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cmdgw.cpp
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/*
* cmdgw.cpp
* command gateway for controling swift engine via a TCP connection
*
* Created by Arno Bakker
* Copyright 2010-2012 TECHNISCHE UNIVERSITEIT DELFT. All rights reserved.
*
*/
#include "swift.h"
#include <event2/buffer.h>
#include <event2/bufferevent.h>
#include <event2/listener.h>
#include <event2/http.h>
#include <iostream>
#include <sstream>
using namespace swift;
// Send PLAY after receiving N bytes
#define CMDGW_MAX_PREBUF_BYTES (256*1024)
// Report swift download progress every 2^layer * chunksize bytes (so 0 = report every chunk)
#define CMDGW_FIRST_PROGRESS_BYTE_INTERVAL_AS_LAYER 0 // must be 0
#define CMDGW_PREBUF_PROGRESS_BYTE_INTERVAL_AS_LAYER 0
// Status of the swarm download
#define DLSTATUS_ALLOCATING_DISKSPACE 0
#define DLSTATUS_HASHCHECKING 2
#define DLSTATUS_DOWNLOADING 3
#define DLSTATUS_SEEDING 4
#define DLSTATUS_STOPPED_ON_ERROR 6
#define MAX_CMD_MESSAGE 1024
#define ERROR_NO_ERROR 0
#define ERROR_UNKNOWN_CMD -1
#define ERROR_MISS_ARG -2
#define ERROR_BAD_ARG -3
#define ERROR_BAD_SWARM -4
#define CMDGW_MAX_CLIENT 1024 // Arno: == maximum number of swarms per proc
struct cmd_gw_t {
int id;
evutil_socket_t cmdsock;
int td; // swift FD
bool moreinfo; // whether to report detailed stats (see SETMOREINFO cmd)
tint startt; // ARNOSMPTODO: debug speed measurements, remove
std::string mfspecname; // MULTIFILE
uint64_t startoff; // MULTIFILE: starting offset in content range of desired file
uint64_t endoff; // MULTIFILE: ending offset (careful, for an e.g. 100 byte interval this is 99)
bool playsent;
std::string xcontentdur;
std::string contentlenstr;
std::string mimetype;
} cmd_requests[CMDGW_MAX_CLIENT];
int cmd_gw_reqs_open = 0;
int cmd_gw_reqs_count = 0;
int cmd_gw_conns_open = 0;
struct evconnlistener *cmd_evlistener = NULL;
struct evbuffer *cmd_evbuffer = NULL; // Data received on cmd socket : WARNING: one for all cmd sockets
/*
* SOCKTUNNEL
* We added the ability for a process to tunnel data over swift's UDP socket.
* The process should send TUNNELSEND commands over the CMD TCP socket and will
* receive TUNNELRECV commands from swift, containing data received via UDP
* on channel 0xffffffff.
*/
typedef enum {
CMDGW_TUNNEL_SCAN4CRLF,
CMDGW_TUNNEL_READTUNNEL
} cmdgw_tunnel_t;
cmdgw_tunnel_t cmd_tunnel_state=CMDGW_TUNNEL_SCAN4CRLF;
uint32_t cmd_tunnel_expect=0;
Address cmd_tunnel_dest_addr;
uint32_t cmd_tunnel_dest_chanid;
evutil_socket_t cmd_tunnel_sock=INVALID_SOCKET;
// HTTP gateway address for PLAY cmd
Address cmd_gw_httpaddr;
uint64_t cmd_gw_livesource_disc_wnd=POPT_LIVE_DISC_WND_ALL;
popt_cont_int_prot_t cmd_gw_cipm=POPT_CONT_INT_PROT_MERKLE;
#define cmd_gw_debug true
tint cmd_gw_last_open=0;
// Fwd defs
void CmdGwDataCameInCallback(struct bufferevent *bev, void *ctx);
bool CmdGwReadLine(evutil_socket_t cmdsock);
void CmdGwNewRequestCallback(evutil_socket_t cmdsock, char *line);
void CmdGwProcessData(evutil_socket_t cmdsock);
void CmdGwFreeRequest(cmd_gw_t* req)
{
req->id = -1;
req->cmdsock = -1;
req->td = -1;
req->moreinfo = false;
req->startt = 0;
req->mfspecname = "";
req->startoff = -1;
req->endoff = -1;
req->playsent = false;
req->xcontentdur = "";
req->mimetype = "";
}
void CmdGwCloseConnection(evutil_socket_t sock)
{
// Close cmd connection and stop all associated downloads.
