260ba0bff1
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
473 lines
11 KiB
C
473 lines
11 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1998-2004 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fetch.h"
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#include "common.h"
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auth_t fetchAuthMethod;
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int fetchLastErrCode;
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char fetchLastErrString[MAXERRSTRING];
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int fetchTimeout;
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int fetchRestartCalls = 1;
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int fetchDebug;
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/*** Local data **************************************************************/
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/*
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* Error messages for parser errors
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*/
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#define URL_MALFORMED 1
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#define URL_BAD_SCHEME 2
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#define URL_BAD_PORT 3
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static struct fetcherr url_errlist[] = {
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{ URL_MALFORMED, FETCH_URL, "Malformed URL" },
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{ URL_BAD_SCHEME, FETCH_URL, "Invalid URL scheme" },
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{ URL_BAD_PORT, FETCH_URL, "Invalid server port" },
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{ -1, FETCH_UNKNOWN, "Unknown parser error" }
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};
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/*** Public API **************************************************************/
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/*
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* Select the appropriate protocol for the URL scheme, and return a
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* read-only stream connected to the document referenced by the URL.
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* Also fill out the struct url_stat.
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*/
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FILE *
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fetchXGet(struct url *URL, struct url_stat *us, const char *flags)
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{
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if (us != NULL) {
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us->size = -1;
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us->atime = us->mtime = 0;
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}
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if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
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return (fetchXGetFile(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
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return (fetchXGetFTP(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
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return (fetchXGetHTTP(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
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return (fetchXGetHTTP(URL, us, flags));
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url_seterr(URL_BAD_SCHEME);
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return (NULL);
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}
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/*
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* Select the appropriate protocol for the URL scheme, and return a
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* read-only stream connected to the document referenced by the URL.
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*/
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FILE *
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fetchGet(struct url *URL, const char *flags)
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{
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return (fetchXGet(URL, NULL, flags));
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}
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/*
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* Select the appropriate protocol for the URL scheme, and return a
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* write-only stream connected to the document referenced by the URL.
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*/
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FILE *
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fetchPut(struct url *URL, const char *flags)
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{
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if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
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return (fetchPutFile(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
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return (fetchPutFTP(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
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return (fetchPutHTTP(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
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return (fetchPutHTTP(URL, flags));
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url_seterr(URL_BAD_SCHEME);
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return (NULL);
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}
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/*
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* Select the appropriate protocol for the URL scheme, and return the
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* size of the document referenced by the URL if it exists.
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*/
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int
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fetchStat(struct url *URL, struct url_stat *us, const char *flags)
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{
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if (us != NULL) {
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us->size = -1;
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us->atime = us->mtime = 0;
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}
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if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
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return (fetchStatFile(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
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return (fetchStatFTP(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
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return (fetchStatHTTP(URL, us, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
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return (fetchStatHTTP(URL, us, flags));
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url_seterr(URL_BAD_SCHEME);
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return (-1);
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}
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/*
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* Select the appropriate protocol for the URL scheme, and return a
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* list of files in the directory pointed to by the URL.
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*/
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struct url_ent *
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fetchList(struct url *URL, const char *flags)
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{
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if (strcasecmp(URL->scheme, SCHEME_FILE) == 0)
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return (fetchListFile(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0)
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return (fetchListFTP(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTP) == 0)
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return (fetchListHTTP(URL, flags));
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else if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0)
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return (fetchListHTTP(URL, flags));
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url_seterr(URL_BAD_SCHEME);
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return (NULL);
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}
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/*
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* Attempt to parse the given URL; if successful, call fetchXGet().
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*/
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FILE *
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fetchXGetURL(const char *URL, struct url_stat *us, const char *flags)
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{
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struct url *u;
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FILE *f;
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if ((u = fetchParseURL(URL)) == NULL)
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return (NULL);
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f = fetchXGet(u, us, flags);
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fetchFreeURL(u);
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return (f);
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}
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/*
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* Attempt to parse the given URL; if successful, call fetchGet().
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*/
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FILE *
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fetchGetURL(const char *URL, const char *flags)
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{
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return (fetchXGetURL(URL, NULL, flags));
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}
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/*
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* Attempt to parse the given URL; if successful, call fetchPut().
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*/
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FILE *
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fetchPutURL(const char *URL, const char *flags)
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{
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struct url *u;
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FILE *f;
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if ((u = fetchParseURL(URL)) == NULL)
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return (NULL);
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f = fetchPut(u, flags);
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fetchFreeURL(u);
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return (f);
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}
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/*
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* Attempt to parse the given URL; if successful, call fetchStat().
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*/
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int
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fetchStatURL(const char *URL, struct url_stat *us, const char *flags)
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{
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struct url *u;
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int s;
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if ((u = fetchParseURL(URL)) == NULL)
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return (-1);
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s = fetchStat(u, us, flags);
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fetchFreeURL(u);
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return (s);
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}
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/*
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* Attempt to parse the given URL; if successful, call fetchList().
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*/
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struct url_ent *
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fetchListURL(const char *URL, const char *flags)
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{
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struct url *u;
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struct url_ent *ue;
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if ((u = fetchParseURL(URL)) == NULL)
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return (NULL);
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ue = fetchList(u, flags);
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fetchFreeURL(u);
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return (ue);
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}
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/*
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* Make a URL
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*/
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struct url *
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fetchMakeURL(const char *scheme, const char *host, int port, const char *doc,
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const char *user, const char *pwd)
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{
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struct url *u;
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if (!scheme || (!host && !doc)) {
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url_seterr(URL_MALFORMED);
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return (NULL);
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}
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if (port < 0 || port > 65535) {
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url_seterr(URL_BAD_PORT);
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return (NULL);
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}
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/* allocate struct url */
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if ((u = calloc(1, sizeof(*u))) == NULL) {
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fetch_syserr();
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return (NULL);
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}
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if ((u->doc = strdup(doc ? doc : "/")) == NULL) {
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fetch_syserr();
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free(u);
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return (NULL);
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}
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#define seturl(x) snprintf(u->x, sizeof(u->x), "%s", x)
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seturl(scheme);
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seturl(host);
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seturl(user);
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seturl(pwd);
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#undef seturl
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u->port = port;
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u->netrcfd = -2;
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return (u);
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}
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/*
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* Return value of the given hex digit.
