From 2f84b2e097ad9f6f7f06013f749251743eb32c2e Mon Sep 17 00:00:00 2001 From: Peter Jones Date: Tue, 14 Jun 2016 16:18:44 -0400 Subject: [PATCH] Add a url parser. This patch adds a url parser that can parse http, https, tftp, and tftps urls, and is easily extensible to handle more types. It's a little ugly in terms of the arguments it takes. Signed-off-by: Peter Jones --- grub-core/Makefile.core.def | 1 + grub-core/kern/misc.c | 13 + grub-core/net/url.c | 861 ++++++++++++++++++++++++++++++++++++++++++++ include/grub/misc.h | 45 +++ include/grub/net/url.h | 28 ++ 5 files changed, 948 insertions(+) create mode 100644 grub-core/net/url.c create mode 100644 include/grub/net/url.h diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def index 5ae70204cd2..4857a1e5f61 100644 --- a/grub-core/Makefile.core.def +++ b/grub-core/Makefile.core.def @@ -2199,6 +2199,7 @@ module = { common = net/ethernet.c; common = net/arp.c; common = net/netbuff.c; + common = net/url.c; }; module = { diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c index 8344526be7f..f1fab700048 100644 --- a/grub-core/kern/misc.c +++ b/grub-core/kern/misc.c @@ -296,6 +296,19 @@ grub_strrchr (const char *s, int c) return p; } +char * +grub_strchrnul (const char *s, int c) +{ + do + { + if (*s == c) + break; + } + while (*s++); + + return (char *) s; +} + int grub_strword (const char *haystack, const char *needle) { diff --git a/grub-core/net/url.c b/grub-core/net/url.c new file mode 100644 index 00000000000..146858284cd --- /dev/null +++ b/grub-core/net/url.c @@ -0,0 +1,861 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2016 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#ifdef URL_TEST + +#define _GNU_SOURCE 1 + +#include +#include +#include +#include +#include +#include +#include + +#define N_(x) x + +#define grub_malloc(x) malloc(x) +#define grub_free(x) ({if (x) free(x);}) +#define grub_error(a, fmt, args...) printf(fmt "\n", ## args) +#define grub_dprintf(a, fmt, args...) printf(a ": " fmt, ## args) +#define grub_strlen(x) strlen(x) +#define grub_strdup(x) strdup(x) +#define grub_strstr(x,y) strstr(x,y) +#define grub_memcpy(x,y,z) memcpy(x,y,z) +#define grub_strcmp(x,y) strcmp(x,y) +#define grub_strncmp(x,y,z) strncmp(x,y,z) +#define grub_strcasecmp(x,y) strcasecmp(x,y) +#define grub_strchrnul(x,y) strchrnul(x,y) +#define grub_strchr(x,y) strchr(x,y) +#define grub_strndup(x,y) strndup(x,y) +#define grub_strtoul(x,y,z) strtoul(x,y,z) +#define grub_memmove(x,y,z) memmove(x,y,z) +#define grub_size_t size_t +#define grub_errno errno + +#else +#include +#include +#include +#include +#endif + +static char * +translate_slashes(char *str) +{ + int i, j; + if (str == NULL) + return str; + + for (i = 0, j = 0; str[i] != '\0'; i++, j++) + { + if (str[i] == '\\') + { + str[j] = '/'; + if (str[i+1] == '\\') + i++; + } + } + + return str; +} + +static inline int +hex2int (char c) +{ + if (c >= '0' && c <= '9') + return c - '0'; + c |= 0x20; + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + return -1; +} + +static int +url_unescape (char *buf, grub_size_t len) +{ + int c, rc; + unsigned int i; + + + if (len < 3) + { + for (i = 0; i < len; i++) + if (buf[i] == '%') + return -1; + return 0; + } + + for (i = 0; len > 2 && i < len - 2; i++) + { + if (buf[i] == '%') + { + unsigned int j; + for (j = i+1; j < i+3; j++) + { + if (!