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$4}$3}\"; [ -n \"\${$__v+x}\" ]"
  17 }
  18
  19 __network_parse_ifstatus()
  20 {
  21         local __iface="$1"
  22         local __key="${__iface}"
  23         local __tmp
  24         local __idx
  25         local __list
  26         local __old_ns
  27
  28         case "$__iface" in
  29                 *[^a-zA-Z0-9_]*) return 1 ;;
  30         esac
  31
  32         __network_export __tmp "${__key}__parsed" && return 0
  33         __tmp="$(ubus call network.interface."$__iface" status 2>/dev/null)"
  34         [ -n "$__tmp" ] || return 1
  35
  36         json_set_namespace "network" __old_ns
  37         json_load "$__tmp"
  38
  39         __network_set_cache "${__key}__parsed" "" "1"
  40
  41         for __tmp in "" "_inactive"; do
  42
  43                 __key="${__key}${__tmp}"
  44
  45                 # parse addresses
  46                 local __family
  47                 for __family in 4 6; do
  48
  49                         __list=""
  50
  51                         if json_is_a "ipv${__family}_address" array; then
  52
  53                                 json_select "ipv${__family}_address"
  54
  55                                 __idx=1
  56
  57                                 while json_is_a "$__idx" object; do
  58
  59                                         json_select "$((__idx++))"
  60                                         json_get_var __tmp "address" && __list="${__list:+$__list }$__tmp"
  61                                         json_get_var __tmp "mask"    && __list="${__list:+$__list/}$__tmp"
  62                                         json_select ".."
  63
  64                                 done
  65
  66                                 json_select ".."
  67
  68                         fi
  69
  70                         if json_is_a "ipv${__family}_prefix_assignment" array; then
  71
  72                                 json_select "ipv${__family}_prefix_assignment"
  73
  74                                 __idx=1
  75
  76                                 while json_is_a "$__idx" object; do
  77
  78                                         json_select "$((__idx++))"
  79                                         json_get_var __tmp "address" && __list="${__list:+$__list }${__tmp}1"
  80                                         json_get_var __tmp "mask"    && __list="${__list:+$__list/}$__tmp"
  81                                         json_select ".."
  82
  83                                 done
  84
  85                                 json_select ".."
  86
  87                         fi
  88
  89                         if [ -n "$__list" ]; then
  90                                 __network_set_cache "${__key}_address${__family}" "" "$__list"
  91                         fi
  92
  93                 done
  94
  95                 # parse prefixes
  96                 if json_is_a "ipv6_prefix" array; then
  97                         json_select "ipv6_prefix"
  98
  99                         __idx=1
 100                         __list=""
 101
 102                         while json_is_a "$__idx" object; do
 103
 104                                 json_select "$((__idx++))"
 105                                 json_get_var __tmp "address" && __list="${__list:+$__list }$__tmp"
 106                                 json_get_var __tmp "mask"    && __list="${__list:+$__list/}$__tmp"
 107                                 json_select ".."
 108
 109                         done
 110
 111                         json_select ".."
 112
 113
 114                         if [ -n "$__list" ]; then
 115                                 __network_set_cache "${__key}_prefix6" "" "$__list"
 116                         fi
 117
 118                 fi
 119
 120                 # parse routes
 121                 if json_is_a route array; then
 122
 123                         json_select "route"
 124
 125                         local __idx=1
 126                         while json_is_a "$__idx" object; do
 127
 128                                 json_select "$((__idx++))"
 129                                 json_get_var __tmp table
 130
 131                                 if [ -z "$__tmp" ]; then
 132                                         json_get_var __tmp target
 133
 134                                         case "${__tmp}" in
 135                                                 0.0.0.0)
 136                                                         __network_set_cache "${__key}_gateway4" nexthop
 137                                                 ;;
 138                                                 ::)
 139                                                         __network_set_cache "${__key}_gateway6" nexthop
 140                                                 ;;
 141                                         esac
 142                                 fi
 143
 144                                 json_select ".."
 145
 146                         done
 147
 148                         json_select ".."
 149
 150                 fi
 151
 152                 # parse dns info
 153                 local __field
 154                 for __field in "dns_server" "dns_search"; do
 155                         if json_is_a "$__field" array; then
 156
 157                                 json_select "$__field"
 158
 159                                 __idx=1
 160                                 __list=""
 161
 162                                 while json_is_a "$__idx" string; do
 163
 164                                         json_get_var __tmp "$((__idx++))"
 165                                         __list="${__list:+$__list }$__tmp"
 166
 167                                 done
 168
 169                                 json_select ".."
