blob: 82d2595847a8cf0f86f18f6ef8f196d01c33a7d6 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Simple network protocol
* PXE base code protocol
*
* Copyright (c) 2016 Alexander Graf
*
* The simple network protocol has the following statuses and services
* to move between them:
*
* Start(): EfiSimpleNetworkStopped -> EfiSimpleNetworkStarted
* Initialize(): EfiSimpleNetworkStarted -> EfiSimpleNetworkInitialized
* Shutdown(): EfiSimpleNetworkInitialized -> EfiSimpleNetworkStarted
* Stop(): EfiSimpleNetworkStarted -> EfiSimpleNetworkStopped
* Reset(): EfiSimpleNetworkInitialized -> EfiSimpleNetworkInitialized
*/
#include <common.h>
#include <efi_loader.h>
#include <malloc.h>
static const efi_guid_t efi_net_guid = EFI_SIMPLE_NETWORK_PROTOCOL_GUID;
static const efi_guid_t efi_pxe_base_code_protocol_guid =
EFI_PXE_BASE_CODE_PROTOCOL_GUID;
static struct efi_pxe_packet *dhcp_ack;
static bool new_rx_packet;
static void *new_tx_packet;
static void *transmit_buffer;
/*
* The notification function of this event is called in every timer cycle
* to check if a new network packet has been received.
*/
static struct efi_event *network_timer_event;
/*
* This event is signaled when a packet has been received.
*/
static struct efi_event *wait_for_packet;
/**
* struct efi_net_obj - EFI object representing a network interface
*
* @header: EFI object header
* @net: simple network protocol interface
* @net_mode: status of the network interface
* @pxe: PXE base code protocol interface
* @pxe_mode: status of the PXE base code protocol
*/
struct efi_net_obj {
struct efi_object header;
struct efi_simple_network net;
struct efi_simple_network_mode net_mode;
struct efi_pxe_base_code_protocol pxe;
struct efi_pxe_mode pxe_mode;
};
/*
* efi_net_start() - start the network interface
*
* This function implements the Start service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* Return: status code
*/
static efi_status_t EFIAPI efi_net_start(struct efi_simple_network *this)
{
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p", this);
/* Check parameters */
if (!this) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
if (this->mode->state != EFI_NETWORK_STOPPED) {
ret = EFI_ALREADY_STARTED;
} else {
this->int_status = 0;
wait_for_packet->is_signaled = false;
this->mode->state = EFI_NETWORK_STARTED;
}
out:
return EFI_EXIT(ret);
}
/*
* efi_net_stop() - stop the network interface
*
* This function implements the Stop service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* Return: status code
*/
static efi_status_t EFIAPI efi_net_stop(struct efi_simple_network *this)
{
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p", this);
/* Check parameters */
if (!this) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
if (this->mode->state == EFI_NETWORK_STOPPED) {
ret = EFI_NOT_STARTED;
} else {
/* Disable hardware and put it into the reset state */
eth_halt();
this->mode->state = EFI_NETWORK_STOPPED;
}
out:
return EFI_EXIT(ret);
}
/*
* efi_net_initialize() - initialize the network interface
*
* This function implements the Initialize service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* @extra_rx: extra receive buffer to be allocated
* @extra_tx: extra transmit buffer to be allocated
* Return: status code
*/
static efi_status_t EFIAPI efi_net_initialize(struct efi_simple_network *this,
ulong extra_rx, ulong extra_tx)
{
int ret;
efi_status_t r = EFI_SUCCESS;
EFI_ENTRY("%p, %lx, %lx", this, extra_rx, extra_tx);
/* Check parameters */
if (!this) {
r = EFI_INVALID_PARAMETER;
goto out;
}
switch (this->mode->state) {
case EFI_NETWORK_INITIALIZED:
case EFI_NETWORK_STARTED:
break;
default:
r = EFI_NOT_STARTED;
goto out;
}
/* Setup packet buffers */
net_init();
/* Disable hardware and put it into the reset state */
eth_halt();
/* Set current device according to environment variables */
eth_set_current();
/* Get hardware ready for send and receive operations */
ret = eth_init();
if (ret < 0) {
eth_halt();
this->mode->state = EFI_NETWORK_STOPPED;
r = EFI_DEVICE_ERROR;
goto out;
} else {
this->int_status = 0;
wait_for_packet->is_signaled = false;
this->mode->state = EFI_NETWORK_INITIALIZED;
}
out:
return EFI_EXIT(r);
}
/*
* efi_net_reset() - reinitialize the network interface
*
* This function implements the Reset service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* @extended_verification: execute exhaustive verification
