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8ae0e4b4 | 1 | /* |
e7a3707f KB |
2 | * Copyright (c) 1982, 1986, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
8ae0e4b4 | 4 | * |
dbf0c423 | 5 | * %sccs.include.redist.c% |
2b6b6284 | 6 | * |
e7a3707f | 7 | * @(#)if_ether.h 8.1 (Berkeley) %G% |
8ae0e4b4 | 8 | */ |
66b2ba82 SL |
9 | |
10 | /* | |
11 | * Structure of a 10Mb/s Ethernet header. | |
12 | */ | |
3fa8d9bb | 13 | struct ether_header { |
12026cce MK |
14 | u_char ether_dhost[6]; |
15 | u_char ether_shost[6]; | |
3fa8d9bb | 16 | u_short ether_type; |
66b2ba82 SL |
17 | }; |
18 | ||
d6fa15c2 KS |
19 | #define ETHERTYPE_PUP 0x0200 /* PUP protocol */ |
20 | #define ETHERTYPE_IP 0x0800 /* IP protocol */ | |
21 | #define ETHERTYPE_ARP 0x0806 /* Addr. resolution protocol */ | |
22 | #define ETHERTYPE_REVARP 0x8035 /* reverse Addr. resolution protocol */ | |
66b2ba82 SL |
23 | |
24 | /* | |
12026cce | 25 | * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have |
8a0ea807 MK |
26 | * (type-ETHERTYPE_TRAIL)*512 bytes of data followed |
27 | * by an ETHER type (as given above) and then the (variable-length) header. | |
66b2ba82 | 28 | */ |
12026cce MK |
29 | #define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */ |
30 | #define ETHERTYPE_NTRAILER 16 | |
3fa8d9bb SL |
31 | |
32 | #define ETHERMTU 1500 | |
33 | #define ETHERMIN (60-14) | |
8ae4cebd | 34 | |
d6fa15c2 KS |
35 | #ifdef KERNEL |
36 | /* | |
37 | * Macro to map an IP multicast address to an Ethernet multicast address. | |
38 | * The high-order 25 bits of the Ethernet address are statically assigned, | |
39 | * and the low-order 23 bits are taken from the low end of the IP address. | |
40 | */ | |
41 | #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \ | |
42 | /* struct in_addr *ipaddr; */ \ | |
43 | /* u_char enaddr[6]; */ \ | |
44 | { \ | |
45 | (enaddr)[0] = 0x01; \ | |
46 | (enaddr)[1] = 0x00; \ | |
47 | (enaddr)[2] = 0x5e; \ | |
48 | (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \ | |
49 | (enaddr)[4] = ((u_char *)ipaddr)[2]; \ | |
50 | (enaddr)[5] = ((u_char *)ipaddr)[3]; \ | |
51 | } | |
52 | #endif | |
53 | ||
8ae4cebd SL |
54 | /* |
55 | * Ethernet Address Resolution Protocol. | |
56 | * | |
57 | * See RFC 826 for protocol description. Structure below is adapted | |
58 | * to resolving internet addresses. Field names used correspond to | |
59 | * RFC 826. | |
60 | */ | |
61 | struct ether_arp { | |
8a0ea807 | 62 | struct arphdr ea_hdr; /* fixed-size header */ |
12026cce MK |
63 | u_char arp_sha[6]; /* sender hardware address */ |
64 | u_char arp_spa[4]; /* sender protocol address */ | |
65 | u_char arp_tha[6]; /* target hardware address */ | |
66 | u_char arp_tpa[4]; /* target protocol address */ | |
8ae4cebd | 67 | }; |
8a0ea807 MK |
68 | #define arp_hrd ea_hdr.ar_hrd |
69 | #define arp_pro ea_hdr.ar_pro | |
70 | #define arp_hln ea_hdr.ar_hln | |
71 | #define arp_pln ea_hdr.ar_pln | |
72 | #define arp_op ea_hdr.ar_op | |
73 | ||
8ae4cebd | 74 | |
8ae4cebd SL |
75 | /* |
76 | * Structure shared between the ethernet driver modules and | |
77 | * the address resolution code. For example, each ec_softc or il_softc | |
78 | * begins with this structure. | |
79 | */ | |
80 | struct arpcom { | |
12026cce MK |
81 | struct ifnet ac_if; /* network-visible interface */ |
82 | u_char ac_enaddr[6]; /* ethernet hardware address */ | |
d6fa15c2 KS |
83 | struct in_addr ac_ipaddr; /* copy of ip address- XXX */ |
84 | struct ether_multi *ac_multiaddrs; /* list of ether multicast addrs */ | |
85 | int ac_multicnt; /* length of ac_multiaddrs list */ | |
187456a2 MK |
86 | }; |
87 | ||
bedad5e8 KS |
88 | struct llinfo_arp { |
89 | struct llinfo_arp *la_next; | |
90 | struct llinfo_arp *la_prev; | |
91 | struct rtentry *la_rt; | |
92 | struct mbuf *la_hold; /* last packet until resolved/timeout */ | |
93 | long la_asked; /* last time we QUERIED for this addr */ | |
94 | #define la_timer la_rt->rt_rmx.rmx_expire /* deletion time in seconds */ | |
95 | }; | |
96 | ||
97 | struct sockaddr_inarp { | |
98 | u_char sin_len; | |
99 | u_char sin_family; | |
100 | u_short sin_port; | |
101 | struct in_addr sin_addr; | |
102 | struct in_addr sin_srcaddr; | |
