* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
- * Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
+ * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
* ---------------------------------------------------
*/
-using namespace std;
-
-#include "inspircd_config.h"
-#include <sys/time.h>
-#include <sys/resource.h>
-#include <sys/types.h>
#include <string>
-#include <unistd.h>
-#include <sstream>
-#include <iostream>
-#include <fstream>
+#include "configreader.h"
#include "socket.h"
#include "inspircd.h"
-#include "inspircd_io.h"
-#include "inspircd_util.h"
#include "inspstring.h"
#include "helperfuncs.h"
+#include "socketengine.h"
+#include "wildcard.h"
+#include "message.h"
-extern FILE *log_file;
-extern int boundPortCount;
-extern int openSockfd[MAXSOCKS];
+extern InspIRCd* ServerInstance;
+extern ServerConfig* Config;
extern time_t TIME;
-extern bool unlimitcore;
-extern int MaxConn;
-InspSocket::InspSocket()
+/* Used when comparing CIDR masks for the modulus bits left over.
+ * A lot of ircd's seem to do this:
+ * ((-1) << (8 - (mask % 8)))
+ * But imho, it sucks in comparison to a nice neat lookup table.
+ */
+const char inverted_bits[8] = { 0x00, /* 00000000 - 0 bits - never actually used */
+ 0x80, /* 10000000 - 1 bits */
+ 0xC0, /* 11000000 - 2 bits */
+ 0xE0, /* 11100000 - 3 bits */
+ 0xF0, /* 11110000 - 4 bits */
+ 0xF8, /* 11111000 - 5 bits */
+ 0xFC, /* 11111100 - 6 bits */
+ 0xFE /* 11111110 - 7 bits */
+};
+
+/* Match raw bytes using CIDR bit matching, used by higher level MatchCIDR() */
+bool MatchCIDRBits(unsigned char* address, unsigned char* mask, unsigned int mask_bits)
{
- this->state = I_DISCONNECTED;
+ unsigned int modulus = mask_bits % 8; /* Number of whole bytes in the mask */
+ unsigned int divisor = mask_bits / 8; /* Remaining bits in the mask after whole bytes are dealt with */
+
+ /* First compare the whole bytes, if they dont match, return false */
+ if (memcmp(address, mask, divisor))
+ return false;
+
+ /* Now if there are any remainder bits, we compare them with logic AND */
+ if (modulus)
+ if ((address[divisor] & inverted_bits[modulus]) != (mask[divisor] & inverted_bits[modulus]))
+ /* If they dont match, return false */
+ return false;
+
+ /* The address matches the mask, to mask_bits bits of mask */
+ return true;
}
-InspSocket::InspSocket(std::string host, int port, bool listening)
+/* Match CIDR, but dont attempt to match() against leading *!*@ sections */
+bool MatchCIDR(const char* address, const char* cidr_mask)
{
+ return MatchCIDR(address, cidr_mask, false);
}
-void InspSocket::Poll()
+/* 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
+ * If you have a lot of hosts to match, youre probably better off building your mask once
+ * and then using the lower level MatchCIDRBits directly.
+ *
+ * This will also attempt to match any leading usernames or nicknames on the mask, using
+ * match(), when match_with_username is true.
+ */
+bool MatchCIDR(const char* address, const char* cidr_mask, bool match_with_username)
{
+ unsigned char addr_raw[16];
+ unsigned char mask_raw[16];
+ unsigned int bits = 0;
+ char* mask = NULL;
+
+ /* The caller is trying to match ident@<mask>/bits.
+ * Chop off the ident@ portion, use match() on it
+ * seperately.
+ */
+ if (match_with_username)
+ {
+ /* Duplicate the strings, and try to find the position
+ * of the @ symbol in each */
+ char* address_dupe = strdup(address);
+ char* cidr_dupe = strdup(cidr_mask);
+
+ /* Use strchr not strrchr, because its going to be nearer to the left */
+ char* username_mask_pos = strrchr(cidr_dupe, '@');
+ char* username_addr_pos = strrchr(address_dupe, '@');
+
+ /* Both strings have an @ symbol in them */
+ if (username_mask_pos && username_addr_pos)
+ {
+ /* Zero out the location of the @ symbol */
+ *username_mask_pos = *username_addr_pos = 0;
+
+ /* Try and match() the strings before the @
+ * symbols, and recursively call MatchCIDR without
+ * username matching enabled to match the host part.
