input/smbclient: new input plugin

1 files changed, 203 insertions, 0 deletions

diff --git a/src/input/SmbclientInputPlugin.cxx b/src/input/SmbclientInputPlugin.cxx
new file mode 100644
index 000000000..f97aff7d5
--- /dev/null
+++ b/src/input/SmbclientInputPlugin.cxx
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2003-2013 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 "SmbclientInputPlugin.hxx"
+#include "InputStream.hxx"
+#include "InputPlugin.hxx"
+#include "util/StringUtil.hxx"
+#include "util/Error.hxx"
+
+#include <libsmbclient.h>
+
+#include <string.h>
+
+class SmbclientInputStream {
+	InputStream base;
+
+	SMBCCTX *ctx;
+	int fd;
+
+public:
+	SmbclientInputStream(const char *uri,
+			     Mutex &mutex, Cond &cond,
+			     SMBCCTX *_ctx, int _fd, const struct stat &st)
+		:base(input_plugin_smbclient, uri, mutex, cond),
+		 ctx(_ctx), fd(_fd) {
+		base.ready = true;
+		base.seekable = true;
+		base.size = st.st_size;
+	}
+
+	~SmbclientInputStream() {
+		smbc_close(fd);
+		smbc_free_context(ctx, 1);
+	}
+
+	InputStream *GetBase() {
+		return &base;
+	}
+
+	bool IsEOF() const {
+		return base.offset >= base.size;
+	}
+
+	size_t Read(void *ptr, size_t size, Error &error) {
+		ssize_t nbytes = smbc_read(fd, ptr, size);
+		if (nbytes < 0) {
+			error.SetErrno("smbc_read() failed");
+			nbytes = 0;
+		}
+
+		return nbytes;
+	}
+
+	bool Seek(InputStream::offset_type offset, int whence, Error &error) {
+		off_t result = smbc_lseek(fd, offset, whence);
+		if (result < 0) {
+			error.SetErrno("smbc_lseek() failed");
+			return false;
+		}
+
+		base.offset = result;
+		return true;
+	}
+};
+
+static void
+mpd_smbc_get_auth_data(gcc_unused const char *srv,
+		       gcc_unused const char *shr,
+		       char *wg, gcc_unused int wglen,
+		       char *un, gcc_unused int unlen,
+		       char *pw, gcc_unused int pwlen)
+{
+	// TODO: implement
+	strcpy(wg, "WORKGROUP");
+	strcpy(un, "foo");
+	strcpy(pw, "bar");
+}
+
+/*
+ * InputPlugin methods
+ *
+ */
+
+static bool
+input_smbclient_init(gcc_unused const config_param &param, Error &error)
+{
+	constexpr int debug = 0;
+	if (smbc_init(mpd_smbc_get_auth_data, debug) < 0) {
+		error.SetErrno("smbc_init() failed");
+		return false;
+	}
+
+	// TODO: create one global SMBCCTX here?
+
+	// TODO: evaluate config_param, call smbc_setOption*()
+
+	return true;
+}
+
+static InputStream *
+input_smbclient_open(const char *uri,
+		     Mutex &mutex, Cond &cond,
+		     Error &error)
+{
+	if (!StringStartsWith(uri, "smb://"))
+		return nullptr;
+
+	SMBCCTX *ctx = smbc_new_context();
+	if (ctx == nullptr) {
+		error.SetErrno("smbc_new_context() failed");
+		return nullptr;
+	}
+
+	SMBCCTX *ctx2 = smbc_init_context(ctx);
+	if (ctx2 == nullptr) {
+		error.SetErrno("smbc_init_context() failed");
+		smbc_free_context(ctx, 1);
+		return nullptr;
+	}
+
+	ctx = ctx2;
+
+	int fd = smbc_open(uri, O_RDONLY, 0);
+	if (fd < 0) {
+		error.SetErrno("smbc_open() failed");
+		smbc_free_context(ctx, 1);
+		return nullptr;
+	}
+
+	struct stat st;
+	if (smbc_fstat(fd, &st) < 0) {
+		error.SetErrno("smbc_fstat() failed");
+		smbc_close(fd);
+		smbc_free_context(ctx, 1);
+		return nullptr;
+	}
+
+	auto s = new SmbclientInputStream(uri, mutex, cond, ctx, fd, st);
+	return s->GetBase();
+}
+
+static size_t
+input_smbclient_read(InputStream *is, void *ptr, size_t size,
+		     Error &error)
+{
+	SmbclientInputStream &s = *(SmbclientInputStream *)is;
+	return s.Read(ptr, size, error);
+}
+
+static void
+input_smbclient_close(InputStream *is)
+{
+	SmbclientInputStream *s = (SmbclientInputStream *)is;
+	delete s;
+}
+
+static bool
+input_smbclient_eof(InputStream *is)
+{
+	SmbclientInputStream &s = *(SmbclientInputStream *)is;
+	return s.IsEOF();
+}
+
+static bool
+input_smbclient_seek(InputStream *is,
+		     InputPlugin::offset_type offset, int whence,
+		     Error &error)
+{
+	SmbclientInputStream &s = *(SmbclientInputStream *)is;
+	return s.Seek(offset, whence, error);
+}
+
+const InputPlugin input_plugin_smbclient = {
+	"smbclient",
+	input_smbclient_init,
+	nullptr,
+	input_smbclient_open,
+	input_smbclient_close,
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
+	input_smbclient_read,
+	input_smbclient_eof,
+	input_smbclient_seek,
+};