void
bgp_dump_packet_func (struct bgp_dump *bgp_dump, struct peer *peer,
struct stream *packet)
{
struct stream *obuf;
/* If dump file pointer is disabled return immediately. */
if (bgp_dump->fp == NULL)
return;
/* Make dump stream. */
obuf = bgp_dump_obuf;
stream_reset (obuf);
/* Dump header and common part. */
bgp_dump_header (obuf, MSG_PROTOCOL_BGP4MP, BGP4MP_MESSAGE);
bgp_dump_common (obuf, peer);
/* Packet contents. */
stream_put (obuf, STREAM_DATA (packet), stream_get_endp (packet));
/* Set length. */
bgp_dump_set_size (obuf, MSG_PROTOCOL_BGP4MP);
/* Write to the stream. */
fwrite (STREAM_DATA (obuf), stream_get_putp (obuf), 1, bgp_dump->fp);
fflush (bgp_dump->fp);
}
/* Dump BGP status change. */
void
bgp_dump_state (struct peer *peer, int status_old, int status_new)
{
struct stream *obuf;
/* If dump file pointer is disabled return immediately. */
if (bgp_dump_all.fp == NULL)
return;
/* Make dump stream. */
obuf = bgp_dump_obuf;
stream_reset (obuf);
bgp_dump_header (obuf, MSG_PROTOCOL_BGP4MP, BGP4MP_STATE_CHANGE);
bgp_dump_common (obuf, peer);
stream_putw (obuf, status_old);
stream_putw (obuf, status_new);
/* Set length. */
bgp_dump_set_size (obuf, MSG_PROTOCOL_BGP4MP);
/* Write to the stream. */
fwrite (STREAM_DATA (obuf), stream_get_putp (obuf), 1, bgp_dump_all.fp);
fflush (bgp_dump_all.fp);
}
/*
* The zebra server sends the clients a ZEBRA_IPV4_ROUTE_ADD or a
* ZEBRA_IPV6_ROUTE_ADD via zsend_route_multipath in the following
* situations:
* - when the client starts up, and requests default information
* by sending a ZEBRA_REDISTRIBUTE_DEFAULT_ADD to the zebra server, in the
* - case of rip, ripngd, ospfd and ospf6d, when the client sends a
* ZEBRA_REDISTRIBUTE_ADD as a result of the "redistribute" vty cmd,
* - when the zebra server redistributes routes after it updates its rib
*
* The zebra server sends clients a ZEBRA_IPV4_ROUTE_DELETE or a
* ZEBRA_IPV6_ROUTE_DELETE via zsend_route_multipath when:
* - a "ip route" or "ipv6 route" vty command is issued, a prefix is
* - deleted from zebra's rib, and this info
* has to be redistributed to the clients
*
* XXX The ZEBRA_IPV*_ROUTE_ADD message is also sent by the client to the
* zebra server when the client wants to tell the zebra server to add a
* route to the kernel (zapi_ipv4_add etc. ). Since it's essentially the
* same message being sent back and forth, this function and
* zapi_ipv{4,6}_{add, delete} should be re-written to avoid code
* duplication.
*/
int
zsend_route_multipath (int cmd, struct zserv *client, struct prefix *p,
struct rib *rib)
{
int psize;
struct stream *s;
struct nexthop *nexthop;
unsigned long nhnummark = 0;
int nhnum = 0;
u_char zapi_flags = ZAPI_MESSAGE_NEXTHOP | ZAPI_MESSAGE_IFINDEX;
s = client->obuf;
stream_reset (s);
/* Place holder for size. */
stream_putw (s, 0);
/* Put command, type and nexthop. */
stream_putc (s, cmd);
stream_putc (s, rib->type);
stream_putc (s, rib->flags);
/*
* XXX no need to set ZAPI_MESSAGE_NEXTHOP if we are going to
* send empty nexthop?
