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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 "SmbclientInputPlugin.hxx"
#include "lib/smbclient/Init.hxx"
#include "lib/smbclient/Mutex.hxx"
#include "../InputStream.hxx"
#include "../InputPlugin.hxx"
#include "util/StringUtil.hxx"
#include "util/Error.hxx"
#include <libsmbclient.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() {
smbclient_mutex.lock();
smbc_close(fd);
smbc_free_context(ctx, 1);
smbclient_mutex.unlock();
}
InputStream *GetBase() {
return &base;
}
bool IsEOF() const {
return base.offset >= base.size;
}
size_t Read(void *ptr, size_t size, Error &error) {
smbclient_mutex.lock();
ssize_t nbytes = smbc_read(fd, ptr, size);
smbclient_mutex.unlock();
if (nbytes < 0) {
error.SetErrno("smbc_read() failed");
nbytes = 0;
}
return nbytes;
}
bool Seek(InputStream::offset_type offset, int whence, Error &error) {
smbclient_mutex.lock();
off_t result = smbc_lseek(fd, offset, whence);
smbclient_mutex.unlock();
if (result < 0) {
error.SetErrno("smbc_lseek() failed");
return false;
}
base.offset = result;
return true;
}
};
/*
* InputPlugin methods
*
*/
static bool
input_smbclient_init(gcc_unused const config_param ¶m, Error &error)
{
if (!SmbclientInit(error))
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;
const ScopeLock protect(smbclient_mutex);
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,
};
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