The Tor Browser: nsprpub/pr/src/io/prsocket.c@ca08bd8f51b2 (annotated)

nsprpub/pr/src/io/prsocket.c@ca08bd8f51b2 (annotated)

nsprpub/pr/src/io/prsocket.c

Wed, 31 Dec 2014 06:55:46 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:46 +0100
changeset 1: ca08bd8f51b2
permissions: -rw-r--r--

Added tag TORBROWSER_REPLICA for changeset 6474c204b198

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "primpl.h"
 #include <string.h>
 /************************************************************************/
 /* These two functions are only used in assertions. */
 #if defined(DEBUG)
 PRBool IsValidNetAddr(const PRNetAddr *addr)
 {
     if ((addr != NULL)
 #if defined(XP_UNIX) || defined(XP_OS2)
 	    && (addr->raw.family != PR_AF_LOCAL)
 #endif
 	    && (addr->raw.family != PR_AF_INET6)
 	    && (addr->raw.family != PR_AF_INET)) {
         return PR_FALSE;
     }
     return PR_TRUE;
 }
 static PRBool IsValidNetAddrLen(const PRNetAddr *addr, PRInt32 addr_len)
 {
     /*
      * The definition of the length of a Unix domain socket address
      * is not uniform, so we don't check it.
      */
     if ((addr != NULL)
 #if defined(XP_UNIX) || defined(XP_OS2)
             && (addr->raw.family != AF_UNIX)
 #endif
             && (PR_NETADDR_SIZE(addr) != addr_len)) {
 #if defined(LINUX) && __GLIBC__ == 2 && __GLIBC_MINOR__ == 1
         /*
          * In glibc 2.1, struct sockaddr_in6 is 24 bytes.  In glibc 2.2
          * and in the 2.4 kernel, struct sockaddr_in6 has the scope_id
          * field and is 28 bytes.  It is possible for socket functions
          * to return an addr_len greater than sizeof(struct sockaddr_in6).
          * We need to allow that.  (Bugzilla bug #77264)
          */
         if ((PR_AF_INET6 == addr->raw.family)
                 && (sizeof(addr->ipv6) == addr_len)) {
             return PR_TRUE;
         }
 #endif
         /*
          * The accept(), getsockname(), etc. calls on some platforms
          * do not set the actual socket address length on return.
          * In this case, we verifiy addr_len is still the value we
          * passed in (i.e., sizeof(PRNetAddr)).
          */
 #if defined(QNX)
         if (sizeof(PRNetAddr) == addr_len) {
             return PR_TRUE;
         }
 #endif
         return PR_FALSE;
     }
     return PR_TRUE;
 }
 #endif /* DEBUG */
 static PRInt32 PR_CALLBACK SocketWritev(PRFileDesc *fd, const PRIOVec *iov,
 PRInt32 iov_size, PRIntervalTime timeout)
 {
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	int w = 0;
 	const PRIOVec *tmp_iov;
 #define LOCAL_MAXIOV    8
 	PRIOVec local_iov[LOCAL_MAXIOV];
 	PRIOVec *iov_copy = NULL;
 	int tmp_out;
 	int index, iov_cnt;
 	int count=0, sz = 0;    /* 'count' is the return value. */
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
     /*
      * Assume the first writev will succeed.  Copy iov's only on
      * failure.
      */
     tmp_iov = iov;
     for (index = 0; index < iov_size; index++)
         sz += iov[index].iov_len;
 	iov_cnt = iov_size;
 	while (sz > 0) {
 		w = _PR_MD_WRITEV(fd, tmp_iov, iov_cnt, timeout);
 		if (w < 0) {
 			count = -1;
 			break;
 		}
 		count += w;
 		if (fd->secret->nonblocking) {
 			break;
 		}
 		sz -= w;
 		if (sz > 0) {
 			/* find the next unwritten vector */
 			for ( index = 0, tmp_out = count;
 				tmp_out >= iov[index].iov_len;
 				tmp_out -= iov[index].iov_len, index++){;} /* nothing to execute */
 			if (tmp_iov == iov) {
 				/*
 				 * The first writev failed so we
 				 * must copy iov's around.
 				 * Avoid calloc/free if there
 				 * are few enough iov's.
 				 */
 				if (iov_size - index <= LOCAL_MAXIOV)
 					iov_copy = local_iov;
 				else if ((iov_copy = (PRIOVec *) PR_CALLOC((iov_size - index) *
 					sizeof *iov_copy)) == NULL) {
 					PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
 					return -1;
 				}
 				tmp_iov = iov_copy;
 			}
 			PR_ASSERT(tmp_iov == iov_copy);
 			/* fill in the first partial read */
 			iov_copy[0].iov_base = &(((char *)iov[index].iov_base)[tmp_out]);
 			iov_copy[0].iov_len = iov[index].iov_len - tmp_out;
 			index++;
 			/* copy the remaining vectors */
 			for (iov_cnt=1; index<iov_size; iov_cnt++, index++) {
 				iov_copy[iov_cnt].iov_base = iov[index].iov_base;
 				iov_copy[iov_cnt].iov_len = iov[index].iov_len;
 			}
 		}
 	}
 	if (iov_copy != local_iov)
 		PR_DELETE(iov_copy);
 	return count;
 }
 /************************************************************************/
 PR_IMPLEMENT(PRFileDesc *) PR_ImportTCPSocket(PROsfd osfd)
 {
 PRFileDesc *fd;
 	if (!_pr_initialized) _PR_ImplicitInitialization();
 	fd = PR_AllocFileDesc(osfd, PR_GetTCPMethods());
 	if (fd != NULL) {
 		_PR_MD_MAKE_NONBLOCK(fd);
 		_PR_MD_INIT_FD_INHERITABLE(fd, PR_TRUE);
 #ifdef _PR_NEED_SECRET_AF
 		/* this means we can only import IPv4 sockets here.
 		 * but this is what the function in ptio.c does.
 		 * We need a way to import IPv6 sockets, too.
