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1 office 1 /**
2 * @file net_up.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 * Network interface up and down module.
32 *
33 * Synopsis: net.up(string ifname)
34 * Description: Sets a network interface up on initialization and down on
35 * deinitialization.
36 */
37  
38 #include <stdlib.h>
39  
40 #include <ncd/extra/NCDIfConfig.h>
41  
42 #include <ncd/module_common.h>
43  
44 #include <generated/blog_channel_ncd_net_up.h>
45  
46 struct instance {
47 NCDModuleInst *i;
48 NCDValNullTermString ifname_nts;
49 };
50  
51 static void func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
52 {
53 struct instance *o = vo;
54 o->i = i;
55  
56 // read arguments
57 NCDValRef ifname_arg;
58 if (!NCDVal_ListRead(params->args, 1, &ifname_arg)) {
59 ModuleLog(o->i, BLOG_ERROR, "wrong arity");
60 goto fail0;
61 }
62 if (!NCDVal_IsStringNoNulls(ifname_arg)) {
63 ModuleLog(o->i, BLOG_ERROR, "wrong type");
64 goto fail0;
65 }
66  
67 // null terminate ifname
68 if (!NCDVal_StringNullTerminate(ifname_arg, &o->ifname_nts)) {
69 ModuleLog(i, BLOG_ERROR, "NCDVal_StringNullTerminate failed");
70 goto fail0;
71 }
72  
73 // set interface up
74 if (!NCDIfConfig_set_up(o->ifname_nts.data)) {
75 ModuleLog(o->i, BLOG_ERROR, "failed to set interface up");
76 goto fail1;
77 }
78  
79 // signal up
80 NCDModuleInst_Backend_Up(o->i);
81  
82 return;
83  
84 fail1:
85 NCDValNullTermString_Free(&o->ifname_nts);
86 fail0:
87 NCDModuleInst_Backend_DeadError(i);
88 }
89  
90 static void func_die (void *vo)
91 {
92 struct instance *o = vo;
93  
94 // set interface down
95 if (!NCDIfConfig_set_down(o->ifname_nts.data)) {
96 ModuleLog(o->i, BLOG_ERROR, "failed to set interface down");
97 }
98  
99 // free ifname nts
100 NCDValNullTermString_Free(&o->ifname_nts);
101  
102 NCDModuleInst_Backend_Dead(o->i);
103 }
104  
105 static struct NCDModule modules[] = {
106 {
107 .type = "net.up",
108 .func_new2 = func_new,
109 .func_die = func_die,
110 .alloc_size = sizeof(struct instance)
111 }, {
112 .type = NULL
113 }
114 };
115  
116 const struct NCDModuleGroup ncdmodule_net_up = {
117 .modules = modules
118 };