/*-
 */

#ifndef lint
static const char rcsid[] =
  "$FreeBSD$";
#endif /* not lint */

#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/sockio.h>

#include <stdlib.h>
#include <unistd.h>

#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_lagg.h>
#include <net/ieee8023ad_lacp.h>
#include <net/route.h>

#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <errno.h>

#include <libifconfig.h>

#include "ifconfig.h"

static struct iflaggparam params = {
	.lagg_type = LAGG_TYPE_DEFAULT,
};

static char lacpbuf[120];	/* LACP peer '[(a,a,a),(p,p,p)]' */

static void
setlaggport(if_ctx *ctx, const char *val, int dummy __unused)
{
	struct lagg_reqport rp;

	bzero(&rp, sizeof(rp));
	strlcpy(rp.rp_ifname, name, sizeof(rp.rp_ifname));
	strlcpy(rp.rp_portname, val, sizeof(rp.rp_portname));

	/*
	 * Do not exit with an error here.  Doing so permits a
	 * failed NIC to take down an entire lagg.
	 *
	 * Don't error at all if the port is already in the lagg.
	 */
	if (ioctl_ctx(ctx, SIOCSLAGGPORT, &rp) && errno != EEXIST) {
		warnx("%s %s: SIOCSLAGGPORT: %s",
		    name, val, strerror(errno));
		exit_code = 1;
	}
}

static void
unsetlaggport(if_ctx *ctx, const char *val, int dummy __unused)
{
	struct lagg_reqport rp;

	bzero(&rp, sizeof(rp));
	strlcpy(rp.rp_ifname, name, sizeof(rp.rp_ifname));
	strlcpy(rp.rp_portname, val, sizeof(rp.rp_portname));

	if (ioctl_ctx(ctx, SIOCSLAGGDELPORT, &rp))
		err(1, "SIOCSLAGGDELPORT");
}

static void
setlaggproto(if_ctx *ctx, const char *val, int dummy __unused)
{
	struct lagg_protos lpr[] = LAGG_PROTOS;
	struct lagg_reqall ra;

	bzero(&ra, sizeof(ra));
	ra.ra_proto = LAGG_PROTO_MAX;

	for (size_t i = 0; i < nitems(lpr); i++) {
		if (strcmp(val, lpr[i].lpr_name) == 0) {
			ra.ra_proto = lpr[i].lpr_proto;
			break;
		}
	}
	if (ra.ra_proto == LAGG_PROTO_MAX)
		errx(1, "Invalid aggregation protocol: %s", val);

	strlcpy(ra.ra_ifname, name, sizeof(ra.ra_ifname));
	if (ioctl_ctx(ctx, SIOCSLAGG, &ra) != 0)
		err(1, "SIOCSLAGG");
}

static void
setlaggflowidshift(if_ctx *ctx, const char *val, int dummy __unused)
{
	struct lagg_reqopts ro;

	bzero(&ro, sizeof(ro));
	ro.ro_opts = LAGG_OPT_FLOWIDSHIFT;
	strlcpy(ro.ro_ifname, name, sizeof(ro.ro_ifname));
	ro.ro_flowid_shift = (int)strtol(val, NULL, 10);
	if (ro.ro_flowid_shift & ~LAGG_OPT_FLOWIDSHIFT_MASK)
		errx(1, "Invalid flowid_shift option: %s", val);
	
	if (ioctl_ctx(ctx, SIOCSLAGGOPTS, &ro) != 0)
		err(1, "SIOCSLAGGOPTS");
}

static void
setlaggrr_limit(if_ctx *ctx, const char *val, int dummy __unused)
{
	struct lagg_reqopts ro;
	
	bzero(&ro, sizeof(ro));
	strlcpy(ro.ro_ifname, name, sizeof(ro.ro_ifname));
	ro.ro_opts = LAGG_OPT_RR_LIMIT;
	ro.ro_bkt = (uint32_t)strtoul(val, NULL, 10);
	if (ro.ro_bkt == 0)
		errx(1, "Invalid round-robin stride: %s", val);

	if (ioctl_ctx(ctx, SIOCSLAGGOPTS, &ro) != 0)
		err(1, "SIOCSLAGGOPTS");
}

static void
setlaggsetopt(if_ctx *ctx, const char *val __unused, int d)
{
	struct lagg_reqopts ro;

