mirror of
https://github.com/FFmpeg/FFmpeg.git
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df07a833f1
Both strtoll and atoll have different names on MSVC, and strtoll has a compatibility layer in place for this case. Fixes compilation on MSVC. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
660 lines
19 KiB
C
660 lines
19 KiB
C
/*
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* Copyright (c) 2013 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 <stdlib.h>
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#include "libavutil/avstring.h"
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#include "libavutil/avassert.h"
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#include "avformat.h"
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#include "internal.h"
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#include "network.h"
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#include "os_support.h"
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#include "url.h"
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#include "libavutil/opt.h"
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#define CONTROL_BUFFER_SIZE 1024
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typedef enum {
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UNKNOWN,
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READY,
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DOWNLOADING,
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UPLOADING,
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DISCONNECTED
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} FTPState;
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typedef struct {
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const AVClass *class;
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URLContext *conn_control; /**< Control connection */
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int conn_control_block_flag; /**< Controls block/unblock mode of data connection */
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AVIOInterruptCB conn_control_interrupt_cb; /**< Controls block/unblock mode of data connection */
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URLContext *conn_data; /**< Data connection, NULL when not connected */
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uint8_t control_buffer[CONTROL_BUFFER_SIZE], *control_buf_ptr, *control_buf_end; /**< Control connection buffer */
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int server_data_port; /**< Data connection port opened by server, -1 on error. */
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char hostname[512]; /**< Server address. */
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char path[MAX_URL_SIZE]; /**< Path to resource on server. */
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int64_t filesize; /**< Size of file on server, -1 on error. */
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int64_t position; /**< Current position, calculated. */
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int rw_timeout; /**< Network timeout. */
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const char *anonymous_password; /**< Password to be used for anonymous user. An email should be used. */
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int write_seekable; /**< Control seekability, 0 = disable, 1 = enable. */
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FTPState state; /**< State of data connection */
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} FTPContext;
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#define OFFSET(x) offsetof(FTPContext, 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 of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
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{"ftp-write-seekable", "control seekability of connection during encoding", OFFSET(write_seekable), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E },
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{"ftp-anonymous-password", "password for anonynous login. E-mail address should be used.", OFFSET(anonymous_password), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
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{NULL}
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};
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static const AVClass ftp_context_class = {
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.class_name = "ftp",
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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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static int ftp_conn_control_block_control(void *data)
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{
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FTPContext *s = data;
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return s->conn_control_block_flag;
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}
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static int ftp_getc(FTPContext *s)
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{
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int len;
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if (s->control_buf_ptr >= s->control_buf_end) {
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if (s->conn_control_block_flag)
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return AVERROR_EXIT;
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len = ffurl_read(s->conn_control, s->control_buffer, CONTROL_BUFFER_SIZE);
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if (len < 0) {
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return len;
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} else if (!len) {
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return -1;
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} else {
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s->control_buf_ptr = s->control_buffer;
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s->control_buf_end = s->control_buffer + len;
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}
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}
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return *s->control_buf_ptr++;
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}
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static int ftp_get_line(FTPContext *s, char *line, int line_size)
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{
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int ch;
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char *q = line;
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int ori_block_flag = s->conn_control_block_flag;
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for (;;) {
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ch = ftp_getc(s);
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if (ch < 0) {
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s->conn_control_block_flag = ori_block_flag;
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return ch;
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}
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if (ch == '\n') {
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/* process line */
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if (q > line && q[-1] == '\r')
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q--;
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*q = '\0';
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s->conn_control_block_flag = ori_block_flag;
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return 0;
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} else {
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s->conn_control_block_flag = 0; /* line need to be finished */
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if ((q - line) < line_size - 1)
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*q++ = ch;
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}
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}
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}
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/*
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* This routine returns ftp server response code.
