initial osx portosx/0.0

Signed-off-by: Michael Krelin <hacker@klever.net>

1 files changed, 168 insertions, 0 deletions

diff --git a/pumpkin/ReceiveXFer.m b/pumpkin/ReceiveXFer.m
new file mode 100644
index 0000000..33e9604
--- a/dev/null
+++ b/pumpkin/ReceiveXFer.m
@@ -0,0 +1,168 @@
+#import "ReceiveXFer.h"
+#import "StringsAttached.h"
+#import "ConfirmRequest.h"
+
+@implementation ReceiveXFer
+
+- (ReceiveXFer*)initWithLocalFile:(NSString *)lf peerAddress:(const struct sockaddr_in *)pa remoteFile:(NSString *)rf xferType :(NSString *)xt blockSize:(uint16_t)bs andTimeout:(int)to{
+    if(!(self = [super init])) return self;
+    xferPrefix = @"⬇";
+    retryTimeout = to;
+    localFile = lf;
+    memmove(&peer,pa,sizeof(peer));
+    [[NSFileManager defaultManager] createFileAtPath:localFile contents:nil attributes:nil];
+    if(!(theFile = [[NSFileHandle fileHandleForWritingAtPath:localFile] retain])) {
+	[pumpkin log:@"Failed to create '%@', transfer aborted.", localFile];
+	return self;
+    }
+    [self createSocket];
+    NSMutableDictionary *o = [NSMutableDictionary dictionaryWithCapacity:4];
+    [o setValue:[NSString stringWithFormat:@"%u",bs] forKey:@"blksize"];
+    [o setValue:@"" forKey:@"tsize"];
+    [o setValue:[NSString stringWithFormat:@"%d",(int)retryTimeout] forKey:@"timeout"];
+    state = xferStateConnecting;
+    [self queuePacket:[TFTPPacket packetRRQWithFile:xferFilename=rf xferType:xferType=xt andOptions:o]];
+    [self appear];
+    return self;
+}
+
+- (ReceiveXFer*)initWithPeer:(struct sockaddr_in *)sin andPacket:(TFTPPacket *)p {
+    if(!(self = [super initWithPeer:sin andPacket:p])) return self;
+    xferPrefix = @"⬇";
+    xferFilename=[p.rqFilename retain]; xferType=[p.rqType retain];
+    [pumpkin log:@"'%@' of type '%@' is coming from %@", xferFilename, xferType, [NSString stringWithSocketAddress:&peer]];
+    
+    [self createSocket];
+    [self appear];
+    
+    if(![self makeLocalFileName:xferFilename])
+	return self;
+
+    switch([[pumpkin.theDefaults.values valueForKey:@"wrqBehavior"] intValue]) {
+	case onWRQDeny: [self goOnWithVerdict:verdictDeny]; break;
+	case onWRQTake: [self goOnWithVerdict:verdictAllow]; break;
+	case onWRQPromptIfExists:
+	    if(![[NSFileManager defaultManager] fileExistsAtPath:localFile]) {
+		[self goOnWithVerdict:verdictAllow];
+		break;
+	    }
+	case onWRQPrompt:
+	    [ConfirmRequest confirmationWithXfer:self];
+	    break;
+    }
+    return self;
+}
+-(void)goOnWithVerdict:(int)verdict {
+    if(!(verdict==verdictAllow || verdict==verdictRename)) {
+	[self queuePacket:[TFTPPacket packetErrorWithCode:tftpErrAccessViolation andMessage:@"Access denied"]];
+	return;
+    }
+    NSFileManager *fm = [NSFileManager defaultManager];
+    if(verdict==verdictRename) {
+	int i;
+	for(i=1;i>0;++i) {
+	    if(![self makeLocalFileName:[NSString stringWithFormat:@"%@ (%d)",xferFilename,i]])
+		return;
+	    if(![fm fileExistsAtPath:localFile]) break;
+	    [localFile release],localFile=nil;
+	}
+	if(!localFile) {
+	    [self queuePacket:[TFTPPacket packetErrorWithCode:tftpErrFileExists andMessage:@"Couldn't find a name for a file"]];
+	    return;
+	}
+    }
+    [pumpkin log:@"Receiving '%@'",localFile];
+    [fm createFileAtPath:localFile contents:nil attributes:nil];
