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