things

1 files changed, 147 insertions, 0 deletions

diff --git a/setup.sh b/setup.sh
new file mode 100755
index 0000000..c03fb10
--- /dev/null
+++ b/setup.sh
@@ -0,0 +1,147 @@
+#!/bin/sh
+
+run() {
+  printf '$ \x1b[32;1m%s\x1b[0m\n' "$*"
+  "$@"
+}
+step() {
+  printf '\x1b[34;1m>> %s\x1b[0m\n' "$*"
+}
+
+getval() {
+  /usr/local/bin/config.awk /config/inet2.conf "$@"
+}
+
+haskey() {
+  getval interface | while read -r inter; do
+    if getval "interface $inter" "$1"; then
+      echo "true"
+      return
+    fi
+  done
+}
+
+# ensure the /run/inet2 directory is empty (docker doesn't mount tmpfs to /run)
+# /run/inet2 is used for storage during runtime - restarting the container should clear it
+rm -rf /run/inet2 2>/dev/null
+mkdir /run/inet2
+
+# ensure the /var/lib/inet2 directory exists
+# /var/lib/inet2 is used for storage for the entire lifetime of the container - restarting the container shouldn't clear it
+if [ ! -d /var/lib/inet2 ]; then
+  mkdir -p /var/lib/inet2
+fi
+
+# these are disabled in the docker netns
+step "Enabling IPv6"
+run sysctl net.ipv6.conf.all.disable_ipv6=0 net.ipv6.conf.default.disable_ipv6=0 net.ipv6.conf.all.forwarding=1
+
+ospf="$(haskey OSPF)"
+
+escapebird() {
+	sed -e 's/\\/\\\\/g;s/"/\\"/g'
+}
+
+if [ -n "$ospf" ]; then
+  step "Creating Bird configuration"
+  
+  touch /var/log/bird.log
+  chown bird:bird /var/log/bird.log
+  
+  selfas=$(getval AS)
+  (
+    cat <<EOF
+log "/var/log/bird.log" all;
+
+$(getval RouterID | while read -r line; do echo "router id $line;"; done)
+
+protocol kernel {
+  ipv4 {
+    export filter { if source ~ [RTS_BGP, RTS_OSPF, RTS_OSPF_IA, RTS_OSPF_EXT1, RTS_OSPF_EXT2] then accept; else reject; };
+    import all;
+  };
+  learn;
+  scan time 10;
+}
+protocol kernel {
+  ipv6 {
+    export filter { if source ~ [RTS_BGP, RTS_OSPF, RTS_OSPF_IA, RTS_OSPF_EXT1, RTS_OSPF_EXT2] then accept; else reject; };
+    import all;
+  };
+  learn;
+  scan time 10;
+}
+protocol device {
+}
+
+protocol direct {
+  ipv4;
+  ipv6;
+}
+
+
+EOF
+    if [ -n "$ospf" ]; then
+      interfacelist=$(
+        echo "  area 0 {"
+        echo "    interface \"lo\" { stub; };"
+        getval interface | while read -r inter; do
+          val="$(getval "interface $inter" OSPF)"
+          if [ "$?" = "0" ]; then
+            echo "    interface \"$(printf "%s" "$inter" | escapebird)\" {"
+            if [ -n "$val" ]; then
+              echo "      $val;";
+            fi
+            echo "    };"
+          fi
+        done
+        echo "  };"
+      )
+
+      cat <<EOF
+protocol ospf v3 ospf4 {
+  ipv4 {
+    import all;
+    export filter { if source ~ [RTS_DEVICE, RTS_INHERIT] then accept; else reject; };
+  };
+$interfacelist
+}
+protocol ospf v3 ospf6 {
+  ipv6 {
+    import all;
+    export filter { if source ~ [RTS_DEVICE, RTS_INHERIT] then accept; else reject; };
+  };
+$interfacelist
+}
+EOF
+  ) > /etc/bird.conf
+  chown root:bird /etc/bird.conf
+  chmod 640 /etc/bird.conf
+  
+  step "Enabling BIRD"
+  run rc-update add bird
+fi
+
+if [ ! -f /var/lib/inet2/setupDone ]; then
+  if [ -f /config/setup.sh ]; then
+    step "Running /config/setup.sh"
+    /config/setup.sh
+  fi
+  touch /var/lib/inet2/setupDone
+fi
+
+if [ -f /config/start.sh ]; then
+  step "Running /config/start.sh"
+  /config/start.sh
+fi
+
+if [ "$#" = "0" ]; then
+  step "Starting OpenRC"
+  rm -rf /run/openrc 2>/dev/null
+  mkdir /run/openrc
+  touch /run/openrc/softlevel
+  exec /sbin/openrc
+else
+  "$@"
+fi
+