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xrdp/libxrdp/xrdp_rdp.c
matt335672 6f881d47d3 Rationalise ms- constants 
Constants from MS documents (MS-RDPBCGR etc) moved out of
common/xrdp_constants.h into includes named after the documents.

Similar includes moved from sesman/chansrv to the common area.
2020-01-06 15:46:37 +00:00

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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2014
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* rdp layer
*/
#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif
#include "libxrdp.h"
#include "ms-rdpbcgr.h"
#include "log.h"
#include "ssl_calls.h"
#if defined(XRDP_NEUTRINORDP)
#include <freerdp/codec/rfx.h>
#include <freerdp/constants.h>
#endif
#define LOG_LEVEL 1
#define LLOG(_level, _args) \
do { if (_level < LOG_LEVEL) { g_write _args ; } } while (0)
#define LLOGLN(_level, _args) \
do { if (_level < LOG_LEVEL) { g_writeln _args ; } } while (0)
#define FASTPATH_FRAG_SIZE (16 * 1024 - 128)
/*****************************************************************************/
static int
xrdp_rdp_read_config(struct xrdp_client_info *client_info)
{
int index = 0;
struct list *items = (struct list *)NULL;
struct list *values = (struct list *)NULL;
char *item = NULL;
char *value = NULL;
char cfg_file[256];
int pos;
char *tmp = NULL;
int tmp_length = 0;
/* initialize (zero out) local variables: */
g_memset(cfg_file, 0, sizeof(char) * 256);
items = list_create();
items->auto_free = 1;
values = list_create();
values->auto_free = 1;
g_snprintf(cfg_file, 255, "%s/xrdp.ini", XRDP_CFG_PATH);
DEBUG(("cfg_file %s", cfg_file));
file_by_name_read_section(cfg_file, "globals", items, values);
for (index = 0; index < items->count; index++)
{
item = (char *)list_get_item(items, index);
value = (char *)list_get_item(values, index);
DEBUG(("item %s value %s", item, value));
if (g_strcasecmp(item, "bitmap_cache") == 0)
{
client_info->use_bitmap_cache = g_text2bool(value);
}
else if (g_strcasecmp(item, "bitmap_compression") == 0)
{
client_info->use_bitmap_comp = g_text2bool(value);
}
else if (g_strcasecmp(item, "bulk_compression") == 0)
{
client_info->use_bulk_comp = g_text2bool(value);
}
else if (g_strcasecmp(item, "crypt_level") == 0)
{
if (g_strcasecmp(value, "none") == 0)
{
client_info->crypt_level = 0;
}
else if (g_strcasecmp(value, "low") == 0)
{
client_info->crypt_level = 1;
}
else if (g_strcasecmp(value, "medium") == 0)
{
client_info->crypt_level = 2;
}
else if (g_strcasecmp(value, "high") == 0)
{
client_info->crypt_level = 3;
}
else if (g_strcasecmp(value, "fips") == 0)
{
client_info->crypt_level = 4;
}
else
{
log_message(LOG_LEVEL_ALWAYS,"Warning: Your configured crypt level is "
"undefined, 'high' will be used");
client_info->crypt_level = 3;
}
}
else if (g_strcasecmp(item, "allow_channels") == 0)
{
client_info->channels_allowed = g_text2bool(value);
if (client_info->channels_allowed == 0)
{
log_message(LOG_LEVEL_DEBUG,"Info - All channels are disabled");
}
}
else if (g_strcasecmp(item, "allow_multimon") == 0)
{
client_info->multimon = g_text2bool(value);
if (client_info->multimon == 0)
{
log_message(LOG_LEVEL_DEBUG,"Info - Multi monitor server support disabled");
}
}
else if (g_strcasecmp(item, "max_bpp") == 0)
{
client_info->max_bpp = g_atoi(value);
}
else if (g_strcasecmp(item, "rfx_min_pixel") == 0)
{
client_info->rfx_min_pixel = g_atoi(value);
}
else if (g_strcasecmp(item, "new_cursors") == 0)
{
client_info->pointer_flags = g_text2bool(value) == 0 ? 2 : 0;
}
else if (g_strcasecmp(item, "require_credentials") == 0)
{
client_info->require_credentials = g_text2bool(value);
}
else if (g_strcasecmp(item, "use_fastpath") == 0)
{
if (g_strcasecmp(value, "output") == 0)
{
client_info->use_fast_path = 1;
}
else if (g_strcasecmp(value, "input") == 0)
{
client_info->use_fast_path = 2;
}
else if (g_strcasecmp(value, "both") == 0)
{
client_info->use_fast_path = 3;
}
else if (g_strcasecmp(value, "none") == 0)
{
client_info->use_fast_path = 0;
