#include "md5.h"
#ifdef G_OS_WIN32
-#define FIONREAD_TYPE gulong
-#define IOCTL_SOCKET ioctlsocket
#define READ_SOCKET(fd, buf, len) recv (fd, (char *)buf, len, 0)
#define WRITE_SOCKET(fd, buf, len) send (fd, (const char *)buf, len, 0)
#define SETSOCKOPT(sock, level, name, val, len) setsockopt (sock, level, name, (const char *)val, len)
#define CLOSE_SOCKET(sock) closesocket (sock)
-#define ERRNO_IS_NOT_EAGAIN (WSAGetLastError () != WSAEWOULDBLOCK)
-#define ERRNO_IS_NOT_EINTR (WSAGetLastError () != WSAEINTR)
+#define ERRNO_IS_EAGAIN (WSAGetLastError () == WSAEWOULDBLOCK)
+#define ERRNO_IS_EINTR (WSAGetLastError () == WSAEINTR)
/* According to Microsoft's connect() documentation this one returns
* WSAEWOULDBLOCK and not WSAEINPROGRESS. */
-#define ERRNO_IS_NOT_EINPROGRESS (WSAGetLastError () != WSAEWOULDBLOCK)
+#define ERRNO_IS_EINPROGRESS (WSAGetLastError () == WSAEWOULDBLOCK)
#else
-#define FIONREAD_TYPE gint
-#define IOCTL_SOCKET ioctl
#define READ_SOCKET(fd, buf, len) read (fd, buf, len)
#define WRITE_SOCKET(fd, buf, len) write (fd, buf, len)
#define SETSOCKOPT(sock, level, name, val, len) setsockopt (sock, level, name, val, len)
#define CLOSE_SOCKET(sock) close (sock)
-#define ERRNO_IS_NOT_EAGAIN (errno != EAGAIN)
-#define ERRNO_IS_NOT_EINTR (errno != EINTR)
-#define ERRNO_IS_NOT_EINPROGRESS (errno != EINPROGRESS)
+#define ERRNO_IS_EAGAIN (errno == EAGAIN)
+#define ERRNO_IS_EINTR (errno == EINTR)
+#define ERRNO_IS_EINPROGRESS (errno == EINPROGRESS)
#endif
#ifdef G_OS_WIN32
}
#endif
+enum
+{
+ STATE_START = 0,
+ STATE_DATA_HEADER,
+ STATE_DATA_BODY,
+ STATE_READ_LINES,
+ STATE_END,
+ STATE_LAST
+};
+
+/* a structure for constructing RTSPMessages */
+typedef struct
+{
+ gint state;
+ guint8 buffer[4096];
+ guint offset;
+
+ guint line;
+ guint8 *body_data;
+ glong body_len;
+} GstRTSPBuilder;
+
+static void
+build_reset (GstRTSPBuilder * builder)
+{
+ g_free (builder->body_data);
+ memset (builder, 0, sizeof (builder));
+}
+
/**
* gst_rtsp_connection_create:
* @url: a #GstRTSPUrl
newconn->url = url;
newconn->fd.fd = -1;
newconn->timer = g_timer_new ();
+ newconn->timeout = 60;
newconn->auth_method = GST_RTSP_AUTH_NONE;
newconn->username = NULL;
ret = connect (fd, (struct sockaddr *) &sa_in, sizeof (sa_in));
if (ret == 0)
goto done;
- if (ERRNO_IS_NOT_EINPROGRESS)
+ if (!ERRNO_IS_EINPROGRESS)
goto sys_error;
/* wait for connect to complete up to the specified timeout or until we got
goto sys_error;
/* we can still have an error connecting on windows */
- if (gst_poll_fd_has_error (conn->fdset, &conn->fd))
+ if (gst_poll_fd_has_error (conn->fdset, &conn->fd)) {
+ socklen_t len = sizeof (errno);
+ getsockopt (conn->fd.fd, SOL_SOCKET, SO_ERROR, &errno, &len);
goto sys_error;
+ }
gst_poll_fd_ignored (conn->fdset, &conn->fd);
gst_rtsp_message_add_header (message, GST_RTSP_HDR_DATE, date_string);
}
+static GstRTSPResult
+write_bytes (gint fd, const guint8 * buffer, guint * idx, guint size)
+{
+ guint left;
+
+ if (*idx > size)
+ return GST_RTSP_ERROR;
+
+ left = size - *idx;
+
+ while (left) {
+ gint r;
+
+ r = WRITE_SOCKET (fd, &buffer[*idx], left);
+ if (r == 0) {
+ return GST_RTSP_EINTR;
+ } else if (r < 0) {
+ if (ERRNO_IS_EAGAIN)
+ return GST_RTSP_EINTR;
+ if (!ERRNO_IS_EINTR)
+ return GST_RTSP_ESYS;
+ } else {
+ left -= r;
+ *idx += r;
+ }
+ }
+ return GST_RTSP_OK;
+}
+
+static GstRTSPResult
+read_bytes (gint fd, guint8 * buffer, guint * idx, guint size)
+{
+ guint left;
+
+ if (*idx > size)
+ return GST_RTSP_ERROR;
+
+ left = size - *idx;
+
+ while (left) {
+ gint r;
+
+ r = READ_SOCKET (fd, &buffer[*idx], left);