 170
 171                                 if [ -n "$__list" ]; then
 172                                         __network_set_cache "${__key}_${__field}" "" "$__list"
 173                                 fi
 174                         fi
 175                 done
 176
 177                 # parse up state, device and physdev
 178                 for __field in "up" "l3_device" "device"; do
 179                         if json_get_type __tmp "$__field"; then
 180                                 __network_set_cache "${__key}_${__field}" "$__field"
 181                         fi
 182                 done
 183
 184                 # descend into inactive table
 185                 json_is_a "inactive" object && json_select "inactive"
 186
 187         done
 188
 189         json_cleanup
 190         json_set_namespace "$__old_ns"
 191
 192         return 0
 193 }
 194
 195
 196 __network_ipaddr()
 197 {
 198         local __var="$1"
 199         local __iface="$2"
 200         local __field="$3"
 201         local __subst="$4"
 202         local __list="$5"
 203         local __tmp=""
 204
 205         __network_parse_ifstatus "$__iface" || return 1
 206
 207         if [ $__list = 1 ] && [ -n "$__subst" ]; then
 208                 __network_export "__list" "${__iface}_${__field}"
 209
 210                 for __list in $__list; do
 211                         eval "__tmp=\"${__tmp:+$__tmp }\${__list$__subst}\""
 212                 done
 213
 214                 export -- "$__var=$__tmp"; [ -n "$__tmp" ]
 215                 return $?
 216         fi
 217
 218         __network_export "$__var" "${__iface}_${__field}" "" "$__subst"
 219         return $?
 220 }
 221
 222 # determine first IPv4 address of given logical interface
 223 # 1: destination variable
 224 # 2: interface
 225 network_get_ipaddr()  { __network_ipaddr "$1" "$2" "address4" "%%/*" 0; }
 226
 227 # determine first IPv6 address of given logical interface
 228 # 1: destination variable
 229 # 2: interface
 230 network_get_ipaddr6() { __network_ipaddr "$1" "$2" "address6" "%%/*" 0; }
 231
 232 # determine first IPv4 subnet of given logical interface
 233 # 1: destination variable
 234 # 2: interface
 235 network_get_subnet()  { __network_ipaddr "$1" "$2" "address4" "%% *" 0; }
 236
 237 # determine first IPv6 subnet of given logical interface
 238 # 1: destination variable
 239 # 2: interface
 240 network_get_subnet6() { __network_ipaddr "$1" "$2" "address6" "%% *" 0; }
 241
 242 # determine first IPv6 prefix of given logical interface
 243 # 1: destination variable
 244 # 2: interface
 245 network_get_prefix6() { __network_ipaddr "$1" "$2" "prefix6" "%% *" 0; }
 246
 247 # determine all IPv4 addresses of given logical interface
 248 # 1: destination variable
 249 # 2: interface
 250 network_get_ipaddrs()  { __network_ipaddr "$1" "$2" "address4" "%%/*" 1; }
 251
 252 # determine all IPv6 addresses of given logical interface
 253 # 1: destination variable
 254 # 2: interface
 255 network_get_ipaddrs6() { __network_ipaddr "$1" "$2" "address6" "%%/*" 1; }
 256
 257 # determine all IPv4 subnets of given logical interface
 258 # 1: destination variable
 259 # 2: interface
 260 network_get_subnets()  { __network_ipaddr "$1" "$2" "address4" "" 1; }
 261
 262 # determine all IPv6 subnets of given logical interface
 263 # 1: destination variable
 264 # 2: interface
 265 network_get_subnets6() { __network_ipaddr "$1" "$2" "address6" "" 1; }
 266
 267 # determine all IPv6 prefixes of given logical interface
 268 # 1: destination variable
 269 # 2: interface
 270 network_get_prefixes6() { __network_ipaddr "$1" "$2" "prefix6" "" 1; }
 271
 272
 273 __network_gateway()
 274 {
 275         local __var="$1"
 276         local __iface="$2"
 277         local __family="$3"
 278         local __inactive="$4"
 279
 280         __network_parse_ifstatus "$__iface" || return 1
 281
 282         if [ "$__inactive" = 1 -o "$__inactive" = "true" ]; then
 283                 __network_export "$__var" "${__iface}_inactive_gateway${__family}" && \
 284                         return 0
 285         fi
 286
 287         __network_export "$__var" "${__iface}_gateway${__family}"
 288         return $?
