ipv4_impl.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Internal IPv4 implementation-specific definitions
*/
#ifndef _IPV4_IMPL_H
#define _IPV4_IMPL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#define FRAG_MAX (40) /* max number of IP fragments per datagram */
#define FRAG_SUCCESS (0) /* datagram reassembled ok */
#define FRAG_DUP (1) /* duplicate ip fragment */
#define FRAG_NOSLOTS (2) /* no more ip fragment slots */
#define FRAG_ATTEMPTS 1 /* Try twice to get all the fragments */
/*
* IP fragmentation data structure
*/
struct ip_frag {
int16_t more; /* Fragment bit (TRUE == MF, FALSE == No more */
int16_t offset; /* Offset within the encapsulated datagram */
mblk_t *mp; /* Fragment including IP header */
uint16_t ipid; /* fragment ident */
int16_t iplen; /* IP datagram's length */
int16_t iphlen; /* Len of IP header */
uint8_t ipp; /* IP protocol */
};
/*
* true offset is in 8 octet units. The high order 3 bits of the IP header
* offset field are therefore used for fragmentation flags. Shift these
* bits off to produce the true offset. The high order flag bit is unused
* (what would be considered the sign bit). Still, we cast the callers
* value as an unsigned quantity to ensure it is treated as positive.
*/
#define IPV4_OFFSET(a) ((uint16_t)(a) << 3)
#define IPV4_VERSION 4
#define IPH_HDR_LENGTH(iph) (((struct ip *)(iph))->ip_hl << 2)
/* ECN code points for IPv4 TOS byte and IPv6 traffic class octet. */
#define IPH_ECN_NECT 0x0 /* Not ECN-Capabable Transport */
#define IPH_ECN_ECT1 0x1 /* ECN-Capable Transport, ECT(1) */
#define IPH_ECN_ECT0 0x2 /* ECN-Capable Transport, ECT(0) */
#define IPH_ECN_CE 0x3 /* ECN-Congestion Experienced (CE) */
#define IPV4_VERSION 4
#define IP_VERSION IPV4_VERSION
#define IP_SIMPLE_HDR_LENGTH_IN_WORDS 5
#define IP_SIMPLE_HDR_LENGTH 20
#define IP_MAX_HDR_LENGTH 60
#define IP_MIN_MTU (IP_MAX_HDR_LENGTH + 8) /* 68 bytes */
/*
* IP routing table. IP addresses are in network-order.
*/
struct routing {
struct in_addr dest;
struct in_addr gateway;
uint8_t flag;
};
extern void ipv4_raw_socket(struct inetboot_socket *, uint8_t);
extern void ipv4_socket_init(struct inetboot_socket *);
extern int ipv4_header_len(struct inetgram *);
extern int ipv4_input(int);
extern int ipv4_output(int, struct inetgram *);
extern int ipv4_tcp_output(int, mblk_t *);
extern struct in_addr *ipv4_get_route(uint8_t, struct in_addr *,
struct in_addr *);
#ifdef __cplusplus
}
#endif
#endif /* _IPV4_IMPL_H */