/** * xrdp: A Remote Desktop Protocol server. * * Copyright (C) Timothy Pearson 2012-2019 * Copyright (C) Jay Sorg 2009-2013 * Copyright (C) Laxmikant Rashinkar 2009-2012 * * 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. */ #if defined(HAVE_CONFIG_H) #include #endif #include "arch.h" #include "os_calls.h" #include "thread_calls.h" #include "trans.h" #include "chansrv.h" #include "defines.h" #include "sound.h" #include "clipboard.h" #include "devredir.h" #include "list.h" #include "file.h" #include "log.h" #include "rail.h" #include "xcommon.h" #include "chansrv_fuse.h" #include "xrdp_sockets.h" #include "libraptorsmiface.h" static struct trans *g_lis_trans = 0; static struct trans *g_con_trans = 0; static struct trans *g_api_lis_trans = 0; static struct list *g_api_con_trans_list = 0; /* list of apps using api functions */ static struct chan_item g_chan_items[32]; static int g_num_chan_items = 0; static int g_cliprdr_index = -1; static int g_rdpsnd_index = -1; static int g_rdpdr_index = -1; static int g_rail_index = -1; static tbus g_term_event = 0; static tbus g_thread_done_event = 0; static int g_use_unix_socket = 0; int g_display_num = 0; int g_cliprdr_chan_id = -1; /* cliprdr */ int g_rdpsnd_chan_id = -1; /* rdpsnd */ int g_rdpdr_chan_id = -1; /* rdpdr */ int g_rail_chan_id = -1; /* rail */ // #define ENABLE_CHANSERV_DEBUG_LOGGING //#if 0 #include #include #include void dprint(const char *fmt, ...) { #ifdef ENABLE_CHANSERV_DEBUG_LOGGING va_list argp; va_start(argp, fmt); char debug[1024]; vsprintf(debug, fmt, argp); FILE *fp = fopen("/chansrv.debug", "a"); if (fp != NULL) { fputs(debug, fp); fclose(fp); } va_end(argp); #endif } #undef LOG #define LOG(_a, _params) \ { \ dprint _params; \ dprint("\n"); \ } char *g_exec_name; tbus g_exec_event; tbus g_exec_mutex; tbus g_exec_sem; int g_exec_pid = 0; #define ARRAYSIZE(x) (sizeof(x)/sizeof(*(x))) /* max total channel bytes size */ #define MAX_CHANNEL_BYTES (1 * 1024 * 1024 * 1024) /* 1 GB */ #define MAX_CHANNEL_FRAG_BYTES 1600 #define CHANSRV_DRDYNVC_STATUS_CLOSED 0 #define CHANSRV_DRDYNVC_STATUS_OPEN_SENT 1 #define CHANSRV_DRDYNVC_STATUS_OPEN 2 #define CHANSRV_DRDYNVC_STATUS_CLOSE_SENT 3 struct chansrv_drdynvc { int chan_id; int status; /* see CHANSRV_DRDYNVC_STATUS_* */ int flags; int pad0; int (*open_response)(int chan_id, int creation_status); int (*close_response)(int chan_id); int (*data_first)(int chan_id, char *data, int bytes, int total_bytes); int (*data)(int chan_id, char *data, int bytes); struct trans *xrdp_api_trans; }; static struct chansrv_drdynvc g_drdynvcs[256]; /* data in struct trans::callback_data */ struct xrdp_api_data { int chan_flags; int chan_id; }; struct timeout_obj { tui32 mstime; void *data; void (*callback)(void *data); struct timeout_obj *next; }; static struct timeout_obj *g_timeout_head = 0; static struct timeout_obj *g_timeout_tail = 0; /*****************************************************************************/ int add_timeout(int msoffset, void (*callback)(void *data), void *data) { struct timeout_obj *tobj; tui32 now; LOG(10, ("add_timeout:")); now = g_time3(); tobj = g_new0(struct timeout_obj, 1); tobj->mstime = now + msoffset; tobj->callback = callback; tobj->data = data; if (g_timeout_tail == 0) { g_timeout_head = tobj; g_timeout_tail = tobj; } else { g_timeout_tail->next = tobj; g_timeout_tail = tobj; } return 0; } /*****************************************************************************/ static int get_timeout(int *timeout) { struct timeout_obj *tobj; tui32 now; int ltimeout; LOG(10, ("get_timeout:")); ltimeout = *timeout; if (ltimeout < 1) { ltimeout = 0; } tobj = g_timeout_head; if (tobj != 0) { now = g_time3(); while (tobj != 0) { LOG(10, (" now %u tobj->mstime %u", now, tobj->mstime)); if (now < tobj->mstime) { ltimeout = tobj->mstime - now; } tobj = tobj->next; } } if (ltimeout > 0) { LOG(10, (" ltimeout %d", ltimeout)); if (*timeout < 1) { *timeout = ltimeout; } else { if (*timeout > ltimeout) { *timeout = ltimeout; } } } return 0; } /*****************************************************************************/ static int check_timeout(void) { struct timeout_obj *tobj; struct timeout_obj *last_tobj; struct timeout_obj *temp_tobj; int count; tui32 now; LOG(10, ("check_timeout:")); count = 0; tobj = g_timeout_head; if (tobj != 0) { last_tobj = 0; while (tobj != 0) { count++; now = g_time3(); if (now >= tobj->mstime) { tobj->callback(tobj->data); if (last_tobj == 0) { g_timeout_head = tobj->next; if (g_timeout_head == 0) { g_timeout_tail = 0; } } else { last_tobj->next = tobj->next; if (g_timeout_tail == tobj) { g_timeout_tail = last_tobj; } } temp_tobj = tobj; tobj = tobj->next; g_free(temp_tobj); } else { last_tobj = tobj; tobj = tobj->next; } } } LOG(10, (" count %d", count)); return 0; } /*****************************************************************************/ int g_is_term(void) { return g_is_wait_obj_set(g_term_event); } /*****************************************************************************/ /* send data to a static virtual channel size can be > MAX_CHANNEL_FRAG_BYTES, in which case, > 1 message will be sent*/ /* returns error */ int send_channel_data(int chan_id, const char *data, int size) { int sending_bytes; int chan_flags; int error; int total_size; struct stream *s; if ((chan_id < 0) || (chan_id > 31) || (data == NULL) || (size < 1) || (size > MAX_CHANNEL_BYTES)) { /* bad param */ return 1; } total_size = size; chan_flags = 1; /* first */ while (size > 0) { sending_bytes = MIN(MAX_CHANNEL_FRAG_BYTES, size); if (sending_bytes >= size) { chan_flags |= 2; /* last */ } s = trans_get_out_s(g_con_trans, 26 + sending_bytes); if (s == NULL) { return 2; } out_uint32_le(s, 0); /* version */ out_uint32_le(s, 26 + sending_bytes); out_uint32_le(s, 8); /* msg id */ out_uint32_le(s, 18 + sending_bytes); out_uint16_le(s, chan_id); out_uint16_le(s, chan_flags); out_uint16_le(s, sending_bytes); out_uint32_le(s, total_size); out_uint8a(s, data, sending_bytes); s_mark_end(s); size -= sending_bytes; data += sending_bytes; error = trans_write_copy(g_con_trans); if (error != 0) { return 3; } chan_flags = 0; } return 0; } /*****************************************************************************/ /* returns error */ int send_rail_drawing_orders(char* data, int size) { LOGM((LOG_LEVEL_DEBUG, "chansrv::send_rail_drawing_orders: size %d", size)); struct stream* s; int error; s = trans_get_out_s(g_con_trans, 8192); out_uint32_le(s, 0); /* version */ out_uint32_le(s, 8 + 8 + size); /* size */ out_uint32_le(s, 10); /* msg id */ out_uint32_le(s, 8 + size); /* size */ out_uint8a(s, data, size); s_mark_end(s); error = trans_force_write(g_con_trans); if (error != 0) { return 1; } return 0; } /*****************************************************************************/ /* returns error */ static int process_message_channel_setup(struct stream *s) { int num_chans; int index; int rv; struct chan_item *ci; g_num_chan_items = 0; g_cliprdr_index = -1; g_rdpsnd_index = -1; g_rdpdr_index = -1; g_rail_index = -1; g_cliprdr_chan_id = -1; g_rdpsnd_chan_id = -1; g_rdpdr_chan_id = -1; g_rail_chan_id = -1; LOGM((LOG_LEVEL_DEBUG, "process_message_channel_setup:")); in_uint16_le(s, num_chans); LOGM((LOG_LEVEL_DEBUG, "process_message_channel_setup: num_chans %d", num_chans)); for (index = 0; index < num_chans; index++) { ci = &(g_chan_items[g_num_chan_items]); g_memset(ci->name, 0, sizeof(ci->name)); in_uint8a(s, ci->name, 8); in_uint16_le(s, ci->id); in_uint16_le(s, ci->flags); LOGM((LOG_LEVEL_DEBUG, "process_message_channel_setup: chan name '%s' " "id %d flags %8.8x", ci->name, ci->id, ci->flags)); g_writeln("process_message_channel_setup: chan name '%s' " "id %d flags %8.8x", ci->name, ci->id, ci->flags); if (g_strcasecmp(ci->name, "cliprdr") == 0) { g_cliprdr_index = g_num_chan_items; g_cliprdr_chan_id = ci->id; } else if (g_strcasecmp(ci->name, "rdpsnd") == 0) { g_rdpsnd_index = g_num_chan_items; g_rdpsnd_chan_id = ci->id; } else if (g_strcasecmp(ci->name, "rdpdr") == 0) { g_rdpdr_index = g_num_chan_items; g_rdpdr_chan_id = ci->id; } /* disabled for now */ else if (g_strcasecmp(ci->name, "rail") == 0) { g_rail_index = g_num_chan_items; g_rail_chan_id = ci->id; } else { LOG(10, ("other %s", ci->name)); } g_num_chan_items++; } rv = 0; if (g_cliprdr_index >= 0) { clipboard_init(); xfuse_init(); } if (g_rdpsnd_index >= 0) { sound_init(); } if (g_rdpdr_index >= 0) { dev_redir_init(); xfuse_init(); } if (g_rail_index >= 0) { rail_init(); } // Use the display number to mark session connected in the Raptor session management database raptor_sm_set_session_state(g_display_num, SM_STATUS_CONNECTED); return rv; } /*****************************************************************************/ /* returns error */ static int process_message_channel_data(struct stream *s) { int chan_id; int chan_flags; int rv; int length; int total_length; int index; int found; struct stream *ls; struct trans *ltran; struct xrdp_api_data *api_data; in_uint16_le(s, chan_id); in_uint16_le(s, chan_flags); in_uint16_le(s, length); in_uint32_le(s, total_length); LOGM((LOG_LEVEL_DEBUG, "process_message_channel_data: chan_id %d " "chan_flags %d", chan_id, chan_flags)); LOG(10, ("process_message_channel_data")); rv = 0; if (rv == 0) { if (chan_id == g_cliprdr_chan_id) { rv = clipboard_data_in(s, chan_id, chan_flags, length, total_length); } else if (chan_id == g_rdpsnd_chan_id) { rv = sound_data_in(s, chan_id, chan_flags, length, total_length); } else if (chan_id == g_rdpdr_chan_id) { rv = dev_redir_data_in(s, chan_id, chan_flags, length, total_length); } else if (chan_id == g_rail_chan_id) { rv = rail_data_in(s, chan_id, chan_flags, length, total_length); } else { found = 0; for (index = 0; index < g_api_con_trans_list->count; index++) { ltran = (struct trans *) list_get_item(g_api_con_trans_list, index); if (ltran != NULL) { api_data = (struct xrdp_api_data *) (ltran->callback_data); if (api_data != NULL) { if (api_data->chan_id == chan_id) { found = 1; ls = ltran->out_s; if (chan_flags & 1) /* first */ { init_stream(ls, total_length); } out_uint8a(ls, s->p, length); if (chan_flags & 2) /* last */ { s_mark_end(ls); rv = trans_write_copy(ltran); } break; } } } } if (found == 0) { LOG(0, ("process_message_channel_data: not found channel %d", chan_id)); } } } return rv; } /*****************************************************************************/ /* returns error */ /* open response from client */ static int process_message_drdynvc_open_response(struct stream *s) { struct chansrv_drdynvc *drdynvc; int chan_id; int creation_status; LOG(10, ("process_message_drdynvc_open_response:")); if (!s_check_rem(s, 8)) { return 1; } in_uint32_le(s, chan_id); in_uint32_le(s, creation_status); if ((chan_id < 0) || (chan_id > 255)) { return 1; } drdynvc = g_drdynvcs + chan_id; if (drdynvc->status != CHANSRV_DRDYNVC_STATUS_OPEN_SENT) { g_writeln("process_message_drdynvc_open_response: status not right"); return 1; } if (creation_status == 0) { drdynvc->status = CHANSRV_DRDYNVC_STATUS_OPEN; } else { drdynvc->status = CHANSRV_DRDYNVC_STATUS_CLOSED; } if (drdynvc->open_response != NULL) { if (drdynvc->open_response(chan_id, creation_status) != 0) { return 1; } } return 0; } /*****************************************************************************/ /* returns error */ /* close response from client */ static int process_message_drdynvc_close_response(struct stream *s) { struct chansrv_drdynvc *drdynvc; int chan_id; LOG(10, ("process_message_drdynvc_close_response:")); if (!s_check_rem(s, 4)) { return 1; } in_uint32_le(s, chan_id); if ((chan_id < 0) || (chan_id > 255)) { return 1; } drdynvc = g_drdynvcs + chan_id; if (drdynvc->status != CHANSRV_DRDYNVC_STATUS_CLOSE_SENT) { g_writeln("process_message_drdynvc_close_response: status not right"); return 0; } drdynvc->status = CHANSRV_DRDYNVC_STATUS_CLOSED; if (drdynvc->close_response != NULL) { if (drdynvc->close_response(chan_id) != 0) { return 1; } } return 0; } /*****************************************************************************/ /* returns error */ /* data from client */ static int process_message_drdynvc_data_first(struct stream *s) { struct chansrv_drdynvc *drdynvc; int chan_id; int bytes; int total_bytes; char *data; LOG(10, ("process_message_drdynvc_data_first:")); if (!s_check_rem(s, 12)) { return 1; } in_uint32_le(s, chan_id); in_uint32_le(s, bytes); in_uint32_le(s, total_bytes); if (!s_check_rem(s, bytes)) { return 1; } in_uint8p(s, data, bytes); if ((chan_id < 0) || (chan_id > 255)) { return 1; } drdynvc = g_drdynvcs + chan_id; if (drdynvc->data_first != NULL) { if (drdynvc->data_first(chan_id, data, bytes, total_bytes) != 0) { return 1; } } return 0; } /*****************************************************************************/ /* returns error */ /* data from client */ static int process_message_drdynvc_data(struct stream *s) { struct chansrv_drdynvc *drdynvc; int chan_id; int bytes; char *data; LOG(10, ("process_message_drdynvc_data:")); if (!s_check_rem(s, 8)) { return 1; } in_uint32_le(s, chan_id); in_uint32_le(s, bytes); if (!s_check_rem(s, bytes)) { return 1; } in_uint8p(s, data, bytes); drdynvc = g_drdynvcs + chan_id; if (drdynvc->data != NULL) { if (drdynvc->data(chan_id, data, bytes) != 0) { return 1; } } return 0; } /*****************************************************************************/ /* open call from chansrv */ int chansrv_drdynvc_open(const char *name, int flags, struct chansrv_drdynvc_procs *procs, int *chan_id) { struct stream *s; int name_bytes; int lchan_id; int error; lchan_id = 1; while (g_drdynvcs[lchan_id].status != CHANSRV_DRDYNVC_STATUS_CLOSED) { lchan_id++; if (lchan_id > 255) { return 1; } } s = trans_get_out_s(g_con_trans, 8192); if (s == NULL) { return 1; } name_bytes = g_strlen(name); out_uint32_le(s, 0); /* version */ out_uint32_le(s, 8 + 8 + 4 + name_bytes + 4 + 4); out_uint32_le(s, 12); /* msg id */ out_uint32_le(s, 8 + 4 + name_bytes + 4 + 4); out_uint32_le(s, name_bytes); out_uint8a(s, name, name_bytes); out_uint32_le(s, flags); out_uint32_le(s, lchan_id); s_mark_end(s); error = trans_write_copy(g_con_trans); if (error == 0) { if (chan_id != NULL) { *chan_id = lchan_id; g_drdynvcs[lchan_id].open_response = procs->open_response; g_drdynvcs[lchan_id].close_response = procs->close_response; g_drdynvcs[lchan_id].data_first = procs->data_first; g_drdynvcs[lchan_id].data = procs->data; g_drdynvcs[lchan_id].status = CHANSRV_DRDYNVC_STATUS_OPEN_SENT; } } return error; } /*****************************************************************************/ /* close call from chansrv */ int chansrv_drdynvc_close(int chan_id) { struct stream *s; int error; s = trans_get_out_s(g_con_trans, 8192); if (s == NULL) { return 1; } out_uint32_le(s, 0); /* version */ out_uint32_le(s, 20); out_uint32_le(s, 14); /* msg id */ out_uint32_le(s, 12); out_uint32_le(s, chan_id); s_mark_end(s); error = trans_write_copy(g_con_trans); g_drdynvcs[chan_id].status = CHANSRV_DRDYNVC_STATUS_CLOSE_SENT; return error; } /*****************************************************************************/ int chansrv_drdynvc_data_first(int chan_id, const char *data, int data_bytes, int total_data_bytes) { struct stream *s; int error; //g_writeln("chansrv_drdynvc_data_first: data_bytes %d total_data_bytes %d", // data_bytes, total_data_bytes); s = trans_get_out_s(g_con_trans, 8192); if (s == NULL) { return 1; } out_uint32_le(s, 0); /* version */ out_uint32_le(s, 28 + data_bytes); out_uint32_le(s, 16); /* msg id */ out_uint32_le(s, 20 + data_bytes); out_uint32_le(s, chan_id); out_uint32_le(s, data_bytes); out_uint32_le(s, total_data_bytes); out_uint8a(s, data, data_bytes); s_mark_end(s); error = trans_write_copy(g_con_trans); return error; } /*****************************************************************************/ int chansrv_drdynvc_data(int chan_id, const char *data, int data_bytes) { struct stream *s; int error; //g_writeln("chansrv_drdynvc_data: data_bytes %d", data_bytes); s = trans_get_out_s(g_con_trans, 8192); if (s == NULL) { return 1; } out_uint32_le(s, 0); /* version */ out_uint32_le(s, 24 + data_bytes); out_uint32_le(s, 18); /* msg id */ out_uint32_le(s, 16 + data_bytes); out_uint32_le(s, chan_id); out_uint32_le(s, data_bytes); out_uint8a(s, data, data_bytes); s_mark_end(s); error = trans_write_copy(g_con_trans); return error; } /*****************************************************************************/ int chansrv_drdynvc_send_data(int chan_id, const char *data, int data_bytes) { int this_send_bytes; //g_writeln("chansrv_drdynvc_send_data: data_bytes %d", data_bytes); if (data_bytes > 1590) { if (chansrv_drdynvc_data_first(chan_id, data, 1590, data_bytes) != 0) { return 1; } data_bytes -= 1590; data += 1590; } while (data_bytes > 0) { this_send_bytes = MIN(1590, data_bytes); if (chansrv_drdynvc_data(chan_id, data, this_send_bytes) != 0) { return 1; } data_bytes -= this_send_bytes; data += this_send_bytes; } return 0; } /*****************************************************************************/ /* returns error */ static int process_message(void) { struct stream *s = (struct stream *)NULL; int size = 0; int id = 0; int rv = 0; char *next_msg = (char *)NULL; if (g_con_trans == 0) { return 1; } s = trans_get_in_s(g_con_trans); if (s == 0) { return 1; } rv = 0; while (s_check_rem(s, 8)) { next_msg = s->p; in_uint32_le(s, id); in_uint32_le(s, size); next_msg += size; switch (id) { case 3: /* channel setup */ rv = process_message_channel_setup(s); break; case 5: /* channel data */ rv = process_message_channel_data(s); break; case 13: /* drdynvc open response */ rv = process_message_drdynvc_open_response(s); break; case 15: /* drdynvc close response */ rv = process_message_drdynvc_close_response(s); break; case 17: /* drdynvc data first */ rv = process_message_drdynvc_data_first(s); break; case 19: /* drdynvc data */ rv = process_message_drdynvc_data(s); break; default: LOGM((LOG_LEVEL_ERROR, "process_message: unknown msg %d", id)); break; } if (rv != 0) { g_writeln("process_message: error rv %d id %d", rv, id); rv = 0; } s->p = next_msg; } return rv; } /*****************************************************************************/ /* returns error */ int my_trans_data_in(struct trans *trans) { struct stream *s = (struct stream *)NULL; int size = 0; int error = 0; if (trans == 0) { return 0; } if (trans != g_con_trans) { return 1; } LOGM((LOG_LEVEL_DEBUG, "my_trans_data_in:")); s = trans_get_in_s(trans); in_uint8s(s, 4); /* id */ in_uint32_le(s, size); error = trans_force_read(trans, size - 8); if (error == 0) { /* here, the entire message block is read in, process it */ error = process_message(); if (error == 0) { } else { g_writeln("my_trans_data_in: process_message failed"); } } else { g_writeln("my_trans_data_in: trans_force_read failed"); } return error; } /*****************************************************************************/ struct trans * get_api_trans_from_chan_id(int chan_id) { return g_drdynvcs[chan_id].xrdp_api_trans; } /*****************************************************************************/ static int my_api_open_response(int chan_id, int creation_status) { struct trans *trans; struct stream *s; //g_writeln("my_api_open_response: chan_id %d creation_status %d", // chan_id, creation_status); trans = get_api_trans_from_chan_id(chan_id); if (trans == NULL) { return 1; } s = trans_get_out_s(trans, 8192); if (s == NULL) { return 1; } out_uint32_le(s, creation_status); s_mark_end(s); if (trans_write_copy(trans) != 0) { return 1; } return 0; } /*****************************************************************************/ static int my_api_close_response(int chan_id) { //g_writeln("my_api_close_response:"); return 0; } /*****************************************************************************/ static int my_api_data_first(int chan_id, char *data, int bytes, int