/*
 *
 * Copyright 2009-2016, LabN Consulting, L.L.C.
 *
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */


#include "lib/zebra.h"
#include "lib/prefix.h"
#include "lib/agg_table.h"
#include "lib/vty.h"
#include "lib/memory.h"
#include "lib/skiplist.h"


#include "bgpd/bgpd.h"

#include "bgpd/rfapi/bgp_rfapi_cfg.h"
#include "bgpd/rfapi/rfapi.h"
#include "bgpd/rfapi/rfapi_backend.h"

#include "bgpd/rfapi/rfapi_import.h"
#include "bgpd/rfapi/rfapi_private.h"
#include "bgpd/rfapi/rfapi_nve_addr.h"
#include "bgpd/rfapi/rfapi_vty.h"
#include "bgpd/rfapi/vnc_debug.h"

#define DEBUG_NVE_ADDR 0

void rfapiNveAddr2Str(struct rfapi_nve_addr *, char *, int);


#if DEBUG_NVE_ADDR
static void logdifferent(const char *tag, struct rfapi_nve_addr *a,
			 struct rfapi_nve_addr *b)
{
	char a_str[BUFSIZ];
	char b_str[BUFSIZ];

	rfapiNveAddr2Str(a, a_str, BUFSIZ);
	rfapiNveAddr2Str(b, b_str, BUFSIZ);
	vnc_zlog_debug_verbose("%s: [%s] [%s]", tag, a_str, b_str);
}
#endif


int rfapi_nve_addr_cmp(const void *k1, const void *k2)
{
	const struct rfapi_nve_addr *a = (struct rfapi_nve_addr *)k1;
	const struct rfapi_nve_addr *b = (struct rfapi_nve_addr *)k2;
	int ret = 0;

	if (!a || !b) {
#if DEBUG_NVE_ADDR
		vnc_zlog_debug_verbose("%s: missing address a=%p b=%p",
				       __func__, a, b);
#endif
		return (a - b);
	}
	if (a->un.addr_family != b->un.addr_family) {
#if DEBUG_NVE_ADDR
		vnc_zlog_debug_verbose(
			"diff: UN addr fam a->un.af=%d, b->un.af=%d",
			a->un.addr_family, b->un.addr_family);
#endif
		return (a->un.addr_family - b->un.addr_family);
	}
	if (a->un.addr_family == AF_INET) {
		ret = IPV4_ADDR_CMP(&a->un.addr.v4, &b->un.addr.v4);
		if (ret != 0) {
#if DEBUG_NVE_ADDR
			logdifferent("diff: UN addr", a, b);
#endif
			return ret;
		}
	} else if (a->un.addr_family == AF_INET6) {
		ret = IPV6_ADDR_CMP(&a->un.addr.v6, &b->un.addr.v6);
		if (ret == 0) {
#if DEBUG_NVE_ADDR
			logdifferent("diff: UN addr", a, b);
#endif
			return ret;
		}
	} else {
		assert(0);
	}
	if (a->vn.addr_family != b->vn.addr_family) {
#if DEBUG_NVE_ADDR
		vnc_zlog_debug_verbose(
			"diff: pT addr fam a->vn.af=%d, b->vn.af=%d",
			a->vn.addr_family, b->vn.addr_family);
#endif
		return (a->vn.addr_family - b->vn.addr_family);
	}
	if (a->vn.addr_family == AF_INET) {
		ret = IPV4_ADDR_CMP(&a->vn.addr.v4, &b->vn.addr.v4);
		if (ret != 0) {
#if DEBUG_NVE_ADDR
			logdifferent("diff: VN addr", a, b);
#endif
			return ret;
		}
	} else if (a->vn.addr_family == AF_INET6) {
		ret = IPV6_ADDR_CMP(&a->vn.addr.v6, &b->vn.addr.v6);
		if (ret == 0) {
#if DEBUG_NVE_ADDR
			logdifferent("diff: VN addr", a, b);
#endif
			return ret;
		}
	} else {
		assert(0);
	}
	return 0;
}

void rfapiNveAddr2Str(struct rfapi_nve_addr *na, char *buf, int bufsize)
{
	char *p = buf;
	int r;

#define REMAIN (bufsize - (p-buf))
#define INCP {p += (r > REMAIN)? REMAIN: r;}

	if (bufsize < 1)
		return;

	r = snprintf(p, REMAIN, "VN=");
	INCP;

	if (!rfapiRfapiIpAddr2Str(&na->vn, p, REMAIN))
		goto done;

	buf[bufsize - 1] = 0;
	p = buf + strlen(buf);

	r = snprintf(p, REMAIN, ", UN=");
	INCP;

	rfapiRfapiIpAddr2Str(&na->un, p, REMAIN);

done:
	buf[bufsize - 1] = 0;
}