dhcp-identifier: fix for unaligned write

Reported by Michael Olbrich.

1 files changed, 5 insertions, 4 deletions

diff --git a/src/libsystemd-network/dhcp-identifier.c b/src/libsystemd-network/dhcp-identifier.c
index f7a1492363..70c68ad131 100644
--- a/src/libsystemd-network/dhcp-identifier.c
+++ b/src/libsystemd-network/dhcp-identifier.c
@@ -46,8 +46,9 @@ int dhcp_identifier_set_duid_en(struct duid *duid, size_t *len) {
         if (r < 0)
                 return r;
 
-        duid->type = htobe16(DHCP6_DUID_EN);
-        duid->en.pen = htobe32(SYSTEMD_PEN);
+        unaligned_write_be16(&duid->type, DHCP6_DUID_EN);
+        unaligned_write_be32(&duid->en.pen, SYSTEMD_PEN);
+
         *len = sizeof(duid->type) + sizeof(duid->en);
 
         /* a bit of snake-oil perhaps, but no need to expose the machine-id
@@ -58,7 +59,7 @@ int dhcp_identifier_set_duid_en(struct duid *duid, size_t *len) {
 }
 
 
-int dhcp_identifier_set_iaid(int ifindex, uint8_t *mac, size_t mac_len, uint32_t *_id) {
+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 */
         _cleanup_udev_device_unref_ struct udev_device *device = NULL;
@@ -92,7 +93,7 @@ int dhcp_identifier_set_iaid(int ifindex, uint8_t *mac, size_t mac_len, uint32_t
                 siphash24((uint8_t*)&id, mac, mac_len, HASH_KEY.bytes);
 
         /* fold into 32 bits */
-        *_id = (id & 0xffffffff) ^ (id >> 32);
+        unaligned_write_be32(_id, (id & 0xffffffff) ^ (id >> 32));
 
         return 0;
 }