(buf[j] >= '0' && buf[j] <= '9') && + !(buf[j] >= 'a' && buf[j] <= 'f') && + !(buf[j] >= 'A' && buf[j] <= 'F')) + return -1; + } + i += 2; + } + } + if (i == len - 2) + { + if (buf[i+1] == '%' || buf[i+2] == '%') + return -1; + } + for (i = 0; i < len - 2; i++) + { + if (buf[i] == '%') + { + rc = hex2int (buf[i+1]); + if (rc < 0) + return -1; + c = (rc & 0xf) << 4; + rc = hex2int (buf[i+2]); + if (rc < 0) + return -1; + c |= (rc & 0xf); + + buf[i] = c; + grub_memmove (buf+i+1, buf+i+3, len-(i+2)); + len -= 2; + } + } + return 0; +} + +static int +extract_http_url_info (char *url, int ssl, + char **userinfo, char **host, int *port, + char **file) +{ + char *colon, *slash, *query, *at = NULL, *separator, *auth_end; + + char *userinfo_off = NULL; + char *userinfo_end; + char *host_off = NULL; + char *host_end; + char *port_off = NULL; + char *port_end; + char *file_off = NULL; + + grub_size_t l; + int c; + + if (!url || !userinfo || !host || !port || !file) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid argument"); + + *userinfo = *host = *file = NULL; + *port = -1; + + userinfo_off = url; + + slash = grub_strchrnul (userinfo_off, '/'); + query = grub_strchrnul (userinfo_off, '?'); + auth_end = slash < query ? slash : query; + /* auth_end here is one /past/ the last character in the auth section, i.e. + * it's the : or / or NUL */ + + separator = grub_strchrnul (userinfo_off, '@'); + if (separator > auth_end) + { + host_off = userinfo_off; + userinfo_off = NULL; + userinfo_end = NULL; + } + else + { + at = separator; + *separator = '\0'; + userinfo_end = separator; + host_off = separator + 1; + } + + if (*host_off == '[') + { + separator = grub_strchrnul (host_off, ']'); + if (separator >= auth_end) + goto fail; + + separator += 1; + host_end = separator; + } + else + { + host_end = separator = colon = grub_strchrnul (host_off, ':'); + + if (colon > auth_end) + { + separator = NULL; + host_end = auth_end; + } + } + + if (separator && separator < auth_end) + { + if (*separator == ':') + { + port_off = separator + 1; + port_end = auth_end; + + if (auth_end - port_end > 0) + goto fail; + if (port_end - port_off < 1) + goto fail; + } + else + goto fail; + } + + file_off = auth_end; + if (port_off) + { + unsigned long portul; + + separator = NULL; + c = *port_end; + *port_end = '\0'; + + portul = grub_strtoul (port_off, &separator, 10); + *port_end = c; +#ifdef URL_TEST + if (portul == ULONG_MAX && errno == ERANGE) + goto fail; +#else + if (grub_errno == GRUB_ERR_OUT_OF_RANGE) + goto fail; +#endif + if (portul & ~0xfffful) + goto fail; + if (separator != port_end) + goto fail; + + *port = portul & 0xfffful; + } + else if (ssl) + *port = 443; + else + *port = 80; + + if (userinfo_off && *userinfo_off) + { + l = userinfo_end - userinfo_off + 1; + + *userinfo = grub_strndup (userinfo_off, l); + if (!*userinfo) + goto fail; + (*userinfo)[l-1]= '\0'; + } + + l = host_end - host_off; + + if (host_end == NULL) + goto fail; + else + c = *host_end; + + *host_end = '\0'; + *host = grub_strndup (host_off, l); + *host_end = c; + if (!*host) + goto fail; + (*host)[l] = '\0'; + + *file = grub_strdup (file_off); + if (!