net.h@ 96550

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1	/** @file
2	* IPRT - Network Protocols.
3	*/
4
5	/*
6	* Copyright (C) 2008-2022 Oracle and/or its affiliates.
7	*
8	* This file is part of VirtualBox base platform packages, as
9	* available from https://www.virtualbox.org.
10	*
11	* This program is free software; you can redistribute it and/or
12	* modify it under the terms of the GNU General Public License
13	* as published by the Free Software Foundation, in version 3 of the
14	* License.
15	*
16	* This program is distributed in the hope that it will be useful, but
17	* WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19	* General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with this program; if not, see <https://www.gnu.org/licenses>.
23	*
24	* The contents of this file may alternatively be used under the terms
25	* of the Common Development and Distribution License Version 1.0
26	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
27	* in the VirtualBox distribution, in which case the provisions of the
28	* CDDL are applicable instead of those of the GPL.
29	*
30	* You may elect to license modified versions of this file under the
31	* terms and conditions of either the GPL or the CDDL or both.
32	*
33	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
34	*/
35
36	#ifndef IPRT_INCLUDED_net_h
37	#define IPRT_INCLUDED_net_h
38	#ifndef RT_WITHOUT_PRAGMA_ONCE
39	# pragma once
40	#endif
41
42	#include <iprt/cdefs.h>
43	#include <iprt/types.h>
44	#include <iprt/assert.h>
45
46
47	RT_C_DECLS_BEGIN
48
49	/** @defgroup grp_rt_net RTNet - Network Protocols
50	* @ingroup grp_rt
51	* @{
52	*/
53
54	/**
55	* Converts an stringified Ethernet MAC address into the RTMAC representation.
56	*
57	* @todo This should be move to some generic part of the runtime.
58	*
59	* @returns VINF_SUCCESS on success, VERR_GETOPT_INVALID_ARGUMENT_FORMAT on
60	* failure.
61	*
62	* @param pszAddr The address string to convert.
63	* @param pMacAddr Where to store the result.
64	*/
65	RTDECL(int) RTNetStrToMacAddr(const char *pszAddr, PRTMAC pMacAddr);
66
67	/**
68	* IPv4 address.
69	*/
70	typedef RTUINT32U RTNETADDRIPV4;
71	AssertCompileSize(RTNETADDRIPV4, 4);
72	/** Pointer to a IPv4 address. */
73	typedef RTNETADDRIPV4 *PRTNETADDRIPV4;
74	/** Pointer to a const IPv4 address. */
75	typedef RTNETADDRIPV4 const *PCRTNETADDRIPV4;
76
77	/**
78	* Tests if the given string is an IPv4 address.
79	*
80	* @returns boolean.
81	* @param pcszAddr String which may be an IPv4 address.
82	*/
83	RTDECL(bool) RTNetIsIPv4AddrStr(const char *pcszAddr);
84
85	/**
86	* Tests if the given string is a wildcard IPv4 address.
87	*
88	* @returns boolean.
89	* @param pcszAddr String which may be an IPv4 address.
90	*/
91	RTDECL(bool) RTNetStrIsIPv4AddrAny(const char *pcszAddr);
92
93	/**
94	* Parses dotted-decimal IPv4 address into RTNETADDRIPV4 representation.
95	*
96	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
97	* failure.
98	*
99	* @param pcszAddr The value to convert.
100	* @param ppszNext Where to store the pointer to the first char
101	* following the address. (Optional)
102	* @param pAddr Where to store the result.
103	*/
104	RTDECL(int) RTNetStrToIPv4AddrEx(const char pcszAddr, PRTNETADDRIPV4 pAddr, char *ppszNext);
105
106	/**
107	* Parses dotted-decimal IPv4 address into RTNETADDRIPV4 representation.
108	* Leading and trailing whitespace is ignored.
109	*
110	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
111	* failure.
112	*
113	* @param pcszAddr The value to convert.
114	* @param pAddr Where to store the result.
115	*/
116	RTDECL(int) RTNetStrToIPv4Addr(const char *pcszAddr, PRTNETADDRIPV4 pAddr);
117
118	/**
119	* Parses dotted-decimal IPv4 CIDR notation into RTNETADDRIPV4
120	* representation and prefix length. Missing prefix specification is
121	* treated as exact address specification (prefix length 32). Leading
122	* and trailing whitespace is ignored.
123	*
124	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
125	* failure.
126	*
127	* @param pcszAddr The value to convert.
128	* @param pAddr Where to store the address.
129	* @param piPrefix Where to store the prefix length;
130	*/
131	RTDECL(int) RTNetStrToIPv4Cidr(const char pcszAddr, PRTNETADDRIPV4 pAddr, int piPrefix);
132
133	/**
134	* Verifies that RTNETADDRIPV4 is a valid contiguous netmask and
135	* computes its prefix length.
136	*
137	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
138	* failure.
139	*
140	* @param pMask The netmask to verify and convert.
141	* @param piPrefix Where to store the prefix length. (Optional)
142	*/
143	RTDECL(int) RTNetMaskToPrefixIPv4(PCRTNETADDRIPV4 pMask, int *piPrefix);
144
145	/**
146	* Computes netmask corresponding to the prefix length.
147	*
148	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
149	* failure.
150	*
151	* @param iPrefix The prefix to convert.
152	* @param pMask Where to store the netmask.
153	*/
154	RTDECL(int) RTNetPrefixToMaskIPv4(int iPrefix, PRTNETADDRIPV4 pMask);
155
156
157	/**
158	* IPv6 address.
159	*/
160	typedef RTUINT128U RTNETADDRIPV6;
161	AssertCompileSize(RTNETADDRIPV6, 16);
162	/** Pointer to a IPv6 address. */
163	typedef RTNETADDRIPV6 *PRTNETADDRIPV6;
164	/** Pointer to a const IPv6 address. */
165	typedef RTNETADDRIPV6 const *PCRTNETADDRIPV6;
166
167	/**
168	* Tests if the given string is a valid IPv6 address.
