jens@0: //
jens@0: //  IPAddress.m
jens@0: //  MYNetwork
jens@0: //
jens@0: //  Created by Jens Alfke on 1/4/08.
jens@0: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@0: //
jens@0: 
jens@0: #import "IPAddress.h"
jens@1: 
jens@1: #import "Logging.h"
jens@1: #import "Test.h"
jens@1: 
jens@0: #import <sys/types.h>
jens@0: #import <sys/socket.h>
jens@0: #import <net/if.h>
jens@0: #import <netinet/in.h>
jens@0: #import <ifaddrs.h>
jens@1: #import <netdb.h>
jens@0: 
jens@0: 
jens@0: @implementation IPAddress
jens@0: 
jens@0: 
jens@0: + (UInt32) IPv4FromDottedQuadString: (NSString*)str
jens@0: {
jens@0:     Assert(str);
jens@0:     UInt32 ipv4 = 0;
jens@0:     NSScanner *scanner = [NSScanner scannerWithString: str];
jens@0:     for( int i=0; i<4; i++ ) {
jens@0:         if( i>0 && ! [scanner scanString: @"." intoString: nil] )
jens@0:             return 0;
jens@0:         NSInteger octet;
jens@0:         if( ! [scanner scanInteger: &octet] || octet<0 || octet>255 )
jens@0:             return 0;
jens@0:         ipv4 = (ipv4<<8) | octet;
jens@0:     }
jens@0:     if( ! [scanner isAtEnd] )
jens@0:         return 0;
jens@0:     return htonl(ipv4);
jens@0: }
jens@0:          
jens@0:          
jens@0: - (id) initWithHostname: (NSString*)hostname port: (UInt16)port
jens@0: {
jens@0:     Assert(hostname);
jens@0:     self = [super init];
jens@0:     if (self != nil) {
jens@0:         _ipv4 = [[self class] IPv4FromDottedQuadString: hostname];
jens@0:         if( ! _ipv4 ) {
jens@0:             [self release];
jens@0:             return [[HostAddress alloc] initWithHostname: hostname port: port];
jens@0:         }
jens@0:         _port = port;
jens@0:     }
jens@0:     return self;
jens@0: }
jens@0: 
jens@0: 
jens@0: - (id) initWithIPv4: (UInt32)ipv4 port: (UInt16)port
jens@0: {
jens@0:     self = [super init];
jens@0:     if (self != nil) {
jens@0:         _ipv4 = ipv4;
jens@0:         _port = port;
jens@0:     }
jens@0:     return self;
jens@0: }
jens@0: 
jens@0: - (id) initWithIPv4: (UInt32)ipv4
jens@0: {
jens@0:     return [self initWithIPv4: ipv4 port: 0];
jens@0: }
jens@0: 
jens@0: - (id) initWithSockAddr: (const struct sockaddr*)sockaddr
jens@0: {
jens@0:     if( sockaddr->sa_family == AF_INET ) {
jens@0:         const struct sockaddr_in *addr_in = (const struct sockaddr_in*)sockaddr;
jens@0:         return [self initWithIPv4: addr_in->sin_addr.s_addr port: ntohs(addr_in->sin_port)];
jens@0:     } else {
jens@0:         [self release];
jens@0:         return nil;
jens@0:     }
jens@0: }
jens@0: 
jens@0: + (IPAddress*) addressOfSocket: (CFSocketNativeHandle)socket
jens@0: {
jens@0:     uint8_t name[SOCK_MAXADDRLEN];
jens@0:     socklen_t namelen = sizeof(name);
jens@0:     struct sockaddr *addr = (struct sockaddr*)name;
jens@0:     if (0 == getpeername(socket, addr, &namelen))
jens@0:         return [[[self alloc] initWithSockAddr: addr] autorelease];
jens@0:     else
jens@0:         return nil;
