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04852d2877cf94d80d17d0e3f46eb1d286a0ecdb
NetworkManager/src/dhcp-manager/nm-dhcp-systemd.c
Thomas Haller 04852d2877 dhcp: log setting and clearing systemd dhcp client instance 
internal systemd code produces logging messages by itself, like
  libsystemd: DHCP CLIENT (0x9204b5ce): ACK

Let's log the pointer value initially, to associate the logged "xid"
with the pointer value of the client.

Now we get:

  <trace> [1464520695.7655] dhcp4 (enp0s25): dhcp-client4: set 0x556cdd9d6800
  <debug> [1464520695.7658] libsystemd: DHCP CLIENT (0x9d87b7c5): STARTED on ifindex 2
2016-05-29 13:33:07 +02:00

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2014 Red Hat, Inc.
*/
#include "nm-default.h"
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <net/if_arp.h>
#include "nm-dhcp-systemd.h"
#include "nm-utils.h"
#include "nm-dhcp-utils.h"
#include "NetworkManagerUtils.h"
#include "nm-platform.h"
#include "nm-dhcp-client-logging.h"
#include "sd-dhcp-client.h"
#include "sd-dhcp6-client.h"
#include "nm-sd-adapt.h"
#include "dhcp-lease-internal.h"
G_DEFINE_TYPE (NMDhcpSystemd, nm_dhcp_systemd, NM_TYPE_DHCP_CLIENT)
#define NM_DHCP_SYSTEMD_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_DHCP_SYSTEMD, NMDhcpSystemdPrivate))
typedef struct {
sd_dhcp_client *client4;
sd_dhcp6_client *client6;
char *lease_file;
guint request_count;
gboolean privacy;
gboolean info_only;
} NMDhcpSystemdPrivate;
/************************************************************/
#define DHCP_OPTION_NIS_DOMAIN 40
#define DHCP_OPTION_NIS_SERVERS 41
#define DHCP_OPTION_DOMAIN_SEARCH 119
#define DHCP_OPTION_MS_ROUTES 249
#define DHCP_OPTION_WPAD 252
/* Internal values */
#define DHCP_OPTION_IP_ADDRESS 1024
#define DHCP_OPTION_EXPIRY 1025
#define DHCP6_OPTION_IP_ADDRESS 1026
#define DHCP6_OPTION_PREFIXLEN 1027
#define DHCP6_OPTION_PREFERRED_LIFE 1028
#define DHCP6_OPTION_MAX_LIFE 1029
#define DHCP6_OPTION_STARTS 1030
#define DHCP6_OPTION_LIFE_STARTS 1031
#define DHCP6_OPTION_RENEW 1032
#define DHCP6_OPTION_REBIND 1033
#define DHCP6_OPTION_IAID 1034
typedef struct {
guint num;
const char *name;
gboolean include;
} ReqOption;
#define REQPREFIX "requested_"
static const ReqOption dhcp4_requests[] = {
{ SD_DHCP_OPTION_SUBNET_MASK, REQPREFIX "subnet_mask", TRUE },
{ SD_DHCP_OPTION_TIME_OFFSET, REQPREFIX "time_offset", TRUE },
{ SD_DHCP_OPTION_ROUTER, REQPREFIX "routers", TRUE },
{ SD_DHCP_OPTION_DOMAIN_NAME_SERVER, REQPREFIX "domain_name_servers", TRUE },
{ SD_DHCP_OPTION_HOST_NAME, REQPREFIX "host_name", TRUE },
{ SD_DHCP_OPTION_DOMAIN_NAME, REQPREFIX "domain_name", TRUE },
{ SD_DHCP_OPTION_INTERFACE_MTU, REQPREFIX "interface_mtu", TRUE },
{ SD_DHCP_OPTION_BROADCAST, REQPREFIX "broadcast_address", TRUE },
{ SD_DHCP_OPTION_STATIC_ROUTE, REQPREFIX "static_routes", TRUE },
{ DHCP_OPTION_NIS_DOMAIN, REQPREFIX "nis_domain", TRUE },
{ DHCP_OPTION_NIS_SERVERS, REQPREFIX "nis_servers", TRUE },
{ SD_DHCP_OPTION_NTP_SERVER, REQPREFIX "ntp_servers", TRUE },
{ SD_DHCP_OPTION_SERVER_IDENTIFIER, REQPREFIX "dhcp_server_identifier", TRUE },
{ DHCP_OPTION_DOMAIN_SEARCH, REQPREFIX "domain_search", TRUE },
{ SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE, REQPREFIX "rfc3442_classless_static_routes", TRUE },
{ DHCP_OPTION_MS_ROUTES, REQPREFIX "ms_classless_static_routes", TRUE },
{ DHCP_OPTION_WPAD, REQPREFIX "wpad", TRUE },
/* Internal values */
{ SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME, REQPREFIX "expiry", FALSE },
{ SD_DHCP_OPTION_CLIENT_IDENTIFIER, REQPREFIX "dhcp_client_identifier", FALSE },
{ DHCP_OPTION_IP_ADDRESS, REQPREFIX "ip_address", FALSE },
{ 0, NULL, FALSE }
};
static const ReqOption dhcp6_requests[] = {
{ SD_DHCP6_OPTION_CLIENTID, REQPREFIX "dhcp6_client_id", TRUE },
/* Don't request server ID by default; some servers don't reply to
* Information Requests that request the Server ID.