}
else
{
log_message(LOG_LEVEL_ALWAYS,"Warning: Your configured fastpath level is "
"undefined, fastpath will not be used");
client_info->use_fast_path = 0;
}
}
else if (g_strcasecmp(item, "ssl_protocols") == 0)
{
/* put leading/trailing comma to properly detect "TLSv1" without regex */
tmp_length = g_strlen(value) + 3;
tmp = g_new(char, tmp_length);
g_snprintf(tmp, tmp_length, "%s%s%s", ",", value, ",");
/* replace all spaces with comma */
/* to accept space after comma */
while ((pos = g_pos(tmp, " ")) != -1)
{
tmp[pos] = ',';
}
ssl_get_protocols_from_string(tmp, &(client_info->ssl_protocols));
g_free(tmp);
}
else if (g_strcasecmp(item, "tls_ciphers") == 0)
{
client_info->tls_ciphers = g_strdup(value);
}
else if (g_strcasecmp(item, "security_layer") == 0)
{
if (g_strcasecmp(value, "rdp") == 0)
{
client_info->security_layer = PROTOCOL_RDP;
}
else if (g_strcasecmp(value, "tls") == 0)
{
client_info->security_layer = PROTOCOL_SSL;
}
else if (g_strcasecmp(value, "hybrid") == 0)
{
client_info->security_layer = PROTOCOL_SSL | PROTOCOL_HYBRID;
}
else if (g_strcasecmp(value, "negotiate") == 0)
{
client_info->security_layer = PROTOCOL_SSL | PROTOCOL_HYBRID | PROTOCOL_HYBRID_EX;
}
else
{
log_message(LOG_LEVEL_ERROR, "security_layer=%s is not "
"recognized, will use security_layer=negotiate",
value);
client_info->security_layer = PROTOCOL_SSL | PROTOCOL_HYBRID | PROTOCOL_HYBRID_EX;
}
}
else if (g_strcasecmp(item, "certificate") == 0)
{
g_memset(client_info->certificate, 0, sizeof(char) * 1024);
if (g_strlen(value) == 0)
{
/* default certificate path */
g_snprintf(client_info->certificate, 1023, "%s/cert.pem", XRDP_CFG_PATH);
log_message(LOG_LEVEL_INFO,
"Using default X.509 certificate: %s",
client_info->certificate);
}
else if (value[0] != '/')
{
/* default certificate path */
g_snprintf(client_info->certificate, 1023, "%s/cert.pem", XRDP_CFG_PATH);
log_message(LOG_LEVEL_WARNING,
"X.509 certificate should use absolute path, using "
"default instead: %s", client_info->certificate);
}
else
{
/* use user defined certificate */
g_strncpy(client_info->certificate, value, 1023);
}
if (!g_file_readable(client_info->certificate))
{
log_message(LOG_LEVEL_ERROR, "Cannot read certificate file %s: %s",
client_info->certificate, g_get_strerror());
}
}
else if (g_strcasecmp(item, "key_file") == 0)
{
g_memset(client_info->key_file, 0, sizeof(char) * 1024);
if (g_strlen(value) == 0)
{
/* default key_file path */
g_snprintf(client_info->key_file, 1023, "%s/key.pem", XRDP_CFG_PATH);
log_message(LOG_LEVEL_INFO, "Using default X.509 key file: %s",
client_info->key_file);
}
else if (value[0] != '/')
{
/* default key_file path */
g_snprintf(client_info->key_file, 1023, "%s/key.pem", XRDP_CFG_PATH);
log_message(LOG_LEVEL_WARNING,
"X.509 key file should use absolute path, using "
"default instead: %s", client_info->key_file);
}
else
{
/* use user defined key_file */
g_strncpy(client_info->key_file, value, 1023);
}
if (!g_file_readable(client_info->key_file))
{
log_message(LOG_LEVEL_ERROR, "Cannot read private key file %s: %s",
client_info->key_file, g_get_strerror());
}
}
}
list_delete(items);
list_delete(values);
return 0;
}
#if defined(XRDP_NEUTRINORDP)
/*****************************************************************************/
static void
cpuid(tui32 info, tui32 *eax, tui32 *ebx, tui32 *ecx, tui32 *edx)
{
#ifdef __GNUC__
#if defined(__i386__) || defined(__x86_64__)
__asm volatile
(
/* The EBX (or RBX register on x86_64) is used for the PIC base address
and must not be corrupted by our inline assembly. */
#if defined(__i386__)
"mov %%ebx, %%esi;"
"cpuid;"
"xchg %%ebx, %%esi;"
#else
"mov %%rbx, %%rsi;"
"cpuid;"
"xchg %%rbx, %%rsi;"
#endif
: "=a" (*eax), "=S" (*ebx), "=c" (*ecx), "=d" (*edx)
: "0" (info)
);
#endif
#endif
}
/*****************************************************************************/
static tui32
xrdp_rdp_detect_cpu(void)
{
tui32 eax;
tui32 ebx;
tui32 ecx;
tui32 edx;
tui32 cpu_opt;
eax = 0;
ebx = 0;
ecx = 0;
edx = 0;
cpu_opt = 0;
