[PATCH v2 04/14] net-lwip: add DHCP support and dhcp commmand
Jerome Forissier
jerome.forissier at linaro.org
Fri May 24 18:19:58 CEST 2024
Add what it takes to enable NETDEVICES with NET_LWIP and enable DHCP as
well as the dhcp command.
- net-lwip/net-lwip.c is mostly empty for now. It will provide functions
similar to net/net.c except based on the lwIP stack
- include/net-lwip.h is a replacement for include/net.h which is unused
when NET_LWIP is enabled. Declarations from the latter will be
transferred to the former as needed when new network commands are ported
on top of lwIP.
- CMD_TFTPBOOT is selected by BOOTMETH_EFI due to this code having
an implicit dependency on do_tftpb().
Signed-off-by: Jerome Forissier <jerome.forissier at linaro.org>
---
Makefile | 1 +
boot/Kconfig | 3 +-
cmd/Kconfig | 26 +++++
cmd/Makefile | 4 +
cmd/net-lwip.c | 13 +++
common/board_r.c | 4 +-
drivers/net/Kconfig | 2 +-
include/net-lwip.h | 85 +++++++++++++++
include/net.h | 2 +-
net-lwip/Kconfig | 41 +++++++-
net-lwip/Makefile | 15 +++
net-lwip/dhcp.c | 105 +++++++++++++++++++
net-lwip/eth_internal.h | 35 +++++++
net-lwip/net-lwip.c | 224 ++++++++++++++++++++++++++++++++++++++++
net-lwip/tftp.c | 11 ++
15 files changed, 564 insertions(+), 7 deletions(-)
create mode 100644 cmd/net-lwip.c
create mode 100644 include/net-lwip.h
create mode 100644 net-lwip/Makefile
create mode 100644 net-lwip/dhcp.c
create mode 100644 net-lwip/eth_internal.h
create mode 100644 net-lwip/net-lwip.c
create mode 100644 net-lwip/tftp.c
diff --git a/Makefile b/Makefile
index 3df9c45a17c..d59b914071f 100644
--- a/Makefile
+++ b/Makefile
@@ -860,6 +860,7 @@ libs-y += env/
libs-y += lib/
libs-y += fs/
libs-$(CONFIG_NET) += net/
+libs-$(CONFIG_NET_LWIP) += net-lwip/
libs-y += disk/
libs-y += drivers/
libs-$(CONFIG_SYS_FSL_DDR) += drivers/ddr/fsl/
diff --git a/boot/Kconfig b/boot/Kconfig
index 6f3096c15a6..004e69dd92a 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -378,7 +378,7 @@ config BOOT_DEFAULTS_CMDS
select CMD_FAT
select CMD_FS_GENERIC
select CMD_PART if PARTITIONS
- select CMD_DHCP if CMD_NET
+ select CMD_DHCP if CMD_NET || CMD_NET_LWIP
select CMD_PING if CMD_NET
select CMD_PXE if CMD_NET
select CMD_BOOTI if ARM64
@@ -540,6 +540,7 @@ config BOOTMETH_EXTLINUX_PXE
config BOOTMETH_EFILOADER
bool "Bootdev support for EFI boot"
depends on EFI_BINARY_EXEC
+ select CMD_TFTPBOOT if CMD_NET_LWIP
default y
help
Enables support for EFI boot using bootdevs. This makes the
diff --git a/cmd/Kconfig b/cmd/Kconfig
index b026439c773..1bfa528e945 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -2084,6 +2084,32 @@ config CMD_WOL
endif
+if NET_LWIP
+
+menuconfig CMD_NET_LWIP
+ bool "Network commands (lwIP)"
+ default y
+
+if CMD_NET_LWIP
+
+config CMD_DHCP
+ bool "dhcp"
+ select PROT_DHCP_LWIP
+ help
+ Boot image via network using DHCP/TFTP protocol
+
+config CMD_TFTPBOOT
+ bool "tftp"
+ select PROT_UDP_LWIP
+ default n
+ help
+ tftpboot - load file via network using TFTP protocol
+ Currently a placeholder (not implemented)
+
+endif
+
+endif
+
menu "Misc commands"
config CMD_2048
diff --git a/cmd/Makefile b/cmd/Makefile
index 87133cc27a8..535b6838ca5 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -128,6 +128,10 @@ endif
