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Systemd/src/libsystemd-network/test-dhcp-client.c
Zbigniew Jędrzejewski-Szmek 11a1589223 tree-wide: drop license boilerplate 
Files which are installed as-is (any .service and other unit files, .conf
files, .policy files, etc), are left as is. My assumption is that SPDX
identifiers are not yet that well known, so it's better to retain the
extended header to avoid any doubt.

I also kept any copyright lines. We can probably remove them, but it'd nice to
obtain explicit acks from all involved authors before doing that.
2018-04-06 18:58:55 +02:00

551 lines
20 KiB
C
Raw Blame History

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright (C) 2013 Intel Corporation. All rights reserved.
***/
#include <errno.h>
#include <stdio.h>
#include <sys/socket.h>
#include <unistd.h>
#include "sd-dhcp-client.h"
#include "sd-event.h"
#include "alloc-util.h"
#include "dhcp-identifier.h"
#include "dhcp-internal.h"
#include "dhcp-protocol.h"
#include "fd-util.h"
#include "util.h"
static uint8_t mac_addr[] = {'A', 'B', 'C', '1', '2', '3'};
typedef int (*test_callback_recv_t)(size_t size, DHCPMessage *dhcp);
static bool verbose = true;
static int test_fd[2];
static test_callback_recv_t callback_recv;
static be32_t xid;
static sd_event_source *test_hangcheck;
static int test_dhcp_hangcheck(sd_event_source *s, uint64_t usec, void *userdata) {
assert_not_reached("Test case should have completed in 2 seconds");
return 0;
}
static void test_request_basic(sd_event *e) {
int r;
sd_dhcp_client *client;
if (verbose)
printf("* %s\n", __FUNCTION__);
/* Initialize client without Anonymize settings. */
r = sd_dhcp_client_new(&client, false);
assert_se(r >= 0);
assert_se(client);
r = sd_dhcp_client_attach_event(client, e, 0);
assert_se(r >= 0);
assert_se(sd_dhcp_client_set_request_option(NULL, 0) == -EINVAL);
assert_se(sd_dhcp_client_set_request_address(NULL, NULL) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(NULL, 0) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(client, 15) == 0);
assert_se(sd_dhcp_client_set_ifindex(client, -42) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(client, -1) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(client, 0) == -EINVAL);
assert_se(sd_dhcp_client_set_ifindex(client, 1) == 0);
assert_se(sd_dhcp_client_set_hostname(client, "host") == 1);
assert_se(sd_dhcp_client_set_hostname(client, "host.domain") == 1);
assert_se(sd_dhcp_client_set_hostname(client, NULL) == 1);
assert_se(sd_dhcp_client_set_hostname(client, "~host") == -EINVAL);
assert_se(sd_dhcp_client_set_hostname(client, "~host.domain") == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_SUBNET_MASK) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_ROUTER) == -EEXIST);
/* This PRL option is not set when using Anonymize, but in this test
* Anonymize settings are not being used. */
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_HOST_NAME) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_DOMAIN_NAME) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_DOMAIN_NAME_SERVER) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_PAD) == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_END) == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_MESSAGE_TYPE) == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_OVERLOAD) == -EINVAL);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_PARAMETER_REQUEST_LIST)
== -EINVAL);
/* RFC7844: option 33 (SD_DHCP_OPTION_STATIC_ROUTE) is set in the
* default PRL when using Anonymize, so it is changed to other option
* that is not set by default, to check that it was set successfully.
