +       echo "$VAL"
> +}
> +
> +# Determine if two IPs are equivalent, or if the CIDR contains the IP
> +match_ipv4() {
> +       CIDR=$1
> +       IP=$2
> +
> +       if [ -z "${IP%%$CIDR}" ]; then
> +               return 0
> +       fi
> +
> +       # Determine the mask bitlength
> +       BITS=${CIDR##*/}
> +       if [ -z "$BITS" ]; then
> +               return 1
> +       fi
> +
> +       IPVAL=$(ipv4_val $IP)
> +       IP2VAL=$(ipv4_val ${CIDR%%/*})
> +
> +       # OR in the unmasked bits
> +       for i in $(seq 0 $((32-$BITS))); do
> +               IP2VAL=$(($IP2VAL|$((1<<$i))))
> +               IPVAL=$(($IPVAL|$((1<<$i))))
> +       done
> +
> +       if [ $IPVAL -eq $IP2VAL ]; then
> +               return 0
> +       fi
> +       return 1
> +}
> +
> +# Test to see if GLOB matches HOST
> +match_host() {
> +       HOST=$1
> +       GLOB=$2
> +
> +       if [ -z "${HOST%%$GLOB}" ]; then
> +               return 0
> +       fi
> +
> +       # Match by netmask
> +       if valid_ipv4 $GLOB; then
> +               HOST_IP=$(gethostip -d $HOST)
> +               if valid_ipv4 $HOST_IP; then
> +                       match_ipv4 $GLOB $HOST_IP
> +                       if [ $? -eq 0 ]; then
> +                               return 0
> +                       fi
> +               fi
> +       fi
> +
> +       return 1
> +}
> +
> +# If no proxy is set, just connect directly
> +if [ -z "$ALL_PROXY" ]; then
> +       exec $NC -X connect "$@"
> +fi
> +
> +# Connect directly to hosts in NO_PROXY
> +for H in ${NO_PROXY//,/ }; do
> +       if match_host $1 $H; then
> +               METHOD="-X connect"
> +               break
> +       fi
> +done
> +
> +if [ -z "$METHOD" ]; then
> +       # strip the protocol and the trailing slash
> +       PROTO=$(echo $ALL_PROXY | sed -e 's/\([^:]*\):\/\/.*/\1/')
> +       PROXY=$(echo $ALL_PROXY | sed -e 's/.*:\/\/\([^:]*:[0-9]*\).*/\1/')
> +       if [ "$PROTO" = "socks" ]; then
> +               METHOD="-X 5 -x $PROXY"
> +       elif [ "$PROTO" = "https" ]; then
> +               METHOD="-X connect -x $PROXY"
> +       fi
> +fi
> +
> +exec $NC $METHOD "$@"
> --
> 1.7.5.4
>



-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

Re: [PATCH 4/7] oe-git-proxy: Add a new comprehensive git proxy script

[Darren Hart]

On 02/08/2013 06:43 PM, Otavio Salvador wrote:
> On Fri, Feb 8, 2013 at 8:27 PM, Darren Hart <dvhart@linux.intel.com> wrote:
>> oe-git-proxy.sh is a simple tool to be used via GIT_PROXY_COMMAND. It
>> uses BSD netcat to make SOCKS5 or HTTPS proxy connections. It uses
>> ALL_PROXY to determine the proxy server, protocol, and port. It uses
>> NO_PROXY to skip using the proxy for a comma delimited list of hosts,
>> host globs (*.example.com), IPs, or CIDR masks (192.168.1.0/24). It is
>> known to work with both bash and dash shells.
>>
>> V2: Implement recommendations by Enrico Scholz:
>>     o Use exec for the nc calls
>>     o Use "$@" instead of $* to avoid quoting issues inherent with $*
>>     o Use bash explicitly and simplify some of the string manipulations
>>     Also:
>>     o Drop the .sh in the name per Otavio Salvador
>>     o Remove a stray debug statement
>>
>> V3: Implement recommendations by Otavio Salvador
>>     o GPL license blurb
>>     o Fix minor typo in comment block
>>
>> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
>> Cc: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
>> Cc: Otavio Salvador <otavio@ossystems.com.br>
>>
>> git-proxy cleanup
> 
> All those comments ought to be bellow --- or those will be included in
> commit log.
> 

Which is fine.


>> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
>> ---
>>  scripts/oe-git-proxy |  138 ++++++++++++++++++++++++++++++++++++++++++++++++++
>>  1 files changed, 138 insertions(+), 0 deletions(-)
>>  create mode 100755 scripts/oe-git-proxy
>>
>> diff --git a/scripts/oe-git-proxy b/scripts/oe-git-proxy
>> new file mode 100755
>> index 0000000..4c2f179
>> --- /dev/null
>> +++ b/scripts/oe-git-proxy
>> @@ -0,0 +1,138 @@
>> +#!/bin/bash
>> +
>> +# oe-git-proxy is a simple tool to be via GIT_PROXY_COMMAND. It uses BSD netcat
>> +# to make SOCKS5 or HTTPS proxy connections. It uses ALL_PROXY to determine the
>> +# proxy server, protocol, and port. It uses NO_PROXY to skip using the proxy for
>> +# a comma delimited list of hosts, host globs (*.example.com), IPs, or CIDR
>> +# masks (192.168.1.0/24). It is known to work with both bash and dash shells.
>> +#
>> +# BSD netcat is provided by netcat-openbsd on Ubuntu and nc on Fedora.
>> +#
>> +# Example ALL_PROXY values:
>> +# ALL_PROXY=socks://socks.example.com:1080
>> +# ALL_PROXY=https://proxy.example.com:8080
>> +#
>> +# Copyright (c) 2013, Intel Corporation.
>> +# All rights reserved.
>> +#
>> +# This program is free software; you can redistribute it and/or modify
>> +# it under the terms of the GNU General Public License as published by
>> +# the Free Software Foundation; either version 2 of the License, or
>> +# (at your option) any later version.
>> +#
>> +# This program is distributed in the hope that it will be useful,
>> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
>> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> +# GNU General Public License for more details.
>> +#
>> +# You should have received a copy of the GNU General Public License
>> +# along with this program; if not, write to the Free Software
>> +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
>> +#
>> +# AUTHORS
>> +# Darren Hart <dvhart@linux.intel.com>
>> +
>> +# Locate the netcat binary
>> +NC=$(which nc 2>/dev/null)
>> +if [ $? -ne 0 ]; then
>> +       echo "ERROR: nc binary not in PATH"
>> +       exit 1
>> +fi
>> +METHOD=""
>> +
>> +# Test for a valid IPV4 quad with optional bitmask
>> +valid_ipv4() {
>> +       echo $1 | egrep -q "^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}(/(3[0-2]|[1-2]?[0-9]))?$"
>> +       return $?
>> +}
>> +
>> +# Convert an IPV4 address into a 32bit integer
>> +ipv4_val() {
>> +       IP="$1"
>> +       SHIFT=24
>> +       VAL=0
>> +       for B in ${IP//./ }; do
>> +               VAL=$(($VAL+$(($B<<$SHIFT))))
>> +               SHIFT=$(($SHIFT-8))
>> +       done
>> +       echo "$VAL"
>> +}
>> +
>> +# Determine if two IPs are equivalent, or if the CIDR contains the IP
>> +match_ipv4() {
>> +       CIDR=$1
>> +       IP=$2
>> +
>> +       if [ -z "${IP%%$CIDR}" ]; then
>> +               return 0
>> +       fi
>> +
>> +       # Determine the mask bitlength
>> +       BITS=${CIDR##*/}
>> +       if [ -z "$BITS" ]; then
>> +               return 1
>> +       fi
>> +
>> +       IPVAL=$(ipv4_val $IP)
>> +       IP2VAL=$(ipv4_val ${CIDR%%/*})
>> +
>> +       # OR in the unmasked bits
>> +       for i in $(seq 0 $((32-$BITS))); do
>> +               IP2VAL=$(($IP2VAL|$((1<<$i))))
>> +               IPVAL=$(($IPVAL|$((1<<$i))))
>> +       done
>> +
>> +       if [ $IPVAL -eq $IP2VAL ]; then
>> +               return 0
>> +       fi
>> +       return 1
>> +}
>> +
>> +# Test to see if GLOB matches HOST
>> +match_host() {
>> +       HOST=$1
>> +       GLOB=$2
>> +
>> +       if [ -z "${HOST%%$GLOB}" ]; then
>> +               return 0
>> +       fi
>> +
>> +       # Match by netmask
>> +       if valid_ipv4 $GLOB; then
>> +               HOST_IP=$(gethostip -d $HOST)
>> +               if valid_ipv4 $HOST_IP; then
>> +                       match_ipv4 $GLOB $HOST_IP
>> +                       if [ $? -eq 0 ]; then
>> +                               return 0
>> +                       fi
>> +               fi
>> +       fi
>> +
>> +       return 1
>> +}
>> +
>> +# If no proxy is set, just connect directly
>> +if [ -z "$ALL_PROXY" ]; then
>> +       exec $NC -X connect "$@"
>> +fi
>> +
>> +# Connect directly to hosts in NO_PROXY
>> +for H in ${NO_PROXY//,/ }; do
>> +       if match_host $1 $H; then
>> +               METHOD="-X connect"
>> +               break
>> +       fi
>> +done
>> +
>> +if [ -z "$METHOD" ]; then
>> +       # strip the protocol and the trailing slash
>> +       PROTO=$(echo $ALL_PROXY | sed -e 's/\([^:]*\):\/\/.*/\1/')
>> +       PROXY=$(echo $ALL_PROXY | sed -e 's/.*:\/\/\([^:]*:[0-9]*\).*/\1/')
>> +       if [ "$PROTO" = "socks" ]; then
>> +               METHOD="-X 5 -x $PROXY"
>> +       elif [ "$PROTO" = "https" ]; then
>> +               METHOD="-X connect -x $PROXY"
>> +       fi
>> +fi
>> +
>> +exec $NC $METHOD "$@"
>> --
>> 1.7.5.4
>>
> 
> 
> 

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel

Re: [PATCH 4/7] oe-git-proxy: Add a new comprehensive git proxy script

[Otavio Salvador]

On Sat, Feb 9, 2013 at 2:59 PM, Darren Hart <dvhart@linux.intel.com> wrote:
>
>
> On 02/08/2013 06:43 PM, Otavio Salvador wrote:
>> On Fri, Feb 8, 2013 at 8:27 PM, Darren Hart <dvhart@linux.intel.com> wrote:
>>> oe-git-proxy.sh is a simple tool to be used via GIT_PROXY_COMMAND. It
>>> uses BSD netcat to make SOCKS5 or HTTPS proxy connections. It uses
>>> ALL_PROXY to determine the proxy server, protocol, and port. It uses
>>> NO_PROXY to skip using the proxy for a comma delimited list of hosts,
>>> host globs (*.example.com), IPs, or CIDR masks (192.168.1.0/24). It is
>>> known to work with both bash and dash shells.
>>>
>>> V2: Implement recommendations by Enrico Scholz:
>>>     o Use exec for the nc calls
>>>     o Use "$@" instead of $* to avoid quoting issues inherent with $*
>>>     o Use bash explicitly and simplify some of the string manipulations
>>>     Also:
>>>     o Drop the .sh in the name per Otavio Salvador
>>>     o Remove a stray debug statement
>>>
>>> V3: Implement recommendations by Otavio Salvador
>>>     o GPL license blurb
>>>     o Fix minor typo in comment block
>>>
>>> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
>>> Cc: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
>>> Cc: Otavio Salvador <otavio@ossystems.com.br>
>>>
>>> git-proxy cleanup
>>
>> All those comments ought to be bellow --- or those will be included in
>> commit log.
>>
>
> Which is fine.

Well, usually the log of the revisions are not included in the commit
logs; any special reason for it to be done different?

-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

Re: [PATCH 4/7] oe-git-proxy: Add a new comprehensive git proxy script

[Bruce Ashfield]

[-- Attachment #1: Type: text/plain, Size: 2627 bytes --]

On Sat, Feb 9, 2013 at 12:02 PM, Otavio Salvador <otavio@ossystems.com.br>wrote:

> On Sat, Feb 9, 2013 at 2:59 PM, Darren Hart <dvhart@linux.intel.com>
> wrote:
> >
> >
> > On 02/08/2013 06:43 PM, Otavio Salvador wrote:
> >> On Fri, Feb 8, 2013 at 8:27 PM, Darren Hart <dvhart@linux.intel.com>
> wrote:
> >>> oe-git-proxy.sh is a simple tool to be used via GIT_PROXY_COMMAND. It
> >>> uses BSD netcat to make SOCKS5 or HTTPS proxy connections. It uses
> >>> ALL_PROXY to determine the proxy server, protocol, and port. It uses
> >>> NO_PROXY to skip using the proxy for a comma delimited list of hosts,
> >>> host globs (*.example.com), IPs, or CIDR masks (192.168.1.0/24). It is
> >>> known to work with both bash and dash shells.
> >>>
> >>> V2: Implement recommendations by Enrico Scholz:
> >>>     o Use exec for the nc calls
> >>>     o Use "$@" instead of $* to avoid quoting issues inherent with $*
> >>>     o Use bash explicitly and simplify some of the string manipulations
> >>>     Also:
> >>>     o Drop the .sh in the name per Otavio Salvador
> >>>     o Remove a stray debug statement
> >>>
> >>> V3: Implement recommendations by Otavio Salvador
> >>>     o GPL license blurb
> >>>     o Fix minor typo in comment block
> >>>
> >>> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
> >>> Cc: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
> >>> Cc: Otavio Salvador <otavio@ossystems.com.br>
> >>>
> >>> git-proxy cleanup
> >>
> >> All those comments ought to be bellow --- or those will be included in
> >> commit log.
> >>
> >
> > Which is fine.
>
> Well, usually the log of the revisions are not included in the commit
> logs; any special reason for it to be done different?
>

Randomly jumping in,

It's not all that uncommon for kernel developers to keep the revision
history
in long logs. It's used as a way to track the intermediate history, give
review credit .. or just "because".

So while not always done, it isn't unheard of. I have no strong opinion one
way or the other, just thought I'd throw that out!

Cheers,

Bruce


>
> --
> Otavio Salvador                             O.S. Systems
> E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
> Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>



-- 
"Thou shalt not follow the NULL pointer, for chaos and madness await thee
at its end"

[-- Attachment #2: Type: text/html, Size: 4538 bytes --]

Re: [OE-core] [PATCH 4/7] oe-git-proxy: Add a new comprehensive git proxy script

[Bruce Ashfield]

[-- Attachment #1: Type: text/plain, Size: 2627 bytes --]

On Sat, Feb 9, 2013 at 12:02 PM, Otavio Salvador <otavio@ossystems.com.br>wrote:

> On Sat, Feb 9, 2013 at 2:59 PM, Darren Hart <dvhart@linux.intel.com>
> wrote:
> >
> >
> > On 02/08/2013 06:43 PM, Otavio Salvador wrote:
> >> On Fri, Feb 8, 2013 at 8:27 PM, Darren Hart <dvhart@linux.intel.com>
> wrote:
> >>> oe-git-proxy.sh is a simple tool to be used via GIT_PROXY_COMMAND. It
> >>> uses BSD netcat to make SOCKS5 or HTTPS proxy connections. It uses
> >>> ALL_PROXY to determine the proxy server, protocol, and port. It uses
> >>> NO_PROXY to skip using the proxy for a comma delimited list of hosts,
> >>> host globs (*.example.com), IPs, or CIDR masks (192.168.1.0/24). It is
> >>> known to work with both bash and dash shells.
> >>>
> >>> V2: Implement recommendations by Enrico Scholz:
> >>>     o Use exec for the nc calls
> >>>     o Use "$@" instead of $* to avoid quoting issues inherent with $*
> >>>     o Use bash explicitly and simplify some of the string manipulations
> >>>     Also:
> >>>     o Drop the .sh in the name per Otavio Salvador
> >>>     o Remove a stray debug statement
> >>>
> >>> V3: Implement recommendations by Otavio Salvador
> >>>     o GPL license blurb
> >>>     o Fix minor typo in comment block
> >>>
> >>> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
> >>> Cc: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
> >>> Cc: Otavio Salvador <otavio@ossystems.com.br>
> >>>
> >>> git-proxy cleanup
> >>
> >> All those comments ought to be bellow --- or those will be included in
> >> commit log.
> >>
> >
> > Which is fine.
>
> Well, usually the log of the revisions are not included in the commit
> logs; any special reason for it to be done different?
>

Randomly jumping in,

It's not all that uncommon for kernel developers to keep the revision
history
in long logs. It's used as a way to track the intermediate history, give
review credit .. or just "because".

