Commit | Line | Data |
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cb1c44c2 | 1 | /* |
ba56c73e | 2 | * Copyright (c) 1982, 1986, 1989 Regents of the University of California. |
5b519e94 | 3 | * All rights reserved. |
cb1c44c2 | 4 | * |
dbf0c423 | 5 | * %sccs.include.redist.c% |
5b519e94 | 6 | * |
3d424137 | 7 | * @(#)if.h 7.10 (Berkeley) %G% |
cb1c44c2 | 8 | */ |
665ce890 BJ |
9 | |
10 | /* | |
f1b2fa5b BJ |
11 | * Structures defining a network interface, providing a packet |
12 | * transport mechanism (ala level 0 of the PUP protocols). | |
13 | * | |
14 | * Each interface accepts output datagrams of a specified maximum | |
15 | * length, and provides higher level routines with input datagrams | |
16 | * received from its medium. | |
17 | * | |
18 | * Output occurs when the routine if_output is called, with three parameters: | |
ee787340 SL |
19 | * (*ifp->if_output)(ifp, m, dst) |
20 | * Here m is the mbuf chain to be sent and dst is the destination address. | |
21 | * The output routine encapsulates the supplied datagram if necessary, | |
22 | * and then transmits it on its medium. | |
f1b2fa5b BJ |
23 | * |
24 | * On input, each interface unwraps the data received by it, and either | |
25 | * places it on the input queue of a internetwork datagram routine | |
26 | * and posts the associated software interrupt, or passes the datagram to a raw | |
27 | * packet input routine. | |
28 | * | |
ee787340 | 29 | * Routines exist for locating interfaces by their addresses |
f1b2fa5b BJ |
30 | * or for locating a interface on a certain network, as well as more general |
31 | * routing and gateway routines maintaining information used to locate | |
ee787340 | 32 | * interfaces. These routines live in the files if.c and route.c |
8a13b737 | 33 | */ |
ba56c73e KS |
34 | #ifndef _TIME_ /* XXX fast fix for SNMP, going away soon */ |
35 | #ifdef KERNEL | |
36 | #include "../sys/time.h" | |
37 | #else | |
38 | #include <sys/time.h> | |
39 | #endif | |
40 | #endif | |
8a13b737 BJ |
41 | |
42 | /* | |
43 | * Structure defining a queue for a network interface. | |
665ce890 BJ |
44 | * |
45 | * (Would like to call this struct ``if'', but C isn't PL/1.) | |
46 | */ | |
ba56c73e | 47 | |
665ce890 | 48 | struct ifnet { |
b454c3ea | 49 | char *if_name; /* name, e.g. ``en'' or ``lo'' */ |
665ce890 | 50 | short if_unit; /* sub-unit for lower level driver */ |
665ce890 | 51 | short if_mtu; /* maximum transmission unit */ |
ee787340 | 52 | short if_flags; /* up/down, broadcast, etc. */ |
de602274 | 53 | short if_timer; /* time 'til if_watchdog called */ |
484ee22e | 54 | int if_metric; /* routing metric (external only) */ |
63de846e | 55 | struct ifaddr *if_addrlist; /* linked list of addresses per if */ |
f1b2fa5b BJ |
56 | struct ifqueue { |
57 | struct mbuf *ifq_head; | |
58 | struct mbuf *ifq_tail; | |
1e977657 BJ |
59 | int ifq_len; |
60 | int ifq_maxlen; | |
61 | int ifq_drops; | |
f1b2fa5b BJ |
62 | } if_snd; /* output queue */ |
63 | /* procedure handles */ | |
64 | int (*if_init)(); /* init routine */ | |
38a81509 MK |
65 | int (*if_output)(); /* output routine (enqueue) */ |
66 | int (*if_start)(); /* initiate output routine */ | |
67 | int (*if_done)(); /* output complete routine */ | |
a62dd253 | 68 | int (*if_ioctl)(); /* ioctl routine */ |
b3691eab | 69 | int (*if_reset)(); /* bus reset routine */ |
de602274 | 70 | int (*if_watchdog)(); /* timer routine */ |
f1b2fa5b | 71 | /* generic interface statistics */ |
b454c3ea BJ |
72 | int if_ipackets; /* packets received on interface */ |
73 | int if_ierrors; /* input errors on interface */ | |
74 | int if_opackets; /* packets sent on interface */ | |
