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xenocara/lib/libxtrans/Xtranssock.c

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/*
Copyright 1993, 1994, 1998 The Open Group
Copyright 2002 Sun Microsystems, Inc. All rights reserved.
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of the copyright holders shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from the copyright holders.
* Copyright 1993, 1994 NCR Corporation - Dayton, Ohio, USA
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name NCR not be used in advertising
* or publicity pertaining to distribution of the software without specific,
* written prior permission. NCR makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* NCR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
* NO EVENT SHALL NCR BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <ctype.h>
#ifdef XTHREADS
#include <X11/Xthreads.h>
#endif
#ifndef WIN32
#if defined(TCPCONN) || defined(UNIXCONN)
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
#if defined(TCPCONN) || defined(UNIXCONN)
#define X_INCLUDE_NETDB_H
#define XOS_USE_NO_LOCKING
#include <X11/Xos_r.h>
#endif
#ifdef UNIXCONN
#ifndef X_NO_SYS_UN
#include <sys/un.h>
#endif
#include <sys/stat.h>
#endif
#ifndef NO_TCP_H
#if defined(linux) || defined(__GLIBC__)
#include <sys/param.h>
#endif /* osf */
#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
#include <sys/param.h>
#include <machine/endian.h>
#endif /* __NetBSD__ || __OpenBSD__ || __FreeBSD__ || __DragonFly__ */
#include <netinet/tcp.h>
#endif /* !NO_TCP_H */
#include <sys/ioctl.h>
#if defined(SVR4)
#include <sys/filio.h>
#endif
#if (defined(__i386__) && defined(SYSV)) && !defined(SCO325) && !defined(sun)
#include <net/errno.h>
#endif
#if defined(__i386__) && defined(SYSV)
#include <sys/stropts.h>
#endif
#include <unistd.h>
#else /* !WIN32 */
#include <X11/Xwinsock.h>
#include <X11/Xwindows.h>
#include <X11/Xw32defs.h>
#undef close
#define close closesocket
#define ECONNREFUSED WSAECONNREFUSED
#define EADDRINUSE WSAEADDRINUSE
#define EPROTOTYPE WSAEPROTOTYPE
#undef EWOULDBLOCK
#define EWOULDBLOCK WSAEWOULDBLOCK
#define EINPROGRESS WSAEINPROGRESS
#undef EINTR
#define EINTR WSAEINTR
#define X_INCLUDE_NETDB_H
#define XOS_USE_MTSAFE_NETDBAPI
#include <X11/Xos_r.h>
#endif /* WIN32 */
#if defined(SO_DONTLINGER) && defined(SO_LINGER)
#undef SO_DONTLINGER
#endif
/* others don't need this */
#define SocketInitOnce() /**/
#ifdef linux
#define HAVE_ABSTRACT_SOCKETS
#endif
#define MIN_BACKLOG 128
#ifdef SOMAXCONN
#if SOMAXCONN > MIN_BACKLOG
#define BACKLOG SOMAXCONN
#endif
#endif
#ifndef BACKLOG
#define BACKLOG MIN_BACKLOG
#endif
/*
* This is the Socket implementation of the X Transport service layer
*
* This file contains the implementation for both the UNIX and INET domains,
* and can be built for either one, or both.
*
*/
typedef struct _Sockettrans2dev {
char *transname;
int family;
int devcotsname;
int devcltsname;
int protocol;
} Sockettrans2dev;
static Sockettrans2dev Sockettrans2devtab[] = {
#ifdef TCPCONN
{"inet",AF_INET,SOCK_STREAM,SOCK_DGRAM,0},
#if !defined(IPv6) || !defined(AF_INET6)
{"tcp",AF_INET,SOCK_STREAM,SOCK_DGRAM,0},
#else /* IPv6 */
{"tcp",AF_INET6,SOCK_STREAM,SOCK_DGRAM,0},
{"tcp",AF_INET,SOCK_STREAM,SOCK_DGRAM,0}, /* fallback */
{"inet6",AF_INET6,SOCK_STREAM,SOCK_DGRAM,0},
#endif
#endif /* TCPCONN */
#ifdef UNIXCONN
{"unix",AF_UNIX,SOCK_STREAM,SOCK_DGRAM,0},
#if !defined(LOCALCONN)
{"local",AF_UNIX,SOCK_STREAM,SOCK_DGRAM,0},
#endif /* !LOCALCONN */
#endif /* UNIXCONN */
};
#define NUMSOCKETFAMILIES (sizeof(Sockettrans2devtab)/sizeof(Sockettrans2dev))
#ifdef TCPCONN
static int TRANS(SocketINETClose) (XtransConnInfo ciptr);
#endif
#ifdef UNIXCONN
#if defined(X11_t)
#define UNIX_PATH "/tmp/.X11-unix/X"
#define UNIX_DIR "/tmp/.X11-unix"
#endif /* X11_t */
#if defined(XIM_t)
#define UNIX_PATH "/tmp/.XIM-unix/XIM"
#define UNIX_DIR "/tmp/.XIM-unix"
#endif /* XIM_t */
#if defined(FS_t) || defined(FONT_t)
#define UNIX_PATH "/tmp/.font-unix/fs"
#define UNIX_DIR "/tmp/.font-unix"
#endif /* FS_t || FONT_t */
#if defined(ICE_t)
#define UNIX_PATH "/tmp/.ICE-unix/"
#define UNIX_DIR "/tmp/.ICE-unix"
#endif /* ICE_t */
#if defined(TEST_t)
#define UNIX_PATH "/tmp/.Test-unix/test"
#define UNIX_DIR "/tmp/.Test-unix"
#endif
#if defined(LBXPROXY_t)
#define UNIX_PATH "/tmp/.X11-unix/X"
#define UNIX_DIR "/tmp/.X11-unix"
#endif
#endif /* UNIXCONN */
#define PORTBUFSIZE 32
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 255
#endif
#if defined HAVE_SOCKLEN_T || (defined(IPv6) && defined(AF_INET6))
# define SOCKLEN_T socklen_t
#elif defined(SVR4) || defined(__SCO__)
# define SOCKLEN_T size_t
#else
# define SOCKLEN_T int
#endif
/*
* This provides compatibility for apps linked against system libraries
* that don't have IPv6 support.
*/
#if defined(IPv6) && defined(AF_INET6)
static const struct in6_addr local_in6addr_any = IN6ADDR_ANY_INIT;
#pragma weak in6addr_any = local_in6addr_any
static int haveIPv6 = 1;
#endif
/*
* These are some utility function used by the real interface function below.
*/
static int
TRANS(SocketSelectFamily) (int first, char *family)
{
int i;
PRMSG (3,"SocketSelectFamily(%s)\n", family, 0, 0);
for (i = first + 1; i < NUMSOCKETFAMILIES;i++)
{
if (!strcmp (family, Sockettrans2devtab[i].transname))
return i;
}
return (first == -1 ? -2 : -1);
}
/*
* This function gets the local address of the socket and stores it in the
* XtransConnInfo structure for the connection.
*/
static int
TRANS(SocketINETGetAddr) (XtransConnInfo ciptr)
{
#if defined(IPv6) && defined(AF_INET6)
struct sockaddr_storage socknamev6;
#endif
struct sockaddr_in socknamev4;
void *socknamePtr;
SOCKLEN_T namelen;
PRMSG (3,"SocketINETGetAddr(%p)\n", ciptr, 0, 0);
#if defined(IPv6) && defined(AF_INET6)
if (haveIPv6)
{
namelen = sizeof(socknamev6);
socknamePtr = &socknamev6;
}
else
#endif
{
namelen = sizeof(socknamev4);
socknamePtr = &socknamev4;
}
bzero(socknamePtr, namelen);
if (getsockname (ciptr->fd,(struct sockaddr *) socknamePtr,
(void *)&namelen) < 0)
{
#ifdef WIN32
errno = WSAGetLastError();
#endif
PRMSG (1,"SocketINETGetAddr: getsockname() failed: %d\n",
EGET(),0, 0);
return -1;
}
/*
* Everything looks good: fill in the XtransConnInfo structure.
*/
if ((ciptr->addr = (char *) xalloc (namelen)) == NULL)
{
PRMSG (1,
"SocketINETGetAddr: Can't allocate space for the addr\n",
0, 0, 0);
return -1;
}
#if defined(IPv6) && defined(AF_INET6)
if (haveIPv6)
{
ciptr->family = ((struct sockaddr *)socknamePtr)->sa_family;
}
else
#endif
{
ciptr->family = socknamev4.sin_family;
}
ciptr->addrlen = namelen;
memcpy (ciptr->addr, socknamePtr, ciptr->addrlen);
return 0;
}
/*
* This function gets the remote address of the socket and stores it in the
* XtransConnInfo structure for the connection.
