1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
10 * Written by Craig Edwards, Craig McLure, and others.
11 * This program is free but copyrighted software; see
12 * the file COPYING for details.
14 * ---------------------------------------------------
18 #include "configreader.h"
21 #include "inspstring.h"
22 #include "helperfuncs.h"
23 #include "socketengine.h"
27 extern InspIRCd* ServerInstance;
28 extern ServerConfig* Config;
31 /* Used when comparing CIDR masks for the modulus bits left over.
32 * A lot of ircd's seem to do this:
33 * ((-1) << (8 - (mask % 8)))
34 * But imho, it sucks in comparison to a nice neat lookup table.
36 const char inverted_bits[8] = { 0x00, /* 00000000 - 0 bits - never actually used */
37 0x80, /* 10000000 - 1 bits */
38 0xC0, /* 11000000 - 2 bits */
39 0xE0, /* 11100000 - 3 bits */
40 0xF0, /* 11110000 - 4 bits */
41 0xF8, /* 11111000 - 5 bits */
42 0xFC, /* 11111100 - 6 bits */
43 0xFE /* 11111110 - 7 bits */
46 /* Match raw bytes using CIDR bit matching, used by higher level MatchCIDR() */
47 bool MatchCIDRBits(unsigned char* address, unsigned char* mask, unsigned int mask_bits)
49 unsigned int modulus = mask_bits % 8; /* Number of whole bytes in the mask */
50 unsigned int divisor = mask_bits / 8; /* Remaining bits in the mask after whole bytes are dealt with */
52 /* First compare the whole bytes, if they dont match, return false */
53 if (memcmp(address, mask, divisor))
56 /* Now if there are any remainder bits, we compare them with logic AND */
58 if ((address[divisor] & inverted_bits[modulus]) != (mask[divisor] & inverted_bits[modulus]))
59 /* If they dont match, return false */
62 /* The address matches the mask, to mask_bits bits of mask */
66 /* Match CIDR, but dont attempt to match() against leading *!*@ sections */
67 bool MatchCIDR(const char* address, const char* cidr_mask)
69 return MatchCIDR(address, cidr_mask, false);
72 /* 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
73 * If you have a lot of hosts to match, youre probably better off building your mask once
74 * and then using the lower level MatchCIDRBits directly.
76 * This will also attempt to match any leading usernames or nicknames on the mask, using
77 * match(), when match_with_username is true.
79 bool MatchCIDR(const char* address, const char* cidr_mask, bool match_with_username)
81 unsigned char addr_raw[16];
82 unsigned char mask_raw[16];
83 unsigned int bits = 0;
86 /* The caller is trying to match ident@<mask>/bits.
87 * Chop off the ident@ portion, use match() on it
90 if (match_with_username)
92 /* Duplicate the strings, and try to find the position
93 * of the @ symbol in each */
94 char* address_dupe = strdup(address);
95 char* cidr_dupe = strdup(cidr_mask);
97 /* Use strchr not strrchr, because its going to be nearer to the left */
98 char* username_mask_pos = strrchr(cidr_dupe, '@');
99 char* username_addr_pos = strrchr(address_dupe, '@');
101 /* Both strings have an @ symbol in them */
102 if (username_mask_pos && username_addr_pos)
104 /* Zero out the location of the @ symbol */
105 *username_mask_pos = *username_addr_pos = 0;
107 /* Try and match() the strings before the @
108 * symbols, and recursively call MatchCIDR without
109 * username matching enabled to match the host part.
111 bool result = (match(address_dupe, cidr_dupe) && MatchCIDR(username_addr_pos + 1, username_mask_pos + 1, false));
113 /* Free the stuff we created */
117 /* Return a result */
122 /* One or both didnt have an @ in,
127 mask = strdup(cidr_mask);
132 /* Make a copy of the cidr mask string,
133 * we're going to change it
135 mask = strdup(cidr_mask);
142 /* Use strrchr for this, its nearer to the right */
143 char* bits_chars = strrchr(mask,'/');
147 bits = atoi(bits_chars + 1);
152 /* No 'number of bits' field! */
156 #ifdef SUPPORT_IP6LINKS
157 in6_addr address_in6;
160 if (inet_pton(AF_INET6, address, &address_in6) > 0)
162 if (inet_pton(AF_INET6, mask, &mask_in6) > 0)
164 memcpy(&addr_raw, &address_in6.s6_addr, 16);
165 memcpy(&mask_raw, &mask_in6.s6_addr, 16);
172 /* The address was valid ipv6, but the mask
173 * that goes with it wasnt.
181 if (inet_pton(AF_INET, address, &address_in4) > 0)
183 if (inet_pton(AF_INET, mask, &mask_in4) > 0)
185 memcpy(&addr_raw, &address_in4.s_addr, 4);
186 memcpy(&mask_raw, &mask_in4.s_addr, 4);
193 /* The address was valid ipv4,
194 * but the mask that went with it wasnt.
202 /* The address was neither ipv4 or ipv6 */
207 /* Low-level-match the bits in the raw data */
209 return MatchCIDRBits(addr_raw, mask_raw, bits);
212 /** This will bind a socket to a port. It works for UDP/TCP.
213 * It can only bind to IP addresses, if you wish to bind to hostnames
214 * you should first resolve them using class 'Resolver'.
