rdp.c

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/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Protocol services - RDP layer
   Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
   Copyright 2003-2011 Peter Astrand <astrand@cendio.se> for Cendio AB
   Copyright 2011-2014 Henrik Andersson <hean01@cendio.se> for Cendio AB
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
   This program 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 General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#include "precomp.h"
 
extern uint16 g_mcs_userid;
extern char g_username[256];
extern char g_password[256];
char g_codepage[16];
extern RD_BOOL g_bitmap_compression;
extern RD_BOOL g_orders;
extern RD_BOOL g_encryption;
extern RD_BOOL g_desktop_save;
extern RD_BOOL g_polygon_ellipse_orders;
extern RDP_VERSION g_rdp_version;
extern uint16 g_server_rdp_version;
extern uint32 g_rdp5_performanceflags;
extern int g_server_depth;
extern int g_width;
extern int g_height;
extern RD_BOOL g_bitmap_cache;
extern RD_BOOL g_bitmap_cache_persist_enable;
extern RD_BOOL g_numlock_sync;
extern RD_BOOL g_pending_resize;
extern RD_BOOL g_network_error;
 
uint8 *g_next_packet;
uint32 g_rdp_shareid;
 
extern RDPCOMP g_mppc_dict;
 
/* Session Directory support */
extern RD_BOOL g_redirect;
extern char *g_redirect_server;
extern uint32 g_redirect_server_len;
extern char *g_redirect_domain;
extern uint32 g_redirect_domain_len;
extern char *g_redirect_username;
extern uint32 g_redirect_username_len;
extern uint8 *g_redirect_lb_info;
extern uint32 g_redirect_lb_info_len;
extern uint8 *g_redirect_cookie;
extern uint32 g_redirect_cookie_len;
extern uint32 g_redirect_flags;
extern uint32 g_redirect_session_id;
 
/* END Session Directory support */
 
extern uint32 g_reconnect_logonid;
extern char g_reconnect_random[16];
extern time_t g_reconnect_random_ts;
extern RD_BOOL g_has_reconnect_random;
extern uint8 g_client_random[SEC_RANDOM_SIZE];
 
void rdssl_hmac_md5(char* key, int keylen, char* data, int len, char* output);
 
#if WITH_DEBUG
static uint32 g_packetno;
#endif
 
#ifdef HAVE_ICONV
static RD_BOOL g_iconv_works = True;
#endif
 
/* Receive an RDP packet */
static STREAM
rdp_recv(uint8 * type)
{
    static STREAM rdp_s;
    uint16 length, pdu_type;
    uint8 rdpver;
 
    if ((rdp_s == NULL) || (g_next_packet >= rdp_s->end) || (g_next_packet == NULL))
    {
        rdp_s = sec_recv(&rdpver);
        if (rdp_s == NULL)
            return NULL;
        if (rdpver == 0xff)
        {
            g_next_packet = rdp_s->end;
            *type = 0;
            return rdp_s;
        }
        else if (rdpver != 3)
        {
            /* rdp5_process should move g_next_packet ok */
            rdp5_process(rdp_s);
            *type = 0;
            return rdp_s;
        }
 
        g_next_packet = rdp_s->p;
    }
    else
    {
        rdp_s->p = g_next_packet;
    }
 
    in_uint16_le(rdp_s, length);
    /* 32k packets are really 8, keepalive fix */
    if (length == 0x8000)
    {
        g_next_packet += 8;
        *type = 0;
        return rdp_s;
    }
    in_uint16_le(rdp_s, pdu_type);
    in_uint8s(rdp_s, 2);    /* userid */
    *type = pdu_type & 0xf;
 
#ifdef WITH_DEBUG
    DEBUG(("RDP packet #%d, (type %x)\n", ++g_packetno, *type));
    hexdump(g_next_packet, length);
#endif /*  */
 
    g_next_packet += length;
    return rdp_s;
}
 
/* Initialise an RDP data packet */
static STREAM
rdp_init_data(int maxlen)
{
    STREAM s;
 
    s = sec_init(g_encryption ? SEC_ENCRYPT : 0, maxlen + 18);
    s_push_layer(s, rdp_hdr, 18);
 
    return s;
}
 
/* Send an RDP data packet */
static void
rdp_send_data(STREAM s, uint8 data_pdu_type)
{
    uint16 length;
 
    s_pop_layer(s, rdp_hdr);
    length = s->end - s->p;
 
    out_uint16_le(s, length);
    out_uint16_le(s, (RDP_PDU_DATA | 0x10));
    out_uint16_le(s, (g_mcs_userid + 1001));
 
    out_uint32_le(s, g_rdp_shareid);
    out_uint8(s, 0);    /* pad */
    out_uint8(s, 1);    /* streamid */
    out_uint16_le(s, (length - 14));
    out_uint8(s, data_pdu_type);
    out_uint8(s, 0);    /* compress_type */
    out_uint16(s, 0);   /* compress_len */
 
    sec_send(s, g_encryption ? SEC_ENCRYPT : 0);
}
 
/* Output a string in Unicode with mandatory null termination. If
   string is NULL or len is 0, write an unicode null termination to
   stream. */
void
rdp_out_unistr_mandatory_null(STREAM s, char *string, int len)
{
    if (string && len > 0)
        rdp_out_unistr(s, string, len);
    else
        out_uint16_le(s, 0);
}
 
/* Output a string in Unicode */
void
rdp_out_unistr(STREAM s, char *string, int len)
{
    if (string == NULL || len == 0)
        return;
 
#ifdef HAVE_ICONV
    size_t ibl = strlen(string), obl = len + 2;
    static iconv_t iconv_h = (iconv_t) - 1;
    char *pin = string, *pout = (char *) s->p;
 
    memset(pout, 0, len + 4);
 
    if (g_iconv_works)
    {
        if (iconv_h == (iconv_t) - 1)
        {
            size_t i = 1, o = 4;
            if ((iconv_h = iconv_open(WINDOWS_CODEPAGE, g_codepage)) == (iconv_t) - 1)
            {
                warning("rdp_out_unistr: iconv_open[%s -> %s] fail %d\n",
                    g_codepage, WINDOWS_CODEPAGE, (int) iconv_h);
 
                g_iconv_works = False;
                rdp_out_unistr(s, string, len);
                return;
            }
            if (iconv(iconv_h, (ICONV_CONST char **) &pin, &i, &pout, &o) ==
                (size_t) - 1)
            {
                iconv_close(iconv_h);
                iconv_h = (iconv_t) - 1;
                warning("rdp_out_unistr: iconv(1) fail, errno %d\n", errno);
 
                g_iconv_works = False;
                rdp_out_unistr(s, string, len);
                return;
            }
            pin = string;
            pout = (char *) s->p;
        }
 
        if (iconv(iconv_h, (ICONV_CONST char **) &pin, &ibl, &pout, &obl) == (size_t) - 1)
        {
            iconv_close(iconv_h);
            iconv_h = (iconv_t) - 1;
            warning("rdp_out_unistr: iconv(2) fail, errno %d\n", errno);
 
            g_iconv_works = False;
            rdp_out_unistr(s, string, len);
            return;
        }
 
        s->p += len + 2;
 
