mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-24 11:45:27 +01:00
307 lines
8.0 KiB
C
307 lines
8.0 KiB
C
/** @file
|
|
|
|
Copyright (c) 2005 - 2017, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include "Ip4Impl.h"
|
|
|
|
|
|
/**
|
|
Return the cast type (Unicast/Boradcast) specific to an
|
|
interface. All the addresses are host byte ordered.
|
|
|
|
@param[in] IpAddr The IP address to classify in host byte order
|
|
@param[in] IpIf The interface that IpAddr received from
|
|
|
|
@return The cast type of this IP address specific to the interface.
|
|
@retval IP4_LOCAL_HOST The IpAddr equals to the interface's address
|
|
@retval IP4_SUBNET_BROADCAST The IpAddr is a directed subnet boradcast to the
|
|
interface
|
|
@retval IP4_NET_BROADCAST The IpAddr is a network broadcast to the interface
|
|
@retval 0 Otherwise.
|
|
|
|
**/
|
|
INTN
|
|
Ip4GetNetCast (
|
|
IN IP4_ADDR IpAddr,
|
|
IN IP4_INTERFACE *IpIf
|
|
)
|
|
{
|
|
if (IpAddr == IpIf->Ip) {
|
|
return IP4_LOCAL_HOST;
|
|
|
|
} else if (IpAddr == IpIf->SubnetBrdcast) {
|
|
return IP4_SUBNET_BROADCAST;
|
|
|
|
} else if (IpAddr == IpIf->NetBrdcast) {
|
|
return IP4_NET_BROADCAST;
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
Find the cast type of the packet related to the local host.
|
|
This isn't the same as link layer cast type. For example, DHCP
|
|
server may send local broadcast to the local unicast MAC.
|
|
|
|
@param[in] IpSb The IP4 service binding instance that received the
|
|
packet
|
|
@param[in] Dst The destination address in the packet (host byte
|
|
order)
|
|
@param[in] Src The source address in the packet (host byte order)
|
|
|
|
@return The cast type for the Dst, it will return on the first non-promiscuous
|
|
cast type to a configured interface. If the packet doesn't match any of
|
|
the interface, multicast address and local broadcast address are checked.
|
|
|
|
**/
|
|
INTN
|
|
Ip4GetHostCast (
|
|
IN IP4_SERVICE *IpSb,
|
|
IN IP4_ADDR Dst,
|
|
IN IP4_ADDR Src
|
|
)
|
|
{
|
|
LIST_ENTRY *Entry;
|
|
IP4_INTERFACE *IpIf;
|
|
INTN Type;
|
|
INTN Class;
|
|
|
|
Type = 0;
|
|
|
|
if (IpSb->MnpConfigData.EnablePromiscuousReceive) {
|
|
Type = IP4_PROMISCUOUS;
|
|
}
|
|
|
|
//
|
|
// Go through the interface list of the IP service, most likely.
|
|
//
|
|
NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {
|
|
IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);
|
|
|
|
//
|
|
// Skip the unconfigured interface and invalid source address:
|
|
// source address can't be broadcast.
|
|
//
|
|
if (!IpIf->Configured || IP4_IS_BROADCAST (Ip4GetNetCast (Src, IpIf))) {
|
|
continue;
|
|
}
|
|
|
|
if ((Class = Ip4GetNetCast (Dst, IpIf)) > Type) {
|
|
return Class;
|
|
}
|
|
}
|
|
|
|
//
|
|
// If it is local broadcast address. The source address must
|
|
// be a unicast address on one of the direct connected network.
|
|
// If it is a multicast address, accept it only if we are in
|
|
// the group.
|
|
//
|
|
if (Dst == IP4_ALLONE_ADDRESS) {
|
|
IpIf = Ip4FindNet (IpSb, Src);
|
|
|
|
if (IpIf != NULL && !IP4_IS_BROADCAST (Ip4GetNetCast (Src, IpIf))) {
|
|
return IP4_LOCAL_BROADCAST;
|
|
}
|
|
|
|
} else if (IP4_IS_MULTICAST (Dst) && Ip4FindGroup (&IpSb->IgmpCtrl, Dst) != NULL) {
|
|
return IP4_MULTICAST;
|
|
}
|
|
|
|
return Type;
|
|
}
|
|
|
|
|
|
/**
|
|
Find an interface whose configured IP address is Ip.
|
|
|
|
@param[in] IpSb The IP4 service binding instance
|
|
@param[in] Ip The Ip address (host byte order) to find
|
|
|
|
@return The IP4_INTERFACE point if found, otherwise NULL
|
|
|
|
**/
|
|
IP4_INTERFACE *
|
|
Ip4FindInterface (
|
|
IN IP4_SERVICE *IpSb,
|
|
IN IP4_ADDR Ip
|
|
)
|
|
{
|
|
LIST_ENTRY *Entry;
|
|
IP4_INTERFACE *IpIf;
|
|
|
|
NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {
|
|
IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);
|
|
|
|
if (IpIf->Configured && (IpIf->Ip == Ip)) {
|
|
return IpIf;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
Find an interface that Ip is on that connected network.
