/*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <config.h>
#include "ofp-print.h"
+#include <errno.h>
#include <inttypes.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
#include <stdlib.h>
+#include "autopath.h"
+#include "bundle.h"
+#include "byte-order.h"
+#include "classifier.h"
+#include "dynamic-string.h"
+#include "learn.h"
+#include "meta-flow.h"
+#include "multipath.h"
+#include "netdev.h"
+#include "nx-match.h"
+#include "ofp-actions.h"
+#include "ofp-errors.h"
+#include "ofp-msgs.h"
#include "ofp-util.h"
#include "ofpbuf.h"
#include "packets.h"
#include "random.h"
+#include "unaligned.h"
+#include "type-props.h"
#include "vlog.h"
-#include "xtoxll.h"
-VLOG_DEFINE_THIS_MODULE(ofp_util)
+VLOG_DEFINE_THIS_MODULE(ofp_util);
/* Rate limit for OpenFlow message parse errors. These always indicate a bug
* in the peer and so there's not much point in showing a lot of them. */
static struct vlog_rate_limit bad_ofmsg_rl = VLOG_RATE_LIMIT_INIT(1, 5);
-/* XXX we should really use consecutive xids to avoid probabilistic
- * failures. */
-static inline uint32_t
-alloc_xid(void)
+/* Given the wildcard bit count in the least-significant 6 of 'wcbits', returns
+ * an IP netmask with a 1 in each bit that must match and a 0 in each bit that
+ * is wildcarded.
+ *
+ * The bits in 'wcbits' are in the format used in enum ofp_flow_wildcards: 0
+ * is exact match, 1 ignores the LSB, 2 ignores the 2 least-significant bits,
+ * ..., 32 and higher wildcard the entire field. This is the *opposite* of the
+ * usual convention where e.g. /24 indicates that 8 bits (not 24 bits) are
+ * wildcarded. */
+ovs_be32
+ofputil_wcbits_to_netmask(int wcbits)
+{
+ wcbits &= 0x3f;
+ return wcbits < 32 ? htonl(~((1u << wcbits) - 1)) : 0;
+}
+
+/* Given the IP netmask 'netmask', returns the number of bits of the IP address
+ * that it wildcards, that is, the number of 0-bits in 'netmask', a number
+ * between 0 and 32 inclusive.
+ *
+ * If 'netmask' is not a CIDR netmask (see ip_is_cidr()), the return value will
+ * still be in the valid range but isn't otherwise meaningful. */
+int
+ofputil_netmask_to_wcbits(ovs_be32 netmask)
+{
+ return 32 - ip_count_cidr_bits(netmask);
+}
+
+/* Converts the OpenFlow 1.0 wildcards in 'ofpfw' (OFPFW10_*) into a
+ * flow_wildcards in 'wc' for use in struct match. It is the caller's
+ * responsibility to handle the special case where the flow match's dl_vlan is
+ * set to OFP_VLAN_NONE. */
+void
+ofputil_wildcard_from_ofpfw10(uint32_t ofpfw, struct flow_wildcards *wc)
+{
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
+
+ /* Initialize most of wc. */
+ flow_wildcards_init_catchall(wc);
+
+ if (!(ofpfw & OFPFW10_IN_PORT)) {
+ wc->masks.in_port = UINT16_MAX;
+ }
+
+ if (!(ofpfw & OFPFW10_NW_TOS)) {
+ wc->masks.nw_tos |= IP_DSCP_MASK;
+ }
+
+ if (!(ofpfw & OFPFW10_NW_PROTO)) {
+ wc->masks.nw_proto = UINT8_MAX;
+ }
+ wc->masks.nw_src = ofputil_wcbits_to_netmask(ofpfw
+ >> OFPFW10_NW_SRC_SHIFT);
+ wc->masks.nw_dst = ofputil_wcbits_to_netmask(ofpfw
+ >> OFPFW10_NW_DST_SHIFT);
+
+ if (!(ofpfw & OFPFW10_TP_SRC)) {
+ wc->masks.tp_src = htons(UINT16_MAX);
+ }
+ if (!(ofpfw & OFPFW10_TP_DST)) {
+ wc->masks.tp_dst = htons(UINT16_MAX);
+ }
+
+ if (!(ofpfw & OFPFW10_DL_SRC)) {
+ memset(wc->masks.dl_src, 0xff, ETH_ADDR_LEN);
+ }
+ if (!(ofpfw & OFPFW10_DL_DST)) {
+ memset(wc->masks.dl_dst, 0xff, ETH_ADDR_LEN);
+ }
+ if (!(ofpfw & OFPFW10_DL_TYPE)) {
+ wc->masks.dl_type = htons(UINT16_MAX);
+ }
+
+ /* VLAN TCI mask. */
+ if (!(ofpfw & OFPFW10_DL_VLAN_PCP)) {
+ wc->masks.vlan_tci |= htons(VLAN_PCP_MASK | VLAN_CFI);
+ }
+ if (!(ofpfw & OFPFW10_DL_VLAN)) {
+ wc->masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI);
+ }
+}
+
+/* Converts the ofp10_match in 'ofmatch' into a struct match in 'match'. */
+void
+ofputil_match_from_ofp10_match(const struct ofp10_match *ofmatch,
+ struct match *match)
+{
+ uint32_t ofpfw = ntohl(ofmatch->wildcards) & OFPFW10_ALL;
+
+ /* Initialize match->wc. */
+ memset(match->flow.zeros, 0, sizeof match->flow.zeros);
+ ofputil_wildcard_from_ofpfw10(ofpfw, &match->wc);
+
+ /* Initialize most of match->flow. */
+ match->flow.nw_src = ofmatch->nw_src;
+ match->flow.nw_dst = ofmatch->nw_dst;
+ match->flow.in_port = ntohs(ofmatch->in_port);
+ match->flow.dl_type = ofputil_dl_type_from_openflow(ofmatch->dl_type);
+ match->flow.tp_src = ofmatch->tp_src;
+ match->flow.tp_dst = ofmatch->tp_dst;
+ memcpy(match->flow.dl_src, ofmatch->dl_src, ETH_ADDR_LEN);
+ memcpy(match->flow.dl_dst, ofmatch->dl_dst, ETH_ADDR_LEN);
+ match->flow.nw_tos = ofmatch->nw_tos & IP_DSCP_MASK;
+ match->flow.nw_proto = ofmatch->nw_proto;
+
+ /* Translate VLANs. */
+ if (!(ofpfw & OFPFW10_DL_VLAN) &&
+ ofmatch->dl_vlan == htons(OFP10_VLAN_NONE)) {
+ /* Match only packets without 802.1Q header.
+ *
+ * When OFPFW10_DL_VLAN_PCP is wildcarded, this is obviously correct.
+ *
+ * If OFPFW10_DL_VLAN_PCP is matched, the flow match is contradictory,
+ * because we can't have a specific PCP without an 802.1Q header.
+ * However, older versions of OVS treated this as matching packets
+ * withut an 802.1Q header, so we do here too. */
+ match->flow.vlan_tci = htons(0);
+ match->wc.masks.vlan_tci = htons(0xffff);
+ } else {
+ ovs_be16 vid, pcp, tci;
+
+ vid = ofmatch->dl_vlan & htons(VLAN_VID_MASK);
+ pcp = htons((ofmatch->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK);
+ tci = vid | pcp | htons(VLAN_CFI);
+ match->flow.vlan_tci = tci & match->wc.masks.vlan_tci;
+ }
+
+ /* Clean up. */
+ match_zero_wildcarded_fields(match);
+}
+
+/* Convert 'match' into the OpenFlow 1.0 match structure 'ofmatch'. */
+void
+ofputil_match_to_ofp10_match(const struct match *match,
+ struct ofp10_match *ofmatch)
+{
+ const struct flow_wildcards *wc = &match->wc;
+ uint32_t ofpfw;
+
+ /* Figure out most OpenFlow wildcards. */
+ ofpfw = 0;
+ if (!wc->masks.in_port) {
+ ofpfw |= OFPFW10_IN_PORT;
+ }
+ if (!wc->masks.dl_type) {
+ ofpfw |= OFPFW10_DL_TYPE;
+ }
+ if (!wc->masks.nw_proto) {
+ ofpfw |= OFPFW10_NW_PROTO;
+ }
+ ofpfw |= (ofputil_netmask_to_wcbits(wc->masks.nw_src)
+ << OFPFW10_NW_SRC_SHIFT);
+ ofpfw |= (ofputil_netmask_to_wcbits(wc->masks.nw_dst)
+ << OFPFW10_NW_DST_SHIFT);
+ if (!(wc->masks.nw_tos & IP_DSCP_MASK)) {
+ ofpfw |= OFPFW10_NW_TOS;
+ }
+ if (!wc->masks.tp_src) {
+ ofpfw |= OFPFW10_TP_SRC;
+ }
+ if (!wc->masks.tp_dst) {
+ ofpfw |= OFPFW10_TP_DST;
+ }
+ if (eth_addr_is_zero(wc->masks.dl_src)) {
+ ofpfw |= OFPFW10_DL_SRC;
+ }
+ if (eth_addr_is_zero(wc->masks.dl_dst)) {
+ ofpfw |= OFPFW10_DL_DST;
+ }
+
+ /* Translate VLANs. */
+ ofmatch->dl_vlan = htons(0);
+ ofmatch->dl_vlan_pcp = 0;
+ if (match->wc.masks.vlan_tci == htons(0)) {
+ ofpfw |= OFPFW10_DL_VLAN | OFPFW10_DL_VLAN_PCP;
+ } else if (match->wc.masks.vlan_tci & htons(VLAN_CFI)
+ && !(match->flow.vlan_tci & htons(VLAN_CFI))) {
+ ofmatch->dl_vlan = htons(OFP10_VLAN_NONE);
+ ofpfw |= OFPFW10_DL_VLAN_PCP;
+ } else {
+ if (!(match->wc.masks.vlan_tci & htons(VLAN_VID_MASK))) {
+ ofpfw |= OFPFW10_DL_VLAN;
+ } else {
+ ofmatch->dl_vlan = htons(vlan_tci_to_vid(match->flow.vlan_tci));
+ }
+
+ if (!(match->wc.masks.vlan_tci & htons(VLAN_PCP_MASK))) {
+ ofpfw |= OFPFW10_DL_VLAN_PCP;
+ } else {
+ ofmatch->dl_vlan_pcp = vlan_tci_to_pcp(match->flow.vlan_tci);
+ }
+ }
+
+ /* Compose most of the match structure. */
+ ofmatch->wildcards = htonl(ofpfw);
+ ofmatch->in_port = htons(match->flow.in_port);
+ memcpy(ofmatch->dl_src, match->flow.dl_src, ETH_ADDR_LEN);
+ memcpy(ofmatch->dl_dst, match->flow.dl_dst, ETH_ADDR_LEN);
+ ofmatch->dl_type = ofputil_dl_type_to_openflow(match->flow.dl_type);
+ ofmatch->nw_src = match->flow.nw_src;
+ ofmatch->nw_dst = match->flow.nw_dst;
+ ofmatch->nw_tos = match->flow.nw_tos & IP_DSCP_MASK;
+ ofmatch->nw_proto = match->flow.nw_proto;
+ ofmatch->tp_src = match->flow.tp_src;
+ ofmatch->tp_dst = match->flow.tp_dst;
+ memset(ofmatch->pad1, '\0', sizeof ofmatch->pad1);
+ memset(ofmatch->pad2, '\0', sizeof ofmatch->pad2);
+}
+
+enum ofperr
+ofputil_pull_ofp11_match(struct ofpbuf *buf, struct match *match,
+ uint16_t *padded_match_len)
+{
+ struct ofp11_match_header *omh = buf->data;
+ uint16_t match_len;
+
+ if (buf->size < sizeof *omh) {
+ return OFPERR_OFPBMC_BAD_LEN;
+ }
+
+ match_len = ntohs(omh->length);
+
+ switch (ntohs(omh->type)) {
+ case OFPMT_STANDARD: {
+ struct ofp11_match *om;
+
+ if (match_len != sizeof *om || buf->size < sizeof *om) {
+ return OFPERR_OFPBMC_BAD_LEN;
+ }
+ om = ofpbuf_pull(buf, sizeof *om);
+ if (padded_match_len) {
+ *padded_match_len = match_len;
+ }
+ return ofputil_match_from_ofp11_match(om, match);
+ }
+
+ case OFPMT_OXM:
+ if (padded_match_len) {
+ *padded_match_len = ROUND_UP(match_len, 8);
+ }
+ return oxm_pull_match(buf, match);
+
+ default:
+ return OFPERR_OFPBMC_BAD_TYPE;
+ }
+}
+
+/* Converts the ofp11_match in 'match' into a struct match in 'match. Returns
+ * 0 if successful, otherwise an OFPERR_* value. */
+enum ofperr
+ofputil_match_from_ofp11_match(const struct ofp11_match *ofmatch,
+ struct match *match)
+{
+ uint16_t wc = ntohl(ofmatch->wildcards);
+ uint8_t dl_src_mask[ETH_ADDR_LEN];
+ uint8_t dl_dst_mask[ETH_ADDR_LEN];
+ bool ipv4, arp;
+ int i;
+
+ match_init_catchall(match);
+
+ if (!(wc & OFPFW11_IN_PORT)) {
+ uint16_t ofp_port;
+ enum ofperr error;
+
+ error = ofputil_port_from_ofp11(ofmatch->in_port, &ofp_port);
+ if (error) {
+ return OFPERR_OFPBMC_BAD_VALUE;
+ }
+ match_set_in_port(match, ofp_port);
+ }
+
+ for (i = 0; i < ETH_ADDR_LEN; i++) {
+ dl_src_mask[i] = ~ofmatch->dl_src_mask[i];
+ }
+ match_set_dl_src_masked(match, ofmatch->dl_src, dl_src_mask);
+
+ for (i = 0; i < ETH_ADDR_LEN; i++) {
+ dl_dst_mask[i] = ~ofmatch->dl_dst_mask[i];
+ }
+ match_set_dl_dst_masked(match, ofmatch->dl_dst, dl_dst_mask);
+
+ if (!(wc & OFPFW11_DL_VLAN)) {
+ if (ofmatch->dl_vlan == htons(OFPVID11_NONE)) {
+ /* Match only packets without a VLAN tag. */
+ match->flow.vlan_tci = htons(0);
+ match->wc.masks.vlan_tci = htons(UINT16_MAX);
+ } else {
+ if (ofmatch->dl_vlan == htons(OFPVID11_ANY)) {
+ /* Match any packet with a VLAN tag regardless of VID. */
+ match->flow.vlan_tci = htons(VLAN_CFI);
+ match->wc.masks.vlan_tci = htons(VLAN_CFI);
+ } else if (ntohs(ofmatch->dl_vlan) < 4096) {
+ /* Match only packets with the specified VLAN VID. */
+ match->flow.vlan_tci = htons(VLAN_CFI) | ofmatch->dl_vlan;
+ match->wc.masks.vlan_tci = htons(VLAN_CFI | VLAN_VID_MASK);
+ } else {
+ /* Invalid VID. */
+ return OFPERR_OFPBMC_BAD_VALUE;
+ }
+
+ if (!(wc & OFPFW11_DL_VLAN_PCP)) {
+ if (ofmatch->dl_vlan_pcp <= 7) {
+ match->flow.vlan_tci |= htons(ofmatch->dl_vlan_pcp
+ << VLAN_PCP_SHIFT);
+ match->wc.masks.vlan_tci |= htons(VLAN_PCP_MASK);
+ } else {
+ /* Invalid PCP. */
+ return OFPERR_OFPBMC_BAD_VALUE;
+ }
+ }
+ }
+ }
+
+ if (!(wc & OFPFW11_DL_TYPE)) {
+ match_set_dl_type(match,
+ ofputil_dl_type_from_openflow(ofmatch->dl_type));
+ }
+
+ ipv4 = match->flow.dl_type == htons(ETH_TYPE_IP);
+ arp = match->flow.dl_type == htons(ETH_TYPE_ARP);
+
+ if (ipv4 && !(wc & OFPFW11_NW_TOS)) {
+ if (ofmatch->nw_tos & ~IP_DSCP_MASK) {
+ /* Invalid TOS. */
+ return OFPERR_OFPBMC_BAD_VALUE;
+ }
+
+ match_set_nw_dscp(match, ofmatch->nw_tos);
+ }
+
+ if (ipv4 || arp) {
+ if (!(wc & OFPFW11_NW_PROTO)) {
+ match_set_nw_proto(match, ofmatch->nw_proto);
+ }
+ match_set_nw_src_masked(match, ofmatch->nw_src, ~ofmatch->nw_src_mask);
+ match_set_nw_dst_masked(match, ofmatch->nw_dst, ~ofmatch->nw_dst_mask);
+ }
+
+#define OFPFW11_TP_ALL (OFPFW11_TP_SRC | OFPFW11_TP_DST)
+ if (ipv4 && (wc & OFPFW11_TP_ALL) != OFPFW11_TP_ALL) {
+ switch (match->flow.nw_proto) {
+ case IPPROTO_ICMP:
+ /* "A.2.3 Flow Match Structures" in OF1.1 says:
+ *
+ * The tp_src and tp_dst fields will be ignored unless the
+ * network protocol specified is as TCP, UDP or SCTP.
+ *
+ * but I'm pretty sure we should support ICMP too, otherwise
+ * that's a regression from OF1.0. */
+ if (!(wc & OFPFW11_TP_SRC)) {
+ uint16_t icmp_type = ntohs(ofmatch->tp_src);
+ if (icmp_type < 0x100) {
+ match_set_icmp_type(match, icmp_type);
+ } else {
+ return OFPERR_OFPBMC_BAD_FIELD;
+ }
+ }
+ if (!(wc & OFPFW11_TP_DST)) {
+ uint16_t icmp_code = ntohs(ofmatch->tp_dst);
+ if (icmp_code < 0x100) {
+ match_set_icmp_code(match, icmp_code);
+ } else {
+ return OFPERR_OFPBMC_BAD_FIELD;
+ }
+ }
+ break;
+
+ case IPPROTO_TCP:
+ case IPPROTO_UDP:
+ if (!(wc & (OFPFW11_TP_SRC))) {
+ match_set_tp_src(match, ofmatch->tp_src);
+ }
+ if (!(wc & (OFPFW11_TP_DST))) {
+ match_set_tp_dst(match, ofmatch->tp_dst);
+ }
+ break;
+
+ case IPPROTO_SCTP:
+ /* We don't support SCTP and it seems that we should tell the
+ * controller, since OF1.1 implementations are supposed to. */
+ return OFPERR_OFPBMC_BAD_FIELD;
+
+ default:
+ /* OF1.1 says explicitly to ignore this. */
+ break;
+ }
+ }
+
+ if (match->flow.dl_type == htons(ETH_TYPE_MPLS) ||
+ match->flow.dl_type == htons(ETH_TYPE_MPLS_MCAST)) {
+ enum { OFPFW11_MPLS_ALL = OFPFW11_MPLS_LABEL | OFPFW11_MPLS_TC };
+
+ if ((wc & OFPFW11_MPLS_ALL) != OFPFW11_MPLS_ALL) {
+ /* MPLS not supported. */
+ return OFPERR_OFPBMC_BAD_TAG;
+ }
+ }
+
+ match_set_metadata_masked(match, ofmatch->metadata,
+ ~ofmatch->metadata_mask);
+
+ return 0;
+}
+
+/* Convert 'match' into the OpenFlow 1.1 match structure 'ofmatch'. */
+void
+ofputil_match_to_ofp11_match(const struct match *match,
+ struct ofp11_match *ofmatch)
+{
+ uint32_t wc = 0;
+ int i;
+
+ memset(ofmatch, 0, sizeof *ofmatch);
+ ofmatch->omh.type = htons(OFPMT_STANDARD);
+ ofmatch->omh.length = htons(OFPMT11_STANDARD_LENGTH);
+
+ if (!match->wc.masks.in_port) {
+ wc |= OFPFW11_IN_PORT;
+ } else {
+ ofmatch->in_port = ofputil_port_to_ofp11(match->flow.in_port);
+ }
+
+ memcpy(ofmatch->dl_src, match->flow.dl_src, ETH_ADDR_LEN);
+ for (i = 0; i < ETH_ADDR_LEN; i++) {
+ ofmatch->dl_src_mask[i] = ~match->wc.masks.dl_src[i];
+ }
+
+ memcpy(ofmatch->dl_dst, match->flow.dl_dst, ETH_ADDR_LEN);
+ for (i = 0; i < ETH_ADDR_LEN; i++) {
+ ofmatch->dl_dst_mask[i] = ~match->wc.masks.dl_dst[i];
+ }
+
+ if (match->wc.masks.vlan_tci == htons(0)) {
+ wc |= OFPFW11_DL_VLAN | OFPFW11_DL_VLAN_PCP;
+ } else if (match->wc.masks.vlan_tci & htons(VLAN_CFI)
+ && !(match->flow.vlan_tci & htons(VLAN_CFI))) {
+ ofmatch->dl_vlan = htons(OFPVID11_NONE);
+ wc |= OFPFW11_DL_VLAN_PCP;
+ } else {
+ if (!(match->wc.masks.vlan_tci & htons(VLAN_VID_MASK))) {
+ ofmatch->dl_vlan = htons(OFPVID11_ANY);
+ } else {
+ ofmatch->dl_vlan = htons(vlan_tci_to_vid(match->flow.vlan_tci));
+ }
+
+ if (!(match->wc.masks.vlan_tci & htons(VLAN_PCP_MASK))) {
+ wc |= OFPFW11_DL_VLAN_PCP;
+ } else {
+ ofmatch->dl_vlan_pcp = vlan_tci_to_pcp(match->flow.vlan_tci);
+ }
+ }
+
+ if (!match->wc.masks.dl_type) {
+ wc |= OFPFW11_DL_TYPE;
+ } else {
+ ofmatch->dl_type = ofputil_dl_type_to_openflow(match->flow.dl_type);
+ }
+
+ if (!(match->wc.masks.nw_tos & IP_DSCP_MASK)) {
+ wc |= OFPFW11_NW_TOS;
+ } else {
+ ofmatch->nw_tos = match->flow.nw_tos & IP_DSCP_MASK;
+ }
+
+ if (!match->wc.masks.nw_proto) {
+ wc |= OFPFW11_NW_PROTO;
+ } else {
+ ofmatch->nw_proto = match->flow.nw_proto;
+ }
+
+ ofmatch->nw_src = match->flow.nw_src;
+ ofmatch->nw_src_mask = ~match->wc.masks.nw_src;
+ ofmatch->nw_dst = match->flow.nw_dst;
+ ofmatch->nw_dst_mask = ~match->wc.masks.nw_dst;
+
+ if (!match->wc.masks.tp_src) {
+ wc |= OFPFW11_TP_SRC;
+ } else {
+ ofmatch->tp_src = match->flow.tp_src;
+ }
+
+ if (!match->wc.masks.tp_dst) {
+ wc |= OFPFW11_TP_DST;
+ } else {
+ ofmatch->tp_dst = match->flow.tp_dst;
+ }
+
+ /* MPLS not supported. */
+ wc |= OFPFW11_MPLS_LABEL;
+ wc |= OFPFW11_MPLS_TC;
+
+ ofmatch->metadata = match->flow.metadata;
+ ofmatch->metadata_mask = ~match->wc.masks.metadata;
+
+ ofmatch->wildcards = htonl(wc);
+}
+
+/* Given a 'dl_type' value in the format used in struct flow, returns the
+ * corresponding 'dl_type' value for use in an ofp10_match or ofp11_match
+ * structure. */
+ovs_be16
+ofputil_dl_type_to_openflow(ovs_be16 flow_dl_type)
+{
+ return (flow_dl_type == htons(FLOW_DL_TYPE_NONE)
+ ? htons(OFP_DL_TYPE_NOT_ETH_TYPE)
+ : flow_dl_type);
+}
+
+/* Given a 'dl_type' value in the format used in an ofp10_match or ofp11_match
+ * structure, returns the corresponding 'dl_type' value for use in struct
+ * flow. */
+ovs_be16
+ofputil_dl_type_from_openflow(ovs_be16 ofp_dl_type)
+{
+ return (ofp_dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE)
+ ? htons(FLOW_DL_TYPE_NONE)
+ : ofp_dl_type);
+}
+\f
+/* Protocols. */
+
+struct proto_abbrev {
+ enum ofputil_protocol protocol;
+ const char *name;
+};
+
+/* Most users really don't care about some of the differences between
+ * protocols. These abbreviations help with that. */
+static const struct proto_abbrev proto_abbrevs[] = {
+ { OFPUTIL_P_ANY, "any" },
+ { OFPUTIL_P_OF10_ANY, "OpenFlow10" },
+ { OFPUTIL_P_NXM_ANY, "NXM" },
+};
+#define N_PROTO_ABBREVS ARRAY_SIZE(proto_abbrevs)
+
+enum ofputil_protocol ofputil_flow_dump_protocols[] = {
+ OFPUTIL_P_NXM,
+ OFPUTIL_P_OF10,
+};
+size_t ofputil_n_flow_dump_protocols = ARRAY_SIZE(ofputil_flow_dump_protocols);
+
+/* Returns the ofputil_protocol that is initially in effect on an OpenFlow
+ * connection that has negotiated the given 'version'. 'version' should
+ * normally be an 8-bit OpenFlow version identifier (e.g. 0x01 for OpenFlow
+ * 1.0, 0x02 for OpenFlow 1.1). Returns 0 if 'version' is not supported or
+ * outside the valid range. */
+enum ofputil_protocol
+ofputil_protocol_from_ofp_version(enum ofp_version version)
+{
+ switch (version) {
+ case OFP10_VERSION:
+ return OFPUTIL_P_OF10;
+ case OFP12_VERSION:
+ return OFPUTIL_P_OF12;
+ case OFP11_VERSION:
+ default:
+ return 0;
+ }
+}
+
+/* Returns the OpenFlow protocol version number (e.g. OFP10_VERSION,
+ * OFP11_VERSION or OFP12_VERSION) that corresponds to 'protocol'. */
+enum ofp_version
+ofputil_protocol_to_ofp_version(enum ofputil_protocol protocol)
+{
+ switch (protocol) {
+ case OFPUTIL_P_OF10:
+ case OFPUTIL_P_OF10_TID:
+ case OFPUTIL_P_NXM:
+ case OFPUTIL_P_NXM_TID:
+ return OFP10_VERSION;
+ case OFPUTIL_P_OF12:
+ return OFP12_VERSION;
+ }
+
+ NOT_REACHED();
+}
+
+/* Returns true if 'protocol' is a single OFPUTIL_P_* value, false
+ * otherwise. */
+bool
+ofputil_protocol_is_valid(enum ofputil_protocol protocol)
{
- return random_uint32();
+ return protocol & OFPUTIL_P_ANY && is_pow2(protocol);
}
-/* Allocates and stores in '*bufferp' a new ofpbuf with a size of
- * 'openflow_len', starting with an OpenFlow header with the given 'type' and
- * an arbitrary transaction id. Allocated bytes beyond the header, if any, are
- * zeroed.
+/* Returns the equivalent of 'protocol' with the Nicira flow_mod_table_id
+ * extension turned on or off if 'enable' is true or false, respectively.
*
- * The caller is responsible for freeing '*bufferp' when it is no longer
- * needed.
+ * This extension is only useful for protocols whose "standard" version does
+ * not allow specific tables to be modified. In particular, this is true of
+ * OpenFlow 1.0. In later versions of OpenFlow, a flow_mod request always
+ * specifies a table ID and so there is no need for such an extension. When
+ * 'protocol' is such a protocol that doesn't need a flow_mod_table_id
+ * extension, this function just returns its 'protocol' argument unchanged
+ * regardless of the value of 'enable'. */
+enum ofputil_protocol
+ofputil_protocol_set_tid(enum ofputil_protocol protocol, bool enable)
+{
+ switch (protocol) {
+ case OFPUTIL_P_OF10:
+ case OFPUTIL_P_OF10_TID:
+ return enable ? OFPUTIL_P_OF10_TID : OFPUTIL_P_OF10;
+
+ case OFPUTIL_P_NXM:
+ case OFPUTIL_P_NXM_TID:
+ return enable ? OFPUTIL_P_NXM_TID : OFPUTIL_P_NXM;
+
+ case OFPUTIL_P_OF12:
+ return OFPUTIL_P_OF12;
+
+ default:
+ NOT_REACHED();
+ }
+}
+
+/* Returns the "base" version of 'protocol'. That is, if 'protocol' includes
+ * some extension to a standard protocol version, the return value is the
+ * standard version of that protocol without any extension. If 'protocol' is a
+ * standard protocol version, returns 'protocol' unchanged. */
+enum ofputil_protocol
+ofputil_protocol_to_base(enum ofputil_protocol protocol)
+{
+ return ofputil_protocol_set_tid(protocol, false);
+}
+
+/* Returns 'new_base' with any extensions taken from 'cur'. */
+enum ofputil_protocol
+ofputil_protocol_set_base(enum ofputil_protocol cur,
+ enum ofputil_protocol new_base)
+{
+ bool tid = (cur & OFPUTIL_P_TID) != 0;
+
+ switch (new_base) {
+ case OFPUTIL_P_OF10:
+ case OFPUTIL_P_OF10_TID:
+ return ofputil_protocol_set_tid(OFPUTIL_P_OF10, tid);
+
+ case OFPUTIL_P_NXM:
+ case OFPUTIL_P_NXM_TID:
+ return ofputil_protocol_set_tid(OFPUTIL_P_NXM, tid);
+
+ case OFPUTIL_P_OF12:
+ return ofputil_protocol_set_tid(OFPUTIL_P_OF12, tid);
+
+ default:
+ NOT_REACHED();
+ }
+}
+
+/* Returns a string form of 'protocol', if a simple form exists (that is, if
+ * 'protocol' is either a single protocol or it is a combination of protocols
+ * that have a single abbreviation). Otherwise, returns NULL. */
+const char *
+ofputil_protocol_to_string(enum ofputil_protocol protocol)
+{
+ const struct proto_abbrev *p;
+
+ /* Use a "switch" statement for single-bit names so that we get a compiler
+ * warning if we forget any. */
+ switch (protocol) {
+ case OFPUTIL_P_NXM:
+ return "NXM-table_id";
+
+ case OFPUTIL_P_NXM_TID:
+ return "NXM+table_id";
+
+ case OFPUTIL_P_OF10:
+ return "OpenFlow10-table_id";
+
+ case OFPUTIL_P_OF10_TID:
+ return "OpenFlow10+table_id";
+
+ case OFPUTIL_P_OF12:
+ return NULL;
+ }
+
+ /* Check abbreviations. */
+ for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
+ if (protocol == p->protocol) {
+ return p->name;
+ }
+ }
+
+ return NULL;
+}
+
+/* Returns a string that represents 'protocols'. The return value might be a
+ * comma-separated list if 'protocols' doesn't have a simple name. The return
+ * value is "none" if 'protocols' is 0.
*
- * The OpenFlow header length is initially set to 'openflow_len'; if the
- * message is later extended, the length should be updated with
- * update_openflow_length() before sending.
+ * The caller must free the returned string (with free()). */
+char *
+ofputil_protocols_to_string(enum ofputil_protocol protocols)
+{
+ struct ds s;
+
+ assert(!(protocols & ~OFPUTIL_P_ANY));
+ if (protocols == 0) {
+ return xstrdup("none");
+ }
+
+ ds_init(&s);
+ while (protocols) {
+ const struct proto_abbrev *p;
+ int i;
+
+ if (s.length) {
+ ds_put_char(&s, ',');
+ }
+
+ for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
+ if ((protocols & p->protocol) == p->protocol) {
+ ds_put_cstr(&s, p->name);
+ protocols &= ~p->protocol;
+ goto match;
+ }
+ }
+
+ for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) {
+ enum ofputil_protocol bit = 1u << i;
+
+ if (protocols & bit) {
+ ds_put_cstr(&s, ofputil_protocol_to_string(bit));
+ protocols &= ~bit;
+ goto match;
+ }
+ }
+ NOT_REACHED();
+
+ match: ;
+ }
+ return ds_steal_cstr(&s);
+}
+
+static enum ofputil_protocol
+ofputil_protocol_from_string__(const char *s, size_t n)
+{
+ const struct proto_abbrev *p;
+ int i;
+
+ for (i = 0; i < CHAR_BIT * sizeof(enum ofputil_protocol); i++) {
+ enum ofputil_protocol bit = 1u << i;
+ const char *name = ofputil_protocol_to_string(bit);
+
+ if (name && n == strlen(name) && !strncasecmp(s, name, n)) {
+ return bit;
+ }
+ }
+
+ for (p = proto_abbrevs; p < &proto_abbrevs[N_PROTO_ABBREVS]; p++) {
+ if (n == strlen(p->name) && !strncasecmp(s, p->name, n)) {
+ return p->protocol;
+ }
+ }
+
+ return 0;
+}
+
+/* Returns the nonempty set of protocols represented by 's', which can be a
+ * single protocol name or abbreviation or a comma-separated list of them.
*
- * Returns the header. */
-void *
-make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **bufferp)
+ * Aborts the program with an error message if 's' is invalid. */
+enum ofputil_protocol
+ofputil_protocols_from_string(const char *s)
+{
+ const char *orig_s = s;
+ enum ofputil_protocol protocols;
+
+ protocols = 0;
+ while (*s) {
+ enum ofputil_protocol p;
+ size_t n;
+
+ n = strcspn(s, ",");
+ if (n == 0) {
+ s++;
+ continue;
+ }
+
+ p = ofputil_protocol_from_string__(s, n);
+ if (!p) {
+ ovs_fatal(0, "%.*s: unknown flow protocol", (int) n, s);
+ }
+ protocols |= p;
+
+ s += n;
+ }
+
+ if (!protocols) {
+ ovs_fatal(0, "%s: no flow protocol specified", orig_s);
+ }
+ return protocols;
+}
+
+bool
+ofputil_packet_in_format_is_valid(enum nx_packet_in_format packet_in_format)
+{
+ switch (packet_in_format) {
+ case NXPIF_OPENFLOW10:
+ case NXPIF_NXM:
+ return true;
+ }
+
+ return false;
+}
+
+const char *
+ofputil_packet_in_format_to_string(enum nx_packet_in_format packet_in_format)
+{
+ switch (packet_in_format) {
+ case NXPIF_OPENFLOW10:
+ return "openflow10";
+ case NXPIF_NXM:
+ return "nxm";
+ default:
+ NOT_REACHED();
+ }
+}
+
+int
+ofputil_packet_in_format_from_string(const char *s)
+{
+ return (!strcmp(s, "openflow10") ? NXPIF_OPENFLOW10
+ : !strcmp(s, "nxm") ? NXPIF_NXM
+ : -1);
+}
+
+static bool
+regs_fully_wildcarded(const struct flow_wildcards *wc)
+{
+ int i;
+
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ if (wc->masks.regs[i] != 0) {
+ return false;
+ }
+ }
+ return true;
+}
+
+/* Returns a bit-mask of ofputil_protocols that can be used for sending 'match'
+ * to a switch (e.g. to add or remove a flow). Only NXM can handle tunnel IDs,
+ * registers, or fixing the Ethernet multicast bit. Otherwise, it's better to
+ * use OpenFlow 1.0 protocol for backward compatibility. */
+enum ofputil_protocol
+ofputil_usable_protocols(const struct match *match)
+{
+ const struct flow_wildcards *wc = &match->wc;
+
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
+
+ /* NXM and OF1.1+ supports bitwise matching on ethernet addresses. */
+ if (!eth_mask_is_exact(wc->masks.dl_src)
+ && !eth_addr_is_zero(wc->masks.dl_src)) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+ if (!eth_mask_is_exact(wc->masks.dl_dst)
+ && !eth_addr_is_zero(wc->masks.dl_dst)) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* NXM and OF1.1+ support matching metadata. */
+ if (wc->masks.metadata != htonll(0)) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports matching ARP hardware addresses. */
+ if (!eth_addr_is_zero(wc->masks.arp_sha) ||
+ !eth_addr_is_zero(wc->masks.arp_tha)) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports matching IPv6 traffic. */
+ if (match->flow.dl_type == htons(ETH_TYPE_IPV6)) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports matching registers. */
+ if (!regs_fully_wildcarded(wc)) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports matching tun_id. */
+ if (wc->masks.tun_id != htonll(0)) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports matching fragments. */
+ if (wc->masks.nw_frag) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports matching IPv6 flow label. */
+ if (wc->masks.ipv6_label) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports matching IP ECN bits. */
+ if (wc->masks.nw_tos & IP_ECN_MASK) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports matching IP TTL/hop limit. */
+ if (wc->masks.nw_ttl) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports non-CIDR IPv4 address masks. */
+ if (!ip_is_cidr(wc->masks.nw_src) || !ip_is_cidr(wc->masks.nw_dst)) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Only NXM supports bitwise matching on transport port. */
+ if ((wc->masks.tp_src && wc->masks.tp_src != htons(UINT16_MAX)) ||
+ (wc->masks.tp_dst && wc->masks.tp_dst != htons(UINT16_MAX))) {
+ return OFPUTIL_P_NXM_ANY;
+ }
+
+ /* Other formats can express this rule. */
+ return OFPUTIL_P_ANY;
+}
+
+/* Returns an OpenFlow message that, sent on an OpenFlow connection whose
+ * protocol is 'current', at least partly transitions the protocol to 'want'.
