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Systemd/src/libsystemd-network/test-dhcp6-client.c
Susant Sahani 5c95a9134a sd-network: Rectify Advertise Message Processing by a Client 
We need to fix RCC 2215 behaviour with rfc7550 errata
and https://tools.ietf.org/html/rfc8415.

[RFC3315] specifies that a client must ignore an Advertise message if
   a server will not assign any addresses to a client, and [RFC3633]
   specifies that a client must ignore an Advertise message if a server
   returns the NoPrefixAvail status to a requesting router.  Thus, a
   client requesting both IA_NA and IA_PD, with a server that only
   offers either addresses or delegated prefixes, is not supported by
   the current protocol specifications.

   Solution: a client SHOULD accept Advertise messages, even when not
   all IA option types are being offered.  And, in this case, the client
   SHOULD include the not offered IA option types in its Request.  A
   client SHOULD only ignore an Advertise message when none of the
   requested IA options include offered addresses or delegated prefixes.
   Note that ignored messages MUST still be processed for SOL_MAX_RT and
   INF_MAX_RT options as specified in [RFC7083].

   Replace Section 17.1.3 of RFC 3315: (existing errata)

     The client MUST ignore any Advertise message that includes a Status
     Code option containing the value NoAddrsAvail, with the exception
     that the client MAY display the associated status message(s) to the
     user.

   With the following text (which addresses the existing erratum
   [Err2471] and includes the changes made by [RFC7083]):

     The client MUST ignore any Advertise message that contains no
     addresses (IAADDR options encapsulated in IA_NA or IA_TA options)
     and no delegated prefixes (IAPREFIX options encapsulated in IA_PD
     options; see RFC 3633) with the exception that the client:

       - MUST process an included SOL_MAX_RT option (RFC 7083) and
       - MUST process an included INF_MAX_RT option (RFC 7083).

     A client can display any associated status message(s) to the user
     or activity log.

     The client ignoring this Advertise message MUST NOT restart the
     Solicit retransmission timer.
2020-05-29 16:17:36 +09:00

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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
Copyright © 2014 Intel Corporation. All rights reserved.
***/
#include <net/ethernet.h>
#include <net/if_arp.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include "sd-dhcp6-client.h"
#include "sd-event.h"
#include "dhcp6-internal.h"
#include "dhcp6-lease-internal.h"
#include "dhcp6-protocol.h"
#include "fd-util.h"
#include "macro.h"
#include "memory-util.h"
#include "socket-util.h"
#include "tests.h"
#include "time-util.h"
#include "virt.h"
static struct ether_addr mac_addr = {
.ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
};
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;
int v;
log_debug("/* %s */", __func__);
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_ifindex(client, 15) == 0);
assert_se(sd_dhcp6_client_set_ifindex(client, -42) == -EINVAL);
assert_se(sd_dhcp6_client_set_ifindex(client, -1) == 0);
assert_se(sd_dhcp6_client_set_ifindex(client, 42) >= 0);
assert_se(sd_dhcp6_client_set_mac(client, (const uint8_t *) &mac_addr,
sizeof (mac_addr),
ARPHRD_ETHER) >= 0);
assert_se(sd_dhcp6_client_set_fqdn(client, "host") == 1);
