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map.sh 7.2 KB

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  1. #!/bin/sh
  2. # map.sh - IPv4-in-IPv6 tunnel backend
  3. #
  4. # Author: Steven Barth <cyrus@openwrt.org>
  5. # Copyright (c) 2014 cisco Systems, Inc.
  6. #
  7. # This program is free software; you can redistribute it and/or modify
  8. # it under the terms of the GNU General Public License version 2
  9. # as published by the Free Software Foundation
  10. #
  11. # This program is distributed in the hope that it will be useful,
  12. # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. # GNU General Public License for more details.
  15. [ -n "$INCLUDE_ONLY" ] || {
  16. . /lib/functions.sh
  17. . /lib/functions/network.sh
  18. . ../netifd-proto.sh
  19. init_proto "$@"
  20. }
  21. proto_map_setup() {
  22. local cfg="$1"
  23. local iface="$2"
  24. local link="map-$cfg"
  25. # uncomment for legacy MAP0 mode
  26. #export LEGACY=1
  27. local type mtu ttl tunlink zone
  28. local rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
  29. json_get_vars type mtu ttl tunlink zone
  30. json_get_vars rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
  31. [ -z "$zone" ] && zone="wan"
  32. [ -z "$type" ] && type="map-e"
  33. [ -z "$ip4prefixlen" ] && ip4prefixlen=32
  34. ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
  35. # fixme: handle RA/DHCPv6 address race for LW
  36. [ "$type" = lw4o6 ] && sleep 5
  37. if [ -z "$rule" ]; then
  38. rule="type=$type,ipv6prefix=$ip6prefix,prefix6len=$ip6prefixlen,ipv4prefix=$ipaddr,prefix4len=$ip4prefixlen"
  39. [ -n "$psid" ] && rule="$rule,psid=$psid"
  40. [ -n "$psidlen" ] && rule="$rule,psidlen=$psidlen"
  41. [ -n "$offset" ] && rule="$rule,offset=$offset"
  42. [ -n "$ealen" ] && rule="$rule,ealen=$ealen"
  43. if [ "$type" = "map-t" ]; then
  44. rule="$rule,dmr=$peeraddr"
  45. else
  46. rule="$rule,br=$peeraddr"
  47. fi
  48. fi
  49. echo "rule=$rule" > /tmp/map-$cfg.rules
  50. RULE_DATA=$(mapcalc ${tunlink:-\*} $rule)
  51. if [ "$?" != 0 ]; then
  52. proto_notify_error "$cfg" "INVALID_MAP_RULE"
  53. proto_block_restart "$cfg"
  54. return
  55. fi
  56. echo "$RULE_DATA" >> /tmp/map-$cfg.rules
  57. eval $RULE_DATA
  58. if [ -z "$RULE_BMR" ]; then
  59. proto_notify_error "$cfg" "NO_MATCHING_PD"
  60. proto_block_restart "$cfg"
  61. return
  62. fi
  63. k=$RULE_BMR
  64. if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
  65. proto_init_update "$link" 1
  66. proto_add_ipv4_address $(eval "echo \$RULE_${k}_IPV4ADDR") "" "" ""
  67. proto_add_tunnel
  68. json_add_string mode ipip6
  69. json_add_int mtu "${mtu:-1280}"
  70. json_add_int ttl "${ttl:-64}"
  71. json_add_string local $(eval "echo \$RULE_${k}_IPV6ADDR")
  72. json_add_string remote $(eval "echo \$RULE_${k}_BR")
  73. json_add_string link $(eval "echo \$RULE_${k}_PD6IFACE")
  74. if [ "$type" = "map-e" ]; then
  75. json_add_array "fmrs"
  76. for i in $(seq $RULE_COUNT); do
  77. [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
  78. fmr="$(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
  79. fmr="$fmr,$(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
  80. fmr="$fmr,$(eval "echo \$RULE_${i}_EALEN"),$(eval "echo \$RULE_${i}_OFFSET")"
  81. json_add_string "" "$fmr"
  82. done
  83. json_close_array
  84. fi
  85. proto_close_tunnel
  86. elif [ "$type" = "map-t" -a -f "/proc/net/nat46/control" ]; then
  87. proto_init_update "$link" 1
  88. local style="MAP"
  89. [ "$LEGACY" = 1 ] && style="MAP0"
  90. echo add $link > /proc/net/nat46/control
  91. local cfgstr="local.style $style local.v4 $(eval "echo \$RULE_${k}_IPV4PREFIX")/$(eval "echo \$RULE_${k}_PREFIX4LEN")"
  92. cfgstr="$cfgstr local.v6 $(eval "echo \$RULE_${k}_IPV6PREFIX")/$(eval "echo \$RULE_${k}_PREFIX6LEN")"
  93. cfgstr="$cfgstr local.ea-len $(eval "echo \$RULE_${k}_EALEN") local.psid-offset $(eval "echo \$RULE_${k}_OFFSET")"
  94. cfgstr="$cfgstr remote.v4 0.0.0.0/0 remote.v6 $(eval "echo \$RULE_${k}_DMR") remote.style RFC6052 remote.ea-len 0 remote.psid-offset 0"
