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/* udpsend.c
* copyright © 2010-2015 IOhannes m zmölnig, IEM
* copyright (c) 2006-2010 Martin Peach
* copyright (c) Miller Puckette
*/
/* */
/* A client for unidirectional communication from within Pd. */
/* */
/* 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, see */
/* http://www.gnu.org/licenses/ */
/* */
#define DEBUGLEVEL 1
static const char objName[] = "udpsend";
#include "iemnet.h"
#include <string.h>
static t_class *udpsend_class;
typedef struct _udpsend {
t_object x_obj;
t_iemnet_sender*x_sender;
int x_fd;
} t_udpsend;
static void udpsend_connect(t_udpsend *x, t_symbol *hostname,
t_floatarg fportno)
{
struct sockaddr_in server;
struct hostent *hp = NULL;
int sockfd;
int portno = fportno;
int broadcast = 1;/* nonzero is true */
memset(&server, 0, sizeof(server));
if (x->x_sender) {
iemnet_log(x, IEMNET_ERROR, "already connected");
return;
}
/* connect socket using hostname provided in command line */
server.sin_family = AF_INET;
hp = gethostbyname(hostname->s_name);
if (hp == 0) {
iemnet_log(x, IEMNET_ERROR, "bad host '%s'?", hostname->s_name);
return;
}
memcpy((char *)&server.sin_addr, (char *)hp->h_addr, hp->h_length);
/* assign client port number */
server.sin_port = htons((u_short)portno);
DEBUG("connecting to port %d", portno);
/* create a socket */
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
DEBUG("send socket %d\n", sockfd);
if (sockfd < 0) {
iemnet_log(x, IEMNET_ERROR, "unable to create datagram socket");
sys_sockerror("socket");
return;
}
/* Enable sending of broadcast messages (if hostname is a broadcast address)*/
#ifdef SO_BROADCAST
if( 0 != setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST,
(const void *)&broadcast, sizeof(broadcast))) {
iemnet_log(x, IEMNET_ERROR, "unable to switch to broadcast mode");
sys_sockerror("setsockopt:SO_BROADCAST");
}
#endif /* SO_BROADCAST */
/* try to connect. */
if (connect(sockfd, (struct sockaddr *) &server, sizeof (server)) < 0) {
iemnet_log(x, IEMNET_ERROR, "unable to connect to socket:%d", sockfd);
sys_sockerror("connect");
iemnet__closesocket(sockfd, 1);
return;
}
x->x_sender=iemnet__sender_create(sockfd, NULL, NULL, 0);
x->x_fd = sockfd;
outlet_float(x->x_obj.ob_outlet, 1);
}
static void udpsend_disconnect(t_udpsend *x)
{
if(x->x_sender) {
iemnet__sender_destroy(x->x_sender, 0);
}
x->x_sender=NULL;
if(x->x_fd >= 0) {
iemnet__closesocket(x->x_fd, 1);
x->x_fd=-1;
outlet_float(x->x_obj.ob_outlet, 0);
}
}
static void udpsend_send(t_udpsend *x, t_symbol *s, int argc, t_atom *argv)
{
if(x->x_sender) {
t_iemnet_chunk*chunk=iemnet__chunk_create_list(argc, argv);
iemnet__sender_send(x->x_sender, chunk);
iemnet__chunk_destroy(chunk);
} else {
iemnet_log(x, IEMNET_ERROR, "not connected");
}
}
static void udpsend_free(t_udpsend *x)
{
udpsend_disconnect(x);
}
static void *udpsend_new(void)
{
t_udpsend *x = (t_udpsend *)pd_new(udpsend_class);
outlet_new(&x->x_obj, gensym("float"));
x->x_sender=NULL;
x->x_fd=-1;
return (x);
}
IEMNET_EXTERN void udpsend_setup(void)
{
if(!iemnet__register(objName)) {
return;
}
udpsend_class = class_new(gensym(objName), (t_newmethod)udpsend_new,
(t_method)udpsend_free,
sizeof(t_udpsend), 0, 0);
class_addmethod(udpsend_class, (t_method)udpsend_connect,
gensym("connect"), A_SYMBOL, A_FLOAT, 0);
class_addmethod(udpsend_class, (t_method)udpsend_disconnect,
gensym("disconnect"), 0);
class_addmethod(udpsend_class, (t_method)udpsend_send, gensym("send"),
A_GIMME, 0);
class_addlist(udpsend_class, (t_method)udpsend_send);
DEBUGMETHOD(udpsend_class);
}
IEMNET_INITIALIZER(udpsend_setup);
/* end udpsend.c*/
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