config.c

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