libserialport_internal.h

   1 /*
   2  * This file is part of the libserialport project.
   3  *
   4  * Copyright (C) 2014 Martin Ling <martin-libserialport@earth.li>
   5  * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Lesser General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #ifndef LIBSERIALPORT_LIBSERIALPORT_INTERNAL_H
  22 #define LIBSERIALPORT_LIBSERIALPORT_INTERNAL_H
  23
  24 #include "config.h"
  25
  26 #ifdef __linux__
  27 #define _BSD_SOURCE /* For timeradd, timersub, timercmp. */
  28 #endif
  29
  30 #include <string.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34 #include <unistd.h>
  35 #include <stdlib.h>
  36 #include <errno.h>
  37 #include <stdio.h>
  38 #include <stdarg.h>
  39 #ifdef _WIN32
  40 #include <windows.h>
  41 #include <tchar.h>
  42 #include <setupapi.h>
  43 #include <cfgmgr32.h>
  44 #undef DEFINE_GUID
  45 #define DEFINE_GUID(name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) \
  46         static const GUID name = { l,w1,w2,{ b1,b2,b3,b4,b5,b6,b7,b8 } }
  47 #include <usbioctl.h>
  48 #include <usbiodef.h>
  49 #else
  50 #include <limits.h>
  51 #include <termios.h>
  52 #include <sys/ioctl.h>
  53 #include <sys/time.h>
  54 #include <limits.h>
  55 #include <poll.h>
  56 #endif
  57 #ifdef __APPLE__
  58 #include <CoreFoundation/CoreFoundation.h>
  59 #include <IOKit/IOKitLib.h>
  60 #include <IOKit/serial/IOSerialKeys.h>
  61 #include <IOKit/serial/ioss.h>
  62 #include <sys/syslimits.h>
  63 #endif
  64 #ifdef __linux__
  65 #include <dirent.h>
  66 #ifndef __ANDROID__
  67 #include "linux/serial.h"
  68 #endif
  69 #include "linux_termios.h"
  70
  71 /* TCGETX/TCSETX is not available everywhere. */
  72 #if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
  73 #define USE_TERMIOX
  74 #endif
  75 #endif
  76
  77 /* TIOCINQ/TIOCOUTQ is not available everywhere. */
  78 #if !defined(TIOCINQ) && defined(FIONREAD)
  79 #define TIOCINQ FIONREAD
  80 #endif
  81 #if !defined(TIOCOUTQ) && defined(FIONWRITE)
  82 #define TIOCOUTQ FIONWRITE
  83 #endif
  84
  85 /* Non-standard baudrates are not available everywhere. */
  86 #if (defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)) && defined(HAVE_BOTHER)
  87 #define USE_TERMIOS_SPEED
  88 #endif
  89
  90 struct sp_port {
  91         char *name;
  92         char *description;
  93         enum sp_transport transport;
  94         int usb_bus;
  95         int usb_address;
  96         int usb_vid;
  97         int usb_pid;
  98         char *usb_manufacturer;
  99         char *usb_product;
 100         char *usb_serial;
 101         char *bluetooth_address;
 102 #ifdef _WIN32
 103         char *usb_path;
 104         HANDLE hdl;
 105         COMMTIMEOUTS timeouts;
 106         OVERLAPPED write_ovl;
 107         OVERLAPPED read_ovl;
 108         OVERLAPPED wait_ovl;
 109         DWORD events;
 110         BYTE pending_byte;
 111         BOOL writing;
 112         BOOL wait_running;
 113 #else
 114         int fd;
 115 #endif
 116 };
 117
 118 struct sp_port_config {
 119         int baudrate;
 120         int bits;
 121         enum sp_parity parity;
 122         int stopbits;
 123         enum sp_rts rts;
 124         enum sp_cts cts;
 125         enum sp_dtr dtr;
 126         enum sp_dsr dsr;
 127         enum sp_xonxoff xon_xoff;
 128 };
 129
 130 struct port_data {
 131 #ifdef _WIN32
 132         DCB dcb;
 133 #else
 134         struct termios term;
 135         int controlbits;
