2015-03-20 15:28:40 +00:00
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/*
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2022-03-15 23:35:22 +00:00
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* Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
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2015-03-20 15:28:40 +00:00
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*
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2018-09-13 19:18:07 +00:00
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* Licensed under the OpenSSL license (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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2000-01-10 06:22:05 +00:00
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*/
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2018-09-13 19:18:07 +00:00
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/* socket-related functions used by s_client and s_server */
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2000-01-10 06:22:05 +00:00
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <signal.h>
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2018-09-13 19:18:07 +00:00
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#include <openssl/opensslconf.h>
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2010-02-28 18:49:43 +00:00
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2015-03-20 15:28:40 +00:00
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/*
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* With IPv6, it looks like Digital has mixed up the proper order of
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* recursive header file inclusion, resulting in the compiler complaining
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* that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is
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* needed to have fileno() declared correctly... So let's define u_int
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*/
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2003-01-28 21:43:22 +00:00
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#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
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2015-03-20 15:28:40 +00:00
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# define __U_INT
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2000-01-10 06:22:05 +00:00
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typedef unsigned int u_int;
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#endif
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2006-07-29 19:10:21 +00:00
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#ifndef OPENSSL_NO_SOCK
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2018-09-13 19:18:07 +00:00
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# include "apps.h"
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# include "s_apps.h"
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# include "internal/sockets.h"
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2006-07-29 19:10:21 +00:00
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2018-09-13 19:18:07 +00:00
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# include <openssl/bio.h>
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# include <openssl/err.h>
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2006-07-29 19:10:21 +00:00
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2018-09-13 19:18:07 +00:00
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/* Keep track of our peer's address for the cookie callback */
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BIO_ADDR *ourpeer = NULL;
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2000-01-10 06:22:05 +00:00
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2018-09-13 19:18:07 +00:00
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/*
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* init_client - helper routine to set up socket communication
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* @sock: pointer to storage of resulting socket.
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* @host: the host name or path (for AF_UNIX) to connect to.
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* @port: the port to connect to (ignored for AF_UNIX).
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* @bindhost: source host or path (for AF_UNIX).
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* @bindport: source port (ignored for AF_UNIX).
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* @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
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* AF_UNSPEC
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* @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
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* @protocol: socket protocol, e.g. IPPROTO_TCP or IPPROTO_UDP (or 0 for any)
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*
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* This will create a socket and use it to connect to a host:port, or if
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* family == AF_UNIX, to the path found in host.
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*
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* If the host has more than one address, it will try them one by one until
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* a successful connection is established. The resulting socket will be
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* found in *sock on success, it will be given INVALID_SOCKET otherwise.
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*
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* Returns 1 on success, 0 on failure.
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*/
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int init_client(int *sock, const char *host, const char *port,
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const char *bindhost, const char *bindport,
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int family, int type, int protocol)
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2015-03-20 15:28:40 +00:00
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{
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2018-09-13 19:18:07 +00:00
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BIO_ADDRINFO *res = NULL;
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BIO_ADDRINFO *bindaddr = NULL;
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const BIO_ADDRINFO *ai = NULL;
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const BIO_ADDRINFO *bi = NULL;
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int found = 0;
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int ret;
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2015-03-20 15:28:40 +00:00
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2018-09-13 19:18:07 +00:00
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if (BIO_sock_init() != 1)
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return 0;
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2015-03-20 15:28:40 +00:00
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2018-09-13 19:18:07 +00:00
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ret = BIO_lookup_ex(host, port, BIO_LOOKUP_CLIENT, family, type, protocol,
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&res);
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if (ret == 0) {
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ERR_print_errors(bio_err);
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return 0;
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2015-03-20 15:28:40 +00:00
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}
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2006-07-29 19:10:21 +00:00
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2018-09-13 19:18:07 +00:00
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if (bindhost != NULL || bindport != NULL) {
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ret = BIO_lookup_ex(bindhost, bindport, BIO_LOOKUP_CLIENT,
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family, type, protocol, &bindaddr);
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if (ret == 0) {
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ERR_print_errors (bio_err);
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goto out;
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2015-03-20 15:28:40 +00:00
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}
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}
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2000-01-10 06:22:05 +00:00
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2018-09-13 19:18:07 +00:00
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ret = 0;
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for (ai = res; ai != NULL; ai = BIO_ADDRINFO_next(ai)) {
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/* Admittedly, these checks are quite paranoid, we should not get
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* anything in the BIO_ADDRINFO chain that we haven't
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* asked for. */
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OPENSSL_assert((family == AF_UNSPEC
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|| family == BIO_ADDRINFO_family(ai))
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&& (type == 0 || type == BIO_ADDRINFO_socktype(ai))
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&& (protocol == 0
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|| protocol == BIO_ADDRINFO_protocol(ai)));
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if (bindaddr != NULL) {
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for (bi = bindaddr; bi != NULL; bi = BIO_ADDRINFO_next(bi)) {
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if (BIO_ADDRINFO_family(bi) == BIO_ADDRINFO_family(ai))
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break;
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}
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if (bi == NULL)
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continue;
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++found;
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2015-03-20 15:28:40 +00:00
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}
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2000-01-10 06:22:05 +00:00
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2018-09-13 19:18:07 +00:00
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*sock = BIO_socket(BIO_ADDRINFO_family(ai), BIO_ADDRINFO_socktype(ai),
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BIO_ADDRINFO_protocol(ai), 0);
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if (*sock == INVALID_SOCKET) {
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/* Maybe the kernel doesn't support the socket family, even if
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* BIO_lookup() added it in the returned result...
