fixed outer ip checksum in gtpu

Signed-off-by: Shlomo Yaakov <syaakov@cisco.com>
mshajude · Jun 15, 2021 · 380be9d · 380be9d
1 parent 127fb3a
commit 380be9d
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Showing 7 changed files with 2 additions and 0 deletions.
diff --git a/scripts/exp/tcp2_http_vlan_gtpu_c.pcap b/scripts/exp/tcp2_http_vlan_gtpu_c.pcap
diff --git a/scripts/exp/tcp2_http_vlan_gtpu_s.pcap b/scripts/exp/tcp2_http_vlan_gtpu_s.pcap
diff --git a/scripts/exp/tunnel_prepend.pcap b/scripts/exp/tunnel_prepend.pcap
diff --git a/scripts/exp/tunnel_prepend_ipv4_with_ipv6.pcap b/scripts/exp/tunnel_prepend_ipv4_with_ipv6.pcap
diff --git a/scripts/exp/tunnel_prepend_ipv4_with_vlan_ipv6.pcap b/scripts/exp/tunnel_prepend_ipv4_with_vlan_ipv6.pcap
diff --git a/scripts/exp/tunnel_prepend_with_vlan.pcap b/scripts/exp/tunnel_prepend_with_vlan.pcap
diff --git a/src/tunnels/gtp_man.cpp b/src/tunnels/gtp_man.cpp
@@ -289,6 +289,8 @@ int CGtpuMan::prepend_ipv4_tunnel(rte_mbuf * pkt, uint8_t l4_offset, uint16_t in
         /*Fix outer header IPv4 length */
         outer_ipv4->setTotalLength((uint16_t)(pkt->pkt_len - ETH_HDR_LEN));
     }
+    /*Fix ipv4 checksum*/
+    outer_ipv4->updateCheckSumFast();
     /*Fix UDP header length */
     UDPHeader* udp = (UDPHeader *)((uint8_t *)outer_ipv4 + IPV4_HDR_LEN);
     udp->setSourcePort(tch->getSourcePort());