// Doesn't remove .mhash state or content
if (cmd_gw_debug)
fprintf(stderr,"CmdGwCloseConnection: ENTER %d\n", sock );
bool scanning = true;
while (scanning)
{
scanning = false;
for(int i=0; i<cmd_gw_reqs_open; i++)
{
cmd_gw_t* req = &cmd_requests[i];
if (req->cmdsock==sock)
{
dprintf("%s @%i stopping-on-close transfer %i\n",tintstr(),req->id,req->td);
swift::Close(req->td);
// Remove from list and reiterate over it
CmdGwFreeRequest(req);
*req = cmd_requests[--cmd_gw_reqs_open];
scanning = true;
break;
}
}
}
if (cmd_evbuffer != NULL)
evbuffer_free(cmd_evbuffer);
// Arno, 2012-07-06: Close
swift::close_socket(sock);
cmd_gw_conns_open--;
// Arno, 2012-10-11: New policy Immediate shutdown on connection close,
// see CmdGwUpdateDLStatesCallback()
fprintf(stderr,"cmd: Shutting down on CMD connection close\n");
event_base_loopexit(Channel::evbase, NULL);
}
cmd_gw_t* CmdGwFindRequestByFD(int td)
{
for(int i=0; i<cmd_gw_reqs_open; i++)
if (cmd_requests[i].td==td)
return cmd_requests+i;
return NULL;
}
cmd_gw_t* CmdGwFindRequestBySwarmID(SwarmID &swarmid)
{
int td = swift::Find(swarmid);
if (td < 0)
return NULL;
else
return CmdGwFindRequestByFD(td);
}
void CmdGwGotCHECKPOINT(SwarmID &swarmid)
{
// Checkpoint the specified download
if (cmd_gw_debug)
fprintf(stderr,"cmd: GotCHECKPOINT: %s\n",swarmid.hex().c_str());
cmd_gw_t* req = CmdGwFindRequestBySwarmID(swarmid);
if (req == NULL)
return;
swift::Checkpoint(req->td);
}
void CmdGwGotREMOVE(SwarmID &swarmid, bool removestate, bool removecontent)
{
// Remove the specified download
if (cmd_gw_debug)
fprintf(stderr,"cmd: GotREMOVE: %s %d %d\n",swarmid.hex().c_str(),removestate,removecontent);
cmd_gw_t* req = CmdGwFindRequestBySwarmID(swarmid);
if (req == NULL)
{
if (cmd_gw_debug)
fprintf(stderr,"cmd: GotREMOVE: %s not found, bad swarm?\n",swarmid.hex().c_str());
return;
}
dprintf("%s @%i remove transfer %i\n",tintstr(),req->id,req->td);
// Arno: schaap moved cleanup to SwarmManager
swift::Close(req->td, removestate, removecontent);
CmdGwFreeRequest(req);
*req = cmd_requests[--cmd_gw_reqs_open];
}
void CmdGwGotMAXSPEED(SwarmID &swarmid, data_direction_t ddir, double speed)
{
// Set maximum speed on the specified download
//fprintf(stderr,"cmd: GotMAXSPEED: %s %d %lf\n",swarmid.hex().c_str(),ddir,speed);
cmd_gw_t* req = CmdGwFindRequestBySwarmID(swarmid);
if (req == NULL)
return;
swift::SetMaxSpeed(req->td, ddir, speed);
}
void CmdGwGotSETMOREINFO(SwarmID &swarmid, bool enable)
{
cmd_gw_t* req = CmdGwFindRequestBySwarmID(swarmid);
if (req == NULL)
return;
req->moreinfo = enable;
}
void CmdGwGotPEERADDR(SwarmID &swarmid, Address &peer)
{
cmd_gw_t* req = CmdGwFindRequestBySwarmID(swarmid);
if (req == NULL)
return;
swift::AddPeer(peer, swarmid);
}
void CmdGwSendINFOHashChecking(evutil_socket_t cmdsock, SwarmID &swarmid)
{
// Send INFO DLSTATUS_HASHCHECKING message.
char cmd[MAX_CMD_MESSAGE];
sprintf(cmd,"INFO %s %d %" PRIi64 "/%" PRIi64 " %lf %lf %" PRIu32 " %" PRIu32 "\r\n",swarmid.hex().c_str(),DLSTATUS_HASHCHECKING,(uint64_t)0,(uint64_t)0,0.0,0.0,0,0);
//fprintf(stderr,"cmd: SendINFO: %s", cmd);
send(cmdsock,cmd,strlen(cmd),0);
}
void CmdGwSendINFO(cmd_gw_t* req, int dlstatus)
{
// Send INFO message.
