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diff --git a/src/db/plugins/UpnpDatabasePlugin.cxx b/src/db/plugins/UpnpDatabasePlugin.cxx
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+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "UpnpDatabasePlugin.hxx"
+#include "lib/upnp/Domain.hxx"
+#include "lib/upnp/ClientInit.hxx"
+#include "lib/upnp/Discovery.hxx"
+#include "lib/upnp/ContentDirectoryService.hxx"
+#include "lib/upnp/Util.hxx"
+#include "upnp/Directory.hxx"
+#include "upnp/Tags.hxx"
+#include "db/DatabasePlugin.hxx"
+#include "db/Selection.hxx"
+#include "db/DatabaseError.hxx"
+#include "db/LightDirectory.hxx"
+#include "db/LightSong.hxx"
+#include "config/ConfigData.hxx"
+#include "tag/TagBuilder.hxx"
+#include "tag/TagTable.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "fs/Traits.hxx"
+#include "Log.hxx"
+#include "SongFilter.hxx"
+
+#include <string>
+#include <vector>
+#include <set>
+
+#include <assert.h>
+#include <string.h>
+
+static const char *const rootid = "0";
+
+class UpnpSong : public LightSong {
+ std::string uri2, real_uri2;
+
+ Tag tag2;
+
+public:
+ UpnpSong(UPnPDirObject &&object, std::string &&_uri)
+ :uri2(std::move(_uri)),
+ real_uri2(std::move(object.url)),
+ tag2(std::move(object.tag)) {
+ directory = nullptr;
+ uri = uri2.c_str();
+ real_uri = real_uri2.c_str();
+ tag = &tag2;
+ mtime = 0;
+ start_ms = end_ms = 0;
+ }
+};
+
+class UpnpDatabase : public Database {
+ UpnpClient_Handle handle;
+ UPnPDeviceDirectory *discovery;
+
+public:
+ static Database *Create(EventLoop &loop, DatabaseListener &listener,
+ const config_param &param,
+ Error &error);
+
+ virtual bool Open(Error &error) override;
+ virtual void Close() override;
+ virtual const LightSong *GetSong(const char *uri_utf8,
+ Error &error) const override;
+ virtual void ReturnSong(const LightSong *song) const;
+
+ virtual bool Visit(const DatabaseSelection &selection,
+ VisitDirectory visit_directory,
+ VisitSong visit_song,
+ VisitPlaylist visit_playlist,
+ Error &error) const override;
+
+ virtual bool VisitUniqueTags(const DatabaseSelection &selection,
+ TagType tag_type,
+ VisitString visit_string,
+ Error &error) const override;
+
+ virtual bool GetStats(const DatabaseSelection &selection,
+ DatabaseStats &stats,
+ Error &error) const override;
+ virtual time_t GetUpdateStamp() const {return 0;}
+
+protected:
+ bool Configure(const config_param &param, Error &error);
+
+private:
+ bool VisitServer(const ContentDirectoryService &server,
+ const std::list<std::string> &vpath,
+ const DatabaseSelection &selection,
+ VisitDirectory visit_directory,
+ VisitSong visit_song,
+ VisitPlaylist visit_playlist,
+ Error &error) const;
+
+ /**
+ * Run an UPnP search according to MPD parameters, and
+ * visit_song the results.
+ */
+ bool SearchSongs(const ContentDirectoryService &server,
+ const char *objid,
+ const DatabaseSelection &selection,
+ VisitSong visit_song,
+ Error &error) const;
+
+ bool SearchSongs(const ContentDirectoryService &server,
+ const char *objid,
+ const DatabaseSelection &selection,
+ UPnPDirContent& dirbuf,
+ Error &error) const;
+
+ bool Namei(const ContentDirectoryService &server,
+ const std::list<std::string> &vpath,
+ UPnPDirObject &dirent,
+ Error &error) const;
+
+ /**
+ * Take server and objid, return metadata.
+ */
+ bool ReadNode(const ContentDirectoryService &server,
+ const char *objid, UPnPDirObject& dirent,
+ Error &error) const;
+
+ /**
+ * Get the path for an object Id. This works much like pwd,
+ * except easier cause our inodes have a parent id. Not used
+ * any more actually (see comments in SearchSongs).
