aboutsummaryrefslogtreecommitdiff
path: root/tcpsend.c
blob: 9277b57325c20d9302716e12174b9df0d7bf542b (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
/* tcpsend.c
 * copyright (c) 2010 IOhannes m zmölnig, IEM
 * copyright (c) 2006-2010 Martin Peach
 * copyright (c) Miller Puckette
 */

/*                                                                              */
/* A client for unidirectional communication from within Pd.                     */
/*                                                                              */
/* 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 2               */
/* 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, write to the Free Software                  */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.  */
/*                                                                              */


#include "iemnet.h"
#include <string.h>

#ifndef _WIN32
# include <netinet/tcp.h>
#endif


static t_class *tcpsend_class;

typedef struct _tcpsend
{
  t_object x_obj;
  int      x_fd;
  t_iemnet_sender*x_sender;
} t_tcpsend;

static void tcpsend_disconnect(t_tcpsend *x)
{
  if (x->x_fd >= 0)
    {
      if(x->x_sender)iemnet__sender_destroy(x->x_sender); x->x_sender=NULL;
      sys_closesocket(x->x_fd);
      x->x_fd = -1;
      outlet_float(x->x_obj.ob_outlet, 0);
      post("tcpsend: disconnected");
    }
}



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);
  DEBUG("send socket %d\n", sockfd);
  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;

  x->x_sender=iemnet__sender_create(sockfd);

  outlet_float(x->x_obj.ob_outlet, 1);
}

static void tcpsend_send(t_tcpsend *x, t_symbol *s, int argc, t_atom *argv)
{
  int size=0;
  t_iemnet_sender*sender=x->x_sender;
  t_iemnet_chunk*chunk=iemnet__chunk_create_list(argc, argv);
  if(sender && chunk) {
    size=iemnet__sender_send(sender, chunk);
  }
  iemnet__chunk_destroy(chunk);
}

static void tcpsend_free(t_tcpsend *x)
{
  tcpsend_disconnect(x);
}

static void *tcpsend_new(void)
{
  t_tcpsend *x = (t_tcpsend *)pd_new(tcpsend_class);
  outlet_new(&x->x_obj, gensym("float"));
  x->x_fd = -1;
  return (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 */