Refactored some platform dependent code into a new library,

lib/arch.  This should make porting easier.  Will probably
continue to refactor a little more, moving platform dependent
event handling stuff into lib/platform.

lib/arch/CArchNetworkBSD.cpp

@@ -0,0 +1,847 @@
+/*
+ * synergy -- mouse and keyboard sharing utility
+ * Copyright (C) 2002 Chris Schoeneman
+ * 
+ * This package is free software you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file COPYING that should have accompanied this file.
+ * 
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "CArchNetworkBSD.h"
+#include "CArch.h"
+#include "XArchUnix.h"
+#if HAVE_SYS_TYPES_H
+#	include <sys/types.h>
+#endif
+#if HAVE_UNISTD_H
+#	include <unistd.h>
+#endif
+#include <netinet/in.h>
+#include <netdb.h>
+#if !defined(TCP_NODELAY)
+#	include <netinet/tcp.h>
+#endif
+#include <arpa/inet.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#if HAVE_POLL
+#	include <sys/poll.h>
+#else
+#	if HAVE_SYS_SELECT_H
+#		include <sys/select.h>
+#	endif
+#	if HAVE_SYS_TIME_H
+#		include <sys/time.h>
+#	endif
+#endif
+
+static const int s_family[] = {
+	PF_INET
+};
+static const int s_type[] = {
+	SOCK_DGRAM,
+	SOCK_STREAM
+};
+
+//
+// CArchNetworkBSD
+//
+
+CArchNetworkBSD::CArchNetworkBSD()
+{
+	// create mutex to make some calls thread safe
+	m_mutex = ARCH->newMutex();
+}
+
+CArchNetworkBSD::~CArchNetworkBSD()
+{
+	ARCH->closeMutex(m_mutex);
+}
+
+CArchSocket
+CArchNetworkBSD::newSocket(EAddressFamily family, ESocketType type)
+{
+	// allocate socket object
+	CArchSocketImpl* newSocket = new CArchSocketImpl;
+
+	// create socket
+	int fd = socket(s_family[family], s_type[type], 0);
+	if (fd == -1) {
+		throwError(errno);
+	}
+
+	newSocket->m_fd        = fd;
+	newSocket->m_connected = false;
+	newSocket->m_refCount  = 1;
+	return newSocket;
+}
+
+CArchSocket
+CArchNetworkBSD::copySocket(CArchSocket s)
+{
+	assert(s != NULL);
+
+	// ref the socket and return it
+	ARCH->lockMutex(m_mutex);
+	++s->m_refCount;
+	ARCH->unlockMutex(m_mutex);
+	return s;
+}
+
+void
+CArchNetworkBSD::closeSocket(CArchSocket s)
+{
+	assert(s != NULL);
+
+	// unref the socket and note if it should be released
+	ARCH->lockMutex(m_mutex);
+	const bool doClose = (--s->m_refCount == 0);
+	ARCH->unlockMutex(m_mutex);
+
+	// close the socket if necessary
+	if (doClose) {
+		do {
+			if (close(s->m_fd) == -1) {
+				// close failed
+				int err = errno;
+				if (err == EINTR) {
+					// interrupted system call
+					ARCH->testCancelThread();
+					continue;
+				}
+
+				// restore the last ref and throw
+				ARCH->lockMutex(m_mutex);
+				++s->m_refCount;
+				ARCH->unlockMutex(m_mutex);
+				throwError(err);
+			}
+		} while (false);
+		delete s;
+	}
+}
+
+void
+CArchNetworkBSD::closeSocketForRead(CArchSocket s)
+{
+	assert(s != NULL);
+
+	if (shutdown(s->m_fd, 0) == -1) {
+		if (errno != ENOTCONN) {
+			throwError(errno);
+		}
+	}
+}
+
+void
