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/* $OpenBSD: address.c,v 1.14 2013/10/15 20:27:40 renato Exp $ */
/*
* Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <net/if_dl.h>
#include <unistd.h>
#include <errno.h>
#include <event.h>
#include <stdlib.h>
#include <string.h>
#include "ldpd.h"
#include "ldp.h"
#include "log.h"
#include "ldpe.h"
extern struct ldpd_conf *leconf;
void gen_address_list_tlv(struct ibuf *, struct if_addr *, u_int16_t);
void
send_address(struct nbr *nbr, struct if_addr *if_addr)
{
struct ibuf *buf;
u_int16_t size, iface_count = 0;
log_debug("send_address: neighbor ID %s", inet_ntoa(nbr->id));
if ((buf = ibuf_open(LDP_MAX_LEN)) == NULL)
fatal("send_address");
if (if_addr == NULL)
LIST_FOREACH(if_addr, &leconf->addr_list, global_entry)
iface_count++;
else
iface_count = 1;
size = LDP_HDR_SIZE + sizeof(struct ldp_msg) +
sizeof(struct address_list_tlv) +
iface_count * sizeof(struct in_addr);
gen_ldp_hdr(buf, size);
size -= LDP_HDR_SIZE;
gen_msg_tlv(buf, MSG_TYPE_ADDR, size);
size -= sizeof(struct ldp_msg);
gen_address_list_tlv(buf, if_addr, size);
evbuf_enqueue(&nbr->tcp->wbuf, buf);
nbr_fsm(nbr, NBR_EVT_PDU_SENT);
}
int
recv_address(struct nbr *nbr, char *buf, u_int16_t len)
{
struct ldp_msg addr;
struct address_list_tlv alt;
enum imsg_type type;
bcopy(buf, &addr, sizeof(addr));
log_debug("recv_address: neighbor ID %s%s", inet_ntoa(nbr->id),
ntohs(addr.type) == MSG_TYPE_ADDR ? "" : " address withdraw");
if (ntohs(addr.type) == MSG_TYPE_ADDR)
type = IMSG_ADDRESS_ADD;
else
type = IMSG_ADDRESS_DEL;
buf += sizeof(struct ldp_msg);
len -= sizeof(struct ldp_msg);
if (len < sizeof(alt)) {
session_shutdown(nbr, S_BAD_MSG_LEN, addr.msgid, addr.type);
return (-1);
}
bcopy(buf, &alt, sizeof(alt));
if (ntohs(alt.length) != len - TLV_HDR_LEN) {
session_shutdown(nbr, S_BAD_TLV_LEN, addr.msgid, addr.type);
return (-1);
}
if (ntohs(alt.type) != TLV_TYPE_ADDRLIST) {
session_shutdown(nbr, S_UNKNOWN_TLV, addr.msgid, addr.type);
return (-1);
}
/* For now we only support IPv4 */
if (alt.family != htons(ADDR_IPV4)) {
send_notification_nbr(nbr, S_UNSUP_ADDR, addr.msgid, addr.type);
return (-1);
}
buf += sizeof(alt);
len -= sizeof(alt);
while (len >= sizeof(struct in_addr)) {
ldpe_imsg_compose_lde(type, nbr->peerid, 0,
buf, sizeof(struct in_addr));
buf += sizeof(struct in_addr);
len -= sizeof(struct in_addr);
}
if (len != 0) {
session_shutdown(nbr, S_BAD_TLV_LEN, addr.msgid, addr.type);
return (-1);
}
return (ntohs(addr.length));
}
void
gen_address_list_tlv(struct ibuf *buf, struct if_addr *if_addr,
u_int16_t size)
{
struct address_list_tlv alt;
/* We want just the size of the value */
size -= TLV_HDR_LEN;
bzero(&alt, sizeof(alt));
alt.type = TLV_TYPE_ADDRLIST;
alt.length = htons(size);
/* XXX: just ipv4 for now */
alt.family = htons(ADDR_IPV4);
ibuf_add(buf, &alt, sizeof(alt));
if (if_addr == NULL)
LIST_FOREACH(if_addr, &leconf->addr_list, global_entry)
ibuf_add(buf, &if_addr->addr, sizeof(if_addr->addr));
else
ibuf_add(buf, &if_addr->addr, sizeof(if_addr->addr));
}
void
send_address_withdraw(struct nbr *nbr, struct if_addr *if_addr)
{
struct ibuf *buf;
u_int16_t size;
log_debug("send_address_withdraw: neighbor ID %s", inet_ntoa(nbr->id));
if ((buf = ibuf_open(LDP_MAX_LEN)) == NULL)
fatal("send_address_withdraw");
size = LDP_HDR_SIZE + sizeof(struct ldp_msg) +
sizeof(struct address_list_tlv) + sizeof(struct in_addr);
gen_ldp_hdr(buf, size);
size -= LDP_HDR_SIZE;
gen_msg_tlv(buf, MSG_TYPE_ADDRWITHDRAW, size);
size -= sizeof(struct ldp_msg);
gen_address_list_tlv(buf, if_addr, size);
evbuf_enqueue(&nbr->tcp->wbuf, buf);
nbr_fsm(nbr, NBR_EVT_PDU_SENT);
}
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