File: [local] / src / usr.bin / openssl / s_socket.c (download)
Revision 1.11, Fri Jun 28 13:35:02 2019 UTC (4 years, 11 months ago) by deraadt
Branch: MAIN
CVS Tags: OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6 Changes since 1.10: +4 -4 lines
When system calls indicate an error they return -1, not some arbitrary
value < 0. errno is only updated in this case. Change all (most?)
callers of syscalls to follow this better, and let's see if this strictness
helps us in the future.
|
/* $OpenBSD: s_socket.c,v 1.11 2019/06/28 13:35:02 deraadt Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "apps.h"
#include <openssl/ssl.h>
#include "s_apps.h"
static int init_server(int *sock, int port, int type);
static int init_server_long(int *sock, int port, char *ip, int type);
static int do_accept(int acc_sock, int *sock, char **host);
int
init_client(int *sock, char *host, char *port, int type, int af)
{
struct addrinfo hints, *ai_top, *ai;
int i, s = -1;
memset(&hints, '\0', sizeof(hints));
hints.ai_family = af;
hints.ai_socktype = type;
if ((i = getaddrinfo(host, port, &hints, &ai_top)) != 0) {
BIO_printf(bio_err, "getaddrinfo: %s\n", gai_strerror(i));
return (0);
}
if (ai_top == NULL || ai_top->ai_addr == NULL) {
BIO_printf(bio_err, "getaddrinfo returned no addresses\n");
if (ai_top != NULL) {
freeaddrinfo(ai_top);
}
return (0);
}
for (ai = ai_top; ai != NULL; ai = ai->ai_next) {
s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (s == -1) {
continue;
}
if (type == SOCK_STREAM) {
i = 0;
i = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
(char *) &i, sizeof(i));
if (i == -1) {
perror("keepalive");
goto out;
}
}
if ((i = connect(s, ai->ai_addr, ai->ai_addrlen)) == 0) {
*sock = s;
freeaddrinfo(ai_top);
return (1);
}
close(s);
s = -1;
}
perror("connect");
out:
if (s != -1)
close(s);
freeaddrinfo(ai_top);
return (0);
}
int
do_server(int port, int type, int *ret,
int (*cb) (char *hostname, int s, unsigned char *context),
unsigned char *context)
{
int sock;
char *name = NULL;
int accept_socket = 0;
int i;
if (!init_server(&accept_socket, port, type))
return (0);
if (ret != NULL) {
*ret = accept_socket;
/* return(1); */
}
for (;;) {
if (type == SOCK_STREAM) {
if (do_accept(accept_socket, &sock, &name) == 0) {
shutdown(accept_socket, SHUT_RD);
close(accept_socket);
return (0);
}
} else
sock = accept_socket;
i = (*cb) (name, sock, context);
free(name);
if (type == SOCK_STREAM) {
shutdown(sock, SHUT_RDWR);
close(sock);
}
if (i < 0) {
shutdown(accept_socket, SHUT_RDWR);
close(accept_socket);
return (i);
}
}
}
static int
init_server_long(int *sock, int port, char *ip, int type)
{
int ret = 0;
struct sockaddr_in server;
int s = -1;
memset((char *) &server, 0, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons((unsigned short) port);
if (ip == NULL)
server.sin_addr.s_addr = INADDR_ANY;
else
memcpy(&server.sin_addr.s_addr, ip, 4);
if (type == SOCK_STREAM)
s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
else /* type == SOCK_DGRAM */
s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (s == -1)
goto err;
#if defined SOL_SOCKET && defined SO_REUSEADDR
{
int j = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
(void *) &j, sizeof j) == -1) {
perror("setsockopt");
goto err;
}
}
#endif
if (bind(s, (struct sockaddr *) & server, sizeof(server)) == -1) {
perror("bind");
goto err;
}
/* Make it 128 for linux */
if (type == SOCK_STREAM && listen(s, 128) == -1)
goto err;
*sock = s;
ret = 1;
err:
if ((ret == 0) && (s != -1)) {
shutdown(s, SHUT_RD);
close(s);
}
return (ret);
}
static int
init_server(int *sock, int port, int type)
{
return (init_server_long(sock, port, NULL, type));
}
static int
do_accept(int acc_sock, int *sock, char **host)
{
int ret;
struct hostent *h1, *h2;
static struct sockaddr_in from;
socklen_t len;
/* struct linger ling; */
redoit:
memset((char *) &from, 0, sizeof(from));
len = sizeof(from);
ret = accept(acc_sock, (struct sockaddr *) & from, &len);
if (ret == -1) {
if (errno == EINTR) {
/* check_timeout(); */
goto redoit;
}
fprintf(stderr, "errno=%d ", errno);
perror("accept");
return (0);
}
/*
ling.l_onoff=1;
ling.l_linger=0;
i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
if (i == -1) { perror("linger"); return(0); }
i=0;
i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
if (i == -1) { perror("keepalive"); return(0); }
*/
if (host == NULL)
goto end;
h1 = gethostbyaddr((char *) &from.sin_addr.s_addr,
sizeof(from.sin_addr.s_addr), AF_INET);
if (h1 == NULL) {
BIO_printf(bio_err, "bad gethostbyaddr\n");
*host = NULL;
/* return(0); */
} else {
if ((*host = strdup(h1->h_name)) == NULL) {
perror("strdup");
close(ret);
return (0);
}
h2 = gethostbyname(*host);
if (h2 == NULL) {
BIO_printf(bio_err, "gethostbyname failure\n");
close(ret);
free(*host);
return (0);
}
if (h2->h_addrtype != AF_INET) {
BIO_printf(bio_err, "gethostbyname addr is not AF_INET\n");
close(ret);
free(*host);
return (0);
}
}
end:
*sock = ret;
return (1);
}
int
extract_host_port(char *str, char **host_ptr, unsigned char *ip,
char **port_ptr)
{
char *h, *p;
h = str;
p = strrchr(str, '/'); /* IPv6 host/port */
if (p == NULL) {
p = strrchr(str, ':');
}
if (p == NULL) {
BIO_printf(bio_err, "no port defined\n");
return (0);
}
*(p++) = '\0';
if (host_ptr != NULL)
*host_ptr = h;
if (port_ptr != NULL && p != NULL && *p != '\0')
*port_ptr = p;
return (1);
}
int
extract_port(char *str, short *port_ptr)
{
int i;
const char *errstr;
struct servent *s;
i = strtonum(str, 1, 65535, &errstr);
if (!errstr) {
*port_ptr = (unsigned short) i;
} else {
s = getservbyname(str, "tcp");
if (s == NULL) {
BIO_printf(bio_err, "getservbyname failure for %s\n", str);
return (0);
}
*port_ptr = ntohs((unsigned short) s->s_port);
}
return (1);
}