#include <stdio.h>
#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 "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 (sizeof(uint32_t) + MAX_DUID_LEN) /* Arbitrary limit */
+#define MAX_MAC_ADDR_LEN INFINIBAND_ALEN
+
struct sd_dhcp_client {
RefCount n_ref;
size_t req_opts_allocated;
size_t req_opts_size;
be32_t last_addr;
+ uint8_t mac_addr[MAX_MAC_ADDR_LEN];
+ size_t mac_addr_len;
+ uint16_t arp_type;
struct {
uint8_t type;
- struct ether_addr mac_addr;
+ 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;
uint32_t mtu;
uint32_t xid;
usec_t start_time;
- uint16_t secs;
unsigned int attempt;
usec_t request_sent;
sd_event_source *timeout_t1;
return 0;
}
-int sd_dhcp_client_set_mac(sd_dhcp_client *client,
- const struct ether_addr *addr) {
+int sd_dhcp_client_set_mac(sd_dhcp_client *client, const uint8_t *addr,
+ size_t addr_len, uint16_t arp_type) {
DHCP_CLIENT_DONT_DESTROY(client);
bool need_restart = false;
assert_return(client, -EINVAL);
assert_return(addr, -EINVAL);
+ assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL);
+ assert_return(arp_type > 0, -EINVAL);
+
+ if (arp_type == ARPHRD_ETHER)
+ assert_return(addr_len == ETH_ALEN, -EINVAL);
+ else if (arp_type == ARPHRD_INFINIBAND)
+ assert_return(addr_len == INFINIBAND_ALEN, -EINVAL);
+ else
+ return -EINVAL;
- if (memcmp(&client->client_id.mac_addr, addr, ETH_ALEN) == 0)
+ if (client->mac_addr_len == addr_len &&
+ memcmp(&client->mac_addr, addr, addr_len) == 0)
return 0;
if (!IN_SET(client->state, DHCP_STATE_INIT, DHCP_STATE_STOPPED)) {
client_stop(client, DHCP_EVENT_STOP);
}
- memcpy(&client->client_id.mac_addr, addr, ETH_ALEN);
- client->client_id.type = 0x01;
+ memcpy(&client->mac_addr, addr, addr_len);
+ client->mac_addr_len = addr_len;
+ client->arp_type = arp_type;
+
+ if (need_restart && client->state != DHCP_STATE_STOPPED)
+ sd_dhcp_client_start(client);
+
+ return 0;
+}
+
+int sd_dhcp_client_get_client_id(sd_dhcp_client *client, uint8_t *type,
+ const uint8_t **data, size_t *data_len) {
+
+ assert_return(client, -EINVAL);
+ assert_return(type, -EINVAL);
+ assert_return(data, -EINVAL);
+ assert_return(data_len, -EINVAL);
+
+ *type = 0;
+ *data = NULL;
+ *data_len = 0;
+ if (client->client_id_len) {
+ *type = client->client_id.type;
+ *data = client->client_id.raw.data;
+ *data_len = client->client_id_len - sizeof(client->client_id.type);
+ }
+
+ return 0;
+}
+
+int sd_dhcp_client_set_client_id(sd_dhcp_client *client, uint8_t type,
+ const uint8_t *data, size_t data_len) {
+ DHCP_CLIENT_DONT_DESTROY(client);
+ bool need_restart = false;
+
+ assert_return(client, -EINVAL);
+ assert_return(data, -EINVAL);
+ assert_return(data_len > 0 && data_len <= MAX_CLIENT_ID_LEN, -EINVAL);
+
+ switch (type) {
+ case ARPHRD_ETHER:
+ if (data_len != ETH_ALEN)
+ return -EINVAL;
+ break;
+ case ARPHRD_INFINIBAND:
+ if (data_len != INFINIBAND_ALEN)
+ return -EINVAL;
+ break;
+ default:
+ break;
+ }
+
+ 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;
+
+ if (!IN_SET(client->state, DHCP_STATE_INIT, DHCP_STATE_STOPPED)) {
+ log_dhcp_client(client, "Changing client ID on running DHCP "
+ "client, restarting");
+ need_restart = true;
+ client_stop(client, DHCP_EVENT_STOP);
+ }
+
+ client->client_id.type = type;
+ memcpy(&client->client_id.raw.data, data, data_len);
+ client->client_id_len = data_len + sizeof (client->client_id.type);
if (need_restart && client->state != DHCP_STATE_STOPPED)
sd_dhcp_client_start(client);
_cleanup_free_ DHCPPacket *packet;
size_t optlen, optoffset, size;
be16_t max_size;
+ usec_t time_now;
+ uint16_t secs;
int r;
assert(client);
- assert(client->secs);
+ assert(client->start_time);
assert(ret);
assert(_optlen);
assert(_optoffset);
return -ENOMEM;
r = dhcp_message_init(&packet->dhcp, BOOTREQUEST, client->xid, type,
- optlen, &optoffset);
+ client->arp_type, optlen, &optoffset);
if (r < 0)
return r;
/* Although 'secs' field is a SHOULD in RFC 2131, certain DHCP servers
refuse to issue an DHCP lease if 'secs' is set to zero */
- packet->dhcp.secs = htobe16(client->secs);
+ r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now);
+ if (r < 0)
+ return r;
+ assert(time_now >= client->start_time);
+
+ /* seconds between sending first and last DISCOVER
+ * must always be strictly positive to deal with broken servers */
+ secs = ((time_now - client->start_time) / USEC_PER_SEC) ? : 1;
+ packet->dhcp.secs = htobe16(secs);
/* RFC2132 section 4.1
A client that cannot receive unicast IP datagrams until its protocol
Note: some interfaces needs this to be enabled, but some networks
needs this to be disabled as broadcasts are filteretd, so this
needs to be configurable */
- if (client->request_broadcast)
+ if (client->request_broadcast || client->arp_type != ARPHRD_ETHER)
packet->dhcp.flags = htobe16(0x8000);
/* RFC2132 section 4.1.1:
The client MUST include its hardware address in the ’chaddr’ field, if
- necessary for delivery of DHCP reply messages.
