* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
- * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
- * E-mail:
- * <brain@chatspike.net>
- * <Craig@chatspike.net>
- *
- * Written by Craig Edwards, Craig McLure, and others.
+ * InspIRCd: (C) 2002-2007 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
* This program is free but copyrighted software; see
* the file COPYING for details.
*
#include "configreader.h"
#include "socket.h"
#include "inspircd.h"
-#include "inspstring.h"
-#include "helperfuncs.h"
#include "socketengine.h"
-#include "message.h"
+#include "wildcard.h"
+
+using namespace irc::sockets;
+
+/* 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 */
+};
+
+
+ListenSocket::ListenSocket(InspIRCd* Instance, int port, char* addr) : ServerInstance(Instance), desc("plaintext"), bind_addr(addr), bind_port(port)
+{
+ this->SetFd(OpenTCPSocket(addr));
+ if (this->GetFd() > -1)
+ {
+ if (!Instance->BindSocket(this->fd,port,addr))
+ this->fd = -1;
+#ifdef IPV6
+ if ((!*addr) || (strchr(addr,':')))
+ this->family = AF_INET6;
+ else
+ this->family = AF_INET;
+#else
+ this->family = AF_INET;
+#endif
+ Instance->SE->AddFd(this);
+ }
+}
+
+ListenSocket::~ListenSocket()
+{
+ if (this->GetFd() > -1)
+ {
+ ServerInstance->SE->DelFd(this);
+ ServerInstance->Log(DEBUG,"Shut down listener on fd %d", this->fd);
+ if (shutdown(this->fd, 2) || close(this->fd))
+ ServerInstance->Log(DEBUG,"Failed to cancel listener: %s", strerror(errno));
+ this->fd = -1;
+ }
+}
+
+void ListenSocket::HandleEvent(EventType et, int errornum)
+{
+ sockaddr* sock_us = new sockaddr[2]; // our port number
+ sockaddr* client = new sockaddr[2];
+ socklen_t uslen, length; // length of our port number
+ int incomingSockfd, in_port;
+
+#ifdef IPV6
+ if (this->family == AF_INET6)
+ {
+ uslen = sizeof(sockaddr_in6);
+ length = sizeof(sockaddr_in6);
+ }
+ else
+ {
+ uslen = sizeof(sockaddr_in);
+ length = sizeof(sockaddr_in);
+ }
+#else
+ uslen = sizeof(sockaddr_in);
+ length = sizeof(sockaddr_in);
+#endif
+ incomingSockfd = accept (this->GetFd(), (sockaddr*)client, &length);
+
+ if ((incomingSockfd > -1) && (!getsockname(incomingSockfd, sock_us, &uslen)))
+ {
+ char buf[MAXBUF];
+#ifdef IPV6
+ if (this->family == AF_INET6)
+ {
+ inet_ntop(AF_INET6, &((const sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf));
+ in_port = ntohs(((sockaddr_in6*)sock_us)->sin6_port);
+ }
+ else
+ {
+ inet_ntop(AF_INET, &((const sockaddr_in*)client)->sin_addr, buf, sizeof(buf));
+ in_port = ntohs(((sockaddr_in*)sock_us)->sin_port);
+ }
+#else
+ inet_ntop(AF_INET, &((const sockaddr_in*)client)->sin_addr, buf, sizeof(buf));
+ in_port = ntohs(((sockaddr_in*)sock_us)->sin_port);
+#endif
+ NonBlocking(incomingSockfd);
+ if (ServerInstance->Config->GetIOHook(in_port))
+ {
+ try
+ {
+ ServerInstance->Config->GetIOHook(in_port)->OnRawSocketAccept(incomingSockfd, buf, in_port);
+ }
+ catch (CoreException& modexcept)
+ {
+ ServerInstance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
+ }
+ }
+ ServerInstance->stats->statsAccept++;
+ userrec::AddClient(ServerInstance, incomingSockfd, in_port, false, this->family, client);
+ }
+ else
+ {
+ shutdown(incomingSockfd,2);
+ close(incomingSockfd);
+ ServerInstance->stats->statsRefused++;
+ }
+ delete[] client;
+ delete[] sock_us;
+}
+
+/* Match raw bytes using CIDR bit matching, used by higher level MatchCIDR() */
+bool irc::sockets::MatchCIDRBits(unsigned char* address, unsigned char* mask, unsigned int mask_bits)
+{
+ 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;
+}
+
+/* Match CIDR, but dont attempt to match() against leading *!*@ sections */
+bool irc::sockets::MatchCIDR(const char* address, const char* cidr_mask)
+{
+ return MatchCIDR(address, cidr_mask, false);
+}
+
+/* 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 irc::sockets::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! */
+ free(mask);
+ 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;
+ }
-extern InspIRCd* ServerInstance;
-extern ServerConfig* Config;
-extern time_t TIME;
+ /* Low-level-match the bits in the raw data */
+ free(mask);
+ return MatchCIDRBits(addr_raw, mask_raw, bits);
+}
+
+void irc::sockets::Blocking(int s)
+{
+ int flags = fcntl(s, F_GETFL, 0);
+ fcntl(s, F_SETFL, flags ^ O_NONBLOCK);
+}
+
+void irc::sockets::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.
