1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2007 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
16 #include "configreader.h"
18 #include "socketengine.h"
21 using namespace irc::sockets;
23 /* Used when comparing CIDR masks for the modulus bits left over.
24 * A lot of ircd's seem to do this:
25 * ((-1) << (8 - (mask % 8)))
26 * But imho, it sucks in comparison to a nice neat lookup table.
28 const unsigned char inverted_bits[8] = { 0x00, /* 00000000 - 0 bits - never actually used */
29 0x80, /* 10000000 - 1 bits */
30 0xC0, /* 11000000 - 2 bits */
31 0xE0, /* 11100000 - 3 bits */
32 0xF0, /* 11110000 - 4 bits */
33 0xF8, /* 11111000 - 5 bits */
34 0xFC, /* 11111100 - 6 bits */
35 0xFE /* 11111110 - 7 bits */
39 ListenSocket::ListenSocket(InspIRCd* Instance, int port, char* addr) : ServerInstance(Instance), desc("plaintext"), bind_addr(addr), bind_port(port)
41 this->SetFd(OpenTCPSocket(addr));
42 if (this->GetFd() > -1)
44 if (!Instance->BindSocket(this->fd,port,addr))
47 if ((!*addr) || (strchr(addr,':')))
48 this->family = AF_INET6;
51 this->family = AF_INET;
52 Instance->SE->AddFd(this);
56 ListenSocket::~ListenSocket()
58 if (this->GetFd() > -1)
60 ServerInstance->SE->DelFd(this);
61 ServerInstance->Log(DEBUG,"Shut down listener on fd %d", this->fd);
62 if (shutdown(this->fd, 2) || close(this->fd))
63 ServerInstance->Log(DEBUG,"Failed to cancel listener: %s", strerror(errno));
68 void ListenSocket::HandleEvent(EventType et, int errornum)
70 sockaddr* sock_us = new sockaddr[2]; // our port number
71 sockaddr* client = new sockaddr[2];
72 socklen_t uslen, length; // length of our port number
73 int incomingSockfd, in_port;
76 if (this->family == AF_INET6)
78 uslen = sizeof(sockaddr_in6);
79 length = sizeof(sockaddr_in6);
84 uslen = sizeof(sockaddr_in);
85 length = sizeof(sockaddr_in);
88 void* m_acceptEvent = NULL;
89 GetExt("windows_acceptevent", m_acceptEvent);
90 incomingSockfd = _accept (this->GetFd(), (sockaddr*)client, &length);
92 if ((incomingSockfd > -1) && (!_getsockname(incomingSockfd, sock_us, &uslen)))
96 if (this->family == AF_INET6)
98 inet_ntop(AF_INET6, &((const sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf));
99 in_port = ntohs(((sockaddr_in6*)sock_us)->sin6_port);
104 inet_ntop(AF_INET, &((const sockaddr_in*)client)->sin_addr, buf, sizeof(buf));
105 in_port = ntohs(((sockaddr_in*)sock_us)->sin_port);
108 NonBlocking(incomingSockfd);
109 if (ServerInstance->Config->GetIOHook(in_port))
113 ServerInstance->Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, buf, in_port);
115 catch (CoreException& modexcept)
117 ServerInstance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
120 ServerInstance->stats->statsAccept++;
121 userrec::AddClient(ServerInstance, incomingSockfd, in_port, false, this->family, client);
125 shutdown(incomingSockfd,2);
126 close(incomingSockfd);
127 ServerInstance->stats->statsRefused++;
133 /* Match raw bytes using CIDR bit matching, used by higher level MatchCIDR() */
134 bool irc::sockets::MatchCIDRBits(unsigned char* address, unsigned char* mask, unsigned int mask_bits)
136 unsigned int divisor = mask_bits / 8; /* Number of whole bytes in the mask */
137 unsigned int modulus = mask_bits % 8; /* Remaining bits in the mask after whole bytes are dealt with */
139 /* First (this is faster) compare the odd bits with logic ops */
141 if ((address[divisor] & inverted_bits[modulus]) != (mask[divisor] & inverted_bits[modulus]))
142 /* If they dont match, return false */
145 /* Secondly (this is slower) compare the whole bytes */
146 if (memcmp(address, mask, divisor))
149 /* The address matches the mask, to mask_bits bits of mask */
153 /* Match CIDR, but dont attempt to match() against leading *!*@ sections */
154 bool irc::sockets::MatchCIDR(const char* address, const char* cidr_mask)
156 return MatchCIDR(address, cidr_mask, false);
159 /* Match CIDR strings, e.g. 127.0.0.1 to 127.0.0.0/8 or 3ffe:1:5:6::8 to 3ffe:1::0/32
160 * If you have a lot of hosts to match, youre probably better off building your mask once
161 * and then using the lower level MatchCIDRBits directly.