+CArchNetworkBSD::closeSocketForWrite(CArchSocket s)
+{
+	assert(s != NULL);
+
+	if (shutdown(s->m_fd, 1) == -1) {
+		if (errno != ENOTCONN) {
+			throwError(errno);
+		}
+	}
+}
+
+void
+CArchNetworkBSD::bindSocket(CArchSocket s, CArchNetAddress addr)
+{
+	assert(s    != NULL);
+	assert(addr != NULL);
+
+	if (bind(s->m_fd, &addr->m_addr, addr->m_len) == -1) {
+		throwError(errno);
+	}
+}
+
+void
+CArchNetworkBSD::listenOnSocket(CArchSocket s)
+{
+	assert(s != NULL);
+
+	// hardcoding backlog
+	if (listen(s->m_fd, 3) == -1) {
+		throwError(errno);
+	}
+}
+
+CArchSocket
+CArchNetworkBSD::acceptSocket(CArchSocket s, CArchNetAddress* addr)
+{
+	assert(s != NULL);
+
+	// if user passed NULL in addr then use scratch space
+	CArchNetAddress dummy;
+	if (addr == NULL) {
+		addr = &dummy;
+	}
+
+	// create new socket and address
+	CArchSocketImpl* newSocket = new CArchSocketImpl;
+	*addr                      = new CArchNetAddressImpl;
+
+	// accept on socket
+	int fd;
+	do {
+		fd = accept(s->m_fd, &(*addr)->m_addr, &(*addr)->m_len);
+		if (fd == -1) {
+			int err = errno;
+			if (err == EINTR) {
+				// interrupted system call
+				ARCH->testCancelThread();
+				continue;
+			}
+			if (err == ECONNABORTED) {
+				// connection was aborted;  try again
+				ARCH->testCancelThread();
+				continue;
+			}
+			delete newSocket;
+			delete *addr;
+			*addr = NULL;
+			throwError(err);
+		}
+	} while (false);
+
+	// initialize socket
+	newSocket->m_fd        = fd;
+	newSocket->m_connected = true;
+	newSocket->m_refCount  = 1;
+
+	// discard address if not requested
+	if (addr == &dummy) {
+		ARCH->closeAddr(dummy);
+	}
+
+	return newSocket;
+}
+
+void
+CArchNetworkBSD::connectSocket(CArchSocket s, CArchNetAddress addr)
+{
+	assert(s    != NULL);
+	assert(addr != NULL);
+
+	do {
+		if (connect(s->m_fd, &addr->m_addr, addr->m_len) == -1) {
+			if (errno == EINTR) {
+				// interrupted system call
+				ARCH->testCancelThread();
+				continue;
+			}
+
+			if (errno == EISCONN) {
+				// already connected
+				break;
+			}
+
+			if (errno == EAGAIN) {
+				// connecting
+				throw XArchNetworkConnecting(new XArchEvalUnix(errno));
+			}
+
+			throwError(errno);
+		}
+	} while (false);
+
+	ARCH->lockMutex(m_mutex);
+	s->m_connected = true;
+	ARCH->unlockMutex(m_mutex);
+}
+
+#if HAVE_POLL
+
+int
+CArchNetworkBSD::pollSocket(CPollEntry pe[], int num, double timeout)
+{
+	assert(pe != NULL || num == 0);
+
+	// return if nothing to do
+	if (num == 0) {
+		if (timeout > 0.0) {
+			ARCH->sleep(timeout);
+		}
+		return 0;
+	}
+
+	// allocate space for translated query
+	struct pollfd* pfd = new struct pollfd[num];
+
+	// translate query
+	for (int i = 0; i < num; ++i) {
+		pfd[i].fd     = (pe[i].m_socket == NULL) ? -1 : pe[i].m_socket->m_fd;
+		pfd[i].events = 0;
+		if ((pe[i].m_events & kPOLLIN) != 0) {
+			pfd[i].events |= POLLIN;
+		}
+		if ((pe[i].m_events & kPOLLOUT) != 0) {
+			pfd[i].events |= POLLOUT;
