diff options
Diffstat (limited to 'qemu/roms/ipxe/src/include/ipxe/dhcp.h')
| -rw-r--r-- | qemu/roms/ipxe/src/include/ipxe/dhcp.h | 676 |
1 files changed, 676 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/include/ipxe/dhcp.h b/qemu/roms/ipxe/src/include/ipxe/dhcp.h new file mode 100644 index 000000000..bcfb85cc1 --- /dev/null +++ b/qemu/roms/ipxe/src/include/ipxe/dhcp.h @@ -0,0 +1,676 @@ +#ifndef _IPXE_DHCP_H +#define _IPXE_DHCP_H + +/** @file + * + * Dynamic Host Configuration Protocol + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <stdint.h> +#include <stdarg.h> +#include <ipxe/in.h> +#include <ipxe/list.h> +#include <ipxe/refcnt.h> +#include <ipxe/tables.h> +#include <ipxe/uuid.h> +#include <ipxe/netdevice.h> +#include <ipxe/uaccess.h> + +struct interface; +struct dhcp_options; +struct dhcp_packet; + +/** BOOTP/DHCP server port */ +#define BOOTPS_PORT 67 + +/** BOOTP/DHCP client port */ +#define BOOTPC_PORT 68 + +/** PXE server port */ +#define PXE_PORT 4011 + +/** Construct a tag value for an encapsulated option + * + * This tag value can be passed to Etherboot functions when searching + * for DHCP options in order to search for a tag within an + * encapsulated options block. + */ +#define DHCP_ENCAP_OPT( encapsulator, encapsulated ) \ + ( ( (encapsulator) << 8 ) | (encapsulated) ) +/** Extract encapsulating option block tag from encapsulated tag value */ +#define DHCP_ENCAPSULATOR( encap_opt ) ( (encap_opt) >> 8 ) +/** Extract encapsulated option tag from encapsulated tag value */ +#define DHCP_ENCAPSULATED( encap_opt ) ( (encap_opt) & 0xff ) +/** Option is encapsulated */ +#define DHCP_IS_ENCAP_OPT( opt ) DHCP_ENCAPSULATOR( opt ) + +/** + * @defgroup dhcpopts DHCP option tags + * @{ + */ + +/** Padding + * + * This tag does not have a length field; it is always only a single + * byte in length. + */ +#define DHCP_PAD 0 + +/** Minimum normal DHCP option */ +#define DHCP_MIN_OPTION 1 + +/** Subnet mask */ +#define DHCP_SUBNET_MASK 1 + +/** Routers */ +#define DHCP_ROUTERS 3 + +/** DNS servers */ +#define DHCP_DNS_SERVERS 6 + +/** Syslog servers */ +#define DHCP_LOG_SERVERS 7 + +/** Host name */ +#define DHCP_HOST_NAME 12 + +/** Domain name */ +#define DHCP_DOMAIN_NAME 15 + +/** Root path */ +#define DHCP_ROOT_PATH 17 + +/** Vendor encapsulated options */ +#define DHCP_VENDOR_ENCAP 43 + +/** PXE boot server discovery control */ +#define DHCP_PXE_DISCOVERY_CONTROL DHCP_ENCAP_OPT ( DHCP_VENDOR_ENCAP, 6 ) + +/** PXE boot server discovery control bits */ +enum dhcp_pxe_discovery_control { + /** Inhibit broadcast discovery */ + PXEBS_NO_BROADCAST = 1, + /** Inhibit multicast discovery */ + PXEBS_NO_MULTICAST = 2, + /** Accept only servers in DHCP_PXE_BOOT_SERVERS list */ + PXEBS_NO_UNKNOWN_SERVERS = 4, + /** Skip discovery if filename present */ + PXEBS_SKIP = 8, +}; + +/** PXE boot server multicast address */ +#define DHCP_PXE_BOOT_SERVER_MCAST DHCP_ENCAP_OPT ( DHCP_VENDOR_ENCAP, 7 ) + +/** PXE boot servers */ +#define DHCP_PXE_BOOT_SERVERS DHCP_ENCAP_OPT ( DHCP_VENDOR_ENCAP, 8 ) + +/** PXE boot server */ +struct dhcp_pxe_boot_server { + /** "Type" */ + uint16_t type; + /** Number of IPv4 addresses */ + uint8_t num_ip; + /** IPv4 addresses */ + struct in_addr ip[0]; +} __attribute__ (( packed )); + +/** PXE boot menu */ +#define DHCP_PXE_BOOT_MENU DHCP_ENCAP_OPT ( DHCP_VENDOR_ENCAP, 9 ) + +/** PXE boot menu */ +struct dhcp_pxe_boot_menu { + /** "Type" */ + uint16_t type; + /** Description length */ + uint8_t desc_len; + /** Description */ + char desc[0]; +} __attribute__ (( packed )); + +/** PXE boot menu prompt */ +#define DHCP_PXE_BOOT_MENU_PROMPT DHCP_ENCAP_OPT ( DHCP_VENDOR_ENCAP, 10 ) + +/** PXE boot menu prompt */ +struct dhcp_pxe_boot_menu_prompt { + /** Timeout + * + * A value of 0 means "time out immediately and select first + * boot item, without displaying the prompt". A value of 255 + * means "display menu