163 * This will also attempt to match any leading usernames or nicknames on the mask, using
164 * match(), when match_with_username is true.
166 bool irc::sockets::MatchCIDR(const char* address, const char* cidr_mask, bool match_with_username)
168 unsigned char addr_raw[16];
169 unsigned char mask_raw[16];
170 unsigned int bits = 0;
173 /* The caller is trying to match ident@<mask>/bits.
174 * Chop off the ident@ portion, use match() on it
177 if (match_with_username)
179 /* Duplicate the strings, and try to find the position
180 * of the @ symbol in each */
181 char* address_dupe = strdup(address);
182 char* cidr_dupe = strdup(cidr_mask);
184 /* Use strchr not strrchr, because its going to be nearer to the left */
185 char* username_mask_pos = strrchr(cidr_dupe, '@');
186 char* username_addr_pos = strrchr(address_dupe, '@');
188 /* Both strings have an @ symbol in them */
189 if (username_mask_pos && username_addr_pos)
191 /* Zero out the location of the @ symbol */
192 *username_mask_pos = *username_addr_pos = 0;
194 /* Try and match() the strings before the @
195 * symbols, and recursively call MatchCIDR without
196 * username matching enabled to match the host part.
198 bool result = (match(address_dupe, cidr_dupe) && MatchCIDR(username_addr_pos + 1, username_mask_pos + 1, false));
200 /* Free the stuff we created */
204 /* Return a result */
209 /* One or both didnt have an @ in,
214 mask = strdup(cidr_mask);
219 /* Make a copy of the cidr mask string,
220 * we're going to change it
222 mask = strdup(cidr_mask);
229 /* Use strrchr for this, its nearer to the right */
230 char* bits_chars = strrchr(mask,'/');
234 bits = atoi(bits_chars + 1);
239 /* No 'number of bits' field! */
244 #ifdef SUPPORT_IP6LINKS
245 in6_addr address_in6;
248 if (inet_pton(AF_INET6, address, &address_in6) > 0)
250 if (inet_pton(AF_INET6, mask, &mask_in6) > 0)
252 memcpy(&addr_raw, &address_in6.s6_addr, 16);
253 memcpy(&mask_raw, &mask_in6.s6_addr, 16);
260 /* The address was valid ipv6, but the mask
261 * that goes with it wasnt.
269 if (inet_pton(AF_INET, address, &address_in4) > 0)
271 if (inet_pton(AF_INET, mask, &mask_in4) > 0)
273 memcpy(&addr_raw, &address_in4.s_addr, 4);
274 memcpy(&mask_raw, &mask_in4.s_addr, 4);
281 /* The address was valid ipv4,
282 * but the mask that went with it wasnt.
290 /* The address was neither ipv4 or ipv6 */
295 /* Low-level-match the bits in the raw data */
297 return MatchCIDRBits(addr_raw, mask_raw, bits);
300 void irc::sockets::Blocking(int s)
303 int flags = fcntl(s, F_GETFL, 0);
304 fcntl(s, F_SETFL, flags ^ O_NONBLOCK);
306 unsigned long opt = 0;
307 ioctlsocket(s, FIONBIO, &opt);
311 void irc::sockets::NonBlocking(int s)
314 int flags = fcntl(s, F_GETFL, 0);
315 fcntl(s, F_SETFL, flags | O_NONBLOCK);
317 unsigned long opt = 1;
318 ioctlsocket(s, FIONBIO, &opt);
322 /** This will bind a socket to a port. It works for UDP/TCP.
323 * It can only bind to IP addresses, if you wish to bind to hostnames
324 * you should first resolve them using class 'Resolver'.
326 bool InspIRCd::BindSocket(int sockfd, int port, char* addr, bool dolisten)
328 /* We allocate 2 of these, because sockaddr_in6 is larger than sockaddr (ugh, hax) */
329 sockaddr* server = new sockaddr[2];
330 memset(server,0,sizeof(sockaddr)*2);
340 /* There is an address here. Is it ipv6? */
341 if (strchr(addr,':'))
345 if (inet_pton(AF_INET6, addr, &addy) < 1)
351 ((sockaddr_in6*)server)->sin6_family = AF_INET6;
352 memcpy(&(((sockaddr_in6*)server)->sin6_addr), &addy, sizeof(in6_addr));
353 ((sockaddr_in6*)server)->sin6_port = htons(port);
354 size = sizeof(sockaddr_in6);
360 if (inet_pton(AF_INET, addr, &addy) < 1)
366 ((sockaddr_in*)server)->sin_family = AF_INET;
367 ((sockaddr_in*)server)->sin_addr = addy;
368 ((sockaddr_in*)server)->sin_port = htons(port);
369 size = sizeof(sockaddr_in);
376 /* Port -1: Means UDP IPV4 port binding - Special case
377 * used by DNS engine.
