extern "C" {
#endif
-#define DTLS1_VERSION 0x0100
-#define DTLS1_VERSION_MAJOR 0x01
-#define DTLS1_VERSION_MINOR 0x00
+#define DTLS1_VERSION 0xFEFF
+#define DTLS1_BAD_VER 0x0100
+#if 0
+/* this alert description is not specified anywhere... */
#define DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 110
+#endif
/* lengths of messages */
#define DTLS1_COOKIE_LENGTH 32
#define DTLS1_HM_BAD_FRAGMENT -2
#define DTLS1_HM_FRAGMENT_RETRY -3
-#define DTLS1_CCS_HEADER_LENGTH 3
+#define DTLS1_CCS_HEADER_LENGTH 1
+#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
#define DTLS1_AL_HEADER_LENGTH 7
+#else
+#define DTLS1_AL_HEADER_LENGTH 2
+#endif
typedef struct dtls1_bitmap_st
PQ_64BIT max_seq_num; /* max record number seen so far */
} DTLS1_BITMAP;
+struct dtls1_retransmit_state
+ {
+ EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */
+ const EVP_MD *write_hash; /* used for mac generation */
+#ifndef OPENSSL_NO_COMP
+ COMP_CTX *compress; /* compression */
+#else
+ char *compress;
+#endif
+ SSL_SESSION *session;
+ unsigned short epoch;
+ };
+
struct hm_header_st
{
unsigned char type;
unsigned long frag_off;
unsigned long frag_len;
unsigned int is_ccs;
+ struct dtls1_retransmit_state saved_retransmit_state;
};
struct ccs_header_st
unsigned short handshake_read_seq;
+ /* save last sequence number for retransmissions */
+ unsigned char last_write_sequence[8];
+
/* Received handshake records (processed and unprocessed) */
record_pqueue unprocessed_rcds;
record_pqueue processed_rcds;
/* Buffered (sent) handshake records */
pqueue sent_messages;
- unsigned int mtu; /* max wire packet size */
+ /* Buffered application records.
+ * Only for records between CCS and Finished
+ * to prevent either protocol violation or
+ * unnecessary message loss.
+ */
+ record_pqueue buffered_app_data;
+
+ unsigned int mtu; /* max DTLS packet size */
struct hm_header_st w_msg_hdr;
struct hm_header_st r_msg_hdr;
struct dtls1_timeout_st timeout;
-
+
+ /* Indicates when the last handshake msg sent will timeout */
+ struct timeval next_timeout;
+
+ /* Timeout duration */
+ unsigned short timeout_duration;
+
/* storage for Alert/Handshake protocol data received but not
* yet processed by ssl3_read_bytes: */
unsigned char alert_fragment[DTLS1_AL_HEADER_LENGTH];