#include <string.h>
#include "byte-order.h"
#include "coverage.h"
-#include "dpif.h"
#include "dynamic-string.h"
#include "hash.h"
#include "ofpbuf.h"
#include "openflow/openflow.h"
-#include "openvswitch/datapath-protocol.h"
#include "packets.h"
#include "unaligned.h"
#include "vlog.h"
return retval;
}
-/* Extracts the flow stats for a packet. The 'flow' and 'packet'
- * arguments must have been initialized through a call to flow_extract().
- */
+/* For every bit of a field that is wildcarded in 'wildcards', sets the
+ * corresponding bit in 'flow' to zero. */
void
-flow_extract_stats(const struct flow *flow, struct ofpbuf *packet,
- struct dpif_flow_stats *stats)
+flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards)
{
- memset(stats, 0, sizeof(*stats));
+ const flow_wildcards_t wc = wildcards->wildcards;
+ int i;
- if ((flow->dl_type == htons(ETH_TYPE_IP)) && packet->l4) {
- if ((flow->nw_proto == IPPROTO_TCP) && packet->l7) {
- struct tcp_header *tcp = packet->l4;
- stats->tcp_flags = TCP_FLAGS(tcp->tcp_ctl);
- }
- }
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 1);
- stats->n_bytes = packet->size;
- stats->n_packets = 1;
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ flow->regs[i] &= wildcards->reg_masks[i];
+ }
+ flow->tun_id &= wildcards->tun_id_mask;
+ flow->nw_src &= wildcards->nw_src_mask;
+ flow->nw_dst &= wildcards->nw_dst_mask;
+ if (wc & FWW_IN_PORT) {
+ flow->in_port = 0;
+ }
+ flow->vlan_tci &= wildcards->vlan_tci_mask;
+ if (wc & FWW_DL_TYPE) {
+ flow->dl_type = 0;
+ }
+ if (wc & FWW_TP_SRC) {
+ flow->tp_src = 0;
+ }
+ if (wc & FWW_TP_DST) {
+ flow->tp_dst = 0;
+ }
+ if (wc & FWW_DL_SRC) {
+ memset(flow->dl_src, 0, sizeof flow->dl_src);
+ }
+ if (wc & FWW_DL_DST) {
+ flow->dl_dst[0] &= 0x01;
+ memset(&flow->dl_dst[1], 0, 5);
+ }
+ if (wc & FWW_ETH_MCAST) {
+ flow->dl_dst[0] &= 0xfe;
+ }
+ if (wc & FWW_NW_PROTO) {
+ flow->nw_proto = 0;
+ }
+ if (wc & FWW_NW_TOS) {
+ flow->nw_tos = 0;
+ }
+ if (wc & FWW_ARP_SHA) {
+ memset(flow->arp_sha, 0, sizeof flow->arp_sha);
+ }
+ if (wc & FWW_ARP_THA) {
+ memset(flow->arp_tha, 0, sizeof flow->arp_tha);
+ }
+ flow->ipv6_src = ipv6_addr_bitand(&flow->ipv6_src,
+ &wildcards->ipv6_src_mask);
+ flow->ipv6_dst = ipv6_addr_bitand(&flow->ipv6_dst,
+ &wildcards->ipv6_dst_mask);
+ if (wc & FWW_ND_TARGET) {
+ memset(&flow->nd_target, 0, sizeof flow->nd_target);
+ }
}
char *
print_ipv6_addr(ds, &flow->ipv6_src);
ds_put_cstr(ds, "->");
print_ipv6_addr(ds, &flow->ipv6_dst);
-
+
} else {
ds_put_format(ds, " proto%"PRIu8
" tos%"PRIu8
{
int i;
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 1);
+
if (wc->wildcards
|| wc->tun_id_mask != htonll(UINT64_MAX)
|| wc->nw_src_mask != htonl(UINT32_MAX)
return true;
}
+/* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or
+ * fields. */
+bool
+flow_wildcards_is_catchall(const struct flow_wildcards *wc)
+{
+ int i;
+
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 1);
+
+ if (wc->wildcards != FWW_ALL
+ || wc->tun_id_mask != htonll(0)
+ || wc->nw_src_mask != htonl(0)
+ || wc->nw_dst_mask != htonl(0)
+ || wc->vlan_tci_mask != htons(0)
+ || !ipv6_mask_is_any(&wc->ipv6_src_mask)
+ || !ipv6_mask_is_any(&wc->ipv6_dst_mask)) {
+ return false;
+ }
+
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ if (wc->reg_masks[i] != 0) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
/* Initializes 'dst' as the combination of wildcards in 'src1' and 'src2'.
