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/* Copyright (c) 2003 Juan Lang
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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 *
 * I am heavily indebted to Chris Hertel's excellent Implementing CIFS,
 * http://ubiqx.org/cifs/ , for whatever understanding I have of NBT.
 * I also stole from Mike McCormack's smb.c and netapi32.c, although little of
 * that code remains.
 * Lack of understanding and bugs are my fault.
 *
 * FIXME:
 * - Of the NetBIOS session functions, only client functions are supported, and
 *   it's likely they'll be the only functions supported.  NBT requires session
 *   servers to listen on TCP/139.  This requires root privilege, and Samba is
 *   likely to be listening here already.  This further restricts NetBIOS
 *   applications, both explicit users and implicit ones:  CreateNamedPipe
 *   won't actually create a listening pipe, for example, so applications can't
 *   act as RPC servers using a named pipe protocol binding, DCOM won't be able
 *   to support callbacks or servers over the named pipe protocol, etc.
 *
 * - Datagram support is omitted for the same reason.  To send a NetBIOS
 *   datagram, you must include the NetBIOS name by which your application is
 *   known.  This requires you to have registered the name previously, and be
 *   able to act as a NetBIOS datagram server (listening on UDP/138).
 *
 * - Name registration functions are omitted for the same reason--registering a
 *   name requires you to be able to defend it, and this means listening on
 *   UDP/137.
 *   Win98 requires you either use your computer's NetBIOS name (with the NULL
 *   suffix byte) as the calling name when creating a session, or to register
 *   a new name before creating one:  it disallows '*' as the calling name.
 *   Win2K initially starts with an empty name table, and doesn't allow you to
 *   use the machine's NetBIOS name (with the NULL suffix byte) as the calling
 *   name.  Although it allows sessions to be created with '*' as the calling
 *   name, doing so results in timeouts for all receives, because the
 *   application never gets them.
 *   So, a well-behaved Netbios application will typically want to register a
 *   name.  I should probably support a do-nothing name list that allows
 *   NCBADDNAME to add to it, but doesn't actually register the name, or does
 *   attempt to register it without being able to defend it.
 *
 * - Name lookups may not behave quite as you'd expect/like if you have
 *   multiple LANAs.  If a name is resolvable through DNS, or if you're using
 *   WINS, it'll resolve on _any_ LANA.  So, a Call will succeed on any LANA as
 *   well.
 *   I'm not sure how Windows behaves in this case.  I could try to force
 *   lookups to the correct adapter by using one of the GetPreferred*
 *   functions, but with the possibility of multiple adapters in the same
 *   same subnet, there's no guarantee that what IpHlpApi thinks is the
 *   preferred adapter will actually be a LANA.  (It's highly probable because
 *   this is an unusual configuration, but not guaranteed.)
 *
 * See also other FIXMEs in the code.
 */

#include "config.h"
#include <stdarg.h>
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#include "winsock2.h"
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#include "windef.h"
#include "winbase.h"
#include "wine/debug.h"
#include "winreg.h"
#include "iphlpapi.h"
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#include "netbios.h"
#include "nbnamecache.h"

WINE_DEFAULT_DEBUG_CHANNEL(netbios);

#define PORT_NBNS 137
#define PORT_NBDG 138
#define PORT_NBSS 139

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#ifndef INADDR_NONE
#define INADDR_NONE ~0UL
#endif

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#define NBR_ADDWORD(p,word) (*(WORD *)(p)) = htons(word)
#define NBR_GETWORD(p) ntohs(*(WORD *)(p))

#define MIN_QUERIES         1
#define MAX_QUERIES         0xffff
#define MIN_QUERY_TIMEOUT   100
#define MAX_QUERY_TIMEOUT   0xffffffff
#define BCAST_QUERIES       3
#define BCAST_QUERY_TIMEOUT 750
#define WINS_QUERIES        3
#define WINS_QUERY_TIMEOUT  750
#define MAX_WINS_SERVERS    2
#define MIN_CACHE_TIMEOUT   60000
#define CACHE_TIMEOUT       360000

#define MAX_NBT_NAME_SZ (NCBNAMSZ * 2 + MAX_DOMAIN_NAME_LEN + 2)
#define SIMPLE_NAME_QUERY_PKT_SIZE 26 + MAX_NBT_NAME_SZ

#define DEFAULT_NBT_SESSIONS 16

#define NBNS_TYPE_NB             0x0020
#define NBNS_TYPE_NBSTAT         0x0021
#define NBNS_CLASS_INTERNET      0x00001
#define NBNS_HEADER_SIZE         (sizeof(WORD) * 6)
#define NBNS_RESPONSE_AND_OPCODE 0xf800
#define NBNS_RESPONSE_AND_QUERY  0x8000
#define NBNS_REPLYCODE           0x0f

#define NBSS_HDRSIZE 4

#define NBSS_MSG       0x00
#define NBSS_REQ       0x81
#define NBSS_ACK       0x82
#define NBSS_NACK      0x83
#define NBSS_RETARGET  0x84
#define NBSS_KEEPALIVE 0x85

#define NBSS_ERR_NOT_LISTENING_ON_NAME    0x80
#define NBSS_ERR_NOT_LISTENING_FOR_CALLER 0x81
#define NBSS_ERR_BAD_NAME                 0x82
#define NBSS_ERR_INSUFFICIENT_RESOURCES   0x83

#define NBSS_EXTENSION 0x01

typedef struct _NetBTSession
{
    CRITICAL_SECTION cs;
    SOCKET           fd;
    DWORD            bytesPending;
} NetBTSession;

typedef struct _NetBTAdapter
{
    MIB_IPADDRROW       ipr;
    WORD                nameQueryXID;
    struct NBNameCache *nameCache;
    DWORD               xmit_success;
    DWORD               recv_success;
} NetBTAdapter;

static ULONG gTransportID;
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static BOOL  gEnableDNS;
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static DWORD gBCastQueries;
static DWORD gBCastQueryTimeout;
static DWORD gWINSQueries;
static DWORD gWINSQueryTimeout;
static DWORD gWINSServers[MAX_WINS_SERVERS];
static int   gNumWINSServers;
static char  gScopeID[MAX_DOMAIN_NAME_LEN];
static DWORD gCacheTimeout;
static struct NBNameCache *gNameCache;

/* Converts from a NetBIOS name into a Second Level Encoding-formatted name.
 * Assumes p is not NULL and is either NULL terminated or has at most NCBNAMSZ
 * bytes, and buffer has at least MAX_NBT_NAME_SZ bytes.  Pads with space bytes
 * if p is NULL-terminated.  Returns the number of bytes stored in buffer.
 */
static int NetBTNameEncode(const UCHAR *p, UCHAR *buffer)
{
    int i,len=0;

    if (!p) return 0;
    if (!buffer) return 0;

    buffer[len++] = NCBNAMSZ * 2;
    for (i = 0; p[i] && i < NCBNAMSZ; i++)
    {
        buffer[len++] = ((p[i] & 0xf0) >> 4) + 'A';
        buffer[len++] =  (p[i] & 0x0f) + 'A';
    }
    while (len < NCBNAMSZ * 2)
    {
        buffer[len++] = 'C';
        buffer[len++] = 'A';
    }
    if (*gScopeID)
    {
        int scopeIDLen = strlen(gScopeID);

        memcpy(buffer + len, gScopeID, scopeIDLen);
        len += scopeIDLen;
    }
    buffer[len++] = 0;     /* add second terminator */
    return len;
}

