PBlock variables are not printing properly with custom format.

[gabrielmocan]

Hi Pete,

I'm experimenting with NAT/NSEL stuff, and I came across something:

root# nfdump -r nfcapd.202404301201 -o json
[
{
	"type" : "EVENT",
	"export_sysid" : 1,
	"first" : "2024-04-30T12:01:02.332",
	"last" : "2024-04-30T12:01:02.332",
	"received" : "2024-04-30T12:01:26.719",
	"in_packets" : 0,
	"in_bytes" : 0,
	"proto" : 17,
	"tcp_flags" : "........",
	"src_port" : 0,
	"dst_port" : 0,
	"fwd_status" : 0,
	"src_tos" : 0,
	"src4_addr" : "100.66.79.193",
	"dst4_addr" : "0.0.0.0",
	"src4_geo" : "",
	"dst4_geo" : "",
	"ip4_router" : "suppressed",
	"src4_xlt_ip" : "suppressed",
	"dst4_xlt_ip" : "0.0.0.0",
	"nat_event_id" : 1,
	"nat_event" : "NAT translation create",
	"nat_pool_id" : 0,
	"t_event" : "2024-04-30T12:01:02.332",
	"pblock_start" : 1536,
	"pblock_end" : 0,
	"pblock_step" : 1,
	"pblock_size" : 512,
	"ingress_vrf" : 0,
	"egress_vrf" : 0,
	"sampled" : 0
},
{
	"type" : "EVENT",
	"export_sysid" : 1,
	"first" : "2024-04-30T12:01:02.356",
	"last" : "2024-04-30T12:01:02.356",
	"received" : "2024-04-30T12:01:26.719",
	"in_packets" : 0,
	"in_bytes" : 0,
	"proto" : 6,
	"tcp_flags" : "........",
	"src_port" : 0,
	"dst_port" : 0,
	"fwd_status" : 0,
	"src_tos" : 0,
	"src4_addr" : "100.66.79.193",
	"dst4_addr" : "0.0.0.0",
	"src4_geo" : "",
	"dst4_geo" : "",
	"ip4_router" : "suppressed",
	"src4_xlt_ip" : "suppressed",
	"dst4_xlt_ip" : "0.0.0.0",
	"nat_event_id" : 1,
	"nat_event" : "NAT translation create",
	"nat_pool_id" : 0,
	"t_event" : "2024-04-30T12:01:02.356",
	"pblock_start" : 1536,
	"pblock_end" : 0,
	"pblock_step" : 1,
	"pblock_size" : 512,
	"ingress_vrf" : 0,
	"egress_vrf" : 0,
	"sampled" : 0
}]

Now with custom format:

root# nfdump -Nq -r nfcapd.202404301201 -o "fmt:%evt %msec %sa %xsa %pbstart %pbend %pbstep %pbsize"
1 1714489262332 100.66.79.193 suppressed       0       0       0       0
1 1714489262356 100.66.79.193 suppressed       0       0       0       0