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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.c185
1 files changed, 109 insertions, 76 deletions
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 85162dc555..acb31a16c2 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -3,7 +3,7 @@
/***
This file is part of systemd.
- Copyright (C) 2014 Intel Corporation. All rights reserved.
+ Copyright (C) 2014-2015 Intel Corporation. All rights reserved.
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
@@ -27,7 +27,6 @@
#include "udev.h"
#include "udev-util.h"
#include "util.h"
-#include "refcnt.h"
#include "random-util.h"
#include "network-internal.h"
@@ -40,7 +39,7 @@
#define MAX_MAC_ADDR_LEN INFINIBAND_ALEN
struct sd_dhcp6_client {
- RefCount n_ref;
+ unsigned n_ref;
enum DHCP6State state;
sd_event *event;
@@ -73,6 +72,7 @@ static const uint16_t default_req_opts[] = {
DHCP6_OPTION_DNS_SERVERS,
DHCP6_OPTION_DOMAIN_LIST,
DHCP6_OPTION_NTP_SERVER,
+ DHCP6_OPTION_SNTP_SERVERS,
};
const char * dhcp6_message_type_table[_DHCP6_MESSAGE_MAX] = {
@@ -112,9 +112,7 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(sd_dhcp6_client*, sd_dhcp6_client_unref);
static int client_start(sd_dhcp6_client *client, enum DHCP6State state);
-int sd_dhcp6_client_set_callback(sd_dhcp6_client *client,
- sd_dhcp6_client_cb_t cb, void *userdata)
-{
+int sd_dhcp6_client_set_callback(sd_dhcp6_client *client, sd_dhcp6_client_cb_t cb, void *userdata) {
assert_return(client, -EINVAL);
client->cb = cb;
@@ -123,24 +121,29 @@ int sd_dhcp6_client_set_callback(sd_dhcp6_client *client,
return 0;
}
-int sd_dhcp6_client_set_index(sd_dhcp6_client *client, int interface_index)
-{
+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_mac(sd_dhcp6_client *client, const uint8_t *addr,
- size_t addr_len, uint16_t arp_type)
-{
+int sd_dhcp6_client_set_mac(
+ sd_dhcp6_client *client,
+ const uint8_t *addr, size_t addr_len,
+ uint16_t arp_type) {
+
assert_return(client, -EINVAL);
assert_return(addr, -EINVAL);
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)
@@ -159,20 +162,23 @@ int sd_dhcp6_client_set_mac(sd_dhcp6_client *client, const uint8_t *addr,
return 0;
}
-static int client_ensure_duid(sd_dhcp6_client *client)
-{
+static int client_ensure_duid(sd_dhcp6_client *client) {
if (client->duid_len != 0)
return 0;
+
return dhcp_identifier_set_duid_en(&client->duid, &client->duid_len);
}
-int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint16_t type, uint8_t *duid,
- size_t duid_len)
-{
+int sd_dhcp6_client_set_duid(
+ sd_dhcp6_client *client,
+ uint16_t type,
+ uint8_t *duid, size_t duid_len) {
assert_return(client, -EINVAL);
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))
@@ -202,17 +208,17 @@ int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint16_t type, uint8_t *du
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, bool 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, bool *enabled) {
assert_return(client, -EINVAL);
assert_return(enabled, -EINVAL);
@@ -221,8 +227,7 @@ int sd_dhcp6_client_get_information_request(sd_dhcp6_client *client,
return 0;
}
-int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client,
- uint16_t option) {
+int sd_dhcp6_client_set_request_option(sd_dhcp6_client *client, uint16_t option) {
size_t t;
assert_return(client, -EINVAL);
@@ -259,7 +264,7 @@ int sd_dhcp6_client_get_lease(sd_dhcp6_client *client, sd_dhcp6_lease **ret) {
if (!client->lease)
return -ENOMSG;
- *ret = sd_dhcp6_lease_ref(client->lease);
+ *ret = client->lease;
return 0;
}
@@ -269,9 +274,19 @@ static void client_notify(sd_dhcp6_client *client, int event) {
client->cb(client, event, client->userdata);
}
+static void client_set_lease(sd_dhcp6_client *client, sd_dhcp6_lease *lease) {
+ if (client->lease) {
+ dhcp6_lease_clear_timers(&client->lease->ia);
+ 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);
@@ -462,7 +477,7 @@ 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..." */
@@ -552,7 +567,7 @@ 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;
}
@@ -748,7 +763,36 @@ static int client_parse_message(sd_dhcp6_client *client,
return r;
break;
+
+ case DHCP6_OPTION_DNS_SERVERS:
+ r = dhcp6_lease_set_dns(lease, optval, optlen);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_OPTION_DOMAIN_LIST:
+ r = dhcp6_lease_set_domains(lease, optval, optlen);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_OPTION_NTP_SERVER:
+ r = dhcp6_lease_set_ntp(lease, optval, optlen);
+ if (r < 0)
+ return r;
+
+ break;
+
+ case DHCP6_OPTION_SNTP_SERVERS:
+ r = dhcp6_lease_set_sntp(lease, optval, optlen);
+ if (r < 0)
+ return r;
+
+ break;
}
+
}
if (r == -ENOMSG)
@@ -770,9 +814,7 @@ static int client_parse_message(sd_dhcp6_client *client,
return r;
}
