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fwsGonzofwsGonzo
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Merge pull request #1192 from AnnikaH/dev
DHCP server (IP4)
2 parents 62f01b6 + f11f861 commit ac0ce41

28 files changed

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‎api/net/dhcp/dh4client.hpp‎

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// This file is a part of the IncludeOS unikernel - www.includeos.org
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//
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// Copyright 2015 Oslo and Akershus University College of Applied Sciences
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// Copyright 2015-2017 Oslo and Akershus University College of Applied Sciences
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// and Alfred Bratterud
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//
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// Licensed under the Apache License, Version 2.0 (the "License");

‎api/net/dhcp/dhcp4.hpp‎

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// This file is a part of the IncludeOS unikernel - www.includeos.org
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//
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// Copyright 2015 Oslo and Akershus University College of Applied Sciences
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// Copyright 2015-2017 Oslo and Akershus University College of Applied Sciences
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// and Alfred Bratterud
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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#include <net/ip4/udp.hpp>
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#ifndef NET_DHCP_DHCP4_HPP
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#define NET_DHCP_DHCP4_HPP
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#define DHCP_VEND_LEN 304
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#define BOOTP_MIN_LEN 300
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#define DHCP_MIN_LEN 548
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// some clients silently ignore responses less than 300 bytes
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#define DEFAULT_PACKET_SIZE 300
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#include <net/ip4/udp.hpp>
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namespace net {
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static const int DHCP_VEND_LEN = 304;
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static const int BOOTP_MIN_LEN = 300;
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static const int DHCP_MIN_LEN = 548;
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// some clients silently ignore responses less than 300 bytes
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static const int DEFAULT_PACKET_SIZE = 300;
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namespace net
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{
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struct dhcp_packet_t
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{
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static const int CHADDR_LEN = 16;
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static const int SNAME_LEN = 64;
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static const int FILE_LEN = 128;
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uint8_t op; // message opcode
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uint8_t htype; // hardware addr type
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uint8_t hlen; // hardware addr length
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uint8_t hops; // relay agent hops from client
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uint32_t xid; // transaction ID
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uint16_t secs; // seconds since start
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uint16_t flags; // flag bits
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IP4::addr ciaddr; // client IP address
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IP4::addr yiaddr; // client IP address
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IP4::addr siaddr; // IP address of next server
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IP4::addr giaddr; // DHCP relay agent IP address
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uint8_t chaddr[CHADDR_LEN]; // client hardware address
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uint8_t sname[SNAME_LEN]; // server name
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uint8_t file[FILE_LEN]; // BOOT filename
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uint8_t magic[4]; // option_format aka magic
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uint8_t options[DHCP_VEND_LEN];
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};
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struct dhcp_option_t
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{
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uint8_t code;
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uint8_t length;
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uint8_t val[0];
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};
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}
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struct dhcp_packet_t
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{
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static const uint8_t CHADDR_LEN = 16;
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static const uint8_t SNAME_LEN = 64;
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static const uint8_t FILE_LEN = 128;
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uint8_t op; // message opcode
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uint8_t htype; // hardware addr type
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uint8_t hlen; // hardware addr length
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uint8_t hops; // relay agent hops from client
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uint32_t xid; // transaction ID
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uint16_t secs; // seconds since start
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uint16_t flags; // flag bits
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IP4::addr ciaddr; // client IP address
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IP4::addr yiaddr; // client IP address
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IP4::addr siaddr; // IP address of next server
