1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2008 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 * ---------------------------------------------------
14 /* $Core: libIRCDsocket */
18 #include "socketengine.h"
21 using namespace irc::sockets;
23 /* Private static member data must be initialized in this manner */
24 unsigned int ListenSocket::socketcount = 0;
25 sockaddr* ListenSocket::sock_us = NULL;
26 sockaddr* ListenSocket::client = NULL;
27 sockaddr* ListenSocket::raddr = NULL;
29 /* Used when comparing CIDR masks for the modulus bits left over.
30 * A lot of ircd's seem to do this:
31 * ((-1) << (8 - (mask % 8)))
32 * But imho, it sucks in comparison to a nice neat lookup table.
34 const unsigned char inverted_bits[8] = { 0x00, /* 00000000 - 0 bits - never actually used */
35 0x80, /* 10000000 - 1 bits */
36 0xC0, /* 11000000 - 2 bits */
37 0xE0, /* 11100000 - 3 bits */
38 0xF0, /* 11110000 - 4 bits */
39 0xF8, /* 11111000 - 5 bits */
40 0xFC, /* 11111100 - 6 bits */
41 0xFE /* 11111110 - 7 bits */
45 ListenSocket::ListenSocket(InspIRCd* Instance, int port, char* addr) : ServerInstance(Instance), desc("plaintext"), bind_addr(addr), bind_port(port)
47 this->SetFd(OpenTCPSocket(addr));
48 if (this->GetFd() > -1)
50 if (!Instance->BindSocket(this->fd,port,addr))
53 if ((!*addr) || (strchr(addr,':')))
54 this->family = AF_INET6;
57 this->family = AF_INET;
58 Instance->SE->AddFd(this);
60 /* Saves needless allocations */
63 /* All instances of ListenSocket share these, so reference count it */
64 ServerInstance->Logs->Log("SOCKET", DEBUG,"Allocate sockaddr structures");
65 sock_us = new sockaddr[2];
66 client = new sockaddr[2];
67 raddr = new sockaddr[2];
72 ListenSocket::~ListenSocket()
74 if (this->GetFd() > -1)
76 ServerInstance->SE->DelFd(this);
77 ServerInstance->Logs->Log("SOCKET", DEBUG,"Shut down listener on fd %d", this->fd);
78 if (ServerInstance->SE->Shutdown(this, 2) || ServerInstance->SE->Close(this))
79 ServerInstance->Logs->Log("SOCKET", DEBUG,"Failed to cancel listener: %s", strerror(errno));
91 void ListenSocket::HandleEvent(EventType e, int err)
96 ServerInstance->Logs->Log("SOCKET",DEFAULT,"ListenSocket::HandleEvent() received a socket engine error event! well shit! '%s'", strerror(err));
99 ServerInstance->Logs->Log("SOCKET",DEBUG,"*** BUG *** ListenSocket::HandleEvent() got a WRITE event!!!");
103 ServerInstance->Logs->Log("SOCKET",DEBUG,"HandleEvent for Listensoket");
104 socklen_t uslen, length; // length of our port number
105 int incomingSockfd, in_port;
108 if (this->family == AF_INET6)
110 uslen = sizeof(sockaddr_in6);
111 length = sizeof(sockaddr_in6);
116 uslen = sizeof(sockaddr_in);
117 length = sizeof(sockaddr_in);
120 incomingSockfd = ServerInstance->SE->Accept(this, (sockaddr*)client, &length);
122 if ((incomingSockfd > -1) && (!ServerInstance->SE->GetSockName(this, sock_us, &uslen)))
127 *target = *buf = '\0';
130 if (this->family == AF_INET6)
132 in_port = ntohs(((sockaddr_in6*)sock_us)->sin6_port);
133 inet_ntop(AF_INET6, &((const sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf));
134 socklen_t raddrsz = sizeof(sockaddr_in6);
135 if (getpeername(incomingSockfd, (sockaddr*) raddr, &raddrsz) == 0)
136 inet_ntop(AF_INET6, &((const sockaddr_in6*)raddr)->sin6_addr, target, sizeof(target));
138 ServerInstance->Logs->Log("SOCKET", DEBUG, "Can't get peername: %s", strerror(errno));
143 inet_ntop(AF_INET, &((const sockaddr_in*)client)->sin_addr, buf, sizeof(buf));
144 in_port = ntohs(((sockaddr_in*)sock_us)->sin_port);
145 socklen_t raddrsz = sizeof(sockaddr_in);
146 if (getpeername(incomingSockfd, (sockaddr*) raddr, &raddrsz) == 0)
147 inet_ntop(AF_INET, &((const sockaddr_in*)raddr)->sin_addr, target, sizeof(target));
149 ServerInstance->Logs->Log("SOCKET", DEBUG, "Can't get peername: %s", strerror(errno));
152 ServerInstance->SE->NonBlocking(incomingSockfd);
153 ServerInstance->stats->statsAccept++;
154 ServerInstance->Users->AddUser(ServerInstance, incomingSockfd, in_port, false, this->family, client, target);
158 ServerInstance->SE->Shutdown(incomingSockfd, 2);
159 ServerInstance->SE->Close(incomingSockfd);
160 ServerInstance->stats->statsRefused++;
167 /* Match raw bytes using CIDR bit matching, used by higher level MatchCIDR() */
168 bool irc::sockets::MatchCIDRBits(unsigned char* address, unsigned char* mask, unsigned int mask_bits)
170 unsigned int divisor = mask_bits / 8; /* Number of whole bytes in the mask */
171 unsigned int modulus = mask_bits % 8; /* Remaining bits in the mask after whole bytes are dealt with */
173 /* First (this is faster) compare the odd bits with logic ops */
175 if ((address[divisor] & inverted_bits[modulus]) != (mask[divisor] & inverted_bits[modulus]))
176 /* If they dont match, return false */
179 /* Secondly (this is slower) compare the whole bytes */
180 if (memcmp(address, mask, divisor))
183 /* The address matches the mask, to mask_bits bits of mask */
187 /* Match CIDR, but dont attempt to match() against leading *!*@ sections */
188 bool irc::sockets::MatchCIDR(const char* address, const char* cidr_mask)
190 return MatchCIDR(address, cidr_mask, false);
193 /* 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
194 * If you have a lot of hosts to match, youre probably better off building your mask once
195 * and then using the lower level MatchCIDRBits directly.
