#include <stdlib.h>
#include "libavutil/avstring.h"
-#include "libavutil/avassert.h"
+#include "libavutil/time.h"
#include "avformat.h"
#include "internal.h"
#include "network.h"
#include "libavutil/opt.h"
#define CONTROL_BUFFER_SIZE 1024
+#define CREDENTIALS_BUFFER_SIZE 128
typedef enum {
UNKNOWN,
DISCONNECTED
} FTPState;
-
typedef struct {
const AVClass *class;
- URLContext *conn_control; /**< Control connection */
- int conn_control_block_flag; /**< Controls block/unblock mode of data connection */
- AVIOInterruptCB conn_control_interrupt_cb; /**< Controls block/unblock mode of data connection */
- URLContext *conn_data; /**< Data connection, NULL when not connected */
- uint8_t control_buffer[CONTROL_BUFFER_SIZE], *control_buf_ptr, *control_buf_end; /**< Control connection buffer */
- int server_data_port; /**< Data connection port opened by server, -1 on error. */
- char hostname[512]; /**< Server address. */
- char path[MAX_URL_SIZE]; /**< Path to resource on server. */
- int64_t filesize; /**< Size of file on server, -1 on error. */
- int64_t position; /**< Current position, calculated. */
- int rw_timeout; /**< Network timeout. */
- const char *anonymous_password; /**< Password to be used for anonymous user. An email should be used. */
- int write_seekable; /**< Control seekability, 0 = disable, 1 = enable. */
- FTPState state; /**< State of data connection */
+ URLContext *conn_control; /**< Control connection */
+ int conn_control_block_flag; /**< Controls block/unblock mode of data connection */
+ AVIOInterruptCB conn_control_interrupt_cb; /**< Controls block/unblock mode of data connection */
+ URLContext *conn_data; /**< Data connection, NULL when not connected */
+ uint8_t control_buffer[CONTROL_BUFFER_SIZE]; /**< Control connection buffer */
+ uint8_t *control_buf_ptr, *control_buf_end;
+ int server_data_port; /**< Data connection port opened by server, -1 on error. */
+ int server_control_port; /**< Control connection port, default is 21 */
+ char hostname[512]; /**< Server address. */
+ char credencials[CREDENTIALS_BUFFER_SIZE]; /**< Authentication data */
+ char path[MAX_URL_SIZE]; /**< Path to resource on server. */
+ int64_t filesize; /**< Size of file on server, -1 on error. */
+ int64_t position; /**< Current position, calculated. */
+ int rw_timeout; /**< Network timeout. */
+ const char *anonymous_password; /**< Password to be used for anonymous user. An email should be used. */
+ int write_seekable; /**< Control seekability, 0 = disable, 1 = enable. */
+ FTPState state; /**< State of data connection */
} FTPContext;
#define OFFSET(x) offsetof(FTPContext, x)
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 },
{"ftp-write-seekable", "control seekability of connection during encoding", OFFSET(write_seekable), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E },
- {"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 },
+ {"ftp-anonymous-password", "password for anonymous login. E-mail address should be used.", OFFSET(anonymous_password), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
{NULL}
};
}
}
+static int ftp_flush_control_input(FTPContext *s)
+{
+ char buf[CONTROL_BUFFER_SIZE];
+ int err, ori_block_flag = s->conn_control_block_flag;
+
+ s->conn_control_block_flag = 1;
+ do {
+ err = ftp_get_line(s, buf, sizeof(buf));
+ } while (!err);
+
+ s->conn_control_block_flag = ori_block_flag;
+
+ if (err < 0 && err != AVERROR_EXIT)
+ return err;
+
+ return 0;
+}
+
/*
* This routine returns ftp server response code.
