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/* BGP RD definitions for BGP-based VPNs (IP/EVPN)
* -- brought over from bgpd/bgp_mplsvpn.c
* Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
*
* This file is part of FRR.
*
* FRR 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, or (at your option) any
* later version.
*
* FRR 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 FRR; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <zebra.h>
#include "command.h"
#include "log.h"
#include "prefix.h"
#include "memory.h"
#include "stream.h"
#include "filter.h"
#include "frrstr.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_rd.h"
#include "bgpd/bgp_attr.h"
#if ENABLE_BGP_VNC
#include "bgpd/rfapi/rfapi_backend.h"
#endif
uint16_t decode_rd_type(uint8_t *pnt)
{
uint16_t v;
v = ((uint16_t)*pnt++ << 8);
#if ENABLE_BGP_VNC
/*
* VNC L2 stores LHI in lower byte, so omit it
*/
if (v != RD_TYPE_VNC_ETH)
v |= (uint16_t)*pnt;
#else /* duplicate code for clarity */
v |= (uint16_t)*pnt;
#endif
return v;
}
void encode_rd_type(uint16_t v, uint8_t *pnt)
{
*((uint16_t *)pnt) = htons(v);
}
/* type == RD_TYPE_AS */
void decode_rd_as(uint8_t *pnt, struct rd_as *rd_as)
{
rd_as->as = (uint16_t)*pnt++ << 8;
rd_as->as |= (uint16_t)*pnt++;
ptr_get_be32(pnt, &rd_as->val);
}
/* type == RD_TYPE_AS4 */
void decode_rd_as4(uint8_t *pnt, struct rd_as *rd_as)
{
pnt = ptr_get_be32(pnt, &rd_as->as);
rd_as->val = ((uint16_t)*pnt++ << 8);
rd_as->val |= (uint16_t)*pnt;
}
/* type == RD_TYPE_IP */
void decode_rd_ip(uint8_t *pnt, struct rd_ip *rd_ip)
{
memcpy(&rd_ip->ip, pnt, 4);
pnt += 4;
rd_ip->val = ((uint16_t)*pnt++ << 8);
rd_ip->val |= (uint16_t)*pnt;
}
#if ENABLE_BGP_VNC
/* type == RD_TYPE_VNC_ETH */
void decode_rd_vnc_eth(uint8_t *pnt, struct rd_vnc_eth *rd_vnc_eth)
{
rd_vnc_eth->type = RD_TYPE_VNC_ETH;
rd_vnc_eth->local_nve_id = pnt[1];
memcpy(rd_vnc_eth->macaddr.octet, pnt + 2, ETH_ALEN);
}
#endif
int str2prefix_rd(const char *str, struct prefix_rd *prd)
{
int ret; /* ret of called functions */
int lret; /* local ret, of this func */
char *p;
char *p2;
struct stream *s = NULL;
char *half = NULL;
struct in_addr addr;
s = stream_new(8);
prd->family = AF_UNSPEC;
prd->prefixlen = 64;
lret = 0;
p = strchr(str, ':');
if (!p)
goto out;
if (!all_digit(p + 1))
goto out;
half = XMALLOC(MTYPE_TMP, (p - str) + 1);
memcpy(half, str, (p - str));
half[p - str] = '\0';
p2 = strchr(str, '.');
if (!p2) {
unsigned long as_val;
if (!all_digit(half))
goto out;
as_val = atol(half);
if (as_val > 0xffff) {
stream_putw(s, RD_TYPE_AS4);
stream_putl(s, as_val);
stream_putw(s, atol(p + 1));
} else {
stream_putw(s, RD_TYPE_AS);
stream_putw(s, as_val);
stream_putl(s, atol(p + 1));
}
} else {
ret = inet_aton(half, &addr);
if (!ret)
goto out;
stream_putw(s, RD_TYPE_IP);
stream_put_in_addr(s, &addr);
stream_putw(s, atol(p + 1));
}
memcpy(prd->val, s->data, 8);
lret = 1;
out:
if (s)
stream_free(s);
XFREE(MTYPE_TMP, half);
return lret;
}
char *prefix_rd2str(struct prefix_rd *prd, char *buf, size_t size)
{
uint8_t *pnt;
uint16_t type;
struct rd_as rd_as;
struct rd_ip rd_ip;
assert(size >= RD_ADDRSTRLEN);
pnt = prd->val;
type = decode_rd_type(pnt);
if (type == RD_TYPE_AS) {
decode_rd_as(pnt + 2, &rd_as);
snprintf(buf, size, "%u:%d", rd_as.as, rd_as.val);
return buf;
} else if (type == RD_TYPE_AS4) {
decode_rd_as4(pnt + 2, &rd_as);
snprintf(buf, size, "%u:%d", rd_as.as, rd_as.val);
return buf;
} else if (type == RD_TYPE_IP) {
decode_rd_ip(pnt + 2, &rd_ip);
snprintf(buf, size, "%s:%d", inet_ntoa(rd_ip.ip), rd_ip.val);
return buf;
}
#if ENABLE_BGP_VNC
else if (type == RD_TYPE_VNC_ETH) {
snprintf(buf, size, "LHI:%d, %02x:%02x:%02x:%02x:%02x:%02x",
*(pnt + 1), /* LHI */
*(pnt + 2), /* MAC[0] */
*(pnt + 3), *(pnt + 4), *(pnt + 5), *(pnt + 6),
*(pnt + 7));
return buf;
}
#endif
snprintf(buf, size, "Unknown Type: %d", type);
return buf;
}
void form_auto_rd(struct in_addr router_id,
uint16_t rd_id,
struct prefix_rd *prd)
{
char buf[100];
prd->family = AF_UNSPEC;
prd->prefixlen = 64;
sprintf(buf, "%s:%hu", inet_ntoa(router_id), rd_id);
(void)str2prefix_rd(buf, prd);
}
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