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path: root/src/libsystemd-network/sd-dhcp6-client.c
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Diffstat (limited to 'src/libsystemd-network/sd-dhcp6-client.c')
-rw-r--r--src/libsystemd-network/sd-dhcp6-client.c105
1 files changed, 66 insertions, 39 deletions
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 5489c77864..801331d270 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -24,17 +24,19 @@
#include <sys/ioctl.h>
#include <linux/if_infiniband.h>
-#include "udev.h"
-#include "udev-util.h"
-#include "util.h"
-#include "random-util.h"
-
-#include "network-internal.h"
#include "sd-dhcp6-client.h"
-#include "dhcp6-protocol.h"
+
+#include "alloc-util.h"
+#include "dhcp-identifier.h"
#include "dhcp6-internal.h"
#include "dhcp6-lease-internal.h"
-#include "dhcp-identifier.h"
+#include "dhcp6-protocol.h"
+#include "fd-util.h"
+#include "in-addr-util.h"
+#include "network-internal.h"
+#include "random-util.h"
+#include "string-table.h"
+#include "util.h"
#define MAX_MAC_ADDR_LEN INFINIBAND_ALEN
@@ -45,6 +47,7 @@ struct sd_dhcp6_client {
sd_event *event;
int event_priority;
int index;
+ struct in6_addr local_address;
uint8_t mac_addr[MAX_MAC_ADDR_LEN];
size_t mac_addr_len;
uint16_t arp_type;
@@ -125,11 +128,25 @@ int sd_dhcp6_client_set_index(sd_dhcp6_client *client, int interface_index) {
assert_return(client, -EINVAL);
assert_return(interface_index >= -1, -EINVAL);
+ assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
+
client->index = interface_index;
return 0;
}
+int sd_dhcp6_client_set_local_address(sd_dhcp6_client *client, const struct in6_addr *local_address) {
+ assert_return(client, -EINVAL);
+ assert_return(local_address, -EINVAL);
+ assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) local_address) > 0, -EINVAL);
+
+ assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
+
+ client->local_address = *local_address;
+
+ return 0;
+}
+
int sd_dhcp6_client_set_mac(
sd_dhcp6_client *client,
const uint8_t *addr, size_t addr_len,
@@ -140,6 +157,8 @@ int sd_dhcp6_client_set_mac(
assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL);
assert_return(arp_type > 0, -EINVAL);
+ assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
+
if (arp_type == ARPHRD_ETHER)
assert_return(addr_len == ETH_ALEN, -EINVAL);
else if (arp_type == ARPHRD_INFINIBAND)
@@ -173,6 +192,8 @@ int sd_dhcp6_client_set_duid(
assert_return(duid, -EINVAL);
assert_return(duid_len > 0 && duid_len <= MAX_DUID_LEN, -EINVAL);
+ assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
+
switch (type) {
case DHCP6_DUID_LLT:
if (duid_len <= sizeof(client->duid.llt))
@@ -202,15 +223,16 @@ int sd_dhcp6_client_set_duid(
return 0;
}
-int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, bool enabled) {
+int sd_dhcp6_client_set_information_request(sd_dhcp6_client *client, int enabled) {
assert_return(client, -EINVAL);
+ assert_return(IN_SET(client->state, DHCP6_STATE_STOPPED), -EBUSY);
client->information_request = enabled;
return 0;
}
-int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, bool *enabled) {
+int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client, int *enabled) {
assert_return(client, -EINVAL);
assert_return(enabled, -EINVAL);
@@ -251,12 +273,12 @@ int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option)
int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) {
assert_return(client, -EINVAL);
- assert_return(ret, -EINVAL);
if (!client->lease)
return -ENOMSG;
- *ret = client->lease;
+ if (ret)
+ *ret = client->lease;
return 0;
}
@@ -266,13 +288,18 @@ static void client_notify(sd_dhcp6_client *client, int event) {
client->cb(client, event, client->userdata);
}
-static int client_reset(sd_dhcp6_client *client) {
- assert_return(client, -EINVAL);
-
+static void client_set_lease(sd_dhcp6_client *client, sd_dhcp6_lease *lease) {
if (client->lease) {
dhcp6_lease_clear_timers(&client->lease->ia);
- client->lease = sd_dhcp6_lease_unref(client->lease);
+ sd_dhcp6_lease_unref(client->lease);
}
+ client->lease = lease;
+}
+
+static int client_reset(sd_dhcp6_client *client) {
+ assert_return(client, -EINVAL);
+
+ client_set_lease(client, NULL);
client->receive_message =
sd_event_source_unref(client->receive_message);
@@ -464,7 +491,7 @@ static int client_timeout_resend_expire(sd_event_source *s, uint64_t usec,
state = client->state;
