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
|
#if 0 /*
#/ ================================================================
#/
#/ echo.c
#/
#/ ================================================================
#/
#/ Self-compilation shell script
#/
SRC=${0##*./}
BIN=${SRC%.*}
gcc \
-Wall -Wextra -Werror -pedantic \
-Wno-old-style-declaration \
-Wno-missing-braces \
-Wno-unused-variable \
-Wno-unused-but-set-variable \
-Wno-unused-parameter \
-Wno-overlength-strings \
-O3 \
-fsanitize=undefined,address,leak -mshstk \
-lX11 -lm \
-o $BIN $SRC && \
./$BIN $@ && rm $BIN
exit $? # */
#endif
#include "../reduced_system_layer.c"
enum {
MODE_RECV = 1,
MODE_SEND,
PORT = 42069,
};
i32 main(i32 argc, c8 **argv) {
if (argc < 2) {
if (argc == 1)
printf("Usade: %s recv|send\n", argv[0]);
return -1;
}
i32 mode = 0;
if (strcmp(argv[1], "recv") == 0)
mode = MODE_RECV;
else if (strcmp(argv[1], "send") == 0)
mode = MODE_SEND;
if (mode == 0) {
printf("Usage: %s recv|send\n", argv[0]);
return -1;
}
static c8 buf[256] = "";
switch (mode) {
case MODE_RECV: {
printf("Receiving UDP messages on port %d\n\n", PORT);
for (;;) {
i64 n = p_recv(
0,
(IP_Address) {
.protocol = IPv4_UDP,
.port = PORT,
.v4_address = { 0, 0, 0, 0 },
},
sizeof buf - 1,
(u8 *) buf,
NULL,
NULL
);
if (strcmp(buf, "!kill") == 0)
break;
if (n > 0) {
buf[n] = '\0';
printf("%s\n", buf);
} else
p_sleep_for(10);
}
} break;
case MODE_SEND: {
printf("Sending UDP messages to 127.0.0.1 on port %d\nEnter a message or !quit\n\n> ", PORT);
for (;;) {
if (scanf("%s", buf) == 0)
continue;
if (strcmp(buf, "!quit") == 0)
break;
p_send(
0,
(IP_Address) {
.protocol = IPv4_UDP,
.port = PORT,
.v4_address = { 127, 0, 0, 1 },
},
strlen(buf),
(u8 *) buf,
NULL
);
printf("> ");
}
} break;
default:;
}
p_cleanup();
return 0;
}
|
