rmnetctl: Support of unset logical EP

Adding support for unsetting the logical end point configuration
for a network device (Virtual or Physical). This is required
for clean-up and reference accounting process.

CRs-Fixed: 596227
Change-Id: Ifbb65de69c7bee64d930cf413b0058cb32cf8de7

rmnetctl/cli/rmnetcli.c

@@ -2,7 +2,7 @@
 
 			R M N E T C L I . C
 
-Copyright (c) 2013, The Linux Foundation. All rights reserved.
+Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
@@ -151,6 +151,13 @@ static void rmnet_api_usage(void)
 	printf(_5TABS" cannot be larger");
 	printf(_5TABS" than 15 tcharacters");
 	printf(_5TABS" Returns the status code\n\n");
+	printf("rmnetcli unsetlepc <logical_ep_id>       Un-sets the logical");
+	printf(_2TABS"  <dev_name>              endpoint configuration for");
+	printf(_5TABS" a particular link.");
+	printf(_5TABS" integers from -1 to 31.");
+	printf(_5TABS" dev_name cannot be larger");
+	printf(_5TABS" than 15 tcharacters");
+	printf(_5TABS" Returns the status code\n\n");
 	printf("rmnetcli getlepc <logical_ep_id>         Sets the logical");
 	printf(_2TABS" <dev_name>              enpoint configuration for a");
 	printf(_5TABS" particular link.");
@@ -179,7 +186,7 @@ static void rmnet_api_usage(void)
 	printf(_5TABS" 15 chars. Returns");
 	printf(_5TABS" the status code\n\n");
 	printf("rmnetcli getvndname <dev_id>              Get name of");
-	printf(_5TABS" network device node from id");
+	printf(_5TABS" network device node from id\n\n");
 	printf("rmnetcli freevnd <dev_id>              Removes virtual");
 	printf(_5TABS" network device node. dev_name");
 	printf(_5TABS" cannot be larger than 15.");
@@ -369,6 +376,10 @@ static int rmnet_api_call(int argc, char *argv[])
 		return_code = rmnet_set_logical_ep_config(handle,
 		_STRTOI32(argv[1]), _STRTOUI8(argv[2]), argv[3], argv[4],
 		&error_number);
+	} else if (!strcmp(*argv, "unsetlepc")) {
+		_RMNETCLI_CHECKNULL(argv[1]);
+		return_code = rmnet_unset_logical_ep_config(handle,
+		_STRTOI32(argv[1]), argv[2], &error_number);
 	}
 	print_rmnet_api_status(return_code, error_number);
 	rmnetctl_cleanup(handle);

rmnetctl/inc/librmnetctl.h

@@ -2,7 +2,7 @@
 
 			  L I B R M N E T C T L . H
 
-Copyright (c) 2013, The Linux Foundation. All rights reserved.
+Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
@@ -294,6 +294,25 @@ int rmnet_set_logical_ep_config(rmnetctl_hndl_t *hndl,
 				uint16_t *error_code);
 
 /*!
+* @brief Public API to un-set the logical endpoint configuration for a
+* particular link.
+* @details Message type is RMNET_NETLINK_UNSET_LOGICAL_EP_CONFIG.
+* @param *rmnetctl_hndl_t_val RmNet handle for the Netlink message
+* @param logical_ep_id Logical end point id on which the configuration is to be
+* un-set
+* @param dev_name Device on which to un-set the logical end point configuration
+* @param error_code Status code of this operation returned from the kernel
+* @return RMNETCTL_SUCCESS if successful
+* @return RMNETCTL_LIB_ERR if there was a library error. Check error_code
+* @return RMNETCTL_KERNEL_ERR if there was an error in the kernel.
+* Check error_code
+* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
+*/
+int rmnet_unset_logical_ep_config(rmnetctl_hndl_t *hndl,
+				  int32_t ep_id,
+				  const char *dev_name,
+				  uint16_t *error_code);
+/*!
 * @brief Public API to get the logical endpoint configuration for a
 * particular link.
 * @details Message type is RMNET_NETLINK_GET_LOGICAL_EP_CONFIG.

rmnetctl/src/librmnetctl.c

@@ -2,7 +2,7 @@
 
 			L I B R M N E T C T L . C
 
-Copyright (c) 2013, The Linux Foundation. All rights reserved.
+Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
@@ -616,6 +616,44 @@ int rmnet_set_logical_ep_config(rmnetctl_hndl_t *hndl,
 	return return_code;
 }
 
+int rmnet_unset_logical_ep_config(rmnetctl_hndl_t *hndl,
+				  int32_t ep_id,
+				  const char *dev_name,
+				  uint16_t *error_code) {
+	struct rmnet_nl_msg_s request, response;
+	int str_len = -1, return_code = RMNETCTL_LIB_ERR;
+	do {
+
+	if ((!hndl) || ((ep_id < -1) || (ep_id > 31)) || (!error_code) ||
+		_rmnetctl_check_dev_name(dev_name)) {
+		return_code = RMNETCTL_INVALID_ARG;
+		break;
+	}
+
+	request.message_type = RMNET_NETLINK_UNSET_LOGICAL_EP_CONFIG;
+
+	request.arg_length = RMNET_MAX_STR_LEN + sizeof(int32_t);
+	str_len = strlcpy((char *)(request.local_ep_config.dev),
+			  dev_name,
+			  RMNET_MAX_STR_LEN);
+
+	if (_rmnetctl_check_len(str_len, error_code) != RMNETCTL_SUCCESS)
+		break;
+
+	request.local_ep_config.ep_id = ep_id;
+
+	if ((*error_code = rmnetctl_transact(hndl, &request, &response))
+		!= RMNETCTL_SUCCESS)
+		break;
+	if (_rmnetctl_check_code(response.crd, error_code) != RMNETCTL_SUCCESS)
+		break;
+
+	return_code = _rmnetctl_set_codes(response.return_code, error_code);
+	} while(0);
+
+	return return_code;
+}
+
 int rmnet_get_logical_ep_config(rmnetctl_hndl_t *hndl,
 				int32_t ep_id,
 				const char *dev_name,