//if (cmd_gw_debug)
// fprintf(stderr,"cmd: SendINFO: F%d initdlstatus %d\n", req->td, dlstatus );
SwarmID swarmid = swift::GetSwarmID(req->td);
if (swarmid == SwarmID::NOSWARMID)
return; // Arno: swarm deleted, ignore
uint64_t size = swift::Size(req->td);
uint64_t complete = 0;
if (swift::ttype(req->td) == LIVE_TRANSFER)
complete = swift::SeqComplete(req->td,swift::GetHookinOffset(req->td));
else
complete = swift::Complete(req->td);
if (size > 0 && size == complete)
dlstatus = DLSTATUS_SEEDING;
if (!swift::IsOperational(req->td))
dlstatus = DLSTATUS_STOPPED_ON_ERROR;
// schaap FIXME: Are those active leechers and seeders, or potential
// leechers and seeders? In the latter case, get cached values when cached
// peers have been implemented.
uint32_t numleech = swift::GetNumLeechers(req->td);
uint32_t numseeds = swift::GetNumSeeders(req->td);
double dlspeed = swift::GetCurrentSpeed(req->td,DDIR_DOWNLOAD);
double ulspeed = swift::GetCurrentSpeed(req->td,DDIR_UPLOAD);
char cmd[MAX_CMD_MESSAGE];
sprintf(cmd,"INFO %s %d %" PRIu64 "/%" PRIu64 " %lf %lf %" PRIu32 " %" PRIu32 "\r\n",swarmid.hex().c_str(),dlstatus,complete,size,dlspeed,ulspeed,numleech,numseeds);
send(req->cmdsock,cmd,strlen(cmd),0);
// MORESTATS
if (req->moreinfo) {
// Send detailed ul/dl stats in JSON format.
std::ostringstream oss;
oss.setf(std::ios::fixed,std::ios::floatfield);
oss.precision(5);
channels_t::iterator iter;
channels_t *peerchans = NULL;
ContentTransfer *ct = swift::GetActivatedTransfer(req->td);
if (ct)
peerchans = ct->GetChannels();
oss << "MOREINFO" << " " << swarmid.hex() << " ";
double tss = (double)Channel::Time() / 1000000.0L;
oss << "{\"timestamp\":\"" << tss << "\", ";
oss << "\"channels\":";
oss << "[";
if (peerchans != NULL)
{
for (iter=peerchans->begin(); iter!=peerchans->end(); iter++) {
Channel *c = *iter;
if (c == NULL)
continue;
if (iter!=peerchans->begin())
oss << ", ";
oss << "{";
oss << "\"ip\": \"" << c->peer().ipstr() << "\", ";
oss << "\"port\": " << c->peer().port() << ", ";
oss << "\"raw_bytes_up\": " << c->raw_bytes_up() << ", ";
oss << "\"raw_bytes_down\": " << c->raw_bytes_down() << ", ";
oss << "\"bytes_up\": " << c->bytes_up() << ", ";
oss << "\"bytes_down\": " << c->bytes_down() << " ";
oss << "}";
}
}
oss << "], ";
oss << "\"raw_bytes_up\": " << Channel::global_raw_bytes_up << ", ";
oss << "\"raw_bytes_down\": " << Channel::global_raw_bytes_down << ", ";
oss << "\"bytes_up\": " << Channel::global_bytes_up << ", ";
oss << "\"bytes_down\": " << Channel::global_bytes_down << " ";
oss << "}";
oss << "\r\n";
std::stringbuf *pbuf=oss.rdbuf();
size_t slen = strlen(pbuf->str().c_str());
send(req->cmdsock,pbuf->str().c_str(),slen,0);
}
}
void CmdGwSendPLAY(cmd_gw_t *req)
{
// Send PLAY message to user
if (cmd_gw_debug)
fprintf(stderr,"cmd: SendPLAY: %d\n", req->td);
SwarmID swarmid = swift::GetSwarmID(req->td);
std::ostringstream oss;
oss << "PLAY ";
oss << swarmid.hex() << " ";
oss << "http://";
oss << cmd_gw_httpaddr.str();
oss << "/";
oss << swarmid.hex();
// Arno, 2013-09-25: Only append params that need to be echoed back
// by the HTTPGW, because the Transfer already exists.
