config.c

   1 #include <string.h>
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4
   5 #include "netifd.h"
   6 #include "interface.h"
   7
   8 struct uci_context *uci_ctx;
   9 static struct uci_package *uci_network;
  10 bool config_init = false;
  11 static struct blob_buf b;
  12
  13
  14 static void uci_attr_to_blob(struct blob_buf *b, const char *str,
  15                              const char *name, enum blobmsg_type type)
  16 {
  17         char *err;
  18         int intval;
  19
  20         switch (type) {
  21         case BLOBMSG_TYPE_STRING:
  22                 blobmsg_add_string(b, name, str);
  23                 break;
  24         case BLOBMSG_TYPE_BOOL:
  25                 if (!strcmp(str, "true") || !strcmp(str, "1"))
  26                         intval = 1;
  27                 else if (!strcmp(str, "false") || !strcmp(str, "0"))
  28                         intval = 0;
  29                 else
  30                         return;
  31
  32                 blobmsg_add_u8(b, name, intval);
  33                 break;
  34         case BLOBMSG_TYPE_INT32:
  35                 intval = strtol(str, &err, 0);
  36                 if (*err)
  37                         return;
  38
  39                 blobmsg_add_u32(b, name, intval);
  40                 break;
  41         default:
  42                 break;
  43         }
  44 }
  45
  46 static void uci_array_to_blob(struct blob_buf *b, struct uci_option *o,
  47                               enum blobmsg_type type)
  48 {
  49         struct uci_element *e;
  50         char *str, *next, *word;
  51
  52         if (o->type == UCI_TYPE_LIST) {
  53                 uci_foreach_element(&o->v.list, e) {
  54                         uci_attr_to_blob(b, e->name, NULL, type);
  55                 }
  56                 return;
  57         }
  58
  59         str = strdup(o->v.string);
  60         next = str;
  61
  62         while ((word = strsep(&next, " \t")) != NULL) {
  63                 if (!*word)
  64                         continue;
  65
  66                 uci_attr_to_blob(b, word, NULL, type);
  67         }
  68
  69         free(str);
  70 }
  71
  72 static void __uci_to_blob(struct blob_buf *b, struct uci_section *s,
  73                           const struct config_param_list *p)
  74 {
  75         const struct blobmsg_policy *attr;
  76         struct uci_element *e;
  77         struct uci_option *o;
  78         void *array;
  79         int i;
  80
  81         uci_foreach_element(&s->options, e) {
  82                 for (i = 0; i < p->n_params; i++) {
  83                         attr = &p->params[i];
  84                         if (!strcmp(attr->name, e->name))
  85                                 break;
  86                 }
  87
  88                 if (i == p->n_params)
  89                         continue;
  90
  91                 o = uci_to_option(e);
  92
  93                 if (attr->type == BLOBMSG_TYPE_ARRAY) {
  94                         if (!p->info)
  95                                 continue;
  96
  97                         array = blobmsg_open_array(b, attr->name);
  98                         uci_array_to_blob(b, o, p->info[i].type);
  99                         blobmsg_close_array(b, array);
 100                         continue;
 101                 }
 102
 103                 if (o->type == UCI_TYPE_LIST)
 104                         continue;
 105
 106                 uci_attr_to_blob(b, o->v.string, attr->name, attr->type);
 107         }
 108 }
 109
 110 static void uci_to_blob(struct blob_buf *b, struct uci_section *s,
 111                         const struct config_param_list *p)
 112 {
 113         int i;
 114
 115         __uci_to_blob(b, s, p);
 116         for (i = 0; i < p->n_next; i++)
 117                 uci_to_blob(b, s, p->next[i]);
 118 }
 119
 120 static int
 121 config_parse_bridge_interface(struct uci_section *s)
 122 {
 123         char *name;
 124
 125         name = alloca(strlen(s->e.name) + 4);
 126         sprintf(name, "br-%s", s->e.name);
 127         blobmsg_add_string(&b, "name", name);
 128
 129         uci_to_blob(&b, s, bridge_device_type.config_params);
 130         if (!bridge_device_type.create(b.head)) {
 131                 DPRINTF("Failed to create bridge for interface '%s'\n", s->e.name);
 132                 return -EINVAL;
 133         }
 134
 135         blob_buf_init(&b, 0);
 136         blobmsg_add_string(&b, "ifname", name);
 137         return 0;
 138 }
 139
 140 static void
 141 config_parse_interface(struct uci_section *s)
 142 {
 143         const char *type;
 144         DPRINTF("Create interface '%s'\n", s->e.name);
 145
 146         blob_buf_init(&b, 0);
 147
 148         type = uci_lookup_option_string(uci_ctx, s, "type");
 149         if (type && !strcmp(type, "bridge"))
 150                 if (config_parse_bridge_interface(s))
 151                         return;
 152
 153         uci_to_blob(&b, s, &interface_attr_list);
 154         interface_alloc(s->e.name, s, b.head);
 155 }
 156
 157 void
 158 config_init_devices(void)
 159 {
 160         struct uci_element *e;
 161
 162         uci_foreach_element(&uci_network->sections, e) {
 163                 struct uci_section *s = uci_to_section(e);
 164                 const struct device_type *devtype;
 165                 const char *type;
 166
 167                 if (strcmp(s->type, "device") != 0)
 168                         continue;
 169
 170                 blob_buf_init(&b, 0);
 171                 type = uci_lookup_option_string(uci_ctx, s, "type");
 172                 if (type && !strcmp(type, "bridge"))
 173                         devtype = &bridge_device_type;
 174                 else
 175                         devtype = &simple_device_type;
 176
 177                 uci_to_blob(&b, s, devtype->config_params);
 178                 devtype->create(b.head);
 179         }
 180 }
 181
 182 void
 183 config_init_interfaces(const char *name)
 184 {
 185         struct uci_context *ctx;
 186         struct uci_package *p = NULL;
 187         struct uci_element *e;
 188
 189         ctx = uci_alloc_context();
 190         uci_ctx = ctx;
 191
 192         uci_set_confdir(ctx, "./config");
 193
 194         if (uci_load(ctx, "network", &p)) {
 195                 fprintf(stderr, "Failed to load network config\n");
 196                 return;
 197         }
 198
 199         uci_network = p;
 200         config_init = true;
 201
 202         config_init_devices();
 203
 204         uci_foreach_element(&p->sections, e) {
 205                 struct uci_section *s = uci_to_section(e);
 206
 207                 if (name && strcmp(s->e.name, name) != 0)
 208                         continue;
 209
 210                 if (!strcmp(s->type, "interface"))
 211                         config_parse_interface(s);
 212         }
 213         device_free_all();
 214         config_init = false;
 215
 216         interface_start_pending();
 217 }