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path: root/pumpkin/SendXFer.m
authorMichael Krelin <hacker@klever.net>2012-12-08 21:19:17 (UTC)
committer Michael Krelin <hacker@klever.net>2012-12-11 21:59:29 (UTC)
commit8808689fe340bec6e90ab13dd502292b0579cf1f (patch) (side-by-side diff)
tree45b7c863151341f687b74e40bffcbd7ab5468783 /pumpkin/SendXFer.m
parent6e7e413ca364d79673e523c09767c18e7cff1bec (diff)
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initial osx portosx/0.0
Signed-off-by: Michael Krelin <hacker@klever.net>
Diffstat (limited to 'pumpkin/SendXFer.m') (more/less context) (ignore whitespace changes)
-rw-r--r--pumpkin/SendXFer.m156
1 files changed, 156 insertions, 0 deletions
diff --git a/pumpkin/SendXFer.m b/pumpkin/SendXFer.m
new file mode 100644
index 0000000..9a1d85b
--- a/dev/null
+++ b/pumpkin/SendXFer.m
@@ -0,0 +1,156 @@
+#import "SendXFer.h"
+#import "StringsAttached.h"
+#import "ConfirmRequest.h"
+
+@implementation SendXFer
+
+-(SendXFer*)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));
+ if(!(theFile = [[NSFileHandle fileHandleForReadingAtPath:localFile] retain])) {
+ [pumpkin log:@"Failed to open '%@', transfer aborted.",localFile];
+ return self;
+ }
+
+ long xb = ((xferSize=[theFile seekToEndOfFile])/blockSize)+1;
+ if(xb > UINT16_MAX) {
+ [pumpkin log:@"file is too big (%lld bytes) and will take %ld blocks to be sent with block size of %d bytes",xferSize,xb,blockSize];
+ return self;
+ }
+ xferBlocks = xb;
+
+ [self createSocket];
+ NSMutableDictionary *o = [NSMutableDictionary dictionaryWithCapacity:4];
+ [o setValue:[NSString stringWithFormat:@"%u",bs] forKey:@"blksize"];
+ [o setValue:[NSString stringWithFormat:@"%llu",xferSize] forKey:@"tsize"];
+ [o setValue:[NSString stringWithFormat:@"%d",(int)retryTimeout] forKey:@"timeout"];
+ state = xferStateConnecting;
+ [self queuePacket:[TFTPPacket packetWRQWithFile:xferFilename=rf xferType:xferType=xt andOptions:o]];
+ [self appear];
+ return self;
+}
+
+-(SendXFer*)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 requested from %@",
+ xferFilename, xferType, [NSString stringWithSocketAddress:&peer] ];
+
+ [self createSocket];
+ [self appear];
+
+ if(![self makeLocalFileName:xferFilename])
+ return self;
+
+ switch([[pumpkin.theDefaults.values valueForKey:@"rrqBehavior"] intValue]) {
+ case onRRQDeny: [self goOnWithVerdict:verdictDeny]; break;
+ case onRRQGive: [self goOnWithVerdict:verdictAllow]; break;
+ default:
+ [ConfirmRequest confirmationWithXfer:self];
+ break;
+ }
+ return self;
+}
+-(void)goOnWithVerdict:(int)verdict {
+ if(verdict!=verdictAllow) {
+ [self queuePacket:[TFTPPacket packetErrorWithCode:tftpErrAccessViolation andMessage:@"Access denied"]];
+ return;
+ }
+ if(!(theFile = [[NSFileHandle fileHandleForReadingAtPath:localFile] retain])) {
+ [self queuePacket:[TFTPPacket packetErrorWithErrno:errno andFallback:@"couldn't open file"]];
+ return;
+ }
+ xferSize = [theFile seekToEndOfFile];
+ NSMutableDictionary *o = [NSMutableDictionary dictionaryWithCapacity:4];
+ [[initialPacket rqOptions] enumerateKeysAndObjectsUsingBlock:^(NSString* k, NSString* v, BOOL *stop) {
+ 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] 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];
+ }];
+ long xb = (xferSize/blockSize)+1;
+ if(xb > UINT16_MAX) {
+ [self queuePacket:[TFTPPacket packetErrorWithCode:tftpErrUndefined andMessage:[NSString stringWithFormat:@"file is too big (%lld bytes) and will take %ld blocks to be sent with block size of %d bytes",xferSize,xb,blockSize]]];
+ return;
+ }
+ xferBlocks = xb;
+ state = xferStateXfer;
+ if(o.count) {
+ [self queuePacket:[TFTPPacket packetOACKWithOptions:o]];
+ }else{
+ [self xfer];
+ }
+}
+
+- (void) xfer {
+ NSAssert(theFile,@"no file!");
+ [theFile seekToFileOffset:acked*blockSize];
+ [self queuePacket:[TFTPPacket packetDataWithBlock:acked+1 andData:[theFile readDataOfLength:blockSize]]];
+}
+
+- (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 (%@) recevied",[NSString stringWithSocketAddress:sin]];
+ return;
+ }
+ switch(p.op) {
+ case tftpOpACK:
+ if(state==xferStateShutdown || ( (acked=p.block)==xferBlocks && (state=xferStateShutdown) ) ) {
+ CFSocketEnableCallBacks(sockie, kCFSocketWriteCallBack);
+ return;
+ }
+ [self updateView];
+ [self xfer];
+ break;
+ case tftpOpERROR:
+ [pumpkin log:@"Error %u:%@",p.rqCode, p.rqMessage];
+ [self updateView];
+ [self disappear];
+ return;
+ case tftpOpOACK:
+ if(acked) {
+ [pumpkin log:@"It's a bit too late to acknowledge options, ignoring OACK packet"];
+ break;
+ }
+ {
+ __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"]) {
+ }else if([k isEqualToString:@"timeout"])
+ retryTimeout = v.intValue;
+ else{
+ [pumpkin log:@"Totally unknown option '%@' with value '%@' acknowledged by peer",k,v];
+ a=YES;
+ }
+ }];
+ if(a) {
+ [self abort];
+ break;
+ }
+ state = xferStateXfer;
+ [self updateView];
+ [self xfer];
+ }
+ break;
+ default:
+ [pumpkin log:@"Totaly unexpected opcode %d received",p.op];
+ break;
+ }
+}
+
+
+@end