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       1                 :             : /**
       2                 :             :  *  Copyright Notice:
       3                 :             :  *  Copyright 2025-2026 DMTF. All rights reserved.
       4                 :             :  *  License: BSD 3-Clause License. For full text see link: https://github.com/DMTF/libspdm/blob/main/LICENSE.md
       5                 :             :  **/
       6                 :             : 
       7                 :             : #include "internal/libspdm_responder_lib.h"
       8                 :             : 
       9                 :             : #if (LIBSPDM_ENABLE_CAPABILITY_ENCAP_CAP) && (LIBSPDM_ENABLE_CAPABILITY_EVENT_CAP)
      10                 :             : 
      11                 :           7 : libspdm_return_t libspdm_get_encap_request_send_event(
      12                 :             :     void *context,
      13                 :             :     uint32_t session_id,
      14                 :             :     size_t *encap_request_size,
      15                 :             :     void *encap_request)
      16                 :             : {
      17                 :             :     libspdm_context_t *spdm_context;
      18                 :             :     libspdm_encap_context_t *encap_context;
      19                 :             :     spdm_send_event_request_t *spdm_request;
      20                 :             :     libspdm_session_info_t *session_info;
      21                 :             :     libspdm_session_state_t session_state;
      22                 :             :     uint32_t event_count;
      23                 :             :     size_t events_list_size;
      24                 :             : 
      25                 :           7 :     spdm_context = context;
      26                 :           7 :     spdm_request = encap_request;
      27                 :             : 
      28                 :           7 :     encap_context = libspdm_get_encap_context(spdm_context, &session_id);
      29         [ +  + ]:           7 :     if (encap_context == NULL) {
      30                 :             :         /* session_id does not refer to an existing session. */
      31                 :           1 :         return LIBSPDM_STATUS_INVALID_STATE_LOCAL;
      32                 :             :     }
      33                 :             : 
      34                 :           6 :     encap_context->last_encap_request_size = 0;
      35                 :             : 
      36                 :           6 :     session_info = libspdm_get_session_info_via_session_id(spdm_context, session_id);
      37         [ -  + ]:           6 :     if (session_info == NULL) {
      38                 :           0 :         return LIBSPDM_STATUS_INVALID_STATE_LOCAL;
      39                 :             :     }
      40                 :           6 :     session_state = libspdm_secured_message_get_session_state(
      41                 :             :         session_info->secured_message_context);
      42         [ +  + ]:           6 :     if (session_state != LIBSPDM_SESSION_STATE_ESTABLISHED) {
      43                 :           1 :         return LIBSPDM_STATUS_INVALID_STATE_LOCAL;
      44                 :             :     }
      45                 :             : 
      46                 :           5 :     spdm_request->header.spdm_version = libspdm_get_connection_version(spdm_context);
      47                 :           5 :     spdm_request->header.request_response_code = SPDM_SEND_EVENT;
      48                 :           5 :     spdm_request->header.param1 = 0;
      49                 :           5 :     spdm_request->header.param2 = 0;
      50                 :             : 
      51                 :           5 :     events_list_size = *encap_request_size - sizeof(spdm_send_event_request_t);
      52                 :             : 
      53         [ +  + ]:           5 :     if (!libspdm_generate_event_list(spdm_context, libspdm_get_connection_version(spdm_context),
      54                 :             :                                      session_id, &event_count, &events_list_size,
      55                 :           5 :                                      (uint8_t *)(spdm_request + 1))) {
      56                 :           1 :         return LIBSPDM_STATUS_INVALID_STATE_LOCAL;
      57                 :             :     }
      58                 :             : 
      59         [ -  + ]:           4 :     LIBSPDM_ASSERT(event_count != 0);
      60         [ -  + ]:           4 :     LIBSPDM_ASSERT(events_list_size != 0);
      61                 :             : 
      62                 :           4 :     spdm_request->event_count = event_count;
      63                 :             : 
      64                 :           4 :     *encap_request_size = sizeof(spdm_send_event_request_t) + events_list_size;