+ */
+ bool result = (match(address_dupe, cidr_dupe) && MatchCIDR(username_addr_pos + 1, username_mask_pos + 1, false));
+
+ /* Free the stuff we created */
+ free(address_dupe);
+ free(cidr_dupe);
+
+ /* Return a result */
+ return result;
+ }
+ else
+ {
+ /* One or both didnt have an @ in,
+ * just match as CIDR
+ */
+ free(address_dupe);
+ free(cidr_dupe);
+ mask = strdup(cidr_mask);
+ }
+ }
+ else
+ {
+ /* Make a copy of the cidr mask string,
+ * we're going to change it
+ */
+ mask = strdup(cidr_mask);
+ }
+
+ in_addr address_in4;
+ in_addr mask_in4;
+
+
+ /* Use strrchr for this, its nearer to the right */
+ char* bits_chars = strrchr(mask,'/');
+
+ if (bits_chars)
+ {
+ bits = atoi(bits_chars + 1);
+ *bits_chars = 0;
+ }
+ else
+ {
+ /* No 'number of bits' field! */
+ return false;
+ }
+
+#ifdef SUPPORT_IP6LINKS
+ in6_addr address_in6;
+ in6_addr mask_in6;
+
+ if (inet_pton(AF_INET6, address, &address_in6) > 0)
+ {
+ if (inet_pton(AF_INET6, mask, &mask_in6) > 0)
+ {
+ memcpy(&addr_raw, &address_in6.s6_addr, 16);
+ memcpy(&mask_raw, &mask_in6.s6_addr, 16);
+
+ if (bits > 128)
+ bits = 128;
+ }
+ else
+ {
+ /* The address was valid ipv6, but the mask
+ * that goes with it wasnt.
+ */
+ free(mask);
+ return false;
+ }
+ }
+ else
+#endif
+ if (inet_pton(AF_INET, address, &address_in4) > 0)
+ {
+ if (inet_pton(AF_INET, mask, &mask_in4) > 0)
+ {
+ memcpy(&addr_raw, &address_in4.s_addr, 4);
+ memcpy(&mask_raw, &mask_in4.s_addr, 4);
+
+ if (bits > 32)
+ bits = 32;
+ }
+ else
+ {
+ /* The address was valid ipv4,
+ * but the mask that went with it wasnt.
+ */
+ free(mask);
+ return false;
+ }
+ }
+ else
+ {
+ /* The address was neither ipv4 or ipv6 */
+ free(mask);
+ return false;
+ }
+
+ /* Low-level-match the bits in the raw data */
+ free(mask);
+ return MatchCIDRBits(addr_raw, mask_raw, bits);
}
-int InspSocket::OnConnected() { }
-int InspSocket::OnError() { }
-int InspSocket::OnDisconnect() { }
-int InspSocket::OnIncomingConnection() { }
+inline void Blocking(int s)
+{
+ int flags = fcntl(s, F_GETFL, 0);
+ fcntl(s, F_SETFL, flags ^ O_NONBLOCK);
+}
+
+inline void NonBlocking(int s)
+{
+ int flags = fcntl(s, F_GETFL, 0);
+ fcntl(s, F_SETFL, flags | O_NONBLOCK);
+}
+
+
+/** 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 BindSocket(int sockfd, insp_sockaddr client, insp_sockaddr server, int port, char* addr)
+{
+ memset(&server,0,sizeof(server));
+ insp_inaddr addy;
+
+ if (*addr == '*')
+ *addr = 0;
+
+ if ((*addr) && (insp_aton(addr,&addy) < 1))
+ {
+ log(DEBUG,"Invalid IP '%s' given to BindSocket()", addr);
+ return false;;
+ }
+
+#ifdef IPV6
+ server.sin6_family = AF_FAMILY;
+#else
+ server.sin_family = AF_FAMILY;
+#endif
+ if (!*addr)
+ {
+#ifdef IPV6
+ memcpy(&addy, &server.sin6_addr, sizeof(in6_addr));
+#else
+ server.sin_addr.s_addr = htonl(INADDR_ANY);
+#endif
+ }
+ else
+ {
+#ifdef IPV6
+ memcpy(&addy, &server.sin6_addr, sizeof(in6_addr));
+#else
+ server.sin_addr = addy;
+#endif
+ }
+#ifdef IPV6
+ server.sin6_port = htons(port);
+#else
+ server.sin_port = htons(port);
+#endif
+ if (bind(sockfd,(struct sockaddr*)&server,sizeof(server)) < 0)
+ {
+ return false;
+ }
+ else
+ {
+ log(DEBUG,"Bound port %s:%d",*addr ? addr : "*",port);
+ if (listen(sockfd, Config->MaxConn) == -1)
+ {
+ log(DEFAULT,"ERROR in listen(): %s",strerror(errno));
+ return false;
+ }
+ else
+ {
+ NonBlocking(sockfd);
+ return true;
+ }
+ }
+}
+
+
+// Open a TCP Socket
+int OpenTCPSocket()
+{
+ int sockfd;
+ int on = 1;
+ struct linger linger = { 0 };
+
+ if ((sockfd = socket (AF_FAMILY, SOCK_STREAM, 0)) < 0)
+ {
+ log(DEFAULT,"Error creating TCP socket: %s",strerror(errno));
+ return (ERROR);
+ }
+ else
+ {
+ setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &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, &linger,sizeof(linger));
