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Systemd/src/libsystemd-network/test-dhcp6-client.c
Patrik Flykt d63be95a30 test-dhcp6-client: Add checks for Elapsed Time option 
Verify that the Elapsed Time option is present.
2014-09-10 12:56:29 +03:00

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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2014 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 <stdbool.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <net/ethernet.h>
#include "socket-util.h"
#include "macro.h"
#include "sd-event.h"
#include "event-util.h"
#include "virt.h"
#include "sd-dhcp6-client.h"
#include "dhcp6-protocol.h"
#include "dhcp6-internal.h"
#include "dhcp6-lease-internal.h"
static struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
};
static bool verbose = false;
static sd_event_source *hangcheck;
static int test_dhcp_fd[2];
static int test_index = 42;
static int test_client_message_num;
static be32_t test_iaid = 0;
static uint8_t test_duid[14] = { };
static int test_client_basic(sd_event *e) {
sd_dhcp6_client *client;
if (verbose)
printf("* %s\n", __FUNCTION__);
assert_se(sd_dhcp6_client_new(&client) >= 0);
assert_se(client);
assert_se(sd_dhcp6_client_attach_event(client, e, 0) >= 0);
assert_se(sd_dhcp6_client_set_index(client, 15) == 0);
assert_se(sd_dhcp6_client_set_index(client, -42) == -EINVAL);
assert_se(sd_dhcp6_client_set_index(client, -1) == 0);
assert_se(sd_dhcp6_client_set_index(client, 42) >= 0);
assert_se(sd_dhcp6_client_set_mac(client, &mac_addr) >= 0);
assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_CLIENTID) == -EINVAL);
assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_DNS_SERVERS) == -EEXIST);
assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_NTP_SERVER) == -EEXIST);
assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_SNTP_SERVERS) == 0);
assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_DOMAIN_LIST) == -EEXIST);
assert_se(sd_dhcp6_client_set_request_option(client, 10) == -EINVAL);
assert_se(sd_dhcp6_client_set_callback(client, NULL, NULL) >= 0);
assert_se(sd_dhcp6_client_detach_event(client) >= 0);
assert_se(!sd_dhcp6_client_unref(client));
return 0;
}
static int test_option(sd_event *e) {
uint8_t packet[] = {
'F', 'O', 'O',
0x00, DHCP6_OPTION_ORO, 0x00, 0x07,
'A', 'B', 'C', 'D', 'E', 'F', 'G',
0x00, DHCP6_OPTION_VENDOR_CLASS, 0x00, 0x09,
'1', '2', '3', '4', '5', '6', '7', '8', '9',
'B', 'A', 'R',
};
uint8_t result[] = {
'F', 'O', 'O',
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
'B', 'A', 'R',
};
uint16_t optcode;
size_t optlen;
uint8_t *optval, *buf, *out;
size_t zero = 0, pos = 3;
size_t buflen = sizeof(packet), outlen = sizeof(result);
if (verbose)
printf("* %s\n", __FUNCTION__);
assert_se(buflen == outlen);
assert_se(dhcp6_option_parse(&buf, &zero, &optcode, &optlen,
&optval) == -ENOMSG);
buflen -= 3;
buf = &packet[3];
outlen -= 3;
out = &result[3];
assert_se(dhcp6_option_parse(&buf, &buflen, &optcode, &optlen,
&optval) >= 0);
pos += 4 + optlen;
assert_se(buf == &packet[pos]);
