/*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "openflow/openflow.h"
#include "openvswitch/datapath-protocol.h"
#include "packets.h"
-
+#include "unaligned.h"
#include "vlog.h"
-#define THIS_MODULE VLM_flow
+#include "xtoxll.h"
+
+VLOG_DEFINE_THIS_MODULE(flow)
static struct arp_eth_header *
pull_arp(struct ofpbuf *packet)
}
static struct tcp_header *
-pull_tcp(struct ofpbuf *packet)
+pull_tcp(struct ofpbuf *packet)
{
if (packet->size >= TCP_HEADER_LEN) {
struct tcp_header *tcp = packet->data;
}
static struct udp_header *
-pull_udp(struct ofpbuf *packet)
+pull_udp(struct ofpbuf *packet)
{
return ofpbuf_try_pull(packet, UDP_HEADER_LEN);
}
static struct icmp_header *
-pull_icmp(struct ofpbuf *packet)
+pull_icmp(struct ofpbuf *packet)
{
return ofpbuf_try_pull(packet, ICMP_HEADER_LEN);
}
-static struct eth_header *
-pull_eth(struct ofpbuf *packet)
+static void
+parse_vlan(struct ofpbuf *b, flow_t *flow)
{
- return ofpbuf_try_pull(packet, ETH_HEADER_LEN);
+ struct qtag_prefix {
+ uint16_t eth_type; /* ETH_TYPE_VLAN */
+ uint16_t tci;
+ };
+
+ if (b->size >= sizeof(struct qtag_prefix) + sizeof(uint16_t)) {
+ struct qtag_prefix *qp = ofpbuf_pull(b, sizeof *qp);
+ flow->dl_vlan = qp->tci & htons(VLAN_VID_MASK);
+ flow->dl_vlan_pcp = (ntohs(qp->tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
+ }
}
-static struct vlan_header *
-pull_vlan(struct ofpbuf *packet)
+static uint16_t
+parse_ethertype(struct ofpbuf *b)
{
- return ofpbuf_try_pull(packet, VLAN_HEADER_LEN);
+ struct llc_snap_header *llc;
+ uint16_t proto;
+
+ proto = *(uint16_t *) ofpbuf_pull(b, sizeof proto);
+ if (ntohs(proto) >= ODP_DL_TYPE_ETH2_CUTOFF) {
+ return proto;
+ }
+
+ if (b->size < sizeof *llc) {
+ return htons(ODP_DL_TYPE_NOT_ETH_TYPE);
+ }
+
+ llc = b->data;
+ if (llc->llc.llc_dsap != LLC_DSAP_SNAP
+ || llc->llc.llc_ssap != LLC_SSAP_SNAP
+ || llc->llc.llc_cntl != LLC_CNTL_SNAP
+ || memcmp(llc->snap.snap_org, SNAP_ORG_ETHERNET,
+ sizeof llc->snap.snap_org)) {
+ return htons(ODP_DL_TYPE_NOT_ETH_TYPE);
+ }
+
+ ofpbuf_pull(b, sizeof *llc);
+ return llc->snap.snap_type;
}
-/* Returns 1 if 'packet' is an IP fragment, 0 otherwise. */
+/* 'tun_id' is in network byte order, while 'in_port' is in host byte order.
+ * These byte orders are the same as they are in struct odp_flow_key.
+ *
+ * Initializes packet header pointers as follows:
+ *
+ * - packet->l2 to the start of the Ethernet header.
+ *
+ * - packet->l3 to just past the Ethernet header, or just past the
+ * vlan_header if one is present, to the first byte of the payload of the
+ * Ethernet frame.
+ *
+ * - packet->l4 to just past the IPv4 header, if one is present and has a
+ * correct length, and otherwise NULL.
+ *
+ * - packet->l7 to just past the TCP or UDP or ICMP header, if one is
+ * present and has a correct length, and otherwise NULL.
