67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
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/**
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* xrdp: A Remote Desktop Protocol server.
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*
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* Copyright (C) 2021 Matt Burt
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Enforce stream primitive checking
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*/
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#if defined(HAVE_CONFIG_H)
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#include <config_ac.h>
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#endif
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#include <stdlib.h>
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#include "arch.h"
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#include "parse.h"
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#include "log.h"
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void
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parser_stream_overflow_check(const struct stream *s, int n, int is_out,
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const char *file, int line)
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{
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/* Sanity checks */
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if (n < 0)
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{
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LOG(LOG_LEVEL_ALWAYS, "%s:%d "
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"stream primitive called with negative n=%d",
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file, line, n);
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abort();
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}
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if (is_out)
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{
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/* Output overflow */
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if (!s_check_rem_out(s, n))
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{
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LOG(LOG_LEVEL_ALWAYS, "%s:%d Stream output buffer overflow. "
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"Size=%d, pos=%d, requested=%d", file, line,
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s->size, (int)(s->p - s->data), n);
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abort();
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}
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}
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else
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{
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/* Input overflow */
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if (!s_check_rem(s, n))
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{
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LOG(LOG_LEVEL_ALWAYS, "%s:%d Stream input buffer overflow. "
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"Max=%d, pos=%d, requested=%d", file, line,
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(int)(s->end - s->data), (int)(s->p - s->data), n);
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abort();
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}
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}
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}
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