* Options not set by default (using or not anonymize) are option 17
* (SD_DHCP_OPTION_ROOT_PATH) and 42 (SD_DHCP_OPTION_NTP_SERVER) */
assert_se(sd_dhcp_client_set_request_option(client, 17) == 0);
assert_se(sd_dhcp_client_set_request_option(client, 17) == -EEXIST);
assert_se(sd_dhcp_client_set_request_option(client, 42) == 0);
assert_se(sd_dhcp_client_set_request_option(client, 17) == -EEXIST);
sd_dhcp_client_unref(client);
}
static void test_request_anonymize(sd_event *e) {
int r;
sd_dhcp_client *client;
if (verbose)
printf("* %s\n", __FUNCTION__);
/* Initialize client with Anonymize settings. */
r = sd_dhcp_client_new(&client, true);
assert_se(r >= 0);
assert_se(client);
r = sd_dhcp_client_attach_event(client, e, 0);
assert_se(r >= 0);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_NETBIOS_NAMESERVER) == -EEXIST);
/* This PRL option is not set when using Anonymize */
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_HOST_NAME) == 0);
assert_se(sd_dhcp_client_set_request_option(client,
SD_DHCP_OPTION_PARAMETER_REQUEST_LIST)
== -EINVAL);
/* RFC7844: option 101 (SD_DHCP_OPTION_NEW_TZDB_TIMEZONE) is not set in the
* default PRL when using Anonymize, */
assert_se(sd_dhcp_client_set_request_option(client, 101) == 0);
assert_se(sd_dhcp_client_set_request_option(client, 101) == -EEXIST);
sd_dhcp_client_unref(client);
}
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
};
if (verbose)
printf("* %s\n", __FUNCTION__);
assert_se(dhcp_packet_checksum((uint8_t*)&buf, 20) == be16toh(0x78ae));
}
static int check_options(uint8_t code, uint8_t len, const void *option, void *userdata) {
switch(code) {
case SD_DHCP_OPTION_CLIENT_IDENTIFIER:
{
uint32_t iaid;
struct duid duid;
size_t duid_len;
assert_se(dhcp_identifier_set_duid_en(&duid, &duid_len) >= 0);
assert_se(dhcp_identifier_set_iaid(42, mac_addr, ETH_ALEN, &iaid) >= 0);
assert_se(len == sizeof(uint8_t) + sizeof(uint32_t) + duid_len);
assert_se(len == 19);
assert_se(((uint8_t*) option)[0] == 0xff);
assert_se(memcmp((uint8_t*) option + 1, &iaid, sizeof(iaid)) == 0);
assert_se(memcmp((uint8_t*) option + 5, &duid, duid_len) == 0);
break;
}
default:
break;
}
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;
assert_se(s >= 0);
assert_se(packet);
size = sizeof(DHCPPacket);
assert_se(len > size);
discover = memdup(packet, len);
assert_se(discover->ip.ttl == IPDEFTTL);
assert_se(discover->ip.protocol == IPPROTO_UDP);
assert_se(discover->ip.saddr == INADDR_ANY);
assert_se(discover->ip.daddr == INADDR_BROADCAST);
assert_se(discover->udp.source == be16toh(DHCP_PORT_CLIENT));
assert_se(discover->udp.dest == be16toh(DHCP_PORT_SERVER));
ip_check = discover->ip.check;
discover->ip.ttl = 0;
discover->ip.check = discover->udp.len;
udp_check = ~dhcp_packet_checksum((uint8_t*)&discover->ip.ttl, len - 8);
assert_se(udp_check == 0xffff);
discover->ip.ttl = IPDEFTTL;
discover->ip.check = ip_check;
ip_check = ~dhcp_packet_checksum((uint8_t*)&discover->ip, sizeof(discover->ip));
assert_se(ip_check == 0xffff);
assert_se(discover->dhcp.xid);
assert_se(memcmp(discover->dhcp.chaddr, &mac_addr, ETH_ALEN) == 0);
size = len - sizeof(struct iphdr) - sizeof(struct udphdr);
assert_se(callback_recv);
callback_recv(size, &discover->dhcp);
return 575;
}
int dhcp_network_bind_raw_socket(
int index,
union sockaddr_union *link,
uint32_t id,
const uint8_t *addr, size_t addr_len,
uint16_t arp_type, uint16_t port) {
