39f58789e6
use only committed uci changes for updating routing table use functions.sh functions rather than uci command line tool to find interfaces for routing table. consolidate rtmon_ipv4 and rtmon_ipv6 functions into a single function Signed-off-by: Aaron Goodman <aaronjg@stanford.edu>
109 lines
2.8 KiB
Bash
Executable file
109 lines
2.8 KiB
Bash
Executable file
#!/bin/sh
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. /lib/functions.sh
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. /lib/functions/network.sh
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. /lib/mwan3/mwan3.sh
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mwan3_rtmon_route_handle()
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{
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config_load mwan3
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local section action route_line family tbl device metric tos dst line
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local route_device tid
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route_line=${1##"Deleted "}
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route_family=$2
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if [ "$route_family" = "ipv4" ]; then
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IP="$IP4"
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elif [ "$route_family" = "ipv6" ] && [ $NO_IPV6 -eq 0 ]; then
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IP="$IP6"
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else
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return
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fi
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if [ "$route_line" == "$1" ]; then
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action="add"
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else
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action="del"
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fi
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# never add default route lines, since this is handled elsewhere
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[ -z "${route_line##default*}" ] && return
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[ -z "${route_line##::/0*}" ] && return
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route_line=${route_line%% linkdown*}
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route_line=${route_line%% unreachable*}
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mwan3_update_dev_to_table
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mwan3_route_line_dev "tid" "$route_line" "$route_family"
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handle_route() {
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tbl=$($IP route list table $tid)
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if [ $action = "add" ]; then
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echo "$tbl" | grep -q "^default\|^::/0" || return
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else
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[ -z "$tbl" ] && return
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fi
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# check that action needs to be performed. May not need to take action if:
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# Got a route update on ipv6 where route is already in the table
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# Got a delete event, but table was already flushed
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[ $action = "add" ] && [ -z "${tbl##*$route_line*}" ] && return
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[ $action = "del" ] && [ -n "${tbl##*$route_line*}" ] && return
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network_get_device device "$section"
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LOG debug "adjusting route $device: $IP route "$action" table $tid $route_line"
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$IP route "$action" table $tid $route_line ||
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LOG warn "failed: $IP route $action table $tid $route_line"
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}
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handle_route_cb(){
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let tid++
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config_get family "$section" family ipv4
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[ "$family" != "$route_family" ] && return
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handle_route
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}
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if [ $action = "add" ]; then
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## handle old routes from 'change' or 'replace'
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metric=${route_line##*metric }
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[ "$metric" = "$route_line" ] && unset metric || metric=${metric%% *}
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tos=${route_line##*tos }
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[ "$tos" = "$route_line" ] && unset tos || tos=${tos%% *}
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dst=${route_line%% *}
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grep_line="$dst ${tos:+tos $tos}.*table [0-9].*${metric:+metric $metric}"
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$IP route list table all | grep "$grep_line" | while read line; do
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tbl=${line##*table }
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tbl=${tbl%% *}
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[ $tbl -gt $MWAN3_INTERFACE_MAX ] && continue
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LOG debug "removing route on ip route change/replace: $line"
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$IP route del $line
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done
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fi
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if [ -n "$tid" ]; then
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handle_route
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else
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config_foreach handle_route_cb interface
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fi
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}
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main()
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{
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local IP family
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config_load mwan3
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family=$1
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[ -z $family ] && family=ipv4
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if [ "$family" = ipv6 ]; then
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IP="$IP6"
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else
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IP="$IP4"
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fi
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mwan3_init
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$IP monitor route | while read line; do
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[ -z "${line##*table*}" ] && continue
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LOG debug "handling route update $family $line"
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mwan3_lock "service" "mwan3rtmon"
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mwan3_rtmon_route_handle "$line" "$family"
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mwan3_unlock "service" "mwan3rtmon"
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done
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}
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main "$@"
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