taglinefilesource code
ip_hcache_state207include/net/sock.hint      ip_hcache_state;  /* Have we a cached header */
ip_hcache_state228net/ethernet/eth.csk->ip_hcache_state=0;  /* Try when arp resolves */
ip_hcache_state234net/ethernet/eth.csk->ip_hcache_state=1;
ip_hcache_state3148net/ipv4/ip.csk->ip_hcache_state= 0;
ip_hcache_state3158net/ipv4/ip.cif(rt->rt_dev->header_cache && sk->ip_hcache_state!= -1)
ip_hcache_state3164net/ipv4/ip.csk->ip_hcache_state= -1;
ip_hcache_state3218net/ipv4/ip.cif(sk->ip_hcache_state>0)
ip_hcache_state3383net/ipv4/ip.cif(sk->ip_hcache_state>0)