zserv: simplify handling of route delete requests

Route attributes like tag, distance and metric are irrelevant when we
want to delete a route from a client daemon. The same can be said about
the nexthops of the route. Only the IP prefix and client protocol are
enough to identify the route we want to remove, considering that zebra
maintains at most one route from each client daemon for each prefix. Once
rib_delete() is called, it deletes the selected route with all of its
nexthops.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

diff --git a/zebra/zserv.c b/zebra/zserv.c
index b2ee9c0b476271ad3ac546cb7e29e810e780d0dc..a196eb5945d3049bcbe2d21566eeb076f1a9796e 100644 (file)
--- a/zebra/zserv.c
+++ b/zebra/zserv.c
@@ -1281,21 +1281,12 @@ static int zread_ipv4_add(struct zserv *client, u_short length,
 static int zread_ipv4_delete(struct zserv *client, u_short length,
                             struct zebra_vrf *zvrf)
 {
-       int i;
        struct stream *s;
        struct zapi_ipv4 api;
-       struct in_addr nexthop;
-       union g_addr *nexthop_p;
-       unsigned long ifindex;
        struct prefix p;
-       u_char nexthop_num;
-       u_char nexthop_type;
        u_int32_t table_id;
 
        s = client->ibuf;
-       ifindex = 0;
-       nexthop.s_addr = 0;
-       nexthop_p = NULL;
 
        /* Type, flags, message. */
        api.type = stream_getc(s);
@@ -1310,63 +1301,10 @@ static int zread_ipv4_delete(struct zserv *client, u_short length,
        p.prefixlen = stream_getc(s);
        stream_get(&p.u.prefix4, s, PSIZE(p.prefixlen));
 
-       /* Nexthop, ifindex, distance, metric. */
-       if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)) {
-               nexthop_num = stream_getc(s);
-
-               for (i = 0; i < nexthop_num; i++) {
-                       nexthop_type = stream_getc(s);
-
-                       switch (nexthop_type) {
-                       case NEXTHOP_TYPE_IFINDEX:
-                               ifindex = stream_getl(s);
-                               break;
-                       case NEXTHOP_TYPE_IPV4:
-                               nexthop.s_addr = stream_get_ipv4(s);
-                               /* For labeled-unicast, each nexthop is followed
-                                * by label, but
-                                * we don't care for delete.
-                                */
-                               if (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL))
-                                       stream_forward_getp(s,
-                                                           sizeof(u_int32_t));
-                               nexthop_p = (union g_addr *)&nexthop;
-                               break;
-                       case NEXTHOP_TYPE_IPV4_IFINDEX:
-                               nexthop.s_addr = stream_get_ipv4(s);
-                               nexthop_p = (union g_addr *)&nexthop;
-                               ifindex = stream_getl(s);
-                               break;
-                       case NEXTHOP_TYPE_IPV6:
-                               stream_forward_getp(s, IPV6_MAX_BYTELEN);
-                               break;
-                       }
-               }
-       }
-
-       /* Distance. */
-       if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
-               api.distance = stream_getc(s);
-       else
-               api.distance = 0;
-
-       /* Metric. */
-       if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
-               api.metric = stream_getl(s);
-       else
-               api.metric = 0;
-
-       /* tag */
-       if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
-               api.tag = stream_getl(s);
-       else
-               api.tag = 0;
-
        table_id = zvrf->table_id;
 
        rib_delete(AFI_IP, api.safi, zvrf_id(zvrf), api.type, api.instance,
-                  api.flags, &p, NULL, nexthop_p, ifindex, table_id,
-                  api.metric);
+                  api.flags, &p, NULL, NULL, 0, table_id, 0);
        client->v4_route_del_cnt++;
        return 0;
 }
@@ -1688,18 +1626,12 @@ static int zread_ipv6_add(struct zserv *client, u_short length,
 static int zread_ipv6_delete(struct zserv *client, u_short length,
                             struct zebra_vrf *zvrf)
 {
-       int i;
        struct stream *s;
        struct zapi_ipv6 api;
-       struct in6_addr nexthop;
-       union g_addr *pnexthop = NULL;
-       unsigned long ifindex;
        struct prefix p;
        struct prefix_ipv6 src_p, *src_pp;
 
        s = client->ibuf;
-       ifindex = 0;
-       memset(&nexthop, 0, sizeof(struct in6_addr));
 
        /* Type, flags, message. */
        api.type = stream_getc(s);
@@ -1723,59 +1655,8 @@ static int zread_ipv6_delete(struct zserv *client, u_short length,
        } else
                src_pp = NULL;
 
-       /* Nexthop, ifindex, distance, metric. */
-       if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)) {
-               u_char nexthop_type;
-
-               api.nexthop_num = stream_getc(s);
-               for (i = 0; i < api.nexthop_num; i++) {
-                       nexthop_type = stream_getc(s);
-
-                       switch (nexthop_type) {
-                       case NEXTHOP_TYPE_IPV6:
-                               stream_get(&nexthop, s, 16);
-                               /* For labeled-unicast, each nexthop is followed
-                                * by label, but
-                                * we don't care for delete.
-                                */
-                               if (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL))
-                                       stream_forward_getp(s,
-                                                           sizeof(u_int32_t));
-                               pnexthop = (union g_addr *)&nexthop;
-                               break;
-                       case NEXTHOP_TYPE_IFINDEX:
-                               ifindex = stream_getl(s);
-                               break;
-                       }
-               }
-       }
-
-       /* Distance. */
-       if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
-               api.distance = stream_getc(s);
-       else
-               api.distance = 0;
-
-       /* Metric. */
-       if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
-               api.metric = stream_getl(s);
-       else
-               api.metric = 0;
-
-       /* tag */
-       if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
-               api.tag = stream_getl(s);
-       else
-               api.tag = 0;
-
-       if (IN6_IS_ADDR_UNSPECIFIED(&nexthop))
-               rib_delete(AFI_IP6, api.safi, zvrf_id(zvrf), api.type,
-                          api.instance, api.flags, &p, src_pp, NULL, ifindex,
-                          client->rtm_table, api.metric);
-       else
-               rib_delete(AFI_IP6, api.safi, zvrf_id(zvrf), api.type,
-                          api.instance, api.flags, &p, src_pp, pnexthop,
-                          ifindex, client->rtm_table, api.metric);
+       rib_delete(AFI_IP6, api.safi, zvrf_id(zvrf), api.type, api.instance,
+                  api.flags, &p, src_pp, NULL, 0, client->rtm_table, 0);
 
        client->v6_route_del_cnt++;
        return 0;