/* dhc6.c - DHCPv6 client routines. */
/*
- * Copyright (c) 2006-2009 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2006-2010 by Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
struct option_state *options);
static isc_boolean_t active_prefix(struct client_state *client);
+static int check_timing6(struct client_state *client, u_int8_t msg_type,
+ char *msg_str, struct dhc6_lease *lease,
+ struct data_string *ds);
+
extern int onetry;
extern int stateless;
}
/*
- * do_init6() marshals and transmits a solicit.
+ * check_timing6() check on the timing for sending a v6 message
+ * and then do the basic initialization for a v6 message.
*/
-void
-do_init6(void *input)
+#define CHK_TIM_SUCCESS 0
+#define CHK_TIM_MRC_EXCEEDED 1
+#define CHK_TIM_MRD_EXCEEDED 2
+#define CHK_TIM_ALLOC_FAILURE 3
+
+int
+check_timing6 (struct client_state *client, u_int8_t msg_type,
+ char *msg_str, struct dhc6_lease *lease,
+ struct data_string *ds)
{
- struct client_state *client;
- struct dhc6_ia *old_ia;
- struct dhc6_addr *old_addr;
- struct data_string ds;
- struct data_string ia;
- struct data_string addr;
- struct timeval elapsed, tv;
- u_int32_t t1, t2;
- int i, idx, len, send_ret;
-
- client = input;
-
- /*
- * In RFC3315 section 17.1.2, the retransmission timer is
- * used as the selecting timer.
- */
- if (client->advertised_leases != NULL) {
- start_selecting6(client);
- return;
- }
-
- if ((client->MRC != 0) && (client->txcount > client->MRC)) {
- log_info("Max retransmission count exceeded.");
- return;
- }
+ struct timeval elapsed;
/*
* Start_time starts at the first transmission.
if (client->txcount == 0) {
client->start_time.tv_sec = cur_tv.tv_sec;
client->start_time.tv_usec = cur_tv.tv_usec;
+ } else if ((client->MRC != 0) && (client->txcount > client->MRC)) {
+ log_info("Max retransmission count exceeded.");
+ return(CHK_TIM_MRC_EXCEEDED);
}
/* elapsed = cur - start */
elapsed.tv_sec -= 1;
elapsed.tv_usec += 1000000;
}
+
/* Check if finished (-1 argument). */
if ((client->MRD != 0) && (elapsed.tv_sec > client->MRD)) {
log_info("Max retransmission duration exceeded.");
- client->state = S_STOPPED;
- if (client->active_lease != NULL) {
- dhc6_lease_destroy(&client->active_lease, MDL);
- client->active_lease = NULL;
- }
- /* Stop if and only if this is the last client. */
- if (stopping_finished())
- exit(2);
- return;
+ return(CHK_TIM_MRD_EXCEEDED);
}
- memset(&ds, 0, sizeof(ds));
- if (!buffer_allocate(&ds.buffer, 4, MDL)) {
- log_error("Unable to allocate memory for SOLICIT.");
- return;
+ memset(ds, 0, sizeof(*ds));
+ if (!buffer_allocate(&(ds->buffer), 4, MDL)) {
+ log_error("Unable to allocate memory for %s.", msg_str);
+ return(CHK_TIM_ALLOC_FAILURE);
}
- ds.data = ds.buffer->data;
- ds.len = 4;
+ ds->data = ds->buffer->data;
+ ds->len = 4;
- ds.buffer->data[0] = DHCPV6_SOLICIT;
- memcpy(ds.buffer->data + 1, client->dhcpv6_transaction_id, 3);
+ ds->buffer->data[0] = msg_type;
+ memcpy(ds->buffer->data + 1, client->dhcpv6_transaction_id, 3);
/* Form an elapsed option. */
/* Maximum value is 65535 1/100s coded as 0xffff. */
}
if (client->elapsed == 0)
- log_debug("XMT: Forming Solicit, 0 ms elapsed.");
+ log_debug("XMT: Forming %s, 0 ms elapsed.", msg_str);
else
- log_debug("XMT: Forming Solicit, %u0 ms elapsed.",
+ log_debug("XMT: Forming %s, %u0 ms elapsed.", msg_str,
(unsigned)client->elapsed);
client->elapsed = htons(client->elapsed);
- make_client6_options(client, &client->sent_options, NULL,
- DHCPV6_SOLICIT);
+ make_client6_options(client, &client->sent_options, lease, msg_type);
+
+ return(CHK_TIM_SUCCESS);
+}
+
+/*
+ * do_init6() marshals and transmits a solicit.
