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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 *netreceive_class;
typedef struct _netreceive
{
t_object x_obj;
t_outlet *x_msgout;
t_outlet *x_connectout;
int x_connectsocket;
int x_nconnections;
int x_udp;
} t_netreceive;
static void netreceive_notify(t_netreceive *x)
{
outlet_float(x->x_connectout, --x->x_nconnections);
}
static void netreceive_doit(void *z, t_binbuf *b)
{
t_atom messbuf[1024];
t_netreceive *x = (t_netreceive *)z;
int msg, natom = binbuf_getnatom(b);
t_atom *at = binbuf_getvec(b);
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 i;
for (i = msg; i < emsg; i++)
if (at[i].a_type == A_DOLLAR || at[i].a_type == A_DOLLSYM)
{
pd_error(x, "netreceive: got dollar sign in message");
goto nodice;
}
if (at[msg].a_type == A_FLOAT)
{
if (emsg > msg + 1)
outlet_list(x->x_msgout, 0, emsg-msg, at + msg);
else outlet_float(x->x_msgout, at[msg].a_w.w_float);
}
else if (at[msg].a_type == A_SYMBOL)
outlet_anything(x->x_msgout, at[msg].a_w.w_symbol,
emsg-msg-1, at + msg + 1);
}
nodice:
msg = emsg + 1;
}
}
static void netreceive_connectpoll(t_netreceive *x)
{
int fd = accept(x->x_connectsocket, 0, 0);
if (fd < 0) post("netreceive: accept failed");
else
{
t_socketreceiver *y = socketreceiver_new((void *)x,
(t_socketnotifier)netreceive_notify,
(x->x_msgout ? netreceive_doit : 0), 0);
sys_addpollfn(fd, (t_fdpollfn)socketreceiver_read, y);
outlet_float(x->x_connectout, ++x->x_nconnections);
}
}
static void *netreceive_new(t_symbol *compatflag,
t_floatarg fportno, t_floatarg udpflag)
{
t_netreceive *x;
struct sockaddr_in server;
int sockfd, portno = fportno, udp = (udpflag != 0);
int old = !strcmp(compatflag->s_name , "old");
int intarg;
/* create a socket */
sockfd = socket(AF_INET, (udp ? SOCK_DGRAM : SOCK_STREAM), 0);
#if 0
fprintf(stderr, "receive socket %d\n", sockfd);
#endif
if (sockfd < 0)
{
sys_sockerror("socket");
return (0);
}
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
#if 1
/* ask OS to allow another Pd to repoen this port after we close it. */
intarg = 1;
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
(char *)&intarg, sizeof(intarg)) < 0)
post("setsockopt (SO_REUSEADDR) failed\n");
#endif
#if 0
intarg = 0;
if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF,
&intarg, sizeof(intarg)) < 0)
post("setsockopt (SO_RCVBUF) failed\n");
#endif
/* Stream (TCP) sockets are set NODELAY */
if (!udp)
{
intarg = 1;
if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY,
(char *)&intarg, sizeof(intarg)) < 0)
post("setsockopt (TCP_NODELAY) failed\n");
}
/* assign server port number */
server.sin_port = htons((u_short)portno);
/* name the socket */
if (bind(sockfd, (struct sockaddr *)&server, sizeof(server)) < 0)
{
sys_sockerror("bind");
sys_closesocket(sockfd);
return (0);
}
x = (t_netreceive *)pd_new(netreceive_class);
if (old)
{
/* old style, nonsecure version */
x->x_msgout = 0;
}
else x->x_msgout = outlet_new(&x->x_obj, &s_anything);
if (udp) /* datagram protocol */
{
t_socketreceiver *y = socketreceiver_new((void *)x,
(t_socketnotifier)netreceive_notify,
(x->x_msgout ? netreceive_doit : 0), 1);
sys_addpollfn(sockfd, (t_fdpollfn)socketreceiver_read, y);
x->x_connectout = 0;
}
else /* streaming protocol */
{
if (listen(sockfd, 5) < 0)
{
sys_sockerror("listen");
sys_closesocket(sockfd);
sockfd = -1;
}
else
{
sys_addpollfn(sockfd, (t_fdpollfn)netreceive_connectpoll, x);
x->x_connectout = outlet_new(&x->x_obj, &s_float);
}
}
x->x_connectsocket = sockfd;
x->x_nconnections = 0;
x->x_udp = udp;
return (x);
}
static void netreceive_free(t_netreceive *x)
{
/* LATER make me clean up open connections */
if (x->x_connectsocket >= 0)
{
sys_rmpollfn(x->x_connectsocket);
sys_closesocket(x->x_connectsocket);
}
}
static void netreceive_setup(void)
{
netreceive_class = class_new(gensym("netreceive"),
(t_newmethod)netreceive_new, (t_method)netreceive_free,
sizeof(t_netreceive), CLASS_NOINLET, A_DEFFLOAT, A_DEFFLOAT,
A_DEFSYM, 0);
}
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