cpuid(1, &eax, &ebx, &ecx, &edx);
if (edx & (1 << 26))
{
DEBUG(("SSE2 detected"));
cpu_opt |= CPU_SSE2;
}
return cpu_opt;
}
#endif
/*****************************************************************************/
struct xrdp_rdp *
xrdp_rdp_create(struct xrdp_session *session, struct trans *trans)
{
struct xrdp_rdp *self = (struct xrdp_rdp *)NULL;
int bytes;
DEBUG(("in xrdp_rdp_create"));
self = (struct xrdp_rdp *)g_malloc(sizeof(struct xrdp_rdp), 1);
self->session = session;
self->share_id = 66538;
/* read ini settings */
xrdp_rdp_read_config(&self->client_info);
/* create sec layer */
self->sec_layer = xrdp_sec_create(self, trans);
/* default 8 bit v1 color bitmap cache entries and size */
self->client_info.cache1_entries = 600;
self->client_info.cache1_size = 256;
self->client_info.cache2_entries = 300;
self->client_info.cache2_size = 1024;
self->client_info.cache3_entries = 262;
self->client_info.cache3_size = 4096;
/* load client ip info */
bytes = sizeof(self->client_info.client_ip) - 1;
g_write_ip_address(trans->sck, self->client_info.client_ip, bytes);
self->mppc_enc = mppc_enc_new(PROTO_RDP_50);
#if defined(XRDP_NEUTRINORDP)
self->rfx_enc = rfx_context_new();
rfx_context_set_cpu_opt(self->rfx_enc, xrdp_rdp_detect_cpu());
#endif
self->client_info.size = sizeof(self->client_info);
DEBUG(("out xrdp_rdp_create"));
return self;
}
/*****************************************************************************/
void
xrdp_rdp_delete(struct xrdp_rdp *self)
{
if (self == 0)
{
return;
}
xrdp_sec_delete(self->sec_layer);
mppc_enc_free(self->mppc_enc);
#if defined(XRDP_NEUTRINORDP)
rfx_context_free((RFX_CONTEXT *)(self->rfx_enc));
#endif
g_free(self->client_info.tls_ciphers);
g_free(self);
}
/*****************************************************************************/
int
xrdp_rdp_init(struct xrdp_rdp *self, struct stream *s)
{
if (xrdp_sec_init(self->sec_layer, s) != 0)
{
return 1;
}
s_push_layer(s, rdp_hdr, 6);
return 0;
}
/*****************************************************************************/
int
xrdp_rdp_init_data(struct xrdp_rdp *self, struct stream *s)
{
if (xrdp_sec_init(self->sec_layer, s) != 0)
{
return 1;
}
s_push_layer(s, rdp_hdr, 18);
return 0;
}
/*****************************************************************************/
/* returns error */
int
xrdp_rdp_recv(struct xrdp_rdp *self, struct stream *s, int *code)
{
int error = 0;
int len = 0;
int pdu_code = 0;
int chan = 0;
const tui8 *header;
DEBUG(("in xrdp_rdp_recv"));
if (s->next_packet == 0 || s->next_packet >= s->end)
{
/* check for fastpath first */
header = (const tui8 *) (s->p);
if (header[0] != 0x3)
{
if (xrdp_sec_recv_fastpath(self->sec_layer, s) != 0)
{
return 1;
}
/* next_packet gets set in xrdp_sec_recv_fastpath */
*code = 2; // special code for fastpath input
DEBUG(("out (fastpath) xrdp_rdp_recv"));
return 0;
}
/* not fastpath, do tpkt */
chan = 0;
error = xrdp_sec_recv(self->sec_layer, s, &chan);
if (error == -1) /* special code for send demand active */
{
s->next_packet = 0;
*code = -1;
DEBUG(("out (1) xrdp_rdp_recv"));
return 0;
}
if (error != 0)
{
DEBUG(("out xrdp_rdp_recv error"));
g_writeln("xrdp_rdp_recv: xrdp_sec_recv failed");
return 1;
}
if ((chan != MCS_GLOBAL_CHANNEL) && (chan > 0))
{
if (chan > MCS_GLOBAL_CHANNEL)
{
if (xrdp_channel_process(self->sec_layer->chan_layer, s, chan) != 0)
{
g_writeln("xrdp_channel_process returned unhandled error") ;
}
}
else
{
if (chan != 1)
{
g_writeln("Wrong channel Id to be handled by xrdp_channel_process %d", chan);
}
}
s->next_packet = 0;
*code = 0;
DEBUG(("out (2) xrdp_rdp_recv"));
return 0;
}
s->next_packet = s->p;
}
else
{
DEBUG(("xrdp_rdp_recv stream not touched"))
s->p = s->next_packet;
}
if (!s_check_rem(s, 6))
{
s->next_packet = 0;
*code = 0;
DEBUG(("out (3) xrdp_rdp_recv"));
len = (int)(s->end - s->p);
g_writeln("xrdp_rdp_recv: bad RDP packet, length [%d]", len);
return 0;
}
else
{
in_uint16_le(s, len);
/*g_writeln("New len received : %d next packet: %d s_end: %d",len,s->next_packet,s->end); */
in_uint16_le(s, pdu_code);
*code = pdu_code & 0xf;
in_uint8s(s, 2); /* mcs user id */
s->next_packet += len;
DEBUG(("out (4) xrdp_rdp_recv"));
return 0;
}
}
/*****************************************************************************/
int
xrdp_rdp_send(struct xrdp_rdp *self, struct stream *s, int pdu_type)
{
int len = 0;
DEBUG(("in xrdp_rdp_send"));
s_pop_layer(s, rdp_hdr);
len = s->end - s->p;
out_uint16_le(s, len);
out_uint16_le(s, 0x10 | pdu_type);
out_uint16_le(s, self->mcs_channel);
if (xrdp_sec_send(self->sec_layer, s, MCS_GLOBAL_CHANNEL) != 0)
{
DEBUG(("out xrdp_rdp_send error"));
return 1;
}
DEBUG(("out xrdp_rdp_send"));
return 0;
}
/*****************************************************************************/
int
xrdp_rdp_send_data(struct xrdp_rdp *self, struct stream *s,
int data_pdu_type)
{
int len;
int ctype;
int clen;
int dlen;
int pdulen;
int pdutype;
int tocomplen;
int iso_offset;
int mcs_offset;
int sec_offset;
int rdp_offset;
struct stream ls;
struct xrdp_mppc_enc *mppc_enc;
DEBUG(("in xrdp_rdp_send_data"));
s_pop_layer(s, rdp_hdr);
len = (int)(s->end - s->p);
pdutype = 0x10 | PDUTYPE_DATAPDU;
pdulen = len;
dlen = len;
ctype = 0;
clen = len;
tocomplen = pdulen - 18;
if (self->client_info.rdp_compression && self->session->up_and_running)
{
mppc_enc = self->mppc_enc;
if (compress_rdp(mppc_enc, (tui8 *)(s->p + 18), tocomplen))
{
DEBUG(("mppc_encode ok flags 0x%x bytes_in_opb %d historyOffset %d "
"tocomplen %d", mppc_enc->flags, mppc_enc->bytes_in_opb,
mppc_enc->historyOffset, tocomplen));
clen = mppc_enc->bytes_in_opb + 18;
pdulen = clen;
ctype = mppc_enc->flags;
iso_offset = (int)(s->iso_hdr - s->data);
mcs_offset = (int)(s->mcs_hdr - s->data);
sec_offset = (int)(s->sec_hdr - s->data);
rdp_offset = (int)(s->rdp_hdr - s->data);
/* outputBuffer has 64 bytes preceding it */
ls.data = mppc_enc->outputBuffer - (rdp_offset + 18);
ls.p = ls.data + rdp_offset;
ls.end = ls.p + clen;
ls.size = clen;
ls.iso_hdr = ls.data + iso_offset;
ls.mcs_hdr = ls.data + mcs_offset;
ls.sec_hdr = ls.data + sec_offset;
ls.rdp_hdr = ls.data + rdp_offset;
ls.channel_hdr = 0;
ls.next_packet = 0;
s = &ls;
}
else
{
LLOGLN(10, ("xrdp_rdp_send_data: mppc_encode not ok "
"type %d flags %d", mppc_enc->protocol_type,
mppc_enc->flags));
}
}
out_uint16_le(s, pdulen);
out_uint16_le(s, pdutype);
out_uint16_le(s, self->mcs_channel);
out_uint32_le(s, self->share_id);
out_uint8(s, 0);
out_uint8(s, 1);
out_uint16_le(s, dlen);
out_uint8(s, data_pdu_type);
out_uint8(s, ctype);
out_uint16_le(s, clen);
if (xrdp_sec_send(self->sec_layer, s, MCS_GLOBAL_CHANNEL) != 0)
{
DEBUG(("out xrdp_rdp_send_data error"));
return 1;
}
DEBUG(("out xrdp_rdp_send_data"));
return 0;
}
/*****************************************************************************/
/* returns the fastpath rdp byte count */
int
xrdp_rdp_get_fastpath_bytes(struct xrdp_rdp *self)
{
if (self->client_info.rdp_compression)
{
return 4;
}
return 3;
}
/*****************************************************************************/
int
xrdp_rdp_init_fastpath(struct xrdp_rdp *self, struct stream *s)
{
if (xrdp_sec_init_fastpath(self->sec_layer, s) != 0)
{
return 1;
}
if (self->client_info.rdp_compression)
{
s_push_layer(s, rdp_hdr, 4);
}
else
{
s_push_layer(s, rdp_hdr, 3);
}
return 0;
}
/*****************************************************************************/
/* returns error */
/* 2.2.9.1.2.1 Fast-Path Update (TS_FP_UPDATE)
* http://msdn.microsoft.com/en-us/library/cc240622.aspx */
int
xrdp_rdp_send_fastpath(struct xrdp_rdp *self, struct stream *s,
int data_pdu_type)
{
int updateHeader;
int updateCode;
int fragmentation;
int compression;
int comp_type;
int comp_len;
int no_comp_len;
int send_len;
int cont;
int header_bytes;
int sec_bytes;
int to_comp_len;
int sec_offset;
int rdp_offset;
struct stream frag_s;
struct stream comp_s;
struct stream send_s;
struct xrdp_mppc_enc *mppc_enc;
LLOGLN(10, ("xrdp_rdp_send_fastpath:"));
s_pop_layer(s, rdp_hdr);
updateCode = data_pdu_type;
