/** @file * IPRT - Network Sockets. */ /* * Copyright (C) 2006-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ #ifndef IPRT_INCLUDED_socket_h #define IPRT_INCLUDED_socket_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include #include #include #include #include #ifdef IN_RING0 # error "There are no RTSocket APIs available Ring-0 Host Context!" #endif RT_C_DECLS_BEGIN /** @defgroup grp_rt_socket RTSocket - Network Sockets * @ingroup grp_rt * @{ */ /** Use the system default timeout for the connet attempt. */ #define RT_SOCKETCONNECT_DEFAULT_WAIT (RT_INDEFINITE_WAIT - 1) /** * Retains a reference to the socket handle. * * @returns New reference count, UINT32_MAX on invalid handle (asserted). * * @param hSocket The socket handle. */ RTDECL(uint32_t) RTSocketRetain(RTSOCKET hSocket); /** * Release a reference to the socket handle. * * When the reference count reaches zero, the socket handle is shut down and * destroyed. This will not be graceful shutdown, use the protocol specific * close method if this is desired. * * @returns New reference count, UINT32_MAX on invalid handle (asserted). * * @param hSocket The socket handle. The NIL handle is quietly * ignored and 0 is returned. */ RTDECL(uint32_t) RTSocketRelease(RTSOCKET hSocket); /** * Shuts down the socket, close it and then release one handle reference. * * This is slightly different from RTSocketRelease which will first do the * shutting down and closing when the reference count reaches zero. * * @returns IPRT status code. * @param hSocket The socket handle. NIL is ignored. * * @remarks This will not perform a graceful shutdown of the socket, it will * just destroy it. Use the protocol specific close method if this is * desired. */ RTDECL(int) RTSocketClose(RTSOCKET hSocket); /** * Creates an IPRT socket handle from a native one. * * Do NOT use the native handle after passing it to this function, IPRT owns it * and might even have closed upon a successful return. * * @returns IPRT status code. * @param phSocket Where to store the IPRT socket handle. * @param uNative The native handle. */ RTDECL(int) RTSocketFromNative(PRTSOCKET phSocket, RTHCINTPTR uNative); /** * Gets the native socket handle. * * @returns The native socket handle or RTHCUINTPTR_MAX if not invalid. * @param hSocket The socket handle. */ RTDECL(RTHCUINTPTR) RTSocketToNative(RTSOCKET hSocket); /** * Helper that ensures the correct inheritability of a socket. * * We're currently ignoring failures. * * @returns IPRT status code * @param hSocket The socket handle. * @param fInheritable The desired inheritability state. */ RTDECL(int) RTSocketSetInheritance(RTSOCKET hSocket, bool fInheritable); /** * Parse Internet style addresses, getting a generic IPRT network address. * * @returns IPRT status code * @param pszAddress Name or IP address. NULL or empty string (no * spaces) is taken to mean INADDR_ANY, which is * meaningful when binding a server socket for * instance. * @param uPort Port number (host byte order). * @param pAddr Where to return the generic IPRT network address. */ RTDECL(int) RTSocketParseInetAddress(const char *pszAddress, unsigned uPort, PRTNETADDR pAddr); /** * Try resolve a host name, returning the first matching address. * * @returns IPRT status code. * @param pszHost Name or IP address to look up. * @param pszAddress Where to return the stringified address. * @param pcbAddress Input: The size of the @a pszResult buffer. * Output: size of the returned string. This is set on * VERR_BUFFER_OVERFLOW and most other error statuses. * @param penmAddrType Input: Which kind of address to return. Valid values * are: * - RTNETADDRTYPE_IPV4 -> lookup AF_INET. * - RTNETADDRTYPE_IPV6 -> lookup AF_INET6. * - RTNETADDRTYPE_INVALID/NULL -> lookup anything. * Output: The type of address that is being returned. * Not modified on failure. */ RTDECL(int) RTSocketQueryAddressStr(const char *pszHost, char *pszAddress, size_t *pcbAddress, PRTNETADDRTYPE penmAddrType); /** * Receive data from a socket. * * @returns IPRT status code. * @param hSocket The socket handle. * @param pvBuffer Where to put the data we read. * @param cbBuffer Read buffer size. * @param pcbRead Number of bytes read. If NULL the entire buffer * will be filled upon successful return. If not NULL a * partial read can be done successfully. */ RTDECL(int) RTSocketRead(RTSOCKET hSocket, void *pvBuffer, size_t cbBuffer, size_t *pcbRead); /** * Receive data from a socket, including sender address. Mainly useful * for datagram sockets. * * @returns IPRT status code. * @param hSocket The socket handle. * @param pvBuffer Where to put the data we read. * @param cbBuffer Read buffer size. * @param pcbRead Number of bytes read. Must be non-NULL. * @param pSrcAddr Pointer to sender address buffer. May be NULL. */ RTDECL(int) RTSocketReadFrom(RTSOCKET hSocket, void *pvBuffer, size_t cbBuffer, size_t *pcbRead, PRTNETADDR pSrcAddr); /** * Send data to a socket. * * @returns IPRT status code. * @retval VERR_INTERRUPTED if interrupted before anything was written. * * @param hSocket The socket handle. * @param pvBuffer Buffer to write data to socket. * @param cbBuffer How much to write. */ RTDECL(int) RTSocketWrite(RTSOCKET hSocket, const void *pvBuffer, size_t cbBuffer); /** * Send data to a socket, including destination address. Mainly useful * for datagram sockets. * * @returns IPRT status code. * @retval VERR_INTERRUPTED if interrupted before anything was written. * * @param hSocket The socket handle. * @param pvBuffer Buffer to write data to socket. * @param cbBuffer How much to write. * @param pDstAddr Pointer to destination address. May be NULL. */ RTDECL(int) RTSocketWriteTo(RTSOCKET hSocket, const void *pvBuffer, size_t cbBuffer, PCRTNETADDR pDstAddr); /** * Checks if the socket is ready for reading (for I/O multiplexing). * * @returns IPRT status code. * @param hSocket The socket handle. * @param cMillies Number of milliseconds to wait for the socket. Use * RT_INDEFINITE_WAIT to wait for ever. */ RTDECL(int) RTSocketSelectOne(RTSOCKET hSocket, RTMSINTERVAL cMillies); /** @name Select events * @{ */ /** Readable without blocking. */ #define RTSOCKET_EVT_READ RT_BIT_32(0) /** Writable without blocking. */ #define RTSOCKET_EVT_WRITE RT_BIT_32(1) /** Error condition, hangup, exception or similar. */ #define RTSOCKET_EVT_ERROR RT_BIT_32(2) /** Mask of the valid bits. */ #define RTSOCKET_EVT_VALID_MASK UINT32_C(0x00000007) /** @} */ /** * Socket I/O multiplexing * Checks if the socket is ready for one of the given events. * * @returns iprt status code. * @param hSocket The Socket handle. * @param fEvents Event mask to wait for. * @param pfEvents Where to store the event mask on return. * @param cMillies Number of milliseconds to wait for the socket. Use * RT_INDEFINITE_WAIT to wait for ever. */ RTR3DECL(int) RTSocketSelectOneEx(RTSOCKET hSocket, uint32_t fEvents, uint32_t *pfEvents, RTMSINTERVAL cMillies); /** * Shuts down one or both directions of communciation. * * @returns IPRT status code. * @param hSocket The socket handle. * @param fRead Whether to shutdown our read direction. * @param fWrite Whether to shutdown our write direction. */ RTDECL(int) RTSocketShutdown(RTSOCKET hSocket, bool fRead, bool fWrite); /** * Gets the address of the local side. * * @returns IPRT status code. * @param hSocket The Socket handle. * @param pAddr Where to store the local address on success. */ RTDECL(int) RTSocketGetLocalAddress(RTSOCKET hSocket, PRTNETADDR pAddr); /** * Gets the address of the other party. * * @returns IPRT status code. * @param hSocket The Socket handle. * @param pAddr Where to store the peer address on success. */ RTDECL(int) RTSocketGetPeerAddress(RTSOCKET hSocket, PRTNETADDR pAddr); /** * Send data from a scatter/gather buffer to a socket. * * @returns IPRT status code. * @retval VERR_INTERRUPTED if interrupted before anything was written. * * @param hSocket The socket handle. * @param pSgBuf Scatter/gather buffer to write data to socket. */ RTDECL(int) RTSocketSgWrite(RTSOCKET hSocket, PCRTSGBUF pSgBuf); /** * Send data from multiple buffers to a socket. * * This is convenience wrapper around the RTSocketSgWrite and RTSgBufInit calls * for lazy coders. The "L" in the function name is short for "list" just like * in the execl libc API. * * @returns IPRT status code. * @retval VERR_INTERRUPTED if interrupted before anything was written. * * @param hSocket The socket handle. * @param