So while not always done, it isn't unheard of. I have no strong opinion one
way or the other, just thought I'd throw that out!

Cheers,

Bruce


>
> --
> Otavio Salvador                             O.S. Systems
> E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
> Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>



-- 
"Thou shalt not follow the NULL pointer, for chaos and madness await thee
at its end"

[-- Attachment #2: Type: text/html, Size: 4538 bytes --]

Re: [PATCH 4/7] oe-git-proxy: Add a new comprehensive git proxy script

[Darren Hart]

On 02/09/2013 06:48 PM, Bruce Ashfield wrote:

>     >> All those comments ought to be bellow --- or those will be included in
>     >> commit log.
>     >>
>     >
>     > Which is fine.
> 
>     Well, usually the log of the revisions are not included in the commit
>     logs; any special reason for it to be done different?
> 
> 
> Randomly jumping in,
> 
> It's not all that uncommon for kernel developers to keep the revision
> history
> in long logs. It's used as a way to track the intermediate history, give 
> review credit .. or just "because".
> 
> So while not always done, it isn't unheard of. I have no strong opinion one
> way or the other, just thought I'd throw that out!

I'll just leave that to the maintainer. If whoever pushes it objects,
they can drop it, or ask me to resend.


-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel

Re: [OE-core] [PATCH 4/7] oe-git-proxy: Add a new comprehensive git proxy script

[Darren Hart]

On 02/09/2013 06:48 PM, Bruce Ashfield wrote:

>     >> All those comments ought to be bellow --- or those will be included in
>     >> commit log.
>     >>
>     >
>     > Which is fine.
> 
>     Well, usually the log of the revisions are not included in the commit
>     logs; any special reason for it to be done different?
> 
> 
> Randomly jumping in,
> 
> It's not all that uncommon for kernel developers to keep the revision
> history
> in long logs. It's used as a way to track the intermediate history, give 
> review credit .. or just "because".
> 
> So while not always done, it isn't unheard of. I have no strong opinion one
> way or the other, just thought I'd throw that out!

I'll just leave that to the maintainer. If whoever pushes it objects,
they can drop it, or ask me to resend.


-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel

[PATCH 5/7] meta-yocto: Document new oe-git-proxy in site.conf.sample

[Darren Hart]

The new oe-git-proxy.sh should address all git proxying needs. Document
its usage in meta-yocto/conf/site.conf.sample and remove references to
the old mechanisms.

V2: Separate out the meta-yocto changes from the oe-core changes

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 meta-yocto/conf/site.conf.sample |   35 +++++++++--------------------------
 1 files changed, 9 insertions(+), 26 deletions(-)

diff --git a/meta-yocto/conf/site.conf.sample b/meta-yocto/conf/site.conf.sample
index 68d1da9..b2d01d0 100644
--- a/meta-yocto/conf/site.conf.sample
+++ b/meta-yocto/conf/site.conf.sample
@@ -16,32 +16,15 @@ SCONF_VERSION = "1"
 #http-proxy-port = 81
 #
 
-# Uncomment to cause git to use the proxy host specificed 
-# although this only works for http
-#GIT_PROXY_HOST = "proxy.example.com"
-#GIT_PROXY_PORT = "81"
-#export GIT_PROXY_COMMAND = "${COREBASE}/scripts/oe-git-proxy-command"
-
-# Set to yes to have a gitconfig generated for handling proxies; you
-# might not want this if you have all that set in your global git
-# configuration. If you don't enable it, the rest of the entries
-# (_PROXY_IGNORE, etc) don't really work that well
-#GIT_CORE_CONFIG = "Yes"
-
-# Space separate list of hosts to ignore for GIT proxy
-#GIT_PROXY_IGNORE = "host.server.com another.server.com"
-
-# If SOCKS is available run the following command to comple a simple transport
-# gcc scripts/oe-git-proxy-socks.c -o oe-git-proxy-socks
-# and then share that binary somewhere in PATH, then use the following settings
-#GIT_PROXY_HOST = "proxy.example.com"
-#GIT_PROXY_PORT = "81"
-
-# GIT_PROXY_COMMAND is used by git to override all proxy settings from
-# configuration files, so we prefix OE_ to avoid breaking havoc on the
-# generated (or local) gitconfig's.
-#OE_GIT_PROXY_COMMAND = "${COREBASE}/scripts/oe-git-proxy-socks-command"
-
+# To use git with a proxy, you must use an external git proxy command, such as
+# the one provided by scripts/oe-git-proxy.sh. To use this script, copy it to
+# your PATH and uncomment the following:
+#GIT_PROXY_COMMAND="oe-git-proxy"
+#ALL_PROXY="socks://socks.example.com:1080"
+#or
+#ALL_PROXY="https://proxy.example.com:8080"
+# If you wish to use certain hosts without the proxy, specify them in NO_PROXY.
+# See the script for details on syntax.
 
 # Uncomment this to use a shared download directory
 #DL_DIR = "/some/shared/download/directory/"
-- 
1.7.5.4

[PATCH 6/7] oe-git-proxy*: Remove previous git proxy solutions

[Darren Hart]

The new oe-git-proxy should address all git proxying needs, remove
the previous scripts.

V2: Separate the removal of the old scripts into their own patch

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 scripts/oe-git-proxy-command       |   10 -
 scripts/oe-git-proxy-socks-command |   23 -
 scripts/oe-git-proxy-socks.c       | 2982 ------------------------------------
 3 files changed, 0 insertions(+), 3015 deletions(-)
 delete mode 100755 scripts/oe-git-proxy-command
 delete mode 100755 scripts/oe-git-proxy-socks-command
 delete mode 100755 scripts/oe-git-proxy-socks.c

