Commit | Line | Data |
---|---|---|
fcfe450e | 1 | /* in.c 4.4 82/10/09 */ |
8473bbab SL |
2 | |
3 | #include "../h/param.h" | |
4 | #include "../h/mbuf.h" | |
5 | #include "../h/protosw.h" | |
6 | #include "../h/socket.h" | |
7 | #include "../h/socketvar.h" | |
fcfe450e BJ |
8 | #include "../netinet/in.h" |
9 | #include "../netinet/in_systm.h" | |
6187f8f4 SL |
10 | #include "../net/if.h" |
11 | #include "../net/route.h" | |
8473bbab SL |
12 | #include "../net/af.h" |
13 | ||
14 | #ifdef INET | |
15 | inet_hash(sin, hp) | |
16 | register struct sockaddr_in *sin; | |
17 | struct afhash *hp; | |
18 | { | |
8473bbab SL |
19 | hp->afh_nethash = in_netof(sin->sin_addr); |
20 | hp->afh_hosthash = ntohl(sin->sin_addr.s_addr); | |
21 | if (hp->afh_hosthash < 0) | |
22 | hp->afh_hosthash = -hp->afh_hosthash; | |
23 | } | |
24 | ||
25 | inet_netmatch(sin1, sin2) | |
26 | struct sockaddr_in *sin1, *sin2; | |
27 | { | |
8473bbab SL |
28 | return (sin1->sin_addr.s_net == sin2->sin_addr.s_net); |
29 | } | |
30 | ||
31 | /* | |
32 | * Formulate an Internet address from network + host. Used in | |
33 | * building addresses stored in the ifnet structure. | |
34 | */ | |
35 | struct in_addr | |
36 | if_makeaddr(net, host) | |
37 | int net, host; | |
38 | { | |
39 | u_long addr; | |
40 | ||
8473bbab SL |
41 | if (net < 128) |
42 | addr = (net << 24) | host; | |
43 | else if (net < 65536) | |
44 | addr = (net << 16) | host; | |
45 | else | |
46 | addr = (net << 8) | host; | |
47 | #ifdef vax | |
48 | addr = htonl(addr); | |
49 | #endif | |
50 | return (*(struct in_addr *)&addr); | |
51 | } | |
52 | ||
53 | /* | |
54 | * Return the network number from an internet | |
55 | * address; handles class a/b/c network #'s. | |
56 | */ | |
57 | in_netof(in) | |
58 | struct in_addr in; | |
59 | { | |
60 | ||
61 | return (IN_NETOF(in)); | |
62 | } | |
63 | ||
64 | /* | |
65 | * Return the local network address portion of an | |
66 | * internet address; handles class a/b/c network | |
67 | * number formats. | |
68 | */ | |
69 | in_lnaof(in) | |
70 | struct in_addr in; | |
71 | { | |
72 | ||
73 | return (IN_LNAOF(in)); | |
74 | } | |
75 | ||
76 | /* | |
77 | * Initialize an interface's routing | |
78 | * table entry according to the network. | |
79 | * INTERNET SPECIFIC. | |
80 | */ | |
81 | if_rtinit(ifp, flags) | |
82 | register struct ifnet *ifp; | |
83 | int flags; | |
84 | { | |
85 | struct sockaddr_in sin; | |
86 | ||
8473bbab SL |
87 | if (ifp->if_flags & IFF_ROUTE) |
88 | return; | |
89 | bzero((caddr_t)&sin, sizeof (sin)); | |
90 | sin.sin_family = AF_INET; | |
91 | sin.sin_addr = if_makeaddr(ifp->if_net, 0); | |
92 | rtinit(&sin, &ifp->if_addr, flags); | |
93 | } | |
94 | #endif |