Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

2026-04-24 00:00:05 +08:00 · 2020-02-24 14:43:11 +03:00
parent 133b3756e6 86cc97e55f
commit 32f1555929
655 changed files with 146468 additions and 0 deletions
@@ -0,0 +1,90 @@
+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    as published by the Free Software Foundation.
+//
+//    This program is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef OPENVPN_IP_DHCP_H
+#define OPENVPN_IP_DHCP_H
+
+#include <openvpn/ip/eth.hpp>
+#include <openvpn/ip/ip4.hpp>
+#include <openvpn/ip/udp.hpp>
+
+#pragma pack(push)
+#pragma pack(1)
+
+namespace openvpn {
+  struct DHCP {
+    enum {
+      /* DHCP Option types */
+      DHCP_PAD      =  0,
+      DHCP_NETMASK  =  1,
+      DHCP_ROUTER   =  3,
+      DHCP_DNS      =  6,
+      DHCP_MSG_TYPE =  53  /* message type (u8) */,
+      DHCP_END      =  255,
+
+      /* DHCP Messages types */
+      DHCPDISCOVER =  1,
+      DHCPOFFER    =  2,
+      DHCPREQUEST  =  3,
+      DHCPDECLINE  =  4,
+      DHCPACK      =  5,
+      DHCPNAK      =  6,
+      DHCPRELEASE  =  7,
+      DHCPINFORM   =  8,
+
+      /* DHCP UDP port numbers */
+      BOOTPS_PORT = 67,
+      BOOTPC_PORT = 68,
+
+      /* DHCP message op */
+      BOOTREQUEST = 1,
+      BOOTREPLY   = 2,
+    };
+
+    std::uint8_t  op;         /* message op */
+    std::uint8_t  htype;      /* hardware address type (e.g. '1' = 10Mb Ethernet) */
+    std::uint8_t  hlen;       /* hardware address length (e.g. '6' for 10Mb Ethernet) */
+    std::uint8_t  hops;       /* client sets to 0, may be used by relay agents */
+    std::uint32_t xid;        /* transaction ID, chosen by client */
+    std::uint16_t secs;       /* seconds since request process began, set by client */
+    std::uint16_t flags;
+    std::uint32_t ciaddr;     /* client IP address, client sets if known */
+    std::uint32_t yiaddr;     /* 'your' IP address -- server's response to client */
+    std::uint32_t siaddr;     /* server IP address */
+    std::uint32_t giaddr;     /* relay agent IP address */
+    std::uint8_t  chaddr[16]; /* client hardware address */
+    std::uint8_t  sname[64];  /* optional server host name */
+    std::uint8_t  file[128];  /* boot file name */
+    std::uint32_t magic;      /* must be 0x63825363 (network order) */
+  };
+
+  struct DHCPPacket {
+    EthHeader eth;
+    IPv4Header ip;
+    UDPHeader udp;
+    DHCP dhcp;
+    std::uint8_t options[];
+  };
+}
+
+#pragma pack(pop)
+
+#endif