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* Server may send more than one response for a certain command, following priorites are used:
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* - 5xx code is returned if occurred. (means error)
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* - When pref_code is set then pref_code is return if occurred. (expected result)
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* - The lowest code is returned. (means success)
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*/
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static int ftp_status(FTPContext *s, int *major, int *minor, int *extra, char **line, int pref_code)
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{
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int err, result = -1, pref_code_found = 0;
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char buf[CONTROL_BUFFER_SIZE];
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unsigned char d_major, d_minor, d_extra;
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/* Set blocking mode */
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s->conn_control_block_flag = 0;
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for (;;) {
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if ((err = ftp_get_line(s, buf, CONTROL_BUFFER_SIZE)) < 0) {
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if (err == AVERROR_EXIT)
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return result;
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return err;
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}
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if (strlen(buf) < 3)
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continue;
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d_major = buf[0];
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if (d_major < '1' || d_major > '6' || d_major == '4')
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continue;
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d_minor = buf[1];
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if (d_minor < '0' || d_minor > '9')
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continue;
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d_extra = buf[2];
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if (d_extra < '0' || d_extra > '9')
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continue;
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av_log(s, AV_LOG_DEBUG, "%s\n", buf);
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err = d_major * 100 + d_minor * 10 + d_extra - 111 * '0';
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if ((result < 0 || err < result || pref_code == err) && !pref_code_found || d_major == '5') {
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if (pref_code == err || d_major == '5')
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pref_code_found = 1;
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result = err;
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if (major)
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*major = d_major - '0';
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if (minor)
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*minor = d_minor - '0';
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if (extra)
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*extra = d_extra - '0';
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if (line)
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*line = av_strdup(buf);
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}
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/* first code received. Now get all lines in non blocking mode */
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if (pref_code < 0 || pref_code_found)
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s->conn_control_block_flag = 1;
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}
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return result;
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}
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static int ftp_auth(FTPContext *s, char *auth)
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{
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const char *user = NULL, *pass = NULL;
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char *end = NULL, buf[CONTROL_BUFFER_SIZE];
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int err;
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av_assert2(auth);
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user = av_strtok(auth, ":", &end);
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pass = av_strtok(end, ":", &end);
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if (user) {
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snprintf(buf, sizeof(buf), "USER %s\r\n", user);
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if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
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return err;
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ftp_status(s, &err, NULL, NULL, NULL, -1);
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if (err == 3) {
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if (pass) {
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snprintf(buf, sizeof(buf), "PASS %s\r\n", pass);
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if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
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return err;
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ftp_status(s, &err, NULL, NULL, NULL, -1);
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} else
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return AVERROR(EACCES);
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}
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if (err != 2) {
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return AVERROR(EACCES);
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}
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} else {
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const char* command = "USER anonymous\r\n";
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if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
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return err;
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ftp_status(s, &err, NULL, NULL, NULL, -1);
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if (err == 3) {
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if (s->anonymous_password) {
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snprintf(buf, sizeof(buf), "PASS %s\r\n", s->anonymous_password);
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} else
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snprintf(buf, sizeof(buf), "PASS nopassword\r\n");
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if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