assert_se(sd_dhcp6_client_set_fqdn(client, "host.domain") == 1);
assert_se(sd_dhcp6_client_set_fqdn(client, NULL) == 1);
assert_se(sd_dhcp6_client_set_fqdn(client, "~host") == -EINVAL);
assert_se(sd_dhcp6_client_set_fqdn(client, "~host.domain") == -EINVAL);
assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_CLIENTID) == 0);
assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_DNS_SERVERS) == -EEXIST);
assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_NTP_SERVER) == -EEXIST);
assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_SNTP_SERVERS) == -EEXIST);
assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_DOMAIN_LIST) == -EEXIST);
assert_se(sd_dhcp6_client_set_request_option(client, 10) == 0);
assert_se(sd_dhcp6_client_set_information_request(client, 1) >= 0);
v = 0;
assert_se(sd_dhcp6_client_get_information_request(client, &v) >= 0);
assert_se(v);
assert_se(sd_dhcp6_client_set_information_request(client, 0) >= 0);
v = 42;
assert_se(sd_dhcp6_client_get_information_request(client, &v) >= 0);
assert_se(v == 0);
v = 0;
assert_se(sd_dhcp6_client_get_address_request(client, &v) >= 0);
assert_se(v);
v = 0;
assert_se(sd_dhcp6_client_set_address_request(client, 1) >= 0);
assert_se(sd_dhcp6_client_get_address_request(client, &v) >= 0);
assert_se(v);
v = 42;
assert_se(sd_dhcp6_client_set_address_request(client, 1) >= 0);
assert_se(sd_dhcp6_client_get_address_request(client, &v) >= 0);
assert_se(v);
assert_se(sd_dhcp6_client_set_address_request(client, 1) >= 0);
assert_se(sd_dhcp6_client_set_prefix_delegation(client, 1) >= 0);
v = 0;
assert_se(sd_dhcp6_client_get_address_request(client, &v) >= 0);
assert_se(v);
v = 0;
assert_se(sd_dhcp6_client_get_prefix_delegation(client, &v) >= 0);
assert_se(v);
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, SD_DHCP6_OPTION_ORO, 0x00, 0x07,
'A', 'B', 'C', 'D', 'E', 'F', 'G',
0x00, SD_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);
log_debug("/* %s */", __func__);
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 == SD_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 == SD_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 int test_option_status(sd_event *e) {
uint8_t option1[] = {
/* IA NA */
0x00, 0x03, 0x00, 0x12, 0x1a, 0x1d, 0x1a, 0x1d,
0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
/* status option */
0x00, 0x0d, 0x00, 0x02, 0x00, 0x01,
};
static const uint8_t option2[] = {
/* IA NA */
0x00, 0x03, 0x00, 0x2e, 0x1a, 0x1d, 0x1a, 0x1d,
0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
/* IA Addr */
0x00, 0x05, 0x00, 0x1e,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
0x01, 0x02, 0x03, 0x04, 0x0a, 0x0b, 0x0c, 0x0d,
/* status option */
0x00, 0x0d, 0x00, 0x02, 0x00, 0x01,
};
static const uint8_t option3[] = {
/* IA NA */
0x00, 0x03, 0x00, 0x34, 0x1a, 0x1d, 0x1a, 0x1d,
0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
/* IA Addr */
0x00, 0x05, 0x00, 0x24,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
0x01, 0x02, 0x03, 0x04, 0x0a, 0x0b, 0x0c, 0x0d,
/* status option */
0x00, 0x0d, 0x00, 0x08, 0x00, 0x00, 'f', 'o',
'o', 'b', 'a', 'r',
};
static const uint8_t option4[] = {
/* IA PD */
0x00, 0x19, 0x00, 0x2f, 0x1a, 0x1d, 0x1a, 0x1d,
0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
/* IA PD Prefix */
0x00, 0x1a, 0x00, 0x1f,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x80, 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe,
0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
/* status option */
