62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
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#ifndef included_vnet_dhcp_packet_h
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#define included_vnet_dhcp_packet_h
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/*
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* DHCP packet format
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*
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* Copyright (c) 2013 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <vnet/ip/ip4_packet.h>
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typedef struct {
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u8 opcode; /* 1 = request, 2 = reply */
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u8 hardware_type; /* 1 = ethernet */
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u8 hardware_address_length;
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u8 hops;
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u32 transaction_identifier;
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u16 seconds;
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u16 flags;
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#define DHCP_FLAG_BROADCAST (1<<15)
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ip4_address_t client_ip_address;
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ip4_address_t your_ip_address; /* use this one */
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ip4_address_t server_ip_address;
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ip4_address_t gateway_ip_address; /* use option 3, not this one */
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u8 client_hardware_address[16];
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u8 server_name[64];
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u8 boot_filename[128];
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ip4_address_t magic_cookie;
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u8 options[0];
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} dhcp_header_t;
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typedef struct {
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u8 option;
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u8 length;
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union {
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u8 data[0];
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u32 data_as_u32[0];
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};
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} __attribute__((packed)) dhcp_option_t;
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typedef enum {
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DHCP_PACKET_DISCOVER=1,
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DHCP_PACKET_OFFER,
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DHCP_PACKET_REQUEST,
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DHCP_PACKET_ACK=5,
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} dhcp_packet_type_t;
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/* charming antique: 99.130.83.99 is the dhcp magic cookie */
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#define DHCP_MAGIC (clib_host_to_net_u32(0x63825363))
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#endif /* included_vnet_dhcp_packet_h */
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