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return err;
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ftp_status(s, &err, NULL, NULL, NULL, -1);
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}
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if (err != 2) {
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return AVERROR(EACCES);
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}
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}
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return 0;
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}
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static int ftp_passive_mode(FTPContext *s)
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{
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char *res = NULL, *start, *end;
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int err, i;
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const char *command = "PASV\r\n";
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if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
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return err;
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if (ftp_status(s, NULL, NULL, NULL, &res, 227) != 227)
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goto fail;
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start = NULL;
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for (i = 0; i < strlen(res); ++i) {
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if (res[i] == '(') {
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start = res + i + 1;
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} else if (res[i] == ')') {
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end = res + i;
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break;
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}
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}
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if (!start || !end)
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goto fail;
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*end = '\0';
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/* skip ip */
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if (!av_strtok(start, ",", &end)) goto fail;
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if (!av_strtok(end, ",", &end)) goto fail;
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if (!av_strtok(end, ",", &end)) goto fail;
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if (!av_strtok(end, ",", &end)) goto fail;
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/* parse port number */
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start = av_strtok(end, ",", &end);
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if (!start) goto fail;
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s->server_data_port = atoi(start) * 256;
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start = av_strtok(end, ",", &end);
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if (!start) goto fail;
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s->server_data_port += atoi(start);
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av_dlog(s, "Server data port: %d\n", s->server_data_port);
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av_free(res);
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return 0;
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fail:
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av_free(res);
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s->server_data_port = -1;
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return AVERROR(EIO);
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}
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static int ftp_current_dir(FTPContext *s)
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{
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char *res = NULL, *start = NULL, *end = NULL;
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int err, i;
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const char *command = "PWD\r\n";
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if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
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return err;
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if (ftp_status(s, NULL, NULL, NULL, &res, 257) != 257)
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goto fail;
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for (i = 0; res[i]; ++i) {
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if (res[i] == '"') {
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if (!start) {
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start = res + i + 1;
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continue;
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}
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end = res + i;
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break;
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}
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}
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if (!end)
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goto fail;
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if (end > res && end[-1] == '/') {
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end[-1] = '\0';
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} else
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*end = '\0';
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av_strlcpy(s->path, start, sizeof(s->path));
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av_free(res);
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return 0;
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fail:
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av_free(res);
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return AVERROR(EIO);
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}
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static int ftp_file_size(FTPContext *s)
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{
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char buf[CONTROL_BUFFER_SIZE];
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int err;
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char *res = NULL;
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snprintf(buf, sizeof(buf), "SIZE %s\r\n", s->path);
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if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
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return err;
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if (ftp_status(s, NULL, NULL, NULL, &res, 213) == 213) {
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s->filesize = strtoll(&res[4], NULL, 10);
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} else {
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s->filesize = -1;
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av_free(res);
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return AVERROR(EIO);
