Added syslog server functionality

plugins/dynamix/SyslogSettings.page

@@ -0,0 +1,90 @@
+Menu="NetworkServices"
+Title="Syslog Server"
+Icon="file-text-o"
+Tag="file-text-o"
+---
+<?PHP
+/* Copyright 2005-2018, Lime Technology
+ * Copyright 2012-2018, Bergware International.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+?>
+<?
+$syslog = @(array)parse_ini_file('/boot/config/rsyslog.cfg');
+?>
+<style>
+select.m130{margin-left:135px}
+select.m30{margin-left:35px}
+</style>
+<script>
+function localFolder(state) {
+  if (state) $('#local_folder').show(); else $('#local_folder').hide();
+}
+$(function(){
+  localFolder(document.syslog.local_server.value);
+});
+</script>
+
+<form markdown="1" name="syslog" method="POST" action="/update.php" target="progressFrame">
+<input type="hidden" name="#file" value="/boot/config/rsyslog.cfg">
+<input type="hidden" name="#command" value="/webGui/scripts/rsyslog_config">
+
+Local syslog server:
+: <select name="local_server" class="narrow" size="1" onchange="localFolder(this.value)">
+  <?=mk_option($syslog['local_server'], "", "Disabled")?>
+  <?=mk_option($syslog['local_server'], "1", "Enabled")?>
+  </select>
+  <select name="server_protocol" class="narrow m130" size="1">
+  <?=mk_option($syslog['server_protocol'], "udp", "UDP")?>
+  <?=mk_option($syslog['server_protocol'], "tcp", "TCP")?>
+  <?=mk_option($syslog['server_protocol'], "both", "Both")?>
+  </select>
+  <input type="text" name="server_port" class="trim" value="<?=$syslog['server_port']?>" maxlength="4" placeholder="514">
+
+> Let the server act as a central syslog server and collect syslog messages from other systems.
+> The server can listen on UDP, TCP or both with a selectable port number.
+>
+> Syslog information is stored per IP address. That is every system gets its own syslog file.
+
+<div markdown="1" id="local_folder" style="display:none">
+Local syslog folder:
+: <input type="text" name="server_folder" value="<?=$syslog['server_folder']?>" placeholder="/mnt/user/system">
+
+> Enter the name of the local folder to store syslog information.
+> By default this is set to /mnt/user/system
+>
+> *Important: make sure the folder EXIST when changing this field*
+
+</div>
+
+Remote syslog server:
+: <input type="text" name="remote_server" class="narrow" value="<?=$syslog['remote_server']?>" maxlength="23" placeholder="name or ip address">
+  <select name="remote_protocol" class="narrow m30" size="1">
+  <?=mk_option($syslog['remote_protocol'], "udp", "UDP")?>
+  <?=mk_option($syslog['remote_protocol'], "tcp", "TCP")?>
+  </select>
+  <input type="text" name="remote_port" class="trim" value="<?=$syslog['remote_port']?>" maxlength="4" placeholder="514">
+
+> Enter a name or IP address of a remote syslog server.
+> This will send a copy of the syslog messages to the designated server.
+
+Mirror syslog to flash:
+: <select name="syslog_flash" class="narrow" size="1">
+  <?=mk_option($syslog['syslog_flash'], "", "No")?>
+  <?=mk_option($syslog['syslog_flash'], "1", "Yes")?>
+  </select>
+
+> This setting is OFF by default and must be used with care to avoid unnecessary wear and tear of the USB device.
+>
+> Change this setting to YES when troubleshooting is required and it is not possible to get the regular diagnostics information.
+> A mirror of the syslog file is stored in the **logs** folder of the flash device.
+
+&nbsp;
+: <input type="submit" value="Apply" disabled><input type="button" value="Done" onclick="done()">
+</form>

plugins/dynamix/scripts/rsyslog_config

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+CONF=/boot/config/rsyslog.conf
+ETC=/etc/rsyslog.conf
+
+# read settings
+source /boot/config/rsyslog.cfg
+
+# create local ruleset
+if ! grep -q '^\$RuleSet local$' $ETC; then
+  sed -ri '/^# limetech - everything goes to syslog.$/a $RuleSet local' $ETC
+  sed -ri '/^#?news.notice.*$/a $DefaultRuleset local' $ETC
+fi
+
+# local syslog server
+if [[ -n $local_server ]]; then
+  if [[ $server_protocol == tcp || $server_protocol == both ]]; then
+    sed -ri "s/^#?(\\\$ModLoad imtcp)/\1/;s/^#?(\\\$InputTCPServerRun) [0-9]+/\1 ${server_port:-514}/" $ETC
+    [[ $server_protocol == tcp ]] && sed -ri 's/^\$(ModLoad imudp|UDPServerRun)/#\$\1/' $ETC
+  fi
+  if [[ $server_protocol == udp || $server_protocol == both ]]; then
+    sed -ri "s/^#?(\\\$ModLoad imudp)/\1/;s/^#?(\\\$UDPServerRun) [0-9]+/\1 ${server_port:-514}/" $ETC
+    [[ $server_protocol == udp ]] && sed -ri 's/^\$(ModLoad imtcp|InputTCPServerRun)/#\$\1/' $ETC
+  fi
+  if grep -q '^\$template remote,' $ETC; then
+    sed -ri '/^\$RuleSet remote$/d;/^\*\.\* \?remote$/d;/^\$template remote,".*"$/d' $ETC
+  fi
+  sed -ri "/^#?\\\$UDPServerRun [0-9]+.*$/a \\\$template remote,\"${server_folder:-/mnt/user/system}/syslog-%FROMHOST-IP%\"" $ETC
+  sed -ri '/^# #+ Remote Logging/i $RuleSet remote\n*.* ?remote' $ETC
+else
+  sed -ri 's/^#?\$(ModLoad imtcp|InputTCPServerRun|ModLoad imudp|UDPServerRun)/#\$\1/' $ETC
+  sed -ri '/^\$RuleSet remote$/d;/^\*\.\* \?remote$/d;/^\$template remote,".*"$/d' $ETC
+fi
+
+# remote syslog server
+if [[ -n $remote_server ]]; then
+  [[ $remote_protocol == udp ]] && com='@' || com='@@'
+  sed -ri "s/^#?(\*\.\*) @@?.*:[0-9]+$/\1 $com$remote_server:${remote_port:-514}/" $ETC
+else
+  sed -ri 's/^#?(\*\.\* @@?.*:[0-9]+)$/#\1/' $ETC
+fi
+
+# mirror syslog to flash
+if [[ -n $syslog_flash ]]; then
+  if ! grep -q '^\$template flash,' $ETC; then
+    sed -ri '/^#?\$UDPServerRun [0-9]+.*$/a $template flash,"/boot/logs/syslog"' $ETC
+    sed -ri '/^\*\.debug .*syslog$/a *.debug ?flash' $ETC
+  fi
+else
+  sed -ri '/^\$template flash,"\/boot\/logs\/syslog"$/d;/^\*\.debug \?flash/d' $ETC
+fi
+
+# copy conf to flash (read settings on reboot)
+cp -f $ETC $CONF
+
+# update syslog daemon
+/etc/rc.d/rc.rsyslogd restart &> /dev/null