122 lines
4.0 KiB
C
122 lines
4.0 KiB
C
/*
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* The Qubes OS Project, http://www.qubes-os.org
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*
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* Copyright (C) 2010 Rafal Wojtczuk <rafal@invisiblethingslab.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/* See also http://wiki.qubes-os.org/trac/wiki/Qrexec */
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#include <stdint.h>
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#define QREXEC_PROTOCOL_VERSION 2
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#define MAX_FDS 256
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#define MAX_DATA_CHUNK 4096
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#define RPC_REQUEST_COMMAND "QUBESRPC"
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#define RPC_REQUEST_COMMAND_LEN (sizeof(RPC_REQUEST_COMMAND)-1)
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#define NOGUI_CMD_PREFIX "nogui:"
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#define NOGUI_CMD_PREFIX_LEN (sizeof(NOGUI_CMD_PREFIX)-1)
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#define VCHAN_BASE_PORT 512
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/* Messages sent over control vchan between daemon(dom0) and agent(vm).
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* The same are used between client(dom0) and daemon(dom0).
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*/
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enum {
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/* daemon->agent messages */
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/* start process in VM and pass its stdin/out/err to dom0
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* struct exec_params passed as data */
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MSG_EXEC_CMDLINE = 0x200,
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/* start process in VM discarding its stdin/out/err (connect to /dev/null)
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* struct exec_params passed as data */
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MSG_JUST_EXEC,
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/* connect to existing process in VM to receive its stdin/out/err
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* struct service_params passed as cmdline field in exec_params */
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MSG_SERVICE_CONNECT,
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/* refuse to start a service (denied by policy, invalid parameters etc)
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* struct service_params passed as data to identify which service call was
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* refused */
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MSG_SERVICE_REFUSED,
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/* agent->daemon messages */
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/* call Qubes RPC service
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* struct trigger_service_params passed as data */
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MSG_TRIGGER_SERVICE = 0x210,
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/* connection was terminated, struct exec_params passed as data (with empty
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* cmdline field) informs about released vchan port */
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MSG_CONNECTION_TERMINATED,
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/* common messages */
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/* initialize connection, struct peer_info passed as data
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* should be sent as the first message (server first, then client) */
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MSG_HELLO = 0x300,
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};
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/* uniform for all peers, data type depends on message type */
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struct msg_header {
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uint32_t type; /* message type */
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uint32_t len; /* data length */
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};
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/* variable size */
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struct exec_params {
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uint32_t connect_domain; /* target domain name */
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uint32_t connect_port; /* target vchan port for i/o exchange */
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char cmdline[0]; /* command line to execute, null terminated, size = msg_header.len - sizeof(struct exec_params) */
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};
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struct service_params {
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char ident[32]; /* null terminated ASCII string */
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};
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struct trigger_service_params {
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char service_name[64]; /* null terminated ASCII string */
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char target_domain[32]; /* null terminated ASCII string */
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struct service_params request_id; /* service request id */
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};
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struct peer_info {
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uint32_t version; /* qrexec protocol version */
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};
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/* data vchan client<->agent, separate for each VM process */
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enum {
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/* stdin dom0->VM */
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MSG_DATA_STDIN = 0x190,
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/* stdout VM->dom0 */
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MSG_DATA_STDOUT,
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/* stderr VM->dom0 */
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MSG_DATA_STDERR,
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/* VM process exit code VM->dom0 (uint32_t) */
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MSG_DATA_EXIT_CODE,
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};
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// linux-specific stuff below
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#define QREXEC_AGENT_TRIGGER_PATH "/var/run/qubes/qrexec-agent"
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#define QREXEC_AGENT_FDPASS_PATH "/var/run/qubes/qrexec-agent-fdpass"
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#define MEMINFO_WRITER_PIDFILE "/var/run/meminfo-writer.pid"
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#define QUBES_RPC_MULTIPLEXER_PATH "/usr/lib/qubes/qubes-rpc-multiplexer"
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#define QREXEC_DAEMON_SOCKET_DIR "/var/run/qubes"
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