- * Server may send more than one response for a certain command, following priorites are used:
- * - 5xx code is returned if occurred. (means error)
- * - When pref_code is set then pref_code is return if occurred. (expected result)
- * - The lowest code is returned. (means success)
+ * Server may send more than one response for a certain command, following priorities are used:
+ * - When pref_codes are set then pref_code is return if occurred. (expected result)
+ * - 0 is returned when no pref_codes or not occurred
*/
-static int ftp_status(FTPContext *s, int *major, int *minor, int *extra, char **line, int pref_code)
+static int ftp_status(FTPContext *s, char **line, const int response_codes[])
{
- int err, result = -1, pref_code_found = 0;
+ int err, i, result = 0, pref_code_found = 0, wait_count = 100;
char buf[CONTROL_BUFFER_SIZE];
- unsigned char d_major, d_minor, d_extra;
/* Set blocking mode */
s->conn_control_block_flag = 0;
for (;;) {
- if ((err = ftp_get_line(s, buf, CONTROL_BUFFER_SIZE)) < 0) {
- if (err == AVERROR_EXIT)
- return result;
- return err;
+ if ((err = ftp_get_line(s, buf, sizeof(buf))) < 0) {
+ if (err == AVERROR_EXIT) {
+ if (!pref_code_found && wait_count--) {
+ av_usleep(10000);
+ continue;
+ }
+ }
+ return result;
}
- if (strlen(buf) < 3)
- continue;
- d_major = buf[0];
- if (d_major < '1' || d_major > '6' || d_major == '4')
- continue;
- d_minor = buf[1];
- if (d_minor < '0' || d_minor > '9')
- continue;
- d_extra = buf[2];
- if (d_extra < '0' || d_extra > '9')
- continue;
-
av_log(s, AV_LOG_DEBUG, "%s\n", buf);
- err = d_major * 100 + d_minor * 10 + d_extra - 111 * '0';
-
- if ((result < 0 || err < result || pref_code == err) && !pref_code_found || d_major == '5') {
- if (pref_code == err || d_major == '5')
- pref_code_found = 1;
- result = err;
- if (major)
- *major = d_major - '0';
- if (minor)
- *minor = d_minor - '0';
- if (extra)
- *extra = d_extra - '0';
- if (line)
- *line = av_strdup(buf);
- }
+ if (!pref_code_found) {
+ if (strlen(buf) < 3)
+ continue;
- /* first code received. Now get all lines in non blocking mode */
- if (pref_code < 0 || pref_code_found)
- s->conn_control_block_flag = 1;
+ err = 0;
+ for (i = 0; i < 3; ++i) {
+ if (buf[i] < '0' || buf[i] > '9')
+ continue;
+ err *= 10;
+ err += buf[i] - '0';
+ }
+
+ for (i = 0; response_codes[i]; ++i) {
+ if (err == response_codes[i]) {
+ /* first code received. Now get all lines in non blocking mode */
+ s->conn_control_block_flag = 1;
+ pref_code_found = 1;
+ result = err;
+ if (line)
+ *line = av_strdup(buf);
+ break;
+ }
+ }
+ }
}
return result;
}
-static int ftp_auth(FTPContext *s, char *auth)
+static int ftp_send_command(FTPContext *s, const char *command,
+ const int response_codes[], char **response)
+{
+ int err;
+
+ /* Flush control connection input to get rid of non relevant responses if any */
+ if ((err = ftp_flush_control_input(s)) < 0)
+ return err;
+
+ /* send command in blocking mode */
+ s->conn_control_block_flag = 0;
+ if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
+ return err;
+ if (!err)
+ return -1;
+
+ /* return status */
+ if (response_codes) {
+ return ftp_status(s, response, response_codes);
+ }
+ return 0;
+}
+
+static void ftp_close_data_connection(FTPContext *s)
+{
+ ffurl_closep(&s->conn_data);
+ s->position = 0;
+ s->state = DISCONNECTED;
