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/* tcpsend.c 20060424 Martin Peach did it based on x_net.c. x_net.c header follows: */
/* 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 <stdio.h>
#include <string.h>
#ifdef _WIN32
#include <winsock2.h>
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>
#endif
static t_class *tcpsend_class;
typedef struct _tcpsend
{
t_object x_obj;
int x_fd;
} t_tcpsend;
void tcpsend_setup(void);
static void tcpsend_free(t_tcpsend *x);
static void tcpsend_send(t_tcpsend *x, t_symbol *s, int argc, t_atom *argv);
static void tcpsend_disconnect(t_tcpsend *x);
static void tcpsend_connect(t_tcpsend *x, t_symbol *hostname, t_floatarg fportno);
static void *tcpsend_new(void);
static void *tcpsend_new(void)
{
t_tcpsend *x = (t_tcpsend *)pd_new(tcpsend_class);
outlet_new(&x->x_obj, &s_float);
x->x_fd = -1;
return (x);
}
static void tcpsend_connect(t_tcpsend *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("tcpsend: already connected");
return;
}
/* create a socket */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
#ifdef DEBUG
fprintf(stderr, "tcpsend_connect: send socket %d\n", sockfd);
#endif
if (sockfd < 0)
{
sys_sockerror("tcpsend: socket");
return;
}
/* connect socket using hostname provided in command line */
server.sin_family = AF_INET;
hp = gethostbyname(hostname->s_name);
if (hp == 0)
{
post("tcpsend: bad host?\n");
return;
}
/* for stream (TCP) sockets, specify "nodelay" */
intarg = 1;
if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY,
(char *)&intarg, sizeof(intarg)) < 0)
post("tcpsend: 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("tcpsend: connecting to port %d", portno);
/* try to connect. */
if (connect(sockfd, (struct sockaddr *) &server, sizeof (server)) < 0)
{
sys_sockerror("tcpsend: connecting stream socket");
sys_closesocket(sockfd);
return;
}
x->x_fd = sockfd;
outlet_float(x->x_obj.ob_outlet, 1);
}
static void tcpsend_disconnect(t_tcpsend *x)
{
if (x->x_fd >= 0)
{
sys_closesocket(x->x_fd);
x->x_fd = -1;
outlet_float(x->x_obj.ob_outlet, 0);
post("tcpsend: disconnected");
}
}
static void tcpsend_send(t_tcpsend *x, t_symbol *s, int argc, t_atom *argv)
{
#define BYTE_BUF_LEN 65536 // arbitrary maximum similar to max IP packet size
static char byte_buf[BYTE_BUF_LEN];
int i, j;
unsigned int d;
unsigned char c;
float f, e;
char *bp;
int length, sent;
int result;
static double lastwarntime;
static double pleasewarn;
double timebefore;
double timeafter;
int late;
char fpath[FILENAME_MAX];
FILE *fptr;
#ifdef DEBUG
post("s: %s", s->s_name);
post("argc: %d", argc);
#endif
for (i = j = 0; i < argc; ++i)
{
if (argv[i].a_type == A_FLOAT)
{
f = argv[i].a_w.w_float;
d = (unsigned int)f;
e = f - d;
if (e != 0)
{
error("tcpsend_send: item %d (%f) is not an integer", i, f);
return;
}
c = (unsigned char)d;
if (c != d)
{
error("tcpsend_send: item %d (%f) is not between 0 and 255", i, f);
return;
}
#ifdef DEBUG
post("tcpsend_send: argv[%d]: %d", i, c);
#endif
byte_buf[j++] = c;
}
else if (argv[i].a_type == A_SYMBOL)
{
atom_string(&argv[i], fpath, FILENAME_MAX);
#ifdef DEBUG
post ("tcpsend fname: %s", fpath);
#endif
fptr = fopen(fpath, "rb");
if (fptr == NULL)
{
post("tcpsend: unable to open \"%s\"", fpath);
return;
}
rewind(fptr);
#ifdef DEBUG
post("tcpsend: d is %d", d);
#endif
while ((d = fgetc(fptr)) != EOF)
{
byte_buf[j++] = (char)(d & 0x0FF);
#ifdef DEBUG
post("tcpsend: byte_buf[%d] = %d", j-1, byte_buf[j-1]);
#endif
if (j >= BYTE_BUF_LEN)
{
post ("tcpsend: file too long, truncating at %lu", BYTE_BUF_LEN);
break;
}
}
fclose(fptr);
fptr = NULL;
post("tcpsend: read \"%s\" length %d byte%s", fpath, j, ((d==1)?"":"s"));
}
else
{
error("tcpsend_send: item %d is not a float or a file name", i);
return;
}
}
length = j;
if ((x->x_fd >= 0) && (length > 0))
{
for (bp = byte_buf, sent = 0; sent < length;)
{
timebefore = sys_getrealtime();
result = send(x->x_fd, byte_buf, length-sent, 0);
timeafter = sys_getrealtime();
late = (timeafter - timebefore > 0.005);
if (late || pleasewarn)
{
if (timeafter > lastwarntime + 2)
{
post("tcpsend blocked %d msec",
(int)(1000 * ((timeafter - timebefore) + pleasewarn)));
pleasewarn = 0;
lastwarntime = timeafter;
}
else if (late) pleasewarn += timeafter - timebefore;
}
if (result <= 0)
{
sys_sockerror("tcpsend");
tcpsend_disconnect(x);
break;
}
else
{
sent += result;
bp += result;
}
}
}
else error("tcpsend: not connected");
}
static void tcpsend_free(t_tcpsend *x)
{
tcpsend_disconnect(x);
}
void tcpsend_setup(void)
{
tcpsend_class = class_new(gensym("tcpsend"), (t_newmethod)tcpsend_new,
(t_method)tcpsend_free,
sizeof(t_tcpsend), 0, 0);
class_addmethod(tcpsend_class, (t_method)tcpsend_connect,
gensym("connect"), A_SYMBOL, A_FLOAT, 0);
class_addmethod(tcpsend_class, (t_method)tcpsend_disconnect,
gensym("disconnect"), 0);
class_addmethod(tcpsend_class, (t_method)tcpsend_send, gensym("send"),
A_GIMME, 0);
class_addlist(tcpsend_class, (t_method)tcpsend_send);
}
/* end tcpsend.c */
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