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gstreamer/gst-libs/gst/rtsp/gstrtspconnection.c
Wim Taymans ad1dea3122 Add more g_return_if_fail() calls 
Check that we have a valid file descriptor before entering certain functions in
order to avoid undesirable situations.
Add some more debugging in the connect method.
2009-02-04 11:18:31 +01:00

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/* GStreamer
* Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* SECTION:gstrtspconnection
* @short_description: manage RTSP connections
* @see_also: gstrtspurl
*
* <refsect2>
* <para>
* This object manages the RTSP connection to the server. It provides function
* to receive and send bytes and messages.
* </para>
* </refsect2>
*
* Last reviewed on 2007-07-24 (0.10.14)
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
/* we include this here to get the G_OS_* defines */
#include <glib.h>
#include <gst/gst.h>
#ifdef G_OS_WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#define EINPROGRESS WSAEINPROGRESS
#else
#include <sys/ioctl.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#endif
#ifdef HAVE_FIONREAD_IN_SYS_FILIO
#include <sys/filio.h>
#endif
#include "gstrtspconnection.h"
#include "gstrtspbase64.h"
#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)
/* According to Microsoft's connect() documentation this one returns
* WSAEWOULDBLOCK and not WSAEINPROGRESS. */
#define ERRNO_IS_NOT_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)
#endif
#ifdef G_OS_WIN32
static int
inet_aton (const char *c, struct in_addr *paddr)
{
/* note that inet_addr is deprecated on unix because
* inet_addr returns -1 (INADDR_NONE) for the valid 255.255.255.255
* address. */
paddr->s_addr = inet_addr (c);
if (paddr->s_addr == INADDR_NONE)
return 0;
return 1;
}
#endif
/**
* gst_rtsp_connection_create:
* @url: a #GstRTSPUrl
* @conn: a #GstRTSPConnection
*
* Create a newly allocated #GstRTSPConnection from @url and store it in @conn.
* The connection will not yet attempt to connect to @url, use
* gst_rtsp_connection_connect().
*
* Returns: #GST_RTSP_OK when @conn contains a valid connection.
*/
GstRTSPResult
gst_rtsp_connection_create (GstRTSPUrl * url, GstRTSPConnection ** conn)
{
GstRTSPConnection *newconn;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
newconn = g_new0 (GstRTSPConnection, 1);
if ((newconn->fdset = gst_poll_new (TRUE)) == NULL)
goto no_fdset;
newconn->url = url;
newconn->fd.fd = -1;
newconn->timer = g_timer_new ();
newconn->auth_method = GST_RTSP_AUTH_NONE;
newconn->username = NULL;
newconn->passwd = NULL;
newconn->auth_params = NULL;
*conn = newconn;
return GST_RTSP_OK;
/* ERRORS */
no_fdset:
{
g_free (newconn);
return GST_RTSP_ESYS;
}
}
/**
* gst_rtsp_connection_connect:
* @conn: a #GstRTSPConnection
* @timeout: a #GTimeVal timeout
*
* Attempt to connect to the url of @conn made with
* gst_rtsp_connection_create(). If @timeout is #NULL this function can block
* forever. If @timeout contains a valid timeout, this function will return
* #GST_RTSP_ETIMEOUT after the timeout expired.
*
* This function can be cancelled with gst_rtsp_connection_flush().
*
* Returns: #GST_RTSP_OK when a connection could be made.
