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Document the way if_addrhead and struct ifaddr are used.

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Remove a member from 'struct ifaddr' which has been in an
#ifdef notdef block since rev 1.1

No ABI changes -- no need to recompile anything.
This commit is contained in:
Luigi Rizzo 2004-04-15 19:45:59 +00:00
parent c75d8c9028
commit 621b79c4d5
1 changed files with 11 additions and 3 deletions
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14
sys/net/if_var.h
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@ -131,6 +131,13 @@ struct ifnet {
const char *if_dname; /* driver name */
int if_dunit; /* unit or IF_DUNIT_NONE */
struct ifaddrhead if_addrhead; /* linked list of addresses per if */
/*
* if_addrhead is the list of all addresses associated to
* an interface. The first element of the list must be
* of type AF_LINK, and contains sockaddr_dl addresses,
* which include the link-level address and the name
* of the interface.
*/
struct klist if_klist; /* events attached to this if */
int if_pcount; /* number of promiscuous listeners */
struct bpf_if *if_bpf; /* packet filter structure */
@ -338,6 +345,10 @@ if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
* of an interface. They are maintained by the different address families,
* are allocated and attached when an address is set, and are linked
* together so all addresses for an interface can be located.
*
* NOTE: a 'struct ifaddr' is always at the beginning of a larger
* chunk of malloc'ed memory, where we store the three addresses
* (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
*/
struct ifaddr {
struct sockaddr *ifa_addr; /* address of interface */
@ -352,9 +363,6 @@ struct ifaddr {
u_short ifa_flags; /* mostly rt_flags for cloning */
u_int ifa_refcnt; /* references to this structure */
int ifa_metric; /* cost of going out this interface */
#ifdef notdef
struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */
#endif
int (*ifa_claim_addr) /* check if an addr goes to this if */
(struct ifaddr *, struct sockaddr *);
struct mtx ifa_mtx;