384 lines
10 KiB
C
384 lines
10 KiB
C
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/*
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* Copyright (c) 2014 Lukasz Marek <lukasz.m.luki@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <libsmbclient.h>
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#include "libavutil/avstring.h"
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#include "libavutil/opt.h"
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#include "avformat.h"
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#include "internal.h"
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#include "url.h"
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typedef struct {
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const AVClass *class;
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SMBCCTX *ctx;
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int dh;
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int fd;
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int64_t filesize;
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int trunc;
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int timeout;
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char *workgroup;
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} LIBSMBContext;
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static void libsmbc_get_auth_data(SMBCCTX *c, const char *server, const char *share,
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char *workgroup, int workgroup_len,
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char *username, int username_len,
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char *password, int password_len)
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{
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/* Do nothing yet. Credentials are passed via url.
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* Callback must exists, there might be a segmentation fault otherwise. */
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}
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static av_cold int libsmbc_connect(URLContext *h)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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libsmbc->ctx = smbc_new_context();
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if (!libsmbc->ctx) {
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int ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "Cannot create context: %s.\n", strerror(errno));
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return ret;
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}
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if (!smbc_init_context(libsmbc->ctx)) {
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int ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "Cannot initialize context: %s.\n", strerror(errno));
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return ret;
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}
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smbc_set_context(libsmbc->ctx);
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smbc_setOptionUserData(libsmbc->ctx, h);
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smbc_setFunctionAuthDataWithContext(libsmbc->ctx, libsmbc_get_auth_data);
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if (libsmbc->timeout != -1)
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smbc_setTimeout(libsmbc->ctx, libsmbc->timeout);
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if (libsmbc->workgroup)
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smbc_setWorkgroup(libsmbc->ctx, libsmbc->workgroup);
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if (smbc_init(NULL, 0) < 0) {
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int ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "Initialization failed: %s\n", strerror(errno));
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return ret;
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}
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return 0;
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}
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static av_cold int libsmbc_close(URLContext *h)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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if (libsmbc->fd >= 0) {
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smbc_close(libsmbc->fd);
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libsmbc->fd = -1;
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}
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if (libsmbc->ctx) {
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smbc_free_context(libsmbc->ctx, 1);
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libsmbc->ctx = NULL;
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}
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return 0;
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}
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static av_cold int libsmbc_open(URLContext *h, const char *url, int flags)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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int access, ret;
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struct stat st;
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libsmbc->fd = -1;
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libsmbc->filesize = -1;
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if ((ret = libsmbc_connect(h)) < 0)
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goto fail;
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if ((flags & AVIO_FLAG_WRITE) && (flags & AVIO_FLAG_READ)) {
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access = O_CREAT | O_RDWR;
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if (libsmbc->trunc)
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access |= O_TRUNC;
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} else if (flags & AVIO_FLAG_WRITE) {
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access = O_CREAT | O_WRONLY;
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if (libsmbc->trunc)
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access |= O_TRUNC;
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} else
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access = O_RDONLY;
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/* 0666 = -rw-rw-rw- = read+write for everyone, minus umask */
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if ((libsmbc->fd = smbc_open(url, access, 0666)) < 0) {
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ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "File open failed: %s\n", strerror(errno));
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goto fail;
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}
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if (smbc_fstat(libsmbc->fd, &st) < 0)
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av_log(h, AV_LOG_WARNING, "Cannot stat file: %s\n", strerror(errno));
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else
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libsmbc->filesize = st.st_size;
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return 0;
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fail:
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libsmbc_close(h);
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return ret;
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}
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static int64_t libsmbc_seek(URLContext *h, int64_t pos, int whence)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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int64_t newpos;
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if (whence == AVSEEK_SIZE) {
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if (libsmbc->filesize == -1) {
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av_log(h, AV_LOG_ERROR, "Error during seeking: filesize is unknown.\n");
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return AVERROR(EIO);
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} else
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return libsmbc->filesize;
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}
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if ((newpos = smbc_lseek(libsmbc->fd, pos, whence)) < 0) {
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int err = errno;
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av_log(h, AV_LOG_ERROR, "Error during seeking: %s\n", strerror(err));
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return AVERROR(err);
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}
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return newpos;
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}
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static int libsmbc_read(URLContext *h, unsigned char *buf, int size)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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int bytes_read;
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if ((bytes_read = smbc_read(libsmbc->fd, buf, size)) < 0) {
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int ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "Read error: %s\n", strerror(errno));
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return ret;
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}
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return bytes_read ? bytes_read : AVERROR_EOF;
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}
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static int libsmbc_write(URLContext *h, const unsigned char *buf, int size)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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int bytes_written;
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if ((bytes_written = smbc_write(libsmbc->fd, buf, size)) < 0) {
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int ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "Write error: %s\n", strerror(errno));
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return ret;
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}
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return bytes_written;
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}
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static int libsmbc_open_dir(URLContext *h)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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int ret;
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if ((ret = libsmbc_connect(h)) < 0)
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goto fail;
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if ((libsmbc->dh = smbc_opendir(h->filename)) < 0) {
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ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "Error opening dir: %s\n", strerror(errno));
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goto fail;
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}
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return 0;
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fail:
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libsmbc_close(h);
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return ret;
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}