-static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply,
- size_t len)
-{
+static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, size_t len) {
int r;
_cleanup_dhcp6_lease_free_ sd_dhcp6_lease *lease = NULL;
bool rapid_commit;
@@ -797,21 +839,13 @@ static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply,
return 0;
}
- if (client->lease) {
- dhcp6_lease_clear_timers(&client->lease->ia);
- client->lease = sd_dhcp6_lease_unref(client->lease);
- }
-
- if (client->state != DHCP6_STATE_INFORMATION_REQUEST) {
- client->lease = lease;
- lease = NULL;
- }
+ client_set_lease(client, lease);
+ lease = NULL;
return DHCP6_STATE_BOUND;
}
-static int client_receive_advertise(sd_dhcp6_client *client,
- DHCP6Message *advertise, size_t len) {
+static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *advertise, size_t len) {
int r;
_cleanup_dhcp6_lease_free_ sd_dhcp6_lease *lease = NULL;
uint8_t pref_advertise = 0, pref_lease = 0;
@@ -834,8 +868,7 @@ static int client_receive_advertise(sd_dhcp6_client *client,
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;
}
@@ -846,8 +879,7 @@ static int client_receive_advertise(sd_dhcp6_client *client,
return r;
}
-static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
- void *userdata) {
+static int client_receive_message(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
sd_dhcp6_client *client = userdata;
DHCP6_CLIENT_DONT_DESTROY(client);
_cleanup_free_ DHCP6Message *message;
@@ -905,7 +937,7 @@ 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);
@@ -937,7 +969,7 @@ 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;
@@ -958,8 +990,7 @@ static int client_receive_message(sd_event_source *s, int fd, uint32_t revents,
return 0;
}
-static int client_start(sd_dhcp6_client *client, enum DHCP6State state)
-{
+static int client_start(sd_dhcp6_client *client, enum DHCP6State state) {
int r;
usec_t timeout, time_now;
char time_string[FORMAT_TIMESPAN_MAX];
@@ -975,14 +1006,9 @@ static int client_start(sd_dhcp6_client *client, enum DHCP6State state)
client->retransmit_time = 0;
client->retransmit_count = 0;
- if (client->state == DHCP6_STATE_STOPPED) {
- time_now = now(clock_boottime_or_monotonic());
- } else {
- r = sd_event_now(client->event, clock_boottime_or_monotonic(),
- &time_now);
- if (r < 0)
- return r;
- }
+ r = sd_event_now(client->event, clock_boottime_or_monotonic(), &time_now);
+ if (r < 0)
+ return r;
switch (state) {
case DHCP6_STATE_STOPPED:
@@ -1093,15 +1119,13 @@ static int client_start(sd_dhcp6_client *client, enum DHCP6State state)
return 0;
}
-int sd_dhcp6_client_stop(sd_dhcp6_client *client)
-{
- client_stop(client, DHCP6_EVENT_STOP);
+int sd_dhcp6_client_stop(sd_dhcp6_client *client) {
+ client_stop(client, SD_DHCP6_CLIENT_EVENT_STOP);
return 0;
}
-int sd_dhcp6_client_start(sd_dhcp6_client *client)
-{
+int sd_dhcp6_client_start(sd_dhcp6_client *client) {
int r = 0;
enum DHCP6State state = DHCP6_STATE_SOLICITATION;
@@ -1109,6 +1133,9 @@ int sd_dhcp6_client_start(sd_dhcp6_client *client)
assert_return(client->event, -EINVAL);
assert_return(client->index > 0, -EINVAL);
+ if (!IN_SET(client->state, DHCP6_STATE_STOPPED))
+ return -EALREADY;
+
r = client_reset(client);
if (r < 0)
return r;
@@ -1157,9 +1184,7 @@ error:
return r;
}
-int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event,
- int priority)
-{
+int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event, int priority) {
int r;
assert_return(client, -EINVAL);
@@ -1194,30 +1219,38 @@ sd_event *sd_dhcp6_client_get_event(sd_dhcp6_client *client) {
}
sd_dhcp6_client *sd_dhcp6_client_ref(sd_dhcp6_client *client) {
- if (client)
- assert_se(REFCNT_INC(client->n_ref) >= 2);
+
+ if (!client)
+ return NULL;
+
+ assert(client->n_ref >= 1);
+ client->n_ref++;
return client;
}
sd_dhcp6_client *sd_dhcp6_client_unref(sd_dhcp6_client *client) {
- if (client && REFCNT_DEC(client->n_ref) == 0) {
- client_reset(client);
- sd_dhcp6_client_detach_event(client);
- sd_dhcp6_lease_unref(client->lease);
+ if (!client)
+ return NULL;
- free(client->req_opts);
- free(client);
+ assert(client->n_ref >= 1);
+ client->n_ref--;
+ if (client->n_ref > 0)
return NULL;
- }
- return client;
+ client_reset(client);
+
+ sd_dhcp6_client_detach_event(client);
+
+ free(client->req_opts);
+ free(client);
+
+ return NULL;
}
-int sd_dhcp6_client_new(sd_dhcp6_client **ret)
-{
+int sd_dhcp6_client_new(sd_dhcp6_client **ret) {
_cleanup_dhcp6_client_unref_ sd_dhcp6_client *client = NULL;
size_t t;
@@ -1227,7 +1260,7 @@ int sd_dhcp6_client_new(sd_dhcp6_client **ret)
if (!client)
return -ENOMEM;
- client->n_ref = REFCNT_INIT;
+ client->n_ref = 1;
client->ia_na.type = DHCP6_OPTION_IA_NA;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-04-07 04:00:42 +0000