+ * Stores in '*next' the protocol that will be in effect on the OpenFlow
+ * connection if the switch processes the returned message correctly. (If
+ * '*next != want' then the caller will have to iterate.)
+ *
+ * If 'current == want', returns NULL and stores 'current' in '*next'. */
+struct ofpbuf *
+ofputil_encode_set_protocol(enum ofputil_protocol current,
+ enum ofputil_protocol want,
+ enum ofputil_protocol *next)
+{
+ enum ofputil_protocol cur_base, want_base;
+ bool cur_tid, want_tid;
+
+ cur_base = ofputil_protocol_to_base(current);
+ want_base = ofputil_protocol_to_base(want);
+ if (cur_base != want_base) {
+ *next = ofputil_protocol_set_base(current, want_base);
+
+ switch (want_base) {
+ case OFPUTIL_P_NXM:
+ return ofputil_encode_nx_set_flow_format(NXFF_NXM);
+
+ case OFPUTIL_P_OF10:
+ return ofputil_encode_nx_set_flow_format(NXFF_OPENFLOW10);
+
+ case OFPUTIL_P_OF12:
+ return ofputil_encode_nx_set_flow_format(NXFF_OPENFLOW12);
+
+ case OFPUTIL_P_OF10_TID:
+ case OFPUTIL_P_NXM_TID:
+ NOT_REACHED();
+ }
+ }
+
+ cur_tid = (current & OFPUTIL_P_TID) != 0;
+ want_tid = (want & OFPUTIL_P_TID) != 0;
+ if (cur_tid != want_tid) {
+ *next = ofputil_protocol_set_tid(current, want_tid);
+ return ofputil_make_flow_mod_table_id(want_tid);
+ }
+
+ assert(current == want);
+
+ *next = current;
+ return NULL;
+}
+
+/* Returns an NXT_SET_FLOW_FORMAT message that can be used to set the flow
+ * format to 'nxff'. */
+struct ofpbuf *
+ofputil_encode_nx_set_flow_format(enum nx_flow_format nxff)
+{
+ struct nx_set_flow_format *sff;
+ struct ofpbuf *msg;
+
+ assert(ofputil_nx_flow_format_is_valid(nxff));
+
+ msg = ofpraw_alloc(OFPRAW_NXT_SET_FLOW_FORMAT, OFP10_VERSION, 0);
+ sff = ofpbuf_put_zeros(msg, sizeof *sff);
+ sff->format = htonl(nxff);
+
+ return msg;
+}
+
+/* Returns the base protocol if 'flow_format' is a valid NXFF_* value, false
+ * otherwise. */
+enum ofputil_protocol
+ofputil_nx_flow_format_to_protocol(enum nx_flow_format flow_format)
+{
+ switch (flow_format) {
+ case NXFF_OPENFLOW10:
+ return OFPUTIL_P_OF10;
+
+ case NXFF_NXM:
+ return OFPUTIL_P_NXM;
+
+ case NXFF_OPENFLOW12:
+ return OFPUTIL_P_OF12;
+
+ default:
+ return 0;
+ }
+}
+
+/* Returns true if 'flow_format' is a valid NXFF_* value, false otherwise. */
+bool
+ofputil_nx_flow_format_is_valid(enum nx_flow_format flow_format)
+{
+ return ofputil_nx_flow_format_to_protocol(flow_format) != 0;
+}
+
+/* Returns a string version of 'flow_format', which must be a valid NXFF_*
+ * value. */
+const char *
+ofputil_nx_flow_format_to_string(enum nx_flow_format flow_format)
+{
+ switch (flow_format) {
+ case NXFF_OPENFLOW10:
+ return "openflow10";
+ case NXFF_NXM:
+ return "nxm";
+ case NXFF_OPENFLOW12:
+ return "openflow12";
+ default:
+ NOT_REACHED();
+ }
+}
+
+struct ofpbuf *
+ofputil_make_set_packet_in_format(enum nx_packet_in_format packet_in_format)
+{
+ struct nx_set_packet_in_format *spif;
+ struct ofpbuf *msg;
+
+ msg = ofpraw_alloc(OFPRAW_NXT_SET_PACKET_IN_FORMAT, OFP10_VERSION, 0);
+ spif = ofpbuf_put_zeros(msg, sizeof *spif);
+ spif->format = htonl(packet_in_format);
+
+ return msg;
+}
+
+/* Returns an OpenFlow message that can be used to turn the flow_mod_table_id
+ * extension on or off (according to 'flow_mod_table_id'). */
+struct ofpbuf *
+ofputil_make_flow_mod_table_id(bool flow_mod_table_id)
+{
+ struct nx_flow_mod_table_id *nfmti;
+ struct ofpbuf *msg;
+
+ msg = ofpraw_alloc(OFPRAW_NXT_FLOW_MOD_TABLE_ID, OFP10_VERSION, 0);
+ nfmti = ofpbuf_put_zeros(msg, sizeof *nfmti);
+ nfmti->set = flow_mod_table_id;
+ return msg;
+}
+
+/* Converts an OFPT_FLOW_MOD or NXT_FLOW_MOD message 'oh' into an abstract
+ * flow_mod in 'fm'. Returns 0 if successful, otherwise an OpenFlow error
+ * code.
+ *
+ * Uses 'ofpacts' to store the abstract OFPACT_* version of 'oh''s actions.
+ * The caller must initialize 'ofpacts' and retains ownership of it.
+ * 'fm->ofpacts' will point into the 'ofpacts' buffer.
+ *
+ * Does not validate the flow_mod actions. The caller should do that, with
+ * ofpacts_check(). */
+enum ofperr
+ofputil_decode_flow_mod(struct ofputil_flow_mod *fm,
+ const struct ofp_header *oh,
+ enum ofputil_protocol protocol,
+ struct ofpbuf *ofpacts)
+{
+ uint16_t command;
+ struct ofpbuf b;
+ enum ofpraw raw;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ raw = ofpraw_pull_assert(&b);
+ if (raw == OFPRAW_OFPT11_FLOW_MOD) {
+ /* Standard OpenFlow 1.1 flow_mod. */
+ const struct ofp11_flow_mod *ofm;
+ enum ofperr error;
+
+ ofm = ofpbuf_pull(&b, sizeof *ofm);
+
+ error = ofputil_pull_ofp11_match(&b, &fm->match, NULL);
+ if (error) {
+ return error;
+ }
+
+ error = ofpacts_pull_openflow11_instructions(&b, b.size, ofpacts);
+ if (error) {
+ return error;
+ }
+
+ /* Translate the message. */
+ fm->priority = ntohs(ofm->priority);
+ if (ofm->command == OFPFC_ADD) {
+ fm->cookie = htonll(0);
+ fm->cookie_mask = htonll(0);
+ fm->new_cookie = ofm->cookie;
+ } else {
+ /* XXX */
+ fm->cookie = ofm->cookie;
+ fm->cookie_mask = ofm->cookie_mask;
+ fm->new_cookie = htonll(UINT64_MAX);
+ }
+ fm->command = ofm->command;
+ fm->table_id = ofm->table_id;
+ fm->idle_timeout = ntohs(ofm->idle_timeout);
+ fm->hard_timeout = ntohs(ofm->hard_timeout);
+ fm->buffer_id = ntohl(ofm->buffer_id);
+ error = ofputil_port_from_ofp11(ofm->out_port, &fm->out_port);
+ if (error) {
+ return error;
+ }
+ if (ofm->out_group != htonl(OFPG_ANY)) {
+ return OFPERR_OFPFMFC_UNKNOWN;
+ }
+ fm->flags = ntohs(ofm->flags);
+ } else {
+ if (raw == OFPRAW_OFPT10_FLOW_MOD) {
+ /* Standard OpenFlow 1.0 flow_mod. */
+ const struct ofp10_flow_mod *ofm;
+ enum ofperr error;
+
+ /* Get the ofp10_flow_mod. */
+ ofm = ofpbuf_pull(&b, sizeof *ofm);
+
+ /* Translate the rule. */
+ ofputil_match_from_ofp10_match(&ofm->match, &fm->match);
+ ofputil_normalize_match(&fm->match);
+
+ /* Now get the actions. */
+ error = ofpacts_pull_openflow10(&b, b.size, ofpacts);
+ if (error) {
+ return error;
+ }
+
+ /* OpenFlow 1.0 says that exact-match rules have to have the
+ * highest possible priority. */
+ fm->priority = (ofm->match.wildcards & htonl(OFPFW10_ALL)
+ ? ntohs(ofm->priority)
+ : UINT16_MAX);
+
+ /* Translate the message. */
+ command = ntohs(ofm->command);
+ fm->cookie = htonll(0);
+ fm->cookie_mask = htonll(0);
+ fm->new_cookie = ofm->cookie;
+ fm->idle_timeout = ntohs(ofm->idle_timeout);
+ fm->hard_timeout = ntohs(ofm->hard_timeout);
+ fm->buffer_id = ntohl(ofm->buffer_id);
+ fm->out_port = ntohs(ofm->out_port);
+ fm->flags = ntohs(ofm->flags);
+ } else if (raw == OFPRAW_NXT_FLOW_MOD) {
+ /* Nicira extended flow_mod. */
+ const struct nx_flow_mod *nfm;
+ enum ofperr error;
+
+ /* Dissect the message. */
+ nfm = ofpbuf_pull(&b, sizeof *nfm);
+ error = nx_pull_match(&b, ntohs(nfm->match_len),
+ &fm->match, &fm->cookie, &fm->cookie_mask);
+ if (error) {
+ return error;
+ }
+ error = ofpacts_pull_openflow10(&b, b.size, ofpacts);
+ if (error) {
+ return error;
+ }
+
+ /* Translate the message. */
+ command = ntohs(nfm->command);
+ if ((command & 0xff) == OFPFC_ADD && fm->cookie_mask) {
+ /* Flow additions may only set a new cookie, not match an
+ * existing cookie. */
+ return OFPERR_NXBRC_NXM_INVALID;
+ }
+ fm->priority = ntohs(nfm->priority);
+ fm->new_cookie = nfm->cookie;
+ fm->idle_timeout = ntohs(nfm->idle_timeout);
+ fm->hard_timeout = ntohs(nfm->hard_timeout);
+ fm->buffer_id = ntohl(nfm->buffer_id);
+ fm->out_port = ntohs(nfm->out_port);
+ fm->flags = ntohs(nfm->flags);
+ } else {
+ NOT_REACHED();
+ }
+
+ if (protocol & OFPUTIL_P_TID) {
+ fm->command = command & 0xff;
+ fm->table_id = command >> 8;
+ } else {
+ fm->command = command;
+ fm->table_id = 0xff;
+ }
+ }
+
+ fm->ofpacts = ofpacts->data;
+ fm->ofpacts_len = ofpacts->size;
+
+ return 0;
+}
+
+static ovs_be16
+ofputil_tid_command(const struct ofputil_flow_mod *fm,
+ enum ofputil_protocol protocol)
+{
+ return htons(protocol & OFPUTIL_P_TID
+ ? (fm->command & 0xff) | (fm->table_id << 8)
+ : fm->command);
+}
+
+/* Converts 'fm' into an OFPT_FLOW_MOD or NXT_FLOW_MOD message according to
+ * 'protocol' and returns the message. */
+struct ofpbuf *
+ofputil_encode_flow_mod(const struct ofputil_flow_mod *fm,
+ enum ofputil_protocol protocol)
+{
+ struct ofpbuf *msg;
+
+ switch (protocol) {
+ case OFPUTIL_P_OF12: {
+ struct ofp11_flow_mod *ofm;
+
+ msg = ofpraw_alloc(OFPRAW_OFPT11_FLOW_MOD, OFP12_VERSION,
+ NXM_TYPICAL_LEN + fm->ofpacts_len);
+ ofm = ofpbuf_put_zeros(msg, sizeof *ofm);
+ ofm->cookie = fm->new_cookie;
+ ofm->cookie_mask = fm->cookie_mask;
+ ofm->table_id = fm->table_id;
+ ofm->command = fm->command;
+ ofm->idle_timeout = htons(fm->idle_timeout);
+ ofm->hard_timeout = htons(fm->hard_timeout);
+ ofm->priority = htons(fm->priority);
+ ofm->buffer_id = htonl(fm->buffer_id);
+ ofm->out_port = ofputil_port_to_ofp11(fm->out_port);
+ ofm->out_group = htonl(OFPG11_ANY);
+ ofm->flags = htons(fm->flags);
+ oxm_put_match(msg, &fm->match);
+ ofpacts_put_openflow11_instructions(fm->ofpacts, fm->ofpacts_len, msg);
+ break;
+ }
+
+ case OFPUTIL_P_OF10:
+ case OFPUTIL_P_OF10_TID: {
+ struct ofp10_flow_mod *ofm;
+
+ msg = ofpraw_alloc(OFPRAW_OFPT10_FLOW_MOD, OFP10_VERSION,
+ fm->ofpacts_len);
+ ofm = ofpbuf_put_zeros(msg, sizeof *ofm);
+ ofputil_match_to_ofp10_match(&fm->match, &ofm->match);
+ ofm->cookie = fm->new_cookie;
+ ofm->command = ofputil_tid_command(fm, protocol);
+ ofm->idle_timeout = htons(fm->idle_timeout);
+ ofm->hard_timeout = htons(fm->hard_timeout);
+ ofm->priority = htons(fm->priority);
+ ofm->buffer_id = htonl(fm->buffer_id);
+ ofm->out_port = htons(fm->out_port);
+ ofm->flags = htons(fm->flags);
+ ofpacts_put_openflow10(fm->ofpacts, fm->ofpacts_len, msg);
+ break;
+ }
+
+ case OFPUTIL_P_NXM:
+ case OFPUTIL_P_NXM_TID: {
+ struct nx_flow_mod *nfm;
+ int match_len;
+
+ msg = ofpraw_alloc(OFPRAW_NXT_FLOW_MOD, OFP10_VERSION,
+ NXM_TYPICAL_LEN + fm->ofpacts_len);
+ nfm = ofpbuf_put_zeros(msg, sizeof *nfm);
+ nfm->command = ofputil_tid_command(fm, protocol);
+ nfm->cookie = fm->new_cookie;
+ match_len = nx_put_match(msg, &fm->match, fm->cookie, fm->cookie_mask);
+ nfm = msg->l3;
+ nfm->idle_timeout = htons(fm->idle_timeout);
+ nfm->hard_timeout = htons(fm->hard_timeout);
+ nfm->priority = htons(fm->priority);
+ nfm->buffer_id = htonl(fm->buffer_id);
+ nfm->out_port = htons(fm->out_port);
+ nfm->flags = htons(fm->flags);
+ nfm->match_len = htons(match_len);
+ ofpacts_put_openflow10(fm->ofpacts, fm->ofpacts_len, msg);
+ break;
+ }
+
+ default:
+ NOT_REACHED();
+ }
+
+ ofpmsg_update_length(msg);
+ return msg;
+}
+
+/* Returns a bitmask with a 1-bit for each protocol that could be used to
+ * send all of the 'n_fm's flow table modification requests in 'fms', and a
+ * 0-bit for each protocol that is inadequate.
