[mirror_iproute2.git] / ip / tcp_metrics.c

/*
 * tcp_metrics.c	"ip tcp_metrics/tcpmetrics"
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		version 2 as published by the Free Software Foundation;
 *
 * Authors:	Julian Anastasov <ja@ssi.bg>, August 2012
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <linux/if.h>

#include <linux/genetlink.h>
#include <linux/tcp_metrics.h>

#include "utils.h"
#include "ip_common.h"
#include "libgenl.h"

static void usage(void)
{
	fprintf(stderr,
		"Usage:	ip tcp_metrics/tcpmetrics { COMMAND | help }\n"
		"	ip tcp_metrics { show | flush } SELECTOR\n"
		"	ip tcp_metrics delete [ address ] ADDRESS\n"
		"SELECTOR := [ [ address ] PREFIX ]\n");
	exit(-1);
}

/* netlink socket */
static struct rtnl_handle grth = { .fd = -1 };
static int genl_family = -1;
static const double usec_per_sec = 1000000.;

#define TCPM_REQUEST(_req, _bufsiz, _cmd, _flags) \
	GENL_REQUEST(_req, _bufsiz, genl_family, 0, \
		     TCP_METRICS_GENL_VERSION, _cmd, _flags)

#define CMD_LIST	0x0001	/* list, lst, show		*/
#define CMD_DEL		0x0002	/* delete, remove		*/
#define CMD_FLUSH	0x0004	/* flush			*/

static const struct {
	const char *name;
	int	code;
} cmds[] = {
	{	"list",		CMD_LIST	},
	{	"lst",		CMD_LIST	},
	{	"show",		CMD_LIST	},
	{	"delete",	CMD_DEL		},
	{	"remove",	CMD_DEL		},
	{	"flush",	CMD_FLUSH	},
};

static const char *metric_name[TCP_METRIC_MAX + 1] = {
	[TCP_METRIC_RTT]		= "rtt",
	[TCP_METRIC_RTTVAR]		= "rttvar",
	[TCP_METRIC_SSTHRESH]		= "ssthresh",
	[TCP_METRIC_CWND]		= "cwnd",
	[TCP_METRIC_REORDERING]		= "reordering",
};

static struct {
	int flushed;
	char *flushb;
	int flushp;
	int flushe;
	int cmd;
	inet_prefix daddr;
	inet_prefix saddr;
} f;

static int flush_update(void)
{
	if (rtnl_send_check(&grth, f.flushb, f.flushp) < 0) {
		perror("Failed to send flush request\n");
		return -1;
	}
	f.flushp = 0;
	return 0;
}

static void print_tcp_metrics(struct rtattr *a)
{
	struct rtattr *m[TCP_METRIC_MAX + 1 + 1];
	unsigned long rtt = 0, rttvar = 0;
	int i;

	parse_rtattr_nested(m, TCP_METRIC_MAX + 1, a);

	for (i = 0; i < TCP_METRIC_MAX + 1; i++) {
		const char *name;
		__u32 val;
		SPRINT_BUF(b1);

		a = m[i + 1];
		if (!a)
			continue;

		val = rta_getattr_u32(a);

		switch (i) {
		case TCP_METRIC_RTT:
			if (!rtt)
				rtt = (val * 1000UL) >> 3;
			continue;
		case TCP_METRIC_RTTVAR:
			if (!rttvar)
				rttvar = (val * 1000UL) >> 2;
			continue;
		case TCP_METRIC_RTT_US:
			rtt = val >> 3;
			continue;

		case TCP_METRIC_RTTVAR_US:
			rttvar = val >> 2;
			continue;

		case TCP_METRIC_SSTHRESH:
		case TCP_METRIC_CWND:
		case TCP_METRIC_REORDERING:
			name = metric_name[i];
			break;

		default:
			snprintf(b1, sizeof(b1),
				 " metric_%d ", i);
			name = b1;
		}


		print_uint(PRINT_JSON, name, NULL, val);
		print_string(PRINT_FP, NULL, " %s ", name);
		print_uint(PRINT_FP, NULL, "%u", val);
	}

	if (rtt) {
		print_float(PRINT_JSON, "rtt", NULL,
			    (double)rtt / usec_per_sec);
		print_u64(PRINT_FP, NULL,
			   " rtt %luus", rtt);
	}
	if (rttvar) {
		print_float(PRINT_JSON, "rttvar", NULL,
			    (double) rttvar / usec_per_sec);
		print_u64(PRINT_FP, NULL,
			   " rttvar %luus", rttvar);
	}
}

static int process_msg(struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE *) arg;
	struct genlmsghdr *ghdr;
	struct rtattr *attrs[TCP_METRICS_ATTR_MAX + 1], *a;
	const char *h;
	int len = n->nlmsg_len;
	inet_prefix daddr, saddr;
	int atype, stype;

	if (n->nlmsg_type != genl_family)
		return -1;

	len -= NLMSG_LENGTH(GENL_HDRLEN);
	if (len < 0)
		return -1;

	ghdr = NLMSG_DATA(n);
	if (ghdr->cmd != TCP_METRICS_CMD_GET)
		return 0;

	parse_rtattr(attrs, TCP_METRICS_ATTR_MAX, (void *) ghdr + GENL_HDRLEN,
		     len);

