summaryrefslogtreecommitdiffhomepage
path: root/src/tests/qemu/init.c
blob: d23ec379e8b516ee8a3bbb77f84e750ce5132b15 (plain)
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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
/* Copyright (C) 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */

#define _GNU_SOURCE
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/io.h>
#include <sys/ioctl.h>
#include <sys/reboot.h>
#include <sys/utsname.h>
#include <linux/random.h>
#include <linux/version.h>

 __attribute__((noreturn)) static void poweroff(void)
{
	fflush(stdout);
	fflush(stderr);
	ioperm(0x604, 2, 1);
	outw(1 << 13, 0x604);
	sleep(30);
	fprintf(stderr, "\x1b[37m\x1b[41m\x1b[1mFailed to power off!!!\x1b[0m\n");
	exit(1);
}

static void panic(const char *what)
{
	fprintf(stderr, "\n\n\x1b[37m\x1b[41m\x1b[1mSOMETHING WENT HORRIBLY WRONG\x1b[0m\n\n    \x1b[31m\x1b[1m%s: %s\x1b[0m\n\n\x1b[37m\x1b[44m\x1b[1mPower off...\x1b[0m\n\n", what, strerror(errno));
	poweroff();
}

#define pretty_message(msg) puts("\x1b[32m\x1b[1m" msg "\x1b[0m")

static void print_banner(const struct utsname *utsname)
{
	int len = strlen("    WireGuard Test Suite on      ") + strlen(utsname->sysname) + strlen(utsname->release);
	printf("\x1b[45m\x1b[33m\x1b[1m%*.s\x1b[0m\n\x1b[45m\x1b[33m\x1b[1m    WireGuard Test Suite on %s %s    \x1b[0m\n\x1b[45m\x1b[33m\x1b[1m%*.s\x1b[0m\n\n", len, "", utsname->sysname, utsname->release, len, "");
}

static void seed_rng(void)
{
	int fd1, fd2, i;
	struct {
		int entropy_count;
		int buffer_size;
		unsigned char buffer[128];
	} entropy = {
		.entropy_count = 128,
		.buffer_size = 128
	};
	pretty_message("[+] Ensuring RNG entropy...");
	fd1 = open("/dev/hwrng", O_RDONLY);
	fd2 = open("/dev/urandom", O_WRONLY);
	if (fd1 < 0 || fd2 < 0)
		panic("open(hwrng,urandom)");
	for (i = 0; i < 4096; ++i) {
		if (read(fd1, entropy.buffer, 128) != 128)
			panic("read(hwrng)");
		if (ioctl(fd2, RNDADDENTROPY, &entropy) < 0)
			panic("ioctl(urandom)");
	}
	close(fd1);
	close(fd2);
}

static void mount_filesystems(void)
{
	pretty_message("[+] Mounting filesystems...");
	mkdir("/dev", 0755);
	mkdir("/proc", 0755);
	mkdir("/sys", 0755);
	mkdir("/tmp", 0755);
	mkdir("/run", 0755);
	mkdir("/var", 0755);
	if (mount("none", "/dev", "devtmpfs", 0, NULL))
		panic("devtmpfs mount");
	if (mount("none", "/proc", "proc", 0, NULL))
		panic("procfs mount");
	if (mount("none", "/sys", "sysfs", 0, NULL))
		panic("sysfs mount");
	if (mount("none", "/tmp", "tmpfs", 0, NULL))
		panic("tmpfs mount");
	if (mount("none", "/run", "tmpfs", 0, NULL))
		panic("tmpfs mount");
	if (symlink("/run", "/var/run"))
		panic("run symlink");
	if (symlink("/proc/self/fd", "/dev/fd"))
		panic("fd symlink");
}

static void enable_logging(void)
{
	int fd;
	pretty_message("[+] Enabling logging...");
	fd = open("/proc/sys/kernel/printk", O_WRONLY);
	if (fd < 0)
		panic("open(printk)");
	if (write(fd, "9\n", 2) != 2)
		panic("write(printk)");
	close(fd);
}

static void kmod_selftests(void)
{
	FILE *file;
	char line[2048], *start, *pass;
	bool success = true;
	pretty_message("[+] Module self-tests:");
	file = fopen("/proc/kmsg", "r");
	if (!file)
		panic("fopen(kmsg)");
	if (fcntl(fileno(file), F_SETFL, O_NONBLOCK) < 0)
		panic("fcntl(kmsg, nonblock)");
	while (fgets(line, sizeof(line), file)) {
		start = strstr(line, "wireguard: ");
		if (!start)
			continue;
		start += 11;
		*strchrnul(start, '\n') = '\0';
		if (strstr(start, "www.wireguard.io"))
			break;
		pass = strstr(start, ": pass");
		if (!pass || pass[6] != '\0') {
			success = false;
			printf(" \x1b[31m*  %s\x1b[0m\n", start);
		} else
			printf(" \x1b[32m*  %s\x1b[0m\n", start);
	}
	fclose(file);
	if (!success) {
		puts("\x1b[31m\x1b[1m[-] Tests failed! :-(\x1b[0m");
		poweroff();
	}
}

static void launch_tests(void)
{
	int status, fd;
	pid_t pid;
	pretty_message("[+] Launching tests...");
	pid = fork();
	if (pid == -1)
		panic("fork");
	else if (pid == 0) {
		execl("/init.sh", "init", NULL);
		panic("exec");
	}
	if (waitpid(pid, &status, 0) < 0)
		panic("waitpid");
	if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
		pretty_message("[+] Tests successful! :-)");
		fd = open("/dev/vport1p1", O_WRONLY);
		if (fd < 0)
			panic("open(vport1p1)");
		if (write(fd, "success\n", 8) != 8)
			panic("write(success)");
		close(fd);
	} else
		puts("\x1b[31m\x1b[1m[-] Tests failed! :-(\x1b[0m");
}

static bool linux_4_8_or_higher(const struct utsname *utsname)
{
	unsigned int maj, min, rel;
	if (strcmp(utsname->sysname, "Linux"))
		return false;
	if (sscanf(utsname->release, "%u.%u.%u", &maj, &min, &rel) != 3)
		return false;
	return KERNEL_VERSION(maj, min, rel) >= KERNEL_VERSION(4, 8, 0);
}

int main(int argc, char *argv[])
{
	struct utsname utsname;

	if (write(1, "\0\0\0\0\n", 5) < 0)
		reboot(RB_AUTOBOOT);

	if (uname(&utsname) < 0)
		panic("uname");
	print_banner(&utsname);
	mount_filesystems();
	kmod_selftests();
	if (!linux_4_8_or_higher(&utsname))
		seed_rng();
	enable_logging();
	launch_tests();
	poweroff();
	return 1;
}