obj-$(CONFIG_CMD_MUX) += mux.o
obj-$(CONFIG_CMD_NAND) += nand.o
obj-$(CONFIG_CMD_NET) += net.o
+obj-$(CONFIG_CMD_NET_LWIP) += net-lwip.o
+ifdef CONFIG_CMD_NET_LWIP
+CFLAGS_net-lwip.o := -I$(srctree)/lib/lwip/lwip/src/include -I$(srctree)/lib/lwip/u-boot
+endif
obj-$(CONFIG_ENV_SUPPORT) += nvedit.o
obj-$(CONFIG_CMD_NVEDIT_EFI) += nvedit_efi.o
obj-$(CONFIG_CMD_ONENAND) += onenand.o
diff --git a/cmd/net-lwip.c b/cmd/net-lwip.c
new file mode 100644
index 00000000000..966d7226eda
--- /dev/null
+++ b/cmd/net-lwip.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (C) 2024 Linaro Ltd. */
+
+#include <command.h>
+#include <net-lwip.h>
+
+#if defined(CONFIG_CMD_DHCP)
+U_BOOT_CMD(
+ dhcp, 3, 1, do_dhcp,
+ "boot image via network using DHCP/TFTP protocol",
+ "[loadAddress] [[hostIPaddr:]bootfilename]"
+);
+#endif
diff --git a/common/board_r.c b/common/board_r.c
index da0b80f24ff..6548eb8fdd5 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -472,7 +472,7 @@ static int initr_status_led(void)
}
#endif
-#ifdef CONFIG_CMD_NET
+#if defined(CONFIG_CMD_NET) || defined(CONFIG_CMD_NET_LWIP)
static int initr_net(void)
{
puts("Net: ");
@@ -727,7 +727,7 @@ static init_fnc_t init_sequence_r[] = {
#ifdef CONFIG_PCI_ENDPOINT
pci_ep_init,
#endif
-#ifdef CONFIG_CMD_NET
+#if defined(CONFIG_CMD_NET) || defined(CONFIG_CMD_NET_LWIP)
INIT_FUNC_WATCHDOG_RESET
initr_net,
#endif
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index b2d7b499766..4ba09c9d6f8 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -96,7 +96,7 @@ config DSA_SANDBOX
menuconfig NETDEVICES
bool "Network device support"
- depends on NET
+ depends on NET || NET_LWIP
select DM_ETH
help
You must select Y to enable any network device support
diff --git a/include/net-lwip.h b/include/net-lwip.h
new file mode 100644
index 00000000000..2308703e46b
--- /dev/null
+++ b/include/net-lwip.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __NET_LWIP_H__
+#define __NET_LWIP_H__
+
+#include <asm/cache.h>
+#include <linux/types.h>
+#include <lwip/netif.h>
+#include <time.h>
+
+/*
+ * The number of receive packet buffers, and the required packet buffer
+ * alignment in memory.
+ *
+ */
+#define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER
+#define PKTALIGN ARCH_DMA_MINALIGN
+
+/* ARP hardware address length */
+#define ARP_HLEN 6
+
+/*
+ * Maximum packet size; used to allocate packet storage. Use
+ * the maxium Ethernet frame size as specified by the Ethernet
+ * standard including the 802.1Q tag (VLAN tagging).
+ * maximum packet size = 1522
+ * maximum packet size and multiple of 32 bytes = 1536
+ */
+#define PKTSIZE 1522
+#ifndef CONFIG_DM_DSA
+#define PKTSIZE_ALIGN 1536
+#else
+/* Maximum DSA tagging overhead (headroom and/or tailroom) */
+#define DSA_MAX_OVR 256
+#define PKTSIZE_ALIGN (1536 + DSA_MAX_OVR)
+#endif
+
+struct udevice *eth_get_dev(void); /* get the current device */
+/*
+ * Get the hardware address for an ethernet interface .
+ * Args:
+ * base_name - base name for device (normally "eth")
+ * index - device index number (0 for first)
+ * enetaddr - returns 6 byte hardware address
+ * Returns:
+ * Return true if the address is valid.
