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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1998-2014 Dag-Erling 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.
*/
#ifndef _COMMON_H_INCLUDED
#define _COMMON_H_INCLUDED
#define FTP_DEFAULT_PORT 21
#define HTTP_DEFAULT_PORT 80
#define FTP_DEFAULT_PROXY_PORT 21
#define HTTP_DEFAULT_PROXY_PORT 3128
#ifdef WITH_SSL
#include <openssl/crypto.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#endif
/* Connection */
typedef struct fetchconn conn_t;
struct fetchconn {
int sd; /* socket descriptor */
char *buf; /* buffer */
size_t bufsize; /* buffer size */
size_t buflen; /* length of buffer contents */
int err; /* last protocol reply code */
#ifdef WITH_SSL
SSL *ssl; /* SSL handle */
SSL_CTX *ssl_ctx; /* SSL context */
X509 *ssl_cert; /* server certificate */
const SSL_METHOD *ssl_meth; /* SSL method */
#endif
int ref; /* reference count */
};
/* Structure used for error message lists */
struct fetcherr {
const int num;
const int cat;
const char *string;
};
/* For SOCKS header size */
#define HEAD_SIZE 4
#define FQDN_SIZE 256
#define PACK_SIZE 1
#define PORT_SIZE 2
#define BUFF_SIZE HEAD_SIZE + FQDN_SIZE + PACK_SIZE + PORT_SIZE
/* SOCKS5 Request Header */
#define SOCKS_VERSION_5 0x05
/* SOCKS5 CMD */
#define SOCKS_CONNECTION 0x01
#define SOCKS_BIND 0x02
#define SOCKS_UDP 0x03
#define SOCKS_NOMETHODS 0xFF
#define SOCKS5_NOTIMPLEMENTED 0x00
/* SOCKS5 Reserved */
#define SOCKS_RSV 0x00
/* SOCKS5 Address Type */
#define SOCKS_ATYP_IPV4 0x01
#define SOCKS_ATYP_DOMAINNAME 0x03
#define SOCKS_ATYP_IPV6 0x04
/* SOCKS5 Reply Field */
#define SOCKS_SUCCESS 0x00
#define SOCKS_GENERAL_FAILURE 0x01
#define SOCKS_CONNECTION_NOT_ALLOWED 0x02
#define SOCKS_NETWORK_UNREACHABLE 0x03
#define SOCKS_HOST_UNREACHABLE 0x04
#define SOCKS_CONNECTION_REFUSED 0x05
#define SOCKS_TTL_EXPIRED 0x06
#define SOCKS_COMMAND_NOT_SUPPORTED 0x07
#define SOCKS_ADDRESS_NOT_SUPPORTED 0x08
/* for fetch_writev */
struct iovec;
void fetch_seterr(struct fetcherr *, int);
void fetch_syserr(void);
void fetch_info(const char *, ...) __printflike(1, 2);
int fetch_socks5_getenv(char **host, int *port);
int fetch_socks5_init(conn_t *conn, const char *host,
int port, int verbose);
int fetch_default_port(const char *);
int fetch_default_proxy_port(const char *);
struct addrinfo *fetch_resolve(const char *, int, int);
int fetch_bind(int, int, const char *);
conn_t *fetch_connect(const char *, int, int, int);
conn_t *fetch_reopen(int);
conn_t *fetch_ref(conn_t *);
#ifdef WITH_SSL
int fetch_ssl_cb_verify_crt(int, X509_STORE_CTX*);
#endif
int fetch_ssl(conn_t *, const struct url *, int);
ssize_t fetch_read(conn_t *, char *, size_t);
int fetch_getln(conn_t *);
ssize_t fetch_write(conn_t *, const char *, size_t);
ssize_t fetch_writev(conn_t *, struct iovec *, int);
int fetch_putln(conn_t *, const char *, size_t);
int fetch_close(conn_t *);
int fetch_add_entry(struct url_ent **, int *, int *,
const char *, struct url_stat *);
int fetch_netrc_auth(struct url *url);
int fetch_no_proxy_match(const char *);
#define ftp_seterr(n) fetch_seterr(ftp_errlist, n)
#define http_seterr(n) fetch_seterr(http_errlist, n)
#define netdb_seterr(n) fetch_seterr(netdb_errlist, n)
#define url_seterr(n) fetch_seterr(url_errlist, n)
#define socks5_seterr(n) fetch_seterr(socks5_errlist, n)
#ifndef NDEBUG
#define DEBUGF(...) \
do { \
if (fetchDebug) \
fprintf(stderr, __VA_ARGS__); \
} while (0)
#else
#define DEBUGF(...) \
do { \
/* nothing */ \
} while (0)
#endif
/*
* I don't really like exporting http_request() and ftp_request(),
* but the HTTP and FTP code occasionally needs to cross-call
* eachother, and this saves me from adding a lot of special-case code
* to handle those cases.
*
* Note that _*_request() free purl, which is way ugly but saves us a
* whole lot of trouble.
*/
FILE *http_request(struct url *, const char *,
struct url_stat *, struct url *, const char *);
FILE *http_request_body(struct url *, const char *,
struct url_stat *, struct url *, const char *,
const char *, const char *);
FILE *ftp_request(struct url *, const char *,
struct url_stat *, struct url *, const char *);
/*
* Check whether a particular flag is set
*/
#define CHECK_FLAG(x) (flags && strchr(flags, (x)))
#endif
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