diff options
Diffstat (limited to 'src/libsystemd-network/dhcp-identifier.c')
| -rw-r--r-- | src/libsystemd-network/dhcp-identifier.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/src/libsystemd-network/dhcp-identifier.c b/src/libsystemd-network/dhcp-identifier.c index 7d9cad2a70..d7ae865557 100644 --- a/src/libsystemd-network/dhcp-identifier.c +++ b/src/libsystemd-network/dhcp-identifier.c @@ -19,24 +19,23 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ - -#include "sd-id128.h" #include "libudev.h" -#include "udev-util.h" - -#include "virt.h" -#include "sparse-endian.h" -#include "siphash24.h" +#include "sd-id128.h" -#include "dhcp6-protocol.h" #include "dhcp-identifier.h" +#include "dhcp6-protocol.h" #include "network-internal.h" +#include "siphash24.h" +#include "sparse-endian.h" +#include "udev-util.h" +#include "virt.h" #define SYSTEMD_PEN 43793 #define HASH_KEY SD_ID128_MAKE(80,11,8c,c2,fe,4a,03,ee,3e,d6,0c,6f,36,39,14,09) int dhcp_identifier_set_duid_en(struct duid *duid, size_t *len) { sd_id128_t machine_id; + uint64_t hash; int r; assert(duid); @@ -52,13 +51,13 @@ 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 */ + hash = htole64(siphash24(&machine_id, sizeof(machine_id), HASH_KEY.bytes)); + memcpy(duid->en.id, &hash, sizeof(duid->en.id)); return 0; } - int dhcp_identifier_set_iaid(int ifindex, uint8_t *mac, size_t mac_len, void *_id) { /* name is a pointer to memory in the udev_device struct, so must have the same scope */ @@ -87,10 +86,12 @@ 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); + id = siphash24(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); + id = siphash24(mac, mac_len, HASH_KEY.bytes); + + id = htole64(id); /* fold into 32 bits */ unaligned_write_be32(_id, (id & 0xffffffff) ^ (id >> 32)); |