	bzero(&ro, sizeof(ro));
	ro.ro_opts = d;
	switch (ro.ro_opts) {
	case LAGG_OPT_USE_FLOWID:
	case -LAGG_OPT_USE_FLOWID:
	case LAGG_OPT_USE_NUMA:
	case -LAGG_OPT_USE_NUMA:
	case LAGG_OPT_LACP_STRICT:
	case -LAGG_OPT_LACP_STRICT:
	case LAGG_OPT_LACP_TXTEST:
	case -LAGG_OPT_LACP_TXTEST:
	case LAGG_OPT_LACP_RXTEST:
	case -LAGG_OPT_LACP_RXTEST:
	case LAGG_OPT_LACP_FAST_TIMO:
	case -LAGG_OPT_LACP_FAST_TIMO:
		break;
	default:
		err(1, "Invalid lagg option");
	}
	strlcpy(ro.ro_ifname, name, sizeof(ro.ro_ifname));
	
	if (ioctl_ctx(ctx, SIOCSLAGGOPTS, &ro) != 0)
		err(1, "SIOCSLAGGOPTS");
}

static void
setlagghash(if_ctx *ctx, const char *val, int dummy __unused)
{
	struct lagg_reqflags rf;
	char *str, *tmp, *tok;


	rf.rf_flags = 0;
	str = tmp = strdup(val);
	while ((tok = strsep(&tmp, ",")) != NULL) {
		if (strcmp(tok, "l2") == 0)
			rf.rf_flags |= LAGG_F_HASHL2;
		else if (strcmp(tok, "l3") == 0)
			rf.rf_flags |= LAGG_F_HASHL3;
		else if (strcmp(tok, "l4") == 0)
			rf.rf_flags |= LAGG_F_HASHL4;
		else
			errx(1, "Invalid lagghash option: %s", tok);
	}
	free(str);
	if (rf.rf_flags == 0)
		errx(1, "No lagghash options supplied");

	strlcpy(rf.rf_ifname, name, sizeof(rf.rf_ifname));
	if (ioctl_ctx(ctx, SIOCSLAGGHASH, &rf))
		err(1, "SIOCSLAGGHASH");
}

static char *
lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
{
	snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
	    (int)mac[0], (int)mac[1], (int)mac[2], (int)mac[3],
	    (int)mac[4], (int)mac[5]);

	return (buf);
}

static char *
lacp_format_peer(struct lacp_opreq *req, const char *sep)
{
	char macbuf1[20];
	char macbuf2[20];

	snprintf(lacpbuf, sizeof(lacpbuf),
	    "[(%04X,%s,%04X,%04X,%04X),%s(%04X,%s,%04X,%04X,%04X)]",
	    req->actor_prio,
	    lacp_format_mac(req->actor_mac, macbuf1, sizeof(macbuf1)),
	    req->actor_key, req->actor_portprio, req->actor_portno, sep,
	    req->partner_prio,
	    lacp_format_mac(req->partner_mac, macbuf2, sizeof(macbuf2)),
	    req->partner_key, req->partner_portprio, req->partner_portno);

	return(lacpbuf);
}

static void
lagg_status(if_ctx *ctx __unused)
{
	struct lagg_protos protos[] = LAGG_PROTOS;
	struct ifconfig_lagg_status *lagg;
	struct lagg_reqall *ra;
	struct lagg_reqflags *rf;
	struct lagg_reqopts *ro;
	struct lagg_reqport *ports;
	struct lacp_opreq *lp;
	const char *proto;

	if (ifconfig_lagg_get_lagg_status(lifh, name, &lagg) == -1)
		return;

	ra = lagg->ra;
	rf = lagg->rf;
	ro = lagg->ro;
	ports = ra->ra_port;

	proto = "<unknown>";
	for (size_t i = 0; i < nitems(protos); ++i) {
		if (ra->ra_proto == protos[i].lpr_proto) {
			proto = protos[i].lpr_name;
			break;
		}
	}
	printf("\tlaggproto %s", proto);

	if (rf->rf_flags & LAGG_F_HASHMASK) {
		const char *sep = "";