	if (attrs[TCP_METRICS_ATTR_ADDR_IPV4]) {
		if (f.daddr.family && f.daddr.family != AF_INET)
			return 0;
		a = attrs[TCP_METRICS_ATTR_ADDR_IPV4];
		daddr.family = AF_INET;
		atype = TCP_METRICS_ATTR_ADDR_IPV4;
	} else if (attrs[TCP_METRICS_ATTR_ADDR_IPV6]) {
		if (f.daddr.family && f.daddr.family != AF_INET6)
			return 0;
		a = attrs[TCP_METRICS_ATTR_ADDR_IPV6];
		daddr.family = AF_INET6;
		atype = TCP_METRICS_ATTR_ADDR_IPV6;
	} else {
		return 0;
	}

	if (get_addr_rta(&daddr, a, daddr.family))
		return 0;

	if (f.daddr.family && f.daddr.bitlen >= 0 &&
	    inet_addr_match(&daddr, &f.daddr, f.daddr.bitlen))
		return 0;

	if (attrs[TCP_METRICS_ATTR_SADDR_IPV4]) {
		if (f.saddr.family && f.saddr.family != AF_INET)
			return 0;
		a = attrs[TCP_METRICS_ATTR_SADDR_IPV4];
		saddr.family = AF_INET;
		stype = TCP_METRICS_ATTR_SADDR_IPV4;
	} else if (attrs[TCP_METRICS_ATTR_SADDR_IPV6]) {
		if (f.saddr.family && f.saddr.family != AF_INET6)
			return 0;
		a = attrs[TCP_METRICS_ATTR_SADDR_IPV6];
		saddr.family = AF_INET6;
		stype = TCP_METRICS_ATTR_SADDR_IPV6;
	} else {
		saddr.family = AF_UNSPEC;
		stype = 0;
	}

	/* Only get/check for the source-address if the kernel supports it. */
	if (saddr.family) {
		if (get_addr_rta(&saddr, a, saddr.family))
			return 0;

		if (f.saddr.family && f.saddr.bitlen >= 0 &&
		    inet_addr_match(&saddr, &f.saddr, f.saddr.bitlen))
			return 0;
	}

	if (f.flushb) {
		struct nlmsghdr *fn;

		TCPM_REQUEST(req2, 128, TCP_METRICS_CMD_DEL, NLM_F_REQUEST);

		addattr_l(&req2.n, sizeof(req2), atype, daddr.data,
			  daddr.bytelen);
		if (saddr.family)
			addattr_l(&req2.n, sizeof(req2), stype, saddr.data,
				  saddr.bytelen);

		if (NLMSG_ALIGN(f.flushp) + req2.n.nlmsg_len > f.flushe) {
			if (flush_update())
				return -1;
		}
		fn = (struct nlmsghdr *) (f.flushb + NLMSG_ALIGN(f.flushp));
		memcpy(fn, &req2.n, req2.n.nlmsg_len);
		fn->nlmsg_seq = ++grth.seq;
		f.flushp = (((char *) fn) + req2.n.nlmsg_len) - f.flushb;
		f.flushed++;
		if (show_stats < 2)
			return 0;
	}

	open_json_object(NULL);
	if (f.cmd & (CMD_DEL | CMD_FLUSH))
		print_bool(PRINT_ANY, "deleted", "Deleted ", true);

	h = format_host(daddr.family, daddr.bytelen, daddr.data);
	print_color_string(PRINT_ANY,
			   ifa_family_color(daddr.family),
			   "dst", "%s", h);

	a = attrs[TCP_METRICS_ATTR_AGE];
	if (a) {
		__u64 val = rta_getattr_u64(a);
		double age = val / 1000.;

		print_float(PRINT_ANY, "age",
			     " age %.03fsec", age);
	}

	a = attrs[TCP_METRICS_ATTR_TW_TS_STAMP];
	if (a) {
		__s32 val = (__s32) rta_getattr_u32(a);
		__u32 tsval;
		char tw_ts[64];

		a = attrs[TCP_METRICS_ATTR_TW_TSVAL];
		tsval = a ? rta_getattr_u32(a) : 0;
		snprintf(tw_ts, sizeof(tw_ts),
			 "%u/%d", tsval, val);
		print_string(PRINT_ANY, "tw_ts_stamp",
		     " tw_ts %s ago", tw_ts);
	}

	if (attrs[TCP_METRICS_ATTR_VALS])
		print_tcp_metrics(attrs[TCP_METRICS_ATTR_VALS]);

	a = attrs[TCP_METRICS_ATTR_FOPEN_MSS];
	if (a) {
		print_uint(PRINT_ANY, "fopen_miss", " fo_mss %u",
			   rta_getattr_u16(a));
	}

	a = attrs[TCP_METRICS_ATTR_FOPEN_SYN_DROPS];
	if (a) {
		__u16 syn_loss = rta_getattr_u16(a);
		double ts;

		a = attrs[TCP_METRICS_ATTR_FOPEN_SYN_DROP_TS];
		ts = a ? rta_getattr_u64(a) : 0;

		print_uint(PRINT_ANY, "fopen_syn_drops",
			   " fo_syn_drops %u", syn_loss);
		print_float(PRINT_ANY, "fopen_syn_drop_ts",
			     "/%.03fusec ago",
			     ts / 1000000.);
	}

