[mirror_iproute2.git] / ip / iplink_can.c

/*
 * iplink_can.c	CAN device support
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Wolfgang Grandegger <wg@grandegger.com>
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <linux/can/netlink.h>

#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"

static void print_usage(FILE *f)
{
	fprintf(f,
		"Usage: ip link set DEVICE type can\n"
		"\t[ bitrate BITRATE [ sample-point SAMPLE-POINT] ] |\n"
		"\t[ tq TQ prop-seg PROP_SEG phase-seg1 PHASE-SEG1\n \t  phase-seg2 PHASE-SEG2 [ sjw SJW ] ]\n"
		"\n"
		"\t[ dbitrate BITRATE [ dsample-point SAMPLE-POINT] ] |\n"
		"\t[ dtq TQ dprop-seg PROP_SEG dphase-seg1 PHASE-SEG1\n \t  dphase-seg2 PHASE-SEG2 [ dsjw SJW ] ]\n"
		"\n"
		"\t[ loopback { on | off } ]\n"
		"\t[ listen-only { on | off } ]\n"
		"\t[ triple-sampling { on | off } ]\n"
		"\t[ one-shot { on | off } ]\n"
		"\t[ berr-reporting { on | off } ]\n"
		"\t[ fd { on | off } ]\n"
		"\t[ fd-non-iso { on | off } ]\n"
		"\t[ presume-ack { on | off } ]\n"
		"\n"
		"\t[ restart-ms TIME-MS ]\n"
		"\t[ restart ]\n"
		"\n"
		"\t[ termination { 0..65535 } ]\n"
		"\n"
		"\tWhere: BITRATE	:= { 1..1000000 }\n"
		"\t	  SAMPLE-POINT	:= { 0.000..0.999 }\n"
		"\t	  TQ		:= { NUMBER }\n"
		"\t	  PROP-SEG	:= { 1..8 }\n"
		"\t	  PHASE-SEG1	:= { 1..8 }\n"
		"\t	  PHASE-SEG2	:= { 1..8 }\n"
		"\t	  SJW		:= { 1..4 }\n"
		"\t	  RESTART-MS	:= { 0 | NUMBER }\n"
		);
}

static void usage(void)
{
	print_usage(stderr);
}

static int get_float(float *val, const char *arg)
{
	float res;
	char *ptr;

	if (!arg || !*arg)
		return -1;
	res = strtof(arg, &ptr);
	if (!ptr || ptr == arg || *ptr)
		return -1;
	*val = res;
	return 0;
}

static void set_ctrlmode(char *name, char *arg,
			 struct can_ctrlmode *cm, __u32 flags)
{
	if (strcmp(arg, "on") == 0) {
		cm->flags |= flags;
	} else if (strcmp(arg, "off") != 0) {
		fprintf(stderr,
			"Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
			name, arg);
		exit(-1);
	}
	cm->mask |= flags;
}

static void print_ctrlmode(FILE *f, __u32 cm)
{
	open_json_array(PRINT_ANY, is_json_context() ? "ctrlmode" : "<");
#define _PF(cmflag, cmname)						\
	if (cm & cmflag) {						\
		cm &= ~cmflag;						\
		print_string(PRINT_ANY, NULL, cm ? "%s," : "%s", cmname); \
	}
	_PF(CAN_CTRLMODE_LOOPBACK, "LOOPBACK");
	_PF(CAN_CTRLMODE_LISTENONLY, "LISTEN-ONLY");
	_PF(CAN_CTRLMODE_3_SAMPLES, "TRIPLE-SAMPLING");
	_PF(CAN_CTRLMODE_ONE_SHOT, "ONE-SHOT");
	_PF(CAN_CTRLMODE_BERR_REPORTING, "BERR-REPORTING");
	_PF(CAN_CTRLMODE_FD, "FD");
	_PF(CAN_CTRLMODE_FD_NON_ISO, "FD-NON-ISO");
	_PF(CAN_CTRLMODE_PRESUME_ACK, "PRESUME-ACK");
#undef _PF
	if (cm)
		print_hex(PRINT_ANY, NULL, "%x", cm);
	close_json_array(PRINT_ANY, "> ");
}

static int can_parse_opt(struct link_util *lu, int argc, char **argv,
			 struct nlmsghdr *n)
{
	struct can_bittiming bt = {}, dbt = {};
	struct can_ctrlmode cm = {0, 0};

	while (argc > 0) {
		if (matches(*argv, "bitrate") == 0) {
			NEXT_ARG();
			if (get_u32(&bt.bitrate, *argv, 0))
				invarg("invalid \"bitrate\" value\n", *argv);
		} else if (matches(*argv, "sample-point") == 0) {
			float sp;

			NEXT_ARG();
			if (get_float(&sp, *argv))
				invarg("invalid \"sample-point\" value\n",
				       *argv);
			bt.sample_point = (__u32)(sp * 1000);
		} else if (matches(*argv, "tq") == 0) {
			NEXT_ARG();
			if (get_u32(&bt.tq, *argv, 0))
				invarg("invalid \"tq\" value\n", *argv);
		} else if (matches(*argv, "prop-seg") == 0) {
			NEXT_ARG();
			if (get_u32(&bt.prop_seg, *argv, 0))
				invarg("invalid \"prop-seg\" value\n", *argv);
		} else if (matches(*argv, "phase-seg1") == 0) {
			NEXT_ARG();
			if (get_u32(&bt.phase_seg1, *argv, 0))
				invarg("invalid \"phase-seg1\" value\n", *argv);
		} else if (matches(*argv, "phase-seg2") == 0) {
			NEXT_ARG();
			if (get_u32(&bt.phase_seg2, *argv, 0))
				invarg("invalid \"phase-seg2\" value\n", *argv);
		} else if (matches(*argv, "sjw") == 0) {
			NEXT_ARG();
			if (get_u32(&bt.sjw, *argv, 0))
				invarg("invalid \"sjw\" value\n", *argv);
		} else if (matches(*argv, "dbitrate") == 0) {
			NEXT_ARG();
			if (get_u32(&dbt.bitrate, *argv, 0))
				invarg("invalid \"dbitrate\" value\n", *argv);
		} else if (matches(*argv, "dsample-point") == 0) {
			float sp;

