+#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 unsigned 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
+#endif
+ this->family = AF_INET;
+ 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 (ServerInstance->SE->Shutdown(this, 2) || ServerInstance->SE->Close(this))
+ ServerInstance->Log(DEBUG,"Failed to cancel listener: %s", strerror(errno));
+ this->fd = -1;
+ }
+}
+
+void ListenSocket::HandleEvent(EventType, int)
+{
+ 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
+#endif
+ {
+ uslen = sizeof(sockaddr_in);
+ length = sizeof(sockaddr_in);
+ }
+
+ incomingSockfd = ServerInstance->SE->Accept(this, (sockaddr*)client, &length);
+
+ if ((incomingSockfd > -1) && (!ServerInstance->SE->GetSockName(this, 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
+#endif
+ {
+ inet_ntop(AF_INET, &((const sockaddr_in*)client)->sin_addr, buf, sizeof(buf));
+ in_port = ntohs(((sockaddr_in*)sock_us)->sin_port);
+ }
+
+ ServerInstance->SE->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++;
+ User::AddClient(ServerInstance, incomingSockfd, in_port, false, this->family, client);
+ }
+ else
+ {
+ ServerInstance->SE->Shutdown(incomingSockfd, 2);
+ ServerInstance->SE->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 divisor = mask_bits / 8; /* Number of whole bytes in the mask */
+ unsigned int modulus = mask_bits % 8; /* Remaining bits in the mask after whole bytes are dealt with */