    }
    else
#endif
    {
        int i = 0, j = 0;
 
        len += 2;
 
        while (i < len)
        {
            s->p[i++] = string[j++];
            s->p[i++] = 0;
        }
 
        s->p += len;
    }
}
 
/* Input a string in Unicode
 *
 * Returns str_len of string
 */
void
rdp_in_unistr(STREAM s, int in_len, char **string, uint32 * str_size)
{
    /* Dynamic allocate of destination string if not provided */
    *string = xmalloc(in_len * 2);
    *str_size = in_len * 2;
 
#ifdef HAVE_ICONV
    size_t ibl = in_len, obl = *str_size - 1;
    char *pin = (char *) s->p, *pout = *string;
    static iconv_t iconv_h = (iconv_t) - 1;
 
    if (g_iconv_works)
    {
        if (iconv_h == (iconv_t) - 1)
        {
            if ((iconv_h = iconv_open(g_codepage, WINDOWS_CODEPAGE)) == (iconv_t) - 1)
            {
                warning("rdp_in_unistr: iconv_open[%s -> %s] fail %d\n",
                    WINDOWS_CODEPAGE, g_codepage, (int) iconv_h);
 
                g_iconv_works = False;
                return rdp_in_unistr(s, in_len, string, str_size);
            }
        }
 
        if (iconv(iconv_h, (ICONV_CONST char **) &pin, &ibl, &pout, &obl) == (size_t) - 1)
        {
            if (errno == E2BIG)
            {
                warning("server sent an unexpectedly long string, truncating\n");
            }
            else
            {
                warning("rdp_in_unistr: iconv fail, errno %d\n", errno);
 
                free(*string);
                *string = NULL;
                *str_size = 0;
            }
        }
 
        /* we must update the location of the current STREAM for future reads of s->p */
        s->p += in_len;
 
        *pout = 0;
 
        if (*string)
            *str_size = pout - *string;
    }
    else
#endif
    {
        int i = 0;
        int rem = 0;
        uint32 len = in_len / 2;
 
        if (len > *str_size - 1)
        {
            warning("server sent an unexpectedly long string, truncating\n");
            len = *str_size - 1;
            rem = in_len - 2 * len;
        }
 
        while (i < len)
        {
            in_uint8a(s, &string[i++], 1);
            in_uint8s(s, 1);
        }
 
        in_uint8s(s, rem);
        string[len] = 0;
        *str_size = len;
    }
}
 
 
/* Parse a logon info packet */
static void
rdp_send_logon_info(uint32 flags, char *domain, char *user,
            char *password, char *program, char *directory)
{
    char *ipaddr = tcp_get_address();
    /* length of string in TS_INFO_PACKET excludes null terminator */
    int len_domain = 2 * strlen(domain);
    int len_user = 2 * strlen(user);
    int len_password = 2 * strlen(password);
    int len_program = 2 * strlen(program);
    int len_directory = 2 * strlen(directory);
 
    /* length of strings in TS_EXTENDED_PACKET includes null terminator */
    char dllName[MAX_PATH];
    int len_ip = 2 * strlen(ipaddr) + 2;
    int len_dll = 0;
 
    int packetlen = 0;
    uint32 sec_flags = g_encryption ? (SEC_INFO_PKT | SEC_ENCRYPT) : SEC_INFO_PKT;
    STREAM s;
    time_t t = time(NULL);
    time_t tzone;
    uint8 security_verifier[16];
 
    GetModuleFileNameA(NULL, dllName, ARRAYSIZE(dllName));
    len_dll = 2 * strlen(dllName) + 2;
 
    if (g_rdp_version == RDP_V4 || 1 == g_server_rdp_version)
    {
        DEBUG_RDP5(("Sending RDP4-style Logon packet\n"));
 
        s = sec_init(sec_flags, 18 + len_domain + len_user + len_password
                 + len_program + len_directory + 10);
 
        out_uint32(s, 0);
        out_uint32_le(s, flags);
        out_uint16_le(s, len_domain);
        out_uint16_le(s, len_user);
        out_uint16_le(s, len_password);
        out_uint16_le(s, len_program);
        out_uint16_le(s, len_directory);
 
        rdp_out_unistr_mandatory_null(s, domain, len_domain);
        rdp_out_unistr_mandatory_null(s, user, len_user);
        rdp_out_unistr_mandatory_null(s, password, len_password);
        rdp_out_unistr_mandatory_null(s, program, len_program);
        rdp_out_unistr_mandatory_null(s, directory, len_directory);
    }
    else
    {
        DEBUG_RDP5(("Sending RDP5-style Logon packet\n"));
 
        if (g_redirect == True && g_redirect_cookie_len > 0)
        {
            flags |= RDP_INFO_AUTOLOGON;
            len_password = g_redirect_cookie_len;
            len_password -= 2;  /* substract 2 bytes which is added below */
        }
 
        packetlen =
            /* size of TS_INFO_PACKET */
            4 + /* CodePage */
            4 + /* flags */
            2 + /* cbDomain */
            2 + /* cbUserName */
            2 + /* cbPassword */
            2 + /* cbAlternateShell */
            2 + /* cbWorkingDir */
            2 + len_domain +    /* Domain */
            2 + len_user +  /* UserName */
            2 + len_password +  /* Password */
            2 + len_program +   /* AlternateShell */
            2 + len_directory + /* WorkingDir */
            /* size of TS_EXTENDED_INFO_PACKET */
            2 + /* clientAddressFamily */
            2 + /* cbClientAddress */
            len_ip +    /* clientAddress */
            2 + /* cbClientDir */
            len_dll +   /* clientDir */
            /* size of TS_TIME_ZONE_INFORMATION */
            4 + /* Bias, (UTC = local time + bias */
            64 +    /* StandardName, 32 unicode char array, Descriptive standard time on client */
            16 +    /* StandardDate */
            4 + /* StandardBias */
            64 +    /* DaylightName, 32 unicode char array */
            16 +    /* DaylightDate */
            4 + /* DaylightBias */
            4 + /* clientSessionId */
            4 + /* performanceFlags */
            2 + /* cbAutoReconnectCookie, either 0 or 0x001c */
            /* size of ARC_CS_PRIVATE_PACKET */
            28; /* autoReconnectCookie */
 
 
        s = sec_init(sec_flags, packetlen);
        DEBUG_RDP5(("Called sec_init with packetlen %d\n", packetlen));
 
        /* TS_INFO_PACKET */
        out_uint32(s, 0);   /* Code Page */
        out_uint32_le(s, flags);
        out_uint16_le(s, len_domain);
        out_uint16_le(s, len_user);
        out_uint16_le(s, len_password);
        out_uint16_le(s, len_program);
        out_uint16_le(s, len_directory);
 
        rdp_out_unistr_mandatory_null(s, domain, len_domain);
        rdp_out_unistr_mandatory_null(s, user, len_user);
 
        if (g_redirect == True && 0 < g_redirect_cookie_len)
        {
            out_uint8p(s, g_redirect_cookie, g_redirect_cookie_len);
        }
        else
        {
            rdp_out_unistr_mandatory_null(s, password, len_password);
        }
 
 
        rdp_out_unistr_mandatory_null(s, program, len_program);
        rdp_out_unistr_mandatory_null(s, directory, len_directory);
 
