initial user mode network support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@733 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 317 insertions, 0 deletions

diff --git a/slirp/ip.h b/slirp/ip.h
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+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ip.h	8.1 (Berkeley) 6/10/93
+ * ip.h,v 1.3 1994/08/21 05:27:30 paul Exp
+ */
+
+#ifndef _IP_H_
+#define _IP_H_
+
+#ifdef WORDS_BIGENDIAN
+# ifndef NTOHL
+#  define NTOHL(d)
+# endif
+# ifndef NTOHS
+#  define NTOHS(d)
+# endif
+# ifndef HTONL
+#  define HTONL(d)
+# endif
+# ifndef HTONS
+#  define HTONS(d)
+# endif
+#else
+# ifndef NTOHL
+#  define NTOHL(d) ((d) = ntohl((d)))
+# endif
+# ifndef NTOHS
+#  define NTOHS(d) ((d) = ntohs((u_int16_t)(d)))
+# endif
+# ifndef HTONL
+#  define HTONL(d) ((d) = htonl((d)))
+# endif
+# ifndef HTONS
+#  define HTONS(d) ((d) = htons((u_int16_t)(d)))
+# endif
+#endif
+
+typedef u_int32_t n_long;                 /* long as received from the net */
+
+/*
+ * Definitions for internet protocol version 4.
+ * Per RFC 791, September 1981.
+ */
+#define	IPVERSION	4
+
+/*
+ * Structure of an internet header, naked of options.
+ *
+ * We declare ip_len and ip_off to be short, rather than u_short
+ * pragmatically since otherwise unsigned comparisons can result
+ * against negative integers quite easily, and fail in subtle ways.
+ */
+struct ip {
+#ifdef WORDS_BIGENDIAN
+	u_int ip_v:4,			/* version */
+		ip_hl:4;		/* header length */
+#else
+	u_int ip_hl:4,		/* header length */
+		ip_v:4;			/* version */
+#endif
+	u_int8_t ip_tos;			/* type of service */
+	int16_t	ip_len;			/* total length */
+	u_int16_t	ip_id;			/* identification */
+	int16_t	ip_off;			/* fragment offset field */
+#define	IP_DF 0x4000			/* don't fragment flag */
+#define	IP_MF 0x2000			/* more fragments flag */
+#define	IP_OFFMASK 0x1fff		/* mask for fragmenting bits */
+	u_int8_t ip_ttl;			/* time to live */
+	u_int8_t ip_p;			/* protocol */
+	u_int16_t	ip_sum;			/* checksum */
+	struct	in_addr ip_src,ip_dst;	/* source and dest address */
+};
+
+#define	IP_MAXPACKET	65535		/* maximum packet size */
+
+/*
+ * Definitions for IP type of service (ip_tos)
+ */
+#define	IPTOS_LOWDELAY		0x10
+#define	IPTOS_THROUGHPUT	0x08
+#define	IPTOS_RELIABILITY	0x04
+
+/*
+ * Definitions for options.
+ */
+#define	IPOPT_COPIED(o)		((o)&0x80)
+#define	IPOPT_CLASS(o)		((o)&0x60)
+#define	IPOPT_NUMBER(o)		((o)&0x1f)
+
+#define	IPOPT_CONTROL		0x00
+#define	IPOPT_RESERVED1		0x20
+#define	IPOPT_DEBMEAS		0x40
+#define	IPOPT_RESERVED2		0x60
+
+#define	IPOPT_EOL		0		/* end of option list */
+#define	IPOPT_NOP		1		/* no operation */
+
+#define	IPOPT_RR		7		/* record packet route */
+#define	IPOPT_TS		68		/* timestamp */
+#define	IPOPT_SECURITY		130		/* provide s,c,h,tcc */
+#define	IPOPT_LSRR		131		/* loose source route */
+#define	IPOPT_SATID		136		/* satnet id */
+#define	IPOPT_SSRR		137		/* strict source route */
+
+/*
+ * Offsets to fields in options other than EOL and NOP.
