* Copyright 2005 Sun Microsystems, Inc.  All rights reserved.

/*

 * UDP implementation private declarations.  These interfaces are

 * used to build the IP module and are not meant to be accessed

 * by any modules except IP itself.  They are undocumented and are

 * subject to change without notice.

 */

#define	UDP_MOD_ID		5607

/* udp_mode. UDP_MT_HOT and UDP_SQUEUE are stable modes. Rest are transient */

typedef enum {

	UDP_MT_HOT = 0,			/* UDP endpoint is MT HOT */

	UDP_MT_QUEUED = 1,		/* Messages enqueued in udp_mphead */

	UDP_QUEUED_SQUEUE = 2,		/* Messages enqueued in conn_sqp */

	UDP_SQUEUE = 3			/* Single threaded using squeues */

} udp_mode_t;

	uint32_t	udp_state;	/* TPI state */

	in_port_t	udp_port;	/* Port bound to this stream */

	in_port_t	udp_dstport;	/* Connected port */

	in6_addr_t	udp_v6src;	/* Source address of this stream */

	in6_addr_t	udp_bound_v6src; /* Explicitly bound address */

	in6_addr_t	udp_v6dst;	/* Connected destination */

	uint32_t	udp_max_hdr_len; /* For write offset in stream head */

	uint32_t	udp_ip_snd_options_len; /* Len of IPv4 options */

	uint32_t	udp_ip_rcv_options_len; /* Len of IPv4 options recvd */

	ipaddr_t	udp_multicast_if_addr;  /* IP_MULTICAST_IF option */

	conn_t		*udp_connp;

		udp_recvopts : 1,	/* IP_RECVOPTS option */

		udp_ipv6_recvhoplimit : 1,	/* IPV6_RECVHOPLIMIT option */

		udp_ipv6_recvtclass : 1,	/* IPV6_RECVTCLASS */

		udp_recvif : 1,		/* IP_RECVIF option */

		udp_old_ipv6_recvdstopts : 1,	/* old form of IPV6_DSTOPTS */

		udp_rcvhdr : 1,		/* UDP_RCVHDR option */

		udp_issocket : 1,	/* socket mode */

		udp_direct_sockfs : 1,	/* direct calls to/from sockfs */

		udp_pad_to_bit_31 : 4;

	udp_mode_t	udp_mode;	/* Current mode of operation */

	mblk_t		*udp_mphead;	/* Head of the queued operations */

	mblk_t		*udp_mptail;	/* Tail of the queued operations */

	uint_t		udp_mpcount;	/* Number of messages in the queue */

	uint_t		udp_reader_count; /* Number of reader threads */

	uint_t		udp_squeue_count; /* Number of messages in conn_sqp */

	kmutex_t	udp_drain_lock;		/* lock for udp_rcv_list */

	boolean_t	udp_drain_qfull;	/* drain queue is full */

	mblk_t		*udp_rcv_list_head;	/* b_next chain of mblks */

	mblk_t		*udp_rcv_list_tail;	/* last mblk in chain */

	uint_t		udp_rcv_cnt;		/* total data in rcv_list */

	uint_t		udp_rcv_msgcnt;		/* total messages in rcv_list */

	size_t		udp_rcv_hiwat;		/* receive high watermark */

/* Named Dispatch Parameter Management Structure */

typedef struct udpparam_s {

	uint32_t udp_param_min;

	uint32_t udp_param_max;

	uint32_t udp_param_value;

	char	*udp_param_name;

} udpparam_t;

extern udpparam_t udp_param_arr[];

#define	udp_wroff_extra			udp_param_arr[0].udp_param_value

#define	udp_ipv4_ttl			udp_param_arr[1].udp_param_value

#define	udp_ipv6_hoplimit		udp_param_arr[2].udp_param_value

#define	udp_smallest_nonpriv_port	udp_param_arr[3].udp_param_value

#define	udp_do_checksum			udp_param_arr[4].udp_param_value

#define	udp_smallest_anon_port		udp_param_arr[5].udp_param_value

#define	udp_largest_anon_port		udp_param_arr[6].udp_param_value

#define	udp_xmit_hiwat			udp_param_arr[7].udp_param_value

#define	udp_xmit_lowat			udp_param_arr[8].udp_param_value

#define	udp_recv_hiwat			udp_param_arr[9].udp_param_value

#define	udp_max_buf			udp_param_arr[10].udp_param_value

#define	udp_ndd_get_info_interval	udp_param_arr[11].udp_param_value

/* Kstats */

typedef struct {				/* Class "net" kstats */

	kstat_named_t	udp_ip_send;

	kstat_named_t	udp_ip_ire_send;

	kstat_named_t	udp_ire_null;

	kstat_named_t	udp_drain;

	kstat_named_t	udp_sock_fallback;

	kstat_named_t	udp_rrw_busy;

	kstat_named_t	udp_rrw_msgcnt;

	kstat_named_t	udp_out_sw_cksum;

	kstat_named_t	udp_out_sw_cksum_bytes;

	kstat_named_t	udp_out_opt;

	kstat_named_t	udp_out_err_notconn;

	kstat_named_t	udp_out_err_output;

	kstat_named_t	udp_out_err_tudr;

	kstat_named_t	udp_in_pktinfo;

	kstat_named_t	udp_in_recvdstaddr;

	kstat_named_t	udp_in_recvopts;

	kstat_named_t	udp_in_recvif;

	kstat_named_t	udp_in_recvslla;

	kstat_named_t	udp_in_recvucred;

	kstat_named_t	udp_in_recvttl;

	kstat_named_t	udp_in_recvhopopts;

	kstat_named_t	udp_in_recvhoplimit;

	kstat_named_t	udp_in_recvdstopts;

	kstat_named_t	udp_in_recvrtdstopts;

	kstat_named_t	udp_in_recvrthdr;

	kstat_named_t	udp_in_recvpktinfo;

	kstat_named_t	udp_in_recvtclass;

#ifdef DEBUG

	kstat_named_t	udp_data_conn;

	kstat_named_t	udp_data_notconn;

#endif

} udp_stat_t;

extern udp_stat_t	udp_statistics;

#define	UDP_STAT(x)		(udp_statistics.x.value.ui64++)

#define	UDP_STAT_UPDATE(x, n)	(udp_statistics.x.value.ui64 += (n))

#ifdef DEBUG

#define	UDP_DBGSTAT(x)		UDP_STAT(x)

#else

#define	UDP_DBGSTAT(x)

#endif /* DEBUG */

extern major_t	UDP6_MAJ;

extern int	udp_opt_default(queue_t *, t_scalar_t, t_scalar_t, uchar_t *);

extern int	udp_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *);

extern int	udp_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *,

		    uint_t *, uchar_t *, void *, cred_t *, mblk_t *);

extern int	udp_snmp_get(queue_t *, mblk_t *);

extern int	udp_snmp_set(queue_t *, t_scalar_t, t_scalar_t, uchar_t *, int);

extern void	udp_close_free(conn_t *);

extern void	udp_quiesce_conn(conn_t *);

extern void	udp_ddi_init(void);

extern void	udp_ddi_destroy(void);

extern void	udp_resume_bind(conn_t *, mblk_t *);

extern void	udp_conn_recv(conn_t *, mblk_t *);

extern boolean_t udp_compute_checksum(void);

extern void	udp_wput_data(queue_t *, mblk_t *, struct sockaddr *,

		    socklen_t);