diff options
Diffstat (limited to 'gst/tcp/gsttcp.c')
| -rw-r--r-- | gst/tcp/gsttcp.c | 569 |
1 files changed, 0 insertions, 569 deletions
diff --git a/gst/tcp/gsttcp.c b/gst/tcp/gsttcp.c deleted file mode 100644 index 5e8aae7c..00000000 --- a/gst/tcp/gsttcp.c +++ /dev/null @@ -1,569 +0,0 @@ -/* GStreamer - * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> - * Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org> - * - * gsttcp.c: TCP functions - * - * 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. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <netdb.h> -#include <unistd.h> -#include <sys/ioctl.h> - -#ifdef HAVE_FIONREAD_IN_SYS_FILIO -#include <sys/filio.h> -#endif - -#include "gsttcp.h" -#include <gst/gst-i18n-plugin.h> - -GST_DEBUG_CATEGORY_EXTERN (tcp_debug); -#define GST_CAT_DEFAULT tcp_debug - -#ifndef MSG_NOSIGNAL -#define MSG_NOSIGNAL 0 -#endif - -/* resolve host to IP address, throwing errors if it fails */ -/* host can already be an IP address */ -/* returns a newly allocated gchar * with the dotted ip address, - or NULL, in which case it already fired an error. */ -gchar * -gst_tcp_host_to_ip (GstElement * element, const gchar * host) -{ - struct hostent *hostinfo; - char **addrs; - gchar *ip; - struct in_addr addr; - - GST_DEBUG_OBJECT (element, "resolving host %s", host); - - /* first check if it already is an IP address */ - if (inet_aton (host, &addr)) { - ip = g_strdup (host); - goto beach; - } - /* FIXME: could do a localhost check here */ - - /* perform a name lookup */ - if (!(hostinfo = gethostbyname (host))) - goto resolve_error; - - if (hostinfo->h_addrtype != AF_INET) - goto not_ip; - - addrs = hostinfo->h_addr_list; - - /* There could be more than one IP address, but we just return the first */ - ip = g_strdup (inet_ntoa (*(struct in_addr *) *addrs)); - -beach: - GST_DEBUG_OBJECT (element, "resolved to IP %s", ip); - return ip; - -resolve_error: - { - GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND, (NULL), - ("Could not find IP address for host \"%s\".", host)); - return NULL; - } -not_ip: - { - GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND, (NULL), - ("host \"%s\" is not an IP host", host)); - return NULL; - } -} - -/* write buffer to given socket incrementally. - * Returns number of bytes written. - */ -gint -gst_tcp_socket_write (int socket, const void *buf, size_t count) -{ - size_t bytes_written = 0; - - while (bytes_written < count) { - ssize_t wrote = send (socket, (const char *) buf + bytes_written, - count - bytes_written, MSG_NOSIGNAL); - - if (wrote <= 0) { - GST_WARNING ("error while writing"); - return bytes_written; - } - bytes_written += wrote; - } - - GST_LOG ("wrote %" G_GSIZE_FORMAT " bytes succesfully", bytes_written); - return bytes_written; -} - -/* atomically read count bytes into buf, cancellable. return val of GST_FLOW_OK - * indicates success, anything else is failure. - */ -static GstFlowReturn -gst_tcp_socket_read (GstElement * this, int socket, void *buf, size_t count, - GstPoll * fdset) -{ - ssize_t n; - size_t bytes_read; - int num_to_read; - int ret; - - bytes_read = 0; - - while (bytes_read < count) { - /* do a blocking select on the socket */ - /* no action (0) is an error too in our case */ - if ((ret = gst_poll_wait (fdset, GST_CLOCK_TIME_NONE)) <= 0) { - if (ret == -1 && errno == EBUSY) - goto cancelled; - else - goto select_error; - } - - /* ask how much is available for reading on the socket */ - if (ioctl (socket, FIONREAD, &num_to_read) < 0) - goto ioctl_error; - - if (num_to_read == 0) - goto got_eos; - - /* sizeof(ssize_t) >= sizeof(int), so I know num_to_read <= SSIZE_MAX */ - - num_to_read = MIN (num_to_read, count - bytes_read); - - n = read (socket, ((guint8 *) buf) + bytes_read, num_to_read); - - if (n < 0) - goto read_error; - - if (n < num_to_read) - goto short_read; - - bytes_read += num_to_read; - } - - return GST_FLOW_OK; - - /* ERRORS */ -select_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("select failed: %s", g_strerror (errno))); - return GST_FLOW_ERROR; - } -cancelled: - { - GST_DEBUG_OBJECT (this, "Select was cancelled"); - return GST_FLOW_WRONG_STATE; - } -ioctl_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("ioctl failed: %s", g_strerror (errno))); - return GST_FLOW_ERROR; - } -got_eos: - { - GST_DEBUG_OBJECT (this, "Got EOS on socket stream"); - return GST_FLOW_UNEXPECTED; - } -read_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("read failed: %s", g_strerror (errno))); - return GST_FLOW_ERROR; - } -short_read: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("short read: wanted %d bytes, got %" G_GSSIZE_FORMAT, num_to_read, n)); - return GST_FLOW_ERROR; - } -} - -/* close the socket and reset the fd. Used to clean up after errors. */ -void -gst_tcp_socket_close (GstPollFD * socket) -{ - if (socket->fd >= 0) { - close (socket->fd); - socket->fd = -1; - } -} - -/* read a buffer from the given socket - * returns: - * - a GstBuffer in which data should be read - * - NULL, indicating a connection close or an error, to be handled with - * EOS - */ -GstFlowReturn -gst_tcp_read_buffer (GstElement * this, int socket, GstPoll * fdset, - GstBuffer ** buf) -{ - int ret; - ssize_t bytes_read; - int readsize; - - *buf = NULL; - - /* do a blocking select on the socket */ - /* no action (0) is an error too in our case */ - if ((ret = gst_poll_wait (fdset, GST_CLOCK_TIME_NONE)) <= 0) { - if (ret == -1 && errno == EBUSY) - goto cancelled; - else - goto select_error; - } - - /* ask how much is available for reading on the socket */ - if ((ret = ioctl (socket, FIONREAD, &readsize)) < 0) - goto ioctl_error; - - if (readsize == 0) - goto got_eos; - - /* sizeof(ssize_t) >= sizeof(int), so I know readsize <= SSIZE_MAX */ - - *buf = gst_buffer_new_and_alloc (readsize); - - bytes_read = read (socket, GST_BUFFER_DATA (*buf), readsize); - - if (bytes_read < 0) - goto read_error; - - if (bytes_read < readsize) - /* but mom, you promised to give me readsize bytes! */ - goto short_read; - - GST_LOG_OBJECT (this, "returning buffer of size %d", GST_BUFFER_SIZE (*buf)); - return GST_FLOW_OK; - - /* ERRORS */ -select_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("select failed: %s", g_strerror (errno))); - return GST_FLOW_ERROR; - } -cancelled: - { - GST_DEBUG_OBJECT (this, "Select was cancelled"); - return GST_FLOW_WRONG_STATE; - } -ioctl_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("ioctl failed: %s", g_strerror (errno))); - return GST_FLOW_ERROR; - } -got_eos: - { - GST_DEBUG_OBJECT (this, "Got EOS on socket stream"); - return GST_FLOW_UNEXPECTED; - } -read_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("read failed: %s", g_strerror (errno))); - gst_buffer_unref (*buf); - *buf = NULL; - return GST_FLOW_ERROR; - } -short_read: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("short read: wanted %d bytes, got %" G_GSSIZE_FORMAT, readsize, - bytes_read)); - gst_buffer_unref (*buf); - *buf = NULL; - return GST_FLOW_ERROR; - } -} - -/* read a buffer from the given socket - * returns: - * - a GstBuffer in which data should be read - * - NULL, indicating a connection close or an error, to be handled with - * EOS - */ -GstFlowReturn -gst_tcp_gdp_read_buffer (GstElement * this, int socket, GstPoll * fdset, - GstBuffer ** buf) -{ - GstFlowReturn ret; - guint8 *header = NULL; - - GST_LOG_OBJECT (this, "Reading %d bytes for buffer packet header", - GST_DP_HEADER_LENGTH); - - *buf = NULL; - header = g_malloc (GST_DP_HEADER_LENGTH); - - ret = gst_tcp_socket_read (this, socket, header, GST_DP_HEADER_LENGTH, fdset); - - if (ret != GST_FLOW_OK) - goto header_read_error; - - if (!gst_dp_validate_header (GST_DP_HEADER_LENGTH, header)) - goto validate_error; - - if (gst_dp_header_payload_type (header) != GST_DP_PAYLOAD_BUFFER) - goto is_not_buffer; - - GST_LOG_OBJECT (this, "validated buffer packet header"); - - *buf = gst_dp_buffer_from_header (GST_DP_HEADER_LENGTH, header); - - g_free (header); - - ret = gst_tcp_socket_read (this, socket, GST_BUFFER_DATA (*buf), - GST_BUFFER_SIZE (*buf), fdset); - - if (ret != GST_FLOW_OK) - goto data_read_error; - - return GST_FLOW_OK; - - /* ERRORS */ -header_read_error: - { - g_free (header); - return ret; - } -validate_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("GDP buffer packet header does not validate")); - g_free (header); - return GST_FLOW_ERROR; - } -is_not_buffer: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("GDP packet contains something that is not a buffer (type %d)", - gst_dp_header_payload_type (header))); - g_free (header); - return GST_FLOW_ERROR; - } -data_read_error: - { - gst_buffer_unref (*buf); - *buf = NULL; - return ret; - } -} - -GstFlowReturn -gst_tcp_gdp_read_caps (GstElement * this, int socket, GstPoll * fdset, - GstCaps ** caps) -{ - GstFlowReturn ret; - guint8 *header = NULL; - guint8 *payload = NULL; - size_t payload_length; - - GST_LOG_OBJECT (this, "Reading %d bytes for caps packet