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