+ */
int
-flow_extract(struct ofpbuf *packet, uint16_t in_port, flow_t *flow)
+flow_extract(struct ofpbuf *packet, uint32_t tun_id, uint16_t in_port,
+ flow_t *flow)
{
struct ofpbuf b = *packet;
struct eth_header *eth;
COVERAGE_INC(flow_extract);
memset(flow, 0, sizeof *flow);
- flow->dl_vlan = htons(OFP_VLAN_NONE);
+ flow->tun_id = tun_id;
flow->in_port = in_port;
+ flow->dl_vlan = htons(OFP_VLAN_NONE);
packet->l2 = b.data;
packet->l3 = NULL;
packet->l4 = NULL;
packet->l7 = NULL;
- eth = pull_eth(&b);
- if (eth) {
- if (ntohs(eth->eth_type) >= OFP_DL_TYPE_ETH2_CUTOFF) {
- /* This is an Ethernet II frame */
- flow->dl_type = eth->eth_type;
- } else {
- /* This is an 802.2 frame */
- struct llc_header *llc = ofpbuf_at(&b, 0, sizeof *llc);
- struct snap_header *snap = ofpbuf_at(&b, sizeof *llc,
- sizeof *snap);
- if (llc == NULL) {
- return 0;
- }
- if (snap
- && llc->llc_dsap == LLC_DSAP_SNAP
- && llc->llc_ssap == LLC_SSAP_SNAP
- && llc->llc_cntl == LLC_CNTL_SNAP
- && !memcmp(snap->snap_org, SNAP_ORG_ETHERNET,
- sizeof snap->snap_org)) {
- flow->dl_type = snap->snap_type;
- ofpbuf_pull(&b, LLC_SNAP_HEADER_LEN);
- } else {
- flow->dl_type = htons(OFP_DL_TYPE_NOT_ETH_TYPE);
- ofpbuf_pull(&b, sizeof(struct llc_header));
- }
- }
+ if (b.size < sizeof *eth) {
+ return 0;
+ }
- /* Check for a VLAN tag */
- if (flow->dl_type == htons(ETH_TYPE_VLAN)) {
- struct vlan_header *vh = pull_vlan(&b);
- if (vh) {
- flow->dl_type = vh->vlan_next_type;
- flow->dl_vlan = vh->vlan_tci & htons(VLAN_VID_MASK);
- }
- }
- memcpy(flow->dl_src, eth->eth_src, ETH_ADDR_LEN);
- memcpy(flow->dl_dst, eth->eth_dst, ETH_ADDR_LEN);
-
- packet->l3 = b.data;
- if (flow->dl_type == htons(ETH_TYPE_IP)) {
- const struct ip_header *nh = pull_ip(&b);
- if (nh) {
- flow->nw_src = nh->ip_src;
- flow->nw_dst = nh->ip_dst;
- flow->nw_proto = nh->ip_proto;
- packet->l4 = b.data;
- if (!IP_IS_FRAGMENT(nh->ip_frag_off)) {
- if (flow->nw_proto == IP_TYPE_TCP) {
- const struct tcp_header *tcp = pull_tcp(&b);
- if (tcp) {
- flow->tp_src = tcp->tcp_src;
- flow->tp_dst = tcp->tcp_dst;
- packet->l7 = b.data;
- } else {
- /* Avoid tricking other code into thinking that
- * this packet has an L4 header. */
- flow->nw_proto = 0;
- }
- } else if (flow->nw_proto == IP_TYPE_UDP) {
- const struct udp_header *udp = pull_udp(&b);
- if (udp) {
- flow->tp_src = udp->udp_src;
- flow->tp_dst = udp->udp_dst;
- packet->l7 = b.data;
- } else {
- /* Avoid tricking other code into thinking that
- * this packet has an L4 header. */
- flow->nw_proto = 0;
- }
- } else if (flow->nw_proto == IP_TYPE_ICMP) {
- const struct icmp_header *icmp = pull_icmp(&b);
- if (icmp) {
- flow->icmp_type = htons(icmp->icmp_type);
