| 1 | #include <windows.h> |
| 2 | #include <stdio.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <ctype.h> |
| 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 | |
| 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) { |
| 32 | /* A socket error has occurred. */ |
| 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) { |
| 39 | if (urgent == 2) { |
| 40 | char c; |
| 41 | |
| 42 | c = *data++; 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 | */ |
| 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); |
| 66 | } |
| 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) { |
| 78 | static struct plug_function_table fn_table = { |
| 79 | rlogin_closing, |
| 80 | rlogin_receive |
| 81 | }, *fn_table_ptr = &fn_table; |
| 82 | |
| 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 | */ |
| 99 | s = sk_new(addr, port, 1, 0, &fn_table_ptr); |
| 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 | |
| 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) { |
| 142 | char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 }; |
| 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 | |
| 162 | static int rlogin_ldisc(int option) { |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | Backend rlogin_backend = { |
| 167 | rlogin_init, |
| 168 | rlogin_send, |
| 169 | rlogin_size, |
| 170 | rlogin_special, |
| 171 | rlogin_socket, |
| 172 | rlogin_sendok, |
| 173 | rlogin_ldisc, |
| 174 | 1 |
| 175 | }; |