bgpd: Adding BGP GR Global & Per Neighbour FSM changes

[mirror_frr.git] / bgpd / bgp_flowspec_util.c

diff --git a/bgpd/bgp_flowspec_util.c b/bgpd/bgp_flowspec_util.c
index 9f92a3c3a66b847166be9e858a76342b7e78320c..b9a0d81cc5a149207136bf8fbcbbaa031ec89400 100644 (file)
--- a/bgpd/bgp_flowspec_util.c
+++ b/bgpd/bgp_flowspec_util.c
@@ -23,6 +23,7 @@
 #include "prefix.h"
 #include "lib_errors.h"
 
+#include "bgp_route.h"
 #include "bgp_table.h"
 #include "bgp_flowspec_util.h"
 #include "bgp_flowspec_private.h"
@@ -68,9 +69,8 @@ static int bgp_flowspec_call_non_opaque_decode(uint8_t *nlri_content, int len,
                             len,
                             mval, error);
        if (*error < 0)
-               flog_err(BGP_ERR_FLOWSPEC_PACKET,
-                         "%s: flowspec_op_decode error %d",
-                         __func__, *error);
+               flog_err(EC_BGP_FLOWSPEC_PACKET,
+                        "%s: flowspec_op_decode error %d", __func__, *error);
        else
                *match_num = *error;
        return ret;
@@ -447,11 +447,19 @@ int bgp_flowspec_match_rules_fill(uint8_t *nlri_content, int len,
                                        len - offset,
                                        prefix, &error);
                        if (error < 0)
-                               flog_err(BGP_ERR_FLOWSPEC_PACKET,
-                                         "%s: flowspec_ip_address error %d",
-                                         __func__, error);
-                       else
-                               bpem->match_bitmask |= bitmask;
+                               flog_err(EC_BGP_FLOWSPEC_PACKET,
+                                        "%s: flowspec_ip_address error %d",
+                                        __func__, error);
+                       else {
+                               /* if src or dst address is 0.0.0.0,
+                                * ignore that rule
+                                */
+                               if (prefix->family == AF_INET
+                                   && prefix->u.prefix4.s_addr == 0)
+                                       bpem->match_bitmask_iprule |= bitmask;
+                               else
+                                       bpem->match_bitmask |= bitmask;
+                       }
                        offset += ret;
                        break;
                case FLOWSPEC_IP_PROTOCOL:
@@ -542,9 +550,10 @@ int bgp_flowspec_match_rules_fill(uint8_t *nlri_content, int len,
                                        len - offset,
                                        &bpem->tcpflags, &error);
                        if (error < 0)
-                               flog_err(BGP_ERR_FLOWSPEC_PACKET,
-                                         "%s: flowspec_tcpflags_decode error %d",
-                                         __func__, error);
+                               flog_err(
+                                       EC_BGP_FLOWSPEC_PACKET,
+                                       "%s: flowspec_tcpflags_decode error %d",
+                                       __func__, error);
                        else
                                bpem->match_tcpflags_num = error;
                        /* contains the number of slots used */
@@ -557,17 +566,58 @@ int bgp_flowspec_match_rules_fill(uint8_t *nlri_content, int len,
                                        len - offset, &bpem->fragment,
                                        &error);
                        if (error < 0)
-                               flog_err(BGP_ERR_FLOWSPEC_PACKET,
-                                         "%s: flowspec_fragment_type_decode error %d",
-                                         __func__, error);
+                               flog_err(
+                                       EC_BGP_FLOWSPEC_PACKET,
+                                       "%s: flowspec_fragment_type_decode error %d",
+                                       __func__, error);
                        else
                                bpem->match_fragment_num = error;
                        offset += ret;
                        break;
                default:
-                       flog_err(LIB_ERR_DEVELOPMENT, "%s: unknown type %d\n",
-                                 __func__, type);
+                       flog_err(EC_LIB_DEVELOPMENT, "%s: unknown type %d\n",
+                                __func__, type);
                }
        }
+       if (bpem->match_packet_length_num || bpem->match_fragment_num ||
+           bpem->match_tcpflags_num || bpem->match_dscp_num ||
+           bpem->match_packet_length_num || bpem->match_icmp_code_num ||
+           bpem->match_icmp_type_num || bpem->match_port_num ||
+           bpem->match_src_port_num || bpem->match_dst_port_num ||
+           bpem->match_protocol_num || bpem->match_bitmask)
+               bpem->type = BGP_PBR_IPSET;
+       else if ((bpem->match_bitmask_iprule & PREFIX_SRC_PRESENT) ||
+                (bpem->match_bitmask_iprule & PREFIX_DST_PRESENT))
+               /* the extracted policy rule may not need an
+                * iptables/ipset filtering. check this may not be
+                * a standard ip rule : permit any to any ( eg)
+                */
+               bpem->type = BGP_PBR_IPRULE;
+       else
+               bpem->type = BGP_PBR_UNDEFINED;
        return error;
 }
+
+/* return 1 if FS entry invalid or no NH IP */
+int bgp_flowspec_get_first_nh(struct bgp *bgp, struct bgp_path_info *pi,
+                             struct prefix *p)
+{
+       struct bgp_pbr_entry_main api;
+       int i;
+       struct bgp_node *rn = pi->net;
+       struct bgp_pbr_entry_action *api_action;
+
+       memset(&api, 0, sizeof(struct bgp_pbr_entry_main));
+       if (bgp_pbr_build_and_validate_entry(&rn->p, pi, &api) < 0)
+               return 1;
+       for (i = 0; i < api.action_num; i++) {
+               api_action = &api.actions[i];
+               if (api_action->action != ACTION_REDIRECT_IP)
+                       continue;
+               p->family = AF_INET;
+               p->prefixlen = IPV4_MAX_BITLEN;
+               p->u.prefix4 = api_action->u.zr.redirect_ip_v4;
+               return 0;
+       }
+       return 1;
+}