*/
static int
TRANS(SocketINETGetPeerAddr) (XtransConnInfo ciptr)
{
#if defined(IPv6) && defined(AF_INET6)
struct sockaddr_storage socknamev6;
#endif
struct sockaddr_in socknamev4;
void *socknamePtr;
SOCKLEN_T namelen;
#if defined(IPv6) && defined(AF_INET6)
if (haveIPv6 && ciptr->family == AF_INET6)
{
namelen = sizeof(socknamev6);
socknamePtr = &socknamev6;
}
else
#endif
{
namelen = sizeof(socknamev4);
socknamePtr = &socknamev4;
}
bzero(socknamePtr, namelen);
PRMSG (3,"SocketINETGetPeerAddr(%p)\n", ciptr, 0, 0);
if (getpeername (ciptr->fd, (struct sockaddr *) socknamePtr,
(void *)&namelen) < 0)
{
#ifdef WIN32
errno = WSAGetLastError();
#endif
PRMSG (1,"SocketINETGetPeerAddr: getpeername() failed: %d\n",
EGET(), 0, 0);
return -1;
}
/*
* Everything looks good: fill in the XtransConnInfo structure.
*/
if ((ciptr->peeraddr = (char *) xalloc (namelen)) == NULL)
{
PRMSG (1,
"SocketINETGetPeerAddr: Can't allocate space for the addr\n",
0, 0, 0);
return -1;
}
ciptr->peeraddrlen = namelen;
memcpy (ciptr->peeraddr, socknamePtr, ciptr->peeraddrlen);
return 0;
}
static XtransConnInfo
TRANS(SocketOpen) (int i, int type)
{
XtransConnInfo ciptr;
PRMSG (3,"SocketOpen(%d,%d)\n", i, type, 0);
#if defined(IPv6) && defined(AF_INET6)
if (!haveIPv6 && Sockettrans2devtab[i].family == AF_INET6)
return NULL;
#endif
if ((ciptr = (XtransConnInfo) xcalloc (
1, sizeof(struct _XtransConnInfo))) == NULL)
{
PRMSG (1, "SocketOpen: malloc failed\n", 0, 0, 0);
return NULL;
}
if ((ciptr->fd = socket(Sockettrans2devtab[i].family, type,
Sockettrans2devtab[i].protocol)) < 0
#ifndef WIN32
#if (defined(X11_t) && !defined(USE_POLL)) || defined(FS_t) || defined(FONT_t)
|| ciptr->fd >= sysconf(_SC_OPEN_MAX)
#endif
#endif
) {
#ifdef WIN32
errno = WSAGetLastError();
#endif
PRMSG (2, "SocketOpen: socket() failed for %s\n",
Sockettrans2devtab[i].transname, 0, 0);
xfree ((char *) ciptr);
return NULL;
}
#ifdef TCP_NODELAY
if (Sockettrans2devtab[i].family == AF_INET
#if defined(IPv6) && defined(AF_INET6)
|| Sockettrans2devtab[i].family == AF_INET6
#endif
)
{
/*
* turn off TCP coalescence for INET sockets
*/
int tmp = 1;
setsockopt (ciptr->fd, IPPROTO_TCP, TCP_NODELAY,
(char *) &tmp, sizeof (int));
}
#endif
return ciptr;
}
#ifdef TRANS_REOPEN
static XtransConnInfo
TRANS(SocketReopen) (int i, int type, int fd, char *port)
{
XtransConnInfo ciptr;
int portlen;
struct sockaddr *addr;
PRMSG (3,"SocketReopen(%d,%d,%s)\n", type, fd, port);
if (port == NULL) {
PRMSG (1, "SocketReopen: port was null!\n", 0, 0, 0);
return NULL;
}
portlen = strlen(port) + 1; // include space for trailing null
#ifdef SOCK_MAXADDRLEN
if (portlen < 0 || portlen > (SOCK_MAXADDRLEN + 2)) {
PRMSG (1, "SocketReopen: invalid portlen %d\n", portlen, 0, 0);
return NULL;
}
if (portlen < 14) portlen = 14;
#else
if (portlen < 0 || portlen > 14) {
PRMSG (1, "SocketReopen: invalid portlen %d\n", portlen, 0, 0);
return NULL;
}
#endif /*SOCK_MAXADDRLEN*/
if ((ciptr = (XtransConnInfo) xcalloc (
1, sizeof(struct _XtransConnInfo))) == NULL)
{
PRMSG (1, "SocketReopen: malloc(ciptr) failed\n", 0, 0, 0);
return NULL;
}
ciptr->fd = fd;
if ((addr = (struct sockaddr *) xcalloc (1, portlen + 2)) == NULL) {
PRMSG (1, "SocketReopen: malloc(addr) failed\n", 0, 0, 0);
return NULL;
}
ciptr->addr = (char *) addr;
ciptr->addrlen = portlen + 2;
if ((ciptr->peeraddr = (char *) xcalloc (1, portlen + 2)) == NULL) {
PRMSG (1, "SocketReopen: malloc(portaddr) failed\n", 0, 0, 0);
return NULL;
}
ciptr->peeraddrlen = portlen + 2;
/* Initialize ciptr structure as if it were a normally-opened unix socket */
ciptr->flags = TRANS_LOCAL | TRANS_NOUNLINK;
#ifdef BSD44SOCKETS
addr->sa_len = portlen + 1;
#endif
addr->sa_family = AF_UNIX;
#ifdef HAS_STRLCPY
strlcpy(addr->sa_data, port, portlen);
#else
strncpy(addr->sa_data, port, portlen);
#endif
ciptr->family = AF_UNIX;
memcpy(ciptr->peeraddr, ciptr->addr, sizeof(struct sockaddr));
ciptr->port = rindex(addr->sa_data, ':');
if (ciptr->port[0] == ':') ciptr->port++; /* port should now point to portnum or NULL */
return ciptr;
}
#endif /* TRANS_REOPEN */
/*
* These functions are the interface supplied in the Xtransport structure
*/
#ifdef TRANS_CLIENT
static XtransConnInfo
TRANS(SocketOpenCOTSClientBase) (char *transname, char *protocol,
char *host, char *port, int previndex)
{
XtransConnInfo ciptr;
int i = previndex;
PRMSG (2, "SocketOpenCOTSClient(%s,%s,%s)\n",
protocol, host, port);
SocketInitOnce();
while ((i = TRANS(SocketSelectFamily) (i, transname)) >= 0) {
if ((ciptr = TRANS(SocketOpen) (
i, Sockettrans2devtab[i].devcotsname)) != NULL)
break;
}
if (i < 0) {
if (i == -1)
PRMSG (1,"SocketOpenCOTSClient: Unable to open socket for %s\n",
transname, 0, 0);
else
PRMSG (1,"SocketOpenCOTSClient: Unable to determine socket type for %s\n",
transname, 0, 0);
return NULL;
}
/* Save the index for later use */
ciptr->index = i;
return ciptr;
}
static XtransConnInfo
TRANS(SocketOpenCOTSClient) (Xtransport *thistrans, char *protocol,
char *host, char *port)
{
return TRANS(SocketOpenCOTSClientBase)(
thistrans->TransName, protocol, host, port, -1);
}
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
static XtransConnInfo
TRANS(SocketOpenCOTSServer) (Xtransport *thistrans, char *protocol,
char *host, char *port)
{
XtransConnInfo ciptr;
int i = -1;
PRMSG (2,"SocketOpenCOTSServer(%s,%s,%s)\n", protocol, host, port);
SocketInitOnce();
while ((i = TRANS(SocketSelectFamily) (i, thistrans->TransName)) >= 0) {
if ((ciptr = TRANS(SocketOpen) (
i, Sockettrans2devtab[i].devcotsname)) != NULL)
break;
}
if (i < 0) {
if (i == -1)
PRMSG (1,"SocketOpenCOTSServer: Unable to open socket for %s\n",
thistrans->TransName, 0, 0);
else
PRMSG (1,"SocketOpenCOTSServer: Unable to determine socket type for %s\n",
thistrans->TransName, 0, 0);
return NULL;
}
/*
* Using this prevents the bind() check for an existing server listening
* on the same port, but it is required for other reasons.