*/
{ SD_DHCP6_OPTION_SERVERID, REQPREFIX "dhcp6_server_id", FALSE },
{ SD_DHCP6_OPTION_DNS_SERVERS, REQPREFIX "dhcp6_name_servers", TRUE },
{ SD_DHCP6_OPTION_DOMAIN_LIST, REQPREFIX "dhcp6_domain_search", TRUE },
{ SD_DHCP6_OPTION_SNTP_SERVERS, REQPREFIX "dhcp6_sntp_servers", TRUE },
/* Internal values */
{ DHCP6_OPTION_IP_ADDRESS, REQPREFIX "ip6_address", FALSE },
{ DHCP6_OPTION_PREFIXLEN, REQPREFIX "ip6_prefixlen", FALSE },
{ DHCP6_OPTION_PREFERRED_LIFE, REQPREFIX "preferred_life", FALSE },
{ DHCP6_OPTION_MAX_LIFE, REQPREFIX "max_life", FALSE },
{ DHCP6_OPTION_STARTS, REQPREFIX "starts", FALSE },
{ DHCP6_OPTION_LIFE_STARTS, REQPREFIX "life_starts", FALSE },
{ DHCP6_OPTION_RENEW, REQPREFIX "renew", FALSE },
{ DHCP6_OPTION_REBIND, REQPREFIX "rebind", FALSE },
{ DHCP6_OPTION_IAID, REQPREFIX "iaid", FALSE },
{ 0, NULL, FALSE }
};
static void
take_option (GHashTable *options,
const ReqOption *requests,
guint option,
char *value)
{
guint i;
g_return_if_fail (value != NULL);
for (i = 0; requests[i].name; i++) {
if (requests[i].num == option) {
g_hash_table_insert (options,
(gpointer) (requests[i].name + NM_STRLEN (REQPREFIX)),
value);
break;
}
}
/* Option should always be found */
g_assert (requests[i].name);
}
static void
add_option (GHashTable *options, const ReqOption *requests, guint option, const char *value)
{
if (options)
take_option (options, requests, option, g_strdup (value));
}
static void
add_option_u32 (GHashTable *options, const ReqOption *requests, guint option, guint32 value)
{
if (options)
take_option (options, requests, option, g_strdup_printf ("%u", value));
}
static void
add_option_u64 (GHashTable *options, const ReqOption *requests, guint option, guint64 value)
{
if (options)
take_option (options, requests, option, g_strdup_printf ("%" G_GUINT64_FORMAT, value));
}
static void
add_requests_to_options (GHashTable *options, const ReqOption *requests)
{
guint i;
for (i = 0; options && requests[i].name; i++) {
if (requests[i].include)
g_hash_table_insert (options, (gpointer) requests[i].name, g_strdup ("1"));
}
}
#define LOG_LEASE(domain, ...) \
G_STMT_START { \
if (log_lease) { \
nm_log (LOGL_INFO, (domain), __VA_ARGS__); \
} \
} G_STMT_END
static NMIP4Config *
lease_to_ip4_config (const char *iface,
int ifindex,
sd_dhcp_lease *lease,
GHashTable *options,
guint32 default_priority,
gboolean log_lease,
GError **error)
{
NMIP4Config *ip4_config = NULL;
struct in_addr tmp_addr;
const struct in_addr *addr_list;
char buf[INET_ADDRSTRLEN];
const char *str;
guint32 lifetime = 0, i;
NMPlatformIP4Address address;
GString *l;
gs_free sd_dhcp_route **routes = NULL;
guint16 mtu;
int r, num;
guint64 end_time;
const void *data;
gsize data_len;
gboolean metered = FALSE;
gboolean static_default_gateway = FALSE;
g_return_val_if_fail (lease != NULL, NULL);
ip4_config = nm_ip4_config_new (ifindex);
/* Address */
sd_dhcp_lease_get_address (lease, &tmp_addr);
memset (&address, 0, sizeof (address));
address.address = tmp_addr.s_addr;
address.peer_address = tmp_addr.s_addr;
str = nm_utils_inet4_ntop (tmp_addr.s_addr, NULL);
LOG_LEASE (LOGD_DHCP4, " address %s", str);
add_option (options, dhcp4_requests, DHCP_OPTION_IP_ADDRESS, str);
/* Prefix/netmask */
sd_dhcp_lease_get_netmask (lease, &tmp_addr);
address.plen = nm_utils_ip4_netmask_to_prefix (tmp_addr.s_addr);