        /* TS_EXTENDED_INFO_PACKET */
        out_uint16_le(s, 2);    /* clientAddressFamily = AF_INET */
        out_uint16_le(s, len_ip);   /* cbClientAddress */
        rdp_out_unistr_mandatory_null(s, ipaddr, len_ip - 2);   /* clientAddress */
        out_uint16_le(s, len_dll);  /* cbClientDir */
        rdp_out_unistr(s, dllName, len_dll - 2);    /* clientDir */
 
        /* TS_TIME_ZONE_INFORMATION */
        tzone = (mktime(gmtime(&t)) - mktime(localtime(&t))) / 60;
        out_uint32_le(s, tzone);
        rdp_out_unistr(s, "GTB, normaltid", 2 * strlen("GTB, normaltid"));
        out_uint8s(s, 62 - 2 * strlen("GTB, normaltid"));
        out_uint32_le(s, 0x0a0000);
        out_uint32_le(s, 0x050000);
        out_uint32_le(s, 3);
        out_uint32_le(s, 0);
        out_uint32_le(s, 0);
        rdp_out_unistr(s, "GTB, sommartid", 2 * strlen("GTB, sommartid"));
        out_uint8s(s, 62 - 2 * strlen("GTB, sommartid"));
        out_uint32_le(s, 0x30000);
        out_uint32_le(s, 0x050000);
        out_uint32_le(s, 2);
        out_uint32(s, 0);
        out_uint32_le(s, 0xffffffc4);   /* DaylightBias */
 
        /* Rest of TS_EXTENDED_INFO_PACKET */
        out_uint32_le(s, 0);    /* clientSessionId (Ignored by server MUST be 0) */
        out_uint32_le(s, g_rdp5_performanceflags);
 
        /* Client Auto-Reconnect */
        if (g_has_reconnect_random)
        {
            out_uint16_le(s, 28);   /* cbAutoReconnectLen */
            /* ARC_CS_PRIVATE_PACKET */
            out_uint32_le(s, 28);   /* cbLen */
            out_uint32_le(s, 1);    /* Version */
            out_uint32_le(s, g_reconnect_logonid);  /* LogonId */
            rdssl_hmac_md5(g_reconnect_random, sizeof(g_reconnect_random),
                           (char *)g_client_random, SEC_RANDOM_SIZE, (char *)security_verifier);
            out_uint8a(s, security_verifier, sizeof(security_verifier));
        }
        else
        {
            out_uint16_le(s, 0);    /* cbAutoReconnectLen */
        }
    }
    s_mark_end(s);
 
    /* clear the redirect flag */
    g_redirect = False;
 
    sec_send(s, sec_flags);
}
 
/* Send a control PDU */
static void
rdp_send_control(uint16 action)
{
    STREAM s;
 
    s = rdp_init_data(8);
 
    out_uint16_le(s, action);
    out_uint16(s, 0);   /* userid */
    out_uint32(s, 0);   /* control id */
 
    s_mark_end(s);
    rdp_send_data(s, RDP_DATA_PDU_CONTROL);
}
 
/* Send a synchronisation PDU */
static void
rdp_send_synchronise(void)
{
    STREAM s;
 
    s = rdp_init_data(4);
 
    out_uint16_le(s, 1);    /* type */
    out_uint16_le(s, 1002);
 
    s_mark_end(s);
    rdp_send_data(s, RDP_DATA_PDU_SYNCHRONISE);
}
 
/* Send a single input event */
void
rdp_send_input(uint32 time, uint16 message_type, uint16 device_flags, uint16 param1, uint16 param2)
{
    STREAM s;
 
    s = rdp_init_data(16);
 
    out_uint16_le(s, 1);    /* number of events */
    out_uint16(s, 0);   /* pad */
 
    out_uint32_le(s, time);
    out_uint16_le(s, message_type);
    out_uint16_le(s, device_flags);
    out_uint16_le(s, param1);
    out_uint16_le(s, param2);
 
    s_mark_end(s);
    rdp_send_data(s, RDP_DATA_PDU_INPUT);
}
 
/* Send a client window information PDU */
void
rdp_send_client_window_status(int status)
{
    STREAM s;
    static int current_status = 1;
 
    if (current_status == status)
        return;
 
    s = rdp_init_data(12);
 
    out_uint32_le(s, status);
 
    switch (status)
    {
        case 0: /* shut the server up */
            break;
 
        case 1: /* receive data again */
            out_uint32_le(s, 0);    /* unknown */
            out_uint16_le(s, g_width);
            out_uint16_le(s, g_height);
            break;
    }
 
    s_mark_end(s);
    rdp_send_data(s, RDP_DATA_PDU_CLIENT_WINDOW_STATUS);
    current_status = status;
}
 
/* Send persistent bitmap cache enumeration PDU's */
static void
rdp_enum_bmpcache2(void)
{
    STREAM s;
    HASH_KEY keylist[BMPCACHE2_NUM_PSTCELLS];
    uint32 num_keys, offset, count, flags;
 
    offset = 0;
    num_keys = pstcache_enumerate(2, keylist);
 
    while (offset < num_keys)
    {
        count = MIN(num_keys - offset, 169);
 
        s = rdp_init_data(24 + count * sizeof(HASH_KEY));
 
        flags = 0;
        if (offset == 0)
            flags |= PDU_FLAG_FIRST;
        if (num_keys - offset <= 169)
            flags |= PDU_FLAG_LAST;
 
        /* header */
        out_uint32_le(s, 0);
        out_uint16_le(s, count);
        out_uint16_le(s, 0);
        out_uint16_le(s, 0);
        out_uint16_le(s, 0);
        out_uint16_le(s, 0);
        out_uint16_le(s, num_keys);
        out_uint32_le(s, 0);
        out_uint32_le(s, flags);
 
        /* list */
        out_uint8a(s, keylist[offset], count * sizeof(HASH_KEY));
 
        s_mark_end(s);
        rdp_send_data(s, 0x2b);
 
        offset += 169;
    }
}
 
/* Send an (empty) font information PDU */
static void
rdp_send_fonts(uint16 seq)
{
    STREAM s;
 
    s = rdp_init_data(8);
 
    out_uint16(s, 0);   /* number of fonts */
    out_uint16_le(s, 0);    /* pad? */
    out_uint16_le(s, seq);  /* unknown */
    out_uint16_le(s, 0x32); /* entry size */
 
    s_mark_end(s);
    rdp_send_data(s, RDP_DATA_PDU_FONT2);
}
 
/* Output general capability set */
static void
rdp_out_general_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_GENERAL);
    out_uint16_le(s, RDP_CAPLEN_GENERAL);
 
    out_uint16_le(s, 1);    /* OS major type */
    out_uint16_le(s, 3);    /* OS minor type */
    out_uint16_le(s, 0x200);    /* Protocol version */
    out_uint16(s, 0);   /* Pad */
    out_uint16(s, 0);   /* Compression types */
    out_uint16_le(s, (g_rdp_version >= RDP_V5) ? 0x40d : 0);
    /* Pad, according to T.128. 0x40d seems to 
       trigger
       the server to start sending RDP5 packets. 
       However, the value is 0x1d04 with W2KTSK and
       NT4MS. Hmm.. Anyway, thankyou, Microsoft,
       for sending such information in a padding 
       field.. */
    out_uint16(s, 0);   /* Update capability */
    out_uint16(s, 0);   /* Remote unshare capability */
    out_uint16(s, 0);   /* Compression level */
    out_uint16(s, 0);   /* Pad */
}
 
