package/base-files/files/lib/functions/network.sh

   1 . /usr/share/libubox/jshn.sh
   2
   3 __network_set_cache()
   4 {
   5         if [ -n "$3" ]; then
   6                 eval "export -- __NETWORK_CV_$1='$3'"
   7                 __NETWORK_CACHE="${__NETWORK_CACHE:+$__NETWORK_CACHE }__NETWORK_CV_$1"
   8         elif json_get_var "__NETWORK_CV_$1" "$2"; then
   9                 __NETWORK_CACHE="${__NETWORK_CACHE:+$__NETWORK_CACHE }__NETWORK_CV_$1"
  10         fi
  11 }
  12
  13 __network_export()
  14 {
  15         local __v="__NETWORK_CV_$2"
  16         eval "export -- \"$1=\${$__v:+\$$__v$3}\"; [ -n \"\${$__v+x}\" ]"
  17 }
  18
  19 __network_parse_ifstatus()
  20 {
  21         local __iface="$1"
  22         local __key="${__iface}"
  23         local __tmp
  24         local __old_ns
  25
  26         __network_export __tmp "${__key}__parsed" && return 0
  27         __tmp="$(ubus call network.interface."$__iface" status 2>/dev/null)"
  28         [ -n "$__tmp" ] || return 1
  29
  30         json_set_namespace "network" __old_ns
  31         json_load "$__tmp"
  32
  33         __network_set_cache "${__key}__parsed" "" "1"
  34
  35         for __tmp in "" "_inactive"; do
  36
  37                 __key="${__key}${__tmp}"
  38
  39                 # parse addresses
  40                 local __family
  41                 for __family in 4 6; do
  42                         if json_get_type __tmp "ipv${__family}_address" && [ "$__tmp" = array ]; then
  43
  44                                 json_select "ipv${__family}_address"
  45
  46                                 if json_get_type __tmp 1 && [ "$__tmp" = object ]; then
  47
  48                                         json_select 1
  49                                         __network_set_cache "${__key}_address${__family}" address
  50                                         __network_set_cache "${__key}_mask${__family}"    mask
  51                                         json_select ".."
  52
  53                                 fi
  54
  55                                 json_select ".."
  56
  57                         fi
  58                 done
  59
  60                 # parse routes
  61                 if json_get_type __tmp route && [ "$__tmp" = array ]; then
  62
  63                         json_select "route"
  64
  65                         local __idx=1
  66                         while json_get_type __tmp "$__idx" && [ "$__tmp" = object ]; do
  67
  68                                 json_select "$((__idx++))"
  69                                 json_get_var __tmp target
  70
  71                                 case "${__tmp}" in
  72                                         0.0.0.0)
  73                                                 __network_set_cache "${__key}_gateway4" nexthop
  74                                         ;;
  75                                         ::)
  76                                                 __network_set_cache "${__key}_gateway6" nexthop
  77                                         ;;
  78                                 esac
  79
  80                                 json_select ".."
  81
  82                         done
  83
  84                         json_select ".."
  85
  86                 fi
  87
  88                 # parse dns info
  89                 local __field
  90                 for __field in "dns_server" "dns_search"; do
  91                         if json_get_type __tmp "$__field" && [ "$__tmp" = array ]; then
  92
  93                                 json_select "$__field"
  94
  95                                 local __idx=1
  96                                 local __dns=""
  97
  98                                 while json_get_type __tmp "$__idx" && [ "$__tmp" = string ]; do
  99
 100                                         json_get_var __tmp "$((__idx++))"
 101                                         __dns="${__dns:+$__dns }$__tmp"
 102
 103                                 done
 104
 105                                 json_select ".."
 106
 107                                 if [ -n "$__dns" ]; then
 108                                         __network_set_cache "${__key}_${__field}" "" "$__dns"
 109                                 fi
 110                         fi
 111                 done
 112
 113                 # parse up state, device and physdev
 114                 for __field in "up" "l3_device" "device"; do
 115                         if json_get_type __tmp "$__field"; then
 116                                 __network_set_cache "${__key}_${__field}" "$__field"
 117                         fi
 118                 done
 119
 120                 # descend into inactive table
 121                 json_get_type __tmp "inactive" && [ "$__tmp" = object ] && json_select "inactive"
 122
 123         done
 124
 125         json_cleanup
 126         json_set_namespace "$__old_ns"
 127
 128         return 0
 129 }
 130
 131
 132 __network_ipaddr()
 133 {
 134         local __var="$1"
 135         local __iface="$2"
 136         local __family="$3"
 137         local __prefix="$4"
 138         local __tmp
 139
 140         __network_parse_ifstatus "$__iface" || return 1
 141
 142         if [ $__prefix -eq 1 ]; then
 143                 __network_export __tmp "${__iface}_mask${__family}" && \
 144                         __network_export "$__var" "${__iface}_address${__family}" "/$__tmp"
 145                 return $?
 146         fi
 147
 148         __network_export "$__var" "${__iface}_address${__family}"
 149         return $?