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*/
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continue;
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}
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2015-03-20 15:28:40 +00:00
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2018-09-13 19:18:07 +00:00
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if (bi != NULL) {
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if (!BIO_bind(*sock, BIO_ADDRINFO_address(bi),
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BIO_SOCK_REUSEADDR)) {
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BIO_closesocket(*sock);
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*sock = INVALID_SOCKET;
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break;
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}
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}
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2015-03-20 15:28:40 +00:00
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2018-09-13 19:18:07 +00:00
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#ifndef OPENSSL_NO_SCTP
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if (protocol == IPPROTO_SCTP) {
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/*
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* For SCTP we have to set various options on the socket prior to
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* connecting. This is done automatically by BIO_new_dgram_sctp().
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* We don't actually need the created BIO though so we free it again
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* immediately.
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*/
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BIO *tmpbio = BIO_new_dgram_sctp(*sock, BIO_NOCLOSE);
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2015-03-20 15:28:40 +00:00
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2018-09-13 19:18:07 +00:00
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if (tmpbio == NULL) {
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ERR_print_errors(bio_err);
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return 0;
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2015-03-20 15:28:40 +00:00
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}
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2018-09-13 19:18:07 +00:00
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BIO_free(tmpbio);
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2015-03-20 15:28:40 +00:00
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}
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2018-09-13 19:18:07 +00:00
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#endif
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2000-01-10 06:22:05 +00:00
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2018-09-13 19:18:07 +00:00
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if (!BIO_connect(*sock, BIO_ADDRINFO_address(ai),
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2022-03-15 23:35:22 +00:00
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BIO_ADDRINFO_protocol(ai) == IPPROTO_TCP ? BIO_SOCK_NODELAY : 0)) {
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2018-09-13 19:18:07 +00:00
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BIO_closesocket(*sock);
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*sock = INVALID_SOCKET;
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continue;
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}
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2000-01-10 06:22:05 +00:00
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2018-09-13 19:18:07 +00:00
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/* Success, don't try any more addresses */
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break;
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2015-03-20 15:28:40 +00:00
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}
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2018-09-13 19:18:07 +00:00
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if (*sock == INVALID_SOCKET) {
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if (bindaddr != NULL && !found) {
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BIO_printf(bio_err, "Can't bind %saddress for %s%s%s\n",
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BIO_ADDRINFO_family(res) == AF_INET6 ? "IPv6 " :
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BIO_ADDRINFO_family(res) == AF_INET ? "IPv4 " :
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BIO_ADDRINFO_family(res) == AF_UNIX ? "unix " : "",
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bindhost != NULL ? bindhost : "",
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bindport != NULL ? ":" : "",
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bindport != NULL ? bindport : "");
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ERR_clear_error();
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ret = 0;
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}
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ERR_print_errors(bio_err);
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} else {
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/* Remove any stale errors from previous connection attempts */
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ERR_clear_error();
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ret = 1;
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2015-03-20 15:28:40 +00:00
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}
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2018-09-13 19:18:07 +00:00
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out:
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if (bindaddr != NULL) {
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BIO_ADDRINFO_free (bindaddr);
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2015-03-20 15:28:40 +00:00
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}
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2018-09-13 19:18:07 +00:00
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BIO_ADDRINFO_free(res);
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return ret;
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2015-03-20 15:28:40 +00:00
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}
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2000-01-10 06:22:05 +00:00
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2018-09-13 19:18:07 +00:00
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/*
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* do_server - helper routine to perform a server operation
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* @accept_sock: pointer to storage of resulting socket.