 136         int termiox_supported;
 137         int rts_flow;
 138         int cts_flow;
 139         int dtr_flow;
 140         int dsr_flow;
 141 #endif
 142 };
 143
 144 #ifdef _WIN32
 145 typedef HANDLE event_handle;
 146 #else
 147 typedef int event_handle;
 148 #endif
 149
 150 /* Standard baud rates. */
 151 #ifdef _WIN32
 152 #define BAUD_TYPE DWORD
 153 #define BAUD(n) {CBR_##n, n}
 154 #else
 155 #define BAUD_TYPE speed_t
 156 #define BAUD(n) {B##n, n}
 157 #endif
 158
 159 struct std_baudrate {
 160         BAUD_TYPE index;
 161         int value;
 162 };
 163
 164 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
 165
 166 extern void (*sp_debug_handler)(const char *format, ...);
 167
 168 /* Debug output macros. */
 169 #define DEBUG_FMT(fmt, ...) do { \
 170         if (sp_debug_handler) \
 171                 sp_debug_handler(fmt ".\n", __VA_ARGS__); \
 172 } while (0)
 173 #define DEBUG(msg) DEBUG_FMT(msg, NULL)
 174 #define DEBUG_ERROR(err, msg) DEBUG_FMT("%s returning " #err ": " msg, __func__)
 175 #define DEBUG_FAIL(msg) do {               \
 176         char *errmsg = sp_last_error_message(); \
 177         DEBUG_FMT("%s returning SP_ERR_FAIL: " msg ": %s", __func__, errmsg); \
 178         sp_free_error_message(errmsg); \
 179 } while (0);
 180 #define RETURN() do { \
 181         DEBUG_FMT("%s returning", __func__); \
 182         return; \
 183 } while (0)
 184 #define RETURN_CODE(x) do { \
 185         DEBUG_FMT("%s returning " #x, __func__); \
 186         return x; \
 187 } while (0)
 188 #define RETURN_CODEVAL(x) do { \
 189         switch (x) { \
 190         case SP_OK: RETURN_CODE(SP_OK); \
 191         case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
 192         case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
 193         case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
 194         case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
 195         default: RETURN_CODE(SP_ERR_FAIL); \
 196         } \
 197 } while (0)
 198 #define RETURN_OK() RETURN_CODE(SP_OK);
 199 #define RETURN_ERROR(err, msg) do { \
 200         DEBUG_ERROR(err, msg); \
 201         return err; \
 202 } while (0)
 203 #define RETURN_FAIL(msg) do { \
 204         DEBUG_FAIL(msg); \
 205         return SP_ERR_FAIL; \
 206 } while (0)
 207 #define RETURN_INT(x) do { \
 208         int _x = x; \
 209         DEBUG_FMT("%s returning %d", __func__, _x); \
 210         return _x; \
 211 } while (0)
 212 #define RETURN_STRING(x) do { \
 213         char *_x = x; \
 214         DEBUG_FMT("%s returning %s", __func__, _x); \
 215         return _x; \
 216 } while (0)
 217 #define RETURN_POINTER(x) do { \
 218         void *_x = x; \
 219         DEBUG_FMT("%s returning %p", __func__, _x); \
 220         return _x; \
 221 } while (0)
 222 #define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0)
 223 #define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0)
 224 #define TRACE(fmt, ...) DEBUG_FMT("%s(" fmt ") called", __func__, __VA_ARGS__)
 225 #define TRACE_VOID() DEBUG_FMT("%s() called", __func__)
 226
 227 #define TRY(x) do { int retval = x; if (retval != SP_OK) RETURN_CODEVAL(retval); } while (0)
 228
 229 SP_PRIV struct sp_port **list_append(struct sp_port **list, const char *portname);
 230
 231 /* OS-specific Helper functions. */
 232 SP_PRIV enum sp_return get_port_details(struct sp_port *port);
 233 SP_PRIV enum sp_return list_ports(struct sp_port ***list);
 234
 235 #endif