add client/server (not tested yet)

server.h

@@ -0,0 +1,73 @@
+/*
+ * This file is part of the CCD_Capture project.
+ * Copyright 2022 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#ifndef SERVER_H__
+#define SERVER_H__
+
+typedef enum{
+    CAMERA_IDLE,        // idle state, client send this to cancel capture
+    CAMERA_CAPTURE,     // capturing frame, client send this to start capture
+    CAMERA_FRAMERDY,    // frame ready to be saved
+    CAMERA_ERROR        // can't do exposition
+} camera_state;
+
+// pause (seconds) between temperature logging
+#define TLOG_PAUSE  60.
+
+// server-side functions
+void server(int fd);
+
+// common information about everything
+#define CMD_INFO        "info"
+
+// CCD/CMOS
+#define CMD_CAMLIST     "camlist"
+#define CMD_CAMDEVNO    "camdevno"
+#define CMD_EXPOSITION  "exptime"
+#define CMD_FILENAME    "filename"
+#define CMD_FILENAMEPREFIX "filenameprefix"
+// rewrite=1 will rewrite files, =0 - not (only for `filename`)
+#define CMD_REWRITE     "rewrite"
+#define CMD_HBIN        "hbin"
+#define CMD_VBIN        "vbin"
+#define CMD_CAMTEMPER   "tcold"
+#define CMD_CAMFANSPD   "ccdfanspeed"
+#define CMD_SHUTTER     "shutter"
+#define CMD_CONFIO      "confio"
+#define CMD_IO          "io"
+#define CMD_GAIN        "gain"
+#define CMD_BRIGHTNESS  "brightness"
+#define CMD_FRAMEFORMAT "format"
+#define CMD_FRAMEMAX    "maxformat"
+#define CMD_NFLUSHES    "nflushes"
+// expstate=CAMERA_CAPTURE will start exposition, CAMERA_IDLE - cancel
+#define CMD_EXPSTATE    "expstate"
+#define CMD_TREMAIN     "tremain"
+
+// focuser
+#define CMD_FOCLIST     "foclist"
+#define CMD_FDEVNO      "focdevno"
+#define CMD_FGOTO       "focgoto"
+
+// wheel
+#define CMD_WLIST       "wlist"
+#define CMD_WDEVNO      "wdevno"
+#define CMD_WPOS        "wpos"
+
+#endif // SERVER_H__