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cb1c44c2 | 1 | /* |
1810611d | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
5b519e94 | 3 | * All rights reserved. |
cb1c44c2 | 4 | * |
5b519e94 | 5 | * Redistribution and use in source and binary forms are permitted |
50c7758a KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
5b519e94 | 16 | * |
b72a6efb | 17 | * @(#)if.h 7.5 (Berkeley) %G% |
cb1c44c2 | 18 | */ |
665ce890 BJ |
19 | |
20 | /* | |
f1b2fa5b BJ |
21 | * Structures defining a network interface, providing a packet |
22 | * transport mechanism (ala level 0 of the PUP protocols). | |
23 | * | |
24 | * Each interface accepts output datagrams of a specified maximum | |
25 | * length, and provides higher level routines with input datagrams | |
26 | * received from its medium. | |
27 | * | |
28 | * Output occurs when the routine if_output is called, with three parameters: | |
ee787340 SL |
29 | * (*ifp->if_output)(ifp, m, dst) |
30 | * Here m is the mbuf chain to be sent and dst is the destination address. | |
31 | * The output routine encapsulates the supplied datagram if necessary, | |
32 | * and then transmits it on its medium. | |
f1b2fa5b BJ |
33 | * |
34 | * On input, each interface unwraps the data received by it, and either | |
35 | * places it on the input queue of a internetwork datagram routine | |
36 | * and posts the associated software interrupt, or passes the datagram to a raw | |
37 | * packet input routine. | |
38 | * | |
ee787340 | 39 | * Routines exist for locating interfaces by their addresses |
f1b2fa5b BJ |
40 | * or for locating a interface on a certain network, as well as more general |
41 | * routing and gateway routines maintaining information used to locate | |
ee787340 | 42 | * interfaces. These routines live in the files if.c and route.c |
8a13b737 | 43 | */ |
8a13b737 BJ |
44 | |
45 | /* | |
46 | * Structure defining a queue for a network interface. | |
665ce890 BJ |
47 | * |
48 | * (Would like to call this struct ``if'', but C isn't PL/1.) | |
49 | */ | |
50 | struct ifnet { | |
b454c3ea | 51 | char *if_name; /* name, e.g. ``en'' or ``lo'' */ |
665ce890 | 52 | short if_unit; /* sub-unit for lower level driver */ |
665ce890 | 53 | short if_mtu; /* maximum transmission unit */ |
ee787340 | 54 | short if_flags; /* up/down, broadcast, etc. */ |
de602274 | 55 | short if_timer; /* time 'til if_watchdog called */ |
484ee22e | 56 | int if_metric; /* routing metric (external only) */ |
63de846e | 57 | struct ifaddr *if_addrlist; /* linked list of addresses per if */ |
f1b2fa5b BJ |
58 | struct ifqueue { |
59 | struct mbuf *ifq_head; | |
60 | struct mbuf *ifq_tail; | |
1e977657 BJ |
61 | int ifq_len; |
62 | int ifq_maxlen; | |
63 | int ifq_drops; | |
f1b2fa5b BJ |
64 | } if_snd; /* output queue */ |
65 | /* procedure handles */ | |
66 | int (*if_init)(); /* init routine */ | |
38a81509 MK |
67 | int (*if_output)(); /* output routine (enqueue) */ |
68 | int (*if_start)(); /* initiate output routine */ | |
69 | int (*if_done)(); /* output complete routine */ | |
a62dd253 | 70 | int (*if_ioctl)(); /* ioctl routine */ |
b3691eab | 71 | int (*if_reset)(); /* bus reset routine */ |
de602274 | 72 | int (*if_watchdog)(); /* timer routine */ |