*/
if (cmd == ZEBRA_IPV4_ROUTE_ADD || ZEBRA_IPV6_ROUTE_ADD)
zapi_flags |= ZAPI_MESSAGE_METRIC;
stream_putc (s, zapi_flags);
/* Prefix. */
psize = PSIZE (p->prefixlen);
stream_putc (s, p->prefixlen);
stream_write (s, (u_char *) & p->u.prefix, psize);
/*
* XXX The message format sent by zebra below does not match the format
* of the corresponding message expected by the zebra server
* itself (e.g., see zread_ipv4_add). The nexthop_num is not set correctly,
* (is there a bug on the client side if more than one segment is sent?)
* nexthop ZEBRA_NEXTHOP_IPV4 is never set, ZEBRA_NEXTHOP_IFINDEX
* is hard-coded.
*/
/* Nexthop */
for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next)
{
if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))
{
nhnummark = stream_get_putp (s);
stream_putc (s, 1); /* placeholder */
nhnum++;
switch(nexthop->type)
{
case NEXTHOP_TYPE_IPV4:
case NEXTHOP_TYPE_IPV4_IFINDEX:
stream_put_in_addr (s, &nexthop->gate.ipv4);
break;
#ifdef HAVE_IPV6
case NEXTHOP_TYPE_IPV6:
case NEXTHOP_TYPE_IPV6_IFINDEX:
case NEXTHOP_TYPE_IPV6_IFNAME:
stream_write (s, (u_char *) &nexthop->gate.ipv6, 16);
break;
#endif
default:
if (cmd == ZEBRA_IPV4_ROUTE_ADD
|| cmd == ZEBRA_IPV4_ROUTE_DELETE)
{
struct in_addr empty;
memset (&empty, 0, sizeof (struct in_addr));
stream_write (s, (u_char *) &empty, IPV4_MAX_BYTELEN);
}
else
{
struct in6_addr empty;
memset (&empty, 0, sizeof (struct in6_addr));
stream_write (s, (u_char *) &empty, IPV6_MAX_BYTELEN);
}
}
/* Interface index. */
stream_putc (s, 1);
stream_putl (s, nexthop->ifindex);
break;
}
}
/* Metric */
stream_putl (s, rib->metric);
/* Write next-hop number */
if (nhnummark)
stream_putc_at (s, nhnummark, nhnum);
/* Write packet size. */
stream_putw_at (s, 0, stream_get_endp (s));
zebra_server_send_message (client->sock, s->data, stream_get_endp (s));
return 0;
}
void
bgp_dump_routes_entry (struct prefix *p, struct bgp_info *info, int afi,
int type, unsigned int seq)
{
struct stream *obuf;
struct attr *attr;
struct peer *peer;
int plen;
int safi = 0;
/* Make dump stream. */
obuf = bgp_dump_obuf;
stream_reset (obuf);
attr = info->attr;
peer = info->peer;
/* We support MRT's old format. */
if (type == MSG_TABLE_DUMP)
{
bgp_dump_header (obuf, MSG_TABLE_DUMP, afi);
stream_putw (obuf, 0); /* View # */
stream_putw (obuf, seq); /* Sequence number. */
}
else
{
bgp_dump_header (obuf, MSG_PROTOCOL_BGP4MP, BGP4MP_ENTRY);
stream_putl (obuf, info->uptime); /* Time Last Change */
stream_putw (obuf, afi); /* Address Family */
stream_putc (obuf, safi); /* SAFI */
}
if (afi == AFI_IP)
{
if (type == MSG_TABLE_DUMP)
{
/* Prefix */
stream_put_in_addr (obuf, &p->u.prefix4);
stream_putc (obuf, p->prefixlen);
/* Status */
stream_putc (obuf, 1);
/* Originated */
stream_putl (obuf, info->uptime);
/* Peer's IP address */
stream_put_in_addr (obuf, &peer->su.sin.sin_addr);
/* Peer's AS number. */
stream_putw (obuf, peer->as);
/* Dump attribute. */
bgp_dump_routes_attr (obuf, attr, p);
}
else
{
/* Next-Hop-Len */
stream_putc (obuf, IPV4_MAX_BYTELEN);
stream_put_in_addr (obuf, &attr->nexthop);