 		 */
 		fd->secret->af = AF_INET;
 #endif
 	} else
 		_PR_MD_CLOSE_SOCKET(osfd);
 	return(fd);
 }
 PR_IMPLEMENT(PRFileDesc *) PR_ImportUDPSocket(PROsfd osfd)
 {
 PRFileDesc *fd;
 	if (!_pr_initialized) _PR_ImplicitInitialization();
 	fd = PR_AllocFileDesc(osfd, PR_GetUDPMethods());
 	if (fd != NULL) {
 		_PR_MD_MAKE_NONBLOCK(fd);
 		_PR_MD_INIT_FD_INHERITABLE(fd, PR_TRUE);
 	} else
 		_PR_MD_CLOSE_SOCKET(osfd);
 	return(fd);
 }
 static const PRIOMethods* PR_GetSocketPollFdMethods(void);
 PR_IMPLEMENT(PRFileDesc*) PR_CreateSocketPollFd(PROsfd osfd)
 {
     PRFileDesc *fd;
     if (!_pr_initialized) _PR_ImplicitInitialization();
     fd = _PR_Getfd();
     if (fd == NULL) PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
     else
     {
         fd->secret->md.osfd = osfd;
         fd->secret->inheritable = _PR_TRI_FALSE;
     	fd->secret->state = _PR_FILEDESC_OPEN;
         fd->methods = PR_GetSocketPollFdMethods();
     }
     return fd;
 }  /* PR_CreateSocketPollFD */
 PR_IMPLEMENT(PRStatus) PR_DestroySocketPollFd(PRFileDesc *fd)
 {
     if (NULL == fd)
     {
         PR_SetError(PR_BAD_DESCRIPTOR_ERROR, 0);
         return PR_FAILURE;
     }
     fd->secret->state = _PR_FILEDESC_CLOSED;
     _PR_Putfd(fd);
     return PR_SUCCESS;
 }  /* PR_DestroySocketPollFd */
 static PRStatus PR_CALLBACK SocketConnect(
     PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout)
 {
 	PRInt32 rv;    /* Return value of _PR_MD_CONNECT */
     const PRNetAddr *addrp = addr;
 #if defined(_PR_INET6)
 	PRNetAddr addrCopy;
 #endif
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return PR_FAILURE;
 	}
 #if defined(_PR_INET6)
 	if (addr->raw.family == PR_AF_INET6) {
 		addrCopy = *addr;
 		addrCopy.raw.family = AF_INET6;
 		addrp = &addrCopy;
 	}
 #endif
 	rv = _PR_MD_CONNECT(fd, addrp, PR_NETADDR_SIZE(addr), timeout);
 	PR_LOG(_pr_io_lm, PR_LOG_MAX, ("connect -> %d", rv));
 	if (rv == 0)
 		return PR_SUCCESS;
 	else
 		return PR_FAILURE;
 }
 static PRStatus PR_CALLBACK SocketConnectContinue(
     PRFileDesc *fd, PRInt16 out_flags)
 {
     PROsfd osfd;
     int err;
     if (out_flags & PR_POLL_NVAL) {
         PR_SetError(PR_BAD_DESCRIPTOR_ERROR, 0);
         return PR_FAILURE;
     }
     if ((out_flags & (PR_POLL_WRITE | PR_POLL_EXCEPT | PR_POLL_ERR)) == 0) {
         PR_ASSERT(out_flags == 0);
         PR_SetError(PR_IN_PROGRESS_ERROR, 0);
         return PR_FAILURE;
     }
     osfd = fd->secret->md.osfd;
 #if defined(XP_UNIX)
     err = _MD_unix_get_nonblocking_connect_error(osfd);
     if (err != 0) {
         _PR_MD_MAP_CONNECT_ERROR(err);
         return PR_FAILURE;
     }
     return PR_SUCCESS;
 #elif defined(WIN32) || defined(WIN16)
     if (out_flags & PR_POLL_EXCEPT) {
         int len = sizeof(err);
         if (getsockopt(osfd, (int)SOL_SOCKET, SO_ERROR, (char *) &err, &len)
                 == SOCKET_ERROR) {
             _PR_MD_MAP_GETSOCKOPT_ERROR(WSAGetLastError());
             return PR_FAILURE;
         }
         if (err != 0) {
             _PR_MD_MAP_CONNECT_ERROR(err);
         } else {
             PR_SetError(PR_UNKNOWN_ERROR, 0);
         }
         return PR_FAILURE;
     }
     PR_ASSERT(out_flags & PR_POLL_WRITE);
     return PR_SUCCESS;
 #elif defined(XP_OS2)
     err = _MD_os2_get_nonblocking_connect_error(osfd);
     if (err != 0) {
         _PR_MD_MAP_CONNECT_ERROR(err);
         return PR_FAILURE;
     }
     return PR_SUCCESS;
 #elif defined(XP_BEOS)
 #ifdef BONE_VERSION  /* bug 122364 */
     /* temporary workaround until getsockopt(SO_ERROR) works in BONE */
     if (out_flags & PR_POLL_EXCEPT) {
         PR_SetError(PR_CONNECT_REFUSED_ERROR, 0);
         return PR_FAILURE;
     }
     PR_ASSERT(out_flags & PR_POLL_WRITE);
     return PR_SUCCESS;
 #else
     err = _MD_beos_get_nonblocking_connect_error(fd);
     if( err != 0 ) {
         _PR_MD_MAP_CONNECT_ERROR(err);
         return PR_FAILURE;
     }
     else
         return PR_SUCCESS;
 #endif /* BONE_VERSION */
 #else
     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
     return PR_FAILURE;
 #endif
 }
 PR_IMPLEMENT(PRStatus) PR_GetConnectStatus(const PRPollDesc *pd)
 {
     /* Find the NSPR layer and invoke its connectcontinue method */
     PRFileDesc *bottom = PR_GetIdentitiesLayer(pd->fd, PR_NSPR_IO_LAYER);
     if (NULL == bottom) {
         PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
         return PR_FAILURE;
     }
     return SocketConnectContinue(bottom, pd->out_flags);
 }
 static PRFileDesc* PR_CALLBACK SocketAccept(PRFileDesc *fd, PRNetAddr *addr,
 PRIntervalTime timeout)
 {
 	PROsfd osfd;
 	PRFileDesc *fd2;
 	PRUint32 al;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 #ifdef WINNT
 	PRNetAddr addrCopy;
 #endif
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return 0;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return 0;
 	}
 #ifdef WINNT
 	if (addr == NULL) {
 		addr = &addrCopy;
 	}
 #endif
 	al = sizeof(PRNetAddr);
 	osfd = _PR_MD_ACCEPT(fd, addr, &al, timeout);
 	if (osfd == -1)
 		return 0;
 	fd2 = PR_AllocFileDesc(osfd, PR_GetTCPMethods());
 	if (!fd2) {
 		_PR_MD_CLOSE_SOCKET(osfd);
 		return NULL;
 	}
 	fd2->secret->nonblocking = fd->secret->nonblocking;
 	fd2->secret->inheritable = fd->secret->inheritable;
 #ifdef WINNT
 	if (!fd2->secret->nonblocking && fd2->secret->inheritable != _PR_TRI_TRUE) {
 		/*
 		 * The new socket has been associated with an I/O
 		 * completion port.  There is no going back.
 		 */
 		fd2->secret->md.io_model_committed = PR_TRUE;
 	}
 	PR_ASSERT(al == PR_NETADDR_SIZE(addr));
 	fd2->secret->md.accepted_socket = PR_TRUE;
 	memcpy(&fd2->secret->md.peer_addr, addr, al);
 #endif
 	/*
 	 * On some platforms, the new socket created by accept()
 	 * inherits the nonblocking (or overlapped io) attribute
 	 * of the listening socket.  As an optimization, these
 	 * platforms can skip the following _PR_MD_MAKE_NONBLOCK
 	 * call.