			NEXT_ARG();
			if (get_float(&sp, *argv))
				invarg("invalid \"dsample-point\" value\n", *argv);
			dbt.sample_point = (__u32)(sp * 1000);
		} else if (matches(*argv, "dtq") == 0) {
			NEXT_ARG();
			if (get_u32(&dbt.tq, *argv, 0))
				invarg("invalid \"dtq\" value\n", *argv);
		} else if (matches(*argv, "dprop-seg") == 0) {
			NEXT_ARG();
			if (get_u32(&dbt.prop_seg, *argv, 0))
				invarg("invalid \"dprop-seg\" value\n", *argv);
		} else if (matches(*argv, "dphase-seg1") == 0) {
			NEXT_ARG();
			if (get_u32(&dbt.phase_seg1, *argv, 0))
				invarg("invalid \"dphase-seg1\" value\n", *argv);
		} else if (matches(*argv, "dphase-seg2") == 0) {
			NEXT_ARG();
			if (get_u32(&dbt.phase_seg2, *argv, 0))
				invarg("invalid \"dphase-seg2\" value\n", *argv);
		} else if (matches(*argv, "dsjw") == 0) {
			NEXT_ARG();
			if (get_u32(&dbt.sjw, *argv, 0))
				invarg("invalid \"dsjw\" value\n", *argv);
		} else if (matches(*argv, "loopback") == 0) {
			NEXT_ARG();
			set_ctrlmode("loopback", *argv, &cm,
				     CAN_CTRLMODE_LOOPBACK);
		} else if (matches(*argv, "listen-only") == 0) {
			NEXT_ARG();
			set_ctrlmode("listen-only", *argv, &cm,
				     CAN_CTRLMODE_LISTENONLY);
		} else if (matches(*argv, "triple-sampling") == 0) {
			NEXT_ARG();
			set_ctrlmode("triple-sampling", *argv, &cm,
				     CAN_CTRLMODE_3_SAMPLES);
		} else if (matches(*argv, "one-shot") == 0) {
			NEXT_ARG();
			set_ctrlmode("one-shot", *argv, &cm,
				     CAN_CTRLMODE_ONE_SHOT);
		} else if (matches(*argv, "berr-reporting") == 0) {
			NEXT_ARG();
			set_ctrlmode("berr-reporting", *argv, &cm,
				     CAN_CTRLMODE_BERR_REPORTING);
		} else if (matches(*argv, "fd") == 0) {
			NEXT_ARG();
			set_ctrlmode("fd", *argv, &cm,
				     CAN_CTRLMODE_FD);
		} else if (matches(*argv, "fd-non-iso") == 0) {
			NEXT_ARG();
			set_ctrlmode("fd-non-iso", *argv, &cm,
				     CAN_CTRLMODE_FD_NON_ISO);
		} else if (matches(*argv, "presume-ack") == 0) {
			NEXT_ARG();
			set_ctrlmode("presume-ack", *argv, &cm,
				     CAN_CTRLMODE_PRESUME_ACK);
		} else if (matches(*argv, "restart") == 0) {
			__u32 val = 1;

			addattr32(n, 1024, IFLA_CAN_RESTART, val);
		} else if (matches(*argv, "restart-ms") == 0) {
			__u32 val;

			NEXT_ARG();
			if (get_u32(&val, *argv, 0))
				invarg("invalid \"restart-ms\" value\n", *argv);
			addattr32(n, 1024, IFLA_CAN_RESTART_MS, val);
		} else if (matches(*argv, "termination") == 0) {
			__u16 val;

			NEXT_ARG();
			if (get_u16(&val, *argv, 0))
				invarg("invalid \"termination\" value\n",
				       *argv);
			addattr16(n, 1024, IFLA_CAN_TERMINATION, val);
		} else if (matches(*argv, "help") == 0) {
			usage();
			return -1;
		} else {
			fprintf(stderr, "can: unknown option \"%s\"\n", *argv);
			usage();
			return -1;
		}
		argc--, argv++;
	}

	if (bt.bitrate || bt.tq)
		addattr_l(n, 1024, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
	if (dbt.bitrate || dbt.tq)
		addattr_l(n, 1024, IFLA_CAN_DATA_BITTIMING, &dbt, sizeof(dbt));
	if (cm.mask)
		addattr_l(n, 1024, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));

	return 0;
}

static const char *can_state_names[CAN_STATE_MAX] = {
	[CAN_STATE_ERROR_ACTIVE] = "ERROR-ACTIVE",
	[CAN_STATE_ERROR_WARNING] = "ERROR-WARNING",
	[CAN_STATE_ERROR_PASSIVE] = "ERROR-PASSIVE",
	[CAN_STATE_BUS_OFF] = "BUS-OFF",
	[CAN_STATE_STOPPED] = "STOPPED",
	[CAN_STATE_SLEEPING] = "SLEEPING"
};

static void can_print_json_timing_min_max(const char *attr, int min, int max)
{
	open_json_object(attr);
	print_int(PRINT_JSON, "min", NULL, min);
	print_int(PRINT_JSON, "max", NULL, max);
	close_json_object();
}

static void can_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	if (!tb)
		return;

	if (tb[IFLA_CAN_CTRLMODE]) {
		struct can_ctrlmode *cm = RTA_DATA(tb[IFLA_CAN_CTRLMODE]);

		if (cm->flags)
			print_ctrlmode(f, cm->flags);
	}

	if (tb[IFLA_CAN_STATE]) {
		uint32_t state = rta_getattr_u32(tb[IFLA_CAN_STATE]);

		fprintf(f, "state %s ", state < CAN_STATE_MAX ?
			can_state_names[state] : "UNKNOWN");
	}

	if (tb[IFLA_CAN_BERR_COUNTER]) {
		struct can_berr_counter *bc =
			RTA_DATA(tb[IFLA_CAN_BERR_COUNTER]);

		if (is_json_context()) {
			open_json_object("berr_counter");
			print_int(PRINT_JSON, "tx", NULL, bc->txerr);
			print_int(PRINT_JSON, "rx", NULL, bc->rxerr);
			close_json_object();
		} else {
			fprintf(f, "(berr-counter tx %d rx %d) ",
				bc->txerr, bc->rxerr);
		}
	}

	if (tb[IFLA_CAN_RESTART_MS]) {
		__u32 *restart_ms = RTA_DATA(tb[IFLA_CAN_RESTART_MS]);

		print_int(PRINT_ANY,
			  "restart_ms",
			  "restart-ms %d ",
			  *restart_ms);
	}

	/* bittiming is irrelevant if fixed bitrate is defined */
	if (tb[IFLA_CAN_BITTIMING] && !tb[IFLA_CAN_BITRATE_CONST]) {
		struct can_bittiming *bt = RTA_DATA(tb[IFLA_CAN_BITTIMING]);

		if (is_json_context()) {
			open_json_object("bittiming");
			print_int(PRINT_ANY, "bitrate", NULL, bt->bitrate);
			jsonw_float_field_fmt(get_json_writer(),
					      "sample_point", "%.3f",
					      (float) bt->sample_point / 1000.);
			print_int(PRINT_ANY, "tq", NULL, bt->tq);
			print_int(PRINT_ANY, "prop_seg", NULL, bt->prop_seg);
			print_int(PRINT_ANY, "phase_seg1",
				  NULL, bt->phase_seg1);
			print_int(PRINT_ANY, "phase_seg2",
				  NULL, bt->phase_seg2);
			print_int(PRINT_ANY, "sjw", NULL, bt->sjw);
			close_json_object();
		} else {
			fprintf(f, "\n	  bitrate %d sample-point %.3f ",
				bt->bitrate, (float) bt->sample_point / 1000.);
			fprintf(f,
				"\n	  tq %d prop-seg %d phase-seg1 %d phase-seg2 %d sjw %d",
				bt->tq, bt->prop_seg,
				bt->phase_seg1, bt->phase_seg2,
				bt->sjw);
		}
	}

