Merge "libnetutils: Expect 1's complement if computed UDP checksum is zero"

2013-12-12 22:19:05 +00:00 · 2013-12-12 22:19:05 +00:00 · 32212f2688
parent 260854c0b0 1c87ae05b3
commit 32212f2688
1 changed files with 2 additions and 0 deletions
--- a/libnetutils/packet.c
+++ b/libnetutils/packet.c
@ -230,6 +230,8 @@ int receive_packet(int s, struct dhcp_msg *msg)
    packet.udp.check = 0;
    sum = finish_sum(checksum(&packet, nread, 0));
    packet.udp.check = temp;
+    if (!sum)
+        sum = finish_sum(sum);
    if (temp != sum) {
        ALOGW("UDP header checksum failure (0x%x should be 0x%x)", sum, temp);
        return -1;