	a = attrs[TCP_METRICS_ATTR_FOPEN_COOKIE];
	if (a) {
		char cookie[32 + 1];
		unsigned char *ptr = RTA_DATA(a);
		int i, max = RTA_PAYLOAD(a);

		if (max > 16)
			max = 16;
		cookie[0] = 0;
		for (i = 0; i < max; i++)
			sprintf(cookie + i + i, "%02x", ptr[i]);

		print_string(PRINT_ANY, "fo_cookie",
			     " fo_cookie %s", cookie);
	}

	if (saddr.family) {
		const char *src;

		src = format_host(saddr.family, saddr.bytelen, saddr.data);
		print_string(PRINT_ANY, "source",
			     " source %s", src);
	}

	print_string(PRINT_FP, NULL, "\n", "");
	close_json_object();
	fflush(fp);
	return 0;
}

static int tcpm_do_cmd(int cmd, int argc, char **argv)
{
	TCPM_REQUEST(req, 1024, TCP_METRICS_CMD_GET, NLM_F_REQUEST);
	struct nlmsghdr *answer;
	int atype = -1, stype = -1;
	int ack;

	memset(&f, 0, sizeof(f));
	f.daddr.bitlen = -1;
	f.daddr.family = preferred_family;
	f.saddr.bitlen = -1;
	f.saddr.family = preferred_family;

	switch (preferred_family) {
	case AF_UNSPEC:
	case AF_INET:
	case AF_INET6:
		break;
	default:
		fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
		return -1;
	}

	for (; argc > 0; argc--, argv++) {
		if (strcmp(*argv, "src") == 0 ||
		    strcmp(*argv, "source") == 0) {
			char *who = *argv;

			NEXT_ARG();
			if (matches(*argv, "help") == 0)
				usage();
			if (f.saddr.bitlen >= 0)
				duparg2(who, *argv);

			get_prefix(&f.saddr, *argv, preferred_family);
			if (f.saddr.bytelen && f.saddr.bytelen * 8 == f.saddr.bitlen) {
				if (f.saddr.family == AF_INET)
					stype = TCP_METRICS_ATTR_SADDR_IPV4;
				else if (f.saddr.family == AF_INET6)
					stype = TCP_METRICS_ATTR_SADDR_IPV6;
			}

			if (stype < 0) {
				fprintf(stderr, "Error: a specific IP address is expected rather than \"%s\"\n",
					*argv);
				return -1;
			}
		} else {
			char *who = "address";

			if (strcmp(*argv, "addr") == 0 ||
			    strcmp(*argv, "address") == 0) {
				who = *argv;
				NEXT_ARG();
			}
			if (matches(*argv, "help") == 0)
				usage();
			if (f.daddr.bitlen >= 0)
				duparg2(who, *argv);

			get_prefix(&f.daddr, *argv, preferred_family);
			if (f.daddr.bytelen && f.daddr.bytelen * 8 == f.daddr.bitlen) {
				if (f.daddr.family == AF_INET)
					atype = TCP_METRICS_ATTR_ADDR_IPV4;
				else if (f.daddr.family == AF_INET6)
					atype = TCP_METRICS_ATTR_ADDR_IPV6;
			}
			if ((CMD_DEL & cmd) && atype < 0) {
				fprintf(stderr, "Error: a specific IP address is expected rather than \"%s\"\n",
					*argv);
				return -1;
			}
		}
		argc--; argv++;
	}

	if (cmd == CMD_DEL && atype < 0)
		missarg("address");

	/* flush for exact address ? Single del */
	if (cmd == CMD_FLUSH && atype >= 0)
		cmd = CMD_DEL;

	/* flush for all addresses ? Single del without address */
	if (cmd == CMD_FLUSH && f.daddr.bitlen <= 0 &&
	    f.saddr.bitlen <= 0 && preferred_family == AF_UNSPEC) {
		cmd = CMD_DEL;
		req.g.cmd = TCP_METRICS_CMD_DEL;
		ack = 1;
	} else if (cmd == CMD_DEL) {
		req.g.cmd = TCP_METRICS_CMD_DEL;
		ack = 1;
	} else {	/* CMD_FLUSH, CMD_LIST */
		ack = 0;
	}

	if (genl_init_handle(&grth, TCP_METRICS_GENL_NAME, &genl_family))
		exit(1);
	req.n.nlmsg_type = genl_family;

	if (!(cmd & CMD_FLUSH) && (atype >= 0 || (cmd & CMD_DEL))) {
		if (ack)
			req.n.nlmsg_flags |= NLM_F_ACK;
		if (atype >= 0)
			addattr_l(&req.n, sizeof(req), atype, &f.daddr.data,
				  f.daddr.bytelen);
		if (stype >= 0)
			addattr_l(&req.n, sizeof(req), stype, &f.saddr.data,
				  f.saddr.bytelen);
	} else {
		req.n.nlmsg_flags |= NLM_F_DUMP;
	}

	f.cmd = cmd;
	if (cmd & CMD_FLUSH) {
		int round = 0;
		char flushb[4096-512];

		f.flushb = flushb;
		f.flushp = 0;
		f.flushe = sizeof(flushb);

