ARRAY8Ptr
IndirectChoice (
ARRAY8Ptr clientAddress,
CARD16 connectionType)
{
ChoicePtr c, next, prev;
long now;
now = time (0);
prev = 0;
for (c = choices; c; c = next)
{
next = c->next;
if (now - c->time > 15)
{
Debug ("Timeout choice\n");
if (prev)
prev->next = next;
else
choices = next;
XdmcpDisposeARRAY8 (&c->client);
XdmcpDisposeARRAY8 (&c->choice);
free ((char *) c);
}
else
{
if (XdmcpARRAY8Equal (clientAddress, &c->client) &&
connectionType == c->connectionType)
return &c->choice;
prev = c;
}
}
return 0;
}
static void
recv_decline_msg(unsigned length)
{
ARRAY8 status, DeclineAuthenticationName, DeclineAuthenticationData;
status.data = 0;
DeclineAuthenticationName.data = 0;
DeclineAuthenticationData.data = 0;
if (XdmcpReadARRAY8 (&buffer, &status) &&
XdmcpReadARRAY8 (&buffer, &DeclineAuthenticationName) &&
XdmcpReadARRAY8 (&buffer, &DeclineAuthenticationData))
{
if (length == 6 + status.length +
DeclineAuthenticationName.length +
DeclineAuthenticationData.length &&
XdmcpCheckAuthentication (&DeclineAuthenticationName,
&DeclineAuthenticationData, DECLINE))
{
XdmcpFatal ("Session declined", &status);
}
}
XdmcpDisposeARRAY8 (&status);
XdmcpDisposeARRAY8 (&DeclineAuthenticationName);
XdmcpDisposeARRAY8 (&DeclineAuthenticationData);
}
static int
RegisterIndirectChoice (
ARRAY8Ptr clientAddress,
CARD16 connectionType,
ARRAY8Ptr choice)
{
ChoicePtr c;
int insert;
int found;
Debug ("Got indirect choice back (%s)\n", Print8Address(clientAddress));
for (c = choices; c; c = c->next) {
if (XdmcpARRAY8Equal (clientAddress, &c->client) &&
connectionType == c->connectionType) {
found = 1;
break;
}
}
if (!found)
return 0;
insert = 0;
if (!c)
{
c = (ChoicePtr) malloc (sizeof (ChoiceRec));
insert = 1;
if (!c)
return 0;
c->connectionType = connectionType;
if (!XdmcpCopyARRAY8 (clientAddress, &c->client))
{
free ((char *) c);
return 0;
}
}
else
{
XdmcpDisposeARRAY8 (&c->choice);
}
if (!XdmcpCopyARRAY8 (choice, &c->choice))
{
XdmcpDisposeARRAY8 (&c->client);
free ((char *) c);
return 0;
}
if (insert)
{
c->next = choices;
choices = c;
}
c->time = time (0);
Debug("choice=(%s)\n", Print8Address(choice));
return 1;
}
static void
recv_accept_msg(unsigned length)
{
CARD32 AcceptSessionID;
ARRAY8 AcceptAuthenticationName, AcceptAuthenticationData;
ARRAY8 AcceptAuthorizationName, AcceptAuthorizationData;
if (state != XDM_AWAIT_REQUEST_RESPONSE)
return;
AcceptAuthenticationName.data = 0;
AcceptAuthenticationData.data = 0;
AcceptAuthorizationName.data = 0;
AcceptAuthorizationData.data = 0;
if (XdmcpReadCARD32 (&buffer, &AcceptSessionID) &&
XdmcpReadARRAY8 (&buffer, &AcceptAuthenticationName) &&
XdmcpReadARRAY8 (&buffer, &AcceptAuthenticationData) &&
XdmcpReadARRAY8 (&buffer, &AcceptAuthorizationName) &&
XdmcpReadARRAY8 (&buffer, &AcceptAuthorizationData))
{
if (length == 12 + AcceptAuthenticationName.length +
AcceptAuthenticationData.length +
AcceptAuthorizationName.length +
AcceptAuthorizationData.length)
{
if (!XdmcpCheckAuthentication (&AcceptAuthenticationName,
&AcceptAuthenticationData, ACCEPT))
{
XdmcpFatal ("Authentication Failure", &AcceptAuthenticationName);
}
/* permit access control manipulations from this host */
AugmentSelf (&req_sockaddr, req_socklen);
/* if the authorization specified in the packet fails
* to be acceptable, enable the local addresses
*/
if (!XdmcpAddAuthorization (&AcceptAuthorizationName,
&AcceptAuthorizationData))
{
AddLocalHosts ();
}
