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authorAlberto Gonzalez Iniesta <agi@inittab.org>2017-06-22 13:16:46 +0200
committerAlberto Gonzalez Iniesta <agi@inittab.org>2017-06-22 13:16:46 +0200
commit9683f890944ffb114f5f8214f694e0b339cf5a5a (patch)
treefa391f5f343554b2861b1f8722d0a2a627e1c1fc /src/openvpn/dhcp.c
parent3a2bbdb05ca6a6996e424c9fb225cb0d53804125 (diff)
New upstream version 2.4.3upstream/2.4.3
Diffstat (limited to 'src/openvpn/dhcp.c')
-rw-r--r--src/openvpn/dhcp.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/src/openvpn/dhcp.c b/src/openvpn/dhcp.c
index c17a22e..a2a5454 100644
--- a/src/openvpn/dhcp.c
+++ b/src/openvpn/dhcp.c
@@ -16,10 +16,9 @@
* 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 (see the file COPYING included with this
- * distribution); if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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.
*/
#ifdef HAVE_CONFIG_H
@@ -160,17 +159,20 @@ udp_checksum(const uint8_t *buf,
/* make 16 bit words out of every two adjacent 8 bit words and */
/* calculate the sum of all 16 bit words */
- for (i = 0; i < len_udp; i += 2) {
+ for (i = 0; i < len_udp; i += 2)
+ {
word16 = ((buf[i] << 8) & 0xFF00) + ((i + 1 < len_udp) ? (buf[i+1] & 0xFF) : 0);
sum += word16;
}
/* add the UDP pseudo header which contains the IP source and destination addresses */
- for (i = 0; i < 4; i += 2) {
+ for (i = 0; i < 4; i += 2)
+ {
word16 = ((src_addr[i] << 8) & 0xFF00) + (src_addr[i+1] & 0xFF);
sum += word16;
}
- for (i = 0; i < 4; i += 2) {
+ for (i = 0; i < 4; i += 2)
+ {
word16 = ((dest_addr[i] << 8) & 0xFF00) + (dest_addr[i+1] & 0xFF);
sum += word16;
}
@@ -180,7 +182,9 @@ udp_checksum(const uint8_t *buf,
/* keep only the last 16 bits of the 32 bit calculated sum and add the carries */
while (sum >> 16)
+ {
sum = (sum & 0xFFFF) + (sum >> 16);
+ }
/* Take the one's complement of sum */
return ((uint16_t) ~sum);