* That is, a bit or a field is wildcarded in 'dst' if it is wildcarded in
* 'src1' or 'src2' or both. */
|| a->tun_id_mask != b->tun_id_mask
|| a->nw_src_mask != b->nw_src_mask
|| a->nw_dst_mask != b->nw_dst_mask
- || a->vlan_tci_mask != b->vlan_tci_mask
+ || a->vlan_tci_mask != b->vlan_tci_mask
|| !ipv6_addr_equals(&a->ipv6_src_mask, &b->ipv6_src_mask)
|| !ipv6_addr_equals(&a->ipv6_dst_mask, &b->ipv6_dst_mask)) {
return false;
}
return hash_bytes(&fields, sizeof fields, basis);
}
+
+/* Hashes the portions of 'flow' designated by 'fields'. */
+uint32_t
+flow_hash_fields(const struct flow *flow, enum nx_hash_fields fields,
+ uint16_t basis)
+{
+ switch (fields) {
+
+ case NX_HASH_FIELDS_ETH_SRC:
+ return hash_bytes(flow->dl_src, sizeof flow->dl_src, basis);
+
+ case NX_HASH_FIELDS_SYMMETRIC_L4:
+ return flow_hash_symmetric_l4(flow, basis);
+ }
+
+ NOT_REACHED();
+}
+
+/* Returns a string representation of 'fields'. */
+const char *
+flow_hash_fields_to_str(enum nx_hash_fields fields)
+{
+ switch (fields) {
+ case NX_HASH_FIELDS_ETH_SRC: return "eth_src";
+ case NX_HASH_FIELDS_SYMMETRIC_L4: return "symmetric_l4";
+ default: return "<unknown>";
+ }
+}
+
+/* Returns true if the value of 'fields' is supported. Otherwise false. */
+bool
+flow_hash_fields_valid(enum nx_hash_fields fields)
+{
+ return fields == NX_HASH_FIELDS_ETH_SRC
+ || fields == NX_HASH_FIELDS_SYMMETRIC_L4;
+}
+
+/* Puts into 'b' a packet that flow_extract() would parse as having the given
+ * 'flow'.
+ *
+ * (This is useful only for testing, obviously, and the packet isn't really
+ * valid. It hasn't got any checksums filled in, for one, and lots of fields
+ * are just zeroed.) */
+void
+flow_compose(struct ofpbuf *b, const struct flow *flow)
+{
+ eth_compose(b, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0);
+ if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) {
+ struct eth_header *eth = b->l2;
+ eth->eth_type = htons(b->size);
+ return;
+ }
+
+ if (flow->vlan_tci & htons(VLAN_CFI)) {
+ eth_push_vlan(b, flow->vlan_tci & ~htons(VLAN_CFI));
+ }
+
+ if (flow->dl_type == htons(ETH_TYPE_IP)) {
+ struct ip_header *ip;
+
+ b->l3 = ip = ofpbuf_put_zeros(b, sizeof *ip);
+ ip->ip_ihl_ver = IP_IHL_VER(5, 4);
+ ip->ip_tos = flow->nw_tos;
+ ip->ip_proto = flow->nw_proto;
+ ip->ip_src = flow->nw_src;
+ ip->ip_dst = flow->nw_dst;
+
+ if (flow->nw_proto == IPPROTO_TCP) {
+ struct tcp_header *tcp;
+
+ b->l4 = tcp = ofpbuf_put_zeros(b, sizeof *tcp);
+ tcp->tcp_src = flow->tp_src;
+ tcp->tcp_dst = flow->tp_dst;
+ } else if (flow->nw_proto == IPPROTO_UDP) {
+ struct udp_header *udp;
+
+ b->l4 = udp = ofpbuf_put_zeros(b, sizeof *udp);
+ udp->udp_src = flow->tp_src;
+ udp->udp_dst = flow->tp_dst;
+ } else if (flow->nw_proto == IPPROTO_ICMP) {
+ struct icmp_header *icmp;
+
+ b->l4 = icmp = ofpbuf_put_zeros(b, sizeof *icmp);
+ icmp->icmp_type = ntohs(flow->tp_src);
+ icmp->icmp_code = ntohs(flow->tp_dst);
+ }
+ } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
+ /* XXX */
+ } else if (flow->dl_type == htons(ETH_TYPE_ARP)) {
+ struct arp_eth_header *arp;
+
+ b->l3 = arp = ofpbuf_put_zeros(b, sizeof *arp);
+ arp->ar_hrd = htons(1);
+ arp->ar_pro = htons(ETH_TYPE_IP);
+ arp->ar_hln = ETH_ADDR_LEN;
+ arp->ar_pln = 4;
+ arp->ar_op = htons(flow->nw_proto);
+
+ if (flow->nw_proto == ARP_OP_REQUEST ||
+ flow->nw_proto == ARP_OP_REPLY) {
+ arp->ar_spa = flow->nw_src;
+ arp->ar_tpa = flow->nw_dst;
+ memcpy(arp->ar_sha, flow->arp_sha, ETH_ADDR_LEN);
+ memcpy(arp->ar_tha, flow->arp_tha, ETH_ADDR_LEN);
+ }
+ }
+}