1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2002-2003 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 *
26 * Internal socket-specific definitions
27 */
28
29#ifndef _SOCKET_IMPL_H
30#define	_SOCKET_IMPL_H
31
32#pragma ident	"%Z%%M%	%I%	%E% SMI"
33
34#ifdef	__cplusplus
35extern "C" {
36#endif
37
38#include <sys/types.h>
39#include <sys/socket.h>
40
41/*
42 * Socket support definitions
43 */
44
45#define	MAXSOCKET	(10)
46#define	SOCKETTYPE	(65536)
47#define	MEDIA_LVL	0
48#define	NETWORK_LVL	1
49#define	TRANSPORT_LVL	2
50#define	APP_LVL		3
51
52/* Anonymous ports assigned by socket. */
53#define	SMALLEST_ANON_PORT	32768
54#define	LARGEST_ANON_PORT	((64 * 1024) - 1)
55
56/* Socket state bits. */
57#define	SS_ISCONNECTED		0x000001 /* socket connected to a peer */
58#define	SS_ISCONNECTING		0x000002 /* in process of connecting to peer */
59
60#define	SS_CANTRCVMORE		0x000010 /* can't receive more data from peer */
61#define	SS_CANTSENDMORE		0x000008 /* can't send more data to peer */
62
63enum { FALSE, TRUE };
64enum SockType { INETBOOT_UNUSED, INETBOOT_DGRAM, INETBOOT_RAW,
65    INETBOOT_STREAM };
66enum Ports { SOURCE, DESTINATION };
67#define	FD_TO_SOCKET(v)	((v) - SOCKETTYPE)
68
69/*
70 * Message block descriptor copied from usr/src/uts/common/sys/stream.h.
71 * We need to do that to simplify the porting of TCP code from core
72 * kernel to inetboot.  Note that fields which are not used by TCP
73 * code are removed.
74 */
75typedef struct  msgb {
76	struct  msgb	*b_next;
77	struct  msgb	*b_prev;
78	struct  msgb	*b_cont;
79	unsigned char	*b_rptr;
80	unsigned char	*b_wptr;
81	unsigned char	*b_datap;
82	size_t		b_size;
83} mblk_t;
84
85/* Modified stream routines to ease TCP porting. */
86extern mblk_t *allocb(size_t, uint_t);
87extern mblk_t *dupb(mblk_t *);
88extern void freeb(mblk_t *);
89extern void freemsg(mblk_t *);
90extern size_t msgdsize(mblk_t *);
91
92/*
93 * "target" is needed for input prior to IP address assignment. It may
94 * seem redundant given the binding information contained in the socket,
95 * but that's only true if we have an IP address. If we don't, and we
96 * try DHCP, we'll try to udp checksum using INADDR_ANY as the destination
97 * IP address, when in fact the destination IP address was the IP address
98 * we were OFFERED/Assigned.
99 */
100struct inetgram {
101	/* Common */
102	struct sockaddr_in	igm_saddr;	/* source address info */
103	int			igm_level;	/* Stack level (LVL) of data */
104	mblk_t			*igm_mp;
105	struct inetgram		*igm_next;	/* next inetgram in list */
106	union {
107		struct {
108			/* Input specific */
109			struct in_addr	in_t;
110			uint16_t	in_i;
111		} _IN_un;
112		struct {
113			/* Output specific */
114			struct in_addr	out_r;
115			int		out_f;
116		} _OUT_un;
117	} _i_o_inet;
118#define	igm_target	_i_o_inet._IN_un.in_t	/* See above comment block */
119#define	igm_id		_i_o_inet._IN_un.in_i	/* IP id */
120#define	igm_router	_i_o_inet._OUT_un.out_r	/* first router IP  ... */
121#define	igm_oflags	_i_o_inet._OUT_un.out_f	/* flag: 0 or MSG_DONTROUTE */
122};
123
124struct inetboot_socket {
125	enum SockType		type;		/* socket type */
126	uint8_t			proto;		/* ip protocol */
127	int			out_flags;	/* 0 or MSG_DONTROUTE */
128	boolean_t		bound;		/* boolean */
129	uint32_t		so_state;	/* Socket state */
130	int			so_error;	/* Socket error */
131	struct sockaddr_in	bind;		/* Binding info */
132	struct sockaddr_in	remote;		/* Remote address */
133	struct inetgram		*inq;		/* input queue */
134	int			so_sndbuf;	/* max send buf size */
135	int			so_rcvbuf;	/* max receive buf size */
136	struct linger		so_linger;	/* close linger time */
137	uint32_t		in_timeout;	/* Input timeout (msec) */
138	uint32_t		so_opt;		/* socket level option */
139	int			(*headerlen[APP_LVL])(struct inetgram *);
140	int			(*input[APP_LVL])(int);
141	int			(*output[APP_LVL])(int, struct inetgram *);
142	int			(*close[APP_LVL])(int);
143	in_port_t		(*ports)(uint16_t *, enum Ports);
144	void			*pcb;		/* Protocol control block */
145};
146
147extern struct inetboot_socket	sockets[MAXSOCKET];
148
149extern void add_grams(struct inetgram **, struct inetgram *);
150extern void del_gram(struct inetgram **, struct inetgram *, int);
151extern void nuke_grams(struct inetgram **);
152extern struct inetgram *last_gram(struct inetgram *);
153
154extern int so_check_fd(int, int *);
155
156#ifdef	__cplusplus
157}
158#endif
159
160#endif /* _SOCKET_IMPL_H */
161