- flow->icmp_code = htons(icmp->icmp_code);
- packet->l7 = b.data;
- } else {
- /* Avoid tricking other code into thinking that
- * this packet has an L4 header. */
- flow->nw_proto = 0;
- }
+ /* Link layer. */
+ eth = b.data;
+ memcpy(flow->dl_src, eth->eth_src, ETH_ADDR_LEN);
+ memcpy(flow->dl_dst, eth->eth_dst, ETH_ADDR_LEN);
+
+ /* dl_type, dl_vlan, dl_vlan_pcp. */
+ ofpbuf_pull(&b, ETH_ADDR_LEN * 2);
+ if (eth->eth_type == htons(ETH_TYPE_VLAN)) {
+ parse_vlan(&b, flow);
+ }
+ flow->dl_type = parse_ethertype(&b);
+
+ /* Network layer. */
+ packet->l3 = b.data;
+ if (flow->dl_type == htons(ETH_TYPE_IP)) {
+ const struct ip_header *nh = pull_ip(&b);
+ if (nh) {
+ flow->nw_src = get_unaligned_u32(&nh->ip_src);
+ flow->nw_dst = get_unaligned_u32(&nh->ip_dst);
+ flow->nw_tos = nh->ip_tos & IP_DSCP_MASK;
+ flow->nw_proto = nh->ip_proto;
+ packet->l4 = b.data;
+ if (!IP_IS_FRAGMENT(nh->ip_frag_off)) {
+ if (flow->nw_proto == IP_TYPE_TCP) {
+ const struct tcp_header *tcp = pull_tcp(&b);
+ if (tcp) {
+ flow->tp_src = tcp->tcp_src;
+ flow->tp_dst = tcp->tcp_dst;
+ packet->l7 = b.data;
+ }
+ } else if (flow->nw_proto == IP_TYPE_UDP) {
+ const struct udp_header *udp = pull_udp(&b);
+ if (udp) {
+ flow->tp_src = udp->udp_src;
+ flow->tp_dst = udp->udp_dst;
+ packet->l7 = b.data;
+ }
+ } else if (flow->nw_proto == IP_TYPE_ICMP) {
+ const struct icmp_header *icmp = pull_icmp(&b);
+ if (icmp) {
+ flow->icmp_type = htons(icmp->icmp_type);
+ flow->icmp_code = htons(icmp->icmp_code);
+ packet->l7 = b.data;
}
- } else {
- retval = 1;
}
+ } else {
+ retval = 1;
+ }
+ }
+ } else if (flow->dl_type == htons(ETH_TYPE_ARP)) {
+ const struct arp_eth_header *arp = pull_arp(&b);
+ if (arp && arp->ar_hrd == htons(1)
+ && arp->ar_pro == htons(ETH_TYPE_IP)
+ && arp->ar_hln == ETH_ADDR_LEN
+ && arp->ar_pln == 4) {
+ /* We only match on the lower 8 bits of the opcode. */
+ if (ntohs(arp->ar_op) <= 0xff) {
+ flow->nw_proto = ntohs(arp->ar_op);
}
- } else if (flow->dl_type == htons(ETH_TYPE_ARP)) {
- const struct arp_eth_header *arp = pull_arp(&b);
- if (arp && arp->ar_hrd == htons(1)
- && arp->ar_pro == htons(ETH_TYPE_IP)
- && arp->ar_hln == ETH_ADDR_LEN
- && arp->ar_pln == 4) {
- /* We only match on the lower 8 bits of the opcode. */
- if (ntohs(arp->ar_op) <= 0xff) {
- flow->nw_proto = ntohs(arp->ar_op);
- }
- if ((flow->nw_proto == ARP_OP_REQUEST)
- || (flow->nw_proto == ARP_OP_REPLY)) {
- flow->nw_src = arp->ar_spa;
- flow->nw_dst = arp->ar_tpa;
- }
+ if ((flow->nw_proto == ARP_OP_REQUEST)
+ || (flow->nw_proto == ARP_OP_REPLY)) {
+ flow->nw_src = arp->ar_spa;
+ flow->nw_dst = arp->ar_tpa;
}
}
}
* arguments must have been initialized through a call to flow_extract().
