talk.h

操作系统源代码

/* talk.h Copyright Michael Temari 07/22/1996 All Rights Reserved */

#define	USER_SIZE	12
#define	TTY_SIZE	16
#define	HOST_SIZE	255

struct osockaddr {
	u16_t sa_family;
	u16_t sin_port;
	ipaddr_t sin_addr;
	char junk[8];
};

struct talk_request {
	u8_t version;
	u8_t type;
	u8_t answer;
	u8_t junk;
	u32_t id;
	struct osockaddr addr;
	struct osockaddr ctl_addr;
	long pid;
	char	luser[USER_SIZE];
	char	ruser[USER_SIZE];
	char	rtty[TTY_SIZE];
};

struct talk_reply {
	u8_t version;
	u8_t type;
	u8_t answer;
	u8_t junk;
	u32_t id;
	struct osockaddr addr;
};

#define	TALK_VERSION	1

/* message type values */
#define LEAVE_INVITE	0	/* leave invitation with server */
#define LOOK_UP		1	/* check for invitation by callee */
#define DELETE		2	/* delete invitation by caller */
#define ANNOUNCE	3	/* announce invitation by caller */

/* 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 */

#define MAX_LIFE	60	/* max time daemon saves invitations */
#define RING_WAIT	30	/* time to wait before resending invitation */