329 lines
9.2 KiB
C
329 lines
9.2 KiB
C
/* $OpenBSD: dhcpleased.h,v 1.16 2024/01/26 21:14:08 jan Exp $ */
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/*
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* Copyright (c) 2017, 2021 Florian Obser <florian@openbsd.org>
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* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
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* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#define _PATH_LOCKFILE "/dev/dhcpleased.lock"
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#define _PATH_CONF_FILE "/etc/dhcpleased.conf"
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#define _PATH_DHCPLEASED_SOCKET "/dev/dhcpleased.sock"
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#define DHCPLEASED_USER "_dhcp"
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#define DHCPLEASED_RTA_LABEL "dhcpleased"
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#define SERVER_PORT 67
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#define CLIENT_PORT 68
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#define _PATH_LEASE "/var/db/dhcpleased/"
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#define LEASE_VERSION "version: 2"
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#define LEASE_IP_PREFIX "ip: "
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#define LEASE_NEXTSERVER_PREFIX "next-server: "
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#define LEASE_BOOTFILE_PREFIX "filename: "
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#define LEASE_HOSTNAME_PREFIX "host-name: "
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#define LEASE_DOMAIN_PREFIX "domain-name: "
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#define LEASE_SIZE 4096
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/* MAXDNAME from arpa/namesr.h */
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#define DHCPLEASED_MAX_DNSSL 1025
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#define MAX_RDNS_COUNT 8 /* max nameserver in a RTM_PROPOSAL */
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/* A 1500 bytes packet can hold less than 300 classless static routes */
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#define MAX_DHCP_ROUTES 256
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#define DHCP_COOKIE {99, 130, 83, 99}
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/* Possible values for hardware type (htype) field. */
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#define HTYPE_NONE 0
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#define HTYPE_ETHER 1
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#define HTYPE_IPSEC_TUNNEL 31
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/* DHCP op code */
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#define DHCP_BOOTREQUEST 1
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#define DHCP_BOOTREPLY 2
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/* DHCP Option codes: */
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#define DHO_PAD 0
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#define DHO_SUBNET_MASK 1
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#define DHO_TIME_OFFSET 2
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#define DHO_ROUTERS 3
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#define DHO_TIME_SERVERS 4
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#define DHO_NAME_SERVERS 5
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#define DHO_DOMAIN_NAME_SERVERS 6
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#define DHO_LOG_SERVERS 7
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#define DHO_COOKIE_SERVERS 8
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#define DHO_LPR_SERVERS 9
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#define DHO_IMPRESS_SERVERS 10
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#define DHO_RESOURCE_LOCATION_SERVERS 11
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#define DHO_HOST_NAME 12
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#define DHO_BOOT_SIZE 13
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#define DHO_MERIT_DUMP 14
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#define DHO_DOMAIN_NAME 15
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#define DHO_SWAP_SERVER 16
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#define DHO_ROOT_PATH 17
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#define DHO_EXTENSIONS_PATH 18
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#define DHO_IP_FORWARDING 19
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#define DHO_NON_LOCAL_SOURCE_ROUTING 20
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#define DHO_POLICY_FILTER 21
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#define DHO_MAX_DGRAM_REASSEMBLY 22
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#define DHO_DEFAULT_IP_TTL 23
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#define DHO_PATH_MTU_AGING_TIMEOUT 24
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#define DHO_PATH_MTU_PLATEAU_TABLE 25
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#define DHO_INTERFACE_MTU 26
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#define DHO_ALL_SUBNETS_LOCAL 27
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#define DHO_BROADCAST_ADDRESS 28
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#define DHO_PERFORM_MASK_DISCOVERY 29
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#define DHO_MASK_SUPPLIER 30
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#define DHO_ROUTER_DISCOVERY 31
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#define DHO_ROUTER_SOLICITATION_ADDRESS 32
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#define DHO_STATIC_ROUTES 33
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#define DHO_TRAILER_ENCAPSULATION 34
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#define DHO_ARP_CACHE_TIMEOUT 35
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#define DHO_IEEE802_3_ENCAPSULATION 36
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#define DHO_DEFAULT_TCP_TTL 37
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#define DHO_TCP_KEEPALIVE_INTERVAL 38
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#define DHO_TCP_KEEPALIVE_GARBAGE 39
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#define DHO_NIS_DOMAIN 40
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#define DHO_NIS_SERVERS 41
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#define DHO_NTP_SERVERS 42
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#define DHO_VENDOR_ENCAPSULATED_OPTIONS 43
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#define DHO_NETBIOS_NAME_SERVERS 44
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#define DHO_NETBIOS_DD_SERVER 45
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#define DHO_NETBIOS_NODE_TYPE 46
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#define DHO_NETBIOS_SCOPE 47
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#define DHO_FONT_SERVERS 48
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#define DHO_X_DISPLAY_MANAGER 49
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#define DHO_DHCP_REQUESTED_ADDRESS 50
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#define DHO_DHCP_LEASE_TIME 51
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#define DHO_DHCP_OPTION_OVERLOAD 52
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#define DHO_DHCP_MESSAGE_TYPE 53
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#define DHO_DHCP_SERVER_IDENTIFIER 54
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#define DHO_DHCP_PARAMETER_REQUEST_LIST 55
