c91409da |
1 | #include <windows.h> |
2 | #include <stdio.h> |
3 | #include <stdlib.h> |
b6c680d4 |
4 | #include <ctype.h> |
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5 | |
6 | #include "putty.h" |
7 | |
8 | #ifndef FALSE |
9 | #define FALSE 0 |
10 | #endif |
11 | #ifndef TRUE |
12 | #define TRUE 1 |
13 | #endif |
14 | |
15 | static Socket s = NULL; |
16 | |
17 | static void rlogin_size(void); |
18 | |
19 | static int sb_opt, sb_len; |
20 | static char *sb_buf = NULL; |
21 | static int sb_size = 0; |
22 | #define SB_DELTA 1024 |
23 | |
32874aea |
24 | static void c_write(char *buf, int len) |
25 | { |
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26 | from_backend(0, buf, len); |
27 | } |
28 | |
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29 | static int rlogin_closing(Plug plug, char *error_msg, int error_code, |
30 | int calling_back) |
31 | { |
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32 | sk_close(s); |
33 | s = NULL; |
34 | if (error_msg) { |
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35 | /* A socket error has occurred. */ |
36 | connection_fatal(error_msg); |
37 | } /* Otherwise, the remote side closed the connection normally. */ |
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38 | return 0; |
39 | } |
40 | |
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41 | static int rlogin_receive(Plug plug, int urgent, char *data, int len) |
42 | { |
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43 | if (urgent == 2) { |
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44 | char c; |
45 | |
46 | c = *data++; |
47 | len--; |
48 | if (c == '\x80') |
49 | rlogin_size(); |
50 | /* |
51 | * We should flush everything (aka Telnet SYNCH) if we see |
52 | * 0x02, and we should turn off and on _local_ flow control |
53 | * on 0x10 and 0x20 respectively. I'm not convinced it's |
54 | * worth it... |
55 | */ |
8a5fb9e3 |
56 | } else { |
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57 | /* |
58 | * Main rlogin protocol. This is really simple: the first |
59 | * byte is expected to be NULL and is ignored, and the rest |
60 | * is printed. |
61 | */ |
62 | static int firstbyte = 1; |
63 | if (firstbyte) { |
64 | if (data[0] == '\0') { |
65 | data++; |
66 | len--; |
67 | } |
68 | firstbyte = 0; |
69 | } |
70 | c_write(data, len); |
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71 | } |
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72 | return 1; |
73 | } |
74 | |
75 | /* |
76 | * Called to set up the rlogin connection. |
77 | * |
78 | * Returns an error message, or NULL on success. |
79 | * |
6e1ebb76 |
80 | * Also places the canonical host name into `realhost'. It must be |
81 | * freed by the caller. |
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82 | */ |
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83 | static char *rlogin_init(char *host, int port, char **realhost) |
84 | { |
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85 | static struct plug_function_table fn_table = { |
86 | rlogin_closing, |
87 | rlogin_receive |
88 | }, *fn_table_ptr = &fn_table; |
89 | |
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90 | SockAddr addr; |
91 | char *err; |
92 | |
93 | /* |
94 | * Try to find host. |
95 | */ |
96 | addr = sk_namelookup(host, realhost); |
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97 | if ((err = sk_addr_error(addr))) |
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98 | return err; |
99 | |
100 | if (port < 0) |
101 | port = 513; /* default rlogin port */ |
102 | |
103 | /* |
104 | * Open socket. |
105 | */ |
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106 | s = sk_new(addr, port, 1, 0, &fn_table_ptr); |
32874aea |
107 | if ((err = sk_socket_error(s))) |
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108 | return err; |
109 | |
110 | sk_addr_free(addr); |
111 | |
112 | /* |
113 | * Send local username, remote username, terminal/speed |
114 | */ |
115 | |
116 | { |
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117 | char z = 0; |
118 | char *p; |
119 | sk_write(s, &z, 1); |
120 | sk_write(s, cfg.localusername, strlen(cfg.localusername)); |
121 | sk_write(s, &z, 1); |
122 | sk_write(s, cfg.username, strlen(cfg.username)); |
123 | sk_write(s, &z, 1); |
124 | sk_write(s, cfg.termtype, strlen(cfg.termtype)); |
125 | sk_write(s, "/", 1); |
126 | for (p = cfg.termspeed; isdigit(*p); p++); |
127 | sk_write(s, cfg.termspeed, p - cfg.termspeed); |
128 | sk_write(s, &z, 1); |
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129 | } |
130 | |
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131 | return NULL; |
132 | } |
133 | |
134 | /* |
135 | * Called to send data down the rlogin connection. |
136 | */ |
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137 | static void rlogin_send(char *buf, int len) |
138 | { |
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139 | |
140 | if (s == NULL) |
141 | return; |
142 | |
143 | sk_write(s, buf, len); |
144 | } |
145 | |
146 | /* |
147 | * Called to set the size of the window |
148 | */ |
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149 | static void rlogin_size(void) |
150 | { |
e418595a |
151 | char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 }; |
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152 | |
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153 | b[6] = cols >> 8; |
154 | b[7] = cols & 0xFF; |
155 | b[4] = rows >> 8; |
156 | b[5] = rows & 0xFF; |
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157 | sk_write(s, b, 12); |
158 | return; |
159 | } |
160 | |
161 | /* |
162 | * Send rlogin special codes. |
163 | */ |
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164 | static void rlogin_special(Telnet_Special code) |
165 | { |
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166 | /* Do nothing! */ |
167 | return; |
168 | } |
169 | |
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170 | static Socket rlogin_socket(void) |
171 | { |
172 | return s; |
173 | } |
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174 | |
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175 | static int rlogin_sendok(void) |
176 | { |
177 | return 1; |
178 | } |
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179 | |
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180 | static int rlogin_ldisc(int option) |
181 | { |
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182 | return 0; |
183 | } |
184 | |
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185 | Backend rlogin_backend = { |
186 | rlogin_init, |
187 | rlogin_send, |
188 | rlogin_size, |
189 | rlogin_special, |
190 | rlogin_socket, |
191 | rlogin_sendok, |
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192 | rlogin_ldisc, |
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193 | 1 |
194 | }; |