| 1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)af.c 4.3 %G%"; |
| 3 | #endif |
| 4 | |
| 5 | #include <sys/types.h> |
| 6 | #include <sys/socket.h> |
| 7 | #include <net/in.h> |
| 8 | |
| 9 | #include "router.h" |
| 10 | #include "rip.h" |
| 11 | |
| 12 | /* |
| 13 | * Address family support routines |
| 14 | */ |
| 15 | int null_hash(), null_netmatch(), null_output(), |
| 16 | null_portmatch(), null_portcheck(), |
| 17 | null_checkhost(), null_canon(); |
| 18 | int inet_hash(), inet_netmatch(), inet_output(), |
| 19 | inet_portmatch(), inet_portcheck(), |
| 20 | inet_checkhost(), inet_canon(); |
| 21 | #define NIL \ |
| 22 | { null_hash, null_netmatch, null_output, \ |
| 23 | null_portmatch, null_portcheck, null_checkhost, \ |
| 24 | null_canon } |
| 25 | #define INET \ |
| 26 | { inet_hash, inet_netmatch, inet_output, \ |
| 27 | inet_portmatch, inet_portcheck, inet_checkhost, \ |
| 28 | inet_canon } |
| 29 | |
| 30 | struct afswitch afswitch[AF_MAX] = |
| 31 | { NIL, NIL, INET, INET, NIL, NIL, NIL, NIL, NIL, NIL, NIL }; |
| 32 | |
| 33 | inet_hash(sin, hp) |
| 34 | register struct sockaddr_in *sin; |
| 35 | struct afhash *hp; |
| 36 | { |
| 37 | |
| 38 | hp->afh_nethash = sin->sin_addr.s_net; |
| 39 | hp->afh_hosthash = sin->sin_addr.s_addr; |
| 40 | #if vax || pdp11 |
| 41 | hp->afh_hosthash = ntohl(hp->afh_hosthash); |
| 42 | #endif |
| 43 | hp->afh_hosthash &= 0x7fffffff; |
| 44 | } |
| 45 | |
| 46 | inet_netmatch(sin1, sin2) |
| 47 | struct sockaddr_in *sin1, *sin2; |
| 48 | { |
| 49 | |
| 50 | return (sin1->sin_addr.s_net == sin2->sin_addr.s_net); |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * Verify the message is from the right port. |
| 55 | */ |
| 56 | inet_portmatch(sin) |
| 57 | struct sockaddr_in *sin; |
| 58 | { |
| 59 | int port = sin->sin_port; |
| 60 | |
| 61 | #if vax || pdp11 |
| 62 | port = ntohs(port); |
| 63 | #endif |
| 64 | return (port == IPPORT_ROUTESERVER); |
| 65 | } |
| 66 | |
| 67 | /* |
| 68 | * Verify the message is from a "trusted" port. |
| 69 | */ |
| 70 | inet_portcheck(sin) |
| 71 | struct sockaddr_in *sin; |
| 72 | { |
| 73 | int port = sin->sin_port; |
| 74 | |
| 75 | #if vax || pdp11 |
| 76 | port = ntohs(port); |
| 77 | #endif |
| 78 | return (port <= IPPORT_RESERVED); |
| 79 | } |
| 80 | |
| 81 | /* |
| 82 | * Internet output routine. |
| 83 | */ |
| 84 | inet_output(s, sin, size) |
| 85 | int s; |
| 86 | struct sockaddr_in *sin; |
| 87 | int size; |
| 88 | { |
| 89 | extern char packet[MAXPACKETSIZE]; |
| 90 | struct sockaddr_in dst; |
| 91 | |
| 92 | dst = *sin; |
| 93 | sin = &dst; |
| 94 | if (sin->sin_port == 0) { |
| 95 | sin->sin_port = IPPORT_ROUTESERVER; |
| 96 | #if vax || pdp11 |
| 97 | sin->sin_port = htons(sin->sin_port); |
| 98 | #endif |
| 99 | } |
| 100 | if (send(s, sin, packet, size) < 0) |
| 101 | perror("send"); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Return 1 if the address is for an Internet host, |
| 106 | * otherwise assume it's a network address (broadcast). |
| 107 | */ |
| 108 | inet_checkhost(sin) |
| 109 | struct sockaddr_in *sin; |
| 110 | { |
| 111 | extern struct in_addr if_makeaddr(); |
| 112 | struct in_addr netaddr; |
| 113 | |
| 114 | netaddr = if_makeaddr((int)sin->sin_addr.s_net, INADDR_ANY); |
| 115 | return (netaddr.s_addr != sin->sin_addr.s_addr); |
| 116 | } |
| 117 | |
| 118 | inet_canon(sin) |
| 119 | struct sockaddr_in *sin; |
| 120 | { |
| 121 | sin->sin_port = 0; |
| 122 | } |
| 123 | |
| 124 | /*ARGSUSED*/ |
| 125 | null_hash(addr, hp) |
| 126 | struct sockaddr *addr; |
| 127 | struct afhash *hp; |
| 128 | { |
| 129 | |
| 130 | hp->afh_nethash = hp->afh_hosthash = 0; |
| 131 | } |
| 132 | |
| 133 | /*ARGSUSED*/ |
| 134 | null_netmatch(a1, a2) |
| 135 | struct sockaddr *a1, *a2; |
| 136 | { |
| 137 | |
| 138 | return (0); |
| 139 | } |
| 140 | |
| 141 | /*ARGSUSED*/ |
| 142 | null_output(s, a1, n) |
| 143 | int s; |
| 144 | struct sockaddr *a1; |
| 145 | int n; |
| 146 | { |
| 147 | |
| 148 | ; |
| 149 | } |
| 150 | |
| 151 | /*ARGSUSED*/ |
| 152 | null_portmatch(a1) |
| 153 | struct sockaddr *a1; |
| 154 | { |
| 155 | |
| 156 | return (0); |
| 157 | } |
| 158 | |
| 159 | /*ARGSUSED*/ |
| 160 | null_portcheck(a1) |
| 161 | struct sockaddr *a1; |
| 162 | { |
| 163 | |
| 164 | return (0); |
| 165 | } |
| 166 | |
| 167 | /*ARGSUSED*/ |
| 168 | null_checkhost(a1) |
| 169 | struct sockaddr *a1; |
| 170 | { |
| 171 | |
| 172 | return (0); |
| 173 | } |
| 174 | |
| 175 | /*ARGSUSED*/ |
| 176 | null_canon(a1) |
| 177 | struct sockaddr *a1; |
| 178 | { |
| 179 | |
| 180 | ; |
| 181 | } |