mirror of https://github.com/acidanthera/audk.git
763 lines
18 KiB
C
763 lines
18 KiB
C
/*++
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Copyright (c) 2006 - 2007, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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PxeDhcp4InitSelect.c
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Abstract:
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--*/
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#include "PxeDhcp4.h"
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STATIC
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INTN
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offer_verify (
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IN PXE_DHCP4_PRIVATE_DATA *Private,
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IN DHCP4_PACKET *tx_pkt,
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IN DHCP4_PACKET *rx_pkt,
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IN UINTN rx_pkt_size
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)
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/*++
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-2 = ignore, stop waiting
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-1 = ignore, keep waiting
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0 = accept, keep waiting
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1 = accept, stop waiting
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--*/
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{
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EFI_STATUS EfiStatus;
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DHCP4_PACKET *tmp;
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DHCP4_OP *msg_type_op;
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DHCP4_OP *srvid_op;
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UINT32 magik;
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//
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// Verify parameters. Touch unused parameters to keep
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// compiler happy.
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//
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ASSERT (Private);
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ASSERT (rx_pkt);
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if (Private == NULL || rx_pkt == NULL) {
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return -2;
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}
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tx_pkt = tx_pkt;
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rx_pkt_size = rx_pkt_size;
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//
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// This may be a BOOTP Reply or DHCP Offer packet.
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// If there is no DHCP magik number, assume that
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// this is a BOOTP Reply packet.
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//
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magik = htonl (DHCP4_MAGIK_NUMBER);
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while (!CompareMem (&rx_pkt->dhcp4.magik, &magik, 4)) {
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//
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// If there is no DHCP message type option, assume
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// this is a BOOTP reply packet and cache it.
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//
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EfiStatus = find_opt (rx_pkt, DHCP4_MESSAGE_TYPE, 0, &msg_type_op);
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if (EFI_ERROR (EfiStatus)) {
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break;
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}
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//
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// If there is a DHCP message type option, it must be a
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// DHCP offer packet
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//
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if (msg_type_op->len != 1) {
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return -1;
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}
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if (msg_type_op->data[0] != DHCP4_MESSAGE_TYPE_OFFER) {
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return -1;
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}
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//
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// There must be a server identifier option.
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//
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EfiStatus = find_opt (
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rx_pkt,
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DHCP4_SERVER_IDENTIFIER,
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0,
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&srvid_op
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);
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if (EFI_ERROR (EfiStatus)) {
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return -1;
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}
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if (srvid_op->len != 4) {
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return -1;
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}
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//
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// Good DHCP offer packet.
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//
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break;
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}
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//
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// Good DHCP (or BOOTP) packet. Cache it!
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//
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tmp = AllocatePool ((Private->offers + 1) * sizeof (DHCP4_PACKET));
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if (tmp == NULL) {
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return -2;
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}
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ASSERT (tmp);
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if (Private->offers != 0) {
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CopyMem (
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tmp,
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Private->offer_list,
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Private->offers * sizeof (DHCP4_PACKET)
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);
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FreePool (Private->offer_list);
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}
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CopyMem (&tmp[Private->offers++], rx_pkt, sizeof (DHCP4_PACKET));
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Private->offer_list = tmp;
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return 0;
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}
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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STATIC
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INTN
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acknak_verify (
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IN PXE_DHCP4_PRIVATE_DATA *Private,
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IN DHCP4_PACKET *tx_pkt,
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IN DHCP4_PACKET *rx_pkt,
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IN UINTN rx_pkt_size
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)
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/*++
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-2 = ignore, stop waiting
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-1 = ignore, keep waiting
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0 = accept, keep waiting
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1 = accept, stop waiting
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--*/
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{
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EFI_STATUS EfiStatus;
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DHCP4_OP *msg_type_op;
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DHCP4_OP *srvid_op;
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DHCP4_OP *renew_op;
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DHCP4_OP *rebind_op;
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DHCP4_OP *lease_time_op;
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UINT32 magik;
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//
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// Verify parameters. Touch unused parameters to
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// keep compiler happy.
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//
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ASSERT (Private);
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ASSERT (rx_pkt);
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if (Private == NULL || rx_pkt == NULL) {
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return -2;
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}
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tx_pkt = tx_pkt;
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rx_pkt_size = rx_pkt_size;
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//
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// This must be a DHCP Ack message.
