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Diffstat (limited to 'proto/rip/packets.c')
-rw-r--r--proto/rip/packets.c60
1 files changed, 31 insertions, 29 deletions
diff --git a/proto/rip/packets.c b/proto/rip/packets.c
index 9f10fd67..4fc832d5 100644
--- a/proto/rip/packets.c
+++ b/proto/rip/packets.c
@@ -78,8 +78,7 @@ struct rip_auth_tail
/* Internal representation of RTE block data */
struct rip_block
{
- ip_addr prefix;
- int pxlen;
+ net_addr net;
u32 metric;
u16 tag;
u16 no_af;
@@ -115,17 +114,17 @@ rip_put_block(struct rip_proto *p, byte *pos, struct rip_block *rte)
struct rip_block_v2 *block = (void *) pos;
block->family = rte->no_af ? 0 : htons(RIP_AF_IPV4);
block->tag = htons(rte->tag);
- block->network = ip4_hton(ipa_to_ip4(rte->prefix));
- block->netmask = ip4_hton(ip4_mkmask(rte->pxlen));
+ block->network = ip4_hton(net4_prefix(&rte->net));
+ block->netmask = ip4_hton(ip4_mkmask(net4_pxlen(&rte->net)));
block->next_hop = ip4_hton(ipa_to_ip4(rte->next_hop));
block->metric = htonl(rte->metric);
}
else /* RIPng */
{
struct rip_block_ng *block = (void *) pos;
- block->prefix = ip6_hton(ipa_to_ip6(rte->prefix));
+ block->prefix = ip6_hton(net6_prefix(&rte->net));
block->tag = htons(rte->tag);
- block->pxlen = rte->pxlen;
+ block->pxlen = net6_pxlen(&rte->net);
block->metric = rte->metric;
}
}
@@ -151,8 +150,8 @@ rip_get_block(struct rip_proto *p, byte *pos, struct rip_block *rte)
if (block->family != (rte->no_af ? 0 : htons(RIP_AF_IPV4)))
return 0;
- rte->prefix = ipa_from_ip4(ip4_ntoh(block->network));
- rte->pxlen = ip4_masklen(ip4_ntoh(block->netmask));
+ uint pxlen = ip4_masklen(ip4_ntoh(block->netmask));
+ net_fill_ip4(&rte->net, ip4_ntoh(block->network), pxlen);
rte->metric = ntohl(block->metric);
rte->tag = ntohs(block->tag);
rte->next_hop = ipa_from_ip4(ip4_ntoh(block->next_hop));
@@ -171,8 +170,8 @@ rip_get_block(struct rip_proto *p, byte *pos, struct rip_block *rte)
return 0;
}
- rte->prefix = ipa_from_ip6(ip6_ntoh(block->prefix));
- rte->pxlen = block->pxlen;
+ uint pxlen = (block->pxlen < IP6_MAX_PREFIX_LENGTH) ? block->pxlen : 255;
+ net_fill_ip6(&rte->net, ip6_ntoh(block->prefix), pxlen);
rte->metric = block->metric;
rte->tag = ntohs(block->tag);
/* rte->next_hop is deliberately kept unmodified */;
@@ -383,8 +382,9 @@ rip_receive_request(struct rip_proto *p, struct rip_iface *ifa, struct rip_packe
if (!rip_get_block(p, pos, &b))
return;
- /* Special case - zero prefix, infinity metric */
- if (ipa_nonzero(b.prefix) || b.pxlen || (b.metric != p->infinity))
+ /* Special case - infinity metric, for RIPng also zero prefix */
+ if ((b.metric != p->infinity) ||
+ (rip_is_ng(p) && !net_zero_ip6((net_addr_ip6 *) &b.net)))
return;
/* We do nothing if TX is already active */
@@ -442,23 +442,23 @@ rip_send_response(struct rip_proto *p, struct rip_iface *ifa)
}
struct rip_block rte = {
- .prefix = en->n.prefix,
