1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2010 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
18 #include "socketengine.h"
20 ListenSocket::ListenSocket(ConfigTag* tag, const std::string& addr, int port)
23 irc::sockets::sockaddrs bind_to;
25 // canonicalize address if it is defined
26 if (!irc::sockets::aptosa(addr, port, bind_to))
31 irc::sockets::satoap(bind_to, bind_addr, bind_port);
32 bind_desc = irc::sockets::satouser(bind_to);
34 fd = socket(bind_to.sa.sa_family, SOCK_STREAM, 0);
38 ServerInstance->SE->SetReuse(fd);
39 int rv = ServerInstance->SE->Bind(this->fd, bind_to);
41 rv = ServerInstance->SE->Listen(this->fd, ServerInstance->Config->MaxConn);
45 ServerInstance->SE->Shutdown(this, 2);
46 ServerInstance->SE->Close(this);
51 ServerInstance->SE->NonBlocking(this->fd);
52 ServerInstance->SE->AddFd(this, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
57 ListenSocket::~ListenSocket()
59 if (this->GetFd() > -1)
61 ServerInstance->SE->DelFd(this);
62 ServerInstance->Logs->Log("SOCKET", DEBUG,"Shut down listener on fd %d", this->fd);
63 if (ServerInstance->SE->Shutdown(this, 2) || ServerInstance->SE->Close(this))
64 ServerInstance->Logs->Log("SOCKET", DEBUG,"Failed to cancel listener: %s", strerror(errno));
69 /* Just seperated into another func for tidiness really.. */
70 void ListenSocket::AcceptInternal()
72 irc::sockets::sockaddrs client;
73 irc::sockets::sockaddrs server;
75 socklen_t length = sizeof(client);
76 int incomingSockfd = ServerInstance->SE->Accept(this, &client.sa, &length);
78 ServerInstance->Logs->Log("SOCKET",DEBUG,"HandleEvent for Listensoket %s nfd=%d", bind_desc.c_str(), incomingSockfd);
79 if (incomingSockfd < 0)
81 ServerInstance->stats->statsRefused++;
85 socklen_t sz = sizeof(server);
86 if (getsockname(incomingSockfd, &server.sa, &sz))
87 ServerInstance->Logs->Log("SOCKET", DEBUG, "Can't get peername: %s", strerror(errno));
91 * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
92 * its a pretty big but for the moment valid assumption:
93 * file descriptors are handed out starting at 0, and are recycled as theyre freed.
94 * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
95 * irc server at once (or the irc server otherwise initiating this many connections, files etc)
96 * which for the time being is a physical impossibility (even the largest networks dont have more
97 * than about 10,000 users on ONE server!)
99 if (incomingSockfd >= ServerInstance->SE->GetMaxFds())
101 ServerInstance->Logs->Log("SOCKET", DEBUG, "Server is full");
102 ServerInstance->SE->Shutdown(incomingSockfd, 2);
103 ServerInstance->SE->Close(incomingSockfd);
104 ServerInstance->stats->statsRefused++;
108 if (client.sa.sa_family == AF_INET6)
111 * This case is the be all and end all patch to catch and nuke 4in6
112 * instead of special-casing shit all over the place and wreaking merry
113 * havoc with crap, instead, we just recreate sockaddr and strip ::ffff: prefix
116 * This is, of course, much improved over the older way of handling this
117 * (pretend it doesn't exist + hack around it -- yes, both were done!)
119 * Big, big thanks to danieldg for his work on this.
122 static const unsigned char prefix4in6[12] = { 0,0,0,0, 0,0,0,0, 0,0,0xFF,0xFF };
123 if (!memcmp(prefix4in6, &client.in6.sin6_addr, 12))
125 // recreate as a sockaddr_in using the IPv4 IP
126 uint16_t sport = client.in6.sin6_port;
127 uint32_t addr = *reinterpret_cast<uint32_t*>(client.in6.sin6_addr.s6_addr + 12);
128 client.in4.sin_family = AF_INET;
129 client.in4.sin_port = sport;
130 client.in4.sin_addr.s_addr = addr;
132 sport = server.in6.sin6_port;
133 addr = *reinterpret_cast<uint32_t*>(server.in6.sin6_addr.s6_addr + 12);
134 server.in4.sin_family = AF_INET;
135 server.in4.sin_port = sport;
136 server.in4.sin_addr.s_addr = addr;
140 ServerInstance->SE->NonBlocking(incomingSockfd);
143 FIRST_MOD_RESULT(OnAcceptConnection, res, (incomingSockfd, this, &client, &server));
144 if (res == MOD_RES_PASSTHRU)
146 std::string type = bind_tag->getString("type", "clients");
147 if (type == "clients")
149 ServerInstance->Users->AddUser(incomingSockfd, this, &client, &server);
153 if (res == MOD_RES_ALLOW)
155 ServerInstance->stats->statsAccept++;
159 ServerInstance->stats->statsRefused++;
160 ServerInstance->Logs->Log("SOCKET",DEFAULT,"Refusing connection on %s - %s",
161 bind_desc.c_str(), res == MOD_RES_DENY ? "Connection refused by module" : "Module for this port not found");
162 ServerInstance->SE->Close(incomingSockfd);
166 void ListenSocket::HandleEvent(EventType e, int err)
171 ServerInstance->Logs->Log("SOCKET",DEFAULT,"ListenSocket::HandleEvent() received a socket engine error event! well shit! '%s'", strerror(err));
174 ServerInstance->Logs->Log("SOCKET",DEBUG,"*** BUG *** ListenSocket::HandleEvent() got a WRITE event!!!");
177 this->AcceptInternal();