c91409da |
1 | #include <windows.h> |
2 | #include <stdio.h> |
3 | #include <stdlib.h> |
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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 | |
24 | static void c_write (char *buf, int len) { |
25 | from_backend(0, buf, len); |
26 | } |
27 | |
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28 | static int rlogin_closing (Plug plug, char *error_msg, int error_code, int calling_back) { |
29 | sk_close(s); |
30 | s = NULL; |
31 | if (error_msg) { |
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32 | /* A socket error has occurred. */ |
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33 | connection_fatal (error_msg); |
34 | } /* Otherwise, the remote side closed the connection normally. */ |
35 | return 0; |
36 | } |
37 | |
38 | static int rlogin_receive (Plug plug, int urgent, char *data, int len) { |
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39 | if (urgent == 2) { |
40 | char c; |
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41 | |
42 | c = *data++; len--; |
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43 | if (c == '\x80') |
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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 | */ |
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51 | } else { |
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 | * |
75 | * Also places the canonical host name into `realhost'. |
76 | */ |
77 | static char *rlogin_init (char *host, int port, char **realhost) { |
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78 | static struct plug_function_table fn_table = { |
79 | rlogin_closing, |
80 | rlogin_receive |
81 | }, *fn_table_ptr = &fn_table; |
82 | |
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83 | SockAddr addr; |
84 | char *err; |
85 | |
86 | /* |
87 | * Try to find host. |
88 | */ |
89 | addr = sk_namelookup(host, realhost); |
90 | if ( (err = sk_addr_error(addr)) ) |
91 | return err; |
92 | |
93 | if (port < 0) |
94 | port = 513; /* default rlogin port */ |
95 | |
96 | /* |
97 | * Open socket. |
98 | */ |
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99 | s = sk_new(addr, port, 1, 0, &fn_table_ptr); |
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100 | if ( (err = sk_socket_error(s)) ) |
101 | return err; |
102 | |
103 | sk_addr_free(addr); |
104 | |
105 | /* |
106 | * Send local username, remote username, terminal/speed |
107 | */ |
108 | |
109 | { |
110 | char z = 0; |
111 | char *p; |
112 | sk_write(s, &z, 1); |
113 | sk_write(s, cfg.localusername, strlen(cfg.localusername)); |
114 | sk_write(s, &z, 1); |
115 | sk_write(s, cfg.username, strlen(cfg.username)); |
116 | sk_write(s, &z, 1); |
117 | sk_write(s, cfg.termtype, strlen(cfg.termtype)); |
118 | sk_write(s, "/", 1); |
119 | for(p = cfg.termspeed; isdigit(*p); p++); |
120 | sk_write(s, cfg.termspeed, p - cfg.termspeed); |
121 | sk_write(s, &z, 1); |
122 | } |
123 | |
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124 | return NULL; |
125 | } |
126 | |
127 | /* |
128 | * Called to send data down the rlogin connection. |
129 | */ |
130 | static void rlogin_send (char *buf, int len) { |
131 | |
132 | if (s == NULL) |
133 | return; |
134 | |
135 | sk_write(s, buf, len); |
136 | } |
137 | |
138 | /* |
139 | * Called to set the size of the window |
140 | */ |
141 | static void rlogin_size(void) { |
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142 | char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 }; |
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143 | |
144 | b[6] = cols >> 8; b[7] = cols & 0xFF; |
145 | b[4] = rows >> 8; b[5] = rows & 0xFF; |
146 | sk_write(s, b, 12); |
147 | return; |
148 | } |
149 | |
150 | /* |
151 | * Send rlogin special codes. |
152 | */ |
153 | static void rlogin_special (Telnet_Special code) { |
154 | /* Do nothing! */ |
155 | return; |
156 | } |
157 | |
158 | static Socket rlogin_socket(void) { return s; } |
159 | |
160 | static int rlogin_sendok(void) { return 1; } |
161 | |
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162 | static int rlogin_ldisc(int option) { |
163 | return 0; |
164 | } |
165 | |
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166 | Backend rlogin_backend = { |
167 | rlogin_init, |
168 | rlogin_send, |
169 | rlogin_size, |
170 | rlogin_special, |
171 | rlogin_socket, |
172 | rlogin_sendok, |
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173 | rlogin_ldisc, |
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174 | 1 |
175 | }; |