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1600ba99e4
- support reading inactive gateways and DNS information in network_get_gateway(), network_get_dnsserver() and network_get_dnssearch() by passing "true" as optional last argument - internally cache fetched values to speed up subsequent accesses to the same data, introduce network_flush_cache() to clear them - add some inline function documentation SVN-Revision: 34722
294 lines
6.3 KiB
Bash
294 lines
6.3 KiB
Bash
. /usr/share/libubox/jshn.sh
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__network_switch_inactive()
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{
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local __tmp
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if [ "$1" = 0 ] || [ "$1" = false ]; then
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return 1
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fi
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json_get_type __tmp "inactive"
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if [ "$__tmp" = object ]; then
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json_select "inactive"
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fi
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}
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__network_set_cache()
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{
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__NETWORK_CACHE="${__NETWORK_CACHE:+$__NETWORK_CACHE }__NETWORK_CV_$1"
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eval "__NETWORK_CV_$1='\$$2'"
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}
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__network_get_cache()
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{
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eval "[ -n \"\${__NETWORK_CV_$1+x}\" ] && export -- \"$2=\$__NETWORK_CV_$1\""
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}
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__network_ipaddr()
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{
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local __var="$1"
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local __iface="$2"
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local __family="$3"
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local __prefix="$4"
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local __key="ipaddr_${2}_${3}_${4}"
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__network_get_cache "$__key" "$__var" && return 0
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local __tmp="$(ubus call network.interface."$__iface" status 2>/dev/null)"
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json_load "${__tmp:-{}}"
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json_get_type __tmp "ipv${__family}_address"
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if [ "$__tmp" = array ]; then
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json_select "ipv${__family}_address"
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json_get_type __tmp 1
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if [ "$__tmp" = object ]; then
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json_select 1
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json_get_var $__var address
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[ $__prefix -gt 0 ] && {
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json_get_var __tmp mask
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eval "export -- \"$__var=\${$__var}/$__tmp\""
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}
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__network_set_cache "$__key" "$__var"
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return 0
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fi
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fi
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return 1
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}
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# determine IPv4 address of given logical interface
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# 1: destination variable
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# 2: interface
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network_get_ipaddr() { __network_ipaddr "$1" "$2" 4 0; }
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# determine IPv6 address of given logical interface
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# 1: destination variable
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# 2: interface
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network_get_ipaddr6() { __network_ipaddr "$1" "$2" 6 0; }
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# determine IPv4 subnet of given logical interface
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# 1: destination variable
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# 2: interface
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network_get_subnet() { __network_ipaddr "$1" "$2" 4 1; }
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# determine IPv6 subnet of given logical interface
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# 1: destination variable
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# 2: interface
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network_get_subnet6() { __network_ipaddr "$1" "$2" 6 1; }
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__network_gateway()
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{
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local __var="$1"
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local __iface="$2"
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local __family="$3"
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local __key="gateway_${2}_${3}"
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__network_get_cache "$__key" "$__var" && return 0
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local __tmp="$(ubus call network.interface."$__iface" status 2>/dev/null)"
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json_load "${__tmp:-{}}"
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for __tmp in 0 1; do
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if json_get_type __tmp route && [ "$__tmp" = array ]; then
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json_select route
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local __idx=1
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while json_get_type __tmp "$__idx" && [ "$__tmp" = object ]; do
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json_select "$((__idx++))"
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json_get_var __tmp target
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case "${__family}/${__tmp}" in
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4/0.0.0.0|6/::)
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json_get_var "$__var" nexthop
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__network_set_cache "$__key" "$__var"
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return $?
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;;
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esac
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json_select ".."
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done
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json_select ".."