+ */
+#define	IPOPT_OPTVAL		0		/* option ID */
+#define	IPOPT_OLEN		1		/* option length */
+#define IPOPT_OFFSET		2		/* offset within option */
+#define	IPOPT_MINOFF		4		/* min value of above */
+
+/*
+ * Time stamp option structure.
+ */
+struct	ip_timestamp {
+	u_int8_t	ipt_code;		/* IPOPT_TS */
+	u_int8_t	ipt_len;		/* size of structure (variable) */
+	u_int8_t	ipt_ptr;		/* index of current entry */
+#ifdef WORDS_BIGENDIAN
+	u_int	ipt_oflw:4,		/* overflow counter */
+		ipt_flg:4;		/* flags, see below */
+#else
+	u_int	ipt_flg:4,		/* flags, see below */
+		ipt_oflw:4;		/* overflow counter */
+#endif
+	union ipt_timestamp {
+		n_long	ipt_time[1];
+		struct	ipt_ta {
+			struct in_addr ipt_addr;
+			n_long ipt_time;
+		} ipt_ta[1];
+	} ipt_timestamp;
+};
+
+/* flag bits for ipt_flg */
+#define	IPOPT_TS_TSONLY		0		/* timestamps only */
+#define	IPOPT_TS_TSANDADDR	1		/* timestamps and addresses */
+#define	IPOPT_TS_PRESPEC	3		/* specified modules only */
+
+/* bits for security (not byte swapped) */
+#define	IPOPT_SECUR_UNCLASS	0x0000
+#define	IPOPT_SECUR_CONFID	0xf135
+#define	IPOPT_SECUR_EFTO	0x789a
+#define	IPOPT_SECUR_MMMM	0xbc4d
+#define	IPOPT_SECUR_RESTR	0xaf13
+#define	IPOPT_SECUR_SECRET	0xd788
+#define	IPOPT_SECUR_TOPSECRET	0x6bc5
+
+/*
+ * Internet implementation parameters.
+ */
+#define	MAXTTL		255		/* maximum time to live (seconds) */
+#define	IPDEFTTL	64		/* default ttl, from RFC 1340 */
+#define	IPFRAGTTL	60		/* time to live for frags, slowhz */
+#define	IPTTLDEC	1		/* subtracted when forwarding */
+
+#define	IP_MSS		576		/* default maximum segment size */
+
+#ifdef HAVE_SYS_TYPES32_H  /* Overcome some Solaris 2.x junk */
+#include <sys/types32.h>
+#else
+#if SIZEOF_CHAR_P == 4
+typedef caddr_t caddr32_t;
+#else
+typedef u_int32_t caddr32_t;
+#endif
+#endif
+
+#if SIZEOF_CHAR_P == 4
+typedef struct ipq *ipqp_32;
+typedef struct ipasfrag *ipasfragp_32;
+#else
+typedef caddr32_t ipqp_32;
+typedef caddr32_t ipasfragp_32;
+#endif
+
+/*
+ * Overlay for ip header used by other protocols (tcp, udp).
+ */
+struct ipovly {
+	caddr32_t	ih_next, ih_prev;	/* for protocol sequence q's */
+	u_int8_t	ih_x1;			/* (unused) */
+	u_int8_t	ih_pr;			/* protocol */
+	int16_t	ih_len;			/* protocol length */
+	struct	in_addr ih_src;		/* source internet address */
+	struct	in_addr ih_dst;		/* destination internet address */
+};
+
+/*
+ * Ip reassembly queue structure.  Each fragment
+ * being reassembled is attached to one of these structures.
+ * They are timed out after ipq_ttl drops to 0, and may also
+ * be reclaimed if memory becomes tight.