*/
GstRTSPResult
gst_rtsp_connection_connect (GstRTSPConnection * conn, GTimeVal * timeout)
{
gint fd;
struct sockaddr_in sa_in;
struct hostent *hostinfo;
const gchar *ip;
struct in_addr addr;
gint ret;
guint16 port;
GstRTSPUrl *url;
GstClockTime to;
gint retval;
#ifdef G_OS_WIN32
unsigned long flags = 1;
struct in_addr *addrp;
#else
char **addrs;
gchar ipbuf[INET_ADDRSTRLEN];
#endif /* G_OS_WIN32 */
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (conn->url != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (conn->fd.fd < 0, GST_RTSP_EINVAL);
url = conn->url;
/* first check if it already is an IP address */
if (inet_aton (url->host, &addr)) {
ip = url->host;
} else {
hostinfo = gethostbyname (url->host);
if (!hostinfo)
goto not_resolved; /* h_errno set */
if (hostinfo->h_addrtype != AF_INET)
goto not_ip; /* host not an IP host */
#ifdef G_OS_WIN32
addrp = (struct in_addr *) hostinfo->h_addr_list[0];
/* this is not threadsafe */
ip = inet_ntoa (*addrp);
#else
addrs = hostinfo->h_addr_list;
ip = inet_ntop (AF_INET, (struct in_addr *) addrs[0], ipbuf,
sizeof (ipbuf));
#endif /* G_OS_WIN32 */
}
/* get the port from the url */
gst_rtsp_url_get_port (url, &port);
memset (&sa_in, 0, sizeof (sa_in));
sa_in.sin_family = AF_INET; /* network socket */
sa_in.sin_port = htons (port); /* on port */
sa_in.sin_addr.s_addr = inet_addr (ip); /* on host ip */
fd = socket (AF_INET, SOCK_STREAM, 0);
if (fd == -1)
goto sys_error;
/* set to non-blocking mode so that we can cancel the connect */
#ifndef G_OS_WIN32
fcntl (fd, F_SETFL, O_NONBLOCK);
#else
ioctlsocket (fd, FIONBIO, &flags);
#endif /* G_OS_WIN32 */
/* add the socket to our fdset */
conn->fd.fd = fd;
gst_poll_add_fd (conn->fdset, &conn->fd);
/* we are going to connect ASYNC now */
ret = connect (fd, (struct sockaddr *) &sa_in, sizeof (sa_in));
if (ret == 0)
goto done;
if (ERRNO_IS_NOT_EINPROGRESS)
goto sys_error;
/* wait for connect to complete up to the specified timeout or until we got
* interrupted. */
gst_poll_fd_ctl_write (conn->fdset, &conn->fd, TRUE);
to = timeout ? GST_TIMEVAL_TO_TIME (*timeout) : GST_CLOCK_TIME_NONE;
do {
retval = gst_poll_wait (conn->fdset, to);
} while (retval == -1 && (errno == EINTR || errno == EAGAIN));
if (retval == 0)
goto timeout;
else if (retval == -1)
goto sys_error;
/* we can still have an error connecting on windows */
if (gst_poll_fd_has_error (conn->fdset, &conn->fd))
goto sys_error;
gst_poll_fd_ignored (conn->fdset, &conn->fd);
done:
conn->ip = g_strdup (ip);
return GST_RTSP_OK;
sys_error:
{
GST_ERROR ("system error %d (%s)", errno, g_strerror (errno));
if (conn->fd.fd >= 0) {
GST_DEBUG ("remove fd %d", conn->fd.fd);
gst_poll_remove_fd (conn->fdset, &conn->fd);
conn->fd.fd = -1;
}
if (fd >= 0)
CLOSE_SOCKET (fd);
return GST_RTSP_ESYS;
}
not_resolved:
{
GST_ERROR ("could not resolve %s", url->host);
return GST_RTSP_ENET;
}
not_ip:
{
GST_ERROR ("not an IP address");
return GST_RTSP_ENOTIP;
}
timeout:
{
GST_ERROR ("timeout");
if (conn->fd.fd >= 0) {
GST_DEBUG ("remove fd %d", conn->fd.fd);
gst_poll_remove_fd (conn->fdset, &conn->fd);
conn->fd.fd = -1;
}
if (fd >= 0)
CLOSE_SOCKET (fd);
return GST_RTSP_ETIMEOUT;
}
}
static void
md5_digest_to_hex_string (unsigned char digest[16], char string[33])
{
static const char hexdigits[] = "0123456789abcdef";
int i;
for (i = 0; i < 16; i++) {
string[i * 2] = hexdigits[(digest[i] >> 4) & 0x0f];
string[i * 2 + 1] = hexdigits[digest[i] & 0x0f];