+ return (sockfd);
+ }
+}
+
+bool HasPort(int port, char* addr)
+{
+ for (unsigned long count = 0; count < ServerInstance->stats->BoundPortCount; count++)
+ {
+ if ((port == Config->ports[count]) && (!strcasecmp(Config->addrs[count],addr)))
+ {
+ return true;
+ }
+ }
+ return false;
+}
+
+int BindPorts(bool bail)
+{
+ char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
+ insp_sockaddr client, server;
+ int clientportcount = 0;
+ int BoundPortCount = 0;
+
+ if (!bail)
+ {
+ int InitialPortCount = ServerInstance->stats->BoundPortCount;
+ log(DEBUG,"Initial port count: %d",InitialPortCount);
+
+ 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 (((!*Type) || (!strcmp(Type,"clients"))) && (!HasPort(atoi(configToken),Addr)))
+ {
+ // modules handle server bind types now
+ Config->ports[clientportcount+InitialPortCount] = atoi(configToken);
+ if (*Addr == '*')
+ *Addr = 0;
+
+ strlcpy(Config->addrs[clientportcount+InitialPortCount],Addr,256);
+ clientportcount++;
+ log(DEBUG,"NEW binding %s:%s [%s] from config",Addr,configToken, Type);
+ }
+ }
+ int PortCount = clientportcount;
+ if (PortCount)
+ {
+ for (int count = InitialPortCount; count < InitialPortCount + PortCount; count++)
+ {
+ if ((Config->openSockfd[count] = OpenTCPSocket()) == ERROR)
+ {
+ log(DEBUG,"Bad fd %d binding port [%s:%d]",Config->openSockfd[count],Config->addrs[count],Config->ports[count]);
+ }
+ else
+ {
+ if (!BindSocket(Config->openSockfd[count],client,server,Config->ports[count],Config->addrs[count]))
+ {
+ log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
+ }
+ else
+ {
+ /* Associate the new open port with a slot in the socket engine */
+ if (Config->openSockfd[count] > -1)
+ {
+ if (!ServerInstance->SE->AddFd(Config->openSockfd[count],true,X_LISTEN))
+ {
+ log(DEFAULT,"ERK! Failed to add listening port to socket engine!");
+ shutdown(Config->openSockfd[count],2);
+ close(Config->openSockfd[count]);
+ }
+ else
+ BoundPortCount++;
+ }
+ }
+ }
+ }
+ return InitialPortCount + BoundPortCount;
+ }
+ else
+ {
+ log(DEBUG,"There is nothing new to bind!");
+ }
+ return InitialPortCount;
+ }
+
+ 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 ((!*Type) || (!strcmp(Type,"clients")))
+ {
+ // modules handle server bind types now
+ Config->ports[clientportcount] = atoi(configToken);
+
+ // If the client put bind "*", this is an unrealism.
+ // We don't actually support this as documented, but
+ // i got fed up of people trying it, so now it converts
+ // it to an empty string meaning the same 'bind to all'.
+ if (*Addr == '*')
+ *Addr = 0;
+
+ strlcpy(Config->addrs[clientportcount],Addr,256);
+ clientportcount++;
+ log(DEBUG,"Binding %s:%s [%s] from config",Addr,configToken, Type);
+ }
+ }
+
+ int PortCount = clientportcount;
+
+ for (int count = 0; count < PortCount; count++)
+ {
+ if ((Config->openSockfd[BoundPortCount] = OpenTCPSocket()) == ERROR)
+ {
+ log(DEBUG,"Bad fd %d binding port [%s:%d]",Config->openSockfd[BoundPortCount],Config->addrs[count],Config->ports[count]);
+ }
+ else
+ {
+ if (!BindSocket(Config->openSockfd[BoundPortCount],client,server,Config->ports[count],Config->addrs[count]))
+ {
+ log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
+ }
+ else
+ {
+ /* well we at least bound to one socket so we'll continue */
+ BoundPortCount++;
+ }
+ }
+ }
+ return BoundPortCount;
+}
+
+const char* insp_ntoa(insp_inaddr n)
+{
+ static char buf[1024];
+ inet_ntop(AF_FAMILY, &n, buf, sizeof(buf));
+ return buf;
+}
-InspSocket::~InspSocket()
+int insp_aton(const char* a, insp_inaddr* n)
{
+ return inet_pton(AF_FAMILY, a, n);
}
-/*
-int BindSocket (int sockfd, struct sockaddr_in client, struct sockaddr_in server, int port, char* addr)
-int OpenTCPSocket (void)
-*/