jens@0: }    
jens@0: 
jens@0: - (id) copyWithZone: (NSZone*)zone
jens@0: {
jens@0:     return [self retain];
jens@0: }
jens@0: 
jens@0: - (void)encodeWithCoder:(NSCoder *)coder
jens@0: {
jens@0:     if( _ipv4 )
jens@0:         [coder encodeInt32: _ipv4 forKey: @"ipv4"];
jens@0:     if( _port )
jens@0:         [coder encodeInt: _port forKey: @"port"];
jens@0: }
jens@0: 
jens@0: - (id)initWithCoder:(NSCoder *)decoder
jens@0: {
jens@0:     self = [super init];
jens@0:     if( self ) {
jens@0:         _ipv4 = [decoder decodeInt32ForKey: @"ipv4"];
jens@0:         _port = [decoder decodeIntForKey: @"port"];
jens@0:     }
jens@0:     return self;
jens@0: }
jens@0: 
jens@0: 
jens@0: @synthesize ipv4=_ipv4, port=_port;
jens@0: 
jens@0: - (BOOL) isEqual: (IPAddress*)addr
jens@0: {
jens@0:     return [addr isKindOfClass: [IPAddress class]] && [self isSameHost: addr] && addr->_port==_port;
jens@0: }
jens@0: 
jens@0: - (BOOL) isSameHost: (IPAddress*)addr
jens@0: {
jens@0:     return addr && _ipv4==addr->_ipv4;
jens@0: }
jens@0: 
jens@0: - (NSUInteger) hash
jens@0: {
jens@0:     return _ipv4 ^ _port;
jens@0: }
jens@0: 
jens@0: - (NSString*) ipv4name
jens@0: {
jens@0:     UInt32 ipv4 = self.ipv4;
jens@0:     if( ipv4 != 0 ) {
jens@0:         const UInt8* b = (const UInt8*)&ipv4;
jens@0:         return [NSString stringWithFormat: @"%u.%u.%u.%u",
jens@0:                 (unsigned)b[0],(unsigned)b[1],(unsigned)b[2],(unsigned)b[3]];
jens@0:     } else
jens@0:         return nil;
jens@0: }
jens@0: 
jens@0: - (NSString*) hostname
jens@0: {
jens@0:     return [self ipv4name];
jens@0: }
jens@0: 
jens@0: - (NSString*) description
jens@0: {
jens@0:     NSString *name = self.hostname ?: @"0.0.0.0";
jens@0:     if( _port )
jens@0:         name = [name stringByAppendingFormat: @":%hu",_port];
jens@0:     return name;
jens@0: }
jens@0: 
jens@0: 
jens@0: + (IPAddress*) localAddress
jens@0: {
jens@0:     // getifaddrs returns a linked list of interface entries;
jens@0:     // find the first active non-loopback interface with IPv4:
jens@0:     UInt32 address = 0;
jens@0:     struct ifaddrs *interfaces;
jens@0:     if( getifaddrs(&interfaces) == 0 ) {
jens@0:         struct ifaddrs *interface;
jens@0:         for( interface=interfaces; interface; interface=interface->ifa_next ) {
jens@0:             if( (interface->ifa_flags & IFF_UP) && ! (interface->ifa_flags & IFF_LOOPBACK) ) {
jens@0:                 const struct sockaddr_in *addr = (const struct sockaddr_in*) interface->ifa_addr;
jens@0:                 if( addr && addr->sin_family==AF_INET ) {
jens@0:                     address = addr->sin_addr.s_addr;
jens@0:                     break;
jens@0:                 }
jens@0:             }
jens@0:         }
jens@0:         freeifaddrs(interfaces);
jens@0:     }
jens@0:     return [[[self alloc] initWithIPv4: address] autorelease];
jens@0: }
jens@0: 
jens@0: 
jens@0: // Private IP address ranges. See RFC 3330.
