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/* Copyright (C) 2014 J.F.Dockes
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "upmpd.hxx"
#include <errno.h> // for errno
#include <fcntl.h> // for open, O_CREAT, O_RDWR
#include <pwd.h> // for getpwnam, passwd
#include <signal.h> // for sigaction, SIG_IGN, etc
#include <stdio.h> // for fprintf, perror, stderr
#include <stdlib.h> // for atoi, getenv, exit
#include <sys/param.h> // for MIN
#include <unistd.h> // for geteuid, chown, sleep, etc
#include <iostream> // for basic_ostream, operator<<, etc
#include <string> // for string, operator<<, etc
#include <unordered_map> // for unordered_map, etc
#include <vector> // for vector, vector<>::iterator
#include "libupnpp/device/device.hxx" // for UpnpDevice, UpnpService
#include "libupnpp/log.hxx" // for LOGFAT, LOGERR, Logger, etc
#include "libupnpp/upnpplib.hxx" // for LibUPnP
#include "avtransport.hxx" // for UpMpdAVTransport
#include "conman.hxx" // for UpMpdConMan
#include "mpdcli.hxx" // for MPDCli
#include "ohinfo.hxx" // for OHInfo
#include "ohplaylist.hxx" // for OHPlaylist
#include "ohproduct.hxx" // for OHProduct
#include "ohreceiver.hxx"
#include "ohtime.hxx" // for OHTime
#include "ohvolume.hxx" // for OHVolume
#include "renderctl.hxx" // for UpMpdRenderCtl
#include "upmpdutils.hxx" // for path_cat, Pidfile, regsub1, etc
#include "execmd.h"
using namespace std;
using namespace std::placeholders;
using namespace UPnPP;
// Note: if we ever need this to work without cxx11, there is this:
// http://www.tutok.sk/fastgl/callback.html
//
// Note that there is a problem in the order in which we do things
// here: because the UpnpDevice() constructor starts the
// advertisements and publishes the description document before the
// services are actually initialized, it is possible that a fast
// client will fail in subscribing to events, which will manifest
// itself on the server side by error messages like the following in
// the log:
// libupnpp/device/device.cxx:183::UpnpDevice: Bad serviceID:
// urn:upnp-org:serviceId:ConnectionManager
// The solution would be to have a separate init call to start the
// device at the end of the constructor code.
UpMpd::UpMpd(const string& deviceid, const string& friendlyname,
const unordered_map<string, VDirContent>& files,
MPDCli *mpdcli, Options opts)
: UpnpDevice(deviceid, files), m_mpdcli(mpdcli), m_mpds(0),
m_options(opts.options),
m_mcachefn(opts.cachefn)
{
// Note: the order is significant here as it will be used when
// calling the getStatus() methods, and we want AVTransport to
// update the mpd status for OHInfo
UpMpdRenderCtl *rdctl = new UpMpdRenderCtl(this);
m_services.push_back(rdctl);
UpMpdAVTransport* avt = new UpMpdAVTransport(this);
m_services.push_back(avt);
m_services.push_back(new UpMpdConMan(this));
bool ohReceiver = (m_options & upmpdOhReceiver) != 0;
if (m_options & upmpdDoOH) {
m_services.push_back(new OHProduct(this, friendlyname, ohReceiver));
m_services.push_back(new OHInfo(this));
m_services.push_back(new OHTime(this));
m_services.push_back(new OHVolume(this, rdctl));
OHPlaylist *ohp = new OHPlaylist(this, rdctl, opts.ohmetasleep);
m_services.push_back(ohp);
if (avt)
avt->setOHP(ohp);
if (ohReceiver) {
m_services.push_back(new OHReceiver(this, ohp, opts.schttpport));
}
}
}
UpMpd::~UpMpd()
{
for (vector<UpnpService*>::iterator it = m_services.begin();
it != m_services.end(); it++) {
delete(*it);
}
}
const MpdStatus& UpMpd::getMpdStatus()
{
m_mpds = &m_mpdcli->getStatus();
return *m_mpds;
}
/////////////////////////////////////////////////////////////////////
// Main program
#include "conftree.hxx"
static char *thisprog;
static int op_flags;
#define OPT_MOINS 0x1
#define OPT_h 0x2
#define OPT_p 0x4
#define OPT_d 0x8
#define OPT_D 0x10
#define OPT_c 0x20
#define OPT_l 0x40
#define OPT_f 0x80
#define OPT_q 0x100
#define OPT_i 0x200
#define OPT_P 0x400
#define OPT_O 0x800
static const char usage[] =
"-c configfile \t configuration file to use\n"
"-h host \t specify host MPD is running on\n"
"-p port \t specify MPD port\n"
"-d logfilename\t debug messages to\n"
"-l loglevel\t log level (0-6)\n"
"-D \t run as a daemon\n"
"-f friendlyname\t define device displayed name\n"
"-q 0|1\t if set, we own the mpd queue, else avoid clearing it whenever we feel like it\n"
"-i iface \t specify network interface name to be used for UPnP\n"
"-P upport \t specify port number to be used for UPnP\n"
"-O 0|1\t decide if we run and export the OpenHome services\n"
"\n"
;
static void
Usage(void)
{
fprintf(stderr, "%s: usage:\n%s", thisprog, usage);
exit(1);
}
// The description XML document is the first thing downloaded by
// clients and tells them what services we export, and where to find
// them.