assert_se(optcode == DHCP6_OPTION_ORO);
assert_se(optlen == 7);
assert_se(buflen + pos == sizeof(packet));
assert_se(dhcp6_option_append(&out, &outlen, optcode, optlen,
optval) >= 0);
assert_se(out == &result[pos]);
assert_se(*out == 0x00);
assert_se(dhcp6_option_parse(&buf, &buflen, &optcode, &optlen,
&optval) >= 0);
pos += 4 + optlen;
assert_se(buf == &packet[pos]);
assert_se(optcode == DHCP6_OPTION_VENDOR_CLASS);
assert_se(optlen == 9);
assert_se(buflen + pos == sizeof(packet));
assert_se(dhcp6_option_append(&out, &outlen, optcode, optlen,
optval) >= 0);
assert_se(out == &result[pos]);
assert_se(*out == 'B');
assert_se(memcmp(packet, result, sizeof(packet)) == 0);
return 0;
}
static uint8_t msg_advertise[198] = {
0x02, 0x0f, 0xb4, 0xe5, 0x00, 0x01, 0x00, 0x0e,
0x00, 0x01, 0x00, 0x01, 0x1a, 0x6b, 0xf3, 0x30,
0x3c, 0x97, 0x0e, 0xcf, 0xa3, 0x7d, 0x00, 0x03,
0x00, 0x5e, 0x0e, 0xcf, 0xa3, 0x7d, 0x00, 0x00,
0x00, 0x50, 0x00, 0x00, 0x00, 0x78, 0x00, 0x05,
0x00, 0x18, 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad,
0xbe, 0xef, 0x78, 0xee, 0x1c, 0xf3, 0x09, 0x3c,
0x55, 0xad, 0x00, 0x00, 0x00, 0x96, 0x00, 0x00,
0x00, 0xb4, 0x00, 0x0d, 0x00, 0x32, 0x00, 0x00,
0x41, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x28,
0x65, 0x73, 0x29, 0x20, 0x72, 0x65, 0x6e, 0x65,
0x77, 0x65, 0x64, 0x2e, 0x20, 0x47, 0x72, 0x65,
0x65, 0x74, 0x69, 0x6e, 0x67, 0x73, 0x20, 0x66,
0x72, 0x6f, 0x6d, 0x20, 0x70, 0x6c, 0x61, 0x6e,
0x65, 0x74, 0x20, 0x45, 0x61, 0x72, 0x74, 0x68,
0x00, 0x17, 0x00, 0x10, 0x20, 0x01, 0x0d, 0xb8,
0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01, 0x00, 0x18, 0x00, 0x0b,
0x03, 0x6c, 0x61, 0x62, 0x05, 0x69, 0x6e, 0x74,
0x72, 0x61, 0x00, 0x00, 0x1f, 0x00, 0x10, 0x20,
0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
0x02, 0x00, 0x0e, 0x00, 0x01, 0x00, 0x01, 0x19,
0x40, 0x5c, 0x53, 0x78, 0x2b, 0xcb, 0xb3, 0x6d,
0x53, 0x00, 0x07, 0x00, 0x01, 0x00
};
static uint8_t msg_reply[173] = {
0x07, 0xf7, 0x4e, 0x57, 0x00, 0x02, 0x00, 0x0e,
0x00, 0x01, 0x00, 0x01, 0x19, 0x40, 0x5c, 0x53,
0x78, 0x2b, 0xcb, 0xb3, 0x6d, 0x53, 0x00, 0x01,
0x00, 0x0e, 0x00, 0x01, 0x00, 0x01, 0x1a, 0x6b,
0xf3, 0x30, 0x3c, 0x97, 0x0e, 0xcf, 0xa3, 0x7d,
0x00, 0x03, 0x00, 0x4a, 0x0e, 0xcf, 0xa3, 0x7d,
0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0x00, 0x78,
0x00, 0x05, 0x00, 0x18, 0x20, 0x01, 0x0d, 0xb8,
0xde, 0xad, 0xbe, 0xef, 0x78, 0xee, 0x1c, 0xf3,
0x09, 0x3c, 0x55, 0xad, 0x00, 0x00, 0x00, 0x96,
0x00, 0x00, 0x00, 0xb4, 0x00, 0x0d, 0x00, 0x1e,
0x00, 0x00, 0x41, 0x6c, 0x6c, 0x20, 0x61, 0x64,
0x64, 0x72, 0x65, 0x73, 0x73, 0x65, 0x73, 0x20,
0x77, 0x65, 0x72, 0x65, 0x20, 0x61, 0x73, 0x73,
0x69, 0x67, 0x6e, 0x65, 0x64, 0x2e, 0x00, 0x17,
0x00, 0x10, 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad,
0xbe, 0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0x00, 0x18, 0x00, 0x0b, 0x03, 0x6c,
0x61, 0x62, 0x05, 0x69, 0x6e, 0x74, 0x72, 0x61,
0x00, 0x00, 0x1f, 0x00, 0x10, 0x20, 0x01, 0x0d,
0xb8, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01
};
static int test_advertise_option(sd_event *e) {
