#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
+#include <linux/if_infiniband.h>
#include "udev.h"
#include "udev-util.h"
#include "dhcp6-protocol.h"
#include "dhcp6-internal.h"
#include "dhcp6-lease-internal.h"
+#include "dhcp-identifier.h"
#define SYSTEMD_PEN 43793
#define HASH_KEY SD_ID128_MAKE(80,11,8c,c2,fe,4a,03,ee,3e,d6,0c,6f,36,39,14,09)
+#define MAX_MAC_ADDR_LEN INFINIBAND_ALEN
+
struct sd_dhcp6_client {
RefCount n_ref;
sd_event *event;
int event_priority;
int index;
- struct ether_addr mac_addr;
+ uint8_t mac_addr[MAX_MAC_ADDR_LEN];
+ size_t mac_addr_len;
+ uint16_t arp_type;
DHCP6IA ia_na;
be32_t transaction_id;
+ usec_t transaction_start;
struct sd_dhcp6_lease *lease;
int fd;
+ bool information_request;
be16_t *req_opts;
size_t req_opts_allocated;
size_t req_opts_len;
sd_event_source *timeout_resend_expire;
sd_dhcp6_client_cb_t cb;
void *userdata;
-
- struct duid_en {
- uint16_t type; /* DHCP6_DUID_EN */
- uint32_t pen;
- uint8_t id[8];
- } _packed_ duid;
+ struct duid duid;
+ size_t duid_len;
};
static const uint16_t default_req_opts[] = {
return 0;
}
-int sd_dhcp6_client_set_mac(sd_dhcp6_client *client,
- const struct ether_addr *mac_addr)
+int sd_dhcp6_client_set_mac(sd_dhcp6_client *client, const uint8_t *addr,
+ size_t addr_len, uint16_t arp_type)
{
assert_return(client, -EINVAL);
-
- if (mac_addr)
- memcpy(&client->mac_addr, mac_addr, sizeof(client->mac_addr));
+ 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
- memset(&client->mac_addr, 0x00, sizeof(client->mac_addr));
+ return -EINVAL;
+
+ if (client->mac_addr_len == addr_len &&
+ memcmp(&client->mac_addr, addr, addr_len) == 0)
+ return 0;
+
+ memcpy(&client->mac_addr, addr, addr_len);
+ client->mac_addr_len = addr_len;
+ client->arp_type = arp_type;
+
+ return 0;
+}
+
+int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint16_t type, uint8_t *duid,
+ size_t duid_len)
+{
+ assert_return(client, -EINVAL);
+ 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.type = htobe16(type);
+ memcpy(&client->duid.raw.data, duid, duid_len);
+ client->duid_len = duid_len + sizeof(client->duid.type);
+
+ return 0;
+}
+
+int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client,
+ bool enabled) {
+ assert_return(client, -EINVAL);
+
+ client->information_request = enabled;
+
+ return 0;
+}
+
+int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client,
+ bool *enabled) {
+ assert_return(client, -EINVAL);
+ assert_return(enabled, -EINVAL);
+
+ *enabled = client->information_request;
return 0;
}
client->fd = safe_close(client->fd);
client->transaction_id = 0;
+ client->transaction_start = 0;
client->ia_na.timeout_t1 =
sd_event_source_unref(client->ia_na.timeout_t1);
client_reset(client);
}
-static int client_send_message(sd_dhcp6_client *client) {
+static int client_send_message(sd_dhcp6_client *client, usec_t time_now) {
_cleanup_free_ DHCP6Message *message = NULL;
struct in6_addr all_servers =
IN6ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS_INIT;
size_t len, optlen = 512;
uint8_t *opt;
int r;
+ usec_t elapsed_usec;
+ be16_t elapsed_time;
len = sizeof(DHCP6Message) + optlen;
message->transaction_id = client->transaction_id;
switch(client->state) {
+ case DHCP6_STATE_INFORMATION_REQUEST:
+ message->type = DHCP6_INFORMATION_REQUEST;
+
+ break;
+
case DHCP6_STATE_SOLICITATION:
message->type = DHCP6_SOLICIT;
+ r = dhcp6_option_append(&opt, &optlen,
+ DHCP6_OPTION_RAPID_COMMIT, 0, NULL);
+ if (r < 0)
+ return r;
+
r = dhcp6_option_append_ia(&opt, &optlen, &client->ia_na);
if (r < 0)
