| 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 | { |
| 26 | from_backend(0, buf, len); |
| 27 | } |
| 28 | |
| 29 | static int rlogin_closing(Plug plug, char *error_msg, int error_code, |
| 30 | int calling_back) |
| 31 | { |
| 32 | sk_close(s); |
| 33 | s = NULL; |
| 34 | if (error_msg) { |
| 35 | /* A socket error has occurred. */ |
| 36 | connection_fatal(error_msg); |
| 37 | } /* Otherwise, the remote side closed the connection normally. */ |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static int rlogin_receive(Plug plug, int urgent, char *data, int len) |
| 42 | { |
| 43 | if (urgent == 2) { |
| 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 | */ |
| 56 | } else { |
| 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); |
| 71 | } |
| 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 | */ |
| 82 | static char *rlogin_init(char *host, int port, char **realhost) |
| 83 | { |
| 84 | static struct plug_function_table fn_table = { |
| 85 | rlogin_closing, |
| 86 | rlogin_receive |
| 87 | }, *fn_table_ptr = &fn_table; |
| 88 | |
| 89 | SockAddr addr; |
| 90 | char *err; |
| 91 | |
| 92 | /* |
| 93 | * Try to find host. |
| 94 | */ |
| 95 | addr = sk_namelookup(host, realhost); |
| 96 | if ((err = sk_addr_error(addr))) |
| 97 | return err; |
| 98 | |
| 99 | if (port < 0) |
| 100 | port = 513; /* default rlogin port */ |
| 101 | |
| 102 | /* |
| 103 | * Open socket. |
| 104 | */ |
| 105 | s = sk_new(addr, port, 1, 0, &fn_table_ptr); |
| 106 | if ((err = sk_socket_error(s))) |
| 107 | return err; |
| 108 | |
| 109 | sk_addr_free(addr); |
| 110 | |
| 111 | /* |
| 112 | * Send local username, remote username, terminal/speed |
| 113 | */ |
| 114 | |
| 115 | { |
| 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); |
| 128 | } |
| 129 | |
| 130 | return NULL; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * Called to send data down the rlogin connection. |
| 135 | */ |
| 136 | static void rlogin_send(char *buf, int len) |
| 137 | { |
| 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 | */ |
| 148 | static void rlogin_size(void) |
| 149 | { |
| 150 | char b[12] = { '\xFF', '\xFF', 0x73, 0x73, 0, 0, 0, 0, 0, 0, 0, 0 }; |
| 151 | |
| 152 | b[6] = cols >> 8; |
| 153 | b[7] = cols & 0xFF; |
| 154 | b[4] = rows >> 8; |
| 155 | b[5] = rows & 0xFF; |
| 156 | sk_write(s, b, 12); |
| 157 | return; |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * Send rlogin special codes. |
| 162 | */ |
| 163 | static void rlogin_special(Telnet_Special code) |
| 164 | { |
| 165 | /* Do nothing! */ |
| 166 | return; |
| 167 | } |
| 168 | |
| 169 | static Socket rlogin_socket(void) |
| 170 | { |
| 171 | return s; |
| 172 | } |
| 173 | |
| 174 | static int rlogin_sendok(void) |
| 175 | { |
| 176 | return 1; |
| 177 | } |
| 178 | |
| 179 | static int rlogin_ldisc(int option) |
| 180 | { |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | Backend rlogin_backend = { |
| 185 | rlogin_init, |
| 186 | rlogin_send, |
| 187 | rlogin_size, |
| 188 | rlogin_special, |
| 189 | rlogin_socket, |
| 190 | rlogin_sendok, |
| 191 | rlogin_ldisc, |
| 192 | 1 |
| 193 | }; |