diff options
Diffstat (limited to '')
| -rw-r--r-- | src/libsystemd-network/dhcp-identifier.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/src/libsystemd-network/dhcp-identifier.c b/src/libsystemd-network/dhcp-identifier.c deleted file mode 100644 index f65cdbe..0000000 --- a/src/libsystemd-network/dhcp-identifier.c +++ /dev/null @@ -1,209 +0,0 @@ -/* SPDX-License-Identifier: LGPL-2.1-or-later */ - -#include <linux/if_infiniband.h> -#include <net/ethernet.h> -#include <net/if_arp.h> - -#include "dhcp-identifier.h" -#include "netif-util.h" -#include "network-common.h" -#include "siphash24.h" -#include "sparse-endian.h" -#include "string-table.h" - -#define HASH_KEY SD_ID128_MAKE(80,11,8c,c2,fe,4a,03,ee,3e,d6,0c,6f,36,39,14,09) -#define APPLICATION_ID SD_ID128_MAKE(a5,0a,d1,12,bf,60,45,77,a2,fb,74,1a,b1,95,5b,03) -#define USEC_2000 ((usec_t) 946684800000000) /* 2000-01-01 00:00:00 UTC */ - -static const char * const duid_type_table[_DUID_TYPE_MAX] = { - [DUID_TYPE_LLT] = "DUID-LLT", - [DUID_TYPE_EN] = "DUID-EN/Vendor", - [DUID_TYPE_LL] = "DUID-LL", - [DUID_TYPE_UUID] = "UUID", -}; - -DEFINE_STRING_TABLE_LOOKUP_TO_STRING(duid_type, DUIDType); - -int dhcp_identifier_set_duid_llt( - const struct hw_addr_data *hw_addr, - uint16_t arp_type, - usec_t t, - struct duid *ret_duid, - size_t *ret_len) { - - uint16_t time_from_2000y; - - assert(hw_addr); - assert(ret_duid); - assert(ret_len); - - if (hw_addr->length == 0) - return -EOPNOTSUPP; - - if (arp_type == ARPHRD_ETHER) - assert_return(hw_addr->length == ETH_ALEN, -EINVAL); - else if (arp_type == ARPHRD_INFINIBAND) - assert_return(hw_addr->length == INFINIBAND_ALEN, -EINVAL); - else - return -EOPNOTSUPP; - - if (t < USEC_2000) - time_from_2000y = 0; - else - time_from_2000y = (uint16_t) (((t - USEC_2000) / USEC_PER_SEC) & 0xffffffff); - - unaligned_write_be16(&ret_duid->type, DUID_TYPE_LLT); - unaligned_write_be16(&ret_duid->llt.htype, arp_type); - unaligned_write_be32(&ret_duid->llt.time, time_from_2000y); - memcpy(ret_duid->llt.haddr, hw_addr->bytes, hw_addr->length); - - *ret_len = offsetof(struct duid, llt.haddr) + hw_addr->length; - - return 0; -} - -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) { - - assert(hw_addr); - assert(ret_duid); - assert(ret_len); - - if (hw_addr->length == 0) - return -EOPNOTSUPP; - - if (arp_type == ARPHRD_ETHER) - assert_return(hw_addr->length == ETH_ALEN, -EINVAL); - else if (arp_type == ARPHRD_INFINIBAND) - assert_return(hw_addr->length == INFINIBAND_ALEN, -EINVAL); - else - return -EOPNOTSUPP; - - unaligned_write_be16(&ret_duid->type, DUID_TYPE_LL); - unaligned_write_be16(&ret_duid->ll.htype, arp_type); - memcpy(ret_duid->ll.haddr, hw_addr->bytes, hw_addr->length); - - *ret_len = offsetof(struct duid, ll.haddr) + hw_addr->length; - - return 0; -} - -int dhcp_identifier_set_duid_en(struct duid *ret_duid, size_t *ret_len) { - sd_id128_t machine_id; - bool test_mode; - uint64_t hash; - int r; - - assert(ret_duid); - assert(ret_len); - - test_mode = network_test_mode_enabled(); - - if (!test_mode) { - r = sd_id128_get_machine(&machine_id); - if (r < 0) - return r; - } else - /* For tests, especially for fuzzers, reproducibility is important. - * Hence, use a static and constant machine ID. - * See 9216fddc5a8ac2742e6cfa7660f95c20ca4f2193. */ - machine_id = SD_ID128_MAKE(01, 02, 03, 04, 05, 06, 07, 08, 09, 0a, 0b, 0c, 0d, 0e, 0f, 10); - - unaligned_write_be16(&ret_duid->type, DUID_TYPE_EN); - unaligned_write_be32(&ret_duid->en.pen, SYSTEMD_PEN); - - /* a bit of snake-oil perhaps, but no need to expose the machine-id - * directly; duid->en.id might not be aligned, so we need to copy */ - hash = htole64(siphash24(&machine_id, sizeof(machine_id), HASH_KEY.bytes)); - memcpy(ret_duid->en.id, &hash, sizeof(hash)); - - *ret_len = offsetof(struct duid, en.id) + sizeof(hash); - - if (test_mode) - assert_se(memcmp(ret_duid, (const uint8_t[]) { 0x00, 0x02, 0x00, 0x00, 0xab, 0x11, 0x61, 0x77, 0x40, 0xde, 0x13, 0x42, 0xc3, 0xa2 }, *ret_len) == 0); - - return 0; -} - -int dhcp_identifier_set_duid_uuid(struct duid *ret_duid, size_t *ret_len) { - sd_id128_t machine_id; - int r; - - assert(ret_duid); - assert(ret_len); - - r = sd_id128_get_machine_app_specific(APPLICATION_ID, &machine_id); - if (r < 0) - return r; - - unaligned_write_be16(&ret_duid->type, DUID_TYPE_UUID); - memcpy(&ret_duid->uuid.uuid, &machine_id, sizeof(machine_id)); - - *ret_len = offsetof(struct duid, uuid.uuid) + sizeof(machine_id); - - return 0; -} - -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) { - - 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_DATA_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( - sd_device *dev, - const struct hw_addr_data *hw_addr, - bool legacy_unstable_byteorder, - void *ret) { - - const char *name = NULL; - uint32_t id32; - uint64_t id; - - assert(hw_addr); - assert(ret); - - if (dev) - name = net_get_persistent_name(dev); - if (name) - id = siphash24(name, strlen(name), HASH_KEY.bytes); - else - /* fall back to MAC address if no predictable name available */ - id = siphash24(hw_addr->bytes, hw_addr->length, HASH_KEY.bytes); - - id32 = (id & 0xffffffff) ^ (id >> 32); - - if (legacy_unstable_byteorder) - /* for historical reasons (a bug), the bits were swapped and thus - * the result was endianness dependent. Preserve that behavior. */ - id32 = bswap_32(id32); - else - /* the fixed behavior returns a stable byte order. Since LE is expected - * to be more common, swap the bytes on LE to give the same as legacy - * behavior. */ - id32 = be32toh(id32); - - unaligned_write_ne32(ret, id32); - return 0; -} |