/* Output bitmap capability set */
static void
rdp_out_bitmap_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_BITMAP);
    out_uint16_le(s, RDP_CAPLEN_BITMAP);
 
    out_uint16_le(s, g_server_depth);   /* Preferred colour depth */
    out_uint16_le(s, 1);    /* Receive 1 BPP */
    out_uint16_le(s, 1);    /* Receive 4 BPP */
    out_uint16_le(s, 1);    /* Receive 8 BPP */
    out_uint16_le(s, 800);  /* Desktop width */
    out_uint16_le(s, 600);  /* Desktop height */
    out_uint16(s, 0);   /* Pad */
    out_uint16(s, 1);   /* Allow resize */
    out_uint16_le(s, g_bitmap_compression ? 1 : 0); /* Support compression */
    out_uint16(s, 0);   /* Unknown */
    out_uint16_le(s, 1);    /* Unknown */
    out_uint16(s, 0);   /* Pad */
}
 
/* Output order capability set */
static void
rdp_out_order_caps(STREAM s)
{
    uint8 order_caps[32];
 
    memset(order_caps, 0, 32);
    order_caps[0] = 1;  /* dest blt */
    order_caps[1] = 1;  /* pat blt */
    order_caps[2] = 1;  /* screen blt */
    order_caps[3] = (g_bitmap_cache ? 1 : 0);   /* memblt */
    order_caps[4] = 0;  /* triblt */
    order_caps[8] = 1;  /* line */
    order_caps[9] = 1;  /* line */
    order_caps[10] = 1; /* rect */
    order_caps[11] = (g_desktop_save ? 1 : 0);  /* desksave */
    order_caps[13] = 1; /* memblt */
    order_caps[14] = 1; /* triblt */
    order_caps[20] = (g_polygon_ellipse_orders ? 1 : 0);    /* polygon */
    order_caps[21] = (g_polygon_ellipse_orders ? 1 : 0);    /* polygon2 */
    order_caps[22] = 1; /* polyline */
    order_caps[25] = (g_polygon_ellipse_orders ? 1 : 0);    /* ellipse */
    order_caps[26] = (g_polygon_ellipse_orders ? 1 : 0);    /* ellipse2 */
    order_caps[27] = 1; /* text2 */
    out_uint16_le(s, RDP_CAPSET_ORDER);
    out_uint16_le(s, RDP_CAPLEN_ORDER);
 
    out_uint8s(s, 20);  /* Terminal desc, pad */
    out_uint16_le(s, 1);    /* Cache X granularity */
    out_uint16_le(s, 20);   /* Cache Y granularity */
    out_uint16(s, 0);   /* Pad */
    out_uint16_le(s, 1);    /* Max order level */
    out_uint16_le(s, 0x147);    /* Number of fonts */
    out_uint16_le(s, 0x2a); /* Capability flags */
    out_uint8p(s, order_caps, 32);  /* Orders supported */
    out_uint16_le(s, 0x6a1);    /* Text capability flags */
    out_uint8s(s, 6);   /* Pad */
    out_uint32_le(s, g_desktop_save == False ? 0 : 0x38400);    /* Desktop cache size */
    out_uint32(s, 0);   /* Unknown */
    out_uint32_le(s, 0x4e4);    /* Unknown */
}
 
/* Output bitmap cache capability set */
static void
rdp_out_bmpcache_caps(STREAM s)
{
    int Bpp;
    out_uint16_le(s, RDP_CAPSET_BMPCACHE);
    out_uint16_le(s, RDP_CAPLEN_BMPCACHE);
 
    Bpp = (g_server_depth + 7) / 8; /* bytes per pixel */
    out_uint8s(s, 24);  /* unused */
    out_uint16_le(s, 0x258);    /* entries */
    out_uint16_le(s, 0x100 * Bpp);  /* max cell size */
    out_uint16_le(s, 0x12c);    /* entries */
    out_uint16_le(s, 0x400 * Bpp);  /* max cell size */
    out_uint16_le(s, 0x106);    /* entries */
    out_uint16_le(s, 0x1000 * Bpp); /* max cell size */
}
 
/* Output bitmap cache v2 capability set */
static void
rdp_out_bmpcache2_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_BMPCACHE2);
    out_uint16_le(s, RDP_CAPLEN_BMPCACHE2);
 
    out_uint16_le(s, g_bitmap_cache_persist_enable ? 2 : 0);    /* version */
 
    out_uint16_be(s, 3);    /* number of caches in this set */
 
    /* max cell size for cache 0 is 16x16, 1 = 32x32, 2 = 64x64, etc */
    out_uint32_le(s, BMPCACHE2_C0_CELLS);
    out_uint32_le(s, BMPCACHE2_C1_CELLS);
    if (pstcache_init(2))
    {
        out_uint32_le(s, BMPCACHE2_NUM_PSTCELLS | BMPCACHE2_FLAG_PERSIST);
    }
    else
    {
        out_uint32_le(s, BMPCACHE2_C2_CELLS);
    }
    out_uint8s(s, 20);  /* other bitmap caches not used */
}
 
/* Output control capability set */
static void
rdp_out_control_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_CONTROL);
    out_uint16_le(s, RDP_CAPLEN_CONTROL);
 
    out_uint16(s, 0);   /* Control capabilities */
    out_uint16(s, 0);   /* Remote detach */
    out_uint16_le(s, 2);    /* Control interest */
    out_uint16_le(s, 2);    /* Detach interest */
}
 
/* Output activation capability set */
static void
rdp_out_activate_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_ACTIVATE);
    out_uint16_le(s, RDP_CAPLEN_ACTIVATE);
 
    out_uint16(s, 0);   /* Help key */
    out_uint16(s, 0);   /* Help index key */
    out_uint16(s, 0);   /* Extended help key */
    out_uint16(s, 0);   /* Window activate */
}
 
/* Output pointer capability set */
static void
rdp_out_pointer_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_POINTER);
    out_uint16_le(s, RDP_CAPLEN_POINTER);
 
    out_uint16(s, 0);   /* Colour pointer */
    out_uint16_le(s, 20);   /* Cache size */
}
 
/* Output new pointer capability set */
static void
rdp_out_newpointer_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_POINTER);
    out_uint16_le(s, RDP_CAPLEN_NEWPOINTER);
 
    out_uint16_le(s, 1);    /* Colour pointer */
    out_uint16_le(s, 20);   /* Cache size */
    out_uint16_le(s, 20);   /* Cache size for new pointers */
}
 