169	*
170	* @returns @c true if it is, @c false if not.
171	* @param pszAddress String which may be an IPv6 address.
172	*/
173	RTDECL(bool) RTNetIsIPv6AddrStr(const char *pszAddress);
174
175	/**
176	* Tests if the given string is a wildcard IPv6 address.
177	*
178	* @returns @c true if it is, @c false if not.
179	* @param pszAddress String which may be an IPv6 address.
180	*/
181	RTDECL(bool) RTNetStrIsIPv6AddrAny(const char *pszAddress);
182
183	/**
184	* Parses IPv6 address into RTNETADDRIPV6 representation.
185	*
186	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
187	* failure.
188	*
189	* @param pcszAddr The value to convert.
190	* @param ppszNext Where to store the pointer to the first char
191	* following the address. (Optional)
192	* @param pAddr Where to store the result.
193	*/
194	RTDECL(int) RTNetStrToIPv6AddrEx(const char pcszAddr, PRTNETADDRIPV6 pAddr, char *ppszNext);
195
196	/**
197	* Parses IPv6 address into RTNETADDRIPV6 representation.
198	* Leading and trailing whitespace is ignored.
199	*
200	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
201	* failure.
202	*
203	* @param pcszAddr The value to convert.
204	* @param ppszZone Where to store the pointer to the first char
205	* of the zone id. NULL is stored if there is
206	* no zone id.
207	* @param pAddr Where to store the result.
208	*/
209	RTDECL(int) RTNetStrToIPv6Addr(const char pcszAddr, PRTNETADDRIPV6 pAddr, char *ppszZone);
210
211	/**
212	* Verifies that RTNETADDRIPV6 is a valid contiguous netmask and
213	* computes its prefix length.
214	*
215	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
216	* failure.
217	*
218	* @param pMask The netmask to verify and convert.
219	* @param piPrefix Where to store the prefix length. (Optional)
220	*/
221	RTDECL(int) RTNetMaskToPrefixIPv6(PCRTNETADDRIPV6 pMask, int *piPrefix);
222
223	/**
224	* Computes netmask corresponding to the prefix length.
225	*
226	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
227	* failure.
228	*
229	* @param iPrefix The prefix to convert.
230	* @param pMask Where to store the netmask.
231	*/
232	RTDECL(int) RTNetPrefixToMaskIPv6(int iPrefix, PRTNETADDRIPV6 pMask);
233
234	/**
235	* Parses IPv6 prefix notation into RTNETADDRIPV6 representation and
236	* prefix length. Missing prefix specification is treated as exact
237	* address specification (prefix length 128). Leading and trailing
238	* whitespace is ignored.
239	*
240	* "CIDR" in the name is a misnomer as IPv6 doesn't have network
241	* classes, but is parallel to the IPv4 name (and naming things is
242	* hard).
243	*
244	* @returns VINF_SUCCESS on success, VERR_INVALID_PARAMETER on
245	* failure.
246	*
247	* @param pcszAddr The value to convert.
248	* @param pAddr Where to store the address.
249	* @param piPrefix Where to store the prefix length;
250	*/
251	RTDECL(int) RTNetStrToIPv6Cidr(const char pcszAddr, PRTNETADDRIPV6 pAddr, int piPrefix);
252
253
254	/**
255	* IPX address.
256	*/
257	#pragma pack(1)
258	typedef struct RTNETADDRIPX
259	{
260	/** The network ID. */
261	uint32_t Network;
262	/** The node ID. (Defaults to the MAC address apparently.) */
263	RTMAC Node;
264	} RTNETADDRIPX;
265	#pragma pack()
266	AssertCompileSize(RTNETADDRIPX, 4+6);
267	/** Pointer to an IPX address. */
268	typedef RTNETADDRIPX *PRTNETADDRIPX;
269	/** Pointer to a const IPX address. */
270	typedef RTNETADDRIPX const *PCRTNETADDRIPX;
271
272	/**
273	* Network address union.
274	*
275	* @remarks The size of this structure may change in the future.
276	*/
277	typedef union RTNETADDRU
278	{
279	/** 64-bit view. */
280	uint64_t au64[2];
281	/** 32-bit view. */
282	uint32_t au32[4];
283	/** 16-bit view. */
284	uint16_t au16[8];
285	/** 8-bit view. */
286	uint8_t au8[16];
287	/** IPv4 view. */
288	RTNETADDRIPV4 IPv4;
289	#ifndef IPv6 /* Work around X11 and RDP defining IPv6 to 1. */
290	/** IPv6 view. */
291	RTNETADDRIPV6 IPv6;
292	#endif
293	/** IPX view. */
294	RTNETADDRIPX Ipx;
295	/** MAC address view. */
296	RTMAC Mac;
297	} RTNETADDRU;
298	AssertCompileSize(RTNETADDRU, 16);
299	/** Pointer to an address union. */
300	typedef RTNETADDRU *PRTNETADDRU;
301	/** Pointer to a const address union. */
302	typedef RTNETADDRU const *PCRTNETADDRU;
303
304	/**
305	* Network address type.
306	*
307	* @remarks The value assignments may change in the future.
