[d3110f]: src / sockets.cc Maximize Restore History

Download this file

sockets.cc    885 lines (766 with data), 24.2 kB

  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
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
// Copyright (C) John Swensen <jpswensen@comcast.net>
// Copyright (C) 2007 Tom Holroyd <tomh@kurage.nimh.nih.gov>
// Copyright (C) 2009 Paul Dreik <slask@pauldreik.se>
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
// C++ STL includes
#include <cstdio>
#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <sstream>
using namespace std;
// Octave Includes
#include <octave/oct.h>
#include <octave/parse.h>
#include <octave/toplev.h>
#include <octave/cmd-hist.h>
#include <octave/symtab.h>
#include <octave/variables.h>
#include <octave/Array.h>
#include <octave/ops.h>
#include <octave/ov-base.h>
#include <octave/ov-typeinfo.h>
#include <octave/ov.h>
#include <octave/ov-scalar.h>
#include <octave/ov-struct.h>
#include <octave/ov-uint8.h>
#include <octave/defun-dld.h>
// System includes
#include <sys/types.h>
#ifndef __WIN32__
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef __CYGWIN__
#include <unistd.h>
#endif
#else
typedef unsigned int socklen_t;
#include <winsock2.h>
#endif
#include <errno.h>
template <class T>
std::string to_string(T t, std::ios_base & (*f)(std::ios_base&))
{
std::ostringstream oss;
oss << f << t;
return oss.str();
}
#define OCTAVE_TYPE_CONV_HELPER(VAR_IN, VAR_OUT, NAME, MATRIX_RESULT_T, SCALAR_RESULT_T) \
\
int t_arg = VAR_IN.type_id (); \
\
int t_result = MATRIX_RESULT_T::static_type_id (); \
\
if (t_arg == t_result || VAR_IN.class_name () == #NAME) \
{ \
VAR_OUT = VAR_IN; \
} \
else \
{ \
octave_base_value::type_conv_fcn cf \
= octave_value_typeinfo::lookup_type_conv_op (t_arg, t_result); \
\
if (cf) \
{ \
octave_base_value *tmp (cf (*(VAR_IN.internal_rep ()))); \
\
if (tmp) \
{ \
VAR_OUT = octave_value (tmp); \
\
VAR_OUT.maybe_mutate (); \
} \
} \
else \
{ \
std::string arg_tname = VAR_IN.type_name (); \
\
std::string result_tname = VAR_IN.numel () == 1 \
? SCALAR_RESULT_T::static_type_name () \
: MATRIX_RESULT_T::static_type_name (); \
\
gripe_invalid_conversion (arg_tname, result_tname); \
} \
}
#define OCTAVE_TYPE_CONV(VAR_IN, VAR_OUT, NAME) \
OCTAVE_TYPE_CONV_HELPER (VAR_IN, VAR_OUT, NAME, octave_ ## NAME ## _matrix, \
octave_ ## NAME ## _scalar)
// Derive an octave_socket class from octave_base_value
class octave_socket : public octave_base_value
{
private:
/**
* Socket file descriptor
*/
int sock_fd;
public:
/**
* Default constructor. Must be defined, but never used.
*/
octave_socket() {}
/**
* Constructor used to set the fd on creation.
*/
octave_socket( int fd );
/**
* Constructor used to create the socket.
*/
octave_socket( int domain, int type, int protocol );
/**
* Destructor.
*/
~octave_socket();
/**
* Various properties of the octave_socket datatype.
*/
bool is_constant (void) const { return true;}
bool is_defined (void) const { return true;}
bool print_as_scalar (void) const { return true;}
// Still undefined.
bool is_data_available() {};
/**
* Overloaded methods to print the fd as the socket id
*/
void print (ostream& os, bool pr_as_read_syntax = false) const;
void print_raw (std::ostream& os, bool pr_as_read_syntax) const;
/**
* Utility function for retrieving the socket fd.
