implement uci-to-blobmsg conversion as an abstraction between uci and the rest of...
[project/netifd.git] / config.c
1 #include <string.h>
2 #include <stdlib.h>
3 #include <stdio.h>
4
5 #include <sys/types.h>
6 #include <sys/socket.h>
7 #include <net/ethernet.h>
8
9 #include "netifd.h"
10 #include "interface.h"
11
12 struct uci_context *uci_ctx;
13 static struct uci_package *uci_network;
14 bool config_init = false;
15
16 static void uci_attr_to_blob(struct blob_buf *b, const char *str,
17                              const char *name, enum blobmsg_type type)
18 {
19         char *err;
20         int intval;
21
22         switch (type) {
23         case BLOBMSG_TYPE_STRING:
24                 blobmsg_add_string(b, name, str);
25                 break;
26         case BLOBMSG_TYPE_BOOL:
27                 if (!strcmp(str, "true") || !strcmp(str, "1"))
28                         intval = 1;
29                 else if (!strcmp(str, "false") || !strcmp(str, "0"))
30                         intval = 0;
31                 else
32                         return;
33
34                 blobmsg_add_u8(b, name, intval);
35                 break;
36         case BLOBMSG_TYPE_INT32:
37                 intval = strtol(str, &err, 0);
38                 if (*err)
39                         return;
40
41                 blobmsg_add_u32(b, name, intval);
42                 break;
43         default:
44                 break;
45         }
46 }
47
48 static void uci_array_to_blob(struct blob_buf *b, struct uci_option *o,
49                               enum blobmsg_type type)
50 {
51         struct uci_element *e;
52         char *str, *next, *word;
53
54         if (o->type == UCI_TYPE_LIST) {
55                 uci_foreach_element(&o->v.list, e) {
56                         uci_attr_to_blob(b, e->name, NULL, type);
57                 }
58                 return;
59         }
60
61         str = strdup(o->v.string);
62         next = str;
63
64         while ((word = strsep(&next, " \t")) != NULL) {
65                 if (!*word)
66                         continue;
67
68                 uci_attr_to_blob(b, word, NULL, type);
69         }
70
71         free(str);
72 }
73
74 static void uci_to_blob(struct blob_buf *b, struct uci_section *s,
75                         const struct config_param_list *p)
76 {
77         const struct blobmsg_policy *attr;
78         struct uci_element *e;
79         struct uci_option *o;
80         void *array;
81         int i;
82
83         uci_foreach_element(&s->options, e) {
84                 for (i = 0; i < p->n_params; i++) {
85                         attr = &p->params[i];
86                         if (!strcmp(attr->name, e->name))
87                                 break;
88                 }
89
90                 if (i == p->n_params)
91                         continue;
92
93                 o = uci_to_option(e);
94
95                 if (attr->type == BLOBMSG_TYPE_ARRAY) {
96                         if (!p->info)
97                                 continue;
98
99                         array = blobmsg_open_array(b, attr->name);
100                         uci_array_to_blob(b, o, p->info[i].type);
101                         blobmsg_close_array(b, array);
102                         continue;
103                 }
104
105                 if (o->type == UCI_TYPE_LIST)
106                         continue;
107
108                 uci_attr_to_blob(b, o->v.string, attr->name, attr->type);
109         }
110 }
111
112 static void
113 config_parse_interface(struct uci_section *s)
114 {
115         struct blob_buf b = {};
116
117         DPRINTF("Create interface '%s'\n", s->e.name);
118
119         blob_buf_init(&b, 0);
120         uci_to_blob(&b, s, &interface_attr_list);
121         alloc_interface(s->e.name, s, b.head);
122 }
123
124 enum {
125         SDEV_NAME,
126         SDEV_TYPE,
127         SDEV_MTU,
128         SDEV_MACADDR,
129         SDEV_TXQUEUELEN,
130         __SDEV_MAX,
131 };
132
133 static const struct uci_parse_option dev_opts[__SDEV_MAX] = {
134         [SDEV_NAME] = { "name", UCI_TYPE_STRING },
135         [SDEV_TYPE] = { "type", UCI_TYPE_STRING },
136         [SDEV_MTU] = { "mtu", UCI_TYPE_STRING },
137         [SDEV_MACADDR] = { "macaddr", UCI_TYPE_STRING },
138         [SDEV_TXQUEUELEN] = { "txqueuelen", UCI_TYPE_STRING },
139 };
140
141 static bool
142 add_int_option(struct uci_option *o, unsigned int *dest)
143 {
144         char *error = NULL;
145         int val;
146
147         if (!o)
148                 return false;
149
150         val = strtoul(o->v.string, &error, 0);
151         if (error && *error)
152                 return false;
153
154         *dest = val;
155         return true;
156 }
157
158 static void
159 config_init_device_settings(struct device *dev, struct uci_option **opts)
160 {
161         struct ether_addr *ea;
162
163         dev->flags = 0;
164
165         if (add_int_option(opts[SDEV_MTU], &dev->mtu))
166                 dev->flags |= DEV_OPT_MTU;
167
168         if (add_int_option(opts[SDEV_TXQUEUELEN], &dev->txqueuelen))
169                 dev->flags |= DEV_OPT_TXQUEUELEN;
170
171         if (opts[SDEV_MACADDR]) {
172                 ea = ether_aton(opts[SDEV_MACADDR]->v.string);
173                 if (ea) {
174                         memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
175                         dev->flags |= DEV_OPT_MACADDR;
176                 }
177         }
178 }
179
180 void
181 config_init_devices(void)
182 {
183         struct uci_element *e;
184         struct device *dev;
185         struct uci_option *opts[__SDEV_MAX];
186
187         uci_foreach_element(&uci_network->sections, e) {
188                 struct uci_section *s = uci_to_section(e);
189
190                 if (strcmp(s->type, "device") != 0)
191                         continue;
192
193                 uci_parse_section(s, dev_opts, __SDEV_MAX, opts);
194                 if (!opts[SDEV_NAME])
195                         continue;
196
197                 dev = NULL;
198                 if (opts[SDEV_TYPE]) {
199                         const char *type = opts[SDEV_TYPE]->v.string;
200
201                         if (!strcmp(type, "bridge"))
202                                 dev = bridge_create(opts[SDEV_NAME]->v.string, s);
203                 } else {
204                         dev = get_device(opts[SDEV_NAME]->v.string, true);
205                 }
206
207                 if (!dev)
208                         continue;
209
210                 config_init_device_settings(dev, opts);
211                 dev->config_hash = uci_hash_options(opts, __SDEV_MAX);
212         }
213 }
214
215 void
216 config_init_interfaces(const char *name)
217 {
218         struct uci_context *ctx;
219         struct uci_package *p = NULL;
220         struct uci_element *e;
221
222         ctx = uci_alloc_context();
223         uci_ctx = ctx;
224
225         uci_set_confdir(ctx, "./config");
226
227         if (uci_load(ctx, "network", &p)) {
228                 fprintf(stderr, "Failed to load network config\n");
229                 return;
230         }
231
232         uci_network = p;
233         config_init = true;
234
235         config_init_devices();
236
237         uci_foreach_element(&p->sections, e) {
238                 struct uci_section *s = uci_to_section(e);
239
240                 if (name && strcmp(s->e.name, name) != 0)
241                         continue;
242
243                 if (!strcmp(s->type, "interface"))
244                         config_parse_interface(s);
245         }
246         cleanup_devices();
247         config_init = false;
248
249         start_pending_interfaces();
250 }