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comparison cli-chansession.c @ 39:0883c0906870

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tty raw mode support works mostly adding cli-{chansession,runopts}.c which were missing
author Matt Johnston <matt@ucc.asn.au>
date Fri, 30 Jul 2004 12:29:53 +0000
parents
children b4874d772210
comparison
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38:5c6f9d27ea1c 39:0883c0906870
1 #include "includes.h"
2 #include "packet.h"
3 #include "buffer.h"
4 #include "session.h"
5 #include "dbutil.h"
6 #include "channel.h"
7 #include "ssh.h"
8 #include "runopts.h"
9
10 static void cli_closechansess(struct Channel *channel);
11 static int cli_initchansess(struct Channel *channel);
12
13 static void start_channel_request(struct Channel *channel, unsigned char *type);
14
15 static void send_chansess_pty_req(struct Channel *channel);
16 static void send_chansess_shell_req(struct Channel *channel);
17
18 static void cli_tty_setup();
19 static void cli_tty_cleanup();
20
21 static const struct ChanType clichansess = {
22 0, /* sepfds */
23 "session", /* name */
24 cli_initchansess, /* inithandler */
25 NULL, /* checkclosehandler */
26 NULL, /* reqhandler */
27 cli_closechansess, /* closehandler */
28 };
29
30 /* If the main session goes, we close it up */
31 static void cli_closechansess(struct Channel *channel) {
32
33 /* This channel hasn't gone yet, so we have > 1 */
34 if (ses.chancount > 1) {
35 dropbear_log(LOG_INFO, "Waiting for other channels to close...");
36 }
37
38 cli_tty_cleanup(); /* Restore tty modes etc */
39
40 }
41
42 static void start_channel_request(struct Channel *channel,
43 unsigned char *type) {
44
45 CHECKCLEARTOWRITE();
46 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
47 buf_putint(ses.writepayload, channel->remotechan);
48
49 buf_putstring(ses.writepayload, type, strlen(type));
50
51 }
52
53
54 /* Taken from OpenSSH's sshtty.c:
55 * RCSID("OpenBSD: sshtty.c,v 1.5 2003/09/19 17:43:35 markus Exp "); */
56 static void cli_tty_setup() {
57
58 struct termios tio;
59
60 TRACE(("enter cli_pty_setup"));
61
62 if (cli_ses.tty_raw_mode == 1) {
63 TRACE(("leave cli_tty_setup: already in raw mode!"));
64 return;
65 }
66
67 if (tcgetattr(STDIN_FILENO, &tio) == -1) {
68 dropbear_exit("Failed to set raw TTY mode");
69 }
70
71 /* make a copy */
72 cli_ses.saved_tio = tio;
73
74 tio.c_iflag |= IGNPAR;
75 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
76 #ifdef IUCLC
77 tio.c_iflag &= ~IUCLC;
78 #endif
79 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
80 #ifdef IEXTEN
81 tio.c_lflag &= ~IEXTEN;
82 #endif
83 tio.c_oflag &= ~OPOST;
84 tio.c_cc[VMIN] = 1;
85 tio.c_cc[VTIME] = 0;
86 if (tcsetattr(STDIN_FILENO, TCSADRAIN, &tio) == -1) {
87 dropbear_exit("Failed to set raw TTY mode");
88 }
89
90 cli_ses.tty_raw_mode = 1;
91 TRACE(("leave cli_tty_setup"));
92 }
93
94 static void cli_tty_cleanup() {
95
96 TRACE(("enter cli_tty_cleanup"));
97
98 if (cli_ses.tty_raw_mode == 0) {
99 TRACE(("leave cli_tty_cleanup: not in raw mode"));
100 }
101
102 if (tcsetattr(STDIN_FILENO, TCSADRAIN, &cli_ses.saved_tio) == -1) {
103 dropbear_log(LOG_WARNING, "Failed restoring TTY");
104 } else {
105 cli_ses.tty_raw_mode = 0;
106 }
107
108 TRACE(("leave cli_tty_cleanup"));
109 }
110
111 static void send_chansess_pty_req(struct Channel *channel) {
112
113 unsigned char* termmodes = "\0";
114 unsigned char* term = NULL;
115 int termc = 80, termr = 25, termw = 0, termh = 0; /* XXX TODO matt */
116
117 TRACE(("enter send_chansess_pty_req"));
118 start_channel_request(channel, "pty-req");
119
120 term = getenv("TERM");
121 if (term == NULL) {
122 term = "vt100";
123 }
124
125 /* XXX TODO */
126 buf_putbyte(ses.writepayload, 0); /* Don't want replies */
127 buf_putstring(ses.writepayload, term, strlen(term));
128 buf_putint(ses.writepayload, termc); /* Cols */
129 buf_putint(ses.writepayload, termr); /* Rows */
130 buf_putint(ses.writepayload, termw); /* Width */
131 buf_putint(ses.writepayload, termh); /* Height */
132
133 buf_putstring(ses.writepayload, termmodes, 1); /* XXX TODO */
134 //m_free(termmodes);
135
136 encrypt_packet();
137 TRACE(("leave send_chansess_pty_req"));
138 }
139
140 static void send_chansess_shell_req(struct Channel *channel) {
141
142 unsigned char* reqtype = NULL;
143
144 TRACE(("enter send_chansess_shell_req"));
145
146 if (cli_opts.cmd) {
147 reqtype = "exec";
148 } else {
149 reqtype = "shell";
150 }
151
152 start_channel_request(channel, reqtype);
153
154 /* XXX TODO */
155 buf_putbyte(ses.writepayload, 0); /* Don't want replies */
156 if (cli_opts.cmd) {
157 buf_putstring(ses.writepayload, cli_opts.cmd, strlen(cli_opts.cmd));
158 }
159
160 encrypt_packet();
161 TRACE(("leave send_chansess_shell_req"));
162 }
163
164 static int cli_initchansess(struct Channel *channel) {
165
166 channel->infd = STDOUT_FILENO;
167 //channel->outfd = STDIN_FILENO;
168 //channel->errfd = STDERR_FILENO;
169
170 if (cli_opts.wantpty) {
171 send_chansess_pty_req(channel);
172 }
173
174 cli_opts.cmd = "df";
175 send_chansess_shell_req(channel);
176
177 if (cli_opts.wantpty) {
178 cli_tty_setup();
179 }
180
181 return 0; /* Success */
182
183 }
184
185
186 void cli_send_chansess_request() {
187
188 TRACE(("enter cli_send_chansess_request"));
189 if (send_msg_channel_open_init(STDIN_FILENO, &clichansess)
190 == DROPBEAR_FAILURE) {
191 dropbear_exit("Couldn't open initial channel");
192 }
193
194 /* No special channel request data */
195 encrypt_packet();
196 TRACE(("leave cli_send_chansess_request"));
197
198 }