/* 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
#if 0
static unsigned long BIO_ghbn_hits=0L;
static unsigned long BIO_ghbn_miss=0L;
#define GHBN_NUM 4
static struct ghbn_cache_st
{
char name[129];
struct hostent *ent;
unsigned long order;
} ghbn_cache[GHBN_NUM];
#endif
static int get_ip(const char *str,unsigned char *ip);
#if 0
static void ghbn_free(struct hostent *a);
static struct hostent *ghbn_dup(struct hostent *a);
#endif
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;
}
/* cast to short because of win16 winsock definition */
if ((short)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;
#if 0
else if (strcmp(str,"wais") == 0)
*port_ptr=21;
#endif
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;
int size;
#if defined(OPENSSL_SYS_BEOS_R5)
return 0;
#endif
size=sizeof(int);
/* 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);
}
#if 0
long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
{
int i;
char **p;
switch (cmd)
{
case BIO_GHBN_CTRL_HITS:
return(BIO_ghbn_hits);
/* break; */
case BIO_GHBN_CTRL_MISSES:
return(BIO_ghbn_miss);
/* break; */
case BIO_GHBN_CTRL_CACHE_SIZE:
return(GHBN_NUM);
/* break; */
case BIO_GHBN_CTRL_GET_ENTRY:
if ((iarg >= 0) && (iarg <GHBN_NUM) &&
(ghbn_cache[iarg].order > 0))
{
p=(char **)parg;
if (p == NULL) return(0);
*p=ghbn_cache[iarg].name;
ghbn_cache[iarg].name[128]='\0';
return(1);
}
return(0);
/* break; */
case BIO_GHBN_CTRL_FLUSH:
for (i=0; i<GHBN_NUM; i++)
ghbn_cache[i].order=0;
break;
default:
return(0);
}
return(1);
}
#endif
#if 0
static struct hostent *ghbn_dup(struct hostent *a)
{
struct hostent *ret;
int i,j;
MemCheck_off();
ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
if (ret == NULL) return(NULL);
memset(ret,0,sizeof(struct hostent));
for (i=0; a->h_aliases[i] != NULL; i++)
;
i++;
ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
if (ret->h_aliases == NULL)
goto err;
memset(ret->h_aliases, 0, i*sizeof(char *));
for (i=0; a->h_addr_list[i] != NULL; i++)
;
i++;
ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
if (ret->h_addr_list == NULL)
goto err;
memset(ret->h_addr_list, 0, i*sizeof(char *));
j=strlen(a->h_name)+1;
if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
memcpy((char *)ret->h_name,a->h_name,j);
for (i=0; a->h_aliases[i] != NULL; i++)
{
j=strlen(a->h_aliases[i])+1;
if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
memcpy(ret->h_aliases[i],a->h_aliases[i],j);
}
ret->h_length=a->h_length;
ret->h_addrtype=a->h_addrtype;
for (i=0; a->h_addr_list[i] != NULL; i++)
{
if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
goto err;
memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
}
if (0)
{
err:
if (ret != NULL)
ghbn_free(ret);
ret=NULL;
}
MemCheck_on();
return(ret);
}
static void ghbn_free(struct hostent *a)
{
int i;
if(a == NULL)
return;
if (a->h_aliases != NULL)
{
for (i=0; a->h_aliases[i] != NULL; i++)
OPENSSL_free(a->h_aliases[i]);
OPENSSL_free(a->h_aliases);
}
if (a->h_addr_list != NULL)
{
for (i=0; a->h_addr_list[i] != NULL; i++)
OPENSSL_free(a->h_addr_list[i]);
OPENSSL_free(a->h_addr_list);
}
if (a->h_name != NULL) OPENSSL_free(a->h_name);
OPENSSL_free(a);
}
#endif
struct hostent *BIO_gethostbyname(const char *name)
{
#if 1
/* 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
#else
struct hostent *ret;
int i,lowi=0,j;
unsigned long low= (unsigned long)-1;
# if 0
/* It doesn't make sense to use locking here: The function interface
* is not thread-safe, because threads can never be sure when
* some other thread destroys the data they were given a pointer to.
*/
CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
# endif
j=strlen(name);
if (j < 128)
{
for (i=0; i<GHBN_NUM; i++)
{
if (low > ghbn_cache[i].order)
{
low=ghbn_cache[i].order;
lowi=i;
}
if (ghbn_cache[i].order > 0)
{
if (strncmp(name,ghbn_cache[i].name,128) == 0)
break;
}
}
}
else
i=GHBN_NUM;
if (i == GHBN_NUM) /* no hit*/
{
BIO_ghbn_miss++;
/* Note: under VMS with SOCKETSHR, it seems like the first
* parameter is 'char *', instead of 'const char *'
*/
# ifndef CONST_STRICT
ret=gethostbyname((char *)name);
# else
ret=gethostbyname(name);
# endif
if (ret == NULL)
goto end;
if (j > 128) /* too big to cache */
{
# if 0
/* If we were trying to make this function thread-safe (which
* is bound to fail), we'd have to give up in this case
* (or allocate more memory). */
ret = NULL;
# endif
goto end;
}
/* else add to cache */
if (ghbn_cache[lowi].ent != NULL)
ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
ghbn_cache[lowi].name[0] = '\0';
if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
{
BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
goto end;
}
strncpy(ghbn_cache[lowi].name,name,128);
ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
}
else
{
BIO_ghbn_hits++;
ret= ghbn_cache[i].ent;
ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
}
end:
# if 0
CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
# endif
return(ret);
#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;
#if 0 /* this call is claimed to be non-present in Winsock2 */
WSACancelBlockingCall();
#endif
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((char *)&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:
if (str != NULL) 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); }
else { p = OPENSSL_malloc(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);
}
#endif
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);
}