reactos/modules/rosapps/applications/net/tsclient/rdesktop/tcp.c

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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Protocol services - TCP layer
Copyright (C) Matthew Chapman 1999-2005
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 2 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if 0 // FIXME: header mess
#include <unistd.h> /* select read write close */
#include <sys/socket.h> /* socket connect setsockopt */
#include <sys/time.h> /* timeval */
#include <netdb.h> /* gethostbyname */
#include <netinet/in.h> /* sockaddr_in */
#include <netinet/tcp.h> /* TCP_NODELAY */
#include <arpa/inet.h> /* inet_addr */
#include <errno.h> /* errno */
#endif
#include "rdesktop.h"
#include <winsock2.h>
typedef int socklen_t;
#ifndef INADDR_NONE
#define INADDR_NONE ((unsigned long) -1)
#endif
/* Initialise TCP transport data packet */
STREAM
tcp_init(RDPCLIENT * This, uint32 maxlen)
{
if (maxlen > This->tcp.out.size)
{
void * p;
p = realloc(This->tcp.out.data, maxlen);
if (p == NULL)
{
This->disconnect_reason = 262;
return NULL;
}
This->tcp.out.data = (uint8 *)p;
This->tcp.out.size = maxlen;
}
This->tcp.out.p = This->tcp.out.data;
This->tcp.out.end = This->tcp.out.data + This->tcp.out.size;
return &This->tcp.out;
}
/* Send TCP transport data packet */
BOOL
tcp_send(RDPCLIENT * This, STREAM s)
{
int length = (int)(s->end - s->data);
int total = 0;
DWORD sent;
OVERLAPPED overlapped;
memset(&overlapped, 0, sizeof(overlapped));
while (total < length)
{
WriteFile((HANDLE)This->tcp.sock, s->data + total, length - total, NULL, &overlapped);
switch(WaitForSingleObjectEx((HANDLE)This->tcp.sock, INFINITE, TRUE))
{
/* Success */
case WAIT_OBJECT_0:
break;
/* Timeout or error */
case WAIT_TIMEOUT:
default:
This->disconnect_reason = 772;
/* Aborted, must disconnect ASAP */
case WAIT_IO_COMPLETION:
CancelIo((HANDLE)This->tcp.sock);
break;
}
/* Wait for completion. We could hang here, but we shouldn't */
if(!GetOverlappedResult((HANDLE)This->tcp.sock, &overlapped, &sent, TRUE))
return False;
total += sent;
}
return True;
}
/* Receive a message on the TCP layer */
STREAM
tcp_recv(RDPCLIENT * This, STREAM s, uint32 length)
{
unsigned int new_length, end_offset, p_offset;
DWORD rcvd = 0;
if (s == NULL)
{
/* read into "new" stream */
if (length > This->tcp.in.size)
{
void * p = realloc(This->tcp.in.data, length);
if(p == NULL)
{
This->disconnect_reason = 262;
return NULL;
}
This->tcp.in.data = (uint8 *) p;
This->tcp.in.size = length;
}
This->tcp.in.end = This->tcp.in.p = This->tcp.in.data;
s = &This->tcp.in;
}
else
{
/* append to existing stream */
new_length = (unsigned int)(s->end - s->data) + length;
if (new_length > s->size)
{
void * p = realloc(s->data, new_length);
if(p == NULL)
{
This->disconnect_reason = 262;
return NULL;
}
p_offset = (unsigned int)(s->p - s->data);
end_offset = (unsigned int)(s->end - s->data);
s->data = (uint8 *) p;
s->size = new_length;
s->p = s->data + p_offset;
s->end = s->data + end_offset;
}
}
while (length > 0)
{
OVERLAPPED overlapped;
memset(&overlapped, 0, sizeof(overlapped));
if (!ui_select(This, This->tcp.sock))
/* User quit */
return NULL;
ReadFile((HANDLE)This->tcp.sock, s->end, length, NULL, &overlapped);
switch(WaitForSingleObjectEx((HANDLE)This->tcp.sock, INFINITE, TRUE))
{
/* Success */
case WAIT_OBJECT_0:
break;
/* Timeout or error */
case WAIT_TIMEOUT:
default:
This->disconnect_reason = 1028;
/* Aborted, must disconnect ASAP */
case WAIT_IO_COMPLETION:
CancelIo((HANDLE)This->tcp.sock);
break;
}
/* Wait for completion. We could hang here, but we shouldn't */
if(!GetOverlappedResult((HANDLE)This->tcp.sock, &overlapped, &rcvd, TRUE))