+ if (r == 0) {
+ return GST_RTSP_EEOF;
+ } else if (r < 0) {
+ if (ERRNO_IS_EAGAIN)
+ return GST_RTSP_EINTR;
+ if (!ERRNO_IS_EINTR)
+ return GST_RTSP_ESYS;
+ } else {
+ left -= r;
+ *idx += r;
+ }
+ }
+ return GST_RTSP_OK;
+}
+
+static GstRTSPResult
+read_line (gint fd, guint8 * buffer, guint * idx, guint size)
+{
+ while (TRUE) {
+ guint8 c;
+ gint r;
+
+ r = READ_SOCKET (fd, &c, 1);
+ if (r == 0) {
+ return GST_RTSP_EEOF;
+ } else if (r < 0) {
+ if (ERRNO_IS_EAGAIN)
+ return GST_RTSP_EINTR;
+ if (!ERRNO_IS_EINTR)
+ return GST_RTSP_ESYS;
+ } else {
+ if (c == '\n') /* end on \n */
+ break;
+ if (c == '\r') /* ignore \r */
+ continue;
+
+ if (*idx < size - 1)
+ buffer[(*idx)++] = c;
+ }
+ }
+ buffer[*idx] = '\0';
+
+ return GST_RTSP_OK;
+}
+
/**
* gst_rtsp_connection_write:
* @conn: a #GstRTSPConnection
gst_rtsp_connection_write (GstRTSPConnection * conn, const guint8 * data,
guint size, GTimeVal * timeout)
{
- guint towrite;
+ guint offset;
gint retval;
GstClockTime to;
+ GstRTSPResult res;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (data != NULL || size == 0, GST_RTSP_EINVAL);
to = timeout ? GST_TIMEVAL_TO_TIME (*timeout) : GST_CLOCK_TIME_NONE;
- towrite = size;
+ offset = 0;
- while (towrite > 0) {
- gint written;
+ while (TRUE) {
+ /* try to write */
+ res = write_bytes (conn->fd.fd, data, &offset, size);
+ if (res == GST_RTSP_OK)
+ break;
+ if (res != GST_RTSP_EINTR)
+ goto write_error;
+ /* not all is written, wait until we can write more */
do {
retval = gst_poll_wait (conn->fdset, to);
} while (retval == -1 && (errno == EINTR || errno == EAGAIN));
else
goto select_error;
}
-
- /* now we can write */
- written = WRITE_SOCKET (conn->fd.fd, data, towrite);
- if (written < 0) {
- if (ERRNO_IS_NOT_EAGAIN && ERRNO_IS_NOT_EINTR)
- goto write_error;
- } else {
- towrite -= written;
- data += written;
- }
}
return GST_RTSP_OK;
}
write_error:
{
- return GST_RTSP_ESYS;
+ return res;
}
}
-/**
- * gst_rtsp_connection_send:
- * @conn: a #GstRTSPConnection
- * @message: the message to send
- * @timeout: a timeout value or #NULL
- *
- * Attempt to send @message to the connected @conn, blocking up to
- * the specified @timeout. @timeout can be #NULL, in which case this function
- * might block forever.
- *
- * This function can be cancelled with gst_rtsp_connection_flush().
- *
- * Returns: #GST_RTSP_OK on success.
- */
-GstRTSPResult
-gst_rtsp_connection_send (GstRTSPConnection * conn, GstRTSPMessage * message,
- GTimeVal * timeout)
+static GString *
+message_to_string (GstRTSPConnection * conn, GstRTSPMessage * message)
{
GString *str = NULL;
- GstRTSPResult res;
-
-#ifdef G_OS_WIN32
- WSADATA w;
- int error;
-#endif
-
- g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
- g_return_val_if_fail (message != NULL, GST_RTSP_EINVAL);
-
-#ifdef G_OS_WIN32
- error = WSAStartup (0x0202, &w);
-
- if (error)
- goto startup_error;
-
- if (w.wVersion != 0x0202)
- goto version_error;
-#endif
str = g_string_new ("");
break;
}
default:
- g_return_val_if_reached (GST_RTSP_EINVAL);
+ g_string_free (str, TRUE);
+ g_return_val_if_reached (NULL);
break;
}
}
}
+ return str;
+}
+
+/**
+ * gst_rtsp_connection_send:
+ * @conn: a #GstRTSPConnection
+ * @message: the message to send
+ * @timeout: a timeout value or #NULL
+ *
+ * Attempt to send @message to the connected @conn, blocking up to
+ * the specified @timeout. @timeout can be #NULL, in which case this function
+ * might block forever.
+ *
+ * This function can be cancelled with gst_rtsp_connection_flush().
+ *
+ * Returns: #GST_RTSP_OK on success.