75 | int if_oerrors; /* output errors on interface */ | |
f1b2fa5b | 76 | int if_collisions; /* collisions on csma interfaces */ |
f1b2fa5b | 77 | /* end statistics */ |
4ad99bae | 78 | struct ifnet *if_next; |
b72a6efb KS |
79 | u_char if_type; /* ethernet, tokenring, etc */ |
80 | u_char if_addrlen; /* media address length */ | |
81 | u_char if_hdrlen; /* media header length */ | |
8b2d214b | 82 | u_char if_index; /* numeric abbreviation for this if */ |
ba56c73e KS |
83 | /* more statistics here to avoid recompiling netstat */ |
84 | struct timeval if_lastchange; /* last updated */ | |
85 | int if_ibytes; /* total number of octets received */ | |
86 | int if_obytes; /* total number of octets sent */ | |
87 | int if_imcasts; /* packets received via multicast */ | |
88 | int if_omcasts; /* packets sent via multicast */ | |
89 | int if_iqdrops; /* dropped on input, this interface */ | |
90 | int if_noproto; /* destined for unsupported protocol */ | |
91 | int if_baudrate; /* linespeed */ | |
665ce890 BJ |
92 | }; |
93 | ||
ee787340 SL |
94 | #define IFF_UP 0x1 /* interface is up */ |
95 | #define IFF_BROADCAST 0x2 /* broadcast address valid */ | |
96 | #define IFF_DEBUG 0x4 /* turn on debugging */ | |
484ee22e | 97 | #define IFF_LOOPBACK 0x8 /* is a loopback net */ |
dc39362e | 98 | #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */ |
a62dd253 | 99 | #define IFF_NOTRAILERS 0x20 /* avoid use of trailers */ |
81889e84 | 100 | #define IFF_RUNNING 0x40 /* resources allocated */ |
2effa891 | 101 | #define IFF_NOARP 0x80 /* no address resolution protocol */ |
bbe75d63 MK |
102 | /* next two not supported now, but reserved: */ |
103 | #define IFF_PROMISC 0x100 /* receive all packets */ | |
104 | #define IFF_ALLMULTI 0x200 /* receive all multicast packets */ | |
38a81509 MK |
105 | #define IFF_OACTIVE 0x400 /* transmission in progress */ |
106 | #define IFF_SIMPLEX 0x800 /* can't hear own transmissions */ | |
107 | ||
484ee22e | 108 | /* flags set internally only: */ |
3d424137 MK |
109 | #define IFF_CANTCHANGE \ |
110 | (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|IFF_SIMPLEX) | |
ee787340 | 111 | |
f1b2fa5b BJ |
112 | /* |
113 | * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) | |
114 | * input routines have queues of messages stored on ifqueue structures | |
115 | * (defined above). Entries are added to and deleted from these structures | |
116 | * by these macros, which should be called with ipl raised to splimp(). | |
117 | */ | |
1e977657 BJ |
118 | #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) |
119 | #define IF_DROP(ifq) ((ifq)->ifq_drops++) | |
8a13b737 | 120 | #define IF_ENQUEUE(ifq, m) { \ |
0428a0b2 | 121 | (m)->m_nextpkt = 0; \ |
8a13b737 | 122 | if ((ifq)->ifq_tail == 0) \ |
405c9168 | 123 | (ifq)->ifq_head = m; \ |
8a13b737 | 124 | else \ |
0428a0b2 | 125 | (ifq)->ifq_tail->m_nextpkt = m; \ |
405c9168 | 126 | (ifq)->ifq_tail = m; \ |
1e977657 | 127 | (ifq)->ifq_len++; \ |
8a13b737 | 128 | } |
e740a894 | 129 | #define IF_PREPEND(ifq, m) { \ |
0428a0b2 | 130 | (m)->m_nextpkt = (ifq)->ifq_head; \ |
1dd55890 BJ |
131 | if ((ifq)->ifq_tail == 0) \ |
132 | (ifq)->ifq_tail = (m); \ | |
e740a894 | 133 | (ifq)->ifq_head = (m); \ |
1e977657 | 134 | (ifq)->ifq_len++; \ |
e740a894 | 135 | } |
8a13b737 BJ |
136 | #define IF_DEQUEUE(ifq, m) { \ |
137 | (m) = (ifq)->ifq_head; \ | |
138 | if (m) { \ | |
0428a0b2 | 139 | if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ |
8a13b737 | 140 | (ifq)->ifq_tail = 0; \ |
0428a0b2 | 141 | (m)->m_nextpkt = 0; \ |
1e977657 | 142 | (ifq)->ifq_len--; \ |
8a13b737 BJ |
143 | } \ |
144 | } | |
665ce890 | 145 | |
1e977657 | 146 | #define IFQ_MAXLEN 50 |
