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Merge pull request #932 from f0o/issue-931

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Allow alerting on tables with relative/indirect glues.
This commit is contained in:
Neil Lathwood 2015-05-07 21:18:02 +01:00
commit 48ea557c5a
2 changed files with 100 additions and 4 deletions
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4
alerts.php
View File

@ -82,7 +82,7 @@ function IsRuleValid($device,$rule) {
*/
function RunFollowUp() {
global $config;
foreach( dbFetchRows("SELECT alerts.device_id, alerts.rule_id, alerts.state FROM alerts LEFT JOIN alert_rules ON alerts.rule_id = alert_rules.id WHERE alerts.state != 2 && alerts.open = 0") as $alert ) {
foreach( dbFetchRows("SELECT alerts.device_id, alerts.rule_id, alerts.state FROM alerts WHERE alerts.state != 2 && alerts.state > 0 && alerts.open = 0") as $alert ) {
$tmp = array($alert['rule_id'],$alert['device_id']);
$alert = dbFetchRow("SELECT alert_log.id,alert_log.rule_id,alert_log.device_id,alert_log.state,alert_log.details,alert_log.time_logged,alert_rules.rule,alert_rules.severity,alert_rules.extra,alert_rules.name FROM alert_log,alert_rules WHERE alert_log.rule_id = alert_rules.id && alert_log.device_id = ? && alert_log.rule_id = ? && alert_rules.disabled = 0 ORDER BY alert_log.id DESC LIMIT 1",array($alert['device_id'],$alert['rule_id']));
if( empty($alert['rule']) || !IsRuleValid($tmp[1],$tmp[0]) ) {
@ -125,7 +125,7 @@ function RunFollowUp() {
function RunAlerts() {
global $config;
$default_tpl = "%title\r\nSeverity: %severity\r\n{if %state == 0}Time elapsed: %elapsed\r\n{/if}Timestamp: %timestamp\r\nUnique-ID: %uid\r\nRule: {if %name}%name{else}%rule{/if}\r\n{if %faults}Faults:\r\n{foreach %faults} #%key: %value.string\r\n{/foreach}{/if}Alert sent to: {foreach %contacts}%value <%key> {/foreach}"; //FIXME: Put somewhere else?
foreach( dbFetchRows("SELECT alerts.device_id, alerts.rule_id, alerts.state FROM alerts LEFT JOIN alert_rules ON alerts.rule_id = alert_rules.id WHERE alerts.state != 2 && alerts.open = 1") as $alert ) {
foreach( dbFetchRows("SELECT alerts.device_id, alerts.rule_id, alerts.state FROM alerts WHERE alerts.state != 2 && alerts.open = 1") as $alert ) {
$tmp = array($alert['rule_id'],$alert['device_id']);
$alert = dbFetchRow("SELECT alert_log.id,alert_log.rule_id,alert_log.device_id,alert_log.state,alert_log.details,alert_log.time_logged,alert_rules.rule,alert_rules.severity,alert_rules.extra,alert_rules.name FROM alert_log,alert_rules WHERE alert_log.rule_id = alert_rules.id && alert_log.device_id = ? && alert_log.rule_id = ? && alert_rules.disabled = 0 ORDER BY alert_log.id DESC LIMIT 1",array($alert['device_id'],$alert['rule_id']));
if( empty($alert['rule_id']) || !IsRuleValid($tmp[1],$tmp[0]) ) {