immediately with no timeout". Any + * other value means "display prompt, wait this many seconds + * for keypress, if key is F8, display menu, otherwise select + * first boot item". + */ + uint8_t timeout; + /** Prompt to press F8 */ + char prompt[0]; +} __attribute__ (( packed )); + +/** PXE boot menu item */ +#define DHCP_PXE_BOOT_MENU_ITEM DHCP_ENCAP_OPT ( DHCP_VENDOR_ENCAP, 71 ) + +/** PXE boot menu item */ +struct dhcp_pxe_boot_menu_item { + /** "Type" + * + * This field actually identifies the specific boot server (or + * cluster of boot servers offering identical boot files). + */ + uint16_t type; + /** "Layer" + * + * Just don't ask. + */ + uint16_t layer; +} __attribute__ (( packed )); + +/** Requested IP address */ +#define DHCP_REQUESTED_ADDRESS 50 + +/** Lease time */ +#define DHCP_LEASE_TIME 51 + +/** Option overloading + * + * The value of this option is the bitwise-OR of zero or more + * DHCP_OPTION_OVERLOAD_XXX constants. + */ +#define DHCP_OPTION_OVERLOAD 52 + +/** The "file" field is overloaded to contain extra DHCP options */ +#define DHCP_OPTION_OVERLOAD_FILE 1 + +/** The "sname" field is overloaded to contain extra DHCP options */ +#define DHCP_OPTION_OVERLOAD_SNAME 2 + +/** DHCP message type */ +#define DHCP_MESSAGE_TYPE 53 +#define DHCPNONE 0 +#define DHCPDISCOVER 1 +#define DHCPOFFER 2 +#define DHCPREQUEST 3 +#define DHCPDECLINE 4 +#define DHCPACK 5 +#define DHCPNAK 6 +#define DHCPRELEASE 7 +#define DHCPINFORM 8 + +/** DHCP server identifier */ +#define DHCP_SERVER_IDENTIFIER 54 + +/** Parameter request list */ +#define DHCP_PARAMETER_REQUEST_LIST 55 + +/** Maximum DHCP message size */ +#define DHCP_MAX_MESSAGE_SIZE 57 + +/** Vendor class identifier */ +#define DHCP_VENDOR_CLASS_ID 60 + +/** Client identifier */ +#define DHCP_CLIENT_ID 61 + +/** Client identifier */ +struct dhcp_client_id { + /** Link-layer protocol */ + uint8_t ll_proto; + /** Link-layer address */ + uint8_t ll_addr[MAX_LL_ADDR_LEN]; +} __attribute__ (( packed )); + +/** TFTP server name + * + * This option replaces the fixed "sname" field, when that field is + * used to contain overloaded options. + */ +#define DHCP_TFTP_SERVER_NAME 66 + +/** Bootfile name + * + * This option replaces the fixed "file" field, when that field is + * used to contain overloaded options. + */ +#define DHCP_BOOTFILE_NAME 67 + +/** User class identifier */ +#define DHCP_USER_CLASS_ID 77 + +/** Client system architecture */ +#define DHCP_CLIENT_ARCHITECTURE 93 + +/** DHCP client architecture */ +struct dhcp_client_architecture { + uint16_t arch; +} __attribute__ (( packed )); + +/** DHCP client architecture values + * + * These are defined by the PXE specification and redefined by + * RFC4578. + */ +enum dhcp_client_architecture_values { + /** Intel x86 PC */ + DHCP_CLIENT_ARCHITECTURE_X86 = 0x0000, + /** NEC/PC98 */ + DHCP_CLIENT_ARCHITECTURE_PC98 = 0x0001, + /** EFI Itanium */ + DHCP_CLIENT_ARCHITECTURE_IA64 = 0x0002, + /** DEC Alpha */ + DHCP_CLIENT_ARCHITECTURE_ALPHA = 0x0003, + /** Arc x86 */ + DHCP_CLIENT_ARCHITECTURE_ARCX86 = 0x0004, + /** Intel Lean Client */ + DHCP_CLIENT_ARCHITECTURE_LC = 0x0005, + /** EFI IA32 */ + DHCP_CLIENT_ARCHITECTURE_IA32 = 0x0006, + /** EFI BC */ + DHCP_CLIENT_ARCHITECTURE_EFI = 0x0007, + /** EFI Xscale */ + DHCP_CLIENT_ARCHITECTURE_XSCALE = 0x0008, + /** EFI x86-64 */ + DHCP_CLIENT_ARCHITECTURE_X86_64 = 0x0009, +}; + +/** Client network device interface */ +#define DHCP_CLIENT_NDI 94 + +/** UUID client identifier */ +#define DHCP_CLIENT_UUID 97 + +/** UUID client identifier */ +struct dhcp_client_uuid { + /** Identifier type */ + uint8_t type; + /** UUID */ + union uuid uuid; +} __attribute__ (( packed )); + +#define DHCP_CLIENT_UUID_TYPE 0 + +/** DNS domain search list */ +#define DHCP_DOMAIN_SEARCH 119 + +/** Etherboot-specific encapsulated options + * + * This encapsulated options field is used to contain all options + * specific to Etherboot (i.e. not assigned by IANA or other standards + * bodies). + */ +#define DHCP_EB_ENCAP 175 + +/** Priority of this options block + * + * This is a signed 8-bit integer field indicating the priority of + * this block of options. It can be used to specify the relative + * priority of multiple option blocks (e.g. options from non-volatile + * storage versus options from a DHCP server). + */ +#define DHCP_EB_PRIORITY DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x01 ) + +/** "Your" IP address + * + * This option is used internally to contain the value of the "yiaddr" + * field, in order to provide a consistent approach to storing and + * processing options. It should never be present in a DHCP packet. + */ +#define DHCP_EB_YIADDR DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x02 ) + +/** "Server" IP address + * + * This option is used internally to contain the value of the "siaddr" + * field, in order to provide a consistent approach to storing and + * processing options. It should never be present in a DHCP packet. + */ +#define DHCP_EB_SIADDR DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x03 ) + +/** Keep SAN drive registered + * + * If set to a non-zero value, iPXE will not detach any SAN drive + * after failing to boot from it. (This option is required in order + * to perform an installation direct to an iSCSI target.) + */ +#define DHCP_EB_KEEP_SAN DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x08 ) + +/** Skip booting from SAN drive + * + * If set to a non-zero value, iPXE will skip booting from any SAN + * drive. (This option is sometimes required in conjunction with @c + * DHCP_EB_KEEP_SAN in order to perform an installation direct to an + * iSCSI target.) + */ +#define DHCP_EB_SKIP_SAN_BOOT DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x09 ) + +/* + * Tags in the range 0x10-0x4f are reserved for feature markers + * + */ + +/** Scriptlet + * + * If a scriptlet exists, it will be executed in place of the usual + * call to autoboot() + */ +#define DHCP_EB_SCRIPTLET DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x51 ) + +/** Encrypted syslog server */ +#define DHCP_EB_SYSLOGS_SERVER DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x55 ) + +/** Trusted root certficate fingerprints */ +#define DHCP_EB_TRUST DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x5a ) + +/** Client certficate */ +#define DHCP_EB_CERT DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x5b ) + +/** Client private key */ +#define DHCP_EB_KEY DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x5c ) + +/** Cross-signed certificate source */ +#define DHCP_EB_CROSS_CERT DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x5d ) + +/** Skip PXE DHCP protocol extensions such as ProxyDHCP + * + * If set to a non-zero value, iPXE will not wait for ProxyDHCP offers + * and will ignore any PXE-specific DHCP options that it receives. + */ +#define DHCP_EB_NO_PXEDHCP DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xb0 ) + +/** Network device descriptor + * + * Byte 0 is the bus type ID; remaining bytes depend on the bus type. + * + * PCI devices: + * Byte 0 : 1 (PCI) + * Byte 1 : PCI vendor ID MSB + * Byte 2 : PCI vendor ID LSB + * Byte 3 : PCI device ID MSB + * Byte 4 : PCI device ID LSB + */ +#define DHCP_EB_BUS_ID DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xb1 ) + +/** Network device descriptor */ +struct dhcp_netdev_desc { + /** Bus type ID */ + uint8_t type; + /** Vendor ID */ + uint16_t vendor; + /** Device ID */ + uint16_t device; +} __attribute__ (( packed )); + +/** Use cached network settings (obsolete; do not reuse this value) */ +#define DHCP_EB_USE_CACHED DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xb2 ) + +/** BIOS drive number + * + * This is the drive number for a drive emulated via INT 13. 