_cleanup_dhcp6_lease_free_ sd_dhcp6_lease *lease = NULL;
DHCP6Message *advertise = (DHCP6Message *)msg_advertise;
uint8_t *optval, *opt = msg_advertise + sizeof(DHCP6Message);
uint16_t optcode;
size_t optlen, len = sizeof(msg_advertise) - sizeof(DHCP6Message);
be32_t val;
uint8_t preference = 255;
struct in6_addr addr;
uint32_t lt_pref, lt_valid;
int r;
bool opt_clientid = false;
if (verbose)
printf("* %s\n", __FUNCTION__);
assert_se(dhcp6_lease_new(&lease) >= 0);
assert_se(advertise->type == DHCP6_ADVERTISE);
assert_se((be32toh(advertise->transaction_id) & 0x00ffffff) ==
0x0fb4e5);
while ((r = dhcp6_option_parse(&opt, &len, &optcode, &optlen,
&optval)) >= 0) {
switch(optcode) {
case DHCP6_OPTION_CLIENTID:
assert_se(optlen == 14);
opt_clientid = true;
break;
case DHCP6_OPTION_IA_NA:
assert_se(optlen == 94);
assert_se(!memcmp(optval, &msg_advertise[26], optlen));
val = htobe32(0x0ecfa37d);
assert_se(!memcmp(optval, &val, sizeof(val)));
val = htobe32(80);
assert_se(!memcmp(optval + 4, &val, sizeof(val)));
val = htobe32(120);
assert_se(!memcmp(optval + 8, &val, sizeof(val)));
assert_se(dhcp6_option_parse_ia(&optval, &optlen,
optcode,
&lease->ia) >= 0);
break;
case DHCP6_OPTION_SERVERID:
assert_se(optlen == 14);
assert_se(!memcmp(optval, &msg_advertise[179], optlen));
assert_se(dhcp6_lease_set_serverid(lease, optval,
optlen) >= 0);
break;
case DHCP6_OPTION_PREFERENCE:
assert_se(optlen == 1);
assert_se(!*optval);
assert_se(dhcp6_lease_set_preference(lease,
*optval) >= 0);
break;
case DHCP6_OPTION_ELAPSED_TIME:
assert_se(optlen == 2);
break;
default:
break;
}
}
assert_se(r == -ENOMSG);
assert_se(opt_clientid);
assert_se(sd_dhcp6_lease_get_first_address(lease, &addr, &lt_pref,
&lt_valid) >= 0);
assert_se(!memcmp(&addr, &msg_advertise[42], sizeof(addr)));
assert_se(lt_pref == 150);
assert_se(lt_valid == 180);
assert_se(sd_dhcp6_lease_get_next_address(lease, &addr, &lt_pref,
&lt_valid) == -ENOMSG);
assert_se(sd_dhcp6_lease_get_first_address(lease, &addr, &lt_pref,
&lt_valid) >= 0);
assert_se(!memcmp(&addr, &msg_advertise[42], sizeof(addr)));
assert_se(sd_dhcp6_lease_get_next_address(lease, &addr, &lt_pref,
&lt_valid) == -ENOMSG);
assert_se(sd_dhcp6_lease_get_next_address(lease, &addr, &lt_pref,
&lt_valid) == -ENOMSG);
assert_se(sd_dhcp6_lease_get_first_address(lease, &addr, &lt_pref,
&lt_valid) >= 0);
assert_se(!memcmp(&addr, &msg_advertise[42], sizeof(addr)));
assert_se(sd_dhcp6_lease_get_next_address(lease, &addr, &lt_pref,
&lt_valid) == -ENOMSG);
assert_se(dhcp6_lease_get_serverid(lease, &opt, &len) >= 0);
assert_se(len == 14);
assert_se(!memcmp(opt, &msg_advertise[179], len));
assert_se(dhcp6_lease_get_preference(lease, &preference) >= 0);
assert_se(preference == 0);
return 0;
}
static int test_hangcheck(sd_event_source *s, uint64_t usec, void *userdata) {
assert_not_reached("Test case should have completed in 2 seconds");
return 0;
}
int detect_vm(const char **id) {
return 1;
}
int detect_container(const char **id) {
return 1;
}
int detect_virtualization(const char **id) {
return 1;
}
