BuffSock.cpp
上传用户:woshihumen
上传日期:2013-07-18
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文件大小:7k
- /*
- * XMail by Davide Libenzi ( Intranet and Internet mail server )
- * Copyright (C) 1999,..,2004 Davide Libenzi
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Davide Libenzi <davidel@xmailserver.org>
- *
- */
- #include "SysInclude.h"
- #include "SysDep.h"
- #include "SvrDefines.h"
- #include "StrUtils.h"
- #include "BuffSock.h"
- #define BSOCK_EOF INT_MIN
- struct BuffSocketData {
- SYS_SOCKET SockFD;
- int iBufferSize;
- char *pszBuffer;
- int iBytesInBuffer;
- int iReadIndex;
- };
- static int BSckFetchData(BuffSocketData * pBSD, int iTimeout);
- BSOCK_HANDLE BSckAttach(SYS_SOCKET SockFD, int iBufferSize)
- {
- BuffSocketData *pBSD = (BuffSocketData *) SysAlloc(sizeof(BuffSocketData));
- if (pBSD == NULL)
- return (INVALID_BSOCK_HANDLE);
- char *pszBuffer = (char *) SysAlloc(iBufferSize);
- if (pszBuffer == NULL) {
- SysFree(pBSD);
- return (INVALID_BSOCK_HANDLE);
- }
- pBSD->SockFD = SockFD;
- pBSD->iBufferSize = iBufferSize;
- pBSD->pszBuffer = pszBuffer;
- pBSD->iBytesInBuffer = 0;
- pBSD->iReadIndex = 0;
- return ((BSOCK_HANDLE) pBSD);
- }
- SYS_SOCKET BSckDetach(BSOCK_HANDLE hBSock, int iCloseSocket)
- {
- BuffSocketData *pBSD = (BuffSocketData *) hBSock;
- SYS_SOCKET SockFD = pBSD->SockFD;
- SysFree(pBSD->pszBuffer);
- SysFree(pBSD);
- if (iCloseSocket) {
- SysCloseSocket(SockFD);
- return (SYS_INVALID_SOCKET);
- }
- return (SockFD);
- }
- static int BSckFetchData(BuffSocketData * pBSD, int iTimeout)
- {
- int iReadedBytes;
- pBSD->iReadIndex = 0;
- if ((iReadedBytes = SysRecvData(pBSD->SockFD, pBSD->pszBuffer,
- pBSD->iBufferSize, iTimeout)) <= 0) {
- ErrSetErrorCode(ERR_SOCK_NOMORE_DATA);
- return (iReadedBytes);
- }
- pBSD->iBytesInBuffer = iReadedBytes;
- return (iReadedBytes);
- }
- int BSckGetChar(BSOCK_HANDLE hBSock, int iTimeout)
- {
- BuffSocketData *pBSD = (BuffSocketData *) hBSock;
- if ((pBSD->iBytesInBuffer == 0) && (BSckFetchData(pBSD, iTimeout) <= 0))
- return (BSOCK_EOF);
- int iChar = (int) pBSD->pszBuffer[pBSD->iReadIndex];
- pBSD->iReadIndex = INext(pBSD->iReadIndex, pBSD->iBufferSize);
- --pBSD->iBytesInBuffer;
- return (iChar);
- }
- char *BSckChGetString(BSOCK_HANDLE hBSock, char *pszBuffer, int iMaxChars, int iTimeout,
- int *pLineLength, int *piGotNL)
- {
- int ii;
- for (ii = 0, iMaxChars--; ii < iMaxChars; ii++) {
- int iChar = BSckGetChar(hBSock, iTimeout);
- if (iChar == BSOCK_EOF)
- return (NULL);
- if (iChar == 'n') {
- for (; (ii > 0) && (pszBuffer[ii - 1] == 'r'); ii--);
- pszBuffer[ii] = ' ';
- if (pLineLength != NULL)
- *pLineLength = ii;
- if (piGotNL != NULL)
- *piGotNL = 1;
- return (pszBuffer);
- } else
- pszBuffer[ii] = (char) iChar;
- }
- pszBuffer[ii] = ' ';
- if (pLineLength != NULL)
- *pLineLength = ii;
- if (piGotNL != NULL) {
- *piGotNL = 0;
- return (pszBuffer);
- }
- ErrSetErrorCode(ERR_LINE_TOO_LONG);
- return (NULL);
- }
- char *BSckGetString(BSOCK_HANDLE hBSock, char *pszBuffer, int iMaxChars, int iTimeout,
- int *pLineLength, int *piGotNL)
- {
- int ii;
- BuffSocketData *pBSD = (BuffSocketData *) hBSock;
- for (ii = 0, iMaxChars--; ii < iMaxChars;) {
- ///////////////////////////////////////////////////////////////////////////////
- // Verify to have something to read
