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_receive (Socket skt, int urgent, char *data, int len) { |
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29 | if (urgent==3) { |
30 | /* A socket error has occurred. */ |
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31 | sk_close(s); |
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32 | s = NULL; |
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33 | connection_fatal(data); |
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34 | return 0; |
35 | } else if (!len) { |
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36 | /* Connection has closed. */ |
37 | sk_close(s); |
38 | s = NULL; |
39 | return 0; |
40 | } |
41 | if (urgent == 2) { |
42 | char c; |
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43 | |
44 | c = *data++; len--; |
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45 | if (c == '\x80') |
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46 | rlogin_size(); |
47 | /* |
48 | * We should flush everything (aka Telnet SYNCH) if we see |
49 | * 0x02, and we should turn off and on _local_ flow control |
50 | * on 0x10 and 0x20 respectively. I'm not convinced it's |
51 | * worth it... |
52 | */ |
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53 | } else { |
54 | /* |
55 | * Main rlogin protocol. This is really simple: the first |
56 | * byte is expected to be NULL and is ignored, and the rest |
57 | * is printed. |
58 | */ |
59 | static int firstbyte = 1; |
60 | if (firstbyte) { |
61 | if (data[0] == '\0') { |
62 | data++; |
63 | len--; |
64 | } |
65 | firstbyte = 0; |
66 | } |
67 | c_write(data, len); |
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68 | } |
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69 | return 1; |
70 | } |
71 | |
72 | /* |
73 | * Called to set up the rlogin connection. |
74 | * |
75 | * Returns an error message, or NULL on success. |
76 | * |
77 | * Also places the canonical host name into `realhost'. |
78 | */ |
79 | static char *rlogin_init (char *host, int port, char **realhost) { |
80 | SockAddr addr; |
81 | char *err; |
82 | |
83 | /* |
84 | * Try to find host. |
85 | */ |
86 | addr = sk_namelookup(host, realhost); |
87 | if ( (err = sk_addr_error(addr)) ) |
88 | return err; |
89 | |
90 | if (port < 0) |
91 | port = 513; /* default rlogin port */ |
92 | |
93 | /* |
94 | * Open socket. |
95 | */ |
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96 | s = sk_new(addr, port, 1, 0, rlogin_receive); |
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97 | if ( (err = sk_socket_error(s)) ) |
98 | return err; |
99 | |
100 | sk_addr_free(addr); |
101 | |
102 | /* |
103 | * Send local username, remote username, terminal/speed |
104 | */ |
105 | |
106 | { |
107 | char z = 0; |
108 | char *p; |
109 | sk_write(s, &z, 1); |
110 | sk_write(s, cfg.localusername, strlen(cfg.localusername)); |
111 | sk_write(s, &z, 1); |
112 | sk_write(s, cfg.username, strlen(cfg.username)); |
113 | sk_write(s, &z, 1); |
114 | sk_write(s, cfg.termtype, strlen(cfg.termtype)); |
115 | sk_write(s, "/", 1); |
116 | for(p = cfg.termspeed; isdigit(*p); p++); |
117 | sk_write(s, cfg.termspeed, p - cfg.termspeed); |
118 | sk_write(s, &z, 1); |
119 | } |
120 | |
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121 | return NULL; |
122 | } |
123 | |
124 | /* |
125 | * Called to send data down the rlogin connection. |
126 | */ |
127 | static void rlogin_send (char *buf, int len) { |
128 | |
129 | if (s == NULL) |
130 | return; |
131 | |
132 | sk_write(s, buf, len); |
133 | } |
134 | |
135 | /* |
136 | * Called to set the size of the window |
137 | */ |
138 | static void rlogin_size(void) { |
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139 | char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 }; |
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140 | |
141 | b[6] = cols >> 8; b[7] = cols & 0xFF; |
142 | b[4] = rows >> 8; b[5] = rows & 0xFF; |
143 | sk_write(s, b, 12); |
144 | return; |
145 | } |
146 | |
147 | /* |
148 | * Send rlogin special codes. |
149 | */ |
150 | static void rlogin_special (Telnet_Special code) { |
151 | /* Do nothing! */ |
152 | return; |
153 | } |
154 | |
155 | static Socket rlogin_socket(void) { return s; } |
156 | |
157 | static int rlogin_sendok(void) { return 1; } |
158 | |
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159 | static int rlogin_ldisc(int option) { |
160 | return 0; |
161 | } |
162 | |
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163 | Backend rlogin_backend = { |
164 | rlogin_init, |
165 | rlogin_send, |
166 | rlogin_size, |
167 | rlogin_special, |
168 | rlogin_socket, |
169 | rlogin_sendok, |
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170 | rlogin_ldisc, |
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171 | 1 |
172 | }; |