#include <net/ethernet.h>
#include <net/if_arp.h>
#include <linux/if_infiniband.h>
-#include <netinet/ether.h>
-#include <sys/param.h>
#include <sys/ioctl.h>
#include "util.h"
-#include "list.h"
#include "refcnt.h"
#include "async.h"
#include "dhcp-protocol.h"
#include "dhcp-internal.h"
#include "dhcp-lease-internal.h"
+#include "dhcp-identifier.h"
#include "sd-dhcp-client.h"
-#define MAX_CLIENT_ID_LEN 64 /* Arbitrary limit */
+#define MAX_CLIENT_ID_LEN (sizeof(uint32_t) + MAX_DUID_LEN) /* Arbitrary limit */
#define MAX_MAC_ADDR_LEN INFINIBAND_ALEN
struct sd_dhcp_client {
uint8_t mac_addr[MAX_MAC_ADDR_LEN];
size_t mac_addr_len;
uint16_t arp_type;
- union {
- struct {
- uint8_t type; /* 0: Generic (non-LL) (RFC 2132) */
- uint8_t data[MAX_CLIENT_ID_LEN];
- } _packed_ gen;
- struct {
- uint8_t type; /* 1: Ethernet Link-Layer (RFC 2132) */
- uint8_t haddr[ETH_ALEN];
- } _packed_ eth;
- struct {
- uint8_t type; /* 2 - 254: ARP/Link-Layer (RFC 2132) */
- uint8_t haddr[0];
- } _packed_ ll;
- struct {
- uint8_t type; /* 255: Node-specific (RFC 4361) */
- uint8_t iaid[4];
- uint8_t duid[MAX_CLIENT_ID_LEN - 4];
- } _packed_ ns;
- struct {
- uint8_t type;
- uint8_t data[MAX_CLIENT_ID_LEN];
- } _packed_ raw;
- } client_id;
+ struct {
+ uint8_t type;
+ union {
+ struct {
+ /* 0: Generic (non-LL) (RFC 2132) */
+ uint8_t data[MAX_CLIENT_ID_LEN];
+ } _packed_ gen;
+ struct {
+ /* 1: Ethernet Link-Layer (RFC 2132) */
+ uint8_t haddr[ETH_ALEN];
+ } _packed_ eth;
+ struct {
+ /* 2 - 254: ARP/Link-Layer (RFC 2132) */
+ uint8_t haddr[0];
+ } _packed_ ll;
+ struct {
+ /* 255: Node-specific (RFC 4361) */
+ uint32_t iaid;
+ struct duid duid;
+ } _packed_ ns;
+ struct {
+ uint8_t data[MAX_CLIENT_ID_LEN];
+ } _packed_ raw;
+ };
+ } _packed_ client_id;
size_t client_id_len;
char *hostname;
char *vendor_class_identifier;
*data = NULL;
*data_len = 0;
if (client->client_id_len) {
- *type = client->client_id.raw.type;
+ *type = client->client_id.type;
*data = client->client_id.raw.data;
- *data_len = client->client_id_len -
- sizeof (client->client_id.raw.type);
+ *data_len = client->client_id_len - sizeof(client->client_id.type);
}
return 0;
break;
}
- if (client->client_id_len == data_len + sizeof (client->client_id.raw.type) &&
- client->client_id.raw.type == type &&
+ if (client->client_id_len == data_len + sizeof(client->client_id.type) &&
+ client->client_id.type == type &&
memcmp(&client->client_id.raw.data, data, data_len) == 0)
return 0;
client_stop(client, DHCP_EVENT_STOP);
}
- client->client_id.raw.type = type;
+ client->client_id.type = type;
memcpy(&client->client_id.raw.data, data, data_len);
- client->client_id_len = data_len + sizeof (client->client_id.raw.type);
+ client->client_id_len = data_len + sizeof (client->client_id.type);
if (need_restart && client->state != DHCP_STATE_STOPPED)
sd_dhcp_client_start(client);
if (client->arp_type == ARPHRD_ETHER)
memcpy(&packet->dhcp.chaddr, &client->mac_addr, ETH_ALEN);
- /* If no client identifier exists, construct one from an ethernet
- address if present */
- if (client->client_id_len == 0 && client->arp_type == ARPHRD_ETHER) {
- client->client_id.eth.type = ARPHRD_ETHER;
- memcpy(&client->client_id.eth.haddr, &client->mac_addr, ETH_ALEN);
- client->client_id_len = sizeof (client->client_id.eth);