LOG_LEASE (LOGD_DHCP4, " plen %d", address.plen);
add_option (options,
dhcp4_requests,
SD_DHCP_OPTION_SUBNET_MASK,
nm_utils_inet4_ntop (tmp_addr.s_addr, NULL));
/* Lease time */
sd_dhcp_lease_get_lifetime (lease, &lifetime);
address.timestamp = nm_utils_get_monotonic_timestamp_s ();
address.lifetime = address.preferred = lifetime;
end_time = (guint64) time (NULL) + lifetime;
LOG_LEASE (LOGD_DHCP4, " expires in %" G_GUINT32_FORMAT " seconds", lifetime);
add_option_u64 (options,
dhcp4_requests,
SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME,
end_time);
address.addr_source = NM_IP_CONFIG_SOURCE_DHCP;
nm_ip4_config_add_address (ip4_config, &address);
/* DNS Servers */
num = sd_dhcp_lease_get_dns (lease, &addr_list);
if (num > 0) {
l = g_string_sized_new (30);
for (i = 0; i < num; i++) {
if (addr_list[i].s_addr) {
nm_ip4_config_add_nameserver (ip4_config, addr_list[i].s_addr);
str = nm_utils_inet4_ntop (addr_list[i].s_addr, NULL);
LOG_LEASE (LOGD_DHCP4, " nameserver '%s'", str);
g_string_append_printf (l, "%s%s", l->len ? " " : "", str);
}
}
if (l->len)
add_option (options, dhcp4_requests, SD_DHCP_OPTION_DOMAIN_NAME_SERVER, l->str);
g_string_free (l, TRUE);
}
/* Domain Name */
r = sd_dhcp_lease_get_domainname (lease, &str);
if (r == 0) {
/* Multiple domains sometimes stuffed into option 15 "Domain Name".
* As systemd escapes such characters, split them at \\032. */
char **domains = g_strsplit (str, "\\032", 0);
char **s;
for (s = domains; *s; s++) {
LOG_LEASE (LOGD_DHCP4, " domain name '%s'", *s);
nm_ip4_config_add_domain (ip4_config, *s);
}
g_strfreev (domains);
add_option (options, dhcp4_requests, SD_DHCP_OPTION_DOMAIN_NAME, str);
}
/* Hostname */
r = sd_dhcp_lease_get_hostname (lease, &str);
if (r == 0) {
LOG_LEASE (LOGD_DHCP4, " hostname '%s'", str);
add_option (options, dhcp4_requests, SD_DHCP_OPTION_HOST_NAME, str);
}
/* Routes */
num = sd_dhcp_lease_get_routes (lease, &routes);
if (num > 0) {
l = g_string_sized_new (30);
for (i = 0; i < num; i++) {
NMPlatformIP4Route route = { 0 };
const char *gw_str;
guint8 plen;
struct in_addr a;
if (sd_dhcp_route_get_destination (routes[i], &a) < 0)
continue;
route.network = a.s_addr;
if ( sd_dhcp_route_get_destination_prefix_length (routes[i], &plen) < 0
|| plen > 32)
continue;
route.plen = plen;
if (sd_dhcp_route_get_gateway (routes[i], &a) < 0)
continue;
route.gateway = a.s_addr;
if (route.plen) {
route.rt_source = NM_IP_CONFIG_SOURCE_DHCP;
route.metric = default_priority;
nm_ip4_config_add_route (ip4_config, &route);
str = nm_utils_inet4_ntop (route.network, buf);
gw_str = nm_utils_inet4_ntop (route.gateway, NULL);
LOG_LEASE (LOGD_DHCP4, " static route %s/%d gw %s", str, route.plen, gw_str);
g_string_append_printf (l, "%s%s/%d %s", l->len ? " " : "", str, route.plen, gw_str);
} else {
if (!static_default_gateway) {
static_default_gateway = TRUE;
nm_ip4_config_set_gateway (ip4_config, route.gateway);
str = nm_utils_inet4_ntop (route.gateway, NULL);
LOG_LEASE (LOGD_DHCP4, " gateway %s", str);
add_option (options, dhcp4_requests, SD_DHCP_OPTION_ROUTER, str);
}
}
}
if (l->len)
add_option (options, dhcp4_requests, SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE, l->str);
g_string_free (l, TRUE);
}
/* If the DHCP server returns both a Classless Static Routes option and a
* Router option, the DHCP client MUST ignore the Router option [RFC 3442].
