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