}
string[32] = 0;
}
static void
auth_digest_compute_hex_urp (const gchar * username,
const gchar * realm, const gchar * password, gchar hex_urp[33])
{
struct MD5Context md5_context;
unsigned char digest[16];
MD5Init (&md5_context);
MD5Update (&md5_context, username, strlen (username));
MD5Update (&md5_context, ":", 1);
MD5Update (&md5_context, realm, strlen (realm));
MD5Update (&md5_context, ":", 1);
MD5Update (&md5_context, password, strlen (password));
MD5Final (digest, &md5_context);
md5_digest_to_hex_string (digest, hex_urp);
}
static void
auth_digest_compute_response (const gchar * method,
const gchar * uri, const gchar * hex_a1, const gchar * nonce,
gchar response[33])
{
char hex_a2[33];
struct MD5Context md5_context;
unsigned char digest[16];
/* compute A2 */
MD5Init (&md5_context);
MD5Update (&md5_context, method, strlen (method));
MD5Update (&md5_context, ":", 1);
MD5Update (&md5_context, uri, strlen (uri));
MD5Final (digest, &md5_context);
md5_digest_to_hex_string (digest, hex_a2);
/* compute KD */
MD5Init (&md5_context);
MD5Update (&md5_context, hex_a1, strlen (hex_a1));
MD5Update (&md5_context, ":", 1);
MD5Update (&md5_context, nonce, strlen (nonce));
MD5Update (&md5_context, ":", 1);
MD5Update (&md5_context, hex_a2, 32);
MD5Final (digest, &md5_context);
md5_digest_to_hex_string (digest, response);
}
static void
add_auth_header (GstRTSPConnection * conn, GstRTSPMessage * message)
{
switch (conn->auth_method) {
case GST_RTSP_AUTH_BASIC:{
gchar *user_pass =
g_strdup_printf ("%s:%s", conn->username, conn->passwd);
gchar *user_pass64 =
gst_rtsp_base64_encode (user_pass, strlen (user_pass));
gchar *auth_string = g_strdup_printf ("Basic %s", user_pass64);
gst_rtsp_message_take_header (message, GST_RTSP_HDR_AUTHORIZATION,
auth_string);
g_free (user_pass);
g_free (user_pass64);
break;
}
case GST_RTSP_AUTH_DIGEST:{
gchar response[33], hex_urp[33];
gchar *auth_string, *auth_string2;
gchar *realm;
gchar *nonce;
gchar *opaque;
const gchar *uri;
const gchar *method;
/* we need to have some params set */
if (conn->auth_params == NULL)
break;
/* we need the realm and nonce */
realm = (gchar *) g_hash_table_lookup (conn->auth_params, "realm");
nonce = (gchar *) g_hash_table_lookup (conn->auth_params, "nonce");
if (realm == NULL || nonce == NULL)
break;
auth_digest_compute_hex_urp (conn->username, realm, conn->passwd,
hex_urp);
method = gst_rtsp_method_as_text (message->type_data.request.method);
uri = message->type_data.request.uri;
/* Assume no qop, algorithm=md5, stale=false */
/* For algorithm MD5, a1 = urp. */
auth_digest_compute_response (method, uri, hex_urp, nonce, response);
auth_string = g_strdup_printf ("Digest username=\"%s\", "
"realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
conn->username, realm, nonce, uri, response);
opaque = (gchar *) g_hash_table_lookup (conn->auth_params, "opaque");
if (opaque) {
auth_string2 = g_strdup_printf ("%s, opaque=\"%s\"", auth_string,
opaque);
g_free (auth_string);
auth_string = auth_string2;
}
gst_rtsp_message_take_header (message, GST_RTSP_HDR_AUTHORIZATION,
auth_string);
break;
}
default:
/* Nothing to do */
break;
}
}
static void
add_date_header (GstRTSPMessage * message)
{
GTimeVal tv;
gchar date_string[100];
time_t t;
#ifdef HAVE_GMTIME_R
struct tm tm_;
#endif
g_get_current_time (&tv);
t = (time_t) tv.tv_sec;
#ifdef HAVE_GMTIME_R
