taglinefilesource code
ETH_P_IP435drivers/net/plip.cif (eth->h_proto != htons(ETH_P_IP)) {
ETH_P_IP1810drivers/net/ppp.creturn(htons(ETH_P_IP));
ETH_P_IP489drivers/net/slip.creturn htons(ETH_P_IP);
ETH_P_IP335net/inet/arp.carp->ar_pro = (dev->type != ARPHRD_AX25)? htons(ETH_P_IP) : htons(AX25_P_IP);
ETH_P_IP337net/inet/arp.carp->ar_pro = htons(ETH_P_IP);
ETH_P_IP567net/inet/arp.cif(arp->ar_pro != htons(ETH_P_IP))
ETH_P_IP142net/inet/eth.cif(eth->h_proto != htons(ETH_P_IP)) 
ETH_P_IP171net/inet/ip.cmac = dev->hard_header(skb->data, dev, ETH_P_IP, NULL, NULL, len, skb);
ETH_P_IP2018net/inet/ip.cip_packet_type.type=htons(ETH_P_IP);
ETH_P_IP203net/inet/rarp.c(rarp->ar_pro != htons(ETH_P_IP) && dev->type != ARPHRD_AX25)