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* @host: the host name or path (for AF_UNIX) to connect to.
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* @port: the port to connect to (ignored for AF_UNIX).
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* @family: desired socket family, may be AF_INET, AF_INET6, AF_UNIX or
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* AF_UNSPEC
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* @type: socket type, must be SOCK_STREAM or SOCK_DGRAM
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* @cb: pointer to a function that receives the accepted socket and
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* should perform the communication with the connecting client.
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* @context: pointer to memory that's passed verbatim to the cb function.
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* @naccept: number of times an incoming connect should be accepted. If -1,
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* unlimited number.
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*
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* This will create a socket and use it to listen to a host:port, or if
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* family == AF_UNIX, to the path found in host, then start accepting
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* incoming connections and run cb on the resulting socket.
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*
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* 0 on failure, something other on success.
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*/
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int do_server(int *accept_sock, const char *host, const char *port,
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int family, int type, int protocol, do_server_cb cb,
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unsigned char *context, int naccept, BIO *bio_s_out)
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2015-03-20 15:28:40 +00:00
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{
|
2018-09-13 19:18:07 +00:00
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int asock = 0;
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int sock;
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int i;
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BIO_ADDRINFO *res = NULL;
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const BIO_ADDRINFO *next;
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int sock_family, sock_type, sock_protocol, sock_port;
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const BIO_ADDR *sock_address;
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2021-09-01 04:26:38 +00:00
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int sock_family_fallback = AF_UNSPEC;
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const BIO_ADDR *sock_address_fallback = NULL;
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2018-09-13 19:18:07 +00:00
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int sock_options = BIO_SOCK_REUSEADDR;
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int ret = 0;
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2015-03-20 15:28:40 +00:00
|
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2018-09-13 19:18:07 +00:00
|
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if (BIO_sock_init() != 1)
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return 0;
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2000-01-10 06:22:05 +00:00
|
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|
2018-09-13 19:18:07 +00:00
|
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if (!BIO_lookup_ex(host, port, BIO_LOOKUP_SERVER, family, type, protocol,
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&res)) {
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ERR_print_errors(bio_err);
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return 0;
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2015-03-20 15:28:40 +00:00
|
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}
|
|
|
|
|
2018-09-13 19:18:07 +00:00
|
|
|
/* Admittedly, these checks are quite paranoid, we should not get
|
|
|
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* anything in the BIO_ADDRINFO chain that we haven't asked for */
|
|
|
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OPENSSL_assert((family == AF_UNSPEC || family == BIO_ADDRINFO_family(res))
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|