diff --git a/scripts/oe-git-proxy-command b/scripts/oe-git-proxy-command
deleted file mode 100755
index d31f85a..0000000
--- a/scripts/oe-git-proxy-command
+++ /dev/null
@@ -1,10 +0,0 @@
-#! /bin/bash
-
-(echo "CONNECT $1:$2 HTTP/1.0"; 
- echo; 
- cat ) | nc $GIT_PROXY_HOST $GIT_PROXY_PORT | 
-  
-(read a; 
- read a; 
- read a; 
- cat )
\ No newline at end of file
diff --git a/scripts/oe-git-proxy-socks-command b/scripts/oe-git-proxy-socks-command
deleted file mode 100755
index 8acffb5..0000000
--- a/scripts/oe-git-proxy-socks-command
+++ /dev/null
@@ -1,23 +0,0 @@
-#! /bin/bash
-SCRIPTDIR=`dirname $0`
-# Check oe-git-proxy-socks exists
-PROXYSOCKS=`which oe-git-proxy-socks 2> /dev/null`
-if [ -z "$PROXYSOCKS" -a -e "$SCRIPTDIR/oe-git-proxy-socks.c" ]; then
-	# If not try and build it
-	gcc $SCRIPTDIR/oe-git-proxy-socks.c -o $SCRIPTDIR/oe-git-proxy-socks
-fi
-PROXYSOCKS=`which oe-git-proxy-socks 2> /dev/null`
-if [ ! -x "$PROXYSOCKS" ]; then
-	# If that fails, we can see if netcat (nc) is available
-	NETCAT=`which nc 2> /dev/null`
-	if [ ! -x "$NETCAT" ]; then
-		# If that fails, explain to the user
-		echo "Unable to find oe-git-proxy-socks. This is usually created with the command"
-		echo "'gcc scripts/oe-git-proxy-socks.c -o scripts/oe-git-proxy-socks' which we tried"
-		echo "but it doesn't seem to have worked. Please compile the binary manually."
-		echo "Alternativly, install nc (netcat) on this machine."
-		exit 1
-	fi
-	exec $NETCAT -x $GIT_PROXY_HOST:$GIT_PROXY_PORT "$@"
-fi
-oe-git-proxy-socks -S $GIT_PROXY_HOST:$GIT_PROXY_PORT $@
diff --git a/scripts/oe-git-proxy-socks.c b/scripts/oe-git-proxy-socks.c
deleted file mode 100755
index f574711..0000000
--- a/scripts/oe-git-proxy-socks.c
+++ /dev/null
@@ -1,2982 +0,0 @@
-/***********************************************************************
- * connect.c -- Make socket connection using SOCKS4/5 and HTTP tunnel.
- *
- * Copyright (c) 2000-2006 Shun-ichi Goto
- * Copyright (c) 2002, J. Grant (English Corrections)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
- *
- * ---------------------------------------------------------
- * PROJECT:  My Test Program
- * AUTHOR:   Shun-ichi GOTO <gotoh@taiyo.co.jp>
- * CREATE:   Wed Jun 21, 2000
- * REVISION: $Revision: 100 $
- * ---------------------------------------------------------
- *
- * Getting Source
- * ==============
- *
- *   Recent version of 'connect.c' is available from
- *     http://www.taiyo.co.jp/~gotoh/ssh/connect.c
- *
- *   Related tool, ssh-askpass.exe (alternative ssh-askpass on UNIX)
- *   is available:
- *     http://www.taiyo.co.jp/~gotoh/ssh/ssh-askpass.exe.gz
- *
- *   See more detail:
- *     http://www.taiyo.co.jp/~gotoh/ssh/connect.html
- *
- * How To Compile
- * ==============
- *
- *  On UNIX environment:
- *      $ gcc connect.c -o connect
- *
- *  On SOLARIS:
- *      $ gcc -o connect -lresolv -lsocket -lnsl connect.c
- *
- *  on Win32 environment:
- *      $ cl connect.c wsock32.lib advapi32.lib
- *    or
- *      $ bcc32 connect.c wsock32.lib advapi32.lib
- *    or
- *      $ gcc connect.c -o connect
- *
- *  on Mac OS X environment:
- *      $ gcc connect.c -o connect -lresolv
- *    or
- *      $ gcc connect.c -o connect -DBIND_8_COMPAT=1
- *
- * How To Use
- * ==========
- *
- *   You can specify proxy method in an environment variable or in a
- *   command line option.
- *
- *   usage:  connect [-dnhst45] [-R resolve] [-p local-port] [-w sec]
- *                   [-H [user@]proxy-server[:port]]
- *                   [-S [user@]socks-server[:port]]
- *                   [-T proxy-server[:port]]
- *                   [-c telnet proxy command]
- *                   host port
- *
- *   "host" and "port" is for the target hostname and port-number to
- *   connect to.
- *
- *   The -H option specifys a hostname and port number of the http proxy
- *   server to relay. If port is omitted, 80 is used. You can specify this
- *   value in the environment variable HTTP_PROXY and pass the -h option
- *   to use it.
- *
- *   The -S option specifys the hostname and port number of the SOCKS
- *   server to relay.  Like -H, port number can be omitted and the default
- *   is 1080. You can also specify this value pair in the environment
- *   variable SOCKS5_SERVER and give the -s option to use it.
- *
- *   The '-4' and the '-5' options are for specifying SOCKS relaying and
- *   indicates protocol version to use. It is valid only when used with
- *   '-s' or '-S'. Default is '-5' (protocol version 5)
- *
- *   The '-R' option is for specifying method to resolve the
- *   hostname. Three keywords ("local", "remote", "both") or dot-notation
- *   IP address are acceptable.  The keyword "both" means, "Try local
- *   first, then remote". If a dot-notation IP address is specified, use
- *   this host as nameserver. The default is "remote" for SOCKS5 or
- *   "local" for others. On SOCKS4 protocol, remote resolving method
- *   ("remote" and "both") requires protocol 4a supported server.
- *
- *   The '-p' option will forward a local TCP port instead of using the
- *   standard input and output.
- *
- *   The '-P' option is same to '-p' except keep remote session. The
- *   program repeats waiting the port with holding remote session without
- *   disconnecting. To disconnect the remote session, send EOF to stdin or
- *   kill the program.
- *
- *   The '-w' option specifys timeout seconds for making connection with
- *   TARGET host.
- *
- *   The '-d' option is used for debug. If you fail to connect, use this
- *   and check request to and response from server.
- *
- *   You can omit the "port" argument when program name is special format
- *   containing port number itself. For example,
- *     $ ln -s connect connect-25
- *   means this connect-25 command is spcifying port number 25 already
- *   so you need not 2nd argument (and ignored if specified).
- *
- *   To use proxy, this example is for SOCKS5 connection to connect to
- *   'host' at port 25 via SOCKS5 server on 'firewall' host.
- *     $ connect -S firewall  host 25
- *   or
- *     $ SOCKS5_SERVER=firewall; export SOCKS5_SERVER
- *     $ connect -s host 25
- *
- *   For a HTTP-PROXY connection:
- *     $ connect -H proxy-server:8080  host 25
- *   or
- *     $ HTTP_PROXY=proxy-server:8080; export HTTP_PROXY
- *     $ connect -h host 25
- *   To forward a local port, for example to use ssh:
- *     $ connect -p 5550 -H proxy-server:8080  host 22
- *    ($ ssh -l user -p 5550 localhost )
- *
- * TIPS
- * ====
- *
- *   Connect.c doesn't have any configuration to specify the SOCKS server.
- *   If you are a mobile user, this limitation might bother you.  However,
- *   You can compile connect.c and link with other standard SOCKS library
- *   like the NEC SOCKS5 library or Dante. This means connect.c is
- *   socksified and uses a configration file like to other SOCKSified
- *   network commands and you can switch configuration file any time
- *   (ex. when ppp startup) that brings you switching of SOCKS server for
- *   connect.c in same way with other commands. For this case, you can
- *   write ~/.ssh/config like this:
- *
- *     ProxyCommand connect -n %h %p
- *
- * SOCKS5 authentication
- * =====================
- *
- *   Only USER/PASS authentication is supported.
- *
- * Proxy authentication
- * ====================
- *
- *   Only BASIC scheme is supported.
- *
- * Authentication informations
- * ===========================
- *
- *   User name for authentication is specifed by an environment variable
- *   or system login name.  And password is specified from environment
- *   variable or external program (specified in $SSH_ASKPASS) or tty.
- *
- *   Following environment variable is used for specifying user name.
- *     SOCKS: $SOCKS5_USER, $LOGNAME, $USER
- *     HTTP Proxy: $HTTP_PROXY_USER, $LOGNAME, $USER
- *
- * ssh-askpass support
- * ===================
-  *
- *   You can use ssh-askpass (came from OpenSSH or else) to specify
- *   password on graphical environment (X-Window or MS Windows). To use
- *   this, set program name to environment variable SSH_ASKPASS. On UNIX,
- *   X-Window must be required, so $DISPLAY environment variable is also
- *   needed.  On Win32 environment, $DISPLAY is not mentioned.
- *
- * Related Informations
- * ====================
- *
- *   SOCKS5 -- RFC 1928, RFC 1929, RFC 1961
- *             NEC SOCKS Reference Implementation is available from:
- *               http://www.socks.nec.com
- *             DeleGate version 5 or earlier can be SOCKS4 server,
- *             and version 6 can be SOCKS5 and SOCKS4 server.
- *             and version 7.7.0 or later can be SOCKS5 and SOCKS4a server.
- *               http://www.delegate.org/delegate/
- *
- *   HTTP-Proxy --
- *             Many http proxy servers supports this, but https should
- *             be allowed as configuration on your host.
- *             For example on DeleGate, you should add "https" to the
- *             "REMITTABLE" parameter to allow HTTP-Proxy like this:
- *               delegated -Pxxxx ...... REMITTABLE="+,https" ...
- *
- *  Hypertext Transfer Protocol -- HTTP/1.1  -- RFC 2616
- *  HTTP Authentication: Basic and Digest Access Authentication -- RFC 2617
- *             For proxy authentication, refer these documents.
- *
- ***********************************************************************/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <memory.h>
-#include <errno.h>
-#include <assert.h>
-#include <sys/types.h>
-#include <stdarg.h>
-#include <fcntl.h>
-#include <signal.h>
-
-#ifdef __CYGWIN32__
-#undef _WIN32
-#endif
-
-#ifdef _WIN32
-#include <windows.h>
-#include <winsock.h>
-#include <sys/stat.h>
-#include <io.h>
-#include <conio.h>
-#else /* !_WIN32 */
-#include <unistd.h>
-#include <pwd.h>
-#include <termios.h>
-#include <sys/time.h>
-#ifndef __hpux
-#include <sys/select.h>
-#endif /* __hpux */
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#if !defined(_WIN32) && !defined(__CYGWIN32__)
-#define WITH_RESOLVER 1
-#include <arpa/nameser.h>
-#include <resolv.h>
-#else  /* not ( not _WIN32 && not __CYGWIN32__) */
-#undef WITH_RESOLVER
-#endif /* not ( not _WIN32 && not __CYGWIN32__) */
-#endif /* !_WIN32 */
-
-#ifdef _WIN32
-#define ECONNRESET WSAECONNRESET
-#endif /* _WI32 */
-
-
-
-#ifndef LINT
-static char *vcid = "$Id: connect.c 100 2007-07-03 10:48:26Z gotoh $";
-#endif
-
-/* Microsoft Visual C/C++ has _snprintf() and _vsnprintf() */
-#ifdef _MSC_VER
-#define snprintf _snprintf
-#define vsnprintf _vsnprintf
-#endif
-
-/* consider Borland C */
-#ifdef __BORLANDC__
-#define _kbhit kbhit
-#define _setmode setmode
-#endif
-
-/* help message.
-   Win32 environment does not support -R option (vc and cygwin)
-   Win32 native compilers does not support -w option, yet (vc)
-*/
-static char *usage = "usage: %s [-dnhst45] [-p local-port]"
-#ifdef _WIN32
-#ifdef __CYGWIN32__
-"[-w timeout] \n"                               /* cygwin cannot -R */
-#else  /* not __CYGWIN32__ */
-" \n"                                           /* VC cannot -w nor -R  */
-#endif /* not __CYGWIN32__ */
-#else  /* not _WIN32 */
-/* help message for UNIX */
-"[-R resolve] [-w timeout] \n"
-#endif /* not _WIN32 */
-"          [-H proxy-server[:port]] [-S [user@]socks-server[:port]] \n"
-"          [-T proxy-server[:port]]\n"
-"          [-c telnet-proxy-command]\n"
-"          host port\n";
-
-/* name of this program */
-char *progname = NULL;
-char *progdesc = "connect --- simple relaying command via proxy.";
-char *rcs_revstr = "$Revision: 100 $";
-char *revstr = NULL;
-int major_version = 1;
-int minor_version = 0;
-
-/* set of character for strspn() */
-const char *digits    = "0123456789";
-const char *dotdigits = "0123456789.";
-
-/* options */
-int f_debug = 0;
-
-/* report flag to hide secure information */
-int f_report = 1;
-
-int connect_timeout = 0;
-
-/* local input type */
-#define LOCAL_STDIO     0
-#define LOCAL_SOCKET    1
-char *local_type_names[] = { "stdio", "socket" };
-int   local_type = LOCAL_STDIO;
-u_short local_port = 0;                         /* option 'p' */
-int f_hold_session = 0;                         /* option 'P' */
-
-char *telnet_command = "telnet %h %p";
-
-/* utiity types, pair holder of number and string */
-typedef struct {
-    int num;
-    const char *str;
-} LOOKUP_ITEM;
-
-/* relay method, server and port */
-#define METHOD_UNDECIDED 0
-#define METHOD_DIRECT    1
-#define METHOD_SOCKS     2
-#define METHOD_HTTP      3
-#define METHOD_TELNET    4
-char *method_names[] = { "UNDECIDED", "DIRECT", "SOCKS", "HTTP", "TELNET" };
-
-int   relay_method = METHOD_UNDECIDED;          /* relaying method */
-char *relay_host = NULL;                        /* hostname of relay server */
-u_short relay_port = 0;                         /* port of relay server */
-char *relay_user = NULL;                        /* user name for auth */
-
-/* destination target host and port */
-char *dest_host = NULL;
-struct sockaddr_in dest_addr;
-u_short dest_port = 0;
-
-/* informations for SOCKS */
-#define SOCKS5_REP_SUCCEEDED    0x00    /* succeeded */
-#define SOCKS5_REP_FAIL         0x01    /* general SOCKS serer failure */
-#define SOCKS5_REP_NALLOWED     0x02    /* connection not allowed by ruleset */
-#define SOCKS5_REP_NUNREACH     0x03    /* Network unreachable */
-#define SOCKS5_REP_HUNREACH     0x04    /* Host unreachable */
-#define SOCKS5_REP_REFUSED      0x05    /* connection refused */
-#define SOCKS5_REP_EXPIRED      0x06    /* TTL expired */
-#define SOCKS5_REP_CNOTSUP      0x07    /* Command not supported */
-#define SOCKS5_REP_ANOTSUP      0x08    /* Address not supported */
-#define SOCKS5_REP_INVADDR      0x09    /* Inalid address */
-
-LOOKUP_ITEM socks5_rep_names[] = {
-    { SOCKS5_REP_SUCCEEDED, "succeeded"},
-    { SOCKS5_REP_FAIL,      "general SOCKS server failure"},
-    { SOCKS5_REP_NALLOWED,  "connection not allowed by ruleset"},
-    { SOCKS5_REP_NUNREACH,  "Network unreachable"},
-    { SOCKS5_REP_HUNREACH,  "Host unreachable"},
-    { SOCKS5_REP_REFUSED,   "connection refused"},
-    { SOCKS5_REP_EXPIRED,   "TTL expired"},
-    { SOCKS5_REP_CNOTSUP,   "Command not supported"},
-    { SOCKS5_REP_ANOTSUP,   "Address not supported"},
-    { SOCKS5_REP_INVADDR,   "Invalid address"},
-    { -1, NULL }
-};
-
-/* SOCKS5 authentication methods */
-#define SOCKS5_AUTH_REJECT      0xFF    /* No acceptable auth method */
-#define SOCKS5_AUTH_NOAUTH      0x00    /* without authentication */
-#define SOCKS5_AUTH_GSSAPI      0x01    /* GSSAPI */
-#define SOCKS5_AUTH_USERPASS    0x02    /* User/Password */
-#define SOCKS5_AUTH_CHAP        0x03    /* Challenge-Handshake Auth Proto. */
-#define SOCKS5_AUTH_EAP         0x05    /* Extensible Authentication Proto. */
-#define SOCKS5_AUTH_MAF         0x08    /* Multi-Authentication Framework */
-
-#define SOCKS4_REP_SUCCEEDED    90      /* rquest granted (succeeded) */
-#define SOCKS4_REP_REJECTED     91      /* request rejected or failed */
-#define SOCKS4_REP_IDENT_FAIL   92      /* cannot connect identd */
-#define SOCKS4_REP_USERID       93      /* user id not matched */
-
-LOOKUP_ITEM socks4_rep_names[] = {
-    { SOCKS4_REP_SUCCEEDED,  "request granted (succeeded)"},
-    { SOCKS4_REP_REJECTED,   "request rejected or failed"},
-    { SOCKS4_REP_IDENT_FAIL, "cannot connect identd"},
-    { SOCKS4_REP_USERID,     "user id not matched"},
-    { -1, NULL }
-};
-
-#define RESOLVE_UNKNOWN 0
-#define RESOLVE_LOCAL   1
-#define RESOLVE_REMOTE  2
-#define RESOLVE_BOTH    3
-char *resolve_names[] = { "UNKNOWN", "LOCAL", "REMOTE", "BOTH" };
-
-int socks_version = 5;                          /* SOCKS protocol version */
-int socks_resolve = RESOLVE_UNKNOWN;
-struct sockaddr_in socks_ns;
-char *socks5_auth = NULL;
-
-/* Environment variable names */
-#define ENV_SOCKS_SERVER  "SOCKS_SERVER"        /* SOCKS server */
-#define ENV_SOCKS5_SERVER "SOCKS5_SERVER"
-#define ENV_SOCKS4_SERVER "SOCKS4_SERVER"
-
-#define ENV_SOCKS_RESOLVE  "SOCKS_RESOLVE"      /* resolve method */
-#define ENV_SOCKS5_RESOLVE "SOCKS5_RESOLVE"
-#define ENV_SOCKS4_RESOLVE "SOCKS4_RESOLVE"
-
-#define ENV_SOCKS5_USER     "SOCKS5_USER"       /* auth user for SOCKS5 */
-#define ENV_SOCKS4_USER     "SOCKS4_USER"       /* auth user for SOCKS4 */
-#define ENV_SOCKS_USER      "SOCKS_USER"        /* auth user for SOCKS */
-#define ENV_SOCKS5_PASSWD   "SOCKS5_PASSWD"     /* auth password for SOCKS5 */
-#define ENV_SOCKS5_PASSWORD "SOCKS5_PASSWORD"   /* old style */
-
-#define ENV_HTTP_PROXY          "HTTP_PROXY"    /* common env var */
-#define ENV_HTTP_PROXY_USER     "HTTP_PROXY_USER" /* auth user */
-#define ENV_HTTP_PROXY_PASSWORD "HTTP_PROXY_PASSWORD" /* auth password */
-
-#define ENV_TELNET_PROXY          "TELNET_PROXY"    /* common env var */
-
-#define ENV_CONNECT_USER     "CONNECT_USER"     /* default auth user name */
-#define ENV_CONNECT_PASSWORD "CONNECT_PASSWORD" /* default auth password */
-
-#define ENV_SOCKS_DIRECT   "SOCKS_DIRECT"       /* addr-list for non-proxy */
-#define ENV_SOCKS5_DIRECT  "SOCKS5_DIRECT"
-#define ENV_SOCKS4_DIRECT  "SOCKS4_DIRECT"
-#define ENV_HTTP_DIRECT    "HTTP_DIRECT"
-#define ENV_CONNECT_DIRECT "CONNECT_DIRECT"
-
-#define ENV_SOCKS5_AUTH "SOCKS5_AUTH"
-#define ENV_SSH_ASKPASS "SSH_ASKPASS"           /* askpass program */
-
-/* Prefix string of HTTP_PROXY */
-#define HTTP_PROXY_PREFIX "http://"
-#define PROXY_AUTH_NONE 0
-#define PROXY_AUTH_BASIC 1
-#define PROXY_AUTH_DIGEST 2
-int proxy_auth_type = PROXY_AUTH_NONE;
-
-/* reason of end repeating */
-#define REASON_UNK              -2
-#define REASON_ERROR            -1
-#define REASON_CLOSED_BY_LOCAL  0
-#define REASON_CLOSED_BY_REMOTE 1
-
-/* return value of relay start function. */
-#define START_ERROR -1
-#define START_OK     0
-#define START_RETRY  1
-
-/* socket related definitions */
-#ifndef _WIN32
-#define SOCKET int
-#endif
-#ifndef SOCKET_ERROR
-#define SOCKET_ERROR -1
-#endif
-
-#ifdef _WIN32
-#define socket_errno() WSAGetLastError()
-#else /* !_WIN32 */
-#define closesocket close
-#define socket_errno() (errno)
-#endif /* !_WIN32 */
-
-#ifdef _WIN32
-#define popen _popen
-#endif /* WIN32 */
-
-/* packet operation macro */
-#define PUT_BYTE(ptr,data) (*(unsigned char*)ptr = data)
-
-/* debug message output */
-void
-debug( const char *fmt, ... )
-{
-    va_list args;
-    if ( f_debug ) {
-        va_start( args, fmt );
-        fprintf(stderr, "DEBUG: ");
-        vfprintf( stderr, fmt, args );
-        va_end( args );
-    }
-}
-
-void
-debug_( const char *fmt, ... )                  /* without prefix */
-{
-    va_list args;
-    if ( f_debug ) {
-        va_start( args, fmt );
-        vfprintf( stderr, fmt, args );
-        va_end( args );
-    }
-}
-
-/* error message output */
-void
-error( const char *fmt, ... )
-{
-    va_list args;
-    va_start( args, fmt );
-    fprintf(stderr, "ERROR: ");
-    vfprintf( stderr, fmt, args );
-    va_end( args );
-}
-
-void
-fatal( const char *fmt, ... )
-{
-    va_list args;
