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084f9a7046
Address some style issues in the demos and modernise the C. Fix the exit/return from main handling. Reviewed-by: Andy Polyakov <appro@openssl.org> (Merged from https://github.com/openssl/openssl/pull/3914)
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*
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* Copyright 2015-2017 The OpenSSL Project Authors. All Rights Reserved.
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*
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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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*/
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/*
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* A minimal TLS server it ses SSL_CTX_config and a configuration file to
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* set most server parameters.
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*/
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#include <stdio.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <openssl/err.h>
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#include <openssl/ssl.h>
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#include <openssl/conf.h>
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int main(int argc, char *argv[])
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{
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unsigned char buf[512];
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char *port = "*:4433";
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BIO *in = NULL;
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BIO *ssl_bio, *tmp;
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SSL_CTX *ctx;
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int ret = EXIT_FAILURE, i;
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ctx = SSL_CTX_new(TLS_server_method());
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if (CONF_modules_load_file("cmod.cnf", "testapp", 0) <= 0) {
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fprintf(stderr, "Error processing config file\n");
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goto err;
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}
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if (SSL_CTX_config(ctx, "server") == 0) {
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fprintf(stderr, "Error configuring server.\n");
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goto err;
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}
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/* Setup server side SSL bio */
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ssl_bio = BIO_new_ssl(ctx, 0);
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if ((in = BIO_new_accept(port)) == NULL)
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goto err;
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/*
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* This means that when a new connection is accepted on 'in', The ssl_bio
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* will be 'duplicated' and have the new socket BIO push into it.
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* Basically it means the SSL BIO will be automatically setup
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*/
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BIO_set_accept_bios(in, ssl_bio);
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again:
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/*
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* The first call will setup the accept socket, and the second will get a
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* socket. In this loop, the first actual accept will occur in the
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* BIO_read() function.
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*/
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if (BIO_do_accept(in) <= 0)
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goto err;
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for (;;) {
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i = BIO_read(in, buf, sizeof(buf));
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if (i == 0) {
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/*
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* If we have finished, remove the underlying BIO stack so the
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* next time we call any function for this BIO, it will attempt
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* to do an accept
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*/
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printf("Done\n");
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tmp = BIO_pop(in);
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BIO_free_all(tmp);
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goto again;
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}
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if (i < 0) {
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if (BIO_should_retry(in))
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continue;
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goto err;
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}
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fwrite(buf, 1, i, stdout);
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fflush(stdout);
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}
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ret = EXIT_SUCCESS;
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err:
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if (ret != EXIT_SUCCESS)
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ERR_print_errors_fp(stderr);
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BIO_free(in);
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return ret;
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}
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