X-Git-Url: https://git.openssl.org/?a=blobdiff_plain;f=ssl%2Fdtls1.h;h=96f733434a9bbf3007b56af3da7b3ba6b166f4af;hb=77ff1f3b8bfaa348956c5096a2b829f2e767b4f1;hp=715749ae2719df401d7c33071aa5fd0304b2edad;hpb=c3b344e36a088283731b4f65a70e85b100f55686;p=openssl.git

diff --git a/ssl/dtls1.h b/ssl/dtls1.h
index 715749ae27..96f733434a 100644
--- a/ssl/dtls1.h
+++ b/ssl/dtls1.h
@@ -84,8 +84,13 @@ extern "C" {
 #endif
 
 #define DTLS1_VERSION			0xFEFF
-#define DTLS1_BAD_VER			0x0100
 #define DTLS1_2_VERSION			0xFEFD
+#define DTLS_MAX_VERSION		DTLS1_2_VERSION
+
+#define DTLS1_BAD_VER			0x0100
+
+/* Special value for method supporting multiple versions */
+#define DTLS_ANY_VERSION		0x1FFFF
 
 #if 0
 /* this alert description is not specified anywhere... */
@@ -116,6 +121,9 @@ extern "C" {
 #define DTLS1_SCTP_AUTH_LABEL	"EXPORTER_DTLS_OVER_SCTP"
 #endif
 
+/* Max MTU overhead we know about so far is 40 for IPv6 + 8 for UDP */
+#define DTLS1_MAX_MTU_OVERHEAD                   48
+
 typedef struct dtls1_bitmap_st
 	{
 	unsigned long map;		/* track 32 packets on 32-bit systems
@@ -230,6 +238,7 @@ typedef struct dtls1_state_st
 	/* Is set when listening for new connections with dtls1_listen() */
 	unsigned int listen;
 
+	unsigned int link_mtu; /* max on-the-wire DTLS packet size */
 	unsigned int mtu; /* max DTLS packet size */
 
 	struct hm_header_st w_msg_hdr;
@@ -251,6 +260,10 @@ typedef struct dtls1_state_st
 	unsigned int handshake_fragment_len;
 
 	unsigned int retransmitting;
+	/*
+	 * Set when the handshake is ready to process peer's ChangeCipherSpec message.
+	 * Cleared after the message has been processed.
+	 */
 	unsigned int change_cipher_spec_ok;
 
 #ifndef OPENSSL_NO_SCTP
@@ -285,4 +298,3 @@ typedef struct dtls1_record_data_st
 }
 #endif
 #endif
-