-    va_start( args, fmt );
-    fprintf(stderr, "FATAL: ");
-    vfprintf( stderr, fmt, args );
-    va_end( args );
-    exit (EXIT_FAILURE);
-}
-
-
-void *
-xmalloc (size_t size)
-{
-    void *ret = malloc(size);
-    if (ret == NULL)
-	fatal("Cannot allocate memory: %d bytes.\n", size);
-    return ret;
-}
-
-char *
-downcase( char *str )
-{
-    char *buf = str;
-    while ( *buf ) {
-        if ( isupper(*buf) )
-            *buf += 'a'-'A';
-        buf++;
-    }
-    return str;                                 /* return converted arg */
-}
-
-char *
-expand_host_and_port (const char *fmt, const char *host, int port)
-{
-    const char *src;
-    char *buf, *dst, *ptr;
-    size_t len = strlen(fmt) + strlen(host) + 20;
-    buf = xmalloc (len);
-    dst = buf;
-    src = fmt;
-    
-    while (*src) {
-	if (*src == '%') {
-	    switch (src[1]) {
-	    case 'h':
-		strcpy (dst, host);
-		src += 2;
-		break;
-	    case 'p':
-		snprintf (dst, len, "%d", port);
-		src += 2;
-		break;
-	    default:
-		src ++;
-		break;
-	    }
-	    dst = buf + strlen (buf);
-	} else if (*src == '\\') {
-	    switch (src[1]) {
-	    case 'r':				/* CR */
-		*dst++ = '\r';
-		src += 2;
-		break;
-	    case 'n':				/* LF */
-		*dst++ = '\n';
-		src += 2;
-		break;
-	    case 't':				/* TAB */
-		*dst++ = '\t';
-		src += 2;
-		break;
-	    default:
-		src ++;
-		break;
-	    }
-	} else {
-	    /* usual */
-	    *dst++ = *src++;
-	}
-	*dst = '\0';
-    }
-    assert (strlen(buf) < len);
-    return buf;
-}
-
-
-int
-lookup_resolve( const char *str )
-{
-    char *buf = strdup( str );
-    int ret;
-
-    downcase( buf );
-    if ( strcmp( buf, "both" ) == 0 )
-        ret = RESOLVE_BOTH;
-    else if ( strcmp( buf, "remote" ) == 0 )
-        ret = RESOLVE_REMOTE;
-    else if ( strcmp( buf, "local" ) == 0 )
-        ret = RESOLVE_LOCAL;
-    else if ( strspn(buf, dotdigits) == strlen(buf) ) {
-#ifndef WITH_RESOLVER
-        fatal("Sorry, you can't specify to resolve the hostname with the -R option on Win32 environment.");
-#endif /* not WITH_RESOLVER */
-        ret = RESOLVE_LOCAL;                    /* this case is also 'local' */
-        socks_ns.sin_addr.s_addr = inet_addr(buf);
-        socks_ns.sin_family = AF_INET;
-    }
-    else
-        ret = RESOLVE_UNKNOWN;
-    free(buf);
-    return ret;
-}
-
-char *
-getusername(void)
-{
-#ifdef _WIN32
-    static char buf[1024];
-    DWORD size = sizeof(buf);
-    buf[0] = '\0';
-    GetUserName( buf, &size);
-    return buf;
-#else  /* not _WIN32 */
-    struct passwd *pw = getpwuid(getuid());
-    if ( pw == NULL )
-        fatal("getpwuid() failed for uid: %d\n", getuid());
-    return pw->pw_name;
-#endif /* not _WIN32 */
-}
-
-/* expect
-   check STR is begin with substr with case-ignored comparison.
-   Return 1 if matched, otherwise 0.
-*/
-int
-expect( char *str, char *substr)
-{
-    int len = strlen(substr);
-    while ( 0 < len-- ) {
-        if ( toupper(*str) != toupper(*substr) )
-            return 0;                           /* not matched */
-        str++, substr++;
-    }
-    return 1;                   /* good, matched */
-}
-
-
-/** PARAMETER operation **/
-#define PARAMETER_FILE "/etc/connectrc"
-#define PARAMETER_DOTFILE ".connectrc"
-typedef struct {
-    char* name;
-    char* value;
-} PARAMETER_ITEM;
-PARAMETER_ITEM parameter_table[] = {
-    { ENV_SOCKS_SERVER, NULL },
-    { ENV_SOCKS5_SERVER, NULL },
-    { ENV_SOCKS4_SERVER, NULL },
-    { ENV_SOCKS_RESOLVE, NULL },
-    { ENV_SOCKS5_RESOLVE, NULL },
-    { ENV_SOCKS4_RESOLVE, NULL },
-    { ENV_SOCKS5_USER, NULL },
-    { ENV_SOCKS5_PASSWD, NULL },
-    { ENV_SOCKS5_PASSWORD, NULL },
-    { ENV_HTTP_PROXY, NULL },
-    { ENV_HTTP_PROXY_USER, NULL },
-    { ENV_HTTP_PROXY_PASSWORD, NULL },
-    { ENV_CONNECT_USER, NULL },
-    { ENV_CONNECT_PASSWORD, NULL },
-    { ENV_SSH_ASKPASS, NULL },
-    { ENV_SOCKS5_DIRECT, NULL },
-    { ENV_SOCKS4_DIRECT, NULL },
-    { ENV_SOCKS_DIRECT, NULL },
-    { ENV_HTTP_DIRECT, NULL },
-    { ENV_CONNECT_DIRECT, NULL },
-    { ENV_SOCKS5_AUTH, NULL },
-    { NULL, NULL }
-};
-
-PARAMETER_ITEM*
-find_parameter_item(const char* name)
-{
-    int i;
-    for( i = 0; parameter_table[i].name != NULL; i++ ){
-        if ( strcmp(name, parameter_table[i].name) == 0 )
-            return &parameter_table[i];
-    }
-    return NULL;
-}
-
-void
-read_parameter_file_1(const char* name)
-{
-    FILE* f;
-    int line;
-    char lbuf[1025];
-    f = fopen(name, "r");
-    if( f ){
-        debug("Reading parameter file(%s)\n", name);
-        for ( line = 1; fgets(lbuf, 1024, f); line++ ) {
-            char *p, *q, *param, *value;
-            p = strchr(lbuf, '\n');
-            if ( p == NULL )
-                fatal("%s:%d: buffer overflow\n", name, line);
-            *p = '\0';
-            p = strchr(lbuf, '#');
-            if ( p )
-                *p = '\0';
-            for ( p = lbuf; *p; p++ )
-                if( *p != ' ' && *p != '\t' ) break;
-            if ( *p == '\0' ) continue;
-            param = p;
-            p = strchr(p, '=');
-            if ( p == NULL ) {
-                error("%s:%d: missing equal sign\n", name, line);
-                continue;
-            }
-            for ( q = p - 1; q >= lbuf; q-- )
-                if ( *q != ' ' && *q != '\t' ) break;
-            *++q = '\0';
-            for ( ++p; *p; p++ )
-                if ( *p != ' ' && *p != '\t' ) break;
-            value = p;
-            for ( ; *p; p++ );
-            for ( p--; p >= lbuf; p-- )
-                if ( *p != ' ' && *p != '\t' ) break;
-            *++p = '\0';
-            if ( param && value ) {
-                PARAMETER_ITEM *item;
-                item = find_parameter_item(param);
-                if ( item == NULL ) {
-                    error("%s:%d: unknown parameter `%s'\n", name, line, param);
-                    continue;
-                }
-                item->value = strdup(value);
-                debug("Parameter `%s' is set to `%s'\n", param, value);
-            }
-        }
-    }
-}
-
-void
-read_parameter_file(void)
-{
-#if !defined(_WIN32) || defined(cygwin)
-    char *name;
-    struct passwd *pw;
-#endif
-
-    read_parameter_file_1(PARAMETER_FILE);
-#if !defined(_WIN32) || defined(cygwin)
-    pw = getpwuid(getuid());
-    if ( pw == NULL )
-        fatal("getpwuid() failed for uid: %d\n", getuid());
-    name = xmalloc(strlen(pw->pw_dir) + strlen(PARAMETER_DOTFILE) + 2);
-    strcpy(name, pw->pw_dir);
-    strcat(name, "/" PARAMETER_DOTFILE);
-    read_parameter_file_1(name);
-    free(name);
-#endif /* _WIN32 */
-}
-
-char*
-getparam(const char* name)
-{
-    char *value = getenv(name);
-    if ( value == NULL ){
-        PARAMETER_ITEM *item = find_parameter_item(name);
-        if ( item != NULL )
-            value = item->value;
-    }
-    return value;
-}
-
-
-/** DIRECT connection **/
-#define MAX_DIRECT_ADDR_LIST 256
-
-struct ADDRPAIR {
-    struct in_addr addr;
-    struct in_addr mask;
-    char *name;
-    int negative;
-};
-
-struct ADDRPAIR direct_addr_list[MAX_DIRECT_ADDR_LIST];
-int n_direct_addr_list = 0;
-
-void
-mask_addr (void *addr, void *mask, int addrlen)
-{
-    char *a, *m;
-    a = addr;
-    m = mask;
-    while ( 0 < addrlen-- )
-        *a++ &= *m++;
-}
-
-int
-add_direct_addr (struct in_addr *addr, struct in_addr *mask, int negative)
-{
-    struct in_addr iaddr;
-    char *s;
-    if ( MAX_DIRECT_ADDR_LIST <= n_direct_addr_list ) {
-        error("direct address table is full!\n");
-        return -1;
-    }
-    iaddr = *addr;
-    mask_addr(&iaddr, mask, sizeof(iaddr));
-    s = strdup(inet_ntoa(iaddr));
-    debug("adding direct addr entry: %s%s/%s\n",
-          negative? "!": "", s, inet_ntoa(*mask));
-    free(s);
-    memcpy( &direct_addr_list[n_direct_addr_list].addr,
-            &iaddr, sizeof(iaddr));
-    memcpy( &direct_addr_list[n_direct_addr_list].mask,
-            mask, sizeof(*mask));
-    direct_addr_list[n_direct_addr_list].name = NULL;
-    direct_addr_list[n_direct_addr_list].negative = negative;
-    n_direct_addr_list++;
-    return 0;
-}
-
-
-/* add domain/host name entry to direct name table */
-int
-add_direct_host( const char *name, int negative)
-{
-    if ( MAX_DIRECT_ADDR_LIST <= n_direct_addr_list ) {
-        error("direct address table is full!\n");
-        return -1;
-    }
-    if (*name == '*')
-        name++;
-    if (*name == '.')
-        name++;
-    debug("adding direct name entry: %s%s\n", negative? "!": "", name);
-    direct_addr_list[n_direct_addr_list].name = downcase(strdup(name));
-    direct_addr_list[n_direct_addr_list].negative = negative;
-    n_direct_addr_list++;
-    return 0;
-}
-
-
-int
-parse_addr_pair (const char *str, struct in_addr *addr, struct in_addr *mask)
-{
-    /* NOTE: */
-    /* Assume already be splitted by separator
-       and formatted as folowing:
-       1)  12.34.56.789/255.255.255.0
-       2)  12.34.56.789/24
-       3)  12.34.56.
-       All above generates same addr/mask pair 12.34.56.0 and 255.255.255.0
-    */
-    const char *ptr;
-    u_char *dsta, *dstm;
-    int i, n;
-
-    assert( str != NULL );
-    addr->s_addr = 0;
-    mask->s_addr = 0;
-    ptr = str;
-    dsta = (u_char*)&addr->s_addr;
-    dstm = (u_char*)&mask->s_addr;
-    for (i=0; i<4; i++ ) {
-        if ( *ptr == '\0' )
-            break;              /* case of format #3 */
-        if ( !isdigit(*ptr) )
-            return -1;          /* format error: */
-        *dsta++ = atoi( ptr );
-        *dstm++ = 255;          /* automatic mask for format #3 */
-        while ( isdigit(*ptr) ) /* skip digits */
-            ptr++;
-        if ( *ptr == '.' )
-            ptr++;
-        else
-            break;
-    }
-    /* At this point, *ptr points '/' or EOS ('\0') */
-    if ( *ptr == '\0' )
-        return 0;                       /* complete as format #3 */
-    if ( *ptr != '/' )
-        return -1;                      /* format error */
-    /* Now parse mask for format #1 or #2 */
-    ptr++;
-    mask->s_addr = 0;                   /* clear automatic mask */
-
-    if ( strchr( ptr, '.') ) {
-        /* case of format #1 */
-        dstm = (u_char*)&mask->s_addr;
-        for (i=0; i<4; i++) {
-            if ( !isdigit(*ptr) )
-                return -1;              /* format error: */
-            *dstm++ = atoi(ptr);
-            while ( isdigit(*ptr) )     /* skip digits */
-                ptr++;
-            if ( *ptr == '.' )
-                ptr++;
-            else
-                break;                  /* from for loop */
-        }
-        /* complete as format #1 */
-    } else {
-        /* case of format #2 */
-        if ( !isdigit(*ptr) )
-            return -1;                  /* format error: */
-        n = atoi(ptr);
-        if ( n<0 || 32<n)
-            return -1;                  /* format error */
-        mask->s_addr = (n==0)? 0: htonl(((u_long)0xFFFFFFFF)<<(32-n));
-        /* complete as format #1 */
-    }
-    return 0;
-}
-
-void
-initialize_direct_addr (void)
-{
-    int negative;
-    int n_entries;
-    char *env = NULL, *beg, *next, *envkey = NULL;
-    struct in_addr addr, mask;
-
-    if ( relay_method == METHOD_SOCKS ){
-        if ( socks_version == 5 )
-            envkey = ENV_SOCKS5_DIRECT;
-        else
-            envkey = ENV_SOCKS4_DIRECT;
-        env = getparam(envkey);
-        if ( env == NULL )
-            env = getparam(ENV_SOCKS_DIRECT);
-    } else if ( relay_method == METHOD_HTTP ){
-        env = getparam(ENV_HTTP_DIRECT);
-    }
-
-    if ( env == NULL )
-        env = getparam(ENV_CONNECT_DIRECT);
-
-    if ( env == NULL )
-        return;                 /* no entry */
-    debug("making direct addr list from: '%s'\n", env);
-    env = strdup( env );        /* reallocate to modify */
-    beg = next = env;
-    n_entries = 0;
-    do {
-        if ( MAX_DIRECT_ADDR_LIST <= n_entries ) {
-            error("too many entries in %s", envkey);
-            break;              /* from do loop */
-        }
-        next = strchr( beg, ',');
-        if ( next != NULL )
-            *next++ = '\0';
-        addr.s_addr = 0;
-        mask.s_addr = 0;
-        if (*beg == '!') {
-            negative = 1;
-            beg++;
-        } else
-            negative = 0;
-        if ( !parse_addr_pair( beg, &addr, &mask ) ) {
-            add_direct_addr( &addr, &mask, negative );
-        } else {
-            add_direct_host( beg, negative );
-        }
-        if ( next != NULL )
-            beg = next;
-    } while ( next != NULL );
-
-    free( env );
-    return;
-}
-
-int
-cmp_addr (void *addr1, void *addr2, int addrlen)
-{
-    return memcmp( addr1, addr2, addrlen );
-}
-
-int
-is_direct_address (const struct in_addr addr)
-{
-    int i, neg;
-    struct in_addr iaddr;
-
-    /* Note: assume IPV4 address !! */
-    for (i=0; i<n_direct_addr_list; i++ ) {
-        if (direct_addr_list[i].name != NULL)
-            continue;                           /* it's name entry */
-        neg = direct_addr_list[i].negative;
-        iaddr = addr;
-        mask_addr( &iaddr, &direct_addr_list[i].mask,
-                   sizeof(struct in_addr));
-        if (cmp_addr(&iaddr, &direct_addr_list[i].addr,
-                     sizeof(struct in_addr)) == 0) {
-            char *a, *m;
-            a = strdup(inet_ntoa(direct_addr_list[i].addr));
-            m = strdup(inet_ntoa(direct_addr_list[i].mask));
-            debug("match with: %s/%s%s\n", a, m, neg? " (negative)": "");
-            free(a);
-            free(m);
-            return !neg? 1: 0;
-        }
-    }
-    debug("not matched, addr to be relayed: %s\n", inet_ntoa(addr));
-    return 0;                   /* not direct */
-}
-
-
-/* check s1 is ends with s2.
-   return 1 if exact match or domain part match.
-   return 0 if s1 is shorter than s2 or partial match.
-   For example, 
-    ends_with("bar.com", "bar.com")        => 1 (exact match)
-    ends_with("foo.bar.com", "bar.com")    => 1 (domain match)
-    ends_with("foo.beebar.com", "bar.com") => 0 (partial match)
-    ends_with("bar", "bar.com")            => 0 (shorter)
- */
-domain_match(const char *s1, const char *s2)
-{
-    int len1, len2;
-    const char *tail1, *tail2;
-    len1 = strlen(s1);
-    len2 = strlen(s2);
-    if (len1 < len2 || len1 == 0 || len2 == 0)
-        return 0;                               /* not match */
-    tail1 = s1 + len1;
-    tail2 = s2 + len2;
-    while (0 < len1 && 0 < len2) {
-        if (*--tail1 != *--tail2)
-            break;                              /* not match */
-        len1--, len2--;
-    }
-    if (len2 != 0)
-        return 0;                               /* not match */
-    /* Now exact match, domain match or partial match.
-       Return true if exact or domain match.
-       Or continue checking. */
-    if (tail1 == s1 || tail1[-1] == '.')
-        return 1;                               /* match! */
-    return 0;                                   /* not match */
-}
-
-/* Check given NAME is ends with one of 
-   registered direct name entry.
-   Return 1 if matched, or 0.
-*/
-int
-is_direct_name (const char *name)
-{
-    int len, i;
-    const char *tail;
-    debug("checking %s is for direct?\n", name);
-    name = downcase(strdup(name));
-    len = strlen(name);
-    if (len < 1)
-        return 0;                               /* false */
-    tail = &name[len];
-    for (i=0; i<n_direct_addr_list; i++ ) {
-        int dlen, neg;
-        const char *dname;
-        const char *n, *d;
-        dname = direct_addr_list[i].name;
-        if (dname == NULL)
-            continue;                           /* it's addr/mask entry */
-        neg = direct_addr_list[i].negative;
-        if (domain_match(name, dname)) {
-            debug("match with: %s%s\n", dname, neg? " (negative)": "");
-            if (neg) {
-                return 0;       /* not direct */
-            } else {
-                return 1;       /* direct*/
-            }
-        }
-    }
-    return 0;                                   /* not matched */
-}
-
-/* check to connect to HOST directyly?
-   return 1 if to be direct, 0 for else. */
-int
-check_direct(const char *host)
-{
-    struct in_addr addr;
-    addr.s_addr = inet_addr(host);
-    if (addr.s_addr != INADDR_NONE) {
-        /* case of IP address */
-        if (is_direct_address(addr)) {
-            debug("%s is for direct.\n", host);
-            return 1;                           /* true */
-        }
-    } else {
-        /* case of hostname */
-        if (is_direct_name(host)) {
-            debug("%s is for direct.\n", host);
-            return 1;                           /* true */
-        }
-    }
-    debug("%s is for not direct.\n", host);
-    return 0;                                    /* false */
-}
-
-
-/** TTY operation **/
-
-int intr_flag = 0;
-
-#ifndef _WIN32
-void
-intr_handler(int sig)
-{
-    intr_flag = 1;
-}
-
-void
-tty_change_echo(int fd, int enable)
-{
-    static struct termios ntio, otio;           /* new/old termios */
-    static sigset_t nset, oset;                 /* new/old sigset */
-    static struct sigaction nsa, osa;           /* new/old sigaction */
-    static int disabled = 0;
-
-    if ( disabled && enable ) {
-        /* enable echo */
-        tcsetattr(fd, TCSANOW, &otio);
-        disabled = 0;
-        /* resotore sigaction */
-        sigprocmask(SIG_SETMASK, &oset, NULL);
-        sigaction(SIGINT, &osa, NULL);
-        if ( intr_flag != 0 ) {
-            /* re-generate signal  */
-            kill(getpid(), SIGINT);
-            sigemptyset(&nset);
-            sigsuspend(&nset);
-            intr_flag = 0;
-        }
-    } else if (!disabled && !enable) {
-        /* set SIGINTR handler and break syscall on singal */
-        sigemptyset(&nset);
-        sigaddset(&nset, SIGTSTP);
-        sigprocmask(SIG_BLOCK, &nset, &oset);
-        intr_flag = 0;
-        memset(&nsa, 0, sizeof(nsa));
-        nsa.sa_handler = intr_handler;
-        sigaction(SIGINT, &nsa, &osa);
-        /* disable echo */
-        if (tcgetattr(fd, &otio) == 0 && (otio.c_lflag & ECHO)) {
-            disabled = 1;
-            ntio = otio;
-            ntio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
-            (void) tcsetattr(fd, TCSANOW, &ntio);
-        }
-    }
-
-    return;
-}
-
-#define TTY_NAME "/dev/tty"
-int
-tty_readpass( const char *prompt, char *buf, size_t size )
-{
-    int tty, ret = 0;
-
-    tty = open(TTY_NAME, O_RDWR);
-    if ( tty < 0 ) {
-        error("Unable to open %s\n", TTY_NAME);
-        return -1;                              /* can't open tty */
-    }
-    if ( size <= 0 )
-        return -1;                              /* no room */
-    write(tty, prompt, strlen(prompt));
-    buf[0] = '\0';
-    tty_change_echo(tty, 0);                    /* disable echo */
-    ret = read(tty,buf, size-1);
-    tty_change_echo(tty, 1);                    /* restore */