		printf(" lagghash ");
		if (rf->rf_flags & LAGG_F_HASHL2) {
			printf("%sl2", sep);
			sep = ",";
		}
		if (rf->rf_flags & LAGG_F_HASHL3) {
			printf("%sl3", sep);
			sep = ",";
		}
		if (rf->rf_flags & LAGG_F_HASHL4) {
			printf("%sl4", sep);
			sep = ",";
		}
	}
	putchar('\n');
	if (verbose) {
		printf("\tlagg options:\n");
		printb("\t\tflags", ro->ro_opts, LAGG_OPT_BITS);
		putchar('\n');
		printf("\t\tflowid_shift: %d\n", ro->ro_flowid_shift);
		if (ra->ra_proto == LAGG_PROTO_ROUNDROBIN)
			printf("\t\trr_limit: %d\n", ro->ro_bkt);
		printf("\tlagg statistics:\n");
		printf("\t\tactive ports: %d\n", ro->ro_active);
		printf("\t\tflapping: %u\n", ro->ro_flapping);
		if (ra->ra_proto == LAGG_PROTO_LACP) {
			lp = &ra->ra_lacpreq;
			printf("\tlag id: %s\n",
			    lacp_format_peer(lp, "\n\t\t "));
		}
	}

	for (size_t i = 0; i < (size_t)ra->ra_ports; ++i) {
		lp = &ports[i].rp_lacpreq;
		printf("\tlaggport: %s ", ports[i].rp_portname);
		printb("flags", ports[i].rp_flags, LAGG_PORT_BITS);
		if (verbose && ra->ra_proto == LAGG_PROTO_LACP)
			printb(" state", lp->actor_state, LACP_STATE_BITS);
		putchar('\n');
		if (verbose && ra->ra_proto == LAGG_PROTO_LACP)
			printf("\t\t%s\n",
			    lacp_format_peer(lp, "\n\t\t "));
	}

	ifconfig_lagg_free_lagg_status(lagg);
}

static void
setlaggtype(if_ctx *ctx, const char *arg, int dummy __unused)
{
	static const struct lagg_types lt[] = LAGG_TYPES;

	for (size_t i = 0; i < nitems(lt); i++) {
		if (strcmp(arg, lt[i].lt_name) == 0) {
			params.lagg_type = lt[i].lt_value;
			return;
		}
	}
	errx(1, "invalid lagg type: %s", arg);
}

static void
lagg_create(int s, struct ifreq *ifr)
{
	ifr->ifr_data = (caddr_t) &params;
	ioctl_ifcreate(s, ifr);
}

static struct cmd lagg_cmds[] = {
	DEF_CLONE_CMD_ARG("laggtype",   setlaggtype),
	DEF_CMD_ARG("laggport",		setlaggport),
	DEF_CMD_ARG("-laggport",	unsetlaggport),
	DEF_CMD_ARG("laggproto",	setlaggproto),
	DEF_CMD_ARG("lagghash",		setlagghash),
	DEF_CMD("use_flowid",	LAGG_OPT_USE_FLOWID,	setlaggsetopt),
	DEF_CMD("-use_flowid",	-LAGG_OPT_USE_FLOWID,	setlaggsetopt),
	DEF_CMD("use_numa",	LAGG_OPT_USE_NUMA,	setlaggsetopt),
	DEF_CMD("-use_numa",	-LAGG_OPT_USE_NUMA,	setlaggsetopt),
	DEF_CMD("lacp_strict",	LAGG_OPT_LACP_STRICT,	setlaggsetopt),
	DEF_CMD("-lacp_strict",	-LAGG_OPT_LACP_STRICT,	setlaggsetopt),
	DEF_CMD("lacp_txtest",	LAGG_OPT_LACP_TXTEST,	setlaggsetopt),
	DEF_CMD("-lacp_txtest",	-LAGG_OPT_LACP_TXTEST,	setlaggsetopt),
	DEF_CMD("lacp_rxtest",	LAGG_OPT_LACP_RXTEST,	setlaggsetopt),
	DEF_CMD("-lacp_rxtest",	-LAGG_OPT_LACP_RXTEST,	setlaggsetopt),
	DEF_CMD("lacp_fast_timeout",	LAGG_OPT_LACP_FAST_TIMO,	setlaggsetopt),
	DEF_CMD("-lacp_fast_timeout",	-LAGG_OPT_LACP_FAST_TIMO,	setlaggsetopt),
	DEF_CMD_ARG("flowid_shift",	setlaggflowidshift),
	DEF_CMD_ARG("rr_limit",		setlaggrr_limit),
};
static struct afswtch af_lagg = {
	.af_name	= "af_lagg",
	.af_af		= AF_UNSPEC,
	.af_other_status = lagg_status,
};

static __constructor void
lagg_ctor(void)
{
	for (size_t i = 0; i < nitems(lagg_cmds);  i++)
		cmd_register(&lagg_cmds[i]);
	af_register(&af_lagg);
	clone_setdefcallback_prefix("lagg", lagg_create);
}