/* Output share capability set */
static void
rdp_out_share_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_SHARE);
    out_uint16_le(s, RDP_CAPLEN_SHARE);
 
    out_uint16(s, 0);   /* userid */
    out_uint16(s, 0);   /* pad */
}
 
/* Output colour cache capability set */
static void
rdp_out_colcache_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_COLCACHE);
    out_uint16_le(s, RDP_CAPLEN_COLCACHE);
 
    out_uint16_le(s, 6);    /* cache size */
    out_uint16(s, 0);   /* pad */
}
 
/* Output brush cache capability set */
static void
rdp_out_brushcache_caps(STREAM s)
{
    out_uint16_le(s, RDP_CAPSET_BRUSHCACHE);
    out_uint16_le(s, RDP_CAPLEN_BRUSHCACHE);
    out_uint32_le(s, 1);    /* cache type */
}
 
static uint8 caps_0x0d[] = {
    0x01, 0x00, 0x00, 0x00, 0x09, 0x04, 0x00, 0x00,
    0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00
};
 
static uint8 caps_0x0c[] = { 0x01, 0x00, 0x00, 0x00 };
 
static uint8 caps_0x0e[] = { 0x01, 0x00, 0x00, 0x00 };
 
static uint8 caps_0x10[] = {
    0xFE, 0x00, 0x04, 0x00, 0xFE, 0x00, 0x04, 0x00,
    0xFE, 0x00, 0x08, 0x00, 0xFE, 0x00, 0x08, 0x00,
    0xFE, 0x00, 0x10, 0x00, 0xFE, 0x00, 0x20, 0x00,
    0xFE, 0x00, 0x40, 0x00, 0xFE, 0x00, 0x80, 0x00,
    0xFE, 0x00, 0x00, 0x01, 0x40, 0x00, 0x00, 0x08,
    0x00, 0x01, 0x00, 0x01, 0x02, 0x00, 0x00, 0x00
};
 
/* Output unknown capability sets */
static void
rdp_out_unknown_caps(STREAM s, uint16 id, uint16 length, uint8 * caps)
{
    out_uint16_le(s, id);
    out_uint16_le(s, length);
 
    out_uint8p(s, caps, length - 4);
}
 
#define RDP5_FLAG 0x0030
/* Send a confirm active PDU */
static void
rdp_send_confirm_active(void)
{
    STREAM s;
    uint32 sec_flags = g_encryption ? (RDP5_FLAG | SEC_ENCRYPT) : RDP5_FLAG;
    uint16 caplen =
        RDP_CAPLEN_GENERAL + RDP_CAPLEN_BITMAP + RDP_CAPLEN_ORDER +
        RDP_CAPLEN_COLCACHE +
        RDP_CAPLEN_ACTIVATE + RDP_CAPLEN_CONTROL +
        RDP_CAPLEN_SHARE +
        RDP_CAPLEN_BRUSHCACHE + 0x58 + 0x08 + 0x08 + 0x34 /* unknown caps */  +
        4 /* w2k fix, sessionid */ ;
 
    if (g_rdp_version >= RDP_V5)
    {
        caplen += RDP_CAPLEN_BMPCACHE2;
        caplen += RDP_CAPLEN_NEWPOINTER;
    }
    else
    {
        caplen += RDP_CAPLEN_BMPCACHE;
        caplen += RDP_CAPLEN_POINTER;
    }
 
    s = sec_init(sec_flags, 6 + 14 + caplen + sizeof(RDP_SOURCE));
 
    out_uint16_le(s, 2 + 14 + caplen + sizeof(RDP_SOURCE));
    out_uint16_le(s, (RDP_PDU_CONFIRM_ACTIVE | 0x10));  /* Version 1 */
    out_uint16_le(s, (g_mcs_userid + 1001));
 
    out_uint32_le(s, g_rdp_shareid);
    out_uint16_le(s, 0x3ea);    /* userid */
    out_uint16_le(s, sizeof(RDP_SOURCE));
    out_uint16_le(s, caplen);
 
    out_uint8p(s, RDP_SOURCE, sizeof(RDP_SOURCE));
    out_uint16_le(s, 0xe);  /* num_caps */
    out_uint8s(s, 2);   /* pad */
 
    rdp_out_general_caps(s);
    rdp_out_bitmap_caps(s);
    rdp_out_order_caps(s);
    if (g_rdp_version >= RDP_V5)
    {
        rdp_out_bmpcache2_caps(s);
        rdp_out_newpointer_caps(s);
    }
    else
    {
        rdp_out_bmpcache_caps(s);
        rdp_out_pointer_caps(s);
    }
    rdp_out_colcache_caps(s);
    rdp_out_activate_caps(s);
    rdp_out_control_caps(s);
    rdp_out_share_caps(s);
    rdp_out_brushcache_caps(s);
 
    rdp_out_unknown_caps(s, 0x0d, 0x58, caps_0x0d); /* CAPSTYPE_INPUT */
    rdp_out_unknown_caps(s, 0x0c, 0x08, caps_0x0c); /* CAPSTYPE_SOUND */
    rdp_out_unknown_caps(s, 0x0e, 0x08, caps_0x0e); /* CAPSTYPE_FONT */
    rdp_out_unknown_caps(s, 0x10, 0x34, caps_0x10); /* CAPSTYPE_GLYPHCACHE */
 
    s_mark_end(s);
    sec_send(s, sec_flags);
}
 
/* Process a general capability set */
static void
rdp_process_general_caps(STREAM s)
{
    uint16 pad2octetsB; /* rdp5 flags? */
 
    in_uint8s(s, 10);
    in_uint16_le(s, pad2octetsB);
 
    if (!pad2octetsB)
        g_rdp_version = RDP_V4;
}
 
/* Process a bitmap capability set */
static void
rdp_process_bitmap_caps(STREAM s)
{
    uint16 width, height, depth;
 
    in_uint16_le(s, depth);
    in_uint8s(s, 6);
 
    in_uint16_le(s, width);
    in_uint16_le(s, height);
 
    DEBUG(("setting desktop size and depth to: %dx%dx%d\n", width, height, depth));
 
    /*
     * The server may limit depth and change the size of the desktop (for
     * example when shadowing another session).
     */
    if (g_server_depth != depth)
    {
        warning("Remote desktop does not support colour depth %d; falling back to %d\n",
            g_server_depth, depth);
        g_server_depth = depth;
    }
    if (g_width != width || g_height != height)
    {
        warning("Remote desktop changed from %dx%d to %dx%d.\n", g_width, g_height,
            width, height);
        g_width = width;
        g_height = height;
        ui_resize_window();
    }
}
 