f1b2fa5b | 73 | /* generic interface statistics */ |
b454c3ea BJ |
74 | int if_ipackets; /* packets received on interface */ |
75 | int if_ierrors; /* input errors on interface */ | |
76 | int if_opackets; /* packets sent on interface */ | |
77 | int if_oerrors; /* output errors on interface */ | |
f1b2fa5b | 78 | int if_collisions; /* collisions on csma interfaces */ |
f1b2fa5b | 79 | /* end statistics */ |
4ad99bae | 80 | struct ifnet *if_next; |
b72a6efb KS |
81 | u_char if_type; /* ethernet, tokenring, etc */ |
82 | u_char if_addrlen; /* media address length */ | |
83 | u_char if_hdrlen; /* media header length */ | |
665ce890 BJ |
84 | }; |
85 | ||
ee787340 SL |
86 | #define IFF_UP 0x1 /* interface is up */ |
87 | #define IFF_BROADCAST 0x2 /* broadcast address valid */ | |
88 | #define IFF_DEBUG 0x4 /* turn on debugging */ | |
484ee22e | 89 | #define IFF_LOOPBACK 0x8 /* is a loopback net */ |
dc39362e | 90 | #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */ |
a62dd253 | 91 | #define IFF_NOTRAILERS 0x20 /* avoid use of trailers */ |
81889e84 | 92 | #define IFF_RUNNING 0x40 /* resources allocated */ |
2effa891 | 93 | #define IFF_NOARP 0x80 /* no address resolution protocol */ |
bbe75d63 MK |
94 | /* next two not supported now, but reserved: */ |
95 | #define IFF_PROMISC 0x100 /* receive all packets */ | |
96 | #define IFF_ALLMULTI 0x200 /* receive all multicast packets */ | |
38a81509 MK |
97 | #define IFF_OACTIVE 0x400 /* transmission in progress */ |
98 | #define IFF_SIMPLEX 0x800 /* can't hear own transmissions */ | |
99 | ||
484ee22e | 100 | /* flags set internally only: */ |
38a81509 | 101 | #define IFF_CANTCHANGE (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE) |
ee787340 | 102 | |
f1b2fa5b BJ |
103 | /* |
104 | * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) | |
105 | * input routines have queues of messages stored on ifqueue structures | |
106 | * (defined above). Entries are added to and deleted from these structures | |
107 | * by these macros, which should be called with ipl raised to splimp(). | |
108 | */ | |
1e977657 BJ |
109 | #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) |
110 | #define IF_DROP(ifq) ((ifq)->ifq_drops++) | |
8a13b737 BJ |
111 | #define IF_ENQUEUE(ifq, m) { \ |
112 | (m)->m_act = 0; \ | |
113 | if ((ifq)->ifq_tail == 0) \ | |
405c9168 | 114 | (ifq)->ifq_head = m; \ |
8a13b737 BJ |
115 | else \ |
116 | (ifq)->ifq_tail->m_act = m; \ | |
405c9168 | 117 | (ifq)->ifq_tail = m; \ |
1e977657 | 118 | (ifq)->ifq_len++; \ |
8a13b737 | 119 | } |
e740a894 BJ |
120 | #define IF_PREPEND(ifq, m) { \ |
121 | (m)->m_act = (ifq)->ifq_head; \ | |
1dd55890 BJ |
122 | if ((ifq)->ifq_tail == 0) \ |
123 | (ifq)->ifq_tail = (m); \ | |
e740a894 | 124 | (ifq)->ifq_head = (m); \ |
1e977657 | 125 | (ifq)->ifq_len++; \ |
e740a894 | 126 | } |
8a13b737 BJ |
127 | #define IF_DEQUEUE(ifq, m) { \ |
128 | (m) = (ifq)->ifq_head; \ | |
129 | if (m) { \ | |
130 | if (((ifq)->ifq_head = (m)->m_act) == 0) \ | |
131 | (ifq)->ifq_tail = 0; \ | |
132 | (m)->m_act = 0; \ | |
1e977657 | 133 | (ifq)->ifq_len--; \ |
8a13b737 BJ |
134 | } \ |
135 | } | |
665ce890 | 136 | |
1e977657 | 137 | #define IFQ_MAXLEN 50 |
de602274 | 138 | #define IFNET_SLOWHZ 1 /* granularity is 1 second */ |