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IP4::addr giaddr; // DHCP relay agent IP address
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uint8_t chaddr[CHADDR_LEN]; // client hardware address
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uint8_t sname[SNAME_LEN]; // server name
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uint8_t file[FILE_LEN]; // BOOT filename
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uint8_t magic[4]; // option_format aka magic
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dhcp_option_t options[0];
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};
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static const uint16_t PACKET_SIZE = sizeof(dhcp_packet_t) + DHCP_VEND_LEN;
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// BOOTP (rfc951) message types
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static const uint8_t BOOTREQUEST = 1;
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static const uint8_t BOOTREPLY = 2;
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// Possible values for flags field
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static const uint32_t BOOTP_UNICAST = 0x0000;
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static const uint32_t BOOTP_BROADCAST = 0x0080;
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// Possible values for hardware type (htype) field
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static const uint8_t HTYPE_ETHER = 1; // Ethernet 10Mbps
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static const uint8_t HTYPE_IEEE802 = 6; // IEEE 802.2 Token Ring
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static const uint8_t HTYPE_FDDI = 8; // FDDI
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static const uint8_t HTYPE_HFI = 37; // HFI
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/* Magic cookie validating dhcp options field (and bootp vendor
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extensions field). */
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static const std::string DHCP_OPTIONS_COOKIE = "\143\202\123\143";
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// DHCP Option codes
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static const uint8_t DHO_PAD = 0;
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static const uint8_t DHO_SUBNET_MASK = 1;
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static const uint8_t DHO_TIME_OFFSET = 2;
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static const uint8_t DHO_ROUTERS = 3;
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static const uint8_t DHO_TIME_SERVERS = 4;
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static const uint8_t DHO_NAME_SERVERS = 5;
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static const uint8_t DHO_DOMAIN_NAME_SERVERS = 6;
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static const uint8_t DHO_LOG_SERVERS = 7;
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static const uint8_t DHO_COOKIE_SERVERS = 8;
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static const uint8_t DHO_LPR_SERVERS = 9;
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static const uint8_t DHO_IMPRESS_SERVERS = 10;
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static const uint8_t DHO_RESOURCE_LOCATION_SERVERS = 11;
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static const uint8_t DHO_HOST_NAME = 12;
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static const uint8_t DHO_BOOT_SIZE = 13;
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static const uint8_t DHO_MERIT_DUMP = 14;
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static const uint8_t DHO_DOMAIN_NAME = 15;
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static const uint8_t DHO_SWAP_SERVER = 16;
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static const uint8_t DHO_ROOT_PATH = 17;
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static const uint8_t DHO_EXTENSIONS_PATH = 18;
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static const uint8_t DHO_IP_FORWARDING = 19;
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static const uint8_t DHO_NON_LOCAL_SOURCE_ROUTING = 20;
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static const uint8_t DHO_POLICY_FILTER = 21;
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static const uint8_t DHO_MAX_DGRAM_REASSEMBLY = 22;
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static const uint8_t DHO_DEFAULT_IP_TTL = 23;
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static const uint8_t DHO_PATH_MTU_AGING_TIMEOUT = 24;
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static const uint8_t DHO_PATH_MTU_PLATEAU_TABLE = 25;
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static const uint8_t DHO_INTERFACE_MTU = 26;
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static const uint8_t DHO_ALL_SUBNETS_LOCAL = 27;
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static const uint8_t DHO_BROADCAST_ADDRESS = 28;
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static const uint8_t DHO_PERFORM_MASK_DISCOVERY = 29;
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static const uint8_t DHO_MASK_SUPPLIER = 30;
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static const uint8_t DHO_ROUTER_DISCOVERY = 31;
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static const uint8_t DHO_ROUTER_SOLICITATION_ADDRESS = 32;
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static const uint8_t DHO_STATIC_ROUTES = 33;
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static const uint8_t DHO_TRAILER_ENCAPSULATION = 34;
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static const uint8_t DHO_ARP_CACHE_TIMEOUT = 35;
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static const uint8_t DHO_IEEE802_3_ENCAPSULATION = 36;
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static const uint8_t DHO_DEFAULT_TCP_TTL = 37;
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static const uint8_t DHO_TCP_KEEPALIVE_INTERVAL = 38;
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static const uint8_t DHO_TCP_KEEPALIVE_GARBAGE = 39;
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static const uint8_t DHO_NIS_DOMAIN = 40;
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static const uint8_t DHO_NIS_SERVERS = 41;
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static const uint8_t DHO_NTP_SERVERS = 42;
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static const uint8_t DHO_VENDOR_ENCAPSULATED_OPTIONS = 43;
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static const uint8_t DHO_NETBIOS_NAME_SERVERS = 44;
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static const uint8_t DHO_NETBIOS_DD_SERVER = 45;
