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Code

network: introduce per DUID type setters

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No functional change, just refactoring.
This commit is contained in:
Yu Watanabe 2023-08-22 14:22:03 +09:00
parent 6ed69be98a
commit 53488ea352
9 changed files with 287 additions and 196 deletions
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75
src/libsystemd-network/dhcp-identifier.c
View File

@ -23,43 +23,7 @@ static const char * const duid_type_table[_DUID_TYPE_MAX] = {
DEFINE_STRING_TABLE_LOOKUP_TO_STRING(duid_type, DUIDType);
int dhcp_validate_duid_len(DUIDType duid_type, size_t duid_len, bool strict) {
struct duid d;
assert_cc(sizeof(d.raw) >= MAX_DUID_LEN);
if (duid_len > MAX_DUID_LEN)
return -EINVAL;
if (!strict)
/* Strict validation is not requested. We only ensure that the
* DUID is not too long. */
return 0;
switch (duid_type) {
case DUID_TYPE_LLT:
if (duid_len <= sizeof(d.llt))
return -EINVAL;
break;
case DUID_TYPE_EN:
if (duid_len != sizeof(d.en))
return -EINVAL;
break;
case DUID_TYPE_LL:
if (duid_len <= sizeof(d.ll))
return -EINVAL;
break;
case DUID_TYPE_UUID:
if (duid_len != sizeof(d.uuid))
return -EINVAL;
break;
default:
/* accept unknown type in order to be forward compatible */
break;
}
return 0;
}
static int dhcp_identifier_set_duid_llt(
int dhcp_identifier_set_duid_llt(
const struct hw_addr_data *hw_addr,
uint16_t arp_type,
usec_t t,
@ -97,7 +61,7 @@ static int dhcp_identifier_set_duid_llt(
return 0;
}
static int dhcp_identifier_set_duid_ll(
int dhcp_identifier_set_duid_ll(
const struct hw_addr_data *hw_addr,
uint16_t arp_type,
struct duid *ret_duid,
@ -160,7 +124,7 @@ int dhcp_identifier_set_duid_en(bool test_mode, struct duid *ret_duid, size_t *r
return 0;
}
static int dhcp_identifier_set_duid_uuid(struct duid *ret_duid, size_t *ret_len) {
int dhcp_identifier_set_duid_uuid(struct duid *ret_duid, size_t *ret_len) {
sd_id128_t machine_id;
int r;
@ -179,27 +143,28 @@ static int dhcp_identifier_set_duid_uuid(struct duid *ret_duid, size_t *ret_len)
return 0;
}
int dhcp_identifier_set_duid(
int dhcp_identifier_set_duid_raw(
DUIDType duid_type,
const struct hw_addr_data *hw_addr,
uint16_t arp_type,
usec_t llt_time,
bool test_mode,
const uint8_t *buf,
size_t buf_len,
struct duid *ret_duid,
size_t *ret_len) {
switch (duid_type) {
case DUID_TYPE_LLT:
return dhcp_identifier_set_duid_llt(hw_addr, arp_type, llt_time, ret_duid, ret_len);
case DUID_TYPE_EN:
return dhcp_identifier_set_duid_en(test_mode, ret_duid, ret_len);
case DUID_TYPE_LL:
return dhcp_identifier_set_duid_ll(hw_addr, arp_type, ret_duid, ret_len);
case DUID_TYPE_UUID:
return dhcp_identifier_set_duid_uuid(ret_duid, ret_len);
default:
assert(buf || buf_len == 0);
assert(ret_duid);
assert(ret_len);
if (duid_type < 0 || duid_type > UINT16_MAX)
return -EINVAL;
}
if (buf_len > MAX_DUID_LEN)
return -EINVAL;
unaligned_write_be16(&ret_duid->type, duid_type);
memcpy_safe(ret_duid->raw.data, buf, buf_len);
*ret_len = offsetof(struct duid, raw.data) + buf_len;
return 0;
}
int dhcp_identifier_set_iaid(

