1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1998-2014 Dag-Erling Smørgrav 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer 12 * in this position and unchanged. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #ifndef _COMMON_H_INCLUDED 34 #define _COMMON_H_INCLUDED 35 36 #define FTP_DEFAULT_PORT 21 37 #define HTTP_DEFAULT_PORT 80 38 #define FTP_DEFAULT_PROXY_PORT 21 39 #define HTTP_DEFAULT_PROXY_PORT 3128 40 41 #ifdef WITH_SSL 42 #include <openssl/crypto.h> 43 #include <openssl/x509.h> 44 #include <openssl/pem.h> 45 #include <openssl/ssl.h> 46 #include <openssl/err.h> 47 #endif 48 49 /* Connection */ 50 typedef struct fetchconn conn_t; 51 struct fetchconn { 52 int sd; /* socket descriptor */ 53 char *buf; /* buffer */ 54 size_t bufsize; /* buffer size */ 55 size_t buflen; /* length of buffer contents */ 56 int err; /* last protocol reply code */ 57 #ifdef WITH_SSL 58 SSL *ssl; /* SSL handle */ 59 SSL_CTX *ssl_ctx; /* SSL context */ 60 X509 *ssl_cert; /* server certificate */ 61 const SSL_METHOD *ssl_meth; /* SSL method */ 62 #endif 63 int ref; /* reference count */ 64 }; 65 66 /* Structure used for error message lists */ 67 struct fetcherr { 68 const int num; 69 const int cat; 70 const char *string; 71 }; 72 73 /* For SOCKS header size */ 74 #define HEAD_SIZE 4 75 #define FQDN_SIZE 256 76 #define PACK_SIZE 1 77 #define PORT_SIZE 2 78 #define BUFF_SIZE HEAD_SIZE + FQDN_SIZE + PACK_SIZE + PORT_SIZE 79 80 /* SOCKS5 Request Header */ 81 #define SOCKS_VERSION_5 0x05 82 /* SOCKS5 CMD */ 83 #define SOCKS_CONNECTION 0x01 84 #define SOCKS_BIND 0x02 85 #define SOCKS_UDP 0x03 86 #define SOCKS_NOMETHODS 0xFF 87 #define SOCKS5_NOTIMPLEMENTED 0x00 88 /* SOCKS5 Reserved */ 89 #define SOCKS_RSV 0x00 90 /* SOCKS5 Address Type */ 91 #define SOCKS_ATYP_IPV4 0x01 92 #define SOCKS_ATYP_DOMAINNAME 0x03 93 #define SOCKS_ATYP_IPV6 0x04 94 /* SOCKS5 Reply Field */ 95 #define SOCKS_SUCCESS 0x00 96 #define SOCKS_GENERAL_FAILURE 0x01 97 #define SOCKS_CONNECTION_NOT_ALLOWED 0x02 98 #define SOCKS_NETWORK_UNREACHABLE 0x03 99 #define SOCKS_HOST_UNREACHABLE 0x04 100 #define SOCKS_CONNECTION_REFUSED 0x05 101 #define SOCKS_TTL_EXPIRED 0x06 102 #define SOCKS_COMMAND_NOT_SUPPORTED 0x07 103 #define SOCKS_ADDRESS_NOT_SUPPORTED 0x08 104 105 /* for fetch_writev */ 106 struct iovec; 107 108 void fetch_seterr(struct fetcherr *, int); 109 void fetch_syserr(void); 110 void fetch_info(const char *, ...) __printflike(1, 2); 111 int fetch_socks5_getenv(char **host, int *port); 112 int fetch_socks5_init(conn_t *conn, const char *host, 113 int port, int verbose); 114 int fetch_default_port(const char *); 115 int fetch_default_proxy_port(const char *); 116 struct addrinfo *fetch_resolve(const char *, int, int); 117 int fetch_bind(int, int, const char *); 118 conn_t *fetch_connect(const char *, int, int, int); 119 conn_t *fetch_reopen(int); 120 conn_t *fetch_ref(conn_t *); 121 #ifdef WITH_SSL 122 int fetch_ssl_cb_verify_crt(int, X509_STORE_CTX*); 123 #endif 124 int fetch_ssl(conn_t *, const struct url *, int); 125 ssize_t fetch_read(conn_t *, char *, size_t); 126 int fetch_getln(conn_t *); 127 ssize_t fetch_write(conn_t *, const char *, size_t); 128 ssize_t fetch_writev(conn_t *, struct iovec *, int); 129 int fetch_putln(conn_t *, const char *, size_t); 130 int fetch_close(conn_t *); 131 int fetch_add_entry(struct url_ent **, int *, int *, 132 const char *, struct url_stat *); 133 int fetch_netrc_auth(struct url *url); 134 int fetch_no_proxy_match(const char *); 135 136 #define ftp_seterr(n) fetch_seterr(ftp_errlist, n) 137 #define http_seterr(n) fetch_seterr(http_errlist, n) 138 #define netdb_seterr(n) fetch_seterr(netdb_errlist, n) 139 #define url_seterr(n) fetch_seterr(url_errlist, n) 140 #define socks5_seterr(n) fetch_seterr(socks5_errlist, n) 141 142 #ifndef NDEBUG 143 #define DEBUGF(...) \ 144 do { \ 145 if (fetchDebug) \ 146 fprintf(stderr, __VA_ARGS__); \ 147 } while (0) 148 #else 149 #define DEBUGF(...) \ 150 do { \ 151 /* nothing */ \ 152 } while (0) 153 #endif 154 155 /* 156 * I don't really like exporting http_request() and ftp_request(), 157 * but the HTTP and FTP code occasionally needs to cross-call 158 * eachother, and this saves me from adding a lot of special-case code 159 * to handle those cases. 160 * 161 * Note that _*_request() free purl, which is way ugly but saves us a 162 * whole lot of trouble. 163 */ 164 FILE *http_request(struct url *, const char *, 165 struct url_stat *, struct url *, const char *); 166 FILE *http_request_body(struct url *, const char *, 167 struct url_stat *, struct url *, const char *, 168 const char *, const char *); 169 FILE *ftp_request(struct url *, const char *, 170 struct url_stat *, struct url *, const char *); 171 172 /* 173 * Check whether a particular flag is set 174 */ 175 #define CHECK_FLAG(x) (flags && strchr(flags, (x))) 176 177 #endif 178