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xdmcp.c
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/*
* Copyright 1989 Network Computing Devices, Inc., Mountain View, California.
*
* 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 of N.C.D. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. N.C.D. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#ifdef WIN32
#include <X11/Xwinsock.h>
#define XSERV_t
#define TRANS_SERVER
#define TRANS_REOPEN
#include <X11/Xtrans/Xtrans.h>
#endif
#include <X11/Xos.h>
#if !defined(WIN32)
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <X11/X.h>
#include <X11/Xmd.h>
#include "misc.h"
#include "osdep.h"
#include "input.h"
#include "dixstruct.h"
#include "opaque.h"
#include "site.h"
#define XSERV_t
#define TRANS_SERVER
#define TRANS_REOPEN
#include <X11/Xtrans/Xtrans.h>
#ifdef XDMCP
#undef REQUEST
#ifdef XDMCP_NO_IPV6
#undef IPv6
#endif
#include <X11/Xdmcp.h>
#define X_INCLUDE_NETDB_H
#include <X11/Xos_r.h>
static const char *defaultDisplayClass = COMPILEDDISPLAYCLASS;
static int xdmcpSocket, sessionSocket;
static xdmcp_states state;
#if defined(IPv6) && defined(AF_INET6)
static int xdmcpSocket6;
static struct sockaddr_storage req_sockaddr;
#else
static struct sockaddr_in req_sockaddr;
#endif
static int req_socklen;
static CARD32 SessionID;
static int timeOutRtx;
static CARD16 DisplayNumber;
static xdmcp_states XDM_INIT_STATE = XDM_OFF;
static OsTimerPtr xdmcp_timer;
#ifdef HASXDMAUTH
static char *xdmAuthCookie;
#endif
static XdmcpBuffer buffer;
#if defined(IPv6) && defined(AF_INET6)
static struct addrinfo *mgrAddr;
static struct addrinfo *mgrAddrFirst;
#define SOCKADDR_TYPE struct sockaddr_storage
#define SOCKADDR_FAMILY(s) ((struct sockaddr *)&(s))->sa_family
#ifdef BSD44SOCKETS
#define SOCKLEN_FIELD(s) ((struct sockaddr *)&(s))->sa_len
#define SOCKLEN_TYPE unsigned char
#else
#define SOCKLEN_TYPE unsigned int
#endif
#else
#define SOCKADDR_TYPE struct sockaddr_in
#define SOCKADDR_FAMILY(s) (s).sin_family
#ifdef BSD44SOCKETS
#define SOCKLEN_FIELD(s) (s).sin_len
#define SOCKLEN_TYPE unsigned char
#else
#define SOCKLEN_TYPE size_t
#endif
#endif
static SOCKADDR_TYPE ManagerAddress;
static SOCKADDR_TYPE FromAddress;
#ifdef SOCKLEN_FIELD
#define ManagerAddressLen SOCKLEN_FIELD(ManagerAddress)
#define FromAddressLen SOCKLEN_FIELD(FromAddress)
#else
static SOCKLEN_TYPE ManagerAddressLen, FromAddressLen;
#endif
#if defined(IPv6) && defined(AF_INET6)
static struct multicastinfo {
struct multicastinfo *next;
struct addrinfo *ai;
int hops;
} *mcastlist;
#endif
static void XdmcpAddHost(const struct sockaddr *from,
int fromlen,
ARRAY8Ptr AuthenticationName,
ARRAY8Ptr hostname, ARRAY8Ptr status);
static void XdmcpSelectHost(const struct sockaddr *host_sockaddr,
int host_len, ARRAY8Ptr AuthenticationName);
static void get_xdmcp_sock(void);
static void send_query_msg(void);
static void recv_willing_msg(struct sockaddr *from,
int fromlen,
unsigned length);
static void send_request_msg(void);
static void recv_accept_msg(unsigned length);
static void recv_decline_msg(unsigned length);
static void send_manage_msg(void);
static void recv_refuse_msg(unsigned length);
static void recv_failed_msg(unsigned length);
static void send_keepalive_msg(void);
static void recv_alive_msg(unsigned length );
static void XdmcpFatal(const char *type,
ARRAY8Ptr status);
static void XdmcpWarning(const char *str);
static void get_manager_by_name(int argc,
char **argv,
int i);
static void get_fromaddr_by_name(int argc,
