openwrtv3/package/network/services/ppp/files/ppp.sh

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#!/bin/sh
[ -x /usr/sbin/pppd ] || exit 0
[ -n "$INCLUDE_ONLY" ] || {
. /lib/functions.sh
. /lib/functions/network.sh
. ../netifd-proto.sh
init_proto "$@"
}
ppp_select_ipaddr()
{
local subnets=$1
local res
local res_mask
for subnet in $subnets; do
local addr="${subnet%%/*}"
local mask="${subnet#*/}"
if [ -n "$res_mask" -a "$mask" != 32 ]; then
[ "$mask" -gt "$res_mask" ] || [ "$res_mask" = 32 ] && {
res="$addr"
res_mask="$mask"
}
elif [ -z "$res_mask" ]; then
res="$addr"
res_mask="$mask"
fi
done
echo "$res"
}
ppp_exitcode_tostring()
{
local errorcode=$1
[ -n "$errorcode" ] || errorcode=5
case "$errorcode" in
0) echo "OK" ;;
1) echo "FATAL_ERROR" ;;
2) echo "OPTION_ERROR" ;;
3) echo "NOT_ROOT" ;;
4) echo "NO_KERNEL_SUPPORT" ;;
5) echo "USER_REQUEST" ;;
6) echo "LOCK_FAILED" ;;
7) echo "OPEN_FAILED" ;;
8) echo "CONNECT_FAILED" ;;
9) echo "PTYCMD_FAILED" ;;
10) echo "NEGOTIATION_FAILED" ;;
11) echo "PEER_AUTH_FAILED" ;;
12) echo "IDLE_TIMEOUT" ;;
13) echo "CONNECT_TIME" ;;
14) echo "CALLBACK" ;;
15) echo "PEER_DEAD" ;;
16) echo "HANGUP" ;;
17) echo "LOOPBACK" ;;
18) echo "INIT_FAILED" ;;
19) echo "AUTH_TOPEER_FAILED" ;;
20) echo "TRAFFIC_LIMIT" ;;
21) echo "CNID_AUTH_FAILED";;
*) echo "UNKNOWN_ERROR" ;;
esac
}
ppp_generic_init_config() {
proto_config_add_string username
proto_config_add_string password
proto_config_add_string keepalive
proto_config_add_boolean keepalive_adaptive
proto_config_add_int demand
proto_config_add_string pppd_options
proto_config_add_string 'connect:file'
proto_config_add_string 'disconnect:file'
proto_config_add_string ipv6
proto_config_add_boolean authfail
proto_config_add_int mtu
proto_config_add_string pppname
proto_config_add_string unnumbered
}
ppp_generic_setup() {
local config="$1"; shift
local localip
json_get_vars ipv6 demand keepalive keepalive_adaptive username password pppd_options pppname unnumbered
if [ "$ipv6" = 0 ]; then
ipv6=""
elif [ -z "$ipv6" -o "$ipv6" = auto ]; then
ipv6=1
proto_export "AUTOIPV6=1"
fi
if [ "${demand:-0}" -gt 0 ]; then
demand="precompiled-active-filter /etc/ppp/filter demand idle $demand"
else
demand=""
fi
[ -n "$mtu" ] || json_get_var mtu mtu
[ -n "$pppname" ] || pppname="${proto:-ppp}-$config"
[ -n "$unnumbered" ] && {
local subnets
( proto_add_host_dependency "$config" "" "$unnumbered" )
network_get_subnets subnets "$unnumbered"
localip=$(ppp_select_ipaddr "$subnets")
[ -n "$localip" ] || {
proto_block_restart "$config"
return
}
}
local lcp_failure="${keepalive%%[, ]*}"
local lcp_interval="${keepalive##*[, ]}"
local lcp_adaptive="lcp-echo-adaptive"
[ "${lcp_failure:-0}" -lt 1 ] && lcp_failure=""
[ "$lcp_interval" != "$keepalive" ] || lcp_interval=5
[ "${keepalive_adaptive:-1}" -lt 1 ] && lcp_adaptive=""
[ -n "$connect" ] || json_get_var connect connect
