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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include "util.h"
#include "socket-util.h"
#include "dhcp-protocol.h"
#include "dhcp-internal.h"
#include "sd-dhcp-client.h"
static struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
};
static int test_fd[2];
static void test_request_basic(sd_event *e)
{
sd_dhcp_client *client;
client = sd_dhcp_client_new(e);
assert(client);
assert(sd_dhcp_client_set_request_option(NULL, 0) == -EINVAL);
assert(sd_dhcp_client_set_request_address(NULL, NULL) == -EINVAL);
assert(sd_dhcp_client_set_index(NULL, 0) == -EINVAL);
assert(sd_dhcp_client_set_index(client, 15) == 0);
assert(sd_dhcp_client_set_index(client, -42) == -EINVAL);
assert(sd_dhcp_client_set_index(client, -1) == 0);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_SUBNET_MASK) == -EEXIST);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_ROUTER) == -EEXIST);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_HOST_NAME) == -EEXIST);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_DOMAIN_NAME) == -EEXIST);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_DOMAIN_NAME_SERVER)
== -EEXIST);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_NTP_SERVER) == -EEXIST);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_PAD) == -EINVAL);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_END) == -EINVAL);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_MESSAGE_TYPE) == -EINVAL);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_OVERLOAD) == -EINVAL);
assert(sd_dhcp_client_set_request_option(client,
DHCP_OPTION_PARAMETER_REQUEST_LIST)
== -EINVAL);
assert(sd_dhcp_client_set_request_option(client, 33) == 0);
assert(sd_dhcp_client_set_request_option(client, 33) == -EEXIST);
assert(sd_dhcp_client_set_request_option(client, 44) == 0);
}
static uint16_t client_checksum(void *buf, int len)
{
uint32_t sum;
uint16_t *check;
int i;
uint8_t *odd;
sum = 0;
check = buf;
for (i = 0; i < len / 2 ; i++)
sum += check[i];
if (len & 0x01) {
odd = buf;
sum += odd[len];
}
return ~((sum & 0xffff) + (sum >> 16));
}
static void test_checksum(void)
{
uint8_t buf[20] = {
0x45, 0x00, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00,
0x40, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xff, 0xff, 0xff, 0xff
};
uint8_t check[2] = {
0x78, 0xae
};
uint16_t *val = (uint16_t *)check;
assert(client_checksum(&buf, 20) == *val);
}
static int check_options(uint8_t code, uint8_t len, const uint8_t *option,
void *user_data)
{
return 0;
}
int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
const void *packet, size_t len)
{
size_t size;
_cleanup_free_ DHCPPacket *discover;
uint16_t ip_check, udp_check;
int res;
assert(s >= 0);
assert(packet);
size = sizeof(DHCPPacket) + 4;
assert(len > size);
discover = memdup(packet, len);
assert(memcmp(discover->dhcp.chaddr,
&mac_addr.ether_addr_octet, 6) == 0);
assert(discover->ip.ttl == IPDEFTTL);
assert(discover->ip.protocol == IPPROTO_UDP);
assert(discover->ip.saddr == INADDR_ANY);
assert(discover->ip.daddr == INADDR_BROADCAST);
assert(discover->udp.source == be16toh(DHCP_PORT_CLIENT));
assert(discover->udp.dest == be16toh(DHCP_PORT_SERVER));
ip_check = discover->ip.check;
discover->ip.ttl = 0;
discover->ip.check = discover->udp.len;
udp_check = ~client_checksum(&discover->ip.ttl, len - 8);
assert(udp_check == 0xffff);
discover->ip.ttl = IPDEFTTL;
discover->ip.check = ip_check;
ip_check = ~client_checksum(&discover->ip, sizeof(discover->ip));
assert(ip_check == 0xffff);
size = len - sizeof(struct iphdr) - sizeof(struct udphdr);
res = dhcp_option_parse(&discover->dhcp, size, check_options, NULL);
if (res < 0)
return res;
return 575;
}
int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link)
{
if (socketpair(AF_UNIX, SOCK_STREAM, 0, test_fd) < 0)
return -errno;
return test_fd[0];
}
static void test_discover_message(sd_event *e)
{
sd_dhcp_client *client;
int res;
client = sd_dhcp_client_new(e);
assert(client);
assert(sd_dhcp_client_set_index(client, 42) >= 0);
assert(sd_dhcp_client_set_mac(client, &mac_addr) >= 0);
assert(sd_dhcp_client_set_request_option(client, 248) >= 0);
res = sd_dhcp_client_start(client);
assert(res == 0 || res == -EINPROGRESS);
close(test_fd[0]);
close(test_fd[1]);
}
int main(int argc, char *argv[])
{
sd_event *e;
assert(sd_event_new(&e) >= 0);
test_request_basic(e);
test_checksum();
test_discover_message(e);
sd_event_run(e, (uint64_t) -1);
return 0;
}
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