int dhcp6_network_bind_udp_socket(int index, struct in6_addr *local_address) {
assert_se(index == test_index);
if (socketpair(AF_UNIX, SOCK_STREAM, 0, test_dhcp_fd) < 0)
return -errno;
return test_dhcp_fd[0];
}
static int test_client_send_reply(DHCP6Message *request) {
DHCP6Message reply;
reply.transaction_id = request->transaction_id;
reply.type = DHCP6_REPLY;
memcpy(msg_reply, &reply.transaction_id, 4);
memcpy(&msg_reply[26], test_duid, sizeof(test_duid));
memcpy(&msg_reply[44], &test_iaid, sizeof(test_iaid));
assert_se(write(test_dhcp_fd[1], msg_reply, sizeof(msg_reply))
== sizeof(msg_reply));
return 0;
}
static int test_client_verify_request(DHCP6Message *request, uint8_t *option,
size_t len) {
_cleanup_dhcp6_lease_free_ sd_dhcp6_lease *lease = NULL;
uint8_t *optval;
uint16_t optcode;
size_t optlen;
bool found_clientid = false, found_iana = false, found_serverid = false,
found_elapsed_time = false;
int r;
struct in6_addr addr;
be32_t val;
uint32_t lt_pref, lt_valid;
assert_se(request->type == DHCP6_REQUEST);
assert_se(dhcp6_lease_new(&lease) >= 0);
while ((r = dhcp6_option_parse(&option, &len,
&optcode, &optlen, &optval)) >= 0) {
switch(optcode) {
case DHCP6_OPTION_CLIENTID:
assert_se(!found_clientid);
found_clientid = true;
assert_se(!memcmp(optval, &test_duid,
sizeof(test_duid)));
break;
case DHCP6_OPTION_IA_NA:
assert_se(!found_iana);
found_iana = true;
assert_se(optlen == 40);
assert_se(!memcmp(optval, &test_iaid, sizeof(test_iaid)));
val = htobe32(80);
assert_se(!memcmp(optval + 4, &val, sizeof(val)));
val = htobe32(120);
assert_se(!memcmp(optval + 8, &val, sizeof(val)));
assert_se(!dhcp6_option_parse_ia(&optval, &optlen,
optcode, &lease->ia));
break;
case DHCP6_OPTION_SERVERID:
assert_se(!found_serverid);
found_serverid = true;
assert_se(optlen == 14);
assert_se(!memcmp(&msg_advertise[179], optval, optlen));
break;
case DHCP6_OPTION_ELAPSED_TIME:
assert_se(!found_elapsed_time);
found_elapsed_time = true;
assert_se(optlen == 2);
break;
}
}
assert_se(r == -ENOMSG);
assert_se(found_clientid && found_iana && found_serverid &&
found_elapsed_time);
assert_se(sd_dhcp6_lease_get_first_address(lease, &addr, &lt_pref,
&lt_valid) >= 0);
assert_se(!memcmp(&addr, &msg_advertise[42], sizeof(addr)));
assert_se(lt_pref == 150);
assert_se(lt_valid == 180);
assert_se(sd_dhcp6_lease_get_next_address(lease, &addr, &lt_pref,
&lt_valid) == -ENOMSG);
return 0;
}
static int test_client_send_advertise(DHCP6Message *solicit)
{
DHCP6Message advertise;
advertise.transaction_id = solicit->transaction_id;
advertise.type = DHCP6_ADVERTISE;
memcpy(msg_advertise, &advertise.transaction_id, 4);
memcpy(&msg_advertise[8], test_duid, sizeof(test_duid));
memcpy(&msg_advertise[26], &test_iaid, sizeof(test_iaid));
assert_se(write(test_dhcp_fd[1], msg_advertise, sizeof(msg_advertise))
== sizeof(msg_advertise));
return 0;
}
static int test_client_verify_solicit(DHCP6Message *solicit, uint8_t *option,
size_t len) {
uint8_t *optval;
uint16_t optcode;
size_t optlen;
bool found_clientid = false, found_iana = false,
found_elapsed_time = false;
int r;
assert_se(solicit->type == DHCP6_SOLICIT);