0x00, 0x0d, 0x00, 0x02, 0x00, 0x00,
};
static const uint8_t option5[] = {
/* IA PD */
0x00, 0x19, 0x00, 0x52, 0x1a, 0x1d, 0x1a, 0x1d,
0x00, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x02,
/* IA PD Prefix #1 */
0x00, 0x1a, 0x00, 0x1f,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x80, 0x20, 0x01, 0x0d, 0xb8, 0xde, 0xad, 0xbe,
0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
/* status option */
0x00, 0x0d, 0x00, 0x02, 0x00, 0x00,
/* IA PD Prefix #2 */
0x00, 0x1a, 0x00, 0x1f,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x80, 0x20, 0x01, 0x0d, 0xb8, 0xc0, 0x0l, 0xd0,
0x0d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00,
0x00, 0x0d, 0x00, 0x02, 0x00, 0x00,
};
DHCP6Option *option;
DHCP6IA ia, pd;
int r = 0;
log_debug("/* %s */", __func__);
zero(ia);
option = (DHCP6Option *)option1;
assert_se(sizeof(option1) == sizeof(DHCP6Option) + be16toh(option->len));
r = dhcp6_option_parse_ia(option, &ia, NULL);
assert_se(r == 0);
assert_se(ia.addresses == NULL);
option->len = htobe16(17);
r = dhcp6_option_parse_ia(option, &ia, NULL);
assert_se(r == -ENOBUFS);
assert_se(ia.addresses == NULL);
option->len = htobe16(sizeof(DHCP6Option));
r = dhcp6_option_parse_ia(option, &ia, NULL);
assert_se(r == -ENOBUFS);
assert_se(ia.addresses == NULL);
zero(ia);
option = (DHCP6Option *)option2;
assert_se(sizeof(option2) == sizeof(DHCP6Option) + be16toh(option->len));
r = dhcp6_option_parse_ia(option, &ia, NULL);
assert_se(r >= 0);
assert_se(ia.addresses == NULL);
zero(ia);
option = (DHCP6Option *)option3;
assert_se(sizeof(option3) == sizeof(DHCP6Option) + be16toh(option->len));
r = dhcp6_option_parse_ia(option, &ia, NULL);
assert_se(r >= 0);
assert_se(ia.addresses != NULL);
dhcp6_lease_free_ia(&ia);
zero(pd);
option = (DHCP6Option *)option4;
assert_se(sizeof(option4) == sizeof(DHCP6Option) + be16toh(option->len));
r = dhcp6_option_parse_ia(option, &pd, NULL);
assert_se(r >= 0);
assert_se(pd.addresses != NULL);
assert_se(memcmp(&pd.ia_pd.id, &option4[4], 4) == 0);
assert_se(memcmp(&pd.ia_pd.lifetime_t1, &option4[8], 4) == 0);
assert_se(memcmp(&pd.ia_pd.lifetime_t2, &option4[12], 4) == 0);
dhcp6_lease_free_ia(&pd);
zero(pd);
option = (DHCP6Option *)option5;
assert_se(sizeof(option5) == sizeof(DHCP6Option) + be16toh(option->len));
r = dhcp6_option_parse_ia(option, &pd, NULL);
assert_se(r >= 0);
assert_se(pd.addresses != NULL);
dhcp6_lease_free_ia(&pd);
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 uint8_t fqdn_wire[16] = {
0x04, 'h', 'o', 's', 't', 0x03, 'l', 'a', 'b',
0x05, 'i', 'n', 't', 'r', 'a', 0x00
};
static int test_advertise_option(sd_event *e) {
_cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL;
DHCP6Message *advertise = (DHCP6Message *)msg_advertise;
size_t len = sizeof(msg_advertise) - sizeof(DHCP6Message), pos = 0;
uint32_t lt_pref, lt_valid;
bool opt_clientid = false;
const struct in6_addr *addrs;
uint8_t preference = 255;
struct in6_addr addr;
char **domains;
uint8_t *opt;
int r;
be32_t val;
log_debug("/* %s */", __func__);
assert_se(len >= sizeof(DHCP6Message));
assert_se(dhcp6_lease_new(&lease) >= 0);
assert_se(advertise->type == DHCP6_ADVERTISE);
assert_se((be32toh(advertise->transaction_id) & 0x00ffffff) ==
0x0fb4e5);
while (pos < len) {
DHCP6Option *option = (DHCP6Option *)&advertise->options[pos];
const uint16_t optcode = be16toh(option->code);
const uint16_t optlen = be16toh(option->len);
uint8_t *optval = option->data;
switch(optcode) {
case SD_DHCP6_OPTION_CLIENTID:
assert_se(optlen == 14);
