BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file NCDRfkillMonitor.c |
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3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
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4 | * |
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5 | * @section LICENSE |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions are met: |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * 3. Neither the name of the author nor the |
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15 | * names of its contributors may be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |||
30 | #include <unistd.h> |
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31 | #include <sys/types.h> |
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32 | #include <sys/stat.h> |
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33 | #include <fcntl.h> |
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34 | |||
35 | #include <misc/debug.h> |
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36 | #include <misc/nonblocking.h> |
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37 | #include <base/BLog.h> |
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38 | |||
39 | #include "NCDRfkillMonitor.h" |
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40 | |||
41 | #include <generated/blog_channel_NCDRfkillMonitor.h> |
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42 | |||
43 | #define RFKILL_DEVICE_NODE "/dev/rfkill" |
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44 | |||
45 | static void rfkill_fd_handler (NCDRfkillMonitor *o, int events); |
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46 | |||
47 | void rfkill_fd_handler (NCDRfkillMonitor *o, int events) |
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48 | { |
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49 | DebugObject_Access(&o->d_obj); |
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50 | |||
51 | // read from netlink fd |
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52 | struct rfkill_event event; |
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53 | int len = read(o->rfkill_fd, &event, sizeof(event)); |
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54 | if (len < 0) { |
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55 | BLog(BLOG_ERROR, "read failed"); |
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56 | return; |
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57 | } |
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58 | if (len != sizeof(event)) { |
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59 | BLog(BLOG_ERROR, "read returned wrong length"); |
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60 | return; |
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61 | } |
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62 | |||
63 | // call handler |
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64 | o->handler(o->user, event); |
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65 | return; |
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66 | } |
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67 | |||
68 | int NCDRfkillMonitor_Init (NCDRfkillMonitor *o, BReactor *reactor, NCDRfkillMonitor_handler handler, void *user) |
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69 | { |
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70 | // init arguments |
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71 | o->reactor = reactor; |
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72 | o->handler = handler; |
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73 | o->user = user; |
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74 | |||
75 | // open rfkill |
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76 | if ((o->rfkill_fd = open(RFKILL_DEVICE_NODE, O_RDONLY)) < 0) { |
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77 | BLog(BLOG_ERROR, "open failed"); |
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78 | goto fail0; |
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79 | } |
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80 | |||
81 | // set fd non-blocking |
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82 | if (!badvpn_set_nonblocking(o->rfkill_fd)) { |
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83 | BLog(BLOG_ERROR, "badvpn_set_nonblocking failed"); |
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84 | goto fail1; |
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85 | } |
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86 | |||
87 | // init BFileDescriptor |
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88 | BFileDescriptor_Init(&o->bfd, o->rfkill_fd, (BFileDescriptor_handler)rfkill_fd_handler, o); |
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89 | if (!BReactor_AddFileDescriptor(o->reactor, &o->bfd)) { |
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90 | BLog(BLOG_ERROR, "BReactor_AddFileDescriptor failed"); |
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91 | goto fail1; |
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92 | } |
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93 | BReactor_SetFileDescriptorEvents(o->reactor, &o->bfd, BREACTOR_READ); |
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94 | |||
95 | DebugObject_Init(&o->d_obj); |
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96 | return 1; |
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97 | |||
98 | fail1: |
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99 | if (close(o->rfkill_fd) < 0) { |
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100 | BLog(BLOG_ERROR, "close failed"); |
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101 | } |
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102 | fail0: |
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103 | return 0; |
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104 | } |
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105 | |||
106 | void NCDRfkillMonitor_Free (NCDRfkillMonitor *o) |
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107 | { |
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108 | DebugObject_Free(&o->d_obj); |
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109 | |||
110 | // free BFileDescriptor |
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111 | BReactor_RemoveFileDescriptor(o->reactor, &o->bfd); |
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112 | |||
113 | // close rfkill |
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114 | if (close(o->rfkill_fd) < 0) { |
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115 | BLog(BLOG_ERROR, "close failed"); |
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116 | } |
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117 | } |