308	*/
309	typedef enum RTNETADDRTYPE
310	{
311	/** The invalid 0 entry. */
312	RTNETADDRTYPE_INVALID = 0,
313	/** IP version 4. */
314	RTNETADDRTYPE_IPV4,
315	/** IP version 6. */
316	RTNETADDRTYPE_IPV6,
317	/** IPX. */
318	RTNETADDRTYPE_IPX,
319	/** MAC address. */
320	RTNETADDRTYPE_MAC,
321	/** The end of the valid values. */
322	RTNETADDRTYPE_END,
323	/** The usual 32-bit hack. */
324	RTNETADDRTYPE_32_BIT_HACK = 0x7fffffff
325	} RTNETADDRTYPE;
326	/** Pointer to a network address type. */
327	typedef RTNETADDRTYPE *PRTNETADDRTYPE;
328	/** Pointer to a const network address type. */
329	typedef RTNETADDRTYPE const *PCRTNETADDRTYPE;
330
331	/**
332	* Network address.
333	*
334	* @remarks The size and type values may change.
335	*/
336	typedef struct RTNETADDR
337	{
338	/** The address union. */
339	RTNETADDRU uAddr;
340	/** Indicates which view of @a u that is valid. */
341	RTNETADDRTYPE enmType;
342	/** The port number for IPv4 and IPv6 addresses. This is set to
343	* RTNETADDR_NA_PORT if not applicable. */
344	uint32_t uPort;
345	} RTNETADDR;
346	/** Pointer to a network address. */
347	typedef RTNETADDR *PRTNETADDR;
348	/** Pointer to a const network address. */
349	typedef RTNETADDR const *PCRTNETADDR;
350
351	/** The not applicable value of RTNETADDR::uPort value use to inid. */
352	#define RTNETADDR_PORT_NA UINT32_MAX
353
354	/**
355	* Ethernet header.
356	*/
357	#pragma pack(1)
358	typedef struct RTNETETHERHDR
359	{
360	RTMAC DstMac;
361	RTMAC SrcMac;
362	/** Ethernet frame type or frame size, depending on the kind of ethernet.
363	* This is big endian on the wire. */
364	uint16_t EtherType;
365	} RTNETETHERHDR;
366	#pragma pack()
367	AssertCompileSize(RTNETETHERHDR, 14);
368	/** Pointer to an ethernet header. */
369	typedef RTNETETHERHDR *PRTNETETHERHDR;
370	/** Pointer to a const ethernet header. */
371	typedef RTNETETHERHDR const *PCRTNETETHERHDR;
372
373	/** @name EtherType (RTNETETHERHDR::EtherType)
374	* @{ */
375	#define RTNET_ETHERTYPE_IPV4 UINT16_C(0x0800)
376	#define RTNET_ETHERTYPE_ARP UINT16_C(0x0806)
377	#define RTNET_ETHERTYPE_IPV6 UINT16_C(0x86dd)
378	#define RTNET_ETHERTYPE_VLAN UINT16_C(0x8100)
379	#define RTNET_ETHERTYPE_IPX_1 UINT16_C(0x8037)
380	#define RTNET_ETHERTYPE_IPX_2 UINT16_C(0x8137)
381	#define RTNET_ETHERTYPE_IPX_3 UINT16_C(0x8138)
382	/** @} */
383
384
385	/**
386	* IPv4 header.
387	* All is bigendian on the wire.
388	*/
389	#pragma pack(1)
390	typedef struct RTNETIPV4
391	{
392	#ifdef RT_BIG_ENDIAN
393	unsigned int ip_v : 4;
394	unsigned int ip_hl : 4;
395	unsigned int ip_tos : 8;
396	unsigned int ip_len : 16;
397	#else
398	/** 00:0 - Header length given as a 32-bit word count. */
399	unsigned int ip_hl : 4;
400	/** 00:4 - Header version. */
401	unsigned int ip_v : 4;
402	/** 01 - Type of service. */
403	unsigned int ip_tos : 8;
404	/** 02 - Total length (header + data). */
405	unsigned int ip_len : 16;
406	#endif
407	/** 04 - Packet idenficiation. */
408	uint16_t ip_id;
409	/** 06 - Offset if fragmented. */
410	uint16_t ip_off;
411	/** 08 - Time to live. */
412	uint8_t ip_ttl;
413	/** 09 - Protocol. */
414	uint8_t ip_p;
415	/** 0a - Header check sum. */
416	uint16_t ip_sum;
417	/** 0c - Source address. */
418	RTNETADDRIPV4 ip_src;
419	/** 10 - Destination address. */
420	RTNETADDRIPV4 ip_dst;
421	/** 14 - Options (optional). */
422	uint32_t ip_options[1];
423	} RTNETIPV4;
424	#pragma pack()
425	AssertCompileSize(RTNETIPV4, 6 * 4);
426	/** Pointer to a IPv4 header. */
427	typedef RTNETIPV4 *PRTNETIPV4;
428	/** Pointer to a const IPv4 header. */
429	typedef RTNETIPV4 const *PCRTNETIPV4;
430
431	/** The minimum IPv4 header length (in bytes).