+}
+
+static void ftp_close_both_connections(FTPContext *s)
+{
+ ffurl_closep(&s->conn_control);
+ ftp_close_data_connection(s);
+}
+
+static int ftp_auth(FTPContext *s)
{
const char *user = NULL, *pass = NULL;
- char *end = NULL, buf[CONTROL_BUFFER_SIZE];
+ char *end = NULL, buf[CONTROL_BUFFER_SIZE], credencials[CREDENTIALS_BUFFER_SIZE];
int err;
- av_assert2(auth);
+ const int user_codes[] = {331, 230, 500, 530, 0}; /* 500, 530 are incorrect codes */
+ const int pass_codes[] = {230, 503, 530, 0}; /* 503, 530 are incorrect codes */
+
+ /* Authentication may be repeated, original string has to be saved */
+ av_strlcpy(credencials, s->credencials, sizeof(credencials));
- user = av_strtok(auth, ":", &end);
+ user = av_strtok(credencials, ":", &end);
pass = av_strtok(end, ":", &end);
- if (user) {
- snprintf(buf, sizeof(buf), "USER %s\r\n", user);
- if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
- return err;
- ftp_status(s, &err, NULL, NULL, NULL, -1);
- if (err == 3) {
- if (pass) {
- snprintf(buf, sizeof(buf), "PASS %s\r\n", pass);
- if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
- return err;
- ftp_status(s, &err, NULL, NULL, NULL, -1);
- } else
- return AVERROR(EACCES);
- }
- if (err != 2) {
- return AVERROR(EACCES);
- }
- } else {
- const char* command = "USER anonymous\r\n";
- if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
- return err;
- ftp_status(s, &err, NULL, NULL, NULL, -1);
- if (err == 3) {
- if (s->anonymous_password) {
- snprintf(buf, sizeof(buf), "PASS %s\r\n", s->anonymous_password);
- } else
- snprintf(buf, sizeof(buf), "PASS nopassword\r\n");
- if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
- return err;
- ftp_status(s, &err, NULL, NULL, NULL, -1);
- }
- if (err != 2) {
+ if (!user) {
+ user = "anonymous";
+ pass = s->anonymous_password ? s->anonymous_password : "nopassword";
+ }
+
+ snprintf(buf, sizeof(buf), "USER %s\r\n", user);
+ err = ftp_send_command(s, buf, user_codes, NULL);
+ if (err == 331) {
+ if (pass) {
+ snprintf(buf, sizeof(buf), "PASS %s\r\n", pass);
+ err = ftp_send_command(s, buf, pass_codes, NULL);
+ } else
return AVERROR(EACCES);
- }
}
+ if (err != 230)
+ return AVERROR(EACCES);
return 0;
}
static int ftp_passive_mode(FTPContext *s)
{
- char *res = NULL, *start, *end;
- int err, i;
+ char *res = NULL, *start = NULL, *end = NULL;
+ int i;
const char *command = "PASV\r\n";
+ const int pasv_codes[] = {227, 501, 0}; /* 501 is incorrect code */
- if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
- return err;
- if (ftp_status(s, NULL, NULL, NULL, &res, 227) != 227)
+ if (ftp_send_command(s, command, pasv_codes, &res) != 227 || !res)
goto fail;
- start = NULL;
- for (i = 0; i < strlen(res); ++i) {
+ for (i = 0; res[i]; ++i) {
if (res[i] == '(') {
start = res + i + 1;
} else if (res[i] == ')') {
static int ftp_current_dir(FTPContext *s)
{
char *res = NULL, *start = NULL, *end = NULL;
- int err, i;
+ int i;
const char *command = "PWD\r\n";
+ const int pwd_codes[] = {257, 0};
- if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
- return err;
- if (ftp_status(s, NULL, NULL, NULL, &res, 257) != 257)
+ if (ftp_send_command(s, command, pwd_codes, &res) != 257 || !res)
goto fail;
for (i = 0; res[i]; ++i) {
static int ftp_file_size(FTPContext *s)
{
- char buf[CONTROL_BUFFER_SIZE];
- int err;
