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 | * |
80 | * Also places the canonical host name into `realhost'. |
81 | */ |
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82 | static char *rlogin_init(char *host, int port, char **realhost) |
83 | { |
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84 | static struct plug_function_table fn_table = { |
85 | rlogin_closing, |
86 | rlogin_receive |
87 | }, *fn_table_ptr = &fn_table; |
88 | |
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89 | SockAddr addr; |
90 | char *err; |
91 | |
92 | /* |
93 | * Try to find host. |
94 | */ |
95 | addr = sk_namelookup(host, realhost); |
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96 | if ((err = sk_addr_error(addr))) |
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97 | return err; |
98 | |
99 | if (port < 0) |
100 | port = 513; /* default rlogin port */ |
101 | |
102 | /* |
103 | * Open socket. |
104 | */ |
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105 | s = sk_new(addr, port, 1, 0, &fn_table_ptr); |
32874aea |
106 | if ((err = sk_socket_error(s))) |
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107 | return err; |
108 | |
109 | sk_addr_free(addr); |
110 | |
111 | /* |
112 | * Send local username, remote username, terminal/speed |
113 | */ |
114 | |
115 | { |
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116 | char z = 0; |
117 | char *p; |
118 | sk_write(s, &z, 1); |
119 | sk_write(s, cfg.localusername, strlen(cfg.localusername)); |
120 | sk_write(s, &z, 1); |
121 | sk_write(s, cfg.username, strlen(cfg.username)); |
122 | sk_write(s, &z, 1); |
123 | sk_write(s, cfg.termtype, strlen(cfg.termtype)); |
124 | sk_write(s, "/", 1); |
125 | for (p = cfg.termspeed; isdigit(*p); p++); |
126 | sk_write(s, cfg.termspeed, p - cfg.termspeed); |
127 | sk_write(s, &z, 1); |
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128 | } |
129 | |
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130 | return NULL; |
131 | } |
132 | |
133 | /* |
134 | * Called to send data down the rlogin connection. |
135 | */ |
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136 | static void rlogin_send(char *buf, int len) |
137 | { |
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138 | |
139 | if (s == NULL) |
140 | return; |
141 | |
142 | sk_write(s, buf, len); |
143 | } |
144 | |
145 | /* |
146 | * Called to set the size of the window |
147 | */ |
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148 | static void rlogin_size(void) |
149 | { |
e418595a |
150 | char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 }; |
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151 | |
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152 | b[6] = cols >> 8; |
153 | b[7] = cols & 0xFF; |
154 | b[4] = rows >> 8; |
155 | b[5] = rows & 0xFF; |
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156 | sk_write(s, b, 12); |
157 | return; |
158 | } |
159 | |
160 | /* |
161 | * Send rlogin special codes. |
162 | */ |
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163 | static void rlogin_special(Telnet_Special code) |
164 | { |
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165 | /* Do nothing! */ |
166 | return; |
167 | } |
168 | |
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169 | static Socket rlogin_socket(void) |
170 | { |
171 | return s; |
172 | } |
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173 | |
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174 | static int rlogin_sendok(void) |
175 | { |
176 | return 1; |
177 | } |
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178 | |
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179 | static int rlogin_ldisc(int option) |
180 | { |
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181 | return 0; |
182 | } |
183 | |
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184 | Backend rlogin_backend = { |
185 | rlogin_init, |
186 | rlogin_send, |
187 | rlogin_size, |
188 | rlogin_special, |
189 | rlogin_socket, |
190 | rlogin_sendok, |
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191 | rlogin_ldisc, |
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192 | 1 |
193 | }; |