#ifndef included_vnet_dhcp4_packet_h #define included_vnet_dhcp4_packet_h /* * DHCP packet format * * Copyright (c) 2013 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. */ #include <vnet/ip/ip4_packet.h> typedef struct { u8 option; u8 length; union { u8 data[0]; u32 data_as_u32[0]; }; } __attribute__ ((packed)) dhcp_option_t; typedef struct { u8 opcode; /* 1 = request, 2 = reply */ u8 hardware_type; /* 1 = ethernet */ u8 hardware_address_length; u8 hops; u32 transaction_identifier; u16 seconds; u16 flags; #define DHCP_FLAG_BROADCAST (1<<15) ip4_address_t client_ip_address; ip4_address_t your_ip_address; /* use this one */ ip4_address_t server_ip_address; ip4_address_t gateway_ip_address; /* use option 3, not this one */ u8 client_hardware_address[16]; u8 server_name[64]; u8 boot_filename[128]; ip4_address_t magic_cookie; dhcp_option_t options[0]; } dhcp_header_t; extern u8 *format_dhcp_header (u8 * s, va_list * args); typedef enum { DHCP_PACKET_DISCOVER = 1, DHCP_PACKET_OFFER, DHCP_PACKET_REQUEST, DHCP_PACKET_ACK = 5, DHCP_PACKET_NAK, } dhcp_packet_type_t; extern u8 *format_dhcp_packet_type (u8 * s, va_list * args); typedef enum dhcp_packet_option_t_ { DHCP_PACKET_OPTION_MSG_TYPE = 53, DHCP_PACKET_OPTION_END = 0xff, } dhcp_packet_option_t; /* charming antique: 99.130.83.99 is the dhcp magic cookie */ #define DHCP_MAGIC (clib_host_to_net_u32(0x63825363)) #endif /* included_vnet_dhcp4_packet_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */