bool match_std_pkt(struct ofl_match_standard *a, struct ofl_match_standard *b) { return pkt_wild32(a->in_port, b->in_port, a->wildcards, OFPFW_IN_PORT) && pkt_dladdr(a->dl_src, b->dl_src, a->dl_src_mask) && pkt_dladdr(a->dl_dst, b->dl_dst, a->dl_dst_mask) && pkt_dlvlan(a->dl_vlan, b->dl_vlan, a->wildcards) && pkt_dlvpcp(a->dl_vlan, a->dl_vlan_pcp, b->dl_vlan, b->dl_vlan_pcp, a->wildcards) && pkt_wild16(a->dl_type, b->dl_type, a->wildcards, OFPFW_DL_TYPE) && pkt_wild8 (a->nw_tos, b->nw_tos, a->wildcards, OFPFW_NW_TOS) && pkt_wild8 (a->nw_proto, b->nw_proto, a->wildcards, OFPFW_NW_PROTO) && pkt_mask32(a->nw_src, b->nw_src, a->nw_src_mask) && pkt_mask32(a->nw_dst, b->nw_dst, a->nw_dst_mask) && pkt_wild16(a->tp_src, b->tp_src, a->wildcards, OFPFW_TP_SRC) && pkt_wild16(a->tp_dst, b->tp_dst, a->wildcards, OFPFW_TP_DST) && pkt_wild32(a->mpls_label, b->mpls_label, a->wildcards, OFPFW_MPLS_LABEL) && pkt_wild8 (a->mpls_tc, b->mpls_tc, a->wildcards, OFPFW_MPLS_TC) && pkt_mask64(a->metadata, b->metadata, a->metadata_mask); }
bool packet_match(struct ofl_match *flow_match, struct ofl_match *packet){ struct ofl_match_tlv *f; struct packet_fields *packet_f; bool ret = false; if (flow_match->header.length == 0){ return true; } /* Loop through the match fields */ HMAP_FOR_EACH(f, struct ofl_match_tlv, hmap_node, &flow_match->match_fields){ /* Check if the field is present in the packet */ // HMAP_FOR_EACH_WITH_HASH(packet_f, struct packet_fields, hmap_node, hash_int(f->header, 0), &packet->match_fields){ HMAP_FOR_EACH(packet_f, struct packet_fields, hmap_node, &packet->match_fields){ if (OXM_TYPE(f->header) == OXM_TYPE(packet_f->header)) { int field_len = OXM_LENGTH(f->header); bool has_mask = OXM_HASMASK(f->header); ret = true; if (has_mask) { field_len = field_len/2; } switch (field_len){ case (sizeof(uint8_t)):{ if (has_mask){ if (pkt_mask8(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (matches_8(f->value, packet_f->value) == 0){ return false; } break; } case (sizeof(uint16_t)):{ if (OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_VLAN_VID)) { if (*((uint16_t*)f->value) == OFPVID_NONE) return false; // we have vlan tag when we expect none else if (*((uint16_t*)f->value) == OFPVID_PRESENT && has_mask) break; // this is the case where each vlan is a match else *((uint16_t*)f->value) &= VLAN_VID_MASK; // remove CFI bit } if (OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_IPV6_EXTHDR)){ if (ipv6_eh_match(f->value, packet_f->value) == 0) { return false; } } else if (has_mask){ if (pkt_mask16(f->value,f->value+ field_len, packet_f->value) == 0){ return false; } } else { if (pkt_match_16(f->value, packet_f->value) == 0){ return false; } } break; } case (sizeof(uint32_t)):{ if (has_mask){ if (OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_IPV4_DST) || OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_IPV4_SRC) || OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_ARP_SPA) || OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_ARP_TPA)){ if (matches_mask32(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (pkt_mask32(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_IPV4_DST) || OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_IPV4_SRC) ||OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_ARP_SPA) || OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_ARP_TPA)){ if (matches_32(f->value, packet_f->value) == 0){ return false; } } else { if (pkt_match_32(f->value, packet_f->value) == 0){ return false; } } break; } case (ETH_ADDR_LEN):{ if (has_mask){ if (eth_mask(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (eth_match(f->value, packet_f->value) == 