BadVPN – Blame information for rev 1
?pathlinks?
Rev | Author | Line No. | Line |
---|---|---|---|
1 | office | 1 | /** |
2 | * @file net_backend_rfkill.c |
||
3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
||
4 | * |
||
5 | * @section LICENSE |
||
6 | * |
||
7 | * Redistribution and use in source and binary forms, with or without |
||
8 | * modification, are permitted provided that the following conditions are met: |
||
9 | * 1. Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * 2. Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
13 | * documentation and/or other materials provided with the distribution. |
||
14 | * 3. Neither the name of the author nor the |
||
15 | * names of its contributors may be used to endorse or promote products |
||
16 | * derived from this software without specific prior written permission. |
||
17 | * |
||
18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
||
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
||
20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
||
21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
||
22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
||
23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
||
24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
||
25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
||
27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
28 | * |
||
29 | * @section DESCRIPTION |
||
30 | * |
||
31 | * Rfkill monitoring module. |
||
32 | * |
||
33 | * Synopsis: net.backend.rfkill(string type, string name) |
||
34 | * Arguments: |
||
35 | * type - method of determining the index of the rfkill device. "index" for |
||
36 | * rfkill device index, "wlan" for wireless device. Be aware that, for |
||
37 | * the wireless device method, the index is resloved at initialization, |
||
38 | * and no attempt is made to refresh it if the device goes away. In other |
||
39 | * words, you should probably put a "net.backend.waitdevice" statement |
||
40 | * in front of the rfkill statement. |
||
41 | * name - rfkill index or wireless device name |
||
42 | */ |
||
43 | |||
44 | #include <stdlib.h> |
||
45 | #include <string.h> |
||
46 | #include <inttypes.h> |
||
47 | #include <stdio.h> |
||
48 | #include <sys/types.h> |
||
49 | #include <dirent.h> |
||
50 | |||
51 | #include <misc/string_begins_with.h> |
||
52 | #include <ncd/extra/NCDRfkillMonitor.h> |
||
53 | |||
54 | #include <ncd/module_common.h> |
||
55 | |||
56 | #include <generated/blog_channel_ncd_net_backend_rfkill.h> |
||
57 | |||
58 | struct instance { |
||
59 | NCDModuleInst *i; |
||
60 | uint32_t index; |
||
61 | NCDRfkillMonitor monitor; |
||
62 | int up; |
||
63 | }; |
||
64 | |||
65 | static int find_wlan_rfill (const char *ifname, uint32_t *out_index) |
||
66 | { |
||
67 | char ieee_path[100]; |
||
68 | snprintf(ieee_path, sizeof(ieee_path), "/sys/class/net/%s/../../ieee80211", ifname); |
||
69 | |||
70 | int res = 0; |
||
71 | |||
72 | DIR *d = opendir(ieee_path); |
||
73 | if (!d) { |
||
74 | goto fail0; |
||
75 | } |
||
76 | |||
77 | struct dirent *e; |
||
78 | while (e = readdir(d)) { |
||
79 | if (!string_begins_with(e->d_name, "phy")) { |
||
80 | continue; |
||
81 | } |
||
82 | |||
83 | char phy_path[150]; |
||
84 | snprintf(phy_path, sizeof(phy_path), "%s/%s", ieee_path, e->d_name); |
||
85 | |||
86 | DIR *d2 = opendir(phy_path); |
||
87 | if (!d2) { |
||
88 | continue; |
||
89 | } |
||
90 | |||
91 | struct dirent *e2; |
||
92 | while (e2 = readdir(d2)) { |
||
93 | int index_pos; |
||
94 | if (!(index_pos = string_begins_with(e2->d_name, "rfkill"))) { |
||
95 | continue; |
||
