libssh: packet.h Source File

libssh 0.11.1 The SSH library

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packet.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 PACKET_H_
22#define PACKET_H_
23
24#include "libssh/wrapper.h"
25
26struct ssh_socket_struct;
27
28/* this structure should go someday */
29typedef struct packet_struct {
30 int valid;
31 uint32_t len;
32 uint8_t type;
33} PACKET;
34
36enum ssh_packet_state_e {
38 PACKET_STATE_INIT,
40 PACKET_STATE_SIZEREAD,
43 PACKET_STATE_PROCESSING
44};
45
46enum ssh_packet_filter_result_e {
47 SSH_PACKET_UNKNOWN,
48 SSH_PACKET_ALLOWED,
49 SSH_PACKET_DENIED
50};
51
52int ssh_packet_send(ssh_session session);
53
54#ifdef __cplusplus
55extern "C" {
56#endif
57
58 SSH_PACKET_CALLBACK(ssh_packet_unimplemented);
59 SSH_PACKET_CALLBACK(ssh_packet_disconnect_callback);
60 SSH_PACKET_CALLBACK(ssh_packet_ignore_callback);
61 SSH_PACKET_CALLBACK(ssh_packet_dh_reply);
62 SSH_PACKET_CALLBACK(ssh_packet_newkeys);
63 SSH_PACKET_CALLBACK(ssh_packet_service_accept);
64 SSH_PACKET_CALLBACK(ssh_packet_ext_info);
65
66#ifdef WITH_SERVER
67 SSH_PACKET_CALLBACK(ssh_packet_kexdh_init);
68#endif
69
70int ssh_packet_send_newkeys(ssh_session session);
71int ssh_packet_send_unimplemented(ssh_session session, uint32_t seqnum);
72int ssh_packet_parse_type(ssh_session session);
73//int packet_flush(ssh_session session, int enforce_blocking);
74
75size_t ssh_packet_socket_callback(const void *data, size_t len, void *user);
76void ssh_packet_register_socket_callback(ssh_session session, struct ssh_socket_struct *s);
77void ssh_packet_set_callbacks(ssh_session session, ssh_packet_callbacks callbacks);
78void ssh_packet_remove_callbacks(ssh_session session, ssh_packet_callbacks callbacks);
79void ssh_packet_set_default_callbacks(ssh_session session);
80void ssh_packet_process(ssh_session session, uint8_t type);
81
82/* PACKET CRYPT */
83uint32_t ssh_packet_decrypt_len(ssh_session session, uint8_t *destination, uint8_t *source);
84int ssh_packet_decrypt(ssh_session session, uint8_t *destination, uint8_t *source,
85 size_t start, size_t encrypted_size);
86unsigned char *ssh_packet_encrypt(ssh_session session,
87 void *packet,
88 size_t len);
89int ssh_packet_hmac_verify(ssh_session session, const void *data, size_t len,
90 unsigned char *mac, enum ssh_hmac_e type);
91int ssh_packet_set_newkeys(ssh_session session,
92 enum ssh_crypto_direction_e direction);
93struct ssh_crypto_struct *ssh_packet_get_current_crypto(ssh_session session,
94 enum ssh_crypto_direction_e direction);
95
96#ifdef __cplusplus
97}
98#endif
99
100#endif /* PACKET_H_ */
SSH_PACKET_CALLBACK
#define SSH_PACKET_CALLBACK(name)
This macro declares a packet callback handler.
Definition callbacks.h:560