X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fethernet.h;h=cb9d5274e6dee0e29b2d7769f892aa61e92f67ac;hb=244002d83466a85ac4fbb5327e26a60fe44168fd;hp=4ef9dab935b64ab4306d8586b90f70347ed9c7de;hpb=cfc9fee931c70554353ce6c4acc3407baac08745;p=tinc

diff --git a/src/ethernet.h b/src/ethernet.h
index 4ef9dab9..cb9d5274 100644
--- a/src/ethernet.h
+++ b/src/ethernet.h
@@ -61,22 +61,23 @@
 #endif
 
 #ifndef HAVE_STRUCT_ETHER_HEADER
-struct ether_header {
+PACKED(struct ether_header {
 	uint8_t ether_dhost[ETH_ALEN];
 	uint8_t ether_shost[ETH_ALEN];
 	uint16_t ether_type;
-};
+});
 #endif
 
+STATIC_ASSERT(sizeof(struct ether_header) == 14, "ether_header has incorrect size");
+
 #ifndef HAVE_STRUCT_ARPHDR
-struct arphdr {
+PACKED(struct arphdr {
 	uint16_t ar_hrd;
 	uint16_t ar_pro;
 	uint8_t ar_hln;
 	uint8_t ar_pln;
 	uint16_t ar_op;
-};
-
+});
 #define ARPOP_REQUEST 1
 #define ARPOP_REPLY 2
 #define ARPOP_RREQUEST 3
@@ -86,14 +87,16 @@ struct arphdr {
 #define ARPOP_NAK 10
 #endif
 
+STATIC_ASSERT(sizeof(struct arphdr) == 8, "arphdr has incorrect size");
+
 #ifndef HAVE_STRUCT_ETHER_ARP
-struct  ether_arp {
+PACKED(struct ether_arp {
 	struct  arphdr ea_hdr;
 	uint8_t arp_sha[ETH_ALEN];
 	uint8_t arp_spa[4];
 	uint8_t arp_tha[ETH_ALEN];
 	uint8_t arp_tpa[4];
-};
+});
 #define arp_hrd ea_hdr.ar_hrd
 #define arp_pro ea_hdr.ar_pro
 #define arp_hln ea_hdr.ar_hln
@@ -101,4 +104,6 @@ struct  ether_arp {
 #define arp_op ea_hdr.ar_op
 #endif
 
+STATIC_ASSERT(sizeof(struct ether_arp) == 28, "ether_arp has incorrect size");
+
 #endif