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
35/** different state of packet reading. */
36enum ssh_packet_state_e {
37 /** Packet not initialized, must read the size of packet */
38 PACKET_STATE_INIT,
39 /** Size was read, waiting for the rest of data */
40 PACKET_STATE_SIZEREAD,
41 /** Full packet was read and callbacks are being called. Future packets
42 * should wait for the end of the callback. */
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 packet_send(ssh_session session);
53
54#ifdef WITH_SSH1
55int packet_send1(ssh_session session) ;
56void ssh_packet_set_default_callbacks1(ssh_session session);
57
58SSH_PACKET_CALLBACK(ssh_packet_disconnect1);
59SSH_PACKET_CALLBACK(ssh_packet_smsg_success1);
60SSH_PACKET_CALLBACK(ssh_packet_smsg_failure1);
61int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user);
62
63#endif
64
65SSH_PACKET_CALLBACK(ssh_packet_unimplemented);
66SSH_PACKET_CALLBACK(ssh_packet_disconnect_callback);
67SSH_PACKET_CALLBACK(ssh_packet_ignore_callback);
68SSH_PACKET_CALLBACK(ssh_packet_dh_reply);
69SSH_PACKET_CALLBACK(ssh_packet_newkeys);
70SSH_PACKET_CALLBACK(ssh_packet_service_accept);
71
72#ifdef WITH_SERVER
73SSH_PACKET_CALLBACK(ssh_packet_kexdh_init);
74#endif
75
76int ssh_packet_send_unimplemented(ssh_session session, uint32_t seqnum);
77int ssh_packet_parse_type(ssh_session session);
78//int packet_flush(ssh_session session, int enforce_blocking);
79
80int ssh_packet_socket_callback(const void *data, size_t len, void *user);
81void ssh_packet_register_socket_callback(ssh_session session, struct ssh_socket_struct *s);
82void ssh_packet_set_callbacks(ssh_session session, ssh_packet_callbacks callbacks);
83void ssh_packet_set_default_callbacks(ssh_session session);
84void ssh_packet_process(ssh_session session, uint8_t type);
85
86/* PACKET CRYPT */
87uint32_t packet_decrypt_len(ssh_session session, char *crypted);
88int packet_decrypt(ssh_session session, void *packet, unsigned int len);
89unsigned char *packet_encrypt(ssh_session session,
90 void *packet,
91 unsigned int len);
92int packet_hmac_verify(ssh_session session,ssh_buffer buffer,
93 unsigned char *mac, enum ssh_hmac_e type);
94
95#endif /* PACKET_H_ */
96