[PATCH v6 8/9] 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  |  8 ++++++
 net/wget.c     | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 129 insertions(+)

diff --git a/cmd/efidebug.c b/cmd/efidebug.c
index 0be3af3e76..5f392d2ffd 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_EFI_HTTP_BOOT))
+		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_EFI_HTTP_BOOT))
+	"  -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 57889d8b7a..c748974573 100644
--- a/include/net.h
+++ b/include/net.h
@@ -935,4 +935,12 @@ static inline void eth_set_enable_bootdevs(bool enable) {}
  */
 int wget_with_dns(ulong dst_addr, char *uri);
 
+/**
+ * wget_validate_uri() - varidate the uri
+ *
+ * @uri:	uri string of target file of wget
+ * Return:	true if uri is valid, false if uri is invalid
+ */
+bool wget_validate_uri(char *uri);
+
 #endif /* __NET_H__ */
diff --git a/net/wget.c b/net/wget.c
index 2087146b37..6ae2237a0a 100644
--- a/net/wget.c
+++ b/net/wget.c
@@ -566,3 +566,74 @@ out:
 	return ret;
 }
 #endif
+
+/**
+ * wget_validate_uri() - validate the uri for wget
+ *
+ * @uri:	uri string
+ *
+ * This function 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)
+ *
+ * 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.
+ *
+ * TODO: stricter uri conformance check
+ *
+ * Return:	true on success, false on failure
+ */
+bool wget_validate_uri(char *uri)
+{
+	char c;
+	bool ret = true;
+	char *str_copy, *s, *authority;
+
+	for (c = 0x1; c < 0x21; c++) {
+		if (strchr(uri, c)) {
+			log_err("invalid character is used\n");
+			return false;
+		}
+	}
+	if (strchr(uri, 0x7f)) {
+		log_err("invalid character is used\n");
+		return false;
+	}
+
+	if (strncmp(uri, "http://", 7)) {
+		log_err("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) {
+		log_err("invalid uri, no file path\n");
+		ret = false;
+		goto out;
+	}
+	s = strchr(authority, '@');
+	if (s) {
+		log_err("user information is not supported\n");
+		ret = false;
+		goto out;
+	}
+	s = strchr(authority, ':');
+	if (s) {
+		log_err("user defined port is not supported\n");
+		ret = false;
+		goto out;
+	}
+
+out:
+	free(str_copy);
+
+	return ret;
+}
-- 
2.34.1