+ necessary for delivery of DHCP reply messages. Non-Ethernet
+ interfaces will leave 'chaddr' empty and use the client identifier
+ instead (eg, RFC 4390 section 2.1).
*/
- memcpy(&packet->dhcp.chaddr, &client->client_id.mac_addr, ETH_ALEN);
+ 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;
+
+ 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
Identifier option is not set */
- r = dhcp_option_append(&packet->dhcp, optlen, &optoffset, 0,
- DHCP_OPTION_CLIENT_IDENTIFIER,
- sizeof(client->client_id), &client->client_id);
- if (r < 0)
- return r;
-
+ if (client->client_id_len) {
+ r = dhcp_option_append(&packet->dhcp, optlen, &optoffset, 0,
+ DHCP_OPTION_CLIENT_IDENTIFIER,
+ client->client_id_len,
+ &client->client_id);
+ if (r < 0)
+ return r;
+ }
/* RFC2131 section 3.5:
in its initial DHCPDISCOVER or DHCPREQUEST message, a
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
static int client_send_discover(sd_dhcp_client *client) {
_cleanup_free_ DHCPPacket *discover = NULL;
size_t optoffset, optlen;
- usec_t time_now;
int r;
assert(client);
assert(client->state == DHCP_STATE_INIT ||
client->state == DHCP_STATE_SELECTING);
- /* See RFC2131 section 4.4.1 */
-
- r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now);
- if (r < 0)
- return r;
- assert(time_now >= client->start_time);
-
- /* seconds between sending first and last DISCOVER
- * must always be strictly positive to deal with broken servers */
- client->secs = ((time_now - client->start_time) / USEC_PER_SEC) ? : 1;
-
r = client_message_init(client, &discover, DHCP_DISCOVER,
&optlen, &optoffset);
if (r < 0)
if (r < 0)
goto error;
+ r = sd_event_source_set_description(client->timeout_resend, "dhcp4-resend-timer");
+ if (r < 0)
+ goto error;
+
switch (client->state) {
case DHCP_STATE_INIT:
r = client_send_discover(client);
if (r < 0)
goto error;
+ r = sd_event_source_set_description(client->receive_message, "dhcp4-receive-message");
+ if (r < 0)
+ goto error;
+
error:
if (r < 0)
client_stop(client, r);
r = sd_event_source_set_priority(client->timeout_resend,
client->event_priority);
+ r = sd_event_source_set_description(client->timeout_resend, "dhcp4-resend-timer");
+ if (r < 0)
+ goto error;
+
error:
if (r < 0)
client_stop(client, r);
client->xid = random_u32();
- r = dhcp_network_bind_raw_socket(client->index, &client->link, client->xid, client->client_id.mac_addr);
+ r = dhcp_network_bind_raw_socket(client->index, &client->link,
+ client->xid, client->mac_addr,
+ client->mac_addr_len, client->arp_type);
if (r < 0) {
client_stop(client, r);
return r;
}
client->fd = r;
- if (client->state == DHCP_STATE_INIT) {
+ if (client->state == DHCP_STATE_INIT || client->state == DHCP_STATE_INIT_REBOOT)
client->start_time = now(clock_boottime_or_monotonic());
- client->secs = 0;
- }
return client_initialize_events(client, client_receive_message_raw);
}
client->state = DHCP_STATE_REBINDING;
client->attempt = 1;
- r = dhcp_network_bind_raw_socket(client->index, &client->link, client->xid, client->client_id.mac_addr);
+ r = dhcp_network_bind_raw_socket(client->index, &client->link,
+ client->xid, client->mac_addr,
+ client->mac_addr_len, client->arp_type);
if (r < 0) {
client_stop(client, r);
return 0;
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, "receieved message was not an OFFER, ignoring");
+ log_dhcp_client(client, "received message was not an OFFER, ignoring");
return -ENOMSG;
}
if (lease->address == INADDR_ANY ||
lease->server_address == INADDR_ANY ||
lease->lifetime == 0) {
- log_dhcp_client(client, "receieved lease lacks address, server "
+ log_dhcp_client(client, "received lease lacks address, server "
"address or lease lifetime, ignoring");
return -ENOMSG;
}
if (lease->subnet_mask == INADDR_ANY) {
r = dhcp_lease_set_default_subnet_mask(lease);