-    write(tty, "\n", 1);                        /* new line */
-    close(tty);
-    if ( strchr(buf,'\n') == NULL  )
-        return -1;
-    if ( 0 < ret )
-        buf[ret] = '\0';
-    return ret;
-}
-
-#else  /* _WIN32 */
-
-BOOL __stdcall
-w32_intr_handler(DWORD dwCtrlType)
-{
-    if ( dwCtrlType == CTRL_C_EVENT ) {
-        intr_flag = 1;
-        return TRUE;
-    } else {
-        return FALSE;
-    }
-}
-
-#define tty_readpass w32_tty_readpass
-int
-w32_tty_readpass( const char *prompt, char *buf, size_t size )
-{
-    HANDLE in = CreateFile("CONIN$", GENERIC_READ|GENERIC_WRITE,
-                           0, NULL, OPEN_EXISTING, 0, NULL);
-    HANDLE out = CreateFile("CONOUT$", GENERIC_WRITE,
-                            0, NULL, OPEN_EXISTING, 0, NULL);
-    DWORD mode;
-    DWORD ret, bytes;
-
-    if (in == INVALID_HANDLE_VALUE || out == INVALID_HANDLE_VALUE)
-        fatal("Cannot open console. (errno=%d)", GetLastError());
-
-    WriteFile(out, prompt, strlen(prompt), &bytes, 0);
-    SetConsoleCtrlHandler(w32_intr_handler, TRUE ); /* add handler */
-    GetConsoleMode(in, &mode);
-    SetConsoleMode(in, mode&~ENABLE_ECHO_INPUT); /* disable echo */
-    ret = ReadFile(in, buf, size, &bytes, 0);
-    SetConsoleMode(in, mode);                   /* enable echo */
-    SetConsoleCtrlHandler( w32_intr_handler, FALSE ); /* remove handler */
-    if ( intr_flag )
-        GenerateConsoleCtrlEvent(CTRL_C_EVENT, 0); /* re-signal */
-    WriteFile(out,"\n", 1, &bytes, 0);
-    CloseHandle(in);
-    CloseHandle(out);
-    return ret;
-}
-
-#endif /* _WIN32 */
-
-/*** User / Password ***/
-
-/* SOCKS5 and HTTP Proxy authentication may requires username and
-   password. We ll give it via environment variable or tty.
-   Username and password for authentication are decided by
-   following rules:
-
-   Username is taken from
-     1) server location spec (i.e. user@host:port)
-     2) environment variables (see tables.1)
-     3) system account name currently logged in.
-
-     Table.1 Order of environment variables for username
-
-        |  SOCKS v5   |  SOCKS v4   |   HTTP proxy    |
-      --+-------------+-------------+-----------------+
-      1 | SOCKS45_USER | SOCKS4_USER | HTTP_PROXY_USER |
-      --+-------------+-------------+                 |
-      2 |        SOCKS_USER         |                 |
-      --+---------------------------+-----------------+
-      3 |              CONNECT_USER                   |
-      --+---------------------------------------------+
-
-   Password is taken from
-     1) by environment variables (see table.2)
-     2) by entering from tty.
-
-     Table.2 Order of environment variables for password
-
-        |    SOCKS v5     |     HTTP proxy      |
-      --+-----------------+---------------------+
-      1 | SOCKS5_PASSWD   |                     |
-      --+-----------------+ HTTP_PROXY_PASSWORD |
-      2 | SOCKS5_PASSWORD |                     |
-      --+-----------------+---------------------+
-      3 |           CONNECT_PASSWORD            |
-      --+---------------------------------------+
-
-      Note: SOCKS5_PASSWD which is added in rev. 1.79
-            to share value with NEC SOCKS implementation.
- */
-
-char *
-determine_relay_user ()
-{
-    char *user = NULL;
-    /* get username from environment variable, or system. */
-    if (relay_method == METHOD_SOCKS) {
-        if (user == NULL && socks_version == 5)
-            user = getparam (ENV_SOCKS5_USER);
-        if (user == NULL && socks_version == 4)
-            user = getparam (ENV_SOCKS4_USER);
-        if (user == NULL)
-            user = getparam (ENV_SOCKS_USER);
-    } else if (relay_method == METHOD_HTTP) {
-        if (user == NULL)
-            user = getparam (ENV_HTTP_PROXY_USER);
-    }
-    if (user == NULL)
-        user = getparam (ENV_CONNECT_USER);
-    /* determine relay user by system call if not yet. */
-    if (user == NULL)
-        user = getusername();
-    return user;
-}
-
-char *
-determine_relay_password ()
-{
-    char *pass = NULL;
-    if (pass == NULL && relay_method == METHOD_HTTP)
-        pass = getparam(ENV_HTTP_PROXY_PASSWORD);
-    if (pass == NULL && relay_method == METHOD_SOCKS)
-        pass = getparam(ENV_SOCKS5_PASSWD);
-    if (pass == NULL && relay_method == METHOD_SOCKS)
-        pass = getparam(ENV_SOCKS5_PASSWORD);
-    if (pass == NULL)
-        pass = getparam(ENV_CONNECT_PASSWORD);
-    return pass;
-}
-
-
-/*** network operations ***/
-
-
-/* set_relay()
-   Determine relay informations:
-   method, host, port, and username.
-   1st arg, METHOD should be METHOD_xxx.
-   2nd arg, SPEC is hostname or hostname:port or user@hostame:port.
-   hostname is domain name or dot notation.
-   If port is omitted, use 80 for METHOD_HTTP method,
-   use 1080 for METHOD_SOCKS method.
-   Username is also able to given by 3rd. format.
-   2nd argument SPEC can be NULL. if NULL, use environment variable.
- */
-int
-set_relay( int method, char *spec )
-{
-    char *buf, *sep, *resolve;
-
-    relay_method = method;
-
-    read_parameter_file();
-    initialize_direct_addr();
-    if (n_direct_addr_list == 0) {
-        debug ("No direct address are specified.\n");
-    } else {
-        debug ("%d direct address entries.\n", n_direct_addr_list);
-    }
-
-    switch ( method ) {
-    case METHOD_DIRECT:
-        return -1;                              /* nothing to do */
-
-    case METHOD_SOCKS:
-        if ( spec == NULL ) {
-            switch ( socks_version ) {
-            case 5:
-                spec = getparam(ENV_SOCKS5_SERVER);
-                break;
-            case 4:
-                spec = getparam(ENV_SOCKS4_SERVER);
-                break;
-            }
-        }
-        if ( spec == NULL )
-            spec = getparam(ENV_SOCKS_SERVER);
-
-        if ( spec == NULL )
-            fatal("Failed to determine SOCKS server.\n");
-        relay_port = 1080;                      /* set default first */
-
-        /* determine resolve method */
-        if ( socks_resolve == RESOLVE_UNKNOWN ) {
-            if ( ((socks_version == 5) &&
-                  ((resolve = getparam(ENV_SOCKS5_RESOLVE)) != NULL)) ||
-                 ((socks_version == 4) &&
-                  ((resolve = getparam(ENV_SOCKS4_RESOLVE)) != NULL)) ||
-                 ((resolve = getparam(ENV_SOCKS_RESOLVE)) != NULL) ) {
-                socks_resolve = lookup_resolve( resolve );
-                if ( socks_resolve == RESOLVE_UNKNOWN )
-                    fatal("Invalid resolve method: %s\n", resolve);
-            } else {
-                /* default */
-                if ( socks_version == 5 )
-                    socks_resolve = RESOLVE_REMOTE;
-                else
-                    socks_resolve = RESOLVE_LOCAL;
-            }
-        }
-        break;
-
-    case METHOD_HTTP:
-        if ( spec == NULL )
-            spec = getparam(ENV_HTTP_PROXY);
-        if ( spec == NULL )
-            fatal("You must specify http proxy server\n");
-        relay_port = 80;                        /* set default first */
-        break;
-    case METHOD_TELNET:
-        if ( spec == NULL )
-            spec = getparam(ENV_TELNET_PROXY);
-        if ( spec == NULL )
-            fatal("You must specify telnet proxy server\n");
-        relay_port = 23;                        /* set default first */
-    }
-
-    if (expect( spec, HTTP_PROXY_PREFIX)) {
-        /* URL format like: "http://server:port/" */
-        /* extract server:port part */
-        buf = strdup( spec + strlen(HTTP_PROXY_PREFIX));
-        buf[strcspn(buf, "/")] = '\0';
-    } else {
-        /* assume spec is aready "server:port" format */
-        buf = strdup( spec );
-    }
-    spec = buf;
-
-    /* check username in spec */
-    sep = strchr( spec, '@' );
-    if ( sep != NULL ) {
-        *sep = '\0';
-        relay_user = strdup( spec );
-        spec = sep +1;
-    }
-    if (relay_user == NULL)
-        relay_user = determine_relay_user();
-
-    /* split out hostname and port number from spec */
-    sep = strchr(spec,':');
-    if ( sep == NULL ) {
-        /* hostname only, port is already set as default */
-        relay_host = strdup( spec );
-    } else {
-        /* hostname and port */
-        relay_port = atoi(sep+1);
-        *sep = '\0';
-        relay_host = strdup( spec );
-    }
-    free(buf);
-    return 0;
-}
-
-
-u_short
-resolve_port( const char *service )
-{
-    int port;
-    if ( service[strspn (service, digits)] == '\0'  ) {
-        /* all digits, port number */
-        port = atoi(service);
-    } else {
-        /* treat as service name */
-        struct servent *ent;
-        ent = getservbyname( service, NULL );
-        if ( ent == NULL ) {
-            debug("Unknown service, '%s'\n", service);
-            port = 0;
-        } else {
-            port = ntohs(ent->s_port);
-            debug("service: %s => %d\n", service, port);
-        }
-    }
-    return (u_short)port;
-}
-
-void
-make_revstr(void)
-{
-    char *ptr;
-    size_t len;
-    ptr = strstr(rcs_revstr, ": ");
-    if (!ptr) {
-        revstr = strdup("unknown");
-        return;
-    }
-    ptr += 2;
-    /* assume subversion's keyword expansion like "Revision: 96". */
-    minor_version = atoi(ptr);
-    revstr = xmalloc(20);
-    snprintf(revstr, 20, "%d.%d", major_version, minor_version);
-}
-
-int
-getarg( int argc, char **argv )
-{
-    int err = 0;
-    char *ptr, *server = (char*)NULL;
-    int method = METHOD_DIRECT;
-
-    progname = *argv;
-    argc--, argv++;
-
-    /* check optinos */
-    while ( (0 < argc) && (**argv == '-') ) {
-        ptr = *argv + 1;
-        while ( *ptr ) {
-            switch ( *ptr ) {
-            case 's':                           /* use SOCKS */
-                method = METHOD_SOCKS;
-                break;
-
-            case 'n':                           /* no proxy */
-                method = METHOD_DIRECT;
-                break;
-
-            case 'h':                           /* use http-proxy */
-                method = METHOD_HTTP;
-                break;
-            case 't':
-                method = METHOD_TELNET;
-                break;
-
-            case 'S':                           /* specify SOCKS server */
-                if ( 1 < argc ) {
-                    argv++, argc--;
-                    method = METHOD_SOCKS;
-                    server = *argv;
-                } else {
-                    error("option '-%c' needs argument.\n", *ptr);
-                    err++;
-                }
-                break;
-
-            case 'H':                           /* specify http-proxy server */
-                if ( 1 < argc ) {
-                    argv++, argc--;
-                    method = METHOD_HTTP;
-                    server = *argv;
-                } else {
-                    error("option '-%c' needs argument.\n", *ptr);
-                    err++;
-                }
-                break;
-            case 'T':                           /* specify telnet proxy server */
-                if ( 1 < argc ) {
-                    argv++, argc--;
-                    method = METHOD_TELNET;
-                    server = *argv;
-                } else {
-                    error("option '-%c' needs argument.\n", *ptr);
-                    err++;
-                }
-                break;
-
-            case 'c':
-                 if (1 < argc) {
-                      argv++, argc--;
-                      telnet_command = *argv;
-                 } else {
-                      error("option '%c' needs argument.\n", *ptr);
-                      err++;
-                 }
-                 break;
-
-            case 'P':
-                f_hold_session = 1;
-                /* without break */
-            case 'p':                          /* specify port to forward */
-                if ( 1 < argc ) {
-                    argv++, argc--;
-                    local_type = LOCAL_SOCKET;
-                    local_port = resolve_port(*argv);
-                } else {
-                    error("option '-%c' needs argument.\n", *ptr);
-                    err++;
-                }
-                break;
-
-#ifndef _WIN32
-            case 'w':
-                if ( 1 < argc ) {
-                    argv++, argc--;
-                    connect_timeout = atoi(*argv);
-                } else {
-                    error("option '-%c' needs argument.\n", *ptr);
-                    err++;
-                }
-                break;
-#endif /* not _WIN32 */
-
-            case '4':
-                socks_version = 4;
-                break;
-
-            case '5':
-                socks_version = 5;
-                break;
-
-            case 'a':
-                if ( 1 < argc ) {
-                    argv++, argc--;
-                    socks5_auth = *argv;
-                } else {
-                    error("option '-%c' needs argument.\n", *ptr);
-                    err++;
-                }
-                break;
-
-            case 'R':                           /* specify resolve method */
-                if ( 1 < argc ) {
-                    argv++, argc--;
-                    socks_resolve = lookup_resolve( *argv );
-                } else {
-                    error("option '-%c' needs argument.\n", *ptr);
-                    err++;
-                }
-                break;
-
-            case 'V':                           /* print version */
-                fprintf(stderr, "%s\nVersion %s\n", progdesc, revstr);
-                exit(0);
-
-            case 'd':                           /* debug mode */
-                f_debug++;
-                break;
-
-            default:
-                error("unknown option '-%c'\n", *ptr);
-                err++;
-            }
-            ptr++;
-        }
-        argc--, argv++;
-    }
-
-    /* check error */
-    if ( 0 < err )
-        goto quit;
-
-    set_relay( method, server );
-
-    /* check destination HOST (MUST) */
-    if ( argc == 0  ) {
-        fprintf(stderr, "%s\nVersion %s\n", progdesc, revstr);
-        fprintf(stderr, usage, progname);
-        exit(0);
-    }
-    dest_host = argv[0];
-    /* decide port or service name from programname or argument */
-    if ( ((ptr=strrchr( progname, '/' )) != NULL) ||
-         ((ptr=strchr( progname, '\\')) != NULL) )
-        ptr++;
-    else
-        ptr = progname;
-    if ( dest_port == 0 ) {
-        /* accept only if -P is not specified. */
-        if ( 1 < argc ) {
-            /* get port number from argument (prior to progname) */
-            /* NOTE: This way is for cvs ext method. */
-            dest_port = resolve_port(argv[1]);
-        } else if ( strncmp( ptr, "connect-", 8) == 0 ) {
-            /* decide port number from program name */
-            char *str = strdup( ptr+8 );
-            str[strcspn( str, "." )] = '\0';
-            dest_port = resolve_port(str);
-            free(str);
-        }
-    }
-    /* check port number */
-    if ( dest_port <= 0 ) {
-        error( "You must specify the destination port correctly.\n");
-        err++;
-        goto quit;
-    }
-    if ( (relay_method != METHOD_DIRECT) && (relay_port <= 0) ) {
-        error("Invalid relay port: %d\n", dest_port);
-        err++;
-        goto quit;
-    }
-
-quit:
-    /* report for debugging */
-    debug("relay_method = %s (%d)\n",
-          method_names[relay_method], relay_method);
-    if ( relay_method != METHOD_DIRECT ) {
-        debug("relay_host=%s\n", relay_host);
-        debug("relay_port=%d\n", relay_port);
-        debug("relay_user=%s\n", relay_user);
-    }
-    if ( relay_method == METHOD_SOCKS ) {
-        debug("socks_version=%d\n", socks_version);
-        debug("socks_resolve=%s (%d)\n",
-              resolve_names[socks_resolve], socks_resolve);
-    }
-    debug("local_type=%s\n", local_type_names[local_type]);
-    if ( local_type == LOCAL_SOCKET ) {
-        debug("local_port=%d\n", local_port);
-        if (f_hold_session)
-            debug ("  with holding remote session.\n");
-    }
-    debug("dest_host=%s\n", dest_host);
-    debug("dest_port=%d\n", dest_port);
-    if ( 0 < err ) {
-        fprintf(stderr, usage, progname);
-        exit(1);
-    }
-    return 0;
-}
-
-#ifndef _WIN32
-/* Time-out feature is not allowed for Win32 native compilers. */
-/* MSVC and Borland C cannot but Cygwin and UNIXes can. */
-
-/* timeout signal hander */
-void
-sig_timeout(void)
-{
-    signal( SIGALRM, SIG_IGN );
-    alarm( 0 );
-    error( "timed out\n" );
-    exit(1);
-}
-
-/* set timeout param = seconds, 0 clears */
-void
-set_timeout(int timeout)
-{
-    /* This feature is allowed for UNIX or cygwin environments, currently */
-    if ( timeout == 0 ) {
-        debug( "clearing timeout\n" );
-        signal( SIGALRM, SIG_IGN );
-        alarm( 0 );
-    } else {
-        debug( "setting timeout: %d seconds\n", timeout );
-        signal(SIGALRM, (void *)sig_timeout);
-        alarm( timeout );
-    }
-}
-#endif
-
-#if !defined(_WIN32) && !defined(__CYGWIN32__)
-void
-switch_ns (struct sockaddr_in *ns)
-{
-    res_init();
-    memcpy (&_res.nsaddr_list[0], ns, sizeof(*ns));
-    _res.nscount = 1;
-    debug("Using nameserver at %s\n", inet_ntoa(ns->sin_addr));
-}
-#endif /* !_WIN32 && !__CYGWIN32__ */
-
-/* TODO: IPv6
-   TODO: fallback if askpass execution failed.
- */
-
-int
-local_resolve (const char *host, struct sockaddr_in *addr)
-{
-    struct hostent *ent;
-    if ( strspn(host, dotdigits) == strlen(host) ) {
-        /* given by IPv4 address */
-        addr->sin_family = AF_INET;
-        addr->sin_addr.s_addr = inet_addr(host);
-    } else {
-        debug("resolving host by name: %s\n", host);
-        ent = gethostbyname (host);
-        if ( ent ) {
-            memcpy (&addr->sin_addr, ent->h_addr, ent->h_length);
-            addr->sin_family = ent->h_addrtype;
-            debug("resolved: %s (%s)\n",
-                  host, inet_ntoa(addr->sin_addr));
-        } else {
-            debug("failed to resolve locally.\n");
-            return -1;                          /* failed */
-        }
-    }
-    return 0;                                   /* good */
-}
-
-int
-open_connection( const char *host, u_short port )
-{
-    SOCKET s;
-    struct sockaddr_in saddr;
-
-    /* resolve address of proxy or direct target */
-    if (local_resolve (host, &saddr) < 0) {
-        error("can't resolve hostname: %s\n", host);
-        return SOCKET_ERROR;
-    }
-    saddr.sin_port = htons(port);
-
-    debug("connecting to %s:%u\n", inet_ntoa(saddr.sin_addr), port);
-    s = socket( AF_INET, SOCK_STREAM, 0 );
-    if ( connect( s, (struct sockaddr *)&saddr, sizeof(saddr))
-         == SOCKET_ERROR) {
-        debug( "connect() failed.\n");
-        return SOCKET_ERROR;
-    }
-    return s;
-}
-
-void
-report_text( char *prefix, char *buf )
-{
-    static char work[1024];
