lib/libfetch/common.h

   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: head/lib/libfetch/common.h 357968 2020-02-15 18:03:16Z kevans $
  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