1e977657 | 139 | |
63de846e MK |
140 | /* |
141 | * The ifaddr structure contains information about one address | |
142 | * of an interface. They are maintained by the different address families, | |
143 | * are allocated and attached when an address is set, and are linked | |
144 | * together so all addresses for an interface can be located. | |
145 | */ | |
146 | struct ifaddr { | |
b72a6efb KS |
147 | struct sockaddr *ifa_addr; /* address of interface */ |
148 | struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ | |
149 | #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ | |
150 | struct sockaddr *ifa_netmask; /* used to determine subnet */ | |
63de846e MK |
151 | struct ifnet *ifa_ifp; /* back-pointer to interface */ |
152 | struct ifaddr *ifa_next; /* next address for interface */ | |
153 | }; | |
0c33c832 | 154 | /* |
a62dd253 SL |
155 | * Interface request structure used for socket |
156 | * ioctl's. All interface ioctl's must have parameter | |
157 | * definitions which begin with ifr_name. The | |
158 | * remainder may be interface specific. | |
0c33c832 SL |
159 | */ |
160 | struct ifreq { | |
a62dd253 SL |
161 | #define IFNAMSIZ 16 |
162 | char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ | |
0c33c832 SL |
163 | union { |
164 | struct sockaddr ifru_addr; | |
165 | struct sockaddr ifru_dstaddr; | |
bdef13f6 | 166 | struct sockaddr ifru_broadaddr; |
0c33c832 | 167 | short ifru_flags; |
484ee22e | 168 | int ifru_metric; |
a62dd253 | 169 | caddr_t ifru_data; |
0c33c832 SL |
170 | } ifr_ifru; |
171 | #define ifr_addr ifr_ifru.ifru_addr /* address */ | |
172 | #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ | |
bdef13f6 | 173 | #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ |
0c33c832 | 174 | #define ifr_flags ifr_ifru.ifru_flags /* flags */ |
484ee22e | 175 | #define ifr_metric ifr_ifru.ifru_metric /* metric */ |
a62dd253 | 176 | #define ifr_data ifr_ifru.ifru_data /* for use by interface */ |
0c33c832 SL |
177 | }; |
178 | ||
b72a6efb KS |
179 | struct ifaliasreq { |
180 | char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ | |
181 | struct sockaddr ifra_addr; | |
182 | struct sockaddr ifra_broadaddr; | |
183 | struct sockaddr ifra_mask; | |
184 | }; | |
185 | ||
0c33c832 SL |
186 | /* |
187 | * Structure used in SIOCGIFCONF request. | |
188 | * Used to retrieve interface configuration | |
189 | * for machine (useful for programs which | |
190 | * must know all networks accessible). | |
191 | */ | |
192 | struct ifconf { | |
193 | int ifc_len; /* size of associated buffer */ | |
194 | union { | |
195 | caddr_t ifcu_buf; | |
196 | struct ifreq *ifcu_req; | |
197 | } ifc_ifcu; | |
198 | #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ | |
199 | #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ | |
200 | }; | |
201 | ||
665ce890 | 202 | #ifdef KERNEL |
d66f7a18 | 203 | #include "../net/if_arp.h" |
ee787340 | 204 | struct ifqueue rawintrq; /* raw packet input queue */ |
665ce890 | 205 | struct ifnet *ifnet; |
2612fc91 | 206 | struct ifaddr *ifa_ifwithaddr(), *ifa_ifwithnet(); |
87e42a46 | 207 | struct ifaddr *ifa_ifwithdstaddr(); |
d66f7a18 MK |
208 | #else KERNEL |
209 | #include <net/if_arp.h> | |
210 | #endif KERNEL |