103 | u_short sin_tos; | |
104 | u_short sin_other; | |
105 | #define SIN_PROXY 1 | |
106 | }; | |
d6fa15c2 KS |
107 | /* |
108 | * IP and ethernet specific routing flags | |
109 | */ | |
110 | #define RTF_USETRAILERS RTF_PROTO1 /* use trailers */ | |
111 | #define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */ | |
bedad5e8 | 112 | |
5ebce7c6 | 113 | #ifdef KERNEL |
0d246a40 | 114 | u_char etherbroadcastaddr[6]; |
d6fa15c2 KS |
115 | u_char ether_ipmulticast_min[6]; |
116 | u_char ether_ipmulticast_max[6]; | |
1acdf733 | 117 | struct ifqueue arpintrq; |
d6fa15c2 | 118 | |
0cf7ef94 | 119 | struct llinfo_arp *arptnew __P((struct in_addr *)); |
bedad5e8 | 120 | struct llinfo_arp llinfo_arp; /* head of the llinfo queue */ |
0cf7ef94 | 121 | |
0cf7ef94 | 122 | void arpwhohas __P((struct arpcom *, struct in_addr *)); |
1acdf733 KB |
123 | void arpintr __P((void)); |
124 | int arpresolve __P((struct arpcom *, | |
125 | struct rtentry *, struct mbuf *, struct sockaddr *, u_char *)); | |
126 | void arp_rtrequest __P((int, struct rtentry *, struct sockaddr *)); | |
127 | void arpwhohas __P((struct arpcom *, struct in_addr *)); | |
128 | ||
129 | int ether_addmulti __P((struct ifreq *, struct arpcom *)); | |
130 | int ether_delmulti __P((struct ifreq *, struct arpcom *)); | |
d6fa15c2 | 131 | |
d6fa15c2 KS |
132 | /* |
133 | * Ethernet multicast address structure. There is one of these for each | |
134 | * multicast address or range of multicast addresses that we are supposed | |
135 | * to listen to on a particular interface. They are kept in a linked list, | |
136 | * rooted in the interface's arpcom structure. (This really has nothing to | |
137 | * do with ARP, or with the Internet address family, but this appears to be | |
138 | * the minimally-disrupting place to put it.) | |
139 | */ | |
140 | struct ether_multi { | |
141 | u_char enm_addrlo[6]; /* low or only address of range */ | |
142 | u_char enm_addrhi[6]; /* high or only address of range */ | |
143 | struct arpcom *enm_ac; /* back pointer to arpcom */ | |
144 | u_int enm_refcount; /* no. claims to this addr/range */ | |
145 | struct ether_multi *enm_next; /* ptr to next ether_multi */ | |
146 | }; | |
147 | ||
d6fa15c2 KS |
148 | /* |
149 | * Structure used by macros below to remember position when stepping through | |
150 | * all of the ether_multi records. | |
151 | */ | |
152 | struct ether_multistep { | |
153 | struct ether_multi *e_enm; | |
154 | }; | |
155 | ||
156 | /* | |
157 | * Macro for looking up the ether_multi record for a given range of Ethernet | |
158 | * multicast addresses connected to a given arpcom structure. If no matching | |
159 | * record is found, "enm" returns NULL. | |
160 | */ | |
161 | #define ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm) \ | |
162 | /* u_char addrlo[6]; */ \ | |
163 | /* u_char addrhi[6]; */ \ | |
164 | /* struct arpcom *ac; */ \ | |
165 | /* struct ether_multi *enm; */ \ | |
166 | { \ | |
167 | for ((enm) = (ac)->ac_multiaddrs; \ | |
168 | (enm) != NULL && \ | |
169 | (bcmp((enm)->enm_addrlo, (addrlo), 6) != 0 || \ | |
170 | bcmp((enm)->enm_addrhi, (addrhi), 6) != 0); \ | |
171 | (enm) = (enm)->enm_next); \ | |
172 | } | |
173 | ||
174 | /* | |
175 | * Macro to step through all of the ether_multi records, one at a time. | |
176 | * The current position is remembered in "step", which the caller must | |
177 | * provide. ETHER_FIRST_MULTI(), below, must be called to initialize "step" | |
178 | * and get the first record. Both macros return a NULL "enm" when there | |
179 | * are no remaining records. | |
180 | */ | |
181 | #define ETHER_NEXT_MULTI(step, enm) \ | |
182 | /* struct ether_multistep step; */ \ | |
183 | /* struct ether_multi *enm; */ \ | |
184 | { \ | |
185 | if (((enm) = (step).e_enm) != NULL) \ | |
186 | (step).e_enm = (enm)->enm_next; \ | |
187 | } | |
188 | ||
189 | #define ETHER_FIRST_MULTI(step, ac, enm) \ | |
190 | /* struct ether_multistep step; */ \ | |
191 | /* struct arpcom *ac; */ \ | |
192 | /* struct ether_multi *enm; */ \ | |
193 | { \ | |
194 | (step).e_enm = (ac)->ac_multiaddrs; \ | |
195 | ETHER_NEXT_MULTI((step), (enm)); \ | |
196 | } | |
1acdf733 | 197 | |
d6fa15c2 | 198 | #endif |