summaryrefslogtreecommitdiff
path: root/src/socket.cpp
blob: fa5f0709c2e0a87c83d1da509f88939055b33484 (plain)
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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
 * See: http://www.inspircd.org/wiki/index.php/Credits
 *
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

/* $Core */

#include "inspircd.h"
#include "socket.h"
#include "socketengine.h"

/** This will bind a socket to a port. It works for UDP/TCP.
 * It can only bind to IP addresses, if you wish to bind to hostnames
 * you should first resolve them using class 'Resolver'.
 */ 
bool InspIRCd::BindSocket(int sockfd, int port, const char* addr, bool dolisten)
{
	/* We allocate 2 of these, because sockaddr_in6 is larger than sockaddr (ugh, hax) */
	sockaddr* servaddr = new sockaddr[2];
	memset(servaddr,0,sizeof(sockaddr)*2);

	int ret, size;

	if (*addr == '*')
		addr = "";

#ifdef IPV6
	if (*addr)
	{
		/* There is an address here. Is it ipv6? */
		if (strchr(addr,':'))
		{
			/* Yes it is */
			in6_addr addy;
			if (inet_pton(AF_INET6, addr, &addy) < 1)
			{
				delete[] servaddr;
				return false;
			}

			((sockaddr_in6*)servaddr)->sin6_family = AF_INET6;
			memcpy(&(((sockaddr_in6*)servaddr)->sin6_addr), &addy, sizeof(in6_addr));
			((sockaddr_in6*)servaddr)->sin6_port = htons(port);
			size = sizeof(sockaddr_in6);
		}
		else
		{
			/* No, its not */
			in_addr addy;
			if (inet_pton(AF_INET, addr, &addy) < 1)
			{
				delete[] servaddr;
				return false;
			}

			((sockaddr_in*)servaddr)->sin_family = AF_INET;
			((sockaddr_in*)servaddr)->sin_addr = addy;
			((sockaddr_in*)servaddr)->sin_port = htons(port);
			size = sizeof(sockaddr_in);
		}
	}
	else
	{
		if (port == -1)
		{
			/* Port -1: Means UDP IPV4 port binding - Special case
			 * used by DNS engine.
			 */
			((sockaddr_in*)servaddr)->sin_family = AF_INET;
			((sockaddr_in*)servaddr)->sin_addr.s_addr = htonl(INADDR_ANY);
			((sockaddr_in*)servaddr)->sin_port = 0;
			size = sizeof(sockaddr_in);
		}
		else
		{
			/* Theres no address here, default to ipv6 bind to all */
			((sockaddr_in6*)servaddr)->sin6_family = AF_INET6;
			memset(&(((sockaddr_in6*)servaddr)->sin6_addr), 0, sizeof(in6_addr));
			((sockaddr_in6*)servaddr)->sin6_port = htons(port);
			size = sizeof(sockaddr_in6);
		}
	}
#else
	/* If we aren't built with ipv6, the choice becomes simple */
	((sockaddr_in*)servaddr)->sin_family = AF_INET;
	if (*addr)
	{
		/* There is an address here. */
		in_addr addy;
		if (inet_pton(AF_INET, addr, &addy) < 1)
		{
			delete[] servaddr;
			return false;
		}
		((sockaddr_in*)servaddr)->sin_addr = addy;
	}
	else
	{
		/* Bind ipv4 to all */
		((sockaddr_in*)servaddr)->sin_addr.s_addr = htonl(INADDR_ANY);
	}
	/* Bind ipv4 port number */
	((sockaddr_in*)servaddr)->sin_port = htons(port);
	size = sizeof(sockaddr_in);
#endif
	ret = SE->Bind(sockfd, servaddr, size);
	delete[] servaddr;

	if (ret < 0)
	{
		return false;
	}
	else
	{
		if (dolisten)
		{
			if (SE->Listen(sockfd, Config->MaxConn) == -1)
			{
				this->Logs->Log("SOCKET",DEFAULT,"ERROR in listen(): %s",strerror(errno));
				return false;
			}
			else
			{
				this->Logs->Log("SOCKET",DEBUG,"New socket binding for %d with listen: %s:%d", sockfd, addr, port);
				SE->NonBlocking(sockfd);
				return true;
			}
		}
		else
		{
			this->Logs->Log("SOCKET",DEBUG,"New socket binding for %d without listen: %s:%d", sockfd, addr, port);
			return true;
		}
	}
}

