/******************************************************************************

			R M N E T C L I . C

Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.

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modification, are permitted provided that the following conditions are
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	  notice, this list of conditions and the following disclaimer.
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******************************************************************************/

/******************************************************************************

  @file    rmnetcli.c
  @brief   command line interface to expose rmnet control API's

  DESCRIPTION
  File containing implementation of the command line interface to expose the
  rmnet control configuration .

******************************************************************************/

/*===========================================================================
				INCLUDE FILES
===========================================================================*/

#include <sys/socket.h>
#include <stdint.h>
#include <linux/netlink.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include "rmnetcli.h"
#include "librmnetctl.h"

#define RMNET_MAX_STR_LEN  16

#define _RMNETCLI_CHECKNULL(X)		do { if (!X) {                         \
print_rmnet_api_status(RMNETCTL_INVALID_ARG, RMNETCTL_CFG_FAILURE_NO_COMMAND); \
				rmnetctl_cleanup(handle);                      \
				return RMNETCTL_INVALID_ARG;                   \
		} } while (0);
#define _STRTOUI32(X)           (uint32_t)strtoul(X, NULL, 0)
#define _STRTOUI16(X)           (uint16_t)strtoul(X, NULL, 0)
#define _STRTOUI8(X)           (uint8_t)strtoul(X, NULL, 0)
#define _STRTOI32(X)           (int32_t)strtol(X, NULL, 0)

#define _5TABS 		"\n\t\t\t\t\t"
#define _2TABS 		"\n\t\t"

/*!
* @brief Contains a list of error message from CLI
*/
char rmnetcfg_error_code_text
[RMNETCFG_TOTAL_ERR_MSGS][RMNETCTL_ERR_MSG_SIZE] = {
	"Help option Specified",
	"ERROR: No\\Invalid command was specified\n",
	"ERROR: Could not allocate buffer for Egress device\n"
};