SessionID = AcceptSessionID;
state = XDM_MANAGE;
send_packet();
}
}
XdmcpDisposeARRAY8 (&AcceptAuthenticationName);
XdmcpDisposeARRAY8 (&AcceptAuthenticationData);
XdmcpDisposeARRAY8 (&AcceptAuthorizationName);
XdmcpDisposeARRAY8 (&AcceptAuthorizationData);
}
static void all_query_respond(struct sockaddr *from, int fromlen, ARRAYofARRAY8Ptr authenticationNames, xdmOpCode type, int fd)
{
ARRAY8Ptr authenticationName;
ARRAY8 status;
ARRAY8 addr;
CARD16 connectionType;
int family;
int length;
family = ConvertAddr((XdmcpNetaddr)from, &length, &(addr.data));
addr.length = length; /* convert int to short */
Debug("all_query_respond: conntype=%d, addr=%02[*:hhx\n", family, addr.length, addr.data);
if(family < 0)
return;
connectionType = family;
if(type == INDIRECT_QUERY)
RememberIndirectClient(&addr, connectionType);
else
ForgetIndirectClient(&addr, connectionType);
authenticationName = ChooseAuthentication(authenticationNames);
if(Willing(&addr, connectionType, authenticationName, &status, type))
send_willing(from, fromlen, authenticationName, &status, fd);
else if(type == QUERY)
send_unwilling(from, fromlen, authenticationName, &status, fd);
XdmcpDisposeARRAY8(&status);
}
static void indirect_respond(struct sockaddr *from, int fromlen, int length, int fd)
{
ARRAYofARRAY8 queryAuthenticationNames;
ARRAY8 clientAddress;
ARRAY8 clientPort;
CARD16 connectionType;
int expectedLen;
int i;
XdmcpHeader header;
int localHostAsWell;
Debug("<indirect> respond %d\n", length);
if(!XdmcpReadARRAYofARRAY8(&buffer, &queryAuthenticationNames))
return;
expectedLen = 1;
for(i = 0; i < (int)queryAuthenticationNames.length; i++)
expectedLen += 2 + queryAuthenticationNames.data[i].length;
if(length == expectedLen)
{
ClientAddress(from, &clientAddress, &clientPort, &connectionType);
/*
* set up the forward query packet
*/
header.version = XDM_PROTOCOL_VERSION;
header.opcode = (CARD16)FORWARD_QUERY;
header.length = 0;
header.length += 2 + clientAddress.length;
header.length += 2 + clientPort.length;
header.length += 1;
for(i = 0; i < (int)queryAuthenticationNames.length; i++)
header.length += 2 + queryAuthenticationNames.data[i].length;
XdmcpWriteHeader(&buffer, &header);
XdmcpWriteARRAY8(&buffer, &clientAddress);
XdmcpWriteARRAY8(&buffer, &clientPort);
XdmcpWriteARRAYofARRAY8(&buffer, &queryAuthenticationNames);
localHostAsWell = ForEachMatchingIndirectHost(&clientAddress, connectionType, sendForward, (char *)fd);
XdmcpDisposeARRAY8(&clientAddress);
XdmcpDisposeARRAY8(&clientPort);
if(localHostAsWell)
all_query_respond(from, fromlen, &queryAuthenticationNames, INDIRECT_QUERY, fd);
}
else
Debug("<indirect> length error got %d expect %d\n", length, expectedLen);
XdmcpDisposeARRAYofARRAY8(&queryAuthenticationNames);
}
void
XdmcpRegisterAuthentication (
char *name,
int namelen,
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 = (AuthenticationFuncsPtr) xalloc (
(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;
xfree (AuthenticationFuncsList);
AuthenticationFuncsList = newFuncs;
AuthenticationNames.data[AuthenticationNames.length-1] = AuthenticationName;
AuthenticationDatas.data[AuthenticationDatas.length-1] = AuthenticationData;
}
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 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
recv_willing_msg(
struct sockaddr *from,
int fromlen,
unsigned length)
{
ARRAY8 authenticationName;
ARRAY8 hostname;
ARRAY8 status;