* Return: status code
*/
static efi_status_t EFIAPI efi_net_reset(struct efi_simple_network *this,
int extended_verification)
{
efi_status_t ret;
EFI_ENTRY("%p, %x", this, extended_verification);
/* Check parameters */
if (!this) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
switch (this->mode->state) {
case EFI_NETWORK_INITIALIZED:
break;
case EFI_NETWORK_STOPPED:
ret = EFI_NOT_STARTED;
goto out;
default:
ret = EFI_DEVICE_ERROR;
goto out;
}
this->mode->state = EFI_NETWORK_STARTED;
ret = EFI_CALL(efi_net_initialize(this, 0, 0));
out:
return EFI_EXIT(ret);
}
/*
* efi_net_shutdown() - shut down the network interface
*
* This function implements the Shutdown service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* Return: status code
*/
static efi_status_t EFIAPI efi_net_shutdown(struct efi_simple_network *this)
{
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p", this);
/* Check parameters */
if (!this) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
switch (this->mode->state) {
case EFI_NETWORK_INITIALIZED:
break;
case EFI_NETWORK_STOPPED:
ret = EFI_NOT_STARTED;
goto out;
default:
ret = EFI_DEVICE_ERROR;
goto out;
}
eth_halt();
this->int_status = 0;
wait_for_packet->is_signaled = false;
this->mode->state = EFI_NETWORK_STARTED;
out:
return EFI_EXIT(ret);
}
/*
* efi_net_receive_filters() - mange multicast receive filters
*
* This function implements the ReceiveFilters service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* @enable: bit mask of receive filters to enable
* @disable: bit mask of receive filters to disable
* @reset_mcast_filter: true resets contents of the filters
* @mcast_filter_count: number of hardware MAC addresses in the new filters list
* @mcast_filter: list of new filters
* Return: status code
*/
static efi_status_t EFIAPI efi_net_receive_filters
(struct efi_simple_network *this, u32 enable, u32 disable,
int reset_mcast_filter, ulong mcast_filter_count,
struct efi_mac_address *mcast_filter)
{
EFI_ENTRY("%p, %x, %x, %x, %lx, %p", this, enable, disable,
reset_mcast_filter, mcast_filter_count, mcast_filter);
return EFI_EXIT(EFI_UNSUPPORTED);
}
/*
* efi_net_station_address() - set the hardware MAC address
*
* This function implements the StationAddress service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* @reset: if true reset the address to default
* @new_mac: new MAC address
* Return: status code
*/
static efi_status_t EFIAPI efi_net_station_address
(struct efi_simple_network *this, int reset,
struct efi_mac_address *new_mac)
{
EFI_ENTRY("%p, %x, %p", this, reset, new_mac);
return EFI_EXIT(EFI_UNSUPPORTED);
}
/*
* efi_net_statistics() - reset or collect statistics of the network interface
*
* This function implements the Statistics service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* @reset: if true, the statistics are reset
* @stat_size: size of the statistics table
* @stat_table: table to receive the statistics
* Return: status code
*/
static efi_status_t EFIAPI efi_net_statistics(struct efi_simple_network *this,
int reset, ulong *stat_size,
void *stat_table)
{
EFI_ENTRY("%p, %x, %p, %p", this, reset, stat_size, stat_table);
return EFI_EXIT(EFI_UNSUPPORTED);
}
/*
* efi_net_mcastiptomac() - translate multicast IP address to MAC address
*
* This function implements the MCastIPtoMAC service of the
* EFI_SIMPLE_NETWORK_PROTOCOL. See the Unified Extensible Firmware Interface
* (UEFI) specification for details.
*
* @this: pointer to the protocol instance
* @ipv6: true if the IP address is an IPv6 address
* @ip: IP address
* @mac: MAC address
* Return: status code
*/
static efi_status_t EFIAPI efi_net_mcastiptomac(struct efi_simple_network *this,
int ipv6,
struct efi_ip_address *ip,
struct efi_mac_address *mac)
{
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p, %x, %p, %p", this, ipv6, ip, mac);
if (!this || !ip || !mac) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
if (ipv6) {
ret = EFI_UNSUPPORTED;
goto out;
}
/* Multi-cast addresses are in the range 224.0.0.0 - 239.255.255.255 */
if ((ip->ip_addr[0] & 0xf0) != 0xe0) {
ret = EFI_INVALID_PARAMETER;
goto out;
};
switch (this->mode->state) {
case EFI_NETWORK_INITIALIZED:
case EFI_NETWORK_STARTED:
break;
default:
ret = EFI_NOT_STARTED;
goto out;
}
memset(mac, 0, sizeof(struct efi_mac_address));
/*
* Copy lower 23 bits of IPv4 multi-cast address
* RFC 1112, RFC 7042 2.1.1.
*/
mac->mac_addr[0] = 0x01;
mac->mac_addr[1] = 0x00;
mac->mac_addr[2] = 0x5E;
mac->mac_addr[3] = ip->ip_addr[1] & 0x7F;
mac->mac_addr[4] = ip->ip_addr[2];
mac->mac_addr[5] = ip->ip_addr[3];
out:
return EFI_EXIT(ret);
}
/**
* efi_net_nvdata() - read or write NVRAM
*
* This function implements the GetStatus service of the Simple Network
* Protocol. See the UEFI spec for details.
*
* @this: the instance of the Simple Network Protocol
* @read_write: true for read, false for write
* @offset: offset in NVRAM
* @buffer_size: size of buffer
* @buffer: buffer
* Return: status code
*/
static efi_status_t EFIAPI efi_net_nvdata(struct efi_simple_network *this,
int read_write, ulong offset,
ulong buffer_size, char *buffer)
{
EFI_ENTRY("%p, %x, %lx, %lx, %p", this, read_write, offset, buffer_size,
buffer);
return EFI_EXIT(EFI_UNSUPPORTED);
}
/**
* efi_net_get_status() - get interrupt status
*
* This function implements the GetStatus service of the Simple Network
* Protocol. See the UEFI spec for details.
*
* @this: the instance of the Simple Network Protocol
* @int_status: interface status
* @txbuf: transmission buffer
*/
static efi_status_t EFIAPI efi_net_get_status(struct efi_simple_network *this,
u32 *int_status, void **txbuf)
{
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p, %p, %p", this, int_status, txbuf);
efi_timer_check();
/* Check parameters */
if (!this) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
switch (this->mode->state) {
case EFI_NETWORK_STOPPED:
ret = EFI_NOT_STARTED;
goto out;
case EFI_NETWORK_STARTED:
ret = EFI_DEVICE_ERROR;
goto out;
default:
break;
}
if (int_status) {
*int_status = this->int_status;
this->int_status = 0;
}
if (txbuf)
*txbuf = new_tx_packet;
new_tx_packet = NULL;
out:
return EFI_EXIT(ret);
}
/**
* efi_net_transmit() - transmit a packet
*
* This function implements the Transmit service of the Simple Network Protocol.
* See the UEFI spec for details.
*
* @this: the instance of the Simple Network Protocol
* @header_size: size of the media header
* @buffer_size: size of the buffer to receive the packet
* @buffer: buffer to receive the packet
* @src_addr: source hardware MAC address
* @dest_addr: destination hardware MAC address
* @protocol: type of header to build
* Return: status code
*/
static efi_status_t EFIAPI efi_net_transmit
(struct efi_simple_network *this, size_t header_size,
size_t buffer_size, void *buffer,
struct efi_mac_address *src_addr,
struct efi_mac_address *dest_addr, u16 *protocol)
{
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p, %lu, %lu, %p, %p, %p, %p", this,
(unsigned long)header_size, (unsigned long)buffer_size,
buffer, src_addr, dest_addr, protocol);
efi_timer_check();
/* Check parameters */
if (!this || !buffer) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
/* We do not support jumbo packets */
if (buffer_size > PKTSIZE_ALIGN) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
/* At least the IP header has to fit into the buffer */
if (buffer_size < this->mode->media_header_size) {
ret = EFI_BUFFER_TOO_SMALL;
goto out;
}
/*
* TODO:
* Support VLANs. Use net_set_ether() for copying the header. Use a
* U_BOOT_ENV_CALLBACK to update the media header size.