stream_putc (obuf, p->prefixlen);
plen = PSIZE (p->prefixlen);
stream_put (obuf, &p->u.prefix4, plen);
bgp_dump_routes_attr (obuf, attr, p);
}
}
#ifdef HAVE_IPV6
else if (afi == AFI_IP6)
{
if (type == MSG_TABLE_DUMP)
{
/* Prefix */
stream_write (obuf, (u_char *)&p->u.prefix6, IPV6_MAX_BYTELEN);
stream_putc (obuf, p->prefixlen);
/* Status */
stream_putc (obuf, 1);
/* Originated */
stream_putl (obuf, info->uptime);
/* Peer's IP address */
stream_write (obuf, (u_char *)&peer->su.sin6.sin6_addr,
IPV6_MAX_BYTELEN);
/* Peer's AS number. */
stream_putw (obuf, peer->as);
/* Dump attribute. */
bgp_dump_routes_attr (obuf, attr, p);
}
else
{
;
}
}
#endif /* HAVE_IPV6 */
/* Set length. */
bgp_dump_set_size (obuf, type);
fwrite (STREAM_DATA (obuf), stream_get_putp (obuf), 1, bgp_dump_routes.fp);
fflush (bgp_dump_routes.fp);
}
void
bgp_dump_set_size (struct stream *s, int type)
{
stream_putl_at (s, 8, stream_get_putp (s) - BGP_DUMP_HEADER_SIZE);
}
/* Fill in capability open option to the packet. */
void
bgp_open_capability (struct stream *s, struct peer *peer)
{
u_char len;
unsigned long cp;
afi_t afi;
safi_t safi;
/* Remember current pointer for Opt Parm Len. */
cp = stream_get_putp (s);
/* Opt Parm Len. */
stream_putc (s, 0);
/* Do not send capability. */
if (! CHECK_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN)
|| CHECK_FLAG (peer->flags, PEER_FLAG_DONT_CAPABILITY))
return;
/* When the peer is IPv4 unicast only, do not send capability. */
if (! peer->afc[AFI_IP][SAFI_MULTICAST]
&& ! peer->afc[AFI_IP][SAFI_MPLS_VPN]
&& ! peer->afc[AFI_IP6][SAFI_UNICAST]
&& ! peer->afc[AFI_IP6][SAFI_MULTICAST]
&& CHECK_FLAG (peer->flags, PEER_FLAG_NO_ROUTE_REFRESH_CAP)
&& ! CHECK_FLAG (peer->af_flags[AFI_IP][SAFI_UNICAST],
PEER_FLAG_ORF_PREFIX_SM)
&& ! CHECK_FLAG (peer->af_flags[AFI_IP][SAFI_UNICAST],
PEER_FLAG_ORF_PREFIX_RM)
&& ! CHECK_FLAG (peer->af_flags[AFI_IP][SAFI_MULTICAST],
PEER_FLAG_ORF_PREFIX_SM)
&& ! CHECK_FLAG (peer->af_flags[AFI_IP][SAFI_MULTICAST],
PEER_FLAG_ORF_PREFIX_RM)
&& ! CHECK_FLAG (peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY))
return;
/* IPv4 unicast. */
if (peer->afc[AFI_IP][SAFI_UNICAST])
{
peer->afc_adv[AFI_IP][SAFI_UNICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_UNICAST);
}
/* IPv4 multicast. */
if (peer->afc[AFI_IP][SAFI_MULTICAST])
{
peer->afc_adv[AFI_IP][SAFI_MULTICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, SAFI_MULTICAST);
}
/* IPv4 VPN */
if (peer->afc[AFI_IP][SAFI_MPLS_VPN])
{
peer->afc_adv[AFI_IP][SAFI_MPLS_VPN] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP);
stream_putc (s, 0);
stream_putc (s, BGP_SAFI_VPNV4);
}
#ifdef HAVE_IPV6
/* IPv6 unicast. */
if (peer->afc[AFI_IP6][SAFI_UNICAST])
{
peer->afc_adv[AFI_IP6][SAFI_UNICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_UNICAST);
}
/* IPv6 multicast. */
if (peer->afc[AFI_IP6][SAFI_MULTICAST])
{
peer->afc_adv[AFI_IP6][SAFI_MULTICAST] = 1;
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_MP_LEN + 2);
stream_putc (s, CAPABILITY_CODE_MP);
stream_putc (s, CAPABILITY_CODE_MP_LEN);
