Method CreateOfferedFilePacket

src/KnownFile.cpp:1154–1297

void CKnownFile::CreateOfferedFilePacket(
	CMemFile *files,
	CServer *pServer,
	CUpDownClient *pClient) {

	// This function is used for offering files to the local server and for sending
	// shared files to some other client. In each case we send our IP+Port only, if
	// we have a HighID.

	wxCHECK_RET(!(pClient && pServer), "pClient and pServer cannot both be non-null");

	SetPublishedED2K(true);
	files->WriteHash(GetFileHash());

	uint32 nClientID = 0;
	uint16 nClientPort = 0;

	if (pServer) {
		if (pServer->GetTCPFlags() & SRV_TCPFLG_COMPRESSION) {
			#define FILE_COMPLETE_ID		0xfbfbfbfb
			#define FILE_COMPLETE_PORT	0xfbfb
			#define FILE_INCOMPLETE_ID	0xfcfcfcfc
			#define FILE_INCOMPLETE_PORT	0xfcfc
			// complete   file: ip 251.251.251 (0xfbfbfbfb) port 0xfbfb
			// incomplete file: op 252.252.252 (0xfcfcfcfc) port 0xfcfc
			if (GetStatus() == PS_COMPLETE) {
				nClientID = FILE_COMPLETE_ID;
				nClientPort = FILE_COMPLETE_PORT;
			} else {
				nClientID = FILE_INCOMPLETE_ID;
				nClientPort = FILE_INCOMPLETE_PORT;
			}
		} else {
			if (theApp->IsConnectedED2K() && !::IsLowID(theApp->GetED2KID())){
				nClientID = theApp->GetID();
				nClientPort = thePrefs::GetPort();
			}
		}
	} else {
		// Do not merge this with the above case - this one
		// also checks Kad status.
		if (theApp->IsConnected() && !theApp->IsFirewalled()) {
			nClientID = theApp->GetID();
			nClientPort = thePrefs::GetPort();
		}
	}

	files->WriteUInt32(nClientID);
	files->WriteUInt16(nClientPort);

	TagPtrList tags;

	// The printable filename is used because it's destined for another user.
	tags.push_back(new CTagString(FT_FILENAME, GetFileName().GetPrintable()));

	if (pClient && pClient->GetVBTTags()) {
		tags.push_back(new CTagVarInt(FT_FILESIZE, GetFileSize()));
	} else {