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
|
/*
* Copyright (C) 2011-2015 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ToString.hxx"
#include "Features.hxx"
#include "SocketAddress.hxx"
#include <algorithm>
#ifdef WIN32
#include <ws2tcpip.h>
#else
#include <netdb.h>
#ifdef HAVE_TCP
#include <netinet/in.h>
#endif
#endif
#ifdef HAVE_UN
#include <sys/un.h>
#endif
#include <assert.h>
#include <string.h>
#ifdef HAVE_UN
static std::string
LocalAddressToString(const struct sockaddr_un &s_un, size_t size)
{
const size_t prefix_size = (size_t)
((struct sockaddr_un *)nullptr)->sun_path;
assert(size >= prefix_size);
size_t result_length = size - prefix_size;
/* remove the trailing null terminator */
if (result_length > 0 && s_un.sun_path[result_length - 1] == 0)
--result_length;
if (result_length == 0)
return "local";
std::string result(s_un.sun_path, result_length);
/* replace all null bytes with '@'; this also handles abstract
addresses (Linux specific) */
std::replace(result.begin(), result.end(), '\0', '@');
return result;
}
#endif
#if defined(HAVE_IPV6) && defined(IN6_IS_ADDR_V4MAPPED)
gcc_pure
static bool
IsV4Mapped(SocketAddress address)
{
if (address.GetFamily() != AF_INET6)
return false;
const auto &a6 = *(const struct sockaddr_in6 *)address.GetAddress();
return IN6_IS_ADDR_V4MAPPED(&a6.sin6_addr);
}
/**
* Convert "::ffff:127.0.0.1" to "127.0.0.1".
*/
static SocketAddress
UnmapV4(SocketAddress src, struct sockaddr_in &buffer)
{
assert(IsV4Mapped(src));
const auto &src6 = *(const struct sockaddr_in6 *)src.GetAddress();
memset(&buffer, 0, sizeof(buffer));
buffer.sin_family = AF_INET;
memcpy(&buffer.sin_addr, ((const char *)&src6.sin6_addr) + 12,
sizeof(buffer.sin_addr));
buffer.sin_port = src6.sin6_port;
return { (const struct sockaddr *)&buffer, sizeof(buffer) };
}
#endif
std::string
ToString(SocketAddress address)
{
#ifdef HAVE_UN
if (address.GetFamily() == AF_UNIX)
/* return path of UNIX domain sockets */
return LocalAddressToString(*(const sockaddr_un *)address.GetAddress(),
address.GetSize());
#endif
#if defined(HAVE_IPV6) && defined(IN6_IS_ADDR_V4MAPPED)
struct sockaddr_in in_buffer;
if (IsV4Mapped(address))
address = UnmapV4(address, in_buffer);
#endif
char host[NI_MAXHOST], serv[NI_MAXSERV];
int ret = getnameinfo(address.GetAddress(), address.GetSize(),
host, sizeof(host), serv, sizeof(serv),
NI_NUMERICHOST|NI_NUMERICSERV);
if (ret != 0)
return "unknown";
#ifdef HAVE_IPV6
if (strchr(host, ':') != nullptr) {
std::string result("[");
result.append(host);
result.append("]:");
result.append(serv);
return result;
}
#endif
std::string result(host);
result.push_back(':');
result.append(serv);
return result;
}
|
