| 1 | /*
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| 2 | * Copyright 1995-2018 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 <stdlib.h>
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| 12 | #include <errno.h>
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| 13 | #include "bio_local.h"
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| 14 | #ifndef OPENSSL_NO_SOCK
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| 15 | # define SOCKET_PROTOCOL IPPROTO_TCP
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| 16 | # ifdef SO_MAXCONN
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| 17 | # define MAX_LISTEN SO_MAXCONN
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| 18 | # elif defined(SOMAXCONN)
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| 19 | # define MAX_LISTEN SOMAXCONN
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| 20 | # else
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| 21 | # define MAX_LISTEN 32
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| 22 | # endif
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| 23 | # if defined(OPENSSL_SYS_WINDOWS)
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| 24 | static int wsa_init_done = 0;
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| 25 | # endif
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| 26 |
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| 27 | # if OPENSSL_API_COMPAT < 0x10100000L
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| 28 | int BIO_get_host_ip(const char *str, unsigned char *ip)
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| 29 | {
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| 30 | BIO_ADDRINFO *res = NULL;
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| 31 | int ret = 0;
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| 32 |
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| 33 | if (BIO_sock_init() != 1)
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| 34 | return 0; /* don't generate another error code here */
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| 35 |
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| 36 | if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
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| 37 | size_t l;
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| 38 |
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| 39 | if (BIO_ADDRINFO_family(res) != AF_INET) {
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| 40 | BIOerr(BIO_F_BIO_GET_HOST_IP,
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| 41 | BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
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| 42 | } else if (BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l)) {
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| 43 | /*
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| 44 | * Because only AF_INET addresses will reach this far, we can assert
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| 45 | * that l should be 4
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| 46 | */
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| 47 | if (ossl_assert(l == 4))
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| 48 | ret = BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
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| 49 | }
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| 50 | BIO_ADDRINFO_free(res);
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| 51 | } else {
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| 52 | ERR_add_error_data(2, "host=", str);
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| 53 | }
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| 54 |
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| 55 | return ret;
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| 56 | }
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| 57 |
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| 58 | int BIO_get_port(const char *str, unsigned short *port_ptr)
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| 59 | {
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| 60 | BIO_ADDRINFO *res = NULL;
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| 61 | int ret = 0;
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| 62 |
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| 63 | if (str == NULL) {
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| 64 | BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
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| 65 | return 0;
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| 66 | }
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| 67 |
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| 68 | if (BIO_sock_init() != 1)
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| 69 | return 0; /* don't generate another error code here */
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| 70 |
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| 71 | if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
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| 72 | if (BIO_ADDRINFO_family(res) != AF_INET) {
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| 73 | BIOerr(BIO_F_BIO_GET_PORT,
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| 74 | BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
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| 75 | } else {
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| 76 | *port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
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| 77 | ret = 1;
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| 78 | }
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| 79 | BIO_ADDRINFO_free(res);
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| 80 | } else {
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| 81 | ERR_add_error_data(2, "host=", str);
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| 82 | }
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| 83 |
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| 84 | return ret;
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| 85 | }
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| 86 | # endif
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| 87 |
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| 88 | int BIO_sock_error(int sock)
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| 89 | {
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| 90 | int j = 0, i;
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| 91 | socklen_t size = sizeof(j);
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| 92 |
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| 93 | /*
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| 94 | * Note: under Windows the third parameter is of type (char *) whereas
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| 95 | * under other systems it is (void *) if you don't have a cast it will
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| 96 | * choke the compiler: if you do have a cast then you can either go for
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| 97 | * (char *) or (void *).
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| 98 | */
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| 99 | i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, &size);
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| 100 | if (i < 0)
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| 101 | return get_last_socket_error();
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| 102 | else
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| 103 | return j;
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| 104 | }
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| 105 |
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| 106 | # if OPENSSL_API_COMPAT < 0x10100000L
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| 107 | struct hostent *BIO_gethostbyname(const char *name)
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| 108 | {
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| 109 | /*
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| 110 | * Caching gethostbyname() results forever is wrong, so we have to let
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| 111 | * the true gethostbyname() worry about this
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| 112 | */
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| 113 | return gethostbyname(name);
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| 114 | }
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| 115 | # endif
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| 116 |
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| 117 | int BIO_sock_init(void)
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| 118 | {
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| 119 | # ifdef OPENSSL_SYS_WINDOWS
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| 120 | static struct WSAData wsa_state;
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| 121 |
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| 122 | if (!wsa_init_done) {
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| 123 | int err;
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| 124 |
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| 125 | wsa_init_done = 1;
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| 126 | memset(&wsa_state, 0, sizeof(wsa_state));
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| 127 | /*
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| 128 | * Not making wsa_state available to the rest of the code is formally
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| 129 | * wrong. But the structures we use are [believed to be] invariable
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| 130 | * among Winsock DLLs, while API availability is [expected to be]
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| 131 | * probed at run-time with DSO_global_lookup.