* Be more lenient and ignore the Router option only if Classless Static
* Routes contain a default gateway (as other DHCP backends do).
*/
/* Gateway */
if (!static_default_gateway) {
r = sd_dhcp_lease_get_router (lease, &tmp_addr);
if (r == 0) {
nm_ip4_config_set_gateway (ip4_config, tmp_addr.s_addr);
str = nm_utils_inet4_ntop (tmp_addr.s_addr, NULL);
LOG_LEASE (LOGD_DHCP4, " gateway %s", str);
add_option (options, dhcp4_requests, SD_DHCP_OPTION_ROUTER, str);
}
}
/* MTU */
r = sd_dhcp_lease_get_mtu (lease, &mtu);
if (r == 0 && mtu) {
nm_ip4_config_set_mtu (ip4_config, mtu, NM_IP_CONFIG_SOURCE_DHCP);
add_option_u32 (options, dhcp4_requests, SD_DHCP_OPTION_INTERFACE_MTU, mtu);
LOG_LEASE (LOGD_DHCP4, " mtu %u", mtu);
}
/* NTP servers */
num = sd_dhcp_lease_get_ntp (lease, &addr_list);
if (num > 0) {
l = g_string_sized_new (30);
for (i = 0; i < num; i++) {
str = nm_utils_inet4_ntop (addr_list[i].s_addr, buf);
LOG_LEASE (LOGD_DHCP4, " ntp server '%s'", str);
g_string_append_printf (l, "%s%s", l->len ? " " : "", str);
}
add_option (options, dhcp4_requests, SD_DHCP_OPTION_NTP_SERVER, l->str);
g_string_free (l, TRUE);
}
r = sd_dhcp_lease_get_vendor_specific (lease, &data, &data_len);
if (r >= 0)
metered = !!memmem (data, data_len, "ANDROID_METERED", NM_STRLEN ("ANDROID_METERED"));
nm_ip4_config_set_metered (ip4_config, metered);
return ip4_config;
}
/************************************************************/
static char *
get_leasefile_path (const char *iface, const char *uuid, gboolean ipv6)
{
return g_strdup_printf (NMSTATEDIR "/internal%s-%s-%s.lease",
ipv6 ? "6" : "",
uuid,
iface);
}
static GSList *
nm_dhcp_systemd_get_lease_ip_configs (const char *iface,
int ifindex,
const char *uuid,
gboolean ipv6,
guint32 default_route_metric)
{
GSList *leases = NULL;
gs_free char *path = NULL;
sd_dhcp_lease *lease = NULL;
NMIP4Config *ip4_config;
int r;
if (ipv6)
return NULL;
path = get_leasefile_path (iface, uuid, FALSE);
r = dhcp_lease_load (&lease, path);
if (r == 0 && lease) {
ip4_config = lease_to_ip4_config (iface, ifindex, lease, NULL, default_route_metric, FALSE, NULL);
if (ip4_config)
leases = g_slist_append (leases, ip4_config);
sd_dhcp_lease_unref (lease);
}
return leases;
}
/************************************************************/
static void
_save_client_id (NMDhcpSystemd *self,
uint8_t type,
const uint8_t *client_id,
size_t len)
{
gs_unref_bytes GBytes *b = NULL;
gs_free char *buf = NULL;
g_return_if_fail (self != NULL);
g_return_if_fail (client_id != NULL);
g_return_if_fail (len > 0);
if (!nm_dhcp_client_get_client_id (NM_DHCP_CLIENT (self))) {
buf = g_malloc (len + 1);
buf[0] = type;
memcpy (buf + 1, client_id, len);
b = g_bytes_new (buf, len + 1);
nm_dhcp_client_set_client_id (NM_DHCP_CLIENT (self), b);
}
}
static void
bound4_handle (NMDhcpSystemd *self)
{
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
const char *iface = nm_dhcp_client_get_iface (NM_DHCP_CLIENT (self));
sd_dhcp_lease *lease;
NMIP4Config *ip4_config;
GHashTable *options;
GError *error = NULL;
int r;
r = sd_dhcp_client_get_lease (priv->client4, &lease);
if (r < 0 || !lease) {
_LOGW ("no lease!");
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL);
return;
}
_LOGD ("lease available");
options = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, g_free);
ip4_config = lease_to_ip4_config (iface,
nm_dhcp_client_get_ifindex (NM_DHCP_CLIENT (self)),
lease,
options,
nm_dhcp_client_get_priority (NM_DHCP_CLIENT (self)),
TRUE,
&error);
