libssh  0.10.6
The SSH library
buffer.h
1 /*
2  * This file is part of the SSH Library
3  *
4  * Copyright (c) 2009 by Aris Adamantiadis
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef BUFFER_H_
22 #define BUFFER_H_
23 
24 #include <stdarg.h>
25 
26 #include "libssh/libssh.h"
27 
28 #define SSH_BUFFER_PACK_END ((uint32_t) 0x4f65feb3)
29 
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33 
35 int ssh_buffer_add_ssh_string(ssh_buffer buffer, ssh_string string);
36 int ssh_buffer_add_u8(ssh_buffer buffer, uint8_t data);
37 int ssh_buffer_add_u16(ssh_buffer buffer, uint16_t data);
38 int ssh_buffer_add_u32(ssh_buffer buffer, uint32_t data);
39 int ssh_buffer_add_u64(ssh_buffer buffer, uint64_t data);
40 
41 int ssh_buffer_validate_length(struct ssh_buffer_struct *buffer, size_t len);
42 
43 void *ssh_buffer_allocate(struct ssh_buffer_struct *buffer, uint32_t len);
44 int ssh_buffer_allocate_size(struct ssh_buffer_struct *buffer, uint32_t len);
45 int ssh_buffer_pack_va(struct ssh_buffer_struct *buffer,
46  const char *format,
47  size_t argc,
48  va_list ap);
49 int _ssh_buffer_pack(struct ssh_buffer_struct *buffer,
50  const char *format,
51  size_t argc,
52  ...);
53 #define ssh_buffer_pack(buffer, format, ...) \
54  _ssh_buffer_pack((buffer), (format), __VA_NARG__(__VA_ARGS__), __VA_ARGS__, SSH_BUFFER_PACK_END)
55 
56 int ssh_buffer_unpack_va(struct ssh_buffer_struct *buffer,
57  const char *format, size_t argc,
58  va_list ap);
59 int _ssh_buffer_unpack(struct ssh_buffer_struct *buffer,
60  const char *format,
61  size_t argc,
62  ...);
63 #define ssh_buffer_unpack(buffer, format, ...) \
64  _ssh_buffer_unpack((buffer), (format), __VA_NARG__(__VA_ARGS__), __VA_ARGS__, SSH_BUFFER_PACK_END)
65 
66 int ssh_buffer_prepend_data(ssh_buffer buffer, const void *data, uint32_t len);
67 int ssh_buffer_add_buffer(ssh_buffer buffer, ssh_buffer source);
68 
69 /* buffer_read_*() returns the number of bytes read, except for ssh strings */
70 uint32_t ssh_buffer_get_u8(ssh_buffer buffer, uint8_t *data);
71 uint32_t ssh_buffer_get_u32(ssh_buffer buffer, uint32_t *data);
72 uint32_t ssh_buffer_get_u64(ssh_buffer buffer, uint64_t *data);
73 
74 /* ssh_buffer_get_ssh_string() is an exception. if the String read is too large or invalid, it will answer NULL. */
75 ssh_string ssh_buffer_get_ssh_string(ssh_buffer buffer);
76 
77 /* ssh_buffer_pass_bytes acts as if len bytes have been read (used for padding) */
78 uint32_t ssh_buffer_pass_bytes_end(ssh_buffer buffer, uint32_t len);
79 uint32_t ssh_buffer_pass_bytes(ssh_buffer buffer, uint32_t len);
80 
81 #ifdef __cplusplus
82 }
83 #endif
84 
85 #endif /* BUFFER_H_ */
ssh_buffer_validate_length
int ssh_buffer_validate_length(struct ssh_buffer_struct *buffer, size_t len)
Validates that the given length can be obtained from the buffer.
Definition: buffer.c:749
ssh_buffer_struct
Definition: buffer.c:48
ssh_buffer_set_secure
void ssh_buffer_set_secure(ssh_buffer buffer)
Sets the buffer as secure.
Definition: buffer.c:177
ssh_string_struct
Definition: string.h:33
ssh_buffer_allocate_size
int ssh_buffer_allocate_size(struct ssh_buffer_struct *buffer, uint32_t len)
Ensure the buffer has at least a certain preallocated size.
Definition: buffer.c:341