return r;
break;
case DHCP6_STATE_REQUEST:
- message->type = DHCP6_REQUEST;
+ case DHCP6_STATE_RENEW:
+
+ if (client->state == DHCP6_STATE_REQUEST)
+ message->type = DHCP6_REQUEST;
+ else
+ message->type = DHCP6_RENEW;
r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_SERVERID,
client->lease->serverid_len,
break;
+ case DHCP6_STATE_REBIND:
+ message->type = DHCP6_REBIND;
+
+ r = dhcp6_option_append_ia(&opt, &optlen, &client->lease->ia);
+ if (r < 0)
+ return r;
+
+ break;
+
case DHCP6_STATE_STOPPED:
- case DHCP6_STATE_RS:
case DHCP6_STATE_BOUND:
return -EINVAL;
}
return r;
r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_CLIENTID,
- sizeof(client->duid), &client->duid);
+ client->duid_len, &client->duid);
+ if (r < 0)
+ return r;
+
+ elapsed_usec = time_now - client->transaction_start;
+ if (elapsed_usec < 0xffff * USEC_PER_MSEC * 10)
+ elapsed_time = htobe16(elapsed_usec / USEC_PER_MSEC / 10);
+ else
+ elapsed_time = 0xffff;
+
+ r = dhcp6_option_append(&opt, &optlen, DHCP6_OPTION_ELAPSED_TIME,
+ sizeof(elapsed_time), &elapsed_time);
if (r < 0)
return r;
log_dhcp6_client(client, "Timeout T2");
+ client_start(client, DHCP6_STATE_REBIND);
+
return 0;
}
log_dhcp6_client(client, "Timeout T1");
+ client_start(client, DHCP6_STATE_RENEW);
+
return 0;
}
static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec,
void *userdata) {
sd_dhcp6_client *client = userdata;
+ DHCP6_CLIENT_DONT_DESTROY(client);
+ enum DHCP6State state;
assert(s);
assert(client);
assert(client->event);
+ state = client->state;
+
client_stop(client, DHCP6_EVENT_RESEND_EXPIRE);
+ /* RFC 3315, section 18.1.4., says that "...the client may choose to
+ use a Solicit message to locate a new DHCP server..." */
+ if (state == DHCP6_STATE_REBIND)
+ client_start(client, DHCP6_STATE_SOLICITATION);
+
return 0;
}
void *userdata) {
int r = 0;
sd_dhcp6_client *client = userdata;
- usec_t time_now, init_retransmit_time, max_retransmit_time;
- usec_t max_retransmit_duration;
+ usec_t time_now, init_retransmit_time = 0, max_retransmit_time = 0;
+ usec_t max_retransmit_duration = 0;
uint8_t max_retransmit_count = 0;
char time_string[FORMAT_TIMESPAN_MAX];
+ uint32_t expire = 0;
assert(s);
assert(client);
client->timeout_resend = sd_event_source_unref(client->timeout_resend);
switch (client->state) {
+ case DHCP6_STATE_INFORMATION_REQUEST:
+ init_retransmit_time = DHCP6_INF_TIMEOUT;
+ max_retransmit_time = DHCP6_INF_MAX_RT;
+
+ break;
+
case DHCP6_STATE_SOLICITATION:
if (client->retransmit_count && client->lease) {
init_retransmit_time = DHCP6_SOL_TIMEOUT;
max_retransmit_time = DHCP6_SOL_MAX_RT;
- max_retransmit_count = 0;
- max_retransmit_duration = 0;
break;
init_retransmit_time = DHCP6_REQ_TIMEOUT;
max_retransmit_time = DHCP6_REQ_MAX_RT;
max_retransmit_count = DHCP6_REQ_MAX_RC;
- max_retransmit_duration = 0;
+
+ break;
+
+ case DHCP6_STATE_RENEW:
+ init_retransmit_time = DHCP6_REN_TIMEOUT;
+ max_retransmit_time = DHCP6_REN_MAX_RT;
+
+ /* RFC 3315, section 18.1.3. says max retransmit duration will
+ be the remaining time until T2. Instead of setting MRD,
+ wait for T2 to trigger with the same end result */
+
+ break;
+
+ case DHCP6_STATE_REBIND:
+ init_retransmit_time = DHCP6_REB_TIMEOUT;
+ max_retransmit_time = DHCP6_REB_MAX_RT;
+
+ if (!client->timeout_resend_expire) {
+ r = dhcp6_lease_ia_rebind_expire(&client->lease->ia,
+ &expire);
+ if (r < 0) {
+ client_stop(client, r);
+ return 0;
+ }
+ max_retransmit_duration = expire * USEC_PER_SEC;
+ }
break;
case DHCP6_STATE_STOPPED:
- case DHCP6_STATE_RS:
case DHCP6_STATE_BOUND:
return 0;
}
return 0;
}
- r = client_send_message(client);
- if (r >= 0)
- client->retransmit_count++;
-
-
- r = sd_event_now(client->event, CLOCK_MONOTONIC, &time_now);
+ r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now);
if (r < 0)
goto error;
+ r = client_send_message(client, time_now);
+ if (r >= 0)
+ client->retransmit_count++;
+
if (!client->retransmit_time) {
client->retransmit_time =
client_timeout_compute_random(init_retransmit_time);
client->retransmit_time, 0));
r = sd_event_add_time(client->event, &client->timeout_resend,
- CLOCK_MONOTONIC,
+ clock_boottime_or_monotonic(),
time_now + client->retransmit_time,
10 * USEC_PER_MSEC, client_timeout_resend,
client);
if (r < 0)
goto error;
+ r = sd_event_source_set_description(client->timeout_resend, "dhcp6-resend-timer");
+ if (r < 0)
+ goto error;
+
if (max_retransmit_duration && !client->timeout_resend_expire) {
log_dhcp6_client(client, "Max retransmission duration %"PRIu64" secs",
r = sd_event_add_time(client->event,
&client->timeout_resend_expire,
- CLOCK_MONOTONIC,
+ clock_boottime_or_monotonic(),
time_now + max_retransmit_duration,
USEC_PER_SEC,
client_timeout_resend_expire, client);
client->event_priority);
if (r < 0)
goto error;
+
+ r = sd_event_source_set_description(client->timeout_resend_expire, "dhcp6-resend-expire-timer");
+ if (r < 0)
+ goto error;
}
error:
}
static int client_ensure_iaid(sd_dhcp6_client *client) {
+ /* name is a pointer to memory in the udev_device struct, so must
+ have the same scope */
+ _cleanup_udev_device_unref_ struct udev_device *device = NULL;
const char *name = NULL;
uint64_t id;
if (detect_container(NULL) <= 0) {
/* not in a container, udev will be around */
_cleanup_udev_unref_ struct udev *udev;
- _cleanup_udev_device_unref_ struct udev_device *device = NULL;
char ifindex_str[2 + DECIMAL_STR_MAX(int)];
udev = udev_new();
siphash24((uint8_t*)&id, name, strlen(name), HASH_KEY.bytes);
else
/* fall back to mac address if no predictable name available */
- siphash24((uint8_t*)&id, &client->mac_addr, ETH_ALEN,
- HASH_KEY.bytes);
+ siphash24((uint8_t*)&id, &client->mac_addr,
+ client->mac_addr_len, HASH_KEY.bytes);
/* fold into 32 bits */
client->ia_na.id = (id & 0xffffffff) ^ (id >> 32);
DHCP6Message *message, size_t len,
sd_dhcp6_lease *lease) {
int r;
- uint8_t *optval, *option = (uint8_t *)(message + 1), *id = NULL;
+ uint8_t *optval, *option, *id = NULL;
uint16_t optcode, status;
size_t optlen, id_len;
bool clientid = false;
be32_t iaid_lease;
+ option = (uint8_t *)message + sizeof(DHCP6Message);
+ len -= sizeof(DHCP6Message);
+
while ((r = dhcp6_option_parse(&option, &len, &optcode, &optlen,
&optval)) >= 0) {
switch (optcode) {
return -EINVAL;
}
- if (optlen != sizeof(client->duid) ||
+ if (optlen != client->duid_len ||
memcmp(&client->duid, optval, optlen) != 0) {
log_dhcp6_client(client, "%s DUID does not match",
dhcp6_message_type_to_string(message->type));
break;
case DHCP6_OPTION_IA_NA:
+ if (client->state == DHCP6_STATE_INFORMATION_REQUEST) {
+ log_dhcp6_client(client, "Information request ignoring IA NA option");
+
+ break;
+ }
+
r = dhcp6_option_parse_ia(&optval, &optlen, optcode,
&lease->ia);
if (r < 0 && r != -ENOMSG)
}
break;
+
+ case DHCP6_OPTION_RAPID_COMMIT:
+ r = dhcp6_lease_set_rapid_commit(lease);
+ if (r < 0)
+ return r;
+
+ break;
}
}
- if ((r < 0 && r != -ENOMSG) || !clientid) {
+ if (r == -ENOMSG)
+ r = 0;
+
+ if (r < 0 || !clientid) {
log_dhcp6_client(client, "%s has incomplete options",
dhcp6_message_type_to_string(message->type));