+ */
+GstRTSPResult
+gst_rtsp_connection_send (GstRTSPConnection * conn, GstRTSPMessage * message,
+ GTimeVal * timeout)
+{
+ GString *str = NULL;
+ GstRTSPResult res;
+
+#ifdef G_OS_WIN32
+ WSADATA w;
+ int error;
+#endif
+
+ g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
+ g_return_val_if_fail (message != NULL, GST_RTSP_EINVAL);
+
+#ifdef G_OS_WIN32
+ error = WSAStartup (0x0202, &w);
+
+ if (error)
+ goto startup_error;
+
+ if (w.wVersion != 0x0202)
+ goto version_error;
+#endif
+
+ if (!(str = message_to_string (conn, message)))
+ goto no_message;
+
/* write request */
res =
gst_rtsp_connection_write (conn, (guint8 *) str->str, str->len, timeout);
return res;
+no_message:
+ {
+ g_warning ("Wrong message");
+ return GST_RTSP_EINVAL;
+ }
#ifdef G_OS_WIN32
startup_error:
{
#endif
}
-static GstRTSPResult
-read_line (gint fd, gchar * buffer, guint size)
-{
- guint idx;
- gchar c;
- gint r;
-
- idx = 0;
- while (TRUE) {
- r = READ_SOCKET (fd, &c, 1);
- if (r == 0) {
- goto eof;
- } else if (r < 0) {
- if (ERRNO_IS_NOT_EAGAIN && ERRNO_IS_NOT_EINTR)
- goto read_error;
- } else {
- if (c == '\n') /* end on \n */
- break;
- if (c == '\r') /* ignore \r */
- continue;
-
- if (idx < size - 1)
- buffer[idx++] = c;
- }
- }
- buffer[idx] = '\0';
-
- return GST_RTSP_OK;
-
-eof:
- {
- return GST_RTSP_EEOF;
- }
-read_error:
- {
- return GST_RTSP_ESYS;
- }
-}
-
static void
-read_string (gchar * dest, gint size, gchar ** src)
+parse_string (gchar * dest, gint size, gchar ** src)
{
gint idx;
}
static void
-read_key (gchar * dest, gint size, gchar ** src)
+parse_key (gchar * dest, gint size, gchar ** src)
{
gint idx;
}
static GstRTSPResult
-parse_response_status (gchar * buffer, GstRTSPMessage * msg)
+parse_response_status (guint8 * buffer, GstRTSPMessage * msg)
{
GstRTSPResult res;
gchar versionstr[20];
gint code;
gchar *bptr;
- bptr = buffer;
+ bptr = (gchar *) buffer;
- read_string (versionstr, sizeof (versionstr), &bptr);
- read_string (codestr, sizeof (codestr), &bptr);
+ parse_string (versionstr, sizeof (versionstr), &bptr);
+ parse_string (codestr, sizeof (codestr), &bptr);
code = atoi (codestr);
while (g_ascii_isspace (*bptr))
}
static GstRTSPResult
-parse_request_line (gchar * buffer, GstRTSPMessage * msg)
+parse_request_line (guint8 * buffer, GstRTSPMessage * msg)
{
GstRTSPResult res = GST_RTSP_OK;
gchar versionstr[20];
gchar *bptr;
GstRTSPMethod method;
- bptr = buffer;
+ bptr = (gchar *) buffer;
- read_string (methodstr, sizeof (methodstr), &bptr);
+ parse_string (methodstr, sizeof (methodstr), &bptr);
method = gst_rtsp_find_method (methodstr);
- read_string (urlstr, sizeof (urlstr), &bptr);
+ parse_string (urlstr, sizeof (urlstr), &bptr);
if (*urlstr == '\0')
res = GST_RTSP_EPARSE;
- read_string (versionstr, sizeof (versionstr), &bptr);
+ parse_string (versionstr, sizeof (versionstr), &bptr);
if (*bptr != '\0')
res = GST_RTSP_EPARSE;
/* parsing lines means reading a Key: Value pair */
static GstRTSPResult
-parse_line (gchar * buffer, GstRTSPMessage * msg)
+parse_line (guint8 * buffer, GstRTSPMessage * msg)
{
gchar key[32];
gchar *bptr;
GstRTSPHeaderField field;
- bptr = buffer;
+ bptr = (gchar *) buffer;
/* read key */
- read_key (key, sizeof (key), &bptr);
+ parse_key (key, sizeof (key), &bptr);
if (*bptr != ':')
goto no_column;
}
}
+/* returns:
+ * GST_RTSP_OK when a complete message was read.
+ * GST_RTSP_EEOF: when the socket is closed
+ * GST_RTSP_EINTR: when more data is needed.
+ * GST_RTSP_..: some other error occured.