+ */
+int eth_env_get_enetaddr_by_index(const char *base_name, int index,
+ uchar *enetaddr);
+int eth_init(void); /* Initialize the device */
+int eth_send(void *packet, int length); /* Send a packet */
+int eth_rx(void);
+int eth_get_dev_index(void);
+int eth_init_state_only(void); /* Set active state */
+void eth_set_current(void); /* set nterface to ethcur var */
+
+struct ethernet_hdr {
+ u8 et_dest[ARP_HLEN]; /* Destination node */
+ u8 et_src[ARP_HLEN]; /* Source node */
+ u16 et_protlen; /* Protocol or length */
+} __attribute__((packed));
+
+/* Ethernet header size */
+#define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
+
+/**
+ * string_to_enetaddr() - Parse a MAC address
+ *
+ * Convert a string MAC address
+ *
+ * Implemented in lib/net_utils.c (built unconditionally)
+ *
+ * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit
+ * hex value
+ * @enetaddr: Place to put MAC address (6 bytes)
+ */
+void string_to_enetaddr(const char *addr, uint8_t *enetaddr);
+
+int net_lwip_init(void);
+struct netif *net_lwip_get_netif(void);
+
+int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
+int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
+
+#endif /* __NET_LWIP_H__ */
diff --git a/include/net.h b/include/net.h
index ac511eab103..330bc6bf66c 100644
--- a/include/net.h
+++ b/include/net.h
@@ -914,7 +914,7 @@ static inline struct in_addr env_get_ip(char *var)
*/
void reset_phy(void);
-#if CONFIG_IS_ENABLED(NET)
+#if CONFIG_IS_ENABLED(NET) || CONFIG_IS_ENABLED(NET_LWIP)
/**
* eth_set_enable_bootdevs() - Enable or disable binding of Ethernet bootdevs
*
diff --git a/net-lwip/Kconfig b/net-lwip/Kconfig
index 7d9ec8fdfbd..9e611f805ad 100644
--- a/net-lwip/Kconfig
+++ b/net-lwip/Kconfig
@@ -4,6 +4,7 @@
menuconfig NET_LWIP
bool "Networking support (lwIP stack) -- EXPERIMENTAL"
+ imply NETDEVICES
help
Include networking support based on the lwIP (lightweight IP)
TCP/IP stack (https://nongnu.org/lwip). This is a replacement for
@@ -12,5 +13,41 @@ menuconfig NET_LWIP
depend on CONFIG_NET (such as cmd/net.c enabled via CONFIG_CMD_NET).
Therefore the two symbols CONFIG_NET and CONFIG_NET_LWIP are mutually
exclusive.
- NOTE: This currently only builds the lwIP library but does not add
- any functionality to U-Boot.
+
+if NET_LWIP
+
+config LWIP_DEBUG
+ bool "Enable debug traces in the lwIP library"
+
+config LWIP_ASSERT
+ bool "Enable assertions in the lwIP library"
+
+config PROT_DHCP_LWIP
+ bool "DHCP support in lwIP"
+ depends on PROT_UDP_LWIP
+ help
+ Enable support for the DHCP protocol in lwIP.
+
+config PROT_DNS_LWIP
+ bool
+ depends on PROT_UDP_LWIP
+
+config PROT_RAW_LWIP
+ bool
+
+config PROT_TCP_LWIP
+ bool
+
+config PROT_UDP_LWIP
+ bool
+
+config BOOTDEV_ETH
+ bool "Enable bootdev for ethernet"
+ depends on BOOTSTD
+ default y
+ help
+ Provide a bootdev for ethernet so that is it possible to boot
+ an operating system over the network, using the PXE (Preboot
+ Execution Environment) protocol.
+
+endif
diff --git a/net-lwip/Makefile b/net-lwip/Makefile
new file mode 100644
index 00000000000..a56c32bfa74
--- /dev/null
+++ b/net-lwip/Makefile
@@ -0,0 +1,15 @@
+ccflags-y += -I$(srctree)/lib/lwip/lwip/src/include -I$(srctree)/lib/lwip/u-boot
+
+obj-$(CONFIG_$(SPL_TPL_)BOOTDEV_ETH) += ../net/eth_bootdev.o
+obj-$(CONFIG_DM_MDIO) += ../net/mdio-uclass.o
+obj-$(CONFIG_DM_MDIO_MUX) += ../net/mdio-mux-uclass.o
+obj-$(CONFIG_$(SPL_)DM_ETH) += ../net/eth_common.o
+obj-$(CONFIG_$(SPL_)DM_ETH) += ../net/eth-uclass.o
+obj-$(CONFIG_$(SPL_)DM_ETH) += net-lwip.o
+obj-$(CONFIG_CMD_DHCP) += dhcp.o
+obj-$(CONFIG_CMD_TFTPBOOT) += tftp.o
+
+# Disable this warning as it is triggered by:
+# sprintf(buf, index ? "foo%d" : "foo", index)
+# and this is intentional usage.