*/
#ifdef SO_REUSEADDR
/*
* SO_REUSEADDR only applied to AF_INET && AF_INET6
*/
if (Sockettrans2devtab[i].family == AF_INET
#if defined(IPv6) && defined(AF_INET6)
|| Sockettrans2devtab[i].family == AF_INET6
#endif
)
{
int one = 1;
setsockopt (ciptr->fd, SOL_SOCKET, SO_REUSEADDR,
(char *) &one, sizeof (int));
}
#endif
#ifdef IPV6_V6ONLY
if (Sockettrans2devtab[i].family == AF_INET6)
{
int one = 1;
setsockopt(ciptr->fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(int));
}
#endif
/* Save the index for later use */
ciptr->index = i;
return ciptr;
}
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
static XtransConnInfo
TRANS(SocketOpenCLTSClient) (Xtransport *thistrans, char *protocol,
char *host, char *port)
{
XtransConnInfo ciptr;
int i = -1;
PRMSG (2,"SocketOpenCLTSClient(%s,%s,%s)\n", protocol, host, port);
SocketInitOnce();
while ((i = TRANS(SocketSelectFamily) (i, thistrans->TransName)) >= 0) {
if ((ciptr = TRANS(SocketOpen) (
i, Sockettrans2devtab[i].devcotsname)) != NULL)
break;
}
if (i < 0) {
if (i == -1)
PRMSG (1,"SocketOpenCLTSClient: Unable to open socket for %s\n",
thistrans->TransName, 0, 0);
else
PRMSG (1,"SocketOpenCLTSClient: Unable to determine socket type for %s\n",
thistrans->TransName, 0, 0);
return NULL;
}
/* Save the index for later use */
ciptr->index = i;
return ciptr;
}
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
static XtransConnInfo
TRANS(SocketOpenCLTSServer) (Xtransport *thistrans, char *protocol,
char *host, char *port)
{
XtransConnInfo ciptr;
int i = -1;
PRMSG (2,"SocketOpenCLTSServer(%s,%s,%s)\n", protocol, host, port);
SocketInitOnce();
while ((i = TRANS(SocketSelectFamily) (i, thistrans->TransName)) >= 0) {
if ((ciptr = TRANS(SocketOpen) (
i, Sockettrans2devtab[i].devcotsname)) != NULL)
break;
}
if (i < 0) {
if (i == -1)
PRMSG (1,"SocketOpenCLTSServer: Unable to open socket for %s\n",
thistrans->TransName, 0, 0);
else
PRMSG (1,"SocketOpenCLTSServer: Unable to determine socket type for %s\n",
thistrans->TransName, 0, 0);
return NULL;
}
#ifdef IPV6_V6ONLY
if (Sockettrans2devtab[i].family == AF_INET6)
{
int one = 1;
setsockopt(ciptr->fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(int));
}
#endif
/* Save the index for later use */
ciptr->index = i;
return ciptr;
}
#endif /* TRANS_SERVER */
#ifdef TRANS_REOPEN
static XtransConnInfo
TRANS(SocketReopenCOTSServer) (Xtransport *thistrans, int fd, char *port)
{
XtransConnInfo ciptr;
int i = -1;
PRMSG (2,
"SocketReopenCOTSServer(%d, %s)\n", fd, port, 0);
SocketInitOnce();
while ((i = TRANS(SocketSelectFamily) (i, thistrans->TransName)) >= 0) {
if ((ciptr = TRANS(SocketReopen) (
i, Sockettrans2devtab[i].devcotsname, fd, port)) != NULL)
break;
}
if (i < 0) {
if (i == -1)
PRMSG (1,"SocketReopenCOTSServer: Unable to open socket for %s\n",
thistrans->TransName, 0, 0);
else
PRMSG (1,"SocketReopenCOTSServer: Unable to determine socket type for %s\n",
thistrans->TransName, 0, 0);
return NULL;
}
/* Save the index for later use */
ciptr->index = i;
return ciptr;
}
static XtransConnInfo
TRANS(SocketReopenCLTSServer) (Xtransport *thistrans, int fd, char *port)
{
XtransConnInfo ciptr;
int i = -1;
PRMSG (2,
"SocketReopenCLTSServer(%d, %s)\n", fd, port, 0);
SocketInitOnce();
while ((i = TRANS(SocketSelectFamily) (i, thistrans->TransName)) >= 0) {
if ((ciptr = TRANS(SocketReopen) (
i, Sockettrans2devtab[i].devcotsname, fd, port)) != NULL)
break;
}
if (i < 0) {
if (i == -1)
PRMSG (1,"SocketReopenCLTSServer: Unable to open socket for %s\n",
thistrans->TransName, 0, 0);
else
PRMSG (1,"SocketReopenCLTSServer: Unable to determine socket type for %s\n",
thistrans->TransName, 0, 0);
return NULL;
}
/* Save the index for later use */
ciptr->index = i;
return ciptr;
}
#endif /* TRANS_REOPEN */
static int
TRANS(SocketSetOption) (XtransConnInfo ciptr, int option, int arg)
{
PRMSG (2,"SocketSetOption(%d,%d,%d)\n", ciptr->fd, option, arg);
return -1;
}
#ifdef UNIXCONN
static int
set_sun_path(const char *port, const char *upath, char *path, int abstract)
{
struct sockaddr_un s;
int maxlen = sizeof(s.sun_path) - 1;
const char *at = "";
if (!port || !*port || !path)
return -1;
#ifdef HAVE_ABSTRACT_SOCKETS
if (port[0] == '@')
upath = "";
else if (abstract)
at = "@";
#endif
if (*port == '/') /* a full pathname */
upath = "";
if (strlen(port) + strlen(upath) > maxlen)
return -1;
snprintf(path, maxlen+1, "%s%s%s", at, upath, port);
return 0;
}
#endif
#ifdef TRANS_SERVER
static int
TRANS(SocketCreateListener) (XtransConnInfo ciptr,
struct sockaddr *sockname,
int socknamelen, unsigned int flags)
{
SOCKLEN_T namelen = socknamelen;
int fd = ciptr->fd;
int retry;
PRMSG (3, "SocketCreateListener(%x,%p)\n", ciptr, fd, 0);
if (Sockettrans2devtab[ciptr->index].family == AF_INET
#if defined(IPv6) && defined(AF_INET6)
|| Sockettrans2devtab[ciptr->index].family == AF_INET6
#endif
)
retry = 20;
else
retry = 0;
while (bind (fd, (struct sockaddr *) sockname, namelen) < 0)
{
if (errno == EADDRINUSE) {
if (flags & ADDR_IN_USE_ALLOWED)
break;
else
return TRANS_ADDR_IN_USE;
}
if (retry-- == 0) {
PRMSG (1, "SocketCreateListener: failed to bind listener\n",
0, 0, 0);
close (fd);
return TRANS_CREATE_LISTENER_FAILED;
}
#ifdef SO_REUSEADDR
sleep (1);
#else
sleep (10);
#endif /* SO_REUSEDADDR */
}
if (Sockettrans2devtab[ciptr->index].family == AF_INET
#if defined(IPv6) && defined(AF_INET6)
|| Sockettrans2devtab[ciptr->index].family == AF_INET6
#endif
) {
#ifdef SO_DONTLINGER
setsockopt (fd, SOL_SOCKET, SO_DONTLINGER, (char *) NULL, 0);
#else
#ifdef SO_LINGER
{
static int linger[2] = { 0, 0 };
setsockopt (fd, SOL_SOCKET, SO_LINGER,
(char *) linger, sizeof (linger));
}
#endif
#endif
}
if (listen (fd, BACKLOG) < 0)
{
PRMSG (1, "SocketCreateListener: listen() failed\n", 0, 0, 0);
close (fd);
return TRANS_CREATE_LISTENER_FAILED;
}
/* Set a flag to indicate that this connection is a listener */
ciptr->flags = 1 | (ciptr->flags & TRANS_KEEPFLAGS);
return 0;
}
#ifdef TCPCONN
static int
TRANS(SocketINETCreateListener) (XtransConnInfo ciptr, char *port, unsigned int flags)
{
#if defined(IPv6) && defined(AF_INET6)
struct sockaddr_storage sockname;
#else
struct sockaddr_in sockname;
#endif
unsigned short sport;
SOCKLEN_T namelen = sizeof(sockname);
int status;
long tmpport;
#ifdef XTHREADS_NEEDS_BYNAMEPARAMS
_Xgetservbynameparams sparams;
#endif
struct servent *servp;
#ifdef X11_t
char portbuf[PORTBUFSIZE];
#endif
PRMSG (2, "SocketINETCreateListener(%s)\n", port, 0, 0);
#ifdef X11_t
/*
* X has a well known port, that is transport dependent. It is easier
* to handle it here, than try and come up with a transport independent
* representation that can be passed in and resolved the usual way.
*
* The port that is passed here is really a string containing the idisplay
* from ConnectDisplay().
*/
if (is_numeric (port))
{
/* fixup the server port address */
tmpport = X_TCP_PORT + strtol (port, (char**)NULL, 10);
snprintf (portbuf, sizeof(portbuf), "%lu", tmpport);
port = portbuf;
}
#endif
if (port && *port)
{
/* Check to see if the port string is just a number (handles X11) */
if (!is_numeric (port))
{
if ((servp = _XGetservbyname (port,"tcp",sparams)) == NULL)
{
PRMSG (1,
"SocketINETCreateListener: Unable to get service for %s\n",
port, 0, 0);
return TRANS_CREATE_LISTENER_FAILED;
}
/* we trust getservbyname to return a valid number */
sport = servp->s_port;
}
else
{
tmpport = strtol (port, (char**)NULL, 10);
/*
* check that somehow the port address isn't negative or in
* the range of reserved port addresses. This can happen and
* be very bad if the server is suid-root and the user does
* something (dumb) like `X :60049`.