20
src/libsystemd-network/dhcp-identifier.h
View File

@ -57,13 +57,23 @@ struct duid {
} _packed_;
int dhcp_validate_duid_len(DUIDType duid_type, size_t duid_len, bool strict);
int dhcp_identifier_set_duid_en(bool test_mode, struct duid *ret_duid, size_t *ret_len);
int dhcp_identifier_set_duid(
DUIDType duid_type,
int dhcp_identifier_set_duid_llt(
const struct hw_addr_data *hw_addr,
uint16_t arp_type,
usec_t llt_time,
bool test_mode,
usec_t t,
struct duid *ret_duid,
size_t *ret_len);
int dhcp_identifier_set_duid_ll(
const struct hw_addr_data *hw_addr,
uint16_t arp_type,
struct duid *ret_duid,
size_t *ret_len);
int dhcp_identifier_set_duid_en(bool test_mode, struct duid *ret_duid, size_t *ret_len);
int dhcp_identifier_set_duid_uuid(struct duid *ret_duid, size_t *ret_len);
int dhcp_identifier_set_duid_raw(
DUIDType duid_type,
const uint8_t *buf,
size_t buf_len,
struct duid *ret_duid,
size_t *ret_len);
int dhcp_identifier_set_iaid(

180
src/libsystemd-network/sd-dhcp-client.c
View File

@ -402,27 +402,15 @@ int sd_dhcp_client_set_client_id(
* without further modification. Otherwise, if duid_type is supported, DUID
* is set based on that type. Otherwise, an error is returned.
*/
static int dhcp_client_set_iaid_duid_internal(
static int dhcp_client_set_iaid(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid,
DUIDType duid_type,
const void *duid,
size_t duid_len,
usec_t llt_time) {
uint32_t iaid) {
size_t len;
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp_client_is_running(client), -EBUSY);
assert_return(duid_len == 0 || duid, -EINVAL);
if (duid) {
r = dhcp_validate_duid_len(duid_type, duid_len, true);
if (r < 0)
return log_dhcp_client_errno(client, r, "Failed to validate length of DUID: %m");
}
zero(client->client_id);
client->client_id.type = 255;
@ -437,46 +425,132 @@ static int dhcp_client_set_iaid_duid_internal(
return log_dhcp_client_errno(client, r, "Failed to set IAID: %m");
}
if (duid) {
client->client_id.ns.duid.type = htobe16(duid_type);
memcpy(&client->client_id.ns.duid.raw.data, duid, duid_len);
len = sizeof(client->client_id.ns.duid.type) + duid_len;
} else {
r = dhcp_identifier_set_duid(duid_type, &client->hw_addr,
client->arp_type, llt_time, client->test_mode,
&client->client_id.ns.duid, &len);
if (r == -EOPNOTSUPP)
return log_dhcp_client_errno(client, r,
"Failed to set %s. MAC address is not set or "
"interface type is not supported.",
duid_type_to_string(duid_type));
if (r < 0)
return log_dhcp_client_errno(client, r, "Failed to set %s: %m",
duid_type_to_string(duid_type));
}
client->client_id_len = sizeof(client->client_id.type) + sizeof(client->client_id.ns.iaid) + len;
return 0;
}
int sd_dhcp_client_set_iaid_duid(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid,
uint16_t duid_type,
const void *duid,
size_t duid_len) {
return dhcp_client_set_iaid_duid_internal(client, iaid_set, iaid, duid_type, duid, duid_len, 0);
}
int sd_dhcp_client_set_iaid_duid_llt(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid,
usec_t llt_time) {
return dhcp_client_set_iaid_duid_internal(client, iaid_set, iaid, DUID_TYPE_LLT, NULL, 0, llt_time);
size_t len;
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp_client_is_running(client), -EBUSY);
r = dhcp_client_set_iaid(client, iaid_set, iaid);
if (r < 0)
return r;
r = dhcp_identifier_set_duid_llt(&client->hw_addr, client->arp_type, llt_time, &client->client_id.ns.duid, &len);
