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/netclient.c | 348 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 348 insertions(+) create mode 100644 src/netclient.c (limited to 'src/netclient.c') diff --git a/src/netclient.c b/src/netclient.c new file mode 100644 index 0000000..7ad252f --- /dev/null +++ b/src/netclient.c @@ -0,0 +1,348 @@ +/* -------------------------- netclient ------------------------------------- */ +/* */ +/* Extended 'netsend', connects to 'netserver'. */ +/* Uses child thread to connect to server. 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 STRBUF_SIZE 32 /* maximum numbers of characters to read */ +#define DEFPOLLTIME 20 /* check for input every 20 ms */ + +static char *version = "netclient v0.1, written by Olaf Matthes "; + +static t_class *netclient_class; + +typedef struct _netclient +{ + t_object x_obj; + t_clock *x_clock; + t_clock *x_poll; + t_outlet *x_outdata; + t_outlet *x_outconnect; + int x_fd; + char *x_hostname; + int x_connectstate; + int x_port; + int x_protocol; + /* multithread stuff */ + pthread_t x_threadid; /* id of child thread */ + pthread_attr_t x_threadattr; /* attributes of child thread */ +} t_netclient; + +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 netclient_tick(t_netclient *x) +{ + outlet_float(x->x_outconnect, 1); +} + +static void *netclient_child_connect(void *w) +{ + t_netclient *x = (t_netclient*) w; + struct sockaddr_in server; + struct hostent *hp; + int sockfd; + int portno = x->x_port; + if (x->x_fd >= 0) + { + error("netclient_connect: already connected"); + return (x); + } + + /* 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); + 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 = sockfd; + /* outlet_float is not threadsafe ! */ + // outlet_float(x->x_obj.ob_outlet, 1); + x->x_connectstate = 1; + /* use callback instead to set outlet */ + clock_delay(x->x_clock, 0); + return (x); +} + +static void netclient_connect(t_netclient *x, t_symbol *hostname, + t_floatarg fportno) +{ + /* we get hostname and port and pass them on + to the child thread that establishes the connection */ + x->x_hostname = hostname->s_name; + x->x_port = fportno; + x->x_connectstate = 0; + /* start child thread */ + if(pthread_create( &x->x_threadid, &x->x_threadattr, netclient_child_connect, x) < 0) + post("netclient: could not create new thread"); +} + +static void netclient_disconnect(t_netclient *x) +{ + if (x->x_fd >= 0) + { + sys_closesocket(x->x_fd); + x->x_fd = -1; + x->x_connectstate = 0; + outlet_float(x->x_outconnect, 0); + } +} + +static void netclient_send(t_netclient *x, t_symbol *s, int argc, t_atom *argv) +{ + if (x->x_fd >= 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 = sys_getrealtime(); + int res = send(x->x_fd, buf, length-sent, 0); + double timeafter = sys_getrealtime(); + int late = (timeafter - timebefore > 0.005); + if (late || pleasewarn) + { + if (timeafter > lastwarntime + 2) + { + post("netclient blocked %d msec", + (int)(1000 * ((timeafter - timebefore) + pleasewarn))); + pleasewarn = 0; + lastwarntime = timeafter; + } + else if (late) pleasewarn += timeafter - timebefore; + } + if (res <= 0) + { + sys_sockerror("netclient"); + netclient_disconnect(x); + break; + } + else + { + sent += res; + bp += res; + } + } + t_freebytes(buf, length); + binbuf_free(b); + } + else error("netclient: not connected"); +} + +static void netclient_rcv(t_netclient *x) +{ + int sockfd = x->x_fd; + int ret; + char resp[STRBUF_SIZE]; + fd_set readset; + fd_set exceptset; + struct timeval ztout; + /* output data */ + t_binbuf *binbuf; + t_atom messbuf[1024]; + int msg, natom; + t_atom *at; + int i; + + if(x->x_connectstate) + { + /* check