From 732876299f4dccb4caa3a915879d2b5945bbdd42 Mon Sep 17 00:00:00 2001
From: makefu <github@syntax-fehler.de>
Date: Wed, 2 Apr 2014 11:15:54 +0200
Subject: filehooker is now elchOS

---
 elchos/root-image/krebs/lib/retiolum | 99 ++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 elchos/root-image/krebs/lib/retiolum

(limited to 'elchos/root-image/krebs/lib/retiolum')

diff --git a/elchos/root-image/krebs/lib/retiolum b/elchos/root-image/krebs/lib/retiolum
new file mode 100644
index 00000000..1e55041c
--- /dev/null
+++ b/elchos/root-image/krebs/lib/retiolum
@@ -0,0 +1,99 @@
+#!/bin/sh
+# retiolum host functions
+#@include core
+#@include network
+tinc_path=${tinc_path:-/etc/tinc}
+netname=${netname:-retiolum}
+hosts_dir=${hosts_dir:-$tinc_path/$netname/hosts}
+supernode_urls="http://euer.krebsco.de/retiolum/supernodes.tar.gz"
+reload_tinc(){
+  info "reloading tinc configuration"
+  pkill -HUP tincd || tinc -n $netname reload;
+}
+
+refresh_supernode_keys(){
+  for url in $supernode_urls;do
+    info "Trying $url to retrieve supernodes"
+    if http_get "$url" \
+       | tar xvz -C $hosts_dir | xargs -n1 echo "refreshed:" ;then
+      info "refreshed supernode keys"
+      return 0
+    else
+      error "$url unusable for retrieving supernode host files"
+    fi
+  done && return 1
+}
+
+find_supernodes(){
+  cd $hosts_dir
+  set +f
+  for name in `
+    grep '^[  ]*Address[  ]*=' * |
+      cut -d: -f1 | sort | uniq
+  `; do
+    if eval "`sed -n '
+        s/[   ]\+//g
+        s/^\(Address\|Port\)=\(.*\)/\1="\${\1+\$\1\n}\2"/p
+      ' $name`"; then
+      port=${Port-655}
+      for host in $Address; do
+        if nc -zw 2 $host $port 2>/dev/null; then
+          echo "$name [('$host', $port)]"
+        fi &
+      done
+      wait
+    fi &
+  done
+  wait
+  cd - >/dev/null
+}
+
+find_active_nodes(){
+  # TODO this function currently only supports a single address for a host
+  cd $hosts_dir
+  # posix grep does not support [[:space:]]
+  set +f
+  for name in `
+    grep '^[  ]*Address[  ]*=' * |
+      cut -d: -f1 | sort | uniq
+  `; do
+    if eval "`sed -n '
+        s/[   ]\+//g
+        s/^\(Address\|Port\)=\(.*\)/\1="\${\1+\$\1\n}\2"/p
+      ' $name`"; then
+      port=${Port-655}
+      for host in $Address; do
+        if nc -zw 2 $host $port 2>/dev/null; then
+          echo "$name [('$host', $port)]"
+        fi &
+      done
+      wait
+    fi &
+  done
+  wait
+  cd - >/dev/null
+}
+
+check_free_v4(){
+  myipv4=${1-10.243.0.-1}
+  v4num=${myipv4##*.}
+  printf "Retard check: "
+  if [ "$v4num" -gt 0 -a "$v4num" -lt "256" ];
+  then 
+    info "No retard detected\n"
+    cd $hosts_dir
+    info "Check if ip is still free: "
+    for i in `ls -1`; do
+      if grep -q -e $myipv4\$ $i ;then
+        error "Host IP already taken by $i! "
+        return 1
+      fi
+    done
+    info "Passed\n"
+    return 0
+  else
+    error "you are made of stupid. bailing out\n" 
+    return 1
+  fi
+  cd - >/dev/null
+}
-- 
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