git: d6963b9ed328 - main - if_vxlan(4): Exclude ETHER_CRC_LEN from macro VXLAN_MAX_MTU

From: Zhenlei Huang <zlei_at_FreeBSD.org>
Date: Tue, 02 Jul 2024 04:58:16 UTC
The branch main has been updated by zlei:

URL: https://cgit.FreeBSD.org/src/commit/?id=d6963b9ed3287e91db3d1df153861591faff0007

commit d6963b9ed3287e91db3d1df153861591faff0007
Author:     Zhenlei Huang <zlei@FreeBSD.org>
AuthorDate: 2024-07-02 04:57:01 +0000
Commit:     Zhenlei Huang <zlei@FreeBSD.org>
CommitDate: 2024-07-02 04:57:01 +0000

    if_vxlan(4): Exclude ETHER_CRC_LEN from macro VXLAN_MAX_MTU
    
    The encapsulated (original) frame does not count in FCS as per Section 5
    of RFC 7348.
    
    Reviewed by:    afedorov, bryanv, #network
    Fixes:          b7592822d5de Allow set MTU more than 1500 bytes
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D45195
---
 sys/net/if_vxlan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/net/if_vxlan.c b/sys/net/if_vxlan.c
index 37f987981a0c..05430768cc73 100644
--- a/sys/net/if_vxlan.c
+++ b/sys/net/if_vxlan.c
@@ -97,7 +97,7 @@ struct vxlan_socket_mc_info {
 		60 /* Maximum IPv4 header len */ - \
 		sizeof(struct udphdr) - \
 		sizeof(struct vxlan_header) - \
-		ETHER_HDR_LEN - ETHER_CRC_LEN - ETHER_VLAN_ENCAP_LEN)
+		ETHER_HDR_LEN - ETHER_VLAN_ENCAP_LEN)
 #define VXLAN_BASIC_IFCAPS (IFCAP_LINKSTATE | IFCAP_JUMBO_MTU)
 
 #define VXLAN_SO_MC_MAX_GROUPS		32