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Diffstat (limited to 'src/libsystemd-network/dhcp-identifier.h')
-rw-r--r--src/libsystemd-network/dhcp-identifier.h41
1 files changed, 40 insertions, 1 deletions
diff --git a/src/libsystemd-network/dhcp-identifier.h b/src/libsystemd-network/dhcp-identifier.h
index 93f06f5938..cb953cb416 100644
--- a/src/libsystemd-network/dhcp-identifier.h
+++ b/src/libsystemd-network/dhcp-identifier.h
@@ -25,13 +25,23 @@
#include "sparse-endian.h"
#include "unaligned.h"
+typedef enum DHCPDUIDType {
+ DHCP_DUID_TYPE_RAW = 0,
+ DHCP_DUID_TYPE_LLT = 1,
+ DHCP_DUID_TYPE_EN = 2,
+ DHCP_DUID_TYPE_LL = 3,
+ DHCP_DUID_TYPE_UUID = 4,
+ _DHCP_DUID_TYPE_MAX,
+ _DHCP_DUID_TYPE_INVALID = -1,
+} DHCPDUIDType;
+
/* RFC 3315 section 9.1:
* A DUID can be no more than 128 octets long (not including the type code).
*/
#define MAX_DUID_LEN 128
struct duid {
- uint16_t type;
+ be16_t type;
union {
struct {
/* DHCP6_DUID_LLT */
@@ -61,3 +71,32 @@ struct duid {
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, void *_id);
+
+static inline int dhcp_validate_duid_len(be16_t duid_type, size_t duid_len) {
+ struct duid d;
+
+ assert_return(duid_len > 0 && duid_len <= MAX_DUID_LEN, -EINVAL);
+
+ switch (be16toh(duid_type)) {
+ case DHCP_DUID_TYPE_LLT:
+ if (duid_len <= sizeof(d.llt))
+ return -EINVAL;
+ break;
+ case DHCP_DUID_TYPE_EN:
+ if (duid_len != sizeof(d.en))
+ return -EINVAL;
+ break;
+ case DHCP_DUID_TYPE_LL:
+ if (duid_len <= sizeof(d.ll))
+ return -EINVAL;
+ break;
+ case DHCP_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;
+}