mdw@git.distorted.org.uk Git - sgt/putty/blob - raw.c

   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 raw_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 {
  25     from_backend(0, buf, len);
  26 }
  27
  28 static int raw_closing(Plug plug, char *error_msg, int error_code,
  29                        int calling_back)
  30 {
  31     sk_close(s);
  32     s = NULL;
  33     if (error_msg) {
  34         /* A socket error has occurred. */
  35         connection_fatal(error_msg);
  36     }                                  /* Otherwise, the remote side closed the connection normally. */
  37     return 0;
  38 }
  39
  40 static int raw_receive(Plug plug, int urgent, char *data, int len)
  41 {
  42     c_write(data, len);
  43     return 1;
  44 }
  45
  46 /*
  47  * Called to set up the raw connection.
  48  *
  49  * Returns an error message, or NULL on success.
  50  *
  51  * Also places the canonical host name into `realhost'. It must be
  52  * freed by the caller.
  53  */
  54 static char *raw_init(char *host, int port, char **realhost)
  55 {
  56     static struct plug_function_table fn_table = {
  57         raw_closing,
  58         raw_receive
  59     }, *fn_table_ptr = &fn_table;
  60
  61     SockAddr addr;
  62     char *err;
  63
  64     /*
  65      * Try to find host.
  66      */
  67     addr = sk_namelookup(host, realhost);
  68     if ((err = sk_addr_error(addr)))
  69         return err;
  70
  71     if (port < 0)
  72         port = 23;                     /* default telnet port */
  73
  74     /*
  75      * Open socket.
  76      */
  77     s = sk_new(addr, port, 0, 1, &fn_table_ptr);
  78     if ((err = sk_socket_error(s)))
  79         return err;
  80
  81     sk_addr_free(addr);
  82
  83     return NULL;
  84 }
  85
  86 /*
  87  * Called to send data down the raw connection.
  88  */
  89 static void raw_send(char *buf, int len)
  90 {
  91
  92     if (s == NULL)
  93         return;
  94
  95     sk_write(s, buf, len);
  96 }
  97
  98 /*
  99  * Called to set the size of the window
 100  */
 101 static void raw_size(void)
 102 {
 103     /* Do nothing! */
 104     return;
 105 }
 106
 107 /*
 108  * Send raw special codes.
 109  */
 110 static void raw_special(Telnet_Special code)
 111 {
 112     /* Do nothing! */
 113     return;
 114 }
 115
 116 static Socket raw_socket(void)
 117 {
 118     return s;
 119 }
 120
 121 static int raw_sendok(void)
 122 {
 123     return 1;
 124 }
 125
 126 static int raw_ldisc(int option)
 127 {
 128     if (option == LD_EDIT || option == LD_ECHO)
 129         return 1;
 130     return 0;
 131 }
 132
 133 Backend raw_backend = {
 134     raw_init,
 135     raw_send,
 136     raw_size,
 137     raw_special,
 138     raw_socket,
 139     raw_sendok,
 140     raw_ldisc,
 141     1
 142 };