total_bytes) { struct trans *trans; struct stream *s; //g_writeln("my_api_data_first: bytes %d total_bytes %d", bytes, total_bytes); trans = get_api_trans_from_chan_id(chan_id); if (trans == NULL) { return 1; } s = trans_get_out_s(trans, bytes); if (s == NULL) { return 1; } out_uint8a(s, data, bytes); s_mark_end(s); if (trans_write_copy(trans) != 0) { return 1; } return 0; } /*****************************************************************************/ static int my_api_data(int chan_id, char *data, int bytes) { struct trans *trans; struct stream *s; //g_writeln("my_api_data: bytes %d", bytes); trans = get_api_trans_from_chan_id(chan_id); if (trans == NULL) { return 1; } s = trans_get_out_s(trans, bytes); if (s == NULL) { return 1; } out_uint8a(s, data, bytes); s_mark_end(s); if (trans_write_copy(trans) != 0) { return 1; } return 0; } /* * called when WTSVirtualChannelWrite() is invoked in xrdpapi.c * ******************************************************************************/ int my_api_trans_data_in(struct trans *trans) { struct stream *s; struct stream *out_s; struct xrdp_api_data *ad; int index; int rv; int bytes; int ver; int channel_name_bytes; struct chansrv_drdynvc_procs procs; char *chan_name; //g_writeln("my_api_trans_data_in: extra_flags %d", trans->extra_flags); rv = 0; ad = (struct xrdp_api_data *) (trans->callback_data); s = trans_get_in_s(trans); if (trans->extra_flags == 0) { in_uint32_le(s, bytes); in_uint32_le(s, ver); //g_writeln("my_api_trans_data_in: bytes %d ver %d", bytes, ver); if (ver != 0) { return 1; } trans->header_size = bytes; trans->extra_flags = 1; } else if (trans->extra_flags == 1) { rv = 1; in_uint32_le(s, channel_name_bytes); //g_writeln("my_api_trans_data_in: channel_name_bytes %d", channel_name_bytes); chan_name = g_new0(char, channel_name_bytes + 1); if (chan_name == NULL) { return 1; } in_uint8a(s, chan_name, channel_name_bytes); in_uint32_le(s, ad->chan_flags); //g_writeln("my_api_trans_data_in: chan_name %s chan_flags 0x%8.8x", chan_name, ad->chan_flags); if (ad->chan_flags == 0) { /* SVC */ for (index = 0; index < g_num_chan_items; index++) { if (g_strcasecmp(g_chan_items[index].name, chan_name) == 0) { ad->chan_id = g_chan_items[index].id; rv = 0; break; } } if (rv == 0) { /* open ok */ out_s = trans_get_out_s(trans, 8192); if (out_s == NULL) { return 1; } out_uint32_le(out_s, 0); s_mark_end(out_s); if (trans_write_copy(trans) != 0) { return 1; } } else { /* open failed */ out_s = trans_get_out_s(trans, 8192); if (out_s == NULL) { return 1; } out_uint32_le(out_s, 1); s_mark_end(out_s); if (trans_write_copy(trans) != 0) { return 1; } } } else { /* DVS */ g_memset(&procs, 0, sizeof(procs)); procs.open_response = my_api_open_response; procs.close_response = my_api_close_response; procs.data_first = my_api_data_first; procs.data = my_api_data; rv = chansrv_drdynvc_open(chan_name, ad->chan_flags, &procs, &(ad->chan_id)); //g_writeln("my_api_trans_data_in: chansrv_drdynvc_open rv %d " // "chan_id %d", rv, ad->chan_id); g_drdynvcs[ad->chan_id].xrdp_api_trans = trans; } g_free(chan_name); init_stream(s, 0); trans->extra_flags = 2; trans->header_size = 0; } else { bytes = g_sck_recv(trans->sck, s->data, s->size, 0); if (bytes < 1) { //g_writeln("my_api_trans_data_in: disconnect"); return 1; } if (ad->chan_flags == 0) { /* SVC */ rv = send_channel_data(ad->chan_id, s->data, bytes); } else { /* DVS */ //g_writeln("my_api_trans_data_in: s->size %d bytes %d", s->size, bytes); rv = chansrv_drdynvc_send_data(ad->chan_id, s->data, bytes); } init_stream(s, 0); } return rv; } /*****************************************************************************/ int my_trans_conn_in(struct trans *trans, struct trans *new_trans) { if (trans == 0) { return 1; } if (trans != g_lis_trans) { return 1; } if (g_con_trans != 0) /* if already set, error */ { return 1; } if (new_trans == 0) { return 1; } LOGM((LOG_LEVEL_DEBUG, "my_trans_conn_in:")); g_con_trans = new_trans; g_con_trans->trans_data_in = my_trans_data_in; g_con_trans->header_size = 8; /* stop listening */ trans_delete(g_lis_trans); g_lis_trans = 0; return 0; } /* * called when WTSVirtualChannelOpenEx is invoked in xrdpapi.c * ******************************************************************************/ int my_api_trans_conn_in(struct trans *trans, struct trans *new_trans) { struct xrdp_api_data *ad; //g_writeln("my_api_trans_conn_in:"); if ((trans == NULL) || (trans != g_api_lis_trans) || (new_trans == NULL)) { g_writeln("my_api_trans_conn_in: error"); return 1; } new_trans->trans_data_in = my_api_trans_data_in; new_trans->header_size = 8; new_trans->no_stream_init_on_data_in = 1; ad = g_new0(struct xrdp_api_data, 1); if (ad == NULL) { g_writeln("my_api_trans_conn_in: error"); return 1; } new_trans->callback_data = ad; list_add_item(g_api_con_trans_list, (intptr_t) new_trans); return 0; } /*****************************************************************************/ static int setup_listen(void) { char