projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| ac76a23d | 1 | /* in.c 4.8 82/10/20 */ |
| 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 | { | |
| a8d3bf7f | 19 | |
| 8473bbab | 20 | hp->afh_nethash = in_netof(sin->sin_addr); |
| 6e7edb25 BJ |
21 | hp->afh_hosthash = sin->sin_addr.s_addr; |
| 22 | #if vax || pdp11 || ns16032 | |
| 23 | hp->afh_hosthash = ntohl((u_long)hp->afh_hosthash); | |
| 24 | #else | |
| 8473bbab SL |
25 | } |
| 26 | ||
| 27 | inet_netmatch(sin1, sin2) | |
| 28 | struct sockaddr_in *sin1, *sin2; | |
| 29 | { | |
| a8d3bf7f | 30 | |
| 8473bbab SL |
31 | return (sin1->sin_addr.s_net == sin2->sin_addr.s_net); |
| 32 | } | |
| 33 | ||
| 34 | /* | |
| 35 | * Formulate an Internet address from network + host. Used in | |
| 36 | * building addresses stored in the ifnet structure. | |
| 37 | */ | |
| 38 | struct in_addr | |
| 39 | if_makeaddr(net, host) | |
| 40 | int net, host; | |
| 41 | { | |
| 42 | u_long addr; | |
| 43 | ||
| 8473bbab | 44 | if (net < 128) |
| 6e7edb25 | 45 | addr = (net << IN_CLASSA_NSHIFT) | host; |
| 8473bbab | 46 | else if (net < 65536) |
| 6e7edb25 | 47 | addr = (net << IN_CLASSB_NSHIFT) | host; |
| 8473bbab | 48 | else |
| 6e7edb25 | 49 | addr = (net << IN_CLASSC_NSHIFT) | host; |
| a8d3bf7f | 50 | #ifdef vax || pdp11 || ns16032 |
| 8473bbab SL |
51 | addr = htonl(addr); |
| 52 | #endif | |
| 53 | return (*(struct in_addr *)&addr); | |
| 54 | } | |
| 55 | ||
| 56 | /* | |
| a8d3bf7f | 57 | * Return the network number from an internet address. |
| 8473bbab SL |
58 | */ |
| 59 | in_netof(in) | |
| 60 | struct in_addr in; | |
| 61 | { | |
| 6e7edb25 | 62 | register u_long i = in.s_addr; |
| 8473bbab | 63 | |
| a8d3bf7f BJ |
64 | #ifdef vax || pdp11 || ns16032 |
| 65 | i = ntohl(i); | |
| 66 | #endif | |
| 67 | if (IN_CLASSA(i)) | |
| 6e7edb25 | 68 | return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT); |
| a8d3bf7f | 69 | else if (IN_CLASSB(i)) |
| 6e7edb25 | 70 | return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT); |
| a8d3bf7f | 71 | else |
| 6e7edb25 | 72 | return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT); |
| 8473bbab SL |
73 | } |
| 74 | ||
| ac76a23d | 75 | #ifndef notdef |
| 8473bbab | 76 | /* |
| a8d3bf7f | 77 | * Return the host portion of an internet address. |
| 8473bbab SL |
78 | */ |
| 79 | in_lnaof(in) | |
| 80 | struct in_addr in; | |
| 81 | { | |
| 6e7edb25 | 82 | register u_long i = in.s_addr; |
| 8473bbab | 83 | |
| a8d3bf7f BJ |
84 | #ifdef vax || pdp11 || ns16032 |
| 85 | i = ntohl(i); | |
| 86 | #endif | |
| 87 | if (IN_CLASSA(i)) | |
| 6e7edb25 | 88 | return ((i)&IN_CLASSA_HOST); |
| a8d3bf7f | 89 | else if (IN_CLASSB(i)) |
| 6e7edb25 | 90 | return ((i)&IN_CLASSB_HOST); |
| a8d3bf7f | 91 | else |
| 6e7edb25 | 92 | return ((i)&IN_CLASSC_HOST); |
| 8473bbab | 93 | } |
| ac76a23d | 94 | #endif |
| 8473bbab SL |
95 | |
| 96 | /* | |
| 97 | * Initialize an interface's routing | |
| 98 | * table entry according to the network. | |
| 99 | * INTERNET SPECIFIC. | |
| 100 | */ | |
| 101 | if_rtinit(ifp, flags) | |
| 102 | register struct ifnet *ifp; | |
| 103 | int flags; | |
| 104 | { | |
| 105 | struct sockaddr_in sin; | |
| 106 | ||
| 8473bbab SL |
107 | if (ifp->if_flags & IFF_ROUTE) |
| 108 | return; | |
| 109 | bzero((caddr_t)&sin, sizeof (sin)); | |
| 110 | sin.sin_family = AF_INET; | |
| 111 | sin.sin_addr = if_makeaddr(ifp->if_net, 0); | |
| a1edc12b | 112 | rtinit((struct sockaddr *)&sin, &ifp->if_addr, flags); |
| 8473bbab SL |
113 | } |
| 114 | #endif |