usr/src/lib/gss_mechs/mech_krb5/include/cm.h

   1 /*
   2  * include/cm.h
   3  *
   4  * Copyright 2002 by the Massachusetts Institute of Technology.
   5  * All Rights Reserved.
   6  *
   7  * Export of this software from the United States of America may
   8  *   require a specific license from the United States Government.
   9  *   It is the responsibility of any person or organization contemplating
  10  *   export to obtain such a license before exporting.
  11  *
  12  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
  13  * distribute this software and its documentation for any purpose and
  14  * without fee is hereby granted, provided that the above copyright
  15  * notice appear in all copies and that both that copyright notice and
  16  * this permission notice appear in supporting documentation, and that
  17  * the name of M.I.T. not be used in advertising or publicity pertaining
  18  * to distribution of the software without specific, written prior
  19  * permission.  Furthermore if you modify this software you must label
  20  * your software as modified software and not distribute it in such a
  21  * fashion that it might be confused with the original M.I.T. software.
  22  * M.I.T. makes no representations about the suitability of
  23  * this software for any purpose.  It is provided "as is" without express
  24  * or implied warranty.
  25  */
  26
  27 /* Since fd_set is large on some platforms (8K on AIX 5.2), this
  28    probably shouldn't be allocated in automatic storage.  */
  29 struct select_state {
  30     int max, nfds;
  31     fd_set rfds, wfds, xfds;
  32     struct timeval end_time;    /* magic: tv_sec==0 => never time out */
  33 };
  34
  35
  36 /* Select state flags.  */
  37 #define SSF_READ        0x01
  38 #define SSF_WRITE       0x02
  39 #define SSF_EXCEPTION   0x04
  40
  41
  42 static const char *const state_strings[] = {
  43     "INITIALIZING", "CONNECTING", "WRITING", "READING", "FAILED"
  44 };
  45
  46
  47 /* connection states */
  48 enum conn_states { INITIALIZING, CONNECTING, WRITING, READING, FAILED };
  49 struct incoming_krb5_message {
  50     size_t bufsizebytes_read;
  51     size_t bufsize;
  52     char *buf;
  53     char *pos;
  54     unsigned char bufsizebytes[4];
  55     size_t n_left;
  56 };
  57 struct conn_state {
  58     SOCKET fd;
  59     krb5_error_code err;
  60     enum conn_states state;
  61     unsigned int is_udp : 1;
  62     int (*service)(struct conn_state *, struct select_state *, int);
  63     struct addrinfo *addr;
  64     struct {
  65         struct {
  66             sg_buf sgbuf[2];
  67             sg_buf *sgp;
  68             int sg_count;
  69             unsigned char msg_len_buf[4];
  70         } out;
  71         struct incoming_krb5_message in;
  72     } x;
  73 };
  74
  75 struct sendto_callback_info {
  76     int  (*pfn_callback) (struct conn_state *, void *, krb5_data *);
  77     void (*pfn_cleanup)  (void *, krb5_data *);
  78     void  *context;
  79 };
  80
  81
  82 krb5_error_code krb5int_cm_call_select (const struct select_state *,
  83                                         struct select_state *, int *);