strftime (date_string, sizeof (date_string), "%a, %d %b %Y %H:%M:%S GMT",
gmtime_r (&t, &tm_));
#else
strftime (date_string, sizeof (date_string), "%a, %d %b %Y %H:%M:%S GMT",
gmtime (&t));
#endif
gst_rtsp_message_add_header (message, GST_RTSP_HDR_DATE, date_string);
}
/**
* gst_rtsp_connection_write:
* @conn: a #GstRTSPConnection
* @data: the data to write
* @size: the size of @data
* @timeout: a timeout value or #NULL
*
* Attempt to write @size bytes of @data 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_write (GstRTSPConnection * conn, const guint8 * data,
guint size, GTimeVal * timeout)
{
guint towrite;
gint retval;
GstClockTime to;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (data != NULL || size == 0, GST_RTSP_EINVAL);
g_return_val_if_fail (conn->fd.fd >= 0, GST_RTSP_EINVAL);
gst_poll_set_controllable (conn->fdset, TRUE);
gst_poll_fd_ctl_write (conn->fdset, &conn->fd, TRUE);
gst_poll_fd_ctl_read (conn->fdset, &conn->fd, FALSE);
/* clear all previous poll results */
gst_poll_fd_ignored (conn->fdset, &conn->fd);
to = timeout ? GST_TIMEVAL_TO_TIME (*timeout) : GST_CLOCK_TIME_NONE;
towrite = size;
while (towrite > 0) {
gint written;
do {
retval = gst_poll_wait (conn->fdset, to);
} while (retval == -1 && (errno == EINTR || errno == EAGAIN));
if (retval == 0)
goto timeout;
if (retval == -1) {
if (errno == EBUSY)
goto stopped;
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;
/* ERRORS */
timeout:
{
return GST_RTSP_ETIMEOUT;
}
select_error:
{
return GST_RTSP_ESYS;
}
stopped:
{
return GST_RTSP_EINTR;
}
write_error:
{
return GST_RTSP_ESYS;
}
}
/**
* 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
str = g_string_new ("");
switch (message->type) {
case GST_RTSP_MESSAGE_REQUEST:
/* create request string, add CSeq */
g_string_append_printf (str, "%s %s RTSP/1.0\r\n"
"CSeq: %d\r\n",
gst_rtsp_method_as_text (message->type_data.request.method),
message->type_data.request.uri, conn->cseq++);
/* add session id if we have one */
if (conn->session_id[0] != '\0') {
gst_rtsp_message_add_header (message, GST_RTSP_HDR_SESSION,
conn->session_id);
}
/* add any authentication headers */
add_auth_header (conn, message);
break;
case GST_RTSP_MESSAGE_RESPONSE:
/* create response string */
g_string_append_printf (str, "RTSP/1.0 %d %s\r\n",
message->type_data.response.code, message->type_data.response.reason);
break;
case GST_RTSP_MESSAGE_DATA:
{
guint8 data_header[4];
/* prepare data header */
data_header[0] = '$';
data_header[1] = message->type_data.data.channel;
data_header[2] = (message->body_size >> 8) & 0xff;
data_header[3] = message->body_size & 0xff;
/* create string with header and data */
str = g_string_append_len (str, (gchar *) data_header, 4);
str =
g_string_append_len (str, (gchar *) message->body,
message->body_size);
break;
}
default:
g_return_val_if_reached (GST_RTSP_EINVAL);
break;
}
/* append headers and body */
if (message->type != GST_RTSP_MESSAGE_DATA) {
/* add date header */
add_date_header (message);
/* append headers */
gst_rtsp_message_append_headers (message, str);
/* append Content-Length and body if needed */
if (message->body != NULL && message->body_size > 0) {
gchar *len;
len = g_strdup_printf ("%d", message->body_size);
g_string_append_printf (str, "%s: %s\r\n",
gst_rtsp_header_as_text (GST_RTSP_HDR_CONTENT_LENGTH), len);
g_free (len);
/* header ends here */
g_string_append (str, "\r\n");
str =
g_string_append_len (str, (gchar *) message->body,