/*!
* @brief Method to display the syntax for the commands
* @details Displays the syntax and usage for the commands
* @param void
* @return void
*/
static void rmnet_api_usage(void)
{
	printf("RmNet API Usage:\n\n");
	printf("rmnetcli help                            Displays this help\n");
	printf("\n");
	printf("rmnetcli assocnetdev <dev_name>          Registers the RmNet");
	printf(_5TABS" data driver on a particular");
	printf(_5TABS" device.dev_name cannot");
	printf(_5TABS" be larger than 15");
	printf(_5TABS" characters. Returns");
	printf(_5TABS" the status code.\n\n");
	printf("rmnetcli unassocnetdev <dev_name>        Unregisters the");
	printf(_5TABS" RmNet data driver on a particular");
	printf(_5TABS" device. dev_name cannot");
	printf(_5TABS" be larger than 15");
	printf(_5TABS" characters. Returns");
	printf(_5TABS" the status code.\n\n");
	printf("rmnetcli getnetdevassoc <dev_name>       Get if the RmNet");
	printf(_5TABS" data driver is registered on");
	printf(_5TABS" a particular device.");
	printf(_5TABS" dev_name cannot be");
	printf(_5TABS" larger than 15");
	printf(_5TABS" characters. Returns 1");
	printf(_5TABS" if is registered and");
	printf(_5TABS" 0 if it is not");
	printf(_5TABS" registered\n\n");
	printf("rmnetcli setledf <egress_flags>          Sets the egress data");
	printf(_2TABS" <agg_size>              format for a particular link.");
	printf(_2TABS" <agg_count>             dev_name cannot be larger");
	printf(_2TABS" <dev_name>              than 15 characters.");
	printf(_5TABS" Returns the status code\n\n");
	printf("rmnetcli getledf <dev_name>              Gets the egress data");
	printf(_5TABS" format for a particular link.");
	printf(_5TABS" dev_name cannot be larger");
	printf(_5TABS" than 15. Returns the 4");
	printf(_5TABS" byte unsigned integer");
	printf(_5TABS" egress_flags\n\n");
	printf("rmnetcli setlidf <ingress_flags>         Sets the ingress");
	printf(_2TABS" <tail_spacing>          data format for a particular");
	printf(_2TABS" <dev_name>              link. ingress_flags is 4");
	printf(_5TABS" byte unsigned integer.");
	printf(_5TABS" tail_spacing is a one.");
	printf(_5TABS" byte unsigned integer.");
	printf(_5TABS" dev_name cannot be");
	printf(_5TABS" larger than 15.");
	printf(_5TABS" characters. Returns");
	printf(_5TABS" the status code\n\n");
	printf("rmnetcli getlidf <dev_name>              Gets the ingress");
	printf(_5TABS" data format for a particular");
	printf(_5TABS" link. dev_name cannot be");
	printf(_5TABS" larger than 15. Returns");
	printf(_5TABS" the 4 byte unsigned");
	printf(_5TABS" integer ingress_flags\n\n");
	printf("rmnetcli setlepc <logical_ep_id>         Sets the logical");
	printf(_2TABS" <rmnet_mode>            endpoint configuration for");
	printf(_2TABS" <dev_name>              a particular link.");
	printf(_2TABS" <egress_dev_name>       logical_ep_id are 32bit");
	printf(_5TABS" integers from -1 to 31.");
	printf(_5TABS" rmnet_mode is a 1 byte");
	printf(_5TABS" unsigned integer of");
	printf(_5TABS" value none, vnd or");
	printf(_5TABS" bridged. dev_name");
	printf(_5TABS" and egress_dev_name");
	printf(_5TABS" cannot be larger");
	printf(_5TABS" than 15 characters");
	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 characters");
	printf(_5TABS" Returns the status code\n\n");
	printf("rmnetcli getlepc <logical_ep_id>         Sets the logical");
	printf(_2TABS" <dev_name>              endpoint configuration for a");
	printf(_5TABS" particular link.");
	printf(_5TABS" logical_ep_id are 32bit");
	printf(_5TABS" integers from -1 to 31.");
	printf(_5TABS" Returns the rmnet_mode");
	printf(_5TABS" and egress_dev_name.");
	printf(_5TABS" rmnet_mode is a 1");
	printf(_5TABS" byte unsigned integer");
	printf(_5TABS" of value none, vnd or");
	printf(_5TABS" bridged. dev_name and");
	printf(_5TABS" egress_dev_name cannot be");
	printf(_5TABS" larger than 15 ");
	printf(_5TABS" characters. Returns the");
	printf(_5TABS" status code\n\n");
	printf("rmnetcli newvnd <dev_id>                 Creates a new");
	printf(_5TABS" virtual network device node.");
	printf(_5TABS" dev_id is an int");
	printf(_5TABS" less than 32. Returns");
	printf(_5TABS" the status code\n\n");
	printf("rmnetcli newvndprefix <dev_id> <name_prefix>   Creates");
	printf(_5TABS" virtual network device node.");
	printf(_5TABS" dev_id is an int");
	printf(_5TABS" less than 32. Prefix");
	printf(_5TABS" must be less than");
	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\n\n");
	printf("rmnetcli freevnd <dev_id>              Removes virtual");
	printf(_5TABS" network device node. dev_name");
	printf(_5TABS" cannot be larger than 15.");
	printf(_5TABS" Returns the status code\n\n");
	printf("rmnetcli addvnctcflow <dev_id>            Add a modem flow");
	printf(_2TABS" <mdm_flow_hndl>         handle - tc flow handle");
	printf(_2TABS" <tc_flow_hndl>          mapping for a virtual network");
	printf(_2TABS" device node\n\n");
	printf("rmnetcli delvnctcflow <dev_id>            Delete a modem flow");
	printf(_2TABS" <mdm_flow_hndl>         handle - tc flow handle");
	printf(_2TABS" <tc_flow_hndl>          mapping for a virtual network");
	printf(_2TABS" device node\n\n");
}

static void print_rmnetctl_lib_errors(uint16_t error_number)
{
	if ((error_number > RMNETCTL_API_SUCCESS) &&
		(error_number < RMNETCTL_API_ERR_ENUM_LENGTH)) {
		printf("%s", rmnetctl_error_code_text[error_number]);
	}
	if ((error_number >= RMNETCFG_ERR_NUM_START) &&
	(error_number < RMNETCFG_ERR_NUM_START + RMNETCFG_TOTAL_ERR_MSGS)) {
		printf("%s", rmnetcfg_error_code_text
			[error_number - RMNETCFG_ERR_NUM_START]);
		if ((error_number == RMNETCTL_CFG_SUCCESS_HELP_COMMAND) ||
			(error_number == RMNETCTL_CFG_FAILURE_NO_COMMAND))
			rmnet_api_usage();
	}
}

