[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <errno.h>
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| 12 | #define USE_SOCKETS
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| 13 | #include "bio_lcl.h"
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| 14 | #include "internal/cryptlib.h"
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| 15 |
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| 16 | #ifndef OPENSSL_NO_SOCK
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| 17 |
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| 18 | # include <openssl/bio.h>
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| 19 |
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| 20 | # ifdef WATT32
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| 21 | /* Watt-32 uses same names */
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| 22 | # undef sock_write
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| 23 | # undef sock_read
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| 24 | # undef sock_puts
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| 25 | # define sock_write SockWrite
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| 26 | # define sock_read SockRead
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| 27 | # define sock_puts SockPuts
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| 28 | # endif
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| 29 |
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| 30 | static int sock_write(BIO *h, const char *buf, int num);
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| 31 | static int sock_read(BIO *h, char *buf, int size);
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| 32 | static int sock_puts(BIO *h, const char *str);
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| 33 | static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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| 34 | static int sock_new(BIO *h);
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| 35 | static int sock_free(BIO *data);
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| 36 | int BIO_sock_should_retry(int s);
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| 37 |
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| 38 | static const BIO_METHOD methods_sockp = {
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| 39 | BIO_TYPE_SOCKET,
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| 40 | "socket",
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| 41 | sock_write,
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| 42 | sock_read,
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| 43 | sock_puts,
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| 44 | NULL, /* sock_gets, */
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| 45 | sock_ctrl,
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| 46 | sock_new,
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| 47 | sock_free,
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| 48 | NULL,
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| 49 | };
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| 50 |
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| 51 | const BIO_METHOD *BIO_s_socket(void)
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| 52 | {
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| 53 | return (&methods_sockp);
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| 54 | }
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| 55 |
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| 56 | BIO *BIO_new_socket(int fd, int close_flag)
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| 57 | {
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| 58 | BIO *ret;
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| 59 |
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| 60 | ret = BIO_new(BIO_s_socket());
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| 61 | if (ret == NULL)
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| 62 | return (NULL);
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| 63 | BIO_set_fd(ret, fd, close_flag);
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| 64 | return (ret);
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| 65 | }
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| 66 |
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| 67 | static int sock_new(BIO *bi)
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| 68 | {
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| 69 | bi->init = 0;
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| 70 | bi->num = 0;
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| 71 | bi->ptr = NULL;
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| 72 | bi->flags = 0;
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| 73 | return (1);
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| 74 | }
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| 75 |
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| 76 | static int sock_free(BIO *a)
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| 77 | {
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| 78 | if (a == NULL)
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| 79 | return (0);
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| 80 | if (a->shutdown) {
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| 81 | if (a->init) {
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| 82 | BIO_closesocket(a->num);
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| 83 | }
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| 84 | a->init = 0;
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| 85 | a->flags = 0;
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| 86 | }
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| 87 | return (1);
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| 88 | }
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| 89 |
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| 90 | static int sock_read(BIO *b, char *out, int outl)
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| 91 | {
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| 92 | int ret = 0;
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| 93 |
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| 94 | if (out != NULL) {
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| 95 | clear_socket_error();
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| 96 | ret = readsocket(b->num, out, outl);
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| 97 | BIO_clear_retry_flags(b);
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| 98 | if (ret <= 0) {
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| 99 | if (BIO_sock_should_retry(ret))
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| 100 | BIO_set_retry_read(b);
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| 101 | }
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| 102 | }
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| 103 | return (ret);
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| 104 | }
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| 105 |
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| 106 | static int sock_write(BIO *b, const char *in, int inl)
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| 107 | {
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| 108 | int ret;
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| 109 |
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| 110 | clear_socket_error();
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| 111 | ret = writesocket(b->num, in, inl);
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| 112 | BIO_clear_retry_flags(b);
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| 113 | if (ret <= 0) {
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| 114 | if (BIO_sock_should_retry(ret))
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| 115 | BIO_set_retry_write(b);
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| 116 | }
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| 117 | return (ret);
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| 118 | }
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| 119 |