+CFLAGS_eth_common.o += -Wno-format-extra-args
diff --git a/net-lwip/dhcp.c b/net-lwip/dhcp.c
new file mode 100644
index 00000000000..d1d35999b04
--- /dev/null
+++ b/net-lwip/dhcp.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (C) 2024 Linaro Ltd. */
+
+#include <command.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <lwip/dhcp.h>
+#include <lwip/dns.h>
+#include <lwip/timeouts.h>
+#include <net-lwip.h>
+#include <time.h>
+
+#define DHCP_TIMEOUT_MS 2000
+
+#ifdef CONFIG_CMD_TFTPBOOT
+/* Boot file obtained from DHCP (if present) */
+static char boot_file_name[DHCP_BOOT_FILE_LEN];
+#endif
+
+static void call_lwip_dhcp_fine_tmr(void *ctx)
+{
+ dhcp_fine_tmr();
+}
+
+int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
+{
+ unsigned long start;
+ struct netif *netif;
+ struct dhcp *dhcp;
+ bool bound;
+
+ /* Running DHCP on the primary interface only */
+ if (eth_get_dev_index() != 0)
+ return -EINVAL;
+
+ net_lwip_init();
+
+ netif = net_lwip_get_netif();
+ if (!netif)
+ return CMD_RET_FAILURE;
+
+ /*
+ * The fine timer is half a second, it deals with the initial DHCP
+ * request.
+ * We don't bother with the coarse timer (1 minute) which handles the
+ * DHCP lease renewal.
+ */
+ sys_timeout(500, call_lwip_dhcp_fine_tmr, NULL);
+ start = get_timer(0);
+ dhcp_start(netif);
+
+ /* Wait for DHCP to complete */
+ do {
+ eth_rx();
+ sys_check_timeouts();
+ bound = dhcp_supplied_address(netif);
+ if (bound)
+ break;
+ } while (get_timer(start) < DHCP_TIMEOUT_MS);
+
+ sys_untimeout(call_lwip_dhcp_fine_tmr, NULL);
+
+ if (!bound)
+ return CMD_RET_FAILURE;
+
+ dhcp = netif_dhcp_data(netif);
+
+ env_set("bootfile", dhcp->boot_file_name);
+ if (dhcp->offered_gw_addr.addr != 0) {
+
+ env_set("gatewayip", ip4addr_ntoa(&dhcp->offered_gw_addr));
+ /* Set this interface as the default for IP routing */
+ netif_set_default(netif);
+ }
+ env_set("ipaddr", ip4addr_ntoa(&dhcp->offered_ip_addr));
+ env_set("netmask", ip4addr_ntoa(&dhcp->offered_sn_mask));
+ env_set("serverip", ip4addr_ntoa(&dhcp->server_ip_addr));
+#ifdef CONFIG_PROT_DNS_LWIP
+ env_set("dnsip", ip4addr_ntoa(dns_getserver(0)));
+ env_set("dnsip2", ip4addr_ntoa(dns_getserver(1)));
+#endif
+#ifdef CONFIG_CMD_TFTPBOOT
+ if (dhcp->boot_file_name[0] != '\0')
+ strncpy(boot_file_name, dhcp->boot_file_name,
+ sizeof(boot_file_name));
+#endif
+
+ printf("DHCP client bound to address %pI4 (%lu ms)\n",
+ &dhcp->offered_ip_addr, get_timer(start));
+
+ return CMD_RET_SUCCESS;
+}
+
+int dhcp_run(ulong addr, const char *fname, bool autoload)
+{
+ char *dhcp_argv[] = {"dhcp", NULL, };
+ struct cmd_tbl cmdtp = {}; /* dummy */
+
+ if (autoload) {
+ /* Will be supported when TFTP is added */
+ return -EOPNOTSUPP;
+ }
+
+ return do_dhcp(&cmdtp, 0, 1, dhcp_argv);
+}
diff --git a/net-lwip/eth_internal.h b/net-lwip/eth_internal.h
new file mode 100644
index 00000000000..0b829a8d388
--- /dev/null
+++ b/net-lwip/eth_internal.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2001-2015
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ * Joe Hershberger, National Instruments
+ */
+
+#ifndef __ETH_INTERNAL_H
+#define __ETH_INTERNAL_H
+
+/* Do init that is common to driver model and legacy networking */
+void eth_common_init(void);
+
+/**
+ * eth_env_set_enetaddr_by_index() - set the MAC address environment variable
+ *
+ * This sets up an environment variable with the given MAC address (@enetaddr).