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}
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av_free(res);
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return 0;
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}
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static int ftp_retrieve(FTPContext *s)
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{
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char buf[CONTROL_BUFFER_SIZE];
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int err;
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snprintf(buf, sizeof(buf), "RETR %s\r\n", s->path);
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if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
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return err;
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if (ftp_status(s, NULL, NULL, NULL, NULL, 150) != 150)
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return AVERROR(EIO);
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s->state = DOWNLOADING;
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return 0;
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}
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static int ftp_store(FTPContext *s)
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{
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char buf[CONTROL_BUFFER_SIZE];
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int err;
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snprintf(buf, sizeof(buf), "STOR %s\r\n", s->path);
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if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
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return err;
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if (ftp_status(s, NULL, NULL, NULL, NULL, 150) != 150)
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return AVERROR(EIO);
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s->state = UPLOADING;
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return 0;
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}
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static int ftp_send_command(FTPContext *s, const char* command)
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{
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int err;
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if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
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return err;
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ftp_status(s, &err, NULL, NULL, NULL, -1);
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if (err != 2)
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return AVERROR(EIO);
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return 0;
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}
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static int ftp_reconnect_data_connection(URLContext *h)
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{
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int err;
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char buf[CONTROL_BUFFER_SIZE], opts_format[20];
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AVDictionary *opts = NULL;
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FTPContext *s = h->priv_data;
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if (!s->conn_data) {
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ff_url_join(buf, sizeof(buf), "tcp", NULL, s->hostname, s->server_data_port, NULL);
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if (s->rw_timeout != -1) {
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snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
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av_dict_set(&opts, "timeout", opts_format, 0);
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} /* if option is not given, don't pass it and let tcp use its own default */
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err = ffurl_open(&s->conn_data, buf, AVIO_FLAG_READ_WRITE,
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&h->interrupt_callback, &opts);
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av_dict_free(&opts);
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if (err < 0)
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return err;
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}
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s->state = READY;
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s->position = 0;
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return 0;
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}
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static int ftp_open(URLContext *h, const char *url, int flags)
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{
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char proto[10], auth[1024], path[MAX_URL_SIZE], buf[CONTROL_BUFFER_SIZE], opts_format[20];
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AVDictionary *opts = NULL;
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int port, err;
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FTPContext *s = h->priv_data;
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av_dlog(h, "ftp protocol open\n");
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s->state = DISCONNECTED;
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s->filesize = -1;
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s->conn_control_interrupt_cb.opaque = s;
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s->conn_control_interrupt_cb.callback = ftp_conn_control_block_control;
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av_url_split(proto, sizeof(proto),
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auth, sizeof(auth),
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s->hostname, sizeof(s->hostname),
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&port,
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path, sizeof(path),
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url);
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if (port < 0)
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port = 21;
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if (!s->conn_control) {
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ff_url_join(buf, sizeof(buf), "tcp", NULL, s->hostname, port, NULL);
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if (s->rw_timeout != -1) {
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snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
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av_dict_set(&opts, "timeout", opts_format, 0);
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} /* if option is not given, don't pass it and let tcp use its own default */
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err = ffurl_open(&s->conn_control, buf, AVIO_FLAG_READ_WRITE,
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&s->conn_control_interrupt_cb, &opts);
