crypto/bio/bio_local.h

   1 /*
   2  * Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include "e_os.h"
  11 #include "internal/sockets.h"
  12 #include "internal/refcount.h"
  13
  14 /* BEGIN BIO_ADDRINFO/BIO_ADDR stuff. */
  15
  16 #ifndef OPENSSL_NO_SOCK
  17 /*
  18  * Throughout this file and b_addr.c, the existence of the macro
  19  * AI_PASSIVE is used to detect the availability of struct addrinfo,
  20  * getnameinfo() and getaddrinfo().  If that macro doesn't exist,
  21  * we use our own implementation instead.
  22  */
  23
  24 /*
  25  * It's imperative that these macros get defined before openssl/bio.h gets
  26  * included.  Otherwise, the AI_PASSIVE hack will not work properly.
  27  * For clarity, we check for internal/cryptlib.h since it's a common header
  28  * that also includes bio.h.
  29  */
  30 # ifdef OSSL_INTERNAL_CRYPTLIB_H
  31 #  error internal/cryptlib.h included before bio_local.h
  32 # endif
  33 # ifdef OPENSSL_BIO_H
  34 #  error openssl/bio.h included before bio_local.h
  35 # endif
  36
  37 /*
  38  * Undefine AF_UNIX on systems that define it but don't support it.
  39  */
  40 # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_VMS)
  41 #  undef AF_UNIX
  42 # endif
  43
  44 # ifdef AI_PASSIVE
  45
  46 /*
  47  * There's a bug in VMS C header file netdb.h, where struct addrinfo
  48  * always is the P32 variant, but the functions that handle that structure,
  49  * such as getaddrinfo() and freeaddrinfo() adapt to the initial pointer
  50  * size.  The easiest workaround is to force struct addrinfo to be the
  51  * 64-bit variant when compiling in P64 mode.
  52  */
  53 #  if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE == 64
  54 #   define addrinfo __addrinfo64
  55 #  endif
  56
  57 #  define bio_addrinfo_st addrinfo
  58 #  define bai_family      ai_family
  59 #  define bai_socktype    ai_socktype
  60 #  define bai_protocol    ai_protocol
  61 #  define bai_addrlen     ai_addrlen
  62 #  define bai_addr        ai_addr
  63 #  define bai_next        ai_next
  64 # else
  65 struct bio_addrinfo_st {
  66     int bai_family;
  67     int bai_socktype;
  68     int bai_protocol;
  69     size_t bai_addrlen;
  70     struct sockaddr *bai_addr;
  71     struct bio_addrinfo_st *bai_next;
  72 };
  73 # endif
  74
  75 union bio_addr_st {
  76     struct sockaddr sa;
  77 # ifdef AF_INET6
  78     struct sockaddr_in6 s_in6;
  79 # endif
  80     struct sockaddr_in s_in;
  81 # ifdef AF_UNIX
  82     struct sockaddr_un s_un;
  83 # endif
  84 };
  85 #endif
  86
  87 /* END BIO_ADDRINFO/BIO_ADDR stuff. */
  88
  89 #include "internal/cryptlib.h"
  90 #include "internal/bio.h"
  91
  92 typedef struct bio_f_buffer_ctx_struct {
  93     /*-
  94      * Buffers are setup like this:
  95      *
  96      * <---------------------- size ----------------------->
  97      * +---------------------------------------------------+
  98      * | consumed | remaining          | free space        |
  99      * +---------------------------------------------------+
 100      * <-- off --><------- len ------->
 101      */
 102     /*- BIO *bio; *//*
 103      * this is now in the BIO struct
 104      */
 105     int ibuf_size;              /* how big is the input buffer */
 106     int obuf_size;              /* how big is the output buffer */
 107     char *ibuf;                 /* the char array */
 108     int ibuf_len;               /* how many bytes are in it */
 109     int ibuf_off;               /* write/read offset */
 110     char *obuf;                 /* the char array */
 111     int obuf_len;               /* how many bytes are in it */
 112     int obuf_off;               /* write/read offset */
 113 } BIO_F_BUFFER_CTX;
 114
 115 struct bio_st {
 116     OSSL_LIB_CTX *libctx;
 117     const BIO_METHOD *method;
 118     /* bio, mode, argp, argi, argl, ret */
 119     BIO_callback_fn callback;
 120     BIO_callback_fn_ex callback_ex;
 121     char *cb_arg;               /* first argument for the callback */
 122     int init;
 123     int shutdown;
 124     int flags;                  /* extra storage */
 125     int retry_reason;
 126     int num;
 127     void *ptr;
 128     struct bio_st *next_bio;    /* used by filter BIOs */
 129     struct bio_st *prev_bio;    /* used by filter BIOs */
 130     CRYPTO_REF_COUNT references;
 131     uint64_t num_read;
 132     uint64_t num_write;
 133     CRYPTO_EX_DATA ex_data;
 134     CRYPTO_RWLOCK *lock;
 135 };
 136
 137 #ifndef OPENSSL_NO_SOCK
 138 # ifdef OPENSSL_SYS_VMS
 139 typedef unsigned int socklen_t;
 140 # endif
 141
 142 extern CRYPTO_RWLOCK *bio_lookup_lock;
 143
 144 int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa);
 145 const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap);
 146 struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap);
 147 socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap);
 148 socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai);
 149 const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai);
 150 #endif
 151
 152 extern CRYPTO_RWLOCK *bio_type_lock;
 153
 154 void bio_sock_cleanup_int(void);
 155
 156 #if BIO_FLAGS_UPLINK_INTERNAL==0
 157 /* Shortcut UPLINK calls on most platforms... */
 158 # define UP_stdin        stdin
 159 # define UP_stdout       stdout
 160 # define UP_stderr       stderr
 161 # define UP_fprintf      fprintf
 162 # define UP_fgets        fgets
 163 # define UP_fread        fread
 164 # define UP_fwrite       fwrite
 165 # undef  UP_fsetmod
 166 # define UP_feof         feof
 167 # define UP_fclose       fclose
 168
 169 # define UP_fopen        fopen
 170 # define UP_fseek        fseek
 171 # define UP_ftell        ftell
 172 # define UP_fflush       fflush
 173 # define UP_ferror       ferror
 174 # ifdef _WIN32
 175 #  define UP_fileno       _fileno
 176 #  define UP_open         _open
 177 #  define UP_read         _read
 178 #  define UP_write        _write
 179 #  define UP_lseek        _lseek
 180 #  define UP_close        _close
 181 # else
 182 #  define UP_fileno       fileno
 183 #  define UP_open         open
 184 #  define UP_read         read
 185 #  define UP_write        write
 186 #  define UP_lseek        lseek
 187 #  define UP_close        close
 188 # endif
 189
 190 #endif
 191