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ripd: code simplification for redistribution.

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Use loops and variables instead of doing each cases by hand.
Use boolean instead of having 2 almost identical functions.
This commit is contained in:
Matthieu Boutier 2016-09-22 18:11:05 -03:00 committed by Donald Sharp
parent ee5bb56117
commit 7c989d74b5
1 changed files with 25 additions and 93 deletions
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118
ripd/ripd.c
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@ -316,32 +316,35 @@ rip_timeout_update (struct rip_info *rinfo)
}
static int
rip_incoming_filter (struct prefix_ipv4 *p, struct rip_interface *ri)
rip_filter (int rip_distribute, struct prefix_ipv4 *p, struct rip_interface *ri)
{
struct distribute *dist;
struct access_list *alist;
struct prefix_list *plist;
int distribute = rip_distribute == RIP_FILTER_OUT ?
DISTRIBUTE_OUT : DISTRIBUTE_IN;
const char *inout = rip_distribute == RIP_FILTER_OUT ? "out" : "in";
/* Input distribute-list filtering. */
if (ri->list[RIP_FILTER_IN])
if (ri->list[rip_distribute])
{
if (access_list_apply (ri->list[RIP_FILTER_IN],
if (access_list_apply (ri->list[rip_distribute],
(struct prefix *) p) == FILTER_DENY)
{
if (IS_RIP_DEBUG_PACKET)
zlog_debug ("%s/%d filtered by distribute in",
inet_ntoa (p->prefix), p->prefixlen);
zlog_debug ("%s/%d filtered by distribute %s",
inet_ntoa (p->prefix), p->prefixlen, inout);
return -1;
}
}
if (ri->prefix[RIP_FILTER_IN])
if (ri->prefix[rip_distribute])
{
if (prefix_list_apply (ri->prefix[RIP_FILTER_IN],
if (prefix_list_apply (ri->prefix[rip_distribute],
(struct prefix *) p) == PREFIX_DENY)
{
if (IS_RIP_DEBUG_PACKET)
zlog_debug ("%s/%d filtered by prefix-list in",
inet_ntoa (p->prefix), p->prefixlen);
zlog_debug ("%s/%d filtered by prefix-list %s",
inet_ntoa (p->prefix), p->prefixlen, inout);
return -1;
}
}
@ -350,104 +353,33 @@ rip_incoming_filter (struct prefix_ipv4 *p, struct rip_interface *ri)
dist = distribute_lookup (NULL);
if (dist)
{
if (dist->list[DISTRIBUTE_IN])
if (dist->list[distribute])
{
alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_IN]);
alist = access_list_lookup (AFI_IP, dist->list[distribute]);
if (alist)
{
if (access_list_apply (alist,
(struct prefix *) p) == FILTER_DENY)
if (access_list_apply (alist, (struct prefix *) p) == FILTER_DENY)
{
if (IS_RIP_DEBUG_PACKET)
zlog_debug ("%s/%d filtered by distribute in",
inet_ntoa (p->prefix), p->prefixlen);
zlog_debug ("%s/%d filtered by distribute %s",
inet_ntoa (p->prefix), p->prefixlen, inout);
return -1;
}
}
}
if (dist->prefix[DISTRIBUTE_IN])
if (dist->prefix[distribute])
{
plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_IN]);
plist = prefix_list_lookup (AFI_IP, dist->prefix[distribute]);
if (plist)
{
if (prefix_list_apply (plist,
(struct prefix *) p) == PREFIX_DENY)
{
if (IS_RIP_DEBUG_PACKET)
zlog_debug ("%s/%d filtered by prefix-list in",
inet_ntoa (p->prefix), p->prefixlen);
return -1;
}
}
}
}
return 0;
}
static int
rip_outgoing_filter (struct prefix_ipv4 *p, struct rip_interface *ri)
{
struct distribute *dist;
struct access_list *alist;
struct prefix_list *plist;
if (ri->list[RIP_FILTER_OUT])
{
if (access_list_apply (ri->list[RIP_FILTER_OUT],
(struct prefix *) p) == FILTER_DENY)
{
if (IS_RIP_DEBUG_PACKET)
zlog_debug ("%s/%d is filtered by distribute out",
inet_ntoa (p->prefix), p->prefixlen);
return -1;
}
}
if (ri->prefix[RIP_FILTER_OUT])
{
if (prefix_list_apply (ri->prefix[RIP_FILTER_OUT],
(struct prefix *) p) == PREFIX_DENY)
{
if (IS_RIP_DEBUG_PACKET)
zlog_debug ("%s/%d is filtered by prefix-list out",
inet_ntoa (p->prefix), p->prefixlen);
return -1;
}
}
/* All interface filter check. */
dist = distribute_lookup (NULL);
if (dist)
{
if (dist->list[DISTRIBUTE_OUT])
{
alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_OUT]);
if (alist)
{
if (access_list_apply (alist,
(struct prefix *) p) == FILTER_DENY)
{
if (IS_RIP_DEBUG_PACKET)
zlog_debug ("%s/%d filtered by distribute out",
inet_ntoa (p->prefix), p->prefixlen);
return -1;
}
}
}
if (dist->prefix[DISTRIBUTE_OUT])
{
plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_OUT]);
if (plist)
{
if (prefix_list_apply (plist,
(struct prefix *) p) == PREFIX_DENY)
{
if (IS_RIP_DEBUG_PACKET)
zlog_debug ("%s/%d filtered by prefix-list out",
inet_ntoa (p->prefix), p->prefixlen);
zlog_debug ("%s/%d filtered by prefix-list %s",
inet_ntoa (p->prefix), p->prefixlen, inout);
return -1;
}
}
@ -511,7 +443,7 @@ rip_rte_process (struct rte *rte, struct sockaddr_in *from,
/* Apply input filters. */
ri = ifp->info;
ret = rip_incoming_filter (&p, ri);
ret = rip_filter (RIP_FILTER_IN, &p, ri);
if (ret < 0)
return;
@ -2301,7 +2233,7 @@ rip_output_process (struct connected *ifc, struct sockaddr_in *to,
p = (struct prefix_ipv4 *) &rp->p;
/* Apply output filters. */
ret = rip_outgoing_filter (p, ri);
ret = rip_filter (RIP_FILTER_OUT, p, ri);
if (ret < 0)
continue;