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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 | #ifdef __linux__ | |
22 | #define _BSD_SOURCE // for timeradd, timersub, timercmp | |
23 | #define _XOPEN_SOURCE 700 // for readlinkat | |
24 | #endif | |
25 | ||
26 | #include <string.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/stat.h> | |
29 | #include <fcntl.h> | |
30 | #include <unistd.h> | |
31 | #include <stdlib.h> | |
32 | #include <errno.h> | |
33 | #include <stdio.h> | |
34 | #include <stdarg.h> | |
35 | #ifdef _WIN32 | |
36 | #include <windows.h> | |
37 | #include <tchar.h> | |
38 | #include <setupapi.h> | |
39 | #include <cfgmgr32.h> | |
40 | #include <usbioctl.h> | |
41 | #else | |
42 | #include <limits.h> | |
43 | #include <termios.h> | |
44 | #include <sys/ioctl.h> | |
45 | #include <sys/time.h> | |
46 | #include <limits.h> | |
47 | #include <poll.h> | |
48 | #endif | |
49 | #ifdef __APPLE__ | |
50 | #include <CoreFoundation/CoreFoundation.h> | |
51 | #include <IOKit/IOKitLib.h> | |
52 | #include <IOKit/serial/IOSerialKeys.h> | |
53 | #include <IOKit/serial/ioss.h> | |
54 | #include <sys/syslimits.h> | |
55 | #endif | |
56 | #ifdef __linux__ | |
57 | #include <dirent.h> | |
58 | #ifndef __ANDROID__ | |
59 | #include "linux/serial.h" | |
60 | #endif | |
61 | #include "linux_termios.h" | |
62 | ||
63 | /* TCGETX/TCSETX is not available everywhere. */ | |
64 | #if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX) | |
65 | #define USE_TERMIOX | |
66 | #endif | |
67 | #endif | |
68 | ||
69 | /* TIOCINQ/TIOCOUTQ is not available everywhere. */ | |
70 | #if !defined(TIOCINQ) && defined(FIONREAD) | |
71 | #define TIOCINQ FIONREAD | |
72 | #endif | |
73 | #if !defined(TIOCOUTQ) && defined(FIONWRITE) | |
74 | #define TIOCOUTQ FIONWRITE | |
75 | #endif | |
76 | ||
77 | /* Non-standard baudrates are not available everywhere. */ | |
78 | #if defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED) | |
79 | #define USE_TERMIOS_SPEED | |
80 | #endif | |
81 | ||
82 | struct sp_port { | |
83 | char *name; | |
84 | char *description; | |
85 | enum sp_transport transport; | |
86 | int usb_bus; | |
87 | int usb_address; | |
88 | int usb_vid; | |
89 | int usb_pid; | |
90 | char *usb_manufacturer; | |
91 | char *usb_product; | |
92 | char *usb_serial; | |
93 | char *bluetooth_address; | |
94 | #ifdef _WIN32 | |
95 | char *usb_path; | |
96 | HANDLE hdl; | |
97 | COMMTIMEOUTS timeouts; | |
98 | OVERLAPPED write_ovl; | |
99 | OVERLAPPED read_ovl; | |
100 | OVERLAPPED wait_ovl; | |
101 | DWORD events; | |
102 | BYTE pending_byte; | |
103 | BOOL writing; | |
104 | #else | |
105 | int fd; | |
106 | #endif | |
107 | }; | |
108 | ||
109 | struct sp_port_config { | |
110 | int baudrate; | |
111 | int bits; | |
112 | enum sp_parity parity; | |
113 | int stopbits; | |
114 | enum sp_rts rts; | |
115 | enum sp_cts cts; | |
116 | enum sp_dtr dtr; | |
117 | enum sp_dsr dsr; | |
118 | enum sp_xonxoff xon_xoff; | |
119 | }; | |
120 | ||
121 | struct port_data { | |
122 | #ifdef _WIN32 | |
123 | DCB dcb; | |
124 | #else | |
125 | struct termios term; | |
126 | int controlbits; | |
127 | int termiox_supported; | |
128 | int rts_flow; | |
129 | int cts_flow; | |
130 | int dtr_flow; | |
131 | int dsr_flow; | |
132 | #endif | |
133 | }; | |
134 | ||
135 | #ifdef _WIN32 | |
136 | typedef HANDLE event_handle; | |
137 | #else | |
138 | typedef int event_handle; | |