if (ip4_config) {
const uint8_t *client_id = NULL;
size_t client_id_len = 0;
uint8_t type = 0;
add_requests_to_options (options, dhcp4_requests);
dhcp_lease_save (lease, priv->lease_file);
sd_dhcp_client_get_client_id(priv->client4, &type, &client_id, &client_id_len);
if (client_id)
_save_client_id (self, type, client_id, client_id_len);
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self),
NM_DHCP_STATE_BOUND,
G_OBJECT (ip4_config),
options);
} else {
_LOGW ("%s", error->message);
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL);
g_clear_error (&error);
}
g_hash_table_destroy (options);
g_clear_object (&ip4_config);
}
static void
dhcp_event_cb (sd_dhcp_client *client, int event, gpointer user_data)
{
NMDhcpSystemd *self = NM_DHCP_SYSTEMD (user_data);
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
g_assert (priv->client4 == client);
_LOGD ("client event %d", event);
switch (event) {
case SD_DHCP_CLIENT_EVENT_EXPIRED:
nm_dhcp_client_set_state (NM_DHCP_CLIENT (user_data), NM_DHCP_STATE_EXPIRE, NULL, NULL);
break;
case SD_DHCP_CLIENT_EVENT_STOP:
nm_dhcp_client_set_state (NM_DHCP_CLIENT (user_data), NM_DHCP_STATE_FAIL, NULL, NULL);
break;
case SD_DHCP_CLIENT_EVENT_RENEW:
case SD_DHCP_CLIENT_EVENT_IP_CHANGE:
case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE:
bound4_handle (self);
break;
default:
_LOGW ("unhandled DHCP event %d", event);
break;
}
}
static guint16
get_arp_type (const GByteArray *hwaddr)
{
if (hwaddr->len == ETH_ALEN)
return ARPHRD_ETHER;
else if (hwaddr->len == INFINIBAND_ALEN)
return ARPHRD_INFINIBAND;
else
return ARPHRD_NONE;
}
static gboolean
ip4_start (NMDhcpClient *client, const char *dhcp_anycast_addr, const char *last_ip4_address)
{
NMDhcpSystemd *self = NM_DHCP_SYSTEMD (client);
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
const char *iface = nm_dhcp_client_get_iface (client);
const GByteArray *hwaddr;
sd_dhcp_lease *lease = NULL;
GBytes *override_client_id;
const uint8_t *client_id = NULL;
size_t client_id_len = 0;
struct in_addr last_addr = { 0 };
const char *hostname, *fqdn;
int r, i;
gboolean success = FALSE;
guint16 arp_type;
g_assert (priv->client4 == NULL);
g_assert (priv->client6 == NULL);
g_free (priv->lease_file);
priv->lease_file = get_leasefile_path (iface, nm_dhcp_client_get_uuid (client), FALSE);
r = sd_dhcp_client_new (&priv->client4);
if (r < 0) {
_LOGW ("failed to create client (%d)", r);
return FALSE;
}
_LOGT ("dhcp-client4: set %p", priv->client4);
r = sd_dhcp_client_attach_event (priv->client4, NULL, 0);
if (r < 0) {
_LOGW ("failed to attach event (%d)", r);
goto error;
}
hwaddr = nm_dhcp_client_get_hw_addr (client);
if (hwaddr) {
arp_type= get_arp_type (hwaddr);
if (arp_type == ARPHRD_NONE) {
_LOGW ("failed to determine ARP type");
goto error;
}
r = sd_dhcp_client_set_mac (priv->client4,
hwaddr->data,
hwaddr->len,
arp_type);
if (r < 0) {
_LOGW ("failed to set MAC address (%d)", r);
goto error;
}
}
r = sd_dhcp_client_set_index (priv->client4, nm_dhcp_client_get_ifindex (client));
if (r < 0) {
_LOGW ("failed to set ifindex (%d)", r);
goto error;
}
r = sd_dhcp_client_set_callback (priv->client4, dhcp_event_cb, client);
if (r < 0) {
_LOGW ("failed to set callback (%d)", r);
goto error;
}
r = sd_dhcp_client_set_request_broadcast (priv->client4, true);
if (r < 0) {
_LOGW ("failed to enable broadcast mode (%d)", r);
goto error;
}
dhcp_lease_load (&lease, priv->lease_file);
if (last_ip4_address)
inet_pton (AF_INET, last_ip4_address, &last_addr);
