From 48a95eff38ceaa13d497617ebd5e2201dd16ee77 Mon Sep 17 00:00:00 2001 From: Steven Barth Date: Fri, 12 Jun 2015 07:37:53 +0000 Subject: [PATCH] ppp : Unnumbered support Adds PPP unnumbered support via the parameter unnumbered which points to a logical OpenWRT interface. The PPP proto shell handler will "borrow" an IP address from the unnumbered interface (if multiple IP addresses are present the longest prefix different from 32 will be "borrowed") for which a host interface dependency will be created. Due to the host interface dependency the PPP unnumbered interface will only "borrow" an IP address from an interface which is up. The borrowed IP address will be shared as local IP address by the PPP daemon and no other local IP will be accepted from the peer in the IPCP negotiation. A typical use case is the usage of a public IP subnet on the Lan interface which will be shared by the PPP interface as local IP address. Signed-off-by: Hans Dedecker SVN-Revision: 45948 --- package/network/services/ppp/files/ppp.sh | 40 ++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) diff --git a/package/network/services/ppp/files/ppp.sh b/package/network/services/ppp/files/ppp.sh index 1a72a1e272..a6389a8b93 100755 --- a/package/network/services/ppp/files/ppp.sh +++ b/package/network/services/ppp/files/ppp.sh @@ -4,10 +4,35 @@ [ -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 @@ -53,12 +78,14 @@ ppp_generic_init_config() { 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="$1"; shift + local localip - json_get_vars ipv6 demand keepalive keepalive_adaptive username password pppd_options pppname + json_get_vars ipv6 demand keepalive keepalive_adaptive username password pppd_options pppname unnumbered if [ "$ipv6" = 0 ]; then ipv6="" elif [ -z "$ipv6" -o "$ipv6" = auto ]; then @@ -73,6 +100,16 @@ ppp_generic_setup() { 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##*[, ]}" @@ -86,6 +123,7 @@ ppp_generic_setup() { 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 \ -- 2.30.2