de602274 | 147 | #define IFNET_SLOWHZ 1 /* granularity is 1 second */ |
1e977657 | 148 | |
63de846e MK |
149 | /* |
150 | * The ifaddr structure contains information about one address | |
151 | * of an interface. They are maintained by the different address families, | |
152 | * are allocated and attached when an address is set, and are linked | |
153 | * together so all addresses for an interface can be located. | |
154 | */ | |
155 | struct ifaddr { | |
b72a6efb KS |
156 | struct sockaddr *ifa_addr; /* address of interface */ |
157 | struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ | |
158 | #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ | |
159 | struct sockaddr *ifa_netmask; /* used to determine subnet */ | |
63de846e MK |
160 | struct ifnet *ifa_ifp; /* back-pointer to interface */ |
161 | struct ifaddr *ifa_next; /* next address for interface */ | |
8b2d214b KS |
162 | int (*ifa_rtrequest)(); /* check or clean routes (+ or -)'d */ |
163 | struct rtentry *ifa_rt; /* ??? for ROUTETOIF */ | |
164 | u_short ifa_flags; /* mostly rt_flags for cloning */ | |
165 | u_short ifa_llinfolen; /* extra to malloc for link info */ | |
63de846e | 166 | }; |
8b2d214b | 167 | #define IFA_ROUTE RTF_UP /* route installed */ |
0c33c832 | 168 | /* |
a62dd253 SL |
169 | * Interface request structure used for socket |
170 | * ioctl's. All interface ioctl's must have parameter | |
171 | * definitions which begin with ifr_name. The | |
172 | * remainder may be interface specific. | |
0c33c832 SL |
173 | */ |
174 | struct ifreq { | |
a62dd253 SL |
175 | #define IFNAMSIZ 16 |
176 | char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ | |
0c33c832 SL |
177 | union { |
178 | struct sockaddr ifru_addr; | |
179 | struct sockaddr ifru_dstaddr; | |
bdef13f6 | 180 | struct sockaddr ifru_broadaddr; |
0c33c832 | 181 | short ifru_flags; |
484ee22e | 182 | int ifru_metric; |
a62dd253 | 183 | caddr_t ifru_data; |
0c33c832 SL |
184 | } ifr_ifru; |
185 | #define ifr_addr ifr_ifru.ifru_addr /* address */ | |
186 | #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ | |
bdef13f6 | 187 | #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ |
0c33c832 | 188 | #define ifr_flags ifr_ifru.ifru_flags /* flags */ |
484ee22e | 189 | #define ifr_metric ifr_ifru.ifru_metric /* metric */ |
a62dd253 | 190 | #define ifr_data ifr_ifru.ifru_data /* for use by interface */ |
0c33c832 SL |
191 | }; |
192 | ||
b72a6efb KS |
193 | struct ifaliasreq { |
194 | char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ | |
195 | struct sockaddr ifra_addr; | |
196 | struct sockaddr ifra_broadaddr; | |
197 | struct sockaddr ifra_mask; | |
198 | }; | |
199 | ||
0c33c832 SL |
200 | /* |
201 | * Structure used in SIOCGIFCONF request. | |
202 | * Used to retrieve interface configuration | |
203 | * for machine (useful for programs which | |
204 | * must know all networks accessible). | |
205 | */ | |
206 | struct ifconf { | |
207 | int ifc_len; /* size of associated buffer */ | |
208 | union { | |
209 | caddr_t ifcu_buf; | |
210 | struct ifreq *ifcu_req; | |
211 | } ifc_ifcu; | |
212 | #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ | |
213 | #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ | |
214 | }; | |
215 | ||
665ce890 | 216 | #ifdef KERNEL |
d66f7a18 | 217 | #include "../net/if_arp.h" |
ee787340 | 218 | struct ifqueue rawintrq; /* raw packet input queue */ |
665ce890 | 219 | struct ifnet *ifnet; |
2612fc91 | 220 | struct ifaddr *ifa_ifwithaddr(), *ifa_ifwithnet(); |
87e42a46 | 221 | struct ifaddr *ifa_ifwithdstaddr(); |
d66f7a18 MK |
222 | #else KERNEL |
223 | #include <net/if_arp.h> | |
224 | #endif KERNEL |