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/*
* (C) 2005-2011 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include "internal/internal.h"
static void __build_timeout(struct nfnlhdr *req,
size_t size,
const struct nf_expect *exp)
{
nfnl_addattr32(&req->nlh, size, CTA_EXPECT_TIMEOUT,htonl(exp->timeout));
}
static void __build_zone(struct nfnlhdr *req, size_t size,
const struct nf_expect *exp)
{
nfnl_addattr16(&req->nlh, size, CTA_EXPECT_ZONE, htons(exp->zone));
}
static void __build_flags(struct nfnlhdr *req,
size_t size, const struct nf_expect *exp)
{
nfnl_addattr32(&req->nlh, size, CTA_EXPECT_FLAGS,htonl(exp->flags));
}
static void __build_class(struct nfnlhdr *req,
size_t size,
const struct nf_expect *exp)
{
nfnl_addattr32(&req->nlh, size, CTA_EXPECT_CLASS, htonl(exp->class));
}
static void __build_helper_name(struct nfnlhdr *req, size_t size,
const struct nf_expect *exp)
{
nfnl_addattr_l(&req->nlh, size, CTA_EXPECT_HELP_NAME,
exp->helper_name, strlen(exp->helper_name)+1);
}
static void __build_expectfn(struct nfnlhdr *req,
size_t size, const struct nf_expect *exp)
{
nfnl_addattr_l(&req->nlh, size, CTA_EXPECT_FN,
exp->expectfn, strlen(exp->expectfn)+1);
}
int __build_expect(struct nfnl_subsys_handle *ssh,
struct nfnlhdr *req,
size_t size,
u_int16_t type,
u_int16_t flags,
const struct nf_expect *exp)
{
u_int8_t l3num;
if (test_bit(ATTR_ORIG_L3PROTO, exp->master.set))
l3num = exp->master.orig.l3protonum;
else if (test_bit(ATTR_ORIG_L3PROTO, exp->expected.set))
l3num = exp->expected.orig.l3protonum;
else
return -1;
memset(req, 0, size);
nfnl_fill_hdr(ssh, &req->nlh, 0, l3num, 0, type, flags);
if (test_bit(ATTR_EXP_EXPECTED, exp->set)) {
__build_tuple(req, size, &exp->expected.orig, CTA_EXPECT_TUPLE);
}
if (test_bit(ATTR_EXP_MASTER, exp->set)) {
__build_tuple(req, size, &exp->master.orig, CTA_EXPECT_MASTER);
}
if (test_bit(ATTR_EXP_MASK, exp->set)) {
__build_tuple(req, size, &exp->mask.orig, CTA_EXPECT_MASK);
}
if (test_bit(ATTR_EXP_NAT_TUPLE, exp->set) &&
test_bit(ATTR_EXP_NAT_DIR, exp->set)) {
struct nfattr *nest;
nest = nfnl_nest(&req->nlh, size, CTA_EXPECT_NAT);
__build_tuple(req, size, &exp->nat.orig, CTA_EXPECT_NAT_TUPLE);
nfnl_addattr32(&req->nlh, size, CTA_EXPECT_NAT_DIR,
htonl(exp->nat_dir));
nfnl_nest_end(&req->nlh, nest);
}
if (test_bit(ATTR_EXP_TIMEOUT, exp->set))
__build_timeout(req, size, exp);
if (test_bit(ATTR_EXP_FLAGS, exp->set))
__build_flags(req, size, exp);
if (test_bit(ATTR_EXP_ZONE, exp->set))
__build_zone(req, size, exp);
if (test_bit(ATTR_EXP_CLASS, exp->set))
__build_class(req, size, exp);
if (test_bit(ATTR_EXP_HELPER_NAME, exp->set))
__build_helper_name(req, size, exp);
if (test_bit(ATTR_EXP_FN, exp->set))
__build_expectfn(req, size, exp);
return 0;
}
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