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static const uint8_t DHO_NETBIOS_NODE_TYPE = 46;
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static const uint8_t DHO_NETBIOS_SCOPE = 47;
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static const uint8_t DHO_FONT_SERVERS = 48;
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static const uint8_t DHO_X_DISPLAY_MANAGER = 49;
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static const uint8_t DHO_DHCP_REQUESTED_ADDRESS = 50;
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static const uint8_t DHO_DHCP_LEASE_TIME = 51;
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static const uint8_t DHO_DHCP_OPTION_OVERLOAD = 52;
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static const uint8_t DHO_DHCP_MESSAGE_TYPE = 53;
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static const uint8_t DHO_DHCP_SERVER_IDENTIFIER = 54;
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static const uint8_t DHO_DHCP_PARAMETER_REQUEST_LIST = 55;
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static const uint8_t DHO_DHCP_MESSAGE = 56;
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static const uint8_t DHO_DHCP_MAX_MESSAGE_SIZE = 57;
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static const uint8_t DHO_DHCP_RENEWAL_TIME = 58;
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static const uint8_t DHO_DHCP_REBINDING_TIME = 59;
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static const uint8_t DHO_VENDOR_CLASS_IDENTIFIER = 60;
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static const uint8_t DHO_DHCP_CLIENT_IDENTIFIER = 61;
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static const uint8_t DHO_NWIP_DOMAIN_NAME = 62;
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static const uint8_t DHO_NWIP_SUBOPTIONS = 63;
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static const uint8_t DHO_USER_CLASS = 77;
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static const uint8_t DHO_FQDN = 81;
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static const uint8_t DHO_DHCP_AGENT_OPTIONS = 82;
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static const uint8_t DHO_SUBNET_SELECTION = 118; // RFC3011
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/* The DHO_AUTHENTICATE option is not a standard yet, so I've
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allocated an option out of the "local" option space for it on a
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temporary basis. Once an option code number is assigned, I will
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immediately and shamelessly break this, so don't count on it
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continuing to work. */
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static const uint8_t DHO_AUTHENTICATE = 210;
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static const uint8_t DHO_END = 255;
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// DHCP message types
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static const uint8_t DHCPDISCOVER = 1;
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static const uint8_t DHCPOFFER = 2;
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static const uint8_t DHCPREQUEST = 3;
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static const uint8_t DHCPDECLINE = 4;
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static const uint8_t DHCPACK = 5;
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static const uint8_t DHCPNAK = 6;
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static const uint8_t DHCPRELEASE = 7;
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static const uint8_t DHCPINFORM = 8;
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// Relay Agent Information option subtypes
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static const uint8_t RAI_CIRCUIT_ID = 1;
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static const uint8_t RAI_REMOTE_ID = 2;
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static const uint8_t RAI_AGENT_ID = 3;
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// FQDN suboptions
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static const uint8_t FQDN_NO_CLIENT_UPDATE = 1;
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static const uint8_t FQDN_SERVER_UPDATE = 2;
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static const uint8_t FQDN_ENCODED = 3;
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static const uint8_t FQDN_RCODE1 = 4;
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static const uint8_t FQDN_RCODE2 = 5;
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static const uint8_t FQDN_HOSTNAME = 6;
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static const uint8_t FQDN_DOMAINNAME = 7;
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static const uint8_t FQDN_FQDN = 8;
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static const uint8_t FQDN_SUBOPTION_COUNT = 8;
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static const uint8_t ETH_ALEN = 6; // octets in one ethernet header
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static const uint8_t DHCP_SERVER_PORT = 67;
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static const uint8_t DHCP_CLIENT_PORT = 68;
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static inline dhcp_option_t* conv_option(dhcp_option_t* option, int offset)
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{
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return (dhcp_option_t*) ((char*) option + offset);
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}
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static inline const dhcp_option_t* get_option(const dhcp_option_t* opts, uint8_t code)
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{
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const dhcp_option_t* opt = opts;
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while (opt->code != code && opt->code != DHO_END)
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{
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// go to next option
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opt = (const dhcp_option_t*) (((const uint8_t*) opt) + 2 + opt->length);
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}
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return opt;
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}
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} // < namespace net
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#endif

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