/* Creates a NBT name request packet for name in buffer.  If broadcast is true,
 * creates a broadcast request, otherwise creates a unicast request.
 * Returns the number of bytes stored in buffer.
 */
static DWORD NetBTNameReq(const UCHAR name[NCBNAMSZ], WORD xid, WORD qtype,
 BOOL broadcast, UCHAR *buffer, int len)
{
    int i = 0;

    if (len < SIMPLE_NAME_QUERY_PKT_SIZE) return 0;

    NBR_ADDWORD(&buffer[i],xid);    i+=2; /* transaction */
    if (broadcast)
    {
        NBR_ADDWORD(&buffer[i],0x0110); /* flags: r=req,op=query,rd=1,b=1 */
        i+=2;
    }
    else
    {
        NBR_ADDWORD(&buffer[i],0x0100); /* flags: r=req,op=query,rd=1,b=0 */
        i+=2;
    }
    NBR_ADDWORD(&buffer[i],0x0001); i+=2; /* one name query */
    NBR_ADDWORD(&buffer[i],0x0000); i+=2; /* zero answers */
    NBR_ADDWORD(&buffer[i],0x0000); i+=2; /* zero authorities */
    NBR_ADDWORD(&buffer[i],0x0000); i+=2; /* zero additional */

    i += NetBTNameEncode(name, &buffer[i]);

    NBR_ADDWORD(&buffer[i],qtype); i+=2;
    NBR_ADDWORD(&buffer[i],NBNS_CLASS_INTERNET); i+=2;

    return i;
}

/* Sends a name query request for name on fd to destAddr.  Sets SO_BROADCAST on
 * fd if broadcast is TRUE.  Assumes fd is not INVALID_SOCKET, and name is not
 * NULL.
 * Returns 0 on success, -1 on failure.
 */
static int NetBTSendNameQuery(SOCKET fd, const UCHAR name[NCBNAMSZ], WORD xid,
 WORD qtype, DWORD destAddr, BOOL broadcast)
{
    int ret = 0, on = 1;
    struct in_addr addr;

    addr.s_addr = destAddr;
    TRACE("name %s, dest addr %s\n", name, inet_ntoa(addr));

    if (broadcast)
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        ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (const char*)&on, sizeof(on));
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    if(ret == 0)
    {
        WSABUF wsaBuf;
        UCHAR buf[SIMPLE_NAME_QUERY_PKT_SIZE];
        struct sockaddr_in sin;

        memset(&sin, 0, sizeof(sin));
        sin.sin_addr.s_addr = destAddr;
        sin.sin_family      = AF_INET;
        sin.sin_port        = htons(PORT_NBNS);

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        wsaBuf.buf = (CHAR*)buf;
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        wsaBuf.len = NetBTNameReq(name, xid, qtype, broadcast, buf,
         sizeof(buf));
        if (wsaBuf.len > 0)
        {
            DWORD bytesSent;

            ret = WSASendTo(fd, &wsaBuf, 1, &bytesSent, 0,
             (struct sockaddr*)&sin, sizeof(sin), NULL, NULL);
            if (ret < 0 || bytesSent < wsaBuf.len)
                ret = -1;
            else
                ret = 0;
        }
        else
            ret = -1;
    }
    return ret;
}

typedef BOOL (*NetBTAnswerCallback)(void *data, WORD answerCount,
 WORD answerIndex, PUCHAR rData, WORD rdLength);

/* Waits on fd until GetTickCount() returns a value greater than or equal to
 * waitUntil for a name service response.  If a name response matching xid
 * is received, calls answerCallback once for each answer resource record in
 * the response.  (The callback's answerCount will be the total number of
 * answers to expect, and answerIndex will be the 0-based index that's being
 * sent this time.)  Quits parsing if answerCallback returns FALSE.
 * Returns NRC_GOODRET on timeout or a valid response received, something else
 * on error.
 */
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static UCHAR NetBTWaitForNameResponse(const NetBTAdapter *adapter, SOCKET fd,
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 DWORD waitUntil, NetBTAnswerCallback answerCallback, void *data)
{
    BOOL found = FALSE;
    DWORD now;
    UCHAR ret = NRC_GOODRET;

    if (!adapter) return NRC_BADDR;
    if (fd == INVALID_SOCKET) return NRC_BADDR;
    if (!answerCallback) return NRC_BADDR;

    while (!found && ret == NRC_GOODRET && (now = GetTickCount()) < waitUntil)
    {
        DWORD msToWait = waitUntil - now;
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        struct fd_set fds;
        struct timeval timeout = { msToWait / 1000, msToWait % 1000 };
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        int r;

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        FD_ZERO(&fds);
        FD_SET(fd, &fds);
        r = select(fd + 1, &fds, NULL, NULL, &timeout);
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        if (r < 0)
            ret = NRC_SYSTEM;
        else if (r == 1)
        {
            /* FIXME: magic #, is this always enough? */
            UCHAR buffer[256];
            int fromsize;
            struct sockaddr_in fromaddr;
            WORD respXID, flags, queryCount, answerCount;
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            WSABUF wsaBuf = { sizeof(buffer), (CHAR*)buffer };
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            DWORD bytesReceived, recvFlags = 0;

            fromsize = sizeof(fromaddr);
            r = WSARecvFrom(fd, &wsaBuf, 1, &bytesReceived, &recvFlags,
             (struct sockaddr*)&fromaddr, &fromsize, NULL, NULL);
            if(r < 0)
            {
                ret = NRC_SYSTEM;
                break;
            }

            if (bytesReceived < NBNS_HEADER_SIZE)
                continue;

            respXID = NBR_GETWORD(buffer);
            if (adapter->nameQueryXID != respXID)
                continue;

            flags = NBR_GETWORD(buffer + 2);
            queryCount = NBR_GETWORD(buffer + 4);
            answerCount = NBR_GETWORD(buffer + 6);

            /* a reply shouldn't contain a query, ignore bad packet */
            if (queryCount > 0)
                continue;

            if ((flags & NBNS_RESPONSE_AND_OPCODE) == NBNS_RESPONSE_AND_QUERY)
            {
                if ((flags & NBNS_REPLYCODE) != 0)
                    ret = NRC_NAMERR;
                else if ((flags & NBNS_REPLYCODE) == 0 && answerCount > 0)
                {
                    PUCHAR ptr = buffer + NBNS_HEADER_SIZE;
                    BOOL shouldContinue = TRUE;
                    WORD answerIndex = 0;

                    found = TRUE;
                    /* decode one answer at a time */
                    while (ret == NRC_GOODRET && answerIndex < answerCount &&
                     ptr - buffer < bytesReceived && shouldContinue)
                    {
                        WORD rLen;

                        /* scan past name */
                        for (; ptr[0] && ptr - buffer < bytesReceived; )
                            ptr += ptr[0] + 1;
                        ptr++;
                        ptr += 2; /* scan past type */
                        if (ptr - buffer < bytesReceived && ret == NRC_GOODRET
                         && NBR_GETWORD(ptr) == NBNS_CLASS_INTERNET)
                            ptr += sizeof(WORD);
                        else
                            ret = NRC_SYSTEM; /* parse error */
                        ptr += sizeof(DWORD); /* TTL */
                        rLen = NBR_GETWORD(ptr);
                        rLen = min(rLen, bytesReceived - (ptr - buffer));
                        ptr += sizeof(WORD);
                        shouldContinue = answerCallback(data, answerCount,
                         answerIndex, ptr, rLen);
                        ptr += rLen;
                        answerIndex++;
                    }
                }
            }
        }
    }
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

typedef struct _NetBTNameQueryData {
    NBNameCacheEntry *cacheEntry;
    UCHAR ret;
} NetBTNameQueryData;

/* Name query callback function for NetBTWaitForNameResponse, creates a cache
 * entry on the first answer, adds each address as it's called again (as long
 * as there's space).  If there's an error that should be propagated as the
 * NetBIOS error, modifies queryData's ret member to the proper return code.
 */
static BOOL NetBTFindNameAnswerCallback(void *pVoid, WORD answerCount,
 WORD answerIndex, PUCHAR rData, WORD rLen)
{
    NetBTNameQueryData *queryData = (NetBTNameQueryData *)pVoid;
    BOOL ret;

    if (queryData)
    {
        if (queryData->cacheEntry == NULL)
        {
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            queryData->cacheEntry = HeapAlloc(
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             GetProcessHeap(), 0, sizeof(NBNameCacheEntry) +
             (answerCount - 1) * sizeof(DWORD));
            if (queryData->cacheEntry)
                queryData->cacheEntry->numAddresses = 0;
            else
            {
                ret = FALSE;
                queryData->ret = NRC_OSRESNOTAV;
            }
        }
        if (rLen == 6 && queryData->cacheEntry &&
         queryData->cacheEntry->numAddresses < answerCount)
        {
            queryData->cacheEntry->addresses[queryData->cacheEntry->
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             numAddresses++] = *(const DWORD *)(rData + 2);
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            ret = queryData->cacheEntry->numAddresses < answerCount;
        }
        else
            ret = FALSE;
    }
    else
        ret = FALSE;
    return ret;
}

/* Workhorse NetBT name lookup function.  Sends a name lookup query for
 * ncb->ncb_callname to sendTo, as a broadcast if broadcast is TRUE, using
 * adapter->nameQueryXID as the transaction ID.  Waits up to timeout
 * milliseconds, and retries up to maxQueries times, waiting for a reply.
 * If a valid response is received, stores the looked up addresses as a
 * NBNameCacheEntry in *cacheEntry.
 * Returns NRC_GOODRET on success, though this may not mean the name was
 * resolved--check whether *cacheEntry is NULL.
 */
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static UCHAR NetBTNameWaitLoop(const NetBTAdapter *adapter, SOCKET fd, const NCB *ncb,
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 DWORD sendTo, BOOL broadcast, DWORD timeout, DWORD maxQueries,
 NBNameCacheEntry **cacheEntry)
{
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    unsigned int queries;
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    NetBTNameQueryData queryData;

    if (!adapter) return NRC_BADDR;
    if (fd == INVALID_SOCKET) return NRC_BADDR;
    if (!ncb) return NRC_BADDR;
    if (!cacheEntry) return NRC_BADDR;

    queryData.cacheEntry = NULL;
    queryData.ret = NRC_GOODRET;
    for (queries = 0; queryData.cacheEntry == NULL && queries < maxQueries;
     queries++)
    {
        if (!NCB_CANCELLED(ncb))
        {
            int r = NetBTSendNameQuery(fd, ncb->ncb_callname,
             adapter->nameQueryXID, NBNS_TYPE_NB, sendTo, broadcast);

            if (r == 0)
                queryData.ret = NetBTWaitForNameResponse(adapter, fd,
                 GetTickCount() + timeout, NetBTFindNameAnswerCallback,
                 &queryData);
            else
                queryData.ret = NRC_SYSTEM;
        }
        else
            queryData.ret = NRC_CMDCAN;
    }
    if (queryData.cacheEntry)
    {
        memcpy(queryData.cacheEntry->name, ncb->ncb_callname, NCBNAMSZ);
        memcpy(queryData.cacheEntry->nbname, ncb->ncb_callname, NCBNAMSZ);
    }
    *cacheEntry = queryData.cacheEntry;
    return queryData.ret;
}

/* Attempts to add cacheEntry to the name cache in *nameCache; if *nameCache
 * has not yet been created, creates it, using gCacheTimeout as the cache
 * entry timeout.  If memory allocation fails, or if NBNameCacheAddEntry fails,
 * frees cacheEntry.
 * Returns NRC_GOODRET on success, and something else on failure.
 */
static UCHAR NetBTStoreCacheEntry(struct NBNameCache **nameCache,
 NBNameCacheEntry *cacheEntry)
{
    UCHAR ret;

    if (!nameCache) return NRC_BADDR;
    if (!cacheEntry) return NRC_BADDR;

    if (!*nameCache)
        *nameCache = NBNameCacheCreate(GetProcessHeap(), gCacheTimeout);
    if (*nameCache)
        ret = NBNameCacheAddEntry(*nameCache, cacheEntry)
         ?  NRC_GOODRET : NRC_OSRESNOTAV;
    else
    {
        HeapFree(GetProcessHeap(), 0, cacheEntry);
        ret = NRC_OSRESNOTAV;
    }
    return ret;
}

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/* Attempts to resolve name using inet_addr(), then gethostbyname() if
 * gEnableDNS is TRUE, if the suffix byte is either <00> or <20>.  If the name
 * can be looked up, returns 0 and stores the looked up addresses as a
 * NBNameCacheEntry in *cacheEntry.
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 * Returns NRC_GOODRET on success, though this may not mean the name was
 * resolved--check whether *cacheEntry is NULL.  Returns something else on
 * error.
 */
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static UCHAR NetBTinetResolve(const UCHAR name[NCBNAMSZ],
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 NBNameCacheEntry **cacheEntry)
{
    UCHAR ret = NRC_GOODRET;

    TRACE("name %s, cacheEntry %p\n", name, cacheEntry);

    if (!name) return NRC_BADDR;
    if (!cacheEntry) return NRC_BADDR;

    if (isalnum(name[0]) && (name[NCBNAMSZ - 1] == 0 ||
     name[NCBNAMSZ - 1] == 0x20))
    {
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        CHAR toLookup[NCBNAMSZ];
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        unsigned int i;
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        for (i = 0; i < NCBNAMSZ - 1 && name[i] && name[i] != ' '; i++)
            toLookup[i] = name[i];
        toLookup[i] = '\0';

        if (isdigit(toLookup[0]))
        {
            unsigned long addr = inet_addr(toLookup);

            if (addr != INADDR_NONE)
            {
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                *cacheEntry = HeapAlloc(GetProcessHeap(),
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                 0, sizeof(NBNameCacheEntry));
                if (*cacheEntry)
                {
                    memcpy((*cacheEntry)->name, name, NCBNAMSZ);
                    memset((*cacheEntry)->nbname, 0, NCBNAMSZ);
                    (*cacheEntry)->nbname[0] = '*';
                    (*cacheEntry)->numAddresses = 1;
                    (*cacheEntry)->addresses[0] = addr;
                }
                else
                    ret = NRC_OSRESNOTAV;
            }
        }
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        if (gEnableDNS && ret == NRC_GOODRET && !*cacheEntry)
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        {
            struct hostent *host;

            if ((host = gethostbyname(toLookup)) != NULL)
            {
                for (i = 0; ret == NRC_GOODRET && host->h_addr_list &&
                 host->h_addr_list[i]; i++)
                    ;
                if (host->h_addr_list && host->h_addr_list[0])
                {
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                    *cacheEntry = HeapAlloc(
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                     GetProcessHeap(), 0, sizeof(NBNameCacheEntry) +
                     (i - 1) * sizeof(DWORD));
                    if (*cacheEntry)
                    {
                        memcpy((*cacheEntry)->name, name, NCBNAMSZ);
                        memset((*cacheEntry)->nbname, 0, NCBNAMSZ);
                        (*cacheEntry)->nbname[0] = '*';
                        (*cacheEntry)->numAddresses = i;
                        for (i = 0; i < (*cacheEntry)->numAddresses; i++)
                            (*cacheEntry)->addresses[i] =
                             (DWORD)host->h_addr_list[i];
                    }
                    else
                        ret = NRC_OSRESNOTAV;
                }
            }
        }
    }

