Initial checkin of veejay 1.4

git-svn-id: svn://code.dyne.org/veejay/trunk@1172 eb8d1916-c9e9-0310-b8de-cf0c9472ead5

veejay-current/veejay-server/libvjnet/cmd.c

@@ -0,0 +1,266 @@
+/* vjnet - low level network I/O for VeeJay
+ *
+ *           (C) 2005 Niels Elburg <nwelburg@gmail.com> 
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include "cmd.h"
+#include <libvjmsg/vj-msg.h>
+#ifdef STRICT_CHECKING
+#include <assert.h>
+#endif
+vj_sock_t	*alloc_sock_t(void)
+{
+	vj_sock_t *s = (vj_sock_t*) malloc(sizeof(vj_sock_t));
+	if(!s) return NULL;
+	return s;
+}
+
+void		sock_t_free(vj_sock_t *s )
+{
+	if(s) free(s);
+}
+
+int			sock_t_connect( vj_sock_t *s, char *host, int port )
+{
+	s->he = gethostbyname( host );
+	if(s->he==NULL)
+		return 0;
+	s->sock_fd = socket( AF_INET, SOCK_STREAM , 0);
+	if(s->sock_fd < 0)
+	{
+		veejay_msg(VEEJAY_MSG_ERROR, "Socket error with Veejay host %s:%d %s ", host,port,strerror(errno));
+		return 0;
+	}
+	s->port_num = port;
+	s->addr.sin_family = AF_INET;
+	s->addr.sin_port   = htons( port );
+	s->addr.sin_addr   = *( (struct in_addr*) s->he->h_addr );	
+
+	if( connect( s->sock_fd, (struct sockaddr*) &s->addr,
+			sizeof( struct sockaddr )) == -1 )
+	{
+		veejay_msg(VEEJAY_MSG_ERROR, "Connection error with Veejay host %s:%d %s",
+				host, port, strerror(errno));
+		return 0;
+	}
+	unsigned int tmp = sizeof(int);
+	if( getsockopt( s->sock_fd , SOL_SOCKET, SO_SNDBUF, (unsigned char*) &(s->send_size), &tmp) < 0 )
+	{
+		veejay_msg(VEEJAY_MSG_ERROR, "Unable to get buffer size for output: %s", strerror(errno));
+		return 0;
+	}
+	if( getsockopt( s->sock_fd, SOL_SOCKET, SO_RCVBUF, (unsigned char*) &(s->recv_size), &tmp) < 0 )
+	{
+		veejay_msg(VEEJAY_MSG_ERROR, "Unable to get buffer size for input: %s", strerror(errno));
+		return 0;
+	}
+
+	return 1;
+}
+
+int			sock_t_poll_w(vj_sock_t *s )
+{
+	int	status;
+	fd_set	fds;
+	struct timeval no_wait;
+	memset( &no_wait, 0, sizeof(no_wait) );
+
+	FD_ZERO( &fds );
+	FD_SET( s->sock_fd, &fds );
+
+	status = select( s->sock_fd + 1,NULL, &fds, NULL, &no_wait );
+	if( status < 0 )
+	{
+		veejay_msg(VEEJAY_MSG_ERROR, "Unable to poll socket for immediate write: %s", strerror(errno));
+		return 0;
+	}
+	if( status == 0 )
+	{
+		veejay_msg(VEEJAY_MSG_ERROR, "Timeout occured");
+		return 0;
+	}
+
+	if( FD_ISSET( s->sock_fd, &fds ))
+	{
+		return 1;
+	}
+
+	return 0;
+}
+
+
+int			sock_t_poll( vj_sock_t *s )
+{
+	int	status;
+	fd_set	fds;
+	struct timeval no_wait;
+	memset( &no_wait, 0, sizeof(no_wait) );
+
+	FD_ZERO( &fds );
+	FD_SET( s->sock_fd, &fds );
+
+	status = select( s->sock_fd + 1, &fds, 0, 0, &no_wait );
