libssh  0.6.3
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 struct ssh_socket_struct;
25 
26 /* this structure should go someday */
27 typedef struct packet_struct {
28  int valid;
29  uint32_t len;
30  uint8_t type;
31 } PACKET;
32 
34 enum ssh_packet_state_e {
36  PACKET_STATE_INIT,
38  PACKET_STATE_SIZEREAD,
41  PACKET_STATE_PROCESSING
42 };
43 
44 enum ssh_packet_filter_result_e {
45  SSH_PACKET_UNKNOWN,
46  SSH_PACKET_ALLOWED,
47  SSH_PACKET_DENIED
48 };
49 
50 int packet_send(ssh_session session);
51 
52 #ifdef WITH_SSH1
53 int packet_send1(ssh_session session) ;
54 void ssh_packet_set_default_callbacks1(ssh_session session);
55 
56 SSH_PACKET_CALLBACK(ssh_packet_disconnect1);
57 SSH_PACKET_CALLBACK(ssh_packet_smsg_success1);
58 SSH_PACKET_CALLBACK(ssh_packet_smsg_failure1);
59 int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user);
60 
61 #endif
62 
63 SSH_PACKET_CALLBACK(ssh_packet_unimplemented);
64 SSH_PACKET_CALLBACK(ssh_packet_disconnect_callback);
65 SSH_PACKET_CALLBACK(ssh_packet_ignore_callback);
66 SSH_PACKET_CALLBACK(ssh_packet_dh_reply);
67 SSH_PACKET_CALLBACK(ssh_packet_newkeys);
68 SSH_PACKET_CALLBACK(ssh_packet_service_accept);
69 
70 #ifdef WITH_SERVER
71 SSH_PACKET_CALLBACK(ssh_packet_kexdh_init);
72 #endif
73 
74 int ssh_packet_send_unimplemented(ssh_session session, uint32_t seqnum);
75 int ssh_packet_parse_type(ssh_session session);
76 //int packet_flush(ssh_session session, int enforce_blocking);
77 
78 int ssh_packet_socket_callback(const void *data, size_t len, void *user);
79 void ssh_packet_register_socket_callback(ssh_session session, struct ssh_socket_struct *s);
80 void ssh_packet_set_callbacks(ssh_session session, ssh_packet_callbacks callbacks);
81 void ssh_packet_set_default_callbacks(ssh_session session);
82 void ssh_packet_process(ssh_session session, uint8_t type);
83 
84 /* PACKET CRYPT */
85 uint32_t packet_decrypt_len(ssh_session session, char *crypted);
86 int packet_decrypt(ssh_session session, void *packet, unsigned int len);
87 unsigned char *packet_encrypt(ssh_session session,
88  void *packet,
89  unsigned int len);
90 int packet_hmac_verify(ssh_session session,ssh_buffer buffer,
91  unsigned char *mac);
92 
93 #endif /* PACKET_H_ */