/* Perform name match against the schema. Result is stored in
* match_type. */
void
cnode_schema_match(struct cnode *schema, char *name,
enum match_type *match_type) {
switch (schema->type) {
case CNODE_TYPE_KEYWORD:
keyword_match(name, schema->name, match_type);
break;
case CNODE_TYPE_WORD:
word_match(name, match_type);
break;
case CNODE_TYPE_IPV4:
ipv4_match(name, match_type);
break;
case CNODE_TYPE_IPV4_PREFIX:
ipv4_prefix_match(name, match_type);
break;
case CNODE_TYPE_IPV6:
ipv6_match(name, match_type);
break;
case CNODE_TYPE_IPV6_PREFIX:
ipv6_prefix_match(name, match_type);
break;
case CNODE_TYPE_MAC:
mac_address_match(name, match_type);
break;
case CNODE_TYPE_RANGE:
range_match(name, schema, match_type);
break;
default:
*match_type = NONE_MATCH;
break;
}
}
bool
match_std_nonstrict(struct ofl_match *a, struct ofl_match *b) {
struct ofl_match_tlv *flow_mod_match;
struct ofl_match_tlv *flow_entry_match;
bool ret = false;
/*Matches all flows */
if(!a->header.length )
return true;
/* Loop through the match fields */
HMAP_FOR_EACH(flow_mod_match, struct ofl_match_tlv, hmap_node, &a->match_fields){
/* Check if the field is present in the flow entry */
HMAP_FOR_EACH_WITH_HASH(flow_entry_match, struct ofl_match_tlv, hmap_node, hash_int(flow_mod_match->header, 0), &b->match_fields){
int field_len = OXM_LENGTH(flow_mod_match->header);
bool has_mask;
/* Check if both fields have or not a mask */
if ( (OXM_HASMASK(flow_mod_match->header) && !OXM_HASMASK(flow_entry_match->header))
|| (!OXM_HASMASK(flow_mod_match->header) && OXM_HASMASK(flow_entry_match->header))){
return false;
}
ret = true;
has_mask = OXM_HASMASK(flow_mod_match->header);
switch (field_len){
case (sizeof(uint8_t)):{
if (has_mask){
if (nonstrict_mask8(flow_mod_match->value, flow_entry_match->value + field_len, flow_entry_match->value,flow_entry_match->value + field_len) == 0){
return false;
}
}
else
if (matches_8(flow_mod_match->value, flow_entry_match->value) == 0){
return false;
}
break;
}
case (sizeof(uint16_t)):{
if (has_mask){
if (nonstrict_mask16(flow_mod_match->value,flow_entry_match->value + field_len, flow_entry_match->value,flow_entry_match->value + field_len) == 0){
return false;
}
}
else
if (matches_16(flow_mod_match->value, flow_entry_match->value) == 0){
return false;
}
break;
}
case (sizeof(uint32_t)):{
if (has_mask){
if (nonstrict_mask32(flow_mod_match->value,flow_entry_match->value + field_len, flow_entry_match->value,flow_entry_match->value + field_len) ){
return false;
}
}
else
if (matches_32(flow_mod_match->value, flow_entry_match->value) == 0){
return false;
}
break;
}
case (ETH_ADDR_LEN):{
if (has_mask){
if (nonstrict_ethaddr(flow_mod_match->value,flow_entry_match->value + field_len, flow_entry_match->value,flow_entry_match->value + field_len) == 0){
return false;
}
}
else
if (eth_match(flow_mod_match->value, flow_entry_match->value) == 0){
return false;
}
break;
}
case (sizeof(uint64_t)):{
if (has_mask) {
if (nonstrict_mask64(flow_mod_match->value,flow_entry_match->value + field_len, flow_entry_match->value,flow_entry_match->value + field_len) == 0){
return false;
}
}
else
if (matches_64(flow_mod_match->value, flow_entry_match->value) == 0){
return false;
}
break;
}
case (16):{
if (has_mask){
if (nonstrict_ipv6(flow_mod_match->value,flow_entry_match->value + field_len, flow_entry_match->value,flow_entry_match->value + field_len)== 0){
return false;
}
}
else
if (ipv6_match(flow_mod_match->value, flow_entry_match->value) == 0){
return false;
}
break;
}
}
}
if (!ret)
return ret;
else ret = false;
}
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;
}
/* 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;
}
struct cnode *
cnode_match(struct cnode *cnode, char *name) {
uint32_t i;
struct cnode *child;
enum match_type type;
if (cnode == NULL) {
return NULL;
}
for (i = 0; i < vector_max(cnode->v); i++) {
if ((child = vector_slot(cnode->v, i)) != NULL) {
switch (child->type) {
case CNODE_TYPE_KEYWORD:
if (strcmp(child->name, name) == 0) {
return child;
}
break;
case CNODE_TYPE_WORD:
return child;
break;
case CNODE_TYPE_IPV4:
ipv4_match(name, &type);
if (type == IPV4_MATCH) {
return child;
}
break;
case CNODE_TYPE_IPV4_PREFIX:
ipv4_prefix_match(name, &type);
if (type == IPV4_PREFIX_MATCH) {
return child;
}
break;
case CNODE_TYPE_IPV6:
ipv6_match(name, &type);
if (type == IPV6_MATCH) {
return child;
}
break;
case CNODE_TYPE_IPV6_PREFIX:
ipv6_prefix_match(name, &type);
if (type == IPV6_PREFIX_MATCH) {
return child;
}
break;
case CNODE_TYPE_MAC:
mac_address_match(name, &type);
if (type == MAC_ADDRESS_MATCH) {
return child;
}
break;
case CNODE_TYPE_RANGE:
range_match(name, child, &type);
if (type == RANGE_MATCH) {
return child;
}
break;
default:
break;
}
}
}
return NULL;
}