- ///////////////////////////////////////////////////////////////////////////////
- if ((pBSD->iBytesInBuffer == 0) && (BSckFetchData(pBSD, iTimeout) <= 0))
- return (NULL);
- int iBytesLookup = Min(pBSD->iBytesInBuffer, iMaxChars - ii);
- if (iBytesLookup > 0) {
- char *pszNL = (char *) memchr(pBSD->pszBuffer + pBSD->iReadIndex, 'n',
- iBytesLookup);
- if (pszNL != NULL) {
- int iCopySize =
- (int) (pszNL - (pBSD->pszBuffer + pBSD->iReadIndex));
- memcpy(pszBuffer + ii, pBSD->pszBuffer + pBSD->iReadIndex,
- iCopySize);
- ii += iCopySize;
- pBSD->iReadIndex += iCopySize + 1;
- pBSD->iBytesInBuffer -= iCopySize + 1;
- ///////////////////////////////////////////////////////////////////////////////
- // Line cleanup
- ///////////////////////////////////////////////////////////////////////////////
- for (; (ii > 0) && (pszBuffer[ii - 1] == 'r'); ii--);
- pszBuffer[ii] = ' ';
- if (pLineLength != NULL)
- *pLineLength = ii;
- if (piGotNL != NULL)
- *piGotNL = 1;
- return (pszBuffer);
- } else {
- memcpy(pszBuffer + ii, pBSD->pszBuffer + pBSD->iReadIndex,
- iBytesLookup);
- ii += iBytesLookup;
- pBSD->iReadIndex += iBytesLookup;
- pBSD->iBytesInBuffer -= iBytesLookup;
- }
- }
- }
- pszBuffer[ii] = ' ';
- if (pLineLength != NULL)
- *pLineLength = ii;
- if (piGotNL != NULL) {
- *piGotNL = 0;
- return (pszBuffer);
- }
- ErrSetErrorCode(ERR_LINE_TOO_LONG);
- return (NULL);
- }
- int BSckSendString(BSOCK_HANDLE hBSock, char const *pszBuffer, int iTimeout)
- {
- BuffSocketData *pBSD = (BuffSocketData *) hBSock;
- char *pszSendBuffer = (char *) SysAlloc(strlen(pszBuffer) + 3);
- if (pszSendBuffer == NULL)
- return (ErrGetErrorCode());
- sprintf(pszSendBuffer, "%srn", pszBuffer);
- int iSendLength = strlen(pszSendBuffer);
- if (SysSend(pBSD->SockFD, pszSendBuffer, iSendLength, iTimeout) != iSendLength) {
- SysFree(pszSendBuffer);
- return (ErrGetErrorCode());
- }
- SysFree(pszSendBuffer);
- return (iSendLength);
- }
- int BSckVSendString(BSOCK_HANDLE hBSock, int iTimeout, char const *pszFormat, ...)
- {
- char *pszBuffer = NULL;
- STRSPRINTF(pszBuffer, pszFormat, pszFormat);
- if (pszBuffer == NULL)
- return (ErrGetErrorCode());
- if (BSckSendString(hBSock, pszBuffer, iTimeout) < 0) {
- ErrorPush();
- SysFree(pszBuffer);
- return (ErrorPop());
- }
- SysFree(pszBuffer);
- return (0);
- }
- int BSckSendData(BSOCK_HANDLE hBSock, char const *pszBuffer, int iSize, int iTimeout)
- {
- BuffSocketData *pBSD = (BuffSocketData *) hBSock;
- if (SysSend(pBSD->SockFD, pszBuffer, iSize, iTimeout) != iSize)
- return (ErrGetErrorCode());
- return (iSize);
- }
- int BSckReadData(BSOCK_HANDLE hBSock, char *pszBuffer, int iSize, int iTimeout)
- {
- BuffSocketData *pBSD = (BuffSocketData *) hBSock;
- int iReadedBytes = 0;
- int iReadFromBuffer = Min(iSize, pBSD->iBytesInBuffer);
- if (iReadFromBuffer > 0) {
- memcpy(pszBuffer, pBSD->pszBuffer + pBSD->iReadIndex, iReadFromBuffer);
- pBSD->iReadIndex += iReadFromBuffer;
- pBSD->iBytesInBuffer -= iReadFromBuffer;
- iReadedBytes = iReadFromBuffer;
- }
- if ((iReadedBytes < iSize) &&
- (SysRecv(pBSD->SockFD, pszBuffer + iReadedBytes, iSize - iReadedBytes,
- iTimeout) != (iSize - iReadedBytes)))
- return (ErrGetErrorCode());
- return (iSize);
- }
- SYS_SOCKET BSckGetAttachedSocket(BSOCK_HANDLE hBSock)
- {
- BuffSocketData *pBSD = (BuffSocketData *) hBSock;
- return (pBSD->SockFD);
- }