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#!/bin/bash
# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# char* pppd_provides(void)
#
# Returns a string to change module definition for starting up
pppd_provides() {
echo "ppp"
}
# void pppd_depend(void)
#
# Sets up the dependancies for the module
pppd_depend() {
after interface
before dhcp
}
# bool pppd_check_installed(void)
#
# Returns 1 if pppd is installed, otherwise 0
pppd_check_installed() {
if [[ ! -x /usr/sbin/pppd ]]; then
${1:-false} && eerror "For PPP support, emerge net-dialup/ppp"
return 1
fi
return 0
}
# bool pppd_check_depends(void)
#
# Checks to see if we have the needed functions
pppd_check_depends() {
return 0
}
# char *pppd_regex_escape(char *string)
#
# Returns the supplied string with any special regex
# characters escaped so they don't provide regex intructions
# This may be a candidate for adding to /sbin/functions.sh or
# net-scripts functions at some point
pppd_regex_escape() {
local escaped_result="$*"
escaped_result=${escaped_result//\\/\\\\}
escaped_result=${escaped_result//./\\.}
escaped_result=${escaped_result//+/\\+}
escaped_result=${escaped_result//(/\\(}
escaped_result=${escaped_result//)/\\)}
escaped_result=${escaped_result//[/\\[}
escaped_result=${escaped_result//]/\\]}
escaped_result=${escaped_result//\{/\\\{}
escaped_result=${escaped_result//\}/\\\}}
escaped_result=${escaped_result//\?/\\\?}
escaped_result=${escaped_result//\*/\\\*}
escaped_result=${escaped_result//\//\\/}
escaped_result=${escaped_result//|/\\|}
escaped_result=${escaped_result//&/\\&}
escaped_result=${escaped_result//~/\\~}
escaped_result=${escaped_result//^/\\^}
escaped_result=${escaped_result//$/\\$}
echo $escaped_result
}
# bool pppd_update_secrets_file(char* filepath, char* username, \
# char* remotename, char* password)
#
# Add/update PAP/CHAP authentication information
pppd_update_secrets_file() {
local filepath="$1" username="$2" remotename="$3" password="$4"
if [[ ! -f ${filepath} ]]; then
touch ${filepath} && \
chmod 0600 ${filepath} || \
return 1
fi
#escape username and remotename, used in following sed calls
local regex_username=$(pppd_regex_escape ${username})
local regex_remotename=$(pppd_regex_escape ${remotename})
local regex_password
local regex_filter="[ \t]*\"?${regex_username}\"?[ \t]*\"?${regex_remotename}\"?[ \t]*"
#read old password, including " chars
#for being able to distinct when we need to add or update auth info
local old_password=$(
sed -r -e "/^${regex_filter}\".*\"[ \t]*\$/\
{s/^${regex_filter}(\".*\")[ \t]*\$/\1/;q;};\
d;" \
${filepath}
)
if [[ -z "${old_password}" ]]; then
regex_username=${username//\\/\\\\}
regex_remotename=${remotename//\\/\\\\}
regex_password=${password//\\/\\\\}
regex_password=${password//"/\\"}
sed -r -i -e "\$a\"${regex_username}\" ${regex_remotename} \"${regex_password}\"" ${filepath}
vewarn "Authentication info has been added to ${filepath}"
elif [[ "\"${password//\"/\\\"}\"" != "${old_password}" ]]; then
regex_password=${password//\\/\\\\}
regex_password=${regex_password//\//\\/}
regex_password=${regex_password//&/\\&}
regex_password=${regex_password//\"/\\\\\"}
sed -r -i -e "s/^(${regex_filter}\").*(\"[ \t]*)\$/\1${regex_password}\2/" ${filepath}
vewarn "Authentication info has been updated in ${filepath}"
fi
return 0
}
# bool pppd_start(char *iface)
#
# Start PPP on an interface by calling pppd
#
# Returns 0 (true) when successful, otherwise 1
pppd_start() {
local iface="$1" ifvar=$( bash_variable "$1" ) opts="" link
if [[ ${iface%%[0-9]*} != "ppp" ]]; then
eerror "PPP can only be invoked from net.ppp[0-9]"
return 1
fi
local unit="${iface#ppp}"
if [[ -z ${unit} ]] ; then
eerror "PPP requires a unit - use net.ppp[0-9] instead of net.ppp"
return 1
fi
