455 lines
12 KiB
C
455 lines
12 KiB
C
/*
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* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "bio_local.h"
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#ifndef OPENSSL_NO_SOCK
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# define SOCKET_PROTOCOL IPPROTO_TCP
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# ifdef SO_MAXCONN
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# define MAX_LISTEN SO_MAXCONN
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# elif defined(SOMAXCONN)
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# define MAX_LISTEN SOMAXCONN
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# else
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# define MAX_LISTEN 32
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# endif
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# if defined(OPENSSL_SYS_WINDOWS)
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static int wsa_init_done = 0;
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# endif
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# if defined __TANDEM
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# include <unistd.h>
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# include <sys/time.h> /* select */
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# if defined(OPENSSL_TANDEM_FLOSS)
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# include <floss.h(floss_select)>
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# endif
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# elif defined _WIN32
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# include <winsock.h> /* for type fd_set */
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# else
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# include <unistd.h>
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# if defined __VMS
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# include <sys/socket.h>
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# elif defined _HPUX_SOURCE
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# include <sys/time.h>
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# else
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# include <sys/select.h>
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# endif
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# endif
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# ifndef OPENSSL_NO_DEPRECATED_1_1_0
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int BIO_get_host_ip(const char *str, unsigned char *ip)
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{
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BIO_ADDRINFO *res = NULL;
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int ret = 0;
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if (BIO_sock_init() != 1)
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return 0; /* don't generate another error code here */
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if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
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size_t l;
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if (BIO_ADDRINFO_family(res) != AF_INET) {
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ERR_raise(ERR_LIB_BIO, BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
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} else if (BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l)) {
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/*
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* Because only AF_INET addresses will reach this far, we can assert
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* that l should be 4
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*/
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if (ossl_assert(l == 4))
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ret = BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
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}
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BIO_ADDRINFO_free(res);
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} else {
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ERR_add_error_data(2, "host=", str);
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}
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return ret;
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}
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int BIO_get_port(const char *str, unsigned short *port_ptr)
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{
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BIO_ADDRINFO *res = NULL;
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int ret = 0;
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if (str == NULL) {
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ERR_raise(ERR_LIB_BIO, BIO_R_NO_PORT_DEFINED);
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return 0;
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}
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if (BIO_sock_init() != 1)
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return 0; /* don't generate another error code here */
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if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
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if (BIO_ADDRINFO_family(res) != AF_INET) {
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ERR_raise(ERR_LIB_BIO, BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
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} else {
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*port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
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ret = 1;
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}
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BIO_ADDRINFO_free(res);
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} else {
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ERR_add_error_data(2, "host=", str);
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}
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return ret;
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}
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# endif
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int BIO_sock_error(int sock)
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{
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int j = 0, i;
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socklen_t size = sizeof(j);
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/*
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* Note: under Windows the third parameter is of type (char *) whereas
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* under other systems it is (void *) if you don't have a cast it will
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* choke the compiler: if you do have a cast then you can either go for
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* (char *) or (void *).
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*/
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i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, &size);
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if (i < 0)
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return get_last_socket_error();
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else
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return j;
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}
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# ifndef OPENSSL_NO_DEPRECATED_1_1_0
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struct hostent *BIO_gethostbyname(const char *name)
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{
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/*
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* Caching gethostbyname() results forever is wrong, so we have to let
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* the true gethostbyname() worry about this
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*/
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return gethostbyname(name);
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}
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# endif
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# ifdef BIO_HAVE_WSAMSG
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LPFN_WSARECVMSG bio_WSARecvMsg;
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LPFN_WSASENDMSG bio_WSASendMsg;
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# endif
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int BIO_sock_init(void)
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{
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# ifdef OPENSSL_SYS_WINDOWS
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static struct WSAData wsa_state;
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if (!wsa_init_done) {
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wsa_init_done = 1;
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memset(&wsa_state, 0, sizeof(wsa_state));
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/*
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* Not making wsa_state available to the rest of the code is formally
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* wrong. But the structures we use are [believed to be] invariable
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* among Winsock DLLs, while API availability is [expected to be]
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* probed at run-time with DSO_global_lookup.