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#define DHO_DHCP_MESSAGE 56
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#define DHO_DHCP_MAX_MESSAGE_SIZE 57
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#define DHO_DHCP_RENEWAL_TIME 58
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#define DHO_DHCP_REBINDING_TIME 59
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#define DHO_DHCP_CLASS_IDENTIFIER 60
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#define DHO_DHCP_CLIENT_IDENTIFIER 61
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#define DHO_NISPLUS_DOMAIN 64
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#define DHO_NISPLUS_SERVERS 65
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#define DHO_TFTP_SERVER 66
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#define DHO_BOOTFILE_NAME 67
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#define DHO_MOBILE_IP_HOME_AGENT 68
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#define DHO_SMTP_SERVER 69
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#define DHO_POP_SERVER 70
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#define DHO_NNTP_SERVER 71
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#define DHO_WWW_SERVER 72
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#define DHO_FINGER_SERVER 73
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#define DHO_IRC_SERVER 74
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#define DHO_STREETTALK_SERVER 75
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#define DHO_STREETTALK_DIRECTORY_ASSISTANCE_SERVER 76
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#define DHO_DHCP_USER_CLASS_ID 77
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#define DHO_RELAY_AGENT_INFORMATION 82
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#define DHO_NDS_SERVERS 85
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#define DHO_NDS_TREE_NAME 86
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#define DHO_NDS_CONTEXT 87
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#define DHO_IPV6_ONLY_PREFERRED 108
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#define DHO_DOMAIN_SEARCH 119
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#define DHO_CLASSLESS_STATIC_ROUTES 121
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#define DHO_TFTP_CONFIG_FILE 144
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#define DHO_VOIP_CONFIGURATION_SERVER 150
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#define DHO_CLASSLESS_MS_STATIC_ROUTES 249
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#define DHO_AUTOPROXY_SCRIPT 252
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#define DHO_END 255
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#define DHO_COUNT 256 /* # of DHCP options */
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/* DHCP message types. */
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#define DHCPDISCOVER 1
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#define DHCPOFFER 2
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#define DHCPREQUEST 3
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#define DHCPDECLINE 4
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#define DHCPACK 5
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#define DHCPNAK 6
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#define DHCPRELEASE 7
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#define DHCPINFORM 8
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/* Ignore parts of DHCP lease */
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#define IGN_ROUTES 1
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#define IGN_DNS 2
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#define MAX_SERVERS 16 /* max servers that can be ignored per if */
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#define IMSG_DATA_SIZE(imsg) ((imsg).hdr.len - IMSG_HEADER_SIZE)
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#define DHCP_SNAME_LEN 64
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#define DHCP_FILE_LEN 128
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struct dhcp_hdr {
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uint8_t op; /* Message opcode/type */
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uint8_t htype; /* Hardware addr type (see net/if_types.h) */
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uint8_t hlen; /* Hardware addr length */
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uint8_t hops; /* Number of relay agent hops from client */
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uint32_t xid; /* Transaction ID */
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uint16_t secs; /* Seconds since client started looking */
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uint16_t flags; /* Flag bits */
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struct in_addr ciaddr; /* Client IP address (if already in use) */
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struct in_addr yiaddr; /* Client IP address */
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struct in_addr siaddr; /* IP address of next server to talk to */
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struct in_addr giaddr; /* DHCP relay agent IP address */
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uint8_t chaddr[16]; /* Client hardware address */
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char sname[DHCP_SNAME_LEN]; /* Server name */
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char file[DHCP_FILE_LEN]; /* Boot filename */
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};
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struct imsgev {
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struct imsgbuf ibuf;
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void (*handler)(int, short, void *);
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struct event ev;
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short events;
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};
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struct dhcp_route {
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struct in_addr dst;
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struct in_addr mask;
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struct in_addr gw;
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};
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enum imsg_type {
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IMSG_NONE,
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#ifndef SMALL
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IMSG_CTL_LOG_VERBOSE,
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IMSG_CTL_SHOW_INTERFACE_INFO,
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IMSG_CTL_SEND_REQUEST,
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IMSG_CTL_RELOAD,
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IMSG_CTL_END,
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IMSG_RECONF_CONF,
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IMSG_RECONF_IFACE,
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IMSG_RECONF_VC_ID,
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IMSG_RECONF_C_ID,
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IMSG_RECONF_H_NAME,
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IMSG_RECONF_END,
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#endif /* SMALL */
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IMSG_SEND_DISCOVER,
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IMSG_SEND_REQUEST,
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IMSG_SOCKET_IPC,
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IMSG_OPEN_BPFSOCK,