char **argv,
int i);
#if defined(IPv6) && defined(AF_INET6)
static int get_mcast_options(int argc,
char **argv,
int i);
#endif
static void receive_packet(int socketfd);
static void send_packet(void);
static void timeout(void);
static void XdmcpSocketNotify(int fd, int ready, void *data);
static CARD32 XdmcpTimerNotify(OsTimerPtr timer, CARD32 time, void *arg);
/*
* Register the Manufacturer display ID
*/
static ARRAY8 ManufacturerDisplayID;
static void
XdmcpRegisterManufacturerDisplayID(const char *name, int length)
{
int i;
XdmcpDisposeARRAY8(&ManufacturerDisplayID);
if (!XdmcpAllocARRAY8(&ManufacturerDisplayID, length))
return;
for (i = 0; i < length; i++)
ManufacturerDisplayID.data[i] = (CARD8) name[i];
}
static unsigned short xdm_udp_port = XDM_UDP_PORT;
static Bool OneSession = FALSE;
static const char *xdm_from = NULL;
void
XdmcpUseMsg(void)
{
ErrorF("-query host-name contact named host for XDMCP\n");
ErrorF("-broadcast broadcast for XDMCP\n");
#if defined(IPv6) && defined(AF_INET6)
ErrorF("-multicast [addr [hops]] IPv6 multicast for XDMCP\n");
#endif
ErrorF("-indirect host-name contact named host for indirect XDMCP\n");
ErrorF("-port port-num UDP port number to send messages to\n");
ErrorF
("-from local-address specify the local address to connect from\n");
ErrorF("-once Terminate server after one session\n");
ErrorF("-class display-class specify display class to send in manage\n");
#ifdef HASXDMAUTH
ErrorF("-cookie xdm-auth-bits specify the magic cookie for XDMCP\n");
#endif
ErrorF("-displayID display-id manufacturer display ID for request\n");
}
static void
XdmcpDefaultListen(void)
{
/* Even when configured --disable-listen-tcp, we should listen on tcp in
XDMCP modes */
_XSERVTransListen("tcp");
}
int
XdmcpOptions(int argc, char **argv, int i)
{
if (strcmp(argv[i], "-query") == 0) {
get_manager_by_name(argc, argv, i++);
XDM_INIT_STATE = XDM_QUERY;
AccessUsingXdmcp();
XdmcpDefaultListen();
return i + 1;
}
if (strcmp(argv[i], "-broadcast") == 0) {
XDM_INIT_STATE = XDM_BROADCAST;
AccessUsingXdmcp();
XdmcpDefaultListen();
return i + 1;
}
#if defined(IPv6) && defined(AF_INET6)
if (strcmp(argv[i], "-multicast") == 0) {
i = get_mcast_options(argc, argv, ++i);
XDM_INIT_STATE = XDM_MULTICAST;
AccessUsingXdmcp();
XdmcpDefaultListen();
return i + 1;
}
#endif
if (strcmp(argv[i], "-indirect") == 0) {
get_manager_by_name(argc, argv, i++);
XDM_INIT_STATE = XDM_INDIRECT;
AccessUsingXdmcp();
XdmcpDefaultListen();
return i + 1;
}
if (strcmp(argv[i], "-port") == 0) {
if (++i == argc) {
FatalError("Xserver: missing port number in command line\n");
}
xdm_udp_port = (unsigned short) atoi(argv[i]);
return i + 1;
}
if (strcmp(argv[i], "-from") == 0) {
get_fromaddr_by_name(argc, argv, ++i);
return i + 1;
}
if (strcmp(argv[i], "-once") == 0) {
OneSession = TRUE;
return i + 1;
}
if (strcmp(argv[i], "-class") == 0) {
if (++i == argc) {
FatalError("Xserver: missing class name in command line\n");
}
defaultDisplayClass = argv[i];
return i + 1;
}
#ifdef HASXDMAUTH
if (strcmp(argv[i], "-cookie") == 0) {
if (++i == argc) {
FatalError("Xserver: missing cookie data in command line\n");
}
xdmAuthCookie = argv[i];
return i + 1;
}
#endif
if (strcmp(argv[i], "-displayID") == 0) {
if (++i == argc) {
FatalError("Xserver: missing displayID in command line\n");
}
XdmcpRegisterManufacturerDisplayID(argv[i], strlen(argv[i]));
return i + 1;
}
return i;
}
/*
* This section is a collection of routines for
* registering server-specific data with the XDMCP
* state machine.