|
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&& (type == 0 || type == BIO_ADDRINFO_socktype(res))
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|
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&& (protocol == 0 || protocol == BIO_ADDRINFO_protocol(res)));
|
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|
|
|
|
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sock_family = BIO_ADDRINFO_family(res);
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sock_type = BIO_ADDRINFO_socktype(res);
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sock_protocol = BIO_ADDRINFO_protocol(res);
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|
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sock_address = BIO_ADDRINFO_address(res);
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|
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next = BIO_ADDRINFO_next(res);
|
|
|
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if (sock_family == AF_INET6)
|
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|
|
sock_options |= BIO_SOCK_V6_ONLY;
|
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|
|
if (next != NULL
|
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|
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&& BIO_ADDRINFO_socktype(next) == sock_type
|
|
|
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&& BIO_ADDRINFO_protocol(next) == sock_protocol) {
|
|
|
|
if (sock_family == AF_INET
|
|
|
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&& BIO_ADDRINFO_family(next) == AF_INET6) {
|
2021-09-01 04:26:38 +00:00
|
|
|
/* In case AF_INET6 is returned but not supported by the
|
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|
|
* kernel, retry with the first detected address family */
|
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|
|
sock_family_fallback = sock_family;
|
|
|
|
sock_address_fallback = sock_address;
|
2018-09-13 19:18:07 +00:00
|
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|
sock_family = AF_INET6;
|
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|
|
sock_address = BIO_ADDRINFO_address(next);
|
|
|
|
} else if (sock_family == AF_INET6
|
|
|
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&& BIO_ADDRINFO_family(next) == AF_INET) {
|
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|
|
sock_options &= ~BIO_SOCK_V6_ONLY;
|
2015-03-20 15:28:40 +00:00
|
|
|
}
|
|
|
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}
|
2000-01-10 06:22:05 +00:00
|
|
|
|
2018-09-13 19:18:07 +00:00
|
|
|
asock = BIO_socket(sock_family, sock_type, sock_protocol, 0);
|
2021-09-01 04:26:38 +00:00
|
|
|
if (asock == INVALID_SOCKET && sock_family_fallback != AF_UNSPEC) {
|
|
|
|
asock = BIO_socket(sock_family_fallback, sock_type, sock_protocol, 0);
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|
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sock_address = sock_address_fallback;
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|
|
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}
|
2018-09-13 19:18:07 +00:00
|
|
|
if (asock == INVALID_SOCKET
|
|
|
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|| !BIO_listen(asock, sock_address, sock_options)) {
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|
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BIO_ADDRINFO_free(res);
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|
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ERR_print_errors(bio_err);
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|
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if (asock != INVALID_SOCKET)
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|
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BIO_closesocket(asock);
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|
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goto end;
|
2015-03-20 15:28:40 +00:00
|
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|
}
|
2000-01-10 06:22:05 +00:00
|
|
|
|
2018-09-13 19:18:07 +00:00
|
|
|
#ifndef OPENSSL_NO_SCTP
|
|
|
|
if (protocol == IPPROTO_SCTP) {
|
|
|
|
/*
|
|
|
|
* For SCTP we have to set various options on the socket prior to
|
|
|
|
* accepting. This is done automatically by BIO_new_dgram_sctp().
|
|
|
|
* We don't actually need the created BIO though so we free it again
|
|
|
|
* immediately.
|
|
|
|
*/
|
|
|
|
BIO *tmpbio = BIO_new_dgram_sctp(asock, BIO_NOCLOSE);
|
|
|
|
|
|
|
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if (tmpbio == NULL) {
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|