bool added=false;
if (req->xcontentdur != "")
{
if (!added)
oss << "?";
oss << "cd=" << req->xcontentdur;
added = true;
}
if (req->mimetype != "")
{
if (!added)
oss << "?";
else
oss << "&";
oss << "mt=" << req->mimetype;
added = true;
}
// Arno FIXME: Should be replaced with swift::SetSize() method that stores value from URL.
if (req->contentlenstr != "")
{
if (!added)
oss << "?";
else
oss << "&";
oss << "cl=" << req->contentlenstr;
added = true;
}
oss << "\r\n";
std::stringbuf *pbuf=oss.rdbuf();
if (cmd_gw_debug)
fprintf(stderr,"cmd: SendPlay: %s", pbuf->str().c_str());
size_t slen = strlen(pbuf->str().c_str());
send(req->cmdsock,pbuf->str().c_str(),slen,0);
}
void CmdGwSendERRORBySocket(evutil_socket_t cmdsock, std::string msg, const SwarmID& swarmid=SwarmID::NOSWARMID)
{
std::string cmd = "ERROR ";
cmd += swarmid.hex();
cmd += " ";
cmd += msg;
cmd += "\r\n";
if (cmd_gw_debug)
fprintf(stderr,"cmd: SendERROR: %s\n", cmd.c_str() );
char *wire = strdup(cmd.c_str());
send(cmdsock,wire,strlen(wire),0);
free(wire);
}
/*
* For VOD and Live, wait until PREBUF_BYTES are in before sending PLAY.
*/
void CmdGwSwiftPrebufferProgressCallback (int td, bin_t bin)
{
//
// Subsequent bytes of content downloaded
//
//if (cmd_gw_debug)
// fprintf(stderr,"cmd: SwiftPrebuffProgress: %d\n", td );
cmd_gw_t* req = CmdGwFindRequestByFD(td);
if (req == NULL)
return;
uint64_t wantsize = std::min(req->endoff+1-req->startoff,(uint64_t)CMDGW_MAX_PREBUF_BYTES);
//if (cmd_gw_debug)
// fprintf(stderr,"cmd: SwiftPrebuffProgress: want %" PRIu64 " got %" PRIu64 "\n", swift::SeqComplete(req->td,req->startoff), wantsize );
if (swift::SeqComplete(req->td,req->startoff) >= wantsize)
{
// First CMDGW_MAX_PREBUF_BYTES bytes received via swift,
// tell user to PLAY
// ARNOSMPTODO: bitrate-dependent prebuffering?
//if (cmd_gw_debug)
// fprintf(stderr,"cmd: SwiftPrebufferProgress: Prebuf done %d\n", td );
swift::RemoveProgressCallback(td,&CmdGwSwiftPrebufferProgressCallback);
CmdGwSendPLAY(req);
}
// wait for prebuffer
}
/*
* For single file static content, install a new callback that checks whether
* we have enough data prebuffered. For multifile, wait till the first chunks
* containing the multi-file spec have been loaded, then set download pointer
* to the desired file (via swift::Seek) and then wait till enough data is
* prebuffered (via CmdGwSwiftPrebufferingProcessCallback).