authenticationName.data = 0;
hostname.data = 0;
status.data = 0;
if (XdmcpReadARRAY8 (&buffer, &authenticationName) &&
XdmcpReadARRAY8 (&buffer, &hostname) &&
XdmcpReadARRAY8 (&buffer, &status))
{
if (length == 6 + authenticationName.length +
hostname.length + status.length)
{
switch (state)
{
case XDM_COLLECT_QUERY:
XdmcpSelectHost(from, fromlen, &authenticationName);
break;
case XDM_COLLECT_BROADCAST_QUERY:
#if defined(IPv6) && defined(AF_INET6)
case XDM_COLLECT_MULTICAST_QUERY:
#endif
case XDM_COLLECT_INDIRECT_QUERY:
XdmcpAddHost(from, fromlen, &authenticationName, &hostname, &status);
break;
default:
break;
}
}
}
XdmcpDisposeARRAY8 (&authenticationName);
XdmcpDisposeARRAY8 (&hostname);
XdmcpDisposeARRAY8 (&status);
}
void RemoveDisplay(struct display *old)
{
struct display *d, **dp;
int i;
for(dp = &displays; (d = *dp); dp = &(*dp)->next)
{
if(d == old)
{
Debug("Removing display %s\n", d->name);
*dp = d->next;
IfFree(d->class2);
IfFree(d->cfg.data);
delStr(d->cfg.dep.name);
#ifdef XDMCP
IfFree(d->remoteHost);
#endif
if(d->authorizations)
{
for(i = 0; i < d->authNum; i++)
XauDisposeAuth(d->authorizations[i]);
free((char *)d->authorizations);
}
if(d->authFile)
{
(void)unlink(d->authFile);
free(d->authFile);
}
IfFree(d->authNameLens);
#ifdef XDMCP
XdmcpDisposeARRAY8(&d->peer);
XdmcpDisposeARRAY8(&d->from);
XdmcpDisposeARRAY8(&d->clientAddr);
#endif
free((char *)d);
break;
}
}
}
static void
FreeHostEntry (HostEntry *h)
{
switch (h->type) {
case HOST_ALIAS:
free (h->entry.aliasName);
break;
case HOST_ADDRESS:
XdmcpDisposeARRAY8 (&h->entry.hostAddress);
break;
case HOST_CHOOSER:
break;
}
free (h);
}
static void
recv_failed_msg(unsigned length)
{
CARD32 FailedSessionID;
ARRAY8 status;
if (state != XDM_AWAIT_MANAGE_RESPONSE)
return;
status.data = 0;
if (XdmcpReadCARD32(&buffer, &FailedSessionID) &&
XdmcpReadARRAY8(&buffer, &status)) {
if (length == 6 + status.length && SessionID == FailedSessionID) {
XdmcpFatal("Session failed", &status);
}
}
XdmcpDisposeARRAY8(&status);
}
static void freeDisplay(struct display *d)
{
char **x;
int i;
IfFree(d->name);
IfFree(d->class);
for (x = d->argv; x && *x; x++)
IfFree(*x);
IfFree(d->argv);
IfFree(d->resources);
IfFree(d->xrdb);
IfFree(d->setup);
IfFree(d->startup);
IfFree(d->reset);
IfFree(d->session);
IfFree(d->userPath);
IfFree(d->systemPath);
IfFree(d->systemShell);
IfFree(d->failsafeClient);
IfFree(d->chooser);
if (d->authorizations) {
for (i = 0; i < d->authNum; i++)
XauDisposeAuth(d->authorizations[i]);
free(d->authorizations);
}
IfFree(d->clientAuthFile);
if (d->authFile)
(void)unlink(d->authFile);
IfFree(d->authFile);
IfFree(d->userAuthDir);
for (x = d->authNames; x && *x; x++)
IfFree(*x);
IfFree(d->authNames);
IfFree(d->authNameLens);
#ifdef XDMCP
IfFree(d->peer);
IfFree(d->from);
XdmcpDisposeARRAY8(&d->clientAddr);
#endif
free(d);
}
static void
FreeDisplayEntry (DisplayEntry *d)
{
HostEntry *h, *next;
switch (d->type) {
case DISPLAY_ALIAS:
free (d->entry.aliasName);
break;
case DISPLAY_PATTERN:
free (d->entry.displayPattern);
break;
case DISPLAY_ADDRESS:
XdmcpDisposeARRAY8 (&d->entry.displayAddress.clientAddress);
break;
}
for (h = d->hosts; h; h = next) {
next = h->next;
FreeHostEntry (h);
}
free ((char *) d);
}
ForgetIndirectClient (
ARRAY8Ptr clientAddress,
CARD16 connectionType)
{
IndirectUsersPtr i, prev;
prev = 0;
for (i = indirectUsers; i; i = i->next)
{
if (XdmcpARRAY8Equal (clientAddress, &i->client) &&