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| 132 | */
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| 133 | if (WSAStartup(0x0202, &wsa_state) != 0) {
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| 134 | err = WSAGetLastError();
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| 135 | SYSerr(SYS_F_WSASTARTUP, err);
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| 136 | BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
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| 137 | return -1;
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| 138 | }
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| 139 | }
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| 140 | # endif /* OPENSSL_SYS_WINDOWS */
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| 141 | # ifdef WATT32
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| 142 | extern int _watt_do_exit;
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| 143 | _watt_do_exit = 0; /* don't make sock_init() call exit() */
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| 144 | if (sock_init())
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| 145 | return -1;
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| 146 | # endif
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| 147 |
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| 148 | return 1;
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| 149 | }
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| 150 |
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| 151 | void bio_sock_cleanup_int(void)
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| 152 | {
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| 153 | # ifdef OPENSSL_SYS_WINDOWS
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| 154 | if (wsa_init_done) {
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| 155 | wsa_init_done = 0;
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| 156 | WSACleanup();
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| 157 | }
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| 158 | # endif
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| 159 | }
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| 160 |
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| 161 | int BIO_socket_ioctl(int fd, long type, void *arg)
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| 162 | {
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| 163 | int i;
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| 164 |
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| 165 | # ifdef __DJGPP__
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| 166 | i = ioctlsocket(fd, type, (char *)arg);
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| 167 | # else
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| 168 | # if defined(OPENSSL_SYS_VMS)
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| 169 | /*-
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| 170 | * 2011-02-18 SMS.
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| 171 | * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
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| 172 | * observe that all the consumers pass in an "unsigned long *",
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| 173 | * so we arrange a local copy with a short pointer, and use
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| 174 | * that, instead.
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| 175 | */
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| 176 | # if __INITIAL_POINTER_SIZE == 64
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| 177 | # define ARG arg_32p
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| 178 | # pragma pointer_size save
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| 179 | # pragma pointer_size 32
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| 180 | unsigned long arg_32;
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| 181 | unsigned long *arg_32p;
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| 182 | # pragma pointer_size restore
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| 183 | arg_32p = &arg_32;
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| 184 | arg_32 = *((unsigned long *)arg);
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| 185 | # else /* __INITIAL_POINTER_SIZE == 64 */
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| 186 | # define ARG arg
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| 187 | # endif /* __INITIAL_POINTER_SIZE == 64 [else] */
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| 188 | # else /* defined(OPENSSL_SYS_VMS) */
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| 189 | # define ARG arg
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| 190 | # endif /* defined(OPENSSL_SYS_VMS) [else] */
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| 191 |
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| 192 | i = ioctlsocket(fd, type, ARG);
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| 193 | # endif /* __DJGPP__ */
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| 194 | if (i < 0)
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| 195 | SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error());
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| 196 | return i;
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| 197 | }
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| 198 |
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| 199 | # if OPENSSL_API_COMPAT < 0x10100000L
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| 200 | int BIO_get_accept_socket(char *host, int bind_mode)
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| 201 | {
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| 202 | int s = INVALID_SOCKET;
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| 203 | char *h = NULL, *p = NULL;
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| 204 | BIO_ADDRINFO *res = NULL;
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| 205 |
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| 206 | if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
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| 207 | return INVALID_SOCKET;
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| 208 |
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| 209 | if (BIO_sock_init() != 1)
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| 210 | return INVALID_SOCKET;
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| 211 |
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| 212 | if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
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| 213 | goto err;
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| 214 |
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| 215 | if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
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| 216 | BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
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| 217 | s = INVALID_SOCKET;
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| 218 | goto err;
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| 219 | }
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| 220 |
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| 221 | if (!BIO_listen(s, BIO_ADDRINFO_address(res),
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| 222 | bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
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| 223 | BIO_closesocket(s);
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| 224 | s = INVALID_SOCKET;
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| 225 | }
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| 226 |
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| 227 | err:
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| 228 | BIO_ADDRINFO_free(res);
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| 229 | OPENSSL_free(h);
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| 230 | OPENSSL_free(p);
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| 231 |
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| 232 | return s;
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| 233 | }
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| 234 |
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| 235 | int BIO_accept(int sock, char **ip_port)
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| 236 | {
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| 237 | BIO_ADDR res;
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| 238 | int ret = -1;
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| 239 |
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| 240 | ret = BIO_accept_ex(sock, &res, 0);
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| 241 | if (ret == (int)INVALID_SOCKET) {
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| 242 | if (BIO_sock_should_retry(ret)) {
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| 243 | ret = -2;
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| 244 | goto end;
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| 245 | }
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| 246 | SYSerr(SYS_F_ACCEPT, get_last_socket_error());
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| 247 | BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
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| 248 | goto end;
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| 249 | }