 	 */
 #if !defined(SOLARIS) && !defined(IRIX) && !defined(WINNT)
 	_PR_MD_MAKE_NONBLOCK(fd2);
 #endif
 #ifdef _PR_INET6
 	if (addr && (AF_INET6 == addr->raw.family))
         addr->raw.family = PR_AF_INET6;
 #endif
 	PR_ASSERT(IsValidNetAddr(addr) == PR_TRUE);
 	PR_ASSERT(IsValidNetAddrLen(addr, al) == PR_TRUE);
 	return fd2;
 }
 #ifdef WINNT
 PR_IMPLEMENT(PRFileDesc*) PR_NTFast_Accept(PRFileDesc *fd, PRNetAddr *addr,
 PRIntervalTime timeout)
 {
 	PROsfd osfd;
 	PRFileDesc *fd2;
 	PRIntn al;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	PRNetAddr addrCopy;
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return 0;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return 0;
 	}
 		if (addr == NULL) {
 			addr = &addrCopy;
 		}
 		al = PR_NETADDR_SIZE(addr);
 		osfd = _PR_MD_FAST_ACCEPT(fd, addr, &al, timeout, PR_TRUE, NULL, NULL);
 		if (osfd == -1) {
 			return 0;
 		}
 	fd2 = PR_AllocFileDesc(osfd, PR_GetTCPMethods());
 	if (!fd2) {
 		_PR_MD_CLOSE_SOCKET(osfd);
 	} else {
 		fd2->secret->nonblocking = fd->secret->nonblocking;
 		fd2->secret->md.io_model_committed = PR_TRUE;
 	        PR_ASSERT(al == PR_NETADDR_SIZE(addr));
         	fd2->secret->md.accepted_socket = PR_TRUE;
         	memcpy(&fd2->secret->md.peer_addr, addr, al);
 #ifdef _PR_INET6
 		if (AF_INET6 == addr->raw.family)
         	addr->raw.family = PR_AF_INET6;
 #endif
 #ifdef _PR_NEED_SECRET_AF
 		fd2->secret->af = fd->secret->af;
 #endif
 	}
 	return fd2;
 }
 #endif /* WINNT */
 static PRStatus PR_CALLBACK SocketBind(PRFileDesc *fd, const PRNetAddr *addr)
 {
 	PRInt32 result;
     const PRNetAddr *addrp = addr;
 #if defined(_PR_INET6)
 	PRNetAddr addrCopy;
 #endif
 	PR_ASSERT(IsValidNetAddr(addr) == PR_TRUE);
 #ifdef XP_UNIX
 	if (addr->raw.family == AF_UNIX) {
 		/* Disallow relative pathnames */
 		if (addr->local.path[0] != '/') {
 			PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
 			return PR_FAILURE;
 		}
 	}
 #endif /* XP_UNIX */
 #if defined(_PR_INET6)
 	if (addr->raw.family == PR_AF_INET6) {
 		addrCopy = *addr;
 		addrCopy.raw.family = AF_INET6;
 		addrp = &addrCopy;
 	}
 #endif
 	result = _PR_MD_BIND(fd, addrp, PR_NETADDR_SIZE(addr));
 	if (result < 0) {
 		return PR_FAILURE;
 	}
 	return PR_SUCCESS;
 }
 static PRStatus PR_CALLBACK SocketListen(PRFileDesc *fd, PRIntn backlog)
 {
 	PRInt32 result;
 	result = _PR_MD_LISTEN(fd, backlog);
 	if (result < 0) {
 		return PR_FAILURE;
 	}
 	return PR_SUCCESS;
 }
 static PRStatus PR_CALLBACK SocketShutdown(PRFileDesc *fd, PRIntn how)
 {
 	PRInt32 result;
 	result = _PR_MD_SHUTDOWN(fd, how);
 	if (result < 0) {
 		return PR_FAILURE;
 	}
 	return PR_SUCCESS;
 }
 static PRInt32 PR_CALLBACK SocketRecv(PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags,
 PRIntervalTime timeout)
 {
 	PRInt32 rv;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	if ((flags != 0) && (flags != PR_MSG_PEEK)) {
 		PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
 	PR_LOG(_pr_io_lm, PR_LOG_MAX,
 		("recv: fd=%p osfd=%" PR_PRIdOSFD " buf=%p amount=%d flags=%d",
 		fd, fd->secret->md.osfd, buf, amount, flags));
 #ifdef _PR_HAVE_PEEK_BUFFER
 	if (fd->secret->peekBytes != 0) {
 		rv = (amount < fd->secret->peekBytes) ?
 			amount : fd->secret->peekBytes;
 		memcpy(buf, fd->secret->peekBuffer, rv);
 		if (flags == 0) {
 			/* consume the bytes in the peek buffer */
 			fd->secret->peekBytes -= rv;
 			if (fd->secret->peekBytes != 0) {
 				memmove(fd->secret->peekBuffer,
 					fd->secret->peekBuffer + rv,
 					fd->secret->peekBytes);
 			}
 		}
 		return rv;
 	}
 	/* allocate peek buffer, if necessary */
 	if ((PR_MSG_PEEK == flags) && _PR_FD_NEED_EMULATE_MSG_PEEK(fd)) {
 		PR_ASSERT(0 == fd->secret->peekBytes);
 		/* impose a max size on the peek buffer */
 		if (amount > _PR_PEEK_BUFFER_MAX) {
 			amount = _PR_PEEK_BUFFER_MAX;
 		}
 		if (fd->secret->peekBufSize < amount) {
 			if (fd->secret->peekBuffer) {
 				PR_Free(fd->secret->peekBuffer);
 			}
 			fd->secret->peekBufSize = amount;
 			fd->secret->peekBuffer = PR_Malloc(amount);
 			if (NULL == fd->secret->peekBuffer) {
 				fd->secret->peekBufSize = 0;
 				PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
 				return -1;
 			}
 		}
 	}
 #endif
 	rv = _PR_MD_RECV(fd, buf, amount, flags, timeout);
 	PR_LOG(_pr_io_lm, PR_LOG_MAX, ("recv -> %d, error = %d, os error = %d",
 		rv, PR_GetError(), PR_GetOSError()));
 #ifdef _PR_HAVE_PEEK_BUFFER
 	if ((PR_MSG_PEEK == flags) && _PR_FD_NEED_EMULATE_MSG_PEEK(fd)) {
 		if (rv > 0) {
 			memcpy(fd->secret->peekBuffer, buf, rv);
 			fd->secret->peekBytes = rv;
 		}
 	}
 #endif
 	return rv;
 }
 static PRInt32 PR_CALLBACK SocketRead(PRFileDesc *fd, void *buf, PRInt32 amount)
 {
 	return SocketRecv(fd, buf, amount, 0, PR_INTERVAL_NO_TIMEOUT);
 }
 static PRInt32 PR_CALLBACK SocketSend(PRFileDesc *fd, const void *buf, PRInt32 amount,
 PRIntn flags, PRIntervalTime timeout)
 {
 	PRInt32 temp, count;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
 	count = 0;
 	while (amount > 0) {
 		PR_LOG(_pr_io_lm, PR_LOG_MAX,
 		    ("send: fd=%p osfd=%" PR_PRIdOSFD " buf=%p amount=%d",
 		    fd, fd->secret->md.osfd, buf, amount));
 		temp = _PR_MD_SEND(fd, buf, amount, flags, timeout);
 		if (temp < 0) {
 					count = -1;
 					break;
 				}
 		count += temp;
 		if (fd->secret->nonblocking) {
 			break;
 		}
 		buf = (const void*) ((const char*)buf + temp);
 		amount -= temp;
 	}
 	PR_LOG(_pr_io_lm, PR_LOG_MAX, ("send -> %d", count));
 	return count;
 }
 static PRInt32 PR_CALLBACK SocketWrite(PRFileDesc *fd, const void *buf, PRInt32 amount)
 {
 	return SocketSend(fd, buf, amount, 0, PR_INTERVAL_NO_TIMEOUT);
 }
 static PRStatus PR_CALLBACK SocketClose(PRFileDesc *fd)
 {
 	if (!fd || !fd->secret
 			|| (fd->secret->state != _PR_FILEDESC_OPEN
 			&& fd->secret->state != _PR_FILEDESC_CLOSED)) {
 		PR_SetError(PR_BAD_DESCRIPTOR_ERROR, 0);
 		return PR_FAILURE;
 	}
 	if (fd->secret->state == _PR_FILEDESC_OPEN) {
 		if (_PR_MD_CLOSE_SOCKET(fd->secret->md.osfd) < 0) {
 			return PR_FAILURE;
 		}
 		fd->secret->state = _PR_FILEDESC_CLOSED;
 	}
 #ifdef _PR_HAVE_PEEK_BUFFER
 	if (fd->secret->peekBuffer) {
 		PR_ASSERT(fd->secret->peekBufSize > 0);
 		PR_DELETE(fd->secret->peekBuffer);
 		fd->secret->peekBufSize = 0;
 		fd->secret->peekBytes = 0;
 	}
 #endif
 	PR_FreeFileDesc(fd);
 	return PR_SUCCESS;
 }
 static PRInt32 PR_CALLBACK SocketAvailable(PRFileDesc *fd)
 {
 	PRInt32 rv;
 #ifdef _PR_HAVE_PEEK_BUFFER
 	if (fd->secret->peekBytes != 0) {
 		return fd->secret->peekBytes;
 	}
 #endif
 	rv =  _PR_MD_SOCKETAVAILABLE(fd);
 	return rv;