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//
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magik = htonl (DHCP4_MAGIK_NUMBER);
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if (CompareMem (&rx_pkt->dhcp4.magik, &magik, 4)) {
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return -1;
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}
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EfiStatus = find_opt (rx_pkt, DHCP4_MESSAGE_TYPE, 0, &msg_type_op);
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if (EFI_ERROR (EfiStatus)) {
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return -1;
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}
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if (msg_type_op->len != 1) {
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return -1;
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}
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if (msg_type_op->data[0] != DHCP4_MESSAGE_TYPE_ACK) {
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return -1;
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}
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//
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// There must be a server identifier.
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//
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EfiStatus = find_opt (rx_pkt, DHCP4_SERVER_IDENTIFIER, 0, &srvid_op);
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if (EFI_ERROR (EfiStatus)) {
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return -1;
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}
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if (srvid_op->len != 4) {
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return -1;
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}
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//
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// There should be a renewal time.
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// If there is not, we will default to the 7/8 of the rebinding time.
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//
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EfiStatus = find_opt (rx_pkt, DHCP4_RENEWAL_TIME, 0, &renew_op);
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if (EFI_ERROR (EfiStatus)) {
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renew_op = NULL;
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} else if (renew_op->len != 4) {
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renew_op = NULL;
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}
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//
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// There should be a rebinding time.
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// If there is not, we will default to 7/8 of the lease time.
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//
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EfiStatus = find_opt (rx_pkt, DHCP4_REBINDING_TIME, 0, &rebind_op);
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if (EFI_ERROR (EfiStatus)) {
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rebind_op = NULL;
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} else if (rebind_op->len != 4) {
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rebind_op = NULL;
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}
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//
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// There should be a lease time.
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// If there is not, we will default to one week.
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//
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EfiStatus = find_opt (rx_pkt, DHCP4_LEASE_TIME, 0, &lease_time_op);
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if (EFI_ERROR (EfiStatus)) {
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lease_time_op = NULL;
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} else if (lease_time_op->len != 4) {
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lease_time_op = NULL;
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}
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//
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// Packet looks good. Double check the renew, rebind and lease times.
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//
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CopyMem (&Private->ServerIp, srvid_op->data, 4);
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if (renew_op != NULL) {
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CopyMem (&Private->RenewTime, renew_op->data, 4);
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Private->RenewTime = htonl (Private->RenewTime);
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} else {
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Private->RenewTime = 0;
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}
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if (rebind_op != NULL) {
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CopyMem (&Private->RebindTime, rebind_op->data, 4);
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Private->RebindTime = htonl (Private->RebindTime);
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} else {
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Private->RebindTime = 0;
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}
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if (lease_time_op != NULL) {
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CopyMem (&Private->LeaseTime, lease_time_op->data, 4);
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Private->LeaseTime = htonl (Private->LeaseTime);
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} else {
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Private->LeaseTime = 0;
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}
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if (Private->LeaseTime < 60) {
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Private->LeaseTime = 7 * 86400;
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}
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if (Private->RebindTime < 52 || Private->RebindTime >= Private->LeaseTime) {
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Private->RebindTime = Private->LeaseTime / 2 + Private->LeaseTime / 4 + Private->LeaseTime / 8;
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}
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if (Private->RenewTime < 45 || Private->RenewTime >= Private->RebindTime) {
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Private->RenewTime = Private->RebindTime / 2 + Private->RebindTime / 4 + Private->RebindTime / 8;
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}
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return 1;
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}
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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EFI_STATUS
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EFIAPI
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PxeDhcp4Init (
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IN EFI_PXE_DHCP4_PROTOCOL *This,
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IN UINTN seconds_timeout,
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OUT UINTN *Offers,
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OUT DHCP4_PACKET **OfferList
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)
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{
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PXE_DHCP4_PRIVATE_DATA *Private;
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DHCP4_PACKET offer;
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EFI_IP_ADDRESS bcast_ip;
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EFI_STATUS EfiStatus;
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//
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// Verify parameters and protocol state.
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//
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if (This == NULL ||
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seconds_timeout < DHCP4_MIN_SECONDS ||
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seconds_timeout > DHCP4_MAX_SECONDS ||
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Offers == NULL ||
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OfferList == NULL
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) {
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//
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// Return parameters are not initialized when
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// parameters are invalid!
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//
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return EFI_INVALID_PARAMETER;
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}
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*Offers = 0;
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*OfferList = NULL;
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//
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// Check protocol state.