432	* Up to and including RTNETIPV4::ip_dst. */
433	#define RTNETIPV4_MIN_LEN (20)
434
435
436	/** @name IPv4 Protocol Numbers
437	* @{ */
438	/** IPv4: ICMP */
439	#define RTNETIPV4_PROT_ICMP (1)
440	/** IPv4: TCP */
441	#define RTNETIPV4_PROT_TCP (6)
442	/** IPv4: UDP */
443	#define RTNETIPV4_PROT_UDP (17)
444	/** @} */
445
446	/** @name Common IPv4 Port Assignments
447	* @{
448	*/
449	/** Boostrap Protocol / DHCP) Server. */
450	#define RTNETIPV4_PORT_BOOTPS (67)
451	/** Boostrap Protocol / DHCP) Client. */
452	#define RTNETIPV4_PORT_BOOTPC (68)
453	/** @} */
454
455	/** @name IPv4 Flags
456	* @{ */
457	/** IPv4: Don't fragment */
458	#define RTNETIPV4_FLAGS_DF (0x4000)
459	/** IPv4: More fragments */
460	#define RTNETIPV4_FLAGS_MF (0x2000)
461	/** @} */
462
463	RTDECL(uint16_t) RTNetIPv4HdrChecksum(PCRTNETIPV4 pIpHdr);
464	RTDECL(bool) RTNetIPv4IsHdrValid(PCRTNETIPV4 pIpHdr, size_t cbHdrMax, size_t cbPktMax, bool fChecksum);
465	RTDECL(uint32_t) RTNetIPv4PseudoChecksum(PCRTNETIPV4 pIpHdr);
466	RTDECL(uint32_t) RTNetIPv4PseudoChecksumBits(RTNETADDRIPV4 SrcAddr, RTNETADDRIPV4 DstAddr, uint8_t bProtocol, uint16_t cbPkt);
467	RTDECL(uint32_t) RTNetIPv4AddDataChecksum(void const pvData, size_t cbData, uint32_t u32Sum, bool pfOdd);
468	RTDECL(uint16_t) RTNetIPv4FinalizeChecksum(uint32_t u32Sum);
469
470
471	/**
472	* IPv6 header.
473	* All is bigendian on the wire.
474	*/
475	#pragma pack(1)
476	typedef struct RTNETIPV6
477	{
478	/** Version (4 bits), Traffic Class (8 bits) and Flow Lable (20 bits).
479	* @todo this is probably mislabeled - ip6_flow vs. ip6_vfc, fix later. */
480	uint32_t ip6_vfc;
481	/** 04 - Payload length, including extension headers. */
482	uint16_t ip6_plen;
483	/** 06 - Next header type (RTNETIPV4_PROT_XXX). */
484	uint8_t ip6_nxt;
485	/** 07 - Hop limit. */
486	uint8_t ip6_hlim;
487	/** xx - Source address. */
488	RTNETADDRIPV6 ip6_src;
489	/** xx - Destination address. */
490	RTNETADDRIPV6 ip6_dst;
491	} RTNETIPV6;
492	#pragma pack()
493	AssertCompileSize(RTNETIPV6, 8 + 16 + 16);
494	/** Pointer to a IPv6 header. */
495	typedef RTNETIPV6 *PRTNETIPV6;
496	/** Pointer to a const IPv6 header. */
497	typedef RTNETIPV6 const *PCRTNETIPV6;
498
499	/** The minimum IPv6 header length (in bytes).
500	* Up to and including RTNETIPV6::ip6_dst. */
501	#define RTNETIPV6_MIN_LEN (40)
502	#define RTNETIPV6_ICMPV6_ND_WITH_LLA_OPT_MIN_LEN (32)
503
504	RTDECL(uint32_t) RTNetIPv6PseudoChecksum(PCRTNETIPV6 pIpHdr);
505	RTDECL(uint32_t) RTNetIPv6PseudoChecksumEx(PCRTNETIPV6 pIpHdr, uint8_t bProtocol, uint16_t cbPkt);
506	RTDECL(uint32_t) RTNetIPv6PseudoChecksumBits(PCRTNETADDRIPV6 pSrcAddr, PCRTNETADDRIPV6 pDstAddr,
507	uint8_t bProtocol, uint16_t cbPkt);
508
509
510	/**
511	* UDP header.
512	*/
513	#pragma pack(1)
514	typedef struct RTNETUDP
515	{
516	/** The source port. */
517	uint16_t uh_sport;
518	/** The destination port. */
519	uint16_t uh_dport;
520	/** The length of the UDP header and associated data. */
521	uint16_t uh_ulen;
522	/** The checksum of the pseudo header, the UDP header and the data. */
523	uint16_t uh_sum;
524	} RTNETUDP;
525	#pragma pack()
526	AssertCompileSize(RTNETUDP, 8);
527	/** Pointer to an UDP header. */
528	typedef RTNETUDP *PRTNETUDP;
529	/** Pointer to a const UDP header. */
530	typedef RTNETUDP const *PCRTNETUDP;
531
532	/** The minimum UDP packet length (in bytes). (RTNETUDP::uh_ulen) */
533	#define RTNETUDP_MIN_LEN (8)
534
535	RTDECL(uint16_t) RTNetUDPChecksum(uint32_t u32Sum, PCRTNETUDP pUdpHdr);
536	RTDECL(uint32_t) RTNetIPv4AddUDPChecksum(PCRTNETUDP pUdpHdr, uint32_t u32Sum);
537	RTDECL(uint16_t) RTNetIPv4UDPChecksum(PCRTNETIPV4 pIpHdr, PCRTNETUDP pUdpHdr, void const *pvData);
538	RTDECL(bool) RTNetIPv4IsUDPSizeValid(PCRTNETIPV4 pIpHdr, PCRTNETUDP pUdpHdr, size_t cbPktMax);
539	RTDECL(bool) RTNetIPv4IsUDPValid(PCRTNETIPV4 pIpHdr, PCRTNETUDP pUdpHdr, void const *pvData, size_t cbPktMax, bool fChecksum);
540
541
542	/**
543	* IPv4 BOOTP / DHCP packet.