    TRACE("returning 0x%02x\n", ret);
    return ret;
}

/* Looks up the name in ncb->ncb_callname, first in the name caches (global
 * and this adapter's), then using gethostbyname(), next by WINS if configured,
 * and finally using broadcast NetBT name resolution.  In NBT parlance, this
 * makes this an "H-node".  Stores an entry in the appropriate name cache for a
 * found node, and returns it as *cacheEntry.
 * Assumes data, ncb, and cacheEntry are not NULL.
 * Returns NRC_GOODRET on success--which doesn't mean the name was resolved,
 * just that all name lookup operations completed successfully--and something
 * else on failure.  *cacheEntry will be NULL if the name was not found.
 */
static UCHAR NetBTInternalFindName(NetBTAdapter *adapter, PNCB ncb,
 const NBNameCacheEntry **cacheEntry)
{
    UCHAR ret = NRC_GOODRET;

    TRACE("adapter %p, ncb %p, cacheEntry %p\n", adapter, ncb, cacheEntry);

    if (!cacheEntry) return NRC_BADDR;
    *cacheEntry = NULL;

    if (!adapter) return NRC_BADDR;
    if (!ncb) return NRC_BADDR;

    if (ncb->ncb_callname[0] == '*')
        ret = NRC_NOWILD;
    else
    {
        *cacheEntry = NBNameCacheFindEntry(gNameCache, ncb->ncb_callname);
        if (!*cacheEntry)
            *cacheEntry = NBNameCacheFindEntry(adapter->nameCache,
             ncb->ncb_callname);
        if (!*cacheEntry)
        {
            NBNameCacheEntry *newEntry = NULL;

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            ret = NetBTinetResolve(ncb->ncb_callname, &newEntry);
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            if (ret == NRC_GOODRET && newEntry)
            {
                ret = NetBTStoreCacheEntry(&gNameCache, newEntry);
                if (ret != NRC_GOODRET)
                    newEntry = NULL;
            }
            else
            {
                SOCKET fd = WSASocketA(PF_INET, SOCK_DGRAM, IPPROTO_UDP, NULL,
                 0, WSA_FLAG_OVERLAPPED);

                if(fd == INVALID_SOCKET)
                    ret = NRC_OSRESNOTAV;
                else
                {
                    int winsNdx;

                    adapter->nameQueryXID++;
                    for (winsNdx = 0; ret == NRC_GOODRET && *cacheEntry == NULL
                     && winsNdx < gNumWINSServers; winsNdx++)
                        ret = NetBTNameWaitLoop(adapter, fd, ncb,
                         gWINSServers[winsNdx], FALSE, gWINSQueryTimeout,
                         gWINSQueries, &newEntry);
                    if (ret == NRC_GOODRET && newEntry)
                    {
                        ret = NetBTStoreCacheEntry(&gNameCache, newEntry);
                        if (ret != NRC_GOODRET)
                            newEntry = NULL;
                    }
                    if (ret == NRC_GOODRET && *cacheEntry == NULL)
                    {
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                        DWORD bcastAddr =
                         adapter->ipr.dwAddr & adapter->ipr.dwMask;

                        if (adapter->ipr.dwBCastAddr)
                            bcastAddr |= ~adapter->ipr.dwMask;
                        ret = NetBTNameWaitLoop(adapter, fd, ncb, bcastAddr,
                         TRUE, gBCastQueryTimeout, gBCastQueries, &newEntry);
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                        if (ret == NRC_GOODRET && newEntry)
                        {
                            ret = NetBTStoreCacheEntry(&adapter->nameCache,
                             newEntry);
                            if (ret != NRC_GOODRET)
                                newEntry = NULL;
                        }
                    }
                    closesocket(fd);
                }
            }
            *cacheEntry = newEntry;
        }
    }
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

typedef struct _NetBTNodeQueryData
{
    BOOL gotResponse;
    PADAPTER_STATUS astat;
    WORD astatLen;
} NetBTNodeQueryData;

/* Callback function for NetBTAstatRemote, parses the rData for the node
 * status and name list of the remote node.  Always returns FALSE, since
 * there's never more than one answer we care about in a node status response.
 */
static BOOL NetBTNodeStatusAnswerCallback(void *pVoid, WORD answerCount,
 WORD answerIndex, PUCHAR rData, WORD rLen)
{
    NetBTNodeQueryData *data = (NetBTNodeQueryData *)pVoid;

    if (data && !data->gotResponse && rData && rLen >= 1)
    {
        /* num names is first byte; each name is NCBNAMSZ + 2 bytes */
        if (rLen >= rData[0] * (NCBNAMSZ + 2))
        {
            WORD i;
            PUCHAR src;
            PNAME_BUFFER dst;

            data->gotResponse = TRUE;
            data->astat->name_count = rData[0];
            for (i = 0, src = rData + 1,
             dst = (PNAME_BUFFER)((PUCHAR)data->astat +
              sizeof(ADAPTER_STATUS));
             i < data->astat->name_count && src - rData < rLen &&
             (PUCHAR)dst - (PUCHAR)data->astat < data->astatLen;
             i++, dst++, src += NCBNAMSZ + 2)
            {
                UCHAR flags = *(src + NCBNAMSZ);

                memcpy(dst->name, src, NCBNAMSZ);
                /* we won't actually see a registering name in the returned
                 * response.  It's useful to see if no other flags are set; if
                 * none are, then the name is registered. */
                dst->name_flags = REGISTERING;
                if (flags & 0x80)
                    dst->name_flags |= GROUP_NAME;
                if (flags & 0x10)
                    dst->name_flags |= DEREGISTERED;
                if (flags & 0x08)
                    dst->name_flags |= DUPLICATE;
                if (dst->name_flags == REGISTERING)
                    dst->name_flags = REGISTERED;
            }
            /* arbitrarily set HW type to Ethernet */
            data->astat->adapter_type = 0xfe;
            if (src - rData < rLen)
                memcpy(data->astat->adapter_address, src,
                 min(rLen - (src - rData), 6));
        }
    }
    return FALSE;
}

/* This uses the WINS timeout and query values, as they're the
 * UCAST_REQ_RETRY_TIMEOUT and UCAST_REQ_RETRY_COUNT according to the RFCs.
 */
static UCHAR NetBTAstatRemote(NetBTAdapter *adapter, PNCB ncb)
{
    UCHAR ret = NRC_GOODRET;
    const NBNameCacheEntry *cacheEntry = NULL;

    TRACE("adapter %p, NCB %p\n", adapter, ncb);

    if (!adapter) return NRC_BADDR;
    if (!ncb) return NRC_INVADDRESS;

    ret = NetBTInternalFindName(adapter, ncb, &cacheEntry);
    if (ret == NRC_GOODRET && cacheEntry)
    {
        if (cacheEntry->numAddresses > 0)
        {
            SOCKET fd = WSASocketA(PF_INET, SOCK_DGRAM, IPPROTO_UDP, NULL, 0,
             WSA_FLAG_OVERLAPPED);

            if(fd == INVALID_SOCKET)
                ret = NRC_OSRESNOTAV;
            else
            {
                NetBTNodeQueryData queryData;
                DWORD queries;
                PADAPTER_STATUS astat = (PADAPTER_STATUS)ncb->ncb_buffer;

                adapter->nameQueryXID++;
                astat->name_count = 0;
                queryData.gotResponse = FALSE;
                queryData.astat = astat;
                queryData.astatLen = ncb->ncb_length;
                for (queries = 0; !queryData.gotResponse &&
                 queries < gWINSQueries; queries++)
                {
                    if (!NCB_CANCELLED(ncb))
                    {
                        int r = NetBTSendNameQuery(fd, ncb->ncb_callname,
                         adapter->nameQueryXID, NBNS_TYPE_NBSTAT,
                         cacheEntry->addresses[0], FALSE);