else if (lease)
sd_dhcp_lease_get_address (lease, &last_addr);
if (last_addr.s_addr) {
r = sd_dhcp_client_set_request_address (priv->client4, &last_addr);
if (r < 0) {
_LOGW ("failed to set last IPv4 address (%d)", r);
goto error;
}
}
override_client_id = nm_dhcp_client_get_client_id (client);
if (override_client_id) {
client_id = g_bytes_get_data (override_client_id, &client_id_len);
g_assert (client_id && client_id_len);
sd_dhcp_client_set_client_id (priv->client4,
client_id[0],
client_id + 1,
client_id_len - 1);
} else if (lease) {
r = sd_dhcp_lease_get_client_id (lease, (const void **) &client_id, &client_id_len);
if (r == 0 && client_id_len) {
sd_dhcp_client_set_client_id (priv->client4,
client_id[0],
client_id + 1,
client_id_len - 1);
_save_client_id (NM_DHCP_SYSTEMD (client),
client_id[0],
client_id + 1,
client_id_len - 1);
}
}
/* Add requested options */
for (i = 0; dhcp4_requests[i].name; i++) {
if (dhcp4_requests[i].include)
sd_dhcp_client_set_request_option (priv->client4, dhcp4_requests[i].num);
}
hostname = nm_dhcp_client_get_hostname (client);
if (hostname) {
char *prefix, *dot;
prefix = strdup (hostname);
dot = strchr (prefix, '.');
/* get rid of the domain */
if (dot)
*dot = '\0';
r = sd_dhcp_client_set_hostname (priv->client4, prefix);
free (prefix);
if (r < 0) {
_LOGW ("failed to set DHCP hostname (%d)", r);
goto error;
}
}
fqdn = nm_dhcp_client_get_fqdn (client);
if (fqdn) {
r = sd_dhcp_client_set_hostname (priv->client4, fqdn);
if (r < 0) {
_LOGW ("failed to set DHCP FQDN (%d)", r);
goto error;
}
}
r = sd_dhcp_client_start (priv->client4);
if (r < 0) {
_LOGW ("failed to start client (%d)", r);
goto error;
}
nm_dhcp_client_start_timeout (client);
success = TRUE;
error:
sd_dhcp_lease_unref (lease);
if (!success)
priv->client4 = sd_dhcp_client_unref (priv->client4);
return success;
}
static NMIP6Config *
lease_to_ip6_config (const char *iface,
int ifindex,
sd_dhcp6_lease *lease,
GHashTable *options,
gboolean log_lease,
gboolean info_only,
GError **error)
{
struct in6_addr tmp_addr, *dns;
uint32_t lft_pref, lft_valid;
NMIP6Config *ip6_config;
const char *addr_str;
char **domains;
GString *str;
int num, i;
gint32 ts;
g_return_val_if_fail (lease, NULL);
ip6_config = nm_ip6_config_new (ifindex);
ts = nm_utils_get_monotonic_timestamp_s ();
str = g_string_sized_new (30);
/* Addresses */
sd_dhcp6_lease_reset_address_iter (lease);
while (sd_dhcp6_lease_get_address (lease, &tmp_addr, &lft_pref, &lft_valid) >= 0) {
NMPlatformIP6Address address = {
.plen = 128,
.address = tmp_addr,
.timestamp = ts,
.lifetime = lft_valid,
.preferred = lft_pref,
.addr_source = NM_IP_CONFIG_SOURCE_DHCP,
};
nm_ip6_config_add_address (ip6_config, &address);
addr_str = nm_utils_inet6_ntop (&tmp_addr, NULL);
g_string_append_printf (str, "%s%s", str->len ? " " : "", addr_str);
LOG_LEASE (LOGD_DHCP6,
" address %s",
nm_platform_ip6_address_to_string (&address, NULL, 0));
};
if (str->len) {
add_option (options, dhcp6_requests, DHCP6_OPTION_IP_ADDRESS, str->str);
g_string_set_size (str , 0);
}
if (!info_only && nm_ip6_config_get_num_addresses (ip6_config) == 0) {
g_string_free (str, TRUE);
g_object_unref (ip6_config);
g_set_error_literal (error,
NM_MANAGER_ERROR,
NM_MANAGER_ERROR_FAILED,
"no address received in managed mode");
return NULL;
}
/* DNS servers */
num = sd_dhcp6_lease_get_dns (lease, &dns);
if (num > 0) {
for (i = 0; i < num; i++) {
nm_ip6_config_add_nameserver (ip6_config, &dns[i]);
addr_str = nm_utils_inet6_ntop (&dns[i], NULL);