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IMSG_BPFSOCK,
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IMSG_UDPSOCK,
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IMSG_CLOSE_UDPSOCK,
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IMSG_ROUTESOCK,
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IMSG_CONTROLFD,
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IMSG_STARTUP,
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IMSG_UPDATE_IF,
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IMSG_REMOVE_IF,
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IMSG_DHCP,
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IMSG_CONFIGURE_INTERFACE,
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IMSG_DECONFIGURE_INTERFACE,
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IMSG_PROPOSE_RDNS,
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IMSG_WITHDRAW_RDNS,
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IMSG_WITHDRAW_ROUTES,
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IMSG_REPROPOSE_RDNS,
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IMSG_REQUEST_REBOOT,
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};
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#ifndef SMALL
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struct ctl_engine_info {
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uint32_t if_index;
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int running;
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int link_state;
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char state[sizeof("IF_INIT_REBOOT")];
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struct timespec request_time;
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struct in_addr server_identifier;
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struct in_addr dhcp_server; /* for unicast */
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struct in_addr requested_ip;
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struct in_addr mask;
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struct dhcp_route routes[MAX_DHCP_ROUTES];
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int routes_len;
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struct in_addr nameservers[MAX_RDNS_COUNT];
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uint32_t lease_time;
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uint32_t renewal_time;
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uint32_t rebinding_time;
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};
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struct iface_conf {
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SIMPLEQ_ENTRY(iface_conf) entry;
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char name[IF_NAMESIZE];
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uint8_t *vc_id;
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int vc_id_len;
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uint8_t *c_id;
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int c_id_len;
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char *h_name;
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int ignore;
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struct in_addr ignore_servers[MAX_SERVERS];
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int ignore_servers_len;
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int prefer_ipv6;
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};
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struct dhcpleased_conf {
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SIMPLEQ_HEAD(iface_conf_head, iface_conf) iface_list;
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};
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#endif /* SMALL */
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struct imsg_ifinfo {
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uint32_t if_index;
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int rdomain;
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int running;
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int link_state;
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struct ether_addr hw_address;
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char lease[LEASE_SIZE];
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};
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struct imsg_propose_rdns {
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uint32_t if_index;
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int rdomain;
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int rdns_count;
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struct in_addr rdns[MAX_RDNS_COUNT];
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};
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struct imsg_dhcp {
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uint32_t if_index;
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ssize_t len;
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uint16_t csumflags;
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uint8_t packet[1500];
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};
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struct imsg_req_dhcp {
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uint32_t if_index;
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uint32_t xid;
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struct in_addr ciaddr;
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struct in_addr requested_ip;
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struct in_addr server_identifier;
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struct in_addr dhcp_server;
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};
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/* dhcpleased.c */
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void imsg_event_add(struct imsgev *);
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int imsg_compose_event(struct imsgev *, uint16_t, uint32_t,
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pid_t, int, void *, uint16_t);
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#ifndef SMALL
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void config_clear(struct dhcpleased_conf *);
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struct dhcpleased_conf *config_new_empty(void);
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void merge_config(struct dhcpleased_conf *, struct
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dhcpleased_conf *);
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const char *sin_to_str(struct sockaddr_in *);
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/* frontend.c */
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struct iface_conf *find_iface_conf(struct iface_conf_head *, char *);
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int *changed_ifaces(struct dhcpleased_conf *, struct
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dhcpleased_conf *);
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/* printconf.c */
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void print_config(struct dhcpleased_conf *);
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/* parse.y */
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struct dhcpleased_conf *parse_config(const char *);
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int cmdline_symset(char *);
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#else
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#define sin_to_str(x...) ""
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#endif /* SMALL */
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