static string ohDesc(
"<service>"
" <serviceType>urn:av-openhome-org:service:Product:1</serviceType>"
" <serviceId>urn:av-openhome-org:serviceId:Product</serviceId>"
" <SCPDURL>/upmpd/OHProduct.xml</SCPDURL>"
" <controlURL>/ctl/OHProduct</controlURL>"
" <eventSubURL>/evt/OHProduct</eventSubURL>"
"</service>"
"<service>"
" <serviceType>urn:av-openhome-org:service:Info:1</serviceType>"
" <serviceId>urn:av-openhome-org:serviceId:Info</serviceId>"
" <SCPDURL>/upmpd/OHInfo.xml</SCPDURL>"
" <controlURL>/ctl/OHInfo</controlURL>"
" <eventSubURL>/evt/OHInfo</eventSubURL>"
"</service>"
"<service>"
" <serviceType>urn:av-openhome-org:service:Time:1</serviceType>"
" <serviceId>urn:av-openhome-org:serviceId:Time</serviceId>"
" <SCPDURL>/upmpd/OHTime.xml</SCPDURL>"
" <controlURL>/ctl/OHTime</controlURL>"
" <eventSubURL>/evt/OHTime</eventSubURL>"
"</service>"
"<service>"
" <serviceType>urn:av-openhome-org:service:Volume:1</serviceType>"
" <serviceId>urn:av-openhome-org:serviceId:Volume</serviceId>"
" <SCPDURL>/upmpd/OHVolume.xml</SCPDURL>"
" <controlURL>/ctl/OHVolume</controlURL>"
" <eventSubURL>/evt/OHVolume</eventSubURL>"
"</service>"
"<service>"
" <serviceType>urn:av-openhome-org:service:Playlist:1</serviceType>"
" <serviceId>urn:av-openhome-org:serviceId:Playlist</serviceId>"
" <SCPDURL>/upmpd/OHPlaylist.xml</SCPDURL>"
" <controlURL>/ctl/OHPlaylist</controlURL>"
" <eventSubURL>/evt/OHPlaylist</eventSubURL>"
"</service>"
);
// We only advertise the Openhome Receiver service if the sc2mpd
// songcast-to-mpd gateway command is available
static string ohDescReceive(
"<service>"
" <serviceType>urn:av-openhome-org:service:Receiver:1</serviceType>"
" <serviceId>urn:av-openhome-org:serviceId:Receiver</serviceId>"
" <SCPDURL>/upmpd/OHReceiver.xml</SCPDURL>"
" <controlURL>/ctl/OHReceiver</controlURL>"
" <eventSubURL>/evt/OHReceiver</eventSubURL>"
"</service>"
);
static const string iconDesc(
"<iconList>"
" <icon>"
" <mimetype>image/png</mimetype>"
" <width>64</width>"
" <height>64</height>"
" <depth>32</depth>"
" <url>/upmpd/icon.png</url>"
" </icon>"
"</iconList>"
);
// Our XML description data. !Keep description.xml first!
static vector<const char *> xmlfilenames =
{
/* keep first */ "description.xml", /* keep first */
"RenderingControl.xml", "AVTransport.xml", "ConnectionManager.xml",
};
static vector<const char *> ohxmlfilenames =
{
"OHProduct.xml", "OHInfo.xml", "OHTime.xml", "OHVolume.xml",
"OHPlaylist.xml",
};
static const string dfltFriendlyName("UpMpd");
// This is global
string upmpdProtocolInfo;
// Static for cleanup in sig handler.