g_string_append_printf (str, "%s%s", str->len ? " " : "", addr_str);
LOG_LEASE (LOGD_DHCP6, " nameserver %s", addr_str);
}
add_option (options, dhcp6_requests, SD_DHCP6_OPTION_DNS_SERVERS, str->str);
g_string_set_size (str, 0);
}
/* Search domains */
num = sd_dhcp6_lease_get_domains (lease, &domains);
if (num > 0) {
for (i = 0; i < num; i++) {
nm_ip6_config_add_search (ip6_config, domains[i]);
g_string_append_printf (str, "%s%s", str->len ? " " : "", domains[i]);
LOG_LEASE (LOGD_DHCP6, " domain name '%s'", domains[i]);
}
add_option (options, dhcp6_requests, SD_DHCP6_OPTION_DOMAIN_LIST, str->str);
g_string_set_size (str, 0);
}
g_string_free (str, TRUE);
return ip6_config;
}
static void
bound6_handle (NMDhcpSystemd *self)
{
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
const char *iface = nm_dhcp_client_get_iface (NM_DHCP_CLIENT (self));
gs_unref_object NMIP6Config *ip6_config = NULL;
gs_unref_hashtable GHashTable *options = NULL;
gs_free_error GError *error = NULL;
sd_dhcp6_lease *lease;
int r;
r = sd_dhcp6_client_get_lease (priv->client6, &lease);
if (r < 0 || !lease) {
_LOGW (" no lease!");
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL);
return;
}
_LOGD ("lease available");
options = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, g_free);
ip6_config = lease_to_ip6_config (iface,
nm_dhcp_client_get_ifindex (NM_DHCP_CLIENT (self)),
lease,
options,
TRUE,
priv->info_only,
&error);
if (ip6_config) {
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self),
NM_DHCP_STATE_BOUND,
G_OBJECT (ip6_config),
options);
} else {
_LOGW ("%s", error->message);
nm_dhcp_client_set_state (NM_DHCP_CLIENT (self), NM_DHCP_STATE_FAIL, NULL, NULL);
}
}
static void
dhcp6_event_cb (sd_dhcp6_client *client, int event, gpointer user_data)
{
NMDhcpSystemd *self = NM_DHCP_SYSTEMD (user_data);
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
g_assert (priv->client6 == client);
_LOGD ("client event %d", event);
switch (event) {
case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX:
nm_dhcp_client_set_state (NM_DHCP_CLIENT (user_data), NM_DHCP_STATE_TIMEOUT, NULL, NULL);
break;
case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE:
case SD_DHCP6_CLIENT_EVENT_STOP:
nm_dhcp_client_set_state (NM_DHCP_CLIENT (user_data), NM_DHCP_STATE_FAIL, NULL, NULL);
break;
case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST:
bound6_handle (self);
break;
default:
_LOGW ("unhandled event %d", event);
break;
}
}
static gboolean
ip6_start (NMDhcpClient *client,
const char *dhcp_anycast_addr,
const struct in6_addr *ll_addr,
gboolean info_only,
NMSettingIP6ConfigPrivacy privacy,
const GByteArray *duid)
{
NMDhcpSystemd *self = NM_DHCP_SYSTEMD (client);
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
const char *iface = nm_dhcp_client_get_iface (client);
const GByteArray *hwaddr;
int r, i;
g_assert (priv->client4 == NULL);
g_assert (priv->client6 == NULL);
g_return_val_if_fail (duid != NULL, FALSE);
g_free (priv->lease_file);
priv->lease_file = get_leasefile_path (iface, nm_dhcp_client_get_uuid (client), TRUE);
priv->info_only = info_only;
r = sd_dhcp6_client_new (&priv->client6);
if (r < 0) {
_LOGW ("failed to create client (%d)", r);
return FALSE;
}
_LOGT ("dhcp-client6: set %p", priv->client4);
if (info_only)
sd_dhcp6_client_set_information_request (priv->client6, 1);
/* NM stores the entire DUID which includes the uint16 "type", while systemd
* wants the type passed separately from the following data.