                        if (r == 0)
                            ret = NetBTWaitForNameResponse(adapter, fd,
                             GetTickCount() + gWINSQueryTimeout,
                             NetBTNodeStatusAnswerCallback, &queryData);
                        else
                            ret = NRC_SYSTEM;
                    }
                    else
                        ret = NRC_CMDCAN;
                }
                closesocket(fd);
            }
        }
        else
            ret = NRC_CMDTMO;
    }
    else if (ret == NRC_CMDCAN)
        ; /* do nothing, we were cancelled */
    else
        ret = NRC_CMDTMO;
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

static UCHAR NetBTAstat(void *adapt, PNCB ncb)
{
    NetBTAdapter *adapter = (NetBTAdapter *)adapt;
    UCHAR ret;

    TRACE("adapt %p, NCB %p\n", adapt, ncb);

    if (!adapter) return NRC_ENVNOTDEF;
    if (!ncb) return NRC_INVADDRESS;
    if (!ncb->ncb_buffer) return NRC_BADDR;
    if (ncb->ncb_length < sizeof(ADAPTER_STATUS)) return NRC_BUFLEN;

    if (ncb->ncb_callname[0] == '*')
    {
        DWORD physAddrLen;
        MIB_IFROW ifRow;
        PADAPTER_STATUS astat = (PADAPTER_STATUS)ncb->ncb_buffer;
  
        memset(astat, 0, sizeof(ADAPTER_STATUS));
        astat->rev_major = 3;
        ifRow.dwIndex = adapter->ipr.dwIndex;
        if (GetIfEntry(&ifRow) != NO_ERROR)
            ret = NRC_BRIDGE;
        else
        {
            physAddrLen = min(ifRow.dwPhysAddrLen, 6);
            if (physAddrLen > 0)
                memcpy(astat->adapter_address, ifRow.bPhysAddr, physAddrLen);
            /* doubt anyone cares, but why not.. */
            if (ifRow.dwType == MIB_IF_TYPE_TOKENRING)
                astat->adapter_type = 0xff;
            else
                astat->adapter_type = 0xfe; /* for Ethernet */
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            astat->max_sess_pkt_size = 0xffff;
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            astat->xmit_success = adapter->xmit_success;
            astat->recv_success = adapter->recv_success;
        }
        ret = NRC_GOODRET;
    }
    else
        ret = NetBTAstatRemote(adapter, ncb);
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

static UCHAR NetBTFindName(void *adapt, PNCB ncb)
{
    NetBTAdapter *adapter = (NetBTAdapter *)adapt;
    UCHAR ret;
    const NBNameCacheEntry *cacheEntry = NULL;
    PFIND_NAME_HEADER foundName;

    TRACE("adapt %p, NCB %p\n", adapt, ncb);

    if (!adapter) return NRC_ENVNOTDEF;
    if (!ncb) return NRC_INVADDRESS;
    if (!ncb->ncb_buffer) return NRC_BADDR;
    if (ncb->ncb_length < sizeof(FIND_NAME_HEADER)) return NRC_BUFLEN;

    foundName = (PFIND_NAME_HEADER)ncb->ncb_buffer;
    memset(foundName, 0, sizeof(FIND_NAME_HEADER));

    ret = NetBTInternalFindName(adapter, ncb, &cacheEntry);
    if (ret == NRC_GOODRET)
    {
        if (cacheEntry)
        {
            DWORD spaceFor = min((ncb->ncb_length - sizeof(FIND_NAME_HEADER)) /
             sizeof(FIND_NAME_BUFFER), cacheEntry->numAddresses);
            DWORD ndx;

            for (ndx = 0; ndx < spaceFor; ndx++)
            {
                PFIND_NAME_BUFFER findNameBuffer;

                findNameBuffer =
                 (PFIND_NAME_BUFFER)((PUCHAR)foundName +
                 sizeof(FIND_NAME_HEADER) + foundName->node_count *
                 sizeof(FIND_NAME_BUFFER));
                memset(findNameBuffer->destination_addr, 0, 2);
                memcpy(findNameBuffer->destination_addr + 2,
                 &adapter->ipr.dwAddr, sizeof(DWORD));
                memset(findNameBuffer->source_addr, 0, 2);
                memcpy(findNameBuffer->source_addr + 2,
                 &cacheEntry->addresses[ndx], sizeof(DWORD));
                foundName->node_count++;
            }
            if (spaceFor < cacheEntry->numAddresses)
                ret = NRC_BUFLEN;
        }
        else
            ret = NRC_CMDTMO;
    }
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

static UCHAR NetBTSessionReq(SOCKET fd, const UCHAR *calledName,
 const UCHAR *callingName)
{
    UCHAR buffer[NBSS_HDRSIZE + MAX_DOMAIN_NAME_LEN * 2], ret;
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    int r;
    unsigned int len = 0;
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    DWORD bytesSent, bytesReceived, recvFlags = 0;
    WSABUF wsaBuf;

    buffer[0] = NBSS_REQ;
    buffer[1] = 0;

    len += NetBTNameEncode(calledName, &buffer[NBSS_HDRSIZE]);
    len += NetBTNameEncode(callingName, &buffer[NBSS_HDRSIZE + len]);

    NBR_ADDWORD(&buffer[2], len);

    wsaBuf.len = len + NBSS_HDRSIZE;
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    wsaBuf.buf = (char*)buffer;
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    r = WSASend(fd, &wsaBuf, 1, &bytesSent, 0, NULL, NULL);
    if(r < 0 || bytesSent < len + NBSS_HDRSIZE)
    {
        ERR("send failed\n");
        return NRC_SABORT;
    }

    /* I've already set the recv timeout on this socket (if it supports it), so
     * just block.  Hopefully we'll always receive the session acknowledgement
     * within one timeout.
     */
    wsaBuf.len = NBSS_HDRSIZE + 1;
    r = WSARecv(fd, &wsaBuf, 1, &bytesReceived, &recvFlags, NULL, NULL);
    if (r < 0 || bytesReceived < NBSS_HDRSIZE)
        ret = NRC_SABORT;
    else if (buffer[0] == NBSS_NACK)
    {
        if (r == NBSS_HDRSIZE + 1)
        {
            switch (buffer[NBSS_HDRSIZE])
            {
                case NBSS_ERR_INSUFFICIENT_RESOURCES:
                    ret = NRC_REMTFUL;
                    break;
                default:
                    ret = NRC_NOCALL;
            }
        }
        else
            ret = NRC_NOCALL;
    }
    else if (buffer[0] == NBSS_RETARGET)
    {
        FIXME("Got a session retarget, can't deal\n");
        ret = NRC_NOCALL;
    }
    else if (buffer[0] == NBSS_ACK)
        ret = NRC_GOODRET;
    else
        ret = NRC_SYSTEM;

    TRACE("returning 0x%02x\n", ret);
    return ret;
}

static UCHAR NetBTCall(void *adapt, PNCB ncb, void **sess)
{
    NetBTAdapter *adapter = (NetBTAdapter *)adapt;
    UCHAR ret;
    const NBNameCacheEntry *cacheEntry = NULL;