if (self->client_info.rdp_compression)
{
compression = 2;
header_bytes = 4;
}
else
{
compression = 0;
header_bytes = 3;
}
sec_bytes = xrdp_sec_get_fastpath_bytes(self->sec_layer);
fragmentation = 0;
frag_s = *s;
sec_offset = (int)(frag_s.sec_hdr - frag_s.data);
rdp_offset = (int)(frag_s.rdp_hdr - frag_s.data);
cont = 1;
while (cont)
{
comp_type = 0;
send_s = frag_s;
no_comp_len = (int)(frag_s.end - frag_s.p);
if (no_comp_len > FASTPATH_FRAG_SIZE)
{
no_comp_len = FASTPATH_FRAG_SIZE;
if (fragmentation == 0)
{
fragmentation = 2; /* FASTPATH_FRAGMENT_FIRST */
}
else if (fragmentation == 2)
{
fragmentation = 3; /* FASTPATH_FRAGMENT_NEXT */
}
}
else
{
if (fragmentation != 0)
{
fragmentation = 1; /* FASTPATH_FRAGMENT_LAST */
}
}
send_len = no_comp_len;
LLOGLN(10, ("xrdp_rdp_send_fastpath: no_comp_len %d fragmentation %d",
no_comp_len, fragmentation));
if ((compression != 0) && (no_comp_len > header_bytes + 16))
{
to_comp_len = no_comp_len - header_bytes;
mppc_enc = self->mppc_enc;
if (compress_rdp(mppc_enc, (tui8 *)(frag_s.p + header_bytes),
to_comp_len))
{
comp_len = mppc_enc->bytes_in_opb + header_bytes;
LLOGLN(10, ("xrdp_rdp_send_fastpath: no_comp_len %d "
"comp_len %d", no_comp_len, comp_len));
send_len = comp_len;
comp_type = mppc_enc->flags;
/* outputBuffer has 64 bytes preceding it */
g_memset(&comp_s, 0, sizeof(comp_s));
comp_s.data = mppc_enc->outputBuffer -
(rdp_offset + header_bytes);
comp_s.p = comp_s.data + rdp_offset;
comp_s.end = comp_s.p + send_len;
comp_s.size = send_len;
comp_s.sec_hdr = comp_s.data + sec_offset;
comp_s.rdp_hdr = comp_s.data + rdp_offset;
send_s = comp_s;
}
else
{
LLOGLN(10, ("xrdp_rdp_send_fastpath: mppc_encode not ok "
"type %d flags %d", mppc_enc->protocol_type,
mppc_enc->flags));
}
}
updateHeader = (updateCode & 15) |
((fragmentation & 3) << 4) |
((compression & 3) << 6);
out_uint8(&send_s, updateHeader);
if (compression != 0)
{
out_uint8(&send_s, comp_type);
}
send_len -= header_bytes;
out_uint16_le(&send_s, send_len);
send_s.end = send_s.p + send_len;
if (xrdp_sec_send_fastpath(self->sec_layer, &send_s) != 0)
{
LLOGLN(0, ("xrdp_rdp_send_fastpath: xrdp_fastpath_send failed"));
return 1;
}
frag_s.p += no_comp_len;
cont = frag_s.p < frag_s.end;
frag_s.p -= header_bytes;
frag_s.sec_hdr = frag_s.p - sec_bytes;
frag_s.data = frag_s.sec_hdr;
}
return 0;
}
/*****************************************************************************/
int
xrdp_rdp_send_data_update_sync(struct xrdp_rdp *self)
{
struct stream *s = (struct stream *)NULL;
make_stream(s);
init_stream(s, 8192);
DEBUG(("in xrdp_rdp_send_data_update_sync"));
if (self->client_info.use_fast_path & 1) /* fastpath output supported */
{
LLOGLN(10, ("xrdp_rdp_send_data_update_sync: fastpath"));
if (xrdp_rdp_init_fastpath(self, s) != 0)
{
free_stream(s);
return 1;
}
}
else /* slowpath */
{
if (xrdp_rdp_init_data(self, s) != 0)
{
DEBUG(("out xrdp_rdp_send_data_update_sync error"));
free_stream(s);
return 1;
}
out_uint16_le(s, RDP_UPDATE_SYNCHRONIZE);
out_uint16_le(s, 0); /* pad */
}
s_mark_end(s);
if (self->client_info.use_fast_path & 1) /* fastpath output supported */
{
if (xrdp_rdp_send_fastpath(self, s,
FASTPATH_UPDATETYPE_SYNCHRONIZE) != 0)
{
free_stream(s);
return 1;
}
}
else /* slowpath */
{
if (xrdp_rdp_send_data(self, s, RDP_DATA_PDU_UPDATE) != 0)
{
DEBUG(("out xrdp_rdp_send_data_update_sync error"));
free_stream(s);
return 1;
}
}
DEBUG(("out xrdp_rdp_send_data_update_sync"));
free_stream(s);
return 0;
}
/*****************************************************************************/
int
xrdp_rdp_incoming(struct xrdp_rdp *self)
{
struct xrdp_iso *iso;
iso = self->sec_layer->mcs_layer->iso_layer;
DEBUG(("in xrdp_rdp_incoming"));
if (xrdp_sec_incoming(self->sec_layer) != 0)
{
return 1;
}
self->mcs_channel = self->sec_layer->mcs_layer->userid +
MCS_USERCHANNEL_BASE;
DEBUG(("out xrdp_rdp_incoming mcs channel %d", self->mcs_channel));
g_strncpy(self->client_info.client_addr, iso->trans->addr,
sizeof(self->client_info.client_addr) - 1);
