git.distorted.org.uk Git - u/mdw/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     from_backend(0, buf, len);
  25 }
  26
  27 static int raw_receive (Socket s, int urgent, char *data, int len) {
  28     if (urgent==3) {
  29         /* A socket error has occurred. */
  30         connection_fatal(data);
  31         len = 0;
  32     }
  33     if (!len) {
  34         /* Connection has closed. */
  35         sk_close(s);
  36         s = NULL;
  37         return 0;
  38     }
  39     c_write(data, len);
  40     return 1;
  41 }
  42
  43 /*
  44  * Called to set up the raw connection.
  45  *
  46  * Returns an error message, or NULL on success.
  47  *
  48  * Also places the canonical host name into `realhost'.
  49  */
  50 static char *raw_init (char *host, int port, char **realhost) {
  51     SockAddr addr;
  52     char *err;
  53
  54     /*
  55      * Try to find host.
  56      */
  57     addr = sk_namelookup(host, realhost);
  58     if ( (err = sk_addr_error(addr)) )
  59         return err;
  60
  61     if (port < 0)
  62         port = 23;                     /* default telnet port */
  63
  64     /*
  65      * Open socket.
  66      */
  67     s = sk_new(addr, port, 0, raw_receive);
  68     if ( (err = sk_socket_error(s)) )
  69         return err;
  70
  71     sk_addr_free(addr);
  72
  73     /*
  74      * We have no pre-session phase.
  75      */
  76     begin_session();
  77
  78     return NULL;
  79 }
  80
  81 /*
  82  * Called to send data down the raw connection.
  83  */
  84 static void raw_send (char *buf, int len) {
  85
  86     if (s == NULL)
  87         return;
  88
  89     sk_write(s, buf, len);
  90 }
  91
  92 /*
  93  * Called to set the size of the window
  94  */
  95 static void raw_size(void) {
  96     /* Do nothing! */
  97     return;
  98 }
  99
 100 /*
 101  * Send raw special codes.
 102  */
 103 static void raw_special (Telnet_Special code) {
 104     /* Do nothing! */
 105     return;
 106 }
 107
 108 static Socket raw_socket(void) { return s; }
 109
 110 static int raw_sendok(void) { return 1; }
 111
 112 Backend raw_backend = {
 113     raw_init,
 114     raw_send,
 115     raw_size,
 116     raw_special,
 117     raw_socket,
 118     raw_sendok,
 119     1
 120 };