|
26
|
1 #include "includes.h" |
|
|
2 #include "session.h" |
|
|
3 #include "dbutil.h" |
|
|
4 #include "kex.h" |
|
|
5 #include "ssh.h" |
|
|
6 #include "packet.h" |
|
|
7 #include "tcpfwd-direct.h" |
|
|
8 #include "tcpfwd-remote.h" |
|
|
9 #include "channel.h" |
|
|
10 #include "random.h" |
|
|
11 |
|
|
12 static void cli_remoteclosed(); |
|
|
13 static void cli_sessionloop(); |
|
|
14 |
|
|
15 struct clientsession cli_ses; /* GLOBAL */ |
|
|
16 |
|
|
17 static const packettype cli_packettypes[] = { |
|
|
18 /* TYPE, AUTHREQUIRED, FUNCTION */ |
|
|
19 {SSH_MSG_KEXINIT, recv_msg_kexinit}, |
|
|
20 {SSH_MSG_KEXDH_REPLY, recv_msg_kexdh_reply}, // client |
|
|
21 {SSH_MSG_NEWKEYS, recv_msg_newkeys}, |
|
|
22 {SSH_MSG_CHANNEL_DATA, recv_msg_channel_data}, |
|
|
23 {SSH_MSG_CHANNEL_WINDOW_ADJUST, recv_msg_channel_window_adjust}, |
|
|
24 {SSH_MSG_GLOBAL_REQUEST, recv_msg_global_request_remotetcp}, |
|
|
25 {SSH_MSG_CHANNEL_REQUEST, recv_msg_channel_request}, |
|
|
26 {SSH_MSG_CHANNEL_OPEN, recv_msg_channel_open}, |
|
|
27 {SSH_MSG_CHANNEL_EOF, recv_msg_channel_eof}, |
|
|
28 {SSH_MSG_CHANNEL_CLOSE, recv_msg_channel_close}, |
|
|
29 {SSH_MSG_CHANNEL_OPEN_CONFIRMATION, recv_msg_channel_open_confirmation}, |
|
|
30 {SSH_MSG_CHANNEL_OPEN_FAILURE, recv_msg_channel_open_failure}, |
|
|
31 {0, 0} /* End */ |
|
|
32 }; |
|
|
33 |
|
|
34 static const struct ChanType *cli_chantypes[] = { |
|
|
35 // &clichansess, |
|
|
36 /* &chan_tcpdirect etc, though need to only allow if we've requested |
|
|
37 * that forwarding */ |
|
|
38 NULL /* Null termination */ |
|
|
39 }; |
|
|
40 void cli_session(int sock, char* remotehost) { |
|
|
41 |
|
|
42 crypto_init(); |
|
|
43 common_session_init(sock, remotehost); |
|
|
44 |
|
|
45 chaninitialise(cli_chantypes); |
|
|
46 |
|
|
47 /* For printing "remote host closed" for the user */ |
|
|
48 session_remoteclosed = cli_remoteclosed; |
|
|
49 |
|
|
50 /* packet handlers */ |
|
|
51 ses.packettypes = cli_packettypes; |
|
|
52 |
|
|
53 /* Ready to go */ |
|
|
54 sessinitdone = 1; |
|
|
55 |
|
|
56 /* Exchange identification */ |
|
|
57 session_identification(); |
|
|
58 |
|
|
59 seedrandom(); |
|
|
60 |
|
|
61 send_msg_kexinit(); |
|
|
62 |
|
|
63 /* XXX here we do stuff differently */ |
|
|
64 |
|
|
65 session_loop(cli_sessionloop); |
|
|
66 |
|
|
67 /* Not reached */ |
|
|
68 |
|
|
69 |
|
|
70 } |
|
|
71 |
|
|
72 static void cli_sessionloop() { |
|
|
73 |
|
|
74 switch (cli_ses.state) { |
|
|
75 |
|
|
76 KEXINIT_RCVD: |
|
|
77 /* We initiate the KEX. If DH wasn't the correct type, the KEXINIT |
|
|
78 * negotiation would have failed. */ |
|
|
79 send_msg_kexdh_init(); |
|
|
80 cli_ses.state = KEXDH_INIT_SENT; |
|
|
81 break; |
|
|
82 |
|
|
83 default: |
|
|
84 break; |
|
|
85 } |
|
|
86 |
|
|
87 if (cli_ses.donefirstkex && !cli_ses.authdone) { |
|
|
88 |
|
|
89 |
|
|
90 |
|
|
91 } |
|
|
92 |
|
|
93 /* called when the remote side closes the connection */ |
|
|
94 static void cli_remoteclosed() { |
|
|
95 |
|
|
96 /* XXX TODO perhaps print a friendlier message if we get this but have |
|
|
97 * already sent/received disconnect message(s) ??? */ |
|
|
98 close(ses.sock); |
|
|
99 ses.sock = -1; |
|
|
100 dropbear_exit("%s closed the connection", ses.remotehost); |
|
|
101 } |