+ char command[CONTROL_BUFFER_SIZE];
char *res = NULL;
+ const int size_codes[] = {213, 501, 550, 0}; /* 501, 550 are incorrect codes */
- snprintf(buf, sizeof(buf), "SIZE %s\r\n", s->path);
- if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
- return err;
- if (ftp_status(s, NULL, NULL, NULL, &res, 213) == 213) {
+ snprintf(command, sizeof(command), "SIZE %s\r\n", s->path);
+ if (ftp_send_command(s, command, size_codes, &res) == 213 && res) {
s->filesize = strtoll(&res[4], NULL, 10);
} else {
s->filesize = -1;
static int ftp_retrieve(FTPContext *s)
{
- char buf[CONTROL_BUFFER_SIZE];
- int err;
+ char command[CONTROL_BUFFER_SIZE];
+ const int retr_codes[] = {150, 550, 554, 0}; /* 550, 554 are incorrect codes */
- snprintf(buf, sizeof(buf), "RETR %s\r\n", s->path);
- if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
- return err;
- if (ftp_status(s, NULL, NULL, NULL, NULL, 150) != 150)
+ snprintf(command, sizeof(command), "RETR %s\r\n", s->path);
+ if (ftp_send_command(s, command, retr_codes, NULL) != 150)
return AVERROR(EIO);
s->state = DOWNLOADING;
static int ftp_store(FTPContext *s)
{
- char buf[CONTROL_BUFFER_SIZE];
- int err;
+ char command[CONTROL_BUFFER_SIZE];
+ const int stor_codes[] = {150, 0};
- snprintf(buf, sizeof(buf), "STOR %s\r\n", s->path);
- if ((err = ffurl_write(s->conn_control, buf, strlen(buf))) < 0)
- return err;
- if (ftp_status(s, NULL, NULL, NULL, NULL, 150) != 150)
+ snprintf(command, sizeof(command), "STOR %s\r\n", s->path);
+ if (ftp_send_command(s, command, stor_codes, NULL) != 150)
return AVERROR(EIO);
s->state = UPLOADING;
return 0;
}
-static int ftp_send_command(FTPContext *s, const char* command)
+static int ftp_type(FTPContext *s)
{
- int err;
+ const char *command = "TYPE I\r\n";
+ const int type_codes[] = {200, 500, 504, 0}; /* 500, 504 are incorrect codes */
- if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
- return err;
- ftp_status(s, &err, NULL, NULL, NULL, -1);
- if (err != 2)
+ if (ftp_send_command(s, command, type_codes, NULL) != 200)
return AVERROR(EIO);
return 0;
}
-static int ftp_reconnect_data_connection(URLContext *h)
+static int ftp_restart(FTPContext *s, int64_t pos)
+{
+ char command[CONTROL_BUFFER_SIZE];
+ const int rest_codes[] = {350, 500, 501, 0}; /* 500, 501 are incorrect codes */
+
+ snprintf(command, sizeof(command), "REST %"PRId64"\r\n", pos);
+ if (ftp_send_command(s, command, rest_codes, NULL) != 350)
+ return AVERROR(EIO);
+
+ return 0;
+}
+
+static int ftp_connect_control_connection(URLContext *h)
+{
+ char buf[CONTROL_BUFFER_SIZE], opts_format[20];
+ int err;
+ AVDictionary *opts = NULL;
+ FTPContext *s = h->priv_data;
+ const int connect_codes[] = {220, 0};
+
+ s->conn_control_block_flag = 0;
+
+ if (!s->conn_control) {
+ ff_url_join(buf, sizeof(buf), "tcp", NULL,
+ s->hostname, s->server_control_port, NULL);
+ if (s->rw_timeout != -1) {
+ snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
+ av_dict_set(&opts, "timeout", opts_format, 0);
+ } /* if option is not given, don't pass it and let tcp use its own default */
+ err = ffurl_open(&s->conn_control, buf, AVIO_FLAG_READ_WRITE,
+ &s->conn_control_interrupt_cb, &opts);
+ av_dict_free(&opts);
+ if (err < 0) {
+ av_log(h, AV_LOG_ERROR, "Cannot open control connection\n");
+ return err;
+ }
+
+ /* consume all messages from server */