+ * The environment variable to be set is defined by <@base_name><@index>addr.
+ * If @index is 0 it is omitted. For common Ethernet this means ethaddr,
+ * eth1addr, etc.
+ *
+ * @base_name: Base name for variable, typically "eth"
+ * @index: Index of interface being updated (>=0)
+ * @enetaddr: Pointer to MAC address to put into the variable
+ * Return: 0 if OK, other value on error
+ */
+int eth_env_set_enetaddr_by_index(const char *base_name, int index,
+ uchar *enetaddr);
+
+int eth_mac_skip(int index);
+void eth_current_changed(void);
+void eth_set_dev(struct udevice *dev);
+void eth_set_current_to_next(void);
+
+#endif
diff --git a/net-lwip/net-lwip.c b/net-lwip/net-lwip.c
new file mode 100644
index 00000000000..886028b68c3
--- /dev/null
+++ b/net-lwip/net-lwip.c
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* Copyright (C) 2024 Linaro Ltd. */
+
+#include <command.h>
+#include <dm/device.h>
+#include <dm/uclass.h>
+#include <lwip/ip4_addr.h>
+#include <lwip/err.h>
+#include <lwip/netif.h>
+#include <lwip/pbuf.h>
+#include <lwip/etharp.h>
+#include <lwip/prot/etharp.h>
+#include <net-lwip.h>
+
+/* xx:xx:xx:xx:xx:xx\0 */
+#define MAC_ADDR_STRLEN 18
+
+#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
+void (*push_packet)(void *, int len) = 0;
+#endif
+int net_restart_wrap;
+static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
+uchar *net_rx_packets[PKTBUFSRX];
+uchar *net_rx_packet;
+uchar *net_tx_packet;
+
+static err_t low_level_output(struct netif *netif, struct pbuf *p)
+{
+ int err;
+
+ /* switch dev to active state */
+ eth_init_state_only();
+
+ err = eth_send(p->payload, p->len);
+ if (err) {
+ log_err("eth_send error %d\n", err);
+ return ERR_ABRT;
+ }
+ return ERR_OK;
+}
+
+static err_t net_lwip_if_init(struct netif *netif)
+{
+#if LWIP_IPV4
+ netif->output = etharp_output;
+#endif
+ netif->linkoutput = low_level_output;
+ netif->mtu = 1500;
+ netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
+
+ return ERR_OK;
+}
+
+static void eth_init_rings(void)
+{
+ static bool called;
+ int i;
+
+ if (called)
+ return;
+ called = true;
+
+ net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
+ net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
+ for (i = 0; i < PKTBUFSRX; i++)
+ net_rx_packets[i] = net_tx_packet + (i + 1) * PKTSIZE_ALIGN;
+}
+
+int net_lwip_init(void)
+{
+ ip4_addr_t ipaddr, netmask, gw;
+ struct netif *unetif;
+ struct udevice *udev;
+ int ret;
+ unsigned char env_enetaddr[ARP_HLEN];
+ const struct udevice *dev;
+ struct uclass *uc;
+
+ eth_set_current();
+
+ udev = eth_get_dev();
+ if (!udev) {
+ log_err("no active eth device\n");
+ return ERR_IF;
+ }
+
+ eth_init_rings();
+
+ ret = eth_init();
+ if (ret) {
+ log_err("eth_init error %d\n", ret);
+ return ERR_IF;
+ }
+
+ uclass_id_foreach_dev(UCLASS_ETH, dev, uc) {
+ char ipstr[IP4ADDR_STRLEN_MAX];
+ char maskstr[IP4ADDR_STRLEN_MAX];
+ char gwstr[IP4ADDR_STRLEN_MAX];
+ char hwstr[MAC_ADDR_STRLEN];
+ char *env;
+
+ eth_env_get_enetaddr_by_index("eth", dev_seq(dev), env_enetaddr);