connectionType == i->connectionType)
{
if (prev)
prev->next = i->next;
else
indirectUsers = i->next;
XdmcpDisposeARRAY8 (&i->client);
free ((char *) i);
break;
}
prev = i;
}
}
static void
FreeDisplayEntry (DisplayEntry *d)
{
HostEntry *h, *next;
switch (d->type) {
case DISPLAY_ALIAS:
free (d->entry.aliasName);
break;
case DISPLAY_PATTERN:
free (d->entry.displayPattern);
break;
case DISPLAY_ADDRESS:
XdmcpDisposeARRAY8 (&d->entry.displayAddress.clientAddress);
break;
case DISPLAY_LISTEN:
/* do nothing - this case doesn't use the d->entry union */
break;
}
for (h = d->hosts; h; h = next) {
next = h->next;
FreeHostEntry (h);
}
free (d);
}
static void
processDPipe( struct display *d )
{
char *user, *pass, *args;
int cmd;
GTalk dpytalk;
#ifdef XDMCP
int ct, len;
ARRAY8 ca, ha;
#endif
dpytalk.pipe = &d->pipe;
if (Setjmp( dpytalk.errjmp )) {
StopDisplay( d );
return;
}
GSet( &dpytalk );
if (!GRecvCmd( &cmd )) {
/* process already exited */
UnregisterInput( d->pipe.rfd );
return;
}
switch (cmd) {
case D_User:
d->userSess = GRecvInt();
d->userName = GRecvStr();
d->sessName = GRecvStr();
break;
case D_ReLogin:
user = GRecvStr();
pass = GRecvStr();
args = GRecvStr();
setNLogin( d, user, pass, args, 1 );
free( args );
free( pass );
free( user );
break;
#ifdef XDMCP
case D_ChooseHost:
ca.data = (unsigned char *)GRecvArr( &len );
ca.length = (CARD16)len;
ct = GRecvInt();
ha.data = (unsigned char *)GRecvArr( &len );
ha.length = (CARD16)len;
RegisterIndirectChoice( &ca, ct, &ha );
XdmcpDisposeARRAY8( &ha );
XdmcpDisposeARRAY8( &ca );
break;
case D_RemoteHost:
if (d->remoteHost)
free( d->remoteHost );
d->remoteHost = GRecvStr();
break;
#endif
case D_XConnOk:
startingServer = 0;
break;
default:
LogError( "Internal error: unknown D_* command %d\n", cmd );
StopDisplay( d );
break;
}
}
/*ARGSUSED*/
static void forward_respond(struct sockaddr *from, int fromlen ATTR_UNUSED, int length, int fd)
{
ARRAY8 clientAddress;
ARRAY8 clientPort;
ARRAYofARRAY8 authenticationNames;
struct sockaddr *client;
int clientlen;
int expectedLen;
int i;
Debug("<forward> respond %d\n", length);
clientAddress.length = 0;
clientAddress.data = 0;
clientPort.length = 0;
clientPort.data = 0;
authenticationNames.length = 0;
authenticationNames.data = 0;
if(XdmcpReadARRAY8(&buffer, &clientAddress) && XdmcpReadARRAY8(&buffer, &clientPort) && XdmcpReadARRAYofARRAY8(&buffer, &authenticationNames))
{
expectedLen = 0;
expectedLen += 2 + clientAddress.length;
expectedLen += 2 + clientPort.length;
expectedLen += 1; /* authenticationNames */
for(i = 0; i < (int)authenticationNames.length; i++)
expectedLen += 2 + authenticationNames.data[i].length;
if(length == expectedLen)
{
int j;
j = 0;
for(i = 0; i < (int)clientPort.length; i++)
j = j * 256 + clientPort.data[i];
Debug("<forward> client address (port %d) %[*hhu\n", j, clientAddress.length, clientAddress.data);
switch(from->sa_family)
{
#ifdef AF_INET
case AF_INET:
{
struct sockaddr_in in_addr;
if(clientAddress.length != 4 || clientPort.length != 2)
goto badAddress;
bzero((char *)&in_addr, sizeof(in_addr));
#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
in_addr.sin_len = sizeof(in_addr);
#endif
in_addr.sin_family = AF_INET;
memmove(&in_addr.sin_addr, clientAddress.data, 4);
memmove((char *)&in_addr.sin_port, clientPort.data, 2);
client = (struct sockaddr *)&in_addr;
clientlen = sizeof(in_addr);
all_query_respond(client, clientlen, &authenticationNames, FORWARD_QUERY, fd);