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static int libsmbc_read_dir(URLContext *h, AVIODirEntry **next)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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AVIODirEntry *entry;
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struct smbc_dirent *dirent = NULL;
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char *url = NULL;
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int skip_entry;
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*next = entry = ff_alloc_dir_entry();
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if (!entry)
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return AVERROR(ENOMEM);
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do {
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skip_entry = 0;
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dirent = smbc_readdir(libsmbc->dh);
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if (!dirent) {
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av_freep(next);
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return 0;
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}
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switch (dirent->smbc_type) {
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case SMBC_DIR:
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entry->type = AVIO_ENTRY_DIRECTORY;
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break;
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case SMBC_FILE:
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entry->type = AVIO_ENTRY_FILE;
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break;
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case SMBC_FILE_SHARE:
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entry->type = AVIO_ENTRY_SHARE;
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break;
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case SMBC_SERVER:
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entry->type = AVIO_ENTRY_SERVER;
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break;
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case SMBC_WORKGROUP:
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entry->type = AVIO_ENTRY_WORKGROUP;
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break;
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case SMBC_COMMS_SHARE:
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case SMBC_IPC_SHARE:
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case SMBC_PRINTER_SHARE:
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skip_entry = 1;
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break;
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case SMBC_LINK:
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default:
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entry->type = AVIO_ENTRY_UNKNOWN;
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break;
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}
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} while (skip_entry || !strcmp(dirent->name, ".") ||
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!strcmp(dirent->name, ".."));
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entry->name = av_strdup(dirent->name);
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if (!entry->name) {
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av_freep(next);
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return AVERROR(ENOMEM);
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}
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url = av_append_path_component(h->filename, dirent->name);
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if (url) {
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struct stat st;
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if (!smbc_stat(url, &st)) {
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entry->group_id = st.st_gid;
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entry->user_id = st.st_uid;
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entry->size = st.st_size;
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entry->filemode = st.st_mode & 0777;
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entry->modification_timestamp = INT64_C(1000000) * st.st_mtime;
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entry->access_timestamp = INT64_C(1000000) * st.st_atime;
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entry->status_change_timestamp = INT64_C(1000000) * st.st_ctime;
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}
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av_free(url);
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}
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return 0;
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}
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static int libsmbc_close_dir(URLContext *h)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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if (libsmbc->dh >= 0) {
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smbc_closedir(libsmbc->dh);
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libsmbc->dh = -1;
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}
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libsmbc_close(h);
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return 0;
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}
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static int libsmbc_delete(URLContext *h)
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{
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LIBSMBContext *libsmbc = h->priv_data;
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int ret;
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struct stat st;
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if ((ret = libsmbc_connect(h)) < 0)
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goto cleanup;
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if ((libsmbc->fd = smbc_open(h->filename, O_WRONLY, 0666)) < 0) {
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ret = AVERROR(errno);
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goto cleanup;
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}
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if (smbc_fstat(libsmbc->fd, &st) < 0) {
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ret = AVERROR(errno);
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goto cleanup;
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}
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smbc_close(libsmbc->fd);
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libsmbc->fd = -1;
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if (S_ISDIR(st.st_mode)) {
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if (smbc_rmdir(h->filename) < 0) {
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ret = AVERROR(errno);
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goto cleanup;
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}
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} else {
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if (smbc_unlink(h->filename) < 0) {
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ret = AVERROR(errno);
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goto cleanup;
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}
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}
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ret = 0;
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cleanup:
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libsmbc_close(h);
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return ret;
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}
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static int libsmbc_move(URLContext *h_src, URLContext *h_dst)
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{
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LIBSMBContext *libsmbc = h_src->priv_data;
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int ret;
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if ((ret = libsmbc_connect(h_src)) < 0)
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goto cleanup;
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if ((libsmbc->dh = smbc_rename(h_src->filename, h_dst->filename)) < 0) {
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ret = AVERROR(errno);
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goto cleanup;
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}
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ret = 0;
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cleanup:
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libsmbc_close(h_src);
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return ret;
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}
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#define OFFSET(x) offsetof(LIBSMBContext, x)
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#define D AV_OPT_FLAG_DECODING_PARAM
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#define E AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{"timeout", "set timeout in ms of socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
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{"truncate", "truncate existing files on write", OFFSET(trunc), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
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{"workgroup", "set the workgroup used for making connections", OFFSET(workgroup), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
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{NULL}
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};
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|
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static const AVClass libsmbclient_context_class = {
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.class_name = "libsmbc",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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|
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const URLProtocol ff_libsmbclient_protocol = {
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|
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.name = "smb",
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|
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.url_open = libsmbc_open,
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|
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.url_read = libsmbc_read,
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|
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.url_write = libsmbc_write,
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|
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.url_seek = libsmbc_seek,
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|
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.url_close = libsmbc_close,
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|
|
.url_delete = libsmbc_delete,
|
||
|
|
.url_move = libsmbc_move,
|
||
|
|
.url_open_dir = libsmbc_open_dir,
|
||
|
|
.url_read_dir = libsmbc_read_dir,
|
||
|
|
.url_close_dir = libsmbc_close_dir,
|
||
|
|
.priv_data_size = sizeof(LIBSMBContext),
|
||
|
|
.priv_data_class = &libsmbclient_context_class,
|
||
|
|
.flags = URL_PROTOCOL_FLAG_NETWORK,
|
||
|
|
};
|