+ */
+void
+do_init6(void *input)
+{
+ struct client_state *client;
+ struct dhc6_ia *old_ia;
+ struct dhc6_addr *old_addr;
+ struct data_string ds;
+ struct data_string ia;
+ struct data_string addr;
+ struct timeval tv;
+ u_int32_t t1, t2;
+ int i, idx, len, send_ret;
+
+ client = input;
+
+ /*
+ * In RFC3315 section 17.1.2, the retransmission timer is
+ * used as the selecting timer.
+ */
+ if (client->advertised_leases != NULL) {
+ start_selecting6(client);
+ return;
+ }
+
+ switch(check_timing6(client, DHCPV6_SOLICIT, "Solicit", NULL, &ds)) {
+ case CHK_TIM_MRC_EXCEEDED:
+ case CHK_TIM_ALLOC_FAILURE:
+ return;
+ case CHK_TIM_MRD_EXCEEDED:
+ client->state = S_STOPPED;
+ if (client->active_lease != NULL) {
+ dhc6_lease_destroy(&client->active_lease, MDL);
+ client->active_lease = NULL;
+ }
+ /* Stop if and only if this is the last client. */
+ if (stopping_finished())
+ exit(2);
+ return;
+ }
/*
* Fetch any configured 'sent' options (includes DUID) in wire format.
{
struct client_state *client;
struct data_string ds;
- struct timeval elapsed, tv;
+ struct timeval tv;
int send_ret;
client = input;
- if ((client->MRC != 0) && (client->txcount > client->MRC)) {
- log_info("Max retransmission count exceeded.");
+ switch(check_timing6(client, DHCPV6_INFORMATION_REQUEST,
+ "Info-Request", NULL, &ds)) {
+ case CHK_TIM_MRC_EXCEEDED:
+ case CHK_TIM_ALLOC_FAILURE:
return;
- }
-
- /*
- * Start_time starts at the first transmission.
- */
- if (client->txcount == 0) {
- client->start_time.tv_sec = cur_tv.tv_sec;
- client->start_time.tv_usec = cur_tv.tv_usec;
- }
-
- /* elapsed = cur - start */
- elapsed.tv_sec = cur_tv.tv_sec - client->start_time.tv_sec;
- elapsed.tv_usec = cur_tv.tv_usec - client->start_time.tv_usec;
- if (elapsed.tv_usec < 0) {
- elapsed.tv_sec -= 1;
- elapsed.tv_usec += 1000000;
- }
- /* Check if finished (-1 argument). */
- if ((client->MRD != 0) && (elapsed.tv_sec > client->MRD)) {
- log_info("Max retransmission duration exceeded.");
+ case CHK_TIM_MRD_EXCEEDED:
exit(2);
+ case CHK_TIM_SUCCESS:
+ break;
}
- memset(&ds, 0, sizeof(ds));
- if (!buffer_allocate(&ds.buffer, 4, MDL)) {
- log_error("Unable to allocate memory for INFO-REQUEST.");
- return;
- }
- ds.data = ds.buffer->data;
- ds.len = 4;
-
- ds.buffer->data[0] = DHCPV6_INFORMATION_REQUEST;
- memcpy(ds.buffer->data + 1, client->dhcpv6_transaction_id, 3);
-
- /* Form an elapsed option. */
- /* Maximum value is 65535 1/100s coded as 0xffff. */
- if ((elapsed.tv_sec < 0) || (elapsed.tv_sec > 655) ||
- ((elapsed.tv_sec == 655) && (elapsed.tv_usec > 350000))) {
- client->elapsed = 0xffff;
- } else {
- client->elapsed = elapsed.tv_sec * 100;
- client->elapsed += elapsed.tv_usec / 10000;
- }
-
- if (client->elapsed == 0)
- log_debug("XMT: Forming Info-Request, 0 ms elapsed.");
- else
- log_debug("XMT: Forming Info-Request, %u0 ms elapsed.",
- (unsigned)client->elapsed);
-
- client->elapsed = htons(client->elapsed);
-
- make_client6_options(client, &client->sent_options, NULL,
- DHCPV6_INFORMATION_REQUEST);
-
/* Fetch any configured 'sent' options (includes DUID) in wire format.