message->body_size);
} else {
/* just end headers */
g_string_append (str, "\r\n");
}
}
/* write request */
res =
gst_rtsp_connection_write (conn, (guint8 *) str->str, str->len, timeout);
g_string_free (str, TRUE);
return res;
#ifdef G_OS_WIN32
startup_error:
{
g_warning ("Error %d on WSAStartup", error);
return GST_RTSP_EWSASTART;
}
version_error:
{
g_warning ("Windows sockets are not version 0x202 (current 0x%x)",
w.wVersion);
WSACleanup ();
return GST_RTSP_EWSAVERSION;
}
#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)
{
gint idx;
idx = 0;
/* skip spaces */
while (g_ascii_isspace (**src))
(*src)++;
while (!g_ascii_isspace (**src) && **src != '\0') {
if (idx < size - 1)
dest[idx++] = **src;
(*src)++;
}
if (size > 0)
dest[idx] = '\0';
}
static void
read_key (gchar * dest, gint size, gchar ** src)
{
gint idx;
idx = 0;
while (**src != ':' && **src != '\0') {
if (idx < size - 1)
dest[idx++] = **src;
(*src)++;
}
if (size > 0)
dest[idx] = '\0';
}
static GstRTSPResult
parse_response_status (gchar * buffer, GstRTSPMessage * msg)
{
GstRTSPResult res;
gchar versionstr[20];
gchar codestr[4];
gint code;
gchar *bptr;
bptr = buffer;
read_string (versionstr, sizeof (versionstr), &bptr);
read_string (codestr, sizeof (codestr), &bptr);
code = atoi (codestr);
while (g_ascii_isspace (*bptr))
bptr++;
if (strcmp (versionstr, "RTSP/1.0") == 0)
GST_RTSP_CHECK (gst_rtsp_message_init_response (msg, code, bptr, NULL),
parse_error);
else if (strncmp (versionstr, "RTSP/", 5) == 0) {
GST_RTSP_CHECK (gst_rtsp_message_init_response (msg, code, bptr, NULL),
parse_error);
msg->type_data.response.version = GST_RTSP_VERSION_INVALID;
} else
goto parse_error;
return GST_RTSP_OK;
parse_error:
{
return GST_RTSP_EPARSE;
}
}
static GstRTSPResult
parse_request_line (gchar * buffer, GstRTSPMessage * msg)
{
GstRTSPResult res = GST_RTSP_OK;
gchar versionstr[20];
gchar methodstr[20];
gchar urlstr[4096];
gchar *bptr;
GstRTSPMethod method;
bptr = buffer;
read_string (methodstr, sizeof (methodstr), &bptr);
method = gst_rtsp_find_method (methodstr);
read_string (urlstr, sizeof (urlstr), &bptr);
if (*urlstr == '\0')
res = GST_RTSP_EPARSE;
read_string (versionstr, sizeof (versionstr), &bptr);
if (*bptr != '\0')
res = GST_RTSP_EPARSE;
if (strcmp (versionstr, "RTSP/1.0") == 0) {
if (gst_rtsp_message_init_request (msg, method, urlstr) != GST_RTSP_OK)
res = GST_RTSP_EPARSE;
} else if (strncmp (versionstr, "RTSP/", 5) == 0) {
if (gst_rtsp_message_init_request (msg, method, urlstr) != GST_RTSP_OK)
res = GST_RTSP_EPARSE;
msg->type_data.request.version = GST_RTSP_VERSION_INVALID;
} else {
gst_rtsp_message_init_request (msg, method, urlstr);
msg->type_data.request.version = GST_RTSP_VERSION_INVALID;
res = GST_RTSP_EPARSE;
}
return res;
}
/* parsing lines means reading a Key: Value pair */
static GstRTSPResult
parse_line (gchar * buffer, GstRTSPMessage * msg)
{
gchar key[32];
gchar *bptr;
GstRTSPHeaderField field;
bptr = buffer;
/* read key */
read_key (key, sizeof (key), &bptr);
if (*bptr != ':')
goto no_column;
bptr++;
field = gst_rtsp_find_header_field (key);
if (field != GST_RTSP_HDR_INVALID) {
while (g_ascii_isspace (*bptr))
bptr++;
gst_rtsp_message_add_header (msg, field, bptr);
}
return GST_RTSP_OK;
no_column:
{
return GST_RTSP_EPARSE;
}
}
/**
* gst_rtsp_connection_read_internal:
* @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.
*
* Returns: #GST_RTSP_OK on success.
