[PATCH 09/15] net-lwip: add support for EFI_HTTP_BOOT

[Jerome Forissier]

Implement the wget_with_dns() function which is needed by
CONFIG_EFI_HTTP_BOOT=y. Note that there is no dependency added on
CONFIG_CMD_DNS_LWIP because CONFIG_CMD_WGET_LWIP natively supports
hostname resolution.

Signed-off-by: Jerome Forissier <jerome.forissier at linaro.org>
---
 lib/efi_loader/Kconfig |  5 +++--
 net-lwip/wget.c        | 16 ++++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 430bb7f0f7..9d8dc8c756 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -505,8 +505,9 @@ config EFI_RISCV_BOOT_PROTOCOL
 
 config EFI_HTTP_BOOT
 	bool "EFI HTTP Boot support"
-	select CMD_DNS
-	select CMD_WGET
+	select CMD_DNS if NET
+	select CMD_WGET if NET
+	select CMD_WGET_LWIP if NET_LWIP
 	select BLKMAP
 	help
 	  Enabling this option adds EFI HTTP Boot support. It allows to
diff --git a/net-lwip/wget.c b/net-lwip/wget.c
index 0ed8b77c47..a3e65dc80e 100644
--- a/net-lwip/wget.c
+++ b/net-lwip/wget.c
@@ -166,3 +166,19 @@ int do_wget(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
 
 	return CMD_RET_FAILURE;
 }
+
+#if defined(CONFIG_EFI_HTTP_BOOT)
+int wget_with_dns(ulong dst_addr, char *uri)
+{
+	char addr_str[11];
+	struct cmd_tbl cmdtp = {};
+	char *argv[] = { "wget", addr_str, uri };
+
+	snprintf(addr_str, sizeof(addr_str), "0x%lx", dst_addr);
+
+	if (do_wget(&cmdtp, 0, ARRAY_SIZE(argv), argv) == CMD_RET_SUCCESS)
+		return 0;
+
+	return -1;
+}
+#endif
-- 
2.40.1