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//
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if (This->Data == NULL) {
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return EFI_NOT_STARTED;
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}
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if (!This->Data->SetupCompleted) {
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return EFI_NOT_READY;
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}
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//
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// Get pointer to our instance data.
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//
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Private = PXE_DHCP4_PRIVATE_DATA_FROM_THIS (This);
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if (Private == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (Private->PxeBc == NULL) {
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return EFI_DEVICE_ERROR;
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}
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//
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// Setup variables...
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//
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Private->offers = 0;
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Private->offer_list = NULL;
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EfiStatus = gBS->HandleProtocol (
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Private->Handle,
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&gEfiPxeDhcp4CallbackProtocolGuid,
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(VOID *) &Private->callback
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);
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if (EFI_ERROR (EfiStatus)) {
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Private->callback = NULL;
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}
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Private->function = EFI_PXE_DHCP4_FUNCTION_INIT;
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//
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// Increment the transaction ID.
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//
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{
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UINT32 xid;
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CopyMem (&xid, &This->Data->Discover.dhcp4.xid, sizeof (UINT32));
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xid = htonl (htonl (xid) + 1);
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CopyMem (&This->Data->Discover.dhcp4.xid, &xid, sizeof (UINT32));
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}
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//
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// Transmit discover and wait for offers...
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//
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SetMem (&bcast_ip, sizeof (EFI_IP_ADDRESS), 0xFF);
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EfiStatus = tx_rx_udp (
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Private,
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&bcast_ip,
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NULL,
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NULL,
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NULL,
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&This->Data->Discover,
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&offer,
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&offer_verify,
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seconds_timeout
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);
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if (EFI_ERROR (EfiStatus)) {
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if (Private->offer_list) {
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FreePool (Private->offer_list);
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}
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Private->offers = 0;
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Private->offer_list = NULL;
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Private->callback = NULL;
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DEBUG ((EFI_D_ERROR, "%r\n", EfiStatus));
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return EfiStatus;
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}
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*Offers = Private->offers;
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*OfferList = Private->offer_list;
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Private->offers = 0;
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Private->offer_list = NULL;
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Private->callback = NULL;
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This->Data->InitCompleted = TRUE;
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This->Data->SelectCompleted = FALSE;
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This->Data->IsBootp = FALSE;
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This->Data->IsAck = FALSE;
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return EFI_SUCCESS;
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}
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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EFI_STATUS
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EFIAPI
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PxeDhcp4Select (
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IN EFI_PXE_DHCP4_PROTOCOL *This,
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IN UINTN seconds_timeout,
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IN DHCP4_PACKET *Offer
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)
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{
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PXE_DHCP4_PRIVATE_DATA *Private;
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EFI_STATUS EfiStatus;
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DHCP4_PACKET request;
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DHCP4_PACKET acknak;
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EFI_IP_ADDRESS bcast_ip;
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EFI_IP_ADDRESS zero_ip;
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EFI_IP_ADDRESS local_ip;
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DHCP4_OP *srvid;
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DHCP4_OP *op;
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UINT32 dhcp4_magik;
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UINT8 buf[16];
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BOOLEAN is_bootp;
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//
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// Verify parameters.
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//
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if (This == NULL || seconds_timeout < DHCP4_MIN_SECONDS || seconds_timeout > DHCP4_MAX_SECONDS || Offer == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check protocol state.
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//
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if (This->Data == NULL) {
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return EFI_NOT_STARTED;
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}
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if (!This->Data->SetupCompleted) {
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return EFI_NOT_READY;
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}
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//
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// Get pointer to instance data.
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//
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Private = PXE_DHCP4_PRIVATE_DATA_FROM_THIS (This);
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if (Private == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (Private->PxeBc == NULL) {
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return EFI_DEVICE_ERROR;
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}
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//
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// Setup useful variables...
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//
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SetMem (&bcast_ip, sizeof (EFI_IP_ADDRESS), 0xFF);
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ZeroMem (&zero_ip, sizeof (EFI_IP_ADDRESS));
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ZeroMem (&local_ip, sizeof (EFI_IP_ADDRESS));
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local_ip.v4.Addr[0] = 127;
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local_ip.v4.Addr[3] = 1;
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This->Data->SelectCompleted = FALSE;
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This->Data->IsBootp = FALSE;
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This->Data->IsAck = FALSE;
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EfiStatus = gBS->HandleProtocol (
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Private->Handle,
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&gEfiPxeDhcp4CallbackProtocolGuid,
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(VOID *) &Private->callback
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);
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if (EFI_ERROR (EfiStatus)) {
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Private->callback = NULL;
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}
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Private->function = EFI_PXE_DHCP4_FUNCTION_SELECT;
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//
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// Verify offer packet fields.