if (r < 0)
return log_dhcp_client_errno(client, r, "Failed to set DUID-LLT: %m");
client->client_id_len = sizeof(client->client_id.type) + sizeof(client->client_id.ns.iaid) + len;
return 0;
}
int sd_dhcp_client_set_iaid_duid_ll(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid) {
size_t len;
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp_client_is_running(client), -EBUSY);
r = dhcp_client_set_iaid(client, iaid_set, iaid);
if (r < 0)
return r;
r = dhcp_identifier_set_duid_ll(&client->hw_addr, client->arp_type, &client->client_id.ns.duid, &len);
if (r < 0)
return log_dhcp_client_errno(client, r, "Failed to set DUID-LL: %m");
client->client_id_len = sizeof(client->client_id.type) + sizeof(client->client_id.ns.iaid) + len;
return 0;
}
int sd_dhcp_client_set_iaid_duid_en(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid) {
size_t len;
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp_client_is_running(client), -EBUSY);
r = dhcp_client_set_iaid(client, iaid_set, iaid);
if (r < 0)
return r;
r = dhcp_identifier_set_duid_en(client->test_mode, &client->client_id.ns.duid, &len);
if (r < 0)
return log_dhcp_client_errno(client, r, "Failed to set DUID-EN: %m");
client->client_id_len = sizeof(client->client_id.type) + sizeof(client->client_id.ns.iaid) + len;
return 0;
}
int sd_dhcp_client_set_iaid_duid_uuid(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid) {
size_t len;
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp_client_is_running(client), -EBUSY);
r = dhcp_client_set_iaid(client, iaid_set, iaid);
if (r < 0)
return r;
r = dhcp_identifier_set_duid_uuid(&client->client_id.ns.duid, &len);
if (r < 0)
return log_dhcp_client_errno(client, r, "Failed to set DUID-UUID: %m");
client->client_id_len = sizeof(client->client_id.type) + sizeof(client->client_id.ns.iaid) + len;
return 0;
}
int sd_dhcp_client_set_iaid_duid_raw(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid,
uint16_t duid_type,
const uint8_t *duid,
size_t duid_len) {
size_t len;
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp_client_is_running(client), -EBUSY);
assert_return(duid || duid_len == 0, -EINVAL);
r = dhcp_client_set_iaid(client, iaid_set, iaid);
if (r < 0)
return r;
r = dhcp_identifier_set_duid_raw(duid_type, duid, duid_len, &client->client_id.ns.duid, &len);
if (r < 0)
return log_dhcp_client_errno(client, r, "Failed to set DUID: %m");
client->client_id_len = sizeof(client->client_id.type) + sizeof(client->client_id.ns.iaid) + len;
return 0;
}
void dhcp_client_set_test_mode(sd_dhcp_client *client, bool test_mode) {
@ -798,21 +872,9 @@ static int client_message_init(
/* If no client identifier exists, construct an RFC 4361-compliant one */
if (client->client_id_len == 0) {
size_t duid_len;
client->client_id.type = 255;
r = dhcp_identifier_set_iaid(client->dev, &client->hw_addr,
/* legacy_unstable_byteorder = */ true,
&client->client_id.ns.iaid);
r = sd_dhcp_client_set_iaid_duid_en(client, /* iaid_set = */ false, /* iaid = */ 0);
if (r < 0)
return r;
r = dhcp_identifier_set_duid_en(client->test_mode, &client->client_id.ns.duid, &duid_len);
if (r < 0)
return r;
client->client_id_len = sizeof(client->client_id.type) + sizeof(client->client_id.ns.iaid) + duid_len;
}
/* Some DHCP servers will refuse to issue an DHCP lease if the Client

