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dhcp/systemd: ensure aligned memory access in ip6_start() for duid

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It probably was no problem in practice, because very likely the
chunk of memory was aligned already.

Also, drop non helpful comment and fix whitespace.
This commit is contained in:
Thomas Haller 2018-04-11 08:54:10 +02:00
parent 84cd6aea53
commit f7127db8cf
1 changed files with 5 additions and 8 deletions
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13
src/dhcp/nm-dhcp-systemd.c
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@ -29,6 +29,7 @@
#include <net/if_arp.h>
#include "nm-utils/nm-dedup-multi.h"
#include "nm-utils/unaligned.h"
#include "nm-utils.h"
#include "nm-dhcp-utils.h"
@ -878,14 +879,13 @@ ip6_start (NMDhcpClient *client,
GBytes *hwaddr;
const char *hostname;
int r, i;
const guint16 *duid_arr;
const guint8 *duid_arr;
gsize duid_len;
g_assert (priv->client4 == NULL);
g_assert (priv->client6 == NULL);
g_return_val_if_fail (duid != NULL, FALSE);
G_STATIC_ASSERT_EXPR (sizeof (duid_arr[0]) == 2);
duid_arr = g_bytes_get_data (duid, &duid_len);
if (!duid_arr || duid_len < 2)
g_return_val_if_reached (FALSE);
@ -907,14 +907,11 @@ ip6_start (NMDhcpClient *client,
_LOGT ("dhcp-client6: set %p", priv->client6);
if (nm_dhcp_client_get_info_only (client))
sd_dhcp6_client_set_information_request (priv->client6, 1);
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 (duid_arr[0]),
&duid_arr[1],
unaligned_read_be16 (&duid_arr[0]),
&duid_arr[2],
duid_len - 2);
if (r < 0) {
_LOGW ("failed to set DUID (%d)", r);