// Open a TCP Socket
int irc::sockets::OpenTCPSocket(const char* addr, int socktype)
{
	int sockfd;
	int on = 1;
	addr = addr;
	struct linger linger = { 0, 0 };
#ifdef IPV6
	if (!*addr)
	{
		sockfd = socket (PF_INET6, socktype, 0);
		if (sockfd < 0)
			sockfd = socket (PF_INET, socktype, 0);
	}
	else if (strchr(addr,':'))
		sockfd = socket (PF_INET6, socktype, 0);
	else
		sockfd = socket (PF_INET, socktype, 0);
	if (sockfd < 0)
#else
	if ((sockfd = socket (PF_INET, socktype, 0)) < 0)
#endif
	{
		return ERROR;
	}
	else
	{
		setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on));
		/* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
		linger.l_onoff = 1;
		linger.l_linger = 1;
		setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (char*)&linger,sizeof(linger));
		return (sockfd);
	}
}

// XXX: it would be VERY nice to genericize this so all listen stuff (server/client) could use the one function. -- w00t
int InspIRCd::BindPorts(bool, int &ports_found, FailedPortList &failed_ports)
{
	char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
	int bound = 0;
	bool started_with_nothing = (Config->ports.size() == 0);
	std::vector<std::pair<std::string, int> > old_ports;

	/* XXX: Make a copy of the old ip/port pairs here */
	for (std::vector<ListenSocketBase *>::iterator o = Config->ports.begin(); o != Config->ports.end(); ++o)
		old_ports.push_back(make_pair((*o)->GetIP(), (*o)->GetPort()));

	for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
	{
		Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
		Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
		Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
		
		if (strncmp(Addr, "::ffff:", 7) == 0)
			this->Logs->Log("SOCKET",DEFAULT, "Using 4in6 (::ffff:) isn't recommended. You should bind IPv4 addresses directly instead.");
		
		if ((!*Type) || (!strcmp(Type,"clients")))
		{
			irc::portparser portrange(configToken, false);
			int portno = -1;
			while (0 != (portno = portrange.GetToken()))
			{
				if (*Addr == '*')
					*Addr = 0;

				bool skip = false;
				for (std::vector<ListenSocketBase *>::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n)
				{
					if (((*n)->GetIP() == Addr) && ((*n)->GetPort() == portno))
					{
						skip = true;
						/* XXX: Here, erase from our copy of the list */
						for (std::vector<std::pair<std::string, int> >::iterator k = old_ports.begin(); k != old_ports.end(); ++k)
						{
							if ((k->first == Addr) && (k->second == portno))
							{
								old_ports.erase(k);
								break;
							}
						}
					}
				}
				if (!skip)
				{
					ClientListenSocket *ll = new ClientListenSocket(this, portno, Addr);
					if (ll->GetFd() > -1)
					{
						bound++;
						Config->ports.push_back(ll);
					}
					else
					{
						failed_ports.push_back(std::make_pair((*Addr ? Addr : "*") + std::string(":") + ConvToStr(portno), strerror(errno)));
					}
					ports_found++;
				}
			}
		}
	}

	/* XXX: Here, anything left in our copy list, close as removed */
	if (!started_with_nothing)
	{
		for (size_t k = 0; k < old_ports.size(); ++k)
		{
			for (std::vector<ListenSocketBase *>::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n)
			{
				if (((*n)->GetIP() == old_ports[k].first) && ((*n)->GetPort() == old_ports[k].second))
				{
					this->Logs->Log("SOCKET",DEFAULT,"Port binding %s:%d was removed from the config file, closing.", old_ports[k].first.c_str(), old_ports[k].second);
					delete *n;
					Config->ports.erase(n);
					break;
				}
			}
		}
	}

	return bound;
}

const char* irc::sockets::insp_ntoa(insp_inaddr n)
{
	static char buf[1024];
	inet_ntop(AF_FAMILY, &n, buf, sizeof(buf));
	return buf;
}

int irc::sockets::insp_aton(const char* a, insp_inaddr* n)
{
	return inet_pton(AF_FAMILY, a, n);
}