216 bool BindSocket(int sockfd, insp_sockaddr client, insp_sockaddr server, int port, char* addr)
218 memset(&server,0,sizeof(server));
224 if ((*addr) && (insp_aton(addr,&addy) < 1))
226 log(DEBUG,"Invalid IP '%s' given to BindSocket()", addr);
231 server.sin6_family = AF_FAMILY;
233 server.sin_family = AF_FAMILY;
238 memcpy(&addy, &server.sin6_addr, sizeof(in6_addr));
240 server.sin_addr.s_addr = htonl(INADDR_ANY);
246 memcpy(&addy, &server.sin6_addr, sizeof(in6_addr));
248 server.sin_addr = addy;
252 server.sin6_port = htons(port);
254 server.sin_port = htons(port);
256 if (bind(sockfd,(struct sockaddr*)&server,sizeof(server)) < 0)
262 log(DEBUG,"Bound port %s:%d",*addr ? addr : "*",port);
263 if (listen(sockfd, Config->MaxConn) == -1)
265 log(DEFAULT,"ERROR in listen(): %s",strerror(errno));
282 struct linger linger = { 0 };
284 if ((sockfd = socket (AF_FAMILY, SOCK_STREAM, 0)) < 0)
286 log(DEFAULT,"Error creating TCP socket: %s",strerror(errno));
291 setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
292 /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
295 setsockopt(sockfd, SOL_SOCKET, SO_LINGER, &linger,sizeof(linger));
300 bool HasPort(int port, char* addr)
302 for (unsigned long count = 0; count < ServerInstance->stats->BoundPortCount; count++)
304 if ((port == Config->ports[count]) && (!strcasecmp(Config->addrs[count],addr)))
312 int BindPorts(bool bail)
314 char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
315 insp_sockaddr client, server;
316 int clientportcount = 0;
317 int BoundPortCount = 0;
321 int InitialPortCount = ServerInstance->stats->BoundPortCount;
322 log(DEBUG,"Initial port count: %d",InitialPortCount);
324 for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
326 Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
327 Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
328 Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
330 if (((!*Type) || (!strcmp(Type,"clients"))) && (!HasPort(atoi(configToken),Addr)))
332 // modules handle server bind types now
333 Config->ports[clientportcount+InitialPortCount] = atoi(configToken);
337 strlcpy(Config->addrs[clientportcount+InitialPortCount],Addr,256);
339 log(DEBUG,"NEW binding %s:%s [%s] from config",Addr,configToken, Type);
342 int PortCount = clientportcount;
345 for (int count = InitialPortCount; count < InitialPortCount + PortCount; count++)
347 if ((Config->openSockfd[count] = OpenTCPSocket()) == ERROR)
349 log(DEBUG,"Bad fd %d binding port [%s:%d]",Config->openSockfd[count],Config->addrs[count],Config->ports[count]);
352 if (!BindSocket(Config->openSockfd[count],client,server,Config->ports[count],Config->addrs[count]))
354 log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
358 /* Associate the new open port with a slot in the socket engine */
359 if (Config->openSockfd[count] > -1)
361 ServerInstance->SE->AddFd(Config->openSockfd[count],true,X_LISTEN);
366 return InitialPortCount + BoundPortCount;
370 log(DEBUG,"There is nothing new to bind!");
372 return InitialPortCount;
375 for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
377 Config->ConfValue(Config->config_data, "bind", "port", count, configToken, MAXBUF);
378 Config->ConfValue(Config->config_data, "bind", "address", count, Addr, MAXBUF);
379 Config->ConfValue(Config->config_data, "bind", "type", count, Type, MAXBUF);
381 if ((!*Type) || (!strcmp(Type,"clients")))
383 // modules handle server bind types now
384 Config->ports[clientportcount] = atoi(configToken);
386 // If the client put bind "*", this is an unrealism.
387 // We don't actually support this as documented, but
388 // i got fed up of people trying it, so now it converts
389 // it to an empty string meaning the same 'bind to all'.
393 strlcpy(Config->addrs[clientportcount],Addr,256);
395 log(DEBUG,"Binding %s:%s [%s] from config",Addr,configToken, Type);
399 int PortCount = clientportcount;
401 for (int count = 0; count < PortCount; count++)
403 if ((Config->openSockfd[BoundPortCount] = OpenTCPSocket()) == ERROR)
405 log(DEBUG,"Bad fd %d binding port [%s:%d]",Config->openSockfd[BoundPortCount],Config->addrs[count],Config->ports[count]);
409 if (!BindSocket(Config->openSockfd[BoundPortCount],client,server,Config->ports[count],Config->addrs[count]))
411 log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
415 /* well we at least bound to one socket so we'll continue */
420 /* if we didn't bind to anything then abort */
423 log(DEFAULT,"No ports bound, bailing!");
424 printf("\nERROR: Could not bind any of %d ports! Please check your configuration.\n\n", PortCount);
428 return BoundPortCount;
431 const char* insp_ntoa(insp_inaddr n)
433 static char buf[1024];
434 inet_ntop(AF_FAMILY, &n, buf, sizeof(buf));
438 int insp_aton(const char* a, insp_inaddr* n)
440 return inet_pton(AF_FAMILY, a, n);