-    char *tmp;
-
-    if ( !f_debug )
-        return;
-    if ( !f_report )
-        return;                                 /* don't report */
-    debug("%s \"", prefix);
-    while ( *buf ) {
-        memset( work, 0, sizeof(work));
-        tmp = work;
-        while ( *buf && ((tmp-work) < (int)sizeof(work)-5) ) {
-            switch ( *buf ) {
-            case '\t': *tmp++ = '\\'; *tmp++ = 't'; break;
-            case '\r': *tmp++ = '\\'; *tmp++ = 'r'; break;
-            case '\n': *tmp++ = '\\'; *tmp++ = 'n'; break;
-            case '\\': *tmp++ = '\\'; *tmp++ = '\\'; break;
-            default:
-                if ( isprint(*buf) ) {
-                    *tmp++ = *buf;
-                } else {
-		    int consumed = tmp - work;
-                    snprintf( tmp, sizeof(work)-consumed,
-			      "\\x%02X", (unsigned char)*buf);
-                    tmp += strlen(tmp);
-                }
-            }
-            buf++;
-            *tmp = '\0';
-        }
-        debug_("%s", work);
-    }
-
-    debug_("\"\n");
-}
-
-
-void
-report_bytes( char *prefix, char *buf, int len )
-{
-    if ( ! f_debug )
-        return;
-    debug( "%s", prefix );
-    while ( 0 < len ) {
-        fprintf( stderr, " %02x", *(unsigned char *)buf);
-        buf++;
-        len--;
-    }
-    fprintf(stderr, "\n");
-    return;
-}
-
-int
-atomic_out( SOCKET s, char *buf, int size )
-{
-    int ret, len;
-
-    assert( buf != NULL );
-    assert( 0<=size );
-    /* do atomic out */
-    ret = 0;
-    while ( 0 < size ) {
-        len = send( s, buf+ret, size, 0 );
-        if ( len == -1 )
-            fatal("atomic_out() failed to send(), %d\n", socket_errno());
-        ret += len;
-        size -= len;
-    }
-    if (!f_report) {
-        debug("atomic_out()  [some bytes]\n");
-        debug(">>> xx xx xx xx ...\n");
-    } else {
-        debug("atomic_out()  [%d bytes]\n", ret);
-        report_bytes(">>>", buf, ret);
-    }
-    return ret;
-}
-
-int
-atomic_in( SOCKET s, char *buf, int size )
-{
-    int ret, len;
-
-    assert( buf != NULL );
-    assert( 0<=size );
-
-    /* do atomic in */
-    ret = 0;
-    while ( 0 < size ) {
-        len = recv( s, buf+ret, size, 0 );
-        if ( len == -1 ) {
-            fatal("atomic_in() failed to recv(), %d\n", socket_errno());
-        } else if ( len == 0 ) {
-            fatal( "Connection closed by peer.\n");
-        }
-        ret += len;
-        size -= len;
-    }
-    if (!f_report) {
-        debug("atomic_in()  [some bytes]\n");
-        debug("<<< xx xx xx xx ...\n");
-    } else {
-        debug("atomic_in() [%d bytes]\n", ret);
-        report_bytes("<<<", buf, ret);
-    }
-    return ret;
-}
-
-int
-line_input( SOCKET s, char *buf, int size )
-{
-    char *dst = buf;
-    if ( size == 0 )
-        return 0;                               /* no error */
-    size--;
-    while ( 0 < size ) {
-        switch ( recv( s, dst, 1, 0) ) {        /* recv one-by-one */
-        case SOCKET_ERROR:
-            error("recv() error\n");
-            return -1;                          /* error */
-        case 0:
-            size = 0;                           /* end of stream */
-            break;
-        default:
-            /* continue reading until last 1 char is EOL? */
-            if ( *dst == '\n' ) {
-                /* finished */
-                size = 0;
-            } else {
-                /* more... */
-                size--;
-            }
-            dst++;
-        }
-    }
-    *dst = '\0';
-    report_text( "<<<", buf);
-    return 0;
-}
-
-/* cut_token()
-   Span token in given string STR until char in DELIM is appeared.
-   Then replace contiguous DELIMS with '\0' for string termination
-   and returns next pointer.
-   If no next token, return NULL.
-*/
-char *
-cut_token( char *str, char *delim)
-{
-    char *ptr = str + strcspn(str, delim);
-    char *end = ptr + strspn(ptr, delim);
-    if ( ptr == str )
-        return NULL;
-    while ( ptr < end )
-        *ptr++ = '\0';
-    return ptr;
-}
-
-const char *
-lookup(int num, LOOKUP_ITEM *items)
-{
-    int i = 0;
-    while (0 <= items[i].num) {
-        if (items[i].num == num)
-            return items[i].str;
-        i++;
-    }
-    return "(unknown)";
-}
-
-/* readpass()
-   password input routine
-   Use ssh-askpass (same mechanism to OpenSSH)
-*/
-char *
-readpass( const char* prompt, ...)
-{
-    static char buf[1000];                      /* XXX, don't be fix length */
-    va_list args;
-    va_start(args, prompt);
-    vsnprintf(buf, sizeof(buf), prompt, args);
-    va_end(args);
-
-    if ( getparam(ENV_SSH_ASKPASS)
-#if !defined(_WIN32) && !defined(__CYGWIN32__)
-         && getenv("DISPLAY")
-#endif /* not _WIN32 && not __CYGWIN32__ */
-        ) {
-        /* use ssh-askpass to get password */
-        FILE *fp;
-        char *askpass = getparam(ENV_SSH_ASKPASS), *cmd;
-	int cmd_size = strlen(askpass) +1 +1 +strlen(buf) +1 +1;
-        cmd = xmalloc(cmd_size);
-        snprintf(cmd, cmd_size, "%s \"%s\"", askpass, buf);
-        fp = popen(cmd, "r");
-        free(cmd);
-        if ( fp == NULL )
-            return NULL;                        /* fail */
-        buf[0] = '\0';
-        if (fgets(buf, sizeof(buf), fp) == NULL)
-            return NULL;                        /* fail */
-        fclose(fp);
-    } else {
-        tty_readpass( buf, buf, sizeof(buf));
-    }
-    buf[strcspn(buf, "\r\n")] = '\0';
-    return buf;
-}
-
-static int
-socks5_do_auth_userpass( int s )
-{
-    unsigned char buf[1024], *ptr;
-    char *pass = NULL;
-    int len;
-
-    /* do User/Password authentication. */
-    /* This feature requires username and password from
-       command line argument or environment variable,
-       or terminal. */
-    if (relay_user == NULL)
-        fatal("cannot determine user name.\n");
-
-    /* get password from environment variable if exists. */
-    if ((pass=determine_relay_password()) == NULL &&
-        (pass=readpass("Enter SOCKS5 password for %s@%s: ",
-                       relay_user, relay_host)) == NULL)
-        fatal("Cannot get password for user: %s\n", relay_user);
-
-    /* make authentication packet */
-    ptr = buf;
-    PUT_BYTE( ptr++, 1 );                       /* subnegotiation ver.: 1 */
-    len = strlen( relay_user );                 /* ULEN and UNAME */
-    PUT_BYTE( ptr++, len );
-    strcpy( ptr, relay_user );
-    ptr += len;
-    len = strlen( pass );                       /* PLEN and PASSWD */
-    PUT_BYTE( ptr++, strlen(pass));
-    strcpy( ptr, pass );
-    ptr += len;
-    memset (pass, 0, strlen(pass));             /* erase password */
-
-    /* send it and get answer */
-    f_report = 0;
-    atomic_out( s, buf, ptr-buf );
-    f_report = 1;
-    atomic_in( s, buf, 2 );
-
-    /* check status */
-    if ( buf[1] == 0 )
-        return 0;                               /* success */
-    else
-        return -1;                              /* fail */
-}
-
-static const char *
-socks5_getauthname( int auth )
-{
-    switch ( auth ) {
-    case SOCKS5_AUTH_REJECT: return "REJECTED";
-    case SOCKS5_AUTH_NOAUTH: return "NO-AUTH";
-    case SOCKS5_AUTH_GSSAPI: return "GSSAPI";
-    case SOCKS5_AUTH_USERPASS: return "USERPASS";
-    case SOCKS5_AUTH_CHAP: return "CHAP";
-    case SOCKS5_AUTH_EAP: return "EAP";
-    case SOCKS5_AUTH_MAF: return "MAF";
-    default: return "(unknown)";
-    }
-}
-
-typedef struct {
-    char* name;
-    unsigned char auth;
-} AUTH_METHOD_ITEM;
-
-AUTH_METHOD_ITEM socks5_auth_table[] = {
-    { "none", SOCKS5_AUTH_NOAUTH },
-    { "gssapi", SOCKS5_AUTH_GSSAPI },
-    { "userpass", SOCKS5_AUTH_USERPASS },
-    { "chap", SOCKS5_AUTH_CHAP },
-    { NULL, -1 },
-};
-
-int
-socks5_auth_parse_1(char *start, char *end){
-    int i, len;
-    for ( ; *start; start++ )
-        if ( *start != ' ' && *start != '\t') break;
-    for ( end--; end >= start; end-- ) {
-        if ( *end != ' ' && *end != '\t'){
-            end++;
-            break;
-        }
-    }
-    len = end - start;
-    for ( i = 0; socks5_auth_table[i].name != NULL; i++ ){
-        if ( strncmp(start, socks5_auth_table[i].name, len) == 0) {
-            return socks5_auth_table[i].auth;
-        }
-    }
-    fatal("Unknown auth method: %s\n", start);
-    return -1;
-}
-
-int
-socks5_auth_parse(char *start, unsigned char *auth_list, int max_auth){
-    char *end;
-    int i = 0;
-    while ( i < max_auth ) {
-        end = strchr(start, ',');
-        if (*start && end) {
-            auth_list[i++] = socks5_auth_parse_1(start, end);
-            start = ++end;
-        } else {
-            break;
-        }
-    }
-    if ( *start && ( i < max_auth ) ){
-        for( end = start; *end; end++ );
-        auth_list[i++] = socks5_auth_parse_1(start, end);
-    } else {
-        fatal("Too much auth method.\n");
-    }
-    return i;
-}
-
-/* begin SOCKS5 relaying
-   And no authentication is supported.
- */
-int
-begin_socks5_relay( SOCKET s )
-{
-    unsigned char buf[256], *ptr, *env = socks5_auth;
-    unsigned char n_auth = 0; unsigned char auth_list[10], auth_method;
-    int len, auth_result, i;
-
-    debug( "begin_socks_relay()\n");
-
-    /* request authentication */
-    ptr = buf;
-    PUT_BYTE( ptr++, 5);                        /* SOCKS version (5) */
-
-    if ( env == NULL )
-        env = getparam(ENV_SOCKS5_AUTH);
-    if ( env == NULL ) {
-        /* add no-auth authentication */
-        auth_list[n_auth++] = SOCKS5_AUTH_NOAUTH;
-        /* add user/pass authentication */
-        auth_list[n_auth++] = SOCKS5_AUTH_USERPASS;
-    } else {
-        n_auth = socks5_auth_parse(env, auth_list, 10);
-    }
-    PUT_BYTE( ptr++, n_auth);                   /* num auth */
-    for (i=0; i<n_auth; i++) {
-        debug("available auth method[%d] = %s (0x%02x)\n",
-              i, socks5_getauthname(auth_list[i]), auth_list[i]);
-        PUT_BYTE( ptr++, auth_list[i]);         /* authentications */
-    }
-    atomic_out( s, buf, ptr-buf );              /* send requst */
-    atomic_in( s, buf, 2 );                     /* recv response */
-    if ( (buf[0] != 5) ||                       /* ver5 response */
-         (buf[1] == 0xFF) ) {                   /* check auth method */
-        error("No auth method accepted.\n");
-        return -1;
-    }
-    auth_method = buf[1];
-
-    debug("auth method: %s\n", socks5_getauthname(auth_method));
-
-    switch ( auth_method ) {
-    case SOCKS5_AUTH_REJECT:
-        error("No acceptable authentication method\n");
-        return -1;                              /* fail */
-
-    case SOCKS5_AUTH_NOAUTH:
-        /* nothing to do */
-        auth_result = 0;
-        break;
-
-    case SOCKS5_AUTH_USERPASS:
-        auth_result = socks5_do_auth_userpass(s);
-        break;
-
-    default:
-        error("Unsupported authentication method: %s\n",
-              socks5_getauthname( auth_method ));
-        return -1;                              /* fail */
-    }
-    if ( auth_result != 0 ) {
-        error("Authentication failed.\n");
-        return -1;
-    }
-    /* request to connect */
-    ptr = buf;
-    PUT_BYTE( ptr++, 5);                        /* SOCKS version (5) */
-    PUT_BYTE( ptr++, 1);                        /* CMD: CONNECT */
-    PUT_BYTE( ptr++, 0);                        /* FLG: 0 */
-    if ( dest_addr.sin_addr.s_addr == 0 ) {
-        /* resolved by SOCKS server */
-        PUT_BYTE( ptr++, 3);                    /* ATYP: DOMAINNAME */
-        len = strlen(dest_host);
-        PUT_BYTE( ptr++, len);                  /* DST.ADDR (len) */
-        memcpy( ptr, dest_host, len );          /* (hostname) */
-        ptr += len;
-    } else {
-        /* resolved localy */
-        PUT_BYTE( ptr++, 1 );                   /* ATYP: IPv4 */
-        memcpy( ptr, &dest_addr.sin_addr.s_addr, sizeof(dest_addr.sin_addr));
-        ptr += sizeof(dest_addr.sin_addr);
-    }
-    PUT_BYTE( ptr++, dest_port>>8);     /* DST.PORT */
-    PUT_BYTE( ptr++, dest_port&0xFF);
-    atomic_out( s, buf, ptr-buf);               /* send request */
-    atomic_in( s, buf, 4 );                     /* recv response */
-    if ( (buf[1] != SOCKS5_REP_SUCCEEDED) ) {   /* check reply code */
-        error("Got error response from SOCKS server: %d (%s).\n",
-              buf[1], lookup(buf[1], socks5_rep_names));
-        return -1;
-    }
-    ptr = buf + 4;
-    switch ( buf[3] ) {                         /* case by ATYP */
-    case 1:                                     /* IP v4 ADDR*/
-        atomic_in( s, ptr, 4+2 );               /* recv IPv4 addr and port */
-        break;
-    case 3:                                     /* DOMAINNAME */
-        atomic_in( s, ptr, 1 );                 /* recv name and port */
-        atomic_in( s, ptr+1, *(unsigned char*)ptr + 2);
-        break;
-    case 4:                                     /* IP v6 ADDR */
-        atomic_in( s, ptr, 16+2 );              /* recv IPv6 addr and port */
-        break;
-    }
-
-    /* Conguraturation, connected via SOCKS5 server! */
-    return 0;
-}
-
-/* begin SOCKS protocol 4 relaying
-   And no authentication is supported.
-
-   There's SOCKS protocol version 4 and 4a. Protocol version
-   4a has capability to resolve hostname by SOCKS server, so
-   we don't need resolving IP address of destination host on
-   local machine.
-
-   Environment variable SOCKS_RESOLVE directs how to resolve
-   IP addess. There's 3 keywords allowed; "local", "remote"
-   and "both" (case insensitive). Keyword "local" means taht
-   target host name is resolved by localhost resolver
-   (usualy with gethostbyname()), "remote" means by remote
-   SOCKS server, "both" means to try resolving by localhost
-   then remote.
-
-   SOCKS4 protocol and authentication of SOCKS5 protocol
-   requires user name on connect request.
-   User name is determined by following method.
-
-   1. If server spec has user@hostname:port format then
-      user part is used for this SOCKS server.
-
-   2. Get user name from environment variable LOGNAME, USER
-      (in this order).
-
-*/
-int
-begin_socks4_relay( SOCKET s )
-{
-    unsigned char buf[256], *ptr;
-
-    debug( "begin_socks_relay()\n");
-
-    /* make connect request packet
-       protocol v4:
-         VN:1, CD:1, PORT:2, ADDR:4, USER:n, NULL:1
-       protocol v4a:
-         VN:1, CD:1, PORT:2, DUMMY:4, USER:n, NULL:1, HOSTNAME:n, NULL:1
-    */
-    ptr = buf;
-    PUT_BYTE( ptr++, 4);                        /* protocol version (4) */
-    PUT_BYTE( ptr++, 1);                        /* CONNECT command */
-    PUT_BYTE( ptr++, dest_port>>8);     /* destination Port */
-    PUT_BYTE( ptr++, dest_port&0xFF);
-    /* destination IP */
-    memcpy(ptr, &dest_addr.sin_addr, sizeof(dest_addr.sin_addr));
-    ptr += sizeof(dest_addr.sin_addr);
-    if ( dest_addr.sin_addr.s_addr == 0 )
-        *(ptr-1) = 1;                           /* fake, protocol 4a */
-    /* username */
-    if (relay_user == NULL)
-        fatal( "Cannot determine user name.\n");
-    strcpy( ptr, relay_user );
-    ptr += strlen( relay_user ) +1;
-    /* destination host name (for protocol 4a) */
-    if ( (socks_version == 4) && (dest_addr.sin_addr.s_addr == 0)) {
-        strcpy( ptr, dest_host );
-        ptr += strlen( dest_host ) +1;
-    }
-    /* send command and get response
-       response is: VN:1, CD:1, PORT:2, ADDR:4 */
-    atomic_out( s, buf, ptr-buf);               /* send request */
-    atomic_in( s, buf, 8 );                     /* recv response */
-    if ( (buf[1] != SOCKS4_REP_SUCCEEDED) ) {   /* check reply code */
-        error("Got error response: %d: '%s'.\n",
-              buf[1], lookup(buf[1], socks4_rep_names));
-        return -1;                              /* failed */
-    }
-
-    /* Conguraturation, connected via SOCKS4 server! */
-    return 0;
-}
-
-int
-sendf(SOCKET s, const char *fmt,...)
-{
-    static char buf[10240];                     /* xxx, enough? */
-
-    va_list args;
-    va_start( args, fmt );
-    vsnprintf( buf, sizeof(buf), fmt, args );
-    va_end( args );
-
-    report_text(">>>", buf);
-    if ( send(s, buf, strlen(buf), 0) == SOCKET_ERROR ) {
-        debug("failed to send http request. errno=%d\n", socket_errno());
-        return -1;
-    }
-    return 0;
-}
-
-const char *base64_table =
-"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-char *
-make_base64_string(const char *str)
-{
-    static char *buf;
-    unsigned char *src;
-    char *dst;
-    int bits, data, src_len, dst_len;
-    /* make base64 string */
-    src_len = strlen(str);
-    dst_len = (src_len+2)/3*4;
-    buf = xmalloc(dst_len+1);
-    bits = data = 0;
-    src = (unsigned char *)str;
-    dst = (unsigned char *)buf;
-    while ( dst_len-- ) {
-        if ( bits < 6 ) {
-            data = (data << 8) | *src;
-            bits += 8;
-            if ( *src != 0 )
-                src++;
-        }
-        *dst++ = base64_table[0x3F & (data >> (bits-6))];
-        bits -= 6;
-    }
-    *dst = '\0';
-    /* fix-up tail padding */
-    switch ( src_len%3 ) {
-    case 1:
-        *--dst = '=';
-    case 2:
-        *--dst = '=';
-    }
-    return buf;
-}
-
-
-int
-basic_auth (SOCKET s)
-{
-    char *userpass;
-    char *cred;
-    const char *user = relay_user;
-    char *pass = NULL;
-    int len, ret;
-
-    /* Get username/password for authentication */
-    if (user == NULL)
-        fatal("Cannot decide username for proxy authentication.");
-    if ((pass = determine_relay_password ()) == NULL &&
-        (pass = readpass("Enter proxy authentication password for %s@%s: ",
-                         relay_user, relay_host)) == NULL)
-        fatal("Cannot decide password for proxy authentication.");
-
-    len = strlen(user)+strlen(pass)+1;
-    userpass = xmalloc(len+1);
-    snprintf(userpass, len+1, "%s:%s", user, pass);
-    memset (pass, 0, strlen(pass));
-    cred = make_base64_string(userpass);
-    memset (userpass, 0, len);
-
-    f_report = 0;                               /* don't report for security */
-    ret = sendf(s, "Proxy-Authorization: Basic %s\r\n", cred);
-    f_report = 1;
-    report_text(">>>", "Proxy-Authorization: Basic xxxxx\r\n");
-
-    memset(cred, 0, strlen(cred));
-    free(cred);
-
-    return ret;
-}
-
-/* begin relaying via HTTP proxy
-   Directs CONNECT method to proxy server to connect to
-   destination host (and port). It may not be allowed on your
-   proxy server.
- */
-int
-begin_http_relay( SOCKET s )
-{
-    char buf[1024];
-    int result;
-    char *auth_what;
-
-    debug("begin_http_relay()\n");
-
-    if (sendf(s,"CONNECT %s:%d HTTP/1.0\r\n", dest_host, dest_port) < 0)
-        return START_ERROR;
-    if (proxy_auth_type == PROXY_AUTH_BASIC && basic_auth (s) < 0)
-        return START_ERROR;
-    if (sendf(s,"\r\n") < 0)
-        return START_ERROR;
-
-    /* get response */
-    if ( line_input(s, buf, sizeof(buf)) < 0 ) {
-        debug("failed to read http response.\n");