	/* bittiming const is irrelevant if fixed bitrate is defined */
	if (tb[IFLA_CAN_BITTIMING_CONST] && !tb[IFLA_CAN_BITRATE_CONST]) {
		struct can_bittiming_const *btc =
			RTA_DATA(tb[IFLA_CAN_BITTIMING_CONST]);

		if (is_json_context()) {
			open_json_object("bittiming_const");
			print_string(PRINT_JSON, "name", NULL, btc->name);
			can_print_json_timing_min_max("tseg1",
						      btc->tseg1_min,
						      btc->tseg1_max);
			can_print_json_timing_min_max("tseg2",
						      btc->tseg2_min,
						      btc->tseg2_max);
			can_print_json_timing_min_max("sjw", 1, btc->sjw_max);
			can_print_json_timing_min_max("brp",
						      btc->brp_min,
						      btc->brp_max);
			print_int(PRINT_JSON, "brp_inc", NULL, btc->brp_inc);
			close_json_object();
		} else {
			fprintf(f, "\n	  %s: tseg1 %d..%d tseg2 %d..%d "
				"sjw 1..%d brp %d..%d brp-inc %d",
				btc->name, btc->tseg1_min, btc->tseg1_max,
				btc->tseg2_min, btc->tseg2_max, btc->sjw_max,
				btc->brp_min, btc->brp_max, btc->brp_inc);
		}
	}

	if (tb[IFLA_CAN_BITRATE_CONST]) {
		__u32 *bitrate_const = RTA_DATA(tb[IFLA_CAN_BITRATE_CONST]);
		int bitrate_cnt = RTA_PAYLOAD(tb[IFLA_CAN_BITRATE_CONST]) /
			sizeof(*bitrate_const);
		int i;
		__u32 bitrate = 0;

		if (tb[IFLA_CAN_BITTIMING]) {
			struct can_bittiming *bt =
				RTA_DATA(tb[IFLA_CAN_BITTIMING]);
			bitrate = bt->bitrate;
		}

		if (is_json_context()) {
			print_uint(PRINT_JSON,
				   "bittiming_bitrate",
				   NULL, bitrate);
			open_json_array(PRINT_JSON, "bitrate_const");
			for (i = 0; i < bitrate_cnt; ++i)
				print_uint(PRINT_JSON, NULL, NULL,
					   bitrate_const[i]);
			close_json_array(PRINT_JSON, NULL);
		} else {
			fprintf(f, "\n	  bitrate %u", bitrate);
			fprintf(f, "\n	     [");

			for (i = 0; i < bitrate_cnt - 1; ++i) {
				/* This will keep lines below 80 signs */
				if (!(i % 6) && i)
					fprintf(f, "\n	      ");

				fprintf(f, "%8u, ", bitrate_const[i]);
			}

			if (!(i % 6) && i)
				fprintf(f, "\n	      ");
			fprintf(f, "%8u ]", bitrate_const[i]);
		}
	}

	/* data bittiming is irrelevant if fixed bitrate is defined */
	if (tb[IFLA_CAN_DATA_BITTIMING] && !tb[IFLA_CAN_DATA_BITRATE_CONST]) {
		struct can_bittiming *dbt =
			RTA_DATA(tb[IFLA_CAN_DATA_BITTIMING]);

		if (is_json_context()) {
			open_json_object("data_bittiming");
			print_int(PRINT_JSON, "bitrate", NULL, dbt->bitrate);
			jsonw_float_field_fmt(get_json_writer(),
					      "sample_point",
					      "%.3f",
					      (float) dbt->sample_point / 1000.);
			print_int(PRINT_JSON, "tq", NULL, dbt->tq);
			print_int(PRINT_JSON, "prop_seg", NULL, dbt->prop_seg);
			print_int(PRINT_JSON, "phase_seg1",
				  NULL, dbt->phase_seg1);
			print_int(PRINT_JSON, "phase_seg2",
				  NULL, dbt->phase_seg2);
			print_int(PRINT_JSON, "sjw", NULL, dbt->sjw);
			close_json_object();
		} else {
			fprintf(f, "\n	  dbitrate %d dsample-point %.3f ",
				dbt->bitrate,
				(float) dbt->sample_point / 1000.);
			fprintf(f, "\n	  dtq %d dprop-seg %d dphase-seg1 %d "
				"dphase-seg2 %d dsjw %d",
				dbt->tq, dbt->prop_seg, dbt->phase_seg1,
				dbt->phase_seg2, dbt->sjw);
		}
	}

	/* data bittiming const is irrelevant if fixed bitrate is defined */
	if (tb[IFLA_CAN_DATA_BITTIMING_CONST] &&
	    !tb[IFLA_CAN_DATA_BITRATE_CONST]) {
		struct can_bittiming_const *dbtc =
			RTA_DATA(tb[IFLA_CAN_DATA_BITTIMING_CONST]);

		if (is_json_context()) {
			open_json_object("data_bittiming_const");
			print_string(PRINT_JSON, "name", NULL, dbtc->name);
			can_print_json_timing_min_max("tseg1",
						      dbtc->tseg1_min,
						      dbtc->tseg1_max);
			can_print_json_timing_min_max("tseg2",
						      dbtc->tseg2_min,
						      dbtc->tseg2_max);
			can_print_json_timing_min_max("sjw", 1, dbtc->sjw_max);
			can_print_json_timing_min_max("brp",
						      dbtc->brp_min,
						      dbtc->brp_max);

			print_int(PRINT_JSON, "brp_inc", NULL, dbtc->brp_inc);
			close_json_object();
		} else {
			fprintf(f, "\n	  %s: dtseg1 %d..%d dtseg2 %d..%d "
				"dsjw 1..%d dbrp %d..%d dbrp-inc %d",
				dbtc->name, dbtc->tseg1_min, dbtc->tseg1_max,
				dbtc->tseg2_min, dbtc->tseg2_max, dbtc->sjw_max,
				dbtc->brp_min, dbtc->brp_max, dbtc->brp_inc);
		}
	}

	if (tb[IFLA_CAN_DATA_BITRATE_CONST]) {
		__u32 *dbitrate_const =
			RTA_DATA(tb[IFLA_CAN_DATA_BITRATE_CONST]);
		int dbitrate_cnt =
			RTA_PAYLOAD(tb[IFLA_CAN_DATA_BITRATE_CONST]) /
			sizeof(*dbitrate_const);
		int i;
		__u32 dbitrate = 0;

		if (tb[IFLA_CAN_DATA_BITTIMING]) {
			struct can_bittiming *dbt =
				RTA_DATA(tb[IFLA_CAN_DATA_BITTIMING]);
			dbitrate = dbt->bitrate;
		}