+ */
+ bool BuildPath(const ContentDirectoryService &server,
+ const UPnPDirObject& dirent, std::string &idpath,
+ Error &error) const;
+};
+
+Database *
+UpnpDatabase::Create(gcc_unused EventLoop &loop,
+ gcc_unused DatabaseListener &listener,
+ const config_param &param, Error &error)
+{
+ UpnpDatabase *db = new UpnpDatabase();
+ if (!db->Configure(param, error)) {
+ delete db;
+ return nullptr;
+ }
+
+ /* libupnp loses its ability to receive multicast messages
+ apparently due to daemonization; using the LazyDatabase
+ wrapper works around this problem */
+ return db;
+}
+
+inline bool
+UpnpDatabase::Configure(const config_param &, Error &)
+{
+ return true;
+}
+
+bool
+UpnpDatabase::Open(Error &error)
+{
+ if (!UpnpClientGlobalInit(handle, error))
+ return false;
+
+ discovery = new UPnPDeviceDirectory(handle);
+ if (!discovery->Start(error)) {
+ delete discovery;
+ UpnpClientGlobalFinish();
+ return false;
+ }
+
+ return true;
+}
+
+void
+UpnpDatabase::Close()
+{
+ delete discovery;
+ UpnpClientGlobalFinish();
+}
+
+void
+UpnpDatabase::ReturnSong(const LightSong *_song) const
+{
+ assert(_song != nullptr);
+
+ UpnpSong *song = (UpnpSong *)const_cast<LightSong *>(_song);
+ delete song;
+}
+
+// Get song info by path. We can receive either the id path, or the titles
+// one
+const LightSong *
+UpnpDatabase::GetSong(const char *uri, Error &error) const
+{
+ auto vpath = stringToTokens(uri, "/", true);
+ if (vpath.size() < 2) {
+ error.Format(db_domain, DB_NOT_FOUND, "No such song: %s", uri);
+ return nullptr;
+ }
+
+ ContentDirectoryService server;
+ if (!discovery->getServer(vpath.front().c_str(), server, error))
+ return nullptr;
+
+ vpath.pop_front();
+
+ UPnPDirObject dirent;
+ if (vpath.front() != rootid) {
+ if (!Namei(server, vpath, dirent, error))
+ return nullptr;
+ } else {
+ if (!ReadNode(server, vpath.back().c_str(), dirent,
+ error))
+ return nullptr;
+ }
+
+ return new UpnpSong(std::move(dirent), uri);
+}
+
+/**
+ * Double-quote a string, adding internal backslash escaping.
+ */
+static void
+dquote(std::string &out, const char *in)
+{
+ out.push_back('"');
+
+ for (; *in != 0; ++in) {
+ switch(*in) {
+ case '\\':
+ case '"':
+ out.push_back('\\');
+ break;
+ }
+
+ out.push_back(*in);
+ }
+
+ out.push_back('"');
+}
+
+// Run an UPnP search, according to MPD parameters. Return results as
+// UPnP items
+bool
+UpnpDatabase::SearchSongs(const ContentDirectoryService &server,
+ const char *objid,
+ const DatabaseSelection &selection,
+ UPnPDirContent &dirbuf,
+ Error &error) const
+{
+ const SongFilter *filter = selection.filter;
+ if (selection.filter == nullptr)
+ return true;
+
+ std::list<std::string> searchcaps;
+ if (!server.getSearchCapabilities(handle, searchcaps, error))
+ return false;
+
+ if (searchcaps.empty())
+ return true;
+
+ std::string cond;
+ for (const auto &item : filter->GetItems()) {
+ switch (auto tag = item.GetTag()) {
+ case LOCATE_TAG_ANY_TYPE:
+ {
+ if (!cond.empty()) {
+ cond += " and ";
+ }
+ cond += '(';
+ bool first(true);
+ for (const auto& cap : searchcaps) {
+ if (first)
+ first = false;
+ else
+ cond += " or ";
+ cond += cap;
+ if (item.GetFoldCase()) {
+ cond += " contains ";
+ } else {
+ cond += " = ";
+ }
+ dquote(cond, item.GetValue().c_str());
+ }
+ cond += ')';
+ }
+ break;
+
+ default:
+ /* Unhandled conditions like
+ LOCATE_TAG_BASE_TYPE or
+ LOCATE_TAG_FILE_TYPE won't have a
+ corresponding upnp prop, so they will be
+ skipped */
+ if (tag == TAG_ALBUM_ARTIST)
+ tag = TAG_ARTIST;
+
+ // TODO: support LOCATE_TAG_ANY_TYPE etc.
