IPMonitorParser.m   [plain text]

/*
* Copyright (c) 2018 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/

#import <Foundation/Foundation.h>
#import <EventFactory/EventFactory.h>

#import "IPMonitorParser.h"

#define TokenInterfaceNameV6 "interfaceNameV6"
#define TokenAddressAction "addressAction"
#define TokenAddressAction6 "addressAction6"
#define TokenAddress "address"
#define TokenAddress6 "address6"
#define TokenServiceID "serviceID"
#define TokenV4Changes "v4Changes"
#define TokenV6Changes "v6Changes"

@interface IPMonitorParser ()
@property (readonly, nonatomic) NSRegularExpression *netChangeRegex;
@end

@implementation IPMonitorParser

- (instancetype)init
{
NSError *regexError = nil;
_netChangeRegex = [[NSRegularExpression alloc] initWithPattern:@"(?<"TokenInterfaceName">\\w+)(?<"TokenAddressAction">[\\+\\-\\!\\/\\\\]?)(:(?<"TokenAddress">[:.0-9a-f]+))?" options:0 error:&regexError];
if (_netChangeRegex == nil) {
specs_log_err("Failed to create the network change regex: %@", regexError);
return nil;
}

NSArray<EFLogEventMatch *> *matches = @[
[[EFLogEventMatch alloc] initWithPattern:@"\\d+. (?<"TokenInterfaceName">\\w+) serviceID=(?<"TokenServiceID">[-\\w]+) addr=(?<"TokenAddress">) rank=\\w+"
newEventHandler:
^EFEvent *(NSTextCheckingResult *matchResult, EFLogEvent *logEvent, BOOL *isComplete) {
*isComplete = YES;
EFNetworkControlPathEvent *newEvent = nil;
NSString *serviceID = [logEvent substringForCaptureGroup:@TokenServiceID inMatchResult:matchResult];
NSString *addressString = [logEvent substringForCaptureGroup:@TokenAddress inMatchResult:matchResult];
if (serviceID != nil && addressString != nil) {
newEvent = [self createInterfaceEventWithLogEvent:logEvent matchResult:matchResult];
if (newEvent != nil) {
newEvent.serviceID = serviceID;
[self addAddress:addressString toInterfaceEvent:newEvent];
}
}
return newEvent;
}],
[[EFLogEventMatch alloc] initWithPattern:@"network changed:( v4\\((?<"TokenV4Changes">[^\\)]+)\\))?( v6\\((?<"TokenV6Changes">[^\\)]+)\\))?"
multipleNewEventHandler:
^NSArray<EFEvent *> *(NSTextCheckingResult *matchResult, EFLogEvent *logEvent) {
NSMutableDictionary<NSString *, EFNetworkControlPathEvent *> *newEventsMap = nil;
NSArray<NSString *> *tokens = @[ @TokenV4Changes, @TokenV6Changes ];
for (NSString *token in tokens) {
BOOL isIPv4 = [token isEqualToString:@TokenV4Changes];
NSString *changes = [logEvent substringForCaptureGroup:token inMatchResult:matchResult];
if (changes == nil) {
continue;
}
NSArray<NSTextCheckingResult *> *matches = [self.netChangeRegex matchesInString:changes options:0 range:NSMakeRange(0, changes.length)];
BOOL isPrimary = YES;
for (NSTextCheckingResult *match in matches) {
NSString *interfaceName = [self substringOfString:changes forCaptureGroup:@TokenInterfaceName inMatchResult:match];
NSString *addressAction = [self substringOfString:changes forCaptureGroup:@TokenAddressAction inMatchResult:match];
NSString *address = [self substringOfString:changes forCaptureGroup:@TokenAddress inMatchResult:match];

if (interfaceName == nil || address.length == 0) {
continue;
}

EFNetworkControlPathEvent *event = newEventsMap[interfaceName];
if (event == nil) {
event = [self createInterfaceEventWithLogEvent:logEvent interfaceName:interfaceName];
if (newEventsMap == nil) {
newEventsMap = [[NSMutableDictionary alloc] init];
}
newEventsMap[interfaceName] = event;
}

if (addressAction.length > 0 && [addressAction isEqualToString:@"-"]) {
if (isPrimary) {
if (isIPv4) {
event.primaryStateIPv4 = EFPrimaryStateNotPrimary;
} else {
event.primaryStateIPv6 = EFPrimaryStateNotPrimary;
}
}
[self removeAddress:address fromInterfaceEvent:event];
} else {
if (isPrimary) {
if (isIPv4) {
event.primaryStateIPv4 = EFPrimaryStatePrimary;
} else {
event.primaryStateIPv6 = EFPrimaryStatePrimary;
}
for (NSString *otherInterfaceName in SCLogParser.interfaceMap) {
if ([otherInterfaceName isEqualToString:interfaceName]) {
continue;
}
EFNetworkControlPathEvent *otherEvent = newEventsMap[otherInterfaceName];
if (otherEvent == nil) {
otherEvent = [self createInterfaceEventWithLogEvent:logEvent interfaceName:otherInterfaceName];
if (newEventsMap == nil) {
newEventsMap = [[NSMutableDictionary alloc] init];
}
newEventsMap[otherInterfaceName] = otherEvent;
}
if (isIPv4) {
otherEvent.primaryStateIPv4 = EFPrimaryStateNotPrimary;
} else {
otherEvent.primaryStateIPv6 = EFPrimaryStateNotPrimary;
}
}
isPrimary = NO;
}
[self addAddress:address toInterfaceEvent:event];
}
}
}
return newEventsMap.allValues;
}],
];
EFLogEventParser *parser = [[EFLogEventParser alloc] initWithMatches:matches];
return [super initWithCategory:@"IPMonitor" eventParser:parser];
}

@end