+ */
+static GstRTSPResult
+build_next (GstRTSPBuilder * builder, GstRTSPMessage * message,
+ GstRTSPConnection * conn)
+{
+ GstRTSPResult res;
+
+ while (TRUE) {
+ switch (builder->state) {
+ case STATE_START:
+ builder->offset = 0;
+ res =
+ read_bytes (conn->fd.fd, (guint8 *) builder->buffer,
+ &builder->offset, 1);
+ if (res != GST_RTSP_OK)
+ goto done;
+
+ /* we have 1 bytes now and we can see if this is a data message or
+ * not */
+ if (builder->buffer[0] == '$') {
+ /* data message, prepare for the header */
+ builder->state = STATE_DATA_HEADER;
+ } else {
+ builder->line = 0;
+ builder->state = STATE_READ_LINES;
+ }
+ break;
+ case STATE_DATA_HEADER:
+ {
+ res =
+ read_bytes (conn->fd.fd, (guint8 *) builder->buffer,
+ &builder->offset, 4);
+ if (res != GST_RTSP_OK)
+ goto done;
+
+ gst_rtsp_message_init_data (message, builder->buffer[1]);
+
+ builder->body_len = (builder->buffer[2] << 8) | builder->buffer[3];
+ builder->body_data = g_malloc (builder->body_len + 1);
+ builder->body_data[builder->body_len] = '\0';
+ builder->offset = 0;
+ builder->state = STATE_DATA_BODY;
+ break;
+ }
+ case STATE_DATA_BODY:
+ {
+ res = read_bytes (conn->fd.fd, builder->body_data, &builder->offset,
+ builder->body_len);
+ if (res != GST_RTSP_OK)
+ goto done;
+
+ /* we have the complete body now */
+ gst_rtsp_message_take_body (message,
+ (guint8 *) builder->body_data, builder->body_len);
+ builder->body_data = NULL;
+ builder->body_len = 0;
+
+ builder->state = STATE_END;
+ break;
+ }
+ case STATE_READ_LINES:
+ {
+ res = read_line (conn->fd.fd, builder->buffer, &builder->offset,
+ sizeof (builder->buffer));
+ if (res != GST_RTSP_OK)
+ goto done;
+
+ /* we have a regular response */
+ if (builder->buffer[0] == '\r') {
+ builder->buffer[0] = '\0';
+ }
+
+ if (builder->buffer[0] == '\0') {
+ gchar *hdrval;
+
+ /* empty line, end of message header */
+ /* see if there is a Content-Length header */
+ if (gst_rtsp_message_get_header (message,
+ GST_RTSP_HDR_CONTENT_LENGTH, &hdrval, 0) == GST_RTSP_OK) {
+ /* there is, prepare to read the body */
+ builder->body_len = atol (hdrval);
+ builder->body_data = g_malloc (builder->body_len + 1);
+ builder->body_data[builder->body_len] = '\0';
+ builder->offset = 0;
+ builder->state = STATE_DATA_BODY;
+ } else {
+ builder->state = STATE_END;
+ }
+ break;
+ }
+
+ /* we have a line */
+ if (builder->line == 0) {
+ /* first line, check for response status */
+ if (memcmp (builder->buffer, "RTSP", 4) == 0) {
+ res = parse_response_status (builder->buffer, message);
+ } else {
+ res = parse_request_line (builder->buffer, message);
+ }
+ } else {
+ /* else just parse the line */
+ parse_line (builder->buffer, message);
+ }
+ builder->line++;
+ builder->offset = 0;
+ break;
+ }
+ case STATE_END:
+ {
+ gchar *session_id;
+
+ /* save session id in the connection for further use */
+ if (gst_rtsp_message_get_header (message, GST_RTSP_HDR_SESSION,
+ &session_id, 0) == GST_RTSP_OK) {
+ gint maxlen, i;
+
+ maxlen = sizeof (conn->session_id) - 1;
+ /* the sessionid can have attributes marked with ;
+ * Make sure we strip them */
+ for (i = 0; session_id[i] != '\0'; i++) {
+ if (session_id[i] == ';') {
+ maxlen = i;
+ /* parse timeout */
+ do {
+ i++;
+ } while (g_ascii_isspace (session_id[i]));
+ if (g_str_has_prefix (&session_id[i], "timeout=")) {
+ gint to;
+
+ /* if we parsed something valid, configure */
+ if ((to = atoi (&session_id[i + 9])) > 0)
+ conn->timeout = to;
+ }
+ break;
+ }
+ }
+
+ /* make sure to not overflow */
+ strncpy (conn->session_id, session_id, maxlen);
+ conn->session_id[maxlen] = '\0';
+ }
+ res = GST_RTSP_OK;
+ goto done;
+ }
+ default:
+ res = GST_RTSP_ERROR;
+ break;
+ }
+ }
+done:
+ return res;
+}
+
/**
- * gst_rtsp_connection_read_internal:
+ * gst_rtsp_connection_read:
* @conn: a #GstRTSPConnection
* @data: the data to read
* @size: the size of @data
* @timeout: a timeout value or #NULL
- * @allow_interrupt: can the pending read be interrupted
*
* Attempt to read @size bytes into @data from the connected @conn, blocking up to
* the specified @timeout. @timeout can be #NULL, in which case this function
* might block forever.
- *
- * This function can be cancelled with gst_rtsp_connection_flush() only if
- * @allow_interrupt is set.
+ *
+ * This function can be cancelled with gst_rtsp_connection_flush().