static UpnpDevice *dev;
static string datadir(DATADIR "/");
// Global
string g_configfilename(CONFIGDIR "/upmpdcli.conf");
// Path for the sc2mpd command, or empty
string g_sc2mpd_path;
static void onsig(int)
{
LOGDEB("Got sig" << endl);
dev->shouldExit();
}
static const int catchedSigs[] = {SIGINT, SIGQUIT, SIGTERM};
static void setupsigs()
{
struct sigaction action;
action.sa_handler = onsig;
action.sa_flags = 0;
sigemptyset(&action.sa_mask);
for (unsigned int i = 0; i < sizeof(catchedSigs) / sizeof(int); i++)
if (signal(catchedSigs[i], SIG_IGN) != SIG_IGN) {
if (sigaction(catchedSigs[i], &action, 0) < 0) {
perror("Sigaction failed");
}
}
}
int main(int argc, char *argv[])
{
string mpdhost("localhost");
int mpdport = 6600;
string mpdpassword;
string logfilename;
int loglevel(Logger::LLINF);
string friendlyname(dfltFriendlyName);
bool ownqueue = true;
bool openhome = true;
bool ohmetapersist = true;
string upmpdcliuser("upmpdcli");
string pidfilename("/var/run/upmpdcli.pid");
string iface;
unsigned short upport = 0;
string upnpip;
const char *cp;
if ((cp = getenv("UPMPD_HOST")))
mpdhost = cp;
if ((cp = getenv("UPMPD_PORT")))
mpdport = atoi(cp);
if ((cp = getenv("UPMPD_FRIENDLYNAME")))
friendlyname = atoi(cp);
if ((cp = getenv("UPMPD_CONFIG")))
g_configfilename = cp;
if ((cp = getenv("UPMPD_UPNPIFACE")))
iface = cp;
if ((cp = getenv("UPMPD_UPNPPORT")))
upport = atoi(cp);
thisprog = argv[0];
argc--; argv++;
while (argc > 0 && **argv == '-') {
(*argv)++;
if (!(**argv))
Usage();
while (**argv)
switch (*(*argv)++) {
case 'c': op_flags |= OPT_c; if (argc < 2) Usage();
g_configfilename = *(++argv); argc--; goto b1;
case 'D': op_flags |= OPT_D; break;
case 'd': op_flags |= OPT_d; if (argc < 2) Usage();
logfilename = *(++argv); argc--; goto b1;
case 'f': op_flags |= OPT_f; if (argc < 2) Usage();
friendlyname = *(++argv); argc--; goto b1;
case 'h': op_flags |= OPT_h; if (argc < 2) Usage();
mpdhost = *(++argv); argc--; goto b1;
case 'i': op_flags |= OPT_i; if (argc < 2) Usage();
iface = *(++argv); argc--; goto b1;
case 'l': op_flags |= OPT_l; if (argc < 2) Usage();
loglevel = atoi(*(++argv)); argc--; goto b1;
case 'O': {
op_flags |= OPT_O;
if (argc < 2) Usage();
const char *cp = *(++argv);
if (*cp == '1' || *cp == 't' || *cp == 'T' || *cp == 'y' ||
*cp == 'Y')
openhome = true;
argc--; goto b1;
}
case 'P': op_flags |= OPT_P; if (argc < 2) Usage();
upport = atoi(*(++argv)); argc--; goto b1;
case 'p': op_flags |= OPT_p; if (argc < 2) Usage();
mpdport = atoi(*(++argv)); argc--; goto b1;
case 'q': op_flags |= OPT_q; if (argc < 2) Usage();
ownqueue = atoi(*(++argv)) != 0; argc--; goto b1;
default: Usage(); break;
}
b1: argc--; argv++;
}
if (argc != 0)
Usage();
UpMpd::Options opts;
string iconpath;
string cachedir;
if (!g_configfilename.empty()) {
ConfSimple config(g_configfilename.c_str(), 1, true);
if (!config.ok()) {
cerr << "Could not open config: " << g_configfilename << endl;
return 1;
}
string value;
if (!(op_flags & OPT_d))
config.get("logfilename", logfilename);
if (!(op_flags & OPT_f))
config.get("friendlyname", friendlyname);
if (!(op_flags & OPT_l) && config.get("loglevel", value))
loglevel = atoi(value.c_str());
if (!(op_flags & OPT_h))
config.get("mpdhost", mpdhost);
if (!(op_flags & OPT_p) && config.get("mpdport", value)) {