stream_putw (s, AFI_IP6);
stream_putc (s, 0);
stream_putc (s, SAFI_MULTICAST);
}
#endif /* HAVE_IPV6 */
/* Route refresh. */
if (! CHECK_FLAG (peer->flags, PEER_FLAG_NO_ROUTE_REFRESH_CAP))
{
SET_FLAG (peer->cap, PEER_CAP_REFRESH_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2);
stream_putc (s, CAPABILITY_CODE_REFRESH_OLD);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2);
stream_putc (s, CAPABILITY_CODE_REFRESH);
stream_putc (s, CAPABILITY_CODE_REFRESH_LEN);
}
/* ORF capability. */
for (afi = AFI_IP ; afi < AFI_MAX ; afi++)
for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++)
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM)
|| CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM))
{
bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF_OLD);
bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF);
}
/* Dynamic capability. */
if (CHECK_FLAG (peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY))
{
SET_FLAG (peer->cap, PEER_CAP_DYNAMIC_ADV);
stream_putc (s, BGP_OPEN_OPT_CAP);
stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN + 2);
stream_putc (s, CAPABILITY_CODE_DYNAMIC);
stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN);
}
/* Total Opt Parm Len. */
len = stream_get_putp (s) - cp - 1;
stream_putc_at (s, cp, len);
}
void
bgp_open_capability_orf (struct stream *s, struct peer *peer,
afi_t afi, safi_t safi, u_char code)
{
u_char cap_len;
u_char orf_len;
unsigned long capp;
unsigned long orfp;
unsigned long numberp;
int number_of_orfs = 0;
if (safi == SAFI_MPLS_VPN)
safi = BGP_SAFI_VPNV4;
stream_putc (s, BGP_OPEN_OPT_CAP);
capp = stream_get_putp (s); /* Set Capability Len Pointer */
stream_putc (s, 0); /* Capability Length */
stream_putc (s, code); /* Capability Code */
orfp = stream_get_putp (s); /* Set ORF Len Pointer */
stream_putc (s, 0); /* ORF Length */
stream_putw (s, afi);
stream_putc (s, 0);
stream_putc (s, safi);
numberp = stream_get_putp (s); /* Set Number Pointer */
stream_putc (s, 0); /* Number of ORFs */
/* Address Prefix ORF */
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM)
|| CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM))
{
stream_putc (s, (code == CAPABILITY_CODE_ORF ?
ORF_TYPE_PREFIX : ORF_TYPE_PREFIX_OLD));
if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM)
&& CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM))
{
SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_ADV);
SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_ADV);
stream_putc (s, ORF_MODE_BOTH);
}
else if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM))
{
SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_ADV);
stream_putc (s, ORF_MODE_SEND);
}
else
{
SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_ADV);
stream_putc (s, ORF_MODE_RECEIVE);
}
number_of_orfs++;
}
/* Total Number of ORFs. */
stream_putc_at (s, numberp, number_of_orfs);
/* Total ORF Len. */
orf_len = stream_get_putp (s) - orfp - 1;
stream_putc_at (s, orfp, orf_len);
/* Total Capability Len. */
cap_len = stream_get_putp (s) - capp - 1;
stream_putc_at (s, capp, cap_len);
}