mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2017 OpenVPN Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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#ifndef OPENVPN_IP_DHCP_H
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#define OPENVPN_IP_DHCP_H
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#include <openvpn/ip/eth.hpp>
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#include <openvpn/ip/ip4.hpp>
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#include <openvpn/ip/udp.hpp>
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#pragma pack(push)
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#pragma pack(1)
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namespace openvpn {
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struct DHCP {
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enum {
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/* DHCP Option types */
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DHCP_PAD = 0,
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DHCP_NETMASK = 1,
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DHCP_ROUTER = 3,
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DHCP_DNS = 6,
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DHCP_MSG_TYPE = 53 /* message type (u8) */,
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DHCP_END = 255,
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/* DHCP Messages types */
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DHCPDISCOVER = 1,
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DHCPOFFER = 2,
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DHCPREQUEST = 3,
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DHCPDECLINE = 4,
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DHCPACK = 5,
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DHCPNAK = 6,
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DHCPRELEASE = 7,
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DHCPINFORM = 8,
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/* DHCP UDP port numbers */
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BOOTPS_PORT = 67,
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BOOTPC_PORT = 68,
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/* DHCP message op */
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BOOTREQUEST = 1,
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BOOTREPLY = 2,
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};
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std::uint8_t op; /* message op */
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std::uint8_t htype; /* hardware address type (e.g. '1' = 10Mb Ethernet) */
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std::uint8_t hlen; /* hardware address length (e.g. '6' for 10Mb Ethernet) */
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std::uint8_t hops; /* client sets to 0, may be used by relay agents */
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std::uint32_t xid; /* transaction ID, chosen by client */
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std::uint16_t secs; /* seconds since request process began, set by client */
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std::uint16_t flags;
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std::uint32_t ciaddr; /* client IP address, client sets if known */
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std::uint32_t yiaddr; /* 'your' IP address -- server's response to client */
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std::uint32_t siaddr; /* server IP address */
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std::uint32_t giaddr; /* relay agent IP address */
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std::uint8_t chaddr[16]; /* client hardware address */
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std::uint8_t sname[64]; /* optional server host name */
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std::uint8_t file[128]; /* boot file name */
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std::uint32_t magic; /* must be 0x63825363 (network order) */
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};
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struct DHCPPacket {
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EthHeader eth;
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IPv4Header ip;
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UDPHeader udp;
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DHCP dhcp;
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std::uint8_t options[];
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};
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}
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#pragma pack(pop)
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#endif
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