Example #1
0
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;

}
Example #2
0
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){ 
        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_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;
                    }
            }
            }
        }
         if (!ret)
            return ret;
         else ret = false;      
    }

    return true;

}