if (socketpair(AF_UNIX, SOCK_STREAM, 0, test_fd) < 0)
return -errno;
return test_fd[0];
}
int dhcp_network_bind_udp_socket(int ifindex, be32_t address, uint16_t port) {
int fd;
fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC, 0);
if (fd < 0)
return -errno;
return fd;
}
int dhcp_network_send_udp_socket(int s, be32_t address, uint16_t port, const void *packet, size_t len) {
return 0;
}
static int test_discover_message_verify(size_t size, struct DHCPMessage *dhcp) {
int res;
res = dhcp_option_parse(dhcp, size, check_options, NULL, NULL);
assert_se(res == DHCP_DISCOVER);
if (verbose)
printf(" recv DHCP Discover 0x%08x\n", be32toh(dhcp->xid));
return 0;
}
static void test_discover_message(sd_event *e) {
sd_dhcp_client *client;
int res, r;
if (verbose)
printf("* %s\n", __FUNCTION__);
r = sd_dhcp_client_new(&client, false);
assert_se(r >= 0);
assert_se(client);
r = sd_dhcp_client_attach_event(client, e, 0);
assert_se(r >= 0);
assert_se(sd_dhcp_client_set_ifindex(client, 42) >= 0);
assert_se(sd_dhcp_client_set_mac(client, mac_addr, ETH_ALEN, ARPHRD_ETHER) >= 0);
assert_se(sd_dhcp_client_set_request_option(client, 248) >= 0);
callback_recv = test_discover_message_verify;
res = sd_dhcp_client_start(client);
assert_se(IN_SET(res, 0, -EINPROGRESS));
sd_event_run(e, (uint64_t) -1);
sd_dhcp_client_stop(client);
sd_dhcp_client_unref(client);
test_fd[1] = safe_close(test_fd[1]);
callback_recv = NULL;
}
static uint8_t test_addr_acq_offer[] = {
0x45, 0x10, 0x01, 0x48, 0x00, 0x00, 0x00, 0x00,
0x80, 0x11, 0xb3, 0x84, 0xc0, 0xa8, 0x02, 0x01,
0xc0, 0xa8, 0x02, 0xbf, 0x00, 0x43, 0x00, 0x44,
0x01, 0x34, 0x00, 0x00, 0x02, 0x01, 0x06, 0x00,
0x6f, 0x95, 0x2f, 0x30, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xc0, 0xa8, 0x02, 0xbf,
0xc0, 0xa8, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x63, 0x82, 0x53, 0x63, 0x35, 0x01, 0x02, 0x36,
0x04, 0xc0, 0xa8, 0x02, 0x01, 0x33, 0x04, 0x00,
0x00, 0x02, 0x58, 0x01, 0x04, 0xff, 0xff, 0xff,
0x00, 0x2a, 0x04, 0xc0, 0xa8, 0x02, 0x01, 0x0f,
0x09, 0x6c, 0x61, 0x62, 0x2e, 0x69, 0x6e, 0x74,
0x72, 0x61, 0x03, 0x04, 0xc0, 0xa8, 0x02, 0x01,
0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static uint8_t test_addr_acq_ack[] = {
0x45, 0x10, 0x01, 0x48, 0x00, 0x00, 0x00, 0x00,
0x80, 0x11, 0xb3, 0x84, 0xc0, 0xa8, 0x02, 0x01,
0xc0, 0xa8, 0x02, 0xbf, 0x00, 0x43, 0x00, 0x44,
0x01, 0x34, 0x00, 0x00, 0x02, 0x01, 0x06, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xc0, 0xa8, 0x02, 0xbf,
0xc0, 0xa8, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x63, 0x82, 0x53, 0x63, 0x35, 0x01, 0x05, 0x36,
0x04, 0xc0, 0xa8, 0x02, 0x01, 0x33, 0x04, 0x00,
0x00, 0x02, 0x58, 0x01, 0x04, 0xff, 0xff, 0xff,
0x00, 0x2a, 0x04, 0xc0, 0xa8, 0x02, 0x01, 0x0f,
0x09, 0x6c, 0x61, 0x62, 0x2e, 0x69, 0x6e, 0x74,
0x72, 0x61, 0x03, 0x04, 0xc0, 0xa8, 0x02, 0x01,
0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static void test_addr_acq_acquired(sd_dhcp_client *client, int event,
void *userdata) {
sd_event *e = userdata;
sd_dhcp_lease *lease;
struct in_addr addr;
assert_se(client);
assert_se(event == SD_DHCP_CLIENT_EVENT_IP_ACQUIRE);
assert_se(sd_dhcp_client_get_lease(client, &lease) >= 0);
assert_se(lease);
assert_se(sd_dhcp_lease_get_address(lease, &addr) >= 0);
assert_se(memcmp(&addr.s_addr, &test_addr_acq_ack[44],
sizeof(addr.s_addr)) == 0);
assert_se(sd_dhcp_lease_get_netmask(lease, &addr) >= 0);
assert_se(memcmp(&addr.s_addr, &test_addr_acq_ack[285],