/* Process server capabilities */
static void
rdp_process_server_caps(STREAM s, uint16 length)
{
    int n;
    uint8 *next, *start;
    uint16 ncapsets, capset_type, capset_length;
 
    start = s->p;
 
    in_uint16_le(s, ncapsets);
    in_uint8s(s, 2);    /* pad */
 
    for (n = 0; n < ncapsets; n++)
    {
        if (s->p > start + length)
            return;
 
        in_uint16_le(s, capset_type);
        in_uint16_le(s, capset_length);
 
        next = s->p + capset_length - 4;
 
        switch (capset_type)
        {
            case RDP_CAPSET_GENERAL:
                rdp_process_general_caps(s);
                break;
 
            case RDP_CAPSET_BITMAP:
                rdp_process_bitmap_caps(s);
                break;
        }
 
        s->p = next;
    }
}
 
/* Respond to a demand active PDU */
static void
process_demand_active(STREAM s)
{
    uint8 type;
    uint16 len_src_descriptor, len_combined_caps;
 
    in_uint32_le(s, g_rdp_shareid);
    in_uint16_le(s, len_src_descriptor);
    in_uint16_le(s, len_combined_caps);
    in_uint8s(s, len_src_descriptor);
 
    DEBUG(("DEMAND_ACTIVE(id=0x%x)\n", g_rdp_shareid));
    rdp_process_server_caps(s, len_combined_caps);
 
    rdp_send_confirm_active();
    rdp_send_synchronise();
    rdp_send_control(RDP_CTL_COOPERATE);
    rdp_send_control(RDP_CTL_REQUEST_CONTROL);
    rdp_recv(&type);    /* RDP_PDU_SYNCHRONIZE */
    rdp_recv(&type);    /* RDP_CTL_COOPERATE */
    rdp_recv(&type);    /* RDP_CTL_GRANT_CONTROL */
    rdp_send_input(0, RDP_INPUT_SYNCHRONIZE, 0,
               g_numlock_sync ? ui_get_numlock_state(read_keyboard_state()) : 0, 0);
 
    if (g_rdp_version >= RDP_V5)
    {
        rdp_enum_bmpcache2();
        rdp_send_fonts(3);
    }
    else
    {
        rdp_send_fonts(1);
        rdp_send_fonts(2);
    }
 
    rdp_recv(&type);    /* RDP_PDU_UNKNOWN 0x28 (Fonts?) */
    reset_order_state();
}
 
/* Process a colour pointer PDU */
static void
process_colour_pointer_common(STREAM s, int bpp)
{
    uint16 width, height, cache_idx, masklen, datalen;
    uint16 x, y;
    uint8 *mask;
    uint8 *data;
    RD_HCURSOR cursor;
 
    in_uint16_le(s, cache_idx);
    in_uint16_le(s, x);
    in_uint16_le(s, y);
    in_uint16_le(s, width);
    in_uint16_le(s, height);
    in_uint16_le(s, masklen);
    in_uint16_le(s, datalen);
    in_uint8p(s, data, datalen);
    in_uint8p(s, mask, masklen);
    if ((width != 32) || (height != 32))
    {
        warning("process_colour_pointer_common: " "width %d height %d\n", width, height);
    }
 
    /* keep hotspot within cursor bounding box */
    x = MIN(x, width - 1);
    y = MIN(y, height - 1);
    cursor = ui_create_cursor(x, y, width, height, mask, data, bpp);
    ui_set_cursor(cursor);
    cache_put_cursor(cache_idx, cursor);
}
 
/* Process a colour pointer PDU */
void
process_colour_pointer_pdu(STREAM s)
{
    process_colour_pointer_common(s, 24);
}
 
/* Process a New Pointer PDU - these pointers have variable bit depth */
void
process_new_pointer_pdu(STREAM s)
{
    int xor_bpp;
 
    in_uint16_le(s, xor_bpp);
    process_colour_pointer_common(s, xor_bpp);
}
 
/* Process a cached pointer PDU */
void
process_cached_pointer_pdu(STREAM s)
{
    uint16 cache_idx;
 
    in_uint16_le(s, cache_idx);
    ui_set_cursor(cache_get_cursor(cache_idx));
}
 
/* Process a system pointer PDU */
void
process_system_pointer_pdu(STREAM s)
{
    uint16 system_pointer_type;
 
    in_uint16_le(s, system_pointer_type);
    switch (system_pointer_type)
    {
        case RDP_NULL_POINTER:
            ui_set_null_cursor();
            break;
 
        default:
            unimpl("System pointer message 0x%x\n", system_pointer_type);
    }
}
 
/* Process a pointer PDU */
static void
process_pointer_pdu(STREAM s)
{
    uint16 message_type;
    uint16 x, y;
 
    in_uint16_le(s, message_type);
    in_uint8s(s, 2);    /* pad */
 
    switch (message_type)
    {
        case RDP_POINTER_MOVE:
            in_uint16_le(s, x);
            in_uint16_le(s, y);
            if (s_check(s))
                ui_move_pointer(x, y);
            break;
 
        case RDP_POINTER_COLOR:
            process_colour_pointer_pdu(s);
            break;
 
        case RDP_POINTER_CACHED:
            process_cached_pointer_pdu(s);
            break;
 
        case RDP_POINTER_SYSTEM:
            process_system_pointer_pdu(s);
            break;
 
        case RDP_POINTER_NEW:
            process_new_pointer_pdu(s);
            break;
 
        default:
            unimpl("Pointer message 0x%x\n", message_type);
    }
}
 
/* Process bitmap updates */
void
process_bitmap_updates(STREAM s)
{
    uint16 num_updates;
    uint16 left, top, right, bottom, width, height;
    uint16 cx, cy, bpp, Bpp, compress, bufsize, size;
    uint8 *data, *bmpdata;
    int i;
 
    in_uint16_le(s, num_updates);
 
    for (i = 0; i < num_updates; i++)
    {
        in_uint16_le(s, left);
        in_uint16_le(s, top);
        in_uint16_le(s, right);
        in_uint16_le(s, bottom);
        in_uint16_le(s, width);
        in_uint16_le(s, height);
        in_uint16_le(s, bpp);
        Bpp = (bpp + 7) / 8;
        in_uint16_le(s, compress);
        in_uint16_le(s, bufsize);
 
        cx = right - left + 1;
        cy = bottom - top + 1;
 
        DEBUG(("BITMAP_UPDATE(l=%d,t=%d,r=%d,b=%d,w=%d,h=%d,Bpp=%d,cmp=%d)\n",
               left, top, right, bottom, width, height, Bpp, compress));
 
        if (!compress)
        {
            int y;
            bmpdata = (uint8 *) xmalloc(width * height * Bpp);
            for (y = 0; y < height; y++)
            {
                in_uint8a(s, &bmpdata[(height - y - 1) * (width * Bpp)],
                      width * Bpp);
            }
            ui_paint_bitmap(left, top, cx, cy, width, height, bmpdata);
            xfree(bmpdata);
            continue;
        }
 
 
        if (compress & 0x400)
        {
            size = bufsize;
        }
        else
        {
            in_uint8s(s, 2);    /* pad */
            in_uint16_le(s, size);
            in_uint8s(s, 4);    /* line_size, final_size */
        }
        in_uint8p(s, data, size);
        bmpdata = (uint8 *) xmalloc(width * height * Bpp);
        if (bitmap_decompress(bmpdata, width, height, data, size, Bpp))
        {
            ui_paint_bitmap(left, top, cx, cy, width, height, bmpdata);
        }
        else
        {
            DEBUG_RDP5(("Failed to decompress data\n"));
        }
 
        xfree(bmpdata);
    }
}
 
/* Process a palette update */
void
process_palette(STREAM s)
{
    COLOURENTRY *entry;
    COLOURMAP map;
    RD_HCOLOURMAP hmap;
    int i;
 
    in_uint8s(s, 2);    /* pad */
    in_uint16_le(s, map.ncolours);
    in_uint8s(s, 2);    /* pad */
 
    map.colours = (COLOURENTRY *) xmalloc(sizeof(COLOURENTRY) * map.ncolours);
 