- * If a hostname is given to bind to, the function will first
- * attempt to resolve the hostname, then bind to the IP the
- * hostname resolves to. This is a blocking lookup blocking for
- * a maximum of one second before it times out, using the DNS
- * server specified in the configuration file.
+ * 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)
+bool InspIRCd::BindSocket(int sockfd, int port, char* addr, bool dolisten)
{
- memset(&server,0,sizeof(server));
- insp_inaddr addy;
- bool resolved = false;
- char resolved_addr[128];
+ /* We allocate 2 of these, because sockaddr_in6 is larger than sockaddr (ugh, hax) */
+ sockaddr* server = new sockaddr[2];
+ memset(server,0,sizeof(sockaddr)*2);
+
+ int ret, size;
if (*addr == '*')
*addr = 0;
- if (*addr && !inet_aton(addr,&addy))
+#ifdef IPV6
+ if (*addr)
{
- /* If they gave a hostname, bind to the IP it resolves to */
- if (CleanAndResolve(resolved_addr, addr, true, 1))
+ /* There is an address here. Is it ipv6? */
+ if (strchr(addr,':'))
{
- inet_aton(resolved_addr,&addy);
- log(DEFAULT,"Resolved binding '%s' -> '%s'",addr,resolved_addr);
- server.sin_addr = addy;
- resolved = true;
+ /* Yes it is */
+ in6_addr addy;
+ if (inet_pton(AF_INET6, addr, &addy) < 1)
+ {
+ delete[] server;
+ return false;
+ }
+
+ ((sockaddr_in6*)server)->sin6_family = AF_INET6;
+ memcpy(&(((sockaddr_in6*)server)->sin6_addr), &addy, sizeof(in6_addr));
+ ((sockaddr_in6*)server)->sin6_port = htons(port);
+ size = sizeof(sockaddr_in6);
}
else
{
- log(DEFAULT,"WARNING: Could not resolve '%s' to an IP for binding to on port %d",addr,port);
- return false;
+ /* No, its not */
+ in_addr addy;
+ if (inet_pton(AF_INET, addr, &addy) < 1)
+ {
+ delete[] server;
+ return false;
+ }
+
+ ((sockaddr_in*)server)->sin_family = AF_INET;
+ ((sockaddr_in*)server)->sin_addr = addy;
+ ((sockaddr_in*)server)->sin_port = htons(port);
+ size = sizeof(sockaddr_in);
}
}
- server.sin_family = AF_INET;
- if (!resolved)
+ else
{
- if (!*addr)
+ if (port == -1)
{
- server.sin_addr.s_addr = htonl(INADDR_ANY);
+ /* Port -1: Means UDP IPV4 port binding - Special case
+ * used by DNS engine.
+ */
+ ((sockaddr_in*)server)->sin_family = AF_INET;
+ ((sockaddr_in*)server)->sin_addr.s_addr = htonl(INADDR_ANY);
+ ((sockaddr_in*)server)->sin_port = 0;
+ size = sizeof(sockaddr_in);
}
else
{
- server.sin_addr = addy;
+ /* Theres no address here, default to ipv6 bind to all */
+ ((sockaddr_in6*)server)->sin6_family = AF_INET6;
+ memset(&(((sockaddr_in6*)server)->sin6_addr), 0, sizeof(in6_addr));
+ ((sockaddr_in6*)server)->sin6_port = htons(port);
+ size = sizeof(sockaddr_in6);
+ }
+ }
+#else
+ /* If we aren't built with ipv6, the choice becomes simple */
+ ((sockaddr_in*)server)->sin_family = AF_INET;
+ if (*addr)
+ {
+ /* There is an address here. */
+ in_addr addy;
+ if (inet_pton(AF_INET, addr, &addy) < 1)
+ {
+ delete[] server;
+ return false;
}
+ ((sockaddr_in*)server)->sin_addr = addy;
}
- server.sin_port = htons(port);
- if (bind(sockfd,(struct sockaddr*)&server,sizeof(server)) < 0)
+ else
+ {
+ /* Bind ipv4 to all */
+ ((sockaddr_in*)server)->sin_addr.s_addr = htonl(INADDR_ANY);
+ }
+ /* Bind ipv4 port number */
+ ((sockaddr_in*)server)->sin_port = htons(port);
+ size = sizeof(sockaddr_in);
+#endif
+ ret = bind(sockfd, server, size);
+ delete[] server;
+
+ if (ret < 0)
{
return false;
}
else
{
- log(DEBUG,"Bound port %s:%d",*addr ? addr : "*",port);
- if (listen(sockfd, Config->MaxConn) == -1)
+ if (dolisten)
{
- log(DEFAULT,"ERROR in listen(): %s",strerror(errno));
- return false;
+ if (listen(sockfd, Config->MaxConn) == -1)
+ {
+ this->Log(DEFAULT,"ERROR in listen(): %s",strerror(errno));
+ return false;
+ }
+ else
+ {
+ this->Log(DEBUG,"New socket binding for %d with listen: %s:%d", sockfd, addr, port);
+ NonBlocking(sockfd);
+ return true;
+ }
}
else
{
- NonBlocking(sockfd);
+ this->Log(DEBUG,"New socket binding for %d without listen: %s:%d", sockfd, addr, port);
return true;
}
}
}
-
// Open a TCP Socket
-int OpenTCPSocket()
+int irc::sockets::OpenTCPSocket(char* addr, int socktype)
{
int sockfd;
int on = 1;
struct linger linger = { 0 };
-
- if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
+#ifdef IPV6
+ if (strchr(addr,':') || (!*addr))
+ sockfd = socket (PF_INET6, socktype, 0);
+ else
+ sockfd = socket (PF_INET, socktype, 0);
+ if (sockfd < 0)
+#else
+ if ((sockfd = socket (PF_INET, socktype, 0)) < 0)
+#endif
{
- log(DEFAULT,"Error creating TCP socket: %s",strerror(errno));
- return (ERROR);
+ return ERROR;
}
else
{
}
}
-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)
+/* XXX: Probably belongs in class InspIRCd */
+int InspIRCd::BindPorts(bool bail, int &ports_found, FailedPortList &failed_ports)
{
char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
- insp_sockaddr client, server;
- int clientportcount = 0;
- int BoundPortCount = 0;
+ int bound = 0;
- if (!bail)
+ for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
{
- int InitialPortCount = ServerInstance->stats->BoundPortCount;
- log(DEBUG,"Initial port count: %d",InitialPortCount);
+ 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);
- for (int count = 0; count < Config->ConfValueEnum(Config->config_data, "bind"); count++)
+ if ((!*Type) || (!strcmp(Type,"clients")))
{
- 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)))
+ irc::portparser portrange(configToken, false);
+ int portno = -1;
+ while ((portno = portrange.GetToken()))
{
- // 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]);
- return ERROR;
- }
- if (!BindSocket(Config->openSockfd[count],client,server,Config->ports[count],Config->addrs[count]))
+ bool skip = false;
+ for (std::vector<ListenSocket*>::iterator n = Config->ports.begin(); n != Config->ports.end(); ++n)
+ if (((*n)->GetIP() == Addr) && ((*n)->GetPort() == portno))
+ skip = true;
+ if (!skip)
{
- 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)
+ ListenSocket* ll = new ListenSocket(this, portno, Addr);
+ if (ll->GetFd() > -1)
{
- ServerInstance->SE->AddFd(Config->openSockfd[count],true,X_LISTEN);
- BoundPortCount++;
+ bound++;
+ Config->ports.push_back(ll);
}
+ else
+ {
+ failed_ports.push_back(std::make_pair(Addr, portno));
+ }
+ ports_found++;
}
}
- 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]);
- return ERROR;
- }
-
- 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 bound;
+}
- /* if we didn't bind to anything then abort */
- if (!BoundPortCount)
- {
- log(DEFAULT,"No ports bound, bailing!");
- printf("\nERROR: Could not bind any of %d ports! Please check your configuration.\n\n", PortCount);
- return ERROR;
- }
+const char* irc::sockets::insp_ntoa(insp_inaddr n)
+{
+ static char buf[1024];
+ inet_ntop(AF_FAMILY, &n, buf, sizeof(buf));
+ return buf;
+}
- return BoundPortCount;
+int irc::sockets::insp_aton(const char* a, insp_inaddr* n)
+{
+ return inet_pton(AF_FAMILY, a, n);
}
+