939a66af62
progress information. The first is that fetch_read() (used in the HTTP code but not the FTP code) can enter an infinite loop if it has previously been interrupted by a signal. The second is that when it is interrupted, fetch_read() will discard any data it may have read up to that point. Luckily, both bugs are extremely timing-sensitive and therefore difficult to trigger. PR: bin/153240 Submitted by: Mark <markjdb@gmail.com> MFC after: 3 weeks
133 lines
4.3 KiB
C
133 lines
4.3 KiB
C
/*-
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* Copyright (c) 1998-2011 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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* $FreeBSD$
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*/
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#ifndef _COMMON_H_INCLUDED
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#define _COMMON_H_INCLUDED
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#define FTP_DEFAULT_PORT 21
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#define HTTP_DEFAULT_PORT 80
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#define FTP_DEFAULT_PROXY_PORT 21
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#define HTTP_DEFAULT_PROXY_PORT 3128
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#ifdef WITH_SSL
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#include <openssl/crypto.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#endif
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/* Connection */
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typedef struct fetchconn conn_t;
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struct fetchconn {
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int sd; /* socket descriptor */
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char *buf; /* buffer */
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size_t bufsize; /* buffer size */
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size_t buflen; /* length of buffer contents */
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int err; /* last protocol reply code */
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struct { /* data cached after an interrupted
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read */
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char *buf;
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size_t size;
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size_t pos;
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size_t len;
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} cache;
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#ifdef WITH_SSL
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SSL *ssl; /* SSL handle */
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SSL_CTX *ssl_ctx; /* SSL context */
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X509 *ssl_cert; /* server certificate */
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SSL_METHOD *ssl_meth; /* SSL method */
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#endif
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int ref; /* reference count */
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};
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/* Structure used for error message lists */
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struct fetcherr {
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const int num;
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const int cat;
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const char *string;
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};
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/* for fetch_writev */
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struct iovec;
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void fetch_seterr(struct fetcherr *, int);
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void fetch_syserr(void);
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void fetch_info(const char *, ...);
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int fetch_default_port(const char *);
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int fetch_default_proxy_port(const char *);
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int fetch_bind(int, int, const char *);
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conn_t *fetch_connect(const char *, int, int, int);
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conn_t *fetch_reopen(int);
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conn_t *fetch_ref(conn_t *);
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int fetch_ssl(conn_t *, int);
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ssize_t fetch_read(conn_t *, char *, size_t);
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int fetch_getln(conn_t *);
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ssize_t fetch_write(conn_t *, const char *, size_t);
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ssize_t fetch_writev(conn_t *, struct iovec *, int);
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int fetch_putln(conn_t *, const char *, size_t);
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int fetch_close(conn_t *);
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int fetch_add_entry(struct url_ent **, int *, int *,
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const char *, struct url_stat *);
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int fetch_netrc_auth(struct url *url);
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int fetch_no_proxy_match(const char *);
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#define ftp_seterr(n) fetch_seterr(ftp_errlist, n)
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#define http_seterr(n) fetch_seterr(http_errlist, n)
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#define netdb_seterr(n) fetch_seterr(netdb_errlist, n)
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#define url_seterr(n) fetch_seterr(url_errlist, n)
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#ifndef NDEBUG
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#define DEBUG(x) do { if (fetchDebug) { x; } } while (0)
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#else
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#define DEBUG(x) do { } while (0)
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#endif
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/*
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* I don't really like exporting http_request() and ftp_request(),
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* but the HTTP and FTP code occasionally needs to cross-call
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* eachother, and this saves me from adding a lot of special-case code
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* to handle those cases.
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*
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* Note that _*_request() free purl, which is way ugly but saves us a
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* whole lot of trouble.
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*/
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FILE *http_request(struct url *, const char *,
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struct url_stat *, struct url *, const char *);
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FILE *ftp_request(struct url *, const char *,
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struct url_stat *, struct url *, const char *);
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/*
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* Check whether a particular flag is set
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*/
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#define CHECK_FLAG(x) (flags && strchr(flags, (x)))
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#endif
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