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openssl/crypto/bio/b_sock.c
Rich Salz 16f8d4ebf0 memset, memcpy, sizeof consistency fixes 
Just as with the OPENSSL_malloc calls, consistently use sizeof(*ptr)
for memset and memcpy.  Remove needless casts for those functions.
For memset, replace alternative forms of zero with 0.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-05-05 22:18:59 -04:00

737 lines
22 KiB
C
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/* crypto/bio/b_sock.c */
/* 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 <stdio.h>
#include <stdlib.h>
#include <errno.h>
#define USE_SOCKETS
#include "cryptlib.h"
#include <openssl/bio.h>
#if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
# include <netdb.h>
# if defined(NETWARE_CLIB)
# include <sys/ioctl.h>
NETDB_DEFINE_CONTEXT
# endif
#endif
#ifndef OPENSSL_NO_SOCK
# include <openssl/dso.h>
# 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) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
static int wsa_init_done = 0;
# endif
/*
* WSAAPI specifier is required to make indirect calls to run-time
* linked WinSock 2 functions used in this module, to be specific
* [get|free]addrinfo and getnameinfo. This is because WinSock uses
* uses non-C calling convention, __stdcall vs. __cdecl, on x86
* Windows. On non-WinSock platforms WSAAPI needs to be void.
*/
# ifndef WSAAPI
# define WSAAPI
# endif
static int get_ip(const char *str, unsigned char *ip);
int BIO_get_host_ip(const char *str, unsigned char *ip)
{
int i;
int err = 1;
int locked = 0;
struct hostent *he;
i = get_ip(str, ip);
if (i < 0) {
BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_INVALID_IP_ADDRESS);
goto err;
}
/*
* At this point, we have something that is most probably correct in some
* way, so let's init the socket.
*/
if (BIO_sock_init() != 1)
return 0; /* don't generate another error code here */
/*
* If the string actually contained an IP address, we need not do
* anything more
*/
if (i > 0)
return (1);
/* do a gethostbyname */
CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
locked = 1;
he = BIO_gethostbyname(str);
if (he == NULL) {
BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_BAD_HOSTNAME_LOOKUP);
goto err;
}
if (he->h_addrtype != AF_INET) {
BIOerr(BIO_F_BIO_GET_HOST_IP,
BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
goto err;
}
for (i = 0; i < 4; i++)
ip[i] = he->h_addr_list[0][i];
err = 0;
err:
if (locked)
CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
if (err) {
ERR_add_error_data(2, "host=", str);
return 0;
} else
return 1;
}
int BIO_get_port(const char *str, unsigned short *port_ptr)
{
int i;
struct servent *s;
if (str == NULL) {
BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
return (0);
}
i = atoi(str);
if (i != 0)
*port_ptr = (unsigned short)i;
else {
CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
/*
* Note: under VMS with SOCKETSHR, it seems like the first parameter
* is 'char *', instead of 'const char *'
*/
# ifndef CONST_STRICT
s = getservbyname((char *)str, "tcp");
# else
s = getservbyname(str, "tcp");
# endif
if (s != NULL)
*port_ptr = ntohs((unsigned short)s->s_port);
CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
if (s == NULL) {
if (strcmp(str, "http") == 0)
*port_ptr = 80;
else if (strcmp(str, "telnet") == 0)
*port_ptr = 23;
else if (strcmp(str, "socks") == 0)
*port_ptr = 1080;
else if (strcmp(str, "https") == 0)
*port_ptr = 443;
else if (strcmp(str, "ssl") == 0)
*port_ptr = 443;
else if (strcmp(str, "ftp") == 0)
*port_ptr = 21;
else if (strcmp(str, "gopher") == 0)
*port_ptr = 70;
else {
SYSerr(SYS_F_GETSERVBYNAME, get_last_socket_error());
ERR_add_error_data(3, "service='", str, "'");
return (0);
}
}
}
return (1);
}
int BIO_sock_error(int sock)
{
int j, i;
union {
size_t s;
int i;
} size;
/* heuristic way to adapt for platforms that expect 64-bit optlen */
size.s = 0, size.i = 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, (void *)&size);
if (i < 0)
return (1);
else
return (j);
}
struct hostent *BIO_gethostbyname(const char *name)
{
/*
* Caching gethostbyname() results forever is wrong, so we have to let
* the true gethostbyname() worry about this
*/
# if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
return gethostbyname((char *)name);
# else
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 [beleived 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
# if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
WORD wVerReq;
WSADATA wsaData;
int err;
if (!wsa_init_done) {
wsa_init_done = 1;
wVerReq = MAKEWORD(2, 0);
err = WSAStartup(wVerReq, &wsaData);
if (err != 0) {
SYSerr(SYS_F_WSASTARTUP, err);
BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
return (-1);
}
}
# endif
return (1);
}
void BIO_sock_cleanup(void)
{
# ifdef OPENSSL_SYS_WINDOWS
if (wsa_init_done) {
wsa_init_done = 0;
WSACleanup();
}
# elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
if (wsa_init_done) {
wsa_init_done = 0;
WSACleanup();
}
# endif
}
# if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
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);
}
# endif /* __VMS_VER */
/*
* The reason I have implemented this instead of using sscanf is because
* Visual C 1.52c gives an unresolved external when linking a DLL :-(
*/
static int get_ip(const char *str, unsigned char ip[4])
{
unsigned int tmp[4];
int num = 0, c, ok = 0;
tmp[0] = tmp[1] = tmp[2] = tmp[3] = 0;
for (;;) {
c = *(str++);
if ((c >= '0') && (c <= '9')) {
ok = 1;
tmp[num] = tmp[num] * 10 + c - '0';
if (tmp[num] > 255)
return (0);
} else if (c == '.') {
if (!ok)
return (-1);
if (num == 3)
return (0);
num++;
ok = 0;
} else if (c == '\0' && (num == 3) && ok)
break;
else
return (0);
}
ip[0] = tmp[0];
ip[1] = tmp[1];
ip[2] = tmp[2];
ip[3] = tmp[3];
return (1);
}
int BIO_get_accept_socket(char *host, int bind_mode)
{
int ret = 0;
union {
struct sockaddr sa;
struct sockaddr_in sa_in;
# if OPENSSL_USE_IPV6
struct sockaddr_in6 sa_in6;
# endif
} server, client;
int s = INVALID_SOCKET, cs, addrlen;
unsigned char ip[4];
unsigned short port;
char *str = NULL, *e;
char *h, *p;
unsigned long l;
int err_num;
if (BIO_sock_init() != 1)
return (INVALID_SOCKET);
if ((str = BUF_strdup(host)) == NULL)
return (INVALID_SOCKET);
h = p = NULL;
h = str;
for (e = str; *e; e++) {
if (*e == ':') {
p = e;
} else if (*e == '/') {
*e = '\0';
break;
}
}
if (p)
*p++ = '\0'; /* points at last ':', '::port' is special
* [see below] */
else
p = h, h = NULL;
# ifdef EAI_FAMILY
do {
static union {
void *p;
int (WSAAPI *f) (const char *, const char *,
const struct addrinfo *, struct addrinfo **);
} p_getaddrinfo = {
NULL
};
static union {
void *p;
void (WSAAPI *f) (struct addrinfo *);
} p_freeaddrinfo = {
NULL
};
struct addrinfo *res, hint;
if (p_getaddrinfo.p == NULL) {
if ((p_getaddrinfo.p = DSO_global_lookup("getaddrinfo")) == NULL
|| (p_freeaddrinfo.p =
DSO_global_lookup("freeaddrinfo")) == NULL)
p_getaddrinfo.p = (void *)-1;
}
if (p_getaddrinfo.p == (void *)-1)
break;
/*
* '::port' enforces IPv6 wildcard listener. Some OSes, e.g. Solaris,
* default to IPv6 without any hint. Also note that commonly IPv6
* wildchard socket can service IPv4 connections just as well...