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    TRACE("adapt %p, ncb %p\n", adapt, ncb);
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    if (!adapter) return NRC_ENVNOTDEF;
    if (!ncb) return NRC_INVADDRESS;
    if (!sess) return NRC_BADDR;

    ret = NetBTInternalFindName(adapter, ncb, &cacheEntry);
    if (ret == NRC_GOODRET)
    {
        if (cacheEntry && cacheEntry->numAddresses > 0)
        {
            SOCKET fd;

            fd = WSASocketA(PF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0,
             WSA_FLAG_OVERLAPPED);
            if (fd != INVALID_SOCKET)
            {
                DWORD timeout;
                struct sockaddr_in sin;

                if (ncb->ncb_rto > 0)
                {
                    timeout = ncb->ncb_rto * 500;
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                    setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (char*)&timeout,
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                     sizeof(timeout));
                }
                if (ncb->ncb_rto > 0)
                {
                    timeout = ncb->ncb_sto * 500;
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                    setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, (char*)&timeout,
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                     sizeof(timeout));
                }

                memset(&sin, 0, sizeof(sin));
                memcpy(&sin.sin_addr, &cacheEntry->addresses[0],
                 sizeof(sin.sin_addr));
                sin.sin_family = AF_INET;
                sin.sin_port   = htons(PORT_NBSS);
                /* FIXME: use nonblocking mode for the socket, check the
                 * cancel flag periodically
                 */
                if (connect(fd, (struct sockaddr *)&sin, sizeof(sin))
                 == SOCKET_ERROR)
                    ret = NRC_CMDTMO;
                else
                {
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                    static const UCHAR fakedCalledName[] = "*SMBSERVER";
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                    const UCHAR *calledParty = cacheEntry->nbname[0] == '*'
                     ? fakedCalledName : cacheEntry->nbname;

                    ret = NetBTSessionReq(fd, calledParty, ncb->ncb_name);
                    if (ret != NRC_GOODRET && calledParty[0] == '*')
                    {
                        FIXME("NBT session to \"*SMBSERVER\" refused,\n");
                        FIXME("should try finding name using ASTAT\n");
                    }
                }
                if (ret != NRC_GOODRET)
                    closesocket(fd);
                else
                {
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                    NetBTSession *session = HeapAlloc(
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                     GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(NetBTSession));

                    if (session)
                    {
                        session->fd = fd;
                        InitializeCriticalSection(&session->cs);
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                        session->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": NetBTSession.cs");
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                        *sess = session;
                    }
                    else
                    {
                        ret = NRC_OSRESNOTAV;
                        closesocket(fd);
                    }
                }
            }
            else
                ret = NRC_OSRESNOTAV;
        }
        else
            ret = NRC_NAMERR;
    }
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

/* Notice that I don't protect against multiple thread access to NetBTSend.
 * This is because I don't update any data in the adapter, and I only make a
 * single call to WSASend, which I assume to act atomically (not interleaving
 * data from other threads).
 * I don't lock, because I only depend on the fd being valid, and this won't be
 * true until a session setup is completed.
 */
static UCHAR NetBTSend(void *adapt, void *sess, PNCB ncb)
{
    NetBTAdapter *adapter = (NetBTAdapter *)adapt;
    NetBTSession *session = (NetBTSession *)sess;
    UCHAR buffer[NBSS_HDRSIZE], ret;
    int r;
    WSABUF wsaBufs[2];
    DWORD bytesSent;

    TRACE("adapt %p, session %p, NCB %p\n", adapt, session, ncb);

    if (!adapter) return NRC_ENVNOTDEF;
    if (!ncb) return NRC_INVADDRESS;
    if (!ncb->ncb_buffer) return NRC_BADDR;
    if (!session) return NRC_SNUMOUT;
    if (session->fd == INVALID_SOCKET) return NRC_SNUMOUT;

    buffer[0] = NBSS_MSG;
    buffer[1] = 0;
    NBR_ADDWORD(&buffer[2], ncb->ncb_length);

    wsaBufs[0].len = NBSS_HDRSIZE;
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    wsaBufs[0].buf = (char*)buffer;
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    wsaBufs[1].len = ncb->ncb_length;
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    wsaBufs[1].buf = (char*)ncb->ncb_buffer;
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    r = WSASend(session->fd, wsaBufs, sizeof(wsaBufs) / sizeof(wsaBufs[0]),
     &bytesSent, 0, NULL, NULL);
    if (r == SOCKET_ERROR)
    {
        NetBIOSHangupSession(ncb);
        ret = NRC_SABORT;
    }
    else if (bytesSent < NBSS_HDRSIZE + ncb->ncb_length)
    {
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        FIXME("Only sent %d bytes (of %d), hanging up session\n", bytesSent,
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         NBSS_HDRSIZE + ncb->ncb_length);
        NetBIOSHangupSession(ncb);
        ret = NRC_SABORT;
    }
    else
    {
        ret = NRC_GOODRET;
        adapter->xmit_success++;
    }
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

static UCHAR NetBTRecv(void *adapt, void *sess, PNCB ncb)
{
    NetBTAdapter *adapter = (NetBTAdapter *)adapt;
    NetBTSession *session = (NetBTSession *)sess;
    UCHAR buffer[NBSS_HDRSIZE], ret;
    int r;
    WSABUF wsaBufs[2];
    DWORD bufferCount, bytesReceived, flags;

    TRACE("adapt %p, session %p, NCB %p\n", adapt, session, ncb);

    if (!adapter) return NRC_ENVNOTDEF;
    if (!ncb) return NRC_BADDR;
    if (!ncb->ncb_buffer) return NRC_BADDR;
    if (!session) return NRC_SNUMOUT;
    if (session->fd == INVALID_SOCKET) return NRC_SNUMOUT;

    EnterCriticalSection(&session->cs);
    bufferCount = 0;
    if (session->bytesPending == 0)
    {
        bufferCount++;
        wsaBufs[0].len = NBSS_HDRSIZE;
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        wsaBufs[0].buf = (char*)buffer;
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    }
    wsaBufs[bufferCount].len = ncb->ncb_length;
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    wsaBufs[bufferCount].buf = (char*)ncb->ncb_buffer;
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    bufferCount++;

    flags = 0;
    /* FIXME: should poll a bit so I can check the cancel flag */
    r = WSARecv(session->fd, wsaBufs, bufferCount, &bytesReceived, &flags,
     NULL, NULL);
    if (r == SOCKET_ERROR && WSAGetLastError() != WSAEWOULDBLOCK)
    {
        LeaveCriticalSection(&session->cs);
        ERR("Receive error, WSAGetLastError() returns %d\n", WSAGetLastError());
        NetBIOSHangupSession(ncb);
        ret = NRC_SABORT;
    }
    else if (NCB_CANCELLED(ncb))
    {
        LeaveCriticalSection(&session->cs);
        ret = NRC_CMDCAN;
    }
    else
    {
        if (bufferCount == 2)
        {
            if (buffer[0] == NBSS_KEEPALIVE)
            {
                LeaveCriticalSection(&session->cs);
                FIXME("Oops, received a session keepalive and lost my place\n");
                /* need to read another session header until we get a session
                 * message header. */
                NetBIOSHangupSession(ncb);
                ret = NRC_SABORT;
            }
            else if (buffer[0] != NBSS_MSG)
            {
                LeaveCriticalSection(&session->cs);
                FIXME("Received unexpected session msg type %d\n", buffer[0]);
                NetBIOSHangupSession(ncb);
                ret = NRC_SABORT;
            }
            else
            {
                if (buffer[1] & NBSS_EXTENSION)
                {
                    LeaveCriticalSection(&session->cs);
                    FIXME("Received a message that's too long for my taste\n");
                    NetBIOSHangupSession(ncb);
                    ret = NRC_SABORT;
                }
                else
                {
                    session->bytesPending = NBSS_HDRSIZE
                     + NBR_GETWORD(&buffer[2]) - bytesReceived;
                    ncb->ncb_length = bytesReceived - NBSS_HDRSIZE;
                    LeaveCriticalSection(&session->cs);
                }
            }
        }
        else
        {
            if (bytesReceived < session->bytesPending)
                session->bytesPending -= bytesReceived;
            else
                session->bytesPending = 0;
            LeaveCriticalSection(&session->cs);
            ncb->ncb_length = bytesReceived;
        }
        if (session->bytesPending > 0)
            ret = NRC_INCOMP;
        else
        {
            ret = NRC_GOODRET;
            adapter->recv_success++;
        }
    }
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

static UCHAR NetBTHangup(void *adapt, void *sess)
{
    NetBTSession *session = (NetBTSession *)sess;