96 | } |
||
97 | |||
98 | uint32_t index; |
||
99 | if (sscanf(e2->d_name + index_pos, "%"SCNu32, &index) != 1) { |
||
100 | continue; |
||
101 | } |
||
102 | |||
103 | res = 1; |
||
104 | *out_index = index; |
||
105 | } |
||
106 | |||
107 | closedir(d2); |
||
108 | } |
||
109 | |||
110 | closedir(d); |
||
111 | fail0: |
||
112 | return res; |
||
113 | } |
||
114 | |||
115 | static void monitor_handler (struct instance *o, struct rfkill_event event) |
||
116 | { |
||
117 | if (event.idx != o->index) { |
||
118 | return; |
||
119 | } |
||
120 | |||
121 | int was_up = o->up; |
||
122 | o->up = (event.op != RFKILL_OP_DEL && !event.soft && !event.hard); |
||
123 | |||
124 | if (o->up && !was_up) { |
||
125 | NCDModuleInst_Backend_Up(o->i); |
||
126 | } |
||
127 | else if (!o->up && was_up) { |
||
128 | NCDModuleInst_Backend_Down(o->i); |
||
129 | } |
||
130 | } |
||
131 | |||
132 | static void func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params) |
||
133 | { |
||
134 | struct instance *o = vo; |
||
135 | o->i = i; |
||
136 | |||
137 | // check arguments |
||
138 | NCDValRef type_arg; |
||
139 | NCDValRef name_arg; |
||
140 | if (!NCDVal_ListRead(params->args, 2, &type_arg, &name_arg)) { |
||
141 | ModuleLog(o->i, BLOG_ERROR, "wrong arity"); |
||
142 | goto fail0; |
||
143 | } |
||
144 | if (!NCDVal_IsString(type_arg) || !NCDVal_IsStringNoNulls(name_arg)) { |
||
145 | ModuleLog(o->i, BLOG_ERROR, "wrong type"); |
||
146 | goto fail0; |
||
147 | } |
||
148 | |||
149 | // null terminate name |
||
150 | NCDValNullTermString name_nts; |
||
151 | if (!NCDVal_StringNullTerminate(name_arg, &name_nts)) { |
||
152 | ModuleLog(o->i, BLOG_ERROR, "NCDVal_StringNullTerminate failed"); |
||
153 | goto fail0; |
||
154 | } |
||
155 | |||
156 | if (NCDVal_StringEquals(type_arg, "index")) { |
||
157 | if (sscanf(name_nts.data, "%"SCNu32, &o->index) != 1) { |
||
158 | ModuleLog(o->i, BLOG_ERROR, "wrong index argument"); |
||
159 | goto fail1; |
||
160 | } |
||
161 | } |
||
162 | else if (NCDVal_StringEquals(type_arg, "wlan")) { |
||
163 | if (!find_wlan_rfill(name_nts.data, &o->index)) { |
||
164 | ModuleLog(o->i, BLOG_ERROR, "failed to find rfkill for wlan interface"); |
||
165 | goto fail1; |
||
166 | } |
||
167 | } |
||
168 | else { |
||
169 | ModuleLog(o->i, BLOG_ERROR, "unknown type argument"); |
||
170 | goto fail1; |
||
171 | } |
||
172 | |||
173 | // init monitor |
||
174 | if (!NCDRfkillMonitor_Init(&o->monitor, o->i->params->iparams->reactor, (NCDRfkillMonitor_handler)monitor_handler, o)) { |
||
175 | ModuleLog(o->i, BLOG_ERROR, "monitor failed"); |
||
176 | goto fail1; |
||
177 | } |
||
178 | |||
179 | // set not up |
||
180 | o->up = 0; |
||
181 | |||
182 | // free name nts |
||
183 | NCDValNullTermString_Free(&name_nts); |
||
184 | return; |
||
185 | |||
186 | fail1: |
||
187 | NCDValNullTermString_Free(&name_nts); |
||
188 | fail0: |
||
189 | NCDModuleInst_Backend_DeadError(i); |
||
190 | } |
||
191 | |||
192 | static void func_die (void *vo) |
||
193 | { |
||
194 | struct instance *o = vo; |
||
195 | |||
196 | // free monitor |
||
197 | NCDRfkillMonitor_Free(&o->monitor); |
||
198 | |||
199 | NCDModuleInst_Backend_Dead(o->i); |
||
200 | } |
||
201 | |||
202 | static struct NCDModule modules[] = { |
||
203 | { |
||
204 | .type = "net.backend.rfkill", |
||
205 | .func_new2 = func_new, |
||
206 | .func_die = func_die, |
||
207 | .alloc_size = sizeof(struct instance) |
||
208 | }, { |
||
209 | .type = NULL |
||
210 | } |
||
211 | }; |
||
212 | |||
213 | const struct NCDModuleGroup ncdmodule_net_backend_rfkill = { |
||
214 | .modules = modules |
||
215 | }; |