+	if( status < 0 )
+	{
+		veejay_msg(VEEJAY_MSG_ERROR, "Unable to poll socket for immediate read: %s", strerror(errno));
+		return 0;
+	}
+	if( FD_ISSET( s->sock_fd, &fds ) )
+	{
+		return 1;
+	}
+	return 0;
+}
+
+int			sock_t_recv_w( vj_sock_t *s, void *dst, int len )
+{
+	int n = 0;
+	if( len < s->recv_size )
+	{
+		n = recv( s->sock_fd, dst, len, MSG_WAITALL );
+		if(n==-1)
+		{
+			veejay_msg(VEEJAY_MSG_ERROR, "%s", strerror(errno));
+			return -1;
+		}
+		return n;
+	}
+	else
+	{
+		int done = 0;
+		int bytes_left = s->recv_size;
+
+		while( done < len )
+		{
+			n = recv( s->sock_fd, dst + done,bytes_left,MSG_WAITALL );
+			if( n == -1)
+			{
+				veejay_msg(VEEJAY_MSG_ERROR, "%s",strerror(errno));
+				return -1;
+			}
+			done += n;
+			
+			if( (len-done) < s->recv_size)
+				bytes_left = len - done;
+		}
+		return done;
+	}
+	return 0;
+}
+
+int			sock_t_recv( vj_sock_t *s, void *dst, int len )
+{
+	int n = recv( s->sock_fd, dst, len , 0  );
+	if(n==-1)
+	{
+		veejay_msg(VEEJAY_MSG_ERROR, "%s", strerror(errno));
+		return -1;
+	}
+	return n;
+}
+
+int			sock_t_send( vj_sock_t *s, unsigned char *buf, int len )
+{
+	int n; 
+#ifdef STRICT_CHECKING
+	assert( buf != NULL );
+#endif
+	//@ send in reasonable chunks
+	if( len < s->send_size )
+	{
+		n = send(s->sock_fd,buf,len, 0 );
+		if( n == -1 )
+		{
+			veejay_msg(0, "Send error: %s",strerror(errno));
+			veejay_msg(0, "\t[%s], %d bytes", buf,len );
+			return 0;
+		}
+		return n;
+	}
+	else
+	{	
+		int done = 0;
+		int bs   = s->send_size;
+		while( done < len )
+		{
+			n = send( s->sock_fd, buf + done, bs , 0 );
+			if(n == -1)
+			{
+				veejay_msg(VEEJAY_MSG_ERROR, "TCP send error: %s", strerror(errno));
+				return 0;
+			}
+			done += n;
+		}
+		return done;
+	}
+	return 0;
+}
+
+int			sock_t_send_fd( int fd, int send_size, unsigned char *buf, int len )
+{
+	int n; 
+#ifdef STRICT_CHECKING
+	assert( buf != NULL );
+#endif
+	
+	//@ send in reasonable chunks
+	if( len < send_size )
+	{
+		n = send(fd,buf,len, 0 );
+		if( n == -1 )
+		{
+			veejay_msg(0, "Send error: %s",strerror(errno));
+			return 0;
+		}
+		return n;
+	}
+	else
+	{	
+		int done = 0;
+		int bytes_left = len;
+		while( done < len )
+		{
+			n = send( fd, buf + done, bytes_left , 0 );
+			if(n == -1)
+			{
+				veejay_msg(VEEJAY_MSG_ERROR, "TCP send error: %s", strerror(errno));
+				return 0;
+			}
+			bytes_left -= n;
+			done += n;
+		}
+#ifdef STRICT_CHECKING
+		assert( done == len );
+#endif
+		return done;
+	}
+	return 0;
+}
+
+void			sock_t_close( vj_sock_t *s )
+{
+	if(s)
+	{
+		close(s->sock_fd);
+	}
+}