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     return NULL;
  74 }
  75
  76 /*
  77  * Called to send data down the raw connection.
  78  */
  79 static void raw_send (char *buf, int len) {
  80
  81     if (s == NULL)
  82         return;
  83
  84     sk_write(s, buf, len);
  85 }
  86
  87 /*
  88  * Called to set the size of the window
  89  */
  90 static void raw_size(void) {
  91     /* Do nothing! */
  92     return;
  93 }
  94
  95 /*
  96  * Send raw special codes.
  97  */
  98 static void raw_special (Telnet_Special code) {
  99     /* Do nothing! */
 100     return;
 101 }
 102
 103 static Socket raw_socket(void) { return s; }
 104
 105 static int raw_sendok(void) { return 1; }
 106
 107 static int raw_ldisc(int option) {
 108     if (option == LD_EDIT || option == LD_ECHO)
 109         return 1;
 110     return 0;
 111 }
 112
 113 Backend raw_backend = {
 114     raw_init,
 115     raw_send,
 116     raw_size,
 117     raw_special,
 118     raw_socket,
 119     raw_sendok,
 120     raw_ldisc,
 121     1
 122 };