		for (;;) {
			req.n.nlmsg_seq = grth.dump = ++grth.seq;
			if (rtnl_send(&grth, &req, req.n.nlmsg_len) < 0) {
				perror("Failed to send flush request");
				exit(1);
			}
			f.flushed = 0;
			if (rtnl_dump_filter(&grth, process_msg, stdout) < 0) {
				fprintf(stderr, "Flush terminated\n");
				exit(1);
			}
			if (f.flushed == 0) {
				if (round == 0) {
					fprintf(stderr, "Nothing to flush.\n");
				} else if (show_stats)
					printf("*** Flush is complete after %d round%s ***\n",
					       round, round > 1 ? "s" : "");
				fflush(stdout);
				return 0;
			}
			round++;
			if (flush_update() < 0)
				exit(1);
			if (show_stats) {
				printf("\n*** Round %d, deleting %d entries ***\n",
				       round, f.flushed);
				fflush(stdout);
			}
		}
		return 0;
	}

	if (ack) {
		if (rtnl_talk(&grth, &req.n, NULL) < 0)
			return -2;
	} else if (atype >= 0) {
		if (rtnl_talk(&grth, &req.n, &answer) < 0)
			return -2;
		if (process_msg(answer, stdout) < 0) {
			fprintf(stderr, "Dump terminated\n");
			exit(1);
		}
		free(answer);
	} else {
		req.n.nlmsg_seq = grth.dump = ++grth.seq;
		if (rtnl_send(&grth, &req, req.n.nlmsg_len) < 0) {
			perror("Failed to send dump request");
			exit(1);
		}

		new_json_obj(json);
		if (rtnl_dump_filter(&grth, process_msg, stdout) < 0) {
			fprintf(stderr, "Dump terminated\n");
			exit(1);
		}
		delete_json_obj();
	}
	return 0;
}

int do_tcp_metrics(int argc, char **argv)
{
	int i;

	if (argc < 1)
		return tcpm_do_cmd(CMD_LIST, 0, NULL);
	for (i = 0; i < ARRAY_SIZE(cmds); i++) {
		if (matches(argv[0], cmds[i].name) == 0)
			return tcpm_do_cmd(cmds[i].code, argc-1, argv+1);
	}
	if (matches(argv[0], "help") == 0)
		usage();