 289 }
 290
 291 # determine IPv4 gateway of given logical interface
 292 # 1: destination variable
 293 # 2: interface
 294 # 3: consider inactive gateway if "true" (optional)
 295 network_get_gateway()  { __network_gateway "$1" "$2" 4 "${3:-0}"; }
 296
 297 # determine  IPv6 gateway of given logical interface
 298 # 1: destination variable
 299 # 2: interface
 300 # 3: consider inactive gateway if "true" (optional)
 301 network_get_gateway6() { __network_gateway "$1" "$2" 6 "${3:-0}"; }
 302
 303
 304 __network_dns() {
 305         local __var="$1"
 306         local __iface="$2"
 307         local __field="$3"
 308         local __inactive="$4"
 309
 310         __network_parse_ifstatus "$__iface" || return 1
 311
 312         if [ "$__inactive" = 1 -o "$__inactive" = "true" ]; then
 313                 __network_export "$__var" "${__iface}_inactive_${__field}" && \
 314                         return 0
 315         fi
 316
 317         __network_export "$__var" "${__iface}_${__field}"
 318         return $?
 319 }
 320
 321 # determine the DNS servers of the given logical interface
 322 # 1: destination variable
 323 # 2: interface
 324 # 3: consider inactive servers if "true" (optional)
 325 network_get_dnsserver() { __network_dns "$1" "$2" dns_server "${3:-0}"; }
 326
 327 # determine the domains of the given logical interface
 328 # 1: destination variable
 329 # 2: interface
 330 # 3: consider inactive domains if "true" (optional)
 331 network_get_dnssearch() { __network_dns "$1" "$2" dns_search "${3:-0}"; }
 332
 333
 334 __network_wan()
 335 {
 336         local __var="$1"
 337         local __family="$2"
 338         local __inactive="$3"
 339         local __iface
 340
 341         for __iface in $(ubus list | sed -ne 's/^network\.interface\.//p'); do
 342                 if [ "$__iface" != loopback ]; then
 343                         if __network_gateway "$__var" "$__iface" "$__family" "$__inactive"; then
 344                                 eval "export -- \"$__var=$__iface\""
 345                                 return 0
 346                         fi
 347                 fi
 348         done
 349
 350         eval "export -- \"$__var=\""
 351         return 1
 352 }
 353
 354 # find the logical interface which holds the current IPv4 default route
 355 # 1: destination variable
 356 # 2: consider inactive default routes if "true" (optional)
 357 network_find_wan()  { __network_wan "$1" 4 "${2:-0}"; }
 358
 359 # find the logical interface which holds the current IPv6 default route
 360 # 1: destination variable
 361 # 2: consider inactive dafault routes if "true" (optional)
 362 network_find_wan6() { __network_wan "$1" 6 "${2:-0}"; }
 363
 364
 365 __network_device()
 366 {
 367         local __var="$1"
 368         local __iface="$2"
 369         local __field="$3"
 370
 371         __network_parse_ifstatus "$__iface" || return 1
 372         __network_export "$__var" "${__iface}_${__field}"
 373         return $?
 374 }
 375
 376 # test whether the given logical interface is running
 377 # 1: interface
 378 network_is_up()
 379 {
 380         local __up
 381         __network_device __up "$1" up && [ $__up -eq 1 ]
 382 }
 383
 384 # determine the layer 3 linux network device of the given logical interface
 385 # 1: destination variable
 386 # 2: interface
 387 network_get_device()  { __network_device "$1" "$2" l3_device; }
 388
 389 # determine the layer 2 linux network device of the given logical interface
 390 # 1: destination variable
 391 # 2: interface
 392 network_get_physdev() { __network_device "$1" "$2" device;    }
 393
 394
 395 __network_defer()
 396 {
 397         local __device="$1"
 398         local __defer="$2"
 399
 400         json_init
 401         json_add_string name "$__device"
 402         json_add_boolean defer "$__defer"
 403
 404         ubus call network.device set_state "$(json_dump)" 2>/dev/null
 405 }
 406
 407 # defer netifd actions on the given linux network device
 408 # 1: device name
 409 network_defer_device() { __network_defer "$1" 1; }
 410
 411 # continue netifd actions on the given linux network device
 412 # 1: device name
 413 network_ready_device() { __network_defer "$1" 0; }
 414
 415 # flush the internal value cache to force re-reading values from ubus
 416 network_flush_cache()
 417 {
 418         local __tmp
 419         for __tmp in $__NETWORK_CACHE __NETWORK_CACHE; do
 420                 unset "$__tmp"
 421         done
 422 }