Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
godotengine
GitHub Repository: godotengine/godot
 Path: blob/master/thirdparty/miniupnpc/src/addr_is_reserved.c
9904 views
1
/* $Id: addr_is_reserved.c,v 1.7 2025/01/12 15:47:17 nanard Exp $ */

2
/* vim: tabstop=4 shiftwidth=4 noexpandtab

3
 * Project : miniupnp

4
 * Web : http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/

5
 * Author : Thomas BERNARD

6
 * copyright (c) 2005-2025 Thomas Bernard

7
 * This software is subjet to the conditions detailed in the

8
 * provided LICENSE file. */

9
#ifdef _WIN32

10
/* Win32 Specific includes and defines */

11
#define WIN32_LEAN_AND_MEAN

12
#include <winsock2.h>

13
#include <ws2tcpip.h>

14
#if !defined(_MSC_VER)

15
#include <stdint.h>

16
#else /* !defined(_MSC_VER) */

17
typedef unsigned long uint32_t;

18
#endif /* !defined(_MSC_VER) */

19
#if !defined(_WIN32_WINNT_VISTA)

20
#define _WIN32_WINNT_VISTA 0x0600

21
#endif

22
#else /* _WIN32 */

23
#include <sys/types.h>

24
#include <sys/socket.h>

25
#include <netinet/in.h>

26
#include <arpa/inet.h>

27
#endif /* _WIN32 */

28
#ifdef DEBUG

29
#include <stdio.h>

30
#endif

31


32
/* List of IP address blocks which are private / reserved and therefore not suitable for public external IP addresses */

33
#define IP(a, b, c, d) (((a) << 24) + ((b) << 16) + ((c) << 8) + (d))

34
#define MSK(m) (32-(m))

35
static const struct { uint32_t address; uint32_t rmask; } reserved[] = {

36
	{ IP(  0,   0,   0, 0), MSK( 8) }, /* RFC1122 "This host on this network" */

37
	{ IP( 10,   0,   0, 0), MSK( 8) }, /* RFC1918 Private-Use */

38
	{ IP(100,  64,   0, 0), MSK(10) }, /* RFC6598 Shared Address Space */

39
	{ IP(127,   0,   0, 0), MSK( 8) }, /* RFC1122 Loopback */

40
	{ IP(169, 254,   0, 0), MSK(16) }, /* RFC3927 Link-Local */

41
	{ IP(172,  16,   0, 0), MSK(12) }, /* RFC1918 Private-Use */

42
	{ IP(192,   0,   0, 0), MSK(24) }, /* RFC6890 IETF Protocol Assignments */

43
	{ IP(192,   0,   2, 0), MSK(24) }, /* RFC5737 Documentation (TEST-NET-1) */

44
	{ IP(192,  31, 196, 0), MSK(24) }, /* RFC7535 AS112-v4 */

45
	{ IP(192,  52, 193, 0), MSK(24) }, /* RFC7450 AMT */

46
	{ IP(192,  88,  99, 0), MSK(24) }, /* RFC7526 6to4 Relay Anycast */

47
	{ IP(192, 168,   0, 0), MSK(16) }, /* RFC1918 Private-Use */

48
	{ IP(192, 175,  48, 0), MSK(24) }, /* RFC7534 Direct Delegation AS112 Service */

49
	{ IP(198,  18,   0, 0), MSK(15) }, /* RFC2544 Benchmarking */

50
	{ IP(198,  51, 100, 0), MSK(24) }, /* RFC5737 Documentation (TEST-NET-2) */

51
	{ IP(203,   0, 113, 0), MSK(24) }, /* RFC5737 Documentation (TEST-NET-3) */

52
	{ IP(224,   0,   0, 0), MSK( 4) }, /* RFC1112 Multicast */

53
	{ IP(240,   0,   0, 0), MSK( 4) }, /* RFC1112 Reserved for Future Use + RFC919 Limited Broadcast */

54
};

55
#undef IP

56
#undef MSK

57


58
/**

59
 * @return 1 or 0

60
 */

61
int addr_is_reserved(const char * addr_str)

62
{

63
	uint32_t addr_n, address;

64
	size_t i;

65


66
#if defined(_WIN32) && (_WIN32_WINNT < _WIN32_WINNT_VISTA)

67
	addr_n = inet_addr(addr_str);

68
	if (addr_n == INADDR_NONE)

69
		return 1;

70
#else

71
	/* was : addr_n = inet_addr(addr_str); */

72
	if (inet_pton(AF_INET, addr_str, &addr_n) <= 0) {

73
		/* error */

74
		return 1;

75
	}

76
#endif

77


78
	address = ntohl(addr_n);

79


80
	for (i = 0; i < sizeof(reserved)/sizeof(reserved[0]); ++i) {

81
		if ((address >> reserved[i].rmask) == (reserved[i].address >> reserved[i].rmask)) {

82
#ifdef DEBUG

83
			printf("IP address %s is reserved\n", addr_str);

84
#endif

85
			return 1;

86
		}

87
	}

88


89
	return 0;

90
}

91


92