diff options
Diffstat (limited to 'src/libsystemd-network/dhcp-identifier.c')
| -rw-r--r-- | src/libsystemd-network/dhcp-identifier.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/libsystemd-network/dhcp-identifier.c b/src/libsystemd-network/dhcp-identifier.c index 51ee7bcce4..368525c40a 100644 --- a/src/libsystemd-network/dhcp-identifier.c +++ b/src/libsystemd-network/dhcp-identifier.c @@ -35,6 +35,7 @@ int dhcp_identifier_set_duid_en(struct duid *duid, size_t *len) { sd_id128_t machine_id; + uint64_t hash; int r; assert(duid); @@ -50,8 +51,9 @@ int dhcp_identifier_set_duid_en(struct duid *duid, size_t *len) { *len = sizeof(duid->type) + sizeof(duid->en); /* a bit of snake-oil perhaps, but no need to expose the machine-id - directly */ - siphash24(duid->en.id, &machine_id, sizeof(machine_id), HASH_KEY.bytes); + directly; duid->en.id might not be aligned, so we need to copy */ + siphash24(&hash, &machine_id, sizeof(machine_id), HASH_KEY.bytes); + memcpy(duid->en.id, &hash, sizeof(duid->en.id)); return 0; } @@ -84,10 +86,10 @@ int dhcp_identifier_set_iaid(int ifindex, uint8_t *mac, size_t mac_len, void *_i } if (name) - siphash24((uint8_t*)&id, name, strlen(name), HASH_KEY.bytes); + siphash24(&id, name, strlen(name), HASH_KEY.bytes); else /* fall back to MAC address if no predictable name available */ - siphash24((uint8_t*)&id, mac, mac_len, HASH_KEY.bytes); + siphash24(&id, mac, mac_len, HASH_KEY.bytes); /* fold into 32 bits */ unaligned_write_be32(_id, (id & 0xffffffff) ^ (id >> 32)); |