    TRACE("adapt %p, session %p\n", adapt, session);

    if (!session) return NRC_SNUMOUT;

    /* I don't lock the session, because NetBTRecv knows not to decrement
     * past 0, so if a receive completes after this it should still deal.
     */
    closesocket(session->fd);
    session->fd = INVALID_SOCKET;
    session->bytesPending = 0;
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    session->cs.DebugInfo->Spare[0] = 0;
1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276
    DeleteCriticalSection(&session->cs);
    HeapFree(GetProcessHeap(), 0, session);

    return NRC_GOODRET;
}

static void NetBTCleanupAdapter(void *adapt)
{
    TRACE("adapt %p\n", adapt);
    if (adapt)
    {
        NetBTAdapter *adapter = (NetBTAdapter *)adapt;

        if (adapter->nameCache)
            NBNameCacheDestroy(adapter->nameCache);
        HeapFree(GetProcessHeap(), 0, adapt);
    }
}

static void NetBTCleanup(void)
{
    TRACE("\n");
    if (gNameCache)
    {
        NBNameCacheDestroy(gNameCache);
        gNameCache = NULL;
    }
}

1277
static UCHAR NetBTRegisterAdapter(const MIB_IPADDRROW *ipRow)
1278 1279 1280
{
    UCHAR ret;
    NetBTAdapter *adapter;
1281

1282 1283
    if (!ipRow) return NRC_BADDR;

1284
    adapter = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(NetBTAdapter));
1285 1286
    if (adapter)
    {
1287
        adapter->ipr = *ipRow;
1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360
        if (!NetBIOSRegisterAdapter(gTransportID, ipRow->dwIndex, adapter))
        {
            NetBTCleanupAdapter(adapter);
            ret = NRC_SYSTEM;
        }
        else
            ret = NRC_GOODRET;
    }
    else
        ret = NRC_OSRESNOTAV;
    return ret;
}

/* Callback for NetBIOS adapter enumeration.  Assumes closure is a pointer to
 * a MIB_IPADDRTABLE containing all the IP adapters needed to be added to the
 * NetBIOS adapter table.  For each callback, checks if the passed-in adapt
 * has an entry in the table; if so, this adapter was enumerated previously,
 * and it's enabled.  As a flag, the table's dwAddr entry is changed to
 * INADDR_LOOPBACK, since this is an invalid address for a NetBT adapter.
 * The NetBTEnum function will add any remaining adapters from the
 * MIB_IPADDRTABLE to the NetBIOS adapter table.
 */
static BOOL NetBTEnumCallback(UCHAR totalLANAs, UCHAR lanaIndex,
 ULONG transport, const NetBIOSAdapterImpl *data, void *closure)
{
    BOOL ret;
    PMIB_IPADDRTABLE table = (PMIB_IPADDRTABLE)closure;

    if (table && data)
    {
        DWORD ndx;

        ret = FALSE;
        for (ndx = 0; !ret && ndx < table->dwNumEntries; ndx++)
        {
            const NetBTAdapter *adapter = (const NetBTAdapter *)data->data;

            if (table->table[ndx].dwIndex == adapter->ipr.dwIndex)
            {
                NetBIOSEnableAdapter(data->lana);
                table->table[ndx].dwAddr = INADDR_LOOPBACK;
                ret = TRUE;
            }
        }
    }
    else
        ret = FALSE;
    return ret;
}

/* Enumerates adapters by:
 * - retrieving the IP address table for the local machine
 * - eliminating loopback addresses from the table
 * - eliminating redundant addresses, that is, multiple addresses on the same
 *   subnet
 * Calls NetBIOSEnumAdapters, passing the resulting table as the callback
 * data.  The callback reenables each adapter that's already in the NetBIOS
 * table.  After NetBIOSEnumAdapters returns, this function adds any remaining
 * adapters to the NetBIOS table.
 */
static UCHAR NetBTEnum(void)
{
    UCHAR ret;
    DWORD size = 0;

    TRACE("\n");

    if (GetIpAddrTable(NULL, &size, FALSE) == ERROR_INSUFFICIENT_BUFFER)
    {
        PMIB_IPADDRTABLE ipAddrs, coalesceTable = NULL;
        DWORD numIPAddrs = (size - sizeof(MIB_IPADDRTABLE)) /
         sizeof(MIB_IPADDRROW) + 1;

1361
        ipAddrs = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
1362
        if (ipAddrs)
1363
            coalesceTable = HeapAlloc(GetProcessHeap(),
1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419
             HEAP_ZERO_MEMORY, sizeof(MIB_IPADDRTABLE) +
             (min(numIPAddrs, MAX_LANA + 1) - 1) * sizeof(MIB_IPADDRROW));
        if (ipAddrs && coalesceTable)
        {
            if (GetIpAddrTable(ipAddrs, &size, FALSE) == ERROR_SUCCESS)
            {
                DWORD ndx;

                for (ndx = 0; ndx < ipAddrs->dwNumEntries; ndx++)
                {
                    if ((ipAddrs->table[ndx].dwAddr &
                     ipAddrs->table[ndx].dwMask) !=
                     htonl((INADDR_LOOPBACK & IN_CLASSA_NET)))
                    {
                        BOOL newNetwork = TRUE;
                        DWORD innerIndex;

                        /* make sure we don't have more than one entry
                         * for a subnet */
                        for (innerIndex = 0; newNetwork &&
                         innerIndex < coalesceTable->dwNumEntries; innerIndex++)
                            if ((ipAddrs->table[ndx].dwAddr &
                             ipAddrs->table[ndx].dwMask) ==
                             (coalesceTable->table[innerIndex].dwAddr
                             & coalesceTable->table[innerIndex].dwMask))
                                newNetwork = FALSE;

                        if (newNetwork)
                            memcpy(&coalesceTable->table[
                             coalesceTable->dwNumEntries++],
                             &ipAddrs->table[ndx], sizeof(MIB_IPADDRROW));
                    }
                }

                NetBIOSEnumAdapters(gTransportID, NetBTEnumCallback,
                 coalesceTable);
                ret = NRC_GOODRET;
                for (ndx = 0; ret == NRC_GOODRET &&
                 ndx < coalesceTable->dwNumEntries; ndx++)
                    if (coalesceTable->table[ndx].dwAddr != INADDR_LOOPBACK)
                        ret = NetBTRegisterAdapter(&coalesceTable->table[ndx]);
            }
            else
                ret = NRC_SYSTEM;
            HeapFree(GetProcessHeap(), 0, ipAddrs);
            HeapFree(GetProcessHeap(), 0, coalesceTable);
        }
        else
            ret = NRC_OSRESNOTAV;
    }
    else
        ret = NRC_SYSTEM;
    TRACE("returning 0x%02x\n", ret);
    return ret;
}