*/
/*
* Save all broadcast addresses away so BroadcastQuery
* packets get sent everywhere
*/
#define MAX_BROADCAST 10
/* This stays sockaddr_in since IPv6 doesn't support broadcast */
static struct sockaddr_in BroadcastAddresses[MAX_BROADCAST];
static int NumBroadcastAddresses;
void
XdmcpRegisterBroadcastAddress(const struct sockaddr_in *addr)
{
struct sockaddr_in *bcast;
if (NumBroadcastAddresses >= MAX_BROADCAST)
return;
bcast = &BroadcastAddresses[NumBroadcastAddresses++];
memset(bcast, 0, sizeof(struct sockaddr_in));
#ifdef BSD44SOCKETS
bcast->sin_len = addr->sin_len;
#endif
bcast->sin_family = addr->sin_family;
bcast->sin_port = htons(xdm_udp_port);
bcast->sin_addr = addr->sin_addr;
}
/*
* Each authentication type is registered here; Validator
* will be called to check all access attempts using
* the specified authentication type
*/
static ARRAYofARRAY8 AuthenticationNames, AuthenticationDatas;
typedef struct _AuthenticationFuncs {
ValidatorFunc Validator;
GeneratorFunc Generator;
AddAuthorFunc AddAuth;
} AuthenticationFuncsRec, *AuthenticationFuncsPtr;
static AuthenticationFuncsPtr AuthenticationFuncsList;
void
XdmcpRegisterAuthentication(const char *name,
int namelen,
const char *data,
int datalen,
ValidatorFunc Validator,
GeneratorFunc Generator, AddAuthorFunc AddAuth)
{
int i;
ARRAY8 AuthenticationName, AuthenticationData;
static AuthenticationFuncsPtr newFuncs;
if (!XdmcpAllocARRAY8(&AuthenticationName, namelen))
return;
if (!XdmcpAllocARRAY8(&AuthenticationData, datalen)) {
XdmcpDisposeARRAY8(&AuthenticationName);
return;
}
for (i = 0; i < namelen; i++)
AuthenticationName.data[i] = name[i];
for (i = 0; i < datalen; i++)
AuthenticationData.data[i] = data[i];
if (!(XdmcpReallocARRAYofARRAY8(&AuthenticationNames,
AuthenticationNames.length + 1) &&
XdmcpReallocARRAYofARRAY8(&AuthenticationDatas,
AuthenticationDatas.length + 1) &&
(newFuncs =
malloc((AuthenticationNames.length +
1) * sizeof(AuthenticationFuncsRec))))) {
XdmcpDisposeARRAY8(&AuthenticationName);
XdmcpDisposeARRAY8(&AuthenticationData);
return;
}
for (i = 0; i < AuthenticationNames.length - 1; i++)
newFuncs[i] = AuthenticationFuncsList[i];
newFuncs[AuthenticationNames.length - 1].Validator = Validator;
newFuncs[AuthenticationNames.length - 1].Generator = Generator;
newFuncs[AuthenticationNames.length - 1].AddAuth = AddAuth;
free(AuthenticationFuncsList);
AuthenticationFuncsList = newFuncs;
AuthenticationNames.data[AuthenticationNames.length - 1] =
AuthenticationName;
AuthenticationDatas.data[AuthenticationDatas.length - 1] =
AuthenticationData;
}
/*
* Select the authentication type to be used; this is
* set by the manager of the host to be connected to.