      65                 :             : 
      66                 :           4 :     libspdm_copy_mem(&encap_context->last_encap_request_header,
      67                 :             :                      sizeof(encap_context->last_encap_request_header),
      68                 :           4 :                      &spdm_request->header, sizeof(spdm_message_header_t));
      69                 :           4 :     encap_context->last_encap_request_size = *encap_request_size;
      70                 :             : 
      71                 :           4 :     return LIBSPDM_STATUS_SUCCESS;
      72                 :             : }
      73                 :             : 
      74                 :           4 : libspdm_return_t libspdm_process_encap_response_event_ack(
      75                 :             :     libspdm_context_t *spdm_context, size_t encap_response_size,
      76                 :             :     const void *encap_response, bool *need_continue)
      77                 :             : {
      78                 :             :     libspdm_return_t status;
      79                 :             :     const spdm_event_ack_response_t *spdm_response;
      80                 :             :     size_t spdm_response_size;
      81                 :             :     uint32_t session_id;
      82                 :             : 
      83         [ +  + ]:           4 :     if (spdm_context->last_spdm_request_session_id_valid) {
      84                 :             :         libspdm_session_info_t *session_info;
      85                 :             :         libspdm_session_state_t session_state;
      86                 :             : 
      87                 :           3 :         session_id = spdm_context->last_spdm_request_session_id;
      88                 :           3 :         session_info = libspdm_get_session_info_via_session_id(spdm_context, session_id);
      89                 :             : 
      90         [ -  + ]:           3 :         if (session_info == NULL) {
      91                 :           0 :             return LIBSPDM_STATUS_INVALID_STATE_LOCAL;
      92                 :             :         }
      93                 :             : 
      94                 :           3 :         session_state = libspdm_secured_message_get_session_state(
      95                 :             :             session_info->secured_message_context);
      96                 :             : 
      97         [ -  + ]:           3 :         if (session_state != LIBSPDM_SESSION_STATE_ESTABLISHED) {
      98                 :           0 :             return LIBSPDM_STATUS_INVALID_STATE_LOCAL;
      99                 :             :         }
     100                 :             :     } else {
     101                 :           1 :         return LIBSPDM_STATUS_ERROR_PEER;
     102                 :             :     }
     103                 :             : 
     104                 :           3 :     spdm_response = encap_response;
     105                 :           3 :     spdm_response_size = encap_response_size;
     106                 :             : 
     107         [ +  + ]:           3 :     if (spdm_response->header.spdm_version != libspdm_get_connection_version(spdm_context)) {
     108                 :           1 :         return LIBSPDM_STATUS_INVALID_MSG_FIELD;
     109                 :             :     }
     110                 :             : 
     111         [ -  + ]:           2 :     if (spdm_response->header.request_response_code == SPDM_ERROR) {
     112                 :           0 :         status = libspdm_handle_encap_error_response_main(spdm_response->header.param1);
     113         [ #  # ]:           0 :         if (LIBSPDM_STATUS_IS_ERROR(status)) {
     114                 :           0 :             return status;
     115                 :             :         }
     116         [ -  + ]:           2 :     } else if (spdm_response->header.request_response_code != SPDM_EVENT_ACK) {
     117                 :           0 :         return LIBSPDM_STATUS_INVALID_MSG_FIELD;
     118                 :             :     }
     119                 :             : 
     120         [ -  + ]:           2 :     if (spdm_response_size != sizeof(spdm_event_ack_response_t)) {
     121                 :           0 :         return LIBSPDM_STATUS_INVALID_MSG_SIZE;
     122                 :             :     }
     123                 :             : 
     124                 :           2 :     *need_continue = false;
     125                 :             : 
     126                 :           2 :     return LIBSPDM_STATUS_SUCCESS;
     127                 :             : }
     128                 :             : 
     129                 :             : #endif /* (LIBSPDM_ENABLE_CAPABILITY_ENCAP_CAP) && (LIBSPDM_ENABLE_CAPABILITY_EVENT_CAP) */