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- Function "zfpm_netlink_encode_mac()" builds a netlink message for RMAC updates.
- To build a netlink message for RMAC updates, we use "ndmsg" in rtlink.
- FPM Message structure is:
FPM header -> nlmsg header -> ndmsg fields -> ndmsg attributes
- Netlink message will look like:
{'ndm_type': 0, 'family': 7, '__pad': (), 'header': {'flags': 1281,
'length':64, 'type': 28, 'pid': 0, 'sequence_number': 0}, 'state': 2,
'flags': 22, 'attrs': [('NDA_LLADDR', 'b2:66:eb:b9:5b:d3'),
('NDA_DST', '10.100.0.2'), ('NDA_MASTER', 11), ('NDA_VNI', 1000)],
'ifindex': 18}
- Message details:
nlmsghdr.nlmsg_type = RTM_NEWNEIGH(28) or RTM_DELNEIGH(29)
nlmsghdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE for "add" ,
"NLM_F_REQUEST" for delete.
ndmsg.ndm_family = AF_BRIDGE
ndmsg.ndm_ifindex = vxlan_if (ifindex)
ndmsg.ndm_state = NUD_REACHABLE
ndmsg.ndm_flags |= NTF_SELF | NTF_MASTER | NTF_EXT_LEARNED
Attribute "NDA_LLADDR" for MAC address
Attribute "NDA_DST" for remote vtep ip
Attribute "NDA_MASTER" for bridge interface ifindex.
Attribute "NDA_VNI" for VNI id.
Signed-off-by: Ameya Dharkar <adharkar@vmware.com>
105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
/*
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* Private header file for the zebra FPM module.
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*
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* Copyright (C) 2012 by Open Source Routing.
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* Copyright (C) 2012 by Internet Systems Consortium, Inc. ("ISC")
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* GNU Zebra 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 along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _ZEBRA_FPM_PRIVATE_H
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#define _ZEBRA_FPM_PRIVATE_H
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#include "zebra/debug.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
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#define zfpm_debug(...) \
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do { \
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if (IS_ZEBRA_DEBUG_FPM) \
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zlog_debug("FPM: " __VA_ARGS__); \
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} while (0)
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#elif defined __GNUC__
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#define zfpm_debug(_args...) \
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do { \
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if (IS_ZEBRA_DEBUG_FPM) \
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zlog_debug("FPM: " _args); \
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} while (0)
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#else
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static inline void zfpm_debug(const char *format, ...)
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{
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return;
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}
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#endif
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/* This structure contains the MAC addresses enqueued for FPM processing. */
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struct fpm_mac_info_t {
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struct ethaddr macaddr;
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uint32_t zebra_flags; /* Could be used to build FPM messages */
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vni_t vni;
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ifindex_t vxlan_if;
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ifindex_t svi_if; /* L2 or L3 Bridge interface */
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struct in_addr r_vtep_ip; /* Remote VTEP IP */
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/* Linkage to put MAC on the FPM processing queue. */
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TAILQ_ENTRY(fpm_mac_info_t) fpm_mac_q_entries;
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uint8_t fpm_flags;
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#define ZEBRA_MAC_UPDATE_FPM 0x1 /* This flag indicates if we want to upadte
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* data plane for this MAC. If a MAC is added
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* and then deleted immediately, we do not want
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* to update data plane for such operation.
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* Unset the ZEBRA_MAC_UPDATE_FPM flag in this
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* case. FPM thread while processing the queue
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* node will check this flag and dequeue the
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* node silently without sending any update to
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* the data plane.
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*/
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#define ZEBRA_MAC_DELETE_FPM 0x2 /* This flag is set if it is a delete operation
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* for the MAC.
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*/
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};
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/*
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* Externs
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*/
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extern int zfpm_netlink_encode_route(int cmd, rib_dest_t *dest,
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struct route_entry *re, char *in_buf,
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size_t in_buf_len);
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extern int zfpm_protobuf_encode_route(rib_dest_t *dest, struct route_entry *re,
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uint8_t *in_buf, size_t in_buf_len);
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extern int zfpm_netlink_encode_mac(struct fpm_mac_info_t *mac, char *in_buf,
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size_t in_buf_len);
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extern struct route_entry *zfpm_route_for_update(rib_dest_t *dest);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ZEBRA_FPM_PRIVATE_H */
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