0x80 is + * the first hard disk, 0x81 is the second hard disk, etc. + */ +#define DHCP_EB_BIOS_DRIVE DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xbd ) + +/** Username + * + * This will be used as the username for any required authentication. + * It is expected that this option's value will be held in + * non-volatile storage, rather than transmitted as part of a DHCP + * packet. + */ +#define DHCP_EB_USERNAME DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xbe ) + +/** Password + * + * This will be used as the password for any required authentication. + * It is expected that this option's value will be held in + * non-volatile storage, rather than transmitted as part of a DHCP + * packet. + */ +#define DHCP_EB_PASSWORD DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xbf ) + +/** Reverse username + * + * This will be used as the reverse username (i.e. the username + * provided by the server) for any required authentication. It is + * expected that this option's value will be held in non-volatile + * storage, rather than transmitted as part of a DHCP packet. + */ +#define DHCP_EB_REVERSE_USERNAME DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xc0 ) + +/** Reverse password + * + * This will be used as the reverse password (i.e. the password + * provided by the server) for any required authentication. It is + * expected that this option's value will be held in non-volatile + * storage, rather than transmitted as part of a DHCP packet. + */ +#define DHCP_EB_REVERSE_PASSWORD DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xc1 ) + +/** User ID + * + * This will be used as the user id for AUTH_SYS based authentication in NFS. + */ +#define DHCP_EB_UID DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xc2 ) + +/** Group ID + * + * This will be used as the group id for AUTH_SYS based authentication in NFS. + */ +#define DHCP_EB_GID DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xc3 ) + +/** iPXE version number */ +#define DHCP_EB_VERSION DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xeb ) + +/** iSCSI primary target IQN */ +#define DHCP_ISCSI_PRIMARY_TARGET_IQN 201 + +/** iSCSI secondary target IQN */ +#define DHCP_ISCSI_SECONDARY_TARGET_IQN 202 + +/** iSCSI initiator IQN */ +#define DHCP_ISCSI_INITIATOR_IQN 203 + +/** Maximum normal DHCP option */ +#define DHCP_MAX_OPTION 254 + +/** End of options + * + * This tag does not have a length field; it is always only a single + * byte in length. + */ +#define DHCP_END 255 + +/** @} */ + +/** Construct a DHCP option from a list of bytes */ +#define DHCP_OPTION( ... ) VA_ARG_COUNT ( __VA_ARGS__ ), __VA_ARGS__ + +/** Construct a DHCP option from a list of characters */ +#define DHCP_STRING( ... ) DHCP_OPTION ( __VA_ARGS__ ) + +/** Construct a byte-valued DHCP option */ +#define DHCP_BYTE( value ) DHCP_OPTION ( value ) + +/** Construct a word-valued DHCP option */ +#define DHCP_WORD( value ) DHCP_OPTION ( ( ( (value) >> 8 ) & 0xff ), \ + ( ( (value) >> 0 ) & 0xff ) ) + +/** Construct a dword-valued DHCP option */ +#define DHCP_DWORD( value ) DHCP_OPTION ( ( ( (value) >> 24 ) & 0xff ), \ + ( ( (value) >> 16 ) & 0xff ), \ + ( ( (value) >> 8 ) & 0xff ), \ + ( ( (value) >> 0 ) & 0xff ) ) + +/** Construct a DHCP encapsulated options field */ +#define DHCP_ENCAP( ... ) DHCP_OPTION ( __VA_ARGS__, DHCP_END ) + +/** + * A DHCP option + * + * DHCP options consist of a mandatory tag, a length field that is + * mandatory for all options except @c DHCP_PAD and @c DHCP_END, and a + * payload. + */ +struct dhcp_option { + /** Tag + * + * Must be a @c DHCP_XXX value. + */ + uint8_t tag; + /** Length + * + * This is the length of the data field (i.e. excluding the + * tag and length fields). For the two tags @c DHCP_PAD and + * @c DHCP_END, the length field is implicitly zero and is + * also missing, i.e. these DHCP options are only a single + * byte in length. + */ + uint8_t len; + /** Option data */ + uint8_t data[0]; +} __attribute__ (( packed )); + +/** + * Length of a DHCP option header + * + * The header is the portion excluding the data, i.e. the tag and the + * length. + */ +#define DHCP_OPTION_HEADER_LEN ( offsetof ( struct dhcp_option, data ) ) + +/** Maximum length for a single DHCP option */ +#define DHCP_MAX_LEN 0xff + +/** + * A DHCP header + * + */ +struct dhcphdr { + /** Operation + * + * This must be either @c BOOTP_REQUEST or @c BOOTP_REPLY. + */ + uint8_t op; + /** Hardware address type + * + * This is an ARPHRD_XXX constant. Note that ARPHRD_XXX + * constants are nominally 16 bits wide; this could be + * considered to be a bug in the BOOTP/DHCP specification. + */ + uint8_t htype; + /** Hardware address length */ + uint8_t hlen; + /** Number of hops from server */ + uint8_t hops; + /** Transaction ID */ + uint32_t xid; + /** Seconds since start of acquisition */ + uint16_t secs; + /** Flags */ + uint16_t flags; + /** "Client" IP address + * + * This is filled in if the client already has an IP address + * assigned and can respond to ARP requests. + */ + struct in_addr ciaddr; + /** "Your" IP address + * + * This is the IP address assigned by the server to the client. + */ + struct in_addr yiaddr; + /** "Server" IP address + * + * This is the IP address of the next server to be used in the + * boot process. + */ + struct in_addr siaddr; + /** "Gateway" IP address + * + * This is the IP address of the DHCP relay agent, if any. + */ + struct in_addr giaddr; + /** Client hardware address */ + uint8_t chaddr[16]; + /** Server host name (null terminated) + * + * This field may be overridden and contain DHCP options + */ + char sname[64]; + /** Boot file name (null terminated) + * + * This field may be overridden and contain DHCP options + */ + char file[128]; + /** DHCP magic cookie + * + * Must have the value @c DHCP_MAGIC_COOKIE. + */ + uint32_t magic; + /** DHCP options + * + * Variable length; extends to the end of the packet. Minimum + * length (for the sake of sanity) is 1, to allow for a single + * @c DHCP_END tag. + */ + uint8_t options[0]; +}; + +/** Opcode for a request from client to server */ +#define BOOTP_REQUEST 1 + +/** Opcode for a reply from server to client */ +#define BOOTP_REPLY 2 + +/** BOOTP reply must be broadcast + * + * Clients that cannot accept unicast BOOTP replies must set this + * flag. + */ +#define BOOTP_FL_BROADCAST 0x8000 + +/** DHCP magic cookie */ +#define DHCP_MAGIC_COOKIE 0x63825363UL + +/** DHCP minimum packet length + * + * This is the mandated minimum packet length that a DHCP participant + * must be prepared to receive. + */ +#define DHCP_MIN_LEN 552 + +/** Timeouts for sending DHCP packets */ +#define DHCP_MIN_TIMEOUT ( 1 * TICKS_PER_SEC ) +#define DHCP_MAX_TIMEOUT ( 10 * TICKS_PER_SEC ) + +/** Maximum time that we will wait for ProxyDHCP responses */ +#define PROXYDHCP_MAX_TIMEOUT ( 2 * TICKS_PER_SEC ) + +/** Maximum time that we will wait for Boot Server responses */ +#define PXEBS_MAX_TIMEOUT ( 3 * TICKS_PER_SEC ) + +/** Settings block name used for DHCP responses */ +#define DHCP_SETTINGS_NAME "dhcp" + +/** Settings block name used for ProxyDHCP responses */ +#define PROXYDHCP_SETTINGS_NAME "proxydhcp" + +/** Setting block name used for BootServerDHCP responses */ +#define PXEBS_SETTINGS_NAME "pxebs" + +extern uint32_t dhcp_last_xid; +extern int dhcp_create_packet ( struct dhcp_packet *dhcppkt, + struct net_device *netdev, uint8_t msgtype, + uint32_t xid, const void *options, + size_t options_len, void *data, + size_t max_len ); +extern int dhcp_create_request ( struct dhcp_packet *dhcppkt, + struct net_device *netdev, + unsigned int msgtype, uint32_t xid, + struct in_addr ciaddr, + void *data, size_t max_len ); +extern int start_dhcp ( struct interface *job, struct net_device *netdev ); +extern int start_pxebs ( struct interface *job, struct net_device *netdev, + unsigned int pxe_type ); + +#endif /* _IPXE_DHCP_H */ |