*/
if (tmpport < 1024 || tmpport > USHRT_MAX)
return TRANS_CREATE_LISTENER_FAILED;
sport = (unsigned short) tmpport;
}
}
else
sport = 0;
bzero(&sockname, sizeof(sockname));
#if defined(IPv6) && defined(AF_INET6)
if (Sockettrans2devtab[ciptr->index].family == AF_INET) {
namelen = sizeof (struct sockaddr_in);
#ifdef BSD44SOCKETS
((struct sockaddr_in *)&sockname)->sin_len = namelen;
#endif
((struct sockaddr_in *)&sockname)->sin_family = AF_INET;
((struct sockaddr_in *)&sockname)->sin_port = htons(sport);
((struct sockaddr_in *)&sockname)->sin_addr.s_addr = htonl(INADDR_ANY);
} else {
namelen = sizeof (struct sockaddr_in6);
#ifdef SIN6_LEN
((struct sockaddr_in6 *)&sockname)->sin6_len = (u_int8_t)sizeof(sockname);
#endif
((struct sockaddr_in6 *)&sockname)->sin6_family = AF_INET6;
((struct sockaddr_in6 *)&sockname)->sin6_port = htons(sport);
((struct sockaddr_in6 *)&sockname)->sin6_addr = in6addr_any;
}
#else
#ifdef BSD44SOCKETS
sockname.sin_len = sizeof (sockname);
#endif
sockname.sin_family = AF_INET;
sockname.sin_port = htons (sport);
sockname.sin_addr.s_addr = htonl (INADDR_ANY);
#endif
if ((status = TRANS(SocketCreateListener) (ciptr,
(struct sockaddr *) &sockname, namelen, flags)) < 0)
{
PRMSG (1,
"SocketINETCreateListener: ...SocketCreateListener() failed\n",
0, 0, 0);
return status;
}
if (TRANS(SocketINETGetAddr) (ciptr) < 0)
{
PRMSG (1,
"SocketINETCreateListener: ...SocketINETGetAddr() failed\n",
0, 0, 0);
return TRANS_CREATE_LISTENER_FAILED;
}
return 0;
}
#endif /* TCPCONN */
#ifdef UNIXCONN
static int
TRANS(SocketUNIXCreateListener) (XtransConnInfo ciptr, char *port,
unsigned int flags)
{
struct sockaddr_un sockname;
int namelen;
int oldUmask;
int status;
unsigned int mode;
char tmpport[108];
int abstract = 0;
#ifdef HAVE_ABSTRACT_SOCKETS
abstract = ciptr->transptr->flags & TRANS_ABSTRACT;
#endif
PRMSG (2, "SocketUNIXCreateListener(%s)\n",
port ? port : "NULL", 0, 0);
/* Make sure the directory is created */
oldUmask = umask (0);
#ifdef UNIX_DIR
#ifdef HAS_STICKY_DIR_BIT
mode = 01777;
#else
mode = 0777;
#endif
if (!abstract && trans_mkdir(UNIX_DIR, mode) == -1) {
PRMSG (1, "SocketUNIXCreateListener: mkdir(%s) failed, errno = %d\n",
UNIX_DIR, errno, 0);
(void) umask (oldUmask);
return TRANS_CREATE_LISTENER_FAILED;
}
#endif
memset(&sockname, 0, sizeof(sockname));
sockname.sun_family = AF_UNIX;
if (!(port && *port)) {
snprintf (tmpport, sizeof(tmpport), "%s%ld", UNIX_PATH, (long)getpid());
port = tmpport;
}
if (set_sun_path(port, UNIX_PATH, sockname.sun_path, abstract) != 0) {
PRMSG (1, "SocketUNIXCreateListener: path too long\n", 0, 0, 0);
return TRANS_CREATE_LISTENER_FAILED;
}
#if (defined(BSD44SOCKETS) || defined(__UNIXWARE__))
sockname.sun_len = strlen(sockname.sun_path);
#endif
#if defined(BSD44SOCKETS) || defined(SUN_LEN)
namelen = SUN_LEN(&sockname);
#else
namelen = strlen(sockname.sun_path) + offsetof(struct sockaddr_un, sun_path);
#endif
if (abstract) {
sockname.sun_path[0] = '\0';
namelen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&sockname.sun_path[1]);
}
else
unlink (sockname.sun_path);
if ((status = TRANS(SocketCreateListener) (ciptr,
(struct sockaddr *) &sockname, namelen, flags)) < 0)
{
PRMSG (1,
"SocketUNIXCreateListener: ...SocketCreateListener() failed\n",
0, 0, 0);
(void) umask (oldUmask);
return status;
}
/*
* Now that the listener is esablished, create the addr info for
* this connection. getpeername() doesn't work for UNIX Domain Sockets
* on some systems (hpux at least), so we will just do it manually, instead
* of calling something like TRANS(SocketUNIXGetAddr).
*/
namelen = sizeof (sockname); /* this will always make it the same size */
if ((ciptr->addr = (char *) xalloc (namelen)) == NULL)
{
PRMSG (1,
"SocketUNIXCreateListener: Can't allocate space for the addr\n",
0, 0, 0);
(void) umask (oldUmask);
return TRANS_CREATE_LISTENER_FAILED;
}
if (abstract)
sockname.sun_path[0] = '@';
ciptr->family = sockname.sun_family;
ciptr->addrlen = namelen;
memcpy (ciptr->addr, &sockname, ciptr->addrlen);
(void) umask (oldUmask);
return 0;
}
static int
TRANS(SocketUNIXResetListener) (XtransConnInfo ciptr)
{
/*
* See if the unix domain socket has disappeared. If it has, recreate it.
*/
struct sockaddr_un *unsock = (struct sockaddr_un *) ciptr->addr;
struct stat statb;
int status = TRANS_RESET_NOOP;
unsigned int mode;
int abstract = 0;
#ifdef HAVE_ABSTRACT_SOCKETS
abstract = ciptr->transptr->flags & TRANS_ABSTRACT;
#endif
PRMSG (3, "SocketUNIXResetListener(%p,%d)\n", ciptr, ciptr->fd, 0);
if (!abstract && (
stat (unsock->sun_path, &statb) == -1 ||
((statb.st_mode & S_IFMT) !=
#if (defined (sun) && defined(SVR4)) || defined(NCR) || defined(SCO325) || !defined(S_IFSOCK)
S_IFIFO
#else
S_IFSOCK
#endif
)))
{
int oldUmask = umask (0);
#ifdef UNIX_DIR
#ifdef HAS_STICKY_DIR_BIT
mode = 01777;
#else
mode = 0777;
#endif
if (trans_mkdir(UNIX_DIR, mode) == -1) {
PRMSG (1, "SocketUNIXResetListener: mkdir(%s) failed, errno = %d\n",
UNIX_DIR, errno, 0);
(void) umask (oldUmask);
return TRANS_RESET_FAILURE;
}
#endif
close (ciptr->fd);
unlink (unsock->sun_path);
if ((ciptr->fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
{
TRANS(FreeConnInfo) (ciptr);
(void) umask (oldUmask);
return TRANS_RESET_FAILURE;
}
if (bind (ciptr->fd, (struct sockaddr *) unsock, ciptr->addrlen) < 0)
{
close (ciptr->fd);
TRANS(FreeConnInfo) (ciptr);
return TRANS_RESET_FAILURE;
}
if (listen (ciptr->fd, BACKLOG) < 0)
{
close (ciptr->fd);
TRANS(FreeConnInfo) (ciptr);
(void) umask (oldUmask);
return TRANS_RESET_FAILURE;
}
umask (oldUmask);
status = TRANS_RESET_NEW_FD;
}
return status;
}
#endif /* UNIXCONN */
#ifdef TCPCONN
static XtransConnInfo
TRANS(SocketINETAccept) (XtransConnInfo ciptr, int *status)
{
XtransConnInfo newciptr;
struct sockaddr_in sockname;
SOCKLEN_T namelen = sizeof(sockname);
PRMSG (2, "SocketINETAccept(%p,%d)\n", ciptr, ciptr->fd, 0);
if ((newciptr = (XtransConnInfo) xcalloc (
1, sizeof(struct _XtransConnInfo))) == NULL)
{
PRMSG (1, "SocketINETAccept: malloc failed\n", 0, 0, 0);
*status = TRANS_ACCEPT_BAD_MALLOC;
return NULL;
}
if ((newciptr->fd = accept (ciptr->fd,
(struct sockaddr *) &sockname, (void *)&namelen)) < 0)
{
#ifdef WIN32
errno = WSAGetLastError();
#endif
PRMSG (1, "SocketINETAccept: accept() failed\n", 0, 0, 0);
xfree (newciptr);
*status = TRANS_ACCEPT_FAILED;
return NULL;
}
#ifdef TCP_NODELAY
{
/*
* turn off TCP coalescence for INET sockets
*/
int tmp = 1;
setsockopt (newciptr->fd, IPPROTO_TCP, TCP_NODELAY,
(char *) &tmp, sizeof (int));
}
#endif
/*
* Get this address again because the transport may give a more
* specific address now that a connection is established.
