mirror of https://github.com/tp4a/teleport
89 lines
3.5 KiB
C
89 lines
3.5 KiB
C
/*
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* This file is part of the SSH Library
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*
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* Copyright (c) 2009 by Aris Adamantiadis
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef BUFFER_H_
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#define BUFFER_H_
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#include <stdarg.h>
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#include "libssh/libssh.h"
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/*
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* Describes a buffer state
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* [XXXXXXXXXXXXDATA PAYLOAD XXXXXXXXXXXXXXXXXXXXXXXX]
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* ^ ^ ^ ^]
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* \_data points\_pos points here \_used points here | /
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* here Allocated
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*/
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struct ssh_buffer_struct {
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char *data;
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uint32_t used;
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uint32_t allocated;
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uint32_t pos;
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int secure;
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};
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#define SSH_BUFFER_PACK_END ((uint32_t) 0x4f65feb3)
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void ssh_buffer_set_secure(ssh_buffer buffer);
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int ssh_buffer_add_ssh_string(ssh_buffer buffer, ssh_string string);
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int ssh_buffer_add_u8(ssh_buffer buffer, uint8_t data);
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int ssh_buffer_add_u16(ssh_buffer buffer, uint16_t data);
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int ssh_buffer_add_u32(ssh_buffer buffer, uint32_t data);
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int ssh_buffer_add_u64(ssh_buffer buffer, uint64_t data);
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int ssh_buffer_pack_va(struct ssh_buffer_struct *buffer,
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const char *format,
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int argc,
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va_list ap);
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int _ssh_buffer_pack(struct ssh_buffer_struct *buffer,
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const char *format,
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int argc,
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...);
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#define ssh_buffer_pack(buffer, format, ...) \
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_ssh_buffer_pack((buffer), (format), __VA_NARG__(__VA_ARGS__), __VA_ARGS__, SSH_BUFFER_PACK_END)
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int ssh_buffer_unpack_va(struct ssh_buffer_struct *buffer,
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const char *format, int argc,
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va_list ap);
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int _ssh_buffer_unpack(struct ssh_buffer_struct *buffer,
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const char *format,
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int argc,
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...);
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#define ssh_buffer_unpack(buffer, format, ...) \
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_ssh_buffer_unpack((buffer), (format), __VA_NARG__(__VA_ARGS__), __VA_ARGS__, SSH_BUFFER_PACK_END)
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int ssh_buffer_prepend_data(ssh_buffer buffer, const void *data, uint32_t len);
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int ssh_buffer_add_buffer(ssh_buffer buffer, ssh_buffer source);
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/* buffer_read_*() returns the number of bytes read, except for ssh strings */
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int ssh_buffer_get_u8(ssh_buffer buffer, uint8_t *data);
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int ssh_buffer_get_u32(ssh_buffer buffer, uint32_t *data);
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int ssh_buffer_get_u64(ssh_buffer buffer, uint64_t *data);
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/* ssh_buffer_get_ssh_string() is an exception. if the String read is too large or invalid, it will answer NULL. */
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ssh_string ssh_buffer_get_ssh_string(ssh_buffer buffer);
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/* ssh_gets a string out of a SSH-1 mpint */
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ssh_string ssh_buffer_get_mpint(ssh_buffer buffer);
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/* ssh_buffer_pass_bytes acts as if len bytes have been read (used for padding) */
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uint32_t ssh_buffer_pass_bytes_end(ssh_buffer buffer, uint32_t len);
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uint32_t ssh_buffer_pass_bytes(ssh_buffer buffer, uint32_t len);
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#endif /* BUFFER_H_ */
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