g_strncpy(self->client_info.client_port, iso->trans->port,
sizeof(self->client_info.client_port) - 1);
/* log TLS version and cipher of TLS connections */
if (iso->selectedProtocol > PROTOCOL_RDP)
{
log_message(LOG_LEVEL_INFO,
"TLS connection established from %s port %s: %s with cipher %s",
self->client_info.client_addr,
self->client_info.client_port,
iso->trans->ssl_protocol,
iso->trans->cipher_name);
}
/* log non-TLS connections */
else
{
log_message(LOG_LEVEL_INFO,
"Non-TLS connection established from %s port %s: "
"encrypted with standard RDP security",
self->client_info.client_addr,
self->client_info.client_port);
}
return 0;
}
/*****************************************************************************/
static int
xrdp_rdp_process_data_pointer(struct xrdp_rdp *self, struct stream *s)
{
return 0;
}
/*****************************************************************************/
/* RDP_DATA_PDU_INPUT */
static int
xrdp_rdp_process_data_input(struct xrdp_rdp *self, struct stream *s)
{
int num_events;
int index;
int msg_type;
int device_flags;
int param1;
int param2;
int time;
if (!s_check_rem(s, 4))
{
return 1;
}
in_uint16_le(s, num_events);
in_uint8s(s, 2); /* pad */
DEBUG(("in xrdp_rdp_process_data_input %d events", num_events));
for (index = 0; index < num_events; index++)
{
if (!s_check_rem(s, 12))
{
return 1;
}
in_uint32_le(s, time);
in_uint16_le(s, msg_type);
in_uint16_le(s, device_flags);
in_sint16_le(s, param1);
in_sint16_le(s, param2);
DEBUG(("xrdp_rdp_process_data_input event %4.4x flags %4.4x param1 %d "
"param2 %d time %d", msg_type, device_flags, param1, param2, time));
if (self->session->callback != 0)
{
/* msg_type can be
RDP_INPUT_SYNCHRONIZE - 0
RDP_INPUT_SCANCODE - 4
RDP_INPUT_MOUSE - 0x8001
RDP_INPUT_MOUSEX - 0x8002 */
/* call to xrdp_wm.c : callback */
self->session->callback(self->session->id, msg_type, param1, param2,
device_flags, time);
}
}
DEBUG(("out xrdp_rdp_process_data_input"));
return 0;
}
/*****************************************************************************/
static int
xrdp_rdp_send_synchronise(struct xrdp_rdp *self)
{
struct stream *s;
make_stream(s);
init_stream(s, 8192);
if (xrdp_rdp_init_data(self, s) != 0)
{
free_stream(s);
return 1;
}
out_uint16_le(s, 1); /* messageType (2 bytes) */
out_uint16_le(s, 1002); /* targetUser (2 bytes) */
s_mark_end(s);
if (xrdp_rdp_send_data(self, s, RDP_DATA_PDU_SYNCHRONISE) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
static int
xrdp_rdp_send_control(struct xrdp_rdp *self, int action)
{
struct stream *s;
make_stream(s);
init_stream(s, 8192);
if (xrdp_rdp_init_data(self, s) != 0)
{
free_stream(s);
return 1;
}
out_uint16_le(s, action);
out_uint16_le(s, 0); /* userid */
out_uint32_le(s, 1002); /* control id */
s_mark_end(s);
if (xrdp_rdp_send_data(self, s, RDP_DATA_PDU_CONTROL) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
static int
xrdp_rdp_process_data_control(struct xrdp_rdp *self, struct stream *s)
{
int action;
DEBUG(("xrdp_rdp_process_data_control"));
in_uint16_le(s, action);
in_uint8s(s, 2); /* user id */
in_uint8s(s, 4); /* control id */
if (action == RDP_CTL_REQUEST_CONTROL)
{
DEBUG(("xrdp_rdp_process_data_control got RDP_CTL_REQUEST_CONTROL"));
DEBUG(("xrdp_rdp_process_data_control calling xrdp_rdp_send_synchronise"));
xrdp_rdp_send_synchronise(self);
DEBUG(("xrdp_rdp_process_data_control sending RDP_CTL_COOPERATE"));
xrdp_rdp_send_control(self, RDP_CTL_COOPERATE);
DEBUG(("xrdp_rdp_process_data_control sending RDP_CTL_GRANT_CONTROL"));
xrdp_rdp_send_control(self, RDP_CTL_GRANT_CONTROL);
}
else
{
DEBUG(("xrdp_rdp_process_data_control unknown action"));
}
return 0;
}
/*****************************************************************************/
static int
xrdp_rdp_process_data_sync(struct xrdp_rdp *self)
{
DEBUG(("xrdp_rdp_process_data_sync"));
return 0;
}
/*****************************************************************************/
/* 2.2.11.2.1 Refresh Rect PDU Data (TS_REFRESH_RECT_PDU) */
static int