cSegs The number of data segments in the following * ellipsis. * @param ... Pairs of buffer pointers (void const *) and buffer * sizes (size_t). Make 101% sure the pointer is * really size_t. */ RTDECL(int) RTSocketSgWriteL(RTSOCKET hSocket, size_t cSegs, ...); /** * Send data from multiple buffers to a socket. * * This is convenience wrapper around the RTSocketSgWrite and RTSgBufInit calls * for lazy coders. The "L" in the function name is short for "list" just like * in the execl libc API. * * @returns IPRT status code. * @retval VERR_INTERRUPTED if interrupted before anything was written. * * @param hSocket The socket handle. * @param cSegs The number of data segments in the following * argument list. * @param va Pairs of buffer pointers (void const *) and buffer * sizes (size_t). Make 101% sure the pointer is * really size_t. */ RTDECL(int) RTSocketSgWriteLV(RTSOCKET hSocket, size_t cSegs, va_list va); /** * Receive data from a socket. * * This version doesn't block if there is no data on the socket. * * @returns IPRT status code. * * @param hSocket The socket handle. * @param pvBuffer Where to put the data we read. * @param cbBuffer Read buffer size. * @param pcbRead Number of bytes read. */ RTDECL(int) RTSocketReadNB(RTSOCKET hSocket, void *pvBuffer, size_t cbBuffer, size_t *pcbRead); /** * Send data to a socket. * * This version doesn't block if there is not enough room for the message. * * @returns IPRT status code. * * @param hSocket The socket handle. * @param pvBuffer Buffer to write data to socket. * @param cbBuffer How much to write. * @param pcbWritten Number of bytes written. */ RTDECL(int) RTSocketWriteNB(RTSOCKET hSocket, const void *pvBuffer, size_t cbBuffer, size_t *pcbWritten); /** * Send data to a socket, including destination address. Mainly useful * for datagram sockets. * * This version doesn't block if there is not enough room for the message. * * @returns IPRT status code. * @retval VERR_INTERRUPTED if interrupted before anything was written. * * @param hSocket The socket handle. * @param pvBuffer Buffer to write data to socket. * @param cbBuffer How much to write. * @param pDstAddr Pointer to destination address. May be NULL. */ RTDECL(int) RTSocketWriteToNB(RTSOCKET hSocket, const void *pvBuffer, size_t cbBuffer, PCRTNETADDR pDstAddr); /** * Send data from a scatter/gather buffer to a socket. * * This version doesn't block if there is not enough room for the message. * * @returns iprt status code. * * @param hSocket The Socket handle. * @param pSgBuf Scatter/gather buffer to write data to socket. * @param pcbWritten Number of bytes written. */ RTR3DECL(int) RTSocketSgWriteNB(RTSOCKET hSocket, PCRTSGBUF pSgBuf, size_t *pcbWritten); /** * Send data from multiple buffers to a socket. * * This version doesn't block if there is not enough room for the message. * This is convenience wrapper around the RTSocketSgWrite and RTSgBufInit calls * for lazy coders. The "L" in the function name is short for "list" just like * in the execl libc API. * * @returns IPRT status code. * * @param hSocket The socket handle. * @param cSegs The number of data segments in the following * ellipsis. * @param pcbWritten Number of bytes written. * @param ... Pairs of buffer pointers (void const *) and buffer * sizes (size_t). Make 101% sure the pointer is * really size_t. */ RTR3DECL(int) RTSocketSgWriteLNB(RTSOCKET hSocket, size_t cSegs, size_t *pcbWritten, ...); /** * Send data from multiple buffers to a socket. * * This version doesn't block if there is not enough room for the message. * This is convenience wrapper around the RTSocketSgWrite and RTSgBufInit calls * for lazy coders. The "L" in the function name is short for "list" just like * in the execl libc API. * * @returns IPRT status code. * * @param hSocket The socket handle. * @param cSegs The number of data segments in the following * argument list. * @param pcbWritten Number of bytes written. * @param va Pairs of buffer pointers (void const *) and buffer * sizes (size_t). Make 101% sure the pointer is * really size_t. */ RTR3DECL(int) RTSocketSgWriteLVNB(RTSOCKET hSocket, size_t cSegs, size_t *pcbWritten, va_list va); /** @} */ RT_C_DECLS_END #endif /* !IPRT_INCLUDED_socket_h */