*
* Returns: #GST_RTSP_OK on success.
*/
-static GstRTSPResult
-gst_rtsp_connection_read_internal (GstRTSPConnection * conn, guint8 * data,
- guint size, GTimeVal * timeout, gboolean allow_interrupt)
+GstRTSPResult
+gst_rtsp_connection_read (GstRTSPConnection * conn, guint8 * data, guint size,
+ GTimeVal * timeout)
{
- guint toread;
+ guint offset;
gint retval;
GstClockTime to;
- FIONREAD_TYPE avail;
+ GstRTSPResult res;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (data != NULL, GST_RTSP_EINVAL);
if (size == 0)
return GST_RTSP_OK;
- toread = size;
+ offset = 0;
/* configure timeout if any */
to = timeout ? GST_TIMEVAL_TO_TIME (*timeout) : GST_CLOCK_TIME_NONE;
- /* if the call fails, just go in the select.. it should not fail. Else if
- * there is enough data to read, skip the select call al together.*/
- if (IOCTL_SOCKET (conn->fd.fd, FIONREAD, &avail) < 0)
- avail = 0;
- else if (avail >= toread)
- goto do_read;
-
- gst_poll_set_controllable (conn->fdset, allow_interrupt);
+ gst_poll_set_controllable (conn->fdset, TRUE);
gst_poll_fd_ctl_write (conn->fdset, &conn->fd, FALSE);
gst_poll_fd_ctl_read (conn->fdset, &conn->fd, TRUE);
- while (toread > 0) {
- gint bytes;
+ while (TRUE) {
+ res = read_bytes (conn->fd.fd, data, &offset, size);
+ if (res == GST_RTSP_EEOF)
+ goto eof;
+ if (res == GST_RTSP_OK)
+ break;
+ if (res != GST_RTSP_EINTR)
+ goto read_error;
do {
retval = gst_poll_wait (conn->fdset, to);
} while (retval == -1 && (errno == EINTR || errno == EAGAIN));
+ /* check for timeout */
+ if (retval == 0)
+ goto select_timeout;
+
if (retval == -1) {
if (errno == EBUSY)
goto stopped;
else
goto select_error;
}
-
- /* check for timeout */
- if (retval == 0)
- goto select_timeout;
-
- do_read:
- /* if we get here there is activity on the real fd since the select
- * completed and the control socket was not readable. */
- bytes = READ_SOCKET (conn->fd.fd, data, toread);
- if (bytes == 0) {
- goto eof;
- } else if (bytes < 0) {
- if (ERRNO_IS_NOT_EAGAIN && ERRNO_IS_NOT_EINTR)
- goto read_error;
- } else {
- toread -= bytes;
- data += bytes;
- }
+ gst_poll_set_controllable (conn->fdset, FALSE);
}
return GST_RTSP_OK;
}
read_error:
{
- return GST_RTSP_ESYS;
- }
-}
-
-/**
- * gst_rtsp_connection_read:
- * @conn: a #GstRTSPConnection
- * @data: the data to read
- * @size: the size of @data
- * @timeout: a timeout value or #NULL
- *
- * Attempt to read @size bytes into @data from the connected @conn, blocking up to
- * the specified @timeout. @timeout can be #NULL, in which case this function
- * might block forever.
- *
- * This function can be cancelled with gst_rtsp_connection_flush().
- *
- * Returns: #GST_RTSP_OK on success.
- */
-GstRTSPResult
-gst_rtsp_connection_read (GstRTSPConnection * conn, guint8 * data, guint size,
- GTimeVal * timeout)
-{
- return gst_rtsp_connection_read_internal (conn, data, size, timeout, TRUE);
-}
-
-
-static GstRTSPResult
-read_body (GstRTSPConnection * conn, glong content_length, GstRTSPMessage * msg,
- GTimeVal * timeout)
-{
- guint8 *body;
- GstRTSPResult res;
-
- if (content_length <= 0) {
- body = NULL;
- content_length = 0;
- goto done;
- }
-
- body = g_malloc (content_length + 1);
- body[content_length] = '\0';
-
- GST_RTSP_CHECK (gst_rtsp_connection_read_internal (conn, body, content_length,
- timeout, FALSE), read_error);
-
- content_length += 1;
-
-done:
- gst_rtsp_message_take_body (msg, (guint8 *) body, content_length);
-
- return GST_RTSP_OK;
-
- /* ERRORS */
-read_error:
- {
- g_free (body);
return res;
}
}
+
/**
* gst_rtsp_connection_receive:
* @conn: a #GstRTSPConnection
gst_rtsp_connection_receive (GstRTSPConnection * conn, GstRTSPMessage * message,
GTimeVal * timeout)
{
- gchar buffer[4096];
- gint line;
- glong content_length;
GstRTSPResult res;
- gboolean need_body;
+ GstRTSPBuilder builder = { 0 };
+ gint retval;
+ GstClockTime to;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (message != NULL, GST_RTSP_EINVAL);
- line = 0;
-
- need_body = TRUE;
-
- res = GST_RTSP_OK;
- /* parse first line and headers */
- while (res == GST_RTSP_OK) {
- guint8 c;