		if (is_json_context()) {
			print_uint(PRINT_JSON, "data_bittiming_bitrate",
				   NULL, dbitrate);
			open_json_array(PRINT_JSON, "data_bitrate_const");
			for (i = 0; i < dbitrate_cnt; ++i)
				print_uint(PRINT_JSON, NULL, NULL,
					   dbitrate_const[i]);
			close_json_array(PRINT_JSON, NULL);
		} else {
			fprintf(f, "\n	  dbitrate %u", dbitrate);
			fprintf(f, "\n	     [");

			for (i = 0; i < dbitrate_cnt - 1; ++i) {
				/* This will keep lines below 80 signs */
				if (!(i % 6) && i)
					fprintf(f, "\n	      ");

				fprintf(f, "%8u, ", dbitrate_const[i]);
			}

			if (!(i % 6) && i)
				fprintf(f, "\n	      ");
			fprintf(f, "%8u ]", dbitrate_const[i]);
		}
	}

	if (tb[IFLA_CAN_TERMINATION_CONST] && tb[IFLA_CAN_TERMINATION]) {
		__u16 *trm = RTA_DATA(tb[IFLA_CAN_TERMINATION]);
		__u16 *trm_const = RTA_DATA(tb[IFLA_CAN_TERMINATION_CONST]);
		int trm_cnt = RTA_PAYLOAD(tb[IFLA_CAN_TERMINATION_CONST]) /
			sizeof(*trm_const);
		int i;

		if (is_json_context()) {
			print_hu(PRINT_JSON, "termination", NULL, *trm);
			open_json_array(PRINT_JSON, "termination_const");
			for (i = 0; i < trm_cnt; ++i)
				print_hu(PRINT_JSON, NULL, NULL, trm_const[i]);
			close_json_array(PRINT_JSON, NULL);
		} else {
			fprintf(f, "\n	  termination %hu [ ", *trm);

			for (i = 0; i < trm_cnt - 1; ++i)
				fprintf(f, "%hu, ", trm_const[i]);

			fprintf(f, "%hu ]", trm_const[i]);
		}
	}

	if (tb[IFLA_CAN_CLOCK]) {
		struct can_clock *clock = RTA_DATA(tb[IFLA_CAN_CLOCK]);

		print_int(PRINT_ANY,
			  "clock",
			  "\n	  clock %d",
			  clock->freq);
	}

}

static void can_print_xstats(struct link_util *lu,
			     FILE *f, struct rtattr *xstats)
{
	struct can_device_stats *stats;

	if (xstats && RTA_PAYLOAD(xstats) == sizeof(*stats)) {
		stats = RTA_DATA(xstats);

		if (is_json_context()) {
			print_int(PRINT_JSON, "restarts",
				  NULL, stats->restarts);
			print_int(PRINT_JSON, "bus_error",
				  NULL, stats->bus_error);
			print_int(PRINT_JSON, "arbitration_lost",
				  NULL, stats->arbitration_lost);
			print_int(PRINT_JSON, "error_warning",
				  NULL, stats->error_warning);
			print_int(PRINT_JSON, "error_passive",
				  NULL, stats->error_passive);
			print_int(PRINT_JSON, "bus_off", NULL, stats->bus_off);
		} else {
			fprintf(f, "\n	  re-started bus-errors arbit-lost "
				"error-warn error-pass bus-off");
			fprintf(f, "\n	  %-10d %-10d %-10d %-10d %-10d %-10d",
				stats->restarts, stats->bus_error,
				stats->arbitration_lost, stats->error_warning,
				stats->error_passive, stats->bus_off);
		}
	}
}

static void can_print_help(struct link_util *lu, int argc, char **argv,
			   FILE *f)
{
	print_usage(f);
}