+ *
+ * (The return value will have at least one 1-bit.) */
+enum ofputil_protocol
+ofputil_flow_mod_usable_protocols(const struct ofputil_flow_mod *fms,
+ size_t n_fms)
+{
+ enum ofputil_protocol usable_protocols;
+ size_t i;
+
+ usable_protocols = OFPUTIL_P_ANY;
+ for (i = 0; i < n_fms; i++) {
+ const struct ofputil_flow_mod *fm = &fms[i];
+
+ usable_protocols &= ofputil_usable_protocols(&fm->match);
+ if (fm->table_id != 0xff) {
+ usable_protocols &= OFPUTIL_P_TID;
+ }
+
+ /* Matching of the cookie is only supported through NXM. */
+ if (fm->cookie_mask != htonll(0)) {
+ usable_protocols &= OFPUTIL_P_NXM_ANY;
+ }
+ }
+ assert(usable_protocols);
+
+ return usable_protocols;
+}
+
+static enum ofperr
+ofputil_decode_ofpst10_flow_request(struct ofputil_flow_stats_request *fsr,
+ const struct ofp10_flow_stats_request *ofsr,
+ bool aggregate)
+{
+ fsr->aggregate = aggregate;
+ ofputil_match_from_ofp10_match(&ofsr->match, &fsr->match);
+ fsr->out_port = ntohs(ofsr->out_port);
+ fsr->table_id = ofsr->table_id;
+ fsr->cookie = fsr->cookie_mask = htonll(0);
+
+ return 0;
+}
+
+static enum ofperr
+ofputil_decode_ofpst11_flow_request(struct ofputil_flow_stats_request *fsr,
+ struct ofpbuf *b, bool aggregate)
+{
+ const struct ofp11_flow_stats_request *ofsr;
+ enum ofperr error;
+
+ ofsr = ofpbuf_pull(b, sizeof *ofsr);
+ fsr->aggregate = aggregate;
+ fsr->table_id = ofsr->table_id;
+ error = ofputil_port_from_ofp11(ofsr->out_port, &fsr->out_port);
+ if (error) {
+ return error;
+ }
+ if (ofsr->out_group != htonl(OFPG11_ANY)) {
+ return OFPERR_OFPFMFC_UNKNOWN;
+ }
+ fsr->cookie = ofsr->cookie;
+ fsr->cookie_mask = ofsr->cookie_mask;
+ error = ofputil_pull_ofp11_match(b, &fsr->match, NULL);
+ if (error) {
+ return error;
+ }
+
+ return 0;
+}
+
+static enum ofperr
+ofputil_decode_nxst_flow_request(struct ofputil_flow_stats_request *fsr,
+ struct ofpbuf *b, bool aggregate)
+{
+ const struct nx_flow_stats_request *nfsr;
+ enum ofperr error;
+
+ nfsr = ofpbuf_pull(b, sizeof *nfsr);
+ error = nx_pull_match(b, ntohs(nfsr->match_len), &fsr->match,
+ &fsr->cookie, &fsr->cookie_mask);
+ if (error) {
+ return error;
+ }
+ if (b->size) {
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ fsr->aggregate = aggregate;
+ fsr->out_port = ntohs(nfsr->out_port);
+ fsr->table_id = nfsr->table_id;
+
+ return 0;
+}
+
+/* Converts an OFPST_FLOW, OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE
+ * request 'oh', into an abstract flow_stats_request in 'fsr'. Returns 0 if
+ * successful, otherwise an OpenFlow error code. */
+enum ofperr
+ofputil_decode_flow_stats_request(struct ofputil_flow_stats_request *fsr,
+ const struct ofp_header *oh)
+{
+ enum ofpraw raw;
+ struct ofpbuf b;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ raw = ofpraw_pull_assert(&b);
+ switch ((int) raw) {
+ case OFPRAW_OFPST10_FLOW_REQUEST:
+ return ofputil_decode_ofpst10_flow_request(fsr, b.data, false);
+
+ case OFPRAW_OFPST10_AGGREGATE_REQUEST:
+ return ofputil_decode_ofpst10_flow_request(fsr, b.data, true);
+
+ case OFPRAW_OFPST11_FLOW_REQUEST:
+ return ofputil_decode_ofpst11_flow_request(fsr, &b, false);
+
+ case OFPRAW_OFPST11_AGGREGATE_REQUEST:
+ return ofputil_decode_ofpst11_flow_request(fsr, &b, true);
+
+ case OFPRAW_NXST_FLOW_REQUEST:
+ return ofputil_decode_nxst_flow_request(fsr, &b, false);
+
+ case OFPRAW_NXST_AGGREGATE_REQUEST:
+ return ofputil_decode_nxst_flow_request(fsr, &b, true);
+
+ default:
+ /* Hey, the caller lied. */
+ NOT_REACHED();
+ }
+}
+
+/* Converts abstract flow_stats_request 'fsr' into an OFPST_FLOW,
+ * OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE request 'oh' according to
+ * 'protocol', and returns the message. */
+struct ofpbuf *
+ofputil_encode_flow_stats_request(const struct ofputil_flow_stats_request *fsr,
+ enum ofputil_protocol protocol)
+{
+ struct ofpbuf *msg;
+ enum ofpraw raw;
+
+ switch (protocol) {
+ case OFPUTIL_P_OF12: {
+ struct ofp11_flow_stats_request *ofsr;
+
+ raw = (fsr->aggregate
+ ? OFPRAW_OFPST11_AGGREGATE_REQUEST
+ : OFPRAW_OFPST11_FLOW_REQUEST);
+ msg = ofpraw_alloc(raw, OFP12_VERSION, NXM_TYPICAL_LEN);
+ ofsr = ofpbuf_put_zeros(msg, sizeof *ofsr);
+ ofsr->table_id = fsr->table_id;
+ ofsr->out_port = ofputil_port_to_ofp11(fsr->out_port);
+ ofsr->out_group = htonl(OFPG11_ANY);
+ ofsr->cookie = fsr->cookie;
+ ofsr->cookie_mask = fsr->cookie_mask;
+ oxm_put_match(msg, &fsr->match);
+ break;
+ }
+
+ case OFPUTIL_P_OF10:
+ case OFPUTIL_P_OF10_TID: {
+ struct ofp10_flow_stats_request *ofsr;
+
+ raw = (fsr->aggregate
+ ? OFPRAW_OFPST10_AGGREGATE_REQUEST
+ : OFPRAW_OFPST10_FLOW_REQUEST);
+ msg = ofpraw_alloc(raw, OFP10_VERSION, 0);
+ ofsr = ofpbuf_put_zeros(msg, sizeof *ofsr);
+ ofputil_match_to_ofp10_match(&fsr->match, &ofsr->match);
+ ofsr->table_id = fsr->table_id;
+ ofsr->out_port = htons(fsr->out_port);
+ break;
+ }
+
+ case OFPUTIL_P_NXM:
+ case OFPUTIL_P_NXM_TID: {
+ struct nx_flow_stats_request *nfsr;
+ int match_len;
+
+ raw = (fsr->aggregate
+ ? OFPRAW_NXST_AGGREGATE_REQUEST
+ : OFPRAW_NXST_FLOW_REQUEST);
+ msg = ofpraw_alloc(raw, OFP10_VERSION, NXM_TYPICAL_LEN);
+ ofpbuf_put_zeros(msg, sizeof *nfsr);
+ match_len = nx_put_match(msg, &fsr->match,
+ fsr->cookie, fsr->cookie_mask);
+
+ nfsr = msg->l3;
+ nfsr->out_port = htons(fsr->out_port);
+ nfsr->match_len = htons(match_len);
+ nfsr->table_id = fsr->table_id;
+ break;
+ }
+
+ default:
+ NOT_REACHED();
+ }
+
+ return msg;
+}
+
+/* Returns a bitmask with a 1-bit for each protocol that could be used to
+ * accurately encode 'fsr', and a 0-bit for each protocol that is inadequate.
+ *
+ * (The return value will have at least one 1-bit.) */
+enum ofputil_protocol
+ofputil_flow_stats_request_usable_protocols(
+ const struct ofputil_flow_stats_request *fsr)
+{
+ enum ofputil_protocol usable_protocols;
+
+ usable_protocols = ofputil_usable_protocols(&fsr->match);
+ if (fsr->cookie_mask != htonll(0)) {
+ usable_protocols &= OFPUTIL_P_NXM_ANY;
+ }
+ return usable_protocols;
+}
+
+/* Converts an OFPST_FLOW or NXST_FLOW reply in 'msg' into an abstract
+ * ofputil_flow_stats in 'fs'.
+ *
+ * Multiple OFPST_FLOW or NXST_FLOW replies can be packed into a single
+ * OpenFlow message. Calling this function multiple times for a single 'msg'
+ * iterates through the replies. The caller must initially leave 'msg''s layer
+ * pointers null and not modify them between calls.
+ *
+ * Most switches don't send the values needed to populate fs->idle_age and
+ * fs->hard_age, so those members will usually be set to 0. If the switch from
+ * which 'msg' originated is known to implement NXT_FLOW_AGE, then pass
+ * 'flow_age_extension' as true so that the contents of 'msg' determine the
+ * 'idle_age' and 'hard_age' members in 'fs'.
+ *
+ * Uses 'ofpacts' to store the abstract OFPACT_* version of the flow stats
+ * reply's actions. The caller must initialize 'ofpacts' and retains ownership
+ * of it. 'fs->ofpacts' will point into the 'ofpacts' buffer.
+ *
+ * Returns 0 if successful, EOF if no replies were left in this 'msg',
+ * otherwise a positive errno value. */
+int
+ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *fs,
+ struct ofpbuf *msg,
+ bool flow_age_extension,
+ struct ofpbuf *ofpacts)
+{
+ enum ofperr error;
+ enum ofpraw raw;
+
+ error = (msg->l2
+ ? ofpraw_decode(&raw, msg->l2)
+ : ofpraw_pull(&raw, msg));
+ if (error) {
+ return error;
+ }
+
+ if (!msg->size) {
+ return EOF;
+ } else if (raw == OFPRAW_OFPST11_FLOW_REPLY) {
+ const struct ofp11_flow_stats *ofs;
+ size_t length;
+ uint16_t padded_match_len;
+
+ ofs = ofpbuf_try_pull(msg, sizeof *ofs);
+ if (!ofs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover "
+ "bytes at end", msg->size);
+ return EINVAL;
+ }
+
+ length = ntohs(ofs->length);
+ if (length < sizeof *ofs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid "
+ "length %zu", length);
+ return EINVAL;
+ }
+
+ if (ofputil_pull_ofp11_match(msg, &fs->match, &padded_match_len)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply bad match");
+ return EINVAL;
+ }
+
+ if (ofpacts_pull_openflow11_instructions(msg, length - sizeof *ofs -
+ padded_match_len, ofpacts)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply bad instructions");
+ return EINVAL;
+ }
+
+ fs->priority = ntohs(ofs->priority);
+ fs->table_id = ofs->table_id;
+ fs->duration_sec = ntohl(ofs->duration_sec);
+ fs->duration_nsec = ntohl(ofs->duration_nsec);
+ fs->idle_timeout = ntohs(ofs->idle_timeout);
+ fs->hard_timeout = ntohs(ofs->hard_timeout);
+ fs->idle_age = -1;
+ fs->hard_age = -1;
+ fs->cookie = ofs->cookie;
+ fs->packet_count = ntohll(ofs->packet_count);
+ fs->byte_count = ntohll(ofs->byte_count);
+ } else if (raw == OFPRAW_OFPST10_FLOW_REPLY) {
+ const struct ofp10_flow_stats *ofs;
+ size_t length;
+
+ ofs = ofpbuf_try_pull(msg, sizeof *ofs);
+ if (!ofs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply has %zu leftover "
+ "bytes at end", msg->size);
+ return EINVAL;
+ }
+
+ length = ntohs(ofs->length);
+ if (length < sizeof *ofs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply claims invalid "
+ "length %zu", length);
+ return EINVAL;
+ }
+
+ if (ofpacts_pull_openflow10(msg, length - sizeof *ofs, ofpacts)) {
+ return EINVAL;
+ }
+
+ fs->cookie = get_32aligned_be64(&ofs->cookie);
+ ofputil_match_from_ofp10_match(&ofs->match, &fs->match);
+ fs->priority = ntohs(ofs->priority);
+ fs->table_id = ofs->table_id;
+ fs->duration_sec = ntohl(ofs->duration_sec);
+ fs->duration_nsec = ntohl(ofs->duration_nsec);
+ fs->idle_timeout = ntohs(ofs->idle_timeout);
+ fs->hard_timeout = ntohs(ofs->hard_timeout);
+ fs->idle_age = -1;
+ fs->hard_age = -1;
+ fs->packet_count = ntohll(get_32aligned_be64(&ofs->packet_count));
+ fs->byte_count = ntohll(get_32aligned_be64(&ofs->byte_count));
+ } else if (raw == OFPRAW_NXST_FLOW_REPLY) {
+ const struct nx_flow_stats *nfs;
+ size_t match_len, actions_len, length;
+
+ nfs = ofpbuf_try_pull(msg, sizeof *nfs);
+ if (!nfs) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply has %zu leftover "
+ "bytes at end", msg->size);
+ return EINVAL;
+ }
+
+ length = ntohs(nfs->length);
+ match_len = ntohs(nfs->match_len);
+ if (length < sizeof *nfs + ROUND_UP(match_len, 8)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW reply with match_len=%zu "
+ "claims invalid length %zu", match_len, length);
+ return EINVAL;
+ }
+ if (nx_pull_match(msg, match_len, &fs->match, NULL, NULL)) {
+ return EINVAL;
+ }
+
+ actions_len = length - sizeof *nfs - ROUND_UP(match_len, 8);
+ if (ofpacts_pull_openflow10(msg, actions_len, ofpacts)) {
+ return EINVAL;
+ }
+
+ fs->cookie = nfs->cookie;
+ fs->table_id = nfs->table_id;
+ fs->duration_sec = ntohl(nfs->duration_sec);
+ fs->duration_nsec = ntohl(nfs->duration_nsec);
+ fs->priority = ntohs(nfs->priority);
+ fs->idle_timeout = ntohs(nfs->idle_timeout);
+ fs->hard_timeout = ntohs(nfs->hard_timeout);
+ fs->idle_age = -1;
+ fs->hard_age = -1;
+ if (flow_age_extension) {
+ if (nfs->idle_age) {
+ fs->idle_age = ntohs(nfs->idle_age) - 1;
+ }
+ if (nfs->hard_age) {
+ fs->hard_age = ntohs(nfs->hard_age) - 1;
+ }
+ }
+ fs->packet_count = ntohll(nfs->packet_count);
+ fs->byte_count = ntohll(nfs->byte_count);
+ } else {
+ NOT_REACHED();
+ }
+
+ fs->ofpacts = ofpacts->data;
+ fs->ofpacts_len = ofpacts->size;
+
+ return 0;
+}
+
+/* Returns 'count' unchanged except that UINT64_MAX becomes 0.