mpdport = atoi(value.c_str());
}
config.get("mpdpassword", mpdpassword);
if (!(op_flags & OPT_q) && config.get("ownqueue", value)) {
ownqueue = atoi(value.c_str()) != 0;
}
if (config.get("openhome", value)) {
openhome = atoi(value.c_str()) != 0;
}
if (config.get("ohmetapersist", value)) {
ohmetapersist = atoi(value.c_str()) != 0;
}
config.get("iconpath", iconpath);
config.get("cachedir", cachedir);
if (!(op_flags & OPT_i)) {
config.get("upnpiface", iface);
if (iface.empty()) {
config.get("upnpip", upnpip);
}
}
if (!(op_flags & OPT_P) && config.get("upnpport", value)) {
upport = atoi(value.c_str());
}
if (config.get("schttpport", value))
opts.schttpport = atoi(value.c_str());
config.get("sc2mpd", g_sc2mpd_path);
if (config.get("ohmetasleep", value))
opts.ohmetasleep = atoi(value.c_str());
}
if (Logger::getTheLog(logfilename) == 0) {
cerr << "Can't initialize log" << endl;
return 1;
}
Logger::getTheLog("")->setLogLevel(Logger::LogLevel(loglevel));
if (g_sc2mpd_path.empty()) {
// Do we have an sc2mpd command installed (for songcast)?
if (!ExecCmd::which("sc2mpd", g_sc2mpd_path))
g_sc2mpd_path.clear();
} else {
if (access(g_sc2mpd_path.c_str(), X_OK|R_OK) != 0) {
LOGERR("Specified path for sc2mpd: " << g_sc2mpd_path <<
" is not executable" << endl);
g_sc2mpd_path.clear();
}
}
Pidfile pidfile(pidfilename);
// If started by root, do the pidfile + change uid thing
uid_t runas(0);
if (geteuid() == 0) {
struct passwd *pass = getpwnam(upmpdcliuser.c_str());
if (pass == 0) {
LOGFAT("upmpdcli won't run as root and user " << upmpdcliuser <<
" does not exist " << endl);
return 1;
}
runas = pass->pw_uid;
pid_t pid;
if ((pid = pidfile.open()) != 0) {
LOGFAT("Can't open pidfile: " << pidfile.getreason() <<
". Return (other pid?): " << pid << endl);
return 1;
}
if (pidfile.write_pid() != 0) {
LOGFAT("Can't write pidfile: " << pidfile.getreason() << endl);
return 1;
}
if (cachedir.empty())
cachedir = "/var/cache/upmpdcli";
} else {
if (cachedir.empty())
cachedir = path_cat(path_tildexpand("~") , "/.cache/upmpdcli");
}
string& mcfn = opts.cachefn;
if (ohmetapersist) {
opts.cachefn = path_cat(cachedir, "/metacache");
if (!path_makepath(cachedir, 0755)) {
LOGERR("makepath("<< cachedir << ") : errno : " << errno << endl);
} else {
int fd;
if ((fd = open(mcfn.c_str(), O_CREAT|O_RDWR, 0644)) < 0) {
LOGERR("creat("<< mcfn << ") : errno : " << errno << endl);
} else {
close(fd);
if (geteuid() == 0 && chown(mcfn.c_str(), runas, -1) != 0) {
LOGERR("chown("<< mcfn << ") : errno : " << errno << endl);
}
if (geteuid() == 0 && chown(cachedir.c_str(), runas, -1) != 0) {
LOGERR("chown("<< cachedir << ") : errno : " << errno << endl);
}
}
}
}
if ((op_flags & OPT_D)) {
if (daemon(1, 0)) {
LOGFAT("Daemon failed: errno " << errno << endl);
return 1;
}
}
if (geteuid() == 0) {
// Need to rewrite pid, it may have changed with the daemon call
pidfile.write_pid();
if (!logfilename.empty() && logfilename.compare("stderr")) {
if (chown(logfilename.c_str(), runas, -1) < 0) {
LOGERR("chown("<<logfilename<<") : errno : " << errno << endl);
}
}
if (setuid(runas) < 0) {
LOGFAT("Can't set my uid to " << runas << " current: " << geteuid()
<< endl);
return 1;
}
}
// Initialize MPD client object. Retry until it works or power fail.
