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authorSergey Markelov <sergey@solidstatenetworks.com>2021-09-27 08:31:52 +0200
committerDaniel Stenberg <daniel@haxx.se>2021-09-27 08:32:41 +0200
commit4b997626b1182a8a7d974f2957b3ad8eaebd8817 (patch)
tree0e890625cd24507956daa73feed58eb1ed40e230 /lib/urlapi.c
parent3363eeb26298b9d30fc5ec29101e5dd205d04db9 (diff)
downloadcurl-4b997626b1182a8a7d974f2957b3ad8eaebd8817.tar.gz
urlapi: support UNC paths in file: URLs on Windows
- file://host.name/path/file.txt is a valid UNC path \\host.name\path\files.txt to a non-local file transformed into URI (RFC 8089 Appendix E.3) - UNC paths on other OSs must be smb: URLs Closes #7366
Diffstat (limited to 'lib/urlapi.c')
-rw-r--r--lib/urlapi.c40
1 files changed, 34 insertions, 6 deletions
diff --git a/lib/urlapi.c b/lib/urlapi.c
index 7f03862cf..59123ed57 100644
--- a/lib/urlapi.c
+++ b/lib/urlapi.c
@@ -760,6 +760,7 @@ static CURLUcode seturl(const char *url, CURLU *u, unsigned int flags)
{
char *path;
bool path_alloced = FALSE;
+ bool uncpath = FALSE;
char *hostname;
char *query = NULL;
char *fragment = NULL;
@@ -798,7 +799,6 @@ static CURLUcode seturl(const char *url, CURLU *u, unsigned int flags)
/* path has been allocated large enough to hold this */
strcpy(path, &url[5]);
- hostname = NULL; /* no host for file: URLs */
u->scheme = strdup("file");
if(!u->scheme)
return CURLUE_OUT_OF_MEMORY;
@@ -820,10 +820,13 @@ static CURLUcode seturl(const char *url, CURLU *u, unsigned int flags)
*
* o the hostname matches "localhost" (case-insensitively), or
*
- * o the hostname is a FQDN that resolves to this machine.
+ * o the hostname is a FQDN that resolves to this machine, or
+ *
+ * o it is an UNC String transformed to an URI (Windows only, RFC 8089
+ * Appendix E.3).
*
* For brevity, we only consider URLs with empty, "localhost", or
- * "127.0.0.1" hostnames as local.
+ * "127.0.0.1" hostnames as local, otherwise as an UNC String.
*
* Additionally, there is an exception for URLs with a Windows drive
* letter in the authority (which was accidentally omitted from RFC 8089
@@ -832,18 +835,43 @@ static CURLUcode seturl(const char *url, CURLU *u, unsigned int flags)
if(ptr[0] != '/' && !STARTS_WITH_URL_DRIVE_PREFIX(ptr)) {
/* the URL includes a host name, it must match "localhost" or
"127.0.0.1" to be valid */
- if(!checkprefix("localhost/", ptr) &&
- !checkprefix("127.0.0.1/", ptr)) {
+ if(checkprefix("localhost/", ptr) ||
+ checkprefix("127.0.0.1/", ptr)) {
+ ptr += 9; /* now points to the slash after the host */
+ }
+ else {
+#if defined(WIN32)
+ size_t len;
+
+ /* the host name, NetBIOS computer name, can not contain disallowed
+ chars, and the delimiting slash character must be appended to the
+ host name */
+ path = strpbrk(ptr, "/\\:*?\"<>|");
+ if(!path || *path != '/')
+ return CURLUE_MALFORMED_INPUT;
+
+ len = path - ptr;
+ if(len) {
+ memcpy(hostname, ptr, len);
+ hostname[len] = 0;
+ uncpath = TRUE;
+ }
+
+ ptr -= 2; /* now points to the // before the host in UNC */
+#else
/* Invalid file://hostname/, expected localhost or 127.0.0.1 or
none */
return CURLUE_MALFORMED_INPUT;
+#endif
}
- ptr += 9; /* now points to the slash after the host */
}
path = ptr;
}
+ if(!uncpath)
+ hostname = NULL; /* no host for file: URLs by default */
+
#if !defined(MSDOS) && !defined(WIN32) && !defined(__CYGWIN__)
/* Don't allow Windows drive letters when not in Windows.
* This catches both "file:/c:" and "file:c:" */