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/* -*- c-basic-offset: 8 -*- |
/* -*- c-basic-offset: 8 -*- |
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rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
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Protocol services - ISO layer |
Protocol services - ISO layer |
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Copyright (C) Matthew Chapman 1999-2002 |
Copyright (C) Matthew Chapman 1999-2005 |
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This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
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/* Receive a message on the ISO layer, return code */ |
/* Receive a message on the ISO layer, return code */ |
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static STREAM |
static STREAM |
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iso_recv_msg(uint8 * code) |
iso_recv_msg(uint8 * code, uint8 * rdpver) |
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{ |
{ |
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STREAM s; |
STREAM s; |
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uint16 length; |
uint16 length; |
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uint8 version; |
uint8 version; |
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BOOL shortform = False; // Shut the compiler up. |
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next_packet: |
s = tcp_recv(NULL, 4); |
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s = tcp_recv(4); |
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if (s == NULL) |
if (s == NULL) |
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return NULL; |
return NULL; |
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in_uint8(s, version); |
in_uint8(s, version); |
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switch (version & 3) |
if (rdpver != NULL) |
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*rdpver = version; |
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if (version == 3) |
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{ |
{ |
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case 0: |
in_uint8s(s, 1); /* pad */ |
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in_uint8(s, length); |
in_uint16_be(s, length); |
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if (length & 0x80) |
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{ |
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length &= ~0x80; |
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next_be(s, length); |
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shortform = False; |
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} |
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else |
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{ |
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shortform = True; |
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} |
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break; |
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case 3: |
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in_uint8s(s, 1); /* pad */ |
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in_uint16_be(s, length); |
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break; |
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default: |
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error("TPKT v%d\n", version); |
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return NULL; |
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} |
} |
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else |
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s = tcp_recv(length - 4); |
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if (s == NULL) |
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return NULL; |
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if ((version & 3) == 0) |
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{ |
{ |
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rdp5_process(s, version & 0x80, shortform); |
in_uint8(s, length); |
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goto next_packet; |
if (length & 0x80) |
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{ |
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length &= ~0x80; |
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next_be(s, length); |
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} |
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} |
} |
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s = tcp_recv(s, length - 4); |
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if (s == NULL) |
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return NULL; |
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if (version != 3) |
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return s; |
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in_uint8s(s, 1); /* hdrlen */ |
in_uint8s(s, 1); /* hdrlen */ |
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in_uint8(s, *code); |
in_uint8(s, *code); |
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if (*code == ISO_PDU_DT) |
if (*code == ISO_PDU_DT) |
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{ |
{ |
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in_uint8s(s, 1); /* eot */ |
in_uint8s(s, 1); /* eot */ |
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return s; |
return s; |
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} |
} |
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in_uint8s(s, 5); /* dst_ref, src_ref, class */ |
in_uint8s(s, 5); /* dst_ref, src_ref, class */ |
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return s; |
return s; |
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} |
} |
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/* Receive ISO transport data packet */ |
/* Receive ISO transport data packet */ |
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STREAM |
STREAM |
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iso_recv(void) |
iso_recv(uint8 * rdpver) |
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{ |
{ |
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STREAM s; |
STREAM s; |
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uint8 code; |
uint8 code = 0; |
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s = iso_recv_msg(&code); |
s = iso_recv_msg(&code, rdpver); |
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if (s == NULL) |
if (s == NULL) |
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return NULL; |
return NULL; |
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if (rdpver != NULL) |
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if (*rdpver != 3) |
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return s; |
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if (code != ISO_PDU_DT) |
if (code != ISO_PDU_DT) |
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{ |
{ |
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error("expected DT, got 0x%x\n", code); |
error("expected DT, got 0x%x\n", code); |
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return NULL; |
return NULL; |
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} |
} |
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return s; |
return s; |
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} |
} |
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BOOL |
BOOL |
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iso_connect(char *server, char *username) |
iso_connect(char *server, char *username) |
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{ |
{ |
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uint8 code; |
uint8 code = 0; |
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if (!tcp_connect(server)) |
if (!tcp_connect(server)) |
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return False; |
return False; |
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iso_send_connection_request(username); |
iso_send_connection_request(username); |
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if (iso_recv_msg(&code) == NULL) |
if (iso_recv_msg(&code, NULL) == NULL) |
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return False; |
return False; |
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if (code != ISO_PDU_CC) |
if (code != ISO_PDU_CC) |