100
includes/alerts.inc.php
View File

@ -33,6 +33,7 @@ include_once($config['install_dir'].'/html/includes/authentication/'.$config['au
function GenSQL($rule) {
$rule = RunMacros($rule);
if( empty($rule) ) {
//Cannot resolve Macros due to recursion. Rule is invalid.
return false;
}
//Pretty-print rule to dissect easier
@ -49,12 +50,42 @@ function GenSQL($rule) {
}
}
$tables = array_keys(array_flip($tables));
$x = sizeof($tables);
if( dbFetchCell('SELECT 1 FROM information_schema.COLUMNS WHERE TABLE_NAME = ? && COLUMN_NAME = ?',array($tables[0],'device_id')) != 1 ) {
//Our first table has no valid glue, append the 'devices' table to it!
array_unshift($tables, 'devices');
}
$x = sizeof($tables)-1;
$i = 0;
$join = "";
while( $i < $x ) {
if( isset($tables[$i+1]) ) {
$join .= $tables[$i].".device_id = ".$tables[$i+1].".device_id && ";
if( dbFetchCell('SELECT 1 FROM information_schema.COLUMNS WHERE TABLE_NAME = ? && COLUMN_NAME = ?',array($tables[$i+1],'device_id')) == 1 ) {
//Found valid glue in definition.
$join .= $tables[$i].".device_id = ".$tables[$i+1].".device_id && ";
} else {
//No valid glue, Resolve a glue-chain.
$gtmp = ResolveGlues(array($tables[$i+1]),'device_id');
if( $gtmp === false ) {
//Cannot resolve glue-chain. Rule is invalid.
return false;
}
$last = "";
$qry = "";
foreach( $gtmp as $glue ) {
if( empty($last) ) {
list($tmp,$last) = explode('.',$glue);
$qry .= $glue.' = ';
} else {
list($tmp,$new) = explode('.',$glue);
$qry .= $tmp.'.'.$last.' && '.$tmp.'.'.$new.' = ';
$last = $new;
}
if( !in_array($tmp, $tables) ) {
$tables[] = $tmp;
}
}
$join .= "( ".$qry.$tables[0].".device_id ) && ";
}
}
$i++;
}
@ -62,9 +93,68 @@ function GenSQL($rule) {
return $sql;
}
/**
* Create a glue-chain
* @param array $tables Initial Tables to construct glue-chain
* @param string $target Glue to find (usual device_id)
* @param int $x Recursion Anchor
* @param array $hist History of processed tables
* @param array $last Glues on the fringe
* @return string|boolean
*/
function ResolveGlues($tables,$target,$x=0,$hist=array(),$last=array()) {
if( sizeof($tables) == 1 && $x != 0 ) {
if( dbFetchCell('SELECT 1 FROM information_schema.COLUMNS WHERE TABLE_NAME = ? && COLUMN_NAME = ?',array($tables[0],$target)) == 1 ) {
return array_merge($last,array($tables[0].'.'.$target));
} else {
return false;
}
} else {
$x++;
if( $x > 30 ) {
//Too much recursion. Abort.
return false;
}
foreach( $tables as $table ) {
$glues = dbFetchRows('SELECT COLUMN_NAME FROM information_schema.COLUMNS WHERE TABLE_NAME = ? && COLUMN_NAME LIKE "%\_id"',array($table));
if( sizeof($glues) == 1 && $glues[0]['COLUMN_NAME'] != $target ) {
//Search for new candidates to expand
$tmp = dbFetchRows('SELECT TABLE_NAME FROM information_schema.TABLES WHERE TABLE_NAME LIKE "'.substr($table,0,-1).'_%" && TABLE_NAME != "'.$table.'"');
$ntables = array();
foreach( $tmp as $expand ) {
$ntables[] = $expand['TABLE_NAME'];
}
$tmp = ResolveGlues($ntables,$target,$x++,array_merge($tables,$ntables),array_merge($last,array($table.'.'.$glues[0]['COLUMN_NAME'])));
if( is_array($tmp) ) {
return $tmp;
}
} else {
foreach( $glues as $glue ) {
if( $glue['COLUMN_NAME'] == $target ) {
return array_merge($last,array($table.'.'.$target));
} else {
list($tmp) = explode('_',$glue['COLUMN_NAME']);
$tmp .= 's';
if( !in_array($tmp,$tables) && !in_array($tmp,$hist) ) {
//Expand table
$tmp = ResolveGlues(array($tmp),$target,$x++,array_merge($tables,array($tmp)),array_merge($last,array($table.'.'.$glue['COLUMN_NAME'])));
if( is_array($tmp) ) {
return $tmp;
}
}
}
}
}
}
}
//You should never get here.
return false;
}
/**
* Process Macros
* @param string $rule Rule to process
* @param int $x Recursion-Anchor
* @return string|boolean
*/
function RunMacros($rule,$x=1) {
@ -196,6 +286,12 @@ function GetContacts($results) {
$uids = array();
foreach( $results as $result ) {
$tmp = NULL;
if( is_numeric($result["bill_id"]) ) {
$tmpa = dbFetchRows("SELECT user_id FROM bill_perms WHERE bill_id = ?",array($result["bill_id"]));
foreach( $tmpa as $tmp ) {
$uids[$tmp['user_id']] = $tmp['user_id'];
}
}
if( is_numeric($result["port_id"]) ) {
$tmpa = dbFetchRows("SELECT user_id FROM ports_perms WHERE access_level >= 0 AND port_id = ?",array($result["port_id"]));
foreach( $tmpa as $tmp ) {