if (r < 0) {
- log_dhcp_client(client, "receieved lease lacks subnet "
+ log_dhcp_client(client, "received lease lacks subnet "
"mask, and a fallback one can not be "
"generated, ignoring");
return -ENOMSG;
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");
}
if (r != DHCP_ACK) {
- log_dhcp_client(client, "receieved message was not an ACK, ignoring");
+ log_dhcp_client(client, "received message was not an ACK, ignoring");
return -ENOMSG;
}
if (lease->address == INADDR_ANY ||
lease->server_address == INADDR_ANY ||
lease->lifetime == 0) {
- log_dhcp_client(client, "receieved lease lacks address, server "
+ log_dhcp_client(client, "received lease lacks address, server "
"address or lease lifetime, ignoring");
return -ENOMSG;
}
if (lease->subnet_mask == INADDR_ANY) {
r = dhcp_lease_set_default_subnet_mask(lease);
if (r < 0) {
- log_dhcp_client(client, "receieved lease lacks subnet "
+ log_dhcp_client(client, "received lease lacks subnet "
"mask, and a fallback one can not be "
"generated, ignoring");
return -ENOMSG;
if (r < 0)
return r;
+ r = sd_event_source_set_description(client->timeout_expire, "dhcp4-lifetime");
+ if (r < 0)
+ return r;
+
log_dhcp_client(client, "lease expires in %s",
format_timespan(time_string, FORMAT_TIMESPAN_MAX,
lifetime_timeout - time_now, 0));
if (r < 0)
return r;
+ r = sd_event_source_set_description(client->timeout_t2, "dhcp4-t2-timeout");
+ if (r < 0)
+ return r;
+
log_dhcp_client(client, "T2 expires in %s",
format_timespan(time_string, FORMAT_TIMESPAN_MAX,
t2_timeout - time_now, 0));
if (r < 0)
return r;
+ r = sd_event_source_set_description(client->timeout_t1, "dhcp4-t1-timer");
+ if (r < 0)
+ return r;
+
log_dhcp_client(client, "T1 expires in %s",
format_timespan(time_string, FORMAT_TIMESPAN_MAX,
t1_timeout - time_now, 0));
client->event_priority);
if (r < 0)
goto error;
+
+ r = sd_event_source_set_description(client->timeout_resend, "dhcp4-resend-timer");
+ if (r < 0)
+ goto error;
} else if (r == -ENOMSG)
/* invalid message, let's ignore it */
return 0;
if (r >= 0) {
client->timeout_resend =
sd_event_source_unref(client->timeout_resend);
+ client->receive_message =
+ sd_event_source_unref(client->receive_message);
+ client->fd = asynchronous_close(client->fd);
if (IN_SET(client->state, DHCP_STATE_REQUESTING,
DHCP_STATE_REBOOTING))
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);
sd_dhcp_client *client = userdata;
_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;
+ uint8_t expected_hlen = 0;
assert(s);
assert(client);
return 0;
}
- if (message->htype != ARPHRD_ETHER || message->hlen != ETHER_ADDR_LEN) {
- log_dhcp_client(client, "not an ethernet packet");
+ if (message->htype != client->arp_type) {
+ log_dhcp_client(client, "packet type does not match client type");
+ return 0;
+ }
+
+ if (client->arp_type == ARPHRD_ETHER) {
+ expected_hlen = ETH_ALEN;
+ expected_chaddr = (const struct ether_addr *) &client->mac_addr;
+ } else {
+ /* Non-ethernet links expect zero chaddr */
+ expected_hlen = 0;
+ expected_chaddr = &zero_mac;
+ }
+
+ if (message->hlen != expected_hlen) {
+ log_dhcp_client(client, "unexpected packet hlen %d", message->hlen);
return 0;
}
- if (memcmp(&message->chaddr[0], &client->client_id.mac_addr,
- ETH_ALEN)) {
+ if (memcmp(&message->chaddr[0], expected_chaddr, ETH_ALEN)) {
log_dhcp_client(client, "received chaddr does not match "
"expected: ignoring");
return 0;
}
int sd_dhcp_client_start(sd_dhcp_client *client) {
- char buffer[ETHER_ADDR_TO_STRING_MAX];
int r;
assert_return(client, -EINVAL);
r = client_start(client);
if (r >= 0)
- log_dhcp_client(client, "STARTED on ifindex %u with address %s",
- client->index,
- ether_addr_to_string(&client->client_id.mac_addr, buffer));
+ 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