+ log_info("eth%d: %s %pM %s\n", dev_seq(dev), dev->name, env_enetaddr,
+ udev == dev ? "active" : "");
+
+ unetif = malloc(sizeof(struct netif));
+ if (!unetif)
+ return ERR_MEM;
+ memset(unetif, 0, sizeof(struct netif));
+
+ ip4_addr_set_zero(&gw);
+ ip4_addr_set_zero(&ipaddr);
+ ip4_addr_set_zero(&netmask);
+
+ if (dev_seq(dev) == 0) {
+ snprintf(ipstr, IP4ADDR_STRLEN_MAX, "ipaddr");
+ snprintf(maskstr, IP4ADDR_STRLEN_MAX, "netmask");
+ snprintf(gwstr, IP4ADDR_STRLEN_MAX, "gw");
+ } else {
+ snprintf(ipstr, IP4ADDR_STRLEN_MAX, "ipaddr%d", dev_seq(dev));
+ snprintf(maskstr, IP4ADDR_STRLEN_MAX, "netmask%d", dev_seq(dev));
+ snprintf(gwstr, IP4ADDR_STRLEN_MAX, "gw%d", dev_seq(dev));
+ }
+ snprintf(hwstr, MAC_ADDR_STRLEN, "%pM", env_enetaddr);
+ snprintf(unetif->name, 2, "%d", dev_seq(dev));
+
+ string_to_enetaddr(hwstr, unetif->hwaddr);
+ unetif->hwaddr_len = ETHARP_HWADDR_LEN;
+
+ env = env_get(ipstr);
+ if (env)
+ ipaddr_aton(env, &ipaddr);
+
+ env = env_get(maskstr);
+ if (env)
+ ipaddr_aton(env, &netmask);
+
+ if (!netif_add(unetif, &ipaddr, &netmask, &gw,
+ unetif, net_lwip_if_init, netif_input)) {
+ log_err("err: netif_add failed!\n");
+ free(unetif);
+ return ERR_IF;
+ }
+
+ netif_set_up(unetif);
+ netif_set_link_up(unetif);
+ }
+
+ return CMD_RET_SUCCESS;
+}
+
+/*
+ * Return the current network interface for lwIP. In other words, the struct
+ * netif that corresponds to eth_get_dev().
+ */
+struct netif *net_lwip_get_netif(void)
+{
+ int idx;
+
+ idx = eth_get_dev_index();
+ if (idx < 0)
+ return NULL;
+
+ return netif_get_by_index(idx + 1);
+}
+
+int net_init(void)
+{
+ return net_lwip_init();
+}
+
+static struct pbuf *alloc_pbuf_and_copy(uchar *data, int len)
+{
+ struct pbuf *p, *q;
+
+ /* We allocate a pbuf chain of pbufs from the pool. */
+ p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
+ if (!p) {
+ LINK_STATS_INC(link.memerr);
+ LINK_STATS_INC(link.drop);
+ return NULL;
+ }
+
+ for (q = p; q != NULL; q = q->next) {
+ memcpy(q->payload, data, q->len);
+ data += q->len;
+ }
+
+ LINK_STATS_INC(link.recv);
+
+ return p;
+}
+
+void net_process_received_packet(uchar *in_packet, int len)
+{
+ struct netif *netif;
+ struct pbuf *pbuf;
+
+ if (len < ETHER_HDR_SIZE)
+ return;
+
+#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
+ if (push_packet) {
+ (*push_packet)(in_packet, len);
+ return;
+ }
+#endif
+
+ netif = net_lwip_get_netif();
+ if (!netif)
+ return;
+
+ pbuf = alloc_pbuf_and_copy(in_packet, len);
+ if (!pbuf)
+ return;
+
+ netif->input(pbuf, netif);
+}
+
+u32_t sys_now(void)
+{
+ return get_timer(0);
+}
diff --git a/net-lwip/tftp.c b/net-lwip/tftp.c
new file mode 100644
index 00000000000..1fa246f55d9
--- /dev/null
+++ b/net-lwip/tftp.c
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (C) 2024 Linaro Ltd. */
+
+#include <command.h>
+#include <net-lwip.h>
+
+int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
+{
+ /* Not implemented */
+ return CMD_RET_FAILURE;
+}
--
2.40.1
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