| 0,0 → 1,229 |
|---|
| /* |
| * Copyright (c) 2013 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 <fcntl.h> |
| #include <libssh/sftp.h> |
| #include "libavutil/avstring.h" |
| #include "libavutil/opt.h" |
| #include "avformat.h" |
| #include "internal.h" |
| #include "url.h" |
| |
| typedef struct { |
| const AVClass *class; |
| ssh_session session; |
| sftp_session sftp; |
| sftp_file file; |
| int64_t filesize; |
| int rw_timeout; |
| int trunc; |
| } LIBSSHContext; |
| |
| static int libssh_close(URLContext *h) |
| { |
| LIBSSHContext *s = h->priv_data; |
| if (s->file) |
| sftp_close(s->file); |
| if (s->sftp) |
| sftp_free(s->sftp); |
| if (s->session) { |
| ssh_disconnect(s->session); |
| ssh_free(s->session); |
| } |
| return 0; |
| } |
| |
| static int libssh_open(URLContext *h, const char *url, int flags) |
| { |
| static const int verbosity = SSH_LOG_NOLOG; |
| LIBSSHContext *s = h->priv_data; |
| char proto[10], path[MAX_URL_SIZE], hostname[1024], credencials[1024]; |
| int port = 22, access, ret; |
| long timeout = s->rw_timeout * 1000; |
| const char *user = NULL, *pass = NULL; |
| char *end = NULL; |
| sftp_attributes stat; |
| |
| av_url_split(proto, sizeof(proto), |
| credencials, sizeof(credencials), |
| hostname, sizeof(hostname), |
| &port, |
| path, sizeof(path), |
| url); |
| |
| if (port <= 0 || port > 65535) |
| port = 22; |
| |
| if (!(s->session = ssh_new())) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| user = av_strtok(credencials, ":", &end); |
| pass = av_strtok(end, ":", &end); |
| ssh_options_set(s->session, SSH_OPTIONS_HOST, hostname); |
| ssh_options_set(s->session, SSH_OPTIONS_PORT, &port); |
| ssh_options_set(s->session, SSH_OPTIONS_LOG_VERBOSITY, &verbosity); |
| if (timeout > 0) |
| ssh_options_set(s->session, SSH_OPTIONS_TIMEOUT_USEC, &timeout); |
| if (user) |
| ssh_options_set(s->session, SSH_OPTIONS_USER, user); |
| |
| if (ssh_connect(s->session) != SSH_OK) { |
| av_log(h, AV_LOG_ERROR, "Connection failed. %s\n", ssh_get_error(s->session)); |
| ret = AVERROR(EIO); |
| goto fail; |
| } |
| |
| if (pass && ssh_userauth_password(s->session, NULL, pass) != SSH_AUTH_SUCCESS) { |
| av_log(h, AV_LOG_ERROR, "Error authenticating with password: %s\n", ssh_get_error(s->session)); |
| ret = AVERROR(EACCES); |
| goto fail; |
| } |
| |
| if (!(s->sftp = sftp_new(s->session))) { |
| av_log(h, AV_LOG_ERROR, "SFTP session creation failed: %s\n", ssh_get_error(s->session)); |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| if (sftp_init(s->sftp) != SSH_OK) { |
| av_log(h, AV_LOG_ERROR, "Error initializing sftp session: %s\n", ssh_get_error(s->session)); |
| ret = AVERROR(EIO); |
| goto fail; |
| } |
| |
| if ((flags & AVIO_FLAG_WRITE) && (flags & AVIO_FLAG_READ)) { |
| access = O_CREAT | O_RDWR; |
| if (s->trunc) |
| access |= O_TRUNC; |
| } else if (flags & AVIO_FLAG_WRITE) { |
| access = O_CREAT | O_WRONLY; |
| if (s->trunc) |
| access |= O_TRUNC; |
| } else { |
| access = O_RDONLY; |
| } |
| |
| if (!(s->file = sftp_open(s->sftp, path, access, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH))) { |
| av_log(h, AV_LOG_ERROR, "Error opening sftp file: %s\n", ssh_get_error(s->session)); |
| ret = AVERROR(EIO); |
| goto fail; |
| } |
| |
| if (!(stat = sftp_fstat(s->file))) { |
| av_log(h, AV_LOG_WARNING, "Cannot stat remote file %s.\n", path); |
| s->filesize = -1; |
| } else { |
| s->filesize = stat->size; |
| sftp_attributes_free(stat); |
| } |
| |
| return 0; |
| |
| fail: |
| libssh_close(h); |
| return ret; |
| } |
| |
| static int64_t libssh_seek(URLContext *h, int64_t pos, int whence) |
| { |
| LIBSSHContext *s = h->priv_data; |
| int64_t newpos; |
| |
| if (s->filesize == -1 && (whence == AVSEEK_SIZE || whence == SEEK_END)) { |
| av_log(h, AV_LOG_ERROR, "Error during seeking.\n"); |
| return AVERROR(EIO); |
| } |
| |
| switch(whence) { |
| case AVSEEK_SIZE: |
| return s->filesize; |
| case SEEK_SET: |
| newpos = pos; |
| break; |
| case SEEK_CUR: |
| newpos = sftp_tell64(s->file); |
| break; |
| case SEEK_END: |
| newpos = s->filesize + pos; |
| break; |
| default: |
| return AVERROR(EINVAL); |
| } |
| |
| if (sftp_seek64(s->file, newpos)) { |
| av_log(h, AV_LOG_ERROR, "Error during seeking.\n"); |
| return AVERROR(EIO); |
| } |
| |
| return newpos; |
| } |
| |
| static int libssh_read(URLContext *h, unsigned char *buf, int size) |
| { |
| LIBSSHContext *s = h->priv_data; |
| int bytes_read; |
| |
| if ((bytes_read = sftp_read(s->file, buf, size)) < 0) { |
| av_log(h, AV_LOG_ERROR, "Read error.\n"); |
| return AVERROR(EIO); |
| } |
| return bytes_read; |
| } |
| |
| static int libssh_write(URLContext *h, const unsigned char *buf, int size) |
| { |
| LIBSSHContext *s = h->priv_data; |
| int bytes_written; |
| |
| if ((bytes_written = sftp_write(s->file, buf, size)) < 0) { |
| av_log(h, AV_LOG_ERROR, "Write error.\n"); |
| return AVERROR(EIO); |
| } |
| return bytes_written; |
| } |
| |
| #define OFFSET(x) offsetof(LIBSSHContext, x) |
| #define D AV_OPT_FLAG_DECODING_PARAM |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| {"timeout", "set timeout of socket I/O operations", OFFSET(rw_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 }, |
| {NULL} |
| }; |
| |
| static const AVClass libssh_context_class = { |
| .class_name = "libssh", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| URLProtocol ff_libssh_protocol = { |
| .name = "sftp", |
| .url_open = libssh_open, |
| .url_read = libssh_read, |
| .url_write = libssh_write, |
| .url_seek = libssh_seek, |
| .url_close = libssh_close, |
| .priv_data_size = sizeof(LIBSSHContext), |
| .priv_data_class = &libssh_context_class, |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| }; |