1: /*************************************************************************
2: * (C) 2011 AITNET - Sofia/Bulgaria - <office@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
6: * $Id: client2.c,v 1.1.1.1.2.4 2011/10/13 16:08:52 misho Exp $
7: *
8: *************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #include "global.h"
47:
48:
49: static int
50: SetRemoteWinz(int h, struct ether_addr *ea, u_char *buf, int buflen)
51: {
52: u_short *pos = (u_short*) buf;
53: struct winsize ws;
54:
55: FTRACE(5);
56:
57: memset(buf, 0, buflen);
58: if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1) {
59: printf("Error:: ioctl(winsize) #%d - %s\n", errno, strerror(errno));
60: return -1;
61: }
62:
63: pos[0] = htons(ws.ws_row);
64: pos[1] = htons(ws.ws_col);
65: pos[2] = htons(ws.ws_xpixel);
66: pos[3] = htons(ws.ws_ypixel);
67: if (pktSend(h, 0, ANSH_FLG_WINZ, Crypted, buf, sizeof ws, ea) == -1)
68: return -1;
69:
70: return 0;
71: }
72:
73: int
74: ConnectL2(int h, struct ether_addr *ea, int len)
75: {
76: fd_set rfd;
77: struct ether_header eth;
78: struct timeval tv = { 10, 0 };
79: struct termios otio;
80: int rlen, ret = 0;
81: char flg, nl = 0;
82: u_char *buf, *str;
83: u_int s, Seq = 0;
84:
85: FTRACE(3);
86:
87: if (!(buf = malloc(len))) {
88: printf("Error:: no enough memory #%d - %s\n", errno, strerror(errno));
89: return -1;
90: }
91:
92: if (SetRemoteWinz(h, ea, buf, len) == -1) {
93: free(buf);
94: return -1;
95: }
96:
97: ioSetRAWMode(STDIN_FILENO, &otio);
98:
99: while (!Kill) {
100: FD_ZERO(&rfd);
101: FD_SET(h, &rfd);
102: FD_SET(STDIN_FILENO, &rfd);
103: if (select(h + 1, &rfd, NULL, NULL, (Timeout ? &tv : NULL)) < 1) {
104: ret = -1;
105: break;
106: }
107: if (FD_ISSET(h, &rfd)) {
108: rlen = len;
109: memset(buf, 0, rlen);
110: flg = pktRecv(h, &s, &Crypted, buf, &rlen, ð);
111: if (flg == ANSH_FLG_ERR) {
112: ret = -1;
113: break;
114: }
115: if (ntohs(eth.ether_type) != ANSH_ID) {
116: VERB(4) LOG("different service id %d / %d\n", eth.ether_type, ANSH_ID);
117: continue;
118: }
119: if (flg == ANSH_FLG_EOF) {
120: VERB(3) LOG("receive EOF going down.\n");
121: Kill++;
122: }
123: if (flg != ANSH_FLG_OK)
124: continue;
125: if (s <= Seq)
126: continue;
127: else if (s > (Seq + 1))
128: VERB(1) LOG("LOST PACKET(s) detect: %d; received seq=%d - %d",
129: s - (Seq + 1), s, Seq);
130: Seq = s;
131:
132: if (Crypted) {
133: str = cryptBuffer(buf, rlen, Crypted);
134: if (str) {
135: memcpy(buf, str, rlen);
136: free(str);
137: }
138: }
139:
140: rlen = write(STDOUT_FILENO, buf, rlen);
141: if (rlen == -1) {
142: printf("Error:: write(stdout) #%d - %s\n", errno, strerror(errno));
143: ret = -1;
144: break;
145: }
146: } else {
147: memset(buf, 0, len);
148: rlen = read(STDIN_FILENO, buf, len);
149: if (rlen == -1) {
150: printf("Error:: read(stdin) #%d - %s\n", errno, strerror(errno));
151: ret = -1;
152: break;
153: }
154:
155: /* local command handling */
156: if (rlen) {
157: /* execute local command */
158: if (nl == 2) {
159: switch (*buf) {
160: case '.':
161: Kill++;
162: printf("\n");
163: VERB(1) LOG("Exit from client\n");
164: continue;
165: case '~':
166: default:
167: nl ^= nl;
168: /* send buffer, unknown command */
169: break;
170: }
171: }
172: /* skip buffer and wait for local command */
173: if (nl == 1 && *buf == '~') {
174: nl++;
175: continue;
176: }
177: /* send buffer if detect NL */
178: if (*buf == 0xa || *buf == 0xd)
179: nl = 1;
180: else
181: nl ^= nl;
182: } else
183: nl ^= nl;
184:
185: if (Crypted) {
186: str = cryptBuffer(buf, rlen, Crypted);
187: if (str) {
188: memcpy(buf, str, rlen);
189: free(str);
190: }
191: }
192:
193: rlen = pktSend(h, ++Seq, ANSH_FLG_CPOUT, Crypted, buf, rlen, ea);
194: if (rlen == ANSH_FLG_ERR) {
195: ret = -1;
196: break;
197: }
198: }
199: }
200:
201: ioRestoreMode(STDIN_FILENO, otio);
202: free(buf);
203: return ret;
204: }
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