*/
int get_sock_fd(void) { return sock_fd;};
void remove_sock_fd(void);
virtual double scalar_value (bool frc_str_conv = false) const
{
return (double)sock_fd;
}
double socket_value () const
{
return (double)sock_fd;
}
private:
DECLARE_OCTAVE_ALLOCATOR
DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
};
DEFBINOP_OP (lt_sock_s, socket, scalar, <)
DEFBINOP_OP (le_sock_s, socket, scalar, <=)
DEFBINOP_OP (eq_sock_s, socket, scalar, ==)
DEFBINOP_OP (ge_sock_s, socket, scalar, >=)
DEFBINOP_OP (gt_sock_s, socket, scalar, >)
DEFBINOP_OP (ne_sock_s, socket, scalar, !=)
DEFBINOP_OP (lt_s_sock, scalar, socket, <)
DEFBINOP_OP (le_s_sock, scalar, socket, <=)
DEFBINOP_OP (eq_s_sock, scalar, socket, ==)
DEFBINOP_OP (ge_s_sock, scalar, socket, >=)
DEFBINOP_OP (gt_s_sock, scalar, socket, >)
DEFBINOP_OP (ne_s_sock, scalar, socket, !=)
void install_socket_ops(void)
{
INSTALL_BINOP (op_lt, octave_socket, octave_scalar, lt_sock_s);
INSTALL_BINOP (op_le, octave_socket, octave_scalar, le_sock_s);
INSTALL_BINOP (op_eq, octave_socket, octave_scalar, eq_sock_s);
INSTALL_BINOP (op_ge, octave_socket, octave_scalar, ge_sock_s);
INSTALL_BINOP (op_gt, octave_socket, octave_scalar, gt_sock_s);
INSTALL_BINOP (op_ne, octave_socket, octave_scalar, ne_sock_s);
INSTALL_BINOP (op_lt, octave_scalar, octave_socket, lt_s_sock);
INSTALL_BINOP (op_le, octave_scalar, octave_socket, le_s_sock);
INSTALL_BINOP (op_eq, octave_scalar, octave_socket, eq_s_sock);
INSTALL_BINOP (op_ge, octave_scalar, octave_socket, ge_s_sock);
INSTALL_BINOP (op_gt, octave_scalar, octave_socket, gt_s_sock);
INSTALL_BINOP (op_ne, octave_scalar, octave_socket, ne_s_sock);
}
DEFINE_OCTAVE_ALLOCATOR (octave_socket);
DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_socket, "octave_socket", "octave_socket");
// This macro must start with DEFUN_DLD so that the automatic collection
// of function helps can take place. To get the code working in
// multiple versions of octave, we have to check the version number.
#if !defined(MINORVERSION) || !defined(MAJORVERSION)
# error "please define MAJORVERSION and MINORVERSION to the octave version numbers"
#endif
#if MAJORVERSION==3 && MINORVERSION<2
# define DEFUN_DLD_SOCKET_CONSTANT(name, help ) \
DEFUNX_DLD ( #name, F ## name, FS ## name, args, nargout, help) \
{ return octave_value( name ); };
#else
# define DEFUN_DLD_SOCKET_CONSTANT(name, help ) \
DEFUNX_DLD ( #name, F ## name, G ## name, args, nargout, help) \
{ return octave_value( name ); };
#endif
// PKG_ADD: autoload ("AF_UNIX", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(AF_UNIX, "socket constant" );
#ifndef __WIN32__
// PKG_ADD: autoload ("AF_LOCAL", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(AF_LOCAL, "socket constant" );
#else
DEFUNX_DLD ( "AF_LOCAL", FAFL_OCAL, FSAF_LOCAL, args, nargout, "socket constant" )
{ error( "AF_LOCAL address family not supported on this platform" ); return octave_value(); };
#endif
// PKG_ADD: autoload ("AF_INET", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(AF_INET, "socket constant" );
// PKG_ADD: autoload ("AF_APPLETALK", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(AF_APPLETALK, "socket constant" );
//DEFUN_DLD_SOCKET_CONSTANT(AF_INET6, "socket constant" );
//DEFUN_DLD_SOCKET_CONSTANT(AF_IPX, "socket constant" );
//DEFUN_DLD_SOCKET_CONSTANT(AF_NETLINK, "socket constant" );
//DEFUN_DLD_SOCKET_CONSTANT(AF_X25, "socket constant" );
//DEFUN_DLD_SOCKET_CONSTANT(AF_AX25, "socket constant" );
//DEFUN_DLD_SOCKET_CONSTANT(AF_ATMPVC, "socket constant" );
//DEFUN_DLD_SOCKET_CONSTANT(AF_PACKET, "socket constant" );
// PKG_ADD: autoload ("SOCK_STREAM", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(SOCK_STREAM, "socket constant" );
// PKG_ADD: autoload ("SOCK_DGRAM", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(SOCK_DGRAM, "socket constant" );
// PKG_ADD: autoload ("SOCK_SEQPACKET", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(SOCK_SEQPACKET, "socket constant" );
// PKG_ADD: autoload ("SOCK_RAW", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(SOCK_RAW, "socket constant" );