 }
 static PRInt64 PR_CALLBACK SocketAvailable64(PRFileDesc *fd)
 {
     PRInt64 rv;
 #ifdef _PR_HAVE_PEEK_BUFFER
     if (fd->secret->peekBytes != 0) {
         LL_I2L(rv, fd->secret->peekBytes);
         return rv;
     }
 #endif
     LL_I2L(rv, _PR_MD_SOCKETAVAILABLE(fd));
 	return rv;
 }
 static PRStatus PR_CALLBACK SocketSync(PRFileDesc *fd)
 {
 	return PR_SUCCESS;
 }
 static PRInt32 PR_CALLBACK SocketSendTo(
     PRFileDesc *fd, const void *buf, PRInt32 amount,
     PRIntn flags, const PRNetAddr *addr, PRIntervalTime timeout)
 {
 	PRInt32 temp, count;
     const PRNetAddr *addrp = addr;
 #if defined(_PR_INET6)
 	PRNetAddr addrCopy;
 #endif
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
 	PR_ASSERT(IsValidNetAddr(addr) == PR_TRUE);
 #if defined(_PR_INET6)
 	if (addr->raw.family == PR_AF_INET6) {
 		addrCopy = *addr;
 		addrCopy.raw.family = AF_INET6;
 		addrp = &addrCopy;
 	}
 #endif
 	count = 0;
 	while (amount > 0) {
 		temp = _PR_MD_SENDTO(fd, buf, amount, flags,
 		    addrp, PR_NETADDR_SIZE(addr), timeout);
 		if (temp < 0) {
 					count = -1;
 					break;
 				}
 		count += temp;
 		if (fd->secret->nonblocking) {
 			break;
 		}
 		buf = (const void*) ((const char*)buf + temp);
 		amount -= temp;
 	}
 	return count;
 }
 static PRInt32 PR_CALLBACK SocketRecvFrom(PRFileDesc *fd, void *buf, PRInt32 amount,
 PRIntn flags, PRNetAddr *addr, PRIntervalTime timeout)
 {
 	PRInt32 rv;
 	PRUint32 al;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
 	al = sizeof(PRNetAddr);
 	rv = _PR_MD_RECVFROM(fd, buf, amount, flags, addr, &al, timeout);
 #ifdef _PR_INET6
 	if (addr && (AF_INET6 == addr->raw.family))
         addr->raw.family = PR_AF_INET6;
 #endif
 	return rv;
 }
 static PRInt32 PR_CALLBACK SocketAcceptRead(PRFileDesc *sd, PRFileDesc **nd,
 PRNetAddr **raddr, void *buf, PRInt32 amount,
 PRIntervalTime timeout)
 {
 	PRInt32 rv;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
 	/* The socket must be in blocking mode. */
 	if (sd->secret->nonblocking) {
 		PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
 		return -1;
 	}
 	*nd = NULL;
 #if defined(WINNT)
 	{
 	PROsfd newSock;
 	PRNetAddr *raddrCopy;
 	if (raddr == NULL) {
 		raddr = &raddrCopy;
 	}
 	rv = _PR_MD_ACCEPT_READ(sd, &newSock, raddr, buf, amount, timeout);
 	if (rv < 0) {
 		rv = -1;
 	} else {
 		/* Successfully accepted and read; create the new PRFileDesc */
 		*nd = PR_AllocFileDesc(newSock, PR_GetTCPMethods());
 		if (*nd == 0) {
 			_PR_MD_CLOSE_SOCKET(newSock);
 			/* PR_AllocFileDesc() has invoked PR_SetError(). */
 			rv = -1;
 		} else {
 			(*nd)->secret->md.io_model_committed = PR_TRUE;
 			(*nd)->secret->md.accepted_socket = PR_TRUE;
 			memcpy(&(*nd)->secret->md.peer_addr, *raddr,
 				PR_NETADDR_SIZE(*raddr));
 #ifdef _PR_INET6
 			if (AF_INET6 == *raddr->raw.family)
         		*raddr->raw.family = PR_AF_INET6;
 #endif
 		}
 	}
 	}
 #else
 	rv = PR_EmulateAcceptRead(sd, nd, raddr, buf, amount, timeout);
 #endif
 	return rv;
 }
 #ifdef WINNT
 PR_IMPLEMENT(PRInt32) PR_NTFast_AcceptRead(PRFileDesc *sd, PRFileDesc **nd,
 PRNetAddr **raddr, void *buf, PRInt32 amount,
 PRIntervalTime timeout)
 {
 	PRInt32 rv;
 	PROsfd newSock;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	PRNetAddr *raddrCopy;
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
 	*nd = NULL;
 	if (raddr == NULL) {
 		raddr = &raddrCopy;
 	}
 	rv = _PR_MD_FAST_ACCEPT_READ(sd, &newSock, raddr, buf, amount,
 	    timeout, PR_TRUE, NULL, NULL);
 	if (rv < 0) {
 		rv = -1;
 	} else {
 		/* Successfully accepted and read; create the new PRFileDesc */
 		*nd = PR_AllocFileDesc(newSock, PR_GetTCPMethods());
 		if (*nd == 0) {
 			_PR_MD_CLOSE_SOCKET(newSock);
 			/* PR_AllocFileDesc() has invoked PR_SetError(). */
 			rv = -1;
 		} else {
 			(*nd)->secret->md.io_model_committed = PR_TRUE;
 			(*nd)->secret->md.accepted_socket = PR_TRUE;
 			memcpy(&(*nd)->secret->md.peer_addr, *raddr,
 				PR_NETADDR_SIZE(*raddr));
 #ifdef _PR_INET6
 			if (AF_INET6 == *raddr->raw.family)
         		*raddr->raw.family = PR_AF_INET6;
 #endif
 #ifdef _PR_NEED_SECRET_AF
 			(*nd)->secret->af = sd->secret->af;
 #endif
 		}
 	}
 	return rv;
 }
 PR_IMPLEMENT(PRInt32) PR_NTFast_AcceptRead_WithTimeoutCallback(
 PRFileDesc *sd, PRFileDesc **nd,
 PRNetAddr **raddr, void *buf, PRInt32 amount,
 PRIntervalTime timeout,
 _PR_AcceptTimeoutCallback callback,
 void *callbackArg)
 {
 	PRInt32 rv;
 	PROsfd newSock;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	PRNetAddr *raddrCopy;
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
 	*nd = NULL;
 	if (raddr == NULL) {
 		raddr = &raddrCopy;
 	}
 	rv = _PR_MD_FAST_ACCEPT_READ(sd, &newSock, raddr, buf, amount,
 	    timeout, PR_TRUE, callback, callbackArg);
 	if (rv < 0) {
 		rv = -1;
 	} else {
 		/* Successfully accepted and read; create the new PRFileDesc */
 		*nd = PR_AllocFileDesc(newSock, PR_GetTCPMethods());
 		if (*nd == 0) {
 			_PR_MD_CLOSE_SOCKET(newSock);
 			/* PR_AllocFileDesc() has invoked PR_SetError(). */
 			rv = -1;
 		} else {
 			(*nd)->secret->md.io_model_committed = PR_TRUE;
 			(*nd)->secret->md.accepted_socket = PR_TRUE;
 			memcpy(&(*nd)->secret->md.peer_addr, *raddr,
 				PR_NETADDR_SIZE(*raddr));
 #ifdef _PR_INET6
 			if (AF_INET6 == *raddr->raw.family)
         		*raddr->raw.family = PR_AF_INET6;
 #endif
 #ifdef _PR_NEED_SECRET_AF
 			(*nd)->secret->af = sd->secret->af;
 #endif
 		}
 	}
 	return rv;
 }
 #endif /* WINNT */
 #ifdef WINNT
 PR_IMPLEMENT(void)
 PR_NTFast_UpdateAcceptContext(PRFileDesc *socket, PRFileDesc *acceptSocket)
 {
 	_PR_MD_UPDATE_ACCEPT_CONTEXT(
 		socket->secret->md.osfd, acceptSocket->secret->md.osfd);
 }
 #endif /* WINNT */
 static PRInt32 PR_CALLBACK SocketSendFile(
     PRFileDesc *sd, PRSendFileData *sfd,
     PRTransmitFileFlags flags, PRIntervalTime timeout)
 {
 	PRInt32 rv;
 	PRThread *me = _PR_MD_CURRENT_THREAD();
 	if (_PR_PENDING_INTERRUPT(me)) {
 		me->flags &= ~_PR_INTERRUPT;
 		PR_SetError(PR_PENDING_INTERRUPT_ERROR, 0);
 		return -1;
 	}
 	if (_PR_IO_PENDING(me)) {
 		PR_SetError(PR_IO_PENDING_ERROR, 0);
 		return -1;
 	}
 	/* The socket must be in blocking mode. */
 	if (sd->secret->nonblocking) {
 		PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
 		return -1;
 	}
 #if defined(WINNT)
 	rv = _PR_MD_SENDFILE(sd, sfd, flags, timeout);
 	if ((rv >= 0) && (flags == PR_TRANSMITFILE_CLOSE_SOCKET)) {
 		/*
 		 * This should be kept the same as SocketClose, except
 		 * that _PR_MD_CLOSE_SOCKET(sd->secret->md.osfd) should
 		 * not be called because the socket will be recycled.