- client_stop(client, DHCP6_EVENT_RESEND_EXPIRE);
+ client_stop(client, SD_DHCP6_CLIENT_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..." */
@@ -554,7 +581,7 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
if (max_retransmit_count &&
client->retransmit_count >= max_retransmit_count) {
- client_stop(client, DHCP6_EVENT_RETRANS_MAX);
+ client_stop(client, SD_DHCP6_CLIENT_EVENT_RETRANS_MAX);
return 0;
}
@@ -582,8 +609,7 @@ static int client_timeout_resend(sd_event_source *s, uint64_t usec,
}
log_dhcp6_client(client, "Next retransmission in %s",
- format_timespan(time_string, FORMAT_TIMESPAN_MAX,
- client->retransmit_time, 0));
+ format_timespan(time_string, FORMAT_TIMESPAN_MAX, client->retransmit_time, USEC_PER_SEC));
r = sd_event_add_time(client->event, &client->timeout_resend,
clock_boottime_or_monotonic(),
@@ -826,12 +852,7 @@ static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, si
return 0;
}
- if (client->lease) {
- dhcp6_lease_clear_timers(&client->lease->ia);
- client->lease = sd_dhcp6_lease_unref(client->lease);
- }
-
- client->lease = lease;
+ client_set_lease(client, lease);
lease = NULL;
return DHCP6_STATE_BOUND;
@@ -860,8 +881,7 @@ static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *adver
r = dhcp6_lease_get_preference(client->lease, &pref_lease);
if (r < 0 || pref_advertise > pref_lease) {
- sd_dhcp6_lease_unref(client->lease);
- client->lease = lease;
+ client_set_lease(client, lease);
lease = NULL;
r = 0;
}
@@ -930,7 +950,7 @@ static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
if (r < 0)
return 0;
- client_notify(client, DHCP6_EVENT_INFORMATION_REQUEST);
+ client_notify(client, SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST);
client_start(client, DHCP6_STATE_STOPPED);
@@ -962,7 +982,7 @@ static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
return 0;
}
- client_notify(client, DHCP6_EVENT_IP_ACQUIRE);
+ client_notify(client, SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE);
}
break;
@@ -1041,9 +1061,7 @@ static int client_start(sd_dhcp6_client *client, enum DHCP6State state) {
timeout = client_timeout_compute_random(be32toh(client->lease->ia.lifetime_t1) * USEC_PER_SEC);
log_dhcp6_client(client, "T1 expires in %s",
- format_timespan(time_string,
- FORMAT_TIMESPAN_MAX,
- timeout, 0));
+ format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC));
r = sd_event_add_time(client->event,
&client->lease->ia.timeout_t1,
@@ -1065,9 +1083,7 @@ static int client_start(sd_dhcp6_client *client, enum DHCP6State state) {
timeout = client_timeout_compute_random(be32toh(client->lease->ia.lifetime_t2) * USEC_PER_SEC);
log_dhcp6_client(client, "T2 expires in %s",
- format_timespan(time_string,
- FORMAT_TIMESPAN_MAX,
- timeout, 0));
+ format_timespan(time_string, FORMAT_TIMESPAN_MAX, timeout, USEC_PER_SEC));
r = sd_event_add_time(client->event,
&client->lease->ia.timeout_t2,
@@ -1113,11 +1129,19 @@ static int client_start(sd_dhcp6_client *client, enum DHCP6State state) {
}
int sd_dhcp6_client_stop(sd_dhcp6_client *client) {
- client_stop(client, DHCP6_EVENT_STOP);
+ assert_return(client, -EINVAL);
+
+ client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP);
return 0;
}
+int sd_dhcp6_client_is_running(sd_dhcp6_client *client) {
+ assert_return(client, -EINVAL);
+
+ return client->state != DHCP6_STATE_STOPPED;
+}
+
int sd_dhcp6_client_start(sd_dhcp6_client *client) {
int r = 0;
enum DHCP6State state = DHCP6_STATE_SOLICITATION;
@@ -1125,6 +1149,10 @@ int sd_dhcp6_client_start(sd_dhcp6_client *client) {
assert_return(client, -EINVAL);
assert_return(client->event, -EINVAL);
assert_return(client->index > 0, -EINVAL);
+ assert_return(in_addr_is_link_local(AF_INET6, (const union in_addr_union *) &client->local_address) > 0, -EINVAL);
+
+ if (!IN_SET(client->state, DHCP6_STATE_STOPPED))
+ return -EBUSY;
r = client_reset(client);
if (r < 0)
@@ -1138,7 +1166,7 @@ int sd_dhcp6_client_start(sd_dhcp6_client *client) {
if (r < 0)
return r;
- r = dhcp6_network_bind_udp_socket(client->index, NULL);
+ r = dhcp6_network_bind_udp_socket(client->index, &client->local_address);
if (r < 0)
return r;
@@ -1233,7 +1261,6 @@ sd_dhcp6_client *sd_dhcp6_client_unref(sd_dhcp6_client *client) {
client_reset(client);
sd_dhcp6_client_detach_event(client);
- sd_dhcp6_lease_unref(client->lease);
free(client->req_opts);
free(client);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-05-29 23:57:45 +0000