return False;
if (rcvd == 0)
{
error("Connection closed\n");
This->disconnect_reason = 2308;
return NULL;
}
s->end += rcvd;
length -= rcvd;
}
return s;
}
/* Establish a connection on the TCP layer */
BOOL
tcp_connect(RDPCLIENT * This, char *server)
{
int true_value = 1;
#ifdef IPv6
int n;
struct addrinfo hints, *res, *ressave;
char tcp_port_rdp_s[10];
snprintf(tcp_port_rdp_s, 10, "%d", This->tcp_port_rdp);
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if ((n = getaddrinfo(server, tcp_port_rdp_s, &hints, &res)))
{
error("getaddrinfo: %s\n", gai_strerror(n));
return False;
}
ressave = res;
This->tcp.sock = -1;
while (res)
{
This->tcp.sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (!(This->tcp.sock < 0))
{
if (connect(This->tcp.sock, res->ai_addr, res->ai_addrlen) == 0)
break;
close(This->tcp.sock);
This->tcp.sock = -1;
}
res = res->ai_next;
}
freeaddrinfo(ressave);
if (This->tcp.sock == -1)
{
error("%s: unable to connect\n", server);
return False;
}
#else /* no IPv6 support */
struct hostent *nslookup;
struct sockaddr_in servaddr;
if ((nslookup = gethostbyname(server)) != NULL)
{
memcpy(&servaddr.sin_addr, nslookup->h_addr, sizeof(servaddr.sin_addr));
}
else if ((servaddr.sin_addr.s_addr = inet_addr(server)) == INADDR_NONE)
{
error("%s: unable to resolve host\n", server);
This->disconnect_reason = 260;
return False;
}
if ((This->tcp.sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
// error("socket: %s\n", strerror(errno)); // EOF
return False;
}
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(This->tcp_port_rdp);
// TODO: apply connection timeout here
if (connect(This->tcp.sock, (struct sockaddr *) &servaddr, sizeof(struct sockaddr)) < 0)
{
// error("connect: %s\n", strerror(errno)); // EOF
This->disconnect_reason = 516;
closesocket(This->tcp.sock);
return False;
}
#endif /* IPv6 */
setsockopt(This->tcp.sock, IPPROTO_TCP, TCP_NODELAY, (void *) &true_value, sizeof(true_value));
This->tcp.in.size = 4096;
This->tcp.in.data = (uint8 *) malloc(This->tcp.in.size);
if(This->tcp.in.data == NULL)
{
This->disconnect_reason = 262;
return False;
}
This->tcp.out.size = 4096;
This->tcp.out.data = (uint8 *) malloc(This->tcp.out.size);
if(This->tcp.out.data == NULL)
{
This->disconnect_reason = 262;
return False;
}
return True;
}
/* Disconnect on the TCP layer */
BOOL
tcp_disconnect(RDPCLIENT * This)
{
closesocket(This->tcp.sock);
return True;
}
wchar_t *
tcp_get_address(RDPCLIENT * This)
{
#if 0
static char ipaddr[32];
struct sockaddr_in sockaddr;
socklen_t len = sizeof(sockaddr);
if (getsockname(This->tcp.sock, (struct sockaddr *) &sockaddr, &len) == 0)
{
unsigned char *ip = (unsigned char *) &sockaddr.sin_addr;
sprintf(ipaddr, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
}
else
strcpy(ipaddr, "127.0.0.1");
return ipaddr;
#endif
return NULL; // TODO
}
/* reset the state of the tcp layer */
/* Support for Session Directory */
void
tcp_reset_state(RDPCLIENT * This)
{
This->tcp.sock = -1; /* reset socket */
/* Clear the incoming stream */
if (This->tcp.in.data != NULL)
free(This->tcp.in.data);
This->tcp.in.p = NULL;
This->tcp.in.end = NULL;
This->tcp.in.data = NULL;
This->tcp.in.size = 0;
This->tcp.in.iso_hdr = NULL;
This->tcp.in.mcs_hdr = NULL;
This->tcp.in.sec_hdr = NULL;
This->tcp.in.rdp_hdr = NULL;
This->tcp.in.channel_hdr = NULL;
/* Clear the outgoing stream */
if (This->tcp.out.data != NULL)
free(This->tcp.out.data);
This->tcp.out.p = NULL;
This->tcp.out.end = NULL;
This->tcp.out.data = NULL;
This->tcp.out.size = 0;
This->tcp.out.iso_hdr = NULL;
This->tcp.out.mcs_hdr = NULL;
This->tcp.out.sec_hdr = NULL;
This->tcp.out.rdp_hdr = NULL;
This->tcp.out.channel_hdr = NULL;
}