# PPP requires a link to communicate over - normally a serial port
# PPPoE communicates over ethernet
# PPPoA communictes over ATM
# In all cases, the link needs to be available before we start PPP
eval link=\"\$\{link_${ifvar}\}\"
if [[ -z ${link} ]]; then
eerror "link_${ifvar} has not been set in /etc/conf.d/net"
return 1
fi
# Might or might not be set in conf.d/net
local user password i
eval username=\"\$\{username_${ifvar}\}\"
eval password=\"\$\{password_${ifvar}\}\"
#Add/update info in PAP/CHAP secrets files
if [[ -n ${username} && -n ${password} ]]; then
for i in chap pap ; do
if ! pppd_update_secrets_file "/etc/ppp/${i}-secrets" \
"${username}" "${iface}" "${password}" ; then
eerror "Failed to update /etc/ppp/${i}-secrets"
return 1
fi
done
fi
# Load any commandline options
eval opts=\"\$\{pppd_${ifvar}\[@\]}\"
# We don't work if nodetach or unit is set
for i in nodetach updetach unit ; do
if [[ " ${opts} " == *" ${i} "* ]]; then
eerror "The option \"${i}\" is not allowed"
return 1
fi
done
# Check for mtu/mru
local mtu
eval mtu=\"\$\{mtu_${ifvar}\}\"
if [[ -n ${mtu} ]]; then
[[ " ${opts} " != *" mtu "* ]] && opts="${opts} mtu ${mtu}"
[[ " ${opts} " != *" mru "* ]] && opts="${opts} mru ${mtu}"
fi
# Detach if we're not idling
[[ " ${opts} " != *" idle "* && " ${opts} " != *" updetach "* ]] \
&& opts="${opts} updetach"
# Setup auth info
[[ -n ${username} ]] && opts="user \"${username}\" ${opts}"
opts="remotename ${iface} ${opts}"
# Load a custom interface configuration file if it exists
[[ -f "/etc/ppp/options.${iface}" ]] \
&& opts="${opts} file /etc/ppp/options.${iface}"
# Set forced options
opts="unit ${unit} persist maxfail 0 ${opts}"
# Setup connect script
local -a chat
eval chat=( \"\$\{chat_${ifvar}\[@\]\}\" )
if [[ -n "${chat[@]}" ]]; then
opts="${opts} connect \"/usr/sbin/chat -e -E -v"
local -a phone_number
eval phone_number=( \"\$\{phone_number_${ifvar}\}\" )
if [[ ${#phone_number[@]} -ge 1 ]]; then
opts="${opts} -T '${phone_number[0]}'"
if [[ ${#phone_number[@]} -ge 2 ]]; then
opts="${opts} -U '${phone_number[1]}'"
fi
fi
for (( i=0; i<${#chat[@]}; i++ )); do
opts="${opts} '${chat[i]}'"
done
opts="${opts}\""
fi
# Add plugins
local -a plugins
eval plugins=( \"\$\{plugins_${ifvar}\[@\]\}\" )
if [[ -n "${plugins[@]}" ]]; then
for (( i=0; i<${#plugins[@]}; i++ )); do
local -a plugin=( ${plugins[i]} )
# Bound to be some users who do this
[[ ${plugin[0]} == "pppoe" ]] && plugin[0]="rp-pppoe"
[[ ${plugin[0]} == "pppoa" ]] && plugin[0]="pppoatm"
[[ ${plugin[0]} == "capi" ]] && plugin[0]="capiplugin"
[[ ${plugin[0]} == "rp-pppoe" ]] && opts="${opts} connect true"
opts="${opts} plugin ${plugin[0]}.so ${plugin[@]:1}"
[[ ${plugin[0]} == "rp-pppoe" ]] && opts="${opts} ${link}"
done
fi
#Specialized stuff. Insert here actions particular to connection type (pppoe,pppoa,capi)
local insert_link_in_opts=1
if [[ " ${opts} " == *" plugin rp-pppoe.so "* ]]; then
# Ensure that the link exists and is up
interface_exists "${link}" true || return 1
interface_up "${link}"
# Load the pppoe kernel module - if this fails, we have to hope
# that pppoe support is compiled into the kernel
modprobe pppoe 2>/dev/null
insert_link_in_opts=0
fi
[[ ${insert_link_in_opts} -eq 0 ]] || opts="${link} ${opts}"
ebegin "Running pppd"
i=$( eval /usr/sbin/pppd ${opts} )
eend $? "${i}" || return 1
local addr=$( interface_get_address "${iface}" )
einfo "${iface} received address ${addr}"
}
# bool pppd_stop(char *iface)
#
# Stop PPP link by killing the associated pppd process
#
# Returns 0 (true) if no process to kill or it terminates successfully,
# otherwise non-zero (false)
pppd_stop() {
local iface="$1" pidfile="/var/run/$1.pid"
[[ ! -s ${pidfile} ]] && return 0
local pid=$(<"${pidfile}")
einfo "Stopping pppd on ${iface}"
kill -s TERM "${pid}"
process_finished "${pid}" /usr/sbin/pppd
eend $?
}
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