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*/
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if (WSAStartup(0x0202, &wsa_state) != 0) {
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ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
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"calling wsastartup()");
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ERR_raise(ERR_LIB_BIO, BIO_R_WSASTARTUP);
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return -1;
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}
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/*
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* On Windows, some socket functions are not exposed as a prototype.
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* Instead, their function pointers must be loaded via this elaborate
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* process...
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*/
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# ifdef BIO_HAVE_WSAMSG
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{
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GUID id_WSARecvMsg = WSAID_WSARECVMSG;
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GUID id_WSASendMsg = WSAID_WSASENDMSG;
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DWORD len_out = 0;
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SOCKET s;
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s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (s != INVALID_SOCKET) {
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if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER,
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&id_WSARecvMsg, sizeof(id_WSARecvMsg),
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&bio_WSARecvMsg, sizeof(bio_WSARecvMsg),
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&len_out, NULL, NULL) != 0
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|| len_out != sizeof(bio_WSARecvMsg))
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bio_WSARecvMsg = NULL;
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if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER,
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&id_WSASendMsg, sizeof(id_WSASendMsg),
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&bio_WSASendMsg, sizeof(bio_WSASendMsg),
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&len_out, NULL, NULL) != 0
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|| len_out != sizeof(bio_WSASendMsg))
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bio_WSASendMsg = NULL;
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closesocket(s);
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}
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}
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# endif
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}
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# endif /* OPENSSL_SYS_WINDOWS */
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# ifdef WATT32
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extern int _watt_do_exit;
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_watt_do_exit = 0; /* don't make sock_init() call exit() */
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if (sock_init())
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return -1;
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# endif
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return 1;
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}
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void bio_sock_cleanup_int(void)
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{
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# ifdef OPENSSL_SYS_WINDOWS
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if (wsa_init_done) {
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wsa_init_done = 0;
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WSACleanup();
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}
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# endif
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}
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int BIO_socket_ioctl(int fd, long type, void *arg)
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{
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int i;
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# ifdef __DJGPP__
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i = ioctlsocket(fd, type, (char *)arg);
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# else
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# if defined(OPENSSL_SYS_VMS)
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/*-
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* 2011-02-18 SMS.
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* VMS ioctl() can't tolerate a 64-bit "void *arg", but we
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* observe that all the consumers pass in an "unsigned long *",
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* so we arrange a local copy with a short pointer, and use
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* that, instead.
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*/
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# if __INITIAL_POINTER_SIZE == 64
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# define ARG arg_32p
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# pragma pointer_size save
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# pragma pointer_size 32
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unsigned long arg_32;
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unsigned long *arg_32p;
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# pragma pointer_size restore
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arg_32p = &arg_32;
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arg_32 = *((unsigned long *)arg);
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# else /* __INITIAL_POINTER_SIZE == 64 */
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# define ARG arg
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# endif /* __INITIAL_POINTER_SIZE == 64 [else] */
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# else /* defined(OPENSSL_SYS_VMS) */
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# define ARG arg
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# endif /* defined(OPENSSL_SYS_VMS) [else] */
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i = ioctlsocket(fd, type, ARG);
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# endif /* __DJGPP__ */
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if (i < 0)
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ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
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"calling ioctlsocket()");
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return i;
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}
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# ifndef OPENSSL_NO_DEPRECATED_1_1_0
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int BIO_get_accept_socket(char *host, int bind_mode)
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{
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int s = INVALID_SOCKET;
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char *h = NULL, *p = NULL;
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BIO_ADDRINFO *res = NULL;
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if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
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return INVALID_SOCKET;
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if (BIO_sock_init() != 1)
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return INVALID_SOCKET;
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if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
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goto err;
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if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
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BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
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s = INVALID_SOCKET;
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goto err;
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}
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if (!BIO_listen(s, BIO_ADDRINFO_address(res),
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bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
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BIO_closesocket(s);
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s = INVALID_SOCKET;
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}
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err:
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BIO_ADDRINFO_free(res);
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OPENSSL_free(h);
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OPENSSL_free(p);
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return s;
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}
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int BIO_accept(int sock, char **ip_port)
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{
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BIO_ADDR res;
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int ret = -1;
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ret = BIO_accept_ex(sock, &res, 0);
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if (ret == (int)INVALID_SOCKET) {
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if (BIO_sock_should_retry(ret)) {
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ret = -2;
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goto end;
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}
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ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
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"calling accept()");
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ERR_raise(ERR_LIB_BIO, BIO_R_ACCEPT_ERROR);