return -EINVAL;
}
- r = dhcp6_lease_get_serverid(lease, &id, &id_len);
- if (r < 0)
- log_dhcp6_client(client, "%s has no server id",
- dhcp6_message_type_to_string(message->type));
+ if (client->state != DHCP6_STATE_INFORMATION_REQUEST) {
+ r = dhcp6_lease_get_serverid(lease, &id, &id_len);
+ if (r < 0)
+ log_dhcp6_client(client, "%s has no server id",
+ dhcp6_message_type_to_string(message->type));
+ }
return r;
}
{
int r;
_cleanup_dhcp6_lease_free_ sd_dhcp6_lease *lease = NULL;
+ bool rapid_commit;
if (reply->type != DHCP6_REPLY)
- return -EINVAL;
+ return 0;
r = dhcp6_lease_new(&lease);
if (r < 0)
if (r < 0)
return r;
- dhcp6_lease_clear_timers(&client->lease->ia);
+ if (client->state == DHCP6_STATE_SOLICITATION) {
+ r = dhcp6_lease_get_rapid_commit(lease, &rapid_commit);
+ if (r < 0)
+ return r;
+
+ if (!rapid_commit)
+ return 0;
+ }
+
+ if (client->lease) {
+ dhcp6_lease_clear_timers(&client->lease->ia);
+ client->lease = sd_dhcp6_lease_unref(client->lease);
+ }
- client->lease = sd_dhcp6_lease_unref(client->lease);
- client->lease = lease;
- lease = NULL;
+ if (client->state != DHCP6_STATE_INFORMATION_REQUEST) {
+ client->lease = lease;
+ lease = NULL;
+ }
return DHCP6_STATE_BOUND;
}
uint8_t pref_advertise = 0, pref_lease = 0;
if (advertise->type != DHCP6_ADVERTISE)
- return -EINVAL;
+ return 0;
r = dhcp6_lease_new(&lease);
if (r < 0)
return r;
r = dhcp6_lease_get_preference(client->lease, &pref_lease);
- if (!client->lease || r < 0 || pref_advertise > pref_lease) {
+
+ if (r < 0 || pref_advertise > pref_lease) {
sd_dhcp6_lease_unref(client->lease);
client->lease = lease;
lease = NULL;
return 0;
switch (client->state) {
+ case DHCP6_STATE_INFORMATION_REQUEST:
+ r = client_receive_reply(client, message, len);
+ if (r < 0)
+ return 0;
+
+ client_notify(client, DHCP6_EVENT_INFORMATION_REQUEST);
+
+ client_start(client, DHCP6_STATE_STOPPED);
+
+ break;
+
case DHCP6_STATE_SOLICITATION:
r = client_receive_advertise(client, message, len);
- if (r == DHCP6_STATE_REQUEST)
+ if (r == DHCP6_STATE_REQUEST) {
client_start(client, r);
- break;
+ break;
+ }
+ /* fall through for Soliciation Rapid Commit option check */
case DHCP6_STATE_REQUEST:
+ case DHCP6_STATE_RENEW:
+ case DHCP6_STATE_REBIND:
+
r = client_receive_reply(client, message, len);
if (r < 0)
return 0;
break;
case DHCP6_STATE_STOPPED:
- case DHCP6_STATE_RS:
return 0;
}
client->retransmit_time = 0;
client->retransmit_count = 0;
- switch (state) {
- case DHCP6_STATE_STOPPED:
- case DHCP6_STATE_RS:
- case DHCP6_STATE_SOLICITATION:
-
- r = client_ensure_iaid(client);
- if (r < 0)
- return r;
-
- r = dhcp6_network_bind_udp_socket(client->index, NULL);
+ if (client->state == DHCP6_STATE_STOPPED) {
+ time_now = now(clock_boottime_or_monotonic());
+ } else {
+ r = sd_event_now(client->event, clock_boottime_or_monotonic(),
+ &time_now);
if (r < 0)
return r;
+ }
- client->fd = r;
-
- r = sd_event_add_io(client->event, &client->receive_message,
- client->fd, EPOLLIN, client_receive_message,
- client);
- if (r < 0)
- return r;
+ switch (state) {
+ case DHCP6_STATE_STOPPED:
+ if (client->state == DHCP6_STATE_INFORMATION_REQUEST) {
+ client->state = DHCP6_STATE_STOPPED;
- r = sd_event_source_set_priority(client->receive_message,
- client->event_priority);
- if (r < 0)
- return r;
+ return 0;
+ }
+ /* fall through */
+ case DHCP6_STATE_SOLICITATION:
client->state = DHCP6_STATE_SOLICITATION;
break;
+ case DHCP6_STATE_INFORMATION_REQUEST:
case DHCP6_STATE_REQUEST:
+ case DHCP6_STATE_RENEW:
+ case DHCP6_STATE_REBIND:
client->state = state;
