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-rw-r--r--src/netdist.c304
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diff --git a/src/netdist.c b/src/netdist.c
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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 UNIX
+#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
+#else
+#include <winsock.h>
+#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 NT
+ int err = WSAGetLastError();
+ if (err == 10054) return;
+#endif
+#ifdef UNIX
+ int err = errno;
+#endif
+ post("%s: %s (%d)\n", s, strerror(err), err);
+}
+
+static void sys_closesocket(int fd) {
+
+#ifdef UNIX
+ close(fd);
+#endif
+#ifdef NT
+ closesocket(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);
+#ifndef MAXLIB
+ post(version);
+#endif
+ /* 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);
+}
+
+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);
+ class_sethelpsymbol(netdist_class, gensym("maxlib/help-netdist.pd"));
+}
+
+
+