// PKG_ADD: autoload ("SOCK_RDM", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(SOCK_RDM, "socket constant" );
//DEFUN_DLD_SOCKET_CONSTANT(SOCK_PACKET, "socket constant" );
// PKG_ADD: autoload ("MSG_PEEK", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(MSG_PEEK, "socket constant" );
#ifdef MSG_DONTWAIT
// PKG_ADD: autoload ("MSG_DONTWAIT", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(MSG_DONTWAIT, "socket constant" );
#endif
#ifdef MSG_WAITALL
// PKG_ADD: autoload ("MSG_WAITALL", "sockets.oct");
DEFUN_DLD_SOCKET_CONSTANT(MSG_WAITALL, "socket constant" );
#endif
std::map< int, octave_socket * > socket_map;
static bool type_loaded = false;
//////////////////////////////////////////////////////////////////////////////////////////
octave_socket::octave_socket( int fd )
{
sock_fd = fd;
socket_map[sock_fd] = this;
}
//////////////////////////////////////////////////////////////////////////////////////////
octave_socket::octave_socket( int domain, int type, int protocol )
{
sock_fd = ::socket( domain, type, protocol );
if ( sock_fd == -1 )
{
error( "octave_socket: Error creating socket" );
}
else
{
socket_map[sock_fd] = this;
}
}
//////////////////////////////////////////////////////////////////////////////////////////
octave_socket::~octave_socket()
{
remove_sock_fd();
}
//////////////////////////////////////////////////////////////////////////////////////////
void octave_socket::print (ostream& os, bool pr_as_read_syntax ) const
{
print_raw (os, pr_as_read_syntax);
newline (os);
}
void octave_socket::print_raw (std::ostream& os, bool pr_as_read_syntax) const
{
os << sock_fd;
}
void octave_socket::remove_sock_fd(void)
{
#ifndef __WIN32__
::close( sock_fd );
#else
::closesocket( sock_fd );
#endif
socket_map.erase( sock_fd );
sock_fd = -1;
}
// PKG_ADD: autoload ("socket", "sockets.oct");
// Function to create a socket
DEFUN_DLD(socket,args,nargout,
"s=socket(domain,type,protocol)\n"
"Creates a socket. Domain is an integer, where the value AF_INET\n"
"can be used to create an IPv4 socket.\n"
"type is an integer describing the socket. When using IP, specifying "
"SOCK_STREAM gives a TCP socket.\n"
"protocol is currently not used and should be 0 if specified.\n"
"\n"
"If no input arguments are given, default values AF_INET and \n"
"SOCK_STREAM are used.\n"
"See the local socket() reference for more details\n")
{
int domain = AF_INET;
int type = SOCK_STREAM;
int protocol = 0;
if ( !type_loaded )
{
octave_socket::register_type ();
install_socket_ops();
type_loaded = true;
#ifdef __WIN32__
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 )
{
error( "could not initialize winsock library" );
return octave_value();
}
#endif
}
// Convert the arguments to their #define'd value
if ( args.length() > 0 )
{
domain = args(0).int_value();
}
if ( args.length() > 1 )
{
type = args(1).int_value();
}
if ( args.length() > 2 )
{
protocol = args(2).int_value();
if( protocol != 0 )
{
error( "For now, protocol must always be 0 (zero)" );
return octave_value(-1);
}
}
// Create the new socket
octave_socket* retval = new octave_socket( domain, type, protocol );
if ( nargout > 0 && retval->get_sock_fd() != -1 )
return octave_value(retval);
return octave_value();
}
// PKG_ADD: autoload ("connect", "sockets.oct");
// function to create an outgoing connection
DEFUN_DLD(connect,args,nargout, \
"status=connect(sock,serverinfo)\n"
"Connects the socket given in sock following the information\n"
"given in the struct serverinfo\n"
"serverinfo shall contain the following fields:\n"
" addr - a string with the host name to connect to\n"
" port - the port number to connect to (an integer)\n"
"\n"
"On successful connect, zero is returned in status.\n"
"\n"
"See the connect() man pages for further details.\n")
{
int retval = -1;
struct sockaddr_in serverInfo;
struct hostent* hostInfo;
if ( args.length() < 2 )
{
error("connect: you must specify 2 paramters");
return octave_value(-1);
}
// Extract information about the server to connect to.
