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3c72d65495
This commit includes -
1. Maintaining SA cache with local and remote entries.
2. Local SA entries - there are two cases where we pick up these -
- We are RP and got a source-register from the FHR.
- We are RP and FHR and learnt a new directly connected source on a
DR interface.
3. Local entries are pushed to peers immediately on addition and
periodically. An immediate push is also done when peer session is
established.
4. Remote SA entries - from other peers in the mesh group and passed
peer-RPF checks.
5. Remote entries are aged out. No other way to del them
currently. In the future we may add a knob to flush entries on
peer-down.
Testing done -
Misc topologies with CL routers plus basic interop with another vendor (
we can process their SA updates and they ours).
Sample output -
root@rp:~# vtysh -c "show ip msdp sa"
Source Group RP Uptime
33.1.1.1 239.1.1.2 local 00:02:34
33.1.1.1 239.1.1.3 local 00:02:19
44.1.1.1 239.1.1.4 100.1.3.1 00:01:12
44.1.1.1 239.1.1.5 100.1.3.1 00:00:55
root@rp:~#
Ticket: CM-13306
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>
72 lines
3.1 KiB
C
72 lines
3.1 KiB
C
/*
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* IP MSDP packet helpers
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* Copyright (C) 2016 Cumulus Networks, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#ifndef PIM_MSDP_PACKET_H
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#define PIM_MSDP_PACKET_H
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/* type and length of a single tlv can be consider packet header */
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#define PIM_MSDP_HEADER_SIZE 3
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/* Keepalive TLV
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0 1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| 4 | 3 |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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#define PIM_MSDP_KA_TLV_MAX_SIZE PIM_MSDP_HEADER_SIZE
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/* Source-Active TLV (x=8, y=12xEntryCount)
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0 1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| 1 | x + y | Entry Count |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| RP Address |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Reserved | Sprefix Len | \
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ \
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| Group Address | ) z
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ /
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| Source Address | /
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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#define PIM_MSDP_SA_TLV_MAX_SIZE 9192
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#define PIM_MSDP_SA_X_SIZE 8
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#define PIM_MSDP_SA_ONE_ENTRY_SIZE 12
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#define PIM_MSDP_SA_Y_SIZE(entry_cnt) (PIM_MSDP_SA_ONE_ENTRY_SIZE * entry_cnt)
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#define PIM_MSDP_SA_ENTRY_CNT2SIZE(entry_cnt) (PIM_MSDP_SA_X_SIZE +\
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PIM_MSDP_SA_Y_SIZE(entry_cnt))
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/* SA TLV has to have atleast only one entry in it so x=8 + y=12 */
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#define PIM_MSDP_SA_TLV_MIN_SIZE PIM_MSDP_SA_ENTRY_CNT2SIZE(1)
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#define PIM_MSDP_SA_MAX_ENTRY_CNT ((PIM_MSDP_SA_TLV_MAX_SIZE - PIM_MSDP_SA_X_SIZE)/PIM_MSDP_SA_ONE_ENTRY_SIZE)
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/* XXX: this is just a guesstimate - need to revist */
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#define PIM_MSDP_MAX_PACKET_SIZE (PIM_MSDP_SA_TLV_MAX_SIZE + PIM_MSDP_KA_TLV_MAX_SIZE)
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#define PIM_MSDP_PKT_TYPE_STRLEN 16
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void pim_msdp_pkt_ka_tx(struct pim_msdp_peer *mp);
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int pim_msdp_read(struct thread *thread);
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void pim_msdp_pkt_sa_tx(void);
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void pim_msdp_pkt_sa_tx_one(struct pim_msdp_sa *sa);
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void pim_msdp_pkt_sa_tx_to_one_peer(struct pim_msdp_peer *mp);
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#endif
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