	fprintf(stderr, "Command \"%s\" is unknown, try \"ip tcp_metrics help\".\n",
			*argv);
	exit(-1);
}
Commit	Line	Data
ea63a69b JA	1	/*
	2	* tcp_metrics.c "ip tcp_metrics/tcpmetrics"
	3	*
	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	* version 2 as published by the Free Software Foundation;
	7	*
	8	* Authors: Julian Anastasov <ja@ssi.bg>, August 2012
	9	*/
	10
	11	#include <stdio.h>
	12	#include <stdlib.h>
	13	#include <string.h>
	14	#include <unistd.h>
	15	#include <errno.h>
	16	#include <sys/types.h>
	17	#include <sys/socket.h>
	18	#include <arpa/inet.h>
	19	#include <sys/ioctl.h>
	20	#include <linux/if.h>
	21
	22	#include <linux/genetlink.h>
	23	#include <linux/tcp_metrics.h>
	24
	25	#include "utils.h"
	26	#include "ip_common.h"
	27	#include "libgenl.h"
	28
	29	static void usage(void)
	30	{
8589eb4e MC	31	fprintf(stderr,
	32	"Usage: ip tcp_metrics/tcpmetrics { COMMAND \| help }\n"
	33	" ip tcp_metrics { show \| flush } SELECTOR\n"
	34	" ip tcp_metrics delete [ address ] ADDRESS\n"
	35	"SELECTOR := [ [ address ] PREFIX ]\n");
ea63a69b JA	36	exit(-1);
	37	}
	38
	39	/* netlink socket */
	40	static struct rtnl_handle grth = { .fd = -1 };
	41	static int genl_family = -1;
74498126	42	static const double usec_per_sec = 1000000.;
ea63a69b JA	43
	44	#define TCPM_REQUEST(_req, _bufsiz, _cmd, _flags) \
	45	GENL_REQUEST(_req, _bufsiz, genl_family, 0, \
	46	TCP_METRICS_GENL_VERSION, _cmd, _flags)
	47
	48	#define CMD_LIST 0x0001 /* list, lst, show */
	49	#define CMD_DEL 0x0002 /* delete, remove */
	50	#define CMD_FLUSH 0x0004 /* flush */
	51
8a61d896 SH	52	static const struct {
8a61d896 SH	53	const char *name;
ea63a69b JA	54	int code;
	55	} cmds[] = {
	56	{ "list", CMD_LIST },
	57	{ "lst", CMD_LIST },
	58	{ "show", CMD_LIST },
	59	{ "delete", CMD_DEL },
	60	{ "remove", CMD_DEL },
	61	{ "flush", CMD_FLUSH },
	62	};
	63
8a61d896	64	static const char *metric_name[TCP_METRIC_MAX + 1] = {
ea63a69b JA	65	[TCP_METRIC_RTT] = "rtt",
	66	[TCP_METRIC_RTTVAR] = "rttvar",
	67	[TCP_METRIC_SSTHRESH] = "ssthresh",
	68	[TCP_METRIC_CWND] = "cwnd",
	69	[TCP_METRIC_REORDERING] = "reordering",
	70	};
	71
8a61d896	72	static struct {
ea63a69b JA	73	int flushed;
	74	char *flushb;
	75	int flushp;
	76	int flushe;
	77	int cmd;
54b237a0	78	inet_prefix daddr;
c3304904	79	inet_prefix saddr;
ea63a69b JA	80	} f;
	81
	82	static int flush_update(void)
	83	{
	84	if (rtnl_send_check(&grth, f.flushb, f.flushp) < 0) {
	85	perror("Failed to send flush request\n");
	86	return -1;
	87	}
	88	f.flushp = 0;
	89	return 0;
	90	}
	91
74498126 SH	92	static void print_tcp_metrics(struct rtattr *a)
	93	{
	94	struct rtattr *m[TCP_METRIC_MAX + 1 + 1];
	95	unsigned long rtt = 0, rttvar = 0;
	96	int i;
	97
	98	parse_rtattr_nested(m, TCP_METRIC_MAX + 1, a);
	99
	100	for (i = 0; i < TCP_METRIC_MAX + 1; i++) {
	101	const char *name;
	102	__u32 val;
	103	SPRINT_BUF(b1);
	104
	105	a = m[i + 1];
	106	if (!a)
	107	continue;
	108
	109	val = rta_getattr_u32(a);
	110
	111	switch (i) {
	112	case TCP_METRIC_RTT:
	113	if (!rtt)
	114	rtt = (val * 1000UL) >> 3;
	115	continue;
	116	case TCP_METRIC_RTTVAR:
	117	if (!rttvar)
	118	rttvar = (val * 1000UL) >> 2;
	119	continue;
	120	case TCP_METRIC_RTT_US:
	121	rtt = val >> 3;
	122	continue;
	123
	124	case TCP_METRIC_RTTVAR_US:
	125	rttvar = val >> 2;
	126	continue;
	127
	128	case TCP_METRIC_SSTHRESH:
	129	case TCP_METRIC_CWND:
	130	case TCP_METRIC_REORDERING:
	131	name = metric_name[i];
	132	break;
	133
	134	default:
	135	snprintf(b1, sizeof(b1),
	136	" metric_%d ", i);
	137	name = b1;
	138	}
	139
	140
	141	print_uint(PRINT_JSON, name, NULL, val);
	142	print_string(PRINT_FP, NULL, " %s ", name);
4db2ff0d	143	print_uint(PRINT_FP, NULL, "%u", val);
74498126 SH	144	}
	145
	146	if (rtt) {
	147	print_float(PRINT_JSON, "rtt", NULL,
	148	(double)rtt / usec_per_sec);
4db2ff0d	149	print_u64(PRINT_FP, NULL,
74498126 SH	150	" rtt %luus", rtt);
	151	}
	152	if (rttvar) {
	153	print_float(PRINT_JSON, "rttvar", NULL,