+ *
+ * We use this in situations where OVS internally uses UINT64_MAX to mean
+ * "value unknown" but OpenFlow 1.0 does not define any unknown value. */
+static uint64_t
+unknown_to_zero(uint64_t count)
+{
+ return count != UINT64_MAX ? count : 0;
+}
+
+/* Appends an OFPST_FLOW or NXST_FLOW reply that contains the data in 'fs' to
+ * those already present in the list of ofpbufs in 'replies'. 'replies' should
+ * have been initialized with ofputil_start_stats_reply(). */
+void
+ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *fs,
+ struct list *replies)
+{
+ struct ofpbuf *reply = ofpbuf_from_list(list_back(replies));
+ size_t start_ofs = reply->size;
+ enum ofpraw raw;
+
+ ofpraw_decode_partial(&raw, reply->data, reply->size);
+ if (raw == OFPRAW_OFPST11_FLOW_REPLY) {
+ struct ofp11_flow_stats *ofs;
+
+ ofpbuf_put_uninit(reply, sizeof *ofs);
+ oxm_put_match(reply, &fs->match);
+ ofpacts_put_openflow11_instructions(fs->ofpacts, fs->ofpacts_len,
+ reply);
+
+ ofs = ofpbuf_at_assert(reply, start_ofs, sizeof *ofs);
+ ofs->length = htons(reply->size - start_ofs);
+ ofs->table_id = fs->table_id;
+ ofs->pad = 0;
+ ofs->duration_sec = htonl(fs->duration_sec);
+ ofs->duration_nsec = htonl(fs->duration_nsec);
+ ofs->priority = htons(fs->priority);
+ ofs->idle_timeout = htons(fs->idle_timeout);
+ ofs->hard_timeout = htons(fs->hard_timeout);
+ memset(ofs->pad2, 0, sizeof ofs->pad2);
+ ofs->cookie = fs->cookie;
+ ofs->packet_count = htonll(unknown_to_zero(fs->packet_count));
+ ofs->byte_count = htonll(unknown_to_zero(fs->byte_count));
+ } else if (raw == OFPRAW_OFPST10_FLOW_REPLY) {
+ struct ofp10_flow_stats *ofs;
+
+ ofpbuf_put_uninit(reply, sizeof *ofs);
+ ofpacts_put_openflow10(fs->ofpacts, fs->ofpacts_len, reply);
+
+ ofs = ofpbuf_at_assert(reply, start_ofs, sizeof *ofs);
+ ofs->length = htons(reply->size - start_ofs);
+ ofs->table_id = fs->table_id;
+ ofs->pad = 0;
+ ofputil_match_to_ofp10_match(&fs->match, &ofs->match);
+ ofs->duration_sec = htonl(fs->duration_sec);
+ ofs->duration_nsec = htonl(fs->duration_nsec);
+ ofs->priority = htons(fs->priority);
+ ofs->idle_timeout = htons(fs->idle_timeout);
+ ofs->hard_timeout = htons(fs->hard_timeout);
+ memset(ofs->pad2, 0, sizeof ofs->pad2);
+ put_32aligned_be64(&ofs->cookie, fs->cookie);
+ put_32aligned_be64(&ofs->packet_count,
+ htonll(unknown_to_zero(fs->packet_count)));
+ put_32aligned_be64(&ofs->byte_count,
+ htonll(unknown_to_zero(fs->byte_count)));
+ } else if (raw == OFPRAW_NXST_FLOW_REPLY) {
+ struct nx_flow_stats *nfs;
+ int match_len;
+
+ ofpbuf_put_uninit(reply, sizeof *nfs);
+ match_len = nx_put_match(reply, &fs->match, 0, 0);
+ ofpacts_put_openflow10(fs->ofpacts, fs->ofpacts_len, reply);
+
+ nfs = ofpbuf_at_assert(reply, start_ofs, sizeof *nfs);
+ nfs->length = htons(reply->size - start_ofs);
+ nfs->table_id = fs->table_id;
+ nfs->pad = 0;
+ nfs->duration_sec = htonl(fs->duration_sec);
+ nfs->duration_nsec = htonl(fs->duration_nsec);
+ nfs->priority = htons(fs->priority);
+ nfs->idle_timeout = htons(fs->idle_timeout);
+ nfs->hard_timeout = htons(fs->hard_timeout);
+ nfs->idle_age = htons(fs->idle_age < 0 ? 0
+ : fs->idle_age < UINT16_MAX ? fs->idle_age + 1
+ : UINT16_MAX);
+ nfs->hard_age = htons(fs->hard_age < 0 ? 0
+ : fs->hard_age < UINT16_MAX ? fs->hard_age + 1
+ : UINT16_MAX);
+ nfs->match_len = htons(match_len);
+ nfs->cookie = fs->cookie;
+ nfs->packet_count = htonll(fs->packet_count);
+ nfs->byte_count = htonll(fs->byte_count);
+ } else {
+ NOT_REACHED();
+ }
+
+ ofpmp_postappend(replies, start_ofs);
+}
+
+/* Converts abstract ofputil_aggregate_stats 'stats' into an OFPST_AGGREGATE or
+ * NXST_AGGREGATE reply matching 'request', and returns the message. */
+struct ofpbuf *
+ofputil_encode_aggregate_stats_reply(
+ const struct ofputil_aggregate_stats *stats,
+ const struct ofp_header *request)
+{
+ struct ofp_aggregate_stats_reply *asr;
+ uint64_t packet_count;
+ uint64_t byte_count;
+ struct ofpbuf *msg;
+ enum ofpraw raw;
+
+ ofpraw_decode(&raw, request);
+ if (raw == OFPRAW_OFPST10_AGGREGATE_REQUEST) {
+ packet_count = unknown_to_zero(stats->packet_count);
+ byte_count = unknown_to_zero(stats->byte_count);
+ } else {
+ packet_count = stats->packet_count;
+ byte_count = stats->byte_count;
+ }
+
+ msg = ofpraw_alloc_stats_reply(request, 0);
+ asr = ofpbuf_put_zeros(msg, sizeof *asr);
+ put_32aligned_be64(&asr->packet_count, htonll(packet_count));
+ put_32aligned_be64(&asr->byte_count, htonll(byte_count));
+ asr->flow_count = htonl(stats->flow_count);
+
+ return msg;
+}
+
+enum ofperr
+ofputil_decode_aggregate_stats_reply(struct ofputil_aggregate_stats *stats,
+ const struct ofp_header *reply)
+{
+ struct ofp_aggregate_stats_reply *asr;
+ struct ofpbuf msg;
+
+ ofpbuf_use_const(&msg, reply, ntohs(reply->length));
+ ofpraw_pull_assert(&msg);
+
+ asr = msg.l3;
+ stats->packet_count = ntohll(get_32aligned_be64(&asr->packet_count));
+ stats->byte_count = ntohll(get_32aligned_be64(&asr->byte_count));
+ stats->flow_count = ntohl(asr->flow_count);
+
+ return 0;
+}
+
+/* Converts an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message 'oh' into an
+ * abstract ofputil_flow_removed in 'fr'. Returns 0 if successful, otherwise
+ * an OpenFlow error code. */
+enum ofperr
+ofputil_decode_flow_removed(struct ofputil_flow_removed *fr,
+ const struct ofp_header *oh)
+{
+ enum ofpraw raw;
+ struct ofpbuf b;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ raw = ofpraw_pull_assert(&b);
+ if (raw == OFPRAW_OFPT11_FLOW_REMOVED) {
+ const struct ofp12_flow_removed *ofr;
+ enum ofperr error;
+
+ ofr = ofpbuf_pull(&b, sizeof *ofr);
+
+ error = ofputil_pull_ofp11_match(&b, &fr->match, NULL);
+ if (error) {
+ return error;
+ }
+
+ fr->priority = ntohs(ofr->priority);
+ fr->cookie = ofr->cookie;
+ fr->reason = ofr->reason;
+ /* XXX: ofr->table_id is ignored */
+ fr->duration_sec = ntohl(ofr->duration_sec);
+ fr->duration_nsec = ntohl(ofr->duration_nsec);
+ fr->idle_timeout = ntohs(ofr->idle_timeout);
+ fr->hard_timeout = ntohs(ofr->hard_timeout);
+ fr->packet_count = ntohll(ofr->packet_count);
+ fr->byte_count = ntohll(ofr->byte_count);
+ } else if (raw == OFPRAW_OFPT10_FLOW_REMOVED) {
+ const struct ofp_flow_removed *ofr;
+
+ ofr = ofpbuf_pull(&b, sizeof *ofr);
+
+ ofputil_match_from_ofp10_match(&ofr->match, &fr->match);
+ fr->priority = ntohs(ofr->priority);
+ fr->cookie = ofr->cookie;
+ fr->reason = ofr->reason;
+ fr->duration_sec = ntohl(ofr->duration_sec);
+ fr->duration_nsec = ntohl(ofr->duration_nsec);
+ fr->idle_timeout = ntohs(ofr->idle_timeout);
+ fr->hard_timeout = 0;
+ fr->packet_count = ntohll(ofr->packet_count);
+ fr->byte_count = ntohll(ofr->byte_count);
+ } else if (raw == OFPRAW_NXT_FLOW_REMOVED) {
+ struct nx_flow_removed *nfr;
+ int error;
+
+ nfr = ofpbuf_pull(&b, sizeof *nfr);
+ error = nx_pull_match(&b, ntohs(nfr->match_len), &fr->match,
+ NULL, NULL);
+ if (error) {
+ return error;
+ }
+ if (b.size) {
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ fr->priority = ntohs(nfr->priority);
+ fr->cookie = nfr->cookie;
+ fr->reason = nfr->reason;
+ fr->duration_sec = ntohl(nfr->duration_sec);
+ fr->duration_nsec = ntohl(nfr->duration_nsec);
+ fr->idle_timeout = ntohs(nfr->idle_timeout);
+ fr->hard_timeout = 0;
+ fr->packet_count = ntohll(nfr->packet_count);
+ fr->byte_count = ntohll(nfr->byte_count);
+ } else {
+ NOT_REACHED();
+ }
+
+ return 0;
+}
+
+/* Converts abstract ofputil_flow_removed 'fr' into an OFPT_FLOW_REMOVED or
+ * NXT_FLOW_REMOVED message 'oh' according to 'protocol', and returns the
+ * message. */
+struct ofpbuf *
+ofputil_encode_flow_removed(const struct ofputil_flow_removed *fr,
+ enum ofputil_protocol protocol)
+{
+ struct ofpbuf *msg;
+
+ switch (protocol) {
+ case OFPUTIL_P_OF12: {
+ struct ofp12_flow_removed *ofr;
+
+ msg = ofpraw_alloc_xid(OFPRAW_OFPT11_FLOW_REMOVED,
+ ofputil_protocol_to_ofp_version(protocol),
+ htonl(0), NXM_TYPICAL_LEN);
+ ofr = ofpbuf_put_zeros(msg, sizeof *ofr);
+ ofr->cookie = fr->cookie;
+ ofr->priority = htons(fr->priority);
+ ofr->reason = fr->reason;
+ ofr->table_id = 0;
+ ofr->duration_sec = htonl(fr->duration_sec);
+ ofr->duration_nsec = htonl(fr->duration_nsec);
+ ofr->idle_timeout = htons(fr->idle_timeout);
+ ofr->hard_timeout = htons(fr->hard_timeout);
+ ofr->packet_count = htonll(fr->packet_count);
+ ofr->byte_count = htonll(fr->byte_count);
+ oxm_put_match(msg, &fr->match);
+ break;
+ }
+
+ case OFPUTIL_P_OF10:
+ case OFPUTIL_P_OF10_TID: {
+ struct ofp_flow_removed *ofr;
+
+ msg = ofpraw_alloc_xid(OFPRAW_OFPT10_FLOW_REMOVED, OFP10_VERSION,
+ htonl(0), 0);
+ ofr = ofpbuf_put_zeros(msg, sizeof *ofr);
+ ofputil_match_to_ofp10_match(&fr->match, &ofr->match);
+ ofr->cookie = fr->cookie;
+ ofr->priority = htons(fr->priority);
+ ofr->reason = fr->reason;
+ ofr->duration_sec = htonl(fr->duration_sec);
+ ofr->duration_nsec = htonl(fr->duration_nsec);
+ ofr->idle_timeout = htons(fr->idle_timeout);
+ ofr->packet_count = htonll(unknown_to_zero(fr->packet_count));
+ ofr->byte_count = htonll(unknown_to_zero(fr->byte_count));
+ break;
+ }
+
+ case OFPUTIL_P_NXM:
+ case OFPUTIL_P_NXM_TID: {
+ struct nx_flow_removed *nfr;
+ int match_len;
+
+ msg = ofpraw_alloc_xid(OFPRAW_NXT_FLOW_REMOVED, OFP10_VERSION,
+ htonl(0), NXM_TYPICAL_LEN);
+ nfr = ofpbuf_put_zeros(msg, sizeof *nfr);
+ match_len = nx_put_match(msg, &fr->match, 0, 0);
+
+ nfr = msg->l3;
+ nfr->cookie = fr->cookie;
+ nfr->priority = htons(fr->priority);
+ nfr->reason = fr->reason;
+ nfr->duration_sec = htonl(fr->duration_sec);
+ nfr->duration_nsec = htonl(fr->duration_nsec);
+ nfr->idle_timeout = htons(fr->idle_timeout);
+ nfr->match_len = htons(match_len);
+ nfr->packet_count = htonll(fr->packet_count);
+ nfr->byte_count = htonll(fr->byte_count);
+ break;
+ }
+
+ default:
+ NOT_REACHED();
+ }
+
+ return msg;
+}
+
+static void
+ofputil_decode_packet_in_finish(struct ofputil_packet_in *pin,
+ struct match *match, struct ofpbuf *b)
+{
+ pin->packet = b->data;
+ pin->packet_len = b->size;
+
+ pin->fmd.in_port = match->flow.in_port;
+ pin->fmd.tun_id = match->flow.tun_id;
+ pin->fmd.metadata = match->flow.metadata;
+ memcpy(pin->fmd.regs, match->flow.regs, sizeof pin->fmd.regs);
+}
+
+enum ofperr
+ofputil_decode_packet_in(struct ofputil_packet_in *pin,
+ const struct ofp_header *oh)
+{
+ enum ofpraw raw;
+ struct ofpbuf b;
+
+ memset(pin, 0, sizeof *pin);
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ raw = ofpraw_pull_assert(&b);
+ if (raw == OFPRAW_OFPT12_PACKET_IN) {
+ const struct ofp12_packet_in *opi;
+ struct match match;
+ int error;
+
+ opi = ofpbuf_pull(&b, sizeof *opi);
+ error = oxm_pull_match_loose(&b, &match);
+ if (error) {
+ return error;
+ }
+
+ if (!ofpbuf_try_pull(&b, 2)) {
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ pin->reason = opi->reason;
+ pin->table_id = opi->table_id;
+
+ pin->buffer_id = ntohl(opi->buffer_id);
+ pin->total_len = ntohs(opi->total_len);
+
+ ofputil_decode_packet_in_finish(pin, &match, &b);
+ } else if (raw == OFPRAW_OFPT10_PACKET_IN) {
+ const struct ofp_packet_in *opi;
+
+ opi = ofpbuf_pull(&b, offsetof(struct ofp_packet_in, data));
+
+ pin->packet = opi->data;
+ pin->packet_len = b.size;
+
+ pin->fmd.in_port = ntohs(opi->in_port);
+ pin->reason = opi->reason;
+ pin->buffer_id = ntohl(opi->buffer_id);
+ pin->total_len = ntohs(opi->total_len);
+ } else if (raw == OFPRAW_NXT_PACKET_IN) {
+ const struct nx_packet_in *npi;
+ struct match match;
+ int error;
+
+ npi = ofpbuf_pull(&b, sizeof *npi);
+ error = nx_pull_match_loose(&b, ntohs(npi->match_len), &match, NULL,
+ NULL);
+ if (error) {
+ return error;
+ }
+
+ if (!ofpbuf_try_pull(&b, 2)) {
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ pin->reason = npi->reason;
+ pin->table_id = npi->table_id;
+ pin->cookie = npi->cookie;
+
+ pin->buffer_id = ntohl(npi->buffer_id);
+ pin->total_len = ntohs(npi->total_len);
+
+ ofputil_decode_packet_in_finish(pin, &match, &b);
+ } else {
+ NOT_REACHED();
+ }
+
+ return 0;
+}
+
+static void
+ofputil_packet_in_to_match(const struct ofputil_packet_in *pin,
+ struct match *match)
+{
+ int i;
+
+ match_init_catchall(match);
+ if (pin->fmd.tun_id != htonll(0)) {
+ match_set_tun_id(match, pin->fmd.tun_id);
+ }
+ if (pin->fmd.metadata != htonll(0)) {
+ match_set_metadata(match, pin->fmd.metadata);
+ }
+
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ if (pin->fmd.regs[i]) {
+ match_set_reg(match, i, pin->fmd.regs[i]);
+ }
+ }
+
+ match_set_in_port(match, pin->fmd.in_port);
+}
+
+/* Converts abstract ofputil_packet_in 'pin' into a PACKET_IN message
+ * in the format specified by 'packet_in_format'. */
+struct ofpbuf *
+ofputil_encode_packet_in(const struct ofputil_packet_in *pin,
+ enum ofputil_protocol protocol,
+ enum nx_packet_in_format packet_in_format)
+{
+ size_t send_len = MIN(pin->send_len, pin->packet_len);
+ struct ofpbuf *packet;
+
+ /* Add OFPT_PACKET_IN. */
+ if (protocol == OFPUTIL_P_OF12) {
+ struct ofp12_packet_in *opi;
+ struct match match;
+
+ ofputil_packet_in_to_match(pin, &match);
+
+ /* The final argument is just an estimate of the space required. */
+ packet = ofpraw_alloc_xid(OFPRAW_OFPT12_PACKET_IN, OFP12_VERSION,
+ htonl(0), (sizeof(struct flow_metadata) * 2
+ + 2 + send_len));
+ ofpbuf_put_zeros(packet, sizeof *opi);
+ oxm_put_match(packet, &match);
+ ofpbuf_put_zeros(packet, 2);
+ ofpbuf_put(packet, pin->packet, send_len);
+
+ opi = packet->l3;
+ opi->buffer_id = htonl(pin->buffer_id);
+ opi->total_len = htons(pin->total_len);
+ opi->reason = pin->reason;
+ opi->table_id = pin->table_id;
+ } else if (packet_in_format == NXPIF_OPENFLOW10) {
+ struct ofp_packet_in *opi;
+
+ packet = ofpraw_alloc_xid(OFPRAW_OFPT10_PACKET_IN, OFP10_VERSION,
+ htonl(0), send_len);
+ opi = ofpbuf_put_zeros(packet, offsetof(struct ofp_packet_in, data));
+ opi->total_len = htons(pin->total_len);
+ opi->in_port = htons(pin->fmd.in_port);
+ opi->reason = pin->reason;
+ opi->buffer_id = htonl(pin->buffer_id);
+
+ ofpbuf_put(packet, pin->packet, send_len);
+ } else if (packet_in_format == NXPIF_NXM) {
+ struct nx_packet_in *npi;
+ struct match match;
+ size_t match_len;
+
+ ofputil_packet_in_to_match(pin, &match);
+
+ /* The final argument is just an estimate of the space required. */
+ packet = ofpraw_alloc_xid(OFPRAW_NXT_PACKET_IN, OFP10_VERSION,
+ htonl(0), (sizeof(struct flow_metadata) * 2
+ + 2 + send_len));
+ ofpbuf_put_zeros(packet, sizeof *npi);
+ match_len = nx_put_match(packet, &match, 0, 0);
+ ofpbuf_put_zeros(packet, 2);
+ ofpbuf_put(packet, pin->packet, send_len);
+
+ npi = packet->l3;
+ npi->buffer_id = htonl(pin->buffer_id);
+ npi->total_len = htons(pin->total_len);
+ npi->reason = pin->reason;
+ npi->table_id = pin->table_id;
+ npi->cookie = pin->cookie;
+ npi->match_len = htons(match_len);
+ } else {
+ NOT_REACHED();
+ }
+ ofpmsg_update_length(packet);
+
+ return packet;
+}
+
+const char *
+ofputil_packet_in_reason_to_string(enum ofp_packet_in_reason reason)
+{
+ static char s[INT_STRLEN(int) + 1];
+
+ switch (reason) {
+ case OFPR_NO_MATCH:
+ return "no_match";
+ case OFPR_ACTION:
+ return "action";
+ case OFPR_INVALID_TTL:
+ return "invalid_ttl";
+
+ case OFPR_N_REASONS:
+ default:
+ sprintf(s, "%d", (int) reason);
+ return s;
+ }
+}
+
+bool
+ofputil_packet_in_reason_from_string(const char *s,
+ enum ofp_packet_in_reason *reason)
+{
+ int i;
+
+ for (i = 0; i < OFPR_N_REASONS; i++) {
+ if (!strcasecmp(s, ofputil_packet_in_reason_to_string(i))) {
+ *reason = i;
+ return true;
+ }
+ }
+ return false;
+}
+
+/* Converts an OFPT_PACKET_OUT in 'opo' into an abstract ofputil_packet_out in
+ * 'po'.
+ *
+ * Uses 'ofpacts' to store the abstract OFPACT_* version of the packet out
+ * message's actions. The caller must initialize 'ofpacts' and retains
+ * ownership of it. 'po->ofpacts' will point into the 'ofpacts' buffer.
