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-rw-r--r--src/libsystemd-network/dhcp6-protocol.h6
-rw-r--r--src/libsystemd-network/sd-dhcp6-client.c68
2 files changed, 73 insertions, 1 deletions
diff --git a/src/libsystemd-network/dhcp6-protocol.h b/src/libsystemd-network/dhcp6-protocol.h
index 37a8671a00..e9ae598b7a 100644
--- a/src/libsystemd-network/dhcp6-protocol.h
+++ b/src/libsystemd-network/dhcp6-protocol.h
@@ -57,6 +57,10 @@ enum {
#define DHCP6_REQ_TIMEOUT 1 * USEC_PER_SEC
#define DHCP6_REQ_MAX_RT 120 * USEC_PER_SEC
#define DHCP6_REQ_MAX_RC 10
+#define DHCP6_REN_TIMEOUT 10 * USEC_PER_SEC
+#define DHCP6_REN_MAX_RT 600 * USEC_PER_SEC
+#define DHCP6_REB_TIMEOUT 10 * USEC_PER_SEC
+#define DHCP6_REB_MAX_RT 600 * USEC_PER_SEC
enum {
DHCP6_DUID_LLT = 1,
@@ -71,6 +75,8 @@ enum DHCP6State {
DHCP6_STATE_SOLICITATION = 2,
DHCP6_STATE_REQUEST = 3,
DHCP6_STATE_BOUND = 4,
+ DHCP6_STATE_RENEW = 5,
+ DHCP6_STATE_REBIND = 6,
};
enum {
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 5d65603dc2..60d502fcbe 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -259,7 +259,12 @@ static int client_send_message(sd_dhcp6_client *client) {
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,
@@ -273,6 +278,15 @@ static int client_send_message(sd_dhcp6_client *client) {
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:
@@ -314,6 +328,8 @@ static int client_timeout_t2(sd_event_source *s, uint64_t usec,
log_dhcp6_client(client, "Timeout T2");
+ client_start(client, DHCP6_STATE_REBIND);
+
return 0;
}
@@ -330,19 +346,30 @@ static int client_timeout_t1(sd_event_source *s, uint64_t usec,
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;
}
@@ -359,6 +386,7 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
usec_t max_retransmit_duration;
uint8_t max_retransmit_count = 0;
char time_string[FORMAT_TIMESPAN_MAX];
+ uint32_t expire = 0;
assert(s);
assert(client);
@@ -389,6 +417,37 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
break;
+ case DHCP6_STATE_RENEW:
+ init_retransmit_time = DHCP6_REN_TIMEOUT;
+ max_retransmit_time = DHCP6_REN_MAX_RT;
+ max_retransmit_count = 0;
+
+ /* 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 */
+ max_retransmit_duration = 0;
+
+ break;
+
+ case DHCP6_STATE_REBIND:
+ init_retransmit_time = DHCP6_REB_TIMEOUT;
+ max_retransmit_time = DHCP6_REB_MAX_RT;
+ max_retransmit_count = 0;
+
+ max_retransmit_duration = 0;
+
+ 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:
@@ -740,6 +799,9 @@ static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
break;
case DHCP6_STATE_REQUEST:
+ case DHCP6_STATE_RENEW:
+ case DHCP6_STATE_REBIND:
+
r = client_receive_reply(client, message, len);
if (r < 0)
return 0;
@@ -822,6 +884,8 @@ static int client_start(sd_dhcp6_client *client, enum DHCP6State state)
break;
case DHCP6_STATE_REQUEST:
+ case DHCP6_STATE_RENEW:
+ case DHCP6_STATE_REBIND:
client->state = state;
@@ -883,6 +947,8 @@ static int client_start(sd_dhcp6_client *client, enum DHCP6State state)
if (r < 0)
return r;
+ client->state = state;
+
return 0;
}