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         return proto_apply_static_ip_settings(state->proto.iface, state->config) == 0;
  37 }
  38
  39 static int
  40 static_handler(struct interface_proto_state *proto,
  41                enum interface_proto_cmd cmd, bool force)
  42 {
  43         struct static_proto_state *state;
  44         int ret = 0;
  45
  46         state = container_of(proto, struct static_proto_state, proto);
  47
  48         switch (cmd) {
  49         case PROTO_CMD_SETUP:
  50                 if (!static_proto_setup(state))
  51                         return -1;
  52
  53                 break;
  54         case PROTO_CMD_TEARDOWN:
  55         case PROTO_CMD_RENEW:
  56                 break;
  57         }
  58
  59         return ret;
  60 }
  61
  62 static void
  63 static_free(struct interface_proto_state *proto)
  64 {
  65         struct static_proto_state *state;
  66
  67         state = container_of(proto, struct static_proto_state, proto);
  68         free(state->config);
  69         free(state);
  70 }
  71
  72 static struct interface_proto_state *
  73 static_attach(const struct proto_handler *h, struct interface *iface,
  74               struct blob_attr *attr)
  75 {
  76         struct static_proto_state *state;
  77
  78         state = calloc(1, sizeof(*state));
  79         if (!state)
  80                 return NULL;
  81
  82         state->config = malloc(blob_pad_len(attr));
  83         if (!state->config)
  84                 goto error;
  85
  86         memcpy(state->config, attr, blob_pad_len(attr));
  87         state->proto.free = static_free;
  88         state->proto.cb = static_handler;
  89
  90         return &state->proto;
  91
  92 error:
  93         free(state);
  94         return NULL;
  95 }
  96
  97 static struct proto_handler static_proto = {
  98         .name = "static",
  99         .flags = PROTO_FLAG_IMMEDIATE,
 100         .config_params = &proto_ip_attr,
 101         .attach = static_attach,
 102 };
 103
 104 static void __init
 105 static_proto_init(void)
 106 {
 107         add_proto_handler(&static_proto);
 108 }