+		}
+	}
+
+	// do the poll
+	int n;
+	do {
+		n = poll(pfd, num, static_cast<int>(1000.0 * timeout));
+		if (n == -1) {
+			if (errno == EINTR) {
+				// interrupted system call
+				ARCH->testCancelThread();
+				continue;
+			}
+			delete[] pfd;
+			throwError(errno);
+		}
+	} while (false);
+
+	// translate back
+	for (int i = 0; i < num; ++i) {
+		pe[i].m_revents = 0;
+		if ((pfd[i].revents & POLLIN) != 0) {
+			pe[i].m_revents |= kPOLLIN;
+		}
+		if ((pfd[i].revents & POLLOUT) != 0) {
+			pe[i].m_revents |= kPOLLOUT;
+		}
+		if ((pfd[i].revents & POLLERR) != 0) {
+			pe[i].m_revents |= kPOLLERR;
+		}
+		if ((pfd[i].revents & POLLNVAL) != 0) {
+			pe[i].m_revents |= kPOLLNVAL;
+		}
+	}
+
+	// done with translated query
+	delete[] pfd;
+
+	return n;
+}
+
+#else
+
+void
+CArchNetworkBSD::pollSocket(CPollEntry pe[], int num, double timeout)
+{
+	int i, n;
+
+	do {
+		// prepare sets for select
+		n = 0;
+		fd_set readSet, writeSet, errSet;
+		fd_set* readSetP  = NULL;
+		fd_set* writeSetP = NULL;
+		fd_set* errSetP   = NULL;
+		FD_ZERO(&readSet);
+		FD_ZERO(&writeSet);
+		FD_ZERO(&errSet);
+		for (i = 0; i < num; ++i) {
+			// reset return flags
+			pe[i].m_revents = 0;
+
+			// set invalid flag if socket is bogus then go to next socket
+			if (pe[i].m_socket == NULL) {
+				pe[i].m_revents |= kPOLLNVAL;
+				continue;
+			}
+
+			int fdi = pe[i].m_socket->m_fd;
+			if (pe[i].m_events & kPOLLIN) {
+				FD_SET(pe[i].m_socket->m_fd, &readSet);
+				readSetP = &readSet;
+				if (fdi > n) {
+					n = fdi;
+				}
+			}
+			if (pe[i].m_events & kPOLLOUT) {
+				FD_SET(pe[i].m_socket->m_fd, &writeSet);
+				writeSetP = &writeSet;
+				if (fdi > n) {
+					n = fdi;
+				}
+			}
+			if (true) {
+				FD_SET(pe[i].m_socket->m_fd, &errSet);
+				errSetP = &errSet;
+				if (fdi > n) {
+					n = fdi;
+				}
+			}
+		}
+
+		// if there are no sockets then don't block forever
+		if (n == 0 && timeout < 0.0) {
+			timeout = 0.0;
+		}
+
+		// prepare timeout for select
+		struct timeval timeout2;
+		struct timeval* timeout2P;
+		if (timeout < 0) {
+			timeout2P = NULL;
+		}
+		else {
+			timeout2P = &timeout2;
+			timeout2.tv_sec  = static_cast<int>(timeout);
+			timeout2.tv_usec = static_cast<int>(1.0e+6 *
+											(timeout - timeout2.tv_sec));
+		}
+
+		// do the select
+		n = select((SELECT_TYPE_ARG1)  n + 1,
+					SELECT_TYPE_ARG234 readSetP,
+					SELECT_TYPE_ARG234 writeSetP,
+					SELECT_TYPE_ARG234 errSetP,
+					SELECT_TYPE_ARG5   timeout2P);
+
+		// handle results
+		if (n == -1) {
+			if (errno == EINTR) {
+				// interrupted system call
+				ARCH->testCancelThread();
+				continue;
+			}
+			throwError(errno);
+		}
+		n = 0;
+		for (i = 0; i < num; ++i) {
+			if (pe[i].m_socket != NULL) {
+				if (FD_ISSET(pe[i].m_socket->m_fd, &readSet)) {
+					pe[i].m_revents |= kPOLLIN;
+				}
+				if (FD_ISSET(pe[i].m_socket->m_fd, &writeSet)) {
+					pe[i].m_revents |= kPOLLOUT;
+				}