*/
memset(&hint, 0, sizeof(hint));
hint.ai_flags = AI_PASSIVE;
if (h) {
if (strchr(h, ':')) {
if (h[1] == '\0')
h = NULL;
# if OPENSSL_USE_IPV6
hint.ai_family = AF_INET6;
# else
h = NULL;
# endif
} else if (h[0] == '*' && h[1] == '\0') {
hint.ai_family = AF_INET;
h = NULL;
}
}
if ((*p_getaddrinfo.f) (h, p, &hint, &res))
break;
addrlen = res->ai_addrlen <= sizeof(server) ?
res->ai_addrlen : sizeof(server);
memcpy(&server, res->ai_addr, addrlen);
(*p_freeaddrinfo.f) (res);
goto again;
} while (0);
# endif
if (!BIO_get_port(p, &port))
goto err;
memset(&server, 0, sizeof(server));
server.sa_in.sin_family = AF_INET;
server.sa_in.sin_port = htons(port);
addrlen = sizeof(server.sa_in);
if (h == NULL || strcmp(h, "*") == 0)
server.sa_in.sin_addr.s_addr = INADDR_ANY;
else {
if (!BIO_get_host_ip(h, &(ip[0])))
goto err;
l = (unsigned long)
((unsigned long)ip[0] << 24L) |
((unsigned long)ip[1] << 16L) |
((unsigned long)ip[2] << 8L) | ((unsigned long)ip[3]);
server.sa_in.sin_addr.s_addr = htonl(l);
}
again:
s = socket(server.sa.sa_family, SOCK_STREAM, SOCKET_PROTOCOL);
if (s == INVALID_SOCKET) {
SYSerr(SYS_F_SOCKET, get_last_socket_error());
ERR_add_error_data(3, "port='", host, "'");
BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_CREATE_SOCKET);
goto err;
}
# ifdef SO_REUSEADDR
if (bind_mode == BIO_BIND_REUSEADDR) {
int i = 1;
ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&i, sizeof(i));
bind_mode = BIO_BIND_NORMAL;
}
# endif
if (bind(s, &server.sa, addrlen) == -1) {
# ifdef SO_REUSEADDR
err_num = get_last_socket_error();
if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
# ifdef OPENSSL_SYS_WINDOWS
/*
* Some versions of Windows define EADDRINUSE to a dummy value.
*/
(err_num == WSAEADDRINUSE))
# else
(err_num == EADDRINUSE))
# endif
{
client = server;
if (h == NULL || strcmp(h, "*") == 0) {
# if OPENSSL_USE_IPV6
if (client.sa.sa_family == AF_INET6) {
memset(&client.sa_in6.sin6_addr, 0,
sizeof(client.sa_in6.sin6_addr));
client.sa_in6.sin6_addr.s6_addr[15] = 1;
} else
# endif
if (client.sa.sa_family == AF_INET) {
client.sa_in.sin_addr.s_addr = htonl(0x7F000001);
} else
goto err;
}
cs = socket(client.sa.sa_family, SOCK_STREAM, SOCKET_PROTOCOL);
if (cs != INVALID_SOCKET) {
int ii;
ii = connect(cs, &client.sa, addrlen);
closesocket(cs);
if (ii == INVALID_SOCKET) {
bind_mode = BIO_BIND_REUSEADDR;
closesocket(s);
goto again;
}
/* else error */
}
/* else error */
}
# endif
SYSerr(SYS_F_BIND, err_num);
ERR_add_error_data(3, "port='", host, "'");
BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_BIND_SOCKET);
goto err;
}
if (listen(s, MAX_LISTEN) == -1) {
SYSerr(SYS_F_BIND, get_last_socket_error());
ERR_add_error_data(3, "port='", host, "'");
BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_LISTEN_SOCKET);
goto err;
}
ret = 1;
err:
OPENSSL_free(str);
if ((ret == 0) && (s != INVALID_SOCKET)) {
closesocket(s);
s = INVALID_SOCKET;
}
return (s);
}
int BIO_accept(int sock, char **addr)
{
int ret = INVALID_SOCKET;
unsigned long l;
unsigned short port;
char *p;
struct {
/*
* As for following union. Trouble is that there are platforms
* that have socklen_t and there are platforms that don't, on
* some platforms socklen_t is int and on some size_t. So what
* one can do? One can cook #ifdef spaghetti, which is nothing
* but masochistic. Or one can do union between int and size_t.