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| 250 |
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| 251 | if (ip_port != NULL) {
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| 252 | char *host = BIO_ADDR_hostname_string(&res, 1);
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| 253 | char *port = BIO_ADDR_service_string(&res, 1);
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| 254 | if (host != NULL && port != NULL)
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| 255 | *ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
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| 256 | else
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| 257 | *ip_port = NULL;
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| 258 |
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| 259 | if (*ip_port == NULL) {
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| 260 | BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
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| 261 | BIO_closesocket(ret);
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| 262 | ret = (int)INVALID_SOCKET;
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| 263 | } else {
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| 264 | strcpy(*ip_port, host);
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| 265 | strcat(*ip_port, ":");
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| 266 | strcat(*ip_port, port);
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| 267 | }
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| 268 | OPENSSL_free(host);
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| 269 | OPENSSL_free(port);
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| 270 | }
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| 271 |
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| 272 | end:
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| 273 | return ret;
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| 274 | }
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| 275 | # endif
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| 276 |
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| 277 | int BIO_set_tcp_ndelay(int s, int on)
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| 278 | {
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| 279 | int ret = 0;
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| 280 | # if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
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| 281 | int opt;
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| 282 |
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| 283 | # ifdef SOL_TCP
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| 284 | opt = SOL_TCP;
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| 285 | # else
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| 286 | # ifdef IPPROTO_TCP
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| 287 | opt = IPPROTO_TCP;
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| 288 | # endif
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| 289 | # endif
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| 290 |
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| 291 | ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
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| 292 | # endif
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| 293 | return (ret == 0);
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| 294 | }
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| 295 |
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| 296 | int BIO_socket_nbio(int s, int mode)
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| 297 | {
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| 298 | int ret = -1;
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| 299 | int l;
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| 300 |
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| 301 | l = mode;
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| 302 | # ifdef FIONBIO
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| 303 | l = mode;
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| 304 |
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| 305 | ret = BIO_socket_ioctl(s, FIONBIO, &l);
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| 306 | # elif defined(F_GETFL) && defined(F_SETFL) && (defined(O_NONBLOCK) || defined(FNDELAY))
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| 307 | /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
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| 308 |
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| 309 | l = fcntl(s, F_GETFL, 0);
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| 310 | if (l == -1) {
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| 311 | SYSerr(SYS_F_FCNTL, get_last_sys_error());
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| 312 | ret = -1;
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| 313 | } else {
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| 314 | # if defined(O_NONBLOCK)
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| 315 | l &= ~O_NONBLOCK;
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| 316 | # else
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| 317 | l &= ~FNDELAY; /* BSD4.x */
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| 318 | # endif
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| 319 | if (mode) {
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| 320 | # if defined(O_NONBLOCK)
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| 321 | l |= O_NONBLOCK;
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| 322 | # else
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| 323 | l |= FNDELAY; /* BSD4.x */
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| 324 | # endif
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| 325 | }
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| 326 | ret = fcntl(s, F_SETFL, l);
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| 327 |
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| 328 | if (ret < 0) {
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| 329 | SYSerr(SYS_F_FCNTL, get_last_sys_error());
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| 330 | }
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| 331 | }
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| 332 | # else
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| 333 | /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
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| 334 | BIOerr(BIO_F_BIO_SOCKET_NBIO, ERR_R_PASSED_INVALID_ARGUMENT);
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| 335 | # endif
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| 336 |
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| 337 | return (ret == 0);
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| 338 | }
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| 339 |
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| 340 | int BIO_sock_info(int sock,
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| 341 | enum BIO_sock_info_type type, union BIO_sock_info_u *info)
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| 342 | {
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| 343 | switch (type) {
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| 344 | case BIO_SOCK_INFO_ADDRESS:
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| 345 | {
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| 346 | socklen_t addr_len;
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| 347 | int ret = 0;
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| 348 | addr_len = sizeof(*info->addr);
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| 349 | ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
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| 350 | &addr_len);
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| 351 | if (ret == -1) {
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| 352 | SYSerr(SYS_F_GETSOCKNAME, get_last_socket_error());
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| 353 | BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_ERROR);
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| 354 | return 0;
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| 355 | }
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| 356 | if ((size_t)addr_len > sizeof(*info->addr)) {
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| 357 | BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
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| 358 | return 0;
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| 359 | }
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| 360 | }
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| 361 | break;
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| 362 | default:
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| 363 | BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_UNKNOWN_INFO_TYPE);
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| 364 | return 0;
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| 365 | }
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| 366 | return 1;
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| 367 | }
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| 368 |
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| 369 | #endif
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