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
|
#include <necho.h>
int slurpsock(RingBuffer *buf, int sock)
{
ssize_t bytes;
if (RingBuffer_available_data(buf) == 0) {
buf->start = buf->end = 0;
}
bytes = recv(sock, RingBuffer_starts_at(buf),
RingBuffer_available_space(buf), 0);
check(bytes >= 0, "Failed to read from socket: %d", sock);
RingBuffer_commit_write(buf, bytes);
return bytes;
error:
return -1;
}
int barfsock(int sock, RingBuffer *buf, int len)
{
int bytes = 0;
bstring data = RingBuffer_get_all(buf);
check(data != NULL, "barfsock: Failed to get from the buffer.");
bytes = send(sock, bdata(data), len, 0);
check(bytes >= 0, "barfsock: send failed");
return bytes;
error:
return -1;
}
void echoserve(int sock)
{
int rc = 0;
RingBuffer *buf = RingBuffer_create(1024 * 10);
ssize_t bytes;
do {
bytes = slurpsock(buf, sock);
check(bytes >= 0, "echoserve: slurpsock failed");
if (bytes < 1) {
break;
}
rc = barfsock(sock, buf, bytes);
check(rc != -1, "echoserve: echo failed");
} while(1);
rc = close(sock);
check(rc == 0, "echoserve: close failed");
exit(0);
error:
rc = close(sock);
check(rc == 0, "echoserve: close failed");
exit(1);
}
|
