citadel/ipc_c_tcp.c

   1 /*
   2  * $Id$
   3  *
   4  * Client-side IPC functions
   5  *
   6  */
   7
   8
   9 #include "sysdep.h"
  10 #undef NDEBUG
  11 #include <assert.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <signal.h>
  16 #include <sys/types.h>
  17 #include <sys/socket.h>
  18 #include <netinet/in.h>
  19 #include <arpa/inet.h>
  20 #include <sys/un.h>
  21 #include <netdb.h>
  22 #include <string.h>
  23 #include <pwd.h>
  24 #include <errno.h>
  25 #include <stdarg.h>
  26 #include <libcitadel.h>
  27 #include "citadel.h"
  28 #include "citadel_ipc.h"
  29 #include "citadel_decls.h"
  30 #ifndef HAVE_SNPRINTF
  31 #include "snprintf.h"
  32 #endif
  33
  34 /* Note that some of these functions may not work with multiple instances. */
  35
  36 static void (*deathHook)(void) = NULL;
  37 int (*error_printf)(char *s, ...) = (int (*)(char *, ...))printf;
  38
  39 void setIPCDeathHook(void (*hook)(void)) {
  40         deathHook = hook;
  41 }
  42
  43 void setIPCErrorPrintf(int (*func)(char *s, ...)) {
  44         error_printf = func;
  45 }
  46
  47 void connection_died(CtdlIPC* ipc, int using_ssl) {
  48         if (deathHook != NULL) {
  49                 deathHook();
  50         }
  51
  52         stty_ctdl(SB_RESTORE);
  53         fprintf(stderr, "\r\n\n\n");
  54         fprintf(stderr, "Your connection to %s is broken.\n", ipc->ServInfo.humannode);
  55
  56 #ifdef HAVE_OPENSSL
  57         if (using_ssl) {
  58                 printf(stderr, "Last error: %s\n", ERR_reason_error_string(ERR_get_error()));
  59                 SSL_free(ipc->ssl);
  60                 ipc->ssl = NULL;
  61         } else
  62 #endif
  63                 fprintf(stderr, "Last error: %s\n", strerror(errno));
  64
  65         fprintf(stderr, "Please re-connect and log in again.\n");
  66         fflush(stderr);
  67         fflush(stdout);
  68         shutdown(ipc->sock, 2);
  69         ipc->sock = -1;
  70         exit(1);
  71 }