}
break;
#endif
#if defined(IPv6) && defined(AF_INET6)
case AF_INET6:
{
struct sockaddr_in6 in6_addr;
if(clientAddress.length != 16 || clientPort.length != 2)
goto badAddress;
bzero((char *)&in6_addr, sizeof(in6_addr));
#ifdef SIN6_LEN
in6_addr.sin6_len = sizeof(in6_addr);
#endif
in6_addr.sin6_family = AF_INET6;
memmove(&in6_addr, clientAddress.data, clientAddress.length);
memmove((char *)&in6_addr.sin6_port, clientPort.data, 2);
client = (struct sockaddr *)&in6_addr;
clientlen = sizeof(in6_addr);
all_query_respond(client, clientlen, &authenticationNames, FORWARD_QUERY, fd);
}
break;
#endif
#ifdef AF_UNIX
case AF_UNIX:
{
struct sockaddr_un un_addr;
if(clientAddress.length >= sizeof(un_addr.sun_path))
goto badAddress;
bzero((char *)&un_addr, sizeof(un_addr));
un_addr.sun_family = AF_UNIX;
memmove(un_addr.sun_path, clientAddress.data, clientAddress.length);
un_addr.sun_path[clientAddress.length] = '\0';
client = (struct sockaddr *)&un_addr;
#if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) && !defined(__Lynx__) && defined(UNIXCONN)
un_addr.sun_len = strlen(un_addr.sun_path);
clientlen = SUN_LEN(&un_addr);
#else
clientlen = sizeof(un_addr);
#endif
all_query_respond(client, clientlen, &authenticationNames, FORWARD_QUERY, fd);
}
break;
#endif
#ifdef AF_CHAOS
case AF_CHAOS:
goto badAddress;
#endif
#ifdef AF_DECnet
case AF_DECnet:
goto badAddress;
#endif
}
}
else
Debug("<forward> length error got %d expect %d\n", length, expectedLen);
}
badAddress:
XdmcpDisposeARRAY8(&clientAddress);
XdmcpDisposeARRAY8(&clientPort);
XdmcpDisposeARRAYofARRAY8(&authenticationNames);
}
static void request_respond(struct sockaddr *from, int fromlen, int length, int fd)
{
CARD16 displayNumber;
ARRAY16 connectionTypes;
ARRAYofARRAY8 connectionAddresses;
ARRAY8 authenticationName;
ARRAY8 authenticationData;
ARRAYofARRAY8 authorizationNames;
ARRAY8 manufacturerDisplayID;
ARRAY8Ptr reason = 0;
int expectlen;
int i, j;
struct protoDisplay *pdpy;
ARRAY8 authorizationName, authorizationData;
ARRAY8Ptr connectionAddress;
Debug("<request> respond %d\n", length);
connectionTypes.data = 0;
connectionAddresses.data = 0;
authenticationName.data = 0;
authenticationData.data = 0;
authorizationNames.data = 0;
authorizationName.length = 0;
authorizationData.length = 0;
manufacturerDisplayID.data = 0;
if(XdmcpReadCARD16(&buffer, &displayNumber) && XdmcpReadARRAY16(&buffer, &connectionTypes)
&& XdmcpReadARRAYofARRAY8(&buffer, &connectionAddresses) && XdmcpReadARRAY8(&buffer, &authenticationName)
&& XdmcpReadARRAY8(&buffer, &authenticationData) && XdmcpReadARRAYofARRAY8(&buffer, &authorizationNames)
&& XdmcpReadARRAY8(&buffer, &manufacturerDisplayID))
{
expectlen = 0;
expectlen += 2; /* displayNumber */
expectlen += 1 + 2 * connectionTypes.length; /* connectionTypes */
expectlen += 1; /* connectionAddresses */
for(i = 0; i < (int)connectionAddresses.length; i++)
expectlen += 2 + connectionAddresses.data[i].length;
expectlen += 2 + authenticationName.length; /* authenticationName */
expectlen += 2 + authenticationData.length; /* authenticationData */
expectlen += 1; /* authoriationNames */
for(i = 0; i < (int)authorizationNames.length; i++)
expectlen += 2 + authorizationNames.data[i].length;
expectlen += 2 + manufacturerDisplayID.length; /* displayID */
if(expectlen != length)
{
Debug("<request> length error got %d expect %d\n", length, expectlen);
goto abort;