*/
if (header_size) {
struct ethernet_hdr *header = buffer;
if (!dest_addr || !protocol ||
header_size != this->mode->media_header_size) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
if (!src_addr)
src_addr = &this->mode->current_address;
memcpy(header->et_dest, dest_addr, ARP_HLEN);
memcpy(header->et_src, src_addr, ARP_HLEN);
header->et_protlen = htons(*protocol);
}
switch (this->mode->state) {
case EFI_NETWORK_STOPPED:
ret = EFI_NOT_STARTED;
goto out;
case EFI_NETWORK_STARTED:
ret = EFI_DEVICE_ERROR;
goto out;
default:
break;
}
/* Ethernet packets always fit, just bounce */
memcpy(transmit_buffer, buffer, buffer_size);
net_send_packet(transmit_buffer, buffer_size);
new_tx_packet = buffer;
this->int_status |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
out:
return EFI_EXIT(ret);
}
/**
* efi_net_receive() - receive a packet from a network interface
*
* This function implements the Receive service of the Simple Network Protocol.
* See the UEFI spec for details.
*
* @this: the instance of the Simple Network Protocol
* @header_size: size of the media header
* @buffer_size: size of the buffer to receive the packet
* @buffer: buffer to receive the packet
* @src_addr: source MAC address
* @dest_addr: destination MAC address
* @protocol: protocol
* Return: status code
*/
static efi_status_t EFIAPI efi_net_receive
(struct efi_simple_network *this, size_t *header_size,
size_t *buffer_size, void *buffer,
struct efi_mac_address *src_addr,
struct efi_mac_address *dest_addr, u16 *protocol)
{
efi_status_t ret = EFI_SUCCESS;
struct ethernet_hdr *eth_hdr;
size_t hdr_size = sizeof(struct ethernet_hdr);
u16 protlen;
EFI_ENTRY("%p, %p, %p, %p, %p, %p, %p", this, header_size,
buffer_size, buffer, src_addr, dest_addr, protocol);
/* Execute events */
efi_timer_check();
/* Check parameters */
if (!this || !buffer || !buffer_size) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
switch (this->mode->state) {
case EFI_NETWORK_STOPPED:
ret = EFI_NOT_STARTED;
goto out;
case EFI_NETWORK_STARTED:
ret = EFI_DEVICE_ERROR;
goto out;
default:
break;
}
if (!new_rx_packet) {
ret = EFI_NOT_READY;
goto out;
}
/* Fill export parameters */
eth_hdr = (struct ethernet_hdr *)net_rx_packet;
protlen = ntohs(eth_hdr->et_protlen);
if (protlen == 0x8100) {
hdr_size += 4;
protlen = ntohs(*(u16 *)&net_rx_packet[hdr_size - 2]);
}
if (header_size)
*header_size = hdr_size;
if (dest_addr)
memcpy(dest_addr, eth_hdr->et_dest, ARP_HLEN);
if (src_addr)
memcpy(src_addr, eth_hdr->et_src, ARP_HLEN);
if (protocol)
*protocol = protlen;
if (*buffer_size < net_rx_packet_len) {
/* Packet doesn't fit, try again with bigger buffer */
*buffer_size = net_rx_packet_len;
ret = EFI_BUFFER_TOO_SMALL;
goto out;
}
/* Copy packet */
memcpy(buffer, net_rx_packet, net_rx_packet_len);
*buffer_size = net_rx_packet_len;
new_rx_packet = 0;
this->int_status &= ~EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
out:
return EFI_EXIT(ret);
}
/**
* efi_net_set_dhcp_ack() - take note of a selected DHCP IP address
*
* This function is called by dhcp_handler().
*
* @pkt: packet received by dhcp_handler()
* @len: length of the packet received
*/
void efi_net_set_dhcp_ack(void *pkt, int len)
{
int maxsize = sizeof(*dhcp_ack);
if (!dhcp_ack)
dhcp_ack = malloc(maxsize);
memcpy(dhcp_ack, pkt, min(len, maxsize));
}
/**
* efi_net_push() - callback for received network packet
*
* This function is called when a network packet is received by eth_rx().
*
* @pkt: network packet
* @len: length
*/
static void efi_net_push(void *pkt, int len)
{
new_rx_packet = true;
}
/**
* efi_network_timer_notify() - check if a new network packet has been received
*
* This notification function is called in every timer cycle.
*
* @event: the event for which this notification function is registered
* @context: event context - not used in this function
*/
static void EFIAPI efi_network_timer_notify(struct efi_event *event,
void *context)
{
struct efi_simple_network *this = (struct efi_simple_network *)context;
EFI_ENTRY("%p, %p", event, context);
/*
* Some network drivers do not support calling eth_rx() before
* initialization.