 		 */
 		PR_FreeFileDesc(sd);
 	}
 #else
 	rv = PR_EmulateSendFile(sd, sfd, flags, timeout);
 #endif	/* WINNT */
 	return rv;
 }
 static PRInt32 PR_CALLBACK SocketTransmitFile(PRFileDesc *sd, PRFileDesc *fd,
 const void *headers, PRInt32 hlen, PRTransmitFileFlags flags,
 PRIntervalTime timeout)
 {
 	PRSendFileData sfd;
 	sfd.fd = fd;
 	sfd.file_offset = 0;
 	sfd.file_nbytes = 0;
 	sfd.header = headers;
 	sfd.hlen = hlen;
 	sfd.trailer = NULL;
 	sfd.tlen = 0;
 	return(SocketSendFile(sd, &sfd, flags, timeout));
 }
 static PRStatus PR_CALLBACK SocketGetName(PRFileDesc *fd, PRNetAddr *addr)
 {
 	PRInt32 result;
 	PRUint32 addrlen;
 	addrlen = sizeof(PRNetAddr);
 	result = _PR_MD_GETSOCKNAME(fd, addr, &addrlen);
 	if (result < 0) {
 		return PR_FAILURE;
 	}
 #ifdef _PR_INET6
 	if (AF_INET6 == addr->raw.family)
         addr->raw.family = PR_AF_INET6;
 #endif
 	PR_ASSERT(IsValidNetAddr(addr) == PR_TRUE);
 	PR_ASSERT(IsValidNetAddrLen(addr, addrlen) == PR_TRUE);
 	return PR_SUCCESS;
 }
 static PRStatus PR_CALLBACK SocketGetPeerName(PRFileDesc *fd, PRNetAddr *addr)
 {
 	PRInt32 result;
 	PRUint32 addrlen;
 	addrlen = sizeof(PRNetAddr);
 	result = _PR_MD_GETPEERNAME(fd, addr, &addrlen);
 	if (result < 0) {
 		return PR_FAILURE;
 	}
 #ifdef _PR_INET6
 	if (AF_INET6 == addr->raw.family)
         addr->raw.family = PR_AF_INET6;
 #endif
 	PR_ASSERT(IsValidNetAddr(addr) == PR_TRUE);
 	PR_ASSERT(IsValidNetAddrLen(addr, addrlen) == PR_TRUE);
 	return PR_SUCCESS;
 }
 static PRInt16 PR_CALLBACK SocketPoll(
     PRFileDesc *fd, PRInt16 in_flags, PRInt16 *out_flags)
 {
     *out_flags = 0;
     return in_flags;
 }  /* SocketPoll */
 static PRIOMethods tcpMethods = {
 	PR_DESC_SOCKET_TCP,
 	SocketClose,
 	SocketRead,
 	SocketWrite,
 	SocketAvailable,
 	SocketAvailable64,
 	SocketSync,
 	(PRSeekFN)_PR_InvalidInt,
 	(PRSeek64FN)_PR_InvalidInt64,
 	(PRFileInfoFN)_PR_InvalidStatus,
 	(PRFileInfo64FN)_PR_InvalidStatus,
 	SocketWritev,
 	SocketConnect,
 	SocketAccept,
 	SocketBind,
 	SocketListen,
 	SocketShutdown,
 	SocketRecv,
 	SocketSend,
 	(PRRecvfromFN)_PR_InvalidInt,
 	(PRSendtoFN)_PR_InvalidInt,
 	SocketPoll,
 	SocketAcceptRead,
 	SocketTransmitFile,
 	SocketGetName,
 	SocketGetPeerName,
 	(PRReservedFN)_PR_InvalidInt,
 	(PRReservedFN)_PR_InvalidInt,
 	_PR_SocketGetSocketOption,
 	_PR_SocketSetSocketOption,
     SocketSendFile,
     SocketConnectContinue,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt
 };
 static PRIOMethods udpMethods = {
 	PR_DESC_SOCKET_UDP,
 	SocketClose,
 	SocketRead,
 	SocketWrite,
 	SocketAvailable,
 	SocketAvailable64,
 	SocketSync,
 	(PRSeekFN)_PR_InvalidInt,
 	(PRSeek64FN)_PR_InvalidInt64,
 	(PRFileInfoFN)_PR_InvalidStatus,
 	(PRFileInfo64FN)_PR_InvalidStatus,
 	SocketWritev,
 	SocketConnect,
 	(PRAcceptFN)_PR_InvalidDesc,
 	SocketBind,
 	SocketListen,
 	SocketShutdown,
 	SocketRecv,
 	SocketSend,
 	SocketRecvFrom,
 	SocketSendTo,
 	SocketPoll,
 	(PRAcceptreadFN)_PR_InvalidInt,
 	(PRTransmitfileFN)_PR_InvalidInt,
 	SocketGetName,
 	SocketGetPeerName,
 	(PRReservedFN)_PR_InvalidInt,
 	(PRReservedFN)_PR_InvalidInt,
 	_PR_SocketGetSocketOption,
 	_PR_SocketSetSocketOption,
     (PRSendfileFN)_PR_InvalidInt,
     (PRConnectcontinueFN)_PR_InvalidStatus,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt
 };
 static PRIOMethods socketpollfdMethods = {
     (PRDescType) 0,
     (PRCloseFN)_PR_InvalidStatus,
     (PRReadFN)_PR_InvalidInt,
     (PRWriteFN)_PR_InvalidInt,
     (PRAvailableFN)_PR_InvalidInt,
     (PRAvailable64FN)_PR_InvalidInt64,
     (PRFsyncFN)_PR_InvalidStatus,
     (PRSeekFN)_PR_InvalidInt,
     (PRSeek64FN)_PR_InvalidInt64,
     (PRFileInfoFN)_PR_InvalidStatus,
     (PRFileInfo64FN)_PR_InvalidStatus,
     (PRWritevFN)_PR_InvalidInt,
     (PRConnectFN)_PR_InvalidStatus,
     (PRAcceptFN)_PR_InvalidDesc,
     (PRBindFN)_PR_InvalidStatus,
     (PRListenFN)_PR_InvalidStatus,
     (PRShutdownFN)_PR_InvalidStatus,
     (PRRecvFN)_PR_InvalidInt,
     (PRSendFN)_PR_InvalidInt,
     (PRRecvfromFN)_PR_InvalidInt,
     (PRSendtoFN)_PR_InvalidInt,
 	SocketPoll,
     (PRAcceptreadFN)_PR_InvalidInt,
     (PRTransmitfileFN)_PR_InvalidInt,
     (PRGetsocknameFN)_PR_InvalidStatus,
     (PRGetpeernameFN)_PR_InvalidStatus,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt,
