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
|
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netdb.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include "usock.h"
int usock(int type, const char *host, const char *service) {
int sock = -1;
if (service && !(type & USOCK_UNIX)) {
struct addrinfo *result, *rp;
struct addrinfo hints = {
.ai_family = (type & USOCK_IPV6ONLY) ? AF_INET6 :
(type & USOCK_IPV4ONLY) ? AF_INET : AF_UNSPEC,
.ai_socktype = ((type & 0xff) == USOCK_TCP)
? SOCK_STREAM : SOCK_DGRAM,
.ai_flags = AI_ADDRCONFIG
| ((type & USOCK_SERVER) ? AI_PASSIVE : 0)
| ((type & USOCK_NUMERIC) ? AI_NUMERICHOST : 0),
};
if (getaddrinfo(host, service, &hints, &result)) {
return -1;
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
if ((sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol))
== -1) {
continue;
}
if (!(type & USOCK_NOCLOEXEC)) {
fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC);
}
if (type & USOCK_NONBLOCK) {
fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK);
}
if (type & USOCK_SERVER) {
const int one = 1;
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
if (!bind(sock, rp->ai_addr, rp->ai_addrlen)
&& ((type & 0xff) != USOCK_TCP || !listen(sock, SOMAXCONN))) {
break;
}
} else {
if (!connect(sock, rp->ai_addr, rp->ai_addrlen)
|| errno == EINPROGRESS) {
break;
}
}
close(sock);
sock = -1;
}
freeaddrinfo(result);
} else {
struct sockaddr_un sun = {.sun_family = AF_UNIX};
if (strlen(host) >= sizeof(sun.sun_path)) {
errno = EINVAL;
return -1;
}
strcpy(sun.sun_path, host);
if ((sock = socket(AF_UNIX, ((type & 0xff) == USOCK_TCP)
? SOCK_STREAM : SOCK_DGRAM, 0)) == -1) {
return -1;
}
if (!(type & USOCK_NOCLOEXEC)) {
fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC);
}
if (type & USOCK_NONBLOCK) {
fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK);
}
if (type & USOCK_SERVER) {
if (bind(sock, (struct sockaddr*)&sun, sizeof(sun)) ||
((type & 0xff) == USOCK_TCP && listen(sock, SOMAXCONN))) {
close(sock);
return -1;
}
} else {
if (connect(sock, (struct sockaddr*)&sun, sizeof(sun))
&& errno != EINPROGRESS) {
close(sock);
return -1;
}
}
}
return sock;
}
|