+ if (ftp_status(s, NULL, connect_codes) != 220) {
+ av_log(h, AV_LOG_ERROR, "FTP server not ready for new users\n");
+ return AVERROR(EACCES);
+ }
+
+ if ((err = ftp_auth(s)) < 0) {
+ av_log(h, AV_LOG_ERROR, "FTP authentication failed\n");
+ return err;
+ }
+
+ if ((err = ftp_type(s)) < 0) {
+ av_dlog(h, "Set content type failed\n");
+ return err;
+ }
+ }
+ return 0;
+}
+
+static int ftp_connect_data_connection(URLContext *h)
{
int err;
char buf[CONTROL_BUFFER_SIZE], opts_format[20];
FTPContext *s = h->priv_data;
if (!s->conn_data) {
+ /* Enter passive mode */
+ if ((err = ftp_passive_mode(s)) < 0) {
+ av_dlog(h, "Set passive mode failed\n");
+ return err;
+ }
+ /* Open data connection */
ff_url_join(buf, sizeof(buf), "tcp", NULL, s->hostname, s->server_data_port, NULL);
if (s->rw_timeout != -1) {
snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
av_dict_free(&opts);
if (err < 0)
return err;
+
+ if (s->position)
+ if ((err = ftp_restart(s, s->position)) < 0)
+ return err;
}
s->state = READY;
- s->position = 0;
+ return 0;
+}
+
+static int ftp_abort(URLContext *h)
+{
+ const char *command = "ABOR\r\n";
+ int err;
+ const int abor_codes[] = {225, 226, 0};
+ FTPContext *s = h->priv_data;
+
+ /* According to RCF 959:
+ "ABOR command tells the server to abort the previous FTP
+ service command and any associated transfer of data."
+
+ There are FTP server implementations that don't response
+ to any commands during data transfer in passive mode (including ABOR).
+
+ This implementation closes data connection by force.
+ */
+
+ if (ftp_send_command(s, command, NULL, NULL) < 0) {
+ ftp_close_both_connections(s);
+ if ((err = ftp_connect_control_connection(h)) < 0) {
+ av_log(h, AV_LOG_ERROR, "Reconnect failed.\n");
+ return err;
+ }
+ } else {
+ ftp_close_data_connection(s);
+ }
+
+ if (ftp_status(s, NULL, abor_codes) < 225) {
+ /* wu-ftpd also closes control connection after data connection closing */
+ ffurl_closep(&s->conn_control);
+ if ((err = ftp_connect_control_connection(h)) < 0) {
+ av_log(h, AV_LOG_ERROR, "Reconnect failed.\n");
+ return err;
+ }
+ }
+
return 0;
}
static int ftp_open(URLContext *h, const char *url, int flags)
{
- char proto[10], auth[1024], path[MAX_URL_SIZE], buf[CONTROL_BUFFER_SIZE], opts_format[20];
- AVDictionary *opts = NULL;
- int port, err;
+ char proto[10], path[MAX_URL_SIZE];
+ int err;
FTPContext *s = h->priv_data;
av_dlog(h, "ftp protocol open\n");
s->state = DISCONNECTED;
s->filesize = -1;
+ s->position = 0;
s->conn_control_interrupt_cb.opaque = s;
s->conn_control_interrupt_cb.callback = ftp_conn_control_block_control;
av_url_split(proto, sizeof(proto),
- auth, sizeof(auth),
+ s->credencials, sizeof(s->credencials),
s->hostname, sizeof(s->hostname),
- &port,
+ &s->server_control_port,
path, sizeof(path),
url);
- if (port < 0)
- port = 21;
+ if (s->server_control_port < 0 || s->server_control_port > 65535)
+ s->server_control_port = 21;
- if (!s->conn_control) {
- ff_url_join(buf, sizeof(buf), "tcp", NULL, s->hostname, port, NULL);
- if (s->rw_timeout != -1) {
- snprintf(opts_format, sizeof(opts_format), "%d", s->rw_timeout);
- av_dict_set(&opts, "timeout", opts_format, 0);
- } /* if option is not given, don't pass it and let tcp use its own default */
- err = ffurl_open(&s->conn_control, buf, AVIO_FLAG_READ_WRITE,
- &s->conn_control_interrupt_cb, &opts);
