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