- .pxlen = en->n.pxlen,
.metric = en->metric,
.tag = en->tag
};
+ net_copy(&rte.net, en->n.addr);
+
if (en->iface == ifa->iface)
rte.next_hop = en->next_hop;
if (rip_is_v2(p) && (ifa->cf->version == RIP_V1))
{
/* Skipping subnets (i.e. not hosts, classful networks or default route) */
- if (ip4_masklen(ip4_class_mask(ipa_to_ip4(en->n.prefix))) != en->n.pxlen)
+ if (ip4_masklen(ip4_class_mask(net4_prefix(&rte.net))) != rte.net.pxlen)
goto next_entry;
rte.tag = 0;
- rte.pxlen = 0;
+ rte.net.pxlen = 0;
rte.next_hop = IPA_NONE;
}
@@ -474,7 +474,7 @@ rip_send_response(struct rip_proto *p, struct rip_iface *ifa)
goto next_entry;
}
- // TRACE(D_PACKETS, " %I/%d -> %I metric %d", rte.prefix, rte.pxlen, rte.next_hop, rte.metric);
+ // TRACE(D_PACKETS, " %N -> %I metric %d", &rte.net, rte.next_hop, rte.metric);
/* RIPng next hop entry */
if (rip_is_ng(p) && !ipa_equal(rte.next_hop, last_next_hop))
@@ -575,23 +575,25 @@ rip_receive_response(struct rip_proto *p, struct rip_iface *ifa, struct rip_pack
if (!rip_get_block(p, pos, &rte))
continue;
- int c = ipa_classify_net(rte.prefix);
- if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK))
- SKIP("invalid prefix");
-
if (rip_is_v2(p) && (pkt->version == RIP_V1))
{
- if (ifa->cf->check_zero && (rte.tag || rte.pxlen || ipa_nonzero(rte.next_hop)))
+ if (ifa->cf->check_zero && (rte.tag || rte.net.pxlen || ipa_nonzero(rte.next_hop)))
SKIP("RIPv1 reserved field is nonzero");
rte.tag = 0;
- rte.pxlen = ip4_masklen(ip4_class_mask(ipa_to_ip4(rte.prefix)));
+ rte.net.pxlen = ip4_masklen(ip4_class_mask(net4_prefix(&rte.net)));
rte.next_hop = IPA_NONE;
}
- if ((rte.pxlen < 0) || (rte.pxlen > MAX_PREFIX_LENGTH))
+ if (rte.net.pxlen == 255)
SKIP("invalid prefix length");
+ net_normalize(&rte.net);
+
+ int c = net_classify(&rte.net);
+ if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK))
+ SKIP("invalid prefix");
+
if (rte.metric > p->infinity)
SKIP("invalid metric");
@@ -602,7 +604,7 @@ rip_receive_response(struct rip_proto *p, struct rip_iface *ifa, struct rip_pack
rte.next_hop = IPA_NONE;
}
- // TRACE(D_PACKETS, " %I/%d -> %I metric %d", rte.prefix, rte.pxlen, rte.next_hop, rte.metric);
+ // TRACE(D_PACKETS, " %N -> %I metric %d", &rte.net.n, rte.next_hop, rte.metric);
rte.metric += ifa->cf->metric;
@@ -616,16 +618,16 @@ rip_receive_response(struct rip_proto *p, struct rip_iface *ifa, struct rip_pack
.expires = now + ifa->cf->timeout_time
};
- rip_update_rte(p, &rte.prefix, rte.pxlen, &new);
+ rip_update_rte(p, &rte.net, &new);
}
else
- rip_withdraw_rte(p, &rte.prefix, rte.pxlen, from);
+ rip_withdraw_rte(p, &rte.net, from);
continue;
skip:
- LOG_RTE("Ignoring route %I/%d received from %I - %s",
- rte.prefix, rte.pxlen, from->nbr->addr, err_dsc);
+ LOG_RTE("Ignoring route %N received from %I - %s",
+ &rte.net, from->nbr->addr, err_dsc);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 10:25:59 +0000