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 13 /* BEGIN BIO_ADDRINFO/BIO_ADDR stuff. */ 14 15 #ifndef OPENSSL_NO_SOCK 16 /* 17 * Throughout this file and b_addr.c, the existence of the macro 18 * AI_PASSIVE is used to detect the availability of struct addrinfo, 19 * getnameinfo() and getaddrinfo(). If that macro doesn't exist, 20 * we use our own implementation instead. 21 */ 22 23 /* 24 * It's imperative that these macros get defined before openssl/bio.h gets 25 * included. Otherwise, the AI_PASSIVE hack will not work properly. 26 * For clarity, we check for internal/cryptlib.h since it's a common header 27 * that also includes bio.h. 28 */ 29 # ifdef OSSL_INTERNAL_CRYPTLIB_H 30 # error internal/cryptlib.h included before bio_local.h 31 # endif 32 # ifdef OPENSSL_BIO_H 33 # error openssl/bio.h included before bio_local.h 34 # endif 35 36 /* 37 * Undefine AF_UNIX on systems that define it but don't support it. 38 */ 39 # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_VMS) 40 # undef AF_UNIX 41 # endif 42 43 # ifdef AI_PASSIVE 44 45 /* 46 * There's a bug in VMS C header file netdb.h, where struct addrinfo 47 * always is the P32 variant, but the functions that handle that structure, 48 * such as getaddrinfo() and freeaddrinfo() adapt to the initial pointer 49 * size. The easiest workaround is to force struct addrinfo to be the 50 * 64-bit variant when compiling in P64 mode. 51 */ 52 # if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE == 64 53 # define addrinfo __addrinfo64 54 # endif 55 56 # define bio_addrinfo_st addrinfo 57 # define bai_family ai_family 58 # define bai_socktype ai_socktype 59 # define bai_protocol ai_protocol 60 # define bai_addrlen ai_addrlen 61 # define bai_addr ai_addr 62 # define bai_next ai_next 63 # else 64 struct bio_addrinfo_st { 65 int bai_family; 66 int bai_socktype; 67 int bai_protocol; 68 size_t bai_addrlen; 69 struct sockaddr *bai_addr; 70 struct bio_addrinfo_st *bai_next; 71 }; 72 # endif 73 74 union bio_addr_st { 75 struct sockaddr sa; 76 # ifdef AF_INET6 77 struct sockaddr_in6 s_in6; 78 # endif 79 struct sockaddr_in s_in; 80 # ifdef AF_UNIX 81 struct sockaddr_un s_un; 82 # endif 83 }; 84 #endif 85 86 /* END BIO_ADDRINFO/BIO_ADDR stuff. */ 87 88 #include "internal/cryptlib.h" 89 #include "internal/bio.h" 90 #include "internal/refcount.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 #ifndef OPENSSL_NO_DEPRECATED_3_0 120 BIO_callback_fn callback; 121 #endif 122 BIO_callback_fn_ex callback_ex; 123 char *cb_arg; /* first argument for the callback */ 124 int init; 125 int shutdown; 126 int flags; /* extra storage */ 127 int retry_reason; 128 int num; 129 void *ptr; 130 struct bio_st *next_bio; /* used by filter BIOs */ 131 struct bio_st *prev_bio; /* used by filter BIOs */ 132 CRYPTO_REF_COUNT references; 133 uint64_t num_read; 134 uint64_t num_write; 135 CRYPTO_EX_DATA ex_data; 136 CRYPTO_RWLOCK *lock; 137 }; 138 139 #ifndef OPENSSL_NO_SOCK 140 # ifdef OPENSSL_SYS_VMS 141 typedef unsigned int socklen_t; 142 # endif 143 144 extern CRYPTO_RWLOCK *bio_lookup_lock; 145 146 int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa); 147 const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap); 148 struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap); 149 socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap); 150 socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai); 151 const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai); 152 #endif 153 154 extern CRYPTO_RWLOCK *bio_type_lock; 155 156 void bio_sock_cleanup_int(void); 157 158 #if BIO_FLAGS_UPLINK_INTERNAL==0 159 /* Shortcut UPLINK calls on most platforms... */ 160 # define UP_stdin stdin 161 # define UP_stdout stdout 162 # define UP_stderr stderr 163 # define UP_fprintf fprintf 164 # define UP_fgets fgets 165 # define UP_fread fread 166 # define UP_fwrite fwrite 167 # undef UP_fsetmod 168 # define UP_feof feof 169 # define UP_fclose fclose 170 171 # define UP_fopen fopen 172 # define UP_fseek fseek 173 # define UP_ftell ftell 174 # define UP_fflush fflush 175 # define UP_ferror ferror 176 # ifdef _WIN32 177 # define UP_fileno _fileno 178 # define UP_open _open 179 # define UP_read _read 180 # define UP_write _write 181 # define UP_lseek _lseek 182 # define UP_close _close 183 # else 184 # define UP_fileno fileno 185 # define UP_open open 186 # define UP_read read 187 # define UP_write write 188 # define UP_lseek lseek 189 # define UP_close close 190 # endif 191 192 #endif 193 194