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
|
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <assert.h>
#include "socket.h"
static int socket_nonblock(const psocket *psocket)
{
int flags;
flags = fcntl(psocket->fd, F_GETFL, 0);
if (flags < 0)
return 1;
flags |= O_NONBLOCK;
if (fcntl(psocket->fd, F_SETFL, flags) == -1)
return 1;
return 0;
}
int socket_init_in(psocket *psocket, const char *listen_addr,
const char *listen_port, struct addrinfo **results)
{
struct addrinfo hints;
assert(psocket);
assert(listen_addr || listen_port); /* getaddrinfo wants either node or service */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; /* IPV4 && IPV6 */
hints.ai_socktype = SOCK_STREAM; /* TCP */
hints.ai_flags = AI_PASSIVE; /* all interfaces */
return getaddrinfo(listen_addr, listen_port, &hints, results);
}
int socket_bind_in(psocket *psocket, struct addrinfo *results)
{
int fd = -1, rv, reuse_enable = 1;
struct addrinfo *rp = NULL;
assert(psocket && results);
for (rp = results; rp != NULL; rp = rp->ai_next) {
fd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if (fd < 0)
continue;
rv = bind(fd, rp->ai_addr, rp->ai_addrlen);
if (!rv)
break;
close(fd);
}
if (!rp)
return -1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse_enable, sizeof(int)) < 0)
return -2;
psocket->fd = fd;
psocket->addr = *rp;
freeaddrinfo(results);
return socket_nonblock(psocket);
}
int socket_listen_in(psocket *psocket)
{
assert(psocket);
return listen(psocket->fd, POTD_BACKLOG);
}
int socket_accept_in(const psocket *psocket, struct sockaddr_in *clientaddr)
{
int fd;
socklen_t alen = {0};
assert(psocket && clientaddr);
fd = accept(psocket->fd, (struct sockaddr*) clientaddr, &alen);
if (fd < 0)
return -1;
if (socket_nonblock(psocket))
return -2;
return fd;
}
int socket_addrtostr_in(const struct sockaddr_in *in_addr,
char hbuf[NI_MAXHOST], char sbuf[NI_MAXSERV])
{
int s;
assert(in_addr);
s = getnameinfo((const struct sockaddr *) in_addr,
sizeof(struct sockaddr_in),
&hbuf[0], NI_MAXHOST,
&sbuf[0],NI_MAXSERV,
NI_NUMERICHOST | NI_NUMERICSERV);
return s;
}
|