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*/
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static int
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fetch_hexval(char ch)
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{
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if (ch >= '0' && ch <= '9')
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return (ch - '0');
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else if (ch >= 'a' && ch <= 'f')
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return (ch - 'a' + 10);
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else if (ch >= 'A' && ch <= 'F')
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return (ch - 'A' + 10);
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return (-1);
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}
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/*
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* Decode percent-encoded URL component from src into dst, stopping at end
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* of string, or at @ or : separators. Returns a pointer to the unhandled
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* part of the input string (null terminator, @, or :). No terminator is
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* written to dst (it is the caller's responsibility).
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*/
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static const char *
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fetch_pctdecode(char *dst, const char *src, size_t dlen)
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{
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int d1, d2;
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char c;
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const char *s;
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for (s = src; *s != '\0' && *s != '@' && *s != ':'; s++) {
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if (s[0] == '%' && (d1 = fetch_hexval(s[1])) >= 0 &&
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(d2 = fetch_hexval(s[2])) >= 0 && (d1 > 0 || d2 > 0)) {
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c = d1 << 4 | d2;
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s += 2;
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} else {
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c = *s;
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}
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if (dlen-- > 0)
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*dst++ = c;
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}
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return (s);
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}
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/*
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* Split an URL into components. URL syntax is:
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* [method:/][/[user[:pwd]@]host[:port]/][document]
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* This almost, but not quite, RFC1738 URL syntax.
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*/
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struct url *
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fetchParseURL(const char *URL)
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{
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char *doc;
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const char *p, *q;
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struct url *u;
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int i;
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/* allocate struct url */
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if ((u = calloc(1, sizeof(*u))) == NULL) {
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fetch_syserr();
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return (NULL);
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}
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u->netrcfd = -2;
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/* scheme name */
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if ((p = strstr(URL, ":/"))) {
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snprintf(u->scheme, URL_SCHEMELEN+1,
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"%.*s", (int)(p - URL), URL);
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URL = ++p;
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/*
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* Only one slash: no host, leave slash as part of document
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* Two slashes: host follows, strip slashes
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*/
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if (URL[1] == '/')
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URL = (p += 2);
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} else {
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p = URL;
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}
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if (!*URL || *URL == '/' || *URL == '.' ||
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(u->scheme[0] == '\0' &&
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strchr(URL, '/') == NULL && strchr(URL, ':') == NULL))
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goto nohost;
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p = strpbrk(URL, "/@");
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if (p && *p == '@') {
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/* username */
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q = fetch_pctdecode(u->user, URL, URL_USERLEN);
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/* password */
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if (*q == ':')
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q = fetch_pctdecode(u->pwd, q + 1, URL_PWDLEN);
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p++;
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} else {
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p = URL;
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}
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/* hostname */
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if (*p == '[' && (q = strchr(p + 1, ']')) != NULL &&
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(*++q == '\0' || *q == '/' || *q == ':')) {
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if ((i = q - p) > MAXHOSTNAMELEN)
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i = MAXHOSTNAMELEN;
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strncpy(u->host, p, i);
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p = q;
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} else {
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for (i = 0; *p && (*p != '/') && (*p != ':'); p++)
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if (i < MAXHOSTNAMELEN)
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u->host[i++] = *p;
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}
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/* port */
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if (*p == ':') {
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for (q = ++p; *q && (*q != '/'); q++)
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if (isdigit((unsigned char)*q))
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u->port = u->port * 10 + (*q - '0');
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else {
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/* invalid port */
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url_seterr(URL_BAD_PORT);
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goto ouch;
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}
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p = q;
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}
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nohost:
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/* document */
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if (!*p)
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p = "/";
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if (strcasecmp(u->scheme, SCHEME_HTTP) == 0 ||
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strcasecmp(u->scheme, SCHEME_HTTPS) == 0) {
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const char hexnums[] = "0123456789abcdef";
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/* percent-escape whitespace. */
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if ((doc = malloc(strlen(p) * 3 + 1)) == NULL) {
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fetch_syserr();
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goto ouch;
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}
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u->doc = doc;
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while (*p != '\0') {
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if (!isspace((unsigned char)*p)) {
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*doc++ = *p++;
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} else {
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*doc++ = '%';
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*doc++ = hexnums[((unsigned int)*p) >> 4];
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*doc++ = hexnums[((unsigned int)*p) & 0xf];
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p++;
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}
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}
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*doc = '\0';
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} else if ((u->doc = strdup(p)) == NULL) {
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fetch_syserr();
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goto ouch;
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}
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DEBUG(fprintf(stderr,
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"scheme: \"%s\"\n"
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"user: \"%s\"\n"
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"password: \"%s\"\n"
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"host: \"%s\"\n"
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"port: \"%d\"\n"
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"document: \"%s\"\n",
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u->scheme, u->user, u->pwd,
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u->host, u->port, u->doc));
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return (u);
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ouch:
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free(u);
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return (NULL);
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}
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/*
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* Free a URL
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*/
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void
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fetchFreeURL(struct url *u)
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{
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free(u->doc);
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free(u);
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}
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