*/
if (TRANS(SocketINETGetAddr) (newciptr) < 0)
{
PRMSG (1,
"SocketINETAccept: ...SocketINETGetAddr() failed:\n",
0, 0, 0);
close (newciptr->fd);
xfree (newciptr);
*status = TRANS_ACCEPT_MISC_ERROR;
return NULL;
}
if (TRANS(SocketINETGetPeerAddr) (newciptr) < 0)
{
PRMSG (1,
"SocketINETAccept: ...SocketINETGetPeerAddr() failed:\n",
0, 0, 0);
close (newciptr->fd);
if (newciptr->addr) xfree (newciptr->addr);
xfree (newciptr);
*status = TRANS_ACCEPT_MISC_ERROR;
return NULL;
}
*status = 0;
return newciptr;
}
#endif /* TCPCONN */
#ifdef UNIXCONN
static XtransConnInfo
TRANS(SocketUNIXAccept) (XtransConnInfo ciptr, int *status)
{
XtransConnInfo newciptr;
struct sockaddr_un sockname;
SOCKLEN_T namelen = sizeof sockname;
PRMSG (2, "SocketUNIXAccept(%p,%d)\n", ciptr, ciptr->fd, 0);
if ((newciptr = (XtransConnInfo) xcalloc (
1, sizeof(struct _XtransConnInfo))) == NULL)
{
PRMSG (1, "SocketUNIXAccept: malloc() failed\n", 0, 0, 0);
*status = TRANS_ACCEPT_BAD_MALLOC;
return NULL;
}
if ((newciptr->fd = accept (ciptr->fd,
(struct sockaddr *) &sockname, (void *)&namelen)) < 0)
{
PRMSG (1, "SocketUNIXAccept: accept() failed\n", 0, 0, 0);
xfree (newciptr);
*status = TRANS_ACCEPT_FAILED;
return NULL;
}
ciptr->addrlen = namelen;
/*
* Get the socket name and the peer name from the listener socket,
* since this is unix domain.
*/
if ((newciptr->addr = (char *) xalloc (ciptr->addrlen)) == NULL)
{
PRMSG (1,
"SocketUNIXAccept: Can't allocate space for the addr\n",
0, 0, 0);
close (newciptr->fd);
xfree (newciptr);
*status = TRANS_ACCEPT_BAD_MALLOC;
return NULL;
}
/*
* if the socket is abstract, we already modified the address to have a
* @ instead of the initial NUL, so no need to do that again here.
*/
newciptr->addrlen = ciptr->addrlen;
memcpy (newciptr->addr, ciptr->addr, newciptr->addrlen);
if ((newciptr->peeraddr = (char *) xalloc (ciptr->addrlen)) == NULL)
{
PRMSG (1,
"SocketUNIXAccept: Can't allocate space for the addr\n",
0, 0, 0);
close (newciptr->fd);
if (newciptr->addr) xfree (newciptr->addr);
xfree (newciptr);
*status = TRANS_ACCEPT_BAD_MALLOC;
return NULL;
}
newciptr->peeraddrlen = ciptr->addrlen;
memcpy (newciptr->peeraddr, ciptr->addr, newciptr->addrlen);
newciptr->family = AF_UNIX;
*status = 0;
return newciptr;
}
#endif /* UNIXCONN */
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
#ifdef TCPCONN
#if defined(IPv6) && defined(AF_INET6)
struct addrlist {
struct addrinfo * addr;
struct addrinfo * firstaddr;
char port[PORTBUFSIZE];
char host[MAXHOSTNAMELEN];
};
static struct addrlist *addrlist = NULL;
#endif
static int
TRANS(SocketINETConnect) (XtransConnInfo ciptr, char *host, char *port)
{
struct sockaddr * socketaddr = NULL;
int socketaddrlen = 0;
int res;
#if defined(IPv6) && defined(AF_INET6)
struct addrinfo hints;
char ntopbuf[INET6_ADDRSTRLEN];
int resetonce = 0;
#endif
struct sockaddr_in sockname;
#ifdef XTHREADS_NEEDS_BYNAMEPARAMS
_Xgethostbynameparams hparams;
_Xgetservbynameparams sparams;
#endif
struct hostent *hostp;
struct servent *servp;
unsigned long tmpaddr;
#ifdef X11_t
char portbuf[PORTBUFSIZE];
#endif
long tmpport;
char hostnamebuf[256]; /* tmp space */
PRMSG (2,"SocketINETConnect(%d,%s,%s)\n", ciptr->fd, host, port);
if (!host)
{
hostnamebuf[0] = '\0';
(void) TRANS(GetHostname) (hostnamebuf, sizeof hostnamebuf);
host = hostnamebuf;
}
#ifdef X11_t
/*
* X has a well known port, that is transport dependent. It is easier
* to handle it here, than try and come up with a transport independent
* representation that can be passed in and resolved the usual way.
*
* The port that is passed here is really a string containing the idisplay
* from ConnectDisplay().
*/
if (is_numeric (port))
{
tmpport = X_TCP_PORT + strtol (port, (char**)NULL, 10);
snprintf (portbuf, sizeof(portbuf), "%lu", tmpport);
port = portbuf;
}
#endif
#if defined(IPv6) && defined(AF_INET6)
if (haveIPv6) {
if (addrlist != NULL) {
if (strcmp(host,addrlist->host) || strcmp(port,addrlist->port)) {
if (addrlist->firstaddr)
freeaddrinfo(addrlist->firstaddr);
addrlist->firstaddr = NULL;
}
} else {
addrlist = malloc(sizeof(struct addrlist));
addrlist->firstaddr = NULL;
}
if (addrlist->firstaddr == NULL) {
strncpy(addrlist->port, port, sizeof(addrlist->port));
addrlist->port[sizeof(addrlist->port) - 1] = '\0';
strncpy(addrlist->host, host, sizeof(addrlist->host));
addrlist->host[sizeof(addrlist->host) - 1] = '\0';
bzero(&hints,sizeof(hints));
hints.ai_socktype = Sockettrans2devtab[ciptr->index].devcotsname;
res = getaddrinfo(host,port,&hints,&addrlist->firstaddr);
if (res != 0) {
PRMSG (1, "SocketINETConnect() can't get address "
"for %s:%s: %s\n", host, port, gai_strerror(res));
ESET(EINVAL);
return TRANS_CONNECT_FAILED;
}
for (res = 0, addrlist->addr = addrlist->firstaddr;
addrlist->addr ; res++) {
addrlist->addr = addrlist->addr->ai_next;
}
PRMSG(4,"Got New Address list with %d addresses\n", res, 0, 0);
res = 0;
addrlist->addr = NULL;
}
while (socketaddr == NULL) {
if (addrlist->addr == NULL) {
if (resetonce) {
/* Already checked entire list - no usable addresses */
PRMSG (1, "SocketINETConnect() no usable address "
"for %s:%s\n", host, port, 0);
return TRANS_CONNECT_FAILED;
} else {
/* Go back to beginning of list */
resetonce = 1;
addrlist->addr = addrlist->firstaddr;
}
}
socketaddr = addrlist->addr->ai_addr;
socketaddrlen = addrlist->addr->ai_addrlen;
if (addrlist->addr->ai_family == AF_INET) {
struct sockaddr_in *sin = (struct sockaddr_in *) socketaddr;
PRMSG (4,"SocketINETConnect() sockname.sin_addr = %s\n",
inet_ntop(addrlist->addr->ai_family,&sin->sin_addr,
ntopbuf,sizeof(ntopbuf)), 0, 0);
PRMSG (4,"SocketINETConnect() sockname.sin_port = %d\n",
ntohs(sin->sin_port), 0, 0);
if (Sockettrans2devtab[ciptr->index].family == AF_INET6) {
if (strcmp(Sockettrans2devtab[ciptr->index].transname,
"tcp") == 0) {
XtransConnInfo newciptr;
/*
* Our socket is an IPv6 socket, but the address is
* IPv4. Close it and get an IPv4 socket. This is
* needed for IPv4 connections to work on platforms
* that don't allow IPv4 over IPv6 sockets.
*/
TRANS(SocketINETClose)(ciptr);
newciptr = TRANS(SocketOpenCOTSClientBase)(
"tcp", "tcp", host, port, ciptr->index);
if (newciptr)
ciptr->fd = newciptr->fd;
if (!newciptr ||
Sockettrans2devtab[newciptr->index].family !=
AF_INET) {
socketaddr = NULL;
PRMSG (4,"SocketINETConnect() Cannot get IPv4 "
" socketfor IPv4 address\n", 0,0,0);
}
if (newciptr)
xfree(newciptr);
} else {
socketaddr = NULL;
PRMSG (4,"SocketINETConnect Skipping IPv4 address\n",
0,0,0);
}
}
} else if (addrlist->addr->ai_family == AF_INET6) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) socketaddr;
PRMSG (4,"SocketINETConnect() sockname.sin6_addr = %s\n",
inet_ntop(addrlist->addr->ai_family,
&sin6->sin6_addr,ntopbuf,sizeof(ntopbuf)),
0, 0);
PRMSG (4,"SocketINETConnect() sockname.sin6_port = %d\n",
ntohs(sin6->sin6_port), 0, 0);
if (Sockettrans2devtab[ciptr->index].family == AF_INET) {
if (strcmp(Sockettrans2devtab[ciptr->index].transname,
"tcp") == 0) {
XtransConnInfo newciptr;
/*
* Close the IPv4 socket and try to open an IPv6 socket.
*/
TRANS(SocketINETClose)(ciptr);
newciptr = TRANS(SocketOpenCOTSClientBase)(
"tcp", "tcp", host, port, -1);
if (newciptr)
ciptr->fd = newciptr->fd;
if (!newciptr ||
Sockettrans2devtab[newciptr->index].family !=
AF_INET6) {
socketaddr = NULL;
PRMSG (4,"SocketINETConnect() Cannot get IPv6 "
"socket for IPv6 address\n", 0,0,0);
}
if (newciptr)
xfree(newciptr);
}
else
{
socketaddr = NULL;
PRMSG (4,"SocketINETConnect() Skipping IPv6 address\n",
0,0,0);
}
}
} else {
socketaddr = NULL; /* Unsupported address type */
}
if (socketaddr == NULL) {
addrlist->addr = addrlist->addr->ai_next;
}
}
} else
#endif
{
/*
* Build the socket name.
*/
#ifdef BSD44SOCKETS
sockname.sin_len = sizeof (struct sockaddr_in);
#endif
sockname.sin_family = AF_INET;
/*
* fill in sin_addr
*/
#ifndef INADDR_NONE
#define INADDR_NONE ((in_addr_t) 0xffffffff)
#endif
/* check for ww.xx.yy.zz host string */
if (isascii (host[0]) && isdigit (host[0])) {
tmpaddr = inet_addr (host); /* returns network byte order */
} else {
tmpaddr = INADDR_NONE;
}
PRMSG (4,"SocketINETConnect() inet_addr(%s) = %x\n", host, tmpaddr, 0);
if (tmpaddr == INADDR_NONE) {
if ((hostp = _XGethostbyname(host,hparams)) == NULL) {
PRMSG (1,"SocketINETConnect: Can't get address for %s\n",
host, 0, 0);
ESET(EINVAL);
return TRANS_CONNECT_FAILED;
}
if (hostp->h_addrtype != AF_INET) { /* is IP host? */
PRMSG (1,"SocketINETConnect: not INET host%s\n", host, 0, 0);
ESET(EPROTOTYPE);
return TRANS_CONNECT_FAILED;
}
memcpy ((char *) &sockname.sin_addr, (char *) hostp->h_addr,
sizeof (sockname.sin_addr));
} else {
sockname.sin_addr.s_addr = tmpaddr;
}
/*
* fill in sin_port
*/
/* Check for number in the port string */
if (!is_numeric (port)) {
if ((servp = _XGetservbyname (port,"tcp",sparams)) == NULL) {
PRMSG (1,"SocketINETConnect: can't get service for %s\n",
port, 0, 0);
return TRANS_CONNECT_FAILED;
}
sockname.sin_port = htons (servp->s_port);
} else {
tmpport = strtol (port, (char**)NULL, 10);
if (tmpport < 1024 || tmpport > USHRT_MAX)
return TRANS_CONNECT_FAILED;
sockname.sin_port = htons (((unsigned short) tmpport));
}
PRMSG (4,"SocketINETConnect: sockname.sin_port = %d\n",
ntohs(sockname.sin_port), 0, 0);
socketaddr = (struct sockaddr *) &sockname;
socketaddrlen = sizeof(sockname);
}
/*
* Turn on socket keepalive so the client process will eventually
* be notified with a SIGPIPE signal if the display server fails
* to respond to a periodic transmission of messages
* on the connected socket.
* This is useful to avoid hung application processes when the
* processes are not spawned from the xdm session and
* the display server terminates abnormally.
* (Someone turned off the power switch.)
*/
{
int tmp = 1;
setsockopt (ciptr->fd, SOL_SOCKET, SO_KEEPALIVE,
(char *) &tmp, sizeof (int));
}
/*
* Do the connect()
*/
if (connect (ciptr->fd, socketaddr, socketaddrlen ) < 0)
{
#ifdef WIN32
int olderrno = WSAGetLastError();
#else
int olderrno = errno;
#endif
/*
* If the error was ECONNREFUSED, the server may be overloaded
* and we should try again.
*
* If the error was EWOULDBLOCK or EINPROGRESS then the socket
* was non-blocking and we should poll using select
*
* If the error was EINTR, the connect was interrupted and we
* should try again.
*
* If multiple addresses are found for a host then we should
* try to connect again with a different address for a larger
* number of errors that made us quit before, since those
* could be caused by trying to use an IPv6 address to contact
* a machine with an IPv4-only server or other reasons that
* only affect one of a set of addresses.
*/
if (olderrno == ECONNREFUSED || olderrno == EINTR
#if defined(IPv6) && defined(AF_INET6)
|| (haveIPv6 && ((addrlist->addr->ai_next != NULL) ||
(addrlist->addr != addrlist->firstaddr)) &&
(olderrno == ENETUNREACH || olderrno == EAFNOSUPPORT ||
olderrno == EADDRNOTAVAIL || olderrno == ETIMEDOUT
#if defined(EHOSTDOWN)
|| olderrno == EHOSTDOWN
#endif
))
#endif
)
res = TRANS_TRY_CONNECT_AGAIN;
else if (olderrno == EWOULDBLOCK || olderrno == EINPROGRESS)
res = TRANS_IN_PROGRESS;
else
{
PRMSG (2,"SocketINETConnect: Can't connect: errno = %d\n",
olderrno,0, 0);
res = TRANS_CONNECT_FAILED;
}
} else {
res = 0;
/*
* Sync up the address fields of ciptr.
*/
if (TRANS(SocketINETGetAddr) (ciptr) < 0)
{
PRMSG (1,
"SocketINETConnect: ...SocketINETGetAddr() failed:\n",
0, 0, 0);
res = TRANS_CONNECT_FAILED;
}
else if (TRANS(SocketINETGetPeerAddr) (ciptr) < 0)
{
PRMSG (1,
"SocketINETConnect: ...SocketINETGetPeerAddr() failed:\n",
0, 0, 0);
res = TRANS_CONNECT_FAILED;
}
}
#if defined(IPv6) && defined(AF_INET6)
if (haveIPv6 && res != 0) {
addrlist->addr = addrlist->addr->ai_next;
}
#endif
return res;
}
#endif /* TCPCONN */
#ifdef UNIXCONN
/*
* Make sure 'host' is really local.
*/
static int
UnixHostReallyLocal (char *host)
{
char hostnamebuf[256];
TRANS(GetHostname) (hostnamebuf, sizeof (hostnamebuf));
if (strcmp (hostnamebuf, host) == 0)
{
return (1);
}
#if defined(IPv6) && defined(AF_INET6)
else if (haveIPv6)
{
struct addrinfo *localhostaddr;
struct addrinfo *otherhostaddr;
struct addrinfo *i, *j;
int equiv = 0;
if (getaddrinfo(hostnamebuf, NULL, NULL, &localhostaddr) != 0)
return 0;
if (getaddrinfo(host, NULL, NULL, &otherhostaddr) != 0) {
freeaddrinfo(localhostaddr);
return 0;
}
for (i = localhostaddr; i != NULL && equiv == 0; i = i->ai_next) {
for (j = otherhostaddr; j != NULL && equiv == 0; j = j->ai_next) {
if (i->ai_family == j->ai_family) {
if (i->ai_family == AF_INET) {
struct sockaddr_in *sinA
= (struct sockaddr_in *) i->ai_addr;
struct sockaddr_in *sinB
= (struct sockaddr_in *) j->ai_addr;
struct in_addr *A = &sinA->sin_addr;
struct in_addr *B = &sinB->sin_addr;
if (memcmp(A,B,sizeof(struct in_addr)) == 0) {
equiv = 1;
}
} else if (i->ai_family == AF_INET6) {
struct sockaddr_in6 *sinA
= (struct sockaddr_in6 *) i->ai_addr;
struct sockaddr_in6 *sinB
= (struct sockaddr_in6 *) j->ai_addr;
struct in6_addr *A = &sinA->sin6_addr;
struct in6_addr *B = &sinB->sin6_addr;
if (memcmp(A,B,sizeof(struct in6_addr)) == 0) {
equiv = 1;
}
}
}
}
}
freeaddrinfo(localhostaddr);
freeaddrinfo(otherhostaddr);
return equiv;
}
#endif
else
{
/*
* A host may have more than one network address. If any of the
* network addresses of 'host' (specified to the connect call)
* match any of the network addresses of 'hostname' (determined
* by TRANS(GetHostname)), then the two hostnames are equivalent,
* and we know that 'host' is really a local host.
*/
char specified_local_addr_list[10][4];
int scount, equiv, i, j;
#ifdef XTHREADS_NEEDS_BYNAMEPARAMS
_Xgethostbynameparams hparams;
#endif
struct hostent *hostp;
if ((hostp = _XGethostbyname (host,hparams)) == NULL)
return (0);
scount = 0;
while (hostp->h_addr_list[scount] && scount <= 8)
{
/*
* The 2nd call to gethostname() overrides the data
* from the 1st call, so we must save the address list.
*/
specified_local_addr_list[scount][0] =
hostp->h_addr_list[scount][0];
specified_local_addr_list[scount][1] =
hostp->h_addr_list[scount][1];
specified_local_addr_list[scount][2] =
hostp->h_addr_list[scount][2];
specified_local_addr_list[scount][3] =
hostp->h_addr_list[scount][3];
scount++;
}
if ((hostp = _XGethostbyname (hostnamebuf,hparams)) == NULL)
return (0);
equiv = 0;
i = 0;
while (i < scount && !equiv)
{
j = 0;
while (hostp->h_addr_list[j])
{
if ((specified_local_addr_list[i][0] ==
hostp->h_addr_list[j][0]) &&
(specified_local_addr_list[i][1] ==
hostp->h_addr_list[j][1]) &&
(specified_local_addr_list[i][2] ==
hostp->h_addr_list[j][2]) &&
(specified_local_addr_list[i][3] ==
hostp->h_addr_list[j][3]))
{
/* They're equal, so we're done */
equiv = 1;
break;
}
j++;
}
i++;
}
return (equiv);
}
}
static int
TRANS(SocketUNIXConnect) (XtransConnInfo ciptr, char *host, char *port)
{
struct sockaddr_un sockname;
SOCKLEN_T namelen;
int abstract = 0;
#ifdef HAVE_ABSTRACT_SOCKETS
abstract = ciptr->transptr->flags & TRANS_ABSTRACT;
#endif
PRMSG (2,"SocketUNIXConnect(%d,%s,%s)\n", ciptr->fd, host, port);
/*
* Make sure 'host' is really local. If not, we return failure.
* The reason we make this check is because a process may advertise
* a "local" network ID for which it can accept connections, but if
* a process on a remote machine tries to connect to this network ID,
* we know for sure it will fail.
*/
if (host && *host && host[0]!='/' && strcmp (host, "unix") != 0 && !UnixHostReallyLocal (host))
{
PRMSG (1,
"SocketUNIXConnect: Cannot connect to non-local host %s\n",
host, 0, 0);
return TRANS_CONNECT_FAILED;
}
/*
* Check the port.
*/
if (!port || !*port)
{
PRMSG (1,"SocketUNIXConnect: Missing port specification\n",
0, 0, 0);
return TRANS_CONNECT_FAILED;
}
/*
* Build the socket name.
*/
sockname.sun_family = AF_UNIX;
if (set_sun_path(port, UNIX_PATH, sockname.sun_path, abstract) != 0) {
PRMSG (1, "SocketUNIXConnect: path too long\n", 0, 0, 0);
return TRANS_CONNECT_FAILED;
}
#if (defined(BSD44SOCKETS) || defined(__UNIXWARE__))
sockname.sun_len = strlen (sockname.sun_path);
#endif
#if defined(BSD44SOCKETS) || defined(SUN_LEN)
namelen = SUN_LEN (&sockname);
#else
namelen = strlen (sockname.sun_path) + offsetof(struct sockaddr_un, sun_path);
#endif
/*
* Adjust the socket path if using abstract sockets.
* Done here because otherwise all the strlen() calls above would fail.
*/
if (abstract) {
sockname.sun_path[0] = '\0';
}
/*
* Do the connect()
*/
if (connect (ciptr->fd, (struct sockaddr *) &sockname, namelen) < 0)
{
int olderrno = errno;
int connected = 0;
if (!connected)
{
errno = olderrno;
/*
* If the error was ENOENT, the server may be starting up; we used
* to suggest to try again in this case with
* TRANS_TRY_CONNECT_AGAIN, but this introduced problems for
* processes still referencing stale sockets in their environment.
* Hence, we now return a hard error, TRANS_CONNECT_FAILED, and it
* is suggested that higher level stacks handle retries on their
* level when they face a slow starting server.
*
* If the error was EWOULDBLOCK or EINPROGRESS then the socket
* was non-blocking and we should poll using select
*
* If the error was EINTR, the connect was interrupted and we
* should try again.
*/
if (olderrno == EWOULDBLOCK || olderrno == EINPROGRESS)
return TRANS_IN_PROGRESS;
else if (olderrno == EINTR)
return TRANS_TRY_CONNECT_AGAIN;
else if (olderrno == ENOENT || olderrno == ECONNREFUSED) {
/* If opening as abstract socket failed, try again normally */
if (abstract) {
ciptr->transptr->flags &= ~(TRANS_ABSTRACT);
return TRANS_TRY_CONNECT_AGAIN;
} else {
return TRANS_CONNECT_FAILED;
}
} else {
PRMSG (2,"SocketUNIXConnect: Can't connect: errno = %d\n",
EGET(),0, 0);
return TRANS_CONNECT_FAILED;
}
}
}
/*
* Get the socket name and the peer name from the connect socket,
* since this is unix domain.
*/
if ((ciptr->addr = (char *) xalloc(namelen)) == NULL ||
(ciptr->peeraddr = (char *) xalloc(namelen)) == NULL)
{
PRMSG (1,
"SocketUNIXCreateListener: Can't allocate space for the addr\n",
0, 0, 0);
return TRANS_CONNECT_FAILED;
}
if (abstract)
sockname.sun_path[0] = '@';
ciptr->family = AF_UNIX;
ciptr->addrlen = namelen;
ciptr->peeraddrlen = namelen;
memcpy (ciptr->addr, &sockname, ciptr->addrlen);
memcpy (ciptr->peeraddr, &sockname, ciptr->peeraddrlen);
return 0;
}
#endif /* UNIXCONN */
#endif /* TRANS_CLIENT */
static int
TRANS(SocketBytesReadable) (XtransConnInfo ciptr, BytesReadable_t *pend)
{
PRMSG (2,"SocketBytesReadable(%p,%d,%p)\n",
ciptr, ciptr->fd, pend);
#ifdef WIN32
{
int ret = ioctlsocket ((SOCKET) ciptr->fd, FIONREAD, (u_long *) pend);
if (ret == SOCKET_ERROR) errno = WSAGetLastError();
return ret;
}
#else
#if defined(__i386__) && defined(SYSV) && !defined(SCO325)
return ioctl (ciptr->fd, I_NREAD, (char *) pend);
#else
return ioctl (ciptr->fd, FIONREAD, (char *) pend);
#endif /* __i386__ && SYSV || _SEQUENT_ && _SOCKET_VERSION == 1 */
#endif /* WIN32 */
}
static int
TRANS(SocketRead) (XtransConnInfo ciptr, char *buf, int size)
{
PRMSG (2,"SocketRead(%d,%p,%d)\n", ciptr->fd, buf, size);
#if defined(WIN32)
{
int ret = recv ((SOCKET)ciptr->fd, buf, size, 0);
#ifdef WIN32
if (ret == SOCKET_ERROR) errno = WSAGetLastError();
#endif
return ret;
}
#else
return read (ciptr->fd, buf, size);
#endif /* WIN32 */
}
static int
TRANS(SocketWrite) (XtransConnInfo ciptr, char *buf, int size)
{
PRMSG (2,"SocketWrite(%d,%p,%d)\n", ciptr->fd, buf, size);
#if defined(WIN32)
{
int ret = send ((SOCKET)ciptr->fd, buf, size, 0);
#ifdef WIN32
if (ret == SOCKET_ERROR) errno = WSAGetLastError();
#endif
return ret;
}
#else
return write (ciptr->fd, buf, size);
#endif /* WIN32 */
}
static int
TRANS(SocketReadv) (XtransConnInfo ciptr, struct iovec *buf, int size)
{
PRMSG (2,"SocketReadv(%d,%p,%d)\n", ciptr->fd, buf, size);
return READV (ciptr, buf, size);
}
static int
TRANS(SocketWritev) (XtransConnInfo ciptr, struct iovec *buf, int size)
{
PRMSG (2,"SocketWritev(%d,%p,%d)\n", ciptr->fd, buf, size);
return WRITEV (ciptr, buf, size);
}
static int
TRANS(SocketDisconnect) (XtransConnInfo ciptr)
{
PRMSG (2,"SocketDisconnect(%p,%d)\n", ciptr, ciptr->fd, 0);
#ifdef WIN32
{
int ret = shutdown (ciptr->fd, 2);
if (ret == SOCKET_ERROR) errno = WSAGetLastError();
return ret;
}
#else
return shutdown (ciptr->fd, 2); /* disallow further sends and receives */
#endif
}
#ifdef TCPCONN
static int
TRANS(SocketINETClose) (XtransConnInfo ciptr)
{
PRMSG (2,"SocketINETClose(%p,%d)\n", ciptr, ciptr->fd, 0);
#ifdef WIN32
{
int ret = close (ciptr->fd);
if (ret == SOCKET_ERROR) errno = WSAGetLastError();
return ret;
}
#else
return close (ciptr->fd);
#endif
}
#endif /* TCPCONN */
#ifdef UNIXCONN
static int
TRANS(SocketUNIXClose) (XtransConnInfo ciptr)
{
/*
* If this is the server side, then once the socket is closed,
* it must be unlinked to completely close it
*/
struct sockaddr_un *sockname = (struct sockaddr_un *) ciptr->addr;
int ret;
PRMSG (2,"SocketUNIXClose(%p,%d)\n", ciptr, ciptr->fd, 0);
ret = close(ciptr->fd);
if (ciptr->flags
&& sockname
&& sockname->sun_family == AF_UNIX
&& sockname->sun_path[0])
{
if (!(ciptr->flags & TRANS_NOUNLINK
|| ciptr->transptr->flags & TRANS_ABSTRACT))
unlink (sockname->sun_path);
}
return ret;
}
static int
TRANS(SocketUNIXCloseForCloning) (XtransConnInfo ciptr)
{
/*
* Don't unlink path.
*/
int ret;
PRMSG (2,"SocketUNIXCloseForCloning(%p,%d)\n",
ciptr, ciptr->fd, 0);
ret = close(ciptr->fd);
return ret;
}
#endif /* UNIXCONN */
#ifdef TCPCONN
# ifdef TRANS_SERVER
static char* tcp_nolisten[] = {
"inet",
#if defined(IPv6) && defined(AF_INET6)
"inet6",
#endif
NULL
};
# endif
Xtransport TRANS(SocketTCPFuncs) = {
/* Socket Interface */
"tcp",
TRANS_ALIAS,
#ifdef TRANS_CLIENT
TRANS(SocketOpenCOTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
tcp_nolisten,
TRANS(SocketOpenCOTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketOpenCLTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
TRANS(SocketOpenCLTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_REOPEN
TRANS(SocketReopenCOTSServer),
TRANS(SocketReopenCLTSServer),
#endif
TRANS(SocketSetOption),
#ifdef TRANS_SERVER
TRANS(SocketINETCreateListener),
NULL, /* ResetListener */
TRANS(SocketINETAccept),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketINETConnect),
#endif /* TRANS_CLIENT */
TRANS(SocketBytesReadable),
TRANS(SocketRead),
TRANS(SocketWrite),
TRANS(SocketReadv),
TRANS(SocketWritev),
TRANS(SocketDisconnect),
TRANS(SocketINETClose),
TRANS(SocketINETClose),
};
Xtransport TRANS(SocketINETFuncs) = {
/* Socket Interface */
"inet",
0,
#ifdef TRANS_CLIENT
TRANS(SocketOpenCOTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
NULL,
TRANS(SocketOpenCOTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketOpenCLTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
TRANS(SocketOpenCLTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_REOPEN
TRANS(SocketReopenCOTSServer),
TRANS(SocketReopenCLTSServer),
#endif
TRANS(SocketSetOption),
#ifdef TRANS_SERVER
TRANS(SocketINETCreateListener),
NULL, /* ResetListener */
TRANS(SocketINETAccept),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketINETConnect),
#endif /* TRANS_CLIENT */
TRANS(SocketBytesReadable),
TRANS(SocketRead),
TRANS(SocketWrite),
TRANS(SocketReadv),
TRANS(SocketWritev),
TRANS(SocketDisconnect),
TRANS(SocketINETClose),
TRANS(SocketINETClose),
};
#if defined(IPv6) && defined(AF_INET6)
Xtransport TRANS(SocketINET6Funcs) = {
/* Socket Interface */
"inet6",
0,
#ifdef TRANS_CLIENT
TRANS(SocketOpenCOTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
NULL,
TRANS(SocketOpenCOTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketOpenCLTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
TRANS(SocketOpenCLTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_REOPEN
TRANS(SocketReopenCOTSServer),
TRANS(SocketReopenCLTSServer),
#endif
TRANS(SocketSetOption),
#ifdef TRANS_SERVER
TRANS(SocketINETCreateListener),
NULL, /* ResetListener */
TRANS(SocketINETAccept),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketINETConnect),
#endif /* TRANS_CLIENT */
TRANS(SocketBytesReadable),
TRANS(SocketRead),
TRANS(SocketWrite),
TRANS(SocketReadv),
TRANS(SocketWritev),
TRANS(SocketDisconnect),
TRANS(SocketINETClose),
TRANS(SocketINETClose),
};
#endif /* IPv6 */
#endif /* TCPCONN */
#ifdef UNIXCONN
#if !defined(LOCALCONN)
Xtransport TRANS(SocketLocalFuncs) = {
/* Socket Interface */
"local",
#ifdef HAVE_ABSTRACT_SOCKETS
TRANS_ABSTRACT,
#else
0,
#endif
#ifdef TRANS_CLIENT
TRANS(SocketOpenCOTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
NULL,
TRANS(SocketOpenCOTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketOpenCLTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
TRANS(SocketOpenCLTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_REOPEN
TRANS(SocketReopenCOTSServer),
TRANS(SocketReopenCLTSServer),
#endif
TRANS(SocketSetOption),
#ifdef TRANS_SERVER
TRANS(SocketUNIXCreateListener),
TRANS(SocketUNIXResetListener),
TRANS(SocketUNIXAccept),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketUNIXConnect),
#endif /* TRANS_CLIENT */
TRANS(SocketBytesReadable),
TRANS(SocketRead),
TRANS(SocketWrite),
TRANS(SocketReadv),
TRANS(SocketWritev),
TRANS(SocketDisconnect),
TRANS(SocketUNIXClose),
TRANS(SocketUNIXCloseForCloning),
};
#endif /* !LOCALCONN */
# ifdef TRANS_SERVER
# if !defined(LOCALCONN)
static char* unix_nolisten[] = { "local" , NULL };
# endif
# endif
Xtransport TRANS(SocketUNIXFuncs) = {
/* Socket Interface */
"unix",
#if !defined(LOCALCONN) && !defined(HAVE_ABSTRACT_SOCKETS)
TRANS_ALIAS,
#else
0,
#endif
#ifdef TRANS_CLIENT
TRANS(SocketOpenCOTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
#if !defined(LOCALCONN)
unix_nolisten,
#else
NULL,
#endif
TRANS(SocketOpenCOTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketOpenCLTSClient),
#endif /* TRANS_CLIENT */
#ifdef TRANS_SERVER
TRANS(SocketOpenCLTSServer),
#endif /* TRANS_SERVER */
#ifdef TRANS_REOPEN
TRANS(SocketReopenCOTSServer),
TRANS(SocketReopenCLTSServer),
#endif
TRANS(SocketSetOption),
#ifdef TRANS_SERVER
TRANS(SocketUNIXCreateListener),
TRANS(SocketUNIXResetListener),
TRANS(SocketUNIXAccept),
#endif /* TRANS_SERVER */
#ifdef TRANS_CLIENT
TRANS(SocketUNIXConnect),
#endif /* TRANS_CLIENT */
TRANS(SocketBytesReadable),
TRANS(SocketRead),
TRANS(SocketWrite),
TRANS(SocketReadv),
TRANS(SocketWritev),
TRANS(SocketDisconnect),
TRANS(SocketUNIXClose),
TRANS(SocketUNIXCloseForCloning),
};
#endif /* UNIXCONN */
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