  95. echo config $link $cfgstr > /proc/net/nat46/control
  96. for i in $(seq $RULE_COUNT); do
  97. [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
  98. local cfgstr="remote.style $style remote.v4 $(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
  99. cfgstr="$cfgstr remote.v6 $(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
  100. cfgstr="$cfgstr remote.ea-len $(eval "echo \$RULE_${i}_EALEN") remote.psid-offset $(eval "echo \$RULE_${i}_OFFSET")"
  101. echo insert $link $cfgstr > /proc/net/nat46/control
  102. done
  103. else
  104. proto_notify_error "$cfg" "UNSUPPORTED_TYPE"
  105. proto_block_restart "$cfg"
  106. fi
  107. proto_add_ipv4_route "0.0.0.0" 0
  108. proto_add_data
  109. [ "$zone" != "-" ] && json_add_string zone "$zone"
  110. json_add_array firewall
  111. if [ -z "$(eval "echo \$RULE_${k}_PORTSETS")" ]; then
  112. json_add_object ""
  113. json_add_string type nat
  114. json_add_string target SNAT
  115. json_add_string family inet
  116. json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
  117. json_close_object
  118. else
  119. for portset in $(eval "echo \$RULE_${k}_PORTSETS"); do
  120. for proto in icmp tcp udp; do
  121. json_add_object ""
  122. json_add_string type nat
  123. json_add_string target SNAT
  124. json_add_string family inet
  125. json_add_string proto "$proto"
  126. json_add_boolean connlimit_ports 1
  127. json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
  128. json_add_string snat_port "$portset"
  129. json_close_object
  130. done
  131. done
  132. fi
  133. if [ "$type" = "map-t" ]; then
  134. json_add_object ""
  135. json_add_string type rule
  136. json_add_string family inet6
  137. json_add_string proto all
  138. json_add_string direction in
  139. json_add_string dest "$zone"
  140. json_add_string src "$zone"
  141. json_add_string src_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
  142. json_add_string target ACCEPT
  143. json_close_object
  144. json_add_object ""
  145. json_add_string type rule
  146. json_add_string family inet6
  147. json_add_string proto all
  148. json_add_string direction out
  149. json_add_string dest "$zone"
  150. json_add_string src "$zone"
  151. json_add_string dest_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
  152. json_add_string target ACCEPT
  153. json_close_object
  154. proto_add_ipv6_route $(eval "echo \$RULE_${k}_IPV6ADDR") 128
  155. fi
  156. json_close_array
  157. proto_close_data
  158. proto_send_update "$cfg"
  159. if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
  160. json_init
  161. json_add_string name "${cfg}_"
  162. json_add_string ifname "@$(eval "echo \$RULE_${k}_PD6IFACE")"
  163. json_add_string proto "static"
  164. json_add_array ip6addr
  165. json_add_string "" "$(eval "echo \$RULE_${k}_IPV6ADDR")"
  166. json_close_array
  167. json_close_object
  168. ubus call network add_dynamic "$(json_dump)"
  169. fi
  170. }
  171. proto_map_teardown() {
  172. local cfg="$1"
  173. local link="map-$cfg"
  174. json_get_var type type
  175. [ -z "$type" ] && type="map-e"
  176. case "$type" in
  177. "map-e"|"lw4o6") ifdown "${cfg}_" ;;
  178. "map-t") [ -f "/proc/net/nat46/control" ] && echo del $link > /proc/net/nat46/control ;;
  179. esac
  180. rm -f /tmp/map-$cfg.rules
  181. }
  182. proto_map_init_config() {
  183. no_device=1
  184. available=1
  185. proto_config_add_string "rule"
  186. proto_config_add_string "ipaddr"
  187. proto_config_add_int "ip4prefixlen"
  188. proto_config_add_string "ip6prefix"
  189. proto_config_add_int "ip6prefixlen"
  190. proto_config_add_string "peeraddr"
  191. proto_config_add_int "psidlen"
  192. proto_config_add_int "psid"
  193. proto_config_add_int "offset"
  194. proto_config_add_string "tunlink"
  195. proto_config_add_int "mtu"
  196. proto_config_add_int "ttl"
  197. proto_config_add_string "zone"
  198. }
  199. [ -n "$INCLUDE_ONLY" ] || {
  200. add_protocol map
  201. }