*/
void
-flow_extract_stats(const flow_t *flow, struct ofpbuf *packet,
+flow_extract_stats(const flow_t *flow, struct ofpbuf *packet,
struct odp_flow_stats *stats)
{
memset(stats, '\0', sizeof(*stats));
if ((flow->dl_type == htons(ETH_TYPE_IP)) && packet->l4) {
- struct ip_header *ip = packet->l3;
- stats->ip_tos = ip->ip_tos;
if ((flow->nw_proto == IP_TYPE_TCP) && packet->l7) {
struct tcp_header *tcp = packet->l4;
stats->tcp_flags = TCP_FLAGS(tcp->tcp_ctl);
stats->n_packets = 1;
}
-/* The Open vSwitch datapath supports matching on ARP payloads, which
- * OpenFlow does not. This function is identical to 'flow_to_match',
- * but does not hide the datapath's ability to match on ARP. */
+/* Extract 'flow' with 'wildcards' into the OpenFlow match structure
+ * 'match'. */
void
-flow_to_ovs_match(const flow_t *flow, uint32_t wildcards,
- struct ofp_match *match)
+flow_to_match(const flow_t *flow, uint32_t wildcards, bool tun_id_from_cookie,
+ struct ofp_match *match)
{
+ if (!tun_id_from_cookie) {
+ wildcards &= OFPFW_ALL;
+ }
match->wildcards = htonl(wildcards);
+
match->in_port = htons(flow->in_port == ODPP_LOCAL ? OFPP_LOCAL
: flow->in_port);
match->dl_vlan = flow->dl_vlan;
+ match->dl_vlan_pcp = flow->dl_vlan_pcp;
memcpy(match->dl_src, flow->dl_src, ETH_ADDR_LEN);
memcpy(match->dl_dst, flow->dl_dst, ETH_ADDR_LEN);
match->dl_type = flow->dl_type;
match->nw_src = flow->nw_src;
match->nw_dst = flow->nw_dst;
+ match->nw_tos = flow->nw_tos;
match->nw_proto = flow->nw_proto;
match->tp_src = flow->tp_src;
match->tp_dst = flow->tp_dst;
- match->pad = 0;
+ memset(match->pad1, '\0', sizeof match->pad1);
+ memset(match->pad2, '\0', sizeof match->pad2);
}
-/* Extract 'flow' with 'wildcards' into the OpenFlow match structure
- * 'match'. */
void
-flow_to_match(const flow_t *flow, uint32_t wildcards, struct ofp_match *match)
+flow_from_match(const struct ofp_match *match, bool tun_id_from_cookie,
+ uint64_t cookie, flow_t *flow, uint32_t *flow_wildcards)
{
- flow_to_ovs_match(flow, wildcards, match);
-
- /* The datapath supports matching on an ARP's opcode and IP addresses,
- * but OpenFlow does not. We wildcard and zero out the appropriate
- * fields so that OpenFlow is unaware of our trickery. */
- if (flow->dl_type == htons(ETH_TYPE_ARP)) {
- wildcards |= (OFPFW_NW_PROTO | OFPFW_NW_SRC_ALL | OFPFW_NW_DST_ALL);
- match->nw_src = 0;
- match->nw_dst = 0;
- match->nw_proto = 0;
- }
- match->wildcards = htonl(wildcards);
-}
-
-
-void
