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
|
#ifndef fooaddresshfoo
#define fooaddresshfoo
/* $Id$ */
/***
This file is part of avahi.
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
/** \file address.h Definitions and functions to manipulate IP addresses. */
#include <sys/socket.h>
#include <inttypes.h>
#include <avahi-common/cdecl.h>
#ifndef DOXYGEN_SHOULD_SKIP_THIS
AVAHI_C_DECL_BEGIN
#endif
/** Protocol family specification, takes the values AVAHI_PROTO_INET, AVAHI_PROTO_INET6, AVAHI_PROTO_UNSPEC */
typedef int AvahiProtocol;
/** Numeric network interface index. Takes OS dependent values and the special constant AVAHI_IF_UNSPEC */
typedef int AvahiIfIndex;
/** Values for AvahiProtocol */
enum {
AVAHI_PROTO_INET = 0, /**< IPv4 */
AVAHI_PROTO_INET6 = 1, /**< IPv6 */
AVAHI_PROTO_UNSPEC = -1 /**< Unspecified/all protocol(s) */
};
/** Special values for AvahiIfIndex */
enum {
AVAHI_IF_UNSPEC = -1 /**< Unspecified/all interface(s) */
};
/** Maximum size of an address in string form */
#define AVAHI_ADDRESS_STR_MAX 40 /* IPv6 Max = 4*8 + 7 + 1 for NUL */
/** Return TRUE if the specified interface index is valid */
#define AVAHI_IF_VALID(ifindex) (((ifindex) >= 0) || ((ifindex) == AVAHI_PROTO_UNSPEC))
/** Return TRUE if the specified protocol is valid */
#define AVAHI_PROTO_VALID(protocol) (((protocol) == AVAHI_PROTO_INET) || ((protocol) == AVAHI_PROTO_INET6) || ((protocol) == AVAHI_PROTO_UNSPEC))
/** An IPv4 address */
typedef struct {
uint32_t address; /**< Address data in network byte order. */
} AvahiIPv4Address;
/** An IPv6 address */
typedef struct {
uint8_t address[16]; /**< Address data */
} AvahiIPv6Address;
/** Protocol (address family) independent address structure */
typedef struct {
AvahiProtocol proto; /**< Address family */
union {
AvahiIPv6Address ipv6; /** Address when IPv6 */
AvahiIPv4Address ipv4; /** Address when IPv4 */
uint8_t data[1]; /** Type independant data field */
} data;
} AvahiAddress;
/** Return the address data size of the specified address. (4 for IPv4, 16 for IPv6) */
size_t avahi_address_get_size(const AvahiAddress *a);
/** Compare two addresses. Returns 0 when equal, a negative value when a < b, a positive value when a > b. */
int avahi_address_cmp(const AvahiAddress *a, const AvahiAddress *b);
/** Convert the specified address *a to a human readable character string, use AVAHI_ADDRESS_STR_MAX to allocate an array of the right size */
char *avahi_address_snprint(char *ret_s, size_t length, const AvahiAddress *a);
/** Convert the specifeid human readable character string to an
* address structure. Set af to AVAHI_UNSPEC for automatic address
* family detection. */
AvahiAddress *avahi_address_parse(const char *s, AvahiProtocol af, AvahiAddress *ret_addr);
/** Make an address structture of a sockaddr structure */
AvahiAddress *avahi_address_from_sockaddr(const struct sockaddr* sa, AvahiAddress *ret_addr);
/** Return the port number of a sockaddr structure (either IPv4 or IPv6) */
uint16_t avahi_port_from_sockaddr(const struct sockaddr* sa);
/** Generate the DNS reverse lookup name for an IPv4 address. avahi_free() the result! */
char* avahi_reverse_lookup_name_ipv4(const AvahiIPv4Address *a);
/** Generate the modern DNS reverse lookup name for an IPv6 address, ending in ipv6.arpa. avahi_free() the result! */
char* avahi_reverse_lookup_name_ipv6_arpa(const AvahiIPv6Address *a);
/** Generate the historic DNS reverse lookup name for an IPv6 address, ending in ipv6.int. avahi_free() the result! */
char* avahi_reverse_lookup_name_ipv6_int(const AvahiIPv6Address *a);
/** Check whether the specified IPv6 address is in fact an
* encapsulated IPv4 address, returns 1 if yes, 0 otherwise */
int avahi_address_is_ipv4_in_ipv6(const AvahiAddress *a);
/** Map AVAHI_PROTO_xxx constants to Unix AF_xxx constants */
int avahi_proto_to_af(AvahiProtocol proto);
/** Map Unix AF_xxx constants to AVAHI_PROTO_xxx constants */
AvahiProtocol avahi_af_to_proto(int af);
/** Return a textual representation of the specified protocol number. i.e. "IPv4", "IPv6" or "UNSPEC" */
const char* avahi_proto_to_string(AvahiProtocol proto);
#ifndef DOXYGEN_SHOULD_SKIP_THIS
AVAHI_C_DECL_END
#endif
#endif
|
