[PATCH v3 6/7] cmd: efidebug: add uri device path

[Masahisa Kojima]

This adds the URI device path option for 'boot add' subcommand.
User can add the URI load option for downloading ISO image file
or EFI application through network. Currently HTTP is only supported.

Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
---
 cmd/efidebug.c | 50 +++++++++++++++++++++++++++++++++++
 include/net.h  |  1 +
 net/wget.c     | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 123 insertions(+)

diff --git a/cmd/efidebug.c b/cmd/efidebug.c
index 0be3af3e76..f2fd6ba71d 100644
--- a/cmd/efidebug.c
+++ b/cmd/efidebug.c
@@ -19,6 +19,7 @@
 #include <log.h>
 #include <malloc.h>
 #include <mapmem.h>
+#include <net.h>
 #include <part.h>
 #include <search.h>
 #include <linux/ctype.h>
@@ -829,6 +830,52 @@ static int do_efi_boot_add(struct cmd_tbl *cmdtp, int flag,
 			argc -= 1;
 			argv += 1;
 			break;
+#if (IS_ENABLED(CONFIG_BLKMAP) && IS_ENABLED(CONFIG_CMD_WGET) && IS_ENABLED(CONFIG_CMD_DNS))
+		case 'u':
+		{
+			char *pos;
+			int uridp_len;
+			struct efi_device_path_uri *uridp;
+
+			if (argc <  3 || lo.label) {
+				r = CMD_RET_USAGE;
+				goto out;
+			}
+			id = (int)hextoul(argv[1], &endp);
+			if (*endp != '\0' || id > 0xffff)
+				return CMD_RET_USAGE;
+
+			efi_create_indexed_name(var_name16, sizeof(var_name16),
+						"Boot", id);
+
+			label = efi_convert_string(argv[2]);
+			if (!label)
+				return CMD_RET_FAILURE;
+			lo.label = label;
+
+			uridp_len = sizeof(struct efi_device_path) + strlen(argv[3]) + 1;
+			fp_free = efi_alloc(uridp_len + sizeof(END));
+			uridp = (struct efi_device_path_uri *)fp_free;
+			uridp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
+			uridp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_URI;
+			uridp->dp.length = uridp_len;
+			if (!wget_validate_uri(argv[3])) {
+				printf("ERROR: invalid URI\n");
+				r = CMD_RET_FAILURE;
+				goto out;
+			}
+
+			strcpy(uridp->uri, argv[3]);
+			pos = (char *)uridp + uridp_len;
+			memcpy(pos, &END, sizeof(END));
+			fp_size += uridp_len + sizeof(END);
+			file_path = (struct efi_device_path *)uridp;
+			argc -= 3;
+			argv += 3;
+			break;
+		}
+#endif
+
 		default:
 			r = CMD_RET_USAGE;
 			goto out;
@@ -1492,6 +1539,9 @@ static char efidebug_help_text[] =
 	"  -b|-B <bootid> <label> <interface> <devnum>[:<part>] <file path>\n"
 	"  -i|-I <interface> <devnum>[:<part>] <initrd file path>\n"
 	"  (-b, -i for short form device path)\n"
+#if (IS_ENABLED(CONFIG_BLKMAP) && IS_ENABLED(CONFIG_CMD_WGET) && IS_ENABLED(CONFIG_CMD_DNS))
+	"  -u <bootid> <label> <uri>\n"
+#endif
 	"  -s '<optional data>'\n"
 	"efidebug boot rm <bootid#1> [<bootid#2> [<bootid#3> [...]]]\n"
 	"  - delete UEFI BootXXXX variables\n"
diff --git a/include/net.h b/include/net.h
index b9cba5244a..4b42672070 100644
--- a/include/net.h
+++ b/include/net.h
@@ -927,5 +927,6 @@ static inline void eth_set_enable_bootdevs(bool enable) {}
 #endif
 
 int wget_with_dns(ulong dst_addr, char *uri);
+bool wget_validate_uri(char *uri);
 
 #endif /* __NET_H__ */
diff --git a/net/wget.c b/net/wget.c
index bdf940a315..0bc0bf33bb 100644
--- a/net/wget.c
+++ b/net/wget.c
@@ -558,3 +558,75 @@ out:
 	return ret;
 }
 #endif
+
+/**
+ * wget_validate_uri() - validate the uri for wget
+ *
+ * @uri:	uri string
+ * Return:	true on success, false on failure
+ */
+bool wget_validate_uri(char *uri)
+{
+	char c;
+	bool ret = true;
+	char *str_copy, *s, *authority;
+
+	/* TODO: strict uri conformance check */
+
+	/*
+	 * Uri is expected to be correctly percent encoded.
+	 * This is the minimum check, control codes(0x1-0x19, 0x7F, except '\0')
+	 * and space character(0x20) are not allowed.
+	 */
+	for (c = 0x1; c < 0x21; c++) {
+		if (strchr(uri, c)) {
+			printf("invalid character is used\n");
+			return false;
+		}
+	}
+	if (strchr(uri, 0x7f)) {
+		printf("invalid character is used\n");
+		return false;
+	}
+
+	/*
+	 * This follows the current U-Boot wget implementation.
+	 * scheme: only "http:" is supported
+	 * authority:
+	 *   - user information: not supported
+	 *   - host: supported
+	 *   - port: not supported(always use the default port)
+	 */
+	if (strncmp(uri, "http://", 7)) {
+		printf("only http:// is supported\n");
+		return false;
+	}
+	str_copy = strdup(uri);
+	if (!str_copy)
+		return false;
+
+	s = str_copy + strlen("http://");
+	authority = strsep(&s, "/");
+	if (!s) {
+		printf("invalid uri, no file path\n");
+		ret = false;
+		goto out;
+	}
+	s = strchr(authority, '@');
+	if (s) {
+		printf("user information is not supported\n");
+		ret = false;
+		goto out;
+	}
+	s = strchr(authority, ':');
+	if (s) {
+		printf("user defined port is not supported\n");
+		ret = false;
+		goto out;
+	}
+
+out:
+	free(str_copy);
+
+	return ret;
+}
-- 
2.34.1