struct link_util can_link_util = {
	.id		= "can",
	.maxattr	= IFLA_CAN_MAX,
	.parse_opt	= can_parse_opt,
	.print_opt	= can_print_opt,
	.print_xstats	= can_print_xstats,
	.print_help	= can_print_help,
};
Commit	Line	Data
5a204478 WG	1	/*
	2	* iplink_can.c CAN device support
	3	*
3bbff7df OH	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
5a204478	8	*
3bbff7df	9	* Authors: Wolfgang Grandegger <wg@grandegger.com>
5a204478 WG	10	*/
	11
	12	#include <stdio.h>
	13	#include <stdlib.h>
	14	#include <string.h>
	15
	16	#include <linux/can/netlink.h>
	17
	18	#include "rt_names.h"
	19	#include "utils.h"
	20	#include "ip_common.h"
	21
561e650e	22	static void print_usage(FILE *f)
5a204478	23	{
561e650e	24	fprintf(f,
5a204478	25	"Usage: ip link set DEVICE type can\n"
56f5daac SH	26	"\t[ bitrate BITRATE [ sample-point SAMPLE-POINT] ] \|\n"
56f5daac SH	27	"\t[ tq TQ prop-seg PROP_SEG phase-seg1 PHASE-SEG1\n \t phase-seg2 PHASE-SEG2 [ sjw SJW ] ]\n"
5a204478	28	"\n"
56f5daac SH	29	"\t[ dbitrate BITRATE [ dsample-point SAMPLE-POINT] ] \|\n"
56f5daac SH	30	"\t[ dtq TQ dprop-seg PROP_SEG dphase-seg1 PHASE-SEG1\n \t dphase-seg2 PHASE-SEG2 [ dsjw SJW ] ]\n"
2bfe0470	31	"\n"
3bbff7df OH	32	"\t[ loopback { on \| off } ]\n"
	33	"\t[ listen-only { on \| off } ]\n"
	34	"\t[ triple-sampling { on \| off } ]\n"
	35	"\t[ one-shot { on \| off } ]\n"
	36	"\t[ berr-reporting { on \| off } ]\n"
2bfe0470	37	"\t[ fd { on \| off } ]\n"
82a307e8	38	"\t[ fd-non-iso { on \| off } ]\n"
d26caee7	39	"\t[ presume-ack { on \| off } ]\n"
5a204478	40	"\n"
3bbff7df OH	41	"\t[ restart-ms TIME-MS ]\n"
3bbff7df OH	42	"\t[ restart ]\n"
5a204478	43	"\n"
759fa608 RK	44	"\t[ termination { 0..65535 } ]\n"
759fa608 RK	45	"\n"
3bbff7df OH	46	"\tWhere: BITRATE := { 1..1000000 }\n"
	47	"\t SAMPLE-POINT := { 0.000..0.999 }\n"
	48	"\t TQ := { NUMBER }\n"
	49	"\t PROP-SEG := { 1..8 }\n"
	50	"\t PHASE-SEG1 := { 1..8 }\n"
	51	"\t PHASE-SEG2 := { 1..8 }\n"
	52	"\t SJW := { 1..4 }\n"
	53	"\t RESTART-MS := { 0 \| NUMBER }\n"
5a204478 WG	54	);
	55	}
	56
561e650e	57	static void usage(void)
	58	{
	59	print_usage(stderr);
	60	}
	61
5a204478 WG	62	static int get_float(float val, const char arg)
	63	{
	64	float res;
	65	char *ptr;
	66
	67	if (!arg \|\| !*arg)
	68	return -1;
	69	res = strtof(arg, &ptr);
	70	if (!ptr \|\| ptr == arg \|\| *ptr)
	71	return -1;
	72	*val = res;
	73	return 0;
	74	}
	75
56f5daac	76	static void set_ctrlmode(char name, char arg,
5a204478 WG	77	struct can_ctrlmode *cm, __u32 flags)
	78	{
	79	if (strcmp(arg, "on") == 0) {
	80	cm->flags \|= flags;
	81	} else if (strcmp(arg, "off") != 0) {
	82	fprintf(stderr,
14645ec2 KR	83	"Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n",
14645ec2 KR	84	name, arg);
5a204478 WG	85	exit(-1);
	86	}
	87	cm->mask \|= flags;
	88	}
	89
	90	static void print_ctrlmode(FILE *f, __u32 cm)
	91	{
52922600 JF	92	open_json_array(PRINT_ANY, is_json_context() ? "ctrlmode" : "<");
	93	#define _PF(cmflag, cmname) \
	94	if (cm & cmflag) { \
	95	cm &= ~cmflag; \
	96	print_string(PRINT_ANY, NULL, cm ? "%s," : "%s", cmname); \
5a204478 WG	97	}
	98	_PF(CAN_CTRLMODE_LOOPBACK, "LOOPBACK");
	99	_PF(CAN_CTRLMODE_LISTENONLY, "LISTEN-ONLY");
	100	_PF(CAN_CTRLMODE_3_SAMPLES, "TRIPLE-SAMPLING");
8a517946 WG	101	_PF(CAN_CTRLMODE_ONE_SHOT, "ONE-SHOT");
8a517946 WG	102	_PF(CAN_CTRLMODE_BERR_REPORTING, "BERR-REPORTING");
2bfe0470	103	_PF(CAN_CTRLMODE_FD, "FD");
82a307e8	104	_PF(CAN_CTRLMODE_FD_NON_ISO, "FD-NON-ISO");
d26caee7	105	_PF(CAN_CTRLMODE_PRESUME_ACK, "PRESUME-ACK");
5a204478 WG	106	#undef _PF
5a204478 WG	107	if (cm)
52922600 JF	108	print_hex(PRINT_ANY, NULL, "%x", cm);
52922600 JF	109	close_json_array(PRINT_ANY, "> ");
5a204478 WG	110	}
	111
	112	static int can_parse_opt(struct link_util lu, int argc, char *argv,
	113	struct nlmsghdr *n)
	114	{
d17b136f	115	struct can_bittiming bt = {}, dbt = {};
5a204478 WG	116	struct can_ctrlmode cm = {0, 0};
5a204478 WG	117
5a204478 WG	118	while (argc > 0) {
	119	if (matches(*argv, "bitrate") == 0) {
	120	NEXT_ARG();
	121	if (get_u32(&bt.bitrate, *argv, 0))
	122	invarg("invalid \"bitrate\" value\n", *argv);
	123	} else if (matches(*argv, "sample-point") == 0) {
	124	float sp;
	125
	126	NEXT_ARG();
	127	if (get_float(&sp, *argv))
	128	invarg("invalid \"sample-point\" value\n",
	129	*argv);
	130	bt.sample_point = (__u32)(sp * 1000);
	131	} else if (matches(*argv, "tq") == 0) {
	132	NEXT_ARG();
	133	if (get_u32(&bt.tq, *argv, 0))
	134	invarg("invalid \"tq\" value\n", *argv);
	135	} else if (matches(*argv, "prop-seg") == 0) {
	136	NEXT_ARG();
	137	if (get_u32(&bt.prop_seg, *argv, 0))
	138	invarg("invalid \"prop-seg\" value\n", *argv);
	139	} else if (matches(*argv, "phase-seg1") == 0) {
	140	NEXT_ARG();
	141	if (get_u32(&bt.phase_seg1, *argv, 0))
	142	invarg("invalid \"phase-seg1\" value\n", *argv);
	143	} else if (matches(*argv, "phase-seg2") == 0) {
	144	NEXT_ARG();
	145	if (get_u32(&bt.phase_seg2, *argv, 0))
	146	invarg("invalid \"phase-seg2\" value\n", *argv);
	147	} else if (matches(*argv, "sjw") == 0) {
	148	NEXT_ARG();
	149	if (get_u32(&bt.sjw, *argv, 0))
