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/***
This file is part of systemd.
Copyright (C) 2013 Intel Corporation. All rights reserved.
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include "util.h"
#include "list.h"
#include "dhcp-protocol.h"
#include "sd-dhcp-client.h"
struct sd_dhcp_client {
DHCPState state;
int index;
uint8_t *req_opts;
size_t req_opts_size;
uint32_t last_addr;
};
static const uint8_t default_req_opts[] = {
DHCP_OPTION_SUBNET_MASK,
DHCP_OPTION_ROUTER,
DHCP_OPTION_HOST_NAME,
DHCP_OPTION_DOMAIN_NAME,
DHCP_OPTION_DOMAIN_NAME_SERVER,
DHCP_OPTION_NTP_SERVER,
};
int sd_dhcp_client_set_request_option(sd_dhcp_client *client, uint8_t option)
{
size_t i;
assert_return(client, -EINVAL);
assert_return (client->state == DHCP_STATE_INIT, -EBUSY);
switch(option) {
case DHCP_OPTION_PAD:
case DHCP_OPTION_OVERLOAD:
case DHCP_OPTION_MESSAGE_TYPE:
case DHCP_OPTION_PARAMETER_REQUEST_LIST:
case DHCP_OPTION_END:
return -EINVAL;
default:
break;
}
for (i = 0; i < client->req_opts_size; i++)
if (client->req_opts[i] == option)
return -EEXIST;
if (!GREEDY_REALLOC(client->req_opts, client->req_opts_size,
client->req_opts_size + 1))
return -ENOMEM;
client->req_opts[client->req_opts_size - 1] = option;
return 0;
}
int sd_dhcp_client_set_request_address(sd_dhcp_client *client,
const struct in_addr *last_addr)
{
assert_return(client, -EINVAL);
assert_return(client->state == DHCP_STATE_INIT, -EBUSY);
if (last_addr)
client->last_addr = last_addr->s_addr;
else
client->last_addr = INADDR_ANY;
return 0;
}
int sd_dhcp_client_set_index(sd_dhcp_client *client, int interface_index)
{
assert_return(client, -EINVAL);
assert_return(client->state == DHCP_STATE_INIT, -EBUSY);
assert_return(interface_index >= -1, -EINVAL);
client->index = interface_index;
return 0;
}
sd_dhcp_client *sd_dhcp_client_new(void)
{
sd_dhcp_client *client;
client = new0(sd_dhcp_client, 1);
if (!client)
return NULL;
client->state = DHCP_STATE_INIT;
client->index = -1;
client->req_opts_size = ELEMENTSOF(default_req_opts);
client->req_opts = memdup(default_req_opts, client->req_opts_size);
if (!client->req_opts) {
free(client);
return NULL;
}
return client;
}
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