src/TortoisePlink/sshutils.c

   1 /*
   2  * Supporting routines used in common by all the various components of
   3  * the SSH system.
   4  */
   5
   6 #include <assert.h>
   7 #include <stdlib.h>
   8
   9 #include "putty.h"
  10 #include "ssh.h"
  11 #include "sshchan.h"
  12
  13 /* ----------------------------------------------------------------------
  14  * Centralised standard methods for other channel implementations to
  15  * borrow.
  16  */
  17
  18 void chan_remotely_opened_confirmation(Channel *chan)
  19 {
  20     unreachable("this channel type should never receive OPEN_CONFIRMATION");
  21 }
  22
  23 void chan_remotely_opened_failure(Channel *chan, const char *errtext)
  24 {
  25     unreachable("this channel type should never receive OPEN_FAILURE");
  26 }
  27
  28 bool chan_default_want_close(
  29     Channel *chan, bool sent_local_eof, bool rcvd_remote_eof)
  30 {
  31     /*
  32      * Default close policy: we start initiating the CHANNEL_CLOSE
  33      * procedure as soon as both sides of the channel have seen EOF.
  34      */
  35     return sent_local_eof && rcvd_remote_eof;
  36 }
  37
  38 bool chan_no_exit_status(Channel *chan, int status)
  39 {
  40     return false;
  41 }
  42
  43 bool chan_no_exit_signal(
  44     Channel *chan, ptrlen signame, bool core_dumped, ptrlen msg)
  45 {
  46     return false;
  47 }
  48
  49 bool chan_no_exit_signal_numeric(
  50     Channel *chan, int signum, bool core_dumped, ptrlen msg)
  51 {
  52     return false;
  53 }
  54
  55 bool chan_no_run_shell(Channel *chan)
  56 {
  57     return false;
  58 }
  59
  60 bool chan_no_run_command(Channel *chan, ptrlen command)
  61 {
  62     return false;
  63 }
  64
  65 bool chan_no_run_subsystem(Channel *chan, ptrlen subsys)
  66 {
  67     return false;
  68 }
  69
  70 bool chan_no_enable_x11_forwarding(
  71     Channel *chan, bool oneshot, ptrlen authproto, ptrlen authdata,
  72     unsigned screen_number)
  73 {
  74     return false;
  75 }
  76
  77 bool chan_no_enable_agent_forwarding(Channel *chan)
  78 {
  79     return false;
  80 }
  81
  82 bool chan_no_allocate_pty(
  83     Channel *chan, ptrlen termtype, unsigned width, unsigned height,
  84     unsigned pixwidth, unsigned pixheight, struct ssh_ttymodes modes)
  85 {
  86     return false;
  87 }
  88
  89 bool chan_no_set_env(Channel *chan, ptrlen var, ptrlen value)
  90 {
  91     return false;
  92 }
  93
  94 bool chan_no_send_break(Channel *chan, unsigned length)
  95 {
  96     return false;
  97 }
  98
  99 bool chan_no_send_signal(Channel *chan, ptrlen signame)
 100 {
 101     return false;
 102 }
 103
 104 bool chan_no_change_window_size(
 105     Channel *chan, unsigned width, unsigned height,
 106     unsigned pixwidth, unsigned pixheight)
 107 {
 108     return false;
 109 }
 110
 111 void chan_no_request_response(Channel *chan, bool success)
 112 {
 113     unreachable("this channel type should never send a want-reply request");
 114 }
 115
 116 /* ----------------------------------------------------------------------
 117  * Other miscellaneous utility functions.
 118  */
 119
 120 void free_rportfwd(struct ssh_rportfwd *rpf)
 121 {
 122     if (rpf) {
 123         sfree(rpf->log_description);
 124         sfree(rpf->shost);
 125         sfree(rpf->dhost);
 126         sfree(rpf);
 127     }
 128 }