jens@0: static const struct {UInt32 mask, value;} const kPrivateRanges[] = {
jens@0:     {0xFF000000, 0x00000000},       //   0.x.x.x (hosts on "this" network)
jens@0:     {0xFF000000, 0x0A000000},       //  10.x.x.x (private address range)
jens@0:     {0xFF000000, 0x7F000000},       // 127.x.x.x (loopback)
jens@0:     {0xFFFF0000, 0xA9FE0000},       // 169.254.x.x (link-local self-configured addresses)
jens@0:     {0xFFF00000, 0xAC100000},       // 172.(16-31).x.x (private address range)
jens@0:     {0xFFFF0000, 0xC0A80000},       // 192.168.x.x (private address range)
jens@0:     {0,0}
jens@0: };
jens@0: 
jens@0: 
jens@0: - (BOOL) isPrivate
jens@0: {
jens@0:     UInt32 address = ntohl(self.ipv4);
jens@0:     int i;
jens@0:     for( i=0; kPrivateRanges[i].mask; i++ )
jens@0:         if( (address & kPrivateRanges[i].mask) == kPrivateRanges[i].value )
jens@0:             return YES;
jens@0:     return NO;
jens@0: }
jens@0: 
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: 
jens@0: 
jens@0: @implementation HostAddress
jens@0: 
jens@0: 
jens@0: - (id) initWithHostname: (NSString*)hostname port: (UInt16)port
jens@0: {
jens@0:     self = [super initWithIPv4: 0 port: port];
jens@0:     if( self ) {
jens@0:         if( [hostname length]==0 ) {
jens@0:             [self release];
jens@0:             return nil;
jens@0:         }
jens@0:         _hostname = [hostname copy];
jens@0:     }
jens@0:     return self;
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void)encodeWithCoder:(NSCoder *)coder
jens@0: {
jens@0:     [super encodeWithCoder: coder];
jens@0:     [coder encodeObject: _hostname forKey: @"host"];
jens@0: }
jens@0: 
jens@0: - (id)initWithCoder:(NSCoder *)decoder
jens@0: {
jens@0:     self = [super initWithCoder: decoder];
jens@0:     if( self ) {
jens@0:         _hostname = [[decoder decodeObjectForKey: @"host"] copy];
jens@0:     }
jens@0:     return self;
jens@0: }
jens@0: 
jens@0: - (NSUInteger) hash
jens@0: {
jens@0:     return [_hostname hash] ^ _port;
jens@0: }
jens@0: 
jens@0: 
jens@0: - (NSString*) hostname  {return _hostname;}
jens@0: 
jens@0: 
jens@0: - (UInt32) ipv4
jens@0: {
jens@0:     struct hostent *ent = gethostbyname(_hostname.UTF8String);
jens@0:     if( ! ent ) {
jens@0:         Log(@"HostAddress: DNS lookup failed for <%@>: %s", _hostname, hstrerror(h_errno));
jens@0:         return 0;
jens@0:     }
jens@0:     return * (const in_addr_t*) ent->h_addr_list[0];
jens@0: }
jens@0: 
jens@0: 
jens@0: - (BOOL) isSameHost: (IPAddress*)addr
jens@0: {
jens@0:     return [addr isKindOfClass: [HostAddress class]] && [_hostname caseInsensitiveCompare: addr.hostname]==0;
jens@0: }
jens@0: 
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: 
jens@0: @implementation RecentAddress
jens@0: 
jens@0: 
jens@0: - (id) initWithIPAddress: (IPAddress*)addr
jens@0: {
jens@0:     return [super initWithIPv4: addr.ipv4 port: addr.port];
jens@0: }
jens@0: 
jens@0: 
jens@0: @synthesize lastSuccess=_lastSuccess, successes=_successes;
jens@0: 
jens@0: - (BOOL) noteSuccess
jens@0: {
jens@0:     if( _successes < 0xFFFF )
jens@0:         _successes++;
jens@0:     _lastSuccess = CFAbsoluteTimeGetCurrent();
jens@0:     return YES;
jens@0: }
jens@0: 
jens@0: - (BOOL) noteSeen
jens@0: {
jens@0:     CFAbsoluteTime now = CFAbsoluteTimeGetCurrent();