+				if (FD_ISSET(pe[i].m_socket->m_fd, &errSet)) {
+					pe[i].m_revents |= kPOLLERR;
+				}
+			}
+			if (pe[i].m_revents != 0) {
+				++n;
+			}
+		}
+	} while (false);
+
+	return n;
+}
+
+#endif
+
+size_t
+CArchNetworkBSD::readSocket(CArchSocket s, void* buf, size_t len)
+{
+	assert(s != NULL);
+
+	ssize_t n;
+	do {
+		n = read(s->m_fd, buf, len);
+		if (n == -1) {
+			if (errno == EINTR) {
+				// interrupted system call
+				ARCH->testCancelThread();
+				continue;
+			}
+			throwError(errno);
+		}
+	} while (false);
+	ARCH->testCancelThread();
+	return n;
+}
+
+size_t
+CArchNetworkBSD::writeSocket(CArchSocket s, const void* buf, size_t len)
+{
+	assert(s != NULL);
+
+	ssize_t n;
+	do {
+		n = write(s->m_fd, buf, len);
+		if (n == -1) {
+			if (errno == EINTR) {
+				// interrupted system call
+				ARCH->testCancelThread();
+				continue;
+			}
+			throwError(errno);
+		}
+	} while (false);
+	ARCH->testCancelThread();
+	return n;
+}
+
+void
+CArchNetworkBSD::throwErrorOnSocket(CArchSocket s)
+{
+	assert(s != NULL);
+
+	// get the error from the socket layer
+	int err        = 0;
+	socklen_t size = sizeof(err);
+	if (getsockopt(s->m_fd, SOL_SOCKET, SO_ERROR, &err, &size) == -1) {
+		err = errno;
+	}
+
+	// throw if there's an error
+	if (err != 0) {
+		throwError(err);
+	}
+}
+
+bool
+CArchNetworkBSD::setBlockingOnSocket(CArchSocket s, bool blocking)
+{
+	assert(s != NULL);
+
+	int mode = fcntl(s->m_fd, F_GETFL, 0);
+	if (mode == -1) {
+		throwError(errno);
+	}
+	bool old = ((mode & O_NDELAY) == 0);
+	if (blocking) {
+		mode &= ~O_NDELAY;
+	}
+	else {
+		mode |= O_NDELAY;
+	}
+	if (fcntl(s->m_fd, F_SETFL, mode) == -1) {
+		throwError(errno);
+	}
+	return old;
+}
+
+bool
+CArchNetworkBSD::setNoDelayOnSocket(CArchSocket s, bool noDelay)
+{
+	assert(s != NULL);
+
+	// get old state
+	int oflag;
+	socklen_t size = sizeof(oflag);
+	if (getsockopt(s->m_fd, IPPROTO_TCP, TCP_NODELAY, &oflag, &size) == -1) {
+		throwError(errno);
+	}
+
+	int flag = noDelay ? 1 : 0;
+	size     = sizeof(flag);
+	if (setsockopt(s->m_fd, IPPROTO_TCP, TCP_NODELAY, &flag, size) == -1) {
+		throwError(errno);
+	}
+
+	return (oflag != 0);
+}
+
+std::string
+CArchNetworkBSD::getHostName()
+{
+	char name[256];
+	if (gethostname(name, sizeof(name)) == -1) {
+		name[0] = '\0';
+	}
+	else {
+		name[sizeof(name) - 1] = '\0';
+	}
+	return name;
+}
+
+CArchNetAddress
+CArchNetworkBSD::newAnyAddr(EAddressFamily family)
+{
+	// allocate address
+	CArchNetAddressImpl* addr = new CArchNetAddressImpl;
+
+	// fill it in
+	switch (family) {
+	case kINET: {
+		struct sockaddr_in* ipAddr =
+			reinterpret_cast<struct sockaddr_in*>(&addr->m_addr);
+		ipAddr->sin_family         = AF_INET;
+		ipAddr->sin_port           = 0;
+		ipAddr->sin_addr.s_addr    = INADDR_ANY;
+		addr->m_len                = sizeof(struct sockaddr_in);
+		break;
+	}
+
+	default:
+		delete addr;
+		assert(0 && "invalid family");
+	}
+
+	return addr;
+}
+