*/
void CmdGwSwiftVODFirstProgressCallback (int td, bin_t bin)
{
//
// First bytes of content downloaded (first in absolute sense)
//
if (cmd_gw_debug)
fprintf(stderr,"cmd: SwiftFirstProgress: %d\n", td );
cmd_gw_t* req = CmdGwFindRequestByFD(td);
if (req == NULL)
return;
if (swift::ttype(td) == LIVE_TRANSFER)
{
// Shouldn't happen for LIVE
swift::RemoveProgressCallback(td,&CmdGwSwiftVODFirstProgressCallback);
return;
}
// VOD from here
Storage *storage = swift::GetStorage(td);
if (storage == NULL)
return;
if (!storage->IsReady()) {
// Wait until (multi-file) storage is ready
return;
}
swift::RemoveProgressCallback(td,&CmdGwSwiftVODFirstProgressCallback);
if (req->mfspecname == "")
{
// Single file
req->startoff = 0;
req->endoff = swift::Size(req->td)-1;
CmdGwSwiftPrebufferProgressCallback(req->td,bin_t(0,0)); // in case file on disk
if (!req->playsent)
swift::AddProgressCallback(td,&CmdGwSwiftPrebufferProgressCallback,CMDGW_PREBUF_PROGRESS_BYTE_INTERVAL_AS_LAYER);
}
else
{
// MULTIFILE
// Have spec, seek to wanted file
storage_files_t sfs = storage->GetStorageFiles();
storage_files_t::iterator iter;
bool found = false;
for (iter = sfs.begin(); iter < sfs.end(); iter++)
{
StorageFile *sf = *iter;
if (sf->GetSpecPathName() == req->mfspecname)
{
if (cmd_gw_debug)
fprintf(stderr,"cmd: SwiftFirstProgress: Seeking to multifile %s for %d\n", req->mfspecname.c_str(), td );
int ret = swift::Seek(req->td,sf->GetStart(),SEEK_SET);
if (ret < 0)
{
CmdGwSendERRORBySocket(req->cmdsock,"Error seeking to file in multi-file content.");
return;
}
found = true;
req->startoff = sf->GetStart();
req->endoff = sf->GetEnd();
CmdGwSwiftPrebufferProgressCallback(req->td,bin_t(0,0)); // in case file on disk
swift::AddProgressCallback(td,&CmdGwSwiftPrebufferProgressCallback,CMDGW_FIRST_PROGRESS_BYTE_INTERVAL_AS_LAYER);
break;
}
}
if (!found)
{
if (cmd_gw_debug)
fprintf(stderr,"cmd: SwiftFirstProgress: Error file not found %d\n", td );
CmdGwSendERRORBySocket(req->cmdsock,"Individual file not found in multi-file content.",GetSwarmID(req->td));
return;
}
}
}
void CmdGwSwiftErrorCallback (evutil_socket_t cmdsock)
{
// Error on swift socket callback
const char *response = "ERROR Swift Engine Problem\r\n";
send(cmdsock,response,strlen(response),0);
//swift::close_socket(sock);
}
void CmdGwSwiftAllocatingDiskspaceCallback (int td, bin_t bin)
{
//if (cmd_gw_debug)
// fprintf(stderr,"cmd: CmdGwSwiftAllocatingDiskspaceCallback: ENTER %d\n", td );
// Called before swift starts reserving diskspace.
cmd_gw_t* req = CmdGwFindRequestByFD(td);
if (req == NULL)
return;
CmdGwSendINFO(req,DLSTATUS_ALLOCATING_DISKSPACE);
}
void CmdGwUpdateDLStateCallback(cmd_gw_t* req)
{
// Periodic callback, tell user INFO
CmdGwSendINFO(req,DLSTATUS_DOWNLOADING);
}
int icount=0;
void CmdGwUpdateDLStatesCallback()
{
// Called by swift main approximately every second
// Loop over all swarms
for(int i=0; i<cmd_gw_reqs_open; i++)
{
cmd_gw_t* req = &cmd_requests[i];
CmdGwUpdateDLStateCallback(req);
}
}
void CmdGwDataCameInCallback(struct bufferevent *bev, void *ctx)
{
// Turn TCP stream into lines deliniated by \r\n
evutil_socket_t cmdsock = bufferevent_getfd(bev);
//if (cmd_gw_debug)
// fprintf(stderr,"CmdGwDataCameIn: ENTER %d\n", cmdsock );
struct evbuffer *inputevbuf = bufferevent_get_input(bev);
int inlen = evbuffer_get_length(inputevbuf);
int ret = evbuffer_add_buffer(cmd_evbuffer,inputevbuf);
if (ret == -1) {
CmdGwCloseConnection(cmdsock);
return;
}
int totlen = evbuffer_get_length(cmd_evbuffer);
//if (cmd_gw_debug)
// fprintf(stderr,"cmdgw: TCPDataCameIn: State %d, got %d new bytes, have %d want %d\n", (int)cmd_tunnel_state, inlen, totlen, cmd_tunnel_expect );
CmdGwProcessData(cmdsock);
}
void CmdGwProcessData(evutil_socket_t cmdsock)
{
// Process CMD data in the cmd_evbuffer
if (cmd_tunnel_state == CMDGW_TUNNEL_SCAN4CRLF)
{
bool ok=false;
do
{
ok = CmdGwReadLine(cmdsock);
if (ok && cmd_tunnel_state == CMDGW_TUNNEL_READTUNNEL)
break;
} while (ok);
}
// Not else!
