Commit | Line | Data |
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5ff67f98 | 1 | /* |
2d222ff5 | 2 | * Copyright (c) 1983, 1988 Regents of the University of California. |
0eb85d71 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
b8c620d6 KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
5ff67f98 DF |
16 | */ |
17 | ||
7e7de0c9 | 18 | #ifndef lint |
b8c620d6 | 19 | static char sccsid[] = "@(#)output.c 5.11 (Berkeley) %G%"; |
0eb85d71 | 20 | #endif /* not lint */ |
7e7de0c9 SL |
21 | |
22 | /* | |
23 | * Routing Table Management Daemon | |
24 | */ | |
7fe7fe74 | 25 | #include "defs.h" |
7e7de0c9 SL |
26 | |
27 | /* | |
28 | * Apply the function "f" to all non-passive | |
29 | * interfaces. If the interface supports the | |
30 | * use of broadcasting use it, otherwise address | |
31 | * the output to the known router. | |
32 | */ | |
33 | toall(f) | |
34 | int (*f)(); | |
35 | { | |
36 | register struct interface *ifp; | |
37 | register struct sockaddr *dst; | |
7fe7fe74 | 38 | register int flags; |
7e7de0c9 SL |
39 | extern struct interface *ifnet; |
40 | ||
41 | for (ifp = ifnet; ifp; ifp = ifp->int_next) { | |
42 | if (ifp->int_flags & IFF_PASSIVE) | |
43 | continue; | |
44 | dst = ifp->int_flags & IFF_BROADCAST ? &ifp->int_broadaddr : | |
45 | ifp->int_flags & IFF_POINTOPOINT ? &ifp->int_dstaddr : | |
46 | &ifp->int_addr; | |
55d340a4 | 47 | flags = ifp->int_flags & IFF_INTERFACE ? MSG_DONTROUTE : 0; |
7fe7fe74 | 48 | (*f)(dst, flags, ifp); |
7e7de0c9 SL |
49 | } |
50 | } | |
51 | ||
52 | /* | |
53 | * Output a preformed packet. | |
54 | */ | |
55 | /*ARGSUSED*/ | |
7fe7fe74 | 56 | sendmsg(dst, flags, ifp) |
7e7de0c9 | 57 | struct sockaddr *dst; |
7fe7fe74 | 58 | int flags; |
7e7de0c9 SL |
59 | struct interface *ifp; |
60 | { | |
61 | ||
7fe7fe74 | 62 | (*afswitch[dst->sa_family].af_output)(s, flags, |
7e7de0c9 SL |
63 | dst, sizeof (struct rip)); |
64 | TRACE_OUTPUT(ifp, dst, sizeof (struct rip)); | |
65 | } | |
66 | ||
67 | /* | |
68 | * Supply dst with the contents of the routing tables. | |
69 | * If this won't fit in one packet, chop it up into several. | |
70 | */ | |
7fe7fe74 | 71 | supply(dst, flags, ifp) |
7e7de0c9 | 72 | struct sockaddr *dst; |
7fe7fe74 | 73 | int flags; |
7892134c | 74 | register struct interface *ifp; |
7e7de0c9 SL |
75 | { |
76 | register struct rt_entry *rt; | |
7892134c | 77 | register struct netinfo *n = msg->rip_nets; |
7e7de0c9 SL |
78 | register struct rthash *rh; |
79 | struct rthash *base = hosthash; | |
80 | int doinghost = 1, size; | |
81 | int (*output)() = afswitch[dst->sa_family].af_output; | |
7892134c | 82 | int (*sendroute)() = afswitch[dst->sa_family].af_sendroute; |
f2ce7d44 | 83 | int npackets = 0; |
7e7de0c9 SL |
84 | |
85 | msg->rip_cmd = RIPCMD_RESPONSE; | |
55d340a4 | 86 | msg->rip_vers = RIPVERSION; |
eabc591a | 87 | bzero(msg->rip_res1, sizeof(msg->rip_res1)); |
7e7de0c9 SL |
88 | again: |
89 | for (rh = base; rh < &base[ROUTEHASHSIZ]; rh++) | |
90 | for (rt = rh->rt_forw; rt != (struct rt_entry *)rh; rt = rt->rt_forw) { | |
4fad5a6e | 91 | /* |
7892134c MK |
92 | * Don't resend the information on the network |
93 | * from which it was received (unless sending | |
94 | * in response to a query). | |
4fad5a6e | 95 | */ |
7127cc90 MK |
96 | if (ifp && rt->rt_ifp == ifp && |
97 | (rt->rt_state & RTS_INTERFACE) == 0) | |
4fad5a6e MK |
98 | continue; |
99 | if (rt->rt_state & RTS_EXTERNAL) | |
100 | continue; | |
101 | /* | |
102 | * Limit the spread of subnet information | |
103 | * to those who are interested. | |
104 | */ | |
105 | if (doinghost == 0 && rt->rt_state & RTS_SUBNET) { | |
4fad5a6e MK |
106 | if (rt->rt_dst.sa_family != dst->sa_family) |
107 | continue; | |
7892134c | 108 | if ((*sendroute)(rt, dst) == 0) |
4fad5a6e MK |
109 | continue; |
110 | } | |
7e7de0c9 SL |
111 | size = (char *)n - packet; |
112 | if (size > MAXPACKETSIZE - sizeof (struct netinfo)) { | |
7fe7fe74 | 113 | (*output)(s, flags, dst, size); |
7e7de0c9 | 114 | TRACE_OUTPUT(ifp, dst, size); |
2d222ff5 MK |
115 | /* |
116 | * If only sending to ourselves, | |
117 | * one packet is enough to monitor interface. | |
118 | */ | |
119 | if ((ifp->int_flags & | |
120 | (IFF_BROADCAST | IFF_POINTOPOINT | IFF_REMOTE)) == 0) | |
121 | return; | |
7e7de0c9 | 122 | n = msg->rip_nets; |
f2ce7d44 | 123 | npackets++; |
7e7de0c9 SL |
124 | } |
125 | n->rip_dst = rt->rt_dst; | |
55d340a4 | 126 | n->rip_dst.sa_family = htons(n->rip_dst.sa_family); |
2d222ff5 | 127 | n->rip_metric = htonl(rt->rt_metric); |
7e7de0c9 SL |
128 | n++; |
129 | } | |
130 | if (doinghost) { | |
131 | doinghost = 0; | |
132 | base = nethash; | |
133 | goto again; | |
134 | } | |
f2ce7d44 | 135 | if (n != msg->rip_nets || npackets == 0) { |
7e7de0c9 | 136 | size = (char *)n - packet; |
7fe7fe74 | 137 | (*output)(s, flags, dst, size); |
7e7de0c9 SL |
138 | TRACE_OUTPUT(ifp, dst, size); |
139 | } | |
140 | } |