Mercurial > remote-gamepad-server

annotate uinput.c @ 7:6aa40a25de22

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Remove debug and add an assert on the size of the received struct.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Tue, 18 Aug 2015 02:08:29 +0100
parents eafcd170dc6d
children dec5fe6cd0d0
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1 #include "uinput.h"
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2 #include "ds.h"
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3 #include "service.h"
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5 #include <stdio.h>
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6 #include <fcntl.h>
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7 #include <string.h>
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8 #include <sys/ioctl.h>
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9 #include <unistd.h>
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10 #include <stdbool.h>
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12
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13 #define DS_NAME "Nintendo 3DS"
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15 /* Not found these values... but it's not important! */
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16 #define DS_VENDOR 0xdead
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17 #define DS_PRODUCT 0xbeef
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18 #define DS_VERSION 0x00
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22 /*
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23 Create a new uinput device
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24 Returns: file descriptor (-1 if error)
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25 */
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26 int init_uinput_device(void){
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27 struct uinput_user_dev dev;
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28 int fd = -1;
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30 if(uinput_dev == NULL){
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31 fd = open("/dev/uinput", O_RDWR);
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33 if(fd < 0)
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34 fd = open("/dev/misc/uinput", O_RDWR);
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36 if(fd < 0)
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37 fd = open("/dev/input/uinput", O_RDWR);
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38 }
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39 else fd = open(uinput_dev, O_RDWR); //from xml
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41 if(fd < 0){
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42 perror("open");
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43 fprintf(stderr, " [%d] Unable to open uinput device ; hint: 'modprobe uinput' ?!\n", curdev);
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44 return -1;
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45 }
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49 memset(&dev, 0, sizeof(dev));
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50 strncpy(dev.name, DS_NAME, UINPUT_MAX_NAME_SIZE);
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51 dev.id.bustype = 0;
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52 dev.id.vendor = DS_VENDOR;
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53 dev.id.product = DS_PRODUCT;
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54 dev.id.version = DS_VERSION;
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55
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56 // Circle pad
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57 dev.absmax[ABS_X] = PAD_MAX;
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58 dev.absmin[ABS_X] = -PAD_MAX;
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59 dev.absfuzz[ABS_X] = 4;
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60 dev.absflat[ABS_X] = 2;
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62 dev.absmax[ABS_Y] = PAD_MAX;
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63 dev.absmin[ABS_Y] = -PAD_MAX;
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64 dev.absfuzz[ABS_Y] = 4;
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65 dev.absflat[ABS_Y] = 2;
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67
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68 // C pad
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69 dev.absmax[ABS_RX] = PAD_MAX;
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70 dev.absmin[ABS_RX] = -PAD_MAX;
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71 dev.absfuzz[ABS_RX] = 4;
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72 dev.absflat[ABS_RX] = 2;
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73
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74 dev.absmax[ABS_RY] = PAD_MAX;
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75 dev.absmin[ABS_RY] = -PAD_MAX;
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76 dev.absfuzz[ABS_RY] = 4;
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77 dev.absflat[ABS_RY] = 2;
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80 if(write(fd, &dev, sizeof(dev)) < (ssize_t)sizeof(dev)){
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81 fprintf(stderr, " [%d] Registering device at uinput failed\n", curdev);
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82 return -1;
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83 }
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85 /* Keys [01] (found in <linux/input.h>) */
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86 if( ioctl(fd, UI_SET_EVBIT, EV_KEY) ) return -1;
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87 if( ioctl(fd, UI_SET_KEYBIT, BTN_A) ) return -1;
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88 if( ioctl(fd, UI_SET_KEYBIT, BTN_B) ) return -1;
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89 if( ioctl(fd, UI_SET_KEYBIT, BTN_X) ) return -1;
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90 if( ioctl(fd, UI_SET_KEYBIT, BTN_Y) ) return -1;
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91 if( ioctl(fd, UI_SET_KEYBIT, BTN_TL) ) return -1;
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92 if( ioctl(fd, UI_SET_KEYBIT, BTN_TR) ) return -1;
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93 if( ioctl(fd, UI_SET_KEYBIT, BTN_TL2) ) return -1;
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94 if( ioctl(fd, UI_SET_KEYBIT, BTN_TR2) ) return -1;
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95 if( ioctl(fd, UI_SET_KEYBIT, BTN_START) ) return -1;
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96 if( ioctl(fd, UI_SET_KEYBIT, BTN_SELECT)) return -1;
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97 if( ioctl(fd, UI_SET_KEYBIT, BTN_DPAD_UP)) return -1;
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98 if( ioctl(fd, UI_SET_KEYBIT, BTN_DPAD_DOWN)) return -1;
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99 if( ioctl(fd, UI_SET_KEYBIT, BTN_DPAD_LEFT)) return -1;
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100 if( ioctl(fd, UI_SET_KEYBIT, BTN_DPAD_RIGHT)) return -1;
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101
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102 /* D-Pad [-0xFFFF - 0xFFFF] */
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103 if( ioctl(fd, UI_SET_EVBIT, EV_ABS) ) return -1;
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104 if( ioctl(fd, UI_SET_ABSBIT, ABS_X) ) return -1;
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105 if( ioctl(fd, UI_SET_ABSBIT, ABS_Y) ) return -1;
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106 if( ioctl(fd, UI_SET_ABSBIT, ABS_RX) ) return -1;
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107 if( ioctl(fd, UI_SET_ABSBIT, ABS_RY) ) return -1;
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109
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110 /* Register device */
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111 if( ioctl(fd, UI_DEV_CREATE) ) return -1;
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112
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113 return fd;
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114 }
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115
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116
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117 /*
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118 Send an event into the uinput device
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119 Returns: TRUE, FALSE
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120 */
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121 int do_uinput(int fd, unsigned short key, int pressed, unsigned short event_type){
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122 struct input_event event;
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123 memset(&event, 0 , sizeof(event));
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124
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125 event.type = event_type;
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126 event.code = key;
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127 event.value = pressed;
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128
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129 if(write(fd,&event,sizeof(event)) != sizeof(event)){
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130 fprintf(stderr, " [%d] Writing event to uinput driver failed ; Aborting\n", curdev);
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131 return false;
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132 }
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133 return true;
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134 }
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135
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136
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137 /*
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138 Synchonize events
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139 */
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140 void flush_uinput(int fd){
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141 struct input_event event;
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142 memset(&event, 0 , sizeof(event));
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143
0
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144 event.type = EV_SYN;
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145 event.code = SYN_REPORT;
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146
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147 if(fd){
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148 if(write(fd, &event, sizeof(event) != sizeof(event)))
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149 fprintf(stderr, " [%d] Flushing uinput failed\n", curdev);
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150 }
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151 }
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152
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153
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154
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155
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156