[ -n "$disconnect" ] || json_get_var disconnect disconnect
proto_run_command "$config" /usr/sbin/pppd \
nodetach ipparam "$config" \
ifname "$pppname" \
${localip:+$localip:} \
${lcp_failure:+lcp-echo-interval $lcp_interval lcp-echo-failure $lcp_failure $lcp_adaptive} \
${ipv6:++ipv6} \
nodefaultroute \
usepeerdns \
$demand maxfail 1 \
${username:+user "$username" password "$password"} \
${connect:+connect "$connect"} \
${disconnect:+disconnect "$disconnect"} \
ip-up-script /lib/netifd/ppp-up \
ipv6-up-script /lib/netifd/ppp-up \
ip-down-script /lib/netifd/ppp-down \
ipv6-down-script /lib/netifd/ppp-down \
${mtu:+mtu $mtu mru $mtu} \
"$@" $pppd_options
}
ppp_generic_teardown() {
local interface="$1"
local errorstring=$(ppp_exitcode_tostring $ERROR)
case "$ERROR" in
0)
;;
2)
proto_notify_error "$interface" "$errorstring"
proto_block_restart "$interface"
;;
11|19)
json_get_var authfail authfail
proto_notify_error "$interface" "$errorstring"
if [ "${authfail:-0}" -gt 0 ]; then
proto_block_restart "$interface"
fi
;;
*)
proto_notify_error "$interface" "$errorstring"
;;
esac
proto_kill_command "$interface"
}
# PPP on serial device
proto_ppp_init_config() {
proto_config_add_string "device"
ppp_generic_init_config
no_device=1
available=1
lasterror=1
}
proto_ppp_setup() {
local config="$1"
json_get_var device device
ppp_generic_setup "$config" "$device"
}
proto_ppp_teardown() {
ppp_generic_teardown "$@"
}
proto_pppoe_init_config() {
ppp_generic_init_config
proto_config_add_string "ac"
proto_config_add_string "service"
proto_config_add_string "host_uniq"
lasterror=1
}
proto_pppoe_setup() {
local config="$1"
local iface="$2"
for module in slhc ppp_generic pppox pppoe; do
/sbin/insmod $module 2>&- >&-
done
json_get_var mtu mtu
mtu="${mtu:-1492}"
json_get_var ac ac
json_get_var service service
json_get_var host_uniq host_uniq
ppp_generic_setup "$config" \
plugin rp-pppoe.so \
${ac:+rp_pppoe_ac "$ac"} \
${service:+rp_pppoe_service "$service"} \
${host_uniq:+host-uniq "$host_uniq"} \
"nic-$iface"
}
proto_pppoe_teardown() {
ppp_generic_teardown "$@"
}
proto_pppoa_init_config() {
ppp_generic_init_config
proto_config_add_int "atmdev"
proto_config_add_int "vci"
proto_config_add_int "vpi"
proto_config_add_string "encaps"
no_device=1
available=1
lasterror=1
}
proto_pppoa_setup() {
local config="$1"
local iface="$2"
for module in slhc ppp_generic pppox pppoatm; do
/sbin/insmod $module 2>&- >&-
done
json_get_vars atmdev vci vpi encaps
case "$encaps" in
1|vc) encaps="vc-encaps" ;;
*) encaps="llc-encaps" ;;
esac
ppp_generic_setup "$config" \
plugin pppoatm.so \
${atmdev:+$atmdev.}${vpi:-8}.${vci:-35} \
${encaps}
}
proto_pppoa_teardown() {
ppp_generic_teardown "$@"
}
proto_pptp_init_config() {
ppp_generic_init_config
proto_config_add_string "server"
proto_config_add_string "interface"
available=1
no_device=1
lasterror=1
}
proto_pptp_setup() {