*/
if (!this || this->mode->state != EFI_NETWORK_INITIALIZED)
goto out;
if (!new_rx_packet) {
push_packet = efi_net_push;
eth_rx();
push_packet = NULL;
if (new_rx_packet) {
/* Check that we at least received an Ethernet header */
if (net_rx_packet_len >=
sizeof(struct ethernet_hdr)) {
this->int_status |=
EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
wait_for_packet->is_signaled = true;
} else {
new_rx_packet = 0;
}
}
}
out:
EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_pxe_base_code_start(
struct efi_pxe_base_code_protocol *this,
u8 use_ipv6)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_stop(
struct efi_pxe_base_code_protocol *this)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_dhcp(
struct efi_pxe_base_code_protocol *this,
u8 sort_offers)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_discover(
struct efi_pxe_base_code_protocol *this,
u16 type, u16 *layer, u8 bis,
struct efi_pxe_base_code_discover_info *info)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_mtftp(
struct efi_pxe_base_code_protocol *this,
u32 operation, void *buffer_ptr,
u8 overwrite, efi_uintn_t *buffer_size,
struct efi_ip_address server_ip, char *filename,
struct efi_pxe_base_code_mtftp_info *info,
u8 dont_use_buffer)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_udp_write(
struct efi_pxe_base_code_protocol *this,
u16 op_flags, struct efi_ip_address *dest_ip,
u16 *dest_port,
struct efi_ip_address *gateway_ip,
struct efi_ip_address *src_ip, u16 *src_port,
efi_uintn_t *header_size, void *header_ptr,
efi_uintn_t *buffer_size, void *buffer_ptr)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_udp_read(
struct efi_pxe_base_code_protocol *this,
u16 op_flags, struct efi_ip_address *dest_ip,
u16 *dest_port, struct efi_ip_address *src_ip,
u16 *src_port, efi_uintn_t *header_size,
void *header_ptr, efi_uintn_t *buffer_size,
void *buffer_ptr)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_set_ip_filter(
struct efi_pxe_base_code_protocol *this,
struct efi_pxe_base_code_filter *new_filter)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_arp(
struct efi_pxe_base_code_protocol *this,
struct efi_ip_address *ip_addr,
struct efi_mac_address *mac_addr)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_set_parameters(
struct efi_pxe_base_code_protocol *this,
u8 *new_auto_arp, u8 *new_send_guid,
u8 *new_ttl, u8 *new_tos,
u8 *new_make_callback)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_set_station_ip(
struct efi_pxe_base_code_protocol *this,
struct efi_ip_address *new_station_ip,
struct efi_ip_address *new_subnet_mask)
{
return EFI_UNSUPPORTED;
}
static efi_status_t EFIAPI efi_pxe_base_code_set_packets(
struct efi_pxe_base_code_protocol *this,
u8 *new_dhcp_discover_valid,
u8 *new_dhcp_ack_received,
u8 *new_proxy_offer_received,
u8 *new_pxe_discover_valid,
u8 *new_pxe_reply_received,
u8 *new_pxe_bis_reply_received,
EFI_PXE_BASE_CODE_PACKET *new_dchp_discover,
EFI_PXE_BASE_CODE_PACKET *new_dhcp_acc,
EFI_PXE_BASE_CODE_PACKET *new_proxy_offer,
EFI_PXE_BASE_CODE_PACKET *new_pxe_discover,
EFI_PXE_BASE_CODE_PACKET *new_pxe_reply,
EFI_PXE_BASE_CODE_PACKET *new_pxe_bis_reply)
{
return EFI_UNSUPPORTED;
}
/**
* efi_net_register() - register the simple network protocol
*
* This gets called from do_bootefi_exec().