if we can read/write from/to the socket */ + FD_ZERO(&readset); + FD_ZERO(&exceptset); + FD_SET(x->x_fd, &readset ); + FD_SET(x->x_fd, &exceptset ); + + ztout.tv_sec = 0; + ztout.tv_usec = 0; + + ret = select(sockfd+1, &readset, NULL, &exceptset, &ztout); + if(ret < 0) + { + error("netclient: can not read from socket"); + sys_closesocket(sockfd); + return; + } + if(FD_ISSET(sockfd, &readset) || FD_ISSET(sockfd, &exceptset)) + { + /* read from server */ + ret = recv(sockfd, resp, STRBUF_SIZE, 0); + if(ret > 0) + { + // post("netclient: received: %s, %d bytes, %d stringlen", resp, ret, strlen(resp)); + /* convert string into atoms using a binbuf */ + binbuf = binbuf_new(); + binbuf_text(binbuf, resp, ret); //strlen(resp)); + natom = binbuf_getnatom(binbuf); /* get number of atoms */ + at = binbuf_getvec(binbuf); /* get the atoms */ + /* now split it into several parts at every A_SEMI because + we probably received more than one message at a time */ + for (msg = 0; msg < natom;) + { + int emsg; + for (emsg = msg; emsg < natom && at[emsg].a_type != A_COMMA + && at[emsg].a_type != A_SEMI; emsg++); + + if (emsg > msg) + { + int ii; + for (ii = msg; ii < emsg; ii++) + if (at[ii].a_type == A_DOLLAR || at[ii].a_type == A_DOLLSYM) + { + pd_error(x, "netserver: -- got dollar sign in message"); + goto nodice; + } + if (at[msg].a_type == A_FLOAT) + { + if (emsg > msg + 1) + outlet_list(x->x_outdata, 0, emsg-msg, at + msg); + else outlet_float(x->x_outdata, at[msg].a_w.w_float); + } + else if (at[msg].a_type == A_SYMBOL) + outlet_anything(x->x_outdata, at[msg].a_w.w_symbol, + emsg-msg-1, at + msg + 1); + } + nodice: + msg = emsg + 1; + } + binbuf_free(binbuf); + } + else post("netclient: read() did not return any data"); + } + } + else post("netclient: not connected"); +} + +static void netclient_poll(t_netclient *x) +{ + if(x->x_connectstate) + netclient_rcv(x); /* try to read in case we're connected */ + clock_delay(x->x_poll, DEFPOLLTIME); /* see you later */ +} + +static void *netclient_new(t_floatarg udpflag) +{ + t_netclient *x = (t_netclient *)pd_new(netclient_class); + x->x_outdata = outlet_new(&x->x_obj, &s_anything); /* received data */ + x->x_outconnect = outlet_new(&x->x_obj, &s_float); /* connection state */ + x->x_clock = clock_new(x, (t_method)netclient_tick); + x->x_poll = clock_new(x, (t_method)netclient_poll); + x->x_fd = -1; + x->x_protocol = (udpflag != 0 ? SOCK_DGRAM : SOCK_STREAM); + /* prepare child thread */ + if(pthread_attr_init(&x->x_threadattr) < 0) + post("netclient: warning: could not prepare child thread" ); + if(pthread_attr_setdetachstate(&x->x_threadattr, PTHREAD_CREATE_DETACHED) < 0) + post("netclient: warning: could not prepare child thread" ); + clock_delay(x->x_poll, 0); /* start polling the input */ + return (x); +} + +static void netclient_free(t_netclient *x) +{ + netclient_disconnect(x); + clock_free(x->x_poll); + clock_free(x->x_clock); +} + +void netclient_setup(void) +{ + netclient_class = class_new(gensym("netclient"), (t_newmethod)netclient_new, + (t_method)netclient_free, + sizeof(t_netclient), 0, A_DEFFLOAT, 0); + class_addmethod(netclient_class, (t_method)netclient_connect, gensym("connect"), A_SYMBOL, A_FLOAT, 0); + class_addmethod(netclient_class, (t_method)netclient_disconnect, gensym("disconnect"), 0); + class_addmethod(netclient_class, (t_method)netclient_send, gensym("send"), A_GIMME, 0); + class_addmethod(netclient_class, (t_method)netclient_rcv, gensym("receive"), 0); + class_addmethod(netclient_class, (t_method)netclient_rcv, gensym("rcv"), 0); + class_sethelpsymbol(netclient_class, gensym("maxlib/help-netclient.pd")); +} \ No newline at end of file -- cgit v1.2.1