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| 120 | static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
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| 121 | {
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| 122 | long ret = 1;
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| 123 | int *ip;
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| 124 |
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| 125 | switch (cmd) {
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| 126 | case BIO_C_SET_FD:
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| 127 | sock_free(b);
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| 128 | b->num = *((int *)ptr);
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| 129 | b->shutdown = (int)num;
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| 130 | b->init = 1;
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| 131 | break;
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| 132 | case BIO_C_GET_FD:
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| 133 | if (b->init) {
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| 134 | ip = (int *)ptr;
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| 135 | if (ip != NULL)
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| 136 | *ip = b->num;
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| 137 | ret = b->num;
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| 138 | } else
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| 139 | ret = -1;
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| 140 | break;
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| 141 | case BIO_CTRL_GET_CLOSE:
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| 142 | ret = b->shutdown;
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| 143 | break;
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| 144 | case BIO_CTRL_SET_CLOSE:
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| 145 | b->shutdown = (int)num;
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| 146 | break;
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| 147 | case BIO_CTRL_DUP:
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| 148 | case BIO_CTRL_FLUSH:
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| 149 | ret = 1;
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| 150 | break;
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| 151 | default:
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| 152 | ret = 0;
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| 153 | break;
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| 154 | }
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| 155 | return (ret);
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| 156 | }
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| 157 |
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| 158 | static int sock_puts(BIO *bp, const char *str)
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| 159 | {
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| 160 | int n, ret;
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| 161 |
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| 162 | n = strlen(str);
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| 163 | ret = sock_write(bp, str, n);
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| 164 | return (ret);
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| 165 | }
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| 166 |
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| 167 | int BIO_sock_should_retry(int i)
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| 168 | {
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| 169 | int err;
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| 170 |
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| 171 | if ((i == 0) || (i == -1)) {
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| 172 | err = get_last_socket_error();
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| 173 |
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| 174 | return (BIO_sock_non_fatal_error(err));
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| 175 | }
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| 176 | return (0);
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| 177 | }
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| 178 |
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| 179 | int BIO_sock_non_fatal_error(int err)
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| 180 | {
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| 181 | switch (err) {
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| 182 | # if defined(OPENSSL_SYS_WINDOWS)
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| 183 | # if defined(WSAEWOULDBLOCK)
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| 184 | case WSAEWOULDBLOCK:
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| 185 | # endif
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| 186 | # endif
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| 187 |
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| 188 | # ifdef EWOULDBLOCK
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| 189 | # ifdef WSAEWOULDBLOCK
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| 190 | # if WSAEWOULDBLOCK != EWOULDBLOCK
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| 191 | case EWOULDBLOCK:
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| 192 | # endif
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| 193 | # else
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| 194 | case EWOULDBLOCK:
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| 195 | # endif
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| 196 | # endif
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| 197 |
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| 198 | # if defined(ENOTCONN)
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| 199 | case ENOTCONN:
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| 200 | # endif
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| 201 |
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| 202 | # ifdef EINTR
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| 203 | case EINTR:
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| 204 | # endif
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| 205 |
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| 206 | # ifdef EAGAIN
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| 207 | # if EWOULDBLOCK != EAGAIN
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| 208 | case EAGAIN:
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| 209 | # endif
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| 210 | # endif
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| 211 |
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| 212 | # ifdef EPROTO
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| 213 | case EPROTO:
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| 214 | # endif
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| 215 |
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| 216 | # ifdef EINPROGRESS
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| 217 | case EINPROGRESS:
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| 218 | # endif
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| 219 |
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| 220 | # ifdef EALREADY
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| 221 | case EALREADY:
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| 222 | # endif
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| 223 | return (1);
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| 224 | /* break; */
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| 225 | default:
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| 226 | break;
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| 227 | }
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| 228 | return (0);
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| 229 | }
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| 230 |
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| 231 | #endif /* #ifndef OPENSSL_NO_SOCK */
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