0){ return false; } break; } case (sizeof(uint64_t)):{ if (has_mask) { if (pkt_mask64(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (matches_64(f->value, packet_f->value) == 0){ return false; } break; } case (16):{ if (has_mask){ if (ipv6_mask(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (ipv6_match(f->value, packet_f->value) == 0){ return false; } break; } } // end of switch case } // end of if (OXM_TYPE(f->header) == OXM_TYPE(packet_f->header)) } // end of packet_match loop if (OXM_TYPE(f->header) == OXM_TYPE(OXM_OF_VLAN_VID)) if (*((uint16_t*)f->value) == OFPVID_NONE) ret = true; // in case the packet has no vlan and this is what was expected if (!ret) return ret; else ret = false; } // end of flow_match loop return true; }
bool packet_match(struct ofl_match *flow_match, struct ofl_match *packet){ struct ofl_match_tlv *f; struct packet_fields *packet_f; bool ret = false; if (flow_match->header.length == 0){ return true; } /*TODO: Possible combinations of VLAN_ID and masks */ HMAP_FOR_EACH_WITH_HASH(f, struct ofl_match_tlv, hmap_node,hash_int(OXM_OF_VLAN_VID, 0), &flow_match->match_fields){ uint16_t *matchv = (uint16_t*) f->value; /* Check if the field is present in the packet */ HMAP_FOR_EACH_WITH_HASH(packet_f, struct packet_fields, hmap_node, hash_int(OXM_OF_VLAN_VID, 0), &packet->match_fields){ /* Do not match packets with a VLAN Tag */ if (*matchv == OFPVID_NONE && !OXM_HASMASK(f->header)) return false; ret = true; } if ((*matchv == OFPVID_PRESENT) & (OXM_HASMASK(f->header))){ uint16_t *maskv = (uint16_t*) f->value + 2; if (*maskv == OFPVID_PRESENT && !ret ) return false; } } /* Loop through the match fields */ HMAP_FOR_EACH(f, struct ofl_match_tlv, hmap_node, &flow_match->match_fields){ /* Check if the field is present in the packet */ HMAP_FOR_EACH_WITH_HASH(packet_f, struct packet_fields, hmap_node, hash_int(f->header, 0), &packet->match_fields){ int field_len = OXM_LENGTH(f->header); bool has_mask = OXM_HASMASK(f->header); ret = true; switch (field_len){ case (sizeof(uint8_t)):{ if (has_mask){ if (pkt_mask8(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (matches_8(f->value, packet_f->value) == 0){ return false; } break; } case (sizeof(uint16_t)):{ if (has_mask){ if (pkt_mask16(f->value,f->value+ field_len, packet_f->value) == 0){ return false; } } else { if (pkt_match_16(f->value, packet_f->value) == 0){ return false; } } break; } case (sizeof(uint32_t)):{ if (has_mask){ if (f->header == OXM_OF_IPV4_DST || f->header == OXM_OF_IPV4_SRC ||f->header == OXM_OF_ARP_SPA || f->header == OXM_OF_ARP_TPA){ if (matches_mask32(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (pkt_mask32(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (f->header == OXM_OF_IPV4_DST || f->header == OXM_OF_IPV4_SRC ||f->header == OXM_OF_ARP_SPA || f->header == OXM_OF_ARP_TPA){ if (matches_32(f->value, packet_f->value) == 0){ return false; } } else if (pkt_match_32(f->value, packet_f->value) == 0){ return false; } break; } case (ETH_ADDR_LEN):{ if (has_mask){ if (eth_mask(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (eth_match(f->value, packet_f->value) == 0){ return false; } break; } case (sizeof(uint64_t)):{ if (has_mask) { if (pkt_mask64(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (matches_64(f->value, packet_f->value) == 0){ return false; } break; } case (16):{ if (has_mask){ if (ipv6_mask(f->value,f->value + field_len, packet_f->value) == 0){ return false; } } else if (ipv6_match(f->value, packet_f->value) == 0){ return false; } break; } } } if (!ret) return ret; else ret = false; } return true; }