- av_dict_free(&opts);
- if (err < 0)
- goto fail;
-
- /* consume all messages from server */
- if (ftp_status(s, NULL, NULL, NULL, NULL, 220) != 220) {
- av_log(h, AV_LOG_ERROR, "Server not ready for new users\n");
- err = AVERROR(EACCES);
- goto fail;
- }
-
- if ((err = ftp_auth(s, auth)) < 0)
- goto fail;
-
- if ((err = ftp_send_command(s, "TYPE I\r\n")) < 0)
- goto fail;
-
- if ((err = ftp_current_dir(s)) < 0)
- goto fail;
- av_strlcat(s->path, path, sizeof(s->path));
+ if ((err = ftp_connect_control_connection(h)) < 0)
+ goto fail;
- if ((err = ftp_passive_mode(s)) < 0)
- goto fail;
+ if ((err = ftp_current_dir(s)) < 0)
+ goto fail;
+ av_strlcat(s->path, path, sizeof(s->path));
+ if (ftp_restart(s, 0) < 0) {
+ h->is_streamed = 1;
+ } else {
if (ftp_file_size(s) < 0 && flags & AVIO_FLAG_READ)
h->is_streamed = 1;
if (s->write_seekable != 1 && flags & AVIO_FLAG_WRITE)
h->is_streamed = 1;
}
- if ((err = ftp_reconnect_data_connection(h)) < 0)
- goto fail;
-
return 0;
+
fail:
av_log(h, AV_LOG_ERROR, "FTP open failed\n");
ffurl_closep(&s->conn_control);
return err;
}
+static int64_t ftp_seek(URLContext *h, int64_t pos, int whence)
+{
+ FTPContext *s = h->priv_data;
+ int err;
+ int64_t new_pos, fake_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);
+
+ new_pos = FFMAX(0, new_pos);
+ fake_pos = s->filesize != -1 ? FFMIN(new_pos, s->filesize) : new_pos;
+
+ if (fake_pos != s->position) {
+ if ((err = ftp_abort(h)) < 0)
+ return err;
+ s->position = fake_pos;
+ }
+ return new_pos;
+}
+
static int ftp_read(URLContext *h, unsigned char *buf, int size)
{
FTPContext *s = h->priv_data;
- int read;
+ int read, err, retry_done = 0;
av_dlog(h, "ftp protocol read %d bytes\n", size);
-
+ retry:
+ if (s->state == DISCONNECTED) {
+ if (s->position >= s->filesize)
+ return 0;
+ if ((err = ftp_connect_data_connection(h)) < 0)
+ return err;
+ }
if (s->state == READY) {
- ftp_retrieve(s);
+ if (s->position >= s->filesize)
+ return 0;
+ if ((err = ftp_retrieve(s)) < 0)
+ return err;
}
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)
+ /* server will terminate, but keep current position to avoid madness */
+ int64_t pos = s->position;
+ if (ftp_abort(h) < 0) {
+ s->position = pos;
return AVERROR(EIO);
+ }
+ s->position = pos;
+ }
+ }
+ if (read <= 0 && s->position < s->filesize && !h->is_streamed) {
+ /* Server closed connection. Probably due to inactivity */
+ int64_t pos = s->position;
+ av_log(h, AV_LOG_INFO, "Reconnect to FTP server.\n");
+ if ((err = ftp_abort(h)) < 0)
+ return err;
+ if ((err = ftp_seek(h, pos, SEEK_SET)) < 0) {
+ av_log(h, AV_LOG_ERROR, "Position cannot be restored.\n");
+ return err;
+ }
+ if (!retry_done) {
+ retry_done = 1;
+ goto retry;
}
}
return read;
static int ftp_write(URLContext *h, const unsigned char *buf, int size)
{
+ int err;
FTPContext *s = h->priv_data;
int written;
av_dlog(h, "ftp protocol write %d bytes\n", size);
+ if (s->state == DISCONNECTED) {
+ if ((err = ftp_connect_data_connection(h)) < 0)
+ return err;
+ }
if (s->state == READY) {
- ftp_store(s);
+ if ((err = ftp_store(s)) < 0)
+ return err;
}
if (s->conn_data && s->state == UPLOADING) {
written = ffurl_write(s->conn_data, buf, size);
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);
+ ftp_close_both_connections(h->priv_data);
return 0;
}
projects / ffmpeg / blobdiff