#!/bin/sh
#----------------------------------------------------------------------------
# /etc/ppp/link-up - called whenever a bundle link goes online
#
# Input:
#   $1 = interface
#   $2 = circuit name
#   $3 = 0 if a non-master link goes online
#        <master-type> for a master link ($BUNDLE_MASTER_TYPE_REAL or
#                                         $BUNDLE_MASTER_TYPE_PSEUDO)
#
# Last Update:     $Id$
#----------------------------------------------------------------------------

. /etc/boot.d/networking.inc

script_name="link-up"
script="$script_name[$$]"
facility=$circuit_logfacility
logmsgprio=$facility.notice
. /usr/share/logfunc.sh

export PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin

interface=$1
circ_id=$2
master_type=$3
: ${master_type:=0}

{

if [ -n "$BUNDLE" ]
then
    # register link
    bundle_register_link $circ_id "$BUNDLE"
    circuit_read_field $circ_id circ_bundle

    if [ $master_type -eq 0 ]
    then
        # move link to correct bundle circuit if necessary; note that this does
        # not cause a race condition with ip-up-down which tries to determine
        # the correct bundle circuit, because the move only occurs for slave
        # links, and slave links do not cause <l3prot>-up/down scripts to be
        # called
        circ_master=$(bundle_map_bundle_to_master "$BUNDLE")
        if [ -n "$circ_master" ]
        then
            circ_old_bundle=$circ_bundle
            circuit_read_field $circ_master circ_bundle
            if [ "$circ_old_bundle" != "$circ_bundle" ]
            then
                echo "moving bundle link $circ_id[$interface] from bundle $circ_old_bundle to bundle $circ_bundle"
                circuit_attach_to_bundle $circ_id $circ_bundle
            fi
            # if a master link is terminated without terminating the bundle
            # (because other links are part of the bundle), and if this link
            # is redialled later, it will not become a master link again, but
            # we have to increase the reference count of the (old) master link
            # as otherwise the reference count will decrease by one each time
            # the non-master link goes down 
            [ $circ_id = $circ_master ] &&
                bundle_ref_master $circ_id
        fi
    else
        # register master circuit using an initial reference count of one
        bundle_register_master $circ_id $circ_bundle "$BUNDLE" $master_type
    fi

    echo "bundle link $circ_id[$interface] comes up"

    # link is online
    circuit_event_id=$circ_id \
        mom_unicast_message circd up_link_circuit_event >/dev/null

    # Call all custom link-ups
    for j in /etc/ppp/link-up[0-9][0-9][0-9].*
    do
        if [ -f $j ]
        then
            echo "executing $j"
            . $j
        fi
    done
else
    log_error "No BUNDLE set for link $circ_id[$interface], closing link"
    circuit_event_id=$circ_id \
    down_link_circuit_event_force_hangup=true \
        mom_unicast_message circd down_link_circuit_event >/dev/null
fi

} 2>&1 | logmsg "$script" $logmsgprio