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goto end;
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}
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if (ip_port != NULL) {
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char *host = BIO_ADDR_hostname_string(&res, 1);
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char *port = BIO_ADDR_service_string(&res, 1);
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if (host != NULL && port != NULL) {
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*ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
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} else {
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*ip_port = NULL;
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ERR_raise(ERR_LIB_BIO, ERR_R_BIO_LIB);
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}
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if (*ip_port == NULL) {
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BIO_closesocket(ret);
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ret = (int)INVALID_SOCKET;
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} else {
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strcpy(*ip_port, host);
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strcat(*ip_port, ":");
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strcat(*ip_port, port);
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}
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OPENSSL_free(host);
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OPENSSL_free(port);
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}
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end:
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return ret;
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}
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# endif
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int BIO_set_tcp_ndelay(int s, int on)
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{
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int ret = 0;
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# if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
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int opt;
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# ifdef SOL_TCP
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opt = SOL_TCP;
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# else
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# ifdef IPPROTO_TCP
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opt = IPPROTO_TCP;
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# endif
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# endif
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ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
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# endif
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return (ret == 0);
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}
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int BIO_socket_nbio(int s, int mode)
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{
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int ret = -1;
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int l;
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l = mode;
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# ifdef FIONBIO
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l = mode;
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ret = BIO_socket_ioctl(s, FIONBIO, &l);
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# elif defined(F_GETFL) && defined(F_SETFL) && (defined(O_NONBLOCK) || defined(FNDELAY))
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/* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
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l = fcntl(s, F_GETFL, 0);
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if (l == -1) {
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ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
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"calling fcntl()");
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ret = -1;
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} else {
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# if defined(O_NONBLOCK)
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l &= ~O_NONBLOCK;
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# else
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l &= ~FNDELAY; /* BSD4.x */
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# endif
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if (mode) {
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# if defined(O_NONBLOCK)
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l |= O_NONBLOCK;
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# else
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l |= FNDELAY; /* BSD4.x */
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# endif
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}
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ret = fcntl(s, F_SETFL, l);
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if (ret < 0) {
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ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
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"calling fcntl()");
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}
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}
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# else
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/* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
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ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_INVALID_ARGUMENT);
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# endif
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return (ret == 0);
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}
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int BIO_sock_info(int sock,
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enum BIO_sock_info_type type, union BIO_sock_info_u *info)
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{
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switch (type) {
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case BIO_SOCK_INFO_ADDRESS:
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{
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socklen_t addr_len;
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int ret = 0;
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addr_len = sizeof(*info->addr);
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ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
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&addr_len);
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if (ret == -1) {
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ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
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"calling getsockname()");
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ERR_raise(ERR_LIB_BIO, BIO_R_GETSOCKNAME_ERROR);
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return 0;
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}
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if ((size_t)addr_len > sizeof(*info->addr)) {
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ERR_raise(ERR_LIB_BIO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
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return 0;
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}
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}
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break;
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default:
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ERR_raise(ERR_LIB_BIO, BIO_R_UNKNOWN_INFO_TYPE);
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return 0;
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}
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return 1;
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}
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/*
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* Wait on fd at most until max_time; succeed immediately if max_time == 0.
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* If for_read == 0 then assume to wait for writing, else wait for reading.
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* Returns -1 on error, 0 on timeout, and 1 on success.
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*/
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int BIO_socket_wait(int fd, int for_read, time_t max_time)
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{
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fd_set confds;
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struct timeval tv;
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time_t now;
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if (fd < 0 || fd >= FD_SETSIZE)
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return -1;
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if (max_time == 0)
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return 1;
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now = time(NULL);
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if (max_time < now)
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return 0;
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FD_ZERO(&confds);
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openssl_fdset(fd, &confds);
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tv.tv_usec = 0;
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tv.tv_sec = (long)(max_time - now); /* might overflow */
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return select(fd + 1, for_read ? &confds : NULL,
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for_read ? NULL : &confds, NULL, &tv);
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}
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#endif /* !defined(OPENSSL_NO_SOCK) */
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