refuse to issue an DHCP lease if 'secs' is set to zero */
message->secs = htobe16(secs);
- if (client->state == DHCP_STATE_RENEWING)
+ if (client->state == DHCP_STATE_RENEWING ||
+ client->state == DHCP_STATE_REBINDING)
message->ciaddr = client->lease->address;
memcpy(&message->chaddr, &client->mac_addr, ETH_ALEN);
break;
+ case DHCP_STATE_REBINDING:
+
+ time_left = (client->lease->lifetime - client->lease->t2)/2;
+ if (time_left < 60)
+ time_left = 60;
+
+ next_timeout = usec + time_left * USEC_PER_SEC;
+
+ break;
+
case DHCP_STATE_INIT:
case DHCP_STATE_INIT_REBOOT:
case DHCP_STATE_REBOOTING:
case DHCP_STATE_SELECTING:
case DHCP_STATE_REQUESTING:
case DHCP_STATE_BOUND:
- case DHCP_STATE_REBINDING:
if (client->attempt < 64)
client->attempt *= 2;
case DHCP_STATE_REQUESTING:
case DHCP_STATE_RENEWING:
+ case DHCP_STATE_REBINDING:
err = client_send_request(client, secs);
if (err < 0 && client->attempt >= 64)
goto error;
case DHCP_STATE_INIT_REBOOT:
case DHCP_STATE_REBOOTING:
case DHCP_STATE_BOUND:
- case DHCP_STATE_REBINDING:
break;
}
return 0;
}
+static int client_initialize_events(sd_dhcp_client *client, usec_t usec)
+{
+ int r;
+
+ r = sd_event_add_io(client->event, client->fd, EPOLLIN,
+ client_receive_message, client,
+ &client->receive_message);
+ if (r < 0)
+ goto error;
+
+ r = sd_event_add_monotonic(client->event, usec, 0,
+ client_timeout_resend, client,
+ &client->timeout_resend);
+
+error:
+ if (r < 0)
+ client_stop(client, r);
+
+ return 0;
+
+}
+
static int client_timeout_expire(sd_event_source *s, uint64_t usec,
void *userdata)
{
static int client_timeout_t2(sd_event_source *s, uint64_t usec, void *userdata)
{
- return 0;
+ sd_dhcp_client *client = userdata;
+ int r;
+
+ if (client->fd >= 0) {
+ client->receive_message =
+ sd_event_source_unref(client->receive_message);
+ close(client->fd);
+ client->fd = -1;
+ }
+
+ client->state = DHCP_STATE_REBINDING;
+ client->attempt = 1;
+
+ r = dhcp_network_bind_raw_socket(client->index, &client->link);
+ if (r < 0) {
+ client_stop(client, r);
+ return 0;
+ }
+
+ client->fd = r;
+
+ return client_initialize_events(client, usec);
}
static int client_timeout_t1(sd_event_source *s, uint64_t usec, void *userdata)
r = dhcp_network_bind_udp_socket(client->index,
client->lease->address);
- if (r < 0)
- goto error;
+ if (r < 0) {
+ client_stop(client, r);
+ return 0;
+ }
client->fd = r;
- r = sd_event_add_io(client->event, client->fd, EPOLLIN,
- client_receive_message, client,
- &client->receive_message);
- if (r < 0)
- goto error;
-
- r = sd_event_add_monotonic(client->event, usec, 0,
- client_timeout_resend, client,
- &client->timeout_resend);
- if (r < 0)
- goto error;
-
- return 0;
-
-error:
- client_stop(client, r);
- return 0;
+ return client_initialize_events(client, usec);
}
static int client_parse_offer(uint8_t code, uint8_t len, const uint8_t *option,
case DHCP_STATE_REQUESTING:
case DHCP_STATE_RENEWING:
+ case DHCP_STATE_REBINDING:
r = client_receive_ack(client, buf, len);
case DHCP_STATE_INIT_REBOOT:
case DHCP_STATE_REBOOTING:
case DHCP_STATE_BOUND:
- case DHCP_STATE_REBINDING:
break;
}
int sd_dhcp_client_start(sd_dhcp_client *client)
{
- int err;
+ int r;
assert_return(client, -EINVAL);
- assert_return(client->index >= 0, -EINVAL);
+ assert_return(client->index > 0, -EINVAL);
assert_return(client->state == DHCP_STATE_INIT ||
client->state == DHCP_STATE_INIT_REBOOT, -EBUSY);
client->xid = random_u();
- client->fd = dhcp_network_bind_raw_socket(client->index,
- &client->link);
+ r = dhcp_network_bind_raw_socket(client->index, &client->link);
- if (client->fd < 0) {
- err = client->fd;
- goto error;
+ if (r < 0) {
+ client_stop(client, r);
+ return r;
}
- err = sd_event_add_io(client->event, client->fd, EPOLLIN,
- client_receive_message, client,
- &client->receive_message);
- if (err < 0)
- goto error;
-
+ client->fd = r;
client->start_time = now(CLOCK_MONOTONIC);
- err = sd_event_add_monotonic(client->event, client->start_time, 0,
- client_timeout_resend, client,
- &client->timeout_resend);
- if (err < 0)
- goto error;
-
- return 0;
-error:
- client_stop(client, err);
-
- return err;
+ return client_initialize_events(client, client->start_time);
}
int sd_dhcp_client_stop(sd_dhcp_client *client)