+CArchNetAddress
+CArchNetworkBSD::copyAddr(CArchNetAddress addr)
+{
+	assert(addr != NULL);
+
+	// allocate and copy address
+	return new CArchNetAddressImpl(*addr);
+}
+
+CArchNetAddress
+CArchNetworkBSD::nameToAddr(const std::string& name)
+{
+	// allocate address
+	CArchNetAddressImpl* addr = new CArchNetAddressImpl;
+
+	// try to convert assuming an IPv4 dot notation address
+	struct sockaddr_in inaddr;
+	memset(&inaddr, 0, sizeof(inaddr));
+	if (inet_aton(name.c_str(), &inaddr.sin_addr) != 0) {
+		// it's a dot notation address
+		addr->m_len       = sizeof(struct sockaddr_in);
+		inaddr.sin_family = AF_INET;
+		inaddr.sin_port   = 0;
+		memcpy(&addr->m_addr, &inaddr, addr->m_len);
+	}
+
+	else {
+		// mutexed address lookup (ugh)
+		ARCH->lockMutex(m_mutex);
+		struct hostent* info = gethostbyname(name.c_str());
+		if (info == NULL) {
+			ARCH->unlockMutex(m_mutex);
+			delete addr;
+			throwNameError(h_errno);
+		}
+
+		// copy over address (only IPv4 currently supported)
+		addr->m_len       = sizeof(struct sockaddr_in);
+		inaddr.sin_family = info->h_addrtype;
+		inaddr.sin_port   = 0;
+		memcpy(&inaddr.sin_addr, info->h_addr_list[0], info->h_length);
+		memcpy(&addr->m_addr, &inaddr, addr->m_len);
+
+		// done with static buffer
+		ARCH->unlockMutex(m_mutex);
+	}
+
+	return addr;
+}
+
+void
+CArchNetworkBSD::closeAddr(CArchNetAddress addr)
+{
+	assert(addr != NULL);
+
+	delete addr;
+}
+
+std::string
+CArchNetworkBSD::addrToName(CArchNetAddress addr)
+{
+	assert(addr != NULL);
+
+	// mutexed name lookup (ugh)
+	ARCH->lockMutex(m_mutex);
+	struct hostent* info = gethostbyaddr(&addr->m_addr, addr->m_len,
+										addr->m_addr.sa_family);
+	if (info == NULL) {
+		ARCH->unlockMutex(m_mutex);
+		throwNameError(h_errno);
+	}
+
+	// save (primary) name
+	std::string name = info->h_name;
+
+	// done with static buffer
+	ARCH->unlockMutex(m_mutex);
+
+	return name;
+}
+
+std::string
+CArchNetworkBSD::addrToString(CArchNetAddress addr)
+{
+	assert(addr != NULL);
+
+	switch (getAddrFamily(addr)) {
+	case kINET: {
+		struct sockaddr_in* ipAddr =
+			reinterpret_cast<struct sockaddr_in*>(&addr->m_addr);
+		ARCH->lockMutex(m_mutex);
+		std::string s = inet_ntoa(ipAddr->sin_addr);
+		ARCH->unlockMutex(m_mutex);
+		return s;
+	}
+
+	default:
+		assert(0 && "unknown address family");
+		return "";
+	}
+}
+
+IArchNetwork::EAddressFamily
+CArchNetworkBSD::getAddrFamily(CArchNetAddress addr)
+{
+	assert(addr != NULL);
+
+	switch (addr->m_addr.sa_family) {
+	case AF_INET:
+		return kINET;
+
+	default:
+		return kUNKNOWN;
+	}
+}
+
+void
+CArchNetworkBSD::setAddrPort(CArchNetAddress addr, int port)
+{
+	assert(addr != NULL);
+
+	switch (getAddrFamily(addr)) {
+	case kINET: {
+		struct sockaddr_in* ipAddr =
+			reinterpret_cast<struct sockaddr_in*>(&addr->m_addr);
+		ipAddr->sin_port = htons(port);
+		break;
+	}
+
+	default:
+		assert(0 && "unknown address family");
+		break;
+	}
+}
+
+int
