import libfetch-2.38 from NetBSD

ftp://ftp.fu-berlin.de/unix/NetBSD/packages/current-src/pkgsrc/net/libfetch/files

libfetch comes (at least) in netbsd and freebsd flavors which
differing functionality. Alpine and Arch package netbsd one,
but it's not widely packaged across other distributions.

We need NetBSD version as it does not use funopen(3) which is not
supported in musl, and supports connection pooling.

FreeBSD seems to be the orignal and better maintained version
with support for SSL CAs, client certificate authentication,
proxy authentication, and improved http redirect handling.

So this imports NetBSD version, and future commits will pick up
the needed improvements from FreeBSD tree.

Incidentally, this also fixes #7857 and likes for good.

1 files changed, 187 insertions, 0 deletions

diff --git a/libfetch/fetch.h b/libfetch/fetch.h
new file mode 100644
index 0000000..3075486
--- /dev/null
+++ b/libfetch/fetch.h
@@ -0,0 +1,187 @@
+/*	$NetBSD: fetch.h,v 1.16 2010/01/22 13:21:09 joerg Exp $	*/
+/*-
+ * Copyright (c) 1998-2004 Dag-Erling Coïdan Smørgrav
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer
+ *    in this position and unchanged.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD: fetch.h,v 1.26 2004/09/21 18:35:20 des Exp $
+ */
+
+#ifndef _FETCH_H_INCLUDED
+#define _FETCH_H_INCLUDED
+
+#include <sys/types.h>
+#include <limits.h>
+#include <stdio.h>
+
+#define _LIBFETCH_VER "libfetch/2.0"
+
+#define URL_HOSTLEN 255
+#define URL_SCHEMELEN 16
+#define URL_USERLEN 256
+#define URL_PWDLEN 256
+
+typedef struct fetchIO fetchIO;
+
+struct url {
+	char		 scheme[URL_SCHEMELEN + 1];
+	char		 user[URL_USERLEN + 1];
+	char		 pwd[URL_PWDLEN + 1];
+	char		 host[URL_HOSTLEN + 1];
+	int		 port;
+	char		*doc;
+	off_t		 offset;
+	size_t		 length;
+	time_t		 last_modified;
+};
+
+struct url_stat {
+	off_t		 size;
+	time_t		 atime;
+	time_t		 mtime;
+};
+
+struct url_list {
+	size_t		 length;
+	size_t		 alloc_size;
+	struct url	*urls;
+};
+
+/* Recognized schemes */
+#define SCHEME_FTP	"ftp"
+#define SCHEME_HTTP	"http"
+#define SCHEME_HTTPS	"https"
+#define SCHEME_FILE	"file"
+
+/* Error codes */
+#define	FETCH_ABORT	 1
+#define	FETCH_AUTH	 2
+#define	FETCH_DOWN	 3
+#define	FETCH_EXISTS	 4
+#define	FETCH_FULL	 5
+#define	FETCH_INFO	 6
+#define	FETCH_MEMORY	 7
+#define	FETCH_MOVED	 8
+#define	FETCH_NETWORK	 9
+#define	FETCH_OK	10
+#define	FETCH_PROTO	11
+#define	FETCH_RESOLV	12
+#define	FETCH_SERVER	13
+#define	FETCH_TEMP	14
+#define	FETCH_TIMEOUT	15
+#define	FETCH_UNAVAIL	16
+#define	FETCH_UNKNOWN	17
+#define	FETCH_URL	18
+#define	FETCH_VERBOSE	19
+#define	FETCH_UNCHANGED	20
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+void		fetchIO_close(fetchIO *);
+ssize_t		fetchIO_read(fetchIO *, void *, size_t);
+ssize_t		fetchIO_write(fetchIO *, const void *, size_t);
+
+/* fetchIO-specific functions */
+fetchIO		*fetchXGetFile(struct url *, struct url_stat *, const char *);
+fetchIO		*fetchGetFile(struct url *, const char *);
+fetchIO		*fetchPutFile(struct url *, const char *);
+int		 fetchStatFile(struct url *, struct url_stat *, const char *);
+int		 fetchListFile(struct url_list *, struct url *, const char *,
+		    const char *);
+
+/* HTTP-specific functions */
+fetchIO		*fetchXGetHTTP(struct url *, struct url_stat *, const char *);
+fetchIO		*fetchGetHTTP(struct url *, const char *);
+fetchIO		*fetchPutHTTP(struct url *, const char *);
+int		 fetchStatHTTP(struct url *, struct url_stat *, const char *);
+int		 fetchListHTTP(struct url_list *, struct url *, const char *,
+		    const char *);
+
+/* FTP-specific functions */
+fetchIO		*fetchXGetFTP(struct url *, struct url_stat *, const char *);
+fetchIO		*fetchGetFTP(struct url *, const char *);
+fetchIO		*fetchPutFTP(struct url *, const char *);
+int		 fetchStatFTP(struct url *, struct url_stat *, const char *);
+int		 fetchListFTP(struct url_list *, struct url *, const char *,
+		    const char *);
+
+/* Generic functions */
+fetchIO		*fetchXGetURL(const char *, struct url_stat *, const char *);
+fetchIO		*fetchGetURL(const char *, const char *);
+fetchIO		*fetchPutURL(const char *, const char *);
+int		 fetchStatURL(const char *, struct url_stat *, const char *);
+int		 fetchListURL(struct url_list *, const char *, const char *,
+		    const char *);
+fetchIO		*fetchXGet(struct url *, struct url_stat *, const char *);
+fetchIO		*fetchGet(struct url *, const char *);
+fetchIO		*fetchPut(struct url *, const char *);
+int		 fetchStat(struct url *, struct url_stat *, const char *);
+int		 fetchList(struct url_list *, struct url *, const char *,
+		    const char *);
+
+/* URL parsing */
+struct url	*fetchMakeURL(const char *, const char *, int,
+		     const char *, const char *, const char *);
+struct url	*fetchParseURL(const char *);
+struct url	*fetchCopyURL(const struct url *);
+char		*fetchStringifyURL(const struct url *);
+void		 fetchFreeURL(struct url *);
+
+/* URL listening */
+void		 fetchInitURLList(struct url_list *);
+int		 fetchAppendURLList(struct url_list *, const struct url_list *);
+void		 fetchFreeURLList(struct url_list *);
+char		*fetchUnquotePath(struct url *);
+char		*fetchUnquoteFilename(struct url *);
+
+/* Connection caching */
+void		 fetchConnectionCacheInit(int, int);
+void		 fetchConnectionCacheClose(void);
+
+/* Authentication */
+typedef int (*auth_t)(struct url *);
+extern auth_t		 fetchAuthMethod;
+
+/* Last error code */
+extern int		 fetchLastErrCode;
+#define MAXERRSTRING 256
+extern char		 fetchLastErrString[MAXERRSTRING];
+
+/* I/O timeout */
+extern int		 fetchTimeout;
+
+/* Restart interrupted syscalls */
+extern volatile int	 fetchRestartCalls;
+
+/* Extra verbosity */
+extern int		 fetchDebug;
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif