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openssl/crypto/bio/b_sock.c

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/*
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "bio_local.h"
#ifndef OPENSSL_NO_SOCK
# define SOCKET_PROTOCOL IPPROTO_TCP
# ifdef SO_MAXCONN
# define MAX_LISTEN SO_MAXCONN
# elif defined(SOMAXCONN)
# define MAX_LISTEN SOMAXCONN
# else
# define MAX_LISTEN 32
# endif
# if defined(OPENSSL_SYS_WINDOWS)
static int wsa_init_done = 0;
# endif
# if OPENSSL_API_COMPAT < 0x10100000L
int BIO_get_host_ip(const char *str, unsigned char *ip)
{
BIO_ADDRINFO *res = NULL;
int ret = 0;
if (BIO_sock_init() != 1)
return 0; /* don't generate another error code here */
if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
size_t l;
if (BIO_ADDRINFO_family(res) != AF_INET) {
BIOerr(BIO_F_BIO_GET_HOST_IP,
BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
} else if (BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l)) {
/*
* Because only AF_INET addresses will reach this far, we can assert
* that l should be 4
*/
if (ossl_assert(l == 4))
ret = BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
}
BIO_ADDRINFO_free(res);
} else {
ERR_add_error_data(2, "host=", str);
}
return ret;
}
int BIO_get_port(const char *str, unsigned short *port_ptr)
{
BIO_ADDRINFO *res = NULL;
int ret = 0;
if (str == NULL) {
BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
return 0;
}
if (BIO_sock_init() != 1)
return 0; /* don't generate another error code here */
if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
if (BIO_ADDRINFO_family(res) != AF_INET) {
BIOerr(BIO_F_BIO_GET_PORT,
BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
} else {
*port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
ret = 1;
}
BIO_ADDRINFO_free(res);
} else {
ERR_add_error_data(2, "host=", str);
}
return ret;
}
# endif
int BIO_sock_error(int sock)
{
int j = 0, i;
socklen_t size = sizeof(j);
/*
* Note: under Windows the third parameter is of type (char *) whereas
* under other systems it is (void *) if you don't have a cast it will
* choke the compiler: if you do have a cast then you can either go for
* (char *) or (void *).
*/
i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, &size);
if (i < 0)
return get_last_socket_error();
else
return j;
}
# if OPENSSL_API_COMPAT < 0x10100000L
struct hostent *BIO_gethostbyname(const char *name)
{
/*
* Caching gethostbyname() results forever is wrong, so we have to let
* the true gethostbyname() worry about this
*/
return gethostbyname(name);
}
# endif
int BIO_sock_init(void)
{
# ifdef OPENSSL_SYS_WINDOWS
static struct WSAData wsa_state;
if (!wsa_init_done) {
int err;
wsa_init_done = 1;
memset(&wsa_state, 0, sizeof(wsa_state));
/*
* Not making wsa_state available to the rest of the code is formally
* wrong. But the structures we use are [believed to be] invariable
* among Winsock DLLs, while API availability is [expected to be]
* probed at run-time with DSO_global_lookup.
*/
if (WSAStartup(0x0202, &wsa_state) != 0) {
err = WSAGetLastError();
SYSerr(SYS_F_WSASTARTUP, err);
BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
return -1;
}
}
# endif /* OPENSSL_SYS_WINDOWS */
# ifdef WATT32
extern int _watt_do_exit;
_watt_do_exit = 0; /* don't make sock_init() call exit() */
if (sock_init())
return -1;
# endif
return 1;
}
void bio_sock_cleanup_int(void)
{
# ifdef OPENSSL_SYS_WINDOWS
if (wsa_init_done) {
wsa_init_done = 0;
WSACleanup();
}
# endif
}
int BIO_socket_ioctl(int fd, long type, void *arg)
{
int i;
# ifdef __DJGPP__
i = ioctlsocket(fd, type, (char *)arg);
# else
# if defined(OPENSSL_SYS_VMS)
/*-
* 2011-02-18 SMS.
* VMS ioctl() can't tolerate a 64-bit "void *arg", but we
* observe that all the consumers pass in an "unsigned long *",
* so we arrange a local copy with a short pointer, and use
* that, instead.