+ *
+ * Returns 0 if successful, otherwise an OFPERR_* value. */
+enum ofperr
+ofputil_decode_packet_out(struct ofputil_packet_out *po,
+ const struct ofp_header *oh,
+ struct ofpbuf *ofpacts)
+{
+ enum ofpraw raw;
+ struct ofpbuf b;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ raw = ofpraw_pull_assert(&b);
+
+ if (raw == OFPRAW_OFPT11_PACKET_OUT) {
+ enum ofperr error;
+ const struct ofp11_packet_out *opo = ofpbuf_pull(&b, sizeof *opo);
+
+ po->buffer_id = ntohl(opo->buffer_id);
+ error = ofputil_port_from_ofp11(opo->in_port, &po->in_port);
+ if (error) {
+ return error;
+ }
+
+ error = ofpacts_pull_openflow11_actions(&b, ntohs(opo->actions_len),
+ ofpacts);
+ if (error) {
+ return error;
+ }
+ } else if (raw == OFPRAW_OFPT10_PACKET_OUT) {
+ enum ofperr error;
+ const struct ofp_packet_out *opo = ofpbuf_pull(&b, sizeof *opo);
+
+ po->buffer_id = ntohl(opo->buffer_id);
+ po->in_port = ntohs(opo->in_port);
+
+ error = ofpacts_pull_openflow10(&b, ntohs(opo->actions_len), ofpacts);
+ if (error) {
+ return error;
+ }
+ } else {
+ NOT_REACHED();
+ }
+
+ if (po->in_port >= OFPP_MAX && po->in_port != OFPP_LOCAL
+ && po->in_port != OFPP_NONE && po->in_port != OFPP_CONTROLLER) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out has bad input port %#"PRIx16,
+ po->in_port);
+ return OFPERR_OFPBRC_BAD_PORT;
+ }
+
+ po->ofpacts = ofpacts->data;
+ po->ofpacts_len = ofpacts->size;
+
+ if (po->buffer_id == UINT32_MAX) {
+ po->packet = b.data;
+ po->packet_len = b.size;
+ } else {
+ po->packet = NULL;
+ po->packet_len = 0;
+ }
+
+ return 0;
+}
+\f
+/* ofputil_phy_port */
+
+/* NETDEV_F_* to and from OFPPF_* and OFPPF10_*. */
+BUILD_ASSERT_DECL((int) NETDEV_F_10MB_HD == OFPPF_10MB_HD); /* bit 0 */
+BUILD_ASSERT_DECL((int) NETDEV_F_10MB_FD == OFPPF_10MB_FD); /* bit 1 */
+BUILD_ASSERT_DECL((int) NETDEV_F_100MB_HD == OFPPF_100MB_HD); /* bit 2 */
+BUILD_ASSERT_DECL((int) NETDEV_F_100MB_FD == OFPPF_100MB_FD); /* bit 3 */
+BUILD_ASSERT_DECL((int) NETDEV_F_1GB_HD == OFPPF_1GB_HD); /* bit 4 */
+BUILD_ASSERT_DECL((int) NETDEV_F_1GB_FD == OFPPF_1GB_FD); /* bit 5 */
+BUILD_ASSERT_DECL((int) NETDEV_F_10GB_FD == OFPPF_10GB_FD); /* bit 6 */
+
+/* NETDEV_F_ bits 11...15 are OFPPF10_ bits 7...11: */
+BUILD_ASSERT_DECL((int) NETDEV_F_COPPER == (OFPPF10_COPPER << 4));
+BUILD_ASSERT_DECL((int) NETDEV_F_FIBER == (OFPPF10_FIBER << 4));
+BUILD_ASSERT_DECL((int) NETDEV_F_AUTONEG == (OFPPF10_AUTONEG << 4));
+BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE == (OFPPF10_PAUSE << 4));
+BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE_ASYM == (OFPPF10_PAUSE_ASYM << 4));
+
+static enum netdev_features
+netdev_port_features_from_ofp10(ovs_be32 ofp10_)
+{
+ uint32_t ofp10 = ntohl(ofp10_);
+ return (ofp10 & 0x7f) | ((ofp10 & 0xf80) << 4);
+}
+
+static ovs_be32
+netdev_port_features_to_ofp10(enum netdev_features features)
+{
+ return htonl((features & 0x7f) | ((features & 0xf800) >> 4));
+}
+
+BUILD_ASSERT_DECL((int) NETDEV_F_10MB_HD == OFPPF_10MB_HD); /* bit 0 */
+BUILD_ASSERT_DECL((int) NETDEV_F_10MB_FD == OFPPF_10MB_FD); /* bit 1 */
+BUILD_ASSERT_DECL((int) NETDEV_F_100MB_HD == OFPPF_100MB_HD); /* bit 2 */
+BUILD_ASSERT_DECL((int) NETDEV_F_100MB_FD == OFPPF_100MB_FD); /* bit 3 */
+BUILD_ASSERT_DECL((int) NETDEV_F_1GB_HD == OFPPF_1GB_HD); /* bit 4 */
+BUILD_ASSERT_DECL((int) NETDEV_F_1GB_FD == OFPPF_1GB_FD); /* bit 5 */
+BUILD_ASSERT_DECL((int) NETDEV_F_10GB_FD == OFPPF_10GB_FD); /* bit 6 */
+BUILD_ASSERT_DECL((int) NETDEV_F_40GB_FD == OFPPF11_40GB_FD); /* bit 7 */
+BUILD_ASSERT_DECL((int) NETDEV_F_100GB_FD == OFPPF11_100GB_FD); /* bit 8 */
+BUILD_ASSERT_DECL((int) NETDEV_F_1TB_FD == OFPPF11_1TB_FD); /* bit 9 */
+BUILD_ASSERT_DECL((int) NETDEV_F_OTHER == OFPPF11_OTHER); /* bit 10 */
+BUILD_ASSERT_DECL((int) NETDEV_F_COPPER == OFPPF11_COPPER); /* bit 11 */
+BUILD_ASSERT_DECL((int) NETDEV_F_FIBER == OFPPF11_FIBER); /* bit 12 */
+BUILD_ASSERT_DECL((int) NETDEV_F_AUTONEG == OFPPF11_AUTONEG); /* bit 13 */
+BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE == OFPPF11_PAUSE); /* bit 14 */
+BUILD_ASSERT_DECL((int) NETDEV_F_PAUSE_ASYM == OFPPF11_PAUSE_ASYM);/* bit 15 */
+
+static enum netdev_features
+netdev_port_features_from_ofp11(ovs_be32 ofp11)
+{
+ return ntohl(ofp11) & 0xffff;
+}
+
+static ovs_be32
+netdev_port_features_to_ofp11(enum netdev_features features)
+{
+ return htonl(features & 0xffff);
+}
+
+static enum ofperr
+ofputil_decode_ofp10_phy_port(struct ofputil_phy_port *pp,
+ const struct ofp10_phy_port *opp)
+{
+ memset(pp, 0, sizeof *pp);
+
+ pp->port_no = ntohs(opp->port_no);
+ memcpy(pp->hw_addr, opp->hw_addr, OFP_ETH_ALEN);
+ ovs_strlcpy(pp->name, opp->name, OFP_MAX_PORT_NAME_LEN);
+
+ pp->config = ntohl(opp->config) & OFPPC10_ALL;
+ pp->state = ntohl(opp->state) & OFPPS10_ALL;
+
+ pp->curr = netdev_port_features_from_ofp10(opp->curr);
+ pp->advertised = netdev_port_features_from_ofp10(opp->advertised);
+ pp->supported = netdev_port_features_from_ofp10(opp->supported);
+ pp->peer = netdev_port_features_from_ofp10(opp->peer);
+
+ pp->curr_speed = netdev_features_to_bps(pp->curr) / 1000;
+ pp->max_speed = netdev_features_to_bps(pp->supported) / 1000;
+
+ return 0;
+}
+
+static enum ofperr
+ofputil_decode_ofp11_port(struct ofputil_phy_port *pp,
+ const struct ofp11_port *op)
+{
+ enum ofperr error;
+
+ memset(pp, 0, sizeof *pp);
+
+ error = ofputil_port_from_ofp11(op->port_no, &pp->port_no);
+ if (error) {
+ return error;
+ }
+ memcpy(pp->hw_addr, op->hw_addr, OFP_ETH_ALEN);
+ ovs_strlcpy(pp->name, op->name, OFP_MAX_PORT_NAME_LEN);
+
+ pp->config = ntohl(op->config) & OFPPC11_ALL;
+ pp->state = ntohl(op->state) & OFPPC11_ALL;
+
+ pp->curr = netdev_port_features_from_ofp11(op->curr);
+ pp->advertised = netdev_port_features_from_ofp11(op->advertised);
+ pp->supported = netdev_port_features_from_ofp11(op->supported);
+ pp->peer = netdev_port_features_from_ofp11(op->peer);
+
+ pp->curr_speed = ntohl(op->curr_speed);
+ pp->max_speed = ntohl(op->max_speed);
+
+ return 0;
+}
+
+static size_t
+ofputil_get_phy_port_size(enum ofp_version ofp_version)
+{
+ switch (ofp_version) {
+ case OFP10_VERSION:
+ return sizeof(struct ofp10_phy_port);
+ case OFP11_VERSION:
+ case OFP12_VERSION:
+ return sizeof(struct ofp11_port);
+ default:
+ NOT_REACHED();
+ }
+}
+
+static void
+ofputil_encode_ofp10_phy_port(const struct ofputil_phy_port *pp,
+ struct ofp10_phy_port *opp)
+{
+ memset(opp, 0, sizeof *opp);
+
+ opp->port_no = htons(pp->port_no);
+ memcpy(opp->hw_addr, pp->hw_addr, ETH_ADDR_LEN);
+ ovs_strlcpy(opp->name, pp->name, OFP_MAX_PORT_NAME_LEN);
+
+ opp->config = htonl(pp->config & OFPPC10_ALL);
+ opp->state = htonl(pp->state & OFPPS10_ALL);
+
+ opp->curr = netdev_port_features_to_ofp10(pp->curr);
+ opp->advertised = netdev_port_features_to_ofp10(pp->advertised);
+ opp->supported = netdev_port_features_to_ofp10(pp->supported);
+ opp->peer = netdev_port_features_to_ofp10(pp->peer);
+}
+
+static void
+ofputil_encode_ofp11_port(const struct ofputil_phy_port *pp,
+ struct ofp11_port *op)
+{
+ memset(op, 0, sizeof *op);
+
+ op->port_no = ofputil_port_to_ofp11(pp->port_no);
+ memcpy(op->hw_addr, pp->hw_addr, ETH_ADDR_LEN);
+ ovs_strlcpy(op->name, pp->name, OFP_MAX_PORT_NAME_LEN);
+
+ op->config = htonl(pp->config & OFPPC11_ALL);
+ op->state = htonl(pp->state & OFPPS11_ALL);
+
+ op->curr = netdev_port_features_to_ofp11(pp->curr);
+ op->advertised = netdev_port_features_to_ofp11(pp->advertised);
+ op->supported = netdev_port_features_to_ofp11(pp->supported);
+ op->peer = netdev_port_features_to_ofp11(pp->peer);
+
+ op->curr_speed = htonl(pp->curr_speed);
+ op->max_speed = htonl(pp->max_speed);
+}
+
+static void
+ofputil_put_phy_port(enum ofp_version ofp_version,
+ const struct ofputil_phy_port *pp, struct ofpbuf *b)
+{
+ switch (ofp_version) {
+ case OFP10_VERSION: {
+ struct ofp10_phy_port *opp;
+ if (b->size + sizeof *opp <= UINT16_MAX) {
+ opp = ofpbuf_put_uninit(b, sizeof *opp);
+ ofputil_encode_ofp10_phy_port(pp, opp);
+ }
+ break;
+ }
+
+ case OFP11_VERSION:
+ case OFP12_VERSION: {
+ struct ofp11_port *op;
+ if (b->size + sizeof *op <= UINT16_MAX) {
+ op = ofpbuf_put_uninit(b, sizeof *op);
+ ofputil_encode_ofp11_port(pp, op);
+ }
+ break;
+ }
+
+ default:
+ NOT_REACHED();
+ }
+}
+
+void
+ofputil_append_port_desc_stats_reply(enum ofp_version ofp_version,
+ const struct ofputil_phy_port *pp,
+ struct list *replies)
+{
+ switch (ofp_version) {
+ case OFP10_VERSION: {
+ struct ofp10_phy_port *opp;
+
+ opp = ofpmp_append(replies, sizeof *opp);
+ ofputil_encode_ofp10_phy_port(pp, opp);
+ break;
+ }
+
+ case OFP11_VERSION:
+ case OFP12_VERSION: {
+ struct ofp11_port *op;
+
+ op = ofpmp_append(replies, sizeof *op);
+ ofputil_encode_ofp11_port(pp, op);
+ break;
+ }
+
+ default:
+ NOT_REACHED();
+ }
+}
+\f
+/* ofputil_switch_features */
+
+#define OFPC_COMMON (OFPC_FLOW_STATS | OFPC_TABLE_STATS | OFPC_PORT_STATS | \
+ OFPC_IP_REASM | OFPC_QUEUE_STATS)
+BUILD_ASSERT_DECL((int) OFPUTIL_C_FLOW_STATS == OFPC_FLOW_STATS);
+BUILD_ASSERT_DECL((int) OFPUTIL_C_TABLE_STATS == OFPC_TABLE_STATS);
+BUILD_ASSERT_DECL((int) OFPUTIL_C_PORT_STATS == OFPC_PORT_STATS);
+BUILD_ASSERT_DECL((int) OFPUTIL_C_IP_REASM == OFPC_IP_REASM);
+BUILD_ASSERT_DECL((int) OFPUTIL_C_QUEUE_STATS == OFPC_QUEUE_STATS);
+BUILD_ASSERT_DECL((int) OFPUTIL_C_ARP_MATCH_IP == OFPC_ARP_MATCH_IP);
+
+struct ofputil_action_bit_translation {
+ enum ofputil_action_bitmap ofputil_bit;
+ int of_bit;
+};
+
+static const struct ofputil_action_bit_translation of10_action_bits[] = {
+ { OFPUTIL_A_OUTPUT, OFPAT10_OUTPUT },
+ { OFPUTIL_A_SET_VLAN_VID, OFPAT10_SET_VLAN_VID },
+ { OFPUTIL_A_SET_VLAN_PCP, OFPAT10_SET_VLAN_PCP },
+ { OFPUTIL_A_STRIP_VLAN, OFPAT10_STRIP_VLAN },
+ { OFPUTIL_A_SET_DL_SRC, OFPAT10_SET_DL_SRC },
+ { OFPUTIL_A_SET_DL_DST, OFPAT10_SET_DL_DST },
+ { OFPUTIL_A_SET_NW_SRC, OFPAT10_SET_NW_SRC },
+ { OFPUTIL_A_SET_NW_DST, OFPAT10_SET_NW_DST },
+ { OFPUTIL_A_SET_NW_TOS, OFPAT10_SET_NW_TOS },
+ { OFPUTIL_A_SET_TP_SRC, OFPAT10_SET_TP_SRC },
+ { OFPUTIL_A_SET_TP_DST, OFPAT10_SET_TP_DST },
+ { OFPUTIL_A_ENQUEUE, OFPAT10_ENQUEUE },
+ { 0, 0 },
+};
+
+static enum ofputil_action_bitmap
+decode_action_bits(ovs_be32 of_actions,
+ const struct ofputil_action_bit_translation *x)
+{
+ enum ofputil_action_bitmap ofputil_actions;
+
+ ofputil_actions = 0;
+ for (; x->ofputil_bit; x++) {
+ if (of_actions & htonl(1u << x->of_bit)) {
+ ofputil_actions |= x->ofputil_bit;
+ }
+ }
+ return ofputil_actions;
+}
+
+static uint32_t
+ofputil_capabilities_mask(enum ofp_version ofp_version)
+{
+ /* Handle capabilities whose bit is unique for all Open Flow versions */
+ switch (ofp_version) {
+ case OFP10_VERSION:
+ case OFP11_VERSION:
+ return OFPC_COMMON | OFPC_ARP_MATCH_IP;
+ case OFP12_VERSION:
+ return OFPC_COMMON | OFPC12_PORT_BLOCKED;
+ default:
+ /* Caller needs to check osf->header.version itself */
+ return 0;
+ }
+}
+
+/* Decodes an OpenFlow 1.0 or 1.1 "switch_features" structure 'osf' into an
+ * abstract representation in '*features'. Initializes '*b' to iterate over
+ * the OpenFlow port structures following 'osf' with later calls to
+ * ofputil_pull_phy_port(). Returns 0 if successful, otherwise an
+ * OFPERR_* value. */
+enum ofperr
+ofputil_decode_switch_features(const struct ofp_header *oh,
+ struct ofputil_switch_features *features,
+ struct ofpbuf *b)
+{
+ const struct ofp_switch_features *osf;
+ enum ofpraw raw;
+
+ ofpbuf_use_const(b, oh, ntohs(oh->length));
+ raw = ofpraw_pull_assert(b);
+
+ osf = ofpbuf_pull(b, sizeof *osf);
+ features->datapath_id = ntohll(osf->datapath_id);
+ features->n_buffers = ntohl(osf->n_buffers);
+ features->n_tables = osf->n_tables;
+
+ features->capabilities = ntohl(osf->capabilities) &
+ ofputil_capabilities_mask(oh->version);
+
+ if (b->size % ofputil_get_phy_port_size(oh->version)) {
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ if (raw == OFPRAW_OFPT10_FEATURES_REPLY) {
+ if (osf->capabilities & htonl(OFPC10_STP)) {
+ features->capabilities |= OFPUTIL_C_STP;
+ }
+ features->actions = decode_action_bits(osf->actions, of10_action_bits);
+ } else if (raw == OFPRAW_OFPT11_FEATURES_REPLY) {
+ if (osf->capabilities & htonl(OFPC11_GROUP_STATS)) {
+ features->capabilities |= OFPUTIL_C_GROUP_STATS;
+ }
+ features->actions = 0;
+ } else {
+ return OFPERR_OFPBRC_BAD_VERSION;
+ }
+
+ return 0;
+}
+
+/* Returns true if the maximum number of ports are in 'oh'. */
+static bool
+max_ports_in_features(const struct ofp_header *oh)
+{
+ size_t pp_size = ofputil_get_phy_port_size(oh->version);
+ return ntohs(oh->length) + pp_size > UINT16_MAX;
+}
+
+/* Given a buffer 'b' that contains a Features Reply message, checks if
+ * it contains the maximum number of ports that will fit. If so, it
+ * returns true and removes the ports from the message. The caller
+ * should then send an OFPST_PORT_DESC stats request to get the ports,
+ * since the switch may have more ports than could be represented in the
+ * Features Reply. Otherwise, returns false.
