From d41e58e6cd71fdacdca69ba78c29d42dc7d330d5 Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Wed, 20 Nov 2002 17:46:33 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r224, which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/maxlib/; revision=225 --- src/netdist.c | 304 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 304 insertions(+) create mode 100644 src/netdist.c (limited to 'src/netdist.c') diff --git a/src/netdist.c b/src/netdist.c new file mode 100644 index 0000000..4f91c2d --- /dev/null +++ b/src/netdist.c @@ -0,0 +1,304 @@ +/* -------------------------- 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 +#include +#include +#ifdef UNIX +#include +#include +#include +#include +#include +#include +#define SOCKET_ERROR -1 +#else +#include +#endif + +#define MAX_REC 32 + +static char *version = "netdist v0.1, written by Olaf Matthes "; + +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")); +} + + + -- cgit v1.2.1