*/
static GstRTSPResult
gst_rtsp_connection_read_internal (GstRTSPConnection * conn, guint8 * data,
guint size, GTimeVal * timeout, gboolean allow_interrupt)
{
guint toread;
gint retval;
GstClockTime to;
FIONREAD_TYPE avail;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (data != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (conn->fd.fd >= 0, GST_RTSP_EINVAL);
if (size == 0)
return GST_RTSP_OK;
toread = size;
/* 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_fd_ctl_write (conn->fdset, &conn->fd, FALSE);
gst_poll_fd_ctl_read (conn->fdset, &conn->fd, TRUE);
while (toread > 0) {
gint bytes;
do {
retval = gst_poll_wait (conn->fdset, to);
} while (retval == -1 && (errno == EINTR || errno == EAGAIN));
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;
}
}
return GST_RTSP_OK;
/* ERRORS */
select_error:
{
return GST_RTSP_ESYS;
}
select_timeout:
{
return GST_RTSP_ETIMEOUT;
}
stopped:
{
return GST_RTSP_EINTR;
}
eof:
{
return GST_RTSP_EEOF;
}
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
* @message: the message to read
* @timeout: a timeout value or #NULL
*
* Attempt to read into @message 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_receive (GstRTSPConnection * conn, GstRTSPMessage * message,
GTimeVal * timeout)
{
gchar buffer[4096];
gint line;
glong content_length;
GstRTSPResult res;
gboolean need_body;
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);
size = GUINT16_FROM_BE (size);
/* and read the body */
res = read_body (conn, size, message, timeout);
need_body = FALSE;
break;
} else {
gint offset = 0;
/* 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);
if (buffer[0] == '\0')
break;
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);
}
}
line++;
}
/* 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);
}
/* 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;
}
}
/* make sure to not overflow */
strncpy (conn->session_id, session_id, maxlen);
conn->session_id[maxlen] = '\0';
}
}
return res;
read_error:
{
return res;
}
}
/**
* gst_rtsp_connection_close:
* @conn: a #GstRTSPConnection
*
* Close the connected @conn.
*
* Returns: #GST_RTSP_OK on success.
*/
GstRTSPResult
gst_rtsp_connection_close (GstRTSPConnection * conn)
{
gint res;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_free (conn->ip);
conn->ip = NULL;
if (conn->fd.fd != -1) {
gst_poll_remove_fd (conn->fdset, &conn->fd);
res = CLOSE_SOCKET (conn->fd.fd);
conn->fd.fd = -1;
#ifdef G_OS_WIN32
WSACleanup ();
#endif
if (res != 0)
goto sys_error;
}
return GST_RTSP_OK;
sys_error:
{
return GST_RTSP_ESYS;
}
}
/**
* gst_rtsp_connection_free:
* @conn: a #GstRTSPConnection
*
* Close and free @conn.
*
* Returns: #GST_RTSP_OK on success.
*/
GstRTSPResult
gst_rtsp_connection_free (GstRTSPConnection * conn)
{
GstRTSPResult res;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
res = gst_rtsp_connection_close (conn);
gst_poll_free (conn->fdset);
#ifdef G_OS_WIN32
WSACleanup ();
#endif
g_timer_destroy (conn->timer);
g_free (conn->username);
g_free (conn->passwd);
gst_rtsp_connection_clear_auth_params (conn);
g_free (conn);
return res;
}
/**
* gst_rtsp_connection_poll:
* @conn: a #GstRTSPConnection
* @events: a bitmask of #GstRTSPEvent flags to check
* @revents: location for result flags
* @timeout: a timeout
*
* Wait up to the specified @timeout for the connection to become available for
* at least one of the operations specified in @events. When the function returns
* with #GST_RTSP_OK, @revents will contain a bitmask of available operations on
* @conn.
*
* @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.
*
* Since: 0.10.15
*/
GstRTSPResult
gst_rtsp_connection_poll (GstRTSPConnection * conn, GstRTSPEvent events,
GstRTSPEvent * revents, GTimeVal * timeout)
{
GstClockTime to;
gint retval;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (events != 0, GST_RTSP_EINVAL);
g_return_val_if_fail (revents != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (conn->fd.fd >= 0, GST_RTSP_EINVAL);
gst_poll_set_controllable (conn->fdset, TRUE);
/* add fd to writer set when asked to */
gst_poll_fd_ctl_write (conn->fdset, &conn->fd, events & GST_RTSP_EV_WRITE);
/* add fd to reader set when asked to */
gst_poll_fd_ctl_read (conn->fdset, &conn->fd, events & GST_RTSP_EV_READ);
/* configure timeout if any */
to = timeout ? GST_TIMEVAL_TO_TIME (*timeout) : GST_CLOCK_TIME_NONE;
do {
retval = gst_poll_wait (conn->fdset, to);
} while (retval == -1 && (errno == EINTR || errno == EAGAIN));
if (retval == 0)
goto select_timeout;
if (retval == -1) {
if (errno == EBUSY)
goto stopped;
else
goto select_error;
}
*revents = 0;
if (events & GST_RTSP_EV_READ) {
if (gst_poll_fd_can_read (conn->fdset, &conn->fd))
*revents |= GST_RTSP_EV_READ;
}
if (events & GST_RTSP_EV_WRITE) {
if (gst_poll_fd_can_write (conn->fdset, &conn->fd))
*revents |= GST_RTSP_EV_WRITE;
}
return GST_RTSP_OK;
/* ERRORS */
select_timeout:
{
return GST_RTSP_ETIMEOUT;
}
select_error:
{
return GST_RTSP_ESYS;
}
stopped:
{
return GST_RTSP_EINTR;
}
}
/**
* gst_rtsp_connection_next_timeout:
* @conn: a #GstRTSPConnection
* @timeout: a timeout
*
* Calculate the next timeout for @conn, storing the result in @timeout.