	150	invarg("invalid \"sjw\" value\n", *argv);
2bfe0470 OH	151	} else if (matches(*argv, "dbitrate") == 0) {
	152	NEXT_ARG();
	153	if (get_u32(&dbt.bitrate, *argv, 0))
	154	invarg("invalid \"dbitrate\" value\n", *argv);
	155	} else if (matches(*argv, "dsample-point") == 0) {
	156	float sp;
	157
	158	NEXT_ARG();
	159	if (get_float(&sp, *argv))
	160	invarg("invalid \"dsample-point\" value\n", *argv);
	161	dbt.sample_point = (__u32)(sp * 1000);
	162	} else if (matches(*argv, "dtq") == 0) {
	163	NEXT_ARG();
	164	if (get_u32(&dbt.tq, *argv, 0))
	165	invarg("invalid \"dtq\" value\n", *argv);
	166	} else if (matches(*argv, "dprop-seg") == 0) {
	167	NEXT_ARG();
	168	if (get_u32(&dbt.prop_seg, *argv, 0))
	169	invarg("invalid \"dprop-seg\" value\n", *argv);
	170	} else if (matches(*argv, "dphase-seg1") == 0) {
	171	NEXT_ARG();
	172	if (get_u32(&dbt.phase_seg1, *argv, 0))
	173	invarg("invalid \"dphase-seg1\" value\n", *argv);
	174	} else if (matches(*argv, "dphase-seg2") == 0) {
	175	NEXT_ARG();
	176	if (get_u32(&dbt.phase_seg2, *argv, 0))
	177	invarg("invalid \"dphase-seg2\" value\n", *argv);
	178	} else if (matches(*argv, "dsjw") == 0) {
	179	NEXT_ARG();
	180	if (get_u32(&dbt.sjw, *argv, 0))
	181	invarg("invalid \"dsjw\" value\n", *argv);
5a204478 WG	182	} else if (matches(*argv, "loopback") == 0) {
	183	NEXT_ARG();
	184	set_ctrlmode("loopback", *argv, &cm,
	185	CAN_CTRLMODE_LOOPBACK);
	186	} else if (matches(*argv, "listen-only") == 0) {
	187	NEXT_ARG();
	188	set_ctrlmode("listen-only", *argv, &cm,
	189	CAN_CTRLMODE_LISTENONLY);
	190	} else if (matches(*argv, "triple-sampling") == 0) {
	191	NEXT_ARG();
	192	set_ctrlmode("triple-sampling", *argv, &cm,
	193	CAN_CTRLMODE_3_SAMPLES);
8a517946 WG	194	} else if (matches(*argv, "one-shot") == 0) {
	195	NEXT_ARG();
	196	set_ctrlmode("one-shot", *argv, &cm,
	197	CAN_CTRLMODE_ONE_SHOT);
	198	} else if (matches(*argv, "berr-reporting") == 0) {
	199	NEXT_ARG();
	200	set_ctrlmode("berr-reporting", *argv, &cm,
	201	CAN_CTRLMODE_BERR_REPORTING);
2bfe0470 OH	202	} else if (matches(*argv, "fd") == 0) {
	203	NEXT_ARG();
	204	set_ctrlmode("fd", *argv, &cm,
	205	CAN_CTRLMODE_FD);
82a307e8 OH	206	} else if (matches(*argv, "fd-non-iso") == 0) {
	207	NEXT_ARG();
	208	set_ctrlmode("fd-non-iso", *argv, &cm,
	209	CAN_CTRLMODE_FD_NON_ISO);
d26caee7 NEB	210	} else if (matches(*argv, "presume-ack") == 0) {
	211	NEXT_ARG();
	212	set_ctrlmode("presume-ack", *argv, &cm,
	213	CAN_CTRLMODE_PRESUME_ACK);
5a204478 WG	214	} else if (matches(*argv, "restart") == 0) {
	215	__u32 val = 1;
	216
	217	addattr32(n, 1024, IFLA_CAN_RESTART, val);
	218	} else if (matches(*argv, "restart-ms") == 0) {
	219	__u32 val;
	220
	221	NEXT_ARG();
	222	if (get_u32(&val, *argv, 0))
	223	invarg("invalid \"restart-ms\" value\n", *argv);
	224	addattr32(n, 1024, IFLA_CAN_RESTART_MS, val);
759fa608 RK	225	} else if (matches(*argv, "termination") == 0) {
	226	__u16 val;
	227
	228	NEXT_ARG();
	229	if (get_u16(&val, *argv, 0))
	230	invarg("invalid \"termination\" value\n",
	231	*argv);
	232	addattr16(n, 1024, IFLA_CAN_TERMINATION, val);
5a204478 WG	233	} else if (matches(*argv, "help") == 0) {
	234	usage();
	235	return -1;
	236	} else {
14645ec2	237	fprintf(stderr, "can: unknown option \"%s\"\n", *argv);
5a204478 WG	238	usage();
	239	return -1;
	240	}
	241	argc--, argv++;
	242	}
	243
	244	if (bt.bitrate \|\| bt.tq)
	245	addattr_l(n, 1024, IFLA_CAN_BITTIMING, &bt, sizeof(bt));
2bfe0470 OH	246	if (dbt.bitrate \|\| dbt.tq)
2bfe0470 OH	247	addattr_l(n, 1024, IFLA_CAN_DATA_BITTIMING, &dbt, sizeof(dbt));
5a204478 WG	248	if (cm.mask)
	249	addattr_l(n, 1024, IFLA_CAN_CTRLMODE, &cm, sizeof(cm));
	250
	251	return 0;
	252	}
	253
258b7c0f	254	static const char *can_state_names[CAN_STATE_MAX] = {
3bbff7df OH	255	[CAN_STATE_ERROR_ACTIVE] = "ERROR-ACTIVE",
	256	[CAN_STATE_ERROR_WARNING] = "ERROR-WARNING",
	257	[CAN_STATE_ERROR_PASSIVE] = "ERROR-PASSIVE",
	258	[CAN_STATE_BUS_OFF] = "BUS-OFF",
	259	[CAN_STATE_STOPPED] = "STOPPED",
	260	[CAN_STATE_SLEEPING] = "SLEEPING"
5a204478 WG	261	};
5a204478 WG	262
52922600 JF	263	static void can_print_json_timing_min_max(const char *attr, int min, int max)
	264	{
	265	open_json_object(attr);
	266	print_int(PRINT_JSON, "min", NULL, min);
	267	print_int(PRINT_JSON, "max", NULL, max);
	268	close_json_object();
	269	}
	270
5a204478 WG	271	static void can_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	272	{
	273	if (!tb)
	274	return;
	275
	276	if (tb[IFLA_CAN_CTRLMODE]) {
	277	struct can_ctrlmode *cm = RTA_DATA(tb[IFLA_CAN_CTRLMODE]);
	278
	279	if (cm->flags)
	280	print_ctrlmode(f, cm->flags);
	281	}
	282
	283	if (tb[IFLA_CAN_STATE]) {
9f1370c0	284	uint32_t state = rta_getattr_u32(tb[IFLA_CAN_STATE]);
5a204478	285
258b7c0f	286	fprintf(f, "state %s ", state < CAN_STATE_MAX ?
9f1370c0	287	can_state_names[state] : "UNKNOWN");
5a204478 WG	288	}
5a204478 WG	289
8a517946 WG	290	if (tb[IFLA_CAN_BERR_COUNTER]) {
	291	struct can_berr_counter *bc =
	292	RTA_DATA(tb[IFLA_CAN_BERR_COUNTER]);
	293
52922600 JF	294	if (is_json_context()) {
	295	open_json_object("berr_counter");