-
- /* read first character, this identifies data messages */
- /* This is the only read() that we allow to be interrupted */
- GST_RTSP_CHECK (gst_rtsp_connection_read_internal (conn, &c, 1, timeout,
- TRUE), read_error);
-
- /* check for data packet, first character is $ */
- if (c == '$') {
- guint16 size;
-
- /* data packets are $<1 byte channel><2 bytes length,BE><data bytes> */
-
- /* read channel, which is the next char */
- GST_RTSP_CHECK (gst_rtsp_connection_read_internal (conn, &c, 1, timeout,
- FALSE), read_error);
-
- /* now we create a data message */
- gst_rtsp_message_init_data (message, c);
-
- /* next two bytes are the length of the data */
- GST_RTSP_CHECK (gst_rtsp_connection_read_internal (conn,
- (guint8 *) & size, 2, timeout, FALSE), read_error);
+ /* configure timeout if any */
+ to = timeout ? GST_TIMEVAL_TO_TIME (*timeout) : GST_CLOCK_TIME_NONE;
- size = GUINT16_FROM_BE (size);
+ gst_poll_set_controllable (conn->fdset, TRUE);
+ gst_poll_fd_ctl_write (conn->fdset, &conn->fd, FALSE);
+ gst_poll_fd_ctl_read (conn->fdset, &conn->fd, TRUE);
- /* and read the body */
- res = read_body (conn, size, message, timeout);
- need_body = FALSE;
+ while (TRUE) {
+ res = build_next (&builder, message, conn);
+ if (res == GST_RTSP_EEOF)
+ goto eof;
+ if (res == GST_RTSP_OK)
break;
- } else {
- gint offset = 0;
+ if (res != GST_RTSP_EINTR)
+ goto read_error;
- /* we have a regular response */
- if (c != '\r') {
- buffer[0] = c;
- offset = 1;
- }
- /* should not happen */
- if (c == '\n')
- break;
-
- /* read lines */
- GST_RTSP_CHECK (read_line (conn->fd.fd, buffer + offset,
- sizeof (buffer) - offset), read_error);
+ do {
+ retval = gst_poll_wait (conn->fdset, to);
+ } while (retval == -1 && (errno == EINTR || errno == EAGAIN));
- if (buffer[0] == '\0')
- break;
+ /* check for timeout */
+ if (retval == 0)
+ goto select_timeout;
- if (line == 0) {
- /* first line, check for response status */
- if (g_str_has_prefix (buffer, "RTSP")) {
- res = parse_response_status (buffer, message);
- } else {
- res = parse_request_line (buffer, message);
- }
- } else {
- /* else just parse the line */
- parse_line (buffer, message);
- }
+ if (retval == -1) {
+ if (errno == EBUSY)
+ goto stopped;
+ else
+ goto select_error;
}
- line++;
+ gst_poll_set_controllable (conn->fdset, FALSE);
}
- /* read the rest of the body if needed */
- if (need_body) {
- gchar *session_id;
- gchar *hdrval;
-
- /* see if there is a Content-Length header */
- if (gst_rtsp_message_get_header (message, GST_RTSP_HDR_CONTENT_LENGTH,
- &hdrval, 0) == GST_RTSP_OK) {
- /* there is, read the body */
- content_length = atol (hdrval);
- GST_RTSP_CHECK (read_body (conn, content_length, message, timeout),
- read_error);
- }
+ /* we have a message here */
+ build_reset (&builder);
- /* save session id in the connection for further use */
- if (gst_rtsp_message_get_header (message, GST_RTSP_HDR_SESSION,
- &session_id, 0) == GST_RTSP_OK) {
- gint maxlen, i;
-
- /* default session timeout */
- conn->timeout = 60;
-
- maxlen = sizeof (conn->session_id) - 1;
- /* the sessionid can have attributes marked with ;
- * Make sure we strip them */
- for (i = 0; session_id[i] != '\0'; i++) {
- if (session_id[i] == ';') {
- maxlen = i;
- /* parse timeout */
- do {
- i++;
- } while (g_ascii_isspace (session_id[i]));
- if (g_str_has_prefix (&session_id[i], "timeout=")) {
- gint to;
-
- /* if we parsed something valid, configure */
- if ((to = atoi (&session_id[i + 9])) > 0)
- conn->timeout = to;
- }
- break;
- }
- }
+ return GST_RTSP_OK;
- /* make sure to not overflow */
- strncpy (conn->session_id, session_id, maxlen);
- conn->session_id[maxlen] = '\0';
- }
+ /* ERRORS */
+select_error:
+ {
+ res = GST_RTSP_ESYS;
+ goto cleanup;
+ }
+select_timeout:
+ {
+ res = GST_RTSP_ETIMEOUT;
+ goto cleanup;
+ }
+stopped:
+ {
+ res = GST_RTSP_EINTR;
+ goto cleanup;
+ }
+eof:
+ {
+ res = GST_RTSP_EEOF;
+ goto cleanup;
}
- return res;
-
read_error:
+cleanup:
{
+ build_reset (&builder);
+ gst_rtsp_message_unset (message);
return res;
}
}
return conn->ip;
}
+