jens@0:     BOOL significant = ( now-_lastSuccess >= 18*60*60 );
jens@0:     _lastSuccess = now;
jens@0:     return significant;
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void)encodeWithCoder:(NSCoder *)coder
jens@0: {
jens@0:     [super encodeWithCoder: coder];
jens@0:     [coder encodeDouble: _lastSuccess forKey: @"last"];
jens@0:     [coder encodeInt: _successes forKey: @"succ"];
jens@0: }
jens@0: 
jens@0: - (id)initWithCoder:(NSCoder *)decoder
jens@0: {
jens@0:     self = [super initWithCoder: decoder];
jens@0:     if( self ) {
jens@0:         _lastSuccess = [decoder decodeDoubleForKey: @"last"];
jens@0:         _successes = [decoder decodeIntForKey: @"succ"];
jens@0:     }
jens@0:     return self;
jens@0: }
jens@0: 
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: 
jens@0: 
jens@0: #import "Test.h"
jens@0: 
jens@0: TestCase(IPAddress) {
jens@0:     RequireTestCase(CollectionUtils);
jens@0:     IPAddress *addr = [[IPAddress alloc] initWithIPv4: htonl(0x0A0001FE) port: 8080];
jens@0:     CAssertEq(addr.ipv4,htonl(0x0A0001FE));
jens@0:     CAssertEq(addr.port,8080);
jens@0:     CAssertEqual(addr.hostname,@"10.0.1.254");
jens@0:     CAssertEqual(addr.description,@"10.0.1.254:8080");
jens@0:     CAssert(addr.isPrivate);
jens@0:     
jens@0:     addr = [[IPAddress alloc] initWithHostname: @"66.66.0.255" port: 123];
jens@0:     CAssertEq(addr.class,[IPAddress class]);
jens@0:     CAssertEq(addr.ipv4,htonl(0x424200FF));
jens@0:     CAssertEq(addr.port,123);
jens@0:     CAssertEqual(addr.hostname,@"66.66.0.255");
jens@0:     CAssertEqual(addr.description,@"66.66.0.255:123");
jens@0:     CAssert(!addr.isPrivate);
jens@0:     
jens@0:     addr = [[IPAddress alloc] initWithHostname: @"www.apple.com" port: 80];
jens@0:     CAssertEq(addr.class,[HostAddress class]);
jens@0:     Log(@"www.apple.com = 0x%08X", addr.ipv4);
jens@0:     CAssertEq(addr.ipv4,htonl(0x1195A00A));
jens@0:     CAssertEq(addr.port,80);
jens@0:     CAssertEqual(addr.hostname,@"www.apple.com");
jens@0:     CAssertEqual(addr.description,@"www.apple.com:80");
jens@0:     CAssert(!addr.isPrivate);
jens@0: }
jens@0: 
jens@0: 
jens@0: /*
jens@0:  Copyright (c) 2008, Jens Alfke <jens@mooseyard.com>. All rights reserved.
jens@0:  
jens@0:  Redistribution and use in source and binary forms, with or without modification, are permitted
jens@0:  provided that the following conditions are met:
jens@0:  
jens@0:  * Redistributions of source code must retain the above copyright notice, this list of conditions
jens@0:  and the following disclaimer.
jens@0:  * Redistributions in binary form must reproduce the above copyright notice, this list of conditions
jens@0:  and the following disclaimer in the documentation and/or other materials provided with the
jens@0:  distribution.
jens@0:  
jens@0:  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
jens@0:  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
jens@0:  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
jens@0:  BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
jens@0:  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
jens@0:   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
jens@0:  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
jens@0:  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
jens@0:  */