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
|
// +build android
package main
/*
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/uio.h>
#define ANCIL_FD_BUFFER(n) \
struct { \
struct cmsghdr h; \
int fd[n]; \
}
int
ancil_send_fds_with_buffer(int sock, const int *fds, unsigned n_fds, void *buffer)
{
struct msghdr msghdr;
char nothing = '!';
struct iovec nothing_ptr;
struct cmsghdr *cmsg;
int i;
nothing_ptr.iov_base = ¬hing;
nothing_ptr.iov_len = 1;
msghdr.msg_name = NULL;
msghdr.msg_namelen = 0;
msghdr.msg_iov = ¬hing_ptr;
msghdr.msg_iovlen = 1;
msghdr.msg_flags = 0;
msghdr.msg_control = buffer;
msghdr.msg_controllen = sizeof(struct cmsghdr) + sizeof(int) * n_fds;
cmsg = CMSG_FIRSTHDR(&msghdr);
cmsg->cmsg_len = msghdr.msg_controllen;
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
for(i = 0; i < n_fds; i++)
((int *)CMSG_DATA(cmsg))[i] = fds[i];
return(sendmsg(sock, &msghdr, 0) >= 0 ? 0 : -1);
}
int
ancil_send_fd(int sock, int fd)
{
ANCIL_FD_BUFFER(1) buffer;
return(ancil_send_fds_with_buffer(sock, &fd, 1, &buffer));
}
void
set_timeout(int sock)
{
struct timeval tv;
tv.tv_sec = 3;
tv.tv_usec = 0;
setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv, sizeof(struct timeval));
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, sizeof(struct timeval));
}
*/
import "C"
import (
"log"
"syscall"
vinternet "v2ray.com/core/transport/internet"
)
func ControlOnConnSetup(network string, address string, s uintptr) error {
fd := int(s)
path := "protect_path"
socket, err := syscall.Socket(syscall.AF_UNIX, syscall.SOCK_STREAM, 0)
if err != nil {
log.Println(err)
return err
}
defer syscall.Close(socket)
C.set_timeout(C.int(socket))
err = syscall.Connect(socket, &syscall.SockaddrUnix{Name: path})
if err != nil {
log.Println(err)
return err
}
C.ancil_send_fd(C.int(socket), C.int(fd))
dummy := []byte{1}
n, err := syscall.Read(socket, dummy)
if err != nil {
log.Println(err)
return err
}
if n != 1 {
log.Println("Failed to protect fd: ", fd)
}
return nil
}
func registerControlFunc() {
vinternet.RegisterDialerController(ControlOnConnSetup)
vinternet.RegisterListenerController(ControlOnConnSetup)
}
|