*/
dhcpv6_universe.encapsulate(&ds, NULL, NULL, client,
struct client_state *client;
struct data_string ds;
int send_ret;
- struct timeval elapsed, tv;
+ struct timeval tv;
client = input;
* stick there until we get a reply?
*/
- if ((client->MRC != 0) && (client->txcount > client->MRC)) {
- log_info("Max retransmission count exceeded.");
+ switch(check_timing6(client, DHCPV6_CONFIRM, "Confirm",
+ client->active_lease, &ds)) {
+ case CHK_TIM_MRC_EXCEEDED:
+ case CHK_TIM_MRD_EXCEEDED:
start_bound(client);
return;
- }
-
- /*
- * Start_time starts at the first transmission.
- */
- if (client->txcount == 0) {
- client->start_time.tv_sec = cur_tv.tv_sec;
- client->start_time.tv_usec = cur_tv.tv_usec;
- }
-
- /* elapsed = cur - start */
- elapsed.tv_sec = cur_tv.tv_sec - client->start_time.tv_sec;
- elapsed.tv_usec = cur_tv.tv_usec - client->start_time.tv_usec;
- if (elapsed.tv_usec < 0) {
- elapsed.tv_sec -= 1;
- elapsed.tv_usec += 1000000;
- }
- if ((client->MRD != 0) && (elapsed.tv_sec > client->MRD)) {
- log_info("Max retransmission duration exceeded.");
- start_bound(client);
+ case CHK_TIM_ALLOC_FAILURE:
return;
+ case CHK_TIM_SUCCESS:
+ break;
}
- memset(&ds, 0, sizeof(ds));
- if (!buffer_allocate(&ds.buffer, 4, MDL)) {
- log_error("Unable to allocate memory for Confirm.");
- return;
- }
- ds.data = ds.buffer->data;
- ds.len = 4;
-
- ds.buffer->data[0] = DHCPV6_CONFIRM;
- memcpy(ds.buffer->data + 1, client->dhcpv6_transaction_id, 3);
-
- /* Form an elapsed option. */
- /* Maximum value is 65535 1/100s coded as 0xffff. */
- if ((elapsed.tv_sec < 0) || (elapsed.tv_sec > 655) ||
- ((elapsed.tv_sec == 655) && (elapsed.tv_usec > 350000))) {
- client->elapsed = 0xffff;
- } else {
- client->elapsed = elapsed.tv_sec * 100;
- client->elapsed += elapsed.tv_usec / 10000;
- }
-
- if (client->elapsed == 0)
- log_debug("XMT: Forming Confirm, 0 ms elapsed.");
- else
- log_debug("XMT: Forming Confirm, %u0 ms elapsed.",
- (unsigned)client->elapsed);
-
- client->elapsed = htons(client->elapsed);
-
- make_client6_options(client, &client->sent_options,
- client->active_lease, DHCPV6_CONFIRM);
-
/* Fetch any configured 'sent' options (includes DUID') in wire format.
*/
dhcpv6_universe.encapsulate(&ds, NULL, NULL, client, NULL,
if ((client->active_lease == NULL) || !active_prefix(client))
return;
- if ((client->MRC != 0) && (client->txcount > client->MRC)) {
- log_info("Max retransmission count exceeded.");
+ switch(check_timing6(client, DHCPV6_RELEASE, "Release",
+ client->active_lease, &ds)) {
+ case CHK_TIM_MRC_EXCEEDED:
+ case CHK_TIM_ALLOC_FAILURE:
+ case CHK_TIM_MRD_EXCEEDED:
goto release_done;
- }
-
- /*
- * Start_time starts at the first transmission.
- */
- if (client->txcount == 0) {
- client->start_time.tv_sec = cur_tv.tv_sec;
- client->start_time.tv_usec = cur_tv.tv_usec;
+ case CHK_TIM_SUCCESS:
+ break;
}
/*
* available address with enough scope.