96
src/libsystemd-network/sd-dhcp6-client.c
View File

@ -190,60 +190,70 @@ static int client_ensure_duid(sd_dhcp6_client *client) {
* without further modification. Otherwise, if duid_type is supported, DUID
* is set based on that type. Otherwise, an error is returned.
*/
static int dhcp6_client_set_duid_internal(
sd_dhcp6_client *client,
DUIDType duid_type,
const void *duid,
size_t duid_len,
usec_t llt_time) {
int sd_dhcp6_client_set_duid_llt(sd_dhcp6_client *client, uint64_t llt_time) {
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp6_client_is_running(client), -EBUSY);
assert_return(duid_len == 0 || duid, -EINVAL);
if (duid) {
r = dhcp_validate_duid_len(duid_type, duid_len, true);
if (r < 0) {
r = dhcp_validate_duid_len(duid_type, duid_len, false);
if (r < 0)
return log_dhcp6_client_errno(client, r, "Failed to validate length of DUID: %m");
log_dhcp6_client(client, "Using DUID of type %i of incorrect length, proceeding.", duid_type);
}
client->duid.type = htobe16(duid_type);
memcpy(&client->duid.raw.data, duid, duid_len);
client->duid_len = sizeof(client->duid.type) + duid_len;
} else {
r = dhcp_identifier_set_duid(duid_type, &client->hw_addr, client->arp_type, llt_time,
client->test_mode, &client->duid, &client->duid_len);
if (r == -EOPNOTSUPP)
return log_dhcp6_client_errno(client, r,
"Failed to set %s. MAC address is not set or "
"interface type is not supported.",
duid_type_to_string(duid_type));
if (r < 0)
return log_dhcp6_client_errno(client, r, "Failed to set %s: %m",
duid_type_to_string(duid_type));
}
r = dhcp_identifier_set_duid_llt(&client->hw_addr, client->arp_type, llt_time, &client->duid, &client->duid_len);
if (r < 0)
return log_dhcp6_client_errno(client, r, "Failed to set DUID-LLT: %m");
return 0;
}
int sd_dhcp6_client_set_duid(
sd_dhcp6_client *client,
uint16_t duid_type,
const void *duid,
size_t duid_len) {
return dhcp6_client_set_duid_internal(client, duid_type, duid, duid_len, 0);
int sd_dhcp6_client_set_duid_ll(sd_dhcp6_client *client) {
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp6_client_is_running(client), -EBUSY);
r = dhcp_identifier_set_duid_ll(&client->hw_addr, client->arp_type, &client->duid, &client->duid_len);
if (r < 0)
return log_dhcp6_client_errno(client, r, "Failed to set DUID-LL: %m");
return 0;
}
int sd_dhcp6_client_set_duid_llt(
sd_dhcp6_client *client,
usec_t llt_time) {
return dhcp6_client_set_duid_internal(client, DUID_TYPE_LLT, NULL, 0, llt_time);
int sd_dhcp6_client_set_duid_en(sd_dhcp6_client *client) {
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp6_client_is_running(client), -EBUSY);
r = dhcp_identifier_set_duid_en(client->test_mode, &client->duid, &client->duid_len);
if (r < 0)
return log_dhcp6_client_errno(client, r, "Failed to set DUID-EN: %m");
return 0;
}
int sd_dhcp6_client_set_duid_uuid(sd_dhcp6_client *client) {
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp6_client_is_running(client), -EBUSY);
r = dhcp_identifier_set_duid_uuid(&client->duid, &client->duid_len);
if (r < 0)
return log_dhcp6_client_errno(client, r, "Failed to set DUID-UUID: %m");
return 0;
}
int sd_dhcp6_client_set_duid_raw(sd_dhcp6_client *client, uint16_t duid_type, const uint8_t *duid, size_t duid_len) {
int r;
assert_return(client, -EINVAL);
assert_return(!sd_dhcp6_client_is_running(client), -EBUSY);
assert_return(duid || duid_len == 0, -EINVAL);
r = dhcp_identifier_set_duid_raw(duid_type, duid, duid_len, &client->duid, &client->duid_len);
if (r < 0)
return log_dhcp6_client_errno(client, r, "Failed to set DUID: %m");
return 0;
}
int sd_dhcp6_client_duid_as_string(

4
src/libsystemd-network/test-dhcp6-client.c
View File

@ -428,7 +428,7 @@ TEST(client_parse_message_issue_22099) {
assert_se(sd_dhcp6_client_new(&client) >= 0);
assert_se(sd_dhcp6_client_set_iaid(client, 0xcc59117b) >= 0);
assert_se(sd_dhcp6_client_set_duid(client, 2, duid, sizeof(duid)) >= 0);
assert_se(sd_dhcp6_client_set_duid_raw(client, 2, duid, sizeof(duid)) >= 0);
assert_se(dhcp6_lease_new_from_message(client, (const DHCP6Message*) msg, sizeof(msg), NULL, NULL, &lease) >= 0);
}
@ -472,7 +472,7 @@ TEST(client_parse_message_issue_24002) {
assert_se(sd_dhcp6_client_new(&client) >= 0);
assert_se(sd_dhcp6_client_set_iaid(client, 0xaabbccdd) >= 0);
assert_se(sd_dhcp6_client_set_duid(client, 2, duid, sizeof(duid)) >= 0);
assert_se(sd_dhcp6_client_set_duid_raw(client, 2, duid, sizeof(duid)) >= 0);
assert_se(dhcp6_lease_new_from_message(client, (const DHCP6Message*) msg, sizeof(msg), NULL, NULL, &lease) >= 0);
}

