taglinefilesource code
ttl334drivers/net/slhc.c|| ip->ttl != cs->cs_ip.ttl
ttl105drivers/net/slip.cdlen, ip->ihl, ip->version, ip->ttl, ip->protocol);
ttl74include/linux/ip.hunsigned char    ttl;
ttl98net/inet/ip.cip->id, ip->ttl, ip->protocol, ip->check);
ttl239net/inet/ip.cstruct device **dev, int type, struct options *opt, int len, int ttl,int tos)
ttl305net/inet/ip.ciph->ttl      = ttl;
ttl1238net/inet/ip.ciph->ttl--;
ttl1239net/inet/ip.cif (iph->ttl <= 0) 
ttl73net/inet/ip.hint tos,int ttl);
ttl70net/inet/sockinet.hint ttl, int tos);
ttl2164net/inet/tcp.cnewsk->ip_ttl=skb->ip_hdr->ttl;