*
* Returns: #GST_RTSP_OK.
*/
GstRTSPResult
gst_rtsp_connection_next_timeout (GstRTSPConnection * conn, GTimeVal * timeout)
{
gdouble elapsed;
glong sec;
gulong usec;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (timeout != NULL, GST_RTSP_EINVAL);
elapsed = g_timer_elapsed (conn->timer, &usec);
if (elapsed >= conn->timeout) {
sec = 0;
usec = 0;
} else {
sec = conn->timeout - elapsed;
}
timeout->tv_sec = sec;
timeout->tv_usec = usec;
return GST_RTSP_OK;
}
/**
* gst_rtsp_connection_reset_timeout:
* @conn: a #GstRTSPConnection
*
* Reset the timeout of @conn.
*
* Returns: #GST_RTSP_OK.
*/
GstRTSPResult
gst_rtsp_connection_reset_timeout (GstRTSPConnection * conn)
{
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_timer_start (conn->timer);
return GST_RTSP_OK;
}
/**
* gst_rtsp_connection_flush:
* @conn: a #GstRTSPConnection
* @flush: start or stop the flush
*
* Start or stop the flushing action on @conn. When flushing, all current
* and future actions on @conn will return #GST_RTSP_EINTR until the connection
* is set to non-flushing mode again.
*
* Returns: #GST_RTSP_OK.
*/
GstRTSPResult
gst_rtsp_connection_flush (GstRTSPConnection * conn, gboolean flush)
{
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
gst_poll_set_flushing (conn->fdset, flush);
return GST_RTSP_OK;
}
/**
* gst_rtsp_connection_set_auth:
* @conn: a #GstRTSPConnection
* @method: authentication method
* @user: the user
* @pass: the password
*
* Configure @conn for authentication mode @method with @user and @pass as the
* user and password respectively.
*
* Returns: #GST_RTSP_OK.
*/
GstRTSPResult
gst_rtsp_connection_set_auth (GstRTSPConnection * conn,
GstRTSPAuthMethod method, const gchar * user, const gchar * pass)
{
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
if (method == GST_RTSP_AUTH_DIGEST && ((user == NULL || pass == NULL)
|| g_strrstr (user, ":") != NULL))
return GST_RTSP_EINVAL;
/* Make sure the username and passwd are being set for authentication */
if (method == GST_RTSP_AUTH_NONE && (user == NULL || pass == NULL))
return GST_RTSP_EINVAL;
/* ":" chars are not allowed in usernames for basic auth */
if (method == GST_RTSP_AUTH_BASIC && g_strrstr (user, ":") != NULL)
return GST_RTSP_EINVAL;
g_free (conn->username);
g_free (conn->passwd);
conn->auth_method = method;
conn->username = g_strdup (user);
conn->passwd = g_strdup (pass);
return GST_RTSP_OK;
}
/**
* str_case_hash:
* @key: ASCII string to hash
*
* Hashes @key in a case-insensitive manner.
*
* Returns: the hash code.
