esp-nimble-cpp/src/NimBLEUtils.cpp

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/*
* NimBLEUtils.cpp
*
* Created: on Jan 25 2020
* Author H2zero
*
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*/
#include "sdkconfig.h"
#if defined(CONFIG_BT_ENABLED)
#include "NimBLEUtils.h"
#include "NimBLELog.h"
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#include "nimconfig.h"
static const char* LOG_TAG = "NimBLEUtils";
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/**
* @brief A function for checking validity of connection parameters.
* @param [in] params A pointer to the structure containing the parameters to check.
* @return valid == 0 or error code.
*/
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int NimBLEUtils::checkConnParams(ble_gap_conn_params* params) {
/* Check connection interval min */
if ((params->itvl_min < BLE_HCI_CONN_ITVL_MIN) ||
(params->itvl_min > BLE_HCI_CONN_ITVL_MAX)) {
return BLE_ERR_INV_HCI_CMD_PARMS;
}
/* Check connection interval max */
if ((params->itvl_max < BLE_HCI_CONN_ITVL_MIN) ||
(params->itvl_max > BLE_HCI_CONN_ITVL_MAX) ||
(params->itvl_max < params->itvl_min)) {
return BLE_ERR_INV_HCI_CMD_PARMS;
}
/* Check connection latency */
if (params->latency > BLE_HCI_CONN_LATENCY_MAX) {
return BLE_ERR_INV_HCI_CMD_PARMS;
}
/* Check supervision timeout */
if ((params->supervision_timeout < BLE_HCI_CONN_SPVN_TIMEOUT_MIN) ||
(params->supervision_timeout > BLE_HCI_CONN_SPVN_TIMEOUT_MAX)) {
return BLE_ERR_INV_HCI_CMD_PARMS;
}
/* Check connection event length */
if (params->min_ce_len > params->max_ce_len) {
return BLE_ERR_INV_HCI_CMD_PARMS;
}
return 0;
}
/**
* @brief Converts a return code from the NimBLE stack to a text string.
* @param [in] rc The return code to convert.
* @return A string representation of the return code.
*/
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const char* NimBLEUtils::returnCodeToString(int rc) {
#if defined(CONFIG_NIMBLE_CPP_ENABLE_RETURN_CODE_TEXT)
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switch(rc) {
case 0:
return "SUCCESS";
case BLE_HS_EAGAIN:
return "Temporary failure; try again.";
case BLE_HS_EALREADY:
return "Operation already in progress or completed.";
case BLE_HS_EINVAL:
return "One or more arguments are invalid.";
case BLE_HS_EMSGSIZE:
return "The provided buffer is too small.";
case BLE_HS_ENOENT:
return "No entry matching the specified criteria.";
case BLE_HS_ENOMEM:
return "Operation failed due to resource exhaustion.";
case BLE_HS_ENOTCONN:
return "No open connection with the specified handle.";
case BLE_HS_ENOTSUP:
return "Operation disabled at compile time.";
case BLE_HS_EAPP:
return "Application callback behaved unexpectedly.";
case BLE_HS_EBADDATA:
return "Command from peer is invalid.";
case BLE_HS_EOS:
return "Mynewt OS error.";
case BLE_HS_ECONTROLLER:
return "Event from controller is invalid.";
case BLE_HS_ETIMEOUT:
return "Operation timed out.";
case BLE_HS_EDONE:
return "Operation completed successfully.";
case BLE_HS_EBUSY:
return "Operation cannot be performed until procedure completes.";
case BLE_HS_EREJECT:
return "Peer rejected a connection parameter update request.";
case BLE_HS_EUNKNOWN:
return "Unexpected failure; catch all.";
case BLE_HS_EROLE:
return "Operation requires different role (e.g., central vs. peripheral).";
case BLE_HS_ETIMEOUT_HCI:
return "HCI request timed out; controller unresponsive.";
case BLE_HS_ENOMEM_EVT:
return "Controller failed to send event due to memory exhaustion (combined host-controller only).";
case BLE_HS_ENOADDR:
return "Operation requires an identity address but none configured.";
case BLE_HS_ENOTSYNCED:
return "Attempt to use the host before it is synced with controller.";
case BLE_HS_EAUTHEN:
return "Insufficient authentication.";
case BLE_HS_EAUTHOR:
return "Insufficient authorization.";
case BLE_HS_EENCRYPT:
return "Insufficient encryption level.";
case BLE_HS_EENCRYPT_KEY_SZ:
return "Insufficient key size.";
case BLE_HS_ESTORE_CAP:
return "Storage at capacity.";
case BLE_HS_ESTORE_FAIL:
return "Storage IO error.";
case (0x0100+BLE_ATT_ERR_INVALID_HANDLE ):
return "The attribute handle given was not valid on this server.";
case (0x0100+BLE_ATT_ERR_READ_NOT_PERMITTED ):
return "The attribute cannot be read.";
case (0x0100+BLE_ATT_ERR_WRITE_NOT_PERMITTED ):
return "The attribute cannot be written.";
case (0x0100+BLE_ATT_ERR_INVALID_PDU ):
return "The attribute PDU was invalid.";
case (0x0100+BLE_ATT_ERR_INSUFFICIENT_AUTHEN ):
return "The attribute requires authentication before it can be read or written.";
case (0x0100+BLE_ATT_ERR_REQ_NOT_SUPPORTED ):
return "Attribute server does not support the request received from the client.";
case (0x0100+BLE_ATT_ERR_INVALID_OFFSET ):
return "Offset specified was past the end of the attribute.";
case (0x0100+BLE_ATT_ERR_INSUFFICIENT_AUTHOR ):
return "The attribute requires authorization before it can be read or written.";
case (0x0100+BLE_ATT_ERR_PREPARE_QUEUE_FULL ):
return "Too many prepare writes have been queued.";
case (0x0100+BLE_ATT_ERR_ATTR_NOT_FOUND ):
return "No attribute found within the given attribute handle range.";
case (0x0100+BLE_ATT_ERR_ATTR_NOT_LONG ):
return "The attribute cannot be read or written using the Read Blob Request.";
case (0x0100+BLE_ATT_ERR_INSUFFICIENT_KEY_SZ ):
return "The Encryption Key Size used for encrypting this link is insufficient.";
case (0x0100+BLE_ATT_ERR_INVALID_ATTR_VALUE_LEN ):
return "The attribute value length is invalid for the operation.";
case (0x0100+BLE_ATT_ERR_UNLIKELY ):
return "The attribute request has encountered an error that was unlikely, could not be completed as requested.";
case (0x0100+BLE_ATT_ERR_INSUFFICIENT_ENC ):
return "The attribute requires encryption before it can be read or written.";
case (0x0100+BLE_ATT_ERR_UNSUPPORTED_GROUP ):
return "The attribute type is not a supported grouping attribute as defined by a higher layer specification.";
case (0x0100+BLE_ATT_ERR_INSUFFICIENT_RES ):
return "Insufficient Resources to complete the request.";
case (0x0200+BLE_ERR_UNKNOWN_HCI_CMD ):
return "Unknown HCI Command";
case (0x0200+BLE_ERR_UNK_CONN_ID ):
return "Unknown Connection Identifier";
case (0x0200+BLE_ERR_HW_FAIL ):
return "Hardware Failure";
case (0x0200+BLE_ERR_PAGE_TMO ):
return "Page Timeout";
case (0x0200+BLE_ERR_AUTH_FAIL ):
return "Authentication Failure";
case (0x0200+BLE_ERR_PINKEY_MISSING ):
return "PIN or Key Missing";
case (0x0200+BLE_ERR_MEM_CAPACITY ):
return "Memory Capacity Exceeded";
case (0x0200+BLE_ERR_CONN_SPVN_TMO ):
return "Connection Timeout";
case (0x0200+BLE_ERR_CONN_LIMIT ):
return "Connection Limit Exceeded";
case (0x0200+BLE_ERR_SYNCH_CONN_LIMIT ):
return "Synchronous Connection Limit To A Device Exceeded";
case (0x0200+BLE_ERR_ACL_CONN_EXISTS ):
return "ACL Connection Already Exists";
case (0x0200+BLE_ERR_CMD_DISALLOWED ):
return "Command Disallowed";
case (0x0200+BLE_ERR_CONN_REJ_RESOURCES ):
return "Connection Rejected due to Limited Resources";
case (0x0200+BLE_ERR_CONN_REJ_SECURITY ):
return "Connection Rejected Due To Security Reasons";
case (0x0200+BLE_ERR_CONN_REJ_BD_ADDR ):