opt_clientid = true;
break;
case SD_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(option, &lease->ia, NULL) >= 0);
break;
case SD_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 SD_DHCP6_OPTION_PREFERENCE:
assert_se(optlen == 1);
assert_se(!*optval);
assert_se(dhcp6_lease_set_preference(lease,
*optval) >= 0);
break;
case SD_DHCP6_OPTION_ELAPSED_TIME:
assert_se(optlen == 2);
break;
case SD_DHCP6_OPTION_DNS_SERVERS:
assert_se(optlen == 16);
assert_se(dhcp6_lease_set_dns(lease, optval,
optlen) >= 0);
break;
case SD_DHCP6_OPTION_DOMAIN_LIST:
assert_se(optlen == 11);
assert_se(dhcp6_lease_set_domains(lease, optval,
optlen) >= 0);
break;
case SD_DHCP6_OPTION_SNTP_SERVERS:
assert_se(optlen == 16);
assert_se(dhcp6_lease_set_sntp(lease, optval,
optlen) >= 0);
break;
default:
break;
}
pos += sizeof(*option) + optlen;
}
assert_se(pos == len);
assert_se(opt_clientid);
sd_dhcp6_lease_reset_address_iter(lease);
assert_se(sd_dhcp6_lease_get_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_address(lease, &addr, &lt_pref,
&lt_valid) == -ENOMSG);
sd_dhcp6_lease_reset_address_iter(lease);
assert_se(sd_dhcp6_lease_get_address(lease, &addr, &lt_pref,
&lt_valid) >= 0);
assert_se(!memcmp(&addr, &msg_advertise[42], sizeof(addr)));
assert_se(sd_dhcp6_lease_get_address(lease, &addr, &lt_pref,
&lt_valid) == -ENOMSG);
sd_dhcp6_lease_reset_address_iter(lease);
assert_se(sd_dhcp6_lease_get_address(lease, &addr, &lt_pref,
&lt_valid) >= 0);
assert_se(!memcmp(&addr, &msg_advertise[42], sizeof(addr)));
assert_se(sd_dhcp6_lease_get_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);
r = sd_dhcp6_lease_get_dns(lease, &addrs);
assert_se(r == 1);
assert_se(!memcmp(addrs, &msg_advertise[124], r * 16));
r = sd_dhcp6_lease_get_domains(lease, &domains);
assert_se(r == 1);
assert_se(!strcmp("lab.intra", domains[0]));
assert_se(domains[1] == NULL);
r = sd_dhcp6_lease_get_ntp_addrs(lease, &addrs);
assert_se(r == 1);
assert_se(!memcmp(addrs, &msg_advertise[159], r * 16));
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;
}
static void test_client_solicit_cb(sd_dhcp6_client *client, int event,
void *userdata) {
sd_event *e = userdata;
sd_dhcp6_lease *lease;
const struct in6_addr *addrs;
char **domains;
log_debug("/* %s */", __func__);
assert_se(e);
assert_se(event == SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE);
assert_se(sd_dhcp6_client_get_lease(client, &lease) >= 0);
assert_se(sd_dhcp6_lease_get_domains(lease, &domains) == 1);
assert_se(!strcmp("lab.intra", domains[0]));
assert_se(domains[1] == NULL);
assert_se(sd_dhcp6_lease_get_dns(lease, &addrs) == 1);
assert_se(!memcmp(addrs, &msg_advertise[124], 16));
assert_se(sd_dhcp6_lease_get_ntp_addrs(lease, &addrs) == 1);
assert_se(!memcmp(addrs, &msg_advertise[159], 16));
assert_se(sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_DNS_SERVERS) == -EBUSY);
sd_event_exit(e, 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, size_t len) {
_cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL;
bool found_clientid = false, found_iana = false, found_serverid = false,
found_elapsed_time = false, found_fqdn = false;
uint32_t lt_pref, lt_valid;
struct in6_addr addr;
size_t pos = 0;
be32_t val;
log_debug("/* %s */", __func__);
assert_se(request->type == DHCP6_REQUEST);
assert_se(dhcp6_lease_new(&lease) >= 0);
len -= sizeof(DHCP6Message);
while (pos < len) {
DHCP6Option *option = (DHCP6Option *)&request->options[pos];
uint16_t optcode = be16toh(option->code);
