5514330916
git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@191 423420c4-83ab-492f-b58f-81f9feb106b5
154 lines
3.2 KiB
C
154 lines
3.2 KiB
C
/*
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rdesktop: A Remote Desktop Protocol client.
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Protocol services - TCP layer
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Copyright (C) Matthew Chapman 1999-2001
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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
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <unistd.h> /* select read write close */
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#include <sys/socket.h> /* socket connect setsockopt */
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#include <sys/time.h> /* timeval */
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#include <netdb.h> /* gethostbyname */
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#include <netinet/in.h> /* sockaddr_in */
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#include <netinet/tcp.h> /* TCP_NODELAY */
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#include <arpa/inet.h> /* inet_addr */
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#include <errno.h> /* errno */
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#include "rdesktop.h"
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static int sock;
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static struct stream in;
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static struct stream out;
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extern int tcp_port_rdp;
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/* Initialise TCP transport data packet */
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STREAM
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tcp_init(int maxlen)
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{
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if (maxlen > out.size)
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{
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out.data = xrealloc(out.data, maxlen);
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out.size = maxlen;
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}
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out.p = out.data;
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out.end = out.data + out.size;
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return &out;
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}
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/* Send TCP transport data packet */
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void
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tcp_send(STREAM s)
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{
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int length = s->end - s->data;
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int sent, total = 0;
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while (total < length)
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{
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sent = send(sock, s->data + total, length - total, 0);
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if (sent <= 0)
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{
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error("send: %s\n", strerror(errno));
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return;
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}
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total += sent;
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}
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}
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/* Receive a message on the TCP layer */
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STREAM
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tcp_recv(int length)
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{
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int rcvd = 0;
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if (length > in.size)
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{
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in.data = xrealloc(in.data, length);
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in.size = length;
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}
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in.end = in.p = in.data;
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while (length > 0)
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{
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ui_select(sock);
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rcvd = recv(sock, in.end, length, 0);
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if (rcvd == -1)
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{
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error("recv: %s\n", strerror(errno));
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return NULL;
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}
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in.end += rcvd;
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length -= rcvd;
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}
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return ∈
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}
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/* Establish a connection on the TCP layer */
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BOOL
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tcp_connect(char *server)
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{
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struct hostent *nslookup;
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struct sockaddr_in servaddr;
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int true = 1;
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if ((nslookup = gethostbyname(server)) != NULL)
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{
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memcpy(&servaddr.sin_addr, nslookup->h_addr, sizeof(servaddr.sin_addr));
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}
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else if (!(servaddr.sin_addr.s_addr = inet_addr(server)))
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{
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error("%s: unable to resolve host\n", server);
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return False;
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}
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
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{
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error("socket: %s\n", strerror(errno));
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return False;
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}
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servaddr.sin_family = AF_INET;
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servaddr.sin_port = htons(tcp_port_rdp);
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if (connect(sock, (struct sockaddr *) &servaddr, sizeof(struct sockaddr)) < 0)
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{
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error("connect: %s\n", strerror(errno));
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close(sock);
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return False;
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}
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setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void *) &true, sizeof(true));
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in.size = 4096;
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in.data = xmalloc(in.size);
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out.size = 4096;
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out.data = xmalloc(out.size);
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return True;
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}
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/* Disconnect on the TCP layer */
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void
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tcp_disconnect(void)
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{
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close(sock);
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}
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