}
if(connectionTypes.length == 0 || connectionAddresses.length != connectionTypes.length)
{
reason = &noValidAddr;
pdpy = 0;
goto decline;
}
pdpy = FindProtoDisplay((XdmcpNetaddr)from, fromlen, displayNumber);
if(!pdpy)
{
/* Check this Display against the Manager's policy */
reason = Accept(from, fromlen, displayNumber);
if(reason)
goto decline;
/* Check the Display's stream services against Manager's policy */
i = SelectConnectionTypeIndex(&connectionTypes, &connectionAddresses);
if(i < 0)
{
reason = &noValidAddr;
goto decline;
}
/* The Manager considers this a new session */
connectionAddress = &connectionAddresses.data[i];
pdpy = NewProtoDisplay((XdmcpNetaddr)from, fromlen, displayNumber, connectionTypes.data[i], connectionAddress, NextSessionID());
Debug("NewProtoDisplay %p\n", pdpy);
if(!pdpy)
{
reason = &outOfMemory;
goto decline;
}
}
if(authorizationNames.length == 0)
j = 0;
else
j = SelectAuthorizationTypeIndex(&authenticationName, &authorizationNames);
if(j < 0)
{
reason = &noValidAuth;
goto decline;
}
if(!CheckAuthentication(pdpy, &manufacturerDisplayID, &authenticationName, &authenticationData))
{
reason = &noAuthentic;
goto decline;
}
if(j < (int)authorizationNames.length)
{
Xauth *auth;
SetProtoDisplayAuthorization(pdpy, (unsigned short)authorizationNames.data[j].length, (char *)authorizationNames.data[j].data);
auth = pdpy->xdmcpAuthorization;
if(!auth)
auth = pdpy->fileAuthorization;
if(auth)
{
authorizationName.length = auth->name_length;
authorizationName.data = (CARD8Ptr)auth->name;
authorizationData.length = auth->data_length;
authorizationData.data = (CARD8Ptr)auth->data;
}
}
if(pdpy)
{
send_accept(from, fromlen, pdpy->sessionID, &authenticationName, &authenticationData, &authorizationName, &authorizationData, fd);
}
else
{
decline:
send_decline(from, fromlen, &authenticationName, &authenticationData, reason, fd);
if(pdpy)
DisposeProtoDisplay(pdpy);
}
}
abort:
XdmcpDisposeARRAY16(&connectionTypes);
XdmcpDisposeARRAYofARRAY8(&connectionAddresses);
XdmcpDisposeARRAY8(&authenticationName);
XdmcpDisposeARRAY8(&authenticationData);
XdmcpDisposeARRAYofARRAY8(&authorizationNames);
XdmcpDisposeARRAY8(&manufacturerDisplayID);
}
static void manage(struct sockaddr *from, int fromlen, int length, int fd)
{
CARD32 sessionID;
CARD16 displayNumber;
ARRAY8 displayClass;
int expectlen;
struct protoDisplay *pdpy;
struct display *d;
char *name = NULL;
char *class2 = NULL;
XdmcpNetaddr from_save;
ARRAY8 clientAddress, clientPort;
CARD16 connectionType;
Debug("<manage> %d\n", length);
displayClass.data = 0;
displayClass.length = 0;
if(XdmcpReadCARD32(&buffer, &sessionID) && XdmcpReadCARD16(&buffer, &displayNumber) && XdmcpReadARRAY8(&buffer, &displayClass))
{
expectlen = 4 + /* session ID */
2 + /* displayNumber */
2 + displayClass.length; /* displayClass */
if(expectlen != length)
{
Debug("<manage> length error got %d expect %d\n", length, expectlen);
goto abort;
}
pdpy = FindProtoDisplay((XdmcpNetaddr)from, fromlen, displayNumber);
Debug("<manage> session ID %ld, pdpy %p\n", (long)sessionID, pdpy);
if(!pdpy || pdpy->sessionID != sessionID)
{
/*
* We may have already started a session for this display
* but it hasn't seen the response in the form of an
* XOpenDisplay() yet. So check if it is in the list of active
* displays, and if so check that the session id's match.
* If all this is true, then we have a duplicate request that
* can be ignored.
