static int __init nf_nat_standalone_init(void)
{
int ret = 0;
need_ipv4_conntrack();
#ifdef CONFIG_XFRM
BUG_ON(ip_nat_decode_session != NULL);
rcu_assign_pointer_nonull(ip_nat_decode_session, nat_decode_session);
#endif
ret = nf_nat_rule_init();
if (ret < 0) {
pr_err("nf_nat_init: can't setup rules.\n");
goto cleanup_decode_session;
}
ret = nf_register_hooks(nf_nat_ops, ARRAY_SIZE(nf_nat_ops));
if (ret < 0) {
pr_err("nf_nat_init: can't register hooks.\n");
goto cleanup_rule_init;
}
return ret;
cleanup_rule_init:
nf_nat_rule_cleanup();
cleanup_decode_session:
#ifdef CONFIG_XFRM
rcu_assign_pointer(ip_nat_decode_session, NULL);
synchronize_net();
#endif
return ret;
}
int __init nat64_init(void)
{
pr_debug("\n\n\n%s", banner);
pr_debug("\n\nNAT64 module inserted!");
// Load default configuration
init_nat_config(&cs);
/*
* Include nf_conntrack dependency
*/
need_conntrack();
/*
* Include nf_conntrack_ipv4 dependency.
* IPv4 conntrack is needed in order to handle complete packets, and not
* fragments.
*/
need_ipv4_conntrack();
nat64_determine_incoming_tuple_init();
// BEGIN: code imported from nat64_init of Julius Kriukas' implementation
// Init IPv4 addresses pool
init_pools(&cs); // Bernardo
nat64_create_bib_session_memory();
pr_debug("NAT64: The bib table slab cache was succesfully created.");
// END: code imported from nat64_init of Julius Kriukas' implementation
nat64_create_character_device();
// Load netlink sockets. Rob
// BEGIN
// Create netlink socket, register 'my_nl_rcv_msg' as callback function. // Rob
my_nl_sock = netlink_kernel_create(&init_net, NETLINK_USERSOCK, 0,
my_nl_rcv_msg, NULL, THIS_MODULE);
if (!my_nl_sock)
{
pr_warning("NAT64: %s: Creation of netlink socket failed.\n", __func__);
goto error;
}
// END
return xt_register_target(&nat64_tg_reg);
// The following goto were inspired by Julius Kriukas' nat64_init's goto
error:
return -EINVAL;
}