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fi
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__network_switch_inactive "$4" || break
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done
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return 1
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}
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# determine IPv4 gateway of given logical interface
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# 1: destination variable
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# 2: interface
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# 3: consider inactive gateway if "true" (optional)
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network_get_gateway() { __network_gateway "$1" "$2" 4 "${3:-0}"; }
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# determine IPv6 gateway of given logical interface
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# 1: destination variable
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# 2: interface
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# 3: consider inactive gateway if "true" (optional)
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network_get_gateway6() { __network_gateway "$1" "$2" 6 "${3:-0}"; }
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__network_dns() {
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local __var="$1"
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local __iface="$2"
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local __field="$3"
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local __key="dns_${2}_${3}"
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__network_get_cache "$__key" "$__var" && return 0
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local __tmp="$(ubus call network.interface."$__iface" status 2>/dev/null)"
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local __dns=""
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json_load "${__tmp:-{}}"
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for __tmp in 0 1; do
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if json_get_type __tmp "$__field" && [ "$__tmp" = array ]; then
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json_select "$__field"
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local __idx=1
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while json_get_type __tmp "$__idx" && [ "$__tmp" = string ]; do
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json_get_var __tmp "$((__idx++))"
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__dns="${__dns:+$__dns }$__tmp"
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done
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json_select ".."
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fi
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__network_switch_inactive "$4" || break
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done
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if [ -n "$__dns" ]; then
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eval "export -- \"$__var=$__dns\""
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__network_set_cache "$__key" "$__var"
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fi
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}
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# determine the DNS servers of the given logical interface
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# 1: destination variable
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# 2: interface
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# 3: consider inactive servers if "true" (optional)
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network_get_dnsserver() { __network_dns "$1" "$2" dns_server "${3:-0}"; }
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# determine the domains of the given logical interface
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# 1: destination variable
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# 2: interface
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# 3: consider inactive servers if "true" (optional)
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network_get_dnssearch() { __network_dns "$1" "$2" dns_search "${3:-0}"; }
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__network_wan() {
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local __var="$1"
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local __family="$2"
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local __key="wan_${2}"
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local __iface
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__network_get_cache "$__key" "$__var" && return 0
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for __iface in $(ubus list | sed -ne 's/^network\.interface\.//p'); do
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if __network_gateway "$__var" "$__iface" "$__family"; then
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eval "export -- \"$__var=$__iface\""
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__network_set_cache "$__key" "$__var"
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return 0
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fi
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done
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eval "export -- \"$__var=\""
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return 1
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}
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# find the logical interface which holds the current IPv4 default route
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# 1: destination variable
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network_find_wan() { __network_wan "$1" 4; }
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# find the logical interface which holds the current IPv6 default route
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# 1: destination variable
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network_find_wan6() { __network_wan "$1" 6; }
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__network_device()
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{
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local __var="$1"
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local __iface="$2"
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local __field="$3"
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local __key="device_${2}_${3}"
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__network_get_cache "$__key" "$__var" && return 0
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local __tmp="$(ubus call network.interface."$__iface" status 2>/dev/null)"
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[ -n "$__tmp" ] || return 1
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json_load "$__tmp"
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json_get_var "$__var" "$__field" && __network_set_cache "$__key" "$__var"
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}
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# test whether the given logical interface is running
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# 1: interface
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network_is_up()
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{
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local __up
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__network_device __up "$1" up && [ $__up -eq 1 ]
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}
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# determine the layer 3 linux network device of the given logical interface
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# 1: destination variable
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# 2: interface
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network_get_device() { __network_device "$1" "$2" l3_device; }
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# determine the layer 2 linux network device of the given logical interface
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# 1: destination variable
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# 2: interface
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network_get_physdev() { __network_device "$1" "$2" device; }
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__network_defer()
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{
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local __device="$1"
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local __defer="$2"
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json_init
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json_add_string name "$__device"
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json_add_boolean defer "$__defer"
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ubus call network.device set_state "$(json_dump)" 2>/dev/null
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}
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# defer netifd actions on the given linux network device
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# 1: device name
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network_defer_device() { __network_defer "$1" 1; }
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# continue netifd actions on the given linux network device
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# 1: device name
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network_ready_device() { __network_defer "$1" 0; }
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# flush the internal value cache to force re-reading values from ubus
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network_flush_cache()
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{
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local __tmp
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for __tmp in $__NETWORK_CACHE __NETWORK_CACHE; do
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unset "$__tmp"
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done
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}
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