if (cmd_tunnel_state == CMDGW_TUNNEL_READTUNNEL)
{
// Got "TUNNELSEND addr size\r\n" command, now read
// size bytes, i.e., cmd_tunnel_expect bytes.
if (cmd_gw_debug)
fprintf(stderr,"cmdgw: procTCPdata: tunnel state, got " PRISIZET ", want %d\n", evbuffer_get_length(cmd_evbuffer), cmd_tunnel_expect );
if (evbuffer_get_length(cmd_evbuffer) >= cmd_tunnel_expect)
{
// We have all the tunneled data
CmdGwTunnelSendUDP(cmd_evbuffer);
// Process any remaining commands that came after the tunneled data
CmdGwProcessData(cmdsock);
}
}
}
bool CmdGwReadLine(evutil_socket_t cmdsock)
{
// Parse cmd_evbuffer for lines, and call NewRequest when found
size_t rd=0;
char *cmd = evbuffer_readln(cmd_evbuffer,&rd, EVBUFFER_EOL_CRLF_STRICT);
if (cmd != NULL)
{
CmdGwNewRequestCallback(cmdsock,cmd);
free(cmd);
return true;
}
else
return false;
}
int CmdGwHandleCommand(evutil_socket_t cmdsock, char *copyline);
void CmdGwNewRequestCallback(evutil_socket_t cmdsock, char *line)
{
// New command received from user
// CMD request line
char *copyline = new char[strlen(line)+1];
strcpy(copyline,line);
int ret = CmdGwHandleCommand(cmdsock,copyline);
if (ret < 0) {
dprintf("cmd: Error processing command %s\n", line );
std::string msg = "";
if (ret == ERROR_UNKNOWN_CMD)
msg = "unknown command";
else if (ret == ERROR_MISS_ARG)
msg = "missing parameter";
else if (ret == ERROR_BAD_ARG)
msg = "bad parameter";
// BAD_SWARM already sent, and not fatal
if (msg != "")
{
CmdGwSendERRORBySocket(cmdsock,msg);
CmdGwCloseConnection(cmdsock);
}
}
delete copyline;
}
int CmdGwHandleCommand(evutil_socket_t cmdsock, char *copyline)
{
char *method=NULL,*paramstr = NULL;
char * token = strchr(copyline,' '); // split into CMD PARAM
if (token != NULL) {
*token = '\0';
paramstr = token+1;
}
else
paramstr = (char*)"";
method = copyline;
if (cmd_gw_debug)
fprintf(stderr,"cmd: GOT %s %s\n", method, paramstr);
char *savetok = NULL;
if (!strcmp(method,"START"))
{
// New START request
//fprintf(stderr,"cmd: START: new request %i\n",cmd_gw_reqs_count+1);
// Format: START url destdir\r\n
// Arno, 2012-04-13: See if URL followed by storagepath for seeding
std::string pstr = paramstr;
std::string url="",storagepath="";
int sidx = pstr.find(" ");
if (sidx == std::string::npos)
{
url = pstr;
storagepath = "";
}
else
{
url = pstr.substr(0,sidx);
storagepath = pstr.substr(sidx+1);
}
// Parse URL
parseduri_t puri;
if (!swift::ParseURI(url,puri))
{
dprintf("cmd: START: cannot parse uri %s\n", url.c_str() );
return ERROR_BAD_ARG;
}
SwarmMeta sm;
// Set configured defaults for CMDGW
sm.cont_int_prot_ = cmd_gw_cipm;
sm.live_disc_wnd_ = cmd_gw_livesource_disc_wnd;
// Convert parsed URI to config values
std::string errorstr = URIToSwarmMeta(puri,&sm);
if (errorstr != "")
{
dprintf("cmd: START: Error parsing URI: %s\n", errorstr.c_str() );
return ERROR_BAD_ARG;
}
std::string trackerstr = puri["server"];
std::string swarmidhexstr = puri["swarmidhex"];