return "Connection Rejected due to Unacceptable BD_ADDR";
case (0x0200+BLE_ERR_CONN_ACCEPT_TMO ):
return "Connection Accept Timeout Exceeded";
case (0x0200+BLE_ERR_UNSUPPORTED ):
return "Unsupported Feature or Parameter Value";
case (0x0200+BLE_ERR_INV_HCI_CMD_PARMS ):
return "Invalid HCI Command Parameters";
case (0x0200+BLE_ERR_REM_USER_CONN_TERM ):
return "Remote User Terminated Connection";
case (0x0200+BLE_ERR_RD_CONN_TERM_RESRCS ):
return "Remote Device Terminated Connection due to Low Resources";
case (0x0200+BLE_ERR_RD_CONN_TERM_PWROFF ):
return "Remote Device Terminated Connection due to Power Off";
case (0x0200+BLE_ERR_CONN_TERM_LOCAL ):
return "Connection Terminated By Local Host";
case (0x0200+BLE_ERR_REPEATED_ATTEMPTS ):
return "Repeated Attempts";
case (0x0200+BLE_ERR_NO_PAIRING ):
return "Pairing Not Allowed";
case (0x0200+BLE_ERR_UNK_LMP ):
return "Unknown LMP PDU";
case (0x0200+BLE_ERR_UNSUPP_REM_FEATURE ):
return "Unsupported Remote Feature / Unsupported LMP Feature";
case (0x0200+BLE_ERR_SCO_OFFSET ):
return "SCO Offset Rejected";
case (0x0200+BLE_ERR_SCO_ITVL ):
return "SCO Interval Rejected";
case (0x0200+BLE_ERR_SCO_AIR_MODE ):
return "SCO Air Mode Rejected";
case (0x0200+BLE_ERR_INV_LMP_LL_PARM ):
return "Invalid LMP Parameters / Invalid LL Parameters";
case (0x0200+BLE_ERR_UNSPECIFIED ):
return "Unspecified Error";
case (0x0200+BLE_ERR_UNSUPP_LMP_LL_PARM ):
return "Unsupported LMP Parameter Value / Unsupported LL Parameter Value";
case (0x0200+BLE_ERR_NO_ROLE_CHANGE ):
return "Role Change Not Allowed";
case (0x0200+BLE_ERR_LMP_LL_RSP_TMO ):
return "LMP Response Timeout / LL Response Timeout";
case (0x0200+BLE_ERR_LMP_COLLISION ):
return "LMP Error Transaction Collision";
case (0x0200+BLE_ERR_LMP_PDU ):
return "LMP PDU Not Allowed";
case (0x0200+BLE_ERR_ENCRYPTION_MODE ):
return "Encryption Mode Not Acceptable";
case (0x0200+BLE_ERR_LINK_KEY_CHANGE ):
return "Link Key cannot be Changed";
case (0x0200+BLE_ERR_UNSUPP_QOS ):
return "Requested QoS Not Supported";
case (0x0200+BLE_ERR_INSTANT_PASSED ):
return "Instant Passed";
case (0x0200+BLE_ERR_UNIT_KEY_PAIRING ):
return "Pairing With Unit Key Not Supported";
case (0x0200+BLE_ERR_DIFF_TRANS_COLL ):
return "Different Transaction Collision";
case (0x0200+BLE_ERR_QOS_PARM ):
return "QoS Unacceptable Parameter";
case (0x0200+BLE_ERR_QOS_REJECTED ):
return "QoS Rejected";
case (0x0200+BLE_ERR_CHAN_CLASS ):
return "Channel Classification Not Supported";
case (0x0200+BLE_ERR_INSUFFICIENT_SEC ):
return "Insufficient Security";
case (0x0200+BLE_ERR_PARM_OUT_OF_RANGE ):
return "Parameter Out Of Mandatory Range";
case (0x0200+BLE_ERR_PENDING_ROLE_SW ):
return "Role Switch Pending";
case (0x0200+BLE_ERR_RESERVED_SLOT ):
return "Reserved Slot Violation";
case (0x0200+BLE_ERR_ROLE_SW_FAIL ):
return "Role Switch Failed";
case (0x0200+BLE_ERR_INQ_RSP_TOO_BIG ):
return "Extended Inquiry Response Too Large";
case (0x0200+BLE_ERR_SEC_SIMPLE_PAIR ):
return "Secure Simple Pairing Not Supported By Host";
case (0x0200+BLE_ERR_HOST_BUSY_PAIR ):
return "Host Busy - Pairing";
case (0x0200+BLE_ERR_CONN_REJ_CHANNEL ):
return "Connection Rejected, No Suitable Channel Found";
case (0x0200+BLE_ERR_CTLR_BUSY ):
return "Controller Busy";
case (0x0200+BLE_ERR_CONN_PARMS ):
return "Unacceptable Connection Parameters";
case (0x0200+BLE_ERR_DIR_ADV_TMO ):
return "Directed Advertising Timeout";
case (0x0200+BLE_ERR_CONN_TERM_MIC ):
return "Connection Terminated due to MIC Failure";
case (0x0200+BLE_ERR_CONN_ESTABLISHMENT ):
