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 void c_write(char *buf, int len)
  19 {
  20     from_backend(0, buf, len);
  21 }
  22
  23 static int raw_closing(Plug plug, char *error_msg, int error_code,
  24                        int calling_back)
  25 {
  26     sk_close(s);
  27     s = NULL;
  28     if (error_msg) {
  29         /* A socket error has occurred. */
  30         connection_fatal(error_msg);
  31     }                                  /* Otherwise, the remote side closed the connection normally. */
  32     return 0;
  33 }
  34
  35 static int raw_receive(Plug plug, int urgent, char *data, int len)
  36 {
  37     c_write(data, len);
  38     return 1;
  39 }
  40
  41 /*
  42  * Called to set up the raw connection.
  43  *
  44  * Returns an error message, or NULL on success.
  45  *
  46  * Also places the canonical host name into `realhost'. It must be
  47  * freed by the caller.
  48  */
  49 static char *raw_init(char *host, int port, char **realhost)
  50 {
  51     static struct plug_function_table fn_table = {
  52         raw_closing,
  53         raw_receive
  54     }, *fn_table_ptr = &fn_table;
  55
  56     SockAddr addr;
  57     char *err;
  58
  59     /*
  60      * Try to find host.
  61      */
  62     addr = sk_namelookup(host, realhost);
  63     if ((err = sk_addr_error(addr)))
  64         return err;
  65
  66     if (port < 0)
  67         port = 23;                     /* default telnet port */
  68
  69     /*
  70      * Open socket.
  71      */
  72     s = sk_new(addr, port, 0, 1, &fn_table_ptr);
  73     if ((err = sk_socket_error(s)))
  74         return err;
  75
  76     sk_addr_free(addr);
  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
  87     if (s == NULL)
  88         return;
  89
  90     sk_write(s, buf, len);
  91 }
  92
  93 /*
  94  * Called to set the size of the window
  95  */
  96 static void raw_size(void)
  97 {
  98     /* Do nothing! */
  99     return;
 100 }
 101
 102 /*
 103  * Send raw special codes.
 104  */
 105 static void raw_special(Telnet_Special code)
 106 {
 107     /* Do nothing! */
 108     return;
 109 }
 110
 111 static Socket raw_socket(void)
 112 {
 113     return s;
 114 }
 115
 116 static int raw_sendok(void)
 117 {
 118     return 1;
 119 }
 120
 121 static int raw_ldisc(int option)
 122 {
 123     if (option == LD_EDIT || option == LD_ECHO)
 124         return 1;
 125     return 0;
 126 }
 127
 128 Backend raw_backend = {
 129     raw_init,
 130     raw_send,
 131     raw_size,
 132     raw_special,
 133     raw_socket,
 134     raw_sendok,
 135     raw_ldisc,
 136     1
 137 };