+#define READ_COND (G_IO_IN | G_IO_HUP | G_IO_ERR)
+#define WRITE_COND (G_IO_OUT | G_IO_ERR)
+
+typedef struct
+{
+ GString *str;
+ guint cseq;
+} GstRTSPRec;
+
+/* async functions */
+struct _GstRTSPChannel
+{
+ GSource source;
+
+ GstRTSPConnection *conn;
+
+ GstRTSPBuilder builder;
+ GstRTSPMessage message;
+
+ GPollFD readfd;
+ GPollFD writefd;
+ gboolean write_added;
+
+ /* queued message for transmission */
+ GList *messages;
+ guint8 *write_data;
+ guint write_off;
+ guint write_len;
+ guint write_cseq;
+
+ GstRTSPChannelFuncs funcs;
+
+ gpointer user_data;
+ GDestroyNotify notify;
+};
+
+static gboolean
+gst_rtsp_source_prepare (GSource * source, gint * timeout)
+{
+ GstRTSPChannel *channel = (GstRTSPChannel *) source;
+
+ *timeout = (channel->conn->timeout * 1000);
+
+ return FALSE;
+}
+
+static gboolean
+gst_rtsp_source_check (GSource * source)
+{
+ GstRTSPChannel *channel = (GstRTSPChannel *) source;
+
+ if (channel->readfd.revents & READ_COND)
+ return TRUE;
+
+ if (channel->writefd.revents & WRITE_COND)
+ return TRUE;
+
+ return FALSE;
+}
+
+static gboolean
+gst_rtsp_source_dispatch (GSource * source, GSourceFunc callback,
+ gpointer user_data)
+{
+ GstRTSPChannel *channel = (GstRTSPChannel *) source;
+ GstRTSPResult res;
+
+ /* first read as much as we can */
+ if (channel->readfd.revents & READ_COND) {
+ do {
+ res = build_next (&channel->builder, &channel->message, channel->conn);
+ if (res == GST_RTSP_EINTR)
+ break;
+ if (res == GST_RTSP_EEOF)
+ goto eof;
+ if (res != GST_RTSP_OK)
+ goto error;
+
+ if (channel->funcs.message_received)
+ channel->funcs.message_received (channel, &channel->message,
+ channel->user_data);
+
+ gst_rtsp_message_unset (&channel->message);
+ build_reset (&channel->builder);
+ } while (FALSE);
+ }
+
+ if (channel->writefd.revents & WRITE_COND) {
+ do {
+ if (channel->write_data == NULL) {
+ GstRTSPRec *data;
+
+ if (!channel->messages)
+ goto done;
+
+ /* no data, get a new message from the queue */
+ data = channel->messages->data;
+ channel->messages =
+ g_list_delete_link (channel->messages, channel->messages);
+
+ channel->write_off = 0;
+ channel->write_len = data->str->len;
+ channel->write_data = (guint8 *) g_string_free (data->str, FALSE);
+ channel->write_cseq = data->cseq;
+
+ g_slice_free (GstRTSPRec, data);
+ }
+
+ res = write_bytes (channel->writefd.fd, channel->write_data,
+ &channel->write_off, channel->write_len);
+ if (res == GST_RTSP_EINTR)
+ break;
+ if (res != GST_RTSP_OK)
+ goto error;
+
+ if (channel->funcs.message_sent)
+ channel->funcs.message_sent (channel, channel->write_cseq,
+ channel->user_data);
+
+ done:
+ if (channel->messages == NULL && channel->write_added) {
+ g_source_remove_poll ((GSource *) channel, &channel->writefd);
+ channel->write_added = FALSE;
+ channel->writefd.revents = 0;
+ }
+ g_free (channel->write_data);
+ channel->write_data = NULL;
+ } while (FALSE);
+ }
+
+ return TRUE;
+
+ /* ERRORS */
+eof:
+ {
+ if (channel->funcs.closed)
+ channel->funcs.closed (channel, channel->user_data);
+ return FALSE;
+ }
+error:
+ {
+ if (channel->funcs.error)
+ channel->funcs.error (channel, res, channel->user_data);
+ return FALSE;
+ }
+}
+
+static void
+gst_rtsp_source_finalize (GSource * source)
+{
+ GstRTSPChannel *channel = (GstRTSPChannel *) source;
+ GList *walk;
+
+ build_reset (&channel->builder);
+
+ for (walk = channel->messages; walk; walk = g_list_next (walk)) {
+ GstRTSPRec *data = walk->data;
+
+ g_string_free (data->str, TRUE);
+ g_slice_free (GstRTSPRec, data);
+ }
+ g_list_free (channel->messages);
+ g_free (channel->write_data);
+
+ if (channel->notify)
+ channel->notify (channel->user_data);
+}
+
+static GSourceFuncs gst_rtsp_source_funcs = {
+ gst_rtsp_source_prepare,
+ gst_rtsp_source_check,
+ gst_rtsp_source_dispatch,
+ gst_rtsp_source_finalize
+};
+
+/**
+ * gst_rtsp_channel_new:
+ * @conn: a #GstRTSPConnection
+ * @funcs: channel functions
+ * @user_data: user data to pass to @funcs
+ *
+ * Create a channel object for @conn. The functions provided in @funcs will be
+ * called with @user_data when activity happened on the channel.
