diff options
Diffstat (limited to 'thirdparty/miniupnpc/src/addr_is_reserved.c')
| -rw-r--r-- | thirdparty/miniupnpc/src/addr_is_reserved.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/thirdparty/miniupnpc/src/addr_is_reserved.c b/thirdparty/miniupnpc/src/addr_is_reserved.c new file mode 100644 index 0000000000..18c6424201 --- /dev/null +++ b/thirdparty/miniupnpc/src/addr_is_reserved.c @@ -0,0 +1,79 @@ +/* $Id: addr_is_reserved.c,v 1.4 2021/03/02 23:40:32 nanard Exp $ */ +/* vim: tabstop=4 shiftwidth=4 noexpandtab + * Project : miniupnp + * Web : http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/ + * Author : Thomas BERNARD + * copyright (c) 2005-2021 Thomas Bernard + * This software is subjet to the conditions detailed in the + * provided LICENSE file. */ +#ifdef _WIN32 +/* Win32 Specific includes and defines */ +#include <winsock2.h> +#include <ws2tcpip.h> +#if !defined(_MSC_VER) +#include <stdint.h> +#else /* !defined(_MSC_VER) */ +typedef unsigned long uint32_t; +#endif /* !defined(_MSC_VER) */ +#else /* _WIN32 */ +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#endif /* _WIN32 */ + +/* List of IP address blocks which are private / reserved and therefore not suitable for public external IP addresses */ +#define IP(a, b, c, d) (((a) << 24) + ((b) << 16) + ((c) << 8) + (d)) +#define MSK(m) (32-(m)) +static const struct { uint32_t address; uint32_t rmask; } reserved[] = { + { IP( 0, 0, 0, 0), MSK( 8) }, /* RFC1122 "This host on this network" */ + { IP( 10, 0, 0, 0), MSK( 8) }, /* RFC1918 Private-Use */ + { IP(100, 64, 0, 0), MSK(10) }, /* RFC6598 Shared Address Space */ + { IP(127, 0, 0, 0), MSK( 8) }, /* RFC1122 Loopback */ + { IP(169, 254, 0, 0), MSK(16) }, /* RFC3927 Link-Local */ + { IP(172, 16, 0, 0), MSK(12) }, /* RFC1918 Private-Use */ + { IP(192, 0, 0, 0), MSK(24) }, /* RFC6890 IETF Protocol Assignments */ + { IP(192, 0, 2, 0), MSK(24) }, /* RFC5737 Documentation (TEST-NET-1) */ + { IP(192, 31, 196, 0), MSK(24) }, /* RFC7535 AS112-v4 */ + { IP(192, 52, 193, 0), MSK(24) }, /* RFC7450 AMT */ + { IP(192, 88, 99, 0), MSK(24) }, /* RFC7526 6to4 Relay Anycast */ + { IP(192, 168, 0, 0), MSK(16) }, /* RFC1918 Private-Use */ + { IP(192, 175, 48, 0), MSK(24) }, /* RFC7534 Direct Delegation AS112 Service */ + { IP(198, 18, 0, 0), MSK(15) }, /* RFC2544 Benchmarking */ + { IP(198, 51, 100, 0), MSK(24) }, /* RFC5737 Documentation (TEST-NET-2) */ + { IP(203, 0, 113, 0), MSK(24) }, /* RFC5737 Documentation (TEST-NET-3) */ + { IP(224, 0, 0, 0), MSK( 4) }, /* RFC1112 Multicast */ + { IP(240, 0, 0, 0), MSK( 4) }, /* RFC1112 Reserved for Future Use + RFC919 Limited Broadcast */ +}; +#undef IP +#undef MSK + +/** + * @return 1 or 0 + */ +int addr_is_reserved(const char * addr_str) +{ + uint32_t addr_n, address; + size_t i; + +#if defined(_WIN32) && _WIN32_WINNT < 0x0600 // _WIN32_WINNT_VISTA + addr_n = inet_addr(addr_str); + if (addr_n == INADDR_NONE) + return 1; +#else + /* was : addr_n = inet_addr(addr_str); */ + if (inet_pton(AF_INET, addr_str, &addr_n) <= 0) { + /* error */ + return 1; + } +#endif + + address = ntohl(addr_n); + + for (i = 0; i < sizeof(reserved)/sizeof(reserved[0]); ++i) { + if ((address >> reserved[i].rmask) == (reserved[i].address >> reserved[i].rmask)) + return 1; + } + + return 0; +} |