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/*
* Copyright (c) 2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @brief Common NAT inline functions
*/
#ifndef included_nat_inlines_h__
#define included_nat_inlines_h__
always_inline nat_protocol_t
ip_proto_to_nat_proto (u8 ip_proto)
{
static const nat_protocol_t lookup_table[256] = {
[IP_PROTOCOL_TCP] = NAT_PROTOCOL_TCP,
[IP_PROTOCOL_UDP] = NAT_PROTOCOL_UDP,
[IP_PROTOCOL_ICMP] = NAT_PROTOCOL_ICMP,
[IP_PROTOCOL_ICMP6] = NAT_PROTOCOL_ICMP,
};
return lookup_table[ip_proto];
}
static_always_inline u8
nat_proto_to_ip_proto (nat_protocol_t nat_proto)
{
ASSERT (nat_proto <= NAT_PROTOCOL_ICMP);
static const u8 lookup_table[256] = {
[NAT_PROTOCOL_OTHER] = ~0,
[NAT_PROTOCOL_TCP] = IP_PROTOCOL_TCP,
[NAT_PROTOCOL_UDP] = IP_PROTOCOL_UDP,
[NAT_PROTOCOL_ICMP] = IP_PROTOCOL_ICMP,
};
ASSERT (NAT_PROTOCOL_OTHER == nat_proto || NAT_PROTOCOL_TCP == nat_proto
|| NAT_PROTOCOL_UDP == nat_proto || NAT_PROTOCOL_ICMP == nat_proto);
return lookup_table[nat_proto];
}
static_always_inline u8
icmp_type_is_error_message (u8 icmp_type)
{
switch (icmp_type)
{
case ICMP4_destination_unreachable:
case ICMP4_time_exceeded:
case ICMP4_parameter_problem:
case ICMP4_source_quench:
case ICMP4_redirect:
case ICMP4_alternate_host_address:
return 1;
}
return 0;
}
#endif /* included_nat_inlines_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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