uint16_t optlen = be16toh(option->len);
uint8_t *optval = option->data;
switch(optcode) {
case SD_DHCP6_OPTION_CLIENTID:
assert_se(!found_clientid);
found_clientid = true;
assert_se(!memcmp(optval, &test_duid,
sizeof(test_duid)));
break;
case SD_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(option, &lease->ia, NULL) >= 0);
break;
case SD_DHCP6_OPTION_SERVERID:
assert_se(!found_serverid);
found_serverid = true;
assert_se(optlen == 14);
assert_se(!memcmp(&msg_advertise[179], optval, optlen));
break;
case SD_DHCP6_OPTION_ELAPSED_TIME:
assert_se(!found_elapsed_time);
found_elapsed_time = true;
assert_se(optlen == 2);
break;
case SD_DHCP6_OPTION_FQDN:
assert_se(!found_fqdn);
found_fqdn = true;
assert_se(optlen == 17);
assert_se(optval[0] == 0x01);
assert_se(!memcmp(optval + 1, fqdn_wire, sizeof(fqdn_wire)));
break;
}
pos += sizeof(*option) + optlen;
}
assert_se(found_clientid && found_iana && found_serverid &&
found_elapsed_time);
sd_dhcp6_lease_reset_address_iter(lease);
assert_se(sd_dhcp6_lease_get_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_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, size_t len) {
bool found_clientid = false, found_iana = false,
found_elapsed_time = false, found_fqdn = false;
size_t pos = 0;
log_debug("/* %s */", __func__);
assert_se(solicit->type == DHCP6_SOLICIT);
len -= sizeof(DHCP6Message);
while (pos < len) {
DHCP6Option *option = (DHCP6Option *)&solicit->options[pos];
uint16_t optcode = be16toh(option->code);
uint16_t optlen = be16toh(option->len);
uint8_t *optval = option->data;
switch(optcode) {
case SD_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 SD_DHCP6_OPTION_IA_NA:
assert_se(!found_iana);
found_iana = true;
assert_se(optlen == 12);
memcpy(&test_iaid, optval, sizeof(test_iaid));
break;
case SD_DHCP6_OPTION_ELAPSED_TIME:
assert_se(!found_elapsed_time);
found_elapsed_time = true;
assert_se(optlen == 2);
break;
case SD_DHCP6_OPTION_FQDN:
assert_se(!found_fqdn);
found_fqdn = true;
assert_se(optlen == 17);
assert_se(optval[0] == 0x01);
assert_se(!memcmp(optval + 1, fqdn_wire, sizeof(fqdn_wire)));
break;
}
pos += sizeof(*option) + optlen;
}
assert_se(pos == len);
assert_se(found_clientid && found_iana && found_elapsed_time);
return 0;
}
static void test_client_information_cb(sd_dhcp6_client *client, int event,
void *userdata) {
sd_event *e = userdata;
sd_dhcp6_lease *lease;
const struct in6_addr *addrs;
struct in6_addr address = { { { 0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x01 } } };
char **domains;
log_debug("/* %s */", __func__);
assert_se(e);
assert_se(event == SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST);
assert_se(sd_dhcp6_client_get_lease(client, &lease) >= 0);
assert_se(sd_dhcp6_lease_get_domains(lease, &domains) == 1);
assert_se(!strcmp("lab.intra", domains[0]));
assert_se(domains[1] == NULL);
assert_se(sd_dhcp6_lease_get_dns(lease, &addrs) == 1);
assert_se(!memcmp(addrs, &msg_advertise[124], 16));
assert_se(sd_dhcp6_lease_get_ntp_addrs(lease, &addrs) == 1);
assert_se(!memcmp(addrs, &msg_advertise[159], 16));
assert_se(sd_dhcp6_client_set_information_request(client, false) == -EBUSY);
assert_se(sd_dhcp6_client_set_callback(client, NULL, e) >= 0);
assert_se(sd_dhcp6_client_stop(client) >= 0);
assert_se(sd_dhcp6_client_set_information_request(client, false) >= 0);
assert_se(sd_dhcp6_client_set_callback(client,
test_client_solicit_cb, e) >= 0);
assert_se(sd_dhcp6_client_set_local_address(client, &address) >= 0);