 150
 151 }
 152
 153 # determine IPv4 address of given logical interface
 154 # 1: destination variable
 155 # 2: interface
 156 network_get_ipaddr()  { __network_ipaddr "$1" "$2" 4 0; }
 157
 158 # determine IPv6 address of given logical interface
 159 # 1: destination variable
 160 # 2: interface
 161 network_get_ipaddr6() { __network_ipaddr "$1" "$2" 6 0; }
 162
 163 # determine IPv4 subnet of given logical interface
 164 # 1: destination variable
 165 # 2: interface
 166 network_get_subnet()  { __network_ipaddr "$1" "$2" 4 1; }
 167
 168 # determine IPv6 subnet of given logical interface
 169 # 1: destination variable
 170 # 2: interface
 171 network_get_subnet6() { __network_ipaddr "$1" "$2" 6 1; }
 172
 173
 174 __network_gateway()
 175 {
 176         local __var="$1"
 177         local __iface="$2"
 178         local __family="$3"
 179         local __inactive="$4"
 180
 181         __network_parse_ifstatus "$__iface" || return 1
 182
 183         if [ "$__inactive" = 1 -o "$__inactive" = "true" ]; then
 184                 __network_export "$__var" "${__iface}_inactive_gateway${__family}" && \
 185                         return 0
 186         fi
 187
 188         __network_export "$__var" "${__iface}_gateway${__family}"
 189         return $?
 190 }
 191
 192 # determine IPv4 gateway of given logical interface
 193 # 1: destination variable
 194 # 2: interface
 195 # 3: consider inactive gateway if "true" (optional)
 196 network_get_gateway()  { __network_gateway "$1" "$2" 4 "${3:-0}"; }
 197
 198 # determine  IPv6 gateway of given logical interface
 199 # 1: destination variable
 200 # 2: interface
 201 # 3: consider inactive gateway if "true" (optional)
 202 network_get_gateway6() { __network_gateway "$1" "$2" 6 "${3:-0}"; }
 203
 204
 205 __network_dns() {
 206         local __var="$1"
 207         local __iface="$2"
 208         local __field="$3"
 209         local __inactive="$4"
 210
 211         __network_parse_ifstatus "$__iface" || return 1
 212
 213         if [ "$__inactive" = 1 -o "$__inactive" = "true" ]; then
 214                 __network_export "$__var" "${__iface}_inactive_${__field}" && \
 215                         return 0
 216         fi
 217
 218         __network_export "$__var" "${__iface}_${__field}"
 219         return $?
 220 }
 221
 222 # determine the DNS servers of the given logical interface
 223 # 1: destination variable
 224 # 2: interface
 225 # 3: consider inactive servers if "true" (optional)
 226 network_get_dnsserver() { __network_dns "$1" "$2" dns_server "${3:-0}"; }
 227
 228 # determine the domains of the given logical interface
 229 # 1: destination variable
 230 # 2: interface
 231 # 3: consider inactive domains if "true" (optional)
 232 network_get_dnssearch() { __network_dns "$1" "$2" dns_search "${3:-0}"; }
 233
 234
 235 __network_wan()
 236 {
 237         local __var="$1"
 238         local __family="$2"
 239         local __inactive="$3"
 240         local __iface
 241
 242         for __iface in $(ubus list | sed -ne 's/^network\.interface\.//p'); do
 243                 if [ "$__iface" != loopback ]; then
 244                         if __network_gateway "$__var" "$__iface" "$__family" "$__inactive"; then
 245                                 eval "export -- \"$__var=$__iface\""
 246                                 return 0
 247                         fi
 248                 fi
 249         done
 250
 251         eval "export -- \"$__var=\""
 252         return 1
 253 }
 254
 255 # find the logical interface which holds the current IPv4 default route
 256 # 1: destination variable
 257 # 2: consider inactive default routes if "true" (optional)
 258 network_find_wan()  { __network_wan "$1" 4 "${2:-0}"; }
 259
 260 # find the logical interface which holds the current IPv6 default route
 261 # 1: destination variable
 262 # 2: consider inactive dafault routes if "true" (optional)
 263 network_find_wan6() { __network_wan "$1" 6 "${2:-0}"; }
 264
 265
 266 __network_device()
 267 {
 268         local __var="$1"
 269         local __iface="$2"
 270         local __field="$3"
 271
 272         __network_parse_ifstatus "$__iface" || return 1
 273         __network_export "$__var" "${__iface}_${__field}"
 274         return $?
 275 }
 276
 277 # test whether the given logical interface is running
 278 # 1: interface
 279 network_is_up()
 280 {
 281         local __up
 282         __network_device __up "$1" up && [ $__up -eq 1 ]
 283 }
 284
 285 # determine the layer 3 linux network device of the given logical interface
 286 # 1: destination variable
 287 # 2: interface
 288 network_get_device()  { __network_device "$1" "$2" l3_device; }
 289
 290 # determine the layer 2 linux network device of the given logical interface
 291 # 1: destination variable
 292 # 2: interface
 293 network_get_physdev() { __network_device "$1" "$2" device;    }
 294
 295
 296 __network_defer()
 297 {
 298         local __device="$1"
 299         local __defer="$2"
 300
 301         json_init
 302         json_add_string name "$__device"
 303         json_add_boolean defer "$__defer"
 304
 305         ubus call network.device set_state "$(json_dump)" 2>/dev/null
 306 }
 307
 308 # defer netifd actions on the given linux network device
 309 # 1: device name
 310 network_defer_device() { __network_defer "$1" 1; }
 311
 312 # continue netifd actions on the given linux network device
 313 # 1: device name
 314 network_ready_device() { __network_defer "$1" 0; }
 315
 316 # flush the internal value cache to force re-reading values from ubus
 317 network_flush_cache()
 318 {
 319         local __tmp
 320         for __tmp in $__NETWORK_CACHE __NETWORK_CACHE; do
 321                 unset "$__tmp"
 322         done
 323 }