*/
r = sd_dhcp6_client_set_duid (priv->client6,
ntohs (((const guint16 *) duid->data)[0]),
duid->data + 2,
duid->len - 2);
if (r < 0) {
_LOGW ("failed to set DUID (%d)", r);
return FALSE;
}
r = sd_dhcp6_client_attach_event (priv->client6, NULL, 0);
if (r < 0) {
_LOGW ("failed to attach event (%d)", r);
goto error;
}
hwaddr = nm_dhcp_client_get_hw_addr (client);
if (hwaddr) {
r = sd_dhcp6_client_set_mac (priv->client6,
hwaddr->data,
hwaddr->len,
get_arp_type (hwaddr));
if (r < 0) {
_LOGW ("failed to set MAC address (%d)", r);
goto error;
}
}
r = sd_dhcp6_client_set_index (priv->client6, nm_dhcp_client_get_ifindex (client));
if (r < 0) {
_LOGW ("failed to set ifindex (%d)", r);
goto error;
}
r = sd_dhcp6_client_set_callback (priv->client6, dhcp6_event_cb, client);
if (r < 0) {
_LOGW ("failed to set callback (%d)", r);
goto error;
}
/* Add requested options */
for (i = 0; dhcp6_requests[i].name; i++) {
if (dhcp6_requests[i].include)
sd_dhcp6_client_set_request_option (priv->client6, dhcp6_requests[i].num);
}
r = sd_dhcp6_client_set_local_address (priv->client6, ll_addr);
if (r < 0) {
_LOGW ("failed to set local address (%d)", r);
goto error;
}
r = sd_dhcp6_client_start (priv->client6);
if (r < 0) {
_LOGW ("failed to start client (%d)", r);
goto error;
}
return TRUE;
error:
sd_dhcp6_client_unref (priv->client6);
priv->client6 = NULL;
return FALSE;
}
static void
stop (NMDhcpClient *client, gboolean release, const GByteArray *duid)
{
NMDhcpSystemd *self = NM_DHCP_SYSTEMD (client);
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (self);
int r = 0;
_LOGT ("dhcp-client%d: stop %p",
priv->client4 ? '4' : '6',
priv->client4 ? (gpointer) priv->client4 : (gpointer) priv->client6);
if (priv->client4) {
sd_dhcp_client_set_callback (priv->client4, NULL, NULL);
r = sd_dhcp_client_stop (priv->client4);
} else if (priv->client6) {
sd_dhcp6_client_set_callback (priv->client6, NULL, NULL);
r = sd_dhcp6_client_stop (priv->client6);
}
if (r)
_LOGW ("failed to stop client (%d)", r);
}
/***************************************************/
static void
nm_dhcp_systemd_init (NMDhcpSystemd *self)
{
}
static void
dispose (GObject *object)
{
NMDhcpSystemdPrivate *priv = NM_DHCP_SYSTEMD_GET_PRIVATE (object);
g_clear_pointer (&priv->lease_file, g_free);
if (priv->client4) {
sd_dhcp_client_stop (priv->client4);
sd_dhcp_client_unref (priv->client4);
priv->client4 = NULL;
}
if (priv->client6) {
sd_dhcp6_client_stop (priv->client6);
sd_dhcp6_client_unref (priv->client6);
priv->client6 = NULL;
}
G_OBJECT_CLASS (nm_dhcp_systemd_parent_class)->dispose (object);
}
static void
nm_dhcp_systemd_class_init (NMDhcpSystemdClass *sdhcp_class)
{
NMDhcpClientClass *client_class = NM_DHCP_CLIENT_CLASS (sdhcp_class);
GObjectClass *object_class = G_OBJECT_CLASS (sdhcp_class);
g_type_class_add_private (sdhcp_class, sizeof (NMDhcpSystemdPrivate));
/* virtual methods */
object_class->dispose = dispose;
client_class->ip4_start = ip4_start;
client_class->ip6_start = ip6_start;
client_class->stop = stop;
}
static void __attribute__((constructor))
register_dhcp_dhclient (void)
{
nm_g_type_init ();
_nm_dhcp_client_register (NM_TYPE_DHCP_SYSTEMD,
"internal",
NULL,
nm_dhcp_systemd_get_lease_ip_configs);
}
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