blob: 73ce7621055f021d808328d6dcfde1a75e9c0a7e (
plain) (
blame)
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
|
/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2018 Julian orth <ju.orth@gmail.com>. All Rights Reserved.
*/
#include <fcntl.h>
#include <stdio.h>
#include <sched.h>
#include <ctype.h>
#include "netns.h"
struct wgnetns netns_current = { 0 };
bool netns_enter(struct wgnetns *netns)
{
int fd = netns->fd;
if (!netns->flags)
return true;
if (netns->flags & WGNETNS_HAS_PID) {
char path[64];
sprintf(path, "/proc/%d/ns/net", netns->pid);
fd = open(path, O_RDONLY);
if (fd == -1) {
perror("Unable to open netns by pid");
return false;
}
}
if (setns(fd, CLONE_NEWNET)) {
perror("setns");
return false;
}
return true;
}
bool netns_parse(struct wgnetns *netns, const char *arg)
{
/* U32 arg -> PID */
if (isdigit(*arg)) {
char *end;
unsigned long pid = strtoul(arg, &end, 10);
if (!*end && pid <= UINT32_MAX) {
netns->pid = pid;
netns->flags |= WGNETNS_HAS_PID;
return true;
}
}
/* Otherwise -> file path */
netns->fd = open(arg, O_RDONLY);
if (netns->fd >= 0) {
netns->flags |= WGNETNS_HAS_FD;
return true;
}
perror("open");
return false;
}
|