197 * This will also attempt to match any leading usernames or nicknames on the mask, using
198 * match(), when match_with_username is true.
200 bool irc::sockets::MatchCIDR(const char* address, const char* cidr_mask, bool match_with_username)
202 unsigned char addr_raw[16];
203 unsigned char mask_raw[16];
204 unsigned int bits = 0;
207 /* The caller is trying to match ident@<mask>/bits.
208 * Chop off the ident@ portion, use match() on it
211 if (match_with_username)
213 /* Duplicate the strings, and try to find the position
214 * of the @ symbol in each */
215 char* address_dupe = strdup(address);
216 char* cidr_dupe = strdup(cidr_mask);
218 /* Use strchr not strrchr, because its going to be nearer to the left */
219 char* username_mask_pos = strrchr(cidr_dupe, '@');
220 char* username_addr_pos = strrchr(address_dupe, '@');
222 /* Both strings have an @ symbol in them */
223 if (username_mask_pos && username_addr_pos)
225 /* Zero out the location of the @ symbol */
226 *username_mask_pos = *username_addr_pos = 0;
228 /* Try and match() the strings before the @
229 * symbols, and recursively call MatchCIDR without
230 * username matching enabled to match the host part.
232 bool result = (match(address_dupe, cidr_dupe) && MatchCIDR(username_addr_pos + 1, username_mask_pos + 1, false));
234 /* Free the stuff we created */
238 /* Return a result */
243 /* One or both didnt have an @ in,
248 mask = strdup(cidr_mask);
253 /* Make a copy of the cidr mask string,
254 * we're going to change it
256 mask = strdup(cidr_mask);
263 /* Use strrchr for this, its nearer to the right */
264 char* bits_chars = strrchr(mask,'/');
268 bits = atoi(bits_chars + 1);
273 /* No 'number of bits' field! */
278 #ifdef SUPPORT_IP6LINKS
279 in6_addr address_in6;
282 if (inet_pton(AF_INET6, address, &address_in6) > 0)
284 if (inet_pton(AF_INET6, mask, &mask_in6) > 0)
286 memcpy(&addr_raw, &address_in6.s6_addr, 16);
287 memcpy(&mask_raw, &mask_in6.s6_addr, 16);
294 /* The address was valid ipv6, but the mask
295 * that goes with it wasnt.
303 if (inet_pton(AF_INET, address, &address_in4) > 0)
305 if (inet_pton(AF_INET, mask, &mask_in4) > 0)
307 memcpy(&addr_raw, &address_in4.s_addr, 4);
308 memcpy(&mask_raw, &mask_in4.s_addr, 4);
315 /* The address was valid ipv4,
316 * but the mask that went with it wasnt.
324 /* The address was neither ipv4 or ipv6 */
329 /* Low-level-match the bits in the raw data */
331 return MatchCIDRBits(addr_raw, mask_raw, bits);
334 /** This will bind a socket to a port. It works for UDP/TCP.
335 * It can only bind to IP addresses, if you wish to bind to hostnames
336 * you should first resolve them using class 'Resolver'.
338 bool InspIRCd::BindSocket(int sockfd, int port, const char* addr, bool dolisten)
340 /* We allocate 2 of these, because sockaddr_in6 is larger than sockaddr (ugh, hax) */
341 sockaddr* servaddr = new sockaddr[2];
342 memset(servaddr,0,sizeof(sockaddr)*2);
352 /* There is an address here. Is it ipv6? */
353 if (strchr(addr,':'))
357 if (inet_pton(AF_INET6, addr, &addy) < 1)
363 ((sockaddr_in6*)servaddr)->sin6_family = AF_INET6;
364 memcpy(&(((sockaddr_in6*)servaddr)->sin6_addr), &addy, sizeof(in6_addr));
365 ((sockaddr_in6*)servaddr)->sin6_port = htons(port);
366 size = sizeof(sockaddr_in6);
372 if (inet_pton(AF_INET, addr, &addy) < 1)
378 ((sockaddr_in*)servaddr)->sin_family = AF_INET;
379 ((sockaddr_in*)servaddr)->sin_addr = addy;
380 ((sockaddr_in*)servaddr)->sin_port = htons(port);
381 size = sizeof(sockaddr_in);
388 /* Port -1: Means UDP IPV4 port binding - Special case
389 * used by DNS engine.
