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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* include/cm.h */
/*
* Copyright 2002 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
/*
* Since fd_set is large on some platforms (8K on AIX 5.2), this probably
* shouldn't be allocated in automatic storage. Define USE_POLL and
* MAX_POLLFDS in the consumer of this header file to use poll state instead of
* select state.
*/
struct select_state {
#ifdef USE_POLL
struct pollfd fds[MAX_POLLFDS];
#else
int max;
fd_set rfds, wfds, xfds;
#endif
int nfds;
struct timeval end_time; /* magic: tv_sec==0 => never time out */
};
/* Select state flags. */
#define SSF_READ 0x01
#define SSF_WRITE 0x02
#define SSF_EXCEPTION 0x04
static const char *const state_strings[] = {
"INITIALIZING", "CONNECTING", "WRITING", "READING", "FAILED"
};
/* connection states */
enum conn_states { INITIALIZING, CONNECTING, WRITING, READING, FAILED };
struct incoming_krb5_message {
size_t bufsizebytes_read;
size_t bufsize;
char *buf;
char *pos;
unsigned char bufsizebytes[4];
size_t n_left;
};
struct conn_state {
SOCKET fd;
krb5_error_code err;
enum conn_states state;
unsigned int is_udp : 1;
int (*service)(krb5_context context, struct conn_state *,
struct select_state *, int);
int socktype;
int family;
size_t addrlen;
struct sockaddr_storage addr;
struct {
struct {
sg_buf sgbuf[2];
sg_buf *sgp;
int sg_count;
unsigned char msg_len_buf[4];
} out;
struct incoming_krb5_message in;
} x;
krb5_data callback_buffer;
size_t server_index;
struct conn_state *next;
};
struct sendto_callback_info {
int (*pfn_callback) (struct conn_state *, void *, krb5_data *);
void (*pfn_cleanup) (void *, krb5_data *);
void *context;
};
krb5_error_code krb5int_cm_call_select (const struct select_state *,
struct select_state *, int *);
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