proto-static.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17
  18 #include <arpa/inet.h>
  19 #include <netinet/in.h>
  20
  21 #include "netifd.h"
  22 #include "interface.h"
  23 #include "interface-ip.h"
  24 #include "proto.h"
  25 #include "system.h"
  26
  27 struct static_proto_state {
  28         struct interface_proto_state proto;
  29
  30         struct blob_attr *config;
  31 };
  32
  33 static bool
  34 static_proto_setup(struct static_proto_state *state)
  35 {
  36         struct interface *iface = state->proto.iface;
  37         struct device *dev = iface->main_dev.dev;
  38
  39         interface_set_l3_dev(iface, dev);
  40         return proto_apply_static_ip_settings(state->proto.iface, state->config) == 0;
  41 }
  42
  43 static int
  44 static_handler(struct interface_proto_state *proto,
  45                enum interface_proto_cmd cmd, bool force)
  46 {
  47         struct static_proto_state *state;
  48         int ret = 0;
  49
  50         state = container_of(proto, struct static_proto_state, proto);
  51
  52         switch (cmd) {
  53         case PROTO_CMD_SETUP:
  54                 if (!static_proto_setup(state))
  55                         return -1;
  56
  57                 break;
  58         case PROTO_CMD_TEARDOWN:
  59         case PROTO_CMD_RENEW:
  60                 break;
  61         }
  62
  63         return ret;
  64 }
  65
  66 static void
  67 static_free(struct interface_proto_state *proto)
  68 {
  69         struct static_proto_state *state;
  70
  71         state = container_of(proto, struct static_proto_state, proto);
  72         free(state->config);
  73         free(state);
  74 }
  75
  76 static struct interface_proto_state *
  77 static_attach(const struct proto_handler *h, struct interface *iface,
  78               struct blob_attr *attr)
  79 {
  80         struct static_proto_state *state;
  81
  82         state = calloc(1, sizeof(*state));
  83         if (!state)
  84                 return NULL;
  85
  86         state->config = malloc(blob_pad_len(attr));
  87         if (!state->config)
  88                 goto error;
  89
  90         memcpy(state->config, attr, blob_pad_len(attr));
  91         state->proto.free = static_free;
  92         state->proto.cb = static_handler;
  93
  94         return &state->proto;
  95
  96 error:
  97         free(state);
  98         return NULL;
  99 }
 100
 101 static struct proto_handler static_proto = {
 102         .name = "static",
 103         .flags = PROTO_FLAG_IMMEDIATE |
 104                  PROTO_FLAG_FORCE_LINK_DEFAULT,
 105         .config_params = &proto_ip_attr,
 106         .attach = static_attach,
 107 };
 108
 109 static void __init
 110 static_proto_init(void)
 111 {
 112         add_proto_handler(&static_proto);
 113 }