xrdp_rdp_process_screen_update(struct xrdp_rdp *self, struct stream *s)
{
int index;
int num_rects;
int left;
int top;
int right;
int bottom;
int cx;
int cy;
if (!s_check_rem(s, 4))
{
return 1;
}
in_uint8(s, num_rects);
in_uint8s(s, 3); /* pad */
g_writeln("xrdp_rdp_process_screen_update: num_rects %d", num_rects);
for (index = 0; index < num_rects; index++)
{
if (!s_check_rem(s, 8))
{
return 1;
}
/* Inclusive Rectangle (TS_RECTANGLE16) */
in_uint16_le(s, left);
in_uint16_le(s, top);
in_uint16_le(s, right);
in_uint16_le(s, bottom);
g_writeln(" left %d top %d right %d bottom %d",
left, top, right, bottom);
cx = (right - left) + 1;
cy = (bottom - top) + 1;
if (self->session->callback != 0)
{
self->session->callback(self->session->id, 0x4444,
left, top, cx, cy);
}
}
return 0;
}
/*****************************************************************************/
static int
xrdp_rdp_send_fontmap(struct xrdp_rdp *self)
{
struct stream *s;
make_stream(s);
init_stream(s, 8192);
if (xrdp_rdp_init_data(self, s) != 0)
{
free_stream(s);
return 1;
}
out_uint16_le(s, 0); /* numberEntries */
out_uint16_le(s, 0); /* totalNumEntries */
out_uint16_le(s, 0x3); /* mapFlags (sequence flags) */
out_uint16_le(s, 0x4); /* entrySize */
s_mark_end(s);
if (xrdp_rdp_send_data(self, s, 0x28) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
/*****************************************************************************/
static int
xrdp_rdp_process_data_font(struct xrdp_rdp *self, struct stream *s)
{
int seq;
DEBUG(("in xrdp_rdp_process_data_font"));
in_uint8s(s, 2); /* NumberFonts: 0x0, SHOULD be set to 0 */
in_uint8s(s, 2); /* TotalNumberFonts: 0x0, SHOULD be set to 0 */
in_uint16_le(s, seq); /* ListFlags */
/* 419 client sends Seq 1, then 2 */
/* 2600 clients sends only Seq 3 */
if (seq == 2 || seq == 3) /* after second font message, we are up and */
{
/* running */
DEBUG(("sending fontmap"));
xrdp_rdp_send_fontmap(self);
self->session->up_and_running = 1;
g_writeln("yeah, up_and_running");
DEBUG(("up_and_running set"));
xrdp_rdp_send_data_update_sync(self);
xrdp_channel_drdynvc_start(self->sec_layer->chan_layer);
}
DEBUG(("out xrdp_rdp_process_data_font"));
return 0;
}
/*****************************************************************************/
/* sent 37 pdu */
static int
xrdp_rdp_send_disconnect_query_response(struct xrdp_rdp *self)
{
struct stream *s;
make_stream(s);
init_stream(s, 8192);
if (xrdp_rdp_init_data(self, s) != 0)
{
free_stream(s);
return 1;
}
s_mark_end(s);
if (xrdp_rdp_send_data(self, s, 37) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
#if 0 /* not used */
/*****************************************************************************/
/* sent RDP_DATA_PDU_DISCONNECT 47 pdu */
static int
xrdp_rdp_send_disconnect_reason(struct xrdp_rdp *self, int reason)
{
struct stream *s;
make_stream(s);
init_stream(s, 8192);
if (xrdp_rdp_init_data(self, s) != 0)
{
free_stream(s);
return 1;
}
out_uint32_le(s, reason);
s_mark_end(s);
if (xrdp_rdp_send_data(self, s, RDP_DATA_PDU_DISCONNECT) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
#endif
/*****************************************************************************/
static int
xrdp_rdp_process_frame_ack(struct xrdp_rdp *self, struct stream *s)
{
int frame_id;
//g_writeln("xrdp_rdp_process_frame_ack:");
in_uint32_le(s, frame_id);
//g_writeln(" frame_id %d", frame_id);
if (self->session->callback != 0)
{
/* call to xrdp_wm.c : callback */
self->session->callback(self->session->id, 0x5557, frame_id, 0,
0, 0);
}
return 0;
}
/*****************************************************************************/
static int
xrdp_rdp_process_suppress(struct xrdp_rdp *self, struct stream *s)
{
int allowDisplayUpdates;
int left;
int top;
int right;
int bottom;
if (!s_check_rem(s, 1))
{
return 1;
}
in_uint8(s, allowDisplayUpdates);
g_writeln("xrdp_rdp_process_suppress: allowDisplayUpdates %d bytes "
"left %d", allowDisplayUpdates, (int) (s->end - s->p));
switch (allowDisplayUpdates)
{
case 0: /* SUPPRESS_DISPLAY_UPDATES */