+ */
+bool
+ofputil_switch_features_ports_trunc(struct ofpbuf *b)
+{
+ struct ofp_header *oh = b->data;
+
+ if (max_ports_in_features(oh)) {
+ /* Remove all the ports. */
+ b->size = (sizeof(struct ofp_header)
+ + sizeof(struct ofp_switch_features));
+ ofpmsg_update_length(b);
+
+ return true;
+ }
+
+ return false;
+}
+
+static ovs_be32
+encode_action_bits(enum ofputil_action_bitmap ofputil_actions,
+ const struct ofputil_action_bit_translation *x)
+{
+ uint32_t of_actions;
+
+ of_actions = 0;
+ for (; x->ofputil_bit; x++) {
+ if (ofputil_actions & x->ofputil_bit) {
+ of_actions |= 1 << x->of_bit;
+ }
+ }
+ return htonl(of_actions);
+}
+
+/* Returns a buffer owned by the caller that encodes 'features' in the format
+ * required by 'protocol' with the given 'xid'. The caller should append port
+ * information to the buffer with subsequent calls to
+ * ofputil_put_switch_features_port(). */
+struct ofpbuf *
+ofputil_encode_switch_features(const struct ofputil_switch_features *features,
+ enum ofputil_protocol protocol, ovs_be32 xid)
+{
+ struct ofp_switch_features *osf;
+ struct ofpbuf *b;
+ enum ofp_version version;
+ enum ofpraw raw;
+
+ version = ofputil_protocol_to_ofp_version(protocol);
+ switch (version) {
+ case OFP10_VERSION:
+ raw = OFPRAW_OFPT10_FEATURES_REPLY;
+ break;
+ case OFP11_VERSION:
+ case OFP12_VERSION:
+ raw = OFPRAW_OFPT11_FEATURES_REPLY;
+ break;
+ default:
+ NOT_REACHED();
+ }
+ b = ofpraw_alloc_xid(raw, version, xid, 0);
+ osf = ofpbuf_put_zeros(b, sizeof *osf);
+ osf->datapath_id = htonll(features->datapath_id);
+ osf->n_buffers = htonl(features->n_buffers);
+ osf->n_tables = features->n_tables;
+
+ osf->capabilities = htonl(features->capabilities & OFPC_COMMON);
+ osf->capabilities = htonl(features->capabilities &
+ ofputil_capabilities_mask(version));
+ switch (version) {
+ case OFP10_VERSION:
+ if (features->capabilities & OFPUTIL_C_STP) {
+ osf->capabilities |= htonl(OFPC10_STP);
+ }
+ osf->actions = encode_action_bits(features->actions, of10_action_bits);
+ break;
+ case OFP11_VERSION:
+ case OFP12_VERSION:
+ if (features->capabilities & OFPUTIL_C_GROUP_STATS) {
+ osf->capabilities |= htonl(OFPC11_GROUP_STATS);
+ }
+ break;
+ default:
+ NOT_REACHED();
+ }
+
+ return b;
+}
+
+/* Encodes 'pp' into the format required by the switch_features message already
+ * in 'b', which should have been returned by ofputil_encode_switch_features(),
+ * and appends the encoded version to 'b'. */
+void
+ofputil_put_switch_features_port(const struct ofputil_phy_port *pp,
+ struct ofpbuf *b)
+{
+ const struct ofp_header *oh = b->data;
+
+ ofputil_put_phy_port(oh->version, pp, b);
+}
+\f
+/* ofputil_port_status */
+
+/* Decodes the OpenFlow "port status" message in '*ops' into an abstract form
+ * in '*ps'. Returns 0 if successful, otherwise an OFPERR_* value. */
+enum ofperr
+ofputil_decode_port_status(const struct ofp_header *oh,
+ struct ofputil_port_status *ps)
+{
+ const struct ofp_port_status *ops;
+ struct ofpbuf b;
+ int retval;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ ofpraw_pull_assert(&b);
+ ops = ofpbuf_pull(&b, sizeof *ops);
+
+ if (ops->reason != OFPPR_ADD &&
+ ops->reason != OFPPR_DELETE &&
+ ops->reason != OFPPR_MODIFY) {
+ return OFPERR_NXBRC_BAD_REASON;
+ }
+ ps->reason = ops->reason;
+
+ retval = ofputil_pull_phy_port(oh->version, &b, &ps->desc);
+ assert(retval != EOF);
+ return retval;
+}
+
+/* Converts the abstract form of a "port status" message in '*ps' into an
+ * OpenFlow message suitable for 'protocol', and returns that encoded form in
+ * a buffer owned by the caller. */
+struct ofpbuf *
+ofputil_encode_port_status(const struct ofputil_port_status *ps,
+ enum ofputil_protocol protocol)
+{
+ struct ofp_port_status *ops;
+ struct ofpbuf *b;
+ enum ofp_version version;
+ enum ofpraw raw;
+
+ version = ofputil_protocol_to_ofp_version(protocol);
+ switch (version) {
+ case OFP10_VERSION:
+ raw = OFPRAW_OFPT10_PORT_STATUS;
+ break;
+
+ case OFP11_VERSION:
+ case OFP12_VERSION:
+ raw = OFPRAW_OFPT11_PORT_STATUS;
+ break;
+
+ default:
+ NOT_REACHED();
+ }
+
+ b = ofpraw_alloc_xid(raw, version, htonl(0), 0);
+ ops = ofpbuf_put_zeros(b, sizeof *ops);
+ ops->reason = ps->reason;
+ ofputil_put_phy_port(version, &ps->desc, b);
+ ofpmsg_update_length(b);
+ return b;
+}
+\f
+/* ofputil_port_mod */
+
+/* Decodes the OpenFlow "port mod" message in '*oh' into an abstract form in
+ * '*pm'. Returns 0 if successful, otherwise an OFPERR_* value. */
+enum ofperr
+ofputil_decode_port_mod(const struct ofp_header *oh,
+ struct ofputil_port_mod *pm)
+{
+ enum ofpraw raw;
+ struct ofpbuf b;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ raw = ofpraw_pull_assert(&b);
+
+ if (raw == OFPRAW_OFPT10_PORT_MOD) {
+ const struct ofp10_port_mod *opm = b.data;
+
+ pm->port_no = ntohs(opm->port_no);
+ memcpy(pm->hw_addr, opm->hw_addr, ETH_ADDR_LEN);
+ pm->config = ntohl(opm->config) & OFPPC10_ALL;
+ pm->mask = ntohl(opm->mask) & OFPPC10_ALL;
+ pm->advertise = netdev_port_features_from_ofp10(opm->advertise);
+ } else if (raw == OFPRAW_OFPT11_PORT_MOD) {
+ const struct ofp11_port_mod *opm = b.data;
+ enum ofperr error;
+
+ error = ofputil_port_from_ofp11(opm->port_no, &pm->port_no);
+ if (error) {
+ return error;
+ }
+
+ memcpy(pm->hw_addr, opm->hw_addr, ETH_ADDR_LEN);
+ pm->config = ntohl(opm->config) & OFPPC11_ALL;
+ pm->mask = ntohl(opm->mask) & OFPPC11_ALL;
+ pm->advertise = netdev_port_features_from_ofp11(opm->advertise);
+ } else {
+ return OFPERR_OFPBRC_BAD_TYPE;
+ }
+
+ pm->config &= pm->mask;
+ return 0;
+}
+
+/* Converts the abstract form of a "port mod" message in '*pm' into an OpenFlow
+ * message suitable for 'protocol', and returns that encoded form in a buffer
+ * owned by the caller. */
+struct ofpbuf *
+ofputil_encode_port_mod(const struct ofputil_port_mod *pm,
+ enum ofputil_protocol protocol)
+{
+ enum ofp_version ofp_version = ofputil_protocol_to_ofp_version(protocol);
+ struct ofpbuf *b;
+
+ switch (ofp_version) {
+ case OFP10_VERSION: {
+ struct ofp10_port_mod *opm;
+
+ b = ofpraw_alloc(OFPRAW_OFPT10_PORT_MOD, ofp_version, 0);
+ opm = ofpbuf_put_zeros(b, sizeof *opm);
+ opm->port_no = htons(pm->port_no);
+ memcpy(opm->hw_addr, pm->hw_addr, ETH_ADDR_LEN);
+ opm->config = htonl(pm->config & OFPPC10_ALL);
+ opm->mask = htonl(pm->mask & OFPPC10_ALL);
+ opm->advertise = netdev_port_features_to_ofp10(pm->advertise);
+ break;
+ }
+
+ case OFP11_VERSION:
+ case OFP12_VERSION: {
+ struct ofp11_port_mod *opm;
+
+ b = ofpraw_alloc(OFPRAW_OFPT11_PORT_MOD, ofp_version, 0);
+ opm = ofpbuf_put_zeros(b, sizeof *opm);
+ opm->port_no = ofputil_port_to_ofp11(pm->port_no);
+ memcpy(opm->hw_addr, pm->hw_addr, ETH_ADDR_LEN);
+ opm->config = htonl(pm->config & OFPPC11_ALL);
+ opm->mask = htonl(pm->mask & OFPPC11_ALL);
+ opm->advertise = netdev_port_features_to_ofp11(pm->advertise);
+ break;
+ }
+
+ default:
+ NOT_REACHED();
+ }
+
+ return b;
+}
+\f
+/* Table stats. */
+
+static void
+ofputil_put_ofp10_table_stats(const struct ofp12_table_stats *in,
+ struct ofpbuf *buf)
+{
+ struct wc_map {
+ enum ofp_flow_wildcards wc10;
+ enum oxm12_ofb_match_fields mf12;
+ };
+
+ static const struct wc_map wc_map[] = {
+ { OFPFW10_IN_PORT, OFPXMT12_OFB_IN_PORT },
+ { OFPFW10_DL_VLAN, OFPXMT12_OFB_VLAN_VID },
+ { OFPFW10_DL_SRC, OFPXMT12_OFB_ETH_SRC },
+ { OFPFW10_DL_DST, OFPXMT12_OFB_ETH_DST},
+ { OFPFW10_DL_TYPE, OFPXMT12_OFB_ETH_TYPE },
+ { OFPFW10_NW_PROTO, OFPXMT12_OFB_IP_PROTO },
+ { OFPFW10_TP_SRC, OFPXMT12_OFB_TCP_SRC },
+ { OFPFW10_TP_DST, OFPXMT12_OFB_TCP_DST },
+ { OFPFW10_NW_SRC_MASK, OFPXMT12_OFB_IPV4_SRC },
+ { OFPFW10_NW_DST_MASK, OFPXMT12_OFB_IPV4_DST },
+ { OFPFW10_DL_VLAN_PCP, OFPXMT12_OFB_VLAN_PCP },
+ { OFPFW10_NW_TOS, OFPXMT12_OFB_IP_DSCP },
+ };
+
+ struct ofp10_table_stats *out;
+ const struct wc_map *p;
+
+ out = ofpbuf_put_uninit(buf, sizeof *out);
+ out->table_id = in->table_id;
+ strcpy(out->name, in->name);
+ out->wildcards = 0;
+ for (p = wc_map; p < &wc_map[ARRAY_SIZE(wc_map)]; p++) {
+ if (in->wildcards & htonll(1ULL << p->mf12)) {
+ out->wildcards |= htonl(p->wc10);
+ }
+ }
+ out->max_entries = in->max_entries;
+ out->active_count = in->active_count;
+ put_32aligned_be64(&out->lookup_count, in->lookup_count);
+ put_32aligned_be64(&out->matched_count, in->matched_count);
+}
+
+static ovs_be32
+oxm12_to_ofp11_flow_match_fields(ovs_be64 oxm12)
{
- *bufferp = ofpbuf_new(openflow_len);
- return put_openflow_xid(openflow_len, type, alloc_xid(), *bufferp);
+ struct map {
+ enum ofp11_flow_match_fields fmf11;
+ enum oxm12_ofb_match_fields mf12;
+ };
+
+ static const struct map map[] = {
+ { OFPFMF11_IN_PORT, OFPXMT12_OFB_IN_PORT },
+ { OFPFMF11_DL_VLAN, OFPXMT12_OFB_VLAN_VID },
+ { OFPFMF11_DL_VLAN_PCP, OFPXMT12_OFB_VLAN_PCP },
+ { OFPFMF11_DL_TYPE, OFPXMT12_OFB_ETH_TYPE },
+ { OFPFMF11_NW_TOS, OFPXMT12_OFB_IP_DSCP },
+ { OFPFMF11_NW_PROTO, OFPXMT12_OFB_IP_PROTO },
+ { OFPFMF11_TP_SRC, OFPXMT12_OFB_TCP_SRC },
+ { OFPFMF11_TP_DST, OFPXMT12_OFB_TCP_DST },
+ { OFPFMF11_MPLS_LABEL, OFPXMT12_OFB_MPLS_LABEL },
+ { OFPFMF11_MPLS_TC, OFPXMT12_OFB_MPLS_TC },
+ /* I don't know what OFPFMF11_TYPE means. */
+ { OFPFMF11_DL_SRC, OFPXMT12_OFB_ETH_SRC },
+ { OFPFMF11_DL_DST, OFPXMT12_OFB_ETH_DST },
+ { OFPFMF11_NW_SRC, OFPXMT12_OFB_IPV4_SRC },
+ { OFPFMF11_NW_DST, OFPXMT12_OFB_IPV4_DST },
+ { OFPFMF11_METADATA, OFPXMT12_OFB_METADATA },
+ };
+
+ const struct map *p;
+ uint32_t fmf11;
+
+ fmf11 = 0;
+ for (p = map; p < &map[ARRAY_SIZE(map)]; p++) {
+ if (oxm12 & htonll(1ULL << p->mf12)) {
+ fmf11 |= p->fmf11;
+ }
+ }
+ return htonl(fmf11);
}
-/* Allocates and stores in '*bufferp' a new ofpbuf with a size of
- * 'openflow_len', starting with an OpenFlow header with the given 'type' and
- * transaction id 'xid'. Allocated bytes beyond the header, if any, are
- * zeroed.
- *
- * The caller is responsible for freeing '*bufferp' when it is no longer
- * needed.
- *
- * The OpenFlow header length is initially set to 'openflow_len'; if the
- * message is later extended, the length should be updated with
- * update_openflow_length() before sending.
- *
- * Returns the header. */
-void *
-make_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
- struct ofpbuf **bufferp)
+static void
+ofputil_put_ofp11_table_stats(const struct ofp12_table_stats *in,
+ struct ofpbuf *buf)
{
- *bufferp = ofpbuf_new(openflow_len);
- return put_openflow_xid(openflow_len, type, xid, *bufferp);
+ struct ofp11_table_stats *out;
+
+ out = ofpbuf_put_uninit(buf, sizeof *out);
+ out->table_id = in->table_id;
+ strcpy(out->name, in->name);
+ out->wildcards = oxm12_to_ofp11_flow_match_fields(in->wildcards);
+ out->match = oxm12_to_ofp11_flow_match_fields(in->match);
+ out->instructions = in->instructions;
+ out->write_actions = in->write_actions;
+ out->apply_actions = in->apply_actions;
+ out->config = in->config;
+ out->max_entries = in->max_entries;
+ out->active_count = in->active_count;
+ out->lookup_count = in->lookup_count;
+ out->matched_count = in->matched_count;
}
-/* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
- * with the given 'type' and an arbitrary transaction id. Allocated bytes
- * beyond the header, if any, are zeroed.
- *
- * The OpenFlow header length is initially set to 'openflow_len'; if the
- * message is later extended, the length should be updated with
- * update_openflow_length() before sending.
- *
- * Returns the header. */
-void *
-put_openflow(size_t openflow_len, uint8_t type, struct ofpbuf *buffer)
+struct ofpbuf *
+ofputil_encode_table_stats_reply(const struct ofp12_table_stats stats[], int n,
+ const struct ofp_header *request)
{
- return put_openflow_xid(openflow_len, type, alloc_xid(), buffer);
+ struct ofpbuf *reply;
+ int i;
+
+ reply = ofpraw_alloc_stats_reply(request, n * sizeof *stats);
+
+ switch ((enum ofp_version) request->version) {
+ case OFP10_VERSION:
+ for (i = 0; i < n; i++) {
+ ofputil_put_ofp10_table_stats(&stats[i], reply);
+ }
+ break;
+
+ case OFP11_VERSION:
+ for (i = 0; i < n; i++) {
+ ofputil_put_ofp11_table_stats(&stats[i], reply);
+ }
+ break;
+
+ case OFP12_VERSION:
+ ofpbuf_put(reply, stats, n * sizeof *stats);
+ break;
+
+ default:
+ NOT_REACHED();
+ }
+
+ return reply;
}
+\f
+/* ofputil_flow_monitor_request */
-/* Appends 'openflow_len' bytes to 'buffer', starting with an OpenFlow header
- * with the given 'type' and an transaction id 'xid'. Allocated bytes beyond
- * the header, if any, are zeroed.
+/* Converts an NXST_FLOW_MONITOR request in 'msg' into an abstract
+ * ofputil_flow_monitor_request in 'rq'.
*
- * The OpenFlow header length is initially set to 'openflow_len'; if the
- * message is later extended, the length should be updated with
- * update_openflow_length() before sending.
+ * Multiple NXST_FLOW_MONITOR requests can be packed into a single OpenFlow
+ * message. Calling this function multiple times for a single 'msg' iterates
+ * through the requests. The caller must initially leave 'msg''s layer
+ * pointers null and not modify them between calls.