544	*/
545	#pragma pack(1)
546	typedef struct RTNETBOOTP
547	{
548	/** 00 - The packet opcode (RTNETBOOTP_OP_). /
549	uint8_t bp_op;
550	/** 01 - Hardware address type. Same as RTNETARPHDR::ar_htype. */
551	uint8_t bp_htype;
552	/** 02 - Hardware address length. */
553	uint8_t bp_hlen;
554	/** 03 - Gateway hops. */
555	uint8_t bp_hops;
556	/** 04 - Transaction ID. */
557	uint32_t bp_xid;
558	/** 08 - Seconds since boot started. */
559	uint16_t bp_secs;
560	/** 0a - Unused (BOOTP) / Flags (DHCP) (RTNET_DHCP_FLAGS_). /
561	uint16_t bp_flags;
562	/** 0c - Client IPv4 address. */
563	RTNETADDRIPV4 bp_ciaddr;
564	/** 10 - Your IPv4 address. */
565	RTNETADDRIPV4 bp_yiaddr;
566	/** 14 - Server IPv4 address. */
567	RTNETADDRIPV4 bp_siaddr;
568	/** 18 - Gateway IPv4 address. */
569	RTNETADDRIPV4 bp_giaddr;
570	/** 1c - Client hardware address. */
571	union
572	{
573	uint8_t au8[16];
574	RTMAC Mac;
575	} bp_chaddr;
576	/** 2c - Server name. */
577	uint8_t bp_sname[64];
578	/** 6c - File name / more DHCP options. */
579	uint8_t bp_file[128];
580	/** ec - Vendor specific area (BOOTP) / Options (DHCP).
581	* @remark This is really 312 bytes in the DHCP version. */
582	union
583	{
584	uint8_t au8[128];
585	struct DHCP
586	{
587	/** ec - The DHCP cookie (RTNET_DHCP_COOKIE). */
588	uint32_t dhcp_cookie;
589	/** f0 - The DHCP options. */
590	uint8_t dhcp_opts[124];
591	} Dhcp;
592	} bp_vend;
593
594	} RTNETBOOTP;
595	#pragma pack()
596	AssertCompileSize(RTNETBOOTP, 0xec + 128);
597	/** Pointer to a BOOTP / DHCP packet. */
598	typedef RTNETBOOTP *PRTNETBOOTP;
599	/** Pointer to a const BOOTP / DHCP packet. */
600	typedef RTNETBOOTP const *PCRTNETBOOTP;
601
602	/** Minimum BOOTP packet length. For quick validation, no standard thing really. */
603	#define RTNETBOOTP_MIN_LEN 0xec
604	/** Minimum DHCP packet length. For quick validation, no standard thing really. */
605	#define RTNETBOOTP_DHCP_MIN_LEN 0xf1
606
607	/** The normal size of the a DHCP packet (i.e. a RTNETBOOTP).
608	* Same as RTNET_DHCP_OPT_SIZE, just expressed differently. */
609	#define RTNET_DHCP_NORMAL_SIZE (0xec + 4 + RTNET_DHCP_OPT_SIZE)
610	/** The normal size of RTNETBOOTP::bp_vend::Dhcp::dhcp_opts. */
611	#define RTNET_DHCP_OPT_SIZE (312 - 4)
612
613	/** @name BOOTP packet opcode values
614	* @{ */
615	#define RTNETBOOTP_OP_REQUEST 1
616	#define RTNETBOOTP_OP_REPLY 2
617	/** @} */
618
619	/** @name DHCP flags (RTNETBOOTP::bp_flags)
620	* @{ */
621	#define RTNET_DHCP_FLAGS_NO_BROADCAST UINT16_C(0x8000) /** @todo check test!!! */
622	/** @} */
623
624	/** The DHCP cookie (network endian). */
625	#define RTNET_DHCP_COOKIE UINT32_C(0x63825363)
626
627	/**
628	* An IPv4 DHCP option header.
629	*/
630	typedef struct RTNETDHCPOPT
631	{
632	/** 00 - The DHCP option. */
633	uint8_t dhcp_opt;
634	/** 01 - The data length (excluding this header). */
635	uint8_t dhcp_len;
636	/* 02 - The option data follows here, optional and of variable length. */
637	} RTNETDHCPOPT;
638	AssertCompileSize(RTNETDHCPOPT, 2);
639	/** Pointer to a DHCP option header. */
640	typedef RTNETDHCPOPT *PRTNETDHCPOPT;
641	/** Pointer to a const DHCP option header. */
642	typedef RTNETDHCPOPT const *PCRTNETDHCPOPT;
643
644	/** @name DHCP options
645	* @{ */
646	/** 1 byte padding, this has no dhcp_len field. */
647	#define RTNET_DHCP_OPT_PAD 0
648
649	/** The subnet mask. */
650	#define RTNET_DHCP_OPT_SUBNET_MASK 1
651	/** The time offset. */
652	#define RTNET_DHCP_OPT_TIME_OFFSET 2
653	/** The routers for the subnet. */
654	#define RTNET_DHCP_OPT_ROUTERS 3
655	/** Domain Name Server. */
656	#define RTNET_DHCP_OPT_DNS 6
657	/** Host name. */
658	#define RTNET_DHCP_OPT_HOST_NAME 12
659	/** Domain name. */
660	#define RTNET_DHCP_OPT_DOMAIN_NAME 15
661
662	/** The requested address. */
663	#define RTNET_DHCP_OPT_REQ_ADDR 50
664	/** The lease time in seconds. */
665	#define RTNET_DHCP_OPT_LEASE_TIME 51
666	/** Option overload.