+ const char *name = tag_table_lookup(upnp_tags,
+ TagType(tag));
+ if (name == nullptr)
+ continue;
+
+ if (!cond.empty()) {
+ cond += " and ";
+ }
+ cond += name;
+
+ /* FoldCase doubles up as contains/equal
+ switch. UpNP search is supposed to be
+ case-insensitive, but at least some servers
+ have the same convention as mpd (e.g.:
+ minidlna) */
+ if (item.GetFoldCase()) {
+ cond += " contains ";
+ } else {
+ cond += " = ";
+ }
+ dquote(cond, item.GetValue().c_str());
+ }
+ }
+
+ return server.search(handle,
+ objid, cond.c_str(), dirbuf,
+ error);
+}
+
+static bool
+visitSong(const UPnPDirObject &meta, const char *path,
+ const DatabaseSelection &selection,
+ VisitSong visit_song, Error& error)
+{
+ if (!visit_song)
+ return true;
+
+ LightSong song;
+ song.directory = nullptr;
+ song.uri = path;
+ song.real_uri = meta.url.c_str();
+ song.tag = &meta.tag;
+ song.mtime = 0;
+ song.start_ms = song.end_ms = 0;
+
+ return !selection.Match(song) || visit_song(song, error);
+}
+
+/**
+ * Build synthetic path based on object id for search results. The use
+ * of "rootid" is arbitrary, any name that is not likely to be a top
+ * directory name would fit.
+ */
+static std::string
+songPath(const std::string &servername,
+ const std::string &objid)
+{
+ return servername + "/" + rootid + "/" + objid;
+}
+
+bool
+UpnpDatabase::SearchSongs(const ContentDirectoryService &server,
+ const char *objid,
+ const DatabaseSelection &selection,
+ VisitSong visit_song,
+ Error &error) const
+{
+ UPnPDirContent dirbuf;
+ if (!visit_song)
+ return true;
+ if (!SearchSongs(server, objid, selection, dirbuf, error))
+ return false;
+
+ for (auto &dirent : dirbuf.objects) {
+ if (dirent.type != UPnPDirObject::Type::ITEM ||
+ dirent.item_class != UPnPDirObject::ItemClass::MUSIC)
+ continue;
+
+ // We get song ids as the result of the UPnP search. But our
+ // client expects paths (e.g. we get 1$4$3788 from minidlna,
+ // but we need to translate to /Music/All_Music/Satisfaction).
+ // We can do this in two ways:
+ // - Rebuild a normal path using BuildPath() which is a kind of pwd
+ // - Build a bogus path based on the song id.
+ // The first method is nice because the returned paths are pretty, but
+ // it has two big problems:
+ // - The song paths are ambiguous: e.g. minidlna returns all search
+ // results as being from the "All Music" directory, which can
+ // contain several songs with the same title (but different objids)
+ // - The performance of BuildPath() is atrocious on very big
+ // directories, even causing timeouts in clients. And of
+ // course, 'All Music' is very big.
+ // So we return synthetic and ugly paths based on the object id,
+ // which we later have to detect.
+ const std::string path = songPath(server.getFriendlyName(),
+ dirent.m_id);
+ if (!visitSong(std::move(dirent), path.c_str(),
+ selection, visit_song,
+ error))
+ return false;
+ }
+
+ return true;
+}
+
+bool
+UpnpDatabase::ReadNode(const ContentDirectoryService &server,
+ const char *objid, UPnPDirObject &dirent,
+ Error &error) const
+{
+ UPnPDirContent dirbuf;
+ if (!server.getMetadata(handle, objid, dirbuf, error))
+ return false;
+
+ if (dirbuf.objects.size() == 1) {
+ dirent = std::move(dirbuf.objects.front());
+ } else {
+ error.Format(upnp_domain, "Bad resource");
+ return false;
+ }
+
+ return true;
+}
+
+bool
+UpnpDatabase::BuildPath(const ContentDirectoryService &server,
+ const UPnPDirObject& idirent,
+ std::string &path,
+ Error &error) const
+{
+ const char *pid = idirent.m_id.c_str();
+ path.clear();
+ UPnPDirObject dirent;
+ while (strcmp(pid, rootid) != 0) {
+ if (!ReadNode(server, pid, dirent, error))
+ return false;
+ pid = dirent.m_pid.c_str();
+
+ if (path.empty())
+ path = dirent.name;
+ else
+ path = PathTraitsUTF8::Build(dirent.name.c_str(),
+ path.c_str());
+ }
+
+ path = PathTraitsUTF8::Build(server.getFriendlyName(),
+ path.c_str());
+ return true;
+}
+
+// Take server and internal title pathname and return objid and metadata.