379 ((sockaddr_in*)server)->sin_family = AF_INET;
380 ((sockaddr_in*)server)->sin_addr.s_addr = htonl(INADDR_ANY);
381 ((sockaddr_in*)server)->sin_port = 0;
382 size = sizeof(sockaddr_in);
386 /* Theres no address here, default to ipv6 bind to all */
387 ((sockaddr_in6*)server)->sin6_family = AF_INET6;
388 memset(&(((sockaddr_in6*)server)->sin6_addr), 0, sizeof(in6_addr));
389 ((sockaddr_in6*)server)->sin6_port = htons(port);
390 size = sizeof(sockaddr_in6);
394 /* If we aren't built with ipv6, the choice becomes simple */
395 ((sockaddr_in*)server)->sin_family = AF_INET;
398 /* There is an address here. */
400 if (inet_pton(AF_INET, addr, &addy) < 1)
405 ((sockaddr_in*)server)->sin_addr = addy;
409 /* Bind ipv4 to all */
410 ((sockaddr_in*)server)->sin_addr.s_addr = htonl(INADDR_ANY);
412 /* Bind ipv4 port number */
413 ((sockaddr_in*)server)->sin_port = htons(port);
414 size = sizeof(sockaddr_in);
416 ret = bind(sockfd, server, size);
427 if (listen(sockfd, Config->MaxConn) == -1)
429 this->Log(DEFAULT,"ERROR in listen(): %s",strerror(errno));
434 this->Log(DEBUG,"New socket binding for %d with listen: %s:%d", sockfd, addr, port);
441 this->Log(DEBUG,"New socket binding for %d without listen: %s:%d", sockfd, addr, port);
448 int irc::sockets::OpenTCPSocket(char* addr, int socktype)
452 struct linger linger = { 0 };
454 if (strchr(addr,':') || (!*addr))
455 sockfd = socket (PF_INET6, socktype, 0);
457 sockfd = socket (PF_INET, socktype, 0);
460 if ((sockfd = socket (PF_INET, socktype, 0)) < 0)
467 setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on));
468 /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
471 setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (char*)&linger,sizeof(linger));
476 int InspIRCd::BindPorts(bool bail, int &ports_found, FailedPortList &failed_ports)
478 char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
480 bool started_with_nothing = (Config->ports.size() == 0);
481 std::vector<std::pair<std::string, int> > old_ports;
483 /* XXX: Make a copy of the old ip/port pairs here */
484 for (std::vector<ListenSocket*>::iterator o = Config->ports.begin(); o != Config->ports.end(); ++o)
485 old_ports.push_back(make_pair((*o)->GetIP(), (*o)->GetPort()));
487 for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
489 Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
490 Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
491 Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
493 if ((!*Type) || (!strcmp(Type,"clients")))
495 irc::portparser portrange(configToken, false);
497 while ((portno = portrange.GetToken()))
503 for (std::vector<ListenSocket*>::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n)
505 if (((*n)->GetIP() == Addr) && ((*n)->GetPort() == portno))
508 /* XXX: Here, erase from our copy of the list */
509 for (std::vector<std::pair<std::string, int> >::iterator k = old_ports.begin(); k != old_ports.end(); ++k)
511 if ((k->first == Addr) && (k->second == portno))
521 ListenSocket* ll = new ListenSocket(this, portno, Addr);
522 if (ll->GetFd() > -1)
525 Config->ports.push_back(ll);
529 failed_ports.push_back(std::make_pair(Addr, portno));
537 /* XXX: Here, anything left in our copy list, close as removed */
538 if (!started_with_nothing)
540 for (size_t k = 0; k < old_ports.size(); ++k)
542 for (std::vector<ListenSocket*>::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n)
544 if (((*n)->GetIP() == old_ports[k].first) && ((*n)->GetPort() == old_ports[k].second))
546 this->Log(DEFAULT,"Port binding %s:%d was removed from the config file, closing.", old_ports[k].first.c_str(), old_ports[k].second);
548 Config->ports.erase(n);
558 const char* irc::sockets::insp_ntoa(insp_inaddr n)
560 static char buf[1024];
561 inet_ntop(AF_FAMILY, &n, buf, sizeof(buf));
565 int irc::sockets::insp_aton(const char* a, insp_inaddr* n)
567 return inet_pton(AF_FAMILY, a, n);