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/* -------------------------- netdist --------------------------------------- */
/* */
/* Distributes incoming data to a changeable list of netreceive objects. */
/* Uses child thread to connect to clients. Thus needs pd0.35-test17 or later. */
/* Written by Olaf Matthes (olaf.matthes@gmx.de) */
/* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */
/* */
/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* */
/* Based on PureData by Miller Puckette and others. */
/* */
/* ---------------------------------------------------------------------------- */
#include "m_pd.h"
#include <sys/types.h>
#include <string.h>
#include <pthread.h>
#ifdef WIN32
#include <winsock.h>
#else
#include <sys/socket.h>
#include <sys/errno.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>
#define SOCKET_ERROR -1
#endif
#define MAX_REC 32
static char *version = "netdist v0.1, written by Olaf Matthes <olaf.matthes@gmx.de>";
static t_class *netdist_class;
typedef struct _netdist
{
t_object x_obj;
t_clock *x_clock;
int x_fd[MAX_REC];
char *x_hostname[MAX_REC];
int x_numconnect;
int x_port[MAX_REC];
int x_protocol;
/* multithread stuff */
pthread_t x_threadid; /* id of child thread */
pthread_attr_t x_threadattr; /* attributes of child thread */
} t_netdist;
static void sys_sockerror(char *s)
{
#ifdef WIN32
int err = WSAGetLastError();
if (err == 10054) return;
#else
int err = errno;
#endif
post("%s: %s (%d)\n", s, strerror(err), err);
}
static void sys_closesocket(int fd) {
#ifdef WIN32
closesocket(fd);
#else
close(fd);
#endif
}
static void netdist_tick(t_netdist *x)
{
outlet_float(x->x_obj.ob_outlet, x->x_numconnect + 1);
}
static void *netdist_new(t_floatarg udpflag)
{
int i;
t_netdist *x = (t_netdist *)pd_new(netdist_class);
outlet_new(&x->x_obj, &s_float);
x->x_clock = clock_new(x, (t_method)netdist_tick);
for(i = 0; i < MAX_REC; i++)x->x_fd[i] = -1;
x->x_numconnect = -1;
x->x_protocol = (udpflag != 0 ? SOCK_DGRAM : SOCK_STREAM);
/* prepare child thread */
if(pthread_attr_init(&x->x_threadattr) < 0)
post("netdist: warning: could not prepare child thread" );
if(pthread_attr_setdetachstate(&x->x_threadattr, PTHREAD_CREATE_DETACHED) < 0)
post("netdist: warning: could not prepare child thread" );
return (x);
}
static void *netdist_child_connect(void *w)
{
int i;
t_netdist *x = (t_netdist*) w;
struct sockaddr_in server;
struct hostent *hp;
int sockfd;
int portno;
i = x->x_numconnect + 1;
portno = x->x_port[i];
/* create a socket */
sockfd = socket(AF_INET, x->x_protocol, 0);
#if 0
fprintf(stderr, "send socket %d\n", sockfd);
#endif
if (sockfd < 0)
{
sys_sockerror("socket");
return (x);
}
/* connect socket using hostname provided in command line */
server.sin_family = AF_INET;
hp = gethostbyname(x->x_hostname[i]);
if (hp == 0)
{
post("bad host?\n");
return (x);
}
memcpy((char *)&server.sin_addr, (char *)hp->h_addr, hp->h_length);
/* assign client port number */
server.sin_port = htons((u_short)portno);
post("connecting to port %d", portno);
/* try to connect */
if (connect(sockfd, (struct sockaddr *) &server, sizeof (server)) < 0)
{
sys_sockerror("connecting stream socket");
sys_closesocket(sockfd);
return (x);
}
x->x_fd[i] = sockfd;
/* outlet_float is not threadsafe ! */
// outlet_float(x->x_obj.ob_outlet, 1);
x->x_numconnect++; /* count connection */
/* use callback instead to set outlet */
clock_delay(x->x_clock, 0);
return (x);
}
static void netdist_connect(t_netdist *x, t_symbol *hostname,
t_floatarg fportno)
{
int i;
/* we get hostname and port and pass them on
to the child thread that establishes the connection */
for(i = 0; i <= x->x_numconnect; i++)
{ /* check if we are already connected */
if (hostname->s_name == x->x_hostname[i] && fportno == x->x_port[i])
{
error("netdist_connect: already connected");
return;
}
}