+bool
+UpnpDatabase::Namei(const ContentDirectoryService &server,
+ const std::list<std::string> &vpath,
+ UPnPDirObject &odirent,
+ Error &error) const
+{
+ if (vpath.empty()) {
+ // looking for root info
+ if (!ReadNode(server, rootid, odirent, error))
+ return false;
+
+ return true;
+ }
+
+ std::string objid(rootid);
+
+ // Walk the path elements, read each directory and try to find the next one
+ for (auto i = vpath.begin(), last = std::prev(vpath.end());; ++i) {
+ UPnPDirContent dirbuf;
+ if (!server.readDir(handle, objid.c_str(), dirbuf, error))
+ return false;
+
+ // Look for the name in the sub-container list
+ UPnPDirObject *child = dirbuf.FindObject(i->c_str());
+ if (child == nullptr) {
+ error.Format(db_domain, DB_NOT_FOUND,
+ "No such object");
+ return false;
+ }
+
+ if (i == last) {
+ odirent = std::move(*child);
+ return true;
+ }
+
+ if (child->type != UPnPDirObject::Type::CONTAINER) {
+ error.Format(db_domain, DB_NOT_FOUND,
+ "Not a container");
+ return false;
+ }
+
+ objid = std::move(child->m_id);
+ }
+}
+
+static bool
+VisitItem(const UPnPDirObject &object, const char *uri,
+ const DatabaseSelection &selection,
+ VisitSong visit_song, VisitPlaylist visit_playlist,
+ Error &error)
+{
+ assert(object.type == UPnPDirObject::Type::ITEM);
+
+ switch (object.item_class) {
+ case UPnPDirObject::ItemClass::MUSIC:
+ return !visit_song ||
+ visitSong(object, uri,
+ selection, visit_song, error);
+
+ case UPnPDirObject::ItemClass::PLAYLIST:
+ if (visit_playlist) {
+ /* Note: I've yet to see a
+ playlist item (playlists
+ seem to be usually handled
+ as containers, so I'll
+ decide what to do when I
+ see one... */
+ }
+
+ return true;
+
+ case UPnPDirObject::ItemClass::UNKNOWN:
+ return true;
+ }
+
+ assert(false);
+ gcc_unreachable();
+}
+
+static bool
+VisitObject(const UPnPDirObject &object, const char *uri,
+ const DatabaseSelection &selection,
+ VisitDirectory visit_directory,
+ VisitSong visit_song,
+ VisitPlaylist visit_playlist,
+ Error &error)
+{
+ switch (object.type) {
+ case UPnPDirObject::Type::UNKNOWN:
+ assert(false);
+ gcc_unreachable();
+
+ case UPnPDirObject::Type::CONTAINER:
+ return !visit_directory ||
+ visit_directory(LightDirectory(uri, 0), error);
+
+ case UPnPDirObject::Type::ITEM:
+ return VisitItem(object, uri, selection,
+ visit_song, visit_playlist,
+ error);
+ }
+
+ assert(false);
+ gcc_unreachable();
+}
+
+// vpath is a parsed and writeable version of selection.uri. There is
+// really just one path parameter.
+bool
+UpnpDatabase::VisitServer(const ContentDirectoryService &server,
+ const std::list<std::string> &vpath,
+ const DatabaseSelection &selection,
+ VisitDirectory visit_directory,
+ VisitSong visit_song,
+ VisitPlaylist visit_playlist,
+ Error &error) const
+{
+ /* If the path begins with rootid, we know that this is a
+ song, not a directory (because that's how we set things
+ up). Just visit it. Note that the choice of rootid is
+ arbitrary, any value not likely to be the name of a top
+ directory would be ok. */
+ /* !Note: this *can't* be handled by Namei further down,
+ because the path is not valid for traversal. Besides, it's
+ just faster to access the target node directly */
+ if (!vpath.empty() && vpath.front() == rootid) {
+ switch (vpath.size()) {
+ case 1:
+ return true;
+
+ case 2:
+ break;
+
+ default:
+ error.Format(db_domain, DB_NOT_FOUND,
+ "Not found");
+ return false;
+ }
+
+ if (visit_song) {
+ UPnPDirObject dirent;
+ if (!ReadNode(server, vpath.back().c_str(), dirent,
+ error))
+ return false;
+
+ if (dirent.type != UPnPDirObject::Type::ITEM ||
+ dirent.item_class != UPnPDirObject::ItemClass::MUSIC) {
+ error.Format(db_domain, DB_NOT_FOUND,
+ "Not found");
+ return false;
+ }
+
+ std::string path = songPath(server.getFriendlyName(),
+ dirent.m_id);
+ if (!visitSong(std::move(dirent), path.c_str(),
+ selection,
+ visit_song, error))
+ return false;
+ }
+ return true;
+ }
+
+ // Translate the target path into an object id and the associated metadata.
