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zebra: add "show ip rpf" to get result of RPF lookup

Browse Source 
Checking what route exactly a RPF lookup for a given source uses is
essential for an administrator to debug multicast routing issues.  This
command provides exactly that, using the multicst RPF lookup function
and printing out its result to the CLI.

Cc: Everton Marques <everton.marques@gmail.com>
Cc: Balaji G <balajig81@gmail.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2015-01-22 19:12:35 +01:00 committed by Donald Sharp
parent 4623d89737
commit 65dd94cffe
1 changed files with 52 additions and 7 deletions
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59
zebra/zebra_vty.c
View File

@ -39,6 +39,8 @@
extern int allow_delete; extern int allow_delete;
static int do_show_ip_route(struct vty *vty, const char *vrf_name, safi_t safi); static int do_show_ip_route(struct vty *vty, const char *vrf_name, safi_t safi);
static void vty_show_ip_route_detail (struct vty *vty, struct route_node *rn,
int mcast);
/* General function for static route. */ /* General function for static route. */
static int static int
@ -278,6 +280,36 @@ DEFUN (show_ip_rpf,
return do_show_ip_route(vty, VRF_DEFAULT_NAME, SAFI_MULTICAST); return do_show_ip_route(vty, VRF_DEFAULT_NAME, SAFI_MULTICAST);
} }
DEFUN (show_ip_rpf_addr,
show_ip_rpf_addr_cmd,
"show ip rpf A.B.C.D",
SHOW_STR
IP_STR
"Display RPF information for multicast source\n"
"IP multicast source address (e.g. 10.0.0.0)\n")
{
struct in_addr addr;
struct route_node *rn;
struct rib *rib;
int ret;
ret = inet_aton (argv[0], &addr);
if (ret == 0)
{
vty_out (vty, "%% Malformed address%s", VTY_NEWLINE);
return CMD_WARNING;
}
rib = rib_match_ipv4_multicast (addr, &rn);
if (rib)
vty_show_ip_route_detail (vty, rn, 1);
else
vty_out (vty, "%% No match for RPF lookup%s", VTY_NEWLINE);
return CMD_SUCCESS;
}
/* Static route configuration. */ /* Static route configuration. */
DEFUN (ip_route, DEFUN (ip_route,
ip_route_cmd, ip_route_cmd,
@ -1867,7 +1899,7 @@ DEFUN (no_ip_route_mask_flags_tag_distance2_vrf,
/* New RIB. Detailed information for IPv4 route. */ /* New RIB. Detailed information for IPv4 route. */
static void static void
vty_show_ip_route_detail (struct vty *vty, struct route_node *rn) vty_show_ip_route_detail (struct vty *vty, struct route_node *rn, int mcast)
{ {
struct rib *rib; struct rib *rib;
struct nexthop *nexthop, *tnexthop; struct nexthop *nexthop, *tnexthop;
@ -1877,8 +1909,19 @@ vty_show_ip_route_detail (struct vty *vty, struct route_node *rn)
RNODE_FOREACH_RIB (rn, rib) RNODE_FOREACH_RIB (rn, rib)
{ {
vty_out (vty, "Routing entry for %s/%d%s", const char *mcast_info;
inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, if (mcast)
{
rib_table_info_t *info = rn->table->info;
mcast_info = (info->safi == SAFI_MULTICAST)
? " using Multicast RIB"
: " using Unicast RIB";
}
else
mcast_info = "";
vty_out (vty, "Routing entry for %s/%d%s%s",
inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, mcast_info,
VTY_NEWLINE); VTY_NEWLINE);
vty_out (vty, " Known via \"%s", zebra_route_string (rib->type)); vty_out (vty, " Known via \"%s", zebra_route_string (rib->type));
if (rib->instance) if (rib->instance)
@ -2649,7 +2692,7 @@ DEFUN (show_ip_route_addr,
return CMD_WARNING; return CMD_WARNING;
} }
vty_show_ip_route_detail (vty, rn); vty_show_ip_route_detail (vty, rn, 0);
route_unlock_node (rn); route_unlock_node (rn);
@ -2704,7 +2747,7 @@ DEFUN (show_ip_route_prefix,
return CMD_WARNING; return CMD_WARNING;
} }
vty_show_ip_route_detail (vty, rn); vty_show_ip_route_detail (vty, rn, 0);
route_unlock_node (rn); route_unlock_node (rn);
@ -3234,7 +3277,7 @@ DEFUN (show_ip_route_vrf_all_addr,
if (! rn) if (! rn)
continue; continue;
vty_show_ip_route_detail (vty, rn); vty_show_ip_route_detail (vty, rn, 0);
route_unlock_node (rn); route_unlock_node (rn);
} }
@ -3280,7 +3323,7 @@ DEFUN (show_ip_route_vrf_all_prefix,
continue; continue;
} }
vty_show_ip_route_detail (vty, rn); vty_show_ip_route_detail (vty, rn, 0);
route_unlock_node (rn); route_unlock_node (rn);
} }
@ -6012,6 +6055,8 @@ zebra_vty_init (void)
install_element (VIEW_NODE, &show_ip_rpf_cmd); install_element (VIEW_NODE, &show_ip_rpf_cmd);
install_element (ENABLE_NODE, &show_ip_rpf_cmd); install_element (ENABLE_NODE, &show_ip_rpf_cmd);
install_element (VIEW_NODE, &show_ip_rpf_addr_cmd);
install_element (ENABLE_NODE, &show_ip_rpf_addr_cmd);
/* Commands for VRF */ /* Commands for VRF */