while ((r = dhcp6_option_parse(&option, &len,
&optcode, &optlen, &optval)) >= 0) {
switch(optcode) {
case DHCP6_OPTION_CLIENTID:
assert_se(!found_clientid);
found_clientid = true;
assert_se(optlen == sizeof(test_duid));
memcpy(&test_duid, optval, sizeof(test_duid));
break;
case DHCP6_OPTION_IA_NA:
assert_se(!found_iana);
found_iana = true;
assert_se(optlen == 12);
memcpy(&test_iaid, optval, sizeof(test_iaid));
break;
case DHCP6_OPTION_ELAPSED_TIME:
assert_se(!found_elapsed_time);
found_elapsed_time = true;
assert_se(optlen == 2);
break;
}
}
assert_se(r == -ENOMSG);
assert_se(found_clientid && found_iana && found_elapsed_time);
return 0;
}
int dhcp6_network_send_udp_socket(int s, struct in6_addr *server_address,
const void *packet, size_t len) {
struct in6_addr mcast =
IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT;
DHCP6Message *message;
uint8_t *option;
assert_se(s == test_dhcp_fd[0]);
assert_se(server_address);
assert_se(packet);
assert_se(len > sizeof(DHCP6Message) + 4);
assert_se(IN6_ARE_ADDR_EQUAL(server_address, &mcast));
message = (DHCP6Message *)packet;
option = (uint8_t *)(message + 1);
len -= sizeof(DHCP6Message);
assert_se(message->transaction_id & 0x00ffffff);
if (test_client_message_num == 0) {
test_client_verify_solicit(message, option, len);
test_client_send_advertise(message);
test_client_message_num++;
} else if (test_client_message_num == 1) {
test_client_verify_request(message, option, len);
test_client_send_reply(message);
test_client_message_num++;
}
return len;
}
static void test_client_solicit_cb(sd_dhcp6_client *client, int event,
void *userdata) {
sd_event *e = userdata;
assert_se(e);
assert_se(event == DHCP6_EVENT_IP_ACQUIRE);
assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_DNS_SERVERS) == -EBUSY);
if (verbose)
printf(" got DHCPv6 event %d\n", event);
sd_event_exit(e, 0);
}
static int test_client_solicit(sd_event *e) {
sd_dhcp6_client *client;
usec_t time_now = now(clock_boottime_or_monotonic());
if (verbose)
printf("* %s\n", __FUNCTION__);
assert_se(sd_dhcp6_client_new(&client) >= 0);
assert_se(client);
assert_se(sd_dhcp6_client_attach_event(client, e, 0) >= 0);
assert_se(sd_dhcp6_client_set_index(client, test_index) == 0);
assert_se(sd_dhcp6_client_set_mac(client, &mac_addr) >= 0);
assert_se(sd_dhcp6_client_set_callback(client,
test_client_solicit_cb, e) >= 0);
assert_se(sd_event_add_time(e, &hangcheck, clock_boottime_or_monotonic(),
time_now + 2 * USEC_PER_SEC, 0,
test_hangcheck, NULL) >= 0);
assert_se(sd_dhcp6_client_start(client) >= 0);
sd_event_loop(e);
hangcheck = sd_event_source_unref(hangcheck);
assert_se(!sd_dhcp6_client_unref(client));
test_dhcp_fd[1] = safe_close(test_dhcp_fd[1]);
return 0;
}
int main(int argc, char *argv[]) {
_cleanup_event_unref_ sd_event *e;
assert_se(sd_event_new(&e) >= 0);
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
test_client_basic(e);
test_option(e);
test_advertise_option(e);
test_client_solicit(e);
assert_se(!sd_event_unref(e));
return 0;
}
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