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/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* network */
#include "m_pd.h"
#include "s_stuff.h"
#include <sys/types.h>
#include <string.h>
#ifdef MSW
#include <winsock.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>
#include <stdio.h>
#define SOCKET_ERROR -1
#endif
static t_class *netsend_class;
typedef struct _netsend
{
t_object x_obj;
int x_fd;
int x_protocol;
} t_netsend;
static void *netsend_new(t_floatarg udpflag)
{
t_netsend *x = (t_netsend *)pd_new(netsend_class);
outlet_new(&x->x_obj, &s_float);
x->x_fd = -1;
x->x_protocol = (udpflag != 0 ? SOCK_DGRAM : SOCK_STREAM);
return (x);
}
static void netsend_connect(t_netsend *x, t_symbol *hostname,
t_floatarg fportno)
{
struct sockaddr_in server;
struct hostent *hp;
int sockfd;
int portno = fportno;
int intarg;
if (x->x_fd >= 0)
{
error("netsend_connect: already connected");
return;
}
/* 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;
}
/* connect socket using hostname provided in command line */
server.sin_family = AF_INET;
hp = gethostbyname(hostname->s_name);
if (hp == 0)
{
post("bad host?\n");
return;
}
#if 0
intarg = 0;
if (setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF,
&intarg, sizeof(intarg)) < 0)
post("setsockopt (SO_RCVBUF) failed\n");
#endif
/* for stream (TCP) sockets, specify "nodelay" */
if (x->x_protocol == SOCK_STREAM)
{
intarg = 1;
if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY,
(char *)&intarg, sizeof(intarg)) < 0)
post("setsockopt (TCP_NODELAY) failed\n");
}
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. LATER make a separate thread to do this
because it might block */
if (connect(sockfd, (struct sockaddr *) &server, sizeof (server)) < 0)
{
sys_sockerror("connecting stream socket");
sys_closesocket(sockfd);
return;
}
x->x_fd = sockfd;
outlet_float(x->x_obj.ob_outlet, 1);
}
static void netsend_disconnect(t_netsend *x)
{
if (x->x_fd >= 0)
{
sys_closesocket(x->x_fd);
x->x_fd = -1;
outlet_float(x->x_obj.ob_outlet, 0);
}
}
static void netsend_send(t_netsend *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, bp, length-sent, 0);
double timeafter = sys_getrealtime();
int late = (timeafter - timebefore > 0.005);
if (late || pleasewarn)
{
if (timeafter > lastwarntime + 2)
{
post("netsend blocked %d msec",
(int)(1000 * ((timeafter - timebefore) + pleasewarn)));
pleasewarn = 0;
lastwarntime = timeafter;
}
else if (late) pleasewarn += timeafter - timebefore;
}
if (res <= 0)
{
sys_sockerror("netsend");
netsend_disconnect(x);
break;
}
else
{
sent += res;
bp += res;
}
}
t_freebytes(buf, length);
binbuf_free(b);
}
else error("netsend: not connected");
}
static void netsend_free(t_netsend *x)
{
netsend_disconnect(x);
}
void netsend_setup(void)
{
netsend_class = class_new(gensym("netsend"), (t_newmethod)netsend_new,
(t_method)netsend_free,
sizeof(t_netsend), 0, A_DEFFLOAT, 0);
class_addmethod(netsend_class, (t_method)netsend_connect,
gensym("connect"), A_SYMBOL, A_FLOAT, 0);
class_addmethod(netsend_class, (t_method)netsend_disconnect,
gensym("disconnect"), 0);
class_addmethod(netsend_class, (t_method)netsend_send, gensym("send"),
A_GIMME, 0);
}
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