summaryrefslogtreecommitdiffstats
path: root/apps/plugins/pdbox/PDa/src/x_net.c
blob: aa19f78ec0897585924da096b449edf73915cc3d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
/* 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.  */

#ifdef ROCKBOX
#include "plugin.h"
#include "pdbox.h"
#endif

/* network */

#include "m_pd.h"
#include "s_stuff.h"

#ifndef ROCKBOX
#include <sys/types.h>
#include <string.h>
#ifdef UNIX
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>
#include <stdio.h>
#define SOCKET_ERROR -1
#else
#include <winsock.h>
#endif
#endif /* ROCKBOX */

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)
{
#ifdef ROCKBOX
    (void) udpflag;
#endif

    t_netsend *x = (t_netsend *)pd_new(netsend_class);
    outlet_new(&x->x_obj, &s_float);
    x->x_fd = -1;
#ifndef ROCKBOX
    x->x_protocol = (udpflag != 0 ? SOCK_DGRAM : SOCK_STREAM);
#endif
    return (x);
}

static void netsend_connect(t_netsend *x, t_symbol *hostname,
    t_floatarg fportno)
{
#ifdef ROCKBOX
    (void) x;
    (void) hostname;
    (void) fportno;
#else /* ROCKBOX */
    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,
    	    &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);
#endif /* ROCKBOX */
}

static void netsend_disconnect(t_netsend *x)
{
    if (x->x_fd >= 0)
    {
#ifndef ROCKBOX
    	sys_closesocket(x->x_fd);
#endif
    	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)
{
#ifdef ROCKBOX
    (void) x;
    (void) s;
    (void) argc;
    (void) argv;
#else /* ROCKBOX */
    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("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");
#endif /* ROCKBOX */
}

static void netsend_free(t_netsend *x)
{
#ifdef ROCKBOX
    (void) x;
#else
    netsend_disconnect(x);
#endif
}

static 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);
}

/* ----------------------------- netreceive ------------------------- */

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;

#ifdef ROCKBOX
static t_netreceive* receiver;
static int receiver_port;
#endif /* ROCKBOX */

#ifndef ROCKBOX
static void netreceive_notify(t_netreceive *x)
{
    outlet_float(x->x_connectout, --x->x_nconnections);
}
#endif /* ROCKBOX */

static void netreceive_doit(void *z, t_binbuf *b)
{
#ifndef ROCKBOX
    t_atom messbuf[1024];
#endif
    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;
    }
}

#ifndef ROCKBOX
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);
    }
}
#endif

static void *netreceive_new(t_symbol *compatflag,
    t_floatarg fportno, t_floatarg udpflag)
{
    t_netreceive *x;

#ifdef ROCKBOX
    int portno = fportno, udp = (udpflag != 0);

    (void) compatflag;

    /* Look whether callback is already taken. */
    if(receiver)
    {
        post("Receiver callback already taken!\n");
        return NULL;
    }

    /* Look whether TCP sockets are thought to exist. */
    if(!udp)
    {
        post("Trying to create TCP socket!\n");
        return NULL;
    }

    x = (t_netreceive *) pd_new(netreceive_class);
    x->x_msgout = outlet_new(&x->x_obj, &s_anything);
    x->x_nconnections = 0;
    x->x_udp = udp;

    receiver = x;
    receiver_port = portno;

#else /* ROCKBOX */
    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,
    	&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,
    	    &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;
#endif /* ROCKBOX */

    return (x);
}

static void netreceive_free(t_netreceive *x)
{
#ifdef ROCKBOX
    if(receiver && receiver == x)
        receiver = NULL;
#else /* ROCKBOX */
    	/* LATER make me clean up open connections */
    if (x->x_connectsocket >= 0)
    {
    	sys_rmpollfn(x->x_connectsocket);
    	sys_closesocket(x->x_connectsocket);
    }
#endif /* ROCKBOX */
}

#ifdef ROCKBOX
/* Basically a reimplementation of socketreceiver_getudp()
   from s_inter.c */
t_binbuf* inbinbuf;
void outlet_setstacklim(void);

void rockbox_receive_callback(struct datagram* dg)
{
    /* Check whether there is a receiver. */
    if(!receiver)
        return;

    /* Limit string. */
    dg->data[dg->size] = '\0';

    /* If complete line... */
    if(dg->data[dg->size-1] == '\n')
    {
        char* semi = strchr(dg->data, ';');

        /* Limit message. */
        if(semi)
            *semi = '\0';

        /* Create binary buffer. */
        binbuf_text(inbinbuf, dg->data, strlen(dg->data));

        /* Limit outlet stack. */
        outlet_setstacklim();

        /* Execute receive function. */
        netreceive_doit(receiver, inbinbuf);
    }
}
#endif /* ROCKBOX */

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);
}

void x_net_setup(void)
{
    netsend_setup();
    netreceive_setup();
}