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 }