44
src/network/networkd-dhcp4.c
View File

@ -1326,20 +1326,42 @@ static int dhcp4_set_client_identifier(Link *link) {
/* If configured, apply user specified DUID and IAID */
const DUID *duid = link_get_dhcp4_duid(link);
if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0)
r = sd_dhcp_client_set_iaid_duid_llt(link->dhcp_client,
if (duid->raw_data_len == 0)
switch (duid->type) {
case DUID_TYPE_LLT:
r = sd_dhcp_client_set_iaid_duid_llt(link->dhcp_client,
link->network->dhcp_iaid_set,
link->network->dhcp_iaid,
duid->llt_time);
break;
case DUID_TYPE_LL:
r = sd_dhcp_client_set_iaid_duid_ll(link->dhcp_client,
link->network->dhcp_iaid_set,
link->network->dhcp_iaid);
break;
case DUID_TYPE_EN:
r = sd_dhcp_client_set_iaid_duid_en(link->dhcp_client,
link->network->dhcp_iaid_set,
link->network->dhcp_iaid);
break;
case DUID_TYPE_UUID:
r = sd_dhcp_client_set_iaid_duid_uuid(link->dhcp_client,
link->network->dhcp_iaid_set,
link->network->dhcp_iaid);
break;
default:
r = sd_dhcp_client_set_iaid_duid_raw(link->dhcp_client,
link->network->dhcp_iaid_set,
link->network->dhcp_iaid,
duid->type, NULL, 0);
}
else
r = sd_dhcp_client_set_iaid_duid_raw(link->dhcp_client,
link->network->dhcp_iaid_set,
link->network->dhcp_iaid,
duid->llt_time);
else
r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
link->network->dhcp_iaid_set,
link->network->dhcp_iaid,
duid->type,
duid->raw_data_len > 0 ? duid->raw_data : NULL,
duid->raw_data_len);
duid->type, duid->raw_data, duid->raw_data_len);
if (r < 0)
return log_link_debug_errno(link, r, "DHCPv4 CLIENT: Failed to set IAID+DUID: %m");
return r;
break;
}
case DHCP_CLIENT_ID_MAC: {

25
src/network/networkd-dhcp6.c
View File

@ -555,13 +555,26 @@ static int dhcp6_set_identifier(Link *link, sd_dhcp6_client *client) {
}
duid = link_get_dhcp6_duid(link);
if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0)
r = sd_dhcp6_client_set_duid_llt(client, duid->llt_time);
if (duid->raw_data_len == 0)
switch (duid->type) {
case DUID_TYPE_LLT:
r = sd_dhcp6_client_set_duid_llt(client, duid->llt_time);
break;
case DUID_TYPE_LL:
r = sd_dhcp6_client_set_duid_ll(client);
break;
case DUID_TYPE_EN:
r = sd_dhcp6_client_set_duid_en(client);
break;
case DUID_TYPE_UUID:
r = sd_dhcp6_client_set_duid_uuid(client);
break;
default:
r = sd_dhcp6_client_set_duid_raw(client, duid->type, NULL, 0);
}
else
r = sd_dhcp6_client_set_duid(client,
duid->type,
duid->raw_data_len > 0 ? duid->raw_data : NULL,
duid->raw_data_len);
r = sd_dhcp6_client_set_duid_raw(client, duid->type, duid->raw_data, duid->raw_data_len);
if (r < 0)
return r;

26
src/systemd/sd-dhcp-client.h
View File

@ -257,18 +257,30 @@ int sd_dhcp_client_set_client_id(
uint8_t type,
const uint8_t *data,
size_t data_len);
__extension__ int sd_dhcp_client_set_iaid_duid(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid,
uint16_t duid_type,
const void *duid,
size_t duid_len);
__extension__ int sd_dhcp_client_set_iaid_duid_llt(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid,
uint64_t llt_time);
__extension__ int sd_dhcp_client_set_iaid_duid_ll(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid);
__extension__ int sd_dhcp_client_set_iaid_duid_en(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid);
__extension__ int sd_dhcp_client_set_iaid_duid_uuid(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid);
__extension__ int sd_dhcp_client_set_iaid_duid_raw(
sd_dhcp_client *client,
bool iaid_set,
uint32_t iaid,
uint16_t duid_type,
const uint8_t *duid,
size_t duid_len);
int sd_dhcp_client_get_client_id(
sd_dhcp_client *client,
uint8_t *ret_type,

13
src/systemd/sd-dhcp6-client.h
View File

@ -211,14 +211,11 @@ int sd_dhcp6_client_set_mac(
const uint8_t *addr,
size_t addr_len,
uint16_t arp_type);
int sd_dhcp6_client_set_duid(
sd_dhcp6_client *client,
uint16_t duid_type,
const void *duid,
size_t duid_len);
int sd_dhcp6_client_set_duid_llt(
sd_dhcp6_client *client,
uint64_t llt_time);
int sd_dhcp6_client_set_duid_llt(sd_dhcp6_client *client, uint64_t llt_time);
int sd_dhcp6_client_set_duid_ll(sd_dhcp6_client *client);
int sd_dhcp6_client_set_duid_en(sd_dhcp6_client *client);
int sd_dhcp6_client_set_duid_uuid(sd_dhcp6_client *client);
int sd_dhcp6_client_set_duid_raw(sd_dhcp6_client *client, uint16_t duid_type, const uint8_t *duid, size_t duid_len);
int sd_dhcp6_client_set_iaid(
sd_dhcp6_client *client,
uint32_t iaid);