config.c

   1 #include <string.h>
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4
   5 #include "netifd.h"
   6 #include "interface.h"
   7 #include "proto.h"
   8
   9 struct uci_context *uci_ctx;
  10 static struct uci_package *uci_network;
  11 bool config_init = false;
  12 static struct blob_buf b;
  13 static unsigned int config_version = 1;
  14
  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 = NULL;
  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 uci_to_blob(struct blob_buf *b, struct uci_section *s,
 113                         const struct config_param_list *p)
 114 {
 115         int i;
 116
 117         __uci_to_blob(b, s, p);
 118         for (i = 0; i < p->n_next; i++)
 119                 uci_to_blob(b, s, p->next[i]);
 120 }
 121
 122 static int
 123 config_parse_bridge_interface(struct uci_section *s)
 124 {
 125         char *name;
 126
 127         name = alloca(strlen(s->e.name) + 4);
 128         sprintf(name, "br-%s", s->e.name);
 129         blobmsg_add_string(&b, "name", name);
 130
 131         uci_to_blob(&b, s, bridge_device_type.config_params);
 132         if (!bridge_device_type.create(b.head)) {
 133                 DPRINTF("Failed to create bridge for interface '%s'\n", s->e.name);
 134                 return -EINVAL;
 135         }
 136
 137         blob_buf_init(&b, 0);
 138         blobmsg_add_string(&b, "ifname", name);
 139         return 0;
 140 }
 141
 142 void
 143 config_set_state(struct config_state *state, struct blob_attr *attr)
 144 {
 145         state->data = malloc(blob_pad_len(attr));
 146         if (!state->data)
 147                 return;
 148
 149         memcpy(state->data, attr, blob_pad_len(attr));
 150 }
 151
 152 static void
 153 config_parse_interface(struct uci_section *s)
 154 {
 155         struct interface *iface;
 156         const char *type;
 157
 158         DPRINTF("Create interface '%s'\n", s->e.name);
 159
 160         blob_buf_init(&b, 0);
 161
 162         type = uci_lookup_option_string(uci_ctx, s, "type");
 163         if (type && !strcmp(type, "bridge"))
 164                 if (config_parse_bridge_interface(s))
 165                         return;
 166
 167         uci_to_blob(&b, s, &interface_attr_list);
 168         iface = interface_alloc(s->e.name, b.head);
 169         if (!iface)
 170                 return;
 171
 172         blob_buf_init(&b, 0);
 173         if (iface->proto_handler && iface->proto_handler->config_params)
 174                 uci_to_blob(&b, s, iface->proto_handler->config_params);
 175
 176         proto_init_interface(iface, b.head);
 177         iface->config.version = config_version;
 178 }
 179
 180 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         uci_set_confdir(ctx, "./config");
 216
 217         if (uci_load(ctx, "network", &p)) {
 218                 fprintf(stderr, "Failed to load network config\n");
 219                 return;
 220         }
 221
 222         uci_network = p;
 223         config_init = true;
 224
 225         config_init_devices();
 226
 227         uci_foreach_element(&p->sections, e) {
 228                 struct uci_section *s = uci_to_section(e);
 229
 230                 if (name && strcmp(s->e.name, name) != 0)
 231                         continue;
 232
 233                 if (!strcmp(s->type, "interface"))
 234                         config_parse_interface(s);
 235         }
 236         device_free_unused(NULL);
 237         config_init = false;
 238
 239         interface_start_pending();
 240 }