667	* Indicates that the bp_file and/or bp_sname holds contains DHCP options. */
668	#define RTNET_DHCP_OPT_OPTION_OVERLOAD 52
669	/** Have a 8-bit message type value as data, see RTNET_DHCP_MT_. /
670	#define RTNET_DHCP_OPT_MSG_TYPE 53
671	/** Server ID. */
672	#define RTNET_DHCP_OPT_SERVER_ID 54
673	/** Parameter request list. */
674	#define RTNET_DHCP_OPT_PARAM_REQ_LIST 55
675	/** The maximum DHCP message size a client is willing to accept. */
676	#define RTNET_DHCP_OPT_MAX_DHCP_MSG_SIZE 57
677	/** Client ID. */
678	#define RTNET_DHCP_OPT_CLIENT_ID 61
679	/** TFTP server name. */
680	#define RTNET_DHCP_OPT_TFTP_SERVER_NAME 66
681	/** Bootfile name. */
682	#define RTNET_DHCP_OPT_BOOTFILE_NAME 67
683
684	/** Marks the end of the DHCP options, this has no dhcp_len field. */
685	#define RTNET_DHCP_OPT_END 255
686	/** @} */
687
688	/** @name DHCP Option overload flags (option 52)
689	* @{ */
690	#define RTNET_DHCP_OPTION_OVERLOAD_FILE 1
691	#define RTNET_DHCP_OPTION_OVERLOAD_SNAME 2
692	#define RTNET_DHCP_OPTION_OVERLOAD_MASK 3
693	/** @} */
694
695	/** @name DHCP Message Types (option 53)
696	* @{ */
697	#define RTNET_DHCP_MT_DISCOVER 1
698	#define RTNET_DHCP_MT_OFFER 2
699	#define RTNET_DHCP_MT_REQUEST 3
700	#define RTNET_DHCP_MT_DECLINE 4
701	#define RTNET_DHCP_MT_ACK 5
702	#define RTNET_DHCP_MT_NAC 6
703	#define RTNET_DHCP_MT_RELEASE 7
704	#define RTNET_DHCP_MT_INFORM 8
705	/** @} */
706
707	/** @name DHCP Flags
708	* @{ */
709	#define RTNET_DHCP_FLAG_BROADCAST 0x8000
710	/** @} */
711
712	RTDECL(bool) RTNetIPv4IsDHCPValid(PCRTNETUDP pUdpHdr, PCRTNETBOOTP pDhcp, size_t cbDhcp, uint8_t *pMsgType);
713
714
715	/**
716	* IPv4 DHCP packet.
717	* @deprecated Use RTNETBOOTP.
718	*/
719	#pragma pack(1)
720	typedef struct RTNETDHCP
721	{
722	/** 00 - The packet opcode. */
723	uint8_t Op;
724	/** Hardware address type. */
725	uint8_t HType;
726	/** Hardware address length. */
727	uint8_t HLen;
728	uint8_t Hops;
729	uint32_t XID;
730	uint16_t Secs;
731	uint16_t Flags;
732	/** Client IPv4 address. */
733	RTNETADDRIPV4 CIAddr;
734	/** Your IPv4 address. */
735	RTNETADDRIPV4 YIAddr;
736	/** Server IPv4 address. */
737	RTNETADDRIPV4 SIAddr;
738	/** Gateway IPv4 address. */
739	RTNETADDRIPV4 GIAddr;
740	/** Client hardware address. */
741	uint8_t CHAddr[16];
742	/** Server name. */
743	uint8_t SName[64];
744	uint8_t File[128];
745	uint8_t abMagic[4];
746	uint8_t DhcpOpt;
747	uint8_t DhcpLen; /* 1 */
748	uint8_t DhcpReq;
749	uint8_t abOptions[57];
750	} RTNETDHCP;
751	#pragma pack()
752	/** @todo AssertCompileSize(RTNETDHCP, ); */
753	/** Pointer to a DHCP packet. */
754	typedef RTNETDHCP *PRTNETDHCP;
755	/** Pointer to a const DHCP packet. */
756	typedef RTNETDHCP const *PCRTNETDHCP;
757
758
759	/**
760	* TCP packet.
761	*/
762	#pragma pack(1)
763	typedef struct RTNETTCP
764	{
765	/** 00 - The source port. */
766	uint16_t th_sport;
767	/** 02 - The destination port. */
768	uint16_t th_dport;
769	/** 04 - The sequence number. */
770	uint32_t th_seq;
771	/** 08 - The acknowledgement number. */
772	uint32_t th_ack;
773	#ifdef RT_BIG_ENDIAN
774	unsigned int th_win : 16;
775	unsigned int th_flags : 8;
776	unsigned int th_off : 4;
777	unsigned int th_x2 : 4;
778	#else
779	/** 0c:0 - Reserved. */
780	unsigned int th_x2 : 4;
781	/** 0c:4 - The data offset given as a dword count from the start of this header. */
782	unsigned int th_off : 4;
783	/** 0d - flags. */
784	unsigned int th_flags : 8;
785	/** 0e - The window. */
786	unsigned int th_win : 16;
787	#endif
788	/** 10 - The checksum of the pseudo header, the TCP header and the data. */
789	uint16_t th_sum;
790	/** 12 - The urgent pointer. */
791	uint16_t th_urp;
792	/* (options follows here and then the data (aka text).) */
793	} RTNETTCP;
794	#pragma pack()
795	AssertCompileSize(RTNETTCP, 20);
796	/** Pointer to a TCP packet. */
797	typedef RTNETTCP *PRTNETTCP;
798	/** Pointer to a const TCP packet. */
799	typedef RTNETTCP const *PCRTNETTCP;
800
801	/** The minimum TCP header length (in bytes). (RTNETTCP::th_off * 4) */
802	#define RTNETTCP_MIN_LEN (20)
803
804	/** @name TCP flags (RTNETTCP::th_flags)
805	* @{ */
806	#define RTNETTCP_F_FIN 0x01
807	#define RTNETTCP_F_SYN 0x02
808	#define RTNETTCP_F_RST 0x04
809	#define RTNETTCP_F_PSH 0x08
810	#define RTNETTCP_F_ACK 0x10
811	#define RTNETTCP_F_URG 0x20
812	#define RTNETTCP_F_ECE 0x40
813	#define RTNETTCP_F_CWR 0x80
814	/** @} */
815
816	RTDECL(uint16_t) RTNetTCPChecksum(uint32_t u32Sum, PCRTNETTCP pTcpHdr, void const *pvData, size_t cbData);
817	RTDECL(uint32_t) RTNetIPv4AddTCPChecksum(PCRTNETTCP pTcpHdr, uint32_t u32Sum);
818	RTDECL(uint16_t) RTNetIPv4TCPChecksum(PCRTNETIPV4 pIpHdr, PCRTNETTCP pTcpHdr, void const *pvData);
819	RTDECL(bool) RTNetIPv4IsTCPSizeValid(PCRTNETIPV4 pIpHdr, PCRTNETTCP pTcpHdr, size_t cbHdrMax, size_t cbPktMax);
820	RTDECL(bool) RTNetIPv4IsTCPValid(PCRTNETIPV4 pIpHdr, PCRTNETTCP pTcpHdr, size_t cbHdrMax, void const *pvData,
821	size_t cbPktMax, bool fChecksum);
822
823
824	/**
825	* IPv4 ICMP packet header.
