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bgpd: Show BGP prefixes by community alias

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This includes both community/large-community.

Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>
This commit is contained in:
Donatas Abraitis 2021-05-19 17:04:48 +03:00
parent 2794d40202
commit a70a28a577
2 changed files with 98 additions and 41 deletions
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138
bgpd/bgp_route.c
View File

@ -23,6 +23,7 @@
#include <math.h>
#include "printfrr.h"
#include "frrstr.h"
#include "prefix.h"
#include "linklist.h"
#include "memory.h"
@ -10570,7 +10571,6 @@ static int bgp_show_community(struct vty *vty, struct bgp *bgp,
const char *comstr, int exact, afi_t afi,
safi_t safi, uint8_t show_flags);
static int bgp_show_table(struct vty *vty, struct bgp *bgp, safi_t safi,
struct bgp_table *table, enum bgp_show_type type,
void *output_arg, char *rd, int is_last,
@ -10647,6 +10647,48 @@ static int bgp_show_table(struct vty *vty, struct bgp *bgp, safi_t safi,
continue;
}
if (type == bgp_show_type_community_alias) {
char *alias = output_arg;
char **communities;
int num;
bool found = false;
if (pi->attr->community) {
frrstr_split(pi->attr->community->str,
" ", &communities, &num);
for (int i = 0; i < num; i++) {
const char *com2alias =
bgp_community2alias(
communities[i]);
if (strncmp(alias, com2alias,
strlen(com2alias))
== 0) {
found = true;
break;
}
}
}
if (!found && pi->attr->lcommunity) {
frrstr_split(pi->attr->lcommunity->str,
" ", &communities, &num);
for (int i = 0; i < num; i++) {
const char *com2alias =
bgp_community2alias(
communities[i]);
if (strncmp(alias, com2alias,
strlen(com2alias))
== 0) {
found = true;
break;
}
}
}
if (!found)
continue;
}
if (type == bgp_show_type_rpki) {
if (dest_p->family == AF_INET
|| dest_p->family == AF_INET6)
@ -11920,9 +11962,10 @@ DEFPY(show_ip_bgp, show_ip_bgp_cmd,
}
/* BGP route print out function with JSON */
DEFPY (show_ip_bgp_json,
show_ip_bgp_json_cmd,
"show [ip] bgp [<view|vrf> VIEWVRFNAME] ["BGP_AFI_CMD_STR" ["BGP_SAFI_WITH_LABEL_CMD_STR"]]\
DEFPY(show_ip_bgp_json, show_ip_bgp_json_cmd,
"show [ip] bgp [<view|vrf> VIEWVRFNAME] [" BGP_AFI_CMD_STR
" [" BGP_SAFI_WITH_LABEL_CMD_STR
"]]\
[all$all]\
[cidr-only\
|dampening <flap-statistics|dampened-paths>\
@ -11933,44 +11976,41 @@ DEFPY (show_ip_bgp_json,
|route-filter-translated-v4] [exact-match]\
|rpki <invalid|valid|notfound>\
|version (1-4294967295)\
|alias WORD\
] [json$uj [detail$detail] | wide$wide]",
SHOW_STR
IP_STR
BGP_STR
BGP_INSTANCE_HELP_STR
BGP_AFI_HELP_STR
BGP_SAFI_WITH_LABEL_HELP_STR
"Display the entries for all address families\n"
"Display only routes with non-natural netmasks\n"
"Display detailed information about dampening\n"
"Display flap statistics of routes\n"
"Display paths suppressed due to dampening\n"
"Display routes matching the communities\n"
COMMUNITY_AANN_STR
"Do not send outside local AS (well-known community)\n"
"Do not advertise to any peer (well-known community)\n"
"Do not export to next AS (well-known community)\n"
"Graceful shutdown (well-known community)\n"
"Do not export to any peer (well-known community)\n"
"Inform EBGP peers to blackhole traffic to prefix (well-known community)\n"
"Staled Long-lived Graceful Restart VPN route (well-known community)\n"
"Removed because Long-lived Graceful Restart was not enabled for VPN route (well-known community)\n"
"Should accept local VPN route if exported and imported into different VRF (well-known community)\n"
"Should accept VPN route with local nexthop (well-known community)\n"
"RT VPNv6 route filtering (well-known community)\n"
"RT VPNv4 route filtering (well-known community)\n"
"RT translated VPNv6 route filtering (well-known community)\n"