	154	(double) rttvar / usec_per_sec);
4db2ff0d	155	print_u64(PRINT_FP, NULL,
74498126 SH	156	" rttvar %luus", rttvar);
	157	}
	158	}
	159
cd554f2c	160	static int process_msg(struct nlmsghdr n, void arg)
ea63a69b JA	161	{
	162	FILE fp = (FILE ) arg;
	163	struct genlmsghdr *ghdr;
	164	struct rtattr attrs[TCP_METRICS_ATTR_MAX + 1], a;
74498126	165	const char *h;
ea63a69b	166	int len = n->nlmsg_len;
114aa720	167	inet_prefix daddr, saddr;
74498126	168	int atype, stype;
ea63a69b JA	169
	170	if (n->nlmsg_type != genl_family)
	171	return -1;
	172
	173	len -= NLMSG_LENGTH(GENL_HDRLEN);
	174	if (len < 0)
	175	return -1;
	176
	177	ghdr = NLMSG_DATA(n);
	178	if (ghdr->cmd != TCP_METRICS_CMD_GET)
	179	return 0;
	180
	181	parse_rtattr(attrs, TCP_METRICS_ATTR_MAX, (void *) ghdr + GENL_HDRLEN,
	182	len);
	183
08401220	184	if (attrs[TCP_METRICS_ATTR_ADDR_IPV4]) {
54b237a0	185	if (f.daddr.family && f.daddr.family != AF_INET)
ea63a69b	186	return 0;
08401220	187	a = attrs[TCP_METRICS_ATTR_ADDR_IPV4];
228f2e97	188	daddr.family = AF_INET;
ea63a69b	189	atype = TCP_METRICS_ATTR_ADDR_IPV4;
08401220 JS	190	} else if (attrs[TCP_METRICS_ATTR_ADDR_IPV6]) {
08401220 JS	191	if (f.daddr.family && f.daddr.family != AF_INET6)
ea63a69b	192	return 0;
08401220	193	a = attrs[TCP_METRICS_ATTR_ADDR_IPV6];
228f2e97	194	daddr.family = AF_INET6;
08401220	195	atype = TCP_METRICS_ATTR_ADDR_IPV6;
08401220 JS	196	} else {
08401220 JS	197	return 0;
ea63a69b JA	198	}
ea63a69b JA	199
228f2e97 SP	200	if (get_addr_rta(&daddr, a, daddr.family))
	201	return 0;
	202
	203	if (f.daddr.family && f.daddr.bitlen >= 0 &&
	204	inet_addr_match(&daddr, &f.daddr, f.daddr.bitlen))
	205	return 0;
	206
08401220	207	if (attrs[TCP_METRICS_ATTR_SADDR_IPV4]) {
114aa720 CP	208	if (f.saddr.family && f.saddr.family != AF_INET)
114aa720 CP	209	return 0;
08401220	210	a = attrs[TCP_METRICS_ATTR_SADDR_IPV4];
228f2e97	211	saddr.family = AF_INET;
114aa720	212	stype = TCP_METRICS_ATTR_SADDR_IPV4;
08401220 JS	213	} else if (attrs[TCP_METRICS_ATTR_SADDR_IPV6]) {
	214	if (f.saddr.family && f.saddr.family != AF_INET6)
	215	return 0;
114aa720	216	a = attrs[TCP_METRICS_ATTR_SADDR_IPV6];
228f2e97	217	saddr.family = AF_INET6;
08401220	218	stype = TCP_METRICS_ATTR_SADDR_IPV6;
228f2e97 SP	219	} else {
	220	saddr.family = AF_UNSPEC;
	221	stype = 0;
114aa720 CP	222	}
114aa720 CP	223
228f2e97 SP	224	/* Only get/check for the source-address if the kernel supports it. */
	225	if (saddr.family) {
	226	if (get_addr_rta(&saddr, a, saddr.family))
	227	return 0;
	228
	229	if (f.saddr.family && f.saddr.bitlen >= 0 &&
	230	inet_addr_match(&saddr, &f.saddr, f.saddr.bitlen))
	231	return 0;
	232	}
ea63a69b JA	233
	234	if (f.flushb) {
	235	struct nlmsghdr *fn;
56f5daac	236
ea63a69b JA	237	TCPM_REQUEST(req2, 128, TCP_METRICS_CMD_DEL, NLM_F_REQUEST);
ea63a69b JA	238
228f2e97	239	addattr_l(&req2.n, sizeof(req2), atype, daddr.data,
54b237a0	240	daddr.bytelen);
228f2e97 SP	241	if (saddr.family)
228f2e97 SP	242	addattr_l(&req2.n, sizeof(req2), stype, saddr.data,
c3304904	243	saddr.bytelen);
ea63a69b JA	244
	245	if (NLMSG_ALIGN(f.flushp) + req2.n.nlmsg_len > f.flushe) {
	246	if (flush_update())
	247	return -1;
	248	}
	249	fn = (struct nlmsghdr *) (f.flushb + NLMSG_ALIGN(f.flushp));
	250	memcpy(fn, &req2.n, req2.n.nlmsg_len);
	251	fn->nlmsg_seq = ++grth.seq;
	252	f.flushp = (((char *) fn) + req2.n.nlmsg_len) - f.flushb;
	253	f.flushed++;
	254	if (show_stats < 2)
	255	return 0;
	256	}
	257
74498126	258	open_json_object(NULL);
ea63a69b	259	if (f.cmd & (CMD_DEL \| CMD_FLUSH))
74498126	260	print_bool(PRINT_ANY, "deleted", "Deleted ", true);
ea63a69b	261
74498126 SH	262	h = format_host(daddr.family, daddr.bytelen, daddr.data);
	263	print_color_string(PRINT_ANY,
	264	ifa_family_color(daddr.family),
	265	"dst", "%s", h);
ea63a69b JA	266
	267	a = attrs[TCP_METRICS_ATTR_AGE];
	268	if (a) {
74498126 SH	269	__u64 val = rta_getattr_u64(a);
74498126 SH	270	double age = val / 1000.;