139 | #endif | |
140 | ||
141 | /* Standard baud rates. */ | |
142 | #ifdef _WIN32 | |
143 | #define BAUD_TYPE DWORD | |
144 | #define BAUD(n) {CBR_##n, n} | |
145 | #else | |
146 | #define BAUD_TYPE speed_t | |
147 | #define BAUD(n) {B##n, n} | |
148 | #endif | |
149 | ||
150 | struct std_baudrate { | |
151 | BAUD_TYPE index; | |
152 | int value; | |
153 | }; | |
154 | ||
155 | extern const struct std_baudrate std_baudrates[]; | |
156 | ||
157 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) | |
158 | #define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates) | |
159 | ||
160 | extern void (*sp_debug_handler)(const char *format, ...); | |
161 | ||
162 | /* Debug output macros. */ | |
163 | #define DEBUG_FMT(fmt, ...) do { \ | |
164 | if (sp_debug_handler) \ | |
165 | sp_debug_handler(fmt ".\n", __VA_ARGS__); \ | |
166 | } while (0) | |
167 | #define DEBUG(msg) DEBUG_FMT(msg, NULL) | |
168 | #define DEBUG_ERROR(err, msg) DEBUG_FMT("%s returning " #err ": " msg, __func__) | |
169 | #define DEBUG_FAIL(msg) do { \ | |
170 | char *errmsg = sp_last_error_message(); \ | |
171 | DEBUG_FMT("%s returning SP_ERR_FAIL: " msg ": %s", __func__, errmsg); \ | |
172 | sp_free_error_message(errmsg); \ | |
173 | } while (0); | |
174 | #define RETURN() do { \ | |
175 | DEBUG_FMT("%s returning", __func__); \ | |
176 | return; \ | |
177 | } while(0) | |
178 | #define RETURN_CODE(x) do { \ | |
179 | DEBUG_FMT("%s returning " #x, __func__); \ | |
180 | return x; \ | |
181 | } while (0) | |
182 | #define RETURN_CODEVAL(x) do { \ | |
183 | switch (x) { \ | |
184 | case SP_OK: RETURN_CODE(SP_OK); \ | |
185 | case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \ | |
186 | case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \ | |
187 | case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \ | |
188 | case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \ | |
189 | } \ | |
190 | } while (0) | |
191 | #define RETURN_OK() RETURN_CODE(SP_OK); | |
192 | #define RETURN_ERROR(err, msg) do { \ | |
193 | DEBUG_ERROR(err, msg); \ | |
194 | return err; \ | |
195 | } while (0) | |
196 | #define RETURN_FAIL(msg) do { \ | |
197 | DEBUG_FAIL(msg); \ | |
198 | return SP_ERR_FAIL; \ | |
199 | } while (0) | |
200 | #define RETURN_INT(x) do { \ | |
201 | int _x = x; \ | |
202 | DEBUG_FMT("%s returning %d", __func__, _x); \ | |
203 | return _x; \ | |
204 | } while (0) | |
205 | #define RETURN_STRING(x) do { \ | |
206 | char *_x = x; \ | |
207 | DEBUG_FMT("%s returning %s", __func__, _x); \ | |
208 | return _x; \ | |
209 | } while (0) | |
210 | #define RETURN_POINTER(x) do { \ | |
211 | void *_x = x; \ | |
212 | DEBUG_FMT("%s returning %p", __func__, _x); \ | |
213 | return _x; \ | |
214 | } while (0) | |
215 | #define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0) | |
216 | #define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0) | |
217 | #define TRACE(fmt, ...) DEBUG_FMT("%s(" fmt ") called", __func__, __VA_ARGS__) | |
218 | #define TRACE_VOID() DEBUG_FMT("%s() called", __func__) | |
219 | ||
220 | #define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0) | |
221 | ||
222 | SP_PRIV struct sp_port **list_append(struct sp_port **list, const char *portname); | |
223 | ||
224 | /* OS-specific Helper functions. */ | |
225 | SP_PRIV enum sp_return get_port_details(struct sp_port *port); | |
226 | SP_PRIV enum sp_return list_ports(struct sp_port ***list); |