+    if(!(theFile = [[NSFileHandle fileHandleForWritingAtPath:localFile] retain])) {
+	[self queuePacket:[TFTPPacket packetErrorWithErrno:errno andFallback:@"couldn't write to file"]];
+	return;
+    }
+    xferSize=0;
+    NSMutableDictionary *o = [NSMutableDictionary dictionaryWithCapacity:4];
+    [initialPacket.rqOptions enumerateKeysAndObjectsUsingBlock:^(NSString* k,NSString *v,BOOL *s) {
+	if([k isEqualToString:@"blksize"]) {
+	    [o setValue:[NSString stringWithFormat:@"%u",blockSize=v.intValue] forKey:@"blksize"];
+	}else if([k isEqualToString:@"tsize"]) {
+	    [o setValue:[NSString stringWithFormat:@"%lld",xferSize=v.longLongValue] forKey:@"tsize"];
+	}else if([k isEqualToString:@"timeout"]) {
+	    [o setValue:[NSString stringWithFormat:@"%d",v.intValue] forKey:@"timeout"];
+	    retryTimeout = v.intValue;
+	}else
+	    [pumpkin log:@"Unknown option '%@' with value '%@'. Ignoring.",k,v];
+    }];
+    if(xferSize) {
+	long xb = (xferSize/blockSize)+1;
+	if(xb>UINT16_MAX) {
+	    [self queuePacket:[TFTPPacket packetErrorWithCode:tftpErrUndefined andMessage:[NSString stringWithFormat:@"file seems to be too big (%lld bytes) and would take %ld blocks to be transferred with the block size of %d bytes", xferSize, xb,blockSize]] ];
+	    return;
+	}
+	xferBlocks = xb;
+    }
+    state = xferStateXfer;
+    if([o count]) {
+	[self queuePacket:[TFTPPacket packetOACKWithOptions:o]];
+    }else{
+	[self queuePacket:[TFTPPacket packetACKWithBlock:acked=0]];
+    }
+    [self updateView];
+}
+
+-(void)eatTFTPPacket:(TFTPPacket *)p from:(struct sockaddr_in *)sin {
+    if(state==xferStateConnecting) {
+	peer.sin_port = sin->sin_port;
+	[self updateView];
+    }else if(![self isPeer:sin]) {
+	[pumpkin log:@"Packet from unexpected source (%@) received",[NSString stringWithSocketAddress:sin]];
+	return;
+    }
+    switch(p.op) {
+	case tftpOpDATA:
+	{
+	    NSData *d=p.rqData;;
+	    @try {
+		if(p.block > (acked+1))
+		    [pumpkin log:@"While transferring %@ block %d seems to immediately follow block %d",xferFilename,p.block,acked];
+		[theFile seekToFileOffset:(p.block-1)*blockSize];
+		[theFile writeData:d];
+		[theFile truncateFileAtOffset:(p.block-1)*blockSize+d.length];
+	    }@catch (NSException *e) {
+		[self queuePacket:[TFTPPacket packetErrorWithCode:tftpErrUndefined andMessage:e.reason]];
+		break;
+	    }
+	    [self queuePacket:[TFTPPacket packetACKWithBlock: acked=p.block]];
+	    [self updateView];
+	    if(d.length<blockSize)
+		state = xferStateShutdown;
+	}
+	    break;
+	case tftpOpOACK:
+	{
+	    __block BOOL a=NO;
+	    [p.rqOptions enumerateKeysAndObjectsUsingBlock:^(NSString *k,NSString *v,BOOL *s) {
+		if([k isEqualToString:@"blksize"])
+		    blockSize = v.intValue;
+		else if([k isEqualToString:@"tsize"])
+		    xferSize = v.longLongValue;
+		else if([k isEqualToString:@"timeout"])
+		    retryTimeout = v.intValue;
+		else{
+		    [pumpkin log:@"Totally unknown option %@ acknowledged by remote.",k];
+		    a=YES;
+		}
+	    }];
+	    if(a) {
+		[self abort];
+		break;
+	    }
+	    [self queuePacket:[TFTPPacket packetACKWithBlock:0]];
+	    state = xferStateXfer;
+	    [self updateView];
+	}
+	    break;
+	default:
+	    [pumpkin log:@"Totaly unexpected opcode %d received",p.op];
+	    break;
+    }
+}
+
+@end