    DEBUG(("PALETTE(c=%d)\n", map.ncolours));
 
    for (i = 0; i < map.ncolours; i++)
    {
        entry = &map.colours[i];
        in_uint8(s, entry->red);
        in_uint8(s, entry->green);
        in_uint8(s, entry->blue);
    }
 
    hmap = ui_create_colourmap(&map);
    ui_set_colourmap(hmap);
 
    xfree(map.colours);
}
 
/* Process an update PDU */
static void
process_update_pdu(STREAM s)
{
    uint16 update_type, count;
 
    in_uint16_le(s, update_type);
 
    ui_begin_update();
    switch (update_type)
    {
        case RDP_UPDATE_ORDERS:
            in_uint8s(s, 2);    /* pad */
            in_uint16_le(s, count);
            in_uint8s(s, 2);    /* pad */
            process_orders(s, count);
            break;
 
        case RDP_UPDATE_BITMAP:
            process_bitmap_updates(s);
            break;
 
        case RDP_UPDATE_PALETTE:
            process_palette(s);
            break;
 
        case RDP_UPDATE_SYNCHRONIZE:
            break;
 
        default:
            unimpl("update %d\n", update_type);
    }
    ui_end_update();
}
 
 
/* Process a Save Session Info PDU */
void
process_pdu_logon(STREAM s)
{
    uint32 infotype;
    in_uint32_le(s, infotype);
    if (infotype == INFOTYPE_LOGON_EXTENDED_INF)
    {
        uint32 fieldspresent;
 
        in_uint8s(s, 2);    /* Length */
        in_uint32_le(s, fieldspresent);
        if (fieldspresent & LOGON_EX_AUTORECONNECTCOOKIE)
        {
            uint32 len;
            uint32 version;
 
            /* TS_LOGON_INFO_FIELD */
            in_uint8s(s, 4);    /* cbFieldData */
 
            /* ARC_SC_PRIVATE_PACKET */
            in_uint32_le(s, len);
            if (len != 28)
            {
                warning("Invalid length in Auto-Reconnect packet\n");
                return;
            }
 
            in_uint32_le(s, version);
            if (version != 1)
            {
                warning("Unsupported version of Auto-Reconnect packet\n");
                return;
            }
 
            in_uint32_le(s, g_reconnect_logonid);
            in_uint8a(s, g_reconnect_random, 16);
            g_has_reconnect_random = True;
            g_reconnect_random_ts = time(NULL);
            DEBUG(("Saving auto-reconnect cookie, id=%u\n", g_reconnect_logonid));
        }
    }
}
 
 
/* Process a disconnect PDU */
void
process_disconnect_pdu(STREAM s, uint32 * ext_disc_reason)
{
    in_uint32_le(s, *ext_disc_reason);
 
    DEBUG(("Received disconnect PDU\n"));
}
 
/* Process data PDU */
static RD_BOOL
process_data_pdu(STREAM s, uint32 * ext_disc_reason)
{
    uint8 data_pdu_type;
    uint8 ctype;
    uint16 clen;
    uint32 len;
 
    uint32 roff, rlen;
 
    struct stream *ns = &(g_mppc_dict.ns);
 
    in_uint8s(s, 6);    /* shareid, pad, streamid */
    in_uint16_le(s, len);
    in_uint8(s, data_pdu_type);
    in_uint8(s, ctype);
    in_uint16_le(s, clen);
    clen -= 18;
 
    if (ctype & RDP_MPPC_COMPRESSED)
    {
        if (len > RDP_MPPC_DICT_SIZE)
            error("error decompressed packet size exceeds max\n");
        if (mppc_expand(s->p, clen, ctype, &roff, &rlen) == -1)
            error("error while decompressing packet\n");
 
        /* len -= 18; */
 
        /* allocate memory and copy the uncompressed data into the temporary stream */
        ns->data = (uint8 *) xrealloc(ns->data, rlen);
 
        memcpy((ns->data), (unsigned char *) (g_mppc_dict.hist + roff), rlen);
 
        ns->size = rlen;
        ns->end = (ns->data + ns->size);
        ns->p = ns->data;
        ns->rdp_hdr = ns->p;
 
        s = ns;
    }
 
    switch (data_pdu_type)
    {
        case RDP_DATA_PDU_UPDATE:
            process_update_pdu(s);
            break;
 
        case RDP_DATA_PDU_CONTROL:
            DEBUG(("Received Control PDU\n"));
            break;
 
        case RDP_DATA_PDU_SYNCHRONISE:
            DEBUG(("Received Sync PDU\n"));
            break;
 
        case RDP_DATA_PDU_POINTER:
            process_pointer_pdu(s);
            break;
 
        case RDP_DATA_PDU_BELL:
            ui_bell();
            break;
 
        case RDP_DATA_PDU_LOGON:
            DEBUG(("Received Logon PDU\n"));
            /* User logged on */
            process_pdu_logon(s);
            break;
 
        case RDP_DATA_PDU_DISCONNECT:
            process_disconnect_pdu(s, ext_disc_reason);
 
            /* We used to return true and disconnect immediately here, but
             * Windows Vista sends a disconnect PDU with reason 0 when
             * reconnecting to a disconnected session, and MSTSC doesn't
             * drop the connection.  I think we should just save the status.
             */
            break;
 
        case RDP_DATA_PDU_AUTORECONNECT_STATUS:
            warning("Automatic reconnect using cookie, failed.\n");
            break;
 
        default:
            unimpl("data PDU %d\n", data_pdu_type);
    }
    return False;
}
 
/* Process redirect PDU from Session Directory */
static RD_BOOL
process_redirect_pdu(STREAM s, RD_BOOL enhanced_redirect /*, uint32 * ext_disc_reason */ )
{
    uint32 len;
    uint16 redirect_identifier;
 
    /* reset any previous redirection information */
    g_redirect = True;
    free(g_redirect_server);
    free(g_redirect_username);
    free(g_redirect_domain);
    free(g_redirect_lb_info);
    free(g_redirect_cookie);
 
    g_redirect_server = NULL;
    g_redirect_username = NULL;
    g_redirect_domain = NULL;
    g_redirect_lb_info = NULL;
    g_redirect_cookie = NULL;
 
    /* these 2 bytes are unknown, seem to be zeros */
    in_uint8s(s, 2);
 
    /* FIXME: Previous implementation only reads 4 bytes which has been working
       but todays spec says something different. Investigate and retest
       server redirection using WTS 2003 cluster.
     */
 
    if (enhanced_redirect)
    {
        /* read identifier */
        in_uint16_le(s, redirect_identifier);
        if (redirect_identifier != 0x0400)
            error("Protocol error in server redirection, unexpected data.");
 