+ /* If no client identifier exists, construct an RFC 4361-compliant one */
+ if (client->client_id_len == 0) {
+ size_t duid_len;
+
+ client->client_id.type = 255;
+
+ r = dhcp_identifier_set_iaid(client->index, client->mac_addr, client->mac_addr_len, &client->client_id.ns.iaid);
+ if (r < 0)
+ return r;
+
+ r = dhcp_identifier_set_duid_en(&client->client_id.ns.duid, &duid_len);
+ if (r < 0)
+ return r;
+
+ client->client_id_len = sizeof(client->client_id.type) + sizeof(client->client_id.ns.iaid) + duid_len;
}
/* Some DHCP servers will refuse to issue an DHCP lease if the Client
r = dhcp_option_append(&packet->dhcp, optlen, &optoffset, 0,
DHCP_OPTION_CLIENT_IDENTIFIER,
client->client_id_len,
- &client->client_id.raw);
+ &client->client_id);
if (r < 0)
return r;
}
Note (from ConnMan): Some DHCP servers will send bigger DHCP packets
than the defined default size unless the Maximum Messge Size option
- is explicitely set
+ is explicitly set
RFC3442 "Requirements to Avoid Sizing Constraints":
Because a full routing table can be quite large, the standard 576
if (r < 0)
return r;
+ if (client->client_id_len) {
+ r = dhcp_lease_set_client_id(lease,
+ (uint8_t *) &client->client_id,
+ client->client_id_len);
+ if (r < 0)
+ return r;
+ }
+
r = dhcp_option_parse(offer, len, dhcp_lease_parse_options, lease);
if (r != DHCP_OFFER) {
log_dhcp_client(client, "received message was not an OFFER, ignoring");
if (r < 0)
return r;
+ if (client->client_id_len) {
+ r = dhcp_lease_set_client_id(lease,
+ (uint8_t *) &client->client_id,
+ client->client_id_len);
+ if (r < 0)
+ return r;
+ }
+
r = dhcp_option_parse(ack, len, dhcp_lease_parse_options, lease);
if (r == DHCP_NAK) {
log_dhcp_client(client, "NAK");
client->last_addr = client->lease->address;
r = client_set_lease_timeouts(client);
- if (r < 0)
+ if (r < 0) {
+ log_dhcp_client(client, "could not set lease timeouts");
goto error;
+ }
r = dhcp_network_bind_udp_socket(client->lease->address,
DHCP_PORT_CLIENT);
_cleanup_free_ DHCPMessage *message = NULL;
int buflen = 0, len, r;
const struct ether_addr zero_mac = { { 0, 0, 0, 0, 0, 0 } };
- const struct ether_addr *expected_chaddr = NULL;
+ bool expect_chaddr;
uint8_t expected_hlen = 0;
assert(s);
if (client->arp_type == ARPHRD_ETHER) {
expected_hlen = ETH_ALEN;
- expected_chaddr = (const struct ether_addr *) &client->mac_addr;
+ expect_chaddr = true;
} else {
/* Non-ethernet links expect zero chaddr */
expected_hlen = 0;
- expected_chaddr = &zero_mac;
+ expect_chaddr = false;
}
if (message->hlen != expected_hlen) {
return 0;
}
- if (memcmp(&message->chaddr[0], expected_chaddr, ETH_ALEN)) {
+ if (memcmp(&message->chaddr[0], expect_chaddr ?
+ (void *)&client->mac_addr :
+ (void *)&zero_mac,
+ ETH_ALEN)) {
log_dhcp_client(client, "received chaddr does not match "
"expected: ignoring");
return 0;
r = client_start(client);
if (r >= 0)
- log_dhcp_client(client, "STARTED on ifindex %u", client->index);
+ log_dhcp_client(client, "STARTED on ifindex %i", client->index);
return r;
}
}
sd_dhcp_client *sd_dhcp_client_unref(sd_dhcp_client *client) {
- if (client && REFCNT_DEC(client->n_ref) <= 0) {
+ if (client && REFCNT_DEC(client->n_ref) == 0) {
log_dhcp_client(client, "FREE");
client_initialize(client);
~ianmdlvl / elogind.git / blobdiff