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//
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if (Offer->dhcp4.op != BOOTP_REPLY) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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if (Offer->dhcp4.htype != This->Data->Discover.dhcp4.htype) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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if (Offer->dhcp4.hlen != This->Data->Discover.dhcp4.hlen) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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if (CompareMem (&Offer->dhcp4.xid, &This->Data->Discover.dhcp4.xid, 4)) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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if (!CompareMem (&Offer->dhcp4.yiaddr, &bcast_ip, 4)) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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if (!CompareMem (&Offer->dhcp4.yiaddr, &zero_ip, 4)) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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if (!CompareMem (&Offer->dhcp4.yiaddr, &local_ip, 4)) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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if (CompareMem (
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&Offer->dhcp4.chaddr,
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&This->Data->Discover.dhcp4.chaddr,
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16
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)) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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//
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// DHCP option checks
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//
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dhcp4_magik = htonl (DHCP4_MAGIK_NUMBER);
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is_bootp = TRUE;
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if (!CompareMem (&Offer->dhcp4.magik, &dhcp4_magik, 4)) {
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//
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// If present, DHCP message type must be offer.
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//
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EfiStatus = find_opt (Offer, DHCP4_MESSAGE_TYPE, 0, &op);
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if (!EFI_ERROR (EfiStatus)) {
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if (op->len != 1 || op->data[0] != DHCP4_MESSAGE_TYPE_OFFER) {
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Private->callback = NULL;
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return EFI_INVALID_PARAMETER;
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}
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is_bootp = FALSE;
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}
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//
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// If present, DHCP max message size must be valid.
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//
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EfiStatus = find_opt (Offer, DHCP4_MAX_MESSAGE_SIZE, 0, &op);
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if (!EFI_ERROR (EfiStatus)) {
|
|
if (op->len != 2 || ((op->data[0] << 8) | op->data[1]) < DHCP4_DEFAULT_MAX_MESSAGE_SIZE) {
|
|
Private->callback = NULL;
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
//
|
|
// If present, DHCP server identifier must be valid.
|
|
//
|
|
EfiStatus = find_opt (Offer, DHCP4_SERVER_IDENTIFIER, 0, &op);
|
|
|
|
if (!EFI_ERROR (EfiStatus)) {
|
|
if (op->len != 4 || !CompareMem (op->data, &bcast_ip, 4) || !CompareMem (op->data, &zero_ip, 4)) {
|
|
Private->callback = NULL;
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
//
|
|
// If present, DHCP subnet mask must be valid.
|
|
//
|
|
EfiStatus = find_opt (
|
|
Offer,
|
|
DHCP4_SUBNET_MASK,
|
|
0,
|
|
&op
|
|
);
|
|
|
|
if (!EFI_ERROR (EfiStatus)) {
|
|
if (op->len != 4) {
|
|
Private->callback = NULL;
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
}
|
|
//
|
|
// Early out for BOOTP.
|
|
//
|
|
This->Data->IsBootp = is_bootp;
|
|
if (is_bootp) {
|
|
//
|
|
// Copy offer packet to instance data.
|
|
//
|
|
CopyMem (&This->Data->Offer, Offer, sizeof (DHCP4_PACKET));
|
|
|
|
//
|
|
// Copy discover to request and offer to acknak.
|
|
//
|
|
CopyMem (
|
|
&This->Data->Request,
|
|
&This->Data->Discover,
|
|
sizeof (DHCP4_PACKET)
|
|
);
|
|
|
|
CopyMem (
|
|
&This->Data->AckNak,
|
|
&This->Data->Offer,
|
|
sizeof (DHCP4_PACKET)
|
|
);
|
|
|
|
//
|
|
// Set state flags.
|
|
//
|
|
This->Data->SelectCompleted = TRUE;
|
|
This->Data->IsAck = TRUE;
|
|
|
|
Private->callback = NULL;
|
|
return EFI_SUCCESS;
|
|
}
|
|
//
|
|
// Copy discover packet contents to request packet.
|
|
//
|
|
CopyMem (&request, &This->Data->Discover, sizeof (DHCP4_PACKET));
|
|
|
|
This->Data->IsAck = FALSE;
|
|
|
|
//
|
|
// Change DHCP message type from discover to request.