return "Connection Failed to be Established";
case (0x0200+BLE_ERR_MAC_CONN_FAIL ):
return "MAC Connection Failed";
case (0x0200+BLE_ERR_COARSE_CLK_ADJ ):
return "Coarse Clock Adjustment Rejected";
case (0x0300+BLE_L2CAP_SIG_ERR_CMD_NOT_UNDERSTOOD ):
return "Invalid or unsupported incoming L2CAP sig command.";
case (0x0300+BLE_L2CAP_SIG_ERR_MTU_EXCEEDED ):
return "Incoming packet too large.";
case (0x0300+BLE_L2CAP_SIG_ERR_INVALID_CID ):
return "No channel with specified ID.";
case (0x0400+BLE_SM_ERR_PASSKEY ):
return "The user input of passkey failed, for example, the user cancelled the operation.";
case (0x0400+BLE_SM_ERR_OOB ):
return "The OOB data is not available.";
case (0x0400+BLE_SM_ERR_AUTHREQ ):
return "The pairing procedure cannot be performed as authentication requirements cannot be met due to IO capabilities of one or both devices.";
case (0x0400+BLE_SM_ERR_CONFIRM_MISMATCH ):
return "The confirm value does not match the calculated compare value.";
case (0x0400+BLE_SM_ERR_PAIR_NOT_SUPP ):
return "Pairing is not supported by the device.";
case (0x0400+BLE_SM_ERR_ENC_KEY_SZ ):
return "The resultant encryption key size is insufficient for the security requirements of this device.";
case (0x0400+BLE_SM_ERR_CMD_NOT_SUPP ):
return "The SMP command received is not supported on this device.";
case (0x0400+BLE_SM_ERR_UNSPECIFIED ):
return "Pairing failed due to an unspecified reason.";
case (0x0400+BLE_SM_ERR_REPEATED ):
return "Pairing or authentication procedure disallowed, too little time has elapsed since last pairing request or security request.";
case (0x0400+BLE_SM_ERR_INVAL ):
return "Command length is invalid or that a parameter is outside of the specified range.";
case (0x0400+BLE_SM_ERR_DHKEY ):
return "DHKey Check value received doesn't match the one calculated by the local device.";
case (0x0400+BLE_SM_ERR_NUMCMP ):
return "Confirm values in the numeric comparison protocol do not match.";
case (0x0400+BLE_SM_ERR_ALREADY ):
return "Pairing over the LE transport failed - Pairing Request sent over the BR/EDR transport in process.";
case (0x0400+BLE_SM_ERR_CROSS_TRANS ):
return "BR/EDR Link Key generated on the BR/EDR transport cannot be used to derive and distribute keys for the LE transport.";
case (0x0500+BLE_SM_ERR_PASSKEY ):
return "The user input of passkey failed or the user cancelled the operation.";
case (0x0500+BLE_SM_ERR_OOB ):
return "The OOB data is not available.";
case (0x0500+BLE_SM_ERR_AUTHREQ ):
return "The pairing procedure cannot be performed as authentication requirements cannot be met due to IO capabilities of one or both devices.";
case (0x0500+BLE_SM_ERR_CONFIRM_MISMATCH ):
return "The confirm value does not match the calculated compare value.";
case (0x0500+BLE_SM_ERR_PAIR_NOT_SUPP ):
return "Pairing is not supported by the device.";
case (0x0500+BLE_SM_ERR_ENC_KEY_SZ ):
return "The resultant encryption key size is insufficient for the security requirements of this device.";
case (0x0500+BLE_SM_ERR_CMD_NOT_SUPP ):
return "The SMP command received is not supported on this device.";
case (0x0500+BLE_SM_ERR_UNSPECIFIED ):
return "Pairing failed due to an unspecified reason.";
case (0x0500+BLE_SM_ERR_REPEATED ):
return "Pairing or authentication procedure is disallowed because too little time has elapsed since last pairing request or security request.";
case (0x0500+BLE_SM_ERR_INVAL ):
return "Command length is invalid or a parameter is outside of the specified range.";
case (0x0500+BLE_SM_ERR_DHKEY ):