|
|
|
|
@param[in] IpSb The IP4 service binding instance
|
|
@param[in] Ip The Ip address (host byte order) to find
|
|
|
|
@return The IP4_INTERFACE point if found, otherwise NULL
|
|
|
|
**/
|
|
IP4_INTERFACE *
|
|
Ip4FindNet (
|
|
IN IP4_SERVICE *IpSb,
|
|
IN IP4_ADDR Ip
|
|
)
|
|
{
|
|
LIST_ENTRY *Entry;
|
|
IP4_INTERFACE *IpIf;
|
|
|
|
NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {
|
|
IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);
|
|
|
|
if (IpIf->Configured && IP4_NET_EQUAL (Ip, IpIf->Ip, IpIf->SubnetMask)) {
|
|
return IpIf;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
Find an interface of the service with the same Ip/Netmask pair.
|
|
|
|
@param[in] IpSb Ip4 service binding instance
|
|
@param[in] Ip The Ip adress to find (host byte order)
|
|
@param[in] Netmask The network to find (host byte order)
|
|
|
|
@return The IP4_INTERFACE point if found, otherwise NULL
|
|
|
|
**/
|
|
IP4_INTERFACE *
|
|
Ip4FindStationAddress (
|
|
IN IP4_SERVICE *IpSb,
|
|
IN IP4_ADDR Ip,
|
|
IN IP4_ADDR Netmask
|
|
)
|
|
{
|
|
LIST_ENTRY *Entry;
|
|
IP4_INTERFACE *IpIf;
|
|
|
|
NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {
|
|
IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);
|
|
|
|
if (IpIf->Configured && (IpIf->Ip == Ip) && (IpIf->SubnetMask == Netmask)) {
|
|
return IpIf;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
Get the MAC address for a multicast IP address. Call
|
|
Mnp's McastIpToMac to find the MAC address in stead of
|
|
hard code the NIC to be Ethernet.
|
|
|
|
@param[in] Mnp The Mnp instance to get the MAC address.
|
|
@param[in] Multicast The multicast IP address to translate.
|
|
@param[out] Mac The buffer to hold the translated address.
|
|
|
|
@retval EFI_SUCCESS if the multicast IP is successfully translated to a
|
|
multicast MAC address.
|
|
@retval other Otherwise some error.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
Ip4GetMulticastMac (
|
|
IN EFI_MANAGED_NETWORK_PROTOCOL *Mnp,
|
|
IN IP4_ADDR Multicast,
|
|
OUT EFI_MAC_ADDRESS *Mac
|
|
)
|
|
{
|
|
EFI_IP_ADDRESS EfiIp;
|
|
|
|
EFI_IP4 (EfiIp.v4) = HTONL (Multicast);
|
|
return Mnp->McastIpToMac (Mnp, FALSE, &EfiIp, Mac);
|
|
}
|
|
|
|
|
|
/**
|
|
Convert the multibyte field in IP header's byter order.
|
|
In spite of its name, it can also be used to convert from
|
|
host to network byte order.
|
|
|
|
@param[in] Head The IP head to convert
|
|
|
|
@return Point to the converted IP head
|
|
|
|
**/
|
|
IP4_HEAD *
|
|
Ip4NtohHead (
|
|
IN IP4_HEAD *Head
|
|
)
|
|
{
|
|
Head->TotalLen = NTOHS (Head->TotalLen);
|
|
Head->Id = NTOHS (Head->Id);
|
|
Head->Fragment = NTOHS (Head->Fragment);
|
|
Head->Src = NTOHL (Head->Src);
|
|
Head->Dst = NTOHL (Head->Dst);
|
|
|
|
return Head;
|
|
}
|
|
|
|
|
|
/**
|
|
Validate that Ip/Netmask pair is OK to be used as station
|
|
address. Only continuous netmasks are supported. and check
|
|
that StationAddress is a unicast address on the newtwork.
|
|
|
|
@param[in] Ip The IP address to validate.
|
|
@param[in] Netmask The netmaks of the IP.
|
|
|
|
@retval TRUE The Ip/Netmask pair is valid.
|
|
@retval FALSE The Ip/Netmask pair is invalid.
|
|
|
|
**/
|
|
BOOLEAN
|
|
Ip4StationAddressValid (
|
|
IN IP4_ADDR Ip,
|
|
IN IP4_ADDR Netmask
|
|
)
|
|
{
|
|
//
|
|
// Only support the station address with 0.0.0.0/0 to enable DHCP client.
|
|
//
|
|
if (Netmask == IP4_ALLZERO_ADDRESS) {
|
|
return (BOOLEAN) (Ip == IP4_ALLZERO_ADDRESS);
|
|
}
|
|
|
|
//
|
|
// Only support the continuous net masks
|
|
//
|
|
if (NetGetMaskLength (Netmask) == (IP4_MASK_MAX + 1)) {
|
|
return FALSE;
|
|
}
|
|
|
|
//
|
|
// Station address can't be class D or class E address
|
|
//
|
|
if (NetGetIpClass (Ip) > IP4_ADDR_CLASSC) {
|
|
return FALSE;
|
|
}
|
|
|
|
return NetIp4IsUnicast (Ip, Netmask);
|
|
}
|