*
- * Returns the header. */
-void *
-put_openflow_xid(size_t openflow_len, uint8_t type, uint32_t xid,
- struct ofpbuf *buffer)
+ * Returns 0 if successful, EOF if no requests were left in this 'msg',
+ * otherwise an OFPERR_* value. */
+int
+ofputil_decode_flow_monitor_request(struct ofputil_flow_monitor_request *rq,
+ struct ofpbuf *msg)
{
- struct ofp_header *oh;
+ struct nx_flow_monitor_request *nfmr;
+ uint16_t flags;
+
+ if (!msg->l2) {
+ msg->l2 = msg->data;
+ ofpraw_pull_assert(msg);
+ }
+
+ if (!msg->size) {
+ return EOF;
+ }
+
+ nfmr = ofpbuf_try_pull(msg, sizeof *nfmr);
+ if (!nfmr) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR request has %zu "
+ "leftover bytes at end", msg->size);
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ flags = ntohs(nfmr->flags);
+ if (!(flags & (NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY))
+ || flags & ~(NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE
+ | NXFMF_MODIFY | NXFMF_ACTIONS | NXFMF_OWN)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR has bad flags %#"PRIx16,
+ flags);
+ return OFPERR_NXBRC_FM_BAD_FLAGS;
+ }
- assert(openflow_len >= sizeof *oh);
- assert(openflow_len <= UINT16_MAX);
+ if (!is_all_zeros(nfmr->zeros, sizeof nfmr->zeros)) {
+ return OFPERR_NXBRC_MUST_BE_ZERO;
+ }
+
+ rq->id = ntohl(nfmr->id);
+ rq->flags = flags;
+ rq->out_port = ntohs(nfmr->out_port);
+ rq->table_id = nfmr->table_id;
- oh = ofpbuf_put_uninit(buffer, openflow_len);
- oh->version = OFP_VERSION;
- oh->type = type;
- oh->length = htons(openflow_len);
- oh->xid = xid;
- memset(oh + 1, 0, openflow_len - sizeof *oh);
- return oh;
+ return nx_pull_match(msg, ntohs(nfmr->match_len), &rq->match, NULL, NULL);
}
-/* Updates the 'length' field of the OpenFlow message in 'buffer' to
- * 'buffer->size'. */
void
-update_openflow_length(struct ofpbuf *buffer)
+ofputil_append_flow_monitor_request(
+ const struct ofputil_flow_monitor_request *rq, struct ofpbuf *msg)
{
- struct ofp_header *oh = ofpbuf_at_assert(buffer, 0, sizeof *oh);
- oh->length = htons(buffer->size);
-}
+ struct nx_flow_monitor_request *nfmr;
+ size_t start_ofs;
+ int match_len;
-struct ofpbuf *
-make_flow_mod(uint16_t command, const flow_t *flow, size_t actions_len)
-{
- struct ofp_flow_mod *ofm;
- size_t size = sizeof *ofm + actions_len;
- struct ofpbuf *out = ofpbuf_new(size);
- ofm = ofpbuf_put_zeros(out, sizeof *ofm);
- ofm->header.version = OFP_VERSION;
- ofm->header.type = OFPT_FLOW_MOD;
- ofm->header.length = htons(size);
- ofm->cookie = 0;
- ofm->match.wildcards = htonl(0);
- ofm->match.in_port = htons(flow->in_port == ODPP_LOCAL ? OFPP_LOCAL
- : flow->in_port);
- memcpy(ofm->match.dl_src, flow->dl_src, sizeof ofm->match.dl_src);
- memcpy(ofm->match.dl_dst, flow->dl_dst, sizeof ofm->match.dl_dst);
- ofm->match.dl_vlan = flow->dl_vlan;
- ofm->match.dl_vlan_pcp = flow->dl_vlan_pcp;
- ofm->match.dl_type = flow->dl_type;
- ofm->match.nw_src = flow->nw_src;
- ofm->match.nw_dst = flow->nw_dst;
- ofm->match.nw_proto = flow->nw_proto;
- ofm->match.nw_tos = flow->nw_tos;
- ofm->match.tp_src = flow->tp_src;
- ofm->match.tp_dst = flow->tp_dst;
- ofm->command = htons(command);
- return out;
-}
+ if (!msg->size) {
+ ofpraw_put(OFPRAW_NXST_FLOW_MONITOR_REQUEST, OFP10_VERSION, msg);
+ }
-struct ofpbuf *
-make_add_flow(const flow_t *flow, uint32_t buffer_id,
- uint16_t idle_timeout, size_t actions_len)
-{
- struct ofpbuf *out = make_flow_mod(OFPFC_ADD, flow, actions_len);
- struct ofp_flow_mod *ofm = out->data;
- ofm->idle_timeout = htons(idle_timeout);
- ofm->hard_timeout = htons(OFP_FLOW_PERMANENT);
- ofm->buffer_id = htonl(buffer_id);
- return out;
+ start_ofs = msg->size;
+ ofpbuf_put_zeros(msg, sizeof *nfmr);
+ match_len = nx_put_match(msg, &rq->match, htonll(0), htonll(0));
+
+ nfmr = ofpbuf_at_assert(msg, start_ofs, sizeof *nfmr);
+ nfmr->id = htonl(rq->id);
+ nfmr->flags = htons(rq->flags);
+ nfmr->out_port = htons(rq->out_port);
+ nfmr->match_len = htons(match_len);
+ nfmr->table_id = rq->table_id;
}
-struct ofpbuf *
-make_del_flow(const flow_t *flow)
+/* Converts an NXST_FLOW_MONITOR reply (also known as a flow update) in 'msg'
+ * into an abstract ofputil_flow_update in 'update'. The caller must have
+ * initialized update->match to point to space allocated for a match.
+ *
+ * Uses 'ofpacts' to store the abstract OFPACT_* version of the update's
+ * actions (except for NXFME_ABBREV, which never includes actions). The caller
+ * must initialize 'ofpacts' and retains ownership of it. 'update->ofpacts'
+ * will point into the 'ofpacts' buffer.
+ *
+ * Multiple flow updates can be packed into a single OpenFlow message. Calling
+ * this function multiple times for a single 'msg' iterates through the
+ * updates. The caller must initially leave 'msg''s layer pointers null and
+ * not modify them between calls.
+ *
+ * Returns 0 if successful, EOF if no updates were left in this 'msg',
+ * otherwise an OFPERR_* value. */
+int
+ofputil_decode_flow_update(struct ofputil_flow_update *update,
+ struct ofpbuf *msg, struct ofpbuf *ofpacts)
{
- struct ofpbuf *out = make_flow_mod(OFPFC_DELETE_STRICT, flow, 0);
- struct ofp_flow_mod *ofm = out->data;
- ofm->out_port = htons(OFPP_NONE);
- return out;
-}
+ struct nx_flow_update_header *nfuh;
+ unsigned int length;
-struct ofpbuf *
-make_add_simple_flow(const flow_t *flow,
- uint32_t buffer_id, uint16_t out_port,
- uint16_t idle_timeout)
-{
- if (out_port != OFPP_NONE) {
- struct ofp_action_output *oao;
- struct ofpbuf *buffer;
-
- buffer = make_add_flow(flow, buffer_id, idle_timeout, sizeof *oao);
- oao = ofpbuf_put_zeros(buffer, sizeof *oao);
- oao->type = htons(OFPAT_OUTPUT);
- oao->len = htons(sizeof *oao);
- oao->port = htons(out_port);
- return buffer;
- } else {
- return make_add_flow(flow, buffer_id, idle_timeout, 0);
+ if (!msg->l2) {
+ msg->l2 = msg->data;
+ ofpraw_pull_assert(msg);
}
-}
-struct ofpbuf *
-make_packet_in(uint32_t buffer_id, uint16_t in_port, uint8_t reason,
- const struct ofpbuf *payload, int max_send_len)
-{
- struct ofp_packet_in *opi;
- struct ofpbuf *buf;
- int send_len;
+ if (!msg->size) {
+ return EOF;
+ }
- send_len = MIN(max_send_len, payload->size);
- buf = ofpbuf_new(sizeof *opi + send_len);
- opi = put_openflow_xid(offsetof(struct ofp_packet_in, data),
- OFPT_PACKET_IN, 0, buf);
- opi->buffer_id = htonl(buffer_id);
- opi->total_len = htons(payload->size);
- opi->in_port = htons(in_port);
- opi->reason = reason;
- ofpbuf_put(buf, payload->data, send_len);
- update_openflow_length(buf);
+ if (msg->size < sizeof(struct nx_flow_update_header)) {
+ goto bad_len;
+ }
- return buf;
-}
+ nfuh = msg->data;
+ update->event = ntohs(nfuh->event);
+ length = ntohs(nfuh->length);
+ if (length > msg->size || length % 8) {
+ goto bad_len;
+ }
-struct ofpbuf *
-make_packet_out(const struct ofpbuf *packet, uint32_t buffer_id,
- uint16_t in_port,
- const struct ofp_action_header *actions, size_t n_actions)
-{
- size_t actions_len = n_actions * sizeof *actions;
- struct ofp_packet_out *opo;
- size_t size = sizeof *opo + actions_len + (packet ? packet->size : 0);
- struct ofpbuf *out = ofpbuf_new(size);
-
- opo = ofpbuf_put_uninit(out, sizeof *opo);
- opo->header.version = OFP_VERSION;
- opo->header.type = OFPT_PACKET_OUT;
- opo->header.length = htons(size);
- opo->header.xid = htonl(0);
- opo->buffer_id = htonl(buffer_id);
- opo->in_port = htons(in_port == ODPP_LOCAL ? OFPP_LOCAL : in_port);
- opo->actions_len = htons(actions_len);
- ofpbuf_put(out, actions, actions_len);
- if (packet) {
- ofpbuf_put(out, packet->data, packet->size);
- }
- return out;
-}
+ if (update->event == NXFME_ABBREV) {
+ struct nx_flow_update_abbrev *nfua;
-struct ofpbuf *
-make_unbuffered_packet_out(const struct ofpbuf *packet,
- uint16_t in_port, uint16_t out_port)
-{
- struct ofp_action_output action;
- action.type = htons(OFPAT_OUTPUT);
- action.len = htons(sizeof action);
- action.port = htons(out_port);
- return make_packet_out(packet, UINT32_MAX, in_port,
- (struct ofp_action_header *) &action, 1);
-}
+ if (length != sizeof *nfua) {
+ goto bad_len;
+ }
-struct ofpbuf *
-make_buffered_packet_out(uint32_t buffer_id,
- uint16_t in_port, uint16_t out_port)
-{
- if (out_port != OFPP_NONE) {
- struct ofp_action_output action;
- action.type = htons(OFPAT_OUTPUT);
- action.len = htons(sizeof action);
- action.port = htons(out_port);
- return make_packet_out(NULL, buffer_id, in_port,
- (struct ofp_action_header *) &action, 1);
+ nfua = ofpbuf_pull(msg, sizeof *nfua);
+ update->xid = nfua->xid;
+ return 0;
+ } else if (update->event == NXFME_ADDED
+ || update->event == NXFME_DELETED
+ || update->event == NXFME_MODIFIED) {
+ struct nx_flow_update_full *nfuf;
+ unsigned int actions_len;
+ unsigned int match_len;
+ enum ofperr error;
+
+ if (length < sizeof *nfuf) {
+ goto bad_len;
+ }
+
+ nfuf = ofpbuf_pull(msg, sizeof *nfuf);
+ match_len = ntohs(nfuf->match_len);
+ if (sizeof *nfuf + match_len > length) {
+ goto bad_len;
+ }
+
+ update->reason = ntohs(nfuf->reason);
+ update->idle_timeout = ntohs(nfuf->idle_timeout);
+ update->hard_timeout = ntohs(nfuf->hard_timeout);
+ update->table_id = nfuf->table_id;
+ update->cookie = nfuf->cookie;
+ update->priority = ntohs(nfuf->priority);
+
+ error = nx_pull_match(msg, match_len, update->match, NULL, NULL);
+ if (error) {
+ return error;
+ }
+
+ actions_len = length - sizeof *nfuf - ROUND_UP(match_len, 8);
+ error = ofpacts_pull_openflow10(msg, actions_len, ofpacts);
+ if (error) {
+ return error;
+ }
+
+ update->ofpacts = ofpacts->data;
+ update->ofpacts_len = ofpacts->size;
+ return 0;
} else {
- return make_packet_out(NULL, buffer_id, in_port, NULL, 0);
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "NXST_FLOW_MONITOR reply has bad event %"PRIu16,
+ ntohs(nfuh->event));
+ return OFPERR_OFPET_BAD_REQUEST;
}
+
+bad_len:
+ VLOG_WARN_RL(&bad_ofmsg_rl, "NXST_FLOW_MONITOR reply has %zu "
+ "leftover bytes at end", msg->size);
+ return OFPERR_OFPBRC_BAD_LEN;
}
-/* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
-struct ofpbuf *
-make_echo_request(void)
+uint32_t
+ofputil_decode_flow_monitor_cancel(const struct ofp_header *oh)
{
- struct ofp_header *rq;
- struct ofpbuf *out = ofpbuf_new(sizeof *rq);
- rq = ofpbuf_put_uninit(out, sizeof *rq);
- rq->version = OFP_VERSION;
- rq->type = OFPT_ECHO_REQUEST;
- rq->length = htons(sizeof *rq);
- rq->xid = 0;
- return out;
+ const struct nx_flow_monitor_cancel *cancel = ofpmsg_body(oh);
+
+ return ntohl(cancel->id);
}
-/* Creates and returns an OFPT_ECHO_REPLY message matching the
- * OFPT_ECHO_REQUEST message in 'rq'. */
struct ofpbuf *
-make_echo_reply(const struct ofp_header *rq)
+ofputil_encode_flow_monitor_cancel(uint32_t id)
{
- size_t size = ntohs(rq->length);
- struct ofpbuf *out = ofpbuf_new(size);
- struct ofp_header *reply = ofpbuf_put(out, rq, size);
- reply->type = OFPT_ECHO_REPLY;
- return out;
+ struct nx_flow_monitor_cancel *nfmc;
+ struct ofpbuf *msg;
+
+ msg = ofpraw_alloc(OFPRAW_NXT_FLOW_MONITOR_CANCEL, OFP10_VERSION, 0);
+ nfmc = ofpbuf_put_uninit(msg, sizeof *nfmc);
+ nfmc->id = htonl(id);
+ return msg;
}
-static int
-check_message_type(uint8_t got_type, uint8_t want_type)
+void
+ofputil_start_flow_update(struct list *replies)
{
- if (got_type != want_type) {
- char *want_type_name = ofp_message_type_to_string(want_type);
- char *got_type_name = ofp_message_type_to_string(got_type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received bad message type %s (expected %s)",
- got_type_name, want_type_name);
- free(want_type_name);
- free(got_type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
- }
- return 0;
+ struct ofpbuf *msg;
+
+ msg = ofpraw_alloc_xid(OFPRAW_NXST_FLOW_MONITOR_REPLY, OFP10_VERSION,
+ htonl(0), 1024);
+
+ list_init(replies);
+ list_push_back(replies, &msg->list_node);
}
-/* Checks that 'msg' has type 'type' and that it is exactly 'size' bytes long.
- * Returns 0 if the checks pass, otherwise an OpenFlow error code (produced
- * with ofp_mkerr()). */
-int
-check_ofp_message(const struct ofp_header *msg, uint8_t type, size_t size)
+void
+ofputil_append_flow_update(const struct ofputil_flow_update *update,
+ struct list *replies)
{
- size_t got_size;
- int error;
+ struct nx_flow_update_header *nfuh;
+ struct ofpbuf *msg;
+ size_t start_ofs;
- error = check_message_type(msg->type, type);
- if (error) {
- return error;
- }
+ msg = ofpbuf_from_list(list_back(replies));
+ start_ofs = msg->size;
- got_size = ntohs(msg->length);
- if (got_size != size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received %s message of length %zu (expected %zu)",
- type_name, got_size, size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ if (update->event == NXFME_ABBREV) {
+ struct nx_flow_update_abbrev *nfua;
+
+ nfua = ofpbuf_put_zeros(msg, sizeof *nfua);
+ nfua->xid = update->xid;
+ } else {
+ struct nx_flow_update_full *nfuf;
+ int match_len;
+
+ ofpbuf_put_zeros(msg, sizeof *nfuf);
+ match_len = nx_put_match(msg, update->match, htonll(0), htonll(0));
+ ofpacts_put_openflow10(update->ofpacts, update->ofpacts_len, msg);
+
+ nfuf = ofpbuf_at_assert(msg, start_ofs, sizeof *nfuf);
+ nfuf->reason = htons(update->reason);
+ nfuf->priority = htons(update->priority);
+ nfuf->idle_timeout = htons(update->idle_timeout);
+ nfuf->hard_timeout = htons(update->hard_timeout);
+ nfuf->match_len = htons(match_len);
+ nfuf->table_id = update->table_id;
+ nfuf->cookie = update->cookie;
}
- return 0;
-}
+ nfuh = ofpbuf_at_assert(msg, start_ofs, sizeof *nfuh);
+ nfuh->length = htons(msg->size - start_ofs);
+ nfuh->event = htons(update->event);
-/* Checks that 'msg' has type 'type' and that 'msg' is 'size' plus a
- * nonnegative integer multiple of 'array_elt_size' bytes long. Returns 0 if
- * the checks pass, otherwise an OpenFlow error code (produced with
- * ofp_mkerr()).
- *
- * If 'n_array_elts' is nonnull, then '*n_array_elts' is set to the number of
- * 'array_elt_size' blocks in 'msg' past the first 'min_size' bytes, when
- * successful. */
-int
-check_ofp_message_array(const struct ofp_header *msg, uint8_t type,
- size_t min_size, size_t array_elt_size,
- size_t *n_array_elts)
+ ofpmp_postappend(replies, start_ofs);
+}
+\f
+struct ofpbuf *
+ofputil_encode_packet_out(const struct ofputil_packet_out *po,
+ enum ofputil_protocol protocol)
{
- size_t got_size;
- int error;
-
- assert(array_elt_size);
+ enum ofp_version ofp_version = ofputil_protocol_to_ofp_version(protocol);
+ struct ofpbuf *msg;
+ size_t size;
- error = check_message_type(msg->type, type);
- if (error) {
- return error;
+ size = po->ofpacts_len;
+ if (po->buffer_id == UINT32_MAX) {
+ size += po->packet_len;
}
- got_size = ntohs(msg->length);
- if (got_size < min_size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl, "received %s message of length %zu "
- "(expected at least %zu)",
- type_name, got_size, min_size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
- }
- if ((got_size - min_size) % array_elt_size) {
- char *type_name = ofp_message_type_to_string(type);
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "received %s message of bad length %zu: the "
- "excess over %zu (%zu) is not evenly divisible by %zu "
- "(remainder is %zu)",
- type_name, got_size, min_size, got_size - min_size,
- array_elt_size, (got_size - min_size) % array_elt_size);
- free(type_name);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ switch (ofp_version) {
+ case OFP10_VERSION: {
+ struct ofp_packet_out *opo;
+ size_t actions_ofs;
+
+ msg = ofpraw_alloc(OFPRAW_OFPT10_PACKET_OUT, OFP10_VERSION, size);
+ ofpbuf_put_zeros(msg, sizeof *opo);
+ actions_ofs = msg->size;
+ ofpacts_put_openflow10(po->ofpacts, po->ofpacts_len, msg);
+
+ opo = msg->l3;
+ opo->buffer_id = htonl(po