-/*
- * The valid handshake states (one for each type message sent and one for each
- * type of message received). There are also two "special" states:
- * TLS = TLS or DTLS state
- * DTLS = DTLS specific state
- * CR/SR = Client Read/Server Read
- * CW/SW = Client Write/Server Write
- *
- * The "special" states are:
- * TLS_ST_BEFORE = No handshake has been initiated yet
- * TLS_ST_OK = A handshake has been successfully completed
- */
-enum HANDSHAKE_STATE {
- TLS_ST_BEFORE,
- TLS_ST_OK,
- DTLS_ST_CR_HELLO_VERIFY_REQUEST,
- TLS_ST_CR_SRVR_HELLO,
- TLS_ST_CR_CERT,
- TLS_ST_CR_CERT_STATUS,
- TLS_ST_CR_KEY_EXCH,
- TLS_ST_CR_CERT_REQ,
- TLS_ST_CR_SRVR_DONE,
- TLS_ST_CR_SESSION_TICKET,
- TLS_ST_CR_CHANGE,
- TLS_ST_CR_FINISHED,
- TLS_ST_CW_CLNT_HELLO,
- TLS_ST_CW_CERT,
- TLS_ST_CW_KEY_EXCH,
- TLS_ST_CW_CERT_VRFY,
- TLS_ST_CW_CHANGE,
- TLS_ST_CW_NEXT_PROTO,
- TLS_ST_CW_FINISHED,
- TLS_ST_SW_HELLO_REQ,
- TLS_ST_SR_CLNT_HELLO,
- DTLS_ST_SW_HELLO_VERIFY_REQUEST,
- TLS_ST_SW_SRVR_HELLO,
- TLS_ST_SW_CERT,
- TLS_ST_SW_KEY_EXCH,
- TLS_ST_SW_CERT_REQ,
- TLS_ST_SW_SRVR_DONE,
- TLS_ST_SR_CERT,
- TLS_ST_SR_KEY_EXCH,
- TLS_ST_SR_CERT_VRFY,
- TLS_ST_SR_NEXT_PROTO,
- TLS_ST_SR_CHANGE,
- TLS_ST_SR_FINISHED,
- TLS_ST_SW_SESSION_TICKET,
- TLS_ST_SW_CERT_STATUS,
- TLS_ST_SW_CHANGE,
- TLS_ST_SW_FINISHED
-};
-
-/*
- * Valid return codes used for functions performing work prior to or after
- * sending or receiving a message
- */
-enum WORK_STATE {
- /* Something went wrong */
- WORK_ERROR,
- /* We're done working and there shouldn't be anything else to do after */
- WORK_FINISHED_STOP,
- /* We're done working move onto the next thing */
- WORK_FINISHED_CONTINUE,
- /* We're working on phase A */
- WORK_MORE_A,
- /* We're working on phase B */
- WORK_MORE_B
-};
-
-/* Write transition return codes */
-enum WRITE_TRAN {
- /* Something went wrong */
- WRITE_TRAN_ERROR,
- /* A transition was successfully completed and we should continue */
- WRITE_TRAN_CONTINUE,
- /* There is no more write work to be done */
- WRITE_TRAN_FINISHED
-};
-
-/* Message processing return codes */
-enum MSG_PROCESS_RETURN {
- MSG_PROCESS_ERROR,
- MSG_PROCESS_FINISHED_READING,
- MSG_PROCESS_CONTINUE_PROCESSING,
- MSG_PROCESS_CONTINUE_READING
-};
-
-/* Message flow states */
-enum MSG_FLOW_STATE {
- /* No handshake in progress */
- MSG_FLOW_UNINITED,
- /* A permanent error with this connection */
- MSG_FLOW_ERROR,
- /* We are about to renegotiate */
- MSG_FLOW_RENEGOTIATE,
- /* We are reading messages */
- MSG_FLOW_READING,
- /* We are writing messages */
- MSG_FLOW_WRITING,
- /* Handshake has finished */
- MSG_FLOW_FINISHED
-};
-
-/* Read states */
-enum READ_STATE {
- READ_STATE_HEADER,
- READ_STATE_BODY,
- READ_STATE_POST_PROCESS
-};
-
-/* Write states */
-enum WRITE_STATE {
- WRITE_STATE_TRANSITION,
- WRITE_STATE_PRE_WORK,
- WRITE_STATE_SEND,
- WRITE_STATE_POST_WORK
-};
-
-struct statem_st {
- enum MSG_FLOW_STATE state;
- enum WRITE_STATE write_state;
- enum WORK_STATE write_state_work;
- enum READ_STATE read_state;
- enum WORK_STATE read_state_work;
- enum HANDSHAKE_STATE hand_state;
- int read_state_first_init;
- int use_timer;
-#ifndef OPENSSL_NO_SCTP
- int in_sctp_read_sock;
-#endif
-};
-typedef struct statem_st STATEM;
-