X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fnet.h;h=1765b1cd891a560c19677c2918b1e2140a361157;hb=373b0c12d9d0e8a3b449fd18be704e28dd6403e1;hp=b1792883382439c2961bb9e1be864f35efc0cd6b;hpb=b322126576c52ffbc9a91d818125fc461fa17d1b;p=tinc

diff --git a/src/net.h b/src/net.h
index b1792883..1765b1cd 100644
--- a/src/net.h
+++ b/src/net.h
@@ -36,6 +36,8 @@
 #define MTU 1518        /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
 #endif
 
+#define MINMTU 512      /* Below this we don't consider UDP to be working */
+
 /* MAXSIZE is the maximum size of an encapsulated packet: MTU + seqno + srcid + dstid + padding + HMAC + compressor overhead */
 #define MAXSIZE (MTU + 4 + sizeof(node_id_t) + sizeof(node_id_t) + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_SIZE + MTU/64 + 20)
 
@@ -213,7 +215,7 @@ extern void load_all_nodes(void);
 extern void try_tx(struct node_t *n, bool mtu);
 extern void tarpit(int fd);
 
-#ifndef HAVE_MINGW
+#ifndef HAVE_WINDOWS
 #define closesocket(s) close(s)
 #endif