port[256]; int error = 0; if (g_lis_trans != 0) { trans_delete(g_lis_trans); } if (g_use_unix_socket) { g_lis_trans = trans_create(TRANS_MODE_UNIX, 8192, 8192); g_lis_trans->is_term = g_is_term; g_snprintf(port, 255, XRDP_CHANSRV_STR, g_display_num); } else { g_lis_trans = trans_create(TRANS_MODE_TCP, 8192, 8192); g_lis_trans->is_term = g_is_term; g_snprintf(port, 255, "%d", 7200 + g_display_num); } g_lis_trans->trans_conn_in = my_trans_conn_in; error = trans_listen(g_lis_trans, port); if (error != 0) { LOGM((LOG_LEVEL_ERROR, "setup_listen: trans_listen failed for port %s", port)); return 1; } return 0; } /*****************************************************************************/ static int setup_api_listen(void) { char port[256]; int error = 0; g_api_lis_trans = trans_create(TRANS_MODE_UNIX, 8192 * 4, 8192 * 4); g_api_lis_trans->is_term = g_is_term; g_snprintf(port, 255, CHANSRV_API_STR, g_display_num); g_api_lis_trans->trans_conn_in = my_api_trans_conn_in; error = trans_listen(g_api_lis_trans, port); if (error != 0) { LOGM((LOG_LEVEL_ERROR, "setup_api_listen: trans_listen failed for port %s", port)); return 1; } return 0; } /*****************************************************************************/ static int api_con_trans_list_get_wait_objs_rw(intptr_t *robjs, int *rcount, intptr_t *wobjs, int *wcount, int *timeout) { int api_con_index; struct trans *ltran; for (api_con_index = g_api_con_trans_list->count - 1; api_con_index >= 0; api_con_index--) { ltran = (struct trans *) list_get_item(g_api_con_trans_list, api_con_index); if (ltran != NULL) { trans_get_wait_objs_rw(ltran, robjs, rcount, wobjs, wcount, timeout); } } return 0; } /*****************************************************************************/ static int api_con_trans_list_check_wait_objs(void) { int api_con_index; int drdynvc_index; struct trans *ltran; struct xrdp_api_data *ad; for (api_con_index = g_api_con_trans_list->count - 1; api_con_index >= 0; api_con_index--) { ltran = (struct trans *) list_get_item(g_api_con_trans_list, api_con_index); if (ltran != NULL) { if (trans_check_wait_objs(ltran) != 0) { /* disconnect */ list_remove_item(g_api_con_trans_list, api_con_index); ad = (struct xrdp_api_data *) (ltran->callback_data); if (ad->chan_flags != 0) { chansrv_drdynvc_close(ad->chan_id); } for (drdynvc_index = 0; drdynvc_index < (int) ARRAYSIZE(g_drdynvcs); drdynvc_index++) { if (g_drdynvcs[drdynvc_index].xrdp_api_trans == ltran) { g_drdynvcs[drdynvc_index].xrdp_api_trans = NULL; } } g_free(ad); trans_delete(ltran); } } } return 0; } /*****************************************************************************/ static int api_con_trans_list_remove_all(void) { int api_con_index; struct trans *ltran; for (api_con_index = g_api_con_trans_list->count - 1; api_con_index >= 0; api_con_index--) { ltran = (struct trans *) list_get_item(g_api_con_trans_list, api_con_index); if (ltran != NULL) { list_remove_item(g_api_con_trans_list, api_con_index); g_free(ltran->callback_data); trans_delete(ltran); } } return 0; } /*****************************************************************************/ THREAD_RV THREAD_CC channel_thread_loop(void *in_val) { tbus objs[32]; tbus wobjs[32]; int num_objs; int num_wobjs; int timeout; int error; THREAD_RV rv; LOGM((LOG_LEVEL_INFO, "channel_thread_loop: thread start")); rv = 0; g_api_con_trans_list = list_create(); setup_api_listen(); error = setup_listen(); if (error == 0) { timeout = -1; num_objs = 0; num_wobjs = 0; objs[num_objs] = g_term_event; num_objs++; trans_get_wait_objs(g_lis_trans, objs, &num_objs); trans_get_wait_objs(g_api_lis_trans, objs, &num_objs); //g_writeln("timeout %d", timeout); while (g_obj_wait(objs, num_objs, wobjs, num_wobjs, timeout) == 0) { check_timeout(); if (g_is_wait_obj_set(g_term_event)) { LOGM((LOG_LEVEL_INFO, "channel_thread_loop: g_term_event set")); clipboard_deinit(); sound_deinit(); dev_redir_deinit(); rail_deinit(); break; } if (g_lis_trans != 0) { if (trans_check_wait_objs(g_lis_trans) != 0) { LOGM((LOG_LEVEL_INFO, "channel_thread_loop: " "trans_check_wait_objs error")); } } if (g_con_trans != 0) { if (trans_check_wait_objs(g_con_trans) != 0) { LOGM((LOG_LEVEL_INFO, "channel_thread_loop: " "trans_check_wait_objs error resetting")); clipboard_deinit(); sound_deinit(); dev_redir_deinit(); rail_deinit(); /* delete g_con_trans */ trans_delete(g_con_trans); g_con_trans = 0; /* use the display number to mark session disconnected in the Raptor session management database */ raptor_sm_set_session_state(g_display_num, SM_STATUS_RUNNING); /* create new listener */ error = setup_listen(); if (error != 0) { break; } } } if (g_api_lis_trans != 0) { if (trans_check_wait_objs(g_api_lis_trans) != 0) { LOG(0, ("channel_thread_loop: trans_check_wait_objs failed")); } } /* check the wait_objs in g_api_con_trans_list */ api_con_trans_list_check_wait_objs(); xcommon_check_wait_objs(); sound_check_wait_objs(); dev_redir_check_wait_objs(); xfuse_check_wait_objs(); timeout = -1; num_objs = 0; num_wobjs = 0; objs[num_objs] = g_term_event; num_objs++; trans_get_wait_objs_rw(g_lis_trans, objs, &num_objs, wobjs, &num_wobjs, &timeout); trans_get_wait_objs_rw(g_con_trans, objs, &num_objs, wobjs, &num_wobjs, &timeout); trans_get_wait_objs_rw(g_api_lis_trans, objs, &num_objs, wobjs, &num_wobjs, &timeout); /* get the wait_objs from in g_api_con_trans_list */ api_con_trans_list_get_wait_objs_rw(objs, &num_objs, wobjs, &num_wobjs, &timeout); xcommon_get_wait_objs(objs, &num_objs, &timeout); sound_get_wait_objs(objs, &num_objs, &timeout); dev_redir_get_wait_objs(objs, &num_objs, &timeout); xfuse_get_wait_objs(objs, &num_objs, &timeout); get_timeout(&timeout); } /* end while (g_obj_wait(objs, num_objs, 0, 0, timeout) == 0) */ } trans_delete(g_lis_trans); g_lis_trans = 0; trans_delete(g_con_trans); g_con_trans = 0; trans_delete(g_api_lis_trans); g_api_lis_trans = 0; api_con_trans_list_remove_all(); list_delete(g_api_con_trans_list); LOGM((LOG_LEVEL_INFO, "channel_thread_loop: thread stop")); g_set_wait_obj(g_thread_done_event); return rv; } /*****************************************************************************/ void term_signal_handler(int sig) { LOGM((LOG_LEVEL_INFO, "term_signal_handler: got signal %d", sig)); g_set_wait_obj(g_term_event); } /*****************************************************************************/ void nil_signal_handler(int sig) { LOGM((LOG_LEVEL_INFO, "nil_signal_handler: got signal %d", sig)); } /*****************************************************************************/ void child_signal_handler(int sig) { int pid; LOG(0, ("child_signal_handler:")); do { pid = g_waitchild(); LOG(0, ("child_signal_handler: child pid %d", pid)); if ((pid == g_exec_pid) && (pid > 0)) { LOG(0, ("child_signal_handler: found pid %d", pid)); //shutdownx(); } } while (pid >= 0); } /*****************************************************************************/ void segfault_signal_handler(int sig) { LOG(0, ("segfault_signal_handler: entered.......")); xfuse_deinit(); exit(0); } /*****************************************************************************/ static void x_server_fatal_handler(void) { LOGM((LOG_LEVEL_INFO, "xserver_fatal_handler: entered.......")); /* At this point the X server has gone away. Dont make any X calls. */ xfuse_deinit(); exit(0); } /*****************************************************************************/ static int get_display_num_from_display(char *display_text) { int index; int mode; int host_index; int disp_index; int scre_index; char host[256]; char disp[256]; char scre[256]; g_memset(host, 0, 256); g_memset(disp, 0, 256); g_memset(scre, 0, 256); index = 0; host_index = 0; disp_index = 0; scre_index = 0; mode = 0; while (display_text[index] != 0) { if (display_text[index] == ':') { mode = 1; } else if (display_text[index] == '.') { mode = 2; } else if (mode == 0) { host[host_index] = display_text[index]; host_index++; } else if (mode == 1) { disp[disp_index] = display_text[index]; disp_index++; } else if (mode == 2) { scre[scre_index] = display_text[index]; scre_index++; } index++; } host[host_index] = 0; disp[disp_index] = 0; scre[scre_index] = 0; g_display_num = g_atoi(disp); return 0; } /*****************************************************************************/ int main_cleanup(void) { g_delete_wait_obj(g_term_event); g_delete_wait_obj(g_thread_done_event); g_delete_wait_obj(g_exec_event); tc_mutex_delete(g_exec_mutex); g_deinit(); /* os_calls */ return 0; } /*****************************************************************************/ static int read_ini(void) { char filename[256]; struct list *names; struct list *values; char *name; char *value; int index; g_memset(filename, 0, (sizeof(char) * 256)); names = list_create(); names->auto_free = 1; values = list_create(); values->auto_free = 1; g_use_unix_socket = 0; g_snprintf(filename, 255, "%s/sesman.ini", XRDP_CFG_PATH); if (file_by_name_read_section(filename, "Globals", names, values) == 0) { for (index = 0; index < names->count; index++) { name = (char *)list_get_item(names, index); value = (char *)list_get_item(values, index); #ifndef DISABLE_UNIX_DOMAIN_SOCKETS if (g_strcasecmp(name, "ListenAddress") == 0) { if (g_strcasecmp(value, "127.0.0.1") == 0) { g_use_unix_socket = 1; } } #endif } } list_delete(names); list_delete(values); return 0; } /*****************************************************************************/ static int get_log_path(char *path, int bytes) { char* log_path; int rv; rv = 1; log_path = g_getenv("CHANSRV_LOG_PATH"); if (log_path == 0) { log_path = g_getenv("XDG_DATA_HOME"); if (log_path != 0) { g_snprintf(path, bytes, "%s%s", log_path, "/xrdp"); if (g_directory_exist(path) || (g_mkdir(path) == 0)) { rv = 0; } } } else { g_snprintf(path, bytes, "%s", log_path); if (g_directory_exist(path) || (g_mkdir(path) == 0)) { rv = 0; } } if (rv != 0) { log_path = g_getenv("HOME"); if (log_path != 