        /* FIXME: skip total length */
        in_uint8s(s, 2);
 
        /* read session_id */
        in_uint32_le(s, g_redirect_session_id);
    }
 
    /* read connection flags */
    in_uint32_le(s, g_redirect_flags);
 
    if (g_redirect_flags & LB_TARGET_NET_ADDRESS)
    {
        /* read length of ip string */
        in_uint32_le(s, len);
 
        /* read ip string */
        rdp_in_unistr(s, len, &g_redirect_server, &g_redirect_server_len);
    }
 
    if (g_redirect_flags & LB_LOAD_BALANCE_INFO)
    {
        /* read length of load balance info blob */
        in_uint32_le(s, g_redirect_lb_info_len);
 
        /* reallocate a loadbalance info blob */
        if (g_redirect_lb_info != NULL)
            free(g_redirect_lb_info);
 
        g_redirect_lb_info = xmalloc(g_redirect_lb_info_len);
 
        /* read load balance info blob */
        in_uint8p(s, g_redirect_lb_info, g_redirect_lb_info_len);
    }
 
    if (g_redirect_flags & LB_USERNAME)
    {
        /* read length of username string */
        in_uint32_le(s, len);
 
        /* read username string */
        rdp_in_unistr(s, len, &g_redirect_username, &g_redirect_username_len);
    }
 
    if (g_redirect_flags & LB_DOMAIN)
    {
        /* read length of domain string */
        in_uint32_le(s, len);
 
        /* read domain string */
        rdp_in_unistr(s, len, &g_redirect_domain, &g_redirect_domain_len);
    }
 
    if (g_redirect_flags & LB_PASSWORD)
    {
        /* the information in this blob is either a password or a cookie that
           should be passed though as blob and not parsed as a unicode string */
 
        /* read blob length */
        in_uint32_le(s, g_redirect_cookie_len);
 
        /* reallocate cookie blob */
        if (g_redirect_cookie != NULL)
            free(g_redirect_cookie);
 
        g_redirect_cookie = xmalloc(g_redirect_cookie_len);
 
        /* read cookie as is */
        in_uint8p(s, g_redirect_cookie, g_redirect_cookie_len);
    }
 
    if (g_redirect_flags & LB_DONTSTOREUSERNAME)
    {
        warning("LB_DONTSTOREUSERNAME set\n");
    }
 
    if (g_redirect_flags & LB_SMARTCARD_LOGON)
    {
        warning("LB_SMARTCARD_LOGON set\n");
    }
 
    if (g_redirect_flags & LB_NOREDIRECT)
    {
        /* By spec this is only for information and doesn't mean that an actual
           redirect should be performed. How it should be used is not mentioned. */
        g_redirect = False;
    }
 
    if (g_redirect_flags & LB_TARGET_FQDN)
    {
        in_uint32_le(s, len);
 
        /* Let target fqdn replace target ip address */
        if (g_redirect_server)
        {
            free(g_redirect_server);
            g_redirect_server = NULL;
        }
 
        /* read fqdn string */
        rdp_in_unistr(s, len, &g_redirect_server, &g_redirect_server_len);
    }
 
    if (g_redirect_flags & LB_TARGET_NETBIOS)
    {
        warning("LB_TARGET_NETBIOS set\n");
    }
 
    if (g_redirect_flags & LB_TARGET_NET_ADDRESSES)
    {
        warning("LB_TARGET_NET_ADDRESSES set\n");
    }
 
    if (g_redirect_flags & LB_CLIENT_TSV_URL)
    {
        warning("LB_CLIENT_TSV_URL set\n");
    }
 
    if (g_redirect_flags & LB_SERVER_TSV_CAPABLE)
    {
        warning("LB_SERVER_TSV_CAPABLE set\n");
    }
 
    if (g_redirect_flags & LB_PASSWORD_IS_PK_ENCRYPTED)
    {
        warning("LB_PASSWORD_IS_PK_ENCRYPTED set\n");
    }
 
    if (g_redirect_flags & LB_REDIRECTION_GUID)
    {
        warning("LB_REDIRECTION_GUID set\n");
    }
 
    if (g_redirect_flags & LB_TARGET_CERTIFICATE)
    {
        warning("LB_TARGET_CERTIFICATE set\n");
    }
 
    return True;
}
 
/* Process incoming packets */
void
rdp_main_loop(RD_BOOL * deactivated, uint32 * ext_disc_reason)
{
    while (rdp_loop(deactivated, ext_disc_reason))
    {
        if (g_pending_resize || g_redirect)
        {
            return;
        }
    }
}
 
/* used in uiports and rdp_main_loop, processes the rdp packets waiting */
RD_BOOL
rdp_loop(RD_BOOL * deactivated, uint32 * ext_disc_reason)
{
    uint8 type;
    RD_BOOL cont = True;
    STREAM s;
 
    while (cont)
    {
        s = rdp_recv(&type);
        if (s == NULL)
            return False;
        switch (type)
        {
            case RDP_PDU_DEMAND_ACTIVE:
                process_demand_active(s);
                *deactivated = False;
                break;
            case RDP_PDU_DEACTIVATE:
                DEBUG(("RDP_PDU_DEACTIVATE\n"));
                *deactivated = True;
                break;
            case RDP_PDU_REDIRECT:
                return process_redirect_pdu(s, False);
                break;
            case RDP_PDU_ENHANCED_REDIRECT:
                return process_redirect_pdu(s, True);
                break;
            case RDP_PDU_DATA:
                /* If we got a data PDU, we don't need to keep the password in memory
                   anymore and therefor we should clear it for security reasons. */
                if (g_password[0] != '\0')
                    memset(g_password, 0, sizeof(g_password));
 
                process_data_pdu(s, ext_disc_reason);
                break;
            case 0:
                break;
            default:
                unimpl("PDU %d\n", type);
        }
        cont = g_next_packet < s->end;
    }
    return True;
}
 
/* Establish a connection up to the RDP layer */
RD_BOOL
rdp_connect(char *server, uint32 flags, char *domain, char *password,
        char *command, char *directory, RD_BOOL reconnect)
{
    RD_BOOL deactivated = False;
    uint32 ext_disc_reason = 0;
 
    if (!sec_connect(server, g_username, domain, password, reconnect))
        return False;
 
    rdp_send_logon_info(flags, domain, g_username, password, command, directory);
 
    /* run RDP loop until first licence demand active PDU */
    while (!g_rdp_shareid)
    {
        if (g_network_error)
            return False;
 
        if (!rdp_loop(&deactivated, &ext_disc_reason))
            return False;
 
        if (g_redirect)
            return True;
    }
    return True;
}
 
/* Called during redirection to reset the state to support redirection */
void
rdp_reset_state(void)
{
    g_next_packet = NULL;   /* reset the packet information */
    g_rdp_shareid = 0;
    sec_reset_state();
}
 
/* Disconnect from the RDP layer */
void
rdp_disconnect(void)
{
    sec_disconnect();
}