391 ((sockaddr_in*)servaddr)->sin_family = AF_INET;
392 ((sockaddr_in*)servaddr)->sin_addr.s_addr = htonl(INADDR_ANY);
393 ((sockaddr_in*)servaddr)->sin_port = 0;
394 size = sizeof(sockaddr_in);
398 /* Theres no address here, default to ipv6 bind to all */
399 ((sockaddr_in6*)servaddr)->sin6_family = AF_INET6;
400 memset(&(((sockaddr_in6*)servaddr)->sin6_addr), 0, sizeof(in6_addr));
401 ((sockaddr_in6*)servaddr)->sin6_port = htons(port);
402 size = sizeof(sockaddr_in6);
406 /* If we aren't built with ipv6, the choice becomes simple */
407 ((sockaddr_in*)servaddr)->sin_family = AF_INET;
410 /* There is an address here. */
412 if (inet_pton(AF_INET, addr, &addy) < 1)
417 ((sockaddr_in*)servaddr)->sin_addr = addy;
421 /* Bind ipv4 to all */
422 ((sockaddr_in*)servaddr)->sin_addr.s_addr = htonl(INADDR_ANY);
424 /* Bind ipv4 port number */
425 ((sockaddr_in*)servaddr)->sin_port = htons(port);
426 size = sizeof(sockaddr_in);
428 ret = SE->Bind(sockfd, servaddr, size);
439 if (SE->Listen(sockfd, Config->MaxConn) == -1)
441 this->Logs->Log("SOCKET",DEFAULT,"ERROR in listen(): %s",strerror(errno));
446 this->Logs->Log("SOCKET",DEBUG,"New socket binding for %d with listen: %s:%d", sockfd, addr, port);
447 SE->NonBlocking(sockfd);
453 this->Logs->Log("SOCKET",DEBUG,"New socket binding for %d without listen: %s:%d", sockfd, addr, port);
460 int irc::sockets::OpenTCPSocket(char* addr, int socktype)
465 struct linger linger = { 0, 0 };
467 if (strchr(addr,':') || (!*addr))
468 sockfd = socket (PF_INET6, socktype, 0);
470 sockfd = socket (PF_INET, socktype, 0);
473 if ((sockfd = socket (PF_INET, socktype, 0)) < 0)
480 setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on));
481 /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
484 setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (char*)&linger,sizeof(linger));
489 int InspIRCd::BindPorts(bool, int &ports_found, FailedPortList &failed_ports)
491 char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
493 bool started_with_nothing = (Config->ports.size() == 0);
494 std::vector<std::pair<std::string, int> > old_ports;
496 /* XXX: Make a copy of the old ip/port pairs here */
497 for (std::vector<ListenSocket*>::iterator o = Config->ports.begin(); o != Config->ports.end(); ++o)
498 old_ports.push_back(make_pair((*o)->GetIP(), (*o)->GetPort()));
500 for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
502 Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
503 Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
504 Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
506 if (strncmp(Addr, "::ffff:", 7) == 0)
507 this->Logs->Log("SOCKET",DEFAULT, "Using 4in6 (::ffff:) isn't recommended. You should bind IPv4 addresses directly instead.");
509 if ((!*Type) || (!strcmp(Type,"clients")))
511 irc::portparser portrange(configToken, false);
513 while (0 != (portno = portrange.GetToken()))
519 for (std::vector<ListenSocket*>::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n)
521 if (((*n)->GetIP() == Addr) && ((*n)->GetPort() == portno))
524 /* XXX: Here, erase from our copy of the list */
525 for (std::vector<std::pair<std::string, int> >::iterator k = old_ports.begin(); k != old_ports.end(); ++k)
527 if ((k->first == Addr) && (k->second == portno))
537 ListenSocket* ll = new ListenSocket(this, portno, Addr);
538 if (ll->GetFd() > -1)
541 Config->ports.push_back(ll);
545 failed_ports.push_back(std::make_pair(Addr, portno));
553 /* XXX: Here, anything left in our copy list, close as removed */
554 if (!started_with_nothing)
556 for (size_t k = 0; k < old_ports.size(); ++k)
558 for (std::vector<ListenSocket*>::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n)
560 if (((*n)->GetIP() == old_ports[k].first) && ((*n)->GetPort() == old_ports[k].second))
562 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);
564 Config->ports.erase(n);
574 const char* irc::sockets::insp_ntoa(insp_inaddr n)
576 static char buf[1024];
577 inet_ntop(AF_FAMILY, &n, buf, sizeof(buf));
581 int irc::sockets::insp_aton(const char* a, insp_inaddr* n)
583 return inet_pton(AF_FAMILY, a, n);