4.2BSD/usr/src/ucb/talk/ctl.h

/* $Header: ctl.h 1.4 83/03/28 20:46:27 moore Exp $ */

/* ctl.h describes the structure that talk and talkd pass back
   and forth
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#define NAME_SIZE 9
#define TTY_SIZE 16
#define HOST_NAME_LENGTH 256

#define MAX_LIFE 60 /* maximum time an invitation is saved by the
			 talk daemons */
#define RING_WAIT 30  /* time to wait before refreshing invitation 
			 should be 10's of seconds less than MAX_LIFE */

    /* the values for type */

#define LEAVE_INVITE 0
#define LOOK_UP 1
#define DELETE 2
#define ANNOUNCE 3

    /* the values for answer */

#define SUCCESS 0
#define NOT_HERE 1
#define FAILED 2
#define MACHINE_UNKNOWN 3
#define PERMISSION_DENIED 4
#define UNKNOWN_REQUEST 5

typedef struct ctl_response CTL_RESPONSE;

struct ctl_response {
    char type;
    char answer;
    int id_num;
    struct sockaddr_in addr;
};

typedef struct ctl_msg CTL_MSG;

struct ctl_msg {
    char type;
    char l_name[NAME_SIZE];
    char r_name[NAME_SIZE];
    int id_num;
    int pid;
    char r_tty[TTY_SIZE];
    struct sockaddr_in addr;
    struct sockaddr_in ctl_addr;
};