case DHCP6_STATE_BOUND:
- r = sd_event_now(client->event, CLOCK_MONOTONIC, &time_now);
- if (r < 0)
- return r;
-
if (client->lease->ia.lifetime_t1 == 0xffffffff ||
client->lease->ia.lifetime_t2 == 0xffffffff) {
r = sd_event_add_time(client->event,
&client->lease->ia.timeout_t1,
- CLOCK_MONOTONIC, time_now + timeout,
+ clock_boottime_or_monotonic(), time_now + timeout,
10 * USEC_PER_SEC, client_timeout_t1,
client);
if (r < 0)
if (r < 0)
return r;
+ r = sd_event_source_set_description(client->lease->ia.timeout_t1, "dhcp6-t1-timeout");
+ if (r < 0)
+ return r;
+
timeout = client_timeout_compute_random(be32toh(client->lease->ia.lifetime_t2) * USEC_PER_SEC);
log_dhcp6_client(client, "T2 expires in %s",
r = sd_event_add_time(client->event,
&client->lease->ia.timeout_t2,
- CLOCK_MONOTONIC, time_now + timeout,
+ clock_boottime_or_monotonic(), time_now + timeout,
10 * USEC_PER_SEC, client_timeout_t2,
client);
if (r < 0)
if (r < 0)
return r;
+ r = sd_event_source_set_description(client->lease->ia.timeout_t2, "dhcp6-t2-timeout");
+ if (r < 0)
+ return r;
+
+ client->state = state;
+
return 0;
}
client->transaction_id = random_u32() & htobe32(0x00ffffff);
+ client->transaction_start = time_now;
r = sd_event_add_time(client->event, &client->timeout_resend,
- CLOCK_MONOTONIC, 0, 0, client_timeout_resend,
+ clock_boottime_or_monotonic(), 0, 0, client_timeout_resend,
client);
if (r < 0)
return r;
if (r < 0)
return r;
+ r = sd_event_source_set_description(client->timeout_resend, "dhcp6-resend-timeout");
+ if (r < 0)
+ return r;
+
return 0;
}
int sd_dhcp6_client_start(sd_dhcp6_client *client)
{
int r = 0;
+ enum DHCP6State state = DHCP6_STATE_SOLICITATION;
assert_return(client, -EINVAL);
assert_return(client->event, -EINVAL);
if (r < 0)
return r;
- return client_start(client, DHCP6_STATE_SOLICITATION);
+ r = client_ensure_iaid(client);
+ if (r < 0)
+ return r;
+
+ r = dhcp6_network_bind_udp_socket(client->index, NULL);
+ if (r < 0)
+ return r;
+
+ client->fd = r;
+
+ r = sd_event_add_io(client->event, &client->receive_message,
+ client->fd, EPOLLIN, client_receive_message,
+ client);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_priority(client->receive_message,
+ client->event_priority);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_source_set_description(client->receive_message,
+ "dhcp6-receive-message");
+ if (r < 0)
+ goto error;
+
+ if (client->information_request)
+ state = DHCP6_STATE_INFORMATION_REQUEST;
+
+ log_dhcp6_client(client, "Started in %s mode",
+ client->information_request? "Information request":
+ "Managed");
+
+ return client_start(client, state);
+
+error:
+ client_reset(client);
+ return r;
}
int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event,
}
sd_dhcp6_client *sd_dhcp6_client_unref(sd_dhcp6_client *client) {
- if (client && REFCNT_DEC(client->n_ref) <= 0) {
+ if (client && REFCNT_DEC(client->n_ref) == 0) {
client_reset(client);
sd_dhcp6_client_detach_event(client);
/* initialize DUID */
client->duid.type = htobe16(DHCP6_DUID_EN);
- client->duid.pen = htobe32(SYSTEMD_PEN);
+ client->duid.en.pen = htobe32(SYSTEMD_PEN);
+ client->duid_len = sizeof(client->duid.en);
r = sd_id128_get_machine(&machine_id);
if (r < 0)
/* a bit of snake-oil perhaps, but no need to expose the machine-id
directly */
- siphash24(client->duid.id, &machine_id, sizeof(machine_id),
- HASH_KEY.bytes);
+ siphash24(client->duid.en.id, &machine_id, sizeof(machine_id), HASH_KEY.bytes);
client->req_opts_len = ELEMENTSOF(default_req_opts);
~ianmdlvl / elogind.git / blobdiff