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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/* Copyright (c) 2003-2004, Roger Dingledine
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2012, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file address.h
* \brief Headers for address.h
**/
#ifndef _TOR_ADDRESS_H
#define _TOR_ADDRESS_H
#include "orconfig.h"
#include "torint.h"
#include "compat.h"
/** The number of bits from an address to consider while doing a masked
* comparison. */
typedef uint8_t maskbits_t;
struct in_addr;
/** Holds an IPv4 or IPv6 address. (Uses less memory than struct
* sockaddr_storage.) */
typedef struct tor_addr_t
{
sa_family_t family;
union {
uint32_t dummy_; /* This field is here so we have something to initialize
* with a reliable cross-platform type. */
struct in_addr in_addr;
struct in6_addr in6_addr;
} addr;
} tor_addr_t;
/** Holds an IP address and a TCP/UDP port. */
typedef struct tor_addr_port_t
{
tor_addr_t addr;
uint16_t port;
} tor_addr_port_t;
#define TOR_ADDR_NULL {AF_UNSPEC, {0}};
static INLINE const struct in6_addr *tor_addr_to_in6(const tor_addr_t *a);
static INLINE uint32_t tor_addr_to_ipv4n(const tor_addr_t *a);
static INLINE uint32_t tor_addr_to_ipv4h(const tor_addr_t *a);
static INLINE uint32_t tor_addr_to_mapped_ipv4h(const tor_addr_t *a);
static INLINE sa_family_t tor_addr_family(const tor_addr_t *a);
static INLINE const struct in_addr *tor_addr_to_in(const tor_addr_t *a);
static INLINE int tor_addr_eq_ipv4h(const tor_addr_t *a, uint32_t u);
socklen_t tor_addr_to_sockaddr(const tor_addr_t *a, uint16_t port,
struct sockaddr *sa_out, socklen_t len);
int tor_addr_from_sockaddr(tor_addr_t *a, const struct sockaddr *sa,
uint16_t *port_out);
void tor_addr_make_unspec(tor_addr_t *a);
char *tor_sockaddr_to_str(const struct sockaddr *sa);
/** Return an in6_addr* equivalent to <b>a</b>, or NULL if <b>a</b> is not
* an IPv6 address. */
static INLINE const struct in6_addr *
tor_addr_to_in6(const tor_addr_t *a)
{
return a->family == AF_INET6 ? &a->addr.in6_addr : NULL;
}
/** Given an IPv6 address <b>x</b>, yield it as an array of uint8_t.
*
* Requires that <b>x</b> is actually an IPv6 address.
*/
#define tor_addr_to_in6_addr8(x) tor_addr_to_in6(x)->s6_addr
/** Given an IPv6 address <b>x</b>, yield it as an array of uint16_t.
*
* Requires that <b>x</b> is actually an IPv6 address.
*/
#define tor_addr_to_in6_addr16(x) S6_ADDR16(*tor_addr_to_in6(x))
/** Given an IPv6 address <b>x</b>, yield it as an array of uint32_t.
*
* Requires that <b>x</b> is actually an IPv6 address.
*/
#define tor_addr_to_in6_addr32(x) S6_ADDR32(*tor_addr_to_in6(x))
/** Return an IPv4 address in network order for <b>a</b>, or 0 if
* <b>a</b> is not an IPv4 address. */
static INLINE uint32_t
tor_addr_to_ipv4n(const tor_addr_t *a)
{
return a->family == AF_INET ? a->addr.in_addr.s_addr : 0;
}
/** Return an IPv4 address in host order for <b>a</b>, or 0 if
* <b>a</b> is not an IPv4 address. */
static INLINE uint32_t
tor_addr_to_ipv4h(const tor_addr_t *a)
{
return ntohl(tor_addr_to_ipv4n(a));
}
/** Given an IPv6 address, return its mapped IPv4 address in host order, or
* 0 if <b>a</b> is not an IPv6 address.
*
* (Does not check whether the address is really a mapped address */
static INLINE uint32_t
tor_addr_to_mapped_ipv4h(const tor_addr_t *a)
{
return a->family == AF_INET6 ? ntohl(tor_addr_to_in6_addr32(a)[3]) : 0;
}
/** Return the address family of <b>a</b>. Possible values are:
* AF_INET6, AF_INET, AF_UNSPEC. */
static INLINE sa_family_t
tor_addr_family(const tor_addr_t *a)
{
return a->family;
}
/** Return an in_addr* equivalent to <b>a</b>, or NULL if <b>a</b> is not
* an IPv4 address. */
static INLINE const struct in_addr *
tor_addr_to_in(const tor_addr_t *a)
{
return a->family == AF_INET ? &a->addr.in_addr : NULL;
}
/** Return true iff <b>a</b> is an IPv4 address equal to the host-ordered
* address in <b>u</b>. */
static INLINE int
tor_addr_eq_ipv4h(const tor_addr_t *a, uint32_t u)
{
return a->family == AF_INET ? (tor_addr_to_ipv4h(a) == u) : 0;
}
/** Length of a buffer that you need to allocate to be sure you can encode
* any tor_addr_t.