*/
static ARRAY8 noAuthenticationName = { (CARD16) 0, (CARD8Ptr) 0 };
static ARRAY8 noAuthenticationData = { (CARD16) 0, (CARD8Ptr) 0 };
static ARRAY8Ptr AuthenticationName = &noAuthenticationName;
static ARRAY8Ptr AuthenticationData = &noAuthenticationData;
static AuthenticationFuncsPtr AuthenticationFuncs;
static void
XdmcpSetAuthentication(const ARRAY8Ptr name)
{
int i;
for (i = 0; i < AuthenticationNames.length; i++)
if (XdmcpARRAY8Equal(&AuthenticationNames.data[i], name)) {
AuthenticationName = &AuthenticationNames.data[i];
AuthenticationData = &AuthenticationDatas.data[i];
AuthenticationFuncs = &AuthenticationFuncsList[i];
break;
}
}
/*
* Register the host address for the display
*/
static ARRAY16 ConnectionTypes;
static ARRAYofARRAY8 ConnectionAddresses;
static long xdmcpGeneration;
void
XdmcpRegisterConnection(int type, const char *address, int addrlen)
{
int i;
CARD8 *newAddress;
if (xdmcpGeneration != serverGeneration) {
XdmcpDisposeARRAY16(&ConnectionTypes);
XdmcpDisposeARRAYofARRAY8(&ConnectionAddresses);
xdmcpGeneration = serverGeneration;
}
if (xdm_from != NULL) { /* Only register the requested address */
const void *regAddr = address;
const void *fromAddr = NULL;
int regAddrlen = addrlen;
if (addrlen == sizeof(struct in_addr)) {
if (SOCKADDR_FAMILY(FromAddress) == AF_INET) {
fromAddr = &((struct sockaddr_in *) &FromAddress)->sin_addr;
}
#if defined(IPv6) && defined(AF_INET6)
else if ((SOCKADDR_FAMILY(FromAddress) == AF_INET6) &&
IN6_IS_ADDR_V4MAPPED(&
((struct sockaddr_in6 *)
&FromAddress)->sin6_addr)) {
fromAddr =
&((struct sockaddr_in6 *) &FromAddress)->sin6_addr.
s6_addr[12];
}
#endif
}
#if defined(IPv6) && defined(AF_INET6)
else if (addrlen == sizeof(struct in6_addr)) {
if (SOCKADDR_FAMILY(FromAddress) == AF_INET6) {
fromAddr = &((struct sockaddr_in6 *) &FromAddress)->sin6_addr;
}
else if ((SOCKADDR_FAMILY(FromAddress) == AF_INET) &&
IN6_IS_ADDR_V4MAPPED((const struct in6_addr *) address)) {
fromAddr = &((struct sockaddr_in *) &FromAddress)->sin_addr;
regAddr =
&((struct sockaddr_in6 *) address)->sin6_addr.s6_addr[12];
regAddrlen = sizeof(struct in_addr);
}
}
#endif
if (!fromAddr || memcmp(regAddr, fromAddr, regAddrlen) != 0) {
return;
}
}
if (ConnectionAddresses.length + 1 == 256)
return;
newAddress = malloc(addrlen * sizeof(CARD8));
if (!newAddress)
return;
if (!XdmcpReallocARRAY16(&ConnectionTypes, ConnectionTypes.length + 1)) {
free(newAddress);
return;
}
if (!XdmcpReallocARRAYofARRAY8(&ConnectionAddresses,
ConnectionAddresses.length + 1)) {
free(newAddress);
return;
}
ConnectionTypes.data[ConnectionTypes.length - 1] = (CARD16) type;
for (i = 0; i < addrlen; i++)
newAddress[i] = address[i];
ConnectionAddresses.data[ConnectionAddresses.length - 1].data = newAddress;
ConnectionAddresses.data[ConnectionAddresses.length - 1].length = addrlen;
}
/*
* Register an Authorization Name. XDMCP advertises this list
* to the manager.
