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authorVinay Kulkarni <vskibum@gmail.com>2016-03-09 21:58:44 -0800
committerVinay Kulkarni <vskibum@gmail.com>2016-03-09 21:58:44 -0800
commitc83321e6d40b294e73e2881e4a98172c4244323b (patch)
tree631e97f505c07f8ece1141e2cac66dbc1fe52cd3 /src/libsystemd-network/sd-dhcp-client.c
parentbd7e03af007c4e857ed0370eba9e903d6b561937 (diff)
DHCP DUID and IAID configurability
Diffstat (limited to 'src/libsystemd-network/sd-dhcp-client.c')
-rw-r--r--src/libsystemd-network/sd-dhcp-client.c48
1 files changed, 46 insertions, 2 deletions
diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 1188b31500..b108e35386 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -82,7 +82,7 @@ struct sd_dhcp_client {
} _packed_ ll;
struct {
/* 255: Node-specific (RFC 4361) */
- uint32_t iaid;
+ be32_t iaid;
struct duid duid;
} _packed_ ns;
struct {
@@ -298,6 +298,51 @@ int sd_dhcp_client_set_client_id(sd_dhcp_client *client, uint8_t type,
return 0;
}
+int sd_dhcp_client_set_iaid_duid(sd_dhcp_client *client, be32_t iaid,
+ size_t duid_len, struct duid *duid) {
+ DHCP_CLIENT_DONT_DESTROY(client);
+ int r;
+ assert_return(client, -EINVAL);
+ zero(client->client_id);
+
+ client->client_id.type = 255;
+
+ /* If IAID is not configured, generate it. */
+ if (iaid == 0) {
+ r = dhcp_identifier_set_iaid(client->index, client->mac_addr,
+ client->mac_addr_len,
+ &client->client_id.ns.iaid);
+ if (r < 0)
+ return r;
+ } else
+ client->client_id.ns.iaid = iaid;
+
+ /* If DUID is not configured, generate DUID-EN. */
+ if (duid_len == 0) {
+ r = dhcp_identifier_set_duid_en(&client->client_id.ns.duid,
+ &duid_len);
+ if (r < 0)
+ return r;
+ } else {
+ r = dhcp_validate_duid_len(client->client_id.type,
+ duid_len - sizeof(client->client_id.type));
+ if (r < 0)
+ return r;
+ memcpy(&client->client_id.ns.duid, duid, duid_len);
+ }
+
+ client->client_id_len = sizeof(client->client_id.type) + duid_len +
+ sizeof(client->client_id.ns.iaid);
+
+ if (!IN_SET(client->state, DHCP_STATE_INIT, DHCP_STATE_STOPPED)) {
+ log_dhcp_client(client, "Configured IAID+DUID, restarting.");
+ client_stop(client, SD_DHCP_CLIENT_EVENT_STOP);
+ sd_dhcp_client_start(client);
+ }
+
+ return 0;
+}
+
int sd_dhcp_client_set_hostname(sd_dhcp_client *client,
const char *hostname) {
char *new_hostname = NULL;
@@ -469,7 +514,6 @@ static int client_message_init(sd_dhcp_client *client, DHCPPacket **ret,
if (client->arp_type == ARPHRD_ETHER)
memcpy(&packet->dhcp.chaddr, &client->mac_addr, ETH_ALEN);
- /* If no client identifier exists, construct an RFC 4361-compliant one */
if (client->client_id_len == 0) {
size_t duid_len;