const octave_base_value& struct_serverInfo = args(1).get_rep();
octave_struct& addrInfo = ((octave_struct&)struct_serverInfo);
#if MINORVERSION <= 2
string addr = addrInfo.map_value().stringfield("addr");
int port = addrInfo.map_value().intfield("port");
#else
const Cell addr_cell = addrInfo.map_value().getfield ("addr");
string addr;
if (addr_cell.numel () == 1 && addr_cell (0).is_string ())
{
addr = addr_cell (0).string_value ();
}
else
{
error ("connect: invalid input: no 'addr' field");
return octave_value (-1);
}
const Cell port_cell = addrInfo.map_value().getfield ("port");
int port;
if (port_cell.numel () == 1 && port_cell (0).is_numeric_type ())
{
port = port_cell (0).int_value ();
}
else
{
error ("connect: invalid input: no 'port' field");
return octave_value (-1);
}
#endif
// Determine the socket on which to operate
octave_socket* s = NULL;
if ( args(0).type_id() == octave_socket::static_type_id() )
{
const octave_base_value& rep = args(0).get_rep();
s = &((octave_socket &)rep);
}
else if ( args(0).is_scalar_type() )
{
int fd = args(0).int_value();
s = socket_map[fd];
}
else
{
error("connect: expecting a octave_socket or integer");
return octave_value(-1);
}
// Fill in the server info struct
serverInfo.sin_family = AF_INET;
if ( addr.length() > 0 )
{
hostInfo = gethostbyname( addr.c_str() );
if ( hostInfo )
{
serverInfo.sin_addr.s_addr = *((long*)hostInfo->h_addr_list[0]);
}
else
{
error( "connect: error in gethostbyname()" );
return octave_value(-1);
}
}
else
{
error( "connect: empty address" );
return octave_value(-1);
}
serverInfo.sin_port = htons(port);
retval = connect( s->get_sock_fd(), (struct sockaddr*)&serverInfo, sizeof(struct sockaddr) );
return octave_value(retval);
}
// PKG_ADD: autoload ("disconnect", "sockets.oct");
// function to disconnect asocket
DEFUN_DLD(disconnect,args,nargout, \
"disconnect(octave_socket)\n"
"Since we can't call fclose on the fd directly, use this to disconnect")
{
// Determine the socket on which to operate
octave_socket* s = NULL;
if ( args(0).type_id() == octave_socket::static_type_id() )
{
const octave_base_value& rep = args(0).get_rep();
s = &((octave_socket &)rep);
}
else if ( args(0).is_scalar_type() )
{
int fd = args(0).int_value();
s = socket_map[fd];
}
else
{
error("connect: expecting a octave_socket or integer");
return octave_value(-1);
}
s->remove_sock_fd();
return octave_value(0);
}
// PKG_ADD: autoload ("gethostbyname", "sockets.oct");
// function to get a host number from a host name
DEFUN_DLD(gethostbyname,args,nargout, \
"gethostbyname(string)\n"
"See the gethostbyname() man pages")
{
int nargin = args.length ();
struct hostent* hostInfo = NULL;
octave_value retval;
if (nargin != 1)
print_usage ();
else if ( args(0).is_string() )
{
string_vector host_list;
string addr = args(0).string_value();
hostInfo = gethostbyname( addr.c_str() );
if ( hostInfo )
{
for ( int i = 0 ; i < hostInfo->h_length/4 ; i++ )
{
string temp_addr = string( inet_ntoa( *(struct in_addr*)hostInfo->h_addr_list[i] ));
host_list.append( temp_addr );
}
}
retval = octave_value (host_list);
}
else
print_usage ();
return retval;
}
// PKG_ADD: autoload ("send", "sockets.oct");
// function to send data over a socket
DEFUN_DLD(send,args,nargout, \
"send(octave_socket,octave_value,flags)\n"