std::string mfstr = puri["filename"];
std::string bttrackerurl = puri["et"];
std::string durstr = puri["cd"];
dprintf("cmd: START: %s with tracker %s chunksize %i duration %d\n",swarmidhexstr.c_str(),trackerstr.c_str(),sm.chunk_size_,sm.cont_dur_);
// Handle tracker
// External tracker via URL param
std::string trackerurl = "";
if (trackerstr == "" && bttrackerurl == "")
{
trackerstr = Channel::trackerurl;
if (trackerstr == "")
{
dprintf("cmd: START: tracker address must be URL server as hostname:port or ip:port, or set via ?bt=\n");
return ERROR_BAD_ARG;
}
}
// not else
if (bttrackerurl == "")
{
trackerurl = SWIFT_URI_SCHEME;
trackerurl += "://";
trackerurl += trackerstr;
}
// initiate transmission
SwarmID swarmid(swarmidhexstr);
// Arno, 2012-06-12: Check for duplicate requests
cmd_gw_t* req = CmdGwFindRequestBySwarmID(swarmid);
if (req != NULL)
{
dprintf("cmd: START: request for given root hash already exists\n");
return ERROR_BAD_ARG;
}
// Send INFO DLSTATUS_HASHCHECKING
CmdGwSendINFOHashChecking(cmdsock,swarmid);
// ARNOSMPTODO: disable/interleave hashchecking at startup
// ARNOTODO: Allow for deactivated swarms. Needs cheap tracker registration
bool activate=true;
int td = swift::Find(swarmid,activate);
if (td==-1) {
std::string filename;
if (storagepath != "")
filename = storagepath;
else
filename = swarmidhexstr;
if (durstr != "-1")
td = swift::Open(filename,swarmid,trackerurl,false,sm.cont_int_prot_,false,activate,sm.chunk_size_);
else
td = swift::LiveOpen(filename,swarmid,trackerurl,sm.injector_addr_,sm.cont_int_prot_,sm.live_disc_wnd_,sm.chunk_size_);
if (td == -1) {
CmdGwSendERRORBySocket(cmdsock,"bad swarm",swarmid);
return ERROR_BAD_SWARM;
}
}
// RATELIMIT
// swift::SetMaxSpeed(td,DDIR_DOWNLOAD,512*1024);
// All is well, register req
req = cmd_requests + cmd_gw_reqs_open++;
req->id = ++cmd_gw_reqs_count;
req->cmdsock = cmdsock;
req->td = td;
req->startt = usec_time();
req->mfspecname = mfstr;
req->playsent = false;
req->xcontentdur = puri["cd"];
req->contentlenstr = puri["cl"];
req->mimetype = puri["mt"];
dprintf("%s @%i start transfer %d\n",tintstr(),req->id,req->td);
//if (cmd_gw_debug)
// fprintf(stderr,"cmd: Already on disk is %" PRIu64 "/%" PRIu64 "\n", swift::Complete(td), swift::Size(td));
// Set progress callbacks
if (swift::ttype(req->td) == FILE_TRANSFER)
{
// MULTIFILE
uint64_t minsize=CMDGW_MAX_PREBUF_BYTES;
Storage *storage = swift::GetStorage(req->td);
if (storage == NULL)
{
dprintf("cmd: START: cannot get storage td %d\n", req->td );
CmdGwSendERRORBySocket(cmdsock,"bad swarm",swarmid);
return ERROR_BAD_SWARM;
}
storage_files_t sfs = storage->GetStorageFiles();
if (sfs.size() > 0)
minsize = sfs[0]->GetSize();
else if (swift::SeqComplete(td) > 0) // Arno, 2013-01-08: Support small files
minsize = std::min(swift::Size(td),minsize);
// Wait for first chunk, so we can handle MULTIFILE, then
// wait for prebuffering and then send PLAY to user.