-flow_from_match(flow_t *flow, uint32_t *wildcards,
- const struct ofp_match *match)
-{
- if (wildcards) {
- *wildcards = ntohl(match->wildcards);
- }
- /* The datapath supports matching on an ARP's opcode and IP addresses,
- * but OpenFlow does not. In case the controller hasn't, we need to
- * set the appropriate wildcard bits so that we're externally
- * OpenFlow-compliant. */
- if (match->dl_type == htons(ETH_TYPE_ARP)) {
- *wildcards |= (OFPFW_NW_PROTO | OFPFW_NW_SRC_ALL | OFPFW_NW_DST_ALL);
- }
+ uint32_t wildcards = ntohl(match->wildcards);
flow->nw_src = match->nw_src;
flow->nw_dst = match->nw_dst;
+ if (tun_id_from_cookie && !(wildcards & NXFW_TUN_ID)) {
+ flow->tun_id = htonl(ntohll(cookie) >> 32);
+ } else {
+ wildcards |= NXFW_TUN_ID;
+ flow->tun_id = 0;
+ }
flow->in_port = (match->in_port == htons(OFPP_LOCAL) ? ODPP_LOCAL
: ntohs(match->in_port));
flow->dl_vlan = match->dl_vlan;
+ flow->dl_vlan_pcp = match->dl_vlan_pcp;
flow->dl_type = match->dl_type;
flow->tp_src = match->tp_src;
flow->tp_dst = match->tp_dst;
memcpy(flow->dl_src, match->dl_src, ETH_ADDR_LEN);
memcpy(flow->dl_dst, match->dl_dst, ETH_ADDR_LEN);
+ flow->nw_tos = match->nw_tos;
flow->nw_proto = match->nw_proto;
- flow->reserved = 0;
+ memset(flow->reserved, 0, sizeof flow->reserved);
+
+ if (flow_wildcards) {
+ *flow_wildcards = wildcards;
+ }
}
char *
void
flow_format(struct ds *ds, const flow_t *flow)
{
- ds_put_format(ds, "port%04x:vlan%d mac"ETH_ADDR_FMT"->"ETH_ADDR_FMT" "
- "type%04x proto%"PRId8" ip"IP_FMT"->"IP_FMT" port%d->%d",
- flow->in_port, ntohs(flow->dl_vlan),
- ETH_ADDR_ARGS(flow->dl_src), ETH_ADDR_ARGS(flow->dl_dst),
- ntohs(flow->dl_type), flow->nw_proto,
- IP_ARGS(&flow->nw_src), IP_ARGS(&flow->nw_dst),
- ntohs(flow->tp_src), ntohs(flow->tp_dst));
+ ds_put_format(ds, "tunnel%08"PRIx32":in_port%04"PRIx16
+ ":vlan%"PRIu16":pcp%"PRIu8
+ " mac"ETH_ADDR_FMT"->"ETH_ADDR_FMT
+ " type%04"PRIx16
+ " proto%"PRIu8
+ " tos%"PRIu8
+ " ip"IP_FMT"->"IP_FMT
+ " port%"PRIu16"->%"PRIu16,
+ ntohl(flow->tun_id),
+ flow->in_port,
+ ntohs(flow->dl_vlan),
+ flow->dl_vlan_pcp,
+ ETH_ADDR_ARGS(flow->dl_src),
+ ETH_ADDR_ARGS(flow->dl_dst),
+ ntohs(flow->dl_type),
+ flow->nw_proto,
+ flow->nw_tos,
+ IP_ARGS(&flow->nw_src),
+ IP_ARGS(&flow->nw_dst),
+ ntohs(flow->tp_src),
+ ntohs(flow->tp_dst));
}
void
-flow_print(FILE *stream, const flow_t *flow)
+flow_print(FILE *stream, const flow_t *flow)
{
char *s = flow_to_string(flow);
fputs(s, stream);
git://git.onelab.eu / sliver-openvswitch.git / blobdiff