*/
efi_status_t efi_net_register(void)
{
struct efi_net_obj *netobj = NULL;
efi_status_t r;
if (!eth_get_dev()) {
/* No network device active, don't expose any */
return EFI_SUCCESS;
}
/* We only expose the "active" network device, so one is enough */
netobj = calloc(1, sizeof(*netobj));
if (!netobj)
goto out_of_resources;
/* Allocate an aligned transmit buffer */
transmit_buffer = calloc(1, PKTSIZE_ALIGN + PKTALIGN);
if (!transmit_buffer)
goto out_of_resources;
transmit_buffer = (void *)ALIGN((uintptr_t)transmit_buffer, PKTALIGN);
/* Hook net up to the device list */
efi_add_handle(&netobj->header);
/* Fill in object data */
r = efi_add_protocol(&netobj->header, &efi_net_guid,
&netobj->net);
if (r != EFI_SUCCESS)
goto failure_to_add_protocol;
r = efi_add_protocol(&netobj->header, &efi_guid_device_path,
efi_dp_from_eth());
if (r != EFI_SUCCESS)
goto failure_to_add_protocol;
r = efi_add_protocol(&netobj->header, &efi_pxe_base_code_protocol_guid,
&netobj->pxe);
if (r != EFI_SUCCESS)
goto failure_to_add_protocol;
netobj->net.revision = EFI_SIMPLE_NETWORK_PROTOCOL_REVISION;
netobj->net.start = efi_net_start;
netobj->net.stop = efi_net_stop;
netobj->net.initialize = efi_net_initialize;
netobj->net.reset = efi_net_reset;
netobj->net.shutdown = efi_net_shutdown;
netobj->net.receive_filters = efi_net_receive_filters;
netobj->net.station_address = efi_net_station_address;
netobj->net.statistics = efi_net_statistics;
netobj->net.mcastiptomac = efi_net_mcastiptomac;
netobj->net.nvdata = efi_net_nvdata;
netobj->net.get_status = efi_net_get_status;
netobj->net.transmit = efi_net_transmit;
netobj->net.receive = efi_net_receive;
netobj->net.mode = &netobj->net_mode;
netobj->net_mode.state = EFI_NETWORK_STOPPED;
memcpy(netobj->net_mode.current_address.mac_addr, eth_get_ethaddr(), 6);
netobj->net_mode.hwaddr_size = ARP_HLEN;
netobj->net_mode.media_header_size = ETHER_HDR_SIZE;
netobj->net_mode.max_packet_size = PKTSIZE;
netobj->net_mode.if_type = ARP_ETHER;
netobj->pxe.revision = EFI_PXE_BASE_CODE_PROTOCOL_REVISION;
netobj->pxe.start = efi_pxe_base_code_start;
netobj->pxe.stop = efi_pxe_base_code_stop;
netobj->pxe.dhcp = efi_pxe_base_code_dhcp;
netobj->pxe.discover = efi_pxe_base_code_discover;
netobj->pxe.mtftp = efi_pxe_base_code_mtftp;
netobj->pxe.udp_write = efi_pxe_base_code_udp_write;
netobj->pxe.udp_read = efi_pxe_base_code_udp_read;
netobj->pxe.set_ip_filter = efi_pxe_base_code_set_ip_filter;
netobj->pxe.arp = efi_pxe_base_code_arp;
netobj->pxe.set_parameters = efi_pxe_base_code_set_parameters;
netobj->pxe.set_station_ip = efi_pxe_base_code_set_station_ip;
netobj->pxe.set_packets = efi_pxe_base_code_set_packets;
netobj->pxe.mode = &netobj->pxe_mode;
if (dhcp_ack)
netobj->pxe_mode.dhcp_ack = *dhcp_ack;
/*
* Create WaitForPacket event.
*/
r = efi_create_event(EVT_NOTIFY_WAIT, TPL_CALLBACK,
efi_network_timer_notify, NULL, NULL,
&wait_for_packet);
if (r != EFI_SUCCESS) {
printf("ERROR: Failed to register network event\n");
return r;
}
netobj->net.wait_for_packet = wait_for_packet;
/*
* Create a timer event.
*
* The notification function is used to check if a new network packet
* has been received.
*
* iPXE is running at TPL_CALLBACK most of the time. Use a higher TPL.
*/
r = efi_create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL, TPL_NOTIFY,
efi_network_timer_notify, &netobj->net, NULL,
&network_timer_event);
if (r != EFI_SUCCESS) {
printf("ERROR: Failed to register network event\n");
return r;
}
/* Network is time critical, create event in every timer cycle */
r = efi_set_timer(network_timer_event, EFI_TIMER_PERIODIC, 0);
if (r != EFI_SUCCESS) {
printf("ERROR: Failed to set network timer\n");
return r;
}
return EFI_SUCCESS;
failure_to_add_protocol:
printf("ERROR: Failure to add protocol\n");
return r;
out_of_resources:
free(netobj);
/* free(transmit_buffer) not needed yet */
printf("ERROR: Out of memory\n");
return EFI_OUT_OF_RESOURCES;
}