fping error: not enough sequence numbers available!

[Andrew Cagney]

Hi,

Any suggestions on what could cause the error:

    fping error: not enough sequence numbers available!

I'm trying to track down a problem with an IPsec connection that has just come up and am seeing:

# fping  -c 1  --timeout 5s   --src 192.0.1.254 192.0.2.254

fping error: not enough sequence numbers available! (expire_timeout=10000000000, host_nr=0, ping_count=0, seqmap_next_id=0)

# sleep 10

fping  -c 1  --timeout 5s   --src 192.0.1.254 192.0.2.254
192.0.2.254 : [0], 64 bytes, 0.468 ms (0.468 avg, 0% loss)
192.0.2.254 : xmt/rcv/%loss = 1/1/0%, min/avg/max = 0.468/0.468/0.468

(host is freebsd, fping 5.0 it seems)

[Andrew Cagney]

Note, it isn't IPsec.  For instance, in the below test output which is taken immediately after boot:

- FreeBSD's ping works

- fping fails

- sleep 5

- fping works

@@ -11,9 +11,17 @@
 ipsec.conf -> PATH/etc/ipsec.conf
 ipsec.secrets -> PATH/etc/ipsec.secrets
 freebsdw# ping -c 1 192.1.2.23
+PING 192.1.2.23 (192.1.2.23): 56 data bytes
+64 bytes from 192.1.2.23: icmp_seq=0 ttl=64 time=0.XXX ms
+--- 192.1.2.23 ping statistics ---
+1 packets transmitted, 1 packets received, 0.0% packet loss
+round-trip min/avg/max/stddev = 0.398/0.398/0.398/0.000 ms
 freebsdw# fping -c 1 192.1.2.23
+fping error: not enough sequence numbers available! (expire_timeout=10000000000, host_nr=0, ping_count=0, seqmap_next_id=0)
 freebsdw# sleep 5
 freebsdw# fping -c 1 192.1.2.23
+192.1.2.23 : [0], 64 bytes, 0.417 ms (0.417 avg, 0% loss)
+192.1.2.23 : xmt/rcv/%loss = 1/1/0%, min/avg/max = 0.417/0.417/0.417
 freebsdw# ipsec start
 Redirecting to: [initsystem]
 Initializing NSS database