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libsystemd-dhcp: Handle T2 Rebinding timeout

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Reuse existing functionality when adding T2 Rebinding support.
This commit is contained in:
Patrik Flykt 2013-12-20 17:16:20 +02:00 committed by Tom Gundersen
parent 6a1cd41ef0
commit 3dd7140035
1 changed files with 36 additions and 5 deletions
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41
src/libsystemd-dhcp/dhcp-client.c
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@ -328,7 +328,8 @@ static int client_packet_init(sd_dhcp_client *client, uint8_t type,
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);
@ -532,13 +533,22 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
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;
@ -581,6 +591,7 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
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;
@ -592,7 +603,6 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
case DHCP_STATE_INIT_REBOOT:
case DHCP_STATE_REBOOTING:
case DHCP_STATE_BOUND:
case DHCP_STATE_REBINDING:
break;
}
@ -641,7 +651,28 @@ static int client_timeout_expire(sd_event_source *s, uint64_t usec,
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)
@ -972,6 +1003,7 @@ static int client_receive_message(sd_event_source *s, int fd,
case DHCP_STATE_REQUESTING:
case DHCP_STATE_RENEWING:
case DHCP_STATE_REBINDING:
r = client_receive_ack(client, buf, len);
@ -1013,7 +1045,6 @@ static int client_receive_message(sd_event_source *s, int fd,
case DHCP_STATE_INIT_REBOOT:
case DHCP_STATE_REBOOTING:
case DHCP_STATE_BOUND:
case DHCP_STATE_REBINDING:
break;
}