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; sshlib_channel.inc - SSH channel |
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; |
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; Copyright (C) 2016-2024 Jeffrey Amelynck |
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; |
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; This program is free software: you can redistribute it and/or modify |
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; it under the terms of the GNU General Public License as published by |
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; the Free Software Foundation, either version 3 of the License, or |
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; (at your option) any later version. |
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; |
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; This program is distributed in the hope that it will be useful, |
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; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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; GNU General Public License for more details. |
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; |
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; You should have received a copy of the GNU General Public License |
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; along with this program. If not, see . |
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proc sshlib_chan_open con_ptr; Channel struct ptr?! |
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; >> Open channel |
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DEBUGF 2, "SSH: Opening channel\n" |
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mov [ssh_chan.rcv_wnd], BUFFERSIZE |
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mov [ssh_chan.snd_wnd], 0 |
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stdcall sshlib_send_packet, [con_ptr], ssh_msg_channel_open, ssh_msg_channel_open.length, 0 |
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cmp eax, 0 |
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jl .err |
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; << Check for channel open confirmation |
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stdcall sshlib_msg_handler, [con_ptr], 0 |
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cmp eax, 0 |
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jl .err |
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mov esi, [con_ptr] |
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cmp [esi + sshlib_connection.rx_buffer.message_code], SSH_MSG_CHANNEL_OPEN_CONFIRMATION |
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jne .err_proto |
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DEBUGF 2, "SSH: Channel opened successfully\n" |
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; >> Channel request: pty |
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DEBUGF 2, "SSH: Requesting PTY\n" |
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stdcall sshlib_send_packet, [con_ptr], ssh_msg_channel_request, ssh_msg_channel_request.length, 0 |
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cmp eax, 0 |
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jl .err |
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; << Check for channel request confirmation |
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stdcall sshlib_msg_handler, [con_ptr], 0 |
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cmp eax, 0 |
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jl .err |
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mov esi, [con_ptr] |
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cmp [esi + sshlib_connection.rx_buffer.message_code], SSH_MSG_CHANNEL_SUCCESS |
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jne .err_proto |
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DEBUGF 2, "SSH: PTY opened successfully\n" |
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; >> Channel request: shell |
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DEBUGF 2, "SSH: Requesting shell\n" |
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stdcall sshlib_send_packet, [con_ptr], ssh_msg_shell_request, ssh_msg_shell_request.length, 0 |
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cmp eax, 0 |
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jl .err |
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; << Check for channel request confirmation |
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; TODO: timeout |
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.wait_success: |
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stdcall sshlib_msg_handler, [con_ptr], 0 |
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cmp eax, 0 |
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jl .err |
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mov esi, [con_ptr] |
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cmp [esi + sshlib_connection.rx_buffer.message_code], SSH_MSG_CHANNEL_SUCCESS |
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jne .wait_success |
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DEBUGF 2, "SSH: Shell opened successfully\n" |
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xor eax, eax |
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.err: |
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ret |
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.err_proto: |
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mov eax, SSHLIB_ERR_PROTOCOL |
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ret |
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endp |