*file) + goto fail; + + if (at) + *at = '@'; + return 0; +fail: + if (at) + *at = '@'; + grub_free (*userinfo); + grub_free (*host); + grub_free (*file); + + return -1; +} + +static int +extract_tftp_url_info (char *url, int ssl, char **host, char **file, int *port) +{ + char *slash, *semi; + + char *host_off = url; + char *host_end; + char *file_off; + + int c; + + if (!url || !host || !file || !port) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid argument"); + + if (ssl) + *port = 3713; + else + *port = 69; + + slash = grub_strchr (url, '/'); + if (!slash) + return -1; + + host_end = file_off = slash; + + semi = grub_strchrnul (slash, ';'); + if (!grub_strncmp (semi, ";mode=", 6) && grub_strcmp (semi+6, "octet")) + { + grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, + N_("TFTP mode `%s' is not implemented."), semi+6); + return -1; + } + + /* + * Maybe somebody added a new method, I dunno. Anyway, semi is a reserved + * character, so if it's there, it's the start of the mode block or it's + * invalid. So set it to \0 unconditionally, not just for ;mode=octet + */ + *semi = '\0'; + + c = *host_end; + *host_end = '\0'; + *host = grub_strdup (host_off); + *host_end = c; + + *file = grub_strdup (file_off); + + if (!*file || !*host) + { + grub_free (*file); + grub_free (*host); + return -1; + } + + return 0; +} + +int +extract_url_info (const char *urlbuf, grub_size_t buflen, + char **scheme, char **userinfo, + char **host, int *port, char **file) +{ + char *url; + char *colon; + + char *scheme_off; + char *specific_off; + + int rc; + int c; + + int https; + + if (!urlbuf || !buflen || !scheme || !userinfo || !host || !port || !file) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid argument"); + + *scheme = *userinfo = *host = *file = NULL; + *port = -1; + + /* make sure we have our own coherent grub_string. */ + url = grub_malloc (buflen + 1); + if (!url) + return -1; + + grub_memcpy (url, urlbuf, buflen); + url[buflen] = '\0'; + + grub_dprintf ("net", "dhcpv6 boot-file-url: `%s'\n", url); + + /* get rid of any backslashes */ + url = translate_slashes (url); + + /* find the constituent parts */ + colon = grub_strstr (url, "://"); + if (!colon) + goto fail; + + scheme_off = url; + c = *colon; + *colon = '\0'; + specific_off = colon + 3; + + https = !grub_strcasecmp (scheme_off, "https"); + + rc = 0; + if (!grub_strcasecmp (scheme_off, "tftp")) + { + rc = extract_tftp_url_info (specific_off, 0, host, file, port); + } +#ifdef URL_TEST + else if (!grub_strcasecmp (scheme_off, "http") || https) +#else + else if (!grub_strcasecmp (scheme_off, "http")) +#endif + { + rc = extract_http_url_info (specific_off, + https, userinfo, host, port, file); + } +#ifdef URL_TEST + else if (!grub_strcasecmp (scheme_off, "iscsi")) + { + grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, + N_("Unimplemented URL scheme `%s'"), scheme_off); + *colon = c; + goto fail; + } + else if (!grub_strcasecmp (scheme_off, "tftps")) + { + rc = extract_tftp_url_info (specific_off, 1, host, file, port); + } +#endif + else + { + grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, + N_("Unimplemented URL scheme `%s'"), scheme_off); + *colon = c; + goto fail; + } + + if (rc < 0) + { + *colon = c; + goto fail; + } + + *scheme = grub_strdup (scheme_off); + *colon = c; + if (!