+ UPnPDirObject tdirent;
+ if (!Namei(server, vpath, tdirent, error))
+ return false;
+
+ /* If recursive is set, this is a search... No use sending it
+ if the filter is empty. In this case, we implement limited
+ recursion (1-deep) here, which will handle the "add dir"
+ case. */
+ if (selection.recursive && selection.filter)
+ return SearchSongs(server, tdirent.m_id.c_str(), selection,
+ visit_song, error);
+
+ const char *const base_uri = selection.uri.empty()
+ ? server.getFriendlyName()
+ : selection.uri.c_str();
+
+ if (tdirent.type == UPnPDirObject::Type::ITEM) {
+ return VisitItem(tdirent, base_uri,
+ selection,
+ visit_song, visit_playlist,
+ error);
+ }
+
+ /* Target was a a container. Visit it. We could read slices
+ and loop here, but it's not useful as mpd will only return
+ data to the client when we're done anyway. */
+ UPnPDirContent dirbuf;
+ if (!server.readDir(handle, tdirent.m_id.c_str(), dirbuf,
+ error))
+ return false;
+
+ for (auto &dirent : dirbuf.objects) {
+ const std::string uri = PathTraitsUTF8::Build(base_uri,
+ dirent.name.c_str());
+ if (!VisitObject(dirent, uri.c_str(),
+ selection,
+ visit_directory,
+ visit_song, visit_playlist,
+ error))
+ return false;
+ }
+
+ return true;
+}
+
+// Deal with the possibly multiple servers, call VisitServer if needed.
+bool
+UpnpDatabase::Visit(const DatabaseSelection &selection,
+ VisitDirectory visit_directory,
+ VisitSong visit_song,
+ VisitPlaylist visit_playlist,
+ Error &error) const
+{
+ auto vpath = stringToTokens(selection.uri, "/", true);
+ if (vpath.empty()) {
+ std::vector<ContentDirectoryService> servers;
+ if (!discovery->getDirServices(servers, error))
+ return false;
+
+ for (const auto &server : servers) {
+ if (visit_directory) {
+ const LightDirectory d(server.getFriendlyName(), 0);
+ if (!visit_directory(d, error))
+ return false;
+ }
+
+ if (selection.recursive &&
+ !VisitServer(server, vpath, selection,
+ visit_directory, visit_song, visit_playlist,
+ error))
+ return false;
+ }
+
+ return true;
+ }
+
+ // We do have a path: the first element selects the server
+ std::string servername(std::move(vpath.front()));
+ vpath.pop_front();
+
+ ContentDirectoryService server;
+ if (!discovery->getServer(servername.c_str(), server, error))
+ return false;
+
+ return VisitServer(server, vpath, selection,
+ visit_directory, visit_song, visit_playlist, error);
+}
+
+bool
+UpnpDatabase::VisitUniqueTags(const DatabaseSelection &selection,
+ TagType tag,
+ VisitString visit_string,
+ Error &error) const
+{
+ if (!visit_string)
+ return true;
+
+ std::vector<ContentDirectoryService> servers;
+ if (!discovery->getDirServices(servers, error))
+ return false;
+
+ std::set<std::string> values;
+ for (auto& server : servers) {
+ UPnPDirContent dirbuf;
+ if (!SearchSongs(server, rootid, selection, dirbuf, error))
+ return false;
+
+ for (const auto &dirent : dirbuf.objects) {
+ if (dirent.type != UPnPDirObject::Type::ITEM ||
+ dirent.item_class != UPnPDirObject::ItemClass::MUSIC)
+ continue;
+
+ const char *value = dirent.tag.GetValue(tag);
+ if (value != nullptr) {
+#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+ values.emplace(value);
+#else
+ values.insert(value);
+#endif
+ }
+ }
+ }
+
+ for (const auto& value : values)
+ if (!visit_string(value.c_str(), error))
+ return false;
+
+ return true;
+}
+
+bool
+UpnpDatabase::GetStats(const DatabaseSelection &,
+ DatabaseStats &stats, Error &) const
+{
+ /* Note: this gets called before the daemonizing so we can't
+ reallyopen this would be a problem if we had real stats */
+ stats.song_count = 0;
+ stats.total_duration = 0;
+ stats.artist_count = 0;
+ stats.album_count = 0;
+ return true;
+}
+
+const DatabasePlugin upnp_db_plugin = {
+ "upnp",
+ UpnpDatabase::Create,
+};
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