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authorPatrik Flykt <patrik.flykt@linux.intel.com>2014-06-19 15:39:08 +0300
committerPatrik Flykt <patrik.flykt@linux.intel.com>2014-06-19 15:44:43 +0300
commitf12abb48fc510b8b349c05e35ba048134debaf25 (patch)
treeb272cc2b0174ec6790ca68721548b742921b12ca /src/libsystemd-network/sd-dhcp6-client.c
parentfc5414305d04799e0bdb6f8ca46ec70acd487f89 (diff)
sd-dhcp6-client: Add DHCPv6 IAID functionality
Create structures describing Identity Association IDentifiers and IPv6 lease addresses. [tomegun: initialize the IAID when client is started. Base this off of the predictable udev names, if available, as these satisfy the requirement of the IAID, and base it off the mac addres otherwise, as that is the best we have.]
Diffstat (limited to 'src/libsystemd-network/sd-dhcp6-client.c')
-rw-r--r--src/libsystemd-network/sd-dhcp6-client.c79
1 files changed, 77 insertions, 2 deletions
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 8718324c33..15d174beee 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -22,12 +22,17 @@
#include <errno.h>
#include <string.h>
+#include "udev.h"
+#include "udev-util.h"
+#include "virt.h"
#include "siphash24.h"
#include "util.h"
#include "refcnt.h"
+#include "network-internal.h"
#include "sd-dhcp6-client.h"
#include "dhcp6-protocol.h"
+#include "dhcp6-internal.h"
#define SYSTEMD_PEN 43793
#define HASH_KEY SD_ID128_MAKE(80,11,8c,c2,fe,4a,03,ee,3e,d6,0c,6f,36,39,14,09)
@@ -40,6 +45,7 @@ struct sd_dhcp6_client {
int event_priority;
int index;
struct ether_addr mac_addr;
+ DHCP6IA ia_na;
sd_dhcp6_client_cb_t cb;
void *userdata;
@@ -98,6 +104,11 @@ static int client_initialize(sd_dhcp6_client *client)
{
assert_return(client, -EINVAL);
+ client->ia_na.timeout_t1 =
+ sd_event_source_unref(client->ia_na.timeout_t1);
+ client->ia_na.timeout_t2 =
+ sd_event_source_unref(client->ia_na.timeout_t2);
+
client->state = DHCP6_STATE_STOPPED;
return 0;
@@ -113,6 +124,65 @@ static sd_dhcp6_client *client_stop(sd_dhcp6_client *client, int error) {
return client;
}
+static int client_ensure_iaid(sd_dhcp6_client *client) {
+ const char *name = NULL;
+ uint64_t id;
+
+ assert(client);
+
+ if (client->ia_na.id)
+ return 0;
+
+ if (detect_container(NULL) <= 0) {
+ /* not in a container, udev will be around */
+ _cleanup_udev_unref_ struct udev *udev;
+ _cleanup_udev_device_unref_ struct udev_device *device;
+ char ifindex_str[2 + DECIMAL_STR_MAX(int)];
+
+ udev = udev_new();
+ if (!udev)
+ return -ENOMEM;
+
+ sprintf(ifindex_str, "n%d", client->index);
+ device = udev_device_new_from_device_id(udev, ifindex_str);
+ if (!device)
+ return -errno;
+
+ if (udev_device_get_is_initialized(device) <= 0)
+ /* not yet ready */
+ return -EBUSY;
+
+ name = net_get_name(device);
+ }
+
+ if (name)
+ siphash24((uint8_t*)&id, name, strlen(name), HASH_KEY.bytes);
+ else
+ /* fall back to mac address if no predictable name available */
+ siphash24((uint8_t*)&id, &client->mac_addr, ETH_ALEN,
+ HASH_KEY.bytes);
+
+ /* fold into 32 bits */
+ client->ia_na.id = (id & 0xffffffff) ^ (id >> 32);
+
+ return 0;
+}
+
+static int client_start(sd_dhcp6_client *client)
+{
+ int r;
+
+ assert_return(client, -EINVAL);
+ assert_return(client->event, -EINVAL);
+ assert_return(client->index > 0, -EINVAL);
+
+ r = client_ensure_iaid(client);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
int sd_dhcp6_client_stop(sd_dhcp6_client *client)
{
client_stop(client, DHCP6_EVENT_STOP);
@@ -128,7 +198,11 @@ int sd_dhcp6_client_start(sd_dhcp6_client *client)
assert_return(client->event, -EINVAL);
assert_return(client->index > 0, -EINVAL);
- return r;
+ r = client_initialize(client);
+ if (r < 0)
+ return r;
+
+ return client_start(client);
}
int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event,
@@ -176,7 +250,6 @@ sd_dhcp6_client *sd_dhcp6_client_ref(sd_dhcp6_client *client) {
sd_dhcp6_client *sd_dhcp6_client_unref(sd_dhcp6_client *client) {
if (client && REFCNT_DEC(client->n_ref) <= 0) {
-
client_initialize(client);
sd_dhcp6_client_detach_event(client);
@@ -206,6 +279,8 @@ int sd_dhcp6_client_new(sd_dhcp6_client **ret)
client->n_ref = REFCNT_INIT;
+ client->ia_na.type = DHCP6_OPTION_IA_NA;
+
client->index = -1;
/* initialize DUID */