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217 lines
6.5 KiB
C
217 lines
6.5 KiB
C
/** @file
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Common definition for IP4.
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Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __EFI_IP4_COMMON_H__
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#define __EFI_IP4_COMMON_H__
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typedef struct _IP4_INTERFACE IP4_INTERFACE;
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typedef struct _IP4_PROTOCOL IP4_PROTOCOL;
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typedef struct _IP4_SERVICE IP4_SERVICE;
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#define IP4_ETHER_PROTO 0x0800
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//
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// The packet is received as link level broadcast/multicast/promiscuous.
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//
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#define IP4_LINK_BROADCAST 0x00000001
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#define IP4_LINK_MULTICAST 0x00000002
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#define IP4_LINK_PROMISC 0x00000004
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//
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// IP4 address cast type classification. Keep it true that any
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// type bigger than or equal to LOCAL_BROADCAST is broadcast.
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//
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#define IP4_PROMISCUOUS 1
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#define IP4_LOCAL_HOST 2
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#define IP4_MULTICAST 3
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#define IP4_LOCAL_BROADCAST 4 // Destination is 255.255.255.255
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#define IP4_SUBNET_BROADCAST 5
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#define IP4_NET_BROADCAST 6
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//
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// IP4 header flags
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//
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#define IP4_HEAD_DF_MASK 0x4000
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#define IP4_HEAD_MF_MASK 0x2000
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#define IP4_HEAD_OFFSET_MASK 0x1fff
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#define IP4_ALLZERO_ADDRESS 0x00000000u
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#define IP4_ALLONE_ADDRESS 0xFFFFFFFFu
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#define IP4_ALLSYSTEM_ADDRESS 0xE0000001u
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#define IP4_ALLROUTER_ADDRESS 0xE0000002u
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///
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/// Compose the fragment field to be used in the IP4 header.
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///
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#define IP4_HEAD_FRAGMENT_FIELD(Df, Mf, Offset) \
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((UINT16)(((Df) ? IP4_HEAD_DF_MASK : 0) | ((Mf) ? IP4_HEAD_MF_MASK : 0) | (((Offset) >> 3) & IP4_HEAD_OFFSET_MASK)))
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#define IP4_LAST_FRAGMENT(FragmentField) \
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(((FragmentField) & IP4_HEAD_MF_MASK) == 0)
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#define IP4_FIRST_FRAGMENT(FragmentField) \
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((BOOLEAN)(((FragmentField) & IP4_HEAD_OFFSET_MASK) == 0))
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#define IP4_DO_NOT_FRAGMENT(FragmentField) \
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((BOOLEAN)(((FragmentField) & IP4_HEAD_DF_MASK) == IP4_HEAD_DF_MASK))
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#define IP4_IS_BROADCAST(CastType) ((CastType) >= IP4_LOCAL_BROADCAST)
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///
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/// Convert the Microsecond to second. IP transmit/receive time is
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/// in the unit of microsecond. IP ticks once per second.
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///
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#define IP4_US_TO_SEC(Us) (((Us) + 999999) / 1000000)
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/**
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Return the cast type (Unicast/Broadcast) specific to an
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interface. All the addresses are host byte ordered.
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@param[in] IpAddr The IP address to classify in host byte order
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@param[in] IpIf The interface that IpAddr received from
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@return The cast type of this IP address specific to the interface.
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@retval IP4_LOCAL_HOST The IpAddr equals to the interface's address
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@retval IP4_SUBNET_BROADCAST The IpAddr is a directed subnet broadcast to the
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interface
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@retval IP4_NET_BROADCAST The IpAddr is a network broadcast to the interface
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@retval 0 Otherwise.
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**/
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INTN
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Ip4GetNetCast (
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IN IP4_ADDR IpAddr,
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IN IP4_INTERFACE *IpIf
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);
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/**
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Find the cast type of the packet related to the local host.
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This isn't the same as link layer cast type. For example, DHCP
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server may send local broadcast to the local unicast MAC.
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@param[in] IpSb The IP4 service binding instance that received the
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packet
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@param[in] Dst The destination address in the packet (host byte
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order)
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@param[in] Src The source address in the packet (host byte order)
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@return The cast type for the Dst, it will return on the first non-promiscuous
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cast type to a configured interface. If the packet doesn't match any of
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the interface, multicast address and local broadcast address are checked.
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**/
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INTN
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Ip4GetHostCast (
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IN IP4_SERVICE *IpSb,
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IN IP4_ADDR Dst,
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IN IP4_ADDR Src
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);
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/**
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Find an interface whose configured IP address is Ip.
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@param[in] IpSb The IP4 service binding instance
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@param[in] Ip The Ip address (host byte order) to find
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@return The IP4_INTERFACE point if found, otherwise NULL
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**/
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IP4_INTERFACE *
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Ip4FindInterface (
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IN IP4_SERVICE *IpSb,
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IN IP4_ADDR Ip
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);
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/**
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Find an interface that Ip is on that connected network.
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@param[in] IpSb The IP4 service binding instance
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@param[in] Ip The Ip address (host byte order) to find
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@return The IP4_INTERFACE point if found, otherwise NULL
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**/
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IP4_INTERFACE *
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Ip4FindNet (
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IN IP4_SERVICE *IpSb,
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IN IP4_ADDR Ip
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);
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/**
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Find an interface of the service with the same Ip/Netmask pair.
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@param[in] IpSb Ip4 service binding instance
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@param[in] Ip The Ip address to find (host byte order)
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@param[in] Netmask The network to find (host byte order)
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@return The IP4_INTERFACE point if found, otherwise NULL
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**/
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IP4_INTERFACE *
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Ip4FindStationAddress (
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IN IP4_SERVICE *IpSb,
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IN IP4_ADDR Ip,
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IN IP4_ADDR Netmask
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);
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/**
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Get the MAC address for a multicast IP address. Call
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Mnp's McastIpToMac to find the MAC address in stead of
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hard code the NIC to be Ethernet.
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@param[in] Mnp The Mnp instance to get the MAC address.
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@param[in] Multicast The multicast IP address to translate.
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@param[out] Mac The buffer to hold the translated address.
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@retval EFI_SUCCESS if the multicast IP is successfully translated to a
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multicast MAC address.
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@retval other Otherwise some error.
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**/
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EFI_STATUS
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Ip4GetMulticastMac (
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IN EFI_MANAGED_NETWORK_PROTOCOL *Mnp,
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IN IP4_ADDR Multicast,
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OUT EFI_MAC_ADDRESS *Mac
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);
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/**
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Convert the multibyte field in IP header's byter order.
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In spite of its name, it can also be used to convert from
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host to network byte order.
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@param[in] Head The IP head to convert
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@return Point to the converted IP head
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**/
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IP4_HEAD *
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Ip4NtohHead (
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IN IP4_HEAD *Head
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);
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/**
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Validate that Ip/Netmask pair is OK to be used as station
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address. Only continuous netmasks are supported. and check
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that StationAddress is a unicast address on the network.
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@param[in] Ip The IP address to validate.
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@param[in] Netmask The netmask of the IP.
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@retval TRUE The Ip/Netmask pair is valid.
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@retval FALSE The Ip/Netmask pair is invalid.
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**/
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BOOLEAN
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Ip4StationAddressValid (
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IN IP4_ADDR Ip,
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IN IP4_ADDR Netmask
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);
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#endif
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