**/
static guint
str_case_hash (gconstpointer key)
{
const char *p = key;
guint h = g_ascii_toupper (*p);
if (h)
for (p += 1; *p != '\0'; p++)
h = (h << 5) - h + g_ascii_toupper (*p);
return h;
}
/**
* str_case_equal:
* @v1: an ASCII string
* @v2: another ASCII string
*
* Compares @v1 and @v2 in a case-insensitive manner
*
* Returns: %TRUE if they are equal (modulo case)
**/
static gboolean
str_case_equal (gconstpointer v1, gconstpointer v2)
{
const char *string1 = v1;
const char *string2 = v2;
return g_ascii_strcasecmp (string1, string2) == 0;
}
/**
* gst_rtsp_connection_set_auth_param:
* @conn: a #GstRTSPConnection
* @param: authentication directive
* @value: value
*
* Setup @conn with authentication directives. This is not necesary for
* methods #GST_RTSP_AUTH_NONE and #GST_RTSP_AUTH_BASIC. For
* #GST_RTSP_AUTH_DIGEST, directives should be taken from the digest challenge
* in the WWW-Authenticate response header and can include realm, domain,
* nonce, opaque, stale, algorithm, qop as per RFC2617.
*
* Since: 0.10.20
*/
void
gst_rtsp_connection_set_auth_param (GstRTSPConnection * conn,
const gchar * param, const gchar * value)
{
g_return_if_fail (conn != NULL);
g_return_if_fail (param != NULL);
if (conn->auth_params == NULL) {
conn->auth_params =
g_hash_table_new_full (str_case_hash, str_case_equal, g_free, g_free);
}
g_hash_table_insert (conn->auth_params, g_strdup (param), g_strdup (value));
}
/**
* gst_rtsp_connection_clear_auth_params:
* @conn: a #GstRTSPConnection
*
* Clear the list of authentication directives stored in @conn.
*
* Since: 0.10.20
*/
void
gst_rtsp_connection_clear_auth_params (GstRTSPConnection * conn)
{
g_return_if_fail (conn != NULL);
if (conn->auth_params != NULL) {
g_hash_table_destroy (conn->auth_params);
conn->auth_params = NULL;
}
}
/**
* gst_rtsp_connection_set_qos_dscp:
* @conn: a #GstRTSPConnection
* @qos_dscp: DSCP value
*
* Configure @conn to use the specified DSCP value.
*
* Returns: #GST_RTSP_OK on success.
*
* Since: 0.10.20
*/
GstRTSPResult
gst_rtsp_connection_set_qos_dscp (GstRTSPConnection * conn, guint qos_dscp)
{
struct sockaddr_storage sa_s;
socklen_t sa_sl = sizeof (sa_s);
gint af;
gint tos;
g_return_val_if_fail (conn != NULL, GST_RTSP_EINVAL);
g_return_val_if_fail (conn->fd.fd >= 0, GST_RTSP_EINVAL);
if (getsockname (conn->fd.fd, (struct sockaddr *) &sa_s, &sa_sl) < 0)
goto no_getsockname;
af = sa_s.ss_family;
/* if this is an IPv4-mapped address then do IPv4 QoS */
if (af == AF_INET6) {
struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *) &sa_s;
if (IN6_IS_ADDR_V4MAPPED (&saddr6->sin6_addr))
af = AF_INET;
}
/* extract and shift 6 bits of the DSCP */
tos = (qos_dscp & 0x3f) << 2;
switch (af) {
case AF_INET:
if (SETSOCKOPT (conn->fd.fd, IPPROTO_IP, IP_TOS, &tos, sizeof (tos)) < 0)
goto no_setsockopt;
break;
case AF_INET6:
#ifdef IPV6_TCLASS
if (SETSOCKOPT (conn->fd.fd, IPPROTO_IPV6, IPV6_TCLASS, &tos,
sizeof (tos)) < 0)
goto no_setsockopt;
break;
#endif
default:
goto wrong_family;
}
return GST_RTSP_OK;
/* ERRORS */
no_getsockname:
no_setsockopt:
{
return GST_RTSP_ESYS;
}
wrong_family:
{
return GST_RTSP_ERROR;
}
}
/**
* gst_rtsp_connection_get_ip:
* @conn: a #GstRTSPConnection
*
* Retrieve the IP address of the other end of @conn.
*
* Returns: The IP address as a string. this value remains valid until the
* connection is closed.
*
* Since: 0.10.20
*/
const gchar *
gst_rtsp_connection_get_ip (const GstRTSPConnection * conn)
{
g_return_val_if_fail (conn != NULL, NULL);
return conn->ip;
}
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