diff options
Diffstat (limited to 'libavformat/libsmbclient.c')
| -rw-r--r-- | libavformat/libsmbclient.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/libavformat/libsmbclient.c b/libavformat/libsmbclient.c new file mode 100644 index 0000000..8290d75 --- /dev/null +++ b/libavformat/libsmbclient.c @@ -0,0 +1,212 @@ +/* + * Copyright (c) 2014 Lukasz Marek <lukasz.m.luki@gmail.com> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <libsmbclient.h> +#include "libavutil/avstring.h" +#include "libavutil/opt.h" +#include "avformat.h" +#include "internal.h" +#include "url.h" + +typedef struct { + const AVClass *class; + SMBCCTX *ctx; + int fd; + int64_t filesize; + int trunc; + int timeout; + char *workgroup; +} LIBSMBContext; + +static void libsmbc_get_auth_data(SMBCCTX *c, const char *server, const char *share, + char *workgroup, int workgroup_len, + char *username, int username_len, + char *password, int password_len) +{ + /* Do nothing yet. Credentials are passed via url. + * Callback must exists, there might be a segmentation fault otherwise. */ +} + +static av_cold int libsmbc_connect(URLContext *h) +{ + LIBSMBContext *libsmbc = h->priv_data; + + libsmbc->ctx = smbc_new_context(); + if (!libsmbc->ctx) { + int ret = AVERROR(errno); + av_log(h, AV_LOG_ERROR, "Cannot create context: %s.\n", strerror(errno)); + return ret; + } + if (!smbc_init_context(libsmbc->ctx)) { + int ret = AVERROR(errno); + av_log(h, AV_LOG_ERROR, "Cannot initialize context: %s.\n", strerror(errno)); + return ret; + } + smbc_set_context(libsmbc->ctx); + + smbc_setOptionUserData(libsmbc->ctx, h); + smbc_setFunctionAuthDataWithContext(libsmbc->ctx, libsmbc_get_auth_data); + + if (libsmbc->timeout != -1) + smbc_setTimeout(libsmbc->ctx, libsmbc->timeout); + if (libsmbc->workgroup) + smbc_setWorkgroup(libsmbc->ctx, libsmbc->workgroup); + + if (smbc_init(NULL, 0) < 0) { + int ret = AVERROR(errno); + av_log(h, AV_LOG_ERROR, "Initialization failed: %s\n", strerror(errno)); + return ret; + } + return 0; +} + +static av_cold int libsmbc_close(URLContext *h) +{ + LIBSMBContext *libsmbc = h->priv_data; + if (libsmbc->fd >= 0) { + smbc_close(libsmbc->fd); + libsmbc->fd = -1; + } + if (libsmbc->ctx) { + smbc_free_context(libsmbc->ctx, 1); + libsmbc->ctx = NULL; + } + return 0; +} + +static av_cold int libsmbc_open(URLContext *h, const char *url, int flags) +{ + LIBSMBContext *libsmbc = h->priv_data; + int access, ret; + struct stat st; + + libsmbc->fd = -1; + libsmbc->filesize = -1; + + if ((ret = libsmbc_connect(h)) < 0) + goto fail; + + if ((flags & AVIO_FLAG_WRITE) && (flags & AVIO_FLAG_READ)) { + access = O_CREAT | O_RDWR; + if (libsmbc->trunc) + access |= O_TRUNC; + } else if (flags & AVIO_FLAG_WRITE) { + access = O_CREAT | O_WRONLY; + if (libsmbc->trunc) + access |= O_TRUNC; + } else + access = O_RDONLY; + + /* 0666 = -rw-rw-rw- = read+write for everyone, minus umask */ + if ((libsmbc->fd = smbc_open(url, access, 0666)) < 0) { + ret = AVERROR(errno); + av_log(h, AV_LOG_ERROR, "File open failed: %s\n", strerror(errno)); + goto fail; + } + + if (smbc_fstat(libsmbc->fd, &st) < 0) + av_log(h, AV_LOG_WARNING, "Cannot stat file: %s\n", strerror(errno)); + else + libsmbc->filesize = st.st_size; + + return 0; + fail: + libsmbc_close(h); + return ret; +} + +static int64_t libsmbc_seek(URLContext *h, int64_t pos, int whence) +{ + LIBSMBContext *libsmbc = h->priv_data; + int64_t newpos; + + if (whence == AVSEEK_SIZE) { + if (libsmbc->filesize == -1) { + av_log(h, AV_LOG_ERROR, "Error during seeking: filesize is unknown.\n"); + return AVERROR(EIO); + } else + return libsmbc->filesize; + } + + if ((newpos = smbc_lseek(libsmbc->fd, pos, whence)) < 0) { + int err = errno; + av_log(h, AV_LOG_ERROR, "Error during seeking: %s\n", strerror(err)); + return AVERROR(err); + } + + return newpos; +} + +static int libsmbc_read(URLContext *h, unsigned char *buf, int size) +{ + LIBSMBContext *libsmbc = h->priv_data; + int bytes_read; + + if ((bytes_read = smbc_read(libsmbc->fd, buf, size)) < 0) { + int ret = AVERROR(errno); + av_log(h, AV_LOG_ERROR, "Read error: %s\n", strerror(errno)); + return ret; + } + + return bytes_read; +} + +static int libsmbc_write(URLContext *h, const unsigned char *buf, int size) +{ + LIBSMBContext *libsmbc = h->priv_data; + int bytes_written; + + if ((bytes_written = smbc_write(libsmbc->fd, buf, size)) < 0) { + int ret = AVERROR(errno); + av_log(h, AV_LOG_ERROR, "Write error: %s\n", strerror(errno)); + return ret; + } + + return bytes_written; +} + +#define OFFSET(x) offsetof(LIBSMBContext, x) +#define D AV_OPT_FLAG_DECODING_PARAM +#define E AV_OPT_FLAG_ENCODING_PARAM +static const AVOption options[] = { + {"timeout", "set timeout in ms of socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E }, + {"truncate", "truncate existing files on write", OFFSET(trunc), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E }, + {"workgroup", "set the workgroup used for making connections", OFFSET(workgroup), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E }, + {NULL} +}; + +static const AVClass libsmbclient_context_class = { + .class_name = "libsmbc", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +URLProtocol ff_libsmbclient_protocol = { + .name = "smb", + .url_open = libsmbc_open, + .url_read = libsmbc_read, + .url_write = libsmbc_write, + .url_seek = libsmbc_seek, + .url_close = libsmbc_close, + .priv_data_size = sizeof(LIBSMBContext), + .priv_data_class = &libsmbclient_context_class, + .flags = URL_PROTOCOL_FLAG_NETWORK, +}; |