"RT translated VPNv4 route filtering (well-known community)\n"
"Exact match of the communities\n"
"RPKI route types\n"
"A valid path as determined by rpki\n"
"A invalid path as determined by rpki\n"
"A path that has no rpki data\n"
"Display prefixes with matching version numbers\n"
"Version number and above\n"
JSON_STR
"Display detailed version of JSON output\n"
"Increase table width for longer prefixes\n")
SHOW_STR IP_STR BGP_STR BGP_INSTANCE_HELP_STR BGP_AFI_HELP_STR
BGP_SAFI_WITH_LABEL_HELP_STR
"Display the entries for all address families\n"
"Display only routes with non-natural netmasks\n"
"Display detailed information about dampening\n"
"Display flap statistics of routes\n"
"Display paths suppressed due to dampening\n"
"Display routes matching the communities\n" COMMUNITY_AANN_STR
"Do not send outside local AS (well-known community)\n"
"Do not advertise to any peer (well-known community)\n"
"Do not export to next AS (well-known community)\n"
"Graceful shutdown (well-known community)\n"
"Do not export to any peer (well-known community)\n"
"Inform EBGP peers to blackhole traffic to prefix (well-known community)\n"
"Staled Long-lived Graceful Restart VPN route (well-known community)\n"
"Removed because Long-lived Graceful Restart was not enabled for VPN route (well-known community)\n"
"Should accept local VPN route if exported and imported into different VRF (well-known community)\n"
"Should accept VPN route with local nexthop (well-known community)\n"
"RT VPNv6 route filtering (well-known community)\n"
"RT VPNv4 route filtering (well-known community)\n"
"RT translated VPNv6 route filtering (well-known community)\n"
"RT translated VPNv4 route filtering (well-known community)\n"
"Exact match of the communities\n"
"RPKI route types\n"
"A valid path as determined by rpki\n"
"A invalid path as determined by rpki\n"
"A path that has no rpki data\n"
"Display prefixes with matching version numbers\n"
"Version number and above\n"
"Display prefixes with matching BGP community alias\n"
"BGP community alias\n" JSON_STR
"Display detailed version of JSON output\n"
"Increase table width for longer prefixes\n")
{
afi_t afi = AFI_IP6;
safi_t safi = SAFI_UNICAST;
@ -11980,6 +12020,7 @@ DEFPY (show_ip_bgp_json,
int exact_match = 0;
char *community = NULL;
char *prefix_version = NULL;
char *bgp_community_alias = NULL;
bool first = true;
uint8_t show_flags = 0;
enum rpki_states rpki_target_state = RPKI_NOT_BEING_USED;
@ -12056,6 +12097,12 @@ DEFPY (show_ip_bgp_json,
prefix_version = argv[idx + 1]->arg;
}
/* Display prefixes with matching BGP community alias */
if (argv_find(argv, argc, "alias", &idx)) {
sh_type = bgp_show_type_community_alias;
bgp_community_alias = argv[idx + 1]->arg;
}
if (!all) {
/* show bgp: AFI_IP6, show ip bgp: AFI_IP */
if (community)
@ -12066,6 +12113,10 @@ DEFPY (show_ip_bgp_json,
return bgp_show(vty, bgp, afi, safi, sh_type,
prefix_version, show_flags,
rpki_target_state);
else if (bgp_community_alias)
return bgp_show(vty, bgp, afi, safi, sh_type,
bgp_community_alias, show_flags,
rpki_target_state);
else
return bgp_show(vty, bgp, afi, safi, sh_type, NULL,
show_flags, rpki_target_state);
@ -12108,6 +12159,11 @@ DEFPY (show_ip_bgp_json,
sh_type, prefix_version,
show_flags,
rpki_target_state);
else if (bgp_community_alias)
return bgp_show(
vty, bgp, afi, safi, sh_type,
bgp_community_alias, show_flags,
rpki_target_state);
else
bgp_show(vty, bgp, afi, safi, sh_type,
NULL, show_flags,

1
bgpd/bgp_route.h
View File

@ -42,6 +42,7 @@ enum bgp_show_type {
bgp_show_type_neighbor,
bgp_show_type_cidr_only,
bgp_show_type_prefix_longer,
bgp_show_type_community_alias,
bgp_show_type_community_all,
bgp_show_type_community,
bgp_show_type_community_exact,