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
|
/* x_net_udpreceive.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. */
#include "m_pd.h"
#include "s_stuff.h"
#ifdef MSW
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>
#include <stdio.h>
#endif
/* ----------------------------- udpreceive ------------------------- */
static t_class *udpreceive_class;
#define MAX_UDP_RECEIVE 65536L // longer than data in maximum UDP packet
typedef struct _udpreceive
{
t_object x_obj;
t_outlet *x_msgout;
t_outlet *x_addrout;
int x_connectsocket;
t_atom x_addrbytes[4];
t_atom x_msgoutbuf[MAX_UDP_RECEIVE];
char x_msginbuf[MAX_UDP_RECEIVE];
} t_udpreceive;
void udpreceive_setup(void);
static void udpreceive_free(t_udpreceive *x);
static void *udpreceive_new(t_floatarg fportno);
static void udpreceive_read(t_udpreceive *x, int sockfd);
static void udpreceive_read(t_udpreceive *x, int sockfd)
{
int i, read = 0;
struct sockaddr_in from;
socklen_t fromlen = sizeof(from);
long addr;
read = recvfrom(sockfd, x->x_msginbuf, MAX_UDP_RECEIVE, 0, (struct sockaddr *)&from, &fromlen);
#ifdef DEBUG
post("udpreceive_read: read %lu x->x_connectsocket = %d",
read, x->x_connectsocket);
#endif
/* get the sender's ip */
addr = ntohl(from.sin_addr.s_addr);
x->x_addrbytes[0].a_w.w_float = (addr & 0xFF000000)>>24;
x->x_addrbytes[1].a_w.w_float = (addr & 0x0FF0000)>>16;
x->x_addrbytes[2].a_w.w_float = (addr & 0x0FF00)>>8;
x->x_addrbytes[3].a_w.w_float = (addr & 0x0FF);
outlet_list(x->x_addrout, &s_list, 4L, x->x_addrbytes);
if (read < 0)
{
sys_sockerror("udpreceive_read");
sys_closesocket(x->x_connectsocket);
return;
}
if (read > 0)
{
for (i = 0; i < read; ++i)
{
/* convert the bytes in the buffer to floats in a list */
x->x_msgoutbuf[i].a_w.w_float = (float)x->x_msginbuf[i];
}
/* send the list out the outlet */
if (read > 1) outlet_list(x->x_msgout, &s_list, read, x->x_msgoutbuf);
else outlet_float(x->x_msgout, x->x_msgoutbuf[0].a_w.w_float);
}
}
static void *udpreceive_new(t_floatarg fportno)
{
t_udpreceive *x;
struct sockaddr_in server;
int sockfd, portno = fportno;
int intarg, i;
/* create a socket */
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
#ifdef DEBUG
post("udpreceive_new: socket %d port %d", sockfd, portno);
#endif
if (sockfd < 0)
{
sys_sockerror("udpreceive: socket");
return (0);
}
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
/* 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("udpreceive: setsockopt (SO_REUSEADDR) failed");
/* 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("udpreceive: bind");
sys_closesocket(sockfd);
return (0);
}
x = (t_udpreceive *)pd_new(udpreceive_class);
x->x_msgout = outlet_new(&x->x_obj, &s_anything);
x->x_addrout = outlet_new(&x->x_obj, &s_list);
x->x_connectsocket = sockfd;
/* convert the bytes in the buffer to floats in a list */
for (i = 0; i < MAX_UDP_RECEIVE; ++i)
{
x->x_msgoutbuf[i].a_type = A_FLOAT;
x->x_msgoutbuf[i].a_w.w_float = 0;
}
for (i = 0; i < 4; ++i)
{
x->x_addrbytes[i].a_type = A_FLOAT;
x->x_addrbytes[i].a_w.w_float = 0;
}
sys_addpollfn(x->x_connectsocket, (t_fdpollfn)udpreceive_read, x);
return (x);
}
static void udpreceive_free(t_udpreceive *x)
{
if (x->x_connectsocket >= 0)
{
sys_rmpollfn(x->x_connectsocket);
sys_closesocket(x->x_connectsocket);
}
}
void udpreceive_setup(void)
{
udpreceive_class = class_new(gensym("udpreceive"),
(t_newmethod)udpreceive_new, (t_method)udpreceive_free,
sizeof(t_udpreceive), CLASS_NOINLET, A_DEFFLOAT, 0);
}
/* end x_net_udpreceive.c */
|