*scheme) + goto fail; + + if (*userinfo) + { + rc = url_unescape (*userinfo, grub_strlen (*userinfo)); + if (rc < 0) + goto fail; + } + + if (*host) + { + rc = url_unescape (*host, grub_strlen (*host)); + if (rc < 0) + goto fail; + } + + if (*file) + { + rc = url_unescape (*file, grub_strlen (*file)); + if (rc < 0) + goto fail; + } + + grub_free (url); + return 0; +fail: + grub_free (*scheme); + grub_free (*userinfo); + grub_free (*host); + grub_free (*file); + + if (!grub_errno) + grub_error (GRUB_ERR_NET_BAD_ADDRESS, N_("Invalid boot-file-url `%s'"), + url); + grub_free (url); + return -1; +} + +#ifdef URL_TEST + +struct test { + char *url; + int rc; + char *scheme; + char *userinfo; + char *host; + int port; + char *file; +} tests[] = { + {.url = "http://foo.example.com/", + .rc = 0, + .scheme = "http", + .host = "foo.example.com", + .port = 80, + .file = "/", + }, + {.url = "http://foo.example.com/?foobar", + .rc = 0, + .scheme = "http", + .host = "foo.example.com", + .port = 80, + .file = "/?foobar", + }, + {.url = "http://[foo.example.com/", + .rc = -1, + }, + {.url = "http://[foo.example.com/?foobar", + .rc = -1, + }, + {.url = "http://foo.example.com:/", + .rc = -1, + }, + {.url = "http://foo.example.com:81/", + .rc = 0, + .scheme = "http", + .host = "foo.example.com", + .port = 81, + .file = "/", + }, + {.url = "http://foo.example.com:81/?foobar", + .rc = 0, + .scheme = "http", + .host = "foo.example.com", + .port = 81, + .file = "/?foobar", + }, + {.url = "http://[1234::1]/", + .rc = 0, + .scheme = "http", + .host = "[1234::1]", + .port = 80, + .file = "/", + }, + {.url = "http://[1234::1]/?foobar", + .rc = 0, + .scheme = "http", + .host = "[1234::1]", + .port = 80, + .file = "/?foobar", + }, + {.url = "http://[1234::1]:81/", + .rc = 0, + .scheme = "http", + .host = "[1234::1]", + .port = 81, + .file = "/", + }, + {.url = "http://[1234::1]:81/?foobar", + .rc = 0, + .scheme = "http", + .host = "[1234::1]", + .port = 81, + .file = "/?foobar", + }, + {.url = "http://foo@foo.example.com/", + .rc = 0, + .scheme = "http", + .userinfo = "foo", + .host = "foo.example.com", + .port = 80, + .file = "/", + }, + {.url = "http://foo@foo.example.com/?foobar", + .rc = 0, + .scheme = "http", + .userinfo = "foo", + .host = "foo.example.com", + .port = 80, + .file = "/?foobar", + }, + {.url = "http://foo@[foo.example.com/", + .rc = -1, + }, + {.url = "http://foo@[foo.example.com/?foobar", + .rc = -1, + }, + {.url = "http://foo@foo.example.com:81/", + .rc = 0, + .scheme = "http", + .userinfo = "foo", + .host = "foo.example.com", + .port = 81, + .file = "/", + }, + {.url = "http://foo@foo.example.com:81/?foobar", + .rc = 0, + .scheme = "http", + .userinfo = "foo", + .host = "foo.example.com", + .port = 81, + .file = "/?foobar", + }, + {.url = "http://foo@[1234::1]/", + .rc = 0, + .scheme = "http", + .userinfo = "foo", + .host = "[1234::1]", + .port = 80, + .file = "/", + }, + {.url = "http://foo@[1234::1]/?foobar", + .rc = 0, + .scheme = "http", + .userinfo = "foo", + .host = "[1234::1]", + .port = 80, + .file = "/?foobar", + }, + {.url = "http://foo@[1234::1]:81/", + .rc = 0, + .scheme = "http", + .userinfo = "foo", + .host = "[1234::1]", + .port = 81, + .file = "/", + }, + {.url = "http://foo@[1234::1]:81/?foobar", + .rc = 0, + .scheme = "http", + .userinfo = "foo", + .host = "[1234::1]", + .port = 81, + .file = "/?foobar", + }, + {.url = "https://foo.example.com/", + .rc = 0, + .scheme = "https", + .host = "foo.example.com", + .port = 443, + .file = "/", + }, + {.url = "https://foo.example.com/?foobar", + .rc = 0, + .scheme = "https", + .host = "foo.example.com", + .port = 443, + .file = "/?foobar", + }, + {.url = "https://[foo.example.com/", + .rc = -1, + }, + {.url = "https://[foo.example.com/?foobar", + .rc = -1, + }, + {.url = "https://foo.example.com:81/", + .rc = 0, + .scheme = "https", + .host = "foo.example.com", + .port = 81, + .file = "/", + }, + {.url = "https://foo.example.com:81/?foobar", + .rc = 0, + .scheme = "https", + .host = "foo.example.com", + .port = 81, + .file = "/?foobar", + }, + {.url = "https://[1234::1]/", + .rc = 0, + .scheme = "https", + .host = "[1234::1]", + .port = 443, + .file = "/", + }, + {.url = "https://[1234::1]/?foobar", + .rc = 0, + .scheme = "https", + .host = "[1234::1]", + .port = 443, + .file = "/?foobar", + }, + {.url = "https://[1234::1]:81/", + .rc = 0, + .scheme = "https", + .host = "[1234::1]", + .port = 81, + .file = "/", + }, + {.url = "https://[1234::1]:81/?foobar", + .rc = 0, + .scheme = "https", + .host = "[1234::1]", + .port = 81, + .file = "/?foobar", + }, + {.url = "https://foo@foo.example.com/", + .rc = 0, + .scheme = "https", + .userinfo = "foo", + .host = "foo.example.com", + .port = 443, + .file = "/", + }, + {.url = "https://foo@foo.example.com/?foobar", + .rc = 0, + .scheme = "https", + .userinfo = "foo", + .host = "foo.example.com", + .port = 443, + .file = "/?foobar", + }, + {.url = "https://foo@[foo.example.com/", + .rc = -1, + }, + {.url = "https://f%6fo@[foo.example.com/?fooba%72", + .rc = -1, + }, + {.url = "https://foo@foo.example.com:81/", + .rc = 0, + .scheme = "https", + .userinfo = "foo", + .host = "foo.example.com", + .port = 81, + .file = "/", + }, + {.url = "https://foo@foo.example.com:81/?foobar", + .rc = 0, + .scheme = "https", + .userinfo = "foo", + .host = "foo.example.com", + .port = 81, + .file = "/?foobar", + }, + {.url = "https://foo@[1234::1]/", + .rc = 0, + .scheme = "https", + .userinfo = "foo", + .host = "[1234::1]", + .port = 443, + .file = "/", + }, + {.url = "https://foo@[1234::1]/?foobar", + .rc = 0, + .scheme = "https", + .userinfo = "foo", + .host = "[1234::1]", + .port = 443, + .file = "/?foobar", + }, + {.url = "https://f%6fo@[12%334::1]:81/", + .rc = 0, + .scheme = "https", + .userinfo = "foo", + .host = "[1234::1]", + .port = 81, + .file = "/", + }, + {.url = "https://foo@[1234::1]:81/?foobar", + .rc = 0, + .scheme = "https", + .userinfo = "foo", + .host = "[1234::1]", + .port = 81, + .file = "/?foobar", + }, + {.url = "tftp://foo.e%78ample.com/foo/bar/b%61%7a", + .rc = 0, + .scheme = "tftp", + .host = "foo.example.com", + .port = 69, + .file = "/foo/bar/baz", + }, + {.url = "tftp://foo.example.com/foo/bar/baz", + .rc = 0, + .scheme = "tftp", + .host = "foo.example.com", + .port = 69, + .file = "/foo/bar/baz", + }, + {.url = "tftps://foo.example.com/foo/bar/baz", + .rc = 0, + .scheme = "tftps", + .host = "foo.example.com", + .port = 3713, + .file = "/foo/bar/baz", + }, + {.url = "tftps://foo.example.com/foo/bar/baz;mode=netascii", + .rc = -1, + }, + {.url = "tftps://foo.example.com/foo/bar/baz;mode=octet", + .rc = 0, + .scheme = "tftps", + .host = "foo.example.com", + .port = 3713, + .file = "/foo/bar/baz", + }, + {.url = "tftps://foo.example.com/foo/bar/baz;mode=invalid", + .rc = -1, + }, + {.url = "", + }, +}; + +static int +string_test (char *name, char *a, char *b) +{ + if ((a && !b) || (!a && b)) + { + printf("expected %s \"%s\", got \"%s\"\n", name, a, b); + return -1; + } + if (a && b && strcmp(a, b)) + { + printf("expected %s \"%s\", got \"%s\"\n", name, a, b); + return -1; + } + return 0; +} + +int +main(void) +{ + unsigned int i; + int rc; + + for (i = 0; tests[i].url[0] != '\0'; i++) + { + char *scheme, *userinfo, *host, *file; + int port; + + printf("======= url: \"%s\"\n", tests[i].url); + rc = extract_url_info(tests[i].url, strlen(tests[i].url) + 1, + &scheme, &userinfo, &host, &port, &file); + if (tests[i].rc != rc) + { + printf(" extract_url_info(...) = %d\n", rc); + exit(1); + } + else if (rc >= 0) + { + if (string_test("scheme", tests[i].scheme, scheme) < 0) + exit(1); + if (string_test("userinfo", tests[i].userinfo, userinfo) < 0) + exit(1); + if (string_test("host", tests[i].host, host) < 0) + exit(1); + if (port != tests[i].port) + { + printf(" bad port \"%d\" should have been \"%d\"\n", + port, tests[i].port); + exit(1); + } + if (string_test("file", tests[i].file, file) < 0) + exit(1); + } + free(scheme); + free(userinfo); + free(host); + free(file); + } + printf("everything worked?!?\n"); +} +#endif diff --git a/include/grub/misc.h b/include/grub/misc.h index 06208143779..4737da1eaa9 100644 --- a/include/grub/misc.h +++ b/include/grub/misc.h @@ -85,6 +85,7 @@ int EXPORT_FUNC(grub_strncmp) (const char *s1, const char *s2, grub_size_t n); char *EXPORT_FUNC(grub_strchr) (const char *s, int c); char *EXPORT_FUNC(grub_strrchr) (const char *s, int c); +char *EXPORT_FUNC(grub_strchrnul) (const char *s, int c); int EXPORT_FUNC(grub_strword) (const char *s, const char *w); /* Copied from gnulib. @@ -207,6 +208,50 @@ grub_toupper (int c) return c; } +static inline char * +grub_strcasestr (const char *haystack, const char *needle) +{ + /* Be careful not to look at the entire extent of haystack or needle + until needed. This is useful because of these two cases: + - haystack may be very long, and a match of needle found early, + - needle may be very long, and not even a short initial segment of + needle may be found in haystack. */ + if (*needle != '\0') + { + /* Speed up the following searches of needle by caching its first + character. */ + char b = *needle++; + + for (;; haystack++) + { + if (*haystack == '\0') + /* No match. */ + return 0; + if (grub_tolower(*haystack) == grub_tolower(b)) + /* The first character matches. */ + { + const char *rhaystack = haystack + 1; + const char *rneedle = needle; + + for (;; rhaystack++, rneedle++) + { + if (*rneedle == '\0') + /* Found a match. */ + return (char *) haystack; + if (*rhaystack == '\0') + /* No match. */ + return 0; + if (grub_tolower(*rhaystack) != grub_tolower(*rneedle)) + /* Nothing in this round. */ + break; + } + } + } + } + else + return (char *) haystack; +} + static inline int grub_strcasecmp (const char *s1, const char *s2) { diff --git a/include/grub/net/url.h b/include/grub/net/url.h new file mode 100644 index 00000000000..a215fa27d0a --- /dev/null +++ b/include/grub/net/url.h @@ -0,0 +1,28 @@ +/* url.h - prototypes for url parsing functions */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2016 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#ifndef GRUB_URL_HEADER +#define GRUB_URL_HEADER 1 + +int +EXPORT_FUNC(extract_url_info) (const char *urlbuf, grub_size_t buflen, + char **scheme, char **userinfo, + char **host, int *port, char **file); + +#endif /* GRUB_URL_HEADER */