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 {
  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'.
  52  */
  53 static char *raw_init(char *host, int port, char **realhost)
  54 {
  55     static struct plug_function_table fn_table = {
  56         raw_closing,
  57         raw_receive
  58     }, *fn_table_ptr = &fn_table;
  59
  60     SockAddr addr;
  61     char *err;
  62
  63     /*
  64      * Try to find host.
  65      */
  66     addr = sk_namelookup(host, realhost);
  67     if ((err = sk_addr_error(addr)))
  68         return err;
  69
  70     if (port < 0)
  71         port = 23;                     /* default telnet port */
  72
  73     /*
  74      * Open socket.
  75      */
  76     s = sk_new(addr, port, 0, 1, &fn_table_ptr);
  77     if ((err = sk_socket_error(s)))
  78         return err;
  79
  80     sk_addr_free(addr);
  81
  82     return NULL;
  83 }
  84
  85 /*
  86  * Called to send data down the raw connection.
  87  */
  88 static void raw_send(char *buf, int len)
  89 {
  90
  91     if (s == NULL)
  92         return;
  93
  94     sk_write(s, buf, len);
  95 }
  96
  97 /*
  98  * Called to set the size of the window
  99  */
 100 static void raw_size(void)
 101 {
 102     /* Do nothing! */
 103     return;
 104 }
 105
 106 /*
 107  * Send raw special codes.
 108  */
 109 static void raw_special(Telnet_Special code)
 110 {
 111     /* Do nothing! */
 112     return;
 113 }
 114
 115 static Socket raw_socket(void)
 116 {
 117     return s;
 118 }
 119
 120 static int raw_sendok(void)
 121 {
 122     return 1;
 123 }
 124
 125 static int raw_ldisc(int option)
 126 {
 127     if (option == LD_EDIT || option == LD_ECHO)
 128         return 1;
 129     return 0;
 130 }
 131
 132 Backend raw_backend = {
 133     raw_init,
 134     raw_send,
 135     raw_size,
 136     raw_special,
 137     raw_socket,
 138     raw_sendok,
 139     raw_ldisc,
 140     1
 141 };