*
* This allows enough space for
* "[ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255]",
* plus a terminating NUL.
*/
#define TOR_ADDR_BUF_LEN 48
int tor_addr_lookup(const char *name, uint16_t family, tor_addr_t *addr_out);
char *tor_dup_addr(const tor_addr_t *addr) ATTR_MALLOC;
/** Wrapper function of fmt_addr_impl(). It does not decorate IPv6
* addresses. */
#define fmt_addr(a) fmt_addr_impl((a), 0)
/** Wrapper function of fmt_addr_impl(). It decorates IPv6
* addresses. */
#define fmt_and_decorate_addr(a) fmt_addr_impl((a), 1)
const char *fmt_addr_impl(const tor_addr_t *addr, int decorate);
const char * fmt_addr32(uint32_t addr);
int get_interface_address6(int severity, sa_family_t family, tor_addr_t *addr);
/** Flag to specify how to do a comparison between addresses. In an "exact"
* comparison, addresses are equivalent only if they are in the same family
* with the same value. In a "semantic" comparison, IPv4 addresses match all
* IPv6 encodings of those addresses. */
typedef enum {
CMP_EXACT,
CMP_SEMANTIC,
} tor_addr_comparison_t;
int tor_addr_compare(const tor_addr_t *addr1, const tor_addr_t *addr2,
tor_addr_comparison_t how);
int tor_addr_compare_masked(const tor_addr_t *addr1, const tor_addr_t *addr2,
maskbits_t mask, tor_addr_comparison_t how);
/** Return true iff a and b are the same address. The comparison is done
* "exactly". */
#define tor_addr_eq(a,b) (0==tor_addr_compare((a),(b),CMP_EXACT))
unsigned int tor_addr_hash(const tor_addr_t *addr);
int tor_addr_is_v4(const tor_addr_t *addr);
int tor_addr_is_internal(const tor_addr_t *ip, int for_listening);
/** Longest length that can be required for a reverse lookup name. */
/* 32 nybbles, 32 dots, 8 characters of "ip6.arpa", 1 NUL: 73 characters. */
#define REVERSE_LOOKUP_NAME_BUF_LEN 73
int tor_addr_to_PTR_name(char *out, size_t outlen,
const tor_addr_t *addr);
int tor_addr_parse_PTR_name(tor_addr_t *result, const char *address,
int family, int accept_regular);
int tor_addr_port_lookup(const char *s, tor_addr_t *addr_out,
uint16_t *port_out);
int tor_addr_parse_mask_ports(const char *s,
tor_addr_t *addr_out, maskbits_t *mask_out,
uint16_t *port_min_out, uint16_t *port_max_out);
const char * tor_addr_to_str(char *dest, const tor_addr_t *addr, size_t len,
int decorate);
int tor_addr_parse(tor_addr_t *addr, const char *src);
void tor_addr_copy(tor_addr_t *dest, const tor_addr_t *src);
void tor_addr_from_ipv4n(tor_addr_t *dest, uint32_t v4addr);
/** Set <b>dest</b> to the IPv4 address encoded in <b>v4addr</b> in host
* order. */
#define tor_addr_from_ipv4h(dest, v4addr) \
tor_addr_from_ipv4n((dest), htonl(v4addr))
void tor_addr_from_ipv6_bytes(tor_addr_t *dest, const char *bytes);
/** Set <b>dest</b> to the IPv4 address incoded in <b>in</b>. */
#define tor_addr_from_in(dest, in) \
tor_addr_from_ipv4n((dest), (in)->s_addr);
void tor_addr_from_in6(tor_addr_t *dest, const struct in6_addr *in6);
int tor_addr_is_null(const tor_addr_t *addr);
int tor_addr_is_loopback(const tor_addr_t *addr);
int tor_addr_port_split(int severity, const char *addrport,
char **address_out, uint16_t *port_out);
int tor_addr_hostname_is_local(const char *name);
/* IPv4 helpers */
int is_internal_IP(uint32_t ip, int for_listening);
int addr_port_lookup(int severity, const char *addrport, char **address,
uint32_t *addr, uint16_t *port_out);
int parse_port_range(const char *port, uint16_t *port_min_out,
uint16_t *port_max_out);
int parse_addr_and_port_range(const char *s, uint32_t *addr_out,
maskbits_t *maskbits_out, uint16_t *port_min_out,
uint16_t *port_max_out);
int addr_mask_get_bits(uint32_t mask);
int addr_mask_cmp_bits(uint32_t a1, uint32_t a2, maskbits_t bits);
/** Length of a buffer to allocate to hold the results of tor_inet_ntoa.*/
#define INET_NTOA_BUF_LEN 16
int tor_inet_ntoa(const struct in_addr *in, char *buf, size_t buf_len);
char *tor_dup_ip(uint32_t addr) ATTR_MALLOC;
int get_interface_address(int severity, uint32_t *addr);
#endif
|