--- /dev/null
+From: Linus Lüssing <linus.luessing@c0d3.blue>
+Date: Sun, 13 Sep 2020 23:30:19 +0200
+Subject: batctl: tcpdump: Fix endianness in ICMPv6 Echo Request/Reply parsing
+
+The ICMPv6 Echo Request/Reply sequence number and id as well as the
+IPv6 header length are two byte long fields and therefore might need a
+conversion on a little endian system. Otherwise the output will be
+broken on such a machine.
+
+Fixes: 35b37756f4a3 ("add IPv6 support to tcpdump parser")
+Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+
+Origin: upstream, https://git.open-mesh.org/batctl.git/commit/e42f73d0d2a04edfbed1b9d0ad9fd57af9e90faf
+
+diff --git a/tcpdump.c b/tcpdump.c
+index 72c1869eb50d25c1f6b1e1fcae42199b9337cb4e..f3b1b8bd536e83e583bc535d01630843b80a558d 100644
+--- a/tcpdump.c
++++ b/tcpdump.c
+@@ -537,13 +537,15 @@ static void dump_ipv6(unsigned char *packet_buff, ssize_t buff_len,
+ break;
+ case ICMP6_ECHO_REQUEST:
+ printf(" echo request, id: %d, seq: %d, length: %hu\n",
+- icmphdr->icmp6_id, icmphdr->icmp6_seq,
+- iphdr->ip6_plen);
++ ntohs(icmphdr->icmp6_id),
++ ntohs(icmphdr->icmp6_seq),
++ ntohs(iphdr->ip6_plen));
+ break;
+ case ICMP6_ECHO_REPLY:
+ printf(" echo reply, id: %d, seq: %d, length: %hu\n",
+- icmphdr->icmp6_id, icmphdr->icmp6_seq,
+- iphdr->ip6_plen);
++ ntohs(icmphdr->icmp6_id),
++ ntohs(icmphdr->icmp6_seq),
++ ntohs(iphdr->ip6_plen));
+ break;
+ case ICMP6_TIME_EXCEEDED:
+ printf(" time exceeded in-transit, length %zu\n",