return "Indicates to the remote device that the DHKey Check value received doesnt match the one calculated by the local device.";
case (0x0500+BLE_SM_ERR_NUMCMP ):
return "Confirm values in the numeric comparison protocol do not match.";
case (0x0500+BLE_SM_ERR_ALREADY ):
return "Pairing over the LE transport failed - Pairing Request sent over the BR/EDR transport in process.";
case (0x0500+BLE_SM_ERR_CROSS_TRANS ):
return "BR/EDR Link Key generated on the BR/EDR transport cannot be used to derive and distribute keys for the LE transport.";
default:
return "Unknown";
}
#else // #if defined(CONFIG_NIMBLE_CPP_ENABLE_RETURN_CODE_TEXT)
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return "";
#endif // #if defined(CONFIG_NIMBLE_CPP_ENABLE_RETURN_CODE_TEXT)
}
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/**
* @brief Convert the advertising type flag to a string.
* @param advType The type to convert.
* @return A string representation of the advertising flags.
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*/
const char* NimBLEUtils::advTypeToString(uint8_t advType) {
#if defined(CONFIG_NIMBLE_CPP_ENABLE_ADVERTISMENT_TYPE_TEXT)
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switch(advType) {
case BLE_HCI_ADV_TYPE_ADV_IND : //0
return "Undirected - Connectable / Scannable";
case BLE_HCI_ADV_TYPE_ADV_DIRECT_IND_HD: //1
return "Directed High Duty - Connectable";
case BLE_HCI_ADV_TYPE_ADV_SCAN_IND: //2
return "Non-Connectable - Scan Response Available";
case BLE_HCI_ADV_TYPE_ADV_NONCONN_IND: //3
return "Non-Connectable - No Scan Response";
case BLE_HCI_ADV_TYPE_ADV_DIRECT_IND_LD: //4
return "Directed Low Duty - Connectable";
default:
return "Unknown flag";
}
#else // #if defined(CONFIG_NIMBLE_CPP_ENABLE_ADVERTISMENT_TYPE_TEXT)
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return "";
#endif // #if defined(CONFIG_NIMBLE_CPP_ENABLE_ADVERTISMENT_TYPE_TEXT)
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} // adFlagsToString
/**
* @brief Create a hex representation of data.
*
* @param [in] target Where to write the hex string. If this is null, we malloc storage.
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* @param [in] source The start of the binary data.
* @param [in] length The length of the data to convert.
* @return A pointer to the formatted buffer.
*/
char* NimBLEUtils::buildHexData(uint8_t* target, const uint8_t* source, uint8_t length) {
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// Guard against too much data.
if (length > 100) length = 100;
if (target == nullptr) {
target = (uint8_t*) malloc(length * 2 + 1);
if (target == nullptr) {
NIMBLE_LOGE(LOG_TAG, "buildHexData: malloc failed");
return nullptr;
}
}
char* startOfData = (char*) target;
for (int i = 0; i < length; i++) {
sprintf((char*) target, "%.2x", (char) *source);
source++;
target += 2;
}
// Handle the special case where there was no data.
if (length == 0) {
*startOfData = 0;
}
return startOfData;
} // buildHexData
/**
* @brief Utility function to log the gap event info.
* @param [in] event A pointer to the gap event structure.
* @param [in] arg Unused.
*/
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void NimBLEUtils::dumpGapEvent(ble_gap_event *event, void *arg){
#if defined(CONFIG_NIMBLE_CPP_ENABLE_GAP_EVENT_CODE_TEXT)
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NIMBLE_LOGD(LOG_TAG, "Received a GAP event: %s", gapEventToString(event->type));
#endif
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}
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/**
* @brief Convert a GAP event type to a string representation.
