2 rdesktop: A Remote Desktop Protocol client.
3 Protocol services - TCP layer
4 Copyright (C) Matthew Chapman 1999-2002
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <unistd.h> /* select read write close */
22 #include <sys/socket.h> /* socket connect setsockopt */
23 #include <sys/time.h> /* timeval */
24 #include <netdb.h> /* gethostbyname */
25 #include <netinet/in.h> /* sockaddr_in */
26 #include <netinet/tcp.h> /* TCP_NODELAY */
27 #include <arpa/inet.h> /* inet_addr */
28 #include <errno.h> /* errno */
32 #define INADDR_NONE ((unsigned long) -1)
36 static struct stream in;
37 static struct stream out;
38 extern int tcp_port_rdp;
40 /* Initialise TCP transport data packet */
42 tcp_init(uint32 maxlen)
44 if (maxlen > out.size)
46 out.data = (uint8 *) xrealloc(out.data, maxlen);
51 out.end = out.data + out.size;
55 /* Send TCP transport data packet */
59 int length = s->end - s->data;
62 while (total < length)
64 sent = send(sock, s->data + total, length - total, 0);
67 error("send: %s\n", strerror(errno));
75 /* Receive a message on the TCP layer */
77 tcp_recv(STREAM s, uint32 length)
79 unsigned int new_length, end_offset, p_offset;
84 /* read into "new" stream */
87 in.data = (uint8 *) xrealloc(in.data, length);
90 in.end = in.p = in.data;
95 /* append to existing stream */
96 new_length = (s->end - s->data) + length;
97 if (new_length > s->size)
99 p_offset = s->p - s->data;
100 end_offset = s->end - s->data;
101 s->data = (uint8 *) xrealloc(s->data, new_length);
102 s->size = new_length;
103 s->p = s->data + p_offset;
104 s->end = s->data + end_offset;
111 if (!ui_select(sock))
116 rcvd = recv(sock, s->end, length, 0);
119 error("recv: %s\n", strerror(errno));
124 error("Connection closed\n");
135 /* Establish a connection on the TCP layer */
137 tcp_recv_connect(int server_sock)
139 struct sockaddr_in sin;
140 unsigned true_value = 1;
141 socklen_t len = sizeof(sin);
142 sock = accept(server_sock, (struct sockaddr *)&sin, &len);
149 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void *) &true_value, sizeof(true_value));
152 in.data = (uint8 *) xmalloc(in.size);
155 out.data = (uint8 *) xmalloc(out.size);
160 /* Disconnect on the TCP layer */