* One naturally does it primarily for 64-bit platforms where
* sizeof(int) != sizeof(size_t). But would it work? Note that
* if size_t member is initialized to 0, then later int member
* assignment naturally does the job on little-endian platforms
* regardless accept's expectations! What about big-endians?
* If accept expects int*, then it works, and if size_t*, then
* length value would appear as unreasonably large. But this
* won't prevent it from filling in the address structure. The
* trouble of course would be if accept returns more data than
* actual buffer can accomodate and overwrite stack... That's
* where early OPENSSL_assert comes into picture. Besides, the
* only 64-bit big-endian platform found so far that expects
* size_t* is HP-UX, where stack grows towards higher address.
* <appro>
*/
union {
size_t s;
int i;
} len;
union {
struct sockaddr sa;
struct sockaddr_in sa_in;
# if OPENSSL_USE_IPV6
struct sockaddr_in6 sa_in6;
# endif
} from;
} sa;
sa.len.s = 0;
sa.len.i = sizeof(sa.from);
memset(&sa.from, 0, sizeof(sa.from));
ret = accept(sock, &sa.from.sa, (void *)&sa.len);
if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
OPENSSL_assert(sa.len.s <= sizeof(sa.from));
sa.len.i = (int)sa.len.s;
/* use sa.len.i from this point */
}
if (ret == INVALID_SOCKET) {
if (BIO_sock_should_retry(ret))
return -2;
SYSerr(SYS_F_ACCEPT, get_last_socket_error());
BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
goto end;
}
if (addr == NULL)
goto end;
# ifdef EAI_FAMILY
do {
char h[NI_MAXHOST], s[NI_MAXSERV];
size_t nl;
static union {
void *p;
int (WSAAPI *f) (const struct sockaddr *, size_t /* socklen_t */ ,
char *, size_t, char *, size_t, int);
} p_getnameinfo = {
NULL
};
/*
* 2nd argument to getnameinfo is specified to be socklen_t.
* Unfortunately there is a number of environments where socklen_t is
* not defined. As it's passed by value, it's safe to pass it as
* size_t... <appro>
*/
if (p_getnameinfo.p == NULL) {
if ((p_getnameinfo.p = DSO_global_lookup("getnameinfo")) == NULL)
p_getnameinfo.p = (void *)-1;
}
if (p_getnameinfo.p == (void *)-1)
break;
if ((*p_getnameinfo.f) (&sa.from.sa, sa.len.i, h, sizeof(h), s,
sizeof(s), NI_NUMERICHOST | NI_NUMERICSERV))
break;
nl = strlen(h) + strlen(s) + 2;
p = *addr;
if (p)
*p = '\0';
p = OPENSSL_realloc(p, nl);
if (p == NULL) {
BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
goto end;
}
*addr = p;
BIO_snprintf(*addr, nl, "%s:%s", h, s);
goto end;
} while (0);
# endif
if (sa.from.sa.sa_family != AF_INET)
goto end;
l = ntohl(sa.from.sa_in.sin_addr.s_addr);
port = ntohs(sa.from.sa_in.sin_port);
if (*addr == NULL) {
if ((p = OPENSSL_malloc(24)) == NULL) {
BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
goto end;
}
*addr = p;
}
BIO_snprintf(*addr, 24, "%d.%d.%d.%d:%d",
(unsigned char)(l >> 24L) & 0xff,
(unsigned char)(l >> 16L) & 0xff,
(unsigned char)(l >> 8L) & 0xff,
(unsigned char)(l) & 0xff, port);
end:
return (ret);
}
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
ret = BIO_socket_ioctl(s, FIONBIO, &l);
# endif
return (ret == 0);
}
#endif
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