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authorTom Gundersen <teg@jklm.no>2014-10-02 16:25:08 +0200
committerTom Gundersen <teg@jklm.no>2014-10-02 19:07:30 +0200
commitfe4b2156256c5bdf52341576571ce9f095d9f085 (patch)
treeb1046ef4c512bf816a348d12c318bffd5e382ed2
parentebe207d4acf38165adbc45298662982eecdb9e9f (diff)
sd-dhcp6: do basic sanity-checking of supplied DUID
-rw-r--r--src/libsystemd-network/sd-dhcp6-client.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 42ad41887d..6ea68c915f 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -69,11 +69,26 @@ struct sd_dhcp6_client {
void *userdata;
union {
struct {
+ uint16_t type; /* DHCP6_DUID_LLT */
+ uint16_t htype;
+ uint32_t time;
+ uint8_t haddr[0];
+ } _packed_ llt;
+ struct {
uint16_t type; /* DHCP6_DUID_EN */
uint32_t pen;
uint8_t id[8];
} _packed_ en;
struct {
+ uint16_t type; /* DHCP6_DUID_LL */
+ uint16_t htype;
+ uint8_t haddr[0];
+ } _packed_ ll;
+ struct {
+ uint16_t type; /* DHCP6_DUID_UUID */
+ sd_id128_t uuid;
+ } _packed_ uuid;
+ struct {
uint16_t type;
uint8_t data[MAX_DUID_LEN];
} _packed_ raw;
@@ -165,6 +180,28 @@ int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint16_t type, uint8_t *du
assert_return(duid, -EINVAL);
assert_return(duid_len > 0 && duid_len <= MAX_DUID_LEN, -EINVAL);
+ switch (type) {
+ case DHCP6_DUID_LLT:
+ if (duid_len <= sizeof(client->duid.llt))
+ return -EINVAL;
+ break;
+ case DHCP6_DUID_EN:
+ if (duid_len != sizeof(client->duid.en))
+ return -EINVAL;
+ break;
+ case DHCP6_DUID_LL:
+ if (duid_len <= sizeof(client->duid.ll))
+ return -EINVAL;
+ break;
+ case DHCP6_DUID_UUID:
+ if (duid_len != sizeof(client->duid.uuid))
+ return -EINVAL;
+ break;
+ default:
+ /* accept unknown type in order to be forward compatible */
+ break;
+ }
+
client->duid.raw.type = htobe16(type);
memcpy(&client->duid.raw.data, duid, duid_len);
client->duid_len = duid_len;