+ *
+ * The new channel is usually created so that it can be attached to a
+ * maincontext with gst_rtsp_channel_attach().
+ *
+ * @conn must exist for the entire lifetime of the channel.
+ *
+ * Returns: a #GstRTSPChannel that can be used for asynchronous RTSP
+ * communication. Free with gst_rtsp_channel_unref () after usage.
+ *
+ * Since: 0.10.23
+ */
+GstRTSPChannel *
+gst_rtsp_channel_new (GstRTSPConnection * conn,
+ GstRTSPChannelFuncs * funcs, gpointer user_data, GDestroyNotify notify)
+{
+ GstRTSPChannel *result;
+
+ g_return_val_if_fail (conn != NULL, NULL);
+ g_return_val_if_fail (funcs != NULL, NULL);
+
+ result = (GstRTSPChannel *) g_source_new (&gst_rtsp_source_funcs,
+ sizeof (GstRTSPChannel));
+
+ result->conn = conn;
+ result->builder.state = STATE_START;
+
+ result->readfd.fd = conn->fd.fd;
+ result->readfd.events = READ_COND;
+ result->readfd.revents = 0;
+
+ result->writefd.fd = conn->fd.fd;
+ result->writefd.events = WRITE_COND;
+ result->writefd.revents = 0;
+ result->write_added = FALSE;
+
+ result->funcs = *funcs;
+ result->user_data = user_data;
+ result->notify = notify;
+
+ /* only add the read fd, the write fd is only added when we have data
+ * to send. */
+ g_source_add_poll ((GSource *) result, &result->readfd);
+
+ return result;
+}
+
+/**
+ * gst_rtsp_channel_attach:
+ * @channel: a #GstRTSPChannel
+ * @context: a GMainContext (if NULL, the default context will be used)
+ *
+ * Adds a #GstRTSPChannel to a context so that it will be executed within that context.
+ *
+ * Returns: the ID (greater than 0) for the channel within the GMainContext.
+ *
+ * Since: 0.10.23
+ */
+guint
+gst_rtsp_channel_attach (GstRTSPChannel * channel, GMainContext * context)
+{
+ g_return_val_if_fail (channel != NULL, 0);
+
+ return g_source_attach ((GSource *) channel, context);
+}
+
+/**
+ * gst_rtsp_channel_free:
+ * @channel: a #GstRTSPChannel
+ *
+ * Decreases the reference count of @channel by one. If the resulting reference
+ * count is zero the channel and associated memory will be destroyed.
+ *
+ * Since: 0.10.23
+ */
+void
+gst_rtsp_channel_unref (GstRTSPChannel * channel)
+{
+ g_return_if_fail (channel != NULL);
+
+ g_source_unref ((GSource *) channel);
+}
+
+/**
+ * gst_rtsp_channel_queue_message:
+ * @channel: a #GstRTSPChannel
+ * @message: a #GstRTSPMessage
+ *
+ * Queue a @message for transmission in @channel. The contents of this
+ * message will be serialized and transmitted when the connection of the
+ * channel becomes writable.
+ *
+ * The return value of this function will be returned as the cseq argument in
+ * the message_sent callback.
+ *
+ * Returns: the sequence number of the message or -1 if the cseq could not be
+ * determined.
+ *
+ * Since: 0.10.23
+ */
+guint
+gst_rtsp_channel_queue_message (GstRTSPChannel * channel,
+ GstRTSPMessage * message)
+{
+ GstRTSPRec *data;
+ gchar *header;
+ guint cseq;
+
+ g_return_val_if_fail (channel != NULL, GST_RTSP_EINVAL);
+ g_return_val_if_fail (message != NULL, GST_RTSP_EINVAL);
+
+ /* get the cseq from the message, when we finish writing this message on the
+ * socket we will have to pass the cseq to the callback. */
+ if (gst_rtsp_message_get_header (message, GST_RTSP_HDR_CSEQ, &header,
+ 0) == GST_RTSP_OK) {
+ cseq = atoi (header);
+ } else {
+ cseq = -1;
+ }
+
+ /* make a record with the message as a string ans cseq */
+ data = g_slice_new (GstRTSPRec);
+ data->str = message_to_string (channel->conn, message);
+ data->cseq = cseq;
+
+ /* add the record to a queue */
+ channel->messages = g_list_append (channel->messages, data);
+
+ /* make sure the main context will now also check for writability on the
+ * socket */
+ if (!channel->write_added) {
+ g_source_add_poll ((GSource *) channel, &channel->writefd);
+ channel->write_added = TRUE;
+ }
+ return cseq;
+}
projects / platform / upstream / gst-plugins-base.git / commitdiff