taglinefilesource code
ip_fw_chk111include/linux/ip_fw.hextern int ip_fw_chk(struct iphdr *, struct ip_fw *);
ip_fw_chk1285net/inet/ip.cif(!ip_fw_chk(skb->h.iph, ip_fw_fwd_chain))
ip_fw_chk1507net/inet/ip.cif(!LOOPBACK(iph->daddr) && !ip_fw_chk(iph,ip_fw_blk_chain))
ip_fw_chk855net/inet/ip_fw.cif ( ip_fw_chk(ip,