*/
- memset(&ds, 0, sizeof(ds));
- if (!buffer_allocate(&ds.buffer, 4, MDL)) {
- log_error("Unable to allocate memory for Release.");
- goto release_done;
- }
-
- ds.data = ds.buffer->data;
- ds.len = 4;
- ds.buffer->data[0] = DHCPV6_RELEASE;
- memcpy(ds.buffer->data + 1, client->dhcpv6_transaction_id, 3);
-
- log_debug("XMT: Forming Release.");
- make_client6_options(client, &client->sent_options,
- client->active_lease, DHCPV6_RELEASE);
dhcpv6_universe.encapsulate(&ds, NULL, NULL, client, NULL,
client->sent_options, &global_scope,
&dhcpv6_universe);
struct client_state *client;
struct dhc6_lease *lease;
struct data_string ds;
- struct timeval elapsed, tv;
- int abort = ISC_FALSE;
+ struct timeval tv;
int send_ret;
client = input;
return;
}
- if ((client->MRC != 0) && (client->txcount > client->MRC)) {
- log_info("Max retransmission count exceeded.");
- abort = ISC_TRUE;
- }
-
- /*
- * Start_time starts at the first transmission.
- */
- if (client->txcount == 0) {
- client->start_time.tv_sec = cur_tv.tv_sec;
- client->start_time.tv_usec = cur_tv.tv_usec;
- }
-
- /* elapsed = cur - start */
- elapsed.tv_sec = cur_tv.tv_sec - client->start_time.tv_sec;
- elapsed.tv_usec = cur_tv.tv_usec - client->start_time.tv_usec;
- if (elapsed.tv_usec < 0) {
- elapsed.tv_sec -= 1;
- elapsed.tv_usec += 1000000;
- }
- if ((client->MRD != 0) && (elapsed.tv_sec > client->MRD)) {
- log_info("Max retransmission duration exceeded.");
- abort = ISC_TRUE;
- }
-
- if (abort) {
+ switch(check_timing6(client, DHCPV6_REQUEST, "Request", lease, &ds)) {
+ case CHK_TIM_MRC_EXCEEDED:
+ case CHK_TIM_MRD_EXCEEDED:
log_debug("PRC: Lease %s failed.",
print_hex_1(lease->server_id.len,
lease->server_id.data, 56));
start_selecting6(client);
else
start_init6(client);
-
return;
+ case CHK_TIM_ALLOC_FAILURE:
+ return;
+ case CHK_TIM_SUCCESS:
+ break;
}
/* Now make a packet that looks suspiciously like the one we
* construct for the iaid, then we can delve into this matter
* more properly. In the time being, this will work.
*/
- memset(&ds, 0, sizeof(ds));
- if (!buffer_allocate(&ds.buffer, 4, MDL)) {
- log_error("Unable to allocate memory for REQUEST.");
- return;
- }
- ds.data = ds.buffer->data;
- ds.len = 4;
-
- ds.buffer->data[0] = DHCPV6_REQUEST;
- memcpy(ds.buffer->data + 1, client->dhcpv6_transaction_id, 3);
-
- /* Form an elapsed option. */
- /* Maximum value is 65535 1/100s coded as 0xffff. */
- if ((elapsed.tv_sec < 0) || (elapsed.tv_sec > 655) ||
- ((elapsed.tv_sec == 655) && (elapsed.tv_usec > 350000))) {
- client->elapsed = 0xffff;
- } else {
- client->elapsed = elapsed.tv_sec * 100;
- client->elapsed += elapsed.tv_usec / 10000;
- }
-
- if (client->elapsed == 0)
- log_debug("XMT: Forming Request, 0 ms elapsed.");
- else
- log_debug("XMT: Forming Request, %u0 ms elapsed.",
- (unsigned)client->elapsed);
-
- client->elapsed = htons(client->elapsed);
-
- make_client6_options(client, &client->sent_options, lease,
- DHCPV6_REQUEST);
/* Fetch any configured 'sent' options (includes DUID) in wire format.
*/
projects / thirdparty / dhcp.git / commitdiff
