ping_prot 51 include/net/ping.h extern struct proto ping_prot; ping_prot 1110 net/ipv4/af_inet.c .prot = &ping_prot, ping_prot 1929 net/ipv4/af_inet.c rc = proto_register(&ping_prot, 1); ping_prot 988 net/ipv4/ping.c struct proto ping_prot = { ping_prot 1007 net/ipv4/ping.c EXPORT_SYMBOL(ping_prot);