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* @param [in] eventType The type of event.
* @return A string representation of the event type.
*/
const char* NimBLEUtils::gapEventToString(uint8_t eventType) {
#if defined(CONFIG_NIMBLE_CPP_ENABLE_GAP_EVENT_CODE_TEXT)
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switch (eventType) {
case BLE_GAP_EVENT_CONNECT : //0
return "BLE_GAP_EVENT_CONNECT ";
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case BLE_GAP_EVENT_DISCONNECT: //1
return "BLE_GAP_EVENT_DISCONNECT";
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case BLE_GAP_EVENT_CONN_UPDATE: //3
return "BLE_GAP_EVENT_CONN_UPDATE";
case BLE_GAP_EVENT_CONN_UPDATE_REQ: //4
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return "BLE_GAP_EVENT_CONN_UPDATE_REQ";
case BLE_GAP_EVENT_L2CAP_UPDATE_REQ: //5
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return "BLE_GAP_EVENT_L2CAP_UPDATE_REQ";
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case BLE_GAP_EVENT_TERM_FAILURE: //6
return "BLE_GAP_EVENT_TERM_FAILURE";
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case BLE_GAP_EVENT_DISC: //7
return "BLE_GAP_EVENT_DISC";
case BLE_GAP_EVENT_DISC_COMPLETE: //8
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return "BLE_GAP_EVENT_DISC_COMPLETE";
case BLE_GAP_EVENT_ADV_COMPLETE: //9
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return "BLE_GAP_EVENT_ADV_COMPLETE";
case BLE_GAP_EVENT_ENC_CHANGE: //10
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return "BLE_GAP_EVENT_ENC_CHANGE";
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case BLE_GAP_EVENT_PASSKEY_ACTION : //11
return "BLE_GAP_EVENT_PASSKEY_ACTION";
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case BLE_GAP_EVENT_NOTIFY_RX: //12
return "BLE_GAP_EVENT_NOTIFY_RX";
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case BLE_GAP_EVENT_NOTIFY_TX : //13
return "BLE_GAP_EVENT_NOTIFY_TX";
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case BLE_GAP_EVENT_SUBSCRIBE : //14
return "BLE_GAP_EVENT_SUBSCRIBE";
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case BLE_GAP_EVENT_MTU: //15
return "BLE_GAP_EVENT_MTU";
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case BLE_GAP_EVENT_IDENTITY_RESOLVED: //16
return "BLE_GAP_EVENT_IDENTITY_RESOLVED";
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case BLE_GAP_EVENT_REPEAT_PAIRING: //17
return "BLE_GAP_EVENT_REPEAT_PAIRING";
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case BLE_GAP_EVENT_PHY_UPDATE_COMPLETE: //18
return "BLE_GAP_EVENT_PHY_UPDATE_COMPLETE";
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case BLE_GAP_EVENT_EXT_DISC: //19
return "BLE_GAP_EVENT_EXT_DISC";
#ifdef BLE_GAP_EVENT_PERIODIC_SYNC // IDF 4.0 does not support these
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case BLE_GAP_EVENT_PERIODIC_SYNC: //20
return "BLE_GAP_EVENT_PERIODIC_SYNC";
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case BLE_GAP_EVENT_PERIODIC_REPORT: //21
return "BLE_GAP_EVENT_PERIODIC_REPORT";
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case BLE_GAP_EVENT_PERIODIC_SYNC_LOST: //22
return "BLE_GAP_EVENT_PERIODIC_SYNC_LOST";
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case BLE_GAP_EVENT_SCAN_REQ_RCVD: //23
return "BLE_GAP_EVENT_SCAN_REQ_RCVD";
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#endif
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default:
NIMBLE_LOGD(LOG_TAG, "gapEventToString: Unknown event type %d 0x%.2x", eventType, eventType);
return "Unknown event type";
}
#else // #if defined(CONFIG_NIMBLE_CPP_ENABLE_GAP_EVENT_CODE_TEXT)
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return "";
#endif // #if defined(CONFIG_NIMBLE_CPP_ENABLE_GAP_EVENT_CODE_TEXT)
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} // gapEventToString
#endif //CONFIG_BT_ENABLED