local config="$1"
local iface="$2"
local ip serv_addr server interface
json_get_vars interface server
[ -n "$server" ] && {
for ip in $(resolveip -t 5 "$server"); do
( proto_add_host_dependency "$config" "$ip" $interface )
serv_addr=1
done
}
[ -n "$serv_addr" ] || {
echo "Could not resolve server address"
sleep 5
proto_setup_failed "$config"
exit 1
}
local load
for module in slhc ppp_generic ppp_async ppp_mppe ip_gre gre pptp; do
ppp: correct module loaded check in proto_pptp_setup proto_pptp_setup is responsible for loading the required modules to establish a pptp connection to a foreign peer. The function checks whether all required modules are already loaded, before actually loading them. It seems that the filter being used to accomplish this, is not restrictive enough in some cases. For instance when pptp nat helper modules are present on a system, and already loaded before a pptp connection is enabled. Then the search filter (possibly) returns the following for module=pptp, where actually no matches are expected, resulting in the pptp.ko module not being loaded, thereby failing to establish the pptp connection. # module="pptp" ; grep "$module" /proc/modules nf_nat_pptp 1312 0 - Live 0x86ce7000 nf_conntrack_pptp 3072 1 nf_nat_pptp, Live 0x86cb9000 nf_nat_proto_gre 784 1 nf_nat_pptp, Live 0x86cba000 nf_conntrack_proto_gre 2368 1 nf_conntrack_pptp, Live 0x86cbf000 nf_nat 9792 13 nf_nat_rtsp,nf_nat_tftp,nf_nat_sip,nf_nat_pptp,nf_nat_h323,nf_nat_proto_gre,nf_nat_amanda,nf_nat_irc,nf_nat_ftp,ipt_REDIRECT,ipt_NETMAP,ipt_MASQUERADE,iptable_nat, Live 0x86ca8000 nf_conntrack 37264 31 nf_nat_rtsp,nf_conntrack_rtsp,nf_nat_tftp,nf_conntrack_tftp,nf_nat_snmp_basic,nf_conntrack_snmp,nf_nat_sip,nf_conntrack_sip,nf_nat_pptp,nf_conntrack_pptp,nf_nat_h323,nf_conntrack_h323,nf_conntrack_proto_gre,nf_nat_amanda,nf_conntrack_amanda,nf_conntrack_broadcast,nf_nat_irc,nf_conntrack_irc,nf_nat_ftp,nf_conntrack_ftp,ipt_MASQUERADE,iptable_nat,nf_nat,xt_helper,xt_connmark,xt_connbytes,xt_conntrack,xt_CT,xt_NOTRACK,xt_state,nf_conntrack_ipv4, Live 0x86c90000 The search filter can be made more accurate/restrictive, by requiring the occurance of the exact name of the module at the beginning of a line in /proc/modules. # module="pptp" ; grep "^$module " /proc/modules pptp 13296 2 - Live 0x86e80000 Signed-off-by: Tijs Van Buggenhout <tvb@able.be> SVN-Revision: 38358
2013-10-10 14:58:12 +00:00
grep -q "^$module " /proc/modules && continue
/sbin/insmod $module 2>&- >&-
load=1
done
[ "$load" = "1" ] && sleep 1
ppp_generic_setup "$config" \
plugin pptp.so \
pptp_server $server \
file /etc/ppp/options.pptp
}
proto_pptp_teardown() {
ppp_generic_teardown "$@"
}
[ -n "$INCLUDE_ONLY" ] || {
add_protocol ppp
[ -f /usr/lib/pppd/*/rp-pppoe.so ] && add_protocol pppoe
[ -f /usr/lib/pppd/*/pppoatm.so ] && add_protocol pppoa
[ -f /usr/lib/pppd/*/pptp.so ] && add_protocol pptp
}