     (PRGetsocketoptionFN)_PR_InvalidStatus,
     (PRSetsocketoptionFN)_PR_InvalidStatus,
     (PRSendfileFN)_PR_InvalidInt,
     (PRConnectcontinueFN)_PR_InvalidStatus,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt,
     (PRReservedFN)_PR_InvalidInt
 };
 PR_IMPLEMENT(const PRIOMethods*) PR_GetTCPMethods()
 {
 	return &tcpMethods;
 }
 PR_IMPLEMENT(const PRIOMethods*) PR_GetUDPMethods()
 {
 	return &udpMethods;
 }
 static const PRIOMethods* PR_GetSocketPollFdMethods()
 {
     return &socketpollfdMethods;
 }  /* PR_GetSocketPollFdMethods */
 #if !defined(_PR_INET6) || defined(_PR_INET6_PROBE)
 PR_EXTERN(PRStatus) _pr_push_ipv6toipv4_layer(PRFileDesc *fd);
 #if defined(_PR_INET6_PROBE)
 extern PRBool _pr_ipv6_is_present(void);
 PR_IMPLEMENT(PRBool) _pr_test_ipv6_socket()
 {
 	PROsfd osfd;
 	osfd = _PR_MD_SOCKET(AF_INET6, SOCK_STREAM, 0);
 	if (osfd != -1) {
 		_PR_MD_CLOSE_SOCKET(osfd);
 		return PR_TRUE;
 	}
 	return PR_FALSE;
 }
 #endif	/* _PR_INET6_PROBE */
 #endif
 PR_IMPLEMENT(PRFileDesc*) PR_Socket(PRInt32 domain, PRInt32 type, PRInt32 proto)
 {
 	PROsfd osfd;
 	PRFileDesc *fd;
 	PRInt32 tmp_domain = domain;
 	if (!_pr_initialized) _PR_ImplicitInitialization();
 	if (PR_AF_INET != domain
 			&& PR_AF_INET6 != domain
 #if defined(XP_UNIX) || defined(XP_OS2)
 			&& PR_AF_LOCAL != domain
 #endif
 			) {
 		PR_SetError(PR_ADDRESS_NOT_SUPPORTED_ERROR, 0);
 		return NULL;
 	}
 #if defined(_PR_INET6_PROBE)
 	if (PR_AF_INET6 == domain)
 		domain = _pr_ipv6_is_present() ? AF_INET6 : AF_INET;
 #elif defined(_PR_INET6)
 	if (PR_AF_INET6 == domain)
 		domain = AF_INET6;
 #else
 	if (PR_AF_INET6 == domain)
 		domain = AF_INET;
 #endif	/* _PR_INET6 */
 	osfd = _PR_MD_SOCKET(domain, type, proto);
 	if (osfd == -1) {
 		return 0;
 	}
 	if (type == SOCK_STREAM)
 		fd = PR_AllocFileDesc(osfd, PR_GetTCPMethods());
 	else
 		fd = PR_AllocFileDesc(osfd, PR_GetUDPMethods());
 	/*
 	 * Make the sockets non-blocking
 	 */
 	if (fd != NULL) {
 		_PR_MD_MAKE_NONBLOCK(fd);
 		_PR_MD_INIT_FD_INHERITABLE(fd, PR_FALSE);
 #ifdef _PR_NEED_SECRET_AF
 		fd->secret->af = domain;
 #endif
 #if defined(_PR_INET6_PROBE) || !defined(_PR_INET6)
 		/*
 		 * For platforms with no support for IPv6
 		 * create layered socket for IPv4-mapped IPv6 addresses
 		 */
 		if (PR_AF_INET6 == tmp_domain && PR_AF_INET == domain) {
 			if (PR_FAILURE == _pr_push_ipv6toipv4_layer(fd)) {
 				PR_Close(fd);
 				fd = NULL;
 			}
 		}
 #endif
 	} else
 		_PR_MD_CLOSE_SOCKET(osfd);
 	return fd;
 }
 PR_IMPLEMENT(PRFileDesc *) PR_NewTCPSocket(void)
 {
 	PRInt32 domain = AF_INET;
 	return PR_Socket(domain, SOCK_STREAM, 0);
 }
 PR_IMPLEMENT(PRFileDesc*) PR_NewUDPSocket(void)
 {
 	PRInt32 domain = AF_INET;
 	return PR_Socket(domain, SOCK_DGRAM, 0);
 }
 PR_IMPLEMENT(PRFileDesc *) PR_OpenTCPSocket(PRIntn af)
 {
 	return PR_Socket(af, SOCK_STREAM, 0);
 }
 PR_IMPLEMENT(PRFileDesc*) PR_OpenUDPSocket(PRIntn af)
 {
 	return PR_Socket(af, SOCK_DGRAM, 0);
 }
 PR_IMPLEMENT(PRStatus) PR_NewTCPSocketPair(PRFileDesc *f[])
 {
 #ifdef XP_UNIX
 	PRInt32 rv, osfd[2];
 	if (!_pr_initialized) _PR_ImplicitInitialization();
 	rv = _PR_MD_SOCKETPAIR(AF_UNIX, SOCK_STREAM, 0, osfd);
 	if (rv == -1) {
 		return PR_FAILURE;
 	}
 	f[0] = PR_AllocFileDesc(osfd[0], PR_GetTCPMethods());
 	if (!f[0]) {
 		_PR_MD_CLOSE_SOCKET(osfd[0]);
 		_PR_MD_CLOSE_SOCKET(osfd[1]);
 		/* PR_AllocFileDesc() has invoked PR_SetError(). */
 		return PR_FAILURE;
 	}
 	f[1] = PR_AllocFileDesc(osfd[1], PR_GetTCPMethods());
 	if (!f[1]) {
 		PR_Close(f[0]);
 		_PR_MD_CLOSE_SOCKET(osfd[1]);
 		/* PR_AllocFileDesc() has invoked PR_SetError(). */
 		return PR_FAILURE;
 	}
 	_PR_MD_MAKE_NONBLOCK(f[0]);
 	_PR_MD_INIT_FD_INHERITABLE(f[0], PR_FALSE);
 	_PR_MD_MAKE_NONBLOCK(f[1]);
 	_PR_MD_INIT_FD_INHERITABLE(f[1], PR_FALSE);
 	return PR_SUCCESS;
 #elif defined(WINNT)
     /*
      * A socket pair is often used for interprocess communication,
      * so we need to make sure neither socket is associated with
      * the I/O completion port; otherwise it can't be used by a
      * child process.
      *
      * The default implementation below cannot be used for NT
      * because PR_Accept would have associated the I/O completion
      * port with the listening and accepted sockets.