assert_se(sd_dhcp6_client_start(client) >= 0);
}
static int test_client_verify_information_request(DHCP6Message *information_request,
size_t len) {
_cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease = NULL;
size_t pos = 0;
bool found_clientid = false, found_elapsed_time = false;
struct in6_addr addr;
uint32_t lt_pref, lt_valid;
log_debug("/* %s */", __func__);
assert_se(information_request->type == DHCP6_INFORMATION_REQUEST);
assert_se(dhcp6_lease_new(&lease) >= 0);
len -= sizeof(DHCP6Message);
while (pos < len) {
DHCP6Option *option = (DHCP6Option *)&information_request->options[pos];
uint16_t optcode = be16toh(option->code);
uint16_t optlen = be16toh(option->len);
uint8_t *optval = option->data;
switch(optcode) {
case SD_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 SD_DHCP6_OPTION_IA_NA:
assert_not_reached("IA TA option must not be present");
break;
case SD_DHCP6_OPTION_SERVERID:
assert_not_reached("Server ID option must not be present");
break;
case SD_DHCP6_OPTION_ELAPSED_TIME:
assert_se(!found_elapsed_time);
found_elapsed_time = true;
assert_se(optlen == 2);
break;
}
pos += sizeof(*option) + optlen;
}
assert_se(pos == len);
assert_se(found_clientid && found_elapsed_time);
sd_dhcp6_lease_reset_address_iter(lease);
assert_se(sd_dhcp6_lease_get_address(lease, &addr, &lt_pref,
&lt_valid) == -ENOMSG);
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;
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;
assert_se(message->transaction_id & 0x00ffffff);
if (test_client_message_num == 0) {
test_client_verify_information_request(message, len);
test_client_send_reply(message);
test_client_message_num++;
} else if (test_client_message_num == 1) {
test_client_verify_solicit(message, len);
test_client_send_advertise(message);
test_client_message_num++;
} else if (test_client_message_num == 2) {
test_client_verify_request(message, len);
test_client_send_reply(message);
test_client_message_num++;
}
return len;
}
int dhcp6_network_bind_udp_socket(int index, struct in6_addr *local_address) {
assert_se(index == test_index);
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0, test_dhcp_fd) < 0)
return -errno;
return test_dhcp_fd[0];
}
static int test_client_solicit(sd_event *e) {
sd_dhcp6_client *client;
usec_t time_now = now(clock_boottime_or_monotonic());
struct in6_addr address = { { { 0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x01 } } };
int val;
log_debug("/* %s */", __func__);
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_ifindex(client, test_index) == 0);
assert_se(sd_dhcp6_client_set_mac(client, (const uint8_t *) &mac_addr,
sizeof (mac_addr),
ARPHRD_ETHER) >= 0);
assert_se(sd_dhcp6_client_set_fqdn(client, "host.lab.intra") == 1);
assert_se(sd_dhcp6_client_get_information_request(client, &val) >= 0);
assert_se(val == 0);
assert_se(sd_dhcp6_client_set_information_request(client, 42) >= 0);
assert_se(sd_dhcp6_client_get_information_request(client, &val) >= 0);
assert_se(val);
assert_se(sd_dhcp6_client_set_callback(client,
test_client_information_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_set_local_address(client, &address) >= 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_(sd_event_unrefp) sd_event *e;
assert_se(sd_event_new(&e) >= 0);
test_setup_logging(LOG_DEBUG);
test_client_basic(e);
test_option(e);
test_option_status(e);
test_advertise_option(e);
test_client_solicit(e);
return 0;
}
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