826	*/
827	#pragma pack(1)
828	typedef struct RTNETICMPV4HDR
829	{
830	/** 00 - The ICMP message type. */
831	uint8_t icmp_type;
832	/** 01 - Type specific code that further qualifies the message. */
833	uint8_t icmp_code;
834	/** 02 - Checksum of the ICMP message. */
835	uint16_t icmp_cksum;
836	} RTNETICMPV4HDR;
837	#pragma pack()
838	AssertCompileSize(RTNETICMPV4HDR, 4);
839	/** Pointer to an ICMP packet header. */
840	typedef RTNETICMPV4HDR *PRTNETICMPV4HDR;
841	/** Pointer to a const ICMP packet header. */
842	typedef RTNETICMPV4HDR const *PCRTNETICMPV4HDR;
843
844	/** @name ICMP (v4) message types.
845	* @{ */
846	#define RTNETICMPV4_TYPE_ECHO_REPLY 0
847	#define RTNETICMPV4_TYPE_ECHO_REQUEST 8
848	#define RTNETICMPV4_TYPE_TRACEROUTE 30
849	/** @} */
850
851	/**
852	* IPv4 ICMP ECHO Reply & Request packet.
853	*/
854	#pragma pack(1)
855	typedef struct RTNETICMPV4ECHO
856	{
857	/** 00 - The ICMP header. */
858	RTNETICMPV4HDR Hdr;
859	/** 04 - The identifier to help the requestor match up the reply.
860	* Can be 0. Typically fixed value. */
861	uint16_t icmp_id;
862	/** 06 - The sequence number to help the requestor match up the reply.
863	* Can be 0. Typically incrementing between requests. */
864	uint16_t icmp_seq;
865	/** 08 - Variable length data that is to be returned unmodified in the reply. */
866	uint8_t icmp_data[1];
867	} RTNETICMPV4ECHO;
868	#pragma pack()
869	AssertCompileSize(RTNETICMPV4ECHO, 9);
870	/** Pointer to an ICMP ECHO packet. */
871	typedef RTNETICMPV4ECHO *PRTNETICMPV4ECHO;
872	/** Pointer to a const ICMP ECHO packet. */
873	typedef RTNETICMPV4ECHO const *PCRTNETICMPV4ECHO;
874
875	/**
876	* IPv4 ICMP TRACEROUTE packet.
877	* This is an reply to an IP packet with the traceroute option set.
878	*/
879	#pragma pack(1)
880	typedef struct RTNETICMPV4TRACEROUTE
881	{
882	/** 00 - The ICMP header. */
883	RTNETICMPV4HDR Hdr;
884	/** 04 - Identifier copied from the traceroute option's ID number. */
885	uint16_t icmp_id;
886	/** 06 - Unused. (Possibly an icmp_seq?) */
887	uint16_t icmp_void;
888	/** 08 - Outbound hop count. From the IP packet causing this message. */
889	uint16_t icmp_ohc;
890	/** 0a - Return hop count. From the IP packet causing this message. */
891	uint16_t icmp_rhc;
892	/** 0c - Output link speed, 0 if not known. */
893	uint32_t icmp_speed;
894	/** 10 - Output link MTU, 0 if not known. */
895	uint32_t icmp_mtu;
896	} RTNETICMPV4TRACEROUTE;
897	#pragma pack()
898	AssertCompileSize(RTNETICMPV4TRACEROUTE, 20);
899	/** Pointer to an ICMP TRACEROUTE packet. */
900	typedef RTNETICMPV4TRACEROUTE *PRTNETICMPV4TRACEROUTE;
901	/** Pointer to a const ICMP TRACEROUTE packet. */
902	typedef RTNETICMPV4TRACEROUTE const *PCRTNETICMPV4TRACEROUTE;
903
904	/** @todo add more ICMPv4 as needed. */
905
906	/**
907	* IPv4 ICMP union packet.
908	*/
909	typedef union RTNETICMPV4
910	{
911	RTNETICMPV4HDR Hdr;
912	RTNETICMPV4ECHO Echo;
913	RTNETICMPV4TRACEROUTE Traceroute;
914	} RTNETICMPV4;
915	/** Pointer to an ICMP union packet. */
916	typedef RTNETICMPV4 *PRTNETICMPV4;
917	/** Pointer to a const ICMP union packet. */
918	typedef RTNETICMPV4 const *PCRTNETICMPV4;
919
920
921	/**
922	* IPv6 ICMP packet header.
923	*/
924	#pragma pack(1)
925	typedef struct RTNETICMPV6HDR
926	{
927	/** 00 - The ICMPv6 message type. */
928	uint8_t icmp6_type;
929	/** 01 - Type specific code that further qualifies the message. */
930	uint8_t icmp6_code;
931	/** 02 - Checksum of the ICMPv6 message. */
932	uint16_t icmp6_cksum;
933	} RTNETICMPV6HDR;
934	#pragma pack()
935	AssertCompileSize(RTNETICMPV6HDR, 4);
936	/** Pointer to an ICMPv6 packet header. */
937	typedef RTNETICMPV6HDR *PRTNETICMPV6HDR;
938	/** Pointer to a const ICMP packet header. */
939	typedef RTNETICMPV6HDR const *PCRTNETICMPV6HDR;
940
941	#define RTNETIPV6_PROT_ICMPV6 (58)
942
943	/** @name Internet Control Message Protocol version 6 (ICMPv6) message types.