*/
static ARRAYofARRAY8 AuthorizationNames;
void
XdmcpRegisterAuthorizations(void)
{
XdmcpDisposeARRAYofARRAY8(&AuthorizationNames);
RegisterAuthorizations();
}
void
XdmcpRegisterAuthorization(const char *name, int namelen)
{
ARRAY8 authName;
int i;
authName.data = malloc(namelen * sizeof(CARD8));
if (!authName.data)
return;
if (!XdmcpReallocARRAYofARRAY8
(&AuthorizationNames, AuthorizationNames.length + 1)) {
free(authName.data);
return;
}
for (i = 0; i < namelen; i++)
authName.data[i] = (CARD8) name[i];
authName.length = namelen;
AuthorizationNames.data[AuthorizationNames.length - 1] = authName;
}
/*
* Register the DisplayClass string
*/
static ARRAY8 DisplayClass;
static void
XdmcpRegisterDisplayClass(const char *name, int length)
{
int i;
XdmcpDisposeARRAY8(&DisplayClass);
if (!XdmcpAllocARRAY8(&DisplayClass, length))
return;
for (i = 0; i < length; i++)
DisplayClass.data[i] = (CARD8) name[i];
}
static void
xdmcp_start(void)
{
timeOutRtx = 0;
get_xdmcp_sock();
if (xdmcpSocket >= 0)
SetNotifyFd(xdmcpSocket, XdmcpSocketNotify, X_NOTIFY_READ, NULL);
#if defined(IPv6) && defined(AF_INET6)
if (xdmcpSocket6 >= 0)
SetNotifyFd(xdmcpSocket6, XdmcpSocketNotify, X_NOTIFY_READ, NULL);
#endif
xdmcp_timer = TimerSet(NULL, 0, 0, XdmcpTimerNotify, NULL);
send_packet();
}
/*
* initialize XDMCP; create the socket, compute the display
* number, set up the state machine
*/
void
XdmcpInit(void)
{
state = XDM_INIT_STATE;
#ifdef HASXDMAUTH
if (xdmAuthCookie)
XdmAuthenticationInit(xdmAuthCookie, strlen(xdmAuthCookie));
#endif
if (state != XDM_OFF) {
XdmcpRegisterAuthorizations();
XdmcpRegisterDisplayClass(defaultDisplayClass,
strlen(defaultDisplayClass));
AccessUsingXdmcp();
DisplayNumber = (CARD16) atoi(display);
xdmcp_start();
}
}
void
XdmcpReset(void)
{
state = XDM_INIT_STATE;
if (state != XDM_OFF)
xdmcp_start();
}
/*
* Called whenever a new connection is created; notices the
* first connection and saves it to terminate the session
* when it is closed
*/
void
XdmcpOpenDisplay(int sock)
{
if (state != XDM_AWAIT_MANAGE_RESPONSE)
return;
state = XDM_RUN_SESSION;
TimerSet(xdmcp_timer, 0, XDM_DEF_DORMANCY * 1000, XdmcpTimerNotify, NULL);
sessionSocket = sock;
}
void
XdmcpCloseDisplay(int sock)
{
if ((state != XDM_RUN_SESSION && state != XDM_AWAIT_ALIVE_RESPONSE)
|| sessionSocket != sock)
return;
state = XDM_INIT_STATE;
if (OneSession)
dispatchException |= DE_TERMINATE;
else
dispatchException |= DE_RESET;
isItTimeToYield = TRUE;
}
static void
XdmcpSocketNotify(int fd, int ready, void *data)
{
if (state == XDM_OFF)
return;
receive_packet(fd);
}
static CARD32
XdmcpTimerNotify(OsTimerPtr timer, CARD32 time, void *arg)
{
if (state == XDM_RUN_SESSION) {
state = XDM_KEEPALIVE;
send_packet();
}
else
timeout();
return 0;
}
/*
* This routine should be called from the routine that drives the
* user's host menu when the user selects a host
*/
static void
XdmcpSelectHost(const struct sockaddr *host_sockaddr,
int host_len, ARRAY8Ptr auth_name)
{
state = XDM_START_CONNECTION;
memmove(&req_sockaddr, host_sockaddr, host_len);
req_socklen = host_len;
XdmcpSetAuthentication(auth_name);
send_packet();
}
/*
* !!! this routine should be replaced by a routine that adds
* the host to the user's host menu. the current version just
* selects the first host to respond with willing message.