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av_dict_free(&opts);
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if (err < 0)
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goto fail;
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/* consume all messages from server */
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if (ftp_status(s, NULL, NULL, NULL, NULL, 220) != 220) {
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av_log(h, AV_LOG_ERROR, "Server not ready for new users\n");
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err = AVERROR(EACCES);
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goto fail;
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}
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if ((err = ftp_auth(s, auth)) < 0)
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goto fail;
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if ((err = ftp_send_command(s, "TYPE I\r\n")) < 0)
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goto fail;
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if ((err = ftp_current_dir(s)) < 0)
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goto fail;
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av_strlcat(s->path, path, sizeof(s->path));
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if ((err = ftp_passive_mode(s)) < 0)
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goto fail;
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if (ftp_file_size(s) < 0 && flags & AVIO_FLAG_READ)
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h->is_streamed = 1;
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if (s->write_seekable != 1 && flags & AVIO_FLAG_WRITE)
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h->is_streamed = 1;
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}
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if ((err = ftp_reconnect_data_connection(h)) < 0)
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goto fail;
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return 0;
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fail:
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av_log(h, AV_LOG_ERROR, "FTP open failed\n");
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ffurl_closep(&s->conn_control);
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ffurl_closep(&s->conn_data);
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return err;
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}
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static int ftp_read(URLContext *h, unsigned char *buf, int size)
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{
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FTPContext *s = h->priv_data;
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int read;
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av_dlog(h, "ftp protocol read %d bytes\n", size);
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if (s->state == READY) {
|
|
ftp_retrieve(s);
|
|
}
|
|
if (s->conn_data && s->state == DOWNLOADING) {
|
|
read = ffurl_read(s->conn_data, buf, size);
|
|
if (read >= 0) {
|
|
s->position += read;
|
|
if (s->position >= s->filesize) {
|
|
ffurl_closep(&s->conn_data);
|
|
s->state = DISCONNECTED;
|
|
if (ftp_status(s, NULL, NULL, NULL,NULL, 226) != 226)
|
|
return AVERROR(EIO);
|
|
}
|
|
}
|
|
return read;
|
|
}
|
|
|
|
av_log(h, AV_LOG_DEBUG, "FTP read failed\n");
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
static int ftp_write(URLContext *h, const unsigned char *buf, int size)
|
|
{
|
|
FTPContext *s = h->priv_data;
|
|
int written;
|
|
|
|
av_dlog(h, "ftp protocol write %d bytes\n", size);
|
|
|
|
if (s->state == READY) {
|
|
ftp_store(s);
|
|
}
|
|
if (s->conn_data && s->state == UPLOADING) {
|
|
written = ffurl_write(s->conn_data, buf, size);
|
|
if (written > 0) {
|
|
s->position += written;
|
|
s->filesize = FFMAX(s->filesize, s->position);
|
|
}
|
|
return written;
|
|
}
|
|
|
|
av_log(h, AV_LOG_ERROR, "FTP write failed\n");
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
static int64_t ftp_seek(URLContext *h, int64_t pos, int whence)
|
|
{
|
|
FTPContext *s = h->priv_data;
|
|
char buf[CONTROL_BUFFER_SIZE];
|
|
int err;
|
|
int64_t new_pos;
|
|
|
|
av_dlog(h, "ftp protocol seek %"PRId64" %d\n", pos, whence);
|
|
|
|
switch(whence) {
|
|
case AVSEEK_SIZE:
|
|
return s->filesize;
|
|
case SEEK_SET:
|
|
new_pos = pos;
|
|
break;
|
|
case SEEK_CUR:
|
|
new_pos = s->position + pos;
|
|
break;
|
|
case SEEK_END:
|
|
if (s->filesize < 0)
|
|
return AVERROR(EIO);
|
|
new_pos = s->filesize + pos;
|
|
break;
|
|
default:
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (h->is_streamed)
|
|
return AVERROR(EIO);
|
|
|
|
if (new_pos < 0 || (s->filesize >= 0 && new_pos > s->filesize))
|
|
return AVERROR(EINVAL);
|
|
|
|
if (new_pos != s->position) {
|
|
/* close existing data connection */
|
|
if (s->state != READY) {
|
|
if (s->conn_data) {
|
|
/* abort existing transfer */
|
|
if (s->state == DOWNLOADING) {
|
|
snprintf(buf, sizeof(buf), "ABOR\r\n");
|
|
if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
|
|
return err;
|
|
}
|
|
ffurl_closep(&s->conn_data);
|
|
s->state = DISCONNECTED;
|
|
/* Servers return 225 or 226 */
|
|
ftp_status(s, &err, NULL, NULL, NULL, -1);
|
|
if (err != 2)
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
/* set passive */
|
|
if ((err = ftp_passive_mode(s)) < 0)
|
|
return err;
|
|
|
|
/* open new data connection */
|
|
if ((err = ftp_reconnect_data_connection(h)) < 0)
|
|
return err;
|
|
}
|
|
|
|
/* resume from pos position */
|
|
snprintf(buf, sizeof(buf), "REST %"PRId64"\r\n", pos);
|
|
if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
|
|
return err;
|
|
if (ftp_status(s, NULL, NULL, NULL, NULL, 350) != 350)
|
|
return AVERROR(EIO);
|
|
|
|
s->position = pos;
|
|
}
|
|
return new_pos;
|
|
}
|
|
|
|
static int ftp_close(URLContext *h)
|
|
{
|
|
FTPContext *s = h->priv_data;
|
|
|
|
av_dlog(h, "ftp protocol close\n");
|
|
|
|
ffurl_closep(&s->conn_control);
|
|
ffurl_closep(&s->conn_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ftp_get_file_handle(URLContext *h)
|
|
{
|
|
FTPContext *s = h->priv_data;
|
|
|
|
av_dlog(h, "ftp protocol get_file_handle\n");
|
|
|
|
if (s->conn_data)
|
|
return ffurl_get_file_handle(s->conn_data);
|
|
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
static int ftp_shutdown(URLContext *h, int flags)
|
|
{
|
|
FTPContext *s = h->priv_data;
|
|
|
|
av_dlog(h, "ftp protocol shutdown\n");
|
|
|
|
if (s->conn_data)
|
|
return ffurl_shutdown(s->conn_data, flags);
|
|
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
URLProtocol ff_ftp_protocol = {
|
|
.name = "ftp",
|
|
.url_open = ftp_open,
|
|
.url_read = ftp_read,
|
|
.url_write = ftp_write,
|
|
.url_seek = ftp_seek,
|
|
.url_close = ftp_close,
|
|
.url_get_file_handle = ftp_get_file_handle,
|
|
.url_shutdown = ftp_shutdown,
|
|
.priv_data_size = sizeof(FTPContext),
|
|
.priv_data_class = &ftp_context_class,
|
|
.flags = URL_PROTOCOL_FLAG_NETWORK,
|
|
};
|