      */
     SOCKET listenSock;
     SOCKET osfd[2];
     struct sockaddr_in selfAddr, peerAddr;
     int addrLen;
     if (!_pr_initialized) _PR_ImplicitInitialization();
     osfd[0] = osfd[1] = INVALID_SOCKET;
     listenSock = socket(AF_INET, SOCK_STREAM, 0);
     if (listenSock == INVALID_SOCKET) {
         goto failed;
     }
     selfAddr.sin_family = AF_INET;
     selfAddr.sin_port = 0;
     selfAddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); /* BugZilla: 35408 */
     addrLen = sizeof(selfAddr);
     if (bind(listenSock, (struct sockaddr *) &selfAddr,
             addrLen) == SOCKET_ERROR) {
         goto failed;
     }
     if (getsockname(listenSock, (struct sockaddr *) &selfAddr,
             &addrLen) == SOCKET_ERROR) {
         goto failed;
     }
     if (listen(listenSock, 5) == SOCKET_ERROR) {
         goto failed;
     }
     osfd[0] = socket(AF_INET, SOCK_STREAM, 0);
     if (osfd[0] == INVALID_SOCKET) {
         goto failed;
     }
     selfAddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
     /*
      * Only a thread is used to do the connect and accept.
      * I am relying on the fact that connect returns
      * successfully as soon as the connect request is put
      * into the listen queue (but before accept is called).
      * This is the behavior of the BSD socket code.  If
      * connect does not return until accept is called, we
      * will need to create another thread to call connect.
      */
     if (connect(osfd[0], (struct sockaddr *) &selfAddr,
             addrLen) == SOCKET_ERROR) {
         goto failed;
     }
     /*
      * A malicious local process may connect to the listening
      * socket, so we need to verify that the accepted connection
      * is made from our own socket osfd[0].
      */
     if (getsockname(osfd[0], (struct sockaddr *) &selfAddr,
             &addrLen) == SOCKET_ERROR) {
         goto failed;
     }
     osfd[1] = accept(listenSock, (struct sockaddr *) &peerAddr, &addrLen);
     if (osfd[1] == INVALID_SOCKET) {
         goto failed;
     }
     if (peerAddr.sin_port != selfAddr.sin_port) {
         /* the connection we accepted is not from osfd[0] */
         PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
         goto failed;
     }
     closesocket(listenSock);
     f[0] = PR_AllocFileDesc(osfd[0], PR_GetTCPMethods());
     if (!f[0]) {
         closesocket(osfd[0]);
         closesocket(osfd[1]);
         /* PR_AllocFileDesc() has invoked PR_SetError(). */
         return PR_FAILURE;
     }
     f[1] = PR_AllocFileDesc(osfd[1], PR_GetTCPMethods());
     if (!f[1]) {
         PR_Close(f[0]);
         closesocket(osfd[1]);
         /* PR_AllocFileDesc() has invoked PR_SetError(). */
         return PR_FAILURE;
     }
     _PR_MD_INIT_FD_INHERITABLE(f[0], PR_FALSE);
     _PR_MD_INIT_FD_INHERITABLE(f[1], PR_FALSE);
     return PR_SUCCESS;
 failed:
     if (listenSock != INVALID_SOCKET) {
         closesocket(listenSock);
     }
     if (osfd[0] != INVALID_SOCKET) {
         closesocket(osfd[0]);
     }
     if (osfd[1] != INVALID_SOCKET) {
         closesocket(osfd[1]);
     }
     return PR_FAILURE;
 #else /* not Unix or NT */
     /*
      * default implementation
      */
     PRFileDesc *listenSock;
     PRNetAddr selfAddr, peerAddr;
     PRUint16 port;
     f[0] = f[1] = NULL;
     listenSock = PR_NewTCPSocket();
     if (listenSock == NULL) {
         goto failed;
     }
     PR_InitializeNetAddr(PR_IpAddrLoopback, 0, &selfAddr); /* BugZilla: 35408 */
     if (PR_Bind(listenSock, &selfAddr) == PR_FAILURE) {
         goto failed;
     }
     if (PR_GetSockName(listenSock, &selfAddr) == PR_FAILURE) {
         goto failed;
     }
     port = ntohs(selfAddr.inet.port);
     if (PR_Listen(listenSock, 5) == PR_FAILURE) {
         goto failed;
     }
     f[0] = PR_NewTCPSocket();
     if (f[0] == NULL) {
         goto failed;
     }
 #ifdef _PR_CONNECT_DOES_NOT_BIND
     /*
      * If connect does not implicitly bind the socket (e.g., on
      * BeOS), we have to bind the socket so that we can get its
      * port with getsockname later.
      */
     PR_InitializeNetAddr(PR_IpAddrLoopback, 0, &selfAddr);
     if (PR_Bind(f[0], &selfAddr) == PR_FAILURE) {
         goto failed;
     }
 #endif
     PR_InitializeNetAddr(PR_IpAddrLoopback, port, &selfAddr);
     /*
      * Only a thread is used to do the connect and accept.
      * I am relying on the fact that PR_Connect returns
      * successfully as soon as the connect request is put
      * into the listen queue (but before PR_Accept is called).
      * This is the behavior of the BSD socket code.  If
      * connect does not return until accept is called, we
      * will need to create another thread to call connect.
      */
     if (PR_Connect(f[0], &selfAddr, PR_INTERVAL_NO_TIMEOUT)
             == PR_FAILURE) {
         goto failed;
     }
     /*
      * A malicious local process may connect to the listening
      * socket, so we need to verify that the accepted connection
      * is made from our own socket f[0].
      */
     if (PR_GetSockName(f[0], &selfAddr) == PR_FAILURE) {
         goto failed;
     }
     f[1] = PR_Accept(listenSock, &peerAddr, PR_INTERVAL_NO_TIMEOUT);
     if (f[1] == NULL) {
         goto failed;
     }
     if (peerAddr.inet.port != selfAddr.inet.port) {
         /* the connection we accepted is not from f[0] */
         PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
         goto failed;
     }
     PR_Close(listenSock);
     return PR_SUCCESS;
 failed:
     if (listenSock) {
         PR_Close(listenSock);
     }
     if (f[0]) {
         PR_Close(f[0]);
     }
     if (f[1]) {
         PR_Close(f[1]);
     }
     return PR_FAILURE;
 #endif
 }
 PR_IMPLEMENT(PROsfd)
 PR_FileDesc2NativeHandle(PRFileDesc *fd)
 {
     if (fd) {
         fd = PR_GetIdentitiesLayer(fd, PR_NSPR_IO_LAYER);
     }
     if (!fd) {
         PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
         return -1;
     }
     return fd->secret->md.osfd;
 }
 PR_IMPLEMENT(void)
 PR_ChangeFileDescNativeHandle(PRFileDesc *fd, PROsfd handle)
 {
 	if (fd)
 		fd->secret->md.osfd = handle;
 }
 /*
 ** Select compatibility
 **
 */
 PR_IMPLEMENT(void) PR_FD_ZERO(PR_fd_set *set)
 {
 	memset(set, 0, sizeof(PR_fd_set));
 }
 PR_IMPLEMENT(void) PR_FD_SET(PRFileDesc *fh, PR_fd_set *set)
 {
 	PR_ASSERT( set->hsize < PR_MAX_SELECT_DESC );
 	set->harray[set->hsize++] = fh;
 }
 PR_IMPLEMENT(void) PR_FD_CLR(PRFileDesc *fh, PR_fd_set *set)
 {
 	PRUint32 index, index2;
 	for (index = 0; index<set->hsize; index++)