x->x_hostname[x->x_numconnect + 1] = hostname->s_name;
x->x_port[x->x_numconnect + 1] = fportno;
/* start child thread */
if(pthread_create( &x->x_threadid, &x->x_threadattr, netdist_child_connect, x) < 0)
post("netdist: could not create new thread");
}
static void netdist_disconnect(t_netdist *x, t_symbol *hostname, t_floatarg port)
{
int i, j;
for(i = 0; i <= x->x_numconnect; i++)
{
if((hostname->s_name == x->x_hostname[i]) && ((int)port == x->x_port[i]))
{
/* search for connection */
if (x->x_fd[i] >= 0)
{
sys_closesocket(x->x_fd[i]);
x->x_fd[i] = -1;
x->x_numconnect--;
outlet_float(x->x_obj.ob_outlet, x->x_numconnect + 1);
for(j = i; j <= x->x_numconnect; j++)
{
x->x_hostname[j] = x->x_hostname[j + 1];
x->x_port[j] = x->x_port[j + 1];
x->x_fd[j] = x->x_fd[j + 1];
}
}
}
}
}
static void netdist_send(t_netdist *x, t_symbol *s, int argc, t_atom *argv)
{
int i = 0;
for(i = 0; i <= x->x_numconnect; i++)
{
if (x->x_fd[i] >= 0)
{
t_binbuf *b = binbuf_new();
char *buf, *bp;
int length, sent;
t_atom at;
binbuf_add(b, argc, argv);
SETSEMI(&at);
binbuf_add(b, 1, &at);
binbuf_gettext(b, &buf, &length);
for (bp = buf, sent = 0; sent < length;)
{
static double lastwarntime;
static double pleasewarn;
double timebefore = clock_getlogicaltime();
int res = send(x->x_fd[i], buf, length-sent, 0);
double timeafter = clock_getlogicaltime();
int late = (timeafter - timebefore > 0.005);
if (late || pleasewarn)
{
if (timeafter > lastwarntime + 2)
{
post("netdist blocked %d msec",
(int)(1000 * ((timeafter - timebefore) + pleasewarn)));
pleasewarn = 0;
lastwarntime = timeafter;
}
else if (late) pleasewarn += timeafter - timebefore;
}
if (res <= 0)
{
sys_sockerror("netdist");
netdist_disconnect(x, gensym(x->x_hostname[i]), x->x_port[i]);
break;
}
else
{
sent += res;
bp += res;
}
}
t_freebytes(buf, length);
binbuf_free(b);
}
}
if(x->x_numconnect == -1) error("netdist: not connected");
}
/* disconnect all */
static void netdist_clear(t_netdist *x)
{
int i, j, n;
n = x->x_numconnect;
for (i = n; i >= 0; i--)
{
netdist_disconnect(x, gensym(x->x_hostname[i]), x->x_port[i]);
}
}
static void netdist_print(t_netdist *x)
{
int i;
post("netdist: %d connection(s) established:", x->x_numconnect + 1);
for (i = x->x_numconnect; i >= 0; i--)
{
post(" \"%s\", port %d",x->x_hostname[i], x->x_port[i]);
}
}
static void netdist_free(t_netdist *x)
{
netdist_clear(x);
clock_free(x->x_clock);
}
#ifndef MAXLIB
void netdist_setup(void)
{
netdist_class = class_new(gensym("netdist"), (t_newmethod)netdist_new,
(t_method)netdist_free, sizeof(t_netdist), 0, A_DEFFLOAT, 0);
class_addmethod(netdist_class, (t_method)netdist_connect, gensym("connect"), A_SYMBOL, A_FLOAT, 0);
class_addmethod(netdist_class, (t_method)netdist_disconnect, gensym("disconnect"), A_SYMBOL, A_FLOAT, 0);
class_addmethod(netdist_class, (t_method)netdist_send, gensym("send"), A_GIMME, 0);
class_addmethod(netdist_class, (t_method)netdist_clear, gensym("clear"), 0);
class_addmethod(netdist_class, (t_method)netdist_print, gensym("print"), 0);
post(version);
}
#else
void maxlib_netdist_setup(void)
{
netdist_class = class_new(gensym("maxlib_netdist"), (t_newmethod)netdist_new,
(t_method)netdist_free, sizeof(t_netdist), 0, A_DEFFLOAT, 0);
class_addcreator((t_newmethod)netdist_new, gensym("netdist"), A_DEFFLOAT, 0);
class_addmethod(netdist_class, (t_method)netdist_connect, gensym("connect"), A_SYMBOL, A_FLOAT, 0);
class_addmethod(netdist_class, (t_method)netdist_disconnect, gensym("disconnect"), A_SYMBOL, A_FLOAT, 0);
class_addmethod(netdist_class, (t_method)netdist_send, gensym("send"), A_GIMME, 0);
class_addmethod(netdist_class, (t_method)netdist_clear, gensym("clear"), 0);
class_addmethod(netdist_class, (t_method)netdist_print, gensym("print"), 0);
class_sethelpsymbol(netdist_class, gensym("maxlib/netdist-help.pd"));
}
#endif
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