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| >247 || throw error | | >247 || throw error | ||
|} | |} | ||
==Sending XPC Commands== | |||
Four XPC keys are send for the XPC command: | |||
*NFMsgObject - dictionary containing values to sent to receiving objects | |||
*NFMsgType - uint64, sending is a 0, receiving a 1 | |||
*NFMsgCode - uint64, "command" as described above | |||
*NFMsgId - uint64, no idea at the moment | |||
Example of XPC command to the nfcd: | |||
<source lang='javascript'> | <source lang='javascript'> | ||
xpc_dictionary_set_uint64( | #include <xpc/xpc.h> | ||
int main(int argc, char **argv, char **envp) { | |||
// Create connection to mach service | |||
xpc_connection_t connection = xpc_connection_create_mach_service("com.apple.nfcd", NULL, 0); | |||
xpc_connection_set_event_handler(connection, ^(xpc_object_t some_object) { }); | |||
xpc_connection_resume(connection); | |||
while (true) { | |||
// Send message to mach service, and wait for a response | |||
xpc_object_t msgobject = xpc_dictionary_create(NULL,NULL,0); | |||
xpc_object_t object = xpc_dictionary_create(NULL, NULL, 0); | |||
xpc_dictionary_set_int64(msgobject, "Controller",6); | |||
xpc_dictionary_set_value(object, "NFMsgObject", msgobject); | |||
xpc_dictionary_set_uint64(object, "NFMsgType" ,0x00); | |||
xpc_dictionary_set_uint64(object, "NFMsgCode" ,0x01); | |||
xpc_dictionary_set_uint64(object, "NFMsgId" ,17); | |||
printf("Sending object: %s\n", xpc_copy_description(object)); | |||
xpc_object_t reply = xpc_connection_send_message_with_reply_sync(connection, object); | |||
printf("Received reply object: %s\n\n", xpc_copy_description(reply)); | |||
sleep(1); | |||
} | |||
return 0; | |||
} | |||
</source> | </source> | ||
see https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/xpc_dictionary_set_uint64.3.html | see https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/xpc_dictionary_set_uint64.3.html |
Revision as of 12:37, 29 September 2015
nfcd is a daemon running under the mobile user. It handles the communications between PassKit and the underlying hardware and libraries.
The core objects in it are:
- NFDaemon
- NFFieldDetectController
- NFCoreTelephonyConnection
- NFPowerManager
- NFAbstractController
- NFCardEmulationController
- NFSecureElementController
NFDaemon - (void)XPCConnection:(id) didReceiveCommand:(id)
Launchd plist
{
EnablePressuredExit = 1;
EnableTransactions = 1;
ExitTimeOut = 45;
Label = "com.apple.nfcd";
MachServices = {
"com.apple.nfcd" = 1;
};
ProcessType = Interactive;
Program = "/usr/libexec/nfcd";
UserName = mobile;
}
Where the XPC service is registered under the "com.apple.nfcd" name
Supported XPC Commands
ID | Command |
---|---|
1 | q_registerConnection:info: |
2 | q_unregisterConnection: |
3-64 | send command to SE controller |
65 | q_updateSecureElementPowerState |
66 | _seIsInRestrictedMode |
67 | restrictedModeChanged |
68-239 | callSEContoller |
240 | setDeviceString |
241 | q_getControllerInfo |
242 | q_getSecureElementInfo |
243 | q_getBoosterInfo |
244 | q_readBoosterRegister |
245 | q_sendBoosterCommand |
246 | q_triggerAssertion |
>247 | throw error |
Sending XPC Commands
Four XPC keys are send for the XPC command:
- NFMsgObject - dictionary containing values to sent to receiving objects
- NFMsgType - uint64, sending is a 0, receiving a 1
- NFMsgCode - uint64, "command" as described above
- NFMsgId - uint64, no idea at the moment
Example of XPC command to the nfcd:
#include <xpc/xpc.h>
int main(int argc, char **argv, char **envp) {
// Create connection to mach service
xpc_connection_t connection = xpc_connection_create_mach_service("com.apple.nfcd", NULL, 0);
xpc_connection_set_event_handler(connection, ^(xpc_object_t some_object) { });
xpc_connection_resume(connection);
while (true) {
// Send message to mach service, and wait for a response
xpc_object_t msgobject = xpc_dictionary_create(NULL,NULL,0);
xpc_object_t object = xpc_dictionary_create(NULL, NULL, 0);
xpc_dictionary_set_int64(msgobject, "Controller",6);
xpc_dictionary_set_value(object, "NFMsgObject", msgobject);
xpc_dictionary_set_uint64(object, "NFMsgType" ,0x00);
xpc_dictionary_set_uint64(object, "NFMsgCode" ,0x01);
xpc_dictionary_set_uint64(object, "NFMsgId" ,17);
printf("Sending object: %s\n", xpc_copy_description(object));
xpc_object_t reply = xpc_connection_send_message_with_reply_sync(connection, object);
printf("Received reply object: %s\n\n", xpc_copy_description(reply));
sleep(1);
}
return 0;
}
NFDaemon - (int)q_registerConnection:(XPCConnection) info:()
NFDaemon - (unsigned int)q_unregisterConnection:(XPCConnection)
This functions checks for an existing controller for the
- [NFCardEmulationController embeddedCardEmulationController]
- [NFCardEmulationController UICCCardEmulationController]
- [NFSecureElementController seController]
- [NFFieldDetectController fieldDetectController]
Then when it finds the appropriate controller then calls the unregister function for it.