"See the send() man pages. This will only allow the\n"
"user to send uint8 arrays or strings\n")
{
int retval = 0;
int flags = 0;
if ( args.length() < 2 )
{
error( "send: you must specify 2 parameters");
return octave_value(-1);
}
if ( args.length() > 2 && args(2).is_scalar_type() )
flags = args(2).int_value();
// Determine the socket on which to operate
octave_socket* s = NULL;
if ( args(0).type_id() == octave_socket::static_type_id() )
{
const octave_base_value& rep = args(0).get_rep();
s = &((octave_socket &)rep);
}
else if ( args(0).is_scalar_type() )
{
int fd = args(0).int_value();
s = socket_map[fd];
}
else
{
error("connect: expecting a octave_socket or integer");
return octave_value(-1);
}
// Extract the data from the octave variable and send it
const octave_base_value& data = args(1).get_rep();
if ( data.is_string() )
{
string buf = data.string_value();
retval = ::send( s->get_sock_fd(), buf.c_str(), buf.length(), flags );
}
else if ( data.byte_size() == data.numel() )
{
NDArray d1 = data.array_value();
unsigned char* buf = new unsigned char[ d1.length() ];
for ( int i = 0 ; i < d1.length() ; i++ )
buf[i] = (unsigned char)d1(i);
retval = ::send( s->get_sock_fd(), (const char*)buf, data.byte_size(), 0 );
delete[] buf;
}
else
{
error( "connect: you have specified an invalid data type to send. Please format it prior to sending" );
return octave_value(-1);
}
return octave_value(retval);
}
// PKG_ADD: autoload ("recv", "sockets.oct");
// function to receive data over a socket
DEFUN_DLD(recv,args,nargout, \
"[data,count]=recv(sock,len,flags)\n"
"Requests reading len bytes from the socket given in sock.\n"
"The integer flags parameter can be used to modify the behaviour\n"
"of recv.\n"
"\n"
"The read data is returned in an uint8 array data. The number of\n"
"bytes read is returned in count\n"
"\n"
"You can get non-blocking operation by using the flag MSG_DONTWAIT\n"
"which makes the recv() call return immediately. If there is no\n"
"data, -1 is returned.\n"
"See the recv() man pages for further details.\n")
{
int retval = 0;
int flags = 0;
if ( args.length() < 2 )
{
error( "recv: you must specify 2 parameters" );
return octave_value(-1);
}
if ( args.length() > 2 && args(2).is_scalar_type() )
flags = args(2).int_value();
// Determine the socket on which to operate
octave_socket* s = NULL;
if ( args(0).type_id() == octave_socket::static_type_id() )
{
const octave_base_value& rep = args(0).get_rep();
s = &((octave_socket &)rep);
}
else if ( args(0).is_scalar_type() )
{
int fd = args(0).int_value();
s = socket_map[fd];
}
else
{
error("recv: expecting a octave_socket or integer");
return octave_value(-1);
}
long len = args(1).int_value();
if(len<0) {
error("recv: negative receive length requested");
return octave_value(-1);
}
unsigned char* buf = new unsigned char[ len ];
#ifndef __WIN32__
retval = ::recv( s->get_sock_fd(), buf, len, flags );
#else
retval = ::recv( s->get_sock_fd(), ( char* )buf, len, flags );
#endif
octave_value_list return_list;
//always return the status in the second output parameter
return_list(1) = retval;
if(retval<0) {
//We get -1 if an error occurs,or if there is no data and the
//socket is non-blocking. We should return in both cases.
} else if (0==retval) {
//The peer has shut down.
} else {
//Normal behaviour.