-        return START_ERROR;
-    }
-
-    /* check status */
-    if (!strchr(buf, ' ')) {
-	error ("Unexpected http response: '%s'.\n", buf);
-	return START_ERROR;
-    }
-    result = atoi(strchr(buf,' '));
-
-    switch ( result ) {
-    case 200:
-        /* Conguraturation, connected via http proxy server! */
-        debug("connected, start user session.\n");
-        break;
-    case 302:                                   /* redirect */
-        do {
-            if (line_input(s, buf, sizeof(buf)))
-                break;
-            downcase(buf);
-            if (expect(buf, "Location: ")) {
-                relay_host = cut_token(buf, "//");
-                cut_token(buf, "/");
-                relay_port = atoi(cut_token(buf, ":"));
-            }
-        } while (strcmp(buf,"\r\n") != 0);
-        return START_RETRY;
-
-    /* We handle both 401 and 407 codes here: 401 is WWW-Authenticate, which
-     * not strictly the correct response, but some proxies do send this (e.g.
-     * Symantec's Raptor firewall) */
-    case 401:                                   /* WWW-Auth required */
-    case 407:                                   /* Proxy-Auth required */
-        /** NOTE: As easy implementation, we support only BASIC scheme
-            and ignore realm. */
-        /* If proxy_auth_type is PROXY_AUTH_BASIC and get
-         this result code, authentication was failed. */
-        if (proxy_auth_type != PROXY_AUTH_NONE) {
-            error("Authentication failed.\n");
-            return START_ERROR;
-        }
-        auth_what = (result == 401) ? "WWW-Authenticate:" : "Proxy-Authenticate:";
-        do {
-            if ( line_input(s, buf, sizeof(buf)) ) {
-                break;
-            }
-            downcase(buf);
-            if (expect(buf, auth_what)) {
-                /* parse type and realm */
-                char *scheme, *realm;
-                scheme = cut_token(buf, " ");
-                realm = cut_token(scheme, " ");
-                if ( scheme == NULL || realm == NULL ) {
-                    debug("Invalid format of %s field.", auth_what);
-                    return START_ERROR;         /* fail */
-                }
-                /* check supported auth type */
-                if (expect(scheme, "basic")) {
-                    proxy_auth_type = PROXY_AUTH_BASIC;
-                } else {
-                    debug("Unsupported authentication type: %s", scheme);
-                }
-            }
-        } while (strcmp(buf,"\r\n") != 0);
-        if ( proxy_auth_type == PROXY_AUTH_NONE ) {
-            debug("Can't find %s in response header.", auth_what);
-            return START_ERROR;
-        } else {
-            return START_RETRY;
-        }
-
-    default:
-        /* Not allowed */
-        debug("http proxy is not allowed.\n");
-        return START_ERROR;
-    }
-    /* skip to end of response header */
-    do {
-        if ( line_input(s, buf, sizeof(buf) ) ) {
-            debug("Can't skip response headers\n");
-            return START_ERROR;
-        }
-    } while ( strcmp(buf,"\r\n") != 0 );
-
-    return START_OK;
-}
-
-/* begin relaying via TELNET proxy.
-   Sends string specified by telnet_command (-c option) with
-   replacing host name and port number to the socket.  */
-int
-begin_telnet_relay( SOCKET s )
-{
-    char buf[1024];
-    char *cmd;
-    char *good_phrase = "connected to";
-    char *bad_phrase_list[] = {
-	" failed", " refused", " rejected", " closed"
-    };
-    char sep = ' ';
-    int i;
-
-    debug("begin_telnet_relay()\n");
-
-    /* report phrase */
-    debug("good phrase: '%s'\n", good_phrase);
-    debug("bad phrases");
-    sep = ':';
-    for (i=0; i< (sizeof(bad_phrase_list) / sizeof(char*)); i++) {
-	debug_("%c '%s'", sep, bad_phrase_list[i]);
-	sep = ',';
-    }
-    debug_("\n");
-
-    /* make request string with replacing %h by destination hostname
-       and %p by port number, etc. */
-    cmd = expand_host_and_port(telnet_command, dest_host, dest_port);
-    
-    /* Sorry, we send request string now without waiting a prompt. */
-    if (sendf(s, "%s\r\n", cmd) < 0) {
-	free(cmd);
-        return START_ERROR;
-    }
-    free(cmd);
-
-    /* Process answer from proxy until good or bad phrase is detected.  We
-       assume that the good phrase should be appeared only in the final
-       line of proxy responses. Bad keywods in the line causes operation
-       fail. First checks a good phrase, then checks bad phrases.
-       If no match, continue reading line from proxy. */
-    while (!line_input(s, buf, sizeof(buf)) && buf[0] != '\0') {
-	downcase(buf);
-	/* first, check good phrase */
-        if (strstr(buf, good_phrase)) {
-	    debug("good phrase is detected: '%s'\n", good_phrase);
-            return START_OK;
-        }
-	/* then, check bad phrase */
-	for (i=0; i<(sizeof(bad_phrase_list)/sizeof(char*)); i++) {
-	    if (strstr(buf, bad_phrase_list[i]) != NULL) {
-		debug("bad phrase is detected: '%s'\n", bad_phrase_list[i]);
-		return START_ERROR;
-	    }
-        }
-    }
-    debug("error reading from telnet proxy\n");
-
-    return START_ERROR;
-}
-
-
-#ifdef _WIN32
-/* ddatalen()
-   Returns 1 if data is available, otherwise return 0
- */
-int
-stdindatalen (void)
-{
-    DWORD len = 0;
-    struct stat st;
-    fstat( 0, &st );
-    if ( st.st_mode & _S_IFIFO ) {
-        /* in case of PIPE */
-        if ( !PeekNamedPipe( GetStdHandle(STD_INPUT_HANDLE),
-                             NULL, 0, NULL, &len, NULL) ) {
-            if ( GetLastError() == ERROR_BROKEN_PIPE ) {
-                /* PIPE source is closed */
-                /* read() will detects EOF */
-                len = 1;
-            } else {
-                fatal("PeekNamedPipe() failed, errno=%d\n",
-                      GetLastError());
-            }
-        }
-    } else if ( st.st_mode & _S_IFREG ) {
-        /* in case of regular file (redirected) */
-        len = 1;                        /* always data ready */
-    } else if ( _kbhit() ) {
-        /* in case of console */
-        len = 1;
-    }
-    return len;
-}
-#endif /* _WIN32 */
-
-/* relay byte from stdin to socket and fro socket to stdout.
-   returns reason of termination */
-int
-do_repeater( SOCKET local_in, SOCKET local_out, SOCKET remote )
-{
-    /** vars for local input data **/
-    char lbuf[1024];                            /* local input buffer */
-    int lbuf_len;                               /* available data in lbuf */
-    int f_local;                                /* read local input more? */
-    /** vars for remote input data **/
-    char rbuf[1024];                            /* remote input buffer */
-    int rbuf_len;                               /* available data in rbuf */
-    int f_remote;                               /* read remote input more? */
-    int close_reason = REASON_UNK;              /* reason of end repeating */
-    /** other variables **/
-    int nfds, len;
-    fd_set ifds, ofds;
-    struct timeval *tmo;
-#ifdef _WIN32
-    struct timeval win32_tmo;
-#endif /* _WIN32 */
-
-    /* repeater between stdin/out and socket  */
-    nfds = ((local_in<remote)? remote: local_in) +1;
-    f_local = 1;                                /* yes, read from local */
-    f_remote = 1;                               /* yes, read from remote */
-    lbuf_len = 0;
-    rbuf_len = 0;
-
-    while ( f_local || f_remote ) {
-        FD_ZERO(&ifds );
-        FD_ZERO(&ofds );
-        tmo = NULL;
-
-        /** prepare for reading local input **/
-        if ( f_local && (lbuf_len < (int)sizeof(lbuf)) ) {
-#ifdef _WIN32
-            if ( local_type != LOCAL_SOCKET ) {
-                /* select() on Winsock is not accept standard handle.
-                   So use select() with short timeout and checking data
-                   in stdin by another method. */
-                win32_tmo.tv_sec = 0;
-                win32_tmo.tv_usec = 10*1000;    /* 10 ms */
-                tmo = &win32_tmo;
-            } else
-#endif /* !_WIN32 */
-            FD_SET( local_in, &ifds );
-        }
-
-        /** prepare for reading remote input **/
-        if ( f_remote && (rbuf_len < (int)sizeof(rbuf)) ) {
-            FD_SET( remote, &ifds );
-        }
-
-        /* FD_SET( local_out, ofds ); */
-        /* FD_SET( remote, ofds ); */
-
-        if ( select( nfds, &ifds, &ofds, (fd_set*)NULL, tmo ) == -1 ) {
-            /* some error */
-            error( "select() failed, %d\n", socket_errno());
-            return REASON_ERROR;
-        }
-#ifdef _WIN32
-        /* fake ifds if local is stdio handle because
-           select() of Winsock does not accept stdio
-           handle. */
-        if (f_local && (local_type!=LOCAL_SOCKET) && (0<stdindatalen()))
-            FD_SET(0,&ifds);            /* data ready */
-#endif
-
-        /* remote => local */
-        if ( FD_ISSET(remote, &ifds) && (rbuf_len < (int)sizeof(rbuf)) ) {
-            len = recv( remote, rbuf + rbuf_len, sizeof(rbuf)-rbuf_len, 0);
-            if ( len == 0 || (len == -1 && socket_errno() == ECONNRESET)) {
-                debug("connection %s by peer\n",
-                      (len==0)? "closed": "reset");
-                close_reason = REASON_CLOSED_BY_REMOTE;
-                f_remote = 0;                   /* no more read from socket */
-                f_local = 0;
-            } else if ( len == -1 ) {
-                /* error */
-                fatal("recv() failed, %d\n", socket_errno());
-            } else {
-                debug("recv %d bytes\n", len);
-                if ( 1 < f_debug )              /* more verbose */
-                    report_bytes( "<<<", rbuf+rbuf_len, len);
-                rbuf_len += len;
-            }
-        }
-
-        /* local => remote */
-        if ( FD_ISSET(local_in, &ifds) && (lbuf_len < (int)sizeof(lbuf)) ) {
-            if (local_type == LOCAL_SOCKET)
-                len = recv(local_in, lbuf + lbuf_len,
-                           sizeof(lbuf)-lbuf_len, 0);
-            else
-                len = read(local_in, lbuf + lbuf_len, sizeof(lbuf)-lbuf_len);
-            if ( len == 0 ) {
-                /* stdin is EOF */
-                debug("local input is EOF\n");
-                if (!f_hold_session)
-                    shutdown(remote, 1);        /* no-more writing */
-                f_local = 0;
-                close_reason = REASON_CLOSED_BY_LOCAL;
-            } else if ( len == -1 ) {
-                /* error on reading from stdin */
-                if (f_hold_session) {
-                    debug ("failed to read from local\n");
-                    f_local = 0;
-                    close_reason = REASON_CLOSED_BY_LOCAL;
-                } else
-                    fatal("recv() failed, errno = %d\n", errno);
-            } else {
-                /* repeat */
-                lbuf_len += len;
-            }
-        }
-
-        /* flush data in buffer to socket */
-        if ( 0 < lbuf_len ) {
-            len = send(remote, lbuf, lbuf_len, 0);
-            if ( len == -1 ) {
-                fatal("send() failed, %d\n", socket_errno());
-            } else if ( 0 < len ) {
-                if ( 1 < f_debug )              /* more verbose */
-                    report_bytes( ">>>", lbuf, len);
-                /* move data on to top of buffer */
-                debug("sent %d bytes\n", len);
-                lbuf_len -= len;
-                if ( 0 < lbuf_len )
-                    memcpy( lbuf, lbuf+len, lbuf_len );
-                assert( 0 <= lbuf_len );
-            }
-        }
-
-        /* flush data in buffer to local output */
-        if ( 0 < rbuf_len ) {
-            if (local_type == LOCAL_SOCKET)
-                len = send( local_out, rbuf, rbuf_len, 0);
-            else
-                len = write( local_out, rbuf, rbuf_len);
-            if ( len == -1 ) {
-                fatal("output (local) failed, errno=%d\n", errno);
-            }
-            rbuf_len -= len;
-            if ( len < rbuf_len )
-                memcpy( rbuf, rbuf+len, rbuf_len );
-            assert( 0 <= rbuf_len );
-        }
-        if (f_local == 0 && f_hold_session) {
-            debug ("closing local port without disconnecting from remote\n");
-            f_remote = 0;
-            shutdown (local_out, 2);
-            close (local_out);
-            break;
-        }
-    }
-
-    return close_reason;
-}
-
-int
-accept_connection (u_short port)
-{
-    static int sock = -1;
-    int connection;
-    struct sockaddr_in name;
-    struct sockaddr client;
-    int socklen;
-    fd_set ifds;
-    int nfds;
-    int sockopt;
-
-    /* Create the socket. */
-    debug("Creating source port to forward.\n");
-    sock = socket (PF_INET, SOCK_STREAM, 0);
-    if (sock < 0)
-        fatal("socket() failed, errno=%d\n", socket_errno());
-    sockopt = 1;
-    setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
-                (void*)&sockopt, sizeof(sockopt));
-
-    /* Give the socket a name. */
-    name.sin_family = AF_INET;
-    name.sin_port = htons (port);
-    name.sin_addr.s_addr = htonl (INADDR_ANY);
-    if (bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0)
-        fatal ("bind() failed, errno=%d\n", socket_errno());
-
-    if (listen( sock, 1) < 0)
-        fatal ("listen() failed, errno=%d\n", socket_errno());
-
-    /* wait for new connection with watching EOF of stdin. */
-    debug ("waiting new connection at port %d (socket=%d)\n", port, sock);
-    nfds = sock + 1;
-    do {
-        int n;
-        struct timeval *ptmo = NULL;
-#ifdef _WIN32
-        struct timeval tmo;
-        tmo.tv_sec = 0;
-        tmo.tv_usec = 100*1000;                 /* On Windows, 100ms timeout */
-        ptmo = &tmo;
-#endif /* _WIN32 */
-        FD_ZERO (&ifds);
-        FD_SET ((SOCKET)sock, &ifds);
-#ifndef _WIN32
-        FD_SET (0, &ifds);                      /* watch stdin */
-#endif
-        n = select (nfds, &ifds, NULL, NULL, ptmo);
-        if (n == -1) {
-            fatal ("select() failed, %d\n", socket_errno());
-            exit (1);
-        }
-#ifdef _WIN32
-        if (0 < stdindatalen()) {
-            FD_SET (0, &ifds);          /* fake */
-            n++;
-        }
-#endif
-        if (0 < n) {
-            if (FD_ISSET(0, &ifds) && (getchar() <= 0)) {
-                /* EOF */
-                debug ("Give-up waiting port because stdin is closed.");
-                exit(0);
-            }
-            if (FD_ISSET(sock, &ifds))
-                break;                          /* socket is stimulated */
-        }
-    } while (1);
-    socklen = sizeof(client);
-    connection = accept( sock, &client, &socklen);
-    if ( connection < 0 )
-        fatal ("accept() failed, errno=%d\n", socket_errno());
-    return connection;
-}
-
-
-
-/** Main of program **/
-int
-main( int argc, char **argv )
-{
-    int ret;
-    int remote;                                 /* socket */
-    int local_in;                               /* Local input */
-    int local_out;                              /* Local output */
-    int reason;
-#ifdef _WIN32
-    WSADATA wsadata;
-    WSAStartup( 0x101, &wsadata);
-#endif /* _WIN32 */
-
-    /* initialization */
-    make_revstr();
-    getarg( argc, argv );
-    debug("Program is $Revision: 100 $\n");
-
-    /* Open local_in and local_out if forwarding a port */
-    if ( local_type == LOCAL_SOCKET ) {
-        /* Relay between local port and destination */
-        local_in = local_out = accept_connection( local_port );
-    } else {
-        /* Relay between stdin/stdout and desteination */
-        local_in = 0;
-        local_out = 1;
-#ifdef _WIN32
-        _setmode(local_in, O_BINARY);
-        _setmode(local_out, O_BINARY);
-#endif
-    }
-
-retry:
-#ifndef _WIN32
-    if (0 < connect_timeout)
-        set_timeout (connect_timeout);
-#endif /* not _WIN32 */
-
-    if (check_direct(dest_host))
-        relay_method = METHOD_DIRECT;
-    /* make connection */
-    if ( relay_method == METHOD_DIRECT ) {
-        remote = open_connection (dest_host, dest_port);
-        if ( remote == SOCKET_ERROR )
-            fatal( "Unable to connect to destination host, errno=%d\n",
-                   socket_errno());
-    } else {
-        remote = open_connection (relay_host, relay_port);
-        if ( remote == SOCKET_ERROR )
-            fatal( "Unable to connect to relay host, errno=%d\n",
-                   socket_errno());
-    }
-
-    /** resolve destination host (SOCKS) **/
-#if !defined(_WIN32) && !defined(__CYGWIN32__)
-    if (socks_ns.sin_addr.s_addr != 0)
-        switch_ns (&socks_ns);
-#endif /* not _WIN32 && not __CYGWIN32__ */
-    if (relay_method == METHOD_SOCKS &&
-        socks_resolve == RESOLVE_LOCAL &&
-        local_resolve (dest_host, &dest_addr) < 0) {
-        fatal("Unknown host: %s", dest_host);
-    }
-
-    /** relay negociation **/
-    switch ( relay_method ) {
-    case METHOD_SOCKS:
-        if ( ((socks_version == 5) && (begin_socks5_relay(remote) < 0)) ||
-             ((socks_version == 4) && (begin_socks4_relay(remote) < 0)) )
-            fatal( "failed to begin relaying via SOCKS.\n");
-        break;
-
-    case METHOD_HTTP:
-        ret = begin_http_relay(remote);
-        switch (ret) {
-        case START_ERROR:
-            close (remote);
-            fatal("failed to begin relaying via HTTP.\n");
-        case START_OK:
-            break;
-        case START_RETRY:
-            /* retry with authentication */
-            close (remote);
-            goto retry;
-        }
-        break;
-    case METHOD_TELNET:
-        if (begin_telnet_relay(remote) < 0)
-             fatal("failed to begin relaying via telnet.\n");
-        break;
-    }
-    debug("connected\n");
-
-#ifndef _WIN32
-    if (0 < connect_timeout)
-        set_timeout (0);
-#endif /* not _WIN32 */
-
-    /* main loop */
-    debug ("start relaying.\n");
-do_repeater:
-    reason = do_repeater(local_in, local_out, remote);
-    debug ("relaying done.\n");
-    if (local_type == LOCAL_SOCKET &&
-        reason == REASON_CLOSED_BY_LOCAL &&
-        f_hold_session) {
-        /* re-wait at local port without closing remote session */
-        debug ("re-waiting at local port %d\n", local_port);
-        local_in = local_out = accept_connection( local_port );
-        debug ("re-start relaying\n");
-        goto do_repeater;
-    }
-    closesocket(remote);
-    if ( local_type == LOCAL_SOCKET)
-        closesocket(local_in);
-#ifdef _WIN32
-    WSACleanup();
-#endif /* _WIN32 */
-    debug ("that's all, bye.\n");
-
-    return 0;
-}
-
-/* ------------------------------------------------------------
-   Local Variables:
-   compile-command: "cc connect.c -o connect"
-   tab-width: 8
-   fill-column: 74
-   comment-column: 48
-   End:
-   ------------------------------------------------------------ */
-
-/*** end of connect.c ***/
-- 
1.7.5.4