*/
/*ARGSUSED*/ static void
XdmcpAddHost(const struct sockaddr *from,
int fromlen,
ARRAY8Ptr auth_name, ARRAY8Ptr hostname, ARRAY8Ptr status)
{
XdmcpSelectHost(from, fromlen, auth_name);
}
/*
* A message is queued on the socket; read it and
* do the appropriate thing
*/
static ARRAY8 UnwillingMessage = { (CARD8) 14, (CARD8 *) "Host unwilling" };
static void
receive_packet(int socketfd)
{
#if defined(IPv6) && defined(AF_INET6)
struct sockaddr_storage from;
#else
struct sockaddr_in from;
#endif
int fromlen = sizeof(from);
XdmcpHeader header;
/* read message off socket */
if (!XdmcpFill(socketfd, &buffer, (XdmcpNetaddr) &from, &fromlen))
return;
/* reset retransmission backoff */
timeOutRtx = 0;
if (!XdmcpReadHeader(&buffer, &header))
return;
if (header.version != XDM_PROTOCOL_VERSION)
return;
switch (header.opcode) {
case WILLING:
recv_willing_msg((struct sockaddr *) &from, fromlen, header.length);
break;
case UNWILLING:
XdmcpFatal("Manager unwilling", &UnwillingMessage);
break;
case ACCEPT:
recv_accept_msg(header.length);
break;
case DECLINE:
recv_decline_msg(header.length);
break;
case REFUSE:
recv_refuse_msg(header.length);
break;
case FAILED:
recv_failed_msg(header.length);
break;
case ALIVE:
recv_alive_msg(header.length);
break;
}
}
/*
* send the appropriate message given the current state
*/
static void
send_packet(void)
{
int rtx;
switch (state) {
case XDM_QUERY:
case XDM_BROADCAST:
case XDM_INDIRECT:
#if defined(IPv6) && defined(AF_INET6)
case XDM_MULTICAST:
#endif
send_query_msg();
break;
case XDM_START_CONNECTION:
send_request_msg();
break;
case XDM_MANAGE:
send_manage_msg();
break;
case XDM_KEEPALIVE:
send_keepalive_msg();
break;
default:
break;
}
rtx = (XDM_MIN_RTX << timeOutRtx);
if (rtx > XDM_MAX_RTX)
rtx = XDM_MAX_RTX;
TimerSet(xdmcp_timer, 0, rtx * 1000, XdmcpTimerNotify, NULL);
}
/*
* The session is declared dead for some reason; too many
* timeouts, or Keepalive failure.
*/
static void
XdmcpDeadSession(const char *reason)
{
ErrorF("XDM: %s, declaring session dead\n", reason);
state = XDM_INIT_STATE;
isItTimeToYield = TRUE;
dispatchException |= (OneSession ? DE_TERMINATE : DE_RESET);
TimerCancel(xdmcp_timer);
timeOutRtx = 0;
send_packet();
}
/*
* Timeout waiting for an XDMCP response.
*/
static void
timeout(void)
{
timeOutRtx++;
if (state == XDM_AWAIT_ALIVE_RESPONSE && timeOutRtx >= XDM_KA_RTX_LIMIT) {
XdmcpDeadSession("too many keepalive retransmissions");
return;
}
else if (timeOutRtx >= XDM_RTX_LIMIT) {
/* Quit if "-once" specified, otherwise reset and try again. */
if (OneSession) {
dispatchException |= DE_TERMINATE;
ErrorF("XDM: too many retransmissions\n");
}
else {
XdmcpDeadSession("too many retransmissions");
}
return;
}
#if defined(IPv6) && defined(AF_INET6)
if (state == XDM_COLLECT_QUERY || state == XDM_COLLECT_INDIRECT_QUERY) {
/* Try next address */
for (mgrAddr = mgrAddr->ai_next;; mgrAddr = mgrAddr->ai_next) {
if (mgrAddr == NULL) {
mgrAddr = mgrAddrFirst;
}
if (mgrAddr->ai_family == AF_INET || mgrAddr->ai_family == AF_INET6)
break;
}
#ifndef SIN6_LEN
ManagerAddressLen = mgrAddr->ai_addrlen;
#endif
memcpy(&ManagerAddress, mgrAddr->ai_addr, mgrAddr->ai_addrlen);
}
#endif
switch (state) {
case XDM_COLLECT_QUERY:
state = XDM_QUERY;
break;
case XDM_COLLECT_BROADCAST_QUERY:
state = XDM_BROADCAST;
break;
#if defined(IPv6) && defined(AF_INET6)
case XDM_COLLECT_MULTICAST_QUERY:
state = XDM_MULTICAST;
break;
#endif
case XDM_COLLECT_INDIRECT_QUERY:
state = XDM_INDIRECT;
break;
case XDM_AWAIT_REQUEST_RESPONSE:
state = XDM_START_CONNECTION;
break;
case XDM_AWAIT_MANAGE_RESPONSE:
state = XDM_MANAGE;
break;
case XDM_AWAIT_ALIVE_RESPONSE:
state = XDM_KEEPALIVE;
break;
default:
break;
}
send_packet();
}
static int
XdmcpCheckAuthentication(ARRAY8Ptr Name, ARRAY8Ptr Data, int packet_type)
{
return (XdmcpARRAY8Equal(Name, AuthenticationName) &&
(AuthenticationName->length == 0 ||
(*AuthenticationFuncs->Validator) (AuthenticationData, Data,
packet_type)));
}
static int
XdmcpAddAuthorization(ARRAY8Ptr name, ARRAY8Ptr data)
{
AddAuthorFunc AddAuth;
if (AuthenticationFuncs && AuthenticationFuncs->AddAuth)
AddAuth = AuthenticationFuncs->AddAuth;
else
AddAuth = AddAuthorization;
return (*AddAuth) ((unsigned short) name->length,
(char *) name->data,
(unsigned short) data->length, (char *) data->data);
}
/*
* from here to the end of this file are routines private
* to the state machine.