	296	print_int(PRINT_JSON, "tx", NULL, bc->txerr);
	297	print_int(PRINT_JSON, "rx", NULL, bc->rxerr);
	298	close_json_object();
	299	} else {
	300	fprintf(f, "(berr-counter tx %d rx %d) ",
	301	bc->txerr, bc->rxerr);
	302	}
8a517946 WG	303	}
8a517946 WG	304
5a204478 WG	305	if (tb[IFLA_CAN_RESTART_MS]) {
	306	__u32 *restart_ms = RTA_DATA(tb[IFLA_CAN_RESTART_MS]);
	307
52922600 JF	308	print_int(PRINT_ANY,
	309	"restart_ms",
	310	"restart-ms %d ",
	311	*restart_ms);
5a204478 WG	312	}
5a204478 WG	313
759fa608 RK	314	/* bittiming is irrelevant if fixed bitrate is defined */
759fa608 RK	315	if (tb[IFLA_CAN_BITTIMING] && !tb[IFLA_CAN_BITRATE_CONST]) {
5a204478 WG	316	struct can_bittiming *bt = RTA_DATA(tb[IFLA_CAN_BITTIMING]);
5a204478 WG	317
52922600 JF	318	if (is_json_context()) {
	319	open_json_object("bittiming");
	320	print_int(PRINT_ANY, "bitrate", NULL, bt->bitrate);
	321	jsonw_float_field_fmt(get_json_writer(),
	322	"sample_point", "%.3f",
	323	(float) bt->sample_point / 1000.);
	324	print_int(PRINT_ANY, "tq", NULL, bt->tq);
	325	print_int(PRINT_ANY, "prop_seg", NULL, bt->prop_seg);
	326	print_int(PRINT_ANY, "phase_seg1",
	327	NULL, bt->phase_seg1);
	328	print_int(PRINT_ANY, "phase_seg2",
	329	NULL, bt->phase_seg2);
	330	print_int(PRINT_ANY, "sjw", NULL, bt->sjw);
	331	close_json_object();
	332	} else {
	333	fprintf(f, "\n bitrate %d sample-point %.3f ",
	334	bt->bitrate, (float) bt->sample_point / 1000.);
	335	fprintf(f,
	336	"\n tq %d prop-seg %d phase-seg1 %d phase-seg2 %d sjw %d",
	337	bt->tq, bt->prop_seg,
	338	bt->phase_seg1, bt->phase_seg2,
	339	bt->sjw);
	340	}
5a204478 WG	341	}
5a204478 WG	342
759fa608 RK	343	/* bittiming const is irrelevant if fixed bitrate is defined */
759fa608 RK	344	if (tb[IFLA_CAN_BITTIMING_CONST] && !tb[IFLA_CAN_BITRATE_CONST]) {
5a204478 WG	345	struct can_bittiming_const *btc =
	346	RTA_DATA(tb[IFLA_CAN_BITTIMING_CONST]);
	347
52922600 JF	348	if (is_json_context()) {
	349	open_json_object("bittiming_const");
	350	print_string(PRINT_JSON, "name", NULL, btc->name);
	351	can_print_json_timing_min_max("tseg1",
	352	btc->tseg1_min,
	353	btc->tseg1_max);
	354	can_print_json_timing_min_max("tseg2",
	355	btc->tseg2_min,
	356	btc->tseg2_max);
	357	can_print_json_timing_min_max("sjw", 1, btc->sjw_max);
	358	can_print_json_timing_min_max("brp",
	359	btc->brp_min,
	360	btc->brp_max);
	361	print_int(PRINT_JSON, "brp_inc", NULL, btc->brp_inc);
	362	close_json_object();
	363	} else {
	364	fprintf(f, "\n %s: tseg1 %d..%d tseg2 %d..%d "
	365	"sjw 1..%d brp %d..%d brp-inc %d",
	366	btc->name, btc->tseg1_min, btc->tseg1_max,
	367	btc->tseg2_min, btc->tseg2_max, btc->sjw_max,
	368	btc->brp_min, btc->brp_max, btc->brp_inc);
	369	}
5a204478 WG	370	}
5a204478 WG	371
759fa608 RK	372	if (tb[IFLA_CAN_BITRATE_CONST]) {
	373	__u32 *bitrate_const = RTA_DATA(tb[IFLA_CAN_BITRATE_CONST]);
	374	int bitrate_cnt = RTA_PAYLOAD(tb[IFLA_CAN_BITRATE_CONST]) /
52922600	375	sizeof(*bitrate_const);
759fa608 RK	376	int i;
	377	__u32 bitrate = 0;
	378
	379	if (tb[IFLA_CAN_BITTIMING]) {
	380	struct can_bittiming *bt =
52922600	381	RTA_DATA(tb[IFLA_CAN_BITTIMING]);
759fa608 RK	382	bitrate = bt->bitrate;
	383	}
	384
52922600 JF	385	if (is_json_context()) {
	386	print_uint(PRINT_JSON,
	387	"bittiming_bitrate",
	388	NULL, bitrate);
	389	open_json_array(PRINT_JSON, "bitrate_const");
	390	for (i = 0; i < bitrate_cnt; ++i)
	391	print_uint(PRINT_JSON, NULL, NULL,
	392	bitrate_const[i]);
	393	close_json_array(PRINT_JSON, NULL);
	394	} else {
	395	fprintf(f, "\n bitrate %u", bitrate);
	396	fprintf(f, "\n [");
	397
	398	for (i = 0; i < bitrate_cnt - 1; ++i) {
	399	/* This will keep lines below 80 signs */
	400	if (!(i % 6) && i)
	401	fprintf(f, "\n ");
	402
	403	fprintf(f, "%8u, ", bitrate_const[i]);
	404	}
759fa608	405
759fa608 RK	406	if (!(i % 6) && i)
759fa608 RK	407	fprintf(f, "\n ");
52922600	408	fprintf(f, "%8u ]", bitrate_const[i]);
759fa608	409	}
759fa608 RK	410	}
	411
	412	/* data bittiming is irrelevant if fixed bitrate is defined */
	413	if (tb[IFLA_CAN_DATA_BITTIMING] && !tb[IFLA_CAN_DATA_BITRATE_CONST]) {
2bfe0470 OH	414	struct can_bittiming *dbt =
	415	RTA_DATA(tb[IFLA_CAN_DATA_BITTIMING]);
	416
52922600 JF	417	if (is_json_context()) {
	418	open_json_object("data_bittiming");
	419	print_int(PRINT_JSON, "bitrate", NULL, dbt->bitrate);
	420	jsonw_float_field_fmt(get_json_writer(),
	421	"sample_point",
	422	"%.3f",
	423	(float) dbt->sample_point / 1000.);
	424	print_int(PRINT_JSON, "tq", NULL, dbt->tq);
	425	print_int(PRINT_JSON, "prop_seg", NULL, dbt->prop_seg);
	426	print_int(PRINT_JSON, "phase_seg1",
	427	NULL, dbt->phase_seg1);
	428	print_int(PRINT_JSON, "phase_seg2",
	429	NULL, dbt->phase_seg2);
	430	print_int(PRINT_JSON, "sjw", NULL, dbt->sjw);
	431	close_json_object();
	432	} else {
	433	fprintf(f, "\n dbitrate %d dsample-point %.3f ",
	434	dbt->bitrate,
	435	(float) dbt->sample_point / 1000.);
	436	fprintf(f, "\n dtq %d dprop-seg %d dphase-seg1 %d "
	437	"dphase-seg2 %d dsjw %d",
	438	dbt->tq, dbt->prop_seg, dbt->phase_seg1,
	439	dbt->phase_seg2, dbt->sjw);
	440	}
2bfe0470 OH	441	}