1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439
static const WCHAR VxD_MSTCPW[] = { 'S','Y','S','T','E','M','\\','C','u','r',
 'r','e','n','t','C','o','n','t','r','o','l','S','e','t','\\','S','e','r','v',
 'i','c','e','s','\\','V','x','D','\\','M','S','T','C','P','\0' };
static const WCHAR NetBT_ParametersW[] = { 'S','Y','S','T','E','M','\\','C','u',
 'r','r','e','n','t','C','o','n','t','r','o','l','S','e','t','\\','S','e','r',
 'v','i','c','e','s','\\','N','e','t','B','T','\\','P','a','r','a','m','e','t',
 'e','r','s','\0' };
static const WCHAR EnableDNSW[] = { 'E','n','a','b','l','e','D','N','S','\0' };
static const WCHAR BcastNameQueryCountW[] = { 'B','c','a','s','t','N','a','m',
 'e','Q','u','e','r','y','C','o','u','n','t','\0' };
static const WCHAR BcastNameQueryTimeoutW[] = { 'B','c','a','s','t','N','a','m',
 'e','Q','u','e','r','y','T','i','m','e','o','u','t','\0' };
static const WCHAR NameSrvQueryCountW[] = { 'N','a','m','e','S','r','v',
 'Q','u','e','r','y','C','o','u','n','t','\0' };
static const WCHAR NameSrvQueryTimeoutW[] = { 'N','a','m','e','S','r','v',
 'Q','u','e','r','y','T','i','m','e','o','u','t','\0' };
static const WCHAR ScopeIDW[] = { 'S','c','o','p','e','I','D','\0' };
static const WCHAR CacheTimeoutW[] = { 'C','a','c','h','e','T','i','m','e','o',
 'u','t','\0' };
static const WCHAR Config_NetworkW[] = { 'S','o','f','t','w','a','r','e','\\',
1440
                                         'W','i','n','e','\\','N','e','t','w','o','r','k','\0' };
1441

1442 1443 1444 1445 1446
/* Initializes global variables and registers the NetBT transport */
void NetBTInit(void)
{
    HKEY hKey;
    NetBIOSTransport transport;
1447
    LONG ret;
1448 1449 1450

    TRACE("\n");

1451
    gEnableDNS = TRUE;
1452 1453 1454 1455 1456 1457 1458 1459 1460
    gBCastQueries = BCAST_QUERIES;
    gBCastQueryTimeout = BCAST_QUERY_TIMEOUT;
    gWINSQueries = WINS_QUERIES;
    gWINSQueryTimeout = WINS_QUERY_TIMEOUT;
    gNumWINSServers = 0;
    memset(gWINSServers, 0, sizeof(gWINSServers));
    gScopeID[0] = '\0';
    gCacheTimeout = CACHE_TIMEOUT;

1461
    /* Try to open the Win9x NetBT configuration key */
1462
    ret = RegOpenKeyExW(HKEY_LOCAL_MACHINE, VxD_MSTCPW, 0, KEY_READ, &hKey);
1463 1464
    /* If that fails, try the WinNT NetBT configuration key */
    if (ret != ERROR_SUCCESS)
1465 1466
        ret = RegOpenKeyExW(HKEY_LOCAL_MACHINE, NetBT_ParametersW, 0, KEY_READ,
         &hKey);
1467
    if (ret == ERROR_SUCCESS)
1468
    {
1469
        DWORD dword, size;
1470

1471
        size = sizeof(dword);
1472
        if (RegQueryValueExW(hKey, EnableDNSW, NULL, NULL,
1473 1474
         (LPBYTE)&dword, &size) == ERROR_SUCCESS)
            gEnableDNS = dword;
1475
        size = sizeof(dword);
1476
        if (RegQueryValueExW(hKey, BcastNameQueryCountW, NULL, NULL,
1477 1478 1479 1480
         (LPBYTE)&dword, &size) == ERROR_SUCCESS && dword >= MIN_QUERIES
         && dword <= MAX_QUERIES)
            gBCastQueries = dword;
        size = sizeof(dword);
1481
        if (RegQueryValueExW(hKey, BcastNameQueryTimeoutW, NULL, NULL,
1482 1483 1484 1485
         (LPBYTE)&dword, &size) == ERROR_SUCCESS && dword >= MIN_QUERY_TIMEOUT
         && dword <= MAX_QUERY_TIMEOUT)
            gBCastQueryTimeout = dword;
        size = sizeof(dword);
1486
        if (RegQueryValueExW(hKey, NameSrvQueryCountW, NULL, NULL,
1487 1488 1489 1490
         (LPBYTE)&dword, &size) == ERROR_SUCCESS && dword >= MIN_QUERIES
         && dword <= MAX_QUERIES)
            gWINSQueries = dword;
        size = sizeof(dword);
1491
        if (RegQueryValueExW(hKey, NameSrvQueryTimeoutW, NULL, NULL,
1492 1493 1494 1495
         (LPBYTE)&dword, &size) == ERROR_SUCCESS && dword >= MIN_QUERY_TIMEOUT
         && dword <= MAX_QUERY_TIMEOUT)
            gWINSQueryTimeout = dword;
        size = MAX_DOMAIN_NAME_LEN - 1;
1496
        if (RegQueryValueExW(hKey, ScopeIDW, NULL, NULL, (LPBYTE)gScopeID + 1, &size)
1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511
         == ERROR_SUCCESS)
        {
            /* convert into L2-encoded version, suitable for use by
               NetBTNameEncode */
            char *ptr, *lenPtr;

            for (ptr = gScopeID + 1; *ptr &&
             ptr - gScopeID < MAX_DOMAIN_NAME_LEN; )
            {
                for (lenPtr = ptr - 1, *lenPtr = 0; *ptr && *ptr != '.' &&
                 ptr - gScopeID < MAX_DOMAIN_NAME_LEN; ptr++)
                    *lenPtr += 1;
                ptr++;
            }
        }
1512
        if (RegQueryValueExW(hKey, CacheTimeoutW, NULL, NULL,
1513 1514 1515 1516
         (LPBYTE)&dword, &size) == ERROR_SUCCESS && dword >= MIN_CACHE_TIMEOUT)
            gCacheTimeout = dword;
        RegCloseKey(hKey);
    }
1517 1518 1519 1520
    /* WINE-specific NetBT registry settings.  Because our adapter naming is
     * different than MS', we can't do per-adapter WINS configuration in the
     * same place.  Just do a global WINS configuration instead.
     */
1521 1522
    /* @@ Wine registry key: HKCU\Software\Wine\Network */
    if (RegOpenKeyW(HKEY_CURRENT_USER, Config_NetworkW, &hKey) == ERROR_SUCCESS)
1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542
    {
        static const char *nsValueNames[] = { "WinsServer", "BackupWinsServer" };
        char nsString[16];
        DWORD size, ndx;

        for (ndx = 0; ndx < sizeof(nsValueNames) / sizeof(nsValueNames[0]);
         ndx++)
        {
            size = sizeof(nsString) / sizeof(char);
            if (RegQueryValueExA(hKey, nsValueNames[ndx], NULL, NULL,
             (LPBYTE)nsString, &size) == ERROR_SUCCESS)
            {
                unsigned long addr = inet_addr(nsString);

                if (addr != INADDR_NONE && gNumWINSServers < MAX_WINS_SERVERS)
                    gWINSServers[gNumWINSServers++] = addr;
            }
        }
        RegCloseKey(hKey);
    }
1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555

    transport.enumerate      = NetBTEnum;
    transport.astat          = NetBTAstat;
    transport.findName       = NetBTFindName;
    transport.call           = NetBTCall;
    transport.send           = NetBTSend;
    transport.recv           = NetBTRecv;
    transport.hangup         = NetBTHangup;
    transport.cleanupAdapter = NetBTCleanupAdapter;
    transport.cleanup        = NetBTCleanup;
    memcpy(&gTransportID, TRANSPORT_NBT, sizeof(ULONG));
    NetBIOSRegisterTransport(gTransportID, &transport);
}