*/
# if __INITIAL_POINTER_SIZE == 64
# define ARG arg_32p
# pragma pointer_size save
# pragma pointer_size 32
unsigned long arg_32;
unsigned long *arg_32p;
# pragma pointer_size restore
arg_32p = &arg_32;
arg_32 = *((unsigned long *)arg);
# else /* __INITIAL_POINTER_SIZE == 64 */
# define ARG arg
# endif /* __INITIAL_POINTER_SIZE == 64 [else] */
# else /* defined(OPENSSL_SYS_VMS) */
# define ARG arg
# endif /* defined(OPENSSL_SYS_VMS) [else] */
i = ioctlsocket(fd, type, ARG);
# endif /* __DJGPP__ */
if (i < 0)
SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error());
return i;
}
# if OPENSSL_API_COMPAT < 0x10100000L
int BIO_get_accept_socket(char *host, int bind_mode)
{
int s = INVALID_SOCKET;
char *h = NULL, *p = NULL;
BIO_ADDRINFO *res = NULL;
if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
return INVALID_SOCKET;
if (BIO_sock_init() != 1)
return INVALID_SOCKET;
if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
goto err;
if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
s = INVALID_SOCKET;
goto err;
}
if (!BIO_listen(s, BIO_ADDRINFO_address(res),
bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
BIO_closesocket(s);
s = INVALID_SOCKET;
}
err:
BIO_ADDRINFO_free(res);
OPENSSL_free(h);
OPENSSL_free(p);
return s;
}
int BIO_accept(int sock, char **ip_port)
{
BIO_ADDR res;
int ret = -1;
ret = BIO_accept_ex(sock, &res, 0);
if (ret == (int)INVALID_SOCKET) {
if (BIO_sock_should_retry(ret)) {
ret = -2;
goto end;
}
SYSerr(SYS_F_ACCEPT, get_last_socket_error());
BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
goto end;
}
if (ip_port != NULL) {
char *host = BIO_ADDR_hostname_string(&res, 1);
char *port = BIO_ADDR_service_string(&res, 1);
if (host != NULL && port != NULL)
*ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
else
*ip_port = NULL;
if (*ip_port == NULL) {
BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
BIO_closesocket(ret);
ret = (int)INVALID_SOCKET;
} else {
strcpy(*ip_port, host);
strcat(*ip_port, ":");
strcat(*ip_port, port);
}
OPENSSL_free(host);
OPENSSL_free(port);
}
end:
return ret;
}
# endif
int BIO_set_tcp_ndelay(int s, int on)
{
int ret = 0;
# if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
int opt;
# ifdef SOL_TCP
opt = SOL_TCP;
# else
# ifdef IPPROTO_TCP
opt = IPPROTO_TCP;
# endif
# endif
ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
# endif
return (ret == 0);
}
int BIO_socket_nbio(int s, int mode)
{
int ret = -1;
int l;
l = mode;
# ifdef FIONBIO
l = mode;
ret = BIO_socket_ioctl(s, FIONBIO, &l);
# elif defined(F_GETFL) && defined(F_SETFL) && (defined(O_NONBLOCK) || defined(FNDELAY))
/* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
l = fcntl(s, F_GETFL, 0);
if (l == -1) {
SYSerr(SYS_F_FCNTL, get_last_sys_error());
ret = -1;
} else {
# if defined(O_NONBLOCK)
l &= ~O_NONBLOCK;
# else
l &= ~FNDELAY; /* BSD4.x */
# endif
if (mode) {
# if defined(O_NONBLOCK)
l |= O_NONBLOCK;
# else
l |= FNDELAY; /* BSD4.x */
# endif
}
ret = fcntl(s, F_SETFL, l);
if (ret < 0) {
SYSerr(SYS_F_FCNTL, get_last_sys_error());
}
}
# else
/* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
BIOerr(BIO_F_BIO_SOCKET_NBIO, ERR_R_PASSED_INVALID_ARGUMENT);
# endif
return (ret == 0);
}
int BIO_sock_info(int sock,
enum BIO_sock_info_type type, union BIO_sock_info_u *info)
{
switch (type) {
case BIO_SOCK_INFO_ADDRESS:
{
socklen_t addr_len;
int ret = 0;
addr_len = sizeof(*info->addr);
ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
&addr_len);
if (ret == -1) {
SYSerr(SYS_F_GETSOCKNAME, get_last_socket_error());
BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_ERROR);
return 0;
}
if ((size_t)addr_len > sizeof(*info->addr)) {
BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
return 0;
}
}
break;
default:
BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_UNKNOWN_INFO_TYPE);
return 0;
}
return 1;
}
#endif
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