+ * size 28 bytes
+ */
+struct ipq {
+	ipqp_32 next,prev;	/* to other reass headers */
+	u_int8_t	ipq_ttl;		/* time for reass q to live */
+	u_int8_t	ipq_p;			/* protocol of this fragment */
+	u_int16_t	ipq_id;			/* sequence id for reassembly */
+	ipasfragp_32 ipq_next,ipq_prev;
+					/* to ip headers of fragments */
+	struct	in_addr ipq_src,ipq_dst;
+};
+
+/*
+ * Ip header, when holding a fragment.
+ *
+ * Note: ipf_next must be at same offset as ipq_next above
+ */
+struct	ipasfrag {
+#ifdef WORDS_BIGENDIAN
+	u_int	ip_v:4,
+ 		ip_hl:4;
+#else
+	u_int	ip_hl:4,
+		ip_v:4;
+#endif
+                                        /* BUG : u_int changed to u_int8_t.
+                                         * sizeof(u_int)==4 on linux 2.0
+					 */
+        u_int8_t ipf_mff;		/* XXX overlays ip_tos: use low bit
+					 * to avoid destroying tos (PPPDTRuu);
+					 * copied from (ip_off&IP_MF) */
+	int16_t	ip_len;
+	u_int16_t	ip_id;
+	int16_t	ip_off;
+	u_int8_t	ip_ttl;
+	u_int8_t	ip_p;
+	u_int16_t	ip_sum;
+	ipasfragp_32 ipf_next;		/* next fragment */
+	ipasfragp_32 ipf_prev;		/* previous fragment */
+};
+
+/*
+ * Structure stored in mbuf in inpcb.ip_options
+ * and passed to ip_output when ip options are in use.
+ * The actual length of the options (including ipopt_dst)
+ * is in m_len.
+ */
+#define MAX_IPOPTLEN	40
+
+struct ipoption {
+	struct	in_addr ipopt_dst;	/* first-hop dst if source routed */
+	int8_t	ipopt_list[MAX_IPOPTLEN];	/* options proper */
+};
+
+/*
+ * Structure attached to inpcb.ip_moptions and
+ * passed to ip_output when IP multicast options are in use.
+ */
+
+struct	ipstat {
+	u_long	ips_total;		/* total packets received */
+	u_long	ips_badsum;		/* checksum bad */
+	u_long	ips_tooshort;		/* packet too short */
+	u_long	ips_toosmall;		/* not enough data */
+	u_long	ips_badhlen;		/* ip header length < data size */
+	u_long	ips_badlen;		/* ip length < ip header length */
+	u_long	ips_fragments;		/* fragments received */
+	u_long	ips_fragdropped;	/* frags dropped (dups, out of space) */
+	u_long	ips_fragtimeout;	/* fragments timed out */
+	u_long	ips_forward;		/* packets forwarded */
+	u_long	ips_cantforward;	/* packets rcvd for unreachable dest */
+	u_long	ips_redirectsent;	/* packets forwarded on same net */
+	u_long	ips_noproto;		/* unknown or unsupported protocol */
+	u_long	ips_delivered;		/* datagrams delivered to upper level*/
+	u_long	ips_localout;		/* total ip packets generated here */
+	u_long	ips_odropped;		/* lost packets due to nobufs, etc. */
+	u_long	ips_reassembled;	/* total packets reassembled ok */
+	u_long	ips_fragmented;		/* datagrams successfully fragmented */
+	u_long	ips_ofragments;		/* output fragments created */
+	u_long	ips_cantfrag;		/* don't fragment flag was set, etc. */
+	u_long	ips_badoptions;		/* error in option processing */
+	u_long	ips_noroute;		/* packets discarded due to no route */
+	u_long	ips_badvers;		/* ip version != 4 */
+	u_long	ips_rawout;		/* total raw ip packets generated */
+	u_long	ips_unaligned;		/* times the ip packet was not aligned */
+};
+
+extern struct	ipstat	ipstat;
+extern struct	ipq	ipq;			/* ip reass. queue */
+extern u_int16_t	ip_id;				/* ip packet ctr, for ids */
+extern int	ip_defttl;			/* default IP ttl */
+
+#endif