 		if (set->harray[index] == fh) {
 			for (index2=index; index2 < (set->hsize-1); index2++) {
 				set->harray[index2] = set->harray[index2+1];
 			}
 			set->hsize--;
 			break;
 		}
 }
 PR_IMPLEMENT(PRInt32) PR_FD_ISSET(PRFileDesc *fh, PR_fd_set *set)
 {
 	PRUint32 index;
 	for (index = 0; index<set->hsize; index++)
 		if (set->harray[index] == fh) {
 			return 1;
 		}
 	return 0;
 }
 PR_IMPLEMENT(void) PR_FD_NSET(PROsfd fd, PR_fd_set *set)
 {
 	PR_ASSERT( set->nsize < PR_MAX_SELECT_DESC );
 	set->narray[set->nsize++] = fd;
 }
 PR_IMPLEMENT(void) PR_FD_NCLR(PROsfd fd, PR_fd_set *set)
 {
 	PRUint32 index, index2;
 	for (index = 0; index<set->nsize; index++)
 		if (set->narray[index] == fd) {
 			for (index2=index; index2 < (set->nsize-1); index2++) {
 				set->narray[index2] = set->narray[index2+1];
 			}
 			set->nsize--;
 			break;
 		}
 }
 PR_IMPLEMENT(PRInt32) PR_FD_NISSET(PROsfd fd, PR_fd_set *set)
 {
 	PRUint32 index;
 	for (index = 0; index<set->nsize; index++)
 		if (set->narray[index] == fd) {
 			return 1;
 		}
 	return 0;
 }
 #if !defined(NEED_SELECT)
 #include "obsolete/probslet.h"
 #define PD_INCR 20
 static PRPollDesc *_pr_setfd(
     PR_fd_set *set, PRInt16 flags, PRPollDesc *polldesc)
 {
     PRUintn fsidx, pdidx;
     PRPollDesc *poll = polldesc;
     if (NULL == set) return poll;
 	/* First set the pr file handle osfds */
 	for (fsidx = 0; fsidx < set->hsize; fsidx++)
 	{
 	    for (pdidx = 0; 1; pdidx++)
         {
             if ((PRFileDesc*)-1 == poll[pdidx].fd)
             {
                 /* our vector is full - extend and condition it */
                 poll = (PRPollDesc*)PR_Realloc(
                     poll, (pdidx + 1 + PD_INCR) * sizeof(PRPollDesc));
                 if (NULL == poll) goto out_of_memory;
                 memset(
                     poll + pdidx * sizeof(PRPollDesc),
 , PD_INCR * sizeof(PRPollDesc));
                 poll[pdidx + PD_INCR].fd = (PRFileDesc*)-1;
             }
             if ((NULL == poll[pdidx].fd)
             || (poll[pdidx].fd == set->harray[fsidx]))
             {
                 /* PR_ASSERT(0 == (poll[pdidx].in_flags & flags)); */
                 /* either empty or prevously defined */
                 poll[pdidx].fd = set->harray[fsidx];  /* possibly redundant */
                 poll[pdidx].in_flags |= flags;  /* possibly redundant */
                 break;
             }
         }
 	}
 #if 0
 	/* Second set the native osfds */
 	for (fsidx = 0; fsidx < set->nsize; fsidx++)
 	{
 	    for (pdidx = 0; ((PRFileDesc*)-1 != poll[pdidx].fd); pdidx++)
         {
             if ((PRFileDesc*)-1 == poll[pdidx].fd)
             {
                 /* our vector is full - extend and condition it */
                 poll = PR_Realloc(
                     poll, (pdidx + PD_INCR) * sizeof(PRPollDesc));
                 if (NULL == poll) goto out_of_memory;
                 memset(
                     poll + pdidx * sizeof(PRPollDesc),
 , PD_INCR * sizeof(PRPollDesc));
                 poll[(pdidx + PD_INCR)].fd = (PRFileDesc*)-1;
             }
             if ((NULL == poll[pdidx].fd)
             || (poll[pdidx].fd == set->narray[fsidx]))
             {
                 /* either empty or prevously defined */
                 poll[pdidx].fd = set->narray[fsidx];
                 PR_ASSERT(0 == (poll[pdidx].in_flags & flags));
                 poll[pdidx].in_flags |= flags;
                 break;
             }
         }
 	}
 #endif /* 0 */
 	return poll;
 out_of_memory:
     if (NULL != polldesc) PR_DELETE(polldesc);
     return NULL;
 }  /* _pr_setfd */
 #endif /* !defined(NEED_SELECT) */
 PR_IMPLEMENT(PRInt32) PR_Select(
     PRInt32 unused, PR_fd_set *pr_rd, PR_fd_set *pr_wr,
     PR_fd_set *pr_ex, PRIntervalTime timeout)
 {
 #if !defined(NEED_SELECT)
     PRInt32 npds = 0;
     /*
     ** Find out how many fds are represented in the three lists.
     ** Then allocate a polling descriptor for the logical union
     ** (there can't be any overlapping) and call PR_Poll().
     */
     PRPollDesc *copy, *poll;
     static PRBool warning = PR_TRUE;
     if (warning) warning = _PR_Obsolete( "PR_Select()", "PR_Poll()");
     /* try to get an initial guesss at how much space we need */
     npds = 0;
     if ((NULL != pr_rd) && ((pr_rd->hsize + pr_rd->nsize - npds) > 0))
         npds = pr_rd->hsize + pr_rd->nsize;
     if ((NULL != pr_wr) && ((pr_wr->hsize + pr_wr->nsize - npds) > 0))
         npds = pr_wr->hsize + pr_wr->nsize;
     if ((NULL != pr_ex) && ((pr_ex->hsize + pr_ex->nsize - npds) > 0))
         npds = pr_ex->hsize + pr_ex->nsize;
     if (0 == npds)
     {
         PR_Sleep(timeout);
         return 0;
     }
     copy = poll = (PRPollDesc*)PR_Calloc(npds + PD_INCR, sizeof(PRPollDesc));
     if (NULL == poll) goto out_of_memory;
     poll[npds + PD_INCR - 1].fd = (PRFileDesc*)-1;
     poll = _pr_setfd(pr_rd, PR_POLL_READ, poll);
     if (NULL == poll) goto out_of_memory;
     poll = _pr_setfd(pr_wr, PR_POLL_WRITE, poll);
     if (NULL == poll) goto out_of_memory;
     poll = _pr_setfd(pr_ex, PR_POLL_EXCEPT, poll);
     if (NULL == poll) goto out_of_memory;
     unused = 0;
     while (NULL != poll[unused].fd && (PRFileDesc*)-1 != poll[unused].fd)
     {
         ++unused;
     }
     PR_ASSERT(unused > 0);
     npds = PR_Poll(poll, unused, timeout);
     if (npds > 0)
     {
         /* Copy the results back into the fd sets */
         if (NULL != pr_rd) pr_rd->nsize = pr_rd->hsize = 0;
         if (NULL != pr_wr) pr_wr->nsize = pr_wr->hsize = 0;
         if (NULL != pr_ex) pr_ex->nsize = pr_ex->hsize = 0;
         for (copy = &poll[unused - 1]; copy >= poll; --copy)
         {
             if (copy->out_flags & PR_POLL_NVAL)
             {
                 PR_SetError(PR_BAD_DESCRIPTOR_ERROR, 0);
                 npds = -1;
                 break;
             }
             if (copy->out_flags & PR_POLL_READ)
                 if (NULL != pr_rd) pr_rd->harray[pr_rd->hsize++] = copy->fd;
             if (copy->out_flags & PR_POLL_WRITE)
                 if (NULL != pr_wr) pr_wr->harray[pr_wr->hsize++] = copy->fd;
             if (copy->out_flags & PR_POLL_EXCEPT)
                 if (NULL != pr_ex) pr_ex->harray[pr_ex->hsize++] = copy->fd;
         }
     }
     PR_DELETE(poll);
     return npds;
 out_of_memory:
     PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
     return -1;
 #endif /* !defined(NEED_SELECT) */
 }

The Tor Browser / annotate

nsprpub/pr/src/io/prsocket.c@ca08bd8f51b2 (annotated)

nsprpub/pr/src/io/prsocket.c