+CArchNetworkBSD::getAddrPort(CArchNetAddress addr)
+{
+	assert(addr != NULL);
+
+	switch (getAddrFamily(addr)) {
+	case kINET: {
+		struct sockaddr_in* ipAddr =
+			reinterpret_cast<struct sockaddr_in*>(&addr->m_addr);
+		return ntohs(ipAddr->sin_port);
+	}
+
+	default:
+		assert(0 && "unknown address family");
+		return 0;
+	}
+}
+
+bool
+CArchNetworkBSD::isAnyAddr(CArchNetAddress addr)
+{
+	assert(addr != NULL);
+
+	switch (getAddrFamily(addr)) {
+	case kINET: {
+		struct sockaddr_in* ipAddr =
+			reinterpret_cast<struct sockaddr_in*>(&addr->m_addr);
+		return (ipAddr->sin_addr.s_addr == INADDR_ANY &&
+				addr->m_len == sizeof(struct sockaddr_in));
+	}
+
+	default:
+		assert(0 && "unknown address family");
+		return true;
+	}
+}
+
+void
+CArchNetworkBSD::throwError(int err)
+{
+	switch (err) {
+	case EAGAIN:
+		throw XArchNetworkWouldBlock(new XArchEvalUnix(err));
+
+	case EACCES:
+	case EPERM:
+		throw XArchNetworkAccess(new XArchEvalUnix(err));
+
+	case ENFILE:
+	case EMFILE:
+	case ENODEV:
+	case ENOBUFS:
+	case ENOMEM:
+	case ENOSR:
+	case ENETDOWN:
+		throw XArchNetworkResource(new XArchEvalUnix(err));
+
+	case EPROTOTYPE:
+	case EPROTONOSUPPORT:
+	case EAFNOSUPPORT:
+	case EPFNOSUPPORT:
+	case ESOCKTNOSUPPORT:
+	case EINVAL:
+	case ENOPROTOOPT:
+	case EOPNOTSUPP:
+	case ENOPKG:
+	case ESHUTDOWN:
+		throw XArchNetworkSupport(new XArchEvalUnix(err));
+
+	case EIO:
+		throw XArchNetworkIO(new XArchEvalUnix(err));
+
+	case EADDRNOTAVAIL:
+		throw XArchNetworkNoAddress(new XArchEvalUnix(err));
+
+	case EADDRINUSE:
+		throw XArchNetworkAddressInUse(new XArchEvalUnix(err));
+
+	case EHOSTUNREACH:
+	case ENETUNREACH:
+		throw XArchNetworkNoRoute(new XArchEvalUnix(err));
+
+	case ENOTCONN:
+		throw XArchNetworkNotConnected(new XArchEvalUnix(err));
+
+	case EPIPE:
+	case ECONNABORTED:
+	case ECONNRESET:
+		throw XArchNetworkDisconnected(new XArchEvalUnix(err));
+
+	case ECONNREFUSED:
+		throw XArchNetworkConnectionRefused(new XArchEvalUnix(err));
+
+	case EINPROGRESS:
+	case EALREADY:
+		throw XArchNetworkConnecting(new XArchEvalUnix(err));
+
+	case EHOSTDOWN:
+	case ETIMEDOUT:
+		throw XArchNetworkTimedOut(new XArchEvalUnix(err));
+
+	default:
+		throw XArchNetwork(new XArchEvalUnix(err));
+	}
+}
+
+void
+CArchNetworkBSD::throwNameError(int err)
+{
+	static const char* s_msg[] = {
+		"The specified host is unknown",
+		"The requested name is valid but does not have an IP address",
+		"A non-recoverable name server error occurred",
+		"A temporary error occurred on an authoritative name server",
+		"An unknown name server error occurred"
+	};
+
+	switch (err) {
+	case HOST_NOT_FOUND:
+		throw XArchNetworkNameUnknown(s_msg[0]);
+
+	case NO_DATA:
+		throw XArchNetworkNameNoAddress(s_msg[1]);
+
+	case NO_RECOVERY:
+		throw XArchNetworkNameFailure(s_msg[2]);
+
+	case TRY_AGAIN:
+		throw XArchNetworkNameUnavailable(s_msg[3]);
+
+	default:
+		throw XArchNetworkName(s_msg[4]);
+	}
+}