2bfe0470 OH	442
759fa608 RK	443	/* data bittiming const is irrelevant if fixed bitrate is defined */
	444	if (tb[IFLA_CAN_DATA_BITTIMING_CONST] &&
	445	!tb[IFLA_CAN_DATA_BITRATE_CONST]) {
2bfe0470 OH	446	struct can_bittiming_const *dbtc =
	447	RTA_DATA(tb[IFLA_CAN_DATA_BITTIMING_CONST]);
	448
52922600 JF	449	if (is_json_context()) {
	450	open_json_object("data_bittiming_const");
	451	print_string(PRINT_JSON, "name", NULL, dbtc->name);
	452	can_print_json_timing_min_max("tseg1",
	453	dbtc->tseg1_min,
	454	dbtc->tseg1_max);
	455	can_print_json_timing_min_max("tseg2",
	456	dbtc->tseg2_min,
	457	dbtc->tseg2_max);
	458	can_print_json_timing_min_max("sjw", 1, dbtc->sjw_max);
	459	can_print_json_timing_min_max("brp",
	460	dbtc->brp_min,
	461	dbtc->brp_max);
	462
	463	print_int(PRINT_JSON, "brp_inc", NULL, dbtc->brp_inc);
	464	close_json_object();
	465	} else {
	466	fprintf(f, "\n %s: dtseg1 %d..%d dtseg2 %d..%d "
	467	"dsjw 1..%d dbrp %d..%d dbrp-inc %d",
	468	dbtc->name, dbtc->tseg1_min, dbtc->tseg1_max,
	469	dbtc->tseg2_min, dbtc->tseg2_max, dbtc->sjw_max,
	470	dbtc->brp_min, dbtc->brp_max, dbtc->brp_inc);
	471	}
2bfe0470 OH	472	}
2bfe0470 OH	473
759fa608 RK	474	if (tb[IFLA_CAN_DATA_BITRATE_CONST]) {
759fa608 RK	475	__u32 *dbitrate_const =
52922600	476	RTA_DATA(tb[IFLA_CAN_DATA_BITRATE_CONST]);
759fa608	477	int dbitrate_cnt =
52922600 JF	478	RTA_PAYLOAD(tb[IFLA_CAN_DATA_BITRATE_CONST]) /
52922600 JF	479	sizeof(*dbitrate_const);
759fa608 RK	480	int i;
	481	__u32 dbitrate = 0;
	482
	483	if (tb[IFLA_CAN_DATA_BITTIMING]) {
	484	struct can_bittiming *dbt =
52922600	485	RTA_DATA(tb[IFLA_CAN_DATA_BITTIMING]);
759fa608 RK	486	dbitrate = dbt->bitrate;
	487	}
	488
52922600 JF	489	if (is_json_context()) {
	490	print_uint(PRINT_JSON, "data_bittiming_bitrate",
	491	NULL, dbitrate);
	492	open_json_array(PRINT_JSON, "data_bitrate_const");
	493	for (i = 0; i < dbitrate_cnt; ++i)
	494	print_uint(PRINT_JSON, NULL, NULL,
	495	dbitrate_const[i]);
	496	close_json_array(PRINT_JSON, NULL);
	497	} else {
	498	fprintf(f, "\n dbitrate %u", dbitrate);
	499	fprintf(f, "\n [");
	500
	501	for (i = 0; i < dbitrate_cnt - 1; ++i) {
	502	/* This will keep lines below 80 signs */
	503	if (!(i % 6) && i)
	504	fprintf(f, "\n ");
	505
	506	fprintf(f, "%8u, ", dbitrate_const[i]);
	507	}
759fa608	508
759fa608 RK	509	if (!(i % 6) && i)
759fa608 RK	510	fprintf(f, "\n ");
52922600	511	fprintf(f, "%8u ]", dbitrate_const[i]);
759fa608	512	}
759fa608 RK	513	}
	514
	515	if (tb[IFLA_CAN_TERMINATION_CONST] && tb[IFLA_CAN_TERMINATION]) {
	516	__u16 *trm = RTA_DATA(tb[IFLA_CAN_TERMINATION]);
	517	__u16 *trm_const = RTA_DATA(tb[IFLA_CAN_TERMINATION_CONST]);
	518	int trm_cnt = RTA_PAYLOAD(tb[IFLA_CAN_TERMINATION_CONST]) /
52922600	519	sizeof(*trm_const);
759fa608 RK	520	int i;
759fa608 RK	521
52922600 JF	522	if (is_json_context()) {
	523	print_hu(PRINT_JSON, "termination", NULL, *trm);
	524	open_json_array(PRINT_JSON, "termination_const");
	525	for (i = 0; i < trm_cnt; ++i)
	526	print_hu(PRINT_JSON, NULL, NULL, trm_const[i]);
	527	close_json_array(PRINT_JSON, NULL);
	528	} else {
	529	fprintf(f, "\n termination %hu [ ", *trm);
759fa608	530
52922600 JF	531	for (i = 0; i < trm_cnt - 1; ++i)
52922600 JF	532	fprintf(f, "%hu, ", trm_const[i]);
759fa608	533
52922600 JF	534	fprintf(f, "%hu ]", trm_const[i]);
52922600 JF	535	}
759fa608 RK	536	}
759fa608 RK	537
5a204478 WG	538	if (tb[IFLA_CAN_CLOCK]) {
	539	struct can_clock *clock = RTA_DATA(tb[IFLA_CAN_CLOCK]);
	540
52922600 JF	541	print_int(PRINT_ANY,
	542	"clock",
	543	"\n clock %d",
	544	clock->freq);
5a204478 WG	545	}
	546
	547	}
	548
	549	static void can_print_xstats(struct link_util *lu,
	550	FILE f, struct rtattr xstats)
	551	{
	552	struct can_device_stats *stats;
	553
	554	if (xstats && RTA_PAYLOAD(xstats) == sizeof(*stats)) {
	555	stats = RTA_DATA(xstats);
52922600 JF	556
	557	if (is_json_context()) {
	558	print_int(PRINT_JSON, "restarts",
	559	NULL, stats->restarts);
	560	print_int(PRINT_JSON, "bus_error",
	561	NULL, stats->bus_error);
	562	print_int(PRINT_JSON, "arbitration_lost",
	563	NULL, stats->arbitration_lost);
	564	print_int(PRINT_JSON, "error_warning",
	565	NULL, stats->error_warning);
	566	print_int(PRINT_JSON, "error_passive",
	567	NULL, stats->error_passive);
	568	print_int(PRINT_JSON, "bus_off", NULL, stats->bus_off);
	569	} else {
	570	fprintf(f, "\n re-started bus-errors arbit-lost "
	571	"error-warn error-pass bus-off");
	572	fprintf(f, "\n %-10d %-10d %-10d %-10d %-10d %-10d",
	573	stats->restarts, stats->bus_error,
	574	stats->arbitration_lost, stats->error_warning,
	575	stats->error_passive, stats->bus_off);
	576	}
5a204478 WG	577	}
	578	}
	579
561e650e	580	static void can_print_help(struct link_util lu, int argc, char *argv,
52922600	581	FILE *f)
561e650e	582	{
	583	print_usage(f);
	584	}
	585
5a204478 WG	586	struct link_util can_link_util = {
	587	.id = "can",
	588	.maxattr = IFLA_CAN_MAX,
	589	.parse_opt = can_parse_opt,
	590	.print_opt = can_print_opt,
4806867a	591	.print_xstats = can_print_xstats,
561e650e	592	.print_help = can_print_help,
5a204478	593	};