944	* @{ */
945	#define RTNETIPV6_ICMP_TYPE_RS 133
946	#define RTNETIPV6_ICMP_TYPE_RA 134
947	#define RTNETIPV6_ICMP_TYPE_NS 135
948	#define RTNETIPV6_ICMP_TYPE_NA 136
949	#define RTNETIPV6_ICMP_TYPE_RDR 137
950	/** @} */
951
952	/** @name Neighbor Discovery option types
953	* @{ */
954	#define RTNETIPV6_ICMP_ND_SLLA_OPT (1)
955	#define RTNETIPV6_ICMP_ND_TLLA_OPT (2)
956	/** @} */
957
958	/** ICMPv6 ND Source/Target Link Layer Address option */
959	#pragma pack(1)
960	typedef struct RTNETNDP_LLA_OPT
961	{
962	uint8_t type;
963	uint8_t len;
964	RTMAC lla;
965	} RTNETNDP_LLA_OPT;
966	#pragma pack()
967
968	AssertCompileSize(RTNETNDP_LLA_OPT, 1+1+6);
969
970	typedef RTNETNDP_LLA_OPT *PRTNETNDP_LLA_OPT;
971	typedef RTNETNDP_LLA_OPT const *PCRTNETNDP_LLA_OPT;
972
973	/** ICMPv6 ND Neighbor Sollicitation */
974	#pragma pack(1)
975	typedef struct RTNETNDP
976	{
977	/** 00 - The ICMPv6 header. */
978	RTNETICMPV6HDR Hdr;
979	/** 04 - reserved */
980	uint32_t reserved;
981	/** 08 - target address */
982	RTNETADDRIPV6 target_address;
983	} RTNETNDP;
984	#pragma pack()
985	AssertCompileSize(RTNETNDP, 4+4+16);
986	/** Pointer to a NDP ND packet. */
987	typedef RTNETNDP *PRTNETNDP;
988	/** Pointer to a const NDP NS packet. */
989	typedef RTNETNDP const *PCRTNETNDP;
990
991
992	/**
993	* Ethernet ARP header.
994	*/
995	#pragma pack(1)
996	typedef struct RTNETARPHDR
997	{
998	/** The hardware type. */
999	uint16_t ar_htype;
1000	/** The protocol type (ethertype). */
1001	uint16_t ar_ptype;
1002	/** The hardware address length. */
1003	uint8_t ar_hlen;
1004	/** The protocol address length. */
1005	uint8_t ar_plen;
1006	/** The operation. */
1007	uint16_t ar_oper;
1008	} RTNETARPHDR;
1009	#pragma pack()
1010	AssertCompileSize(RTNETARPHDR, 8);
1011	/** Pointer to an ethernet ARP header. */
1012	typedef RTNETARPHDR *PRTNETARPHDR;
1013	/** Pointer to a const ethernet ARP header. */
1014	typedef RTNETARPHDR const *PCRTNETARPHDR;
1015
1016	/** ARP hardware type - ethernet. */
1017	#define RTNET_ARP_ETHER UINT16_C(1)
1018
1019	/** @name ARP operations
1020	* @{ */
1021	#define RTNET_ARPOP_REQUEST UINT16_C(1) /*< Request hardware address given a protocol address (ARP). /
1022	#define RTNET_ARPOP_REPLY UINT16_C(2)
1023	#define RTNET_ARPOP_REVREQUEST UINT16_C(3) /*< Request protocol address given a hardware address (RARP). /
1024	#define RTNET_ARPOP_REVREPLY UINT16_C(4)
1025	#define RTNET_ARPOP_INVREQUEST UINT16_C(8) /*< Inverse ARP. /
1026	#define RTNET_ARPOP_INVREPLY UINT16_C(9)
1027	/** Check if an ARP operation is a request or not. */
1028	#define RTNET_ARPOP_IS_REQUEST(Op) ((Op) & 1)
1029	/** Check if an ARP operation is a reply or not. */
1030	#define RTNET_ARPOP_IS_REPLY(Op) (!RTNET_ARPOP_IS_REQUEST(Op))
1031	/** @} */
1032
1033
1034	/**
1035	* Ethernet IPv4 + 6-byte MAC ARP request packet.
1036	*/
1037	#pragma pack(1)
1038	typedef struct RTNETARPIPV4
1039	{
1040	/** ARP header. */
1041	RTNETARPHDR Hdr;
1042	/** The sender hardware address. */
1043	RTMAC ar_sha;
1044	/** The sender protocol address. */
1045	RTNETADDRIPV4 ar_spa;
1046	/** The target hardware address. */
1047	RTMAC ar_tha;
1048	/** The target protocol address. */
1049	RTNETADDRIPV4 ar_tpa;
1050	} RTNETARPIPV4;
1051	#pragma pack()
1052	AssertCompileSize(RTNETARPIPV4, 8+6+4+6+4);
1053	/** Pointer to an ethernet IPv4+MAC ARP request packet. */
1054	typedef RTNETARPIPV4 *PRTNETARPIPV4;
1055	/** Pointer to a const ethernet IPv4+MAC ARP request packet. */
1056	typedef RTNETARPIPV4 const *PCRTNETARPIPV4;
1057
1058
1059	/** @} */
1060
1061	RT_C_DECLS_END
1062
1063	#endif /* !IPRT_INCLUDED_net_h */
1064

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