self->client_info.suppress_output = 1;
g_writeln("xrdp_rdp_process_suppress: suppress_output %d",
self->client_info.suppress_output);
if (self->session->callback != 0)
{
self->session->callback(self->session->id, 0x5559, 1,
0, 0, 0);
}
break;
case 1: /* ALLOW_DISPLAY_UPDATES */
self->client_info.suppress_output = 0;
if (!s_check_rem(s, 11))
{
return 1;
}
in_uint8s(s, 3); /* pad */
in_uint16_le(s, left);
in_uint16_le(s, top);
in_uint16_le(s, right);
in_uint16_le(s, bottom);
g_writeln("xrdp_rdp_process_suppress: suppress_output %d "
"left %d top %d right %d bottom %d",
self->client_info.suppress_output,
left, top, right, bottom);
if (self->session->callback != 0)
{
self->session->callback(self->session->id, 0x5559, 0,
MAKELONG(left, top),
MAKELONG(right, bottom), 0);
}
break;
}
return 0;
}
/*****************************************************************************/
/* RDP_PDU_DATA */
int
xrdp_rdp_process_data(struct xrdp_rdp *self, struct stream *s)
{
int uncompressedLength;
int pduType2;
int compressedType;
int compressedLength;
if (!s_check_rem(s, 12))
{
return 1;
}
in_uint8s(s, 6);
in_uint16_le(s, uncompressedLength);
in_uint8(s, pduType2);
in_uint8(s, compressedType);
in_uint16_le(s, compressedLength);
if (compressedType != 0)
{
/* don't support compression */
return 1;
}
if (compressedLength > uncompressedLength)
{
return 1;
}
DEBUG(("xrdp_rdp_process_data pduType2 %d", pduType2));
switch (pduType2)
{
case RDP_DATA_PDU_POINTER: /* 27(0x1b) */
xrdp_rdp_process_data_pointer(self, s);
break;
case RDP_DATA_PDU_INPUT: /* 28(0x1c) */
xrdp_rdp_process_data_input(self, s);
break;
case RDP_DATA_PDU_CONTROL: /* 20(0x14) */
xrdp_rdp_process_data_control(self, s);
break;
case RDP_DATA_PDU_SYNCHRONISE: /* 31(0x1f) */
xrdp_rdp_process_data_sync(self);
break;
case PDUTYPE2_REFRESH_RECT:
xrdp_rdp_process_screen_update(self, s);
break;
case 35: /* 35(0x23) PDUTYPE2_SUPPRESS_OUTPUT */
xrdp_rdp_process_suppress(self, s);
break;
case 36: /* 36(0x24) ?? disconnect query? */
/* when this message comes, send a 37 back so the client */
/* is sure the connection is alive and it can ask if user */
/* really wants to disconnect */
xrdp_rdp_send_disconnect_query_response(self); /* send a 37 back */
break;
case RDP_DATA_PDU_FONT2: /* 39(0x27) */
xrdp_rdp_process_data_font(self, s);
break;
case 56: /* PDUTYPE2_FRAME_ACKNOWLEDGE 0x38 */
xrdp_rdp_process_frame_ack(self, s);
break;
default:
g_writeln("unknown in xrdp_rdp_process_data pduType2 %d", pduType2);
break;
}
return 0;
}
/*****************************************************************************/
int
xrdp_rdp_disconnect(struct xrdp_rdp *self)
{
int rv;
DEBUG(("in xrdp_rdp_disconnect"));
rv = xrdp_sec_disconnect(self->sec_layer);
DEBUG(("out xrdp_rdp_disconnect"));
return rv;
}
/*****************************************************************************/
int
xrdp_rdp_send_deactivate(struct xrdp_rdp *self)
{
struct stream *s;
DEBUG(("in xrdp_rdp_send_deactivate"));
make_stream(s);
init_stream(s, 8192);
if (xrdp_rdp_init(self, s) != 0)
{
free_stream(s);
DEBUG(("out xrdp_rdp_send_deactivate error"));
return 1;
}
s_mark_end(s);
if (xrdp_rdp_send(self, s, PDUTYPE_DEACTIVATEALLPDU) != 0)
{
free_stream(s);
DEBUG(("out xrdp_rdp_send_deactivate error"));
return 1;
}
free_stream(s);
DEBUG(("out xrdp_rdp_send_deactivate"));
return 0;
}
/*****************************************************************************/
int
xrdp_rdp_send_session_info(struct xrdp_rdp *self, const char *data,
int data_bytes)
{
struct stream *s;
LLOGLN(0, ("xrdp_rdp_send_session_info: data_bytes %d", data_bytes));
make_stream(s);
init_stream(s, 8192);
if (xrdp_rdp_init_data(self, s) != 0)
{
free_stream(s);
return 1;
}
if (s_check_rem_out(s, data_bytes))
{
out_uint8a(s, data, data_bytes);
}
else
{
free_stream(s);
return 1;
}
s_mark_end(s);
if (xrdp_rdp_send_data(self, s, RDP_DATA_PDU_LOGON) != 0)
{
free_stream(s);
return 1;
}
free_stream(s);
return 0;
}
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