*/
static void
get_xdmcp_sock(void)
{
int soopts = 1;
#if defined(IPv6) && defined(AF_INET6)
if ((xdmcpSocket6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
XdmcpWarning("INET6 UDP socket creation failed");
#endif
if ((xdmcpSocket = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
XdmcpWarning("UDP socket creation failed");
#ifdef SO_BROADCAST
else if (setsockopt(xdmcpSocket, SOL_SOCKET, SO_BROADCAST, (char *) &soopts,
sizeof(soopts)) < 0)
XdmcpWarning("UDP set broadcast socket-option failed");
#endif /* SO_BROADCAST */
if (xdmcpSocket >= 0 && xdm_from != NULL) {
if (bind(xdmcpSocket, (struct sockaddr *) &FromAddress,
FromAddressLen) < 0) {
FatalError("Xserver: failed to bind to -from address: %s\n",
xdm_from);
}
}
}
static void
send_query_msg(void)
{
XdmcpHeader header;
Bool broadcast = FALSE;
#if defined(IPv6) && defined(AF_INET6)
Bool multicast = FALSE;
#endif
int i;
int socketfd = xdmcpSocket;
header.version = XDM_PROTOCOL_VERSION;
switch (state) {
case XDM_QUERY:
header.opcode = (CARD16) QUERY;
state = XDM_COLLECT_QUERY;
break;
case XDM_BROADCAST:
header.opcode = (CARD16) BROADCAST_QUERY;
state = XDM_COLLECT_BROADCAST_QUERY;
broadcast = TRUE;
break;
#if defined(IPv6) && defined(AF_INET6)
case XDM_MULTICAST:
header.opcode = (CARD16) BROADCAST_QUERY;
state = XDM_COLLECT_MULTICAST_QUERY;
multicast = TRUE;
break;
#endif
case XDM_INDIRECT:
header.opcode = (CARD16) INDIRECT_QUERY;
state = XDM_COLLECT_INDIRECT_QUERY;
break;
default:
break;
}
header.length = 1;
for (i = 0; i < AuthenticationNames.length; i++)
header.length += 2 + AuthenticationNames.data[i].length;
XdmcpWriteHeader(&buffer, &header);
XdmcpWriteARRAYofARRAY8(&buffer, &AuthenticationNames);
if (broadcast) {
for (i = 0; i < NumBroadcastAddresses; i++)
XdmcpFlush(xdmcpSocket, &buffer,
(XdmcpNetaddr) &BroadcastAddresses[i],
sizeof(struct sockaddr_in));
}
#if defined(IPv6) && defined(AF_INET6)
else if (multicast) {
struct multicastinfo *mcl;
struct addrinfo *ai;
for (mcl = mcastlist; mcl != NULL; mcl = mcl->next) {
for (ai = mcl->ai; ai != NULL; ai = ai->ai_next) {
if (ai->ai_family == AF_INET) {
unsigned char hopflag = (unsigned char) mcl->hops;
socketfd = xdmcpSocket;
setsockopt(socketfd, IPPROTO_IP, IP_MULTICAST_TTL,
&hopflag, sizeof(hopflag));
}
else if (ai->ai_family == AF_INET6) {
int hopflag6 = mcl->hops;
socketfd = xdmcpSocket6;
setsockopt(socketfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
&hopflag6, sizeof(hopflag6));
}
else {