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Diffstat (limited to 'net-scripts/net.modules.d/pppd.sh')
| -rw-r--r-- | net-scripts/net.modules.d/pppd.sh | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/net-scripts/net.modules.d/pppd.sh b/net-scripts/net.modules.d/pppd.sh new file mode 100644 index 0000000..97caf6b --- /dev/null +++ b/net-scripts/net.modules.d/pppd.sh @@ -0,0 +1,279 @@ +# Copyright (c) 2005-2006 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 + +# void pppd_depend(void) +# +# Sets up the dependancies for the module +pppd_depend() { + after interface + before dhcp + provide ppp +} + +# bool pppd_check_installed(void) +# +# Returns 1 if pppd is installed, otherwise 0 +pppd_check_installed() { + if [[ ! -x /usr/sbin/pppd ]] ; then + ${1:-false} && eerror "For PPP support, emerge net-dialup/ppp" + return 1 + fi + return 0 +} + +# char *pppd_regex_escape(char *string) +# +# Returns the supplied string with any special regex +# characters escaped so they don't provide regex intructions +# This may be a candidate for adding to /sbin/functions.sh or +# net-scripts functions at some point +pppd_regex_escape() { + local escaped_result="$*" + 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 [[ ! -s ${filepath} ]] ; then + echo '#'client$'\t'server$'\t'secret$'\t'IP addresses > "${filepath}" \ + && chmod 0600 "${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() { + ${IN_BACKGROUND} && return 0 + + 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 ${unit} ]] ; then + eerror "PPP requires a unit - use net.ppp[0-9] instead of net.ppp" + return 1 + fi + + # PPP requires a link to communicate over - normally a serial port + # PPPoE communicates over Ethernet + # PPPoA communicates over ATM + # In all cases, the link needs to be available before we start PPP + link="link_${ifvar}" + if [[ -z ${!link} ]] ; then + eerror "${link} 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 + username="username_${ifvar}" + password="password_${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 + opts="pppd_${ifvar}[@]" + opts="${!opts}" + + # We don't work with these options set by the user + for i in unit nodetach linkname ; do + if [[ " ${opts} " == *" ${i} "* ]] ; then + eerror "The option \"${i}\" is not allowed in pppd_${ifvar}" + return 1 + fi + done + + # Check for mtu/mru + local mtu="mtu_${ifvar}" + if [[ -n ${!mtu} ]] ; then + [[ " ${opts} " != *" mtu "* ]] && opts="${opts} mtu ${!mtu}" + [[ " ${opts} " != *" mru "* ]] && opts="${opts} mru ${!mtu}" + fi + + # Set linkname because we need /var/run/ppp-${linkname}.pid + # This pidfile has the advantage of being there, even if ${iface} interface was never started + opts="linkname ${iface} ${opts}" + + # 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 unit + opts="unit ${unit} ${opts}" + + # Default maxfail to 0 unless specified + [[ " ${opts} " != *" maxfail "* ]] && opts="${opts} maxfail 0" + + # Append persist + [[ " ${opts} " != *" persist "* ]] && opts="${opts} persist" + + # Setup connect script + local chat="chat_${ifvar}[@]" + if [[ -n "${!chat}" ]] ; then + local chatopts="/usr/sbin/chat -e -E -v" + local -a phone_number="phone_number_${ifvar}[@]" + phone_number=( "${!phone_number}" ) + if [[ ${#phone_number[@]} -ge 1 ]] ; then + chatopts="${chatopts} -T '${phone_number[0]}'" + if [[ ${#phone_number[@]} -ge 2 ]] ; then + chatopts="${chatopts} -U '${phone_number[1]}'" + fi + fi + opts="${opts} connect $(requote "${chatopts} $(requote "${!chat}")")" + fi + + # Add plugins + local plugins="plugins_${ifvar}[@]" + for i in "${!plugins}" ; do + local -a plugin=( ${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 + + #Specialized stuff. Insert here actions particular to connection type (pppoe,pppoa,capi) + local insert_link_in_opts=1 + if [[ " ${opts} " == *" plugin rp-pppoe.so "* ]] ; then + if [[ ! -e /proc/net/pppoe ]] ; then + # Load the PPPoE kernel module + if ! modprobe pppoe ; then + eerror "kernel does not support PPPoE" + return 1 + fi + fi + + # Ensure that the link exists and is up + interface_exists "${!link}" true || return 1 + interface_up "${!link}" + + insert_link_in_opts=0 + fi + + if [[ " ${opts} " == *" plugin pppoatm.so "* ]] ; then + if [[ ! -d /proc/net/atm ]] ; then + # Load the PPPoA kernel module + if ! modprobe pppoatm ; then + eerror "kernel does not support PPPoATM" + return 1 + fi + fi + fi + [[ ${insert_link_in_opts} -eq 0 ]] || opts="${!link} ${opts}" + + ebegin "Running pppd" + mark_service_inactive "net.${iface}" + eval start-stop-daemon --start --exec /usr/sbin/pppd \ + --pidfile "/var/run/ppp-${iface}.pid" -- "${opts}" >/dev/null + if [[ $? != "0" ]] ; then + eend $? "Failed to start PPP" + mark_service_starting "net.${iface}" + return $? + fi + + if [[ " ${opts} " == *" updetach "* ]] ; then + local addr="$(interface_get_address "${iface}")" + einfo "${iface} received address ${addr}" + else + einfo "Backgrounding ..." + fi + + # pppd will re-call us when we bring the interface up + exit 0 +} + +# 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() { + ${IN_BACKGROUND} && return 0 + local iface="$1" pidfile="/var/run/ppp-$1.pid" + + [[ ! -s ${pidfile} ]] && return 0 + + einfo "Stopping pppd on ${iface}" + start-stop-daemon --stop --exec /usr/sbin/pppd --pidfile "${pidfile}" + eend $? +} + +# vim: set ft=sh ts=4 : |