[PATCH 7/7] oe-git-proxy: Use socat instead of BSD nc

[Darren Hart]

BSD nc was commonly available on the current distros until Fedora 18
appears to have dropped it. socat appears to be a reasonable replacement
with availability on Fedora and Ubuntu and going back some time as well.

Update the script to use the socat syntax.
Simplify the logic a bit by using exec for the no-proxy-needed cases.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 scripts/oe-git-proxy |   59 ++++++++++++++++++++++---------------------------
 1 files changed, 27 insertions(+), 32 deletions(-)

diff --git a/scripts/oe-git-proxy b/scripts/oe-git-proxy
index 4c2f179..98191fa 100755
--- a/scripts/oe-git-proxy
+++ b/scripts/oe-git-proxy
@@ -1,13 +1,11 @@
 #!/bin/bash
 
-# oe-git-proxy is a simple tool to be via GIT_PROXY_COMMAND. It uses BSD netcat
+# oe-git-proxy is a simple tool to be via GIT_PROXY_COMMAND. It uses socat
 # to make SOCKS5 or HTTPS proxy connections. It uses ALL_PROXY to determine the
 # proxy server, protocol, and port. It uses NO_PROXY to skip using the proxy for
 # a comma delimited list of hosts, host globs (*.example.com), IPs, or CIDR
 # masks (192.168.1.0/24). It is known to work with both bash and dash shells.
 #
-# BSD netcat is provided by netcat-openbsd on Ubuntu and nc on Fedora.
-#
 # Example ALL_PROXY values:
 # ALL_PROXY=socks://socks.example.com:1080
 # ALL_PROXY=https://proxy.example.com:8080
@@ -15,27 +13,13 @@
 # Copyright (c) 2013, Intel Corporation.
 # All rights reserved.
 #
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
 # AUTHORS
 # Darren Hart <dvhart@linux.intel.com>
 
 # Locate the netcat binary
-NC=$(which nc 2>/dev/null)
+SOCAT=$(which socat 2>/dev/null)
 if [ $? -ne 0 ]; then
-	echo "ERROR: nc binary not in PATH"
+	echo "ERROR: socat binary not in PATH"
 	exit 1
 fi
 METHOD=""
@@ -111,28 +95,39 @@ match_host() {
 	return 1
 }
 
-# If no proxy is set, just connect directly
+# If no proxy is set or needed, just connect directly
+METHOD="TCP:$1:$2"
+
 if [ -z "$ALL_PROXY" ]; then
-	exec $NC -X connect "$@"
+	exec $SOCAT STDIO $METHOD
 fi
 
 # Connect directly to hosts in NO_PROXY
 for H in ${NO_PROXY//,/ }; do
 	if match_host $1 $H; then
-		METHOD="-X connect"
-		break
+		exec $SOCAT STDIO $METHOD
 	fi
 done
 
-if [ -z "$METHOD" ]; then
-	# strip the protocol and the trailing slash
-	PROTO=$(echo $ALL_PROXY | sed -e 's/\([^:]*\):\/\/.*/\1/')
-	PROXY=$(echo $ALL_PROXY | sed -e 's/.*:\/\/\([^:]*:[0-9]*\).*/\1/')
-	if [ "$PROTO" = "socks" ]; then
-		METHOD="-X 5 -x $PROXY"
-	elif [ "$PROTO" = "https" ]; then
-		METHOD="-X connect -x $PROXY"
+# Proxy is necessary, determine protocol, server, and port
+PROTO=$(echo $ALL_PROXY | sed -e 's/\([^:]*\):\/\/.*/\1/')
+PROXY=$(echo $ALL_PROXY | sed -e 's/.*:\/\/\([^:]*\).*/\1/')
+PORT=$(echo $ALL_PROXY | sed -e 's/.*:\([0-9]*\)\/?$/\1/')
+if [ "$PORT" = "$ALL_PROXY" ]; then
+	PORT=""
+fi
+
+if [ "$PROTO" = "socks" ]; then
+	if [ -z "$PORT" ]; then
+		PORT="1080"
+	fi
+	METHOD="SOCKS4:$PROXY:$1:$2,socksport=$PORT"
+else
+	# Assume PROXY (http, https, etc)
+	if [ -z "$PORT" ]; then
+		PORT="8080"
 	fi
+	METHOD="PROXY:$PROXY:$1:$2,proxyport=$PORT"
 fi
 
-exec $NC $METHOD "$@"
+exec $SOCAT STDIO $METHOD
-- 
1.7.5.4