88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/*
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* Author: Microsoft Corp.
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*
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* Copyright (c) 2015 Microsoft Corp.
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* All rights reserved
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*
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* Microsoft openssh win32 port
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* tnnet.c
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*
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* Contains terminal emulation related network calls to invoke ANSI parsing engine
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <windows.h>
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#include "ansiprsr.h"
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#define dwBuffer 4096
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// Server will always be returning a sequence of ANSI control characters which the client
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// protocol can either passthru directly to the console or transform based on an output terminal
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// type. We're not using termcap so we're only supporting the ANSI (vt100) sequences that
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// are hardcoded in the server and will be transformed to Windows Console commands.
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size_t telProcessNetwork(char *buf, size_t len, unsigned char **respbuf, size_t *resplen)
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{
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unsigned char szBuffer[dwBuffer + 8];
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unsigned char* pszNewHead = NULL;
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unsigned char* pszHead = NULL;
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unsigned char* pszTail = NULL;
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if (len == 0)
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return len;
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// Transform a single carriage return into a single linefeed before
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// continuing.
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if ((len == 1) && (buf[0] == 13))
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buf[0] = 10;
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pszTail = (unsigned char *)buf;
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pszHead = (unsigned char *)buf;
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pszTail += len;
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pszNewHead = pszHead;
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// Loop through the network buffer transforming characters as necessary.
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// The buffer will be empty after the transformation
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// process since the buffer will contain only commands that are handled by the console API.
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do {
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pszHead = pszNewHead;
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pszNewHead = ParseBuffer(pszHead, pszTail, respbuf, resplen);
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} while ((pszNewHead != pszHead) && (pszNewHead < pszTail) && (resplen == NULL || (resplen != NULL && *resplen == 0)));
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len = 0;
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return len;
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}
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