Matrix return_buf(1,retval);
for ( int i = 0 ; i < retval ; i++ )
return_buf(0,i) = buf[i];
octave_value in_buf(return_buf);
octave_value out_buf;
OCTAVE_TYPE_CONV( in_buf, out_buf, uint8 );
return_list(0) = out_buf;
}
delete[] buf;
return return_list;
}
// PKG_ADD: autoload ("bind", "sockets.oct");
// function to bind a socket
DEFUN_DLD(bind,args,nargout, \
"bind(octave_socket,int)\n"
"See the bind() man pages. This will bind a socket to a" \
" specific port\n")
{
int retval = 0;
if ( args.length() < 2 )
{
error( "bind: you must specify 2 parameters" );
return octave_value(-1);
}
// Determine the socket on which to operate
octave_socket* s = NULL;
if ( args(0).type_id() == octave_socket::static_type_id() )
{
const octave_base_value& rep = args(0).get_rep();
s = &((octave_socket &)rep);
}
else if ( args(0).is_scalar_type() )
{
int fd = args(0).int_value();
s = socket_map[fd];
}
else
{
error("connect: expecting a octave_socket or integer");
return octave_value(-1);
}
long port = args(1).int_value();
struct sockaddr_in serverInfo;
serverInfo.sin_family = AF_INET;
serverInfo.sin_port = htons( port );
serverInfo.sin_addr.s_addr = INADDR_ANY;
retval = ::bind( s->get_sock_fd(), (struct sockaddr *)&serverInfo, sizeof(serverInfo) );
return octave_value(retval);
}
// PKG_ADD: autoload ("listen", "sockets.oct");
// function to listen on a socket
DEFUN_DLD(listen,args,nargout, \
"listen(octave_socket,int)\n"
"See the listen() man pages\n")
{
int retval = 0;
if ( args.length() < 2 )
{
error( "listen: you must specify 2 parameters" );
return octave_value(-1);
}
// Determine the socket on which to operate
octave_socket* s = NULL;
if ( args(0).type_id() == octave_socket::static_type_id() )
{
const octave_base_value& rep = args(0).get_rep();
s = &((octave_socket &)rep);
}
else if ( args(0).is_scalar_type() )
{
int fd = args(0).int_value();
s = socket_map[fd];
}
else
{
error("connect: expecting a octave_socket or integer");
return octave_value(-1);
}
int backlog = args(1).int_value();
// octave_stdout << "BACKLOG: " << backlog << endl;
if (! error_state)
retval = ::listen( s->get_sock_fd(), backlog );
return octave_value(retval);
}
// PKG_ADD: autoload ("accept", "sockets.oct");
// function to accept on a listening socket
DEFUN_DLD(accept,args,nargout, \
"accept(octave_socket)\n"
"See the accept() man pages\n")
{
int retval = 0;
struct sockaddr_in clientInfo;
socklen_t clientLen = sizeof(struct sockaddr_in);
if ( args.length() < 1 )
{
error( "accept: you must specify 1 parameter" );
return octave_value(-1);
}
// Determine the socket on which to operate
octave_socket* s = NULL;
if ( args(0).type_id() == octave_socket::static_type_id() )
{
const octave_base_value& rep = args(0).get_rep();
s = &((octave_socket &)rep);
}
else if ( args(0).is_scalar_type() )
{
int fd = args(0).int_value();
s = socket_map[fd];
}
else
{
error("accept: expecting a octave_socket or integer");
return octave_value(-1);
}
#ifndef __WIN32__
int fd = ::accept( s->get_sock_fd(), (struct sockaddr *)&clientInfo, &clientLen );
#else
int fd = ::accept( s->get_sock_fd(), (struct sockaddr *)&clientInfo, ( int* )&clientLen );
#endif
if ( fd != -1 )
{
// create the octave_socket object and set the fd
octave_socket* retobj = new octave_socket(fd);
// place the client information into a structure
Octave_map client_info_map;
client_info_map.assign("sin_family", octave_value(clientInfo.sin_family));
client_info_map.assign("sin_port", octave_value(clientInfo.sin_port));
client_info_map.assign("sin_addr", octave_value( inet_ntoa(clientInfo.sin_addr)));
// returns the accepted socket and a clientinfo structure
octave_value_list return_list;
return_list(0) = octave_value(retobj);
return_list(1) = client_info_map;
return return_list;
}
else
{
ostringstream os;
os << "accept: failed with errno = " << errno;
error(os.str().c_str());
return octave_value(fd);
}
}
// PKG_ADD: autoload ("load_socket_constants", "sockets.oct");
// function to load socket constants
DEFUN_DLD(load_socket_constants,args,nargout, \
"Loads various socket constants like AF_INET, SOCK_STREAM, etc.\n")
{
octave_socket temp();
return octave_value();
}