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