PR: 1929
[openssl.git] / ssl / dtls1.h
index 6548a98..884bbd3 100644 (file)
@@ -68,6 +68,7 @@ extern "C" {
 #endif
 
 #define DTLS1_VERSION                  0xFEFF
+#define DTLS1_BAD_VER                  0x0100
 
 #if 0
 /* this alert description is not specified anywhere... */
@@ -102,6 +103,19 @@ typedef struct dtls1_bitmap_st
                                           encoding */
        } DTLS1_BITMAP;
 
+struct dtls1_retransmit_state
+       {
+       EVP_CIPHER_CTX *enc_write_ctx;  /* cryptographic state */
+       EVP_MD_CTX *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;
@@ -110,6 +124,7 @@ struct hm_header_st
        unsigned long frag_off;
        unsigned long frag_len;
        unsigned int is_ccs;
+       struct dtls1_retransmit_state saved_retransmit_state;
        };
 
 struct ccs_header_st
@@ -169,6 +184,9 @@ typedef struct dtls1_state_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;
@@ -179,13 +197,26 @@ typedef struct dtls1_state_st
        /* 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];