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/* SRDP, Semi-Reliable Datagram Protocol
Copyright (C) 1995 Roger Espel Llima
srdp.h
Started: 19 Oct 95 by <roger.espel.llima@pobox.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation. See the file LICENSE for details.
*/
#ifndef SRDP_H
#define SRDP_H
#include "srdpdata.h"
#include <sys/time.h>
extern int srdp_open(struct srdp_info *info);
/* opens the socket, adds it to the global select table, returns
0 if ok, -1 if error */
extern int srdp_select(int width, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, struct timeval *timeout);
/* does a select on the given fds + on any open sockets, and updates
the SRDP_FL_READY flag on any sockets that are ready for reading
(which actually means there are data chunks already read) */
extern int srdp_read(struct srdp_info *info, struct srdp_chunk *chunk,
int csize);
/* reads one data chunk (from the srdp buffers) and returns 1 if ok,
or 0 if there was none to read, or 2 if the packet was
truncated, -1 if the connection is closed; updates SRDP_FL_READY */
/* the fields sequenced.seq and sequenced|noseq.len get returned in
network order! */
extern int srdp_write(struct srdp_info *info, struct srdp_chunk *chunk);
/* sends out a data chunk; returns -1 if error, 0 if ok */
/* the field sequenced|noseq.len must be set in network order! */
extern void srdp_synch(struct srdp_info *info);
/* sends out an SRDP_CURRENT and SRDP_MISSLST */
extern void srdp_close(struct srdp_info *info, char *message);
/* attempts to gracefully close the connection; may block for
a few seconds */
extern void srdp_drop(struct srdp_info *info, char *message);
/* drops the connection; will not block */
#endif
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