static char sccsid
[] = "@(#)output.c 4.4 (Berkeley) 6/1/83";
* Routing Table Management Daemon
* Apply the function "f" to all non-passive
* interfaces. If the interface supports the
* use of broadcasting use it, otherwise address
* the output to the known router.
register struct interface
*ifp
;
register struct sockaddr
*dst
;
extern struct interface
*ifnet
;
for (ifp
= ifnet
; ifp
; ifp
= ifp
->int_next
) {
if (ifp
->int_flags
& IFF_PASSIVE
)
dst
= ifp
->int_flags
& IFF_BROADCAST
? &ifp
->int_broadaddr
:
ifp
->int_flags
& IFF_POINTOPOINT
? &ifp
->int_dstaddr
:
flags
= ifp
->int_flags
& IFF_INTERFACE
? MSG_DONTROUTE
: 0;
* Output a preformed packet.
(*afswitch
[dst
->sa_family
].af_output
)(s
, flags
,
dst
, sizeof (struct rip
));
TRACE_OUTPUT(ifp
, dst
, sizeof (struct rip
));
* Supply dst with the contents of the routing tables.
* If this won't fit in one packet, chop it up into several.
register struct rt_entry
*rt
;
struct netinfo
*n
= msg
->rip_nets
;
register struct rthash
*rh
;
struct rthash
*base
= hosthash
;
int (*output
)() = afswitch
[dst
->sa_family
].af_output
;
msg
->rip_cmd
= RIPCMD_RESPONSE
;
msg
->rip_vers
= RIPVERSION
;
for (rh
= base
; rh
< &base
[ROUTEHASHSIZ
]; rh
++)
for (rt
= rh
->rt_forw
; rt
!= (struct rt_entry
*)rh
; rt
= rt
->rt_forw
) {
size
= (char *)n
- packet
;
if (size
> MAXPACKETSIZE
- sizeof (struct netinfo
)) {
(*output
)(s
, flags
, dst
, size
);
TRACE_OUTPUT(ifp
, dst
, size
);
n
->rip_dst
.sa_family
= htons(n
->rip_dst
.sa_family
);
n
->rip_metric
= htonl(min(rt
->rt_metric
+ 1, HOPCNT_INFINITY
));
if (n
!= msg
->rip_nets
) {
size
= (char *)n
- packet
;
(*output
)(s
, flags
, dst
, size
);
TRACE_OUTPUT(ifp
, dst
, size
);