sizeof(addr.s_addr)) == 0);
assert_se(sd_dhcp_lease_get_router(lease, &addr) >= 0);
assert_se(memcmp(&addr.s_addr, &test_addr_acq_ack[308],
sizeof(addr.s_addr)) == 0);
if (verbose)
printf(" DHCP address acquired\n");
sd_event_exit(e, 0);
}
static int test_addr_acq_recv_request(size_t size, DHCPMessage *request) {
uint16_t udp_check = 0;
uint8_t *msg_bytes = (uint8_t *)request;
int res;
res = dhcp_option_parse(request, size, check_options, NULL, NULL);
assert_se(res == DHCP_REQUEST);
assert_se(xid == request->xid);
assert_se(msg_bytes[size - 1] == SD_DHCP_OPTION_END);
if (verbose)
printf(" recv DHCP Request 0x%08x\n", be32toh(xid));
memcpy(&test_addr_acq_ack[26], &udp_check, sizeof(udp_check));
memcpy(&test_addr_acq_ack[32], &xid, sizeof(xid));
memcpy(&test_addr_acq_ack[56], &mac_addr, ETHER_ADDR_LEN);
callback_recv = NULL;
res = write(test_fd[1], test_addr_acq_ack,
sizeof(test_addr_acq_ack));
assert_se(res == sizeof(test_addr_acq_ack));
if (verbose)
printf(" send DHCP Ack\n");
return 0;
};
static int test_addr_acq_recv_discover(size_t size, DHCPMessage *discover) {
uint16_t udp_check = 0;
uint8_t *msg_bytes = (uint8_t *)discover;
int res;
res = dhcp_option_parse(discover, size, check_options, NULL, NULL);
assert_se(res == DHCP_DISCOVER);
assert_se(msg_bytes[size - 1] == SD_DHCP_OPTION_END);
xid = discover->xid;
if (verbose)
printf(" recv DHCP Discover 0x%08x\n", be32toh(xid));
memcpy(&test_addr_acq_offer[26], &udp_check, sizeof(udp_check));
memcpy(&test_addr_acq_offer[32], &xid, sizeof(xid));
memcpy(&test_addr_acq_offer[56], &mac_addr, ETHER_ADDR_LEN);
callback_recv = test_addr_acq_recv_request;
res = write(test_fd[1], test_addr_acq_offer,
sizeof(test_addr_acq_offer));
assert_se(res == sizeof(test_addr_acq_offer));
if (verbose)
printf(" sent DHCP Offer\n");
return 0;
}
static void test_addr_acq(sd_event *e) {
usec_t time_now = now(clock_boottime_or_monotonic());
sd_dhcp_client *client;
int res, r;
if (verbose)
printf("* %s\n", __FUNCTION__);
r = sd_dhcp_client_new(&client, false);
assert_se(r >= 0);
assert_se(client);
r = sd_dhcp_client_attach_event(client, e, 0);
assert_se(r >= 0);
assert_se(sd_dhcp_client_set_ifindex(client, 42) >= 0);
assert_se(sd_dhcp_client_set_mac(client, mac_addr, ETH_ALEN, ARPHRD_ETHER) >= 0);
assert_se(sd_dhcp_client_set_callback(client, test_addr_acq_acquired, e) >= 0);
callback_recv = test_addr_acq_recv_discover;
assert_se(sd_event_add_time(e, &test_hangcheck,
clock_boottime_or_monotonic(),
time_now + 2 * USEC_PER_SEC, 0,
test_dhcp_hangcheck, NULL) >= 0);
res = sd_dhcp_client_start(client);
assert_se(IN_SET(res, 0, -EINPROGRESS));
assert_se(sd_event_loop(e) >= 0);
test_hangcheck = sd_event_source_unref(test_hangcheck);
assert_se(sd_dhcp_client_set_callback(client, NULL, NULL) >= 0);
assert_se(sd_dhcp_client_stop(client) >= 0);
sd_dhcp_client_unref(client);
test_fd[1] = safe_close(test_fd[1]);
callback_recv = NULL;
xid = 0;
}
int main(int argc, char *argv[]) {
_cleanup_(sd_event_unrefp) sd_event *e;
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
assert_se(sd_event_new(&e) >= 0);
test_request_basic(e);
test_request_anonymize(e);
test_checksum();
test_discover_message(e);
test_addr_acq(e);
#ifdef VALGRIND
/* Make sure the async_close thread has finished.
* valgrind would report some of the phread_* structures
* as not cleaned up properly. */
sleep(1);
#endif
return 0;
}
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