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
|
/*****************************************************************************/
/*
* pktsimple.c -- Simple packet generator/sink.
*
* Copyright (C) 1999-2000
* Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*****************************************************************************/
#define _GNU_SOURCE
#define _REENTRANT
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "soundio.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
/* ---------------------------------------------------------------------- */
static unsigned int terminate = 0;
static RETSIGTYPE sigterm()
{
terminate = 1;
}
struct modemparams pktmkissparams[] = {
{ NULL }
};
struct modemparams pktkissparams[] = {
{ NULL }
};
void pktinit(struct modemchannel *chan, const char *params[])
{
return;
}
void pktinitmkiss(struct modemchannel *chan, const char *params[])
{
return;
}
int pktget(struct modemchannel *chan, unsigned char *data, unsigned int len)
{
static unsigned int pktnr = 0;
unsigned int i;
#if 0
memset(data, 0x55, len);
return terminate ? 0 : len;
#endif
if (len < 5) {
for (i = 0; i < len; i++)
data[i] = '@' + i;
return terminate ? 0 : len;
}
snprintf(data, len, "%04X", pktnr);
pktnr = (pktnr + 1) & 0xffff;
for (i = 4; i < len; i++)
data[i] = '@' - 4 + i;
return terminate ? 0 : len;
}
void pktput(struct modemchannel *chan, const unsigned char *data, unsigned int len)
{
unsigned int i;
fprintf(stderr, "Data: ");
for (i = 0; i < len; i++)
#if 1
if (data[i] >= ' ' && data[i] <= 0x7f)
putc(data[i], stderr);
else
putc('.', stderr);
#else
fprintf(stderr, "%02x", data[i]);
#endif
fprintf(stderr, "\n");
}
void pkttransmitloop(struct state *state)
{
struct modemchannel *chan;
unsigned int nrtx;
#ifndef WIN32
signal(SIGHUP, sigterm);
#endif
pttsetptt(&state->ptt, 1);
while (!terminate) {
nrtx = 0;
for (chan = state->channels; chan; chan = chan->next)
if (chan->mod) {
chan->mod->modulate(chan->modstate, 0);
nrtx++;
}
if (!nrtx)
break;
}
pttsetptt(&state->ptt, 0);
}
void pktsetdcd(struct modemchannel *chan, int dcd)
{
pttsetdcd(&chan->state->ptt, dcd);
}
void pktrelease(struct modemchannel *chan)
{
}
void p3dreceive(struct modemchannel *chan, const unsigned char *pkt, u_int16_t crc)
{
}
void p3drxstate(struct modemchannel *chan, unsigned int synced, unsigned int carrierfreq)
{
pktsetdcd(chan, !!synced);
}
/* ---------------------------------------------------------------------- */
|
