--- /dev/null
+diff -up dhcp-4.2.1-P1/client/dhc6.c.sendDecline dhcp-4.2.1-P1/client/dhc6.c
+--- dhcp-4.2.1-P1/client/dhc6.c.sendDecline 2010-09-10 22:27:11.000000000 +0200
++++ dhcp-4.2.1-P1/client/dhc6.c 2011-06-17 14:19:48.992099868 +0200
+@@ -95,6 +95,8 @@ void do_select6(void *input);
+ void do_refresh6(void *input);
+ static void do_release6(void *input);
+ static void start_bound(struct client_state *client);
++static void start_decline6(struct client_state *client);
++static void do_decline6(void *input);
+ static void start_informed(struct client_state *client);
+ void informed_handler(struct packet *packet, struct client_state *client);
+ void bound_handler(struct packet *packet, struct client_state *client);
+@@ -2075,6 +2077,7 @@ start_release6(struct client_state *clie
+ cancel_timeout(do_select6, client);
+ cancel_timeout(do_refresh6, client);
+ cancel_timeout(do_release6, client);
++ cancel_timeout(do_decline6, client);
+ client->state = S_STOPPED;
+
+ /*
+@@ -2708,6 +2711,7 @@ dhc6_check_reply(struct client_state *cl
+ break;
+
+ case S_STOPPED:
++ case S_DECLINED:
+ action = dhc6_stop_action;
+ break;
+
+@@ -2809,6 +2813,7 @@ dhc6_check_reply(struct client_state *cl
+ break;
+
+ case S_STOPPED:
++ case S_DECLINED:
+ /* Nothing critical to do at this stage. */
+ break;
+
+@@ -3799,17 +3804,23 @@ reply_handler(struct packet *packet, str
+ cancel_timeout(do_select6, client);
+ cancel_timeout(do_refresh6, client);
+ cancel_timeout(do_release6, client);
++ cancel_timeout(do_decline6, client);
+
+ /* If this is in response to a Release/Decline, clean up and return. */
+- if (client->state == S_STOPPED) {
+- if (client->active_lease == NULL)
+- return;
++ if ((client->state == S_STOPPED) ||
++ (client->state == S_DECLINED)) {
++
++ if (client->active_lease != NULL) {
++ dhc6_lease_destroy(&client->active_lease, MDL);
++ client->active_lease = NULL;
++ /* We should never wait for nothing!? */
++ if (stopping_finished())
++ exit(0);
++ }
++
++ if (client->state == S_DECLINED)
++ start_init6(client);
+
+- dhc6_lease_destroy(&client->active_lease, MDL);
+- client->active_lease = NULL;
+- /* We should never wait for nothing!? */
+- if (stopping_finished())
+- exit(0);
+ return;
+ }
+
+@@ -4336,7 +4347,11 @@ start_bound(struct client_state *client)
+ oldia, oldaddr);
+ dhc6_marshall_values("new_", client, lease, ia, addr);
+
+- script_go(client);
++ // when script returns 3, DAD failed
++ if (script_go(client) == 3) {
++ start_decline6(client);
++ return;
++ }
+ }
+
+ /* XXX: maybe we should loop on the old values instead? */
+@@ -4382,6 +4397,149 @@ start_bound(struct client_state *client)
+ dhc6_check_times(client);
+ }
+
++/*
++ * Decline addresses.
++ */
++void
++start_decline6(struct client_state *client)
++{
++ /* Cancel any pending transmissions */
++ cancel_timeout(do_confirm6, client);
++ cancel_timeout(do_select6, client);
++ cancel_timeout(do_refresh6, client);
++ cancel_timeout(do_release6, client);
++ cancel_timeout(do_decline6, client);
++ client->state = S_DECLINED;
++
++ if (client->active_lease == NULL)
++ return;
++
++ /* Set timers per RFC3315 section 18.1.7. */
++ client->IRT = DEC_TIMEOUT * 100;
++ client->MRT = 0;
++ client->MRC = DEC_MAX_RC;
++ client->MRD = 0;
++
++ dhc6_retrans_init(client);
++ client->v6_handler = reply_handler;
++
++ client->refresh_type = DHCPV6_DECLINE;
++ do_decline6(client);
++}
++
++/*
++ * do_decline6() creates a Decline packet and transmits it.
++ */
++static void
++do_decline6(void *input)
++{
++ struct client_state *client;
++ struct data_string ds;
++ int send_ret;
++ struct timeval elapsed, tv;
++
++ client = input;
++
++ if ((client->active_lease == NULL) || !active_prefix(client))
++ return;
++
++ if ((client->MRC != 0) && (client->txcount > client->MRC)) {
++ log_info("Max retransmission count exceeded.");
++ goto decline_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;
++ }
++
++ /* 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;
++ }
++
++ memset(&ds, 0, sizeof(ds));
++ if (!buffer_allocate(&ds.buffer, 4, MDL)) {
++ log_error("Unable to allocate memory for Decline.");
++ goto decline_done;
++ }
++
++ ds.data = ds.buffer->data;
++ ds.len = 4;
++ ds.buffer->data[0] = DHCPV6_DECLINE;
++ 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;
++ }
++
++ client->elapsed = htons(client->elapsed);
++
++ log_debug("XMT: Forming Decline.");
++ make_client6_options(client, &client->sent_options,
++ client->active_lease, DHCPV6_DECLINE);
++ dhcpv6_universe.encapsulate(&ds, NULL, NULL, client, NULL,
++ client->sent_options, &global_scope,
++ &dhcpv6_universe);
++
++ /* Append IA's (but don't release temporary addresses). */
++ if (wanted_ia_na &&
++ dhc6_add_ia_na(client, &ds, client->active_lease,
++ DHCPV6_DECLINE) != ISC_R_SUCCESS) {
++ data_string_forget(&ds, MDL);
++ goto decline_done;
++ }
++ if (wanted_ia_pd &&
++ dhc6_add_ia_pd(client, &ds, client->active_lease,
++ DHCPV6_DECLINE) != ISC_R_SUCCESS) {
++ data_string_forget(&ds, MDL);
++ goto decline_done;
++ }
++
++ /* Transmit and wait. */
++ log_info("XMT: Decline on %s, interval %ld0ms.",
++ client->name ? client->name : client->interface->name,
++ (long int)client->RT);
++
++ send_ret = send_packet6(client->interface, ds.data, ds.len,
++ &DHCPv6DestAddr);
++ if (send_ret != ds.len) {
++ log_error("dhc6: sendpacket6() sent %d of %d bytes",
++ send_ret, ds.len);
++ }
++
++ data_string_forget(&ds, MDL);
++
++ /* Wait RT */
++ tv.tv_sec = cur_tv.tv_sec + client->RT / 100;
++ tv.tv_usec = cur_tv.tv_usec + (client->RT % 100) * 10000;
++ if (tv.tv_usec >= 1000000) {
++ tv.tv_sec += 1;
++ tv.tv_usec -= 1000000;
++ }
++ add_timeout(&tv, do_decline6, client, NULL, NULL);
++ dhc6_retrans_advance(client);
++ return;
++
++decline_done:
++ dhc6_lease_destroy(&client->active_lease, MDL);
++ client->active_lease = NULL;
++ start_init6(client);
++ return;
++}
++
+ /* While bound, ignore packets. In the future we'll want to answer
+ * Reconfigure-Request messages and the like.
+ */
projects / people / ms / ipfire-3.x.git / blobdiff