taglinefilesource code
o_sm910net/ipv4/ip_fw.cunsigned long n_sa,n_da,o_sa,o_da,o_sm,o_dm,n_sm,n_dm;
o_sm969net/ipv4/ip_fw.co_sm=ntohl(chtmp->fw_smsk.s_addr);
o_sm972net/ipv4/ip_fw.cm_src_mask = o_sm & n_sm;
o_sm977net/ipv4/ip_fw.cif (n_sm > o_sm) 
o_sm979net/ipv4/ip_fw.cif (n_sm < o_sm) 
o_sm992net/ipv4/ip_fw.c&&((o_sa & o_sm) == (n_sa & n_sm)))