328 lines
8.4 KiB
C
328 lines
8.4 KiB
C
/* $OpenBSD: s_socket.c,v 1.13 2021/12/06 11:06:58 tb Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include <netdb.h>
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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 <unistd.h>
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#include "apps.h"
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#include <openssl/ssl.h>
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#include "s_apps.h"
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static int init_server(int *sock, int port, int type);
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static int init_server_long(int *sock, int port, char *ip, int type);
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static int do_accept(int acc_sock, int *sock);
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int
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init_client(int *sock, char *host, char *port, int type, int af)
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{
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struct addrinfo hints, *ai_top, *ai;
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int i, s = -1;
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memset(&hints, '\0', sizeof(hints));
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hints.ai_family = af;
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hints.ai_socktype = type;
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if ((i = getaddrinfo(host, port, &hints, &ai_top)) != 0) {
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BIO_printf(bio_err, "getaddrinfo: %s\n", gai_strerror(i));
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return (0);
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}
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if (ai_top == NULL || ai_top->ai_addr == NULL) {
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BIO_printf(bio_err, "getaddrinfo returned no addresses\n");
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if (ai_top != NULL) {
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freeaddrinfo(ai_top);
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}
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return (0);
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}
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for (ai = ai_top; ai != NULL; ai = ai->ai_next) {
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s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
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if (s == -1) {
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continue;
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}
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if (type == SOCK_STREAM) {
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i = 0;
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i = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
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(char *) &i, sizeof(i));
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if (i == -1) {
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perror("keepalive");
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goto out;
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}
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}
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if ((i = connect(s, ai->ai_addr, ai->ai_addrlen)) == 0) {
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*sock = s;
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freeaddrinfo(ai_top);
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return (1);
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}
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close(s);
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s = -1;
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}
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perror("connect");
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out:
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if (s != -1)
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close(s);
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freeaddrinfo(ai_top);
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return (0);
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}
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int
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do_server(int port, int type, int *ret,
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int (*cb)(int s, unsigned char *context),
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unsigned char *context, int naccept)
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{
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int sock;
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int accept_socket = 0;
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int i;
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if (!init_server(&accept_socket, port, type))
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return (0);
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if (ret != NULL) {
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*ret = accept_socket;
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/* return(1); */
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}
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for (;;) {
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if (type == SOCK_STREAM) {
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if (do_accept(accept_socket, &sock) == 0) {
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shutdown(accept_socket, SHUT_RD);
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close(accept_socket);
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return (0);
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}
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} else
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sock = accept_socket;
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i = cb(sock, context);
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if (type == SOCK_STREAM) {
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shutdown(sock, SHUT_RDWR);
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close(sock);
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}
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if (naccept != -1)
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naccept--;
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if (i < 0 || naccept == 0) {
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shutdown(accept_socket, SHUT_RDWR);
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close(accept_socket);
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return (i);
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}
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}
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}
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static int
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init_server_long(int *sock, int port, char *ip, int type)
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{
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int ret = 0;
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struct sockaddr_in server;
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int s = -1;
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memset((char *) &server, 0, sizeof(server));
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server.sin_family = AF_INET;
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server.sin_port = htons((unsigned short) port);
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if (ip == NULL)
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server.sin_addr.s_addr = INADDR_ANY;
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else
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memcpy(&server.sin_addr.s_addr, ip, 4);
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if (type == SOCK_STREAM)
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s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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else /* type == SOCK_DGRAM */
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s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (s == -1)
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goto err;
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#if defined SOL_SOCKET && defined SO_REUSEADDR
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{
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int j = 1;
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if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
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(void *) &j, sizeof j) == -1) {
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perror("setsockopt");
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goto err;
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}
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}
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#endif
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if (bind(s, (struct sockaddr *) & server, sizeof(server)) == -1) {
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perror("bind");
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goto err;
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}
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/* Make it 128 for linux */
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if (type == SOCK_STREAM && listen(s, 128) == -1)
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goto err;
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*sock = s;
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ret = 1;
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err:
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if ((ret == 0) && (s != -1)) {
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shutdown(s, SHUT_RD);
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close(s);
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}
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return (ret);
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}
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static int
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init_server(int *sock, int port, int type)
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{
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return (init_server_long(sock, port, NULL, type));
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}
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static int
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do_accept(int acc_sock, int *sock)
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{
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struct hostent *h1, *h2;
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static struct sockaddr_in from;
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socklen_t len;
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char *host = NULL;
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int ret;
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redoit:
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memset((char *) &from, 0, sizeof(from));
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len = sizeof(from);
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ret = accept(acc_sock, (struct sockaddr *) & from, &len);
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if (ret == -1) {
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if (errno == EINTR) {
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/* check_timeout(); */
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goto redoit;
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}
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fprintf(stderr, "errno=%d ", errno);
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perror("accept");
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return (0);
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}
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h1 = gethostbyaddr((char *) &from.sin_addr.s_addr,
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sizeof(from.sin_addr.s_addr), AF_INET);
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if (h1 == NULL) {
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BIO_printf(bio_err, "bad gethostbyaddr\n");
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} else {
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if ((host = strdup(h1->h_name)) == NULL) {
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perror("strdup");
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close(ret);
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return (0);
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}
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h2 = gethostbyname(host);
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if (h2 == NULL) {
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BIO_printf(bio_err, "gethostbyname failure\n");
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close(ret);
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free(host);
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return (0);
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}
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if (h2->h_addrtype != AF_INET) {
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BIO_printf(bio_err, "gethostbyname addr is not AF_INET\n");
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close(ret);
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free(host);
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return (0);
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}
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}
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free(host);
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*sock = ret;
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return (1);
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}
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int
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extract_host_port(char *str, char **host_ptr, unsigned char *ip,
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char **port_ptr)
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{
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char *h, *p;
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h = str;
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p = strrchr(str, '/'); /* IPv6 host/port */
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if (p == NULL) {
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p = strrchr(str, ':');
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}
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if (p == NULL) {
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BIO_printf(bio_err, "no port defined\n");
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return (0);
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}
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*(p++) = '\0';
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if (host_ptr != NULL)
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*host_ptr = h;
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if (port_ptr != NULL && p != NULL && *p != '\0')
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*port_ptr = p;
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return (1);
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}
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int
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extract_port(char *str, short *port_ptr)
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{
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int i;
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const char *errstr;
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struct servent *s;
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i = strtonum(str, 1, 65535, &errstr);
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if (!errstr) {
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*port_ptr = (unsigned short) i;
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} else {
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s = getservbyname(str, "tcp");
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if (s == NULL) {
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BIO_printf(bio_err, "getservbyname failure for %s\n", str);
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return (0);
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}
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*port_ptr = ntohs((unsigned short) s->s_port);
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}
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return (1);
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}
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