0) { g_snprintf(path, bytes, "%s%s", log_path, "/.local"); if (g_directory_exist(path) || (g_mkdir(path) == 0)) { g_snprintf(path, bytes, "%s%s", log_path, "/.local/share"); if (g_directory_exist(path) || (g_mkdir(path) == 0)) { g_snprintf(path, bytes, "%s%s", log_path, "/.local/share/xrdp"); if (g_directory_exist(path) || (g_mkdir(path) == 0)) { rv = 0; } } } } } return rv; } /*****************************************************************************/ static enum logLevels get_log_level(const char* level_str, enum logLevels default_level) { static const char* levels[] = { "LOG_LEVEL_ALWAYS", "LOG_LEVEL_ERROR", "LOG_LEVEL_WARNING", "LOG_LEVEL_INFO", "LOG_LEVEL_DEBUG", "LOG_LEVEL_TRACE" }; unsigned int i; if (level_str == NULL || level_str[0] == 0) { return default_level; } for (i = 0; i < ARRAYSIZE(levels); ++i) { if (g_strcasecmp(levels[i], level_str) == 0) { return (enum logLevels) i; } } return default_level; } /*****************************************************************************/ static int run_exec(void) { int pid; LOG(10, ("run_exec:")); pid = g_fork(); if (pid == 0) { trans_delete(g_con_trans); g_close_wait_obj(g_term_event); g_close_wait_obj(g_thread_done_event); g_close_wait_obj(g_exec_event); tc_mutex_delete(g_exec_mutex); tc_sem_delete(g_exec_sem); g_execlp3(g_exec_name, g_exec_name, 0); g_exit(0); } g_exec_pid = pid; tc_sem_inc(g_exec_sem); return 0; } /*****************************************************************************/ int main(int argc, char **argv) { tbus waiters[4]; int pid = 0; char text[256]; char log_path[256]; char *display_text; char log_file[256]; enum logReturns error; struct log_config logconfig; enum logLevels log_level; g_init("xrdp-chansrv"); /* os_calls */ log_path[255] = 0; if (get_log_path(log_path, 255) != 0) { g_writeln("error reading CHANSRV_LOG_PATH and HOME environment variable"); g_deinit(); return 1; } read_ini(); pid = g_getpid(); display_text = g_getenv("DISPLAY"); if (display_text) get_display_num_from_display(display_text); log_level = get_log_level(g_getenv("CHANSRV_LOG_LEVEL"), LOG_LEVEL_INFO); /* starting logging subsystem */ g_memset(&logconfig, 0, sizeof(struct log_config)); logconfig.program_name = "xrdp-chansrv"; g_snprintf(log_file, 255, "%s/xrdp-chansrv.%d.log", log_path, g_display_num); g_writeln("chansrv::main: using log file [%s]", log_file); if (g_file_exist(log_file)) { g_file_delete(log_file); } g_memset(g_drdynvcs, 0, sizeof(g_drdynvcs)); logconfig.log_file = log_file; logconfig.fd = -1; logconfig.log_level = log_level; logconfig.enable_syslog = 0; logconfig.syslog_level = LOG_LEVEL_ALWAYS; error = log_start_from_param(&logconfig); if (error != LOG_STARTUP_OK) { switch (error) { case LOG_ERROR_MALLOC: g_writeln("error on malloc. cannot start logging. quitting."); break; case LOG_ERROR_FILE_OPEN: g_writeln("error opening log file [%s]. quitting.", getLogFile(text, 255)); break; default: g_writeln("log_start error"); break; } g_deinit(); return 1; } LOGM((LOG_LEVEL_ALWAYS, "main: app started pid %d(0x%8.8x)", pid, pid)); /* set up signal handler */ g_signal_terminate(term_signal_handler); /* SIGTERM */ g_signal_user_interrupt(term_signal_handler); /* SIGINT */ g_signal_pipe(nil_signal_handler); /* SIGPIPE */ g_signal_child_stop(child_signal_handler); /* SIGCHLD */ g_signal_segfault(segfault_signal_handler); /* Cater for the X server exiting unexpectedly */ xcommon_set_x_server_fatal_handler(x_server_fatal_handler); LOGM((LOG_LEVEL_INFO, "main: DISPLAY env var set to %s", display_text)); if (g_display_num == 0) { LOGM((LOG_LEVEL_ERROR, "main: error, display is zero")); g_deinit(); return 1; } LOGM((LOG_LEVEL_INFO, "main: using DISPLAY %d", g_display_num)); g_snprintf(text, 255, "xrdp_chansrv_%8.8x_main_term", pid); g_term_event = g_create_wait_obj(text); g_snprintf(text, 255, "xrdp_chansrv_%8.8x_thread_done", pid); g_thread_done_event = g_create_wait_obj(text); g_snprintf(text, 255, "xrdp_chansrv_%8.8x_exec", pid); g_exec_event = g_create_wait_obj(text); g_exec_mutex = tc_mutex_create(); g_exec_sem = tc_sem_create(0); tc_thread_create(channel_thread_loop, 0); while (g_term_event > 0 && !g_is_wait_obj_set(g_term_event)) { waiters[0] = g_term_event; waiters[1] = g_exec_event; if (g_obj_wait(waiters, 2, 0, 0, 0) != 0) { LOGM((LOG_LEVEL_ERROR, "main: error, g_obj_wait failed")); break; } if (g_is_wait_obj_set(g_term_event)) { break; } if (g_is_wait_obj_set(g_exec_event)) { g_reset_wait_obj(g_exec_event); run_exec(); } } while (g_thread_done_event > 0 && !g_is_wait_obj_set(g_thread_done_event)) { /* wait for thread to exit */ if (g_obj_wait(&g_thread_done_event, 1, 0, 0, 0) != 0) { LOGM((LOG_LEVEL_ERROR, "main: error, g_obj_wait failed")); break; } } /* use the display number to mark session disconnected in the Raptor session management database */ raptor_sm_set_session_state(g_display_num, SM_STATUS_RUNNING); /* cleanup */ main_cleanup(); LOGM((LOG_LEVEL_INFO, "main: app exiting pid %d(0x%8.8x)", pid, pid)); g_deinit(); return 0; }