projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 7e7de0c9 SL |
1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)output.c 4.1 %G%"; | |
| 3 | #endif | |
| 4 | ||
| 5 | /* | |
| 6 | * Routing Table Management Daemon | |
| 7 | */ | |
| 8 | #include "router.h" | |
| 9 | ||
| 10 | /* | |
| 11 | * Apply the function "f" to all non-passive | |
| 12 | * interfaces. If the interface supports the | |
| 13 | * use of broadcasting use it, otherwise address | |
| 14 | * the output to the known router. | |
| 15 | */ | |
| 16 | toall(f) | |
| 17 | int (*f)(); | |
| 18 | { | |
| 19 | register struct interface *ifp; | |
| 20 | register struct sockaddr *dst; | |
| 21 | extern struct interface *ifnet; | |
| 22 | ||
| 23 | for (ifp = ifnet; ifp; ifp = ifp->int_next) { | |
| 24 | if (ifp->int_flags & IFF_PASSIVE) | |
| 25 | continue; | |
| 26 | dst = ifp->int_flags & IFF_BROADCAST ? &ifp->int_broadaddr : | |
| 27 | ifp->int_flags & IFF_POINTOPOINT ? &ifp->int_dstaddr : | |
| 28 | &ifp->int_addr; | |
| 29 | (*f)(dst, ifp->int_flags & IFF_INTERFACE, ifp); | |
| 30 | } | |
| 31 | } | |
| 32 | ||
| 33 | /* | |
| 34 | * Output a preformed packet. | |
| 35 | */ | |
| 36 | /*ARGSUSED*/ | |
| 37 | sendmsg(dst, dontroute, ifp) | |
| 38 | struct sockaddr *dst; | |
| 39 | int dontroute; | |
| 40 | struct interface *ifp; | |
| 41 | { | |
| 42 | ||
| 43 | (*afswitch[dst->sa_family].af_output)(dontroute ? snoroute : s, | |
| 44 | dst, sizeof (struct rip)); | |
| 45 | TRACE_OUTPUT(ifp, dst, sizeof (struct rip)); | |
| 46 | } | |
| 47 | ||
| 48 | /* | |
| 49 | * Supply dst with the contents of the routing tables. | |
| 50 | * If this won't fit in one packet, chop it up into several. | |
| 51 | */ | |
| 52 | supply(dst, dontroute, ifp) | |
| 53 | struct sockaddr *dst; | |
| 54 | struct interface *ifp; | |
| 55 | { | |
| 56 | register struct rt_entry *rt; | |
| 57 | struct netinfo *n = msg->rip_nets; | |
| 58 | register struct rthash *rh; | |
| 59 | struct rthash *base = hosthash; | |
| 60 | int doinghost = 1, size; | |
| 61 | int (*output)() = afswitch[dst->sa_family].af_output; | |
| 62 | int sto = dontroute ? snoroute : s; | |
| 63 | ||
| 64 | msg->rip_cmd = RIPCMD_RESPONSE; | |
| 65 | again: | |
| 66 | for (rh = base; rh < &base[ROUTEHASHSIZ]; rh++) | |
| 67 | for (rt = rh->rt_forw; rt != (struct rt_entry *)rh; rt = rt->rt_forw) { | |
| 68 | size = (char *)n - packet; | |
| 69 | if (size > MAXPACKETSIZE - sizeof (struct netinfo)) { | |
| 70 | (*output)(sto, dst, size); | |
| 71 | TRACE_OUTPUT(ifp, dst, size); | |
| 72 | n = msg->rip_nets; | |
| 73 | } | |
| 74 | n->rip_dst = rt->rt_dst; | |
| 75 | n->rip_metric = min(rt->rt_metric + 1, HOPCNT_INFINITY); | |
| 76 | n++; | |
| 77 | } | |
| 78 | if (doinghost) { | |
| 79 | doinghost = 0; | |
| 80 | base = nethash; | |
| 81 | goto again; | |
| 82 | } | |
| 83 | if (n != msg->rip_nets) { | |
| 84 | size = (char *)n - packet; | |
| 85 | (*output)(sto, dst, size); | |
| 86 | TRACE_OUTPUT(ifp, dst, size); | |
| 87 | } | |
| 88 | } |