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BIO_closesocket(asock);
|
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|
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ERR_print_errors(bio_err);
|
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|
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goto end;
|
2015-03-20 15:28:40 +00:00
|
|
|
}
|
2018-09-13 19:18:07 +00:00
|
|
|
BIO_free(tmpbio);
|
2015-03-20 15:28:40 +00:00
|
|
|
}
|
2018-09-13 19:18:07 +00:00
|
|
|
#endif
|
2000-01-10 06:22:05 +00:00
|
|
|
|
2018-09-13 19:18:07 +00:00
|
|
|
sock_port = BIO_ADDR_rawport(sock_address);
|
|
|
|
|
|
|
|
BIO_ADDRINFO_free(res);
|
|
|
|
res = NULL;
|
|
|
|
|
|
|
|
if (sock_port == 0) {
|
|
|
|
/* dynamically allocated port, report which one */
|
|
|
|
union BIO_sock_info_u info;
|
|
|
|
char *hostname = NULL;
|
|
|
|
char *service = NULL;
|
|
|
|
int success = 0;
|
|
|
|
|
|
|
|
if ((info.addr = BIO_ADDR_new()) != NULL
|
|
|
|
&& BIO_sock_info(asock, BIO_SOCK_INFO_ADDRESS, &info)
|
|
|
|
&& (hostname = BIO_ADDR_hostname_string(info.addr, 1)) != NULL
|
|
|
|
&& (service = BIO_ADDR_service_string(info.addr, 1)) != NULL
|
|
|
|
&& BIO_printf(bio_s_out,
|
|
|
|
strchr(hostname, ':') == NULL
|
|
|
|
? /* IPv4 */ "ACCEPT %s:%s\n"
|
|
|
|
: /* IPv6 */ "ACCEPT [%s]:%s\n",
|
|
|
|
hostname, service) > 0)
|
|
|
|
success = 1;
|
|
|
|
|
|
|
|
(void)BIO_flush(bio_s_out);
|
|
|
|
OPENSSL_free(hostname);
|
|
|
|
OPENSSL_free(service);
|
|
|
|
BIO_ADDR_free(info.addr);
|
|
|
|
if (!success) {
|
|
|
|
BIO_closesocket(asock);
|
|
|
|
ERR_print_errors(bio_err);
|
|
|
|
goto end;
|
2015-03-20 15:28:40 +00:00
|
|
|
}
|
2018-09-13 19:18:07 +00:00
|
|
|
} else {
|
|
|
|
(void)BIO_printf(bio_s_out, "ACCEPT\n");
|
|
|
|
(void)BIO_flush(bio_s_out);
|
2015-03-20 15:28:40 +00:00
|
|
|
}
|
|
|
|
|
2018-09-13 19:18:07 +00:00
|
|
|
if (accept_sock != NULL)
|
|
|
|
*accept_sock = asock;
|
|
|
|
for (;;) {
|
|
|
|
char sink[64];
|
|
|
|
struct timeval timeout;
|
|
|
|
fd_set readfds;
|
2000-01-10 06:22:05 +00:00
|
|
|
|
2018-09-13 19:18:07 +00:00
|
|
|
if (type == SOCK_STREAM) {
|
|
|
|
BIO_ADDR_free(ourpeer);
|
|
|
|
ourpeer = BIO_ADDR_new();
|
|
|
|
if (ourpeer == NULL) {
|
|
|
|
BIO_closesocket(asock);
|
|
|
|
ERR_print_errors(bio_err);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
do {
|
|
|
|
sock = BIO_accept_ex(asock, ourpeer, 0);
|
|
|
|
} while (sock < 0 && BIO_sock_should_retry(sock));
|
|
|
|
if (sock < 0) {
|
|
|
|
ERR_print_errors(bio_err);
|
|
|
|
BIO_closesocket(asock);
|
2015-03-20 15:28:40 +00:00
|
|
|
break;
|
2018-09-13 19:18:07 +00:00
|
|
|
}
|
|
|
|
BIO_set_tcp_ndelay(sock, 1);
|
|
|
|
i = (*cb)(sock, type, protocol, context);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we ended with an alert being sent, but still with data in the
|
|
|
|
* network buffer to be read, then calling BIO_closesocket() will
|
|
|
|
* result in a TCP-RST being sent. On some platforms (notably
|
|
|
|
* Windows) then this will result in the peer immediately abandoning
|
|
|
|
* the connection including any buffered alert data before it has
|
|
|
|
* had a chance to be read. Shutting down the sending side first,
|
|
|
|
* and then closing the socket sends TCP-FIN first followed by
|
|
|
|
* TCP-RST. This seems to allow the peer to read the alert data.
|
|
|
|
*/
|
|
|
|
shutdown(sock, 1); /* SHUT_WR */
|
|
|
|
/*
|
|
|
|
* We just said we have nothing else to say, but it doesn't mean
|
|
|
|
* that the other side has nothing. It's even recommended to
|
|
|
|
* consume incoming data. [In testing context this ensures that
|
|
|
|
* alerts are passed on...]
|
|
|
|
*/
|
|
|
|
timeout.tv_sec = 0;
|
|
|
|
timeout.tv_usec = 500000; /* some extreme round-trip */
|
|
|
|
do {
|
|
|
|
FD_ZERO(&readfds);
|
|
|
|
openssl_fdset(sock, &readfds);
|
|
|
|
} while (select(sock + 1, &readfds, NULL, NULL, &timeout) > 0
|
|
|
|
&& readsocket(sock, sink, sizeof(sink)) > 0);
|
|
|
|
|
|
|
|
BIO_closesocket(sock);
|
|
|
|
} else {
|
|
|
|
i = (*cb)(asock, type, protocol, context);
|
2015-03-20 15:28:40 +00:00
|
|
|
}
|
2018-09-13 19:18:07 +00:00
|
|
|
|
|
|
|
if (naccept != -1)
|
|
|
|
naccept--;
|
|
|
|
if (i < 0 || naccept == 0) {
|
|
|
|
BIO_closesocket(asock);
|
|
|
|
ret = i;
|
|
|
|
break;
|
2015-03-20 15:28:40 +00:00
|
|
|
}
|
|
|
|
}
|
2018-09-13 19:18:07 +00:00
|
|
|
end:
|
|
|
|
# ifdef AF_UNIX
|
|
|
|
if (family == AF_UNIX)
|
|
|
|
unlink(host);
|
|
|
|
# endif
|
|
|
|
BIO_ADDR_free(ourpeer);
|
|
|
|
ourpeer = NULL;
|
|
|
|
return ret;
|
2015-03-20 15:28:40 +00:00
|
|
|
}
|
2006-07-29 19:10:21 +00:00
|
|
|
|
2018-09-13 19:18:07 +00:00
|
|
|
#endif /* OPENSSL_NO_SOCK */
|