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Dump.c Fix IPv6 checksum on big-endian.
authorSimon Kelley <simon@thekelleys.org.uk>
Sun, 30 Jan 2022 00:42:46 +0000 (00:42 +0000)
committerSimon Kelley <simon@thekelleys.org.uk>
Sun, 30 Jan 2022 00:42:46 +0000 (00:42 +0000)
src/dump.c patch | blob | history

diff --git a/src/dump.c b/src/dump.c
index 3d9ef1f..7b15945 100644 (file)
--- a/src/dump.c
+++ b/src/dump.c
@@ -147,8 +147,8 @@ void dump_packet(int mask, void *packet, size_t len,
       /* start UDP checksum */
       for (sum = 0, i = 0; i < IN6ADDRSZ; i+=2)
        {
-         sum += ip6.ip6_src.s6_addr[i] + (ip6.ip6_src.s6_addr[i+1] << 8) ;
-         sum += ip6.ip6_dst.s6_addr[i] + (ip6.ip6_dst.s6_addr[i+1] << 8) ;
+         sum += ntohs((ip6.ip6_src.s6_addr[i] << 8) + (ip6.ip6_src.s6_addr[i+1])) ;
+         sum += ntohs((ip6.ip6_dst.s6_addr[i] << 8) + (ip6.ip6_dst.s6_addr[i+1])) ; 
        }
     }
   else
@@ -207,7 +207,7 @@ void dump_packet(int mask, void *packet, size_t len,
       struct icmp6_hdr *icmp = packet;
       
       /* See comment in UDP code below. */
-      sum += htons(family == AF_INET6 ? IPPROTO_ICMPV6 : IPPROTO_ICMP);
+      sum += htons((family == AF_INET6) ? IPPROTO_ICMPV6 : IPPROTO_ICMP);
       sum += htons(len);
       
       icmp->icmp6_cksum = 0;
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