ea63a69b	271
74498126 SH	272	print_float(PRINT_ANY, "age",
74498126 SH	273	" age %.03fsec", age);
ea63a69b JA	274	}
	275
	276	a = attrs[TCP_METRICS_ATTR_TW_TS_STAMP];
	277	if (a) {
	278	__s32 val = (__s32) rta_getattr_u32(a);
	279	__u32 tsval;
74498126	280	char tw_ts[64];
ea63a69b JA	281
	282	a = attrs[TCP_METRICS_ATTR_TW_TSVAL];
	283	tsval = a ? rta_getattr_u32(a) : 0;
74498126 SH	284	snprintf(tw_ts, sizeof(tw_ts),
	285	"%u/%d", tsval, val);
	286	print_string(PRINT_ANY, "tw_ts_stamp",
	287	" tw_ts %s ago", tw_ts);
ea63a69b JA	288	}
ea63a69b JA	289
74498126 SH	290	if (attrs[TCP_METRICS_ATTR_VALS])
74498126 SH	291	print_tcp_metrics(attrs[TCP_METRICS_ATTR_VALS]);
ea63a69b JA	292
ea63a69b JA	293	a = attrs[TCP_METRICS_ATTR_FOPEN_MSS];
74498126 SH	294	if (a) {
	295	print_uint(PRINT_ANY, "fopen_miss", " fo_mss %u",
	296	rta_getattr_u16(a));
	297	}
ea63a69b JA	298
	299	a = attrs[TCP_METRICS_ATTR_FOPEN_SYN_DROPS];
	300	if (a) {
	301	__u16 syn_loss = rta_getattr_u16(a);
74498126	302	double ts;
ea63a69b JA	303
	304	a = attrs[TCP_METRICS_ATTR_FOPEN_SYN_DROP_TS];
	305	ts = a ? rta_getattr_u64(a) : 0;
	306
74498126 SH	307	print_uint(PRINT_ANY, "fopen_syn_drops",
	308	" fo_syn_drops %u", syn_loss);
	309	print_float(PRINT_ANY, "fopen_syn_drop_ts",
	310	"/%.03fusec ago",
	311	ts / 1000000.);
ea63a69b JA	312	}
	313
	314	a = attrs[TCP_METRICS_ATTR_FOPEN_COOKIE];
	315	if (a) {
	316	char cookie[32 + 1];
	317	unsigned char *ptr = RTA_DATA(a);
	318	int i, max = RTA_PAYLOAD(a);
	319
	320	if (max > 16)
	321	max = 16;
	322	cookie[0] = 0;
	323	for (i = 0; i < max; i++)
	324	sprintf(cookie + i + i, "%02x", ptr[i]);
74498126 SH	325
	326	print_string(PRINT_ANY, "fo_cookie",
	327	" fo_cookie %s", cookie);
ea63a69b JA	328	}
ea63a69b JA	329
228f2e97	330	if (saddr.family) {
74498126	331	const char *src;
114aa720	332
74498126 SH	333	src = format_host(saddr.family, saddr.bytelen, saddr.data);
	334	print_string(PRINT_ANY, "source",
	335	" source %s", src);
	336	}
ea63a69b	337
74498126 SH	338	print_string(PRINT_FP, NULL, "\n", "");
74498126 SH	339	close_json_object();
ea63a69b JA	340	fflush(fp);
	341	return 0;
	342	}
	343
	344	static int tcpm_do_cmd(int cmd, int argc, char **argv)
	345	{
	346	TCPM_REQUEST(req, 1024, TCP_METRICS_CMD_GET, NLM_F_REQUEST);
86bf43c7	347	struct nlmsghdr *answer;
c3304904	348	int atype = -1, stype = -1;
ea63a69b JA	349	int ack;
	350
	351	memset(&f, 0, sizeof(f));
54b237a0 CP	352	f.daddr.bitlen = -1;
54b237a0 CP	353	f.daddr.family = preferred_family;
c3304904 CP	354	f.saddr.bitlen = -1;
c3304904 CP	355	f.saddr.family = preferred_family;
ea63a69b JA	356
	357	switch (preferred_family) {
	358	case AF_UNSPEC:
	359	case AF_INET:
	360	case AF_INET6:
	361	break;
	362	default:
14645ec2	363	fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
ea63a69b JA	364	return -1;
	365	}
	366
	367	for (; argc > 0; argc--, argv++) {
c3304904 CP	368	if (strcmp(*argv, "src") == 0 \|\|
	369	strcmp(*argv, "source") == 0) {
	370	char who = argv;
56f5daac	371
ea63a69b	372	NEXT_ARG();
c3304904 CP	373	if (matches(*argv, "help") == 0)
	374	usage();
	375	if (f.saddr.bitlen >= 0)
	376	duparg2(who, *argv);
	377
	378	get_prefix(&f.saddr, *argv, preferred_family);
	379	if (f.saddr.bytelen && f.saddr.bytelen * 8 == f.saddr.bitlen) {
	380	if (f.saddr.family == AF_INET)
	381	stype = TCP_METRICS_ATTR_SADDR_IPV4;
	382	else if (f.saddr.family == AF_INET6)
	383	stype = TCP_METRICS_ATTR_SADDR_IPV6;
	384	}
ea63a69b	385
c3304904 CP	386	if (stype < 0) {
	387	fprintf(stderr, "Error: a specific IP address is expected rather than \"%s\"\n",
	388	*argv);
	389	return -1;
	390	}
	391	} else {
	392	char *who = "address";
56f5daac	393
c3304904 CP	394	if (strcmp(*argv, "addr") == 0 \|\|
	395	strcmp(*argv, "address") == 0) {
	396	who = *argv;
	397	NEXT_ARG();
	398	}
	399	if (matches(*argv, "help") == 0)
	400	usage();
	401	if (f.daddr.bitlen >= 0)
	402	duparg2(who, *argv);
	403
	404	get_prefix(&f.daddr, *argv, preferred_family);
