c91409da |
1 | #include <windows.h> |
2 | #include <stdio.h> |
3 | #include <stdlib.h> |
4 | |
5 | #include "putty.h" |
6 | |
7 | #ifndef FALSE |
8 | #define FALSE 0 |
9 | #endif |
10 | #ifndef TRUE |
11 | #define TRUE 1 |
12 | #endif |
13 | |
14 | static Socket s = NULL; |
15 | |
16 | static void rlogin_size(void); |
17 | |
18 | static int sb_opt, sb_len; |
19 | static char *sb_buf = NULL; |
20 | static int sb_size = 0; |
21 | #define SB_DELTA 1024 |
22 | |
23 | static void c_write (char *buf, int len) { |
24 | from_backend(0, buf, len); |
25 | } |
26 | |
7dbb9f56 |
27 | static int rlogin_receive (Socket skt, int urgent, char *data, int len) { |
2c94fd1c |
28 | if (urgent==3) { |
29 | /* A socket error has occurred. */ |
b47b2198 |
30 | sk_close(s); |
7dbb9f56 |
31 | s = NULL; |
2c94fd1c |
32 | connection_fatal(data); |
b47b2198 |
33 | return 0; |
34 | } else if (!len) { |
c91409da |
35 | /* Connection has closed. */ |
36 | sk_close(s); |
37 | s = NULL; |
38 | return 0; |
39 | } |
40 | if (urgent == 2) { |
41 | char c; |
c91409da |
42 | |
43 | c = *data++; len--; |
ec169997 |
44 | if (c == '\x80') |
c91409da |
45 | rlogin_size(); |
46 | /* |
47 | * We should flush everything (aka Telnet SYNCH) if we see |
48 | * 0x02, and we should turn off and on _local_ flow control |
49 | * on 0x10 and 0x20 respectively. I'm not convinced it's |
50 | * worth it... |
51 | */ |
8a5fb9e3 |
52 | } else { |
53 | /* |
54 | * Main rlogin protocol. This is really simple: the first |
55 | * byte is expected to be NULL and is ignored, and the rest |
56 | * is printed. |
57 | */ |
58 | static int firstbyte = 1; |
59 | if (firstbyte) { |
60 | if (data[0] == '\0') { |
61 | data++; |
62 | len--; |
63 | } |
64 | firstbyte = 0; |
65 | } |
66 | c_write(data, len); |
c91409da |
67 | } |
c91409da |
68 | return 1; |
69 | } |
70 | |
71 | /* |
72 | * Called to set up the rlogin connection. |
73 | * |
74 | * Returns an error message, or NULL on success. |
75 | * |
76 | * Also places the canonical host name into `realhost'. |
77 | */ |
78 | static char *rlogin_init (char *host, int port, char **realhost) { |
79 | SockAddr addr; |
80 | char *err; |
81 | |
82 | /* |
83 | * Try to find host. |
84 | */ |
85 | addr = sk_namelookup(host, realhost); |
86 | if ( (err = sk_addr_error(addr)) ) |
87 | return err; |
88 | |
89 | if (port < 0) |
90 | port = 513; /* default rlogin port */ |
91 | |
92 | /* |
93 | * Open socket. |
94 | */ |
4b1e8acc |
95 | s = sk_new(addr, port, 1, 0, rlogin_receive); |
c91409da |
96 | if ( (err = sk_socket_error(s)) ) |
97 | return err; |
98 | |
99 | sk_addr_free(addr); |
100 | |
101 | /* |
102 | * Send local username, remote username, terminal/speed |
103 | */ |
104 | |
105 | { |
106 | char z = 0; |
107 | char *p; |
108 | sk_write(s, &z, 1); |
109 | sk_write(s, cfg.localusername, strlen(cfg.localusername)); |
110 | sk_write(s, &z, 1); |
111 | sk_write(s, cfg.username, strlen(cfg.username)); |
112 | sk_write(s, &z, 1); |
113 | sk_write(s, cfg.termtype, strlen(cfg.termtype)); |
114 | sk_write(s, "/", 1); |
115 | for(p = cfg.termspeed; isdigit(*p); p++); |
116 | sk_write(s, cfg.termspeed, p - cfg.termspeed); |
117 | sk_write(s, &z, 1); |
118 | } |
119 | |
c91409da |
120 | return NULL; |
121 | } |
122 | |
123 | /* |
124 | * Called to send data down the rlogin connection. |
125 | */ |
126 | static void rlogin_send (char *buf, int len) { |
127 | |
128 | if (s == NULL) |
129 | return; |
130 | |
131 | sk_write(s, buf, len); |
132 | } |
133 | |
134 | /* |
135 | * Called to set the size of the window |
136 | */ |
137 | static void rlogin_size(void) { |
e418595a |
138 | char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 }; |
c91409da |
139 | |
140 | b[6] = cols >> 8; b[7] = cols & 0xFF; |
141 | b[4] = rows >> 8; b[5] = rows & 0xFF; |
142 | sk_write(s, b, 12); |
143 | return; |
144 | } |
145 | |
146 | /* |
147 | * Send rlogin special codes. |
148 | */ |
149 | static void rlogin_special (Telnet_Special code) { |
150 | /* Do nothing! */ |
151 | return; |
152 | } |
153 | |
154 | static Socket rlogin_socket(void) { return s; } |
155 | |
156 | static int rlogin_sendok(void) { return 1; } |
157 | |
0965bee0 |
158 | static int rlogin_ldisc(int option) { |
159 | return 0; |
160 | } |
161 | |
c91409da |
162 | Backend rlogin_backend = { |
163 | rlogin_init, |
164 | rlogin_send, |
165 | rlogin_size, |
166 | rlogin_special, |
167 | rlogin_socket, |
168 | rlogin_sendok, |
0965bee0 |
169 | rlogin_ldisc, |
c91409da |
170 | 1 |
171 | }; |