forked from Mirror/frr
17571c4ae7
Each BGP prefix may have an as-path list attached. A forged
string is stored in the BGP attribute and shows the as-path
list output.
Before this commit, the as-path list output was expressed as
a list of AS values in plain format. Now, if a given BGP instance
uses a specific asnotation, then the output is changed:
new output:
router bgp 1.1 asnotation dot
!
address-family ipv4 unicast
network 10.200.0.0/24 route-map rmap
network 10.201.0.0/24 route-map rmap
redistribute connected route-map rmap
exit-address-family
exit
!
route-map rmap permit 1
set as-path prepend 1.1 5433.55 264564564
exit
ubuntu2004# do show bgp ipv4
BGP table version is 2, local router ID is 10.0.2.15, vrf id 0
Default local pref 100, local AS 1.1
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*> 4.4.4.4/32 0.0.0.0 0 32768 1.1 5433.55 4036.61268 ?
*> 10.0.2.0/24 0.0.0.0 0 32768 1.1 5433.55 4036.61268 ?
10.200.0.0/24 0.0.0.0 0 32768 1.1 5433.55 4036.61268 i
10.201.0.0/24 0.0.0.0 0 32768 1.1 5433.55 4036.61268 i
The changes include:
- the aspath structure has a new field: asnotation type
The ashash list will differentiate 2 aspaths using a different
asnotation.
- 3 new printf extensions display the as number in the wished
format: pASP, pASD, pASE for plain, dot, or dot+ format (extended).
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
74 lines
2 KiB
C
74 lines
2 KiB
C
/*
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* AS number structure
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* Copyright 2022 6WIND
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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
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2, or (at your
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* option) 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 _FRR_ASN_H
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#define _FRR_ASN_H
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#include "zebra.h"
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#include "command_match.h"
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#include "json.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ASN_STRING_MAX_SIZE 12
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enum asnotation_mode {
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ASNOTATION_PLAIN = 0,
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ASNOTATION_DOT,
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ASNOTATION_DOTPLUS,
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ASNOTATION_UNDEFINED,
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};
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typedef uint32_t as_t;
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extern bool asn_str2asn(const char *asstring, as_t *asn);
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extern const char *asn_asn2asplain(as_t asn);
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extern const char *asn_str2asn_parse(const char *asstring, as_t *asn,
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bool *found_ptr);
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extern enum match_type asn_str2asn_match(const char *str);
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extern bool asn_str2asn_notation(const char *asstring, as_t *asn,
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enum asnotation_mode *asnotation);
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extern const char *asn_mode2str(enum asnotation_mode asnotation);
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void asn_asn2json_array(json_object *jseg_list, as_t asn,
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enum asnotation_mode asnotation);
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/* display AS in appropriate format */
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#ifdef _FRR_ATTRIBUTE_PRINTFRR
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#pragma FRR printfrr_ext "%pASP" (as_t *)
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#pragma FRR printfrr_ext "%pASD" (as_t *)
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#pragma FRR printfrr_ext "%pASE" (as_t *)
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#endif
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#define ASN_FORMAT(mode) \
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((mode == ASNOTATION_DOT) ? "%pASD" : \
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((mode == ASNOTATION_DOTPLUS) ? "%pASE" : \
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"%pASP"))
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/* for test */
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extern void asn_relax_as_zero(bool relax);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FRR_ASN_H */
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