	405	if (f.daddr.bytelen && f.daddr.bytelen * 8 == f.daddr.bitlen) {
	406	if (f.daddr.family == AF_INET)
	407	atype = TCP_METRICS_ATTR_ADDR_IPV4;
	408	else if (f.daddr.family == AF_INET6)
	409	atype = TCP_METRICS_ATTR_ADDR_IPV6;
	410	}
	411	if ((CMD_DEL & cmd) && atype < 0) {
	412	fprintf(stderr, "Error: a specific IP address is expected rather than \"%s\"\n",
	413	*argv);
	414	return -1;
	415	}
	416	}
ea63a69b JA	417	argc--; argv++;
	418	}
	419
	420	if (cmd == CMD_DEL && atype < 0)
	421	missarg("address");
	422
	423	/* flush for exact address ? Single del */
	424	if (cmd == CMD_FLUSH && atype >= 0)
	425	cmd = CMD_DEL;
	426
	427	/* flush for all addresses ? Single del without address */
54b237a0	428	if (cmd == CMD_FLUSH && f.daddr.bitlen <= 0 &&
c3304904	429	f.saddr.bitlen <= 0 && preferred_family == AF_UNSPEC) {
ea63a69b JA	430	cmd = CMD_DEL;
	431	req.g.cmd = TCP_METRICS_CMD_DEL;
	432	ack = 1;
	433	} else if (cmd == CMD_DEL) {
	434	req.g.cmd = TCP_METRICS_CMD_DEL;
	435	ack = 1;
	436	} else { /* CMD_FLUSH, CMD_LIST */
	437	ack = 0;
	438	}
	439
2b68cb77 SD	440	if (genl_init_handle(&grth, TCP_METRICS_GENL_NAME, &genl_family))
	441	exit(1);
	442	req.n.nlmsg_type = genl_family;
ea63a69b JA	443
	444	if (!(cmd & CMD_FLUSH) && (atype >= 0 \|\| (cmd & CMD_DEL))) {
	445	if (ack)
	446	req.n.nlmsg_flags \|= NLM_F_ACK;
	447	if (atype >= 0)
54b237a0 CP	448	addattr_l(&req.n, sizeof(req), atype, &f.daddr.data,
54b237a0 CP	449	f.daddr.bytelen);
c3304904 CP	450	if (stype >= 0)
	451	addattr_l(&req.n, sizeof(req), stype, &f.saddr.data,
	452	f.saddr.bytelen);
ea63a69b JA	453	} else {
	454	req.n.nlmsg_flags \|= NLM_F_DUMP;
	455	}
	456
	457	f.cmd = cmd;
	458	if (cmd & CMD_FLUSH) {
	459	int round = 0;
	460	char flushb[4096-512];
	461
	462	f.flushb = flushb;
	463	f.flushp = 0;
	464	f.flushe = sizeof(flushb);
	465
	466	for (;;) {
	467	req.n.nlmsg_seq = grth.dump = ++grth.seq;
	468	if (rtnl_send(&grth, &req, req.n.nlmsg_len) < 0) {
	469	perror("Failed to send flush request");
	470	exit(1);
	471	}
	472	f.flushed = 0;
	473	if (rtnl_dump_filter(&grth, process_msg, stdout) < 0) {
	474	fprintf(stderr, "Flush terminated\n");
	475	exit(1);
	476	}
	477	if (f.flushed == 0) {
	478	if (round == 0) {
	479	fprintf(stderr, "Nothing to flush.\n");
	480	} else if (show_stats)
	481	printf("* Flush is complete after %d round%s *\n",
	482	round, round > 1 ? "s" : "");
	483	fflush(stdout);
	484	return 0;
	485	}
	486	round++;
	487	if (flush_update() < 0)
	488	exit(1);
	489	if (show_stats) {
	490	printf("\n* Round %d, deleting %d entries *\n",
	491	round, f.flushed);
	492	fflush(stdout);
	493	}
	494	}
	495	return 0;
	496	}
	497
	498	if (ack) {
86bf43c7	499	if (rtnl_talk(&grth, &req.n, NULL) < 0)
ea63a69b JA	500	return -2;
ea63a69b JA	501	} else if (atype >= 0) {
86bf43c7	502	if (rtnl_talk(&grth, &req.n, &answer) < 0)
ea63a69b	503	return -2;
cd554f2c	504	if (process_msg(answer, stdout) < 0) {
ea63a69b JA	505	fprintf(stderr, "Dump terminated\n");
	506	exit(1);
	507	}
86bf43c7	508	free(answer);
ea63a69b JA	509	} else {
	510	req.n.nlmsg_seq = grth.dump = ++grth.seq;
	511	if (rtnl_send(&grth, &req, req.n.nlmsg_len) < 0) {
	512	perror("Failed to send dump request");
	513	exit(1);
	514	}
	515
74498126	516	new_json_obj(json);
ea63a69b JA	517	if (rtnl_dump_filter(&grth, process_msg, stdout) < 0) {
	518	fprintf(stderr, "Dump terminated\n");
	519	exit(1);
	520	}
74498126	521	delete_json_obj();
ea63a69b JA	522	}
	523	return 0;
	524	}
	525
	526	int do_tcp_metrics(int argc, char **argv)
	527	{
	528	int i;
	529
	530	if (argc < 1)
	531	return tcpm_do_cmd(CMD_LIST, 0, NULL);
	532	for (i = 0; i < ARRAY_SIZE(cmds); i++) {
	533	if (matches(argv[0], cmds[i].name) == 0)
	534	return tcpm_do_cmd(cmds[i].code, argc-1, argv+1);
	535	}
	536	if (matches(argv[0], "help") == 0)
	537	usage();
	538
56f5daac SH	539	fprintf(stderr, "Command \"%s\" is unknown, try \"ip tcp_metrics help\".\n",
56f5daac SH	540	*argv);
ea63a69b JA	541	exit(-1);
ea63a69b JA	542	}