|
|
//
|
|
EfiStatus = find_opt (&request, DHCP4_MESSAGE_TYPE, 0, &op);
|
|
|
|
if (EFI_ERROR (EfiStatus) && EfiStatus != EFI_NOT_FOUND) {
|
|
Private->callback = NULL;
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (EfiStatus == EFI_NOT_FOUND) {
|
|
EfiStatus = find_opt (&request, DHCP4_END, 0, &op);
|
|
|
|
if (EFI_ERROR (EfiStatus)) {
|
|
Private->callback = NULL;
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
op->op = DHCP4_MESSAGE_TYPE;
|
|
op->len = 1;
|
|
|
|
op->data[1] = DHCP4_END;
|
|
}
|
|
|
|
op->data[0] = DHCP4_MESSAGE_TYPE_REQUEST;
|
|
|
|
//
|
|
// Copy server identifier option from offer to request.
|
|
//
|
|
EfiStatus = find_opt (Offer, DHCP4_SERVER_IDENTIFIER, 0, &srvid);
|
|
|
|
if (EFI_ERROR (EfiStatus)) {
|
|
Private->callback = NULL;
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (srvid->len != 4) {
|
|
Private->callback = NULL;
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
EfiStatus = add_opt (&request, srvid);
|
|
|
|
if (EFI_ERROR (EfiStatus)) {
|
|
DEBUG ((EFI_D_ERROR, "%r\n", EfiStatus));
|
|
Private->callback = NULL;
|
|
return EfiStatus;
|
|
}
|
|
//
|
|
// Add requested IP address option to request packet.
|
|
//
|
|
op = (DHCP4_OP *) buf;
|
|
op->op = DHCP4_REQUESTED_IP_ADDRESS;
|
|
op->len = 4;
|
|
CopyMem (op->data, &Offer->dhcp4.yiaddr, 4);
|
|
|
|
EfiStatus = add_opt (&request, op);
|
|
|
|
if (EFI_ERROR (EfiStatus)) {
|
|
DEBUG ((EFI_D_ERROR, "%r\n", EfiStatus));
|
|
Private->callback = NULL;
|
|
return EfiStatus;
|
|
}
|
|
//
|
|
// Transimit DHCP request and wait for DHCP ack...
|
|
//
|
|
SetMem (&bcast_ip, sizeof (EFI_IP_ADDRESS), 0xFF);
|
|
|
|
EfiStatus = tx_rx_udp (
|
|
Private,
|
|
&bcast_ip,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
&request,
|
|
&acknak,
|
|
&acknak_verify,
|
|
seconds_timeout
|
|
);
|
|
|
|
if (EFI_ERROR (EfiStatus)) {
|
|
DEBUG ((EFI_D_ERROR, "%r\n", EfiStatus));
|
|
Private->callback = NULL;
|
|
return EfiStatus;
|
|
}
|
|
//
|
|
// Set Data->IsAck and return.
|
|
//
|
|
EfiStatus = find_opt (&acknak, DHCP4_MESSAGE_TYPE, 0, &op);
|
|
|
|
if (EFI_ERROR (EfiStatus)) {
|
|
Private->callback = NULL;
|
|
return EFI_DEVICE_ERROR;
|
|
}
|
|
|
|
if (op->len != 1) {
|
|
Private->callback = NULL;
|
|
return EFI_DEVICE_ERROR;
|
|
}
|
|
|
|
switch (op->data[0]) {
|
|
case DHCP4_MESSAGE_TYPE_ACK:
|
|
This->Data->IsAck = TRUE;
|
|
break;
|
|
|
|
case DHCP4_MESSAGE_TYPE_NAK:
|
|
This->Data->IsAck = FALSE;
|
|
break;
|
|
|
|
default:
|
|
Private->callback = NULL;
|
|
return EFI_DEVICE_ERROR;
|
|
}
|
|
//
|
|
// Copy packets into instance data...
|
|
//
|
|
CopyMem (&This->Data->Offer, Offer, sizeof (DHCP4_PACKET));
|
|
CopyMem (&This->Data->Request, &request, sizeof (DHCP4_PACKET));
|
|
CopyMem (&This->Data->AckNak, &acknak, sizeof (DHCP4_PACKET));
|
|
|
|
This->Data->SelectCompleted = TRUE;
|
|
|
|
Private->callback = NULL;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/* eof - PxeDhcp4InitSelect.c */
|