/*!
* @brief Method to check the error numbers generated from API calls
* @details Displays the error messages based on each error code
* @param error_number Error number returned from the API and the CLI
* @return void
*/
static void print_rmnet_api_status(int return_code, uint16_t error_number)
{
	if (return_code == RMNETCTL_SUCCESS)
		printf("SUCCESS\n");
	else if (return_code == RMNETCTL_LIB_ERR) {
		printf("LIBRARY ");
		print_rmnetctl_lib_errors(error_number);
	} else if (return_code == RMNETCTL_KERNEL_ERR)
		printf("KERNEL %s", rmnetctl_error_code_text[error_number]);
	else if (return_code == RMNETCTL_INVALID_ARG)
		printf("INVALID_ARG\n");
}

/*!
* @brief Method to make the API calls
* @details Checks for each type of parameter and calls the appropriate
* function based on the number of parameters and parameter type
* @param argc Number of arguments which vary based on the commands
* @param argv Value of the arguments which vary based on the commands
* @return RMNETCTL_SUCCESS if successful. Relevant data might be printed
* based on the message type
* @return RMNETCTL_LIB_ERR if there was a library error. Error code will be
* printed
* @return RMNETCTL_KERNEL_ERR if there was a error in the kernel. Error code will be
* printed
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/

static int rmnet_api_call(int argc, char *argv[])
{
	struct rmnetctl_hndl_s *handle = NULL;
	uint16_t error_number = RMNETCTL_CFG_FAILURE_NO_COMMAND;
	int return_code = RMNETCTL_LIB_ERR;
	if ((!argc) || (!*argv)) {
		print_rmnet_api_status(RMNETCTL_LIB_ERR,
		RMNETCTL_CFG_FAILURE_NO_COMMAND);
		return RMNETCTL_LIB_ERR;
	}
	if (!strcmp(*argv, "help")) {
		print_rmnet_api_status(RMNETCTL_LIB_ERR,
		RMNETCTL_CFG_SUCCESS_HELP_COMMAND);
		return RMNETCTL_LIB_ERR;
	}
	return_code = rmnetctl_init(&handle, &error_number);
	if (return_code!= RMNETCTL_SUCCESS) {
		print_rmnet_api_status(return_code, error_number);
		return RMNETCTL_LIB_ERR;
	}
	error_number = RMNETCTL_CFG_FAILURE_NO_COMMAND;
	return_code = RMNETCTL_LIB_ERR;
	if (!strcmp(*argv, "assocnetdev")) {
		return_code = rmnet_associate_network_device(handle,
		argv[1], &error_number, RMNETCTL_DEVICE_ASSOCIATE);
	} else if (!strcmp(*argv, "unassocnetdev")) {
		return_code = rmnet_associate_network_device(handle,
		argv[1], &error_number, RMNETCTL_DEVICE_UNASSOCIATE);
	} else if (!strcmp(*argv, "getnetdevassoc")) {
		int register_status;
		return_code = rmnet_get_network_device_associated(handle,
		argv[1], &register_status, &error_number);
		if (return_code == RMNETCTL_SUCCESS)
			printf("register_status is %d\n", register_status);
	} else if (!strcmp(*argv, "getledf")) {
		uint32_t egress_flags;
		uint16_t agg_size, agg_count;
		return_code = rmnet_get_link_egress_data_format(handle,
		argv[1], &egress_flags, &agg_size, &agg_count, &error_number);
		if (return_code == RMNETCTL_SUCCESS) {
			printf("egress_flags is %u\n", egress_flags);
			printf("agg_size is %u\n", agg_size);
			printf("agg_count is %u\n", agg_count);
		}
	} else if (!strcmp(*argv, "getlidf")) {
		uint32_t ingress_flags;
		uint8_t  tail_spacing;
		return_code = rmnet_get_link_ingress_data_format_tailspace(
		handle, argv[1], &ingress_flags, &tail_spacing, &error_number);
		if (return_code == RMNETCTL_SUCCESS) {
			printf("ingress_flags is %u\n", ingress_flags);
			printf("tail_spacing is %u\n", tail_spacing);
		}
	} else if (!strcmp(*argv, "newvndprefix")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		_RMNETCLI_CHECKNULL(argv[2]);
		return_code = rmnet_new_vnd_prefix(handle,
		_STRTOUI32(argv[1]), &error_number, RMNETCTL_NEW_VND, argv[2]);