MPDCli *mpdclip = 0;
int mpdretrysecs = 2;
for (;;) {
mpdclip = new MPDCli(mpdhost, mpdport, mpdpassword);
if (mpdclip == 0) {
LOGFAT("Can't allocate MPD client object" << endl);
return 1;
}
if (!mpdclip->ok()) {
LOGERR("MPD connection failed" << endl);
delete mpdclip;
mpdclip = 0;
sleep(mpdretrysecs);
mpdretrysecs = MIN(2*mpdretrysecs, 120);
} else {
break;
}
}
// Initialize libupnpp, and check health
LibUPnP *mylib = 0;
string hwaddr;
int libretrysecs = 10;
for (;;) {
// Libupnp init fails if we're started at boot and the network
// is not ready yet. So retry this forever
mylib = LibUPnP::getLibUPnP(true, &hwaddr, iface, upnpip, upport);
if (mylib) {
break;
}
sleep(libretrysecs);
libretrysecs = MIN(2*libretrysecs, 120);
}
if (!mylib->ok()) {
LOGFAT("Lib init failed: " <<
mylib->errAsString("main", mylib->getInitError()) << endl);
return 1;
}
if ((cp = getenv("UPMPDCLI_UPNPLOGFILENAME"))) {
char *cp1 = getenv("UPMPDCLI_UPNPLOGLEVEL");
int loglevel = LibUPnP::LogLevelNone;
if (cp1) {
loglevel = atoi(cp1);
}
loglevel = loglevel < 0 ? 0: loglevel;
loglevel = loglevel > int(LibUPnP::LogLevelDebug) ?
int(LibUPnP::LogLevelDebug) : loglevel;
if (loglevel != LibUPnP::LogLevelNone) {
mylib->setLogFileName(cp, LibUPnP::LogLevel(loglevel));
}
}
// Create unique ID
string UUID = LibUPnP::makeDevUUID(friendlyname, hwaddr);
// Read our XML data to make it available from the virtual directory
if (openhome) {
if (!g_sc2mpd_path.empty()) {
ohxmlfilenames.push_back("OHReceiver.xml");
}
xmlfilenames.insert(xmlfilenames.end(), ohxmlfilenames.begin(),
ohxmlfilenames.end());
}
{
string protofile = path_cat(datadir, "protocolinfo.txt");
if (!read_protocolinfo(protofile, upmpdProtocolInfo)) {
LOGFAT("Failed reading protocol info from " << protofile << endl);
return 1;
}
}
string reason;
string icondata;
if (!iconpath.empty()) {
if (!file_to_string(iconpath, icondata, &reason)) {
LOGERR("Failed reading " << iconpath << " : " << reason << endl);
}
}
unordered_map<string, VDirContent> files;
string dir("/upmpd/");
for (unsigned int i = 0; i < xmlfilenames.size(); i++) {
string filename = path_cat(datadir, xmlfilenames[i]);
string data;
if (!file_to_string(filename, data, &reason)) {
LOGFAT("Failed reading " << filename << " : " << reason << endl);
return 1;
}
if (i == 0) {
// Special for description: set UUID and friendlyname
data = regsub1("@UUID@", data, UUID);
data = regsub1("@FRIENDLYNAME@", data, friendlyname);
if (openhome) {
if (!g_sc2mpd_path.empty()) {
ohDesc += ohDescReceive;
}
data = regsub1("@OPENHOME@", data, ohDesc);
} else {
data = regsub1("@OPENHOME@", data, "");
}
if (!icondata.empty())
data = regsub1("@ICONLIST@", data, iconDesc);
else
data = regsub1("@ICONLIST@", data, "");
}
files.insert(pair<string, VDirContent>
(dir + xmlfilenames[i],
VDirContent(data, "application/xml")));
}
if (!icondata.empty()) {
files.insert(pair<string, VDirContent>
(dir + "icon.png", VDirContent(icondata, "image/png")));
}
if (ownqueue)
opts.options |= UpMpd::upmpdOwnQueue;
if (openhome)
opts.options |= UpMpd::upmpdDoOH;
if (ohmetapersist)
opts.options |= UpMpd::upmpdOhMetaPersist;
if (!g_sc2mpd_path.empty())
opts.options |= UpMpd::upmpdOhReceiver;
// Initialize the UPnP device object.
UpMpd device(string("uuid:") + UUID, friendlyname,
files, mpdclip, opts);
dev = &device;
// And forever generate state change events.
LOGDEB("Entering event loop" << endl);
setupsigs();
device.eventloop();
LOGDEB("Event loop returned" << endl);
return 0;
}