5 * Created by Victor Grishchenko on 3/6/09.
6 * Copyright 2009 Delft University of Technology. All rights reserved.
13 #include <sys/select.h>
16 #include <arpa/inet.h>
22 //#include <glog/logging.h>
27 using namespace swift;
29 swift::tint Channel::last_tick = 0;
30 int Channel::MAX_REORDERING = 4;
31 bool Channel::SELF_CONN_OK = false;
32 swift::tint Channel::TIMEOUT = TINT_SEC*60;
33 std::vector<Channel*> Channel::channels(1);
34 Address Channel::tracker;
35 tbheap Channel::send_queue;
36 FILE* Channel::debug_file = NULL;
37 #include "ext/simple_selector.cpp"
38 PeerSelector* Channel::peer_selector = new SimpleSelector();
40 Channel::Channel (FileTransfer* transfer, int socket, Address peer_addr) :
41 transfer_(transfer), peer_(peer_addr), peer_channel_id_(0), pex_out_(0),
42 socket_(socket==INVALID_SOCKET?Datagram::default_socket():socket), // FIXME
43 data_out_cap_(bin64_t::ALL), last_data_out_time_(0), last_data_in_time_(0),
44 own_id_mentioned_(false), next_send_time_(0), last_send_time_(0),
45 last_recv_time_(0), rtt_avg_(TINT_SEC), dev_avg_(0), dip_avg_(TINT_SEC),
46 data_in_dbl_(bin64_t::NONE), hint_out_size_(0),
47 cwnd_(1), send_interval_(TINT_SEC), send_control_(PING_PONG_CONTROL),
48 sent_since_recv_(0), ack_rcvd_recent_(0), ack_not_rcvd_recent_(0),
49 last_loss_time_(0), owd_min_bin_(0), owd_min_bin_start_(NOW),
50 owd_cur_bin_(0), dgrams_sent_(0), dgrams_rcvd_(0),
51 data_in_(TINT_NEVER,bin64_t::NONE)
55 this->id_ = channels.size();
56 channels.push_back(this);
57 transfer_->hs_in_.push_back(id_);
58 for(int i=0; i<4; i++) {
59 owd_min_bins_[i] = TINT_NEVER;
60 owd_current_[i] = TINT_NEVER;
63 dprintf("%s #%u init %s\n",tintstr(),id_,peer_.str());
67 Channel::~Channel () {
72 void swift::SetTracker(const Address& tracker) {
73 Channel::tracker = tracker;
77 int Channel::DecodeID(int scrambled) {
78 return scrambled ^ (int)Datagram::start;
80 int Channel::EncodeID(int unscrambled) {
81 return unscrambled ^ (int)Datagram::start;
85 int swift::Listen (Address addr) {
87 cb.may_read = &Channel::RecvDatagram;
88 cb.sock = Datagram::Bind(addr,cb);
93 void swift::Shutdown (int sock_des) {
98 void swift::Loop (tint till) {
104 int swift::Open (const char* filename, const Sha1Hash& hash) {
105 FileTransfer* ft = new FileTransfer(filename, hash);
106 if (ft && ft->file().file_descriptor()) {
108 /*if (FileTransfer::files.size()<fdes) // FIXME duplication
109 FileTransfer::files.resize(fdes);
110 FileTransfer::files[fdes] = ft;*/
112 // initiate tracker connections
113 if (Channel::tracker!=Address())
116 return ft->file().file_descriptor();
125 void swift::Close (int fd) {
126 if (fd<FileTransfer::files.size() && FileTransfer::files[fd])
127 delete FileTransfer::files[fd];
131 void swift::AddPeer (Address address, const Sha1Hash& root) {
132 Channel::peer_selector->AddPeer(address,root);
136 uint64_t swift::Size (int fdes) {
137 if (FileTransfer::files.size()>fdes && FileTransfer::files[fdes])
138 return FileTransfer::files[fdes]->file().size();
144 bool swift::IsComplete (int fdes) {
145 if (FileTransfer::files.size()>fdes && FileTransfer::files[fdes])
146 return FileTransfer::files[fdes]->file().is_complete();
152 uint64_t swift::Complete (int fdes) {
153 if (FileTransfer::files.size()>fdes && FileTransfer::files[fdes])
154 return FileTransfer::files[fdes]->file().complete();
160 uint64_t swift::SeqComplete (int fdes) {
161 if (FileTransfer::files.size()>fdes && FileTransfer::files[fdes])
162 return FileTransfer::files[fdes]->file().seq_complete();
168 const Sha1Hash& swift::RootMerkleHash (int file) {
169 FileTransfer* trans = FileTransfer::file(file);
171 return Sha1Hash::ZERO;
172 return trans->file().root_hash();
176 /** <h2> swift handshake </h2>
179 <li> to send a datagram, a channel must be created
180 (channels are cheap and easily recycled)
181 <li> a datagram must contain either the receiving
182 channel id (scrambled) or the root hash