*/
if(!pdpy && (d = FindDisplayByAddress((XdmcpNetaddr)from, fromlen, displayNumber)) && d->sessionID == sessionID)
{
Debug("manage: got duplicate pkt, ignoring\n");
goto abort;
}
Debug("session ID %ld refused\n", (long)sessionID);
if(pdpy)
Debug("existing session ID %ld\n", (long)pdpy->sessionID);
send_refuse(from, fromlen, sessionID, fd);
}
else
{
name = NetworkAddressToName(pdpy->connectionType, &pdpy->connectionAddress, from, pdpy->displayNumber);
if(!name)
{
Debug("could not compute display name\n");
send_failed(from, fromlen, "(no name)", sessionID, "out of memory", fd);
goto abort;
}
Debug("computed display name: %s\n", name);
if((d = FindDisplayByName(name)))
{
Debug("terminating active session for %s\n", d->name);
StopDisplay(d);
}
if(displayClass.length)
{
if(!StrNDup(&class2, (char *)displayClass.data, displayClass.length))
{
send_failed(from, fromlen, name, sessionID, "out of memory", fd);
goto abort;
}
}
if(!(from_save = (XdmcpNetaddr)Malloc(fromlen)))
{
send_failed(from, fromlen, name, sessionID, "out of memory", fd);
goto abort;
}
memmove(from_save, from, fromlen);
if(!(d = NewDisplay(name)))
{
free((char *)from_save);
send_failed(from, fromlen, name, sessionID, "out of memory", fd);
goto abort;
}
d->class2 = class2;
class2 = 0;
d->displayType = dForeign | dTransient | dFromXDMCP;
d->sessionID = pdpy->sessionID;
d->from.data = (unsigned char *)from_save;
d->from.length = fromlen;
d->displayNumber = pdpy->displayNumber;
ClientAddress(from, &clientAddress, &clientPort, &connectionType);
d->useChooser = 0;
d->xdmcpFd = fd;
if(IsIndirectClient(&clientAddress, connectionType))
{
Debug("IsIndirectClient\n");
ForgetIndirectClient(&clientAddress, connectionType);
if(UseChooser(&clientAddress, connectionType))
{
d->useChooser = 1;
Debug("use chooser for %s\n", d->name);
}
}
d->clientAddr = clientAddress;
d->connectionType = connectionType;
d->remoteHost = NetworkAddressToHostname(pdpy->connectionType, &pdpy->connectionAddress);
XdmcpDisposeARRAY8(&clientPort);
if(pdpy->fileAuthorization)
{
d->authorizations = (Xauth **)Malloc(sizeof(Xauth *));
if(!d->authorizations)
{
free((char *)from_save);
free((char *)d);
send_failed(from, fromlen, name, sessionID, "out of memory", fd);
goto abort;
}
d->authorizations[0] = pdpy->fileAuthorization;
d->authNum = 1;
pdpy->fileAuthorization = 0;
}
DisposeProtoDisplay(pdpy);
Debug("starting display %s,%s\n", d->name, d->class2);
if(LoadDisplayResources(d) < 0)
{
LogError(
"Unable to read configuration for display %s; "
"stopping it.\n",
d->name);
StopDisplay(d);
}
else
StartDisplay(d);
CloseGetter();
}
}
abort:
XdmcpDisposeARRAY8(&displayClass);
if(name)
free((char *)name);
if(class2)
free((char *)class2);
}
static void
send_request_msg(void)
{
XdmcpHeader header;
int length;
int i;
CARD16 XdmcpConnectionType;
ARRAY8 authenticationData;
int socketfd = xdmcpSocket;
switch (SOCKADDR_FAMILY(ManagerAddress)) {
case AF_INET:
XdmcpConnectionType = FamilyInternet;
break;
#if defined(IPv6) && defined(AF_INET6)
case AF_INET6:
XdmcpConnectionType = FamilyInternet6;
break;
#endif
default:
XdmcpConnectionType = 0xffff;
break;
}
header.version = XDM_PROTOCOL_VERSION;
header.opcode = (CARD16) REQUEST;
length = 2; /* display number */
length += 1 + 2 * ConnectionTypes.length; /* connection types */
length += 1; /* connection addresses */
for (i = 0; i < ConnectionAddresses.length; i++)
length += 2 + ConnectionAddresses.data[i].length;
authenticationData.length = 0;
authenticationData.data = 0;
if (AuthenticationFuncs) {
(*AuthenticationFuncs->Generator) (AuthenticationData,
&authenticationData, REQUEST);
}
length += 2 + AuthenticationName->length; /* authentication name */
