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
|
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD 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 General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file core/address.h Wrapper for network addresses. */
#ifndef NETWORK_CORE_ADDRESS_H
#define NETWORK_CORE_ADDRESS_H
#include "os_abstraction.h"
#include "config.h"
#include "../../string_func.h"
#include "../../core/smallmap_type.hpp"
class NetworkAddress;
typedef std::vector<NetworkAddress> NetworkAddressList; ///< Type for a list of addresses.
typedef SmallMap<NetworkAddress, SOCKET> SocketList; ///< Type for a mapping between address and socket.
/**
* Wrapper for (un)resolved network addresses; there's no reason to transform
* a numeric IP to a string and then back again to pass it to functions. It
* furthermore allows easier delaying of the hostname lookup.
*/
class NetworkAddress {
private:
char hostname[NETWORK_HOSTNAME_LENGTH]; ///< The hostname
int address_length; ///< The length of the resolved address
sockaddr_storage address; ///< The resolved address
bool resolved; ///< Whether the address has been (tried to be) resolved
/**
* Helper function to resolve something to a socket.
* @param runp information about the socket to try not
* @return the opened socket or INVALID_SOCKET
*/
typedef SOCKET (*LoopProc)(addrinfo *runp);
SOCKET Resolve(int family, int socktype, int flags, SocketList *sockets, LoopProc func);
public:
/**
* Create a network address based on a resolved IP and port.
* @param address The IP address with port.
* @param address_length The length of the address.
*/
NetworkAddress(struct sockaddr_storage &address, int address_length) :
address_length(address_length),
address(address),
resolved(address_length != 0)
{
*this->hostname = '\0';
}
/**
* Create a network address based on a resolved IP and port.
* @param address The IP address with port.
* @param address_length The length of the address.
*/
NetworkAddress(sockaddr *address, int address_length) :
address_length(address_length),
resolved(address_length != 0)
{
*this->hostname = '\0';
memset(&this->address, 0, sizeof(this->address));
memcpy(&this->address, address, address_length);
}
/**
* Create a network address based on a unresolved host and port
* @param hostname the unresolved hostname
* @param port the port
* @param family the address family
*/
NetworkAddress(const char *hostname = "", uint16 port = 0, int family = AF_UNSPEC) :
address_length(0),
resolved(false)
{
/* Also handle IPv6 bracket enclosed hostnames */
if (StrEmpty(hostname)) hostname = "";
if (*hostname == '[') hostname++;
strecpy(this->hostname, StrEmpty(hostname) ? "" : hostname, lastof(this->hostname));
char *tmp = strrchr(this->hostname, ']');
if (tmp != nullptr) *tmp = '\0';
memset(&this->address, 0, sizeof(this->address));
this->address.ss_family = family;
this->SetPort(port);
}
const char *GetHostname();
void GetAddressAsString(char *buffer, const char *last, bool with_family = true);
const char *GetAddressAsString(bool with_family = true);
const sockaddr_storage *GetAddress();
/**
* Get the (valid) length of the address.
* @return the length
*/
int GetAddressLength()
{
/* Resolve it if we didn't do it already */
if (!this->IsResolved()) this->GetAddress();
return this->address_length;
}
uint16 GetPort() const;
void SetPort(uint16 port);
/**
* Check whether the IP address has been resolved already
* @return true iff the port has been resolved
*/
bool IsResolved() const
{
return this->resolved;
}
bool IsFamily(int family);
bool IsInNetmask(const char *netmask);
/**
* Compare the address of this class with the address of another.
* @param address the other address.
* @return < 0 if address is less, 0 if equal and > 0 if address is more
*/
int CompareTo(NetworkAddress &address)
{
int r = this->GetAddressLength() - address.GetAddressLength();
if (r == 0) r = this->address.ss_family - address.address.ss_family;
if (r == 0) r = memcmp(&this->address, &address.address, this->address_length);
if (r == 0) r = this->GetPort() - address.GetPort();
return r;
}
/**
* Compare the address of this class with the address of another.
* @param address the other address.
* @return true if both match.
*/
bool operator == (NetworkAddress &address)
{
return this->CompareTo(address) == 0;
}
/**
* Compare the address of this class with the address of another.
* @param address the other address.
* @return true if both match.
*/
bool operator == (NetworkAddress &address) const
{
return const_cast<NetworkAddress*>(this)->CompareTo(address) == 0;
}
/**
* Compare the address of this class with the address of another.
* @param address the other address.
* @return true if both do not match.
*/
bool operator != (NetworkAddress address) const
{
return const_cast<NetworkAddress*>(this)->CompareTo(address) != 0;
}
/**
* Compare the address of this class with the address of another.
* @param address the other address.
*/
bool operator < (NetworkAddress &address)
{
return this->CompareTo(address) < 0;
}
SOCKET Connect();
void Listen(int socktype, SocketList *sockets);
static const char *SocketTypeAsString(int socktype);
static const char *AddressFamilyAsString(int family);
};
#endif /* NETWORK_CORE_ADDRESS_H */
|
