bgpd: fix show bgp l2vpn evpn route rd crashes

bgpd was crashing every time `show bgp l2vpn evpn route rd` was issued
with an RD that didn't match "all".  This was introduced by 9b01d289883
which changed how argv_find() is handled in various vtysh commands, but
the new changes forgot a "!".  So let's re-add the "!".

Before:
```
ub20# show bgp l2vpn evpn route rd 399672:100
vtysh: error reading from bgpd: Resource temporarily unavailable (11)Warning: closing connection to bgpd because of an I/O error!
ub20#

ub20# show bgp l2vpn evpn route rd 399672:100 mac 11:11:11:11:11:11
vtysh: error reading from bgpd: Resource temporarily unavailable (11)Warning: closing connection to bgpd because of an I/O error!
ub20#
```

After:
```
ub20# show bgp l2vpn evpn route rd 399672:100
ub20#

ub20# show bgp l2vpn evpn route rd 399672:100 mac 11:11:11:11:11:11
% Network not in table
ub20#
```

Signed-off-by: Trey Aspelund <taspelund@nvidia.com>
(cherry picked from commit 8923315db481f2a9f45e76405480edb339738677)

diff --git a/bgpd/bgp_evpn_vty.c b/bgpd/bgp_evpn_vty.c
index d94dcdd362cb349227f33936e26a3595d4e4130e..89fe426a86097d101b99a37ee565c7a8d1661753 100644 (file)
--- a/bgpd/bgp_evpn_vty.c
+++ b/bgpd/bgp_evpn_vty.c
@@ -4700,7 +4700,7 @@ DEFUN(show_bgp_l2vpn_evpn_route_rd,
        if (uj)
                json = json_object_new_object();
 
-       if (argv_find(argv, argc, "all", &rd_all)) {
+       if (!argv_find(argv, argc, "all", &rd_all)) {
                /* get the RD */
                if (argv_find(argv, argc, "ASN:NN_OR_IP-ADDRESS:NN",
                              &idx_ext_community)) {
@@ -4772,7 +4772,7 @@ DEFUN(show_bgp_l2vpn_evpn_route_rd_macip,
                json = json_object_new_object();
 
        /* get the prd */
-       if (argv_find(argv, argc, "all", &rd_all)) {
+       if (!argv_find(argv, argc, "all", &rd_all)) {
                if (argv_find(argv, argc, "ASN:NN_OR_IP-ADDRESS:NN",
                              &idx_ext_community)) {
                        ret = str2prefix_rd(argv[idx_ext_community]->arg, &prd);