1/*
2 * Copyright 2005-2016 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
65struct 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
75union 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
92typedef 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
115struct bio_st {
116 const BIO_METHOD *method;
117 /* bio, mode, argp, argi, argl, ret */
118 BIO_callback_fn callback;
119 BIO_callback_fn_ex callback_ex;
120 char *cb_arg; /* first argument for the callback */
121 int init;
122 int shutdown;
123 int flags; /* extra storage */
124 int retry_reason;
125 int num;
126 void *ptr;
127 struct bio_st *next_bio; /* used by filter BIOs */
128 struct bio_st *prev_bio; /* used by filter BIOs */
129 CRYPTO_REF_COUNT references;
130 uint64_t num_read;
131 uint64_t num_write;
132 CRYPTO_EX_DATA ex_data;
133 CRYPTO_RWLOCK *lock;
134};
135
136#ifndef OPENSSL_NO_SOCK
137# ifdef OPENSSL_SYS_VMS
138typedef unsigned int socklen_t;
139# endif
140
141extern CRYPTO_RWLOCK *bio_lookup_lock;
142
143int BIO_ADDR_make(BIO_ADDR *ap, const struct sockaddr *sa);
144const struct sockaddr *BIO_ADDR_sockaddr(const BIO_ADDR *ap);
145struct sockaddr *BIO_ADDR_sockaddr_noconst(BIO_ADDR *ap);
146socklen_t BIO_ADDR_sockaddr_size(const BIO_ADDR *ap);
147socklen_t BIO_ADDRINFO_sockaddr_size(const BIO_ADDRINFO *bai);
148const struct sockaddr *BIO_ADDRINFO_sockaddr(const BIO_ADDRINFO *bai);
149#endif
150
151extern CRYPTO_RWLOCK *bio_type_lock;
152
153void bio_sock_cleanup_int(void);
154
155#if BIO_FLAGS_UPLINK_INTERNAL==0
156/* Shortcut UPLINK calls on most platforms... */
157# define UP_stdin stdin
158# define UP_stdout stdout
159# define UP_stderr stderr
160# define UP_fprintf fprintf
161# define UP_fgets fgets
162# define UP_fread fread
163# define UP_fwrite fwrite
164# undef UP_fsetmod
165# define UP_feof feof
166# define UP_fclose fclose
167
168# define UP_fopen fopen
169# define UP_fseek fseek
170# define UP_ftell ftell
171# define UP_fflush fflush
172# define UP_ferror ferror
173# ifdef _WIN32
174# define UP_fileno _fileno
175# define UP_open _open
176# define UP_read _read
177# define UP_write _write
178# define UP_lseek _lseek
179# define UP_close _close
180# else
181# define UP_fileno fileno
182# define UP_open open
183# define UP_read read
184# define UP_write write
185# define UP_lseek lseek
186# define UP_close close
187# endif
188
189#endif
190
191