// ARNOSMPTODO: OUTOFORDER: breaks with out-of-order download
if (swift::SeqComplete(td) >= minsize)
{
CmdGwSwiftVODFirstProgressCallback(td,bin_t(0,0));
CmdGwSendINFO(req, DLSTATUS_DOWNLOADING);
}
else
{
swift::AddProgressCallback(td,&CmdGwSwiftVODFirstProgressCallback,CMDGW_FIRST_PROGRESS_BYTE_INTERVAL_AS_LAYER);
}
storage->AddOneTimeAllocationCallback(CmdGwSwiftAllocatingDiskspaceCallback);
}
else
{
// LIVE
// Wait for prebuffering and then send PLAY to user
swift::AddProgressCallback(td,&CmdGwSwiftPrebufferProgressCallback,CMDGW_PREBUF_PROGRESS_BYTE_INTERVAL_AS_LAYER);
}
}
else if (!strcmp(method,"REMOVE"))
{
// REMOVE roothash removestate removecontent\r\n
bool removestate = false, removecontent = false;
token = strtok_r(paramstr," ",&savetok); //
if (token == NULL)
return ERROR_MISS_ARG;
char *swarmidhexcstr = token;
token = strtok_r(NULL," ",&savetok); // removestate
if (token == NULL)
return ERROR_MISS_ARG;
removestate = !strcmp(token,"1");
token = strtok_r(NULL,"",&savetok); // removecontent
if (token == NULL)
return ERROR_MISS_ARG;
removecontent = !strcmp(token,"1");
std::string swarmidhexstr(swarmidhexcstr);
SwarmID swarmid(swarmidhexstr);
CmdGwGotREMOVE(swarmid,removestate,removecontent);
}
else if (!strcmp(method,"MAXSPEED"))
{
// MAXSPEED roothash direction speed-float-kb/s\r\n
data_direction_t ddir;
double speed;
token = strtok_r(paramstr," ",&savetok); //
if (token == NULL)
return ERROR_MISS_ARG;
char *swarmidhexcstr = token;
token = strtok_r(NULL," ",&savetok); // direction
if (token == NULL)
return ERROR_MISS_ARG;
ddir = !strcmp(token,"DOWNLOAD") ? DDIR_DOWNLOAD : DDIR_UPLOAD;
token = strtok_r(NULL,"",&savetok); // speed
if (token == NULL)
return ERROR_MISS_ARG;
int n = sscanf(token,"%lf",&speed);
if (n == 0) {
dprintf("cmd: MAXSPEED: speed is not a float\n");
return ERROR_MISS_ARG;
}
std::string swarmidhexstr(swarmidhexcstr);
SwarmID swarmid(swarmidhexstr);
CmdGwGotMAXSPEED(swarmid,ddir,speed*1024.0);
}
else if (!strcmp(method,"CHECKPOINT"))
{
// CHECKPOINT roothash\r\n
char *swarmidhexcstr = paramstr;
std::string swarmidhexstr(swarmidhexcstr);
SwarmID swarmid(swarmidhexstr);
CmdGwGotCHECKPOINT(swarmid);
}
else if (!strcmp(method,"SETMOREINFO"))
{
// GETMOREINFO roothash toggle\r\n
token = strtok_r(paramstr," ",&savetok); // hash
if (token == NULL)
return ERROR_MISS_ARG;
char *swarmidhexcstr = token;
token = strtok_r(NULL," ",&savetok); // bool
if (token == NULL)
return ERROR_MISS_ARG;
bool enable = (bool)!strcmp(token,"1");
std::string swarmidhexstr(swarmidhexcstr);
SwarmID swarmid(swarmidhexstr);
CmdGwGotSETMOREINFO(swarmid,enable);
}
else if (!strcmp(method,"SHUTDOWN"))
{
CmdGwCloseConnection(cmdsock);
// Tell libevent to stop processing events
event_base_loopexit(Channel::evbase, NULL);
}
else if (!strcmp(method,"TUNNELSEND"))
{
token = strtok_r(paramstr,"/",&savetok); // dest addr
if (token == NULL)
return ERROR_MISS_ARG;
char *addrstr = token;
token = strtok_r(NULL," ",&savetok); // channel
if (token == NULL)
return ERROR_MISS_ARG;
char *chanstr = token;
token = strtok_r(NULL," ",&savetok); // size
if (token == NULL)
return ERROR_MISS_ARG;
char *sizestr = token;
cmd_tunnel_dest_addr = Address(addrstr);
int n = sscanf(chanstr,"%08x",&cmd_tunnel_dest_chanid);
if (n != 1)
return ERROR_BAD_ARG;
n = sscanf(sizestr,"%" PRIu32 "",&cmd_tunnel_expect);
if (n != 1)
return ERROR_BAD_ARG;
cmd_tunnel_state = CMDGW_TUNNEL_READTUNNEL;
if (cmd_gw_debug)