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/* utalk, a UDP-based "talk" replacement, using srdp
Copyright (C) 1995 Roger Espel Llima
comm.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 COMM_H
#define COMM_H
#include <sys/types.h>
#include <netinet/in.h>
#include "srdp.h"
#define READBUFSIZE 2084
#define OUTBUFSIZE 2048
#define SENDAFTER 440 /* send a packet when buffered data exceeds..*/
#define MAXBUFDELAY 250000 /* max delay in microseconds for buffering */
#define UTALK_DATA 2
#define UTALK_TOPIC 4
#define UTALK_REVISION 1
#define ODAEMON 0
#define NDAEMON 1
#define BOTH 2
#define NAME_SIZE 9
#define TTY_SIZE 16
typedef struct {
srdp_u16 sin_family;
srdp_u16 sin_port;
struct in_addr sin_addr;
char sin_zero[8];
} BSD42_SOCK;
struct mesg {
int daemon; /* type of daemon */
char type; /* type of message */
char local_name[NAME_SIZE];
char remote_name[NAME_SIZE];
char remote_tty[TTY_SIZE];
/* struct sockaddr_in addr;
struct sockaddr_in ctl_addr; xxx these get filled automatically */
srdp_u32 id;
};
struct answer {
int daemon; /* type of daemon */
char type;
char answer;
srdp_u32 id;
BSD42_SOCK addr;
};
/* Control Message structure for earlier than BSD4.2 */
struct old_msg {
char type;
char l_name[NAME_SIZE];
char r_name[NAME_SIZE];
char filler;
srdp_u32 id_num;
srdp_u32 pid;
char r_tty[TTY_SIZE];
BSD42_SOCK addr;
BSD42_SOCK ctl_addr;
};
/* Control Response structure for earlier than BSD4.2 */
struct old_reply {
char type;
char answer;
srdp_u16 filler;
srdp_u32 id_num;
BSD42_SOCK addr;
};
/* Control Message structure for BSD4.2 */
struct new_msg {
unsigned char vers;
char type;
char filler[2];
srdp_u32 id_num;
BSD42_SOCK addr;
BSD42_SOCK ctl_addr;
srdp_u32 pid;
char l_name[NAME_SIZE];
char l_name_filler[3];
char r_name[NAME_SIZE];
char r_name_filler[3];
char r_tty[TTY_SIZE];
};
/* Control Response structure for BSD4.2 */
struct new_reply {
unsigned char vers;
char type;
char answer;
char filler;
srdp_u32 id_num;
BSD42_SOCK addr;
};
#define NTALKD_VERSION 1
/* dgram types */
#define LEAVE_INVITE 0 /* leave an invitation (local) */
#define LOOK_UP 1 /* look up an invitation (remote) */
#define DELETE 2 /* delete erroneous invitation (remote) */
#define ANNOUNCE 3 /* ring a user (remote) */
#define DELETE_INVITE 4 /* delete my invitation (local) */
/* answer values */
#define SUCCESS 0 /* operation completed properly */
#define NOT_HERE 1 /* callee not logged in */
#define FAILED 2 /* operation failed for unexplained reason */
#define MACHINE_UNKNOWN 3 /* caller's machine name unknown */
#define PERMISSION_DENIED 4 /* callee's tty doesn't permit announce */
#define UNKNOWN_REQUEST 5 /* request has invalid type value */
#define BADVERSION 6 /* request has invalid protocol version */
#define BADADDR 7 /* request has invalid addr value */
#define BADCTLADDR 8 /* request has invalid ctl_addr value */
extern void init_comm(int raw, char *h, int p, char *uh);
extern void quick_clear_invite(void);
extern void main_loop(void);
extern void c_write_char(int line, int col, unsigned char ch);
extern void c_write_string(int line, int col, unsigned char *s, int len);
extern void c_set_cursor(int line, int col);
extern void c_shorten_lline(int line, int len);
extern void c_send_beep(int line, int col);
extern void c_resync(void);
extern void c_send_topic(char *s);
extern void c_close(void);
#endif
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