header", - GST_DP_HEADER_LENGTH); - - *caps = NULL; - header = g_malloc (GST_DP_HEADER_LENGTH); - - ret = gst_tcp_socket_read (this, socket, header, GST_DP_HEADER_LENGTH, fdset); - - if (ret != GST_FLOW_OK) - goto header_read_error; - - if (!gst_dp_validate_header (GST_DP_HEADER_LENGTH, header)) - goto header_validate_error; - - if (gst_dp_header_payload_type (header) != GST_DP_PAYLOAD_CAPS) - goto is_not_caps; - - GST_LOG_OBJECT (this, "validated caps packet header"); - - payload_length = gst_dp_header_payload_length (header); - payload = g_malloc (payload_length); - - GST_LOG_OBJECT (this, - "Reading %" G_GSIZE_FORMAT " bytes for caps packet payload", - payload_length); - - ret = gst_tcp_socket_read (this, socket, payload, payload_length, fdset); - - if (ret != GST_FLOW_OK) - goto payload_read_error; - - if (!gst_dp_validate_payload (GST_DP_HEADER_LENGTH, header, payload)) - goto payload_validate_error; - - *caps = gst_dp_caps_from_packet (GST_DP_HEADER_LENGTH, header, payload); - - GST_DEBUG_OBJECT (this, "Got caps over GDP: %" GST_PTR_FORMAT, *caps); - - g_free (header); - g_free (payload); - - return GST_FLOW_OK; - - /* ERRORS */ -header_read_error: - { - g_free (header); - return ret; - } -header_validate_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("GDP caps packet header does not validate")); - g_free (header); - return GST_FLOW_ERROR; - } -is_not_caps: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("GDP packet contains something that is not a caps (type %d)", - gst_dp_header_payload_type (header))); - g_free (header); - return GST_FLOW_ERROR; - } -payload_read_error: - { - g_free (header); - g_free (payload); - return ret; - } -payload_validate_error: - { - GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), - ("GDP caps packet payload does not validate")); - g_free (header); - g_free (payload); - return GST_FLOW_ERROR; - } -} - -/* write a GDP header to the socket. Return false if fails. */ -gboolean -gst_tcp_gdp_write_buffer (GstElement * this, int socket, GstBuffer * buffer, - gboolean fatal, const gchar * host, int port) -{ - guint length; - guint8 *header; - size_t wrote; - - if (!gst_dp_header_from_buffer (buffer, 0, &length, &header)) - goto create_error; - - GST_LOG_OBJECT (this, "writing %d bytes for GDP buffer header", length); - wrote = gst_tcp_socket_write (socket, header, length); - g_free (header); - - if (wrote != length) - goto write_error; - - return TRUE; - - /* ERRORS */ -create_error: - { - if (fatal) - GST_ELEMENT_ERROR (this, CORE, TOO_LAZY, (NULL), - ("Could not create GDP header from buffer")); - return FALSE; - } -write_error: - { - if (fatal) - GST_ELEMENT_ERROR (this, RESOURCE, WRITE, - (_("Error while sending data to \"%s:%d\"."), host, port), - ("Only %" G_GSIZE_FORMAT " of %u bytes written: %s", - wrote, GST_BUFFER_SIZE (buffer), g_strerror (errno))); - return FALSE; - } -} - -/* write GDP header and payload to the given socket for the given caps. - * Return false if fails. */ -gboolean -gst_tcp_gdp_write_caps (GstElement * this, int socket, const GstCaps * caps, - gboolean fatal, const char *host, int port) -{ - guint length; - guint8 *header; - guint8 *payload; - size_t wrote; - - if (!gst_dp_packet_from_caps (caps, 0, &length, &header, &payload)) - goto create_error; - - GST_LOG_OBJECT (this, "writing %d bytes for GDP caps header", length); - wrote = gst_tcp_socket_write (socket, header, length); - if (wrote != length) - goto write_header_error; - - length = gst_dp_header_payload_length (header); - g_free (header); - - GST_LOG_OBJECT (this, "writing %d bytes for GDP caps payload", length); - wrote = gst_tcp_socket_write (socket, payload, length); - g_free (payload); - - if (wrote != length) - goto write_payload_error; - - return TRUE; - - /* ERRORS */ -create_error: - { - if (fatal) - GST_ELEMENT_ERROR (this, CORE, TOO_LAZY, (NULL), - ("Could not create GDP packet from caps")); - return FALSE; - } -write_header_error: - { - g_free (header); - g_free (payload); - if (fatal) - GST_ELEMENT_ERROR (this, RESOURCE, WRITE, - (_("Error while sending gdp header data to \"%s:%d\"."), host, port), - ("Only %" G_GSIZE_FORMAT " of %u bytes written: %s", - wrote, length, g_strerror (errno))); - return FALSE; - } -write_payload_error: - { - if (fatal) - GST_ELEMENT_ERROR (this, RESOURCE, WRITE, - (_("Error while sending gdp payload data to \"%s:%d\"."), host, port), - ("Only %" G_GSIZE_FORMAT " of %u bytes written: %s", - wrote, length, g_strerror (errno))); - return FALSE; - } -} |