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
|
#ifdef _WIN32
# include <ws2tcpip.h>
# include <error.h>
# include <stdio.h>
static void
socket_perror(const char *s) {
CHAR buf[512];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
WSAGetLastError(),
0,
buf,
sizeof(buf)/sizeof(buf[0]),
NULL);
printf("%s: %s", s, buf);
}
#else
# include <sys/fcntl.h>
# include <sys/types.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <netdb.h>
# include <stdio.h>
#define closesocket(fd) close(fd)
#define socket_perror(s) perror(s)
#endif
int
main(int argc, char* argv[]) {
int server_fd;
int client_fd;
int writer_len;
struct sockaddr_in reader_addr;
struct sockaddr_in writer_addr;
#ifdef _WIN32
WSADATA wsa;
WSAStartup(MAKEWORD(2, 0), &wsa);
#endif
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
socket_perror("reader: socket");
exit(1);
}
memset((char *) &reader_addr, 0, sizeof(reader_addr));
reader_addr.sin_family = PF_INET;
reader_addr.sin_addr.s_addr = htonl(INADDR_ANY);
reader_addr.sin_port = htons(8000);
if (bind(server_fd, (struct sockaddr *)&reader_addr, sizeof(reader_addr)) < 0) {
socket_perror("reader: bind");
exit(1);
}
socklen_t socklen = sizeof(reader_addr);
if (getsockname(server_fd, (struct sockaddr *)&reader_addr, &socklen) < 0) {
socket_perror("getsockname: bind");
exit(1);
}
if (listen(server_fd, 5) < 0) {
socket_perror("reader: listen");
closesocket(server_fd);
exit(1);
}
writer_len = sizeof(writer_addr);
if ((client_fd = accept(server_fd,(struct sockaddr *)&writer_addr, &writer_len)) < 0) {
socket_perror("reader: accept");
exit(1);
}
while (1) {
char buf[256];
size_t n = recv(client_fd, buf, sizeof(buf), 0);
puts(buf);
if (n == 0) {
break;
} else if (n == -1) {
socket_perror("recv");
exit(EXIT_FAILURE);
} else {
send(client_fd, buf, n, 0);
}
}
closesocket(server_fd);
#ifdef _WIN32
WSACleanup();
#endif
}
|