	} else if (!strcmp(*argv, "newvnd")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		return_code = rmnet_new_vnd(handle,
		_STRTOUI32(argv[1]), &error_number, RMNETCTL_NEW_VND);
	} else if (!strcmp(*argv, "getvndname")) {
		char buffer[32];
		memset(buffer, 0, 32);
		_RMNETCLI_CHECKNULL(argv[1]);
		return_code = rmnet_get_vnd_name(handle, _STRTOUI32(argv[1]),
			           &error_number, buffer, 32);
		if (return_code == RMNETCTL_SUCCESS) {
			printf("VND name: %s\n", buffer);
		}
	} else if (!strcmp(*argv, "freevnd")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		return_code = rmnet_new_vnd(handle,
		_STRTOUI32(argv[1]), &error_number, RMNETCTL_FREE_VND);
	} else if (!strcmp(*argv, "setlidf")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		_RMNETCLI_CHECKNULL(argv[2]);
		_RMNETCLI_CHECKNULL(argv[3]);
		return_code = rmnet_set_link_ingress_data_format_tailspace(
		handle, _STRTOUI32(argv[1]), _STRTOUI8(argv[2]), argv[3],
		&error_number);
	} else if (!strcmp(*argv, "delvnctcflow")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		_RMNETCLI_CHECKNULL(argv[2]);
		_RMNETCLI_CHECKNULL(argv[3]);
		return_code = rmnet_add_del_vnd_tc_flow(handle,
		_STRTOUI32(argv[1]), _STRTOUI32(argv[2]), _STRTOUI32(argv[3]),
		RMNETCTL_DEL_FLOW, &error_number);
	} else if (!strcmp(*argv, "getlepc")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		uint8_t rmnet_mode;
		char *egress_dev_name;
		egress_dev_name = NULL;
		egress_dev_name = (char *)malloc(RMNET_MAX_STR_LEN
		* sizeof(char));
		if (!egress_dev_name) {
			print_rmnet_api_status(RMNETCTL_LIB_ERR,
			RMNETCTL_CFG_FAILURE_EGRESS_DEV_NAME_NULL);
			rmnetctl_cleanup(handle);
			return RMNETCTL_LIB_ERR;
		}
		return_code = rmnet_get_logical_ep_config(handle,
		_STRTOI32(argv[1]), argv[2], &rmnet_mode,
		&egress_dev_name, RMNET_MAX_STR_LEN, &error_number);
		if (return_code == RMNETCTL_SUCCESS) {
			printf("rmnet_mode is %u\n", rmnet_mode);
			printf("egress_dev_name is %s\n", egress_dev_name);
		}
		free(egress_dev_name);
	} else if (!strcmp(*argv, "addvnctcflow")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		_RMNETCLI_CHECKNULL(argv[2]);
		_RMNETCLI_CHECKNULL(argv[3]);
		return_code = rmnet_add_del_vnd_tc_flow(handle,
		_STRTOUI32(argv[1]), _STRTOUI32(argv[2]), _STRTOUI32(argv[3]),
		RMNETCTL_ADD_FLOW, &error_number);
	} else if (!strcmp(*argv, "setledf")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		_RMNETCLI_CHECKNULL(argv[2]);
		_RMNETCLI_CHECKNULL(argv[3]);
		return_code = rmnet_set_link_egress_data_format(handle,
		_STRTOUI32(argv[1]), _STRTOUI16(argv[2]), _STRTOUI16(argv[3]),
		argv[4], &error_number);
	} else if (!strcmp(*argv, "setlepc")) {
		_RMNETCLI_CHECKNULL(argv[1]);
		_RMNETCLI_CHECKNULL(argv[2]);
		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);
	return return_code;
}

/*!
* @brief Method which serves as en entry point to the rmnetcli function
* @details Entry point for the RmNet Netlink API. This is the command line
* interface for the RmNet API
* @param argc Number of arguments which vary based on the commands
* @param argv Value of the arguments which vary based on the commands
* @return RMNETCTL_SUCCESS if successful. Relevant data might be printed
* based on the message type
* @return RMNETCTL_LIB_ERR if there was a library error. Error code will be
* printed
* @return RMNETCTL_KERNEL_ERR if there was a error in the kernel. Error code will be
* printed
* @return RMNETCTL_INVALID_ARG if invalid arguments were passed to the API
*/
int main(int argc, char *argv[])
{
	argc--;
	argv++;
	return rmnet_api_call(argc, argv);
}