length += 2 + authenticationData.length; /* authentication data */
length += 1; /* authorization names */
for (i = 0; i < AuthorizationNames.length; i++)
length += 2 + AuthorizationNames.data[i].length;
length += 2 + ManufacturerDisplayID.length; /* display ID */
header.length = length;
if (!XdmcpWriteHeader(&buffer, &header)) {
XdmcpDisposeARRAY8(&authenticationData);
return;
}
XdmcpWriteCARD16(&buffer, DisplayNumber);
XdmcpWriteCARD8(&buffer, ConnectionTypes.length);
/* The connection array is send reordered, so that connections of */
/* the same address type as the XDMCP manager connection are send */
/* first. This works around a bug in xdm. [email protected] */
for (i = 0; i < (int) ConnectionTypes.length; i++)
if (ConnectionTypes.data[i] == XdmcpConnectionType)
XdmcpWriteCARD16(&buffer, ConnectionTypes.data[i]);
for (i = 0; i < (int) ConnectionTypes.length; i++)
if (ConnectionTypes.data[i] != XdmcpConnectionType)
XdmcpWriteCARD16(&buffer, ConnectionTypes.data[i]);
XdmcpWriteCARD8(&buffer, ConnectionAddresses.length);
for (i = 0; i < (int) ConnectionAddresses.length; i++)
if ((i < ConnectionTypes.length) &&
(ConnectionTypes.data[i] == XdmcpConnectionType))
XdmcpWriteARRAY8(&buffer, &ConnectionAddresses.data[i]);
for (i = 0; i < (int) ConnectionAddresses.length; i++)
if ((i >= ConnectionTypes.length) ||
(ConnectionTypes.data[i] != XdmcpConnectionType))
XdmcpWriteARRAY8(&buffer, &ConnectionAddresses.data[i]);
XdmcpWriteARRAY8(&buffer, AuthenticationName);
XdmcpWriteARRAY8(&buffer, &authenticationData);
XdmcpDisposeARRAY8(&authenticationData);
XdmcpWriteARRAYofARRAY8(&buffer, &AuthorizationNames);
XdmcpWriteARRAY8(&buffer, &ManufacturerDisplayID);
#if defined(IPv6) && defined(AF_INET6)
if (SOCKADDR_FAMILY(req_sockaddr) == AF_INET6)
socketfd = xdmcpSocket6;
#endif
if (XdmcpFlush(socketfd, &buffer,
(XdmcpNetaddr) &req_sockaddr, req_socklen))
state = XDM_AWAIT_REQUEST_RESPONSE;
}
static void
processDPipe(struct display *d)
{
char *user, *pass, *args;
int cmd;
GTalk dpytalk;
#ifdef XDMCP
int ct, len;
ARRAY8 ca, cp, ha;
#endif
dpytalk.pipe = &d->pipe;
if (Setjmp(dpytalk.errjmp)) {
stopDisplay(d);
return;
}
gSet(&dpytalk);
if (!gRecvCmd(&cmd)) {
/* process already exited */
unregisterInput(d->pipe.fd.r);
return;
}
switch (cmd) {
case D_User:
d->userSess = gRecvInt();
d->userName = gRecvStr();
d->sessName = gRecvStr();
break;
case D_UnUser:
sessionDone(d);
if (d->sdRec.how) {
if (d->sdRec.force == SHUT_ASK &&
(anyUserLogins(-1) || d->allowShutdown == SHUT_ROOT))
{
gSendInt(True);
} else {
if (!sdRec.how || sdRec.force != SHUT_FORCE ||
!((d->allowNuke == SHUT_NONE && sdRec.uid != d->sdRec.uid) ||
(d->allowNuke == SHUT_ROOT && d->sdRec.uid)))
{
free(sdRec.osname);
sdRec = d->sdRec;
} else {
free(d->sdRec.osname);
}
d->sdRec.how = 0;
d->sdRec.osname = 0;
gSendInt(False);
}
} else {
gSendInt(False);
}
break;
case D_ReLogin:
user = gRecvStr();
pass = gRecvStr();
args = gRecvStr();
setNLogin(d, user, pass, args, 1);
free(args);
free(pass);
free(user);
break;
#ifdef XDMCP
case D_ChooseHost:
ca.data = (unsigned char *)gRecvArr(&len);
ca.length = (CARD16)len;
cp.data = (unsigned char *)gRecvArr(&len);
cp.length = (CARD16)len;
ct = gRecvInt();
ha.data = (unsigned char *)gRecvArr(&len);
ha.length = (CARD16)len;
registerIndirectChoice(&ca, &cp, ct, &ha);
XdmcpDisposeARRAY8(&ha);
XdmcpDisposeARRAY8(&cp);
XdmcpDisposeARRAY8(&ca);
break;
case D_RemoteHost:
free(d->remoteHost);
d->remoteHost = gRecvStr();
break;
#endif
case D_XConnOk:
startingServer = 0;
break;
default:
logError("Internal error: unknown D_* command %d\n", cmd);
stopDisplay(d);
break;
}
}
