Document the way if_addrhead and struct ifaddr are used.
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.
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c75d8c9028
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=128291
@ -131,6 +131,13 @@ struct ifnet {
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const char *if_dname; /* driver name */
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int if_dunit; /* unit or IF_DUNIT_NONE */
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struct ifaddrhead if_addrhead; /* linked list of addresses per if */
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/*
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* if_addrhead is the list of all addresses associated to
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* an interface. The first element of the list must be
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* of type AF_LINK, and contains sockaddr_dl addresses,
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* which include the link-level address and the name
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* of the interface.
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*/
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struct klist if_klist; /* events attached to this if */
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int if_pcount; /* number of promiscuous listeners */
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struct bpf_if *if_bpf; /* packet filter structure */
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@ -338,6 +345,10 @@ if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
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* of an interface. They are maintained by the different address families,
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* are allocated and attached when an address is set, and are linked
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* together so all addresses for an interface can be located.
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*
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* NOTE: a 'struct ifaddr' is always at the beginning of a larger
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* chunk of malloc'ed memory, where we store the three addresses
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* (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
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*/
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struct ifaddr {
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struct sockaddr *ifa_addr; /* address of interface */
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@ -352,9 +363,6 @@ struct ifaddr {
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u_short ifa_flags; /* mostly rt_flags for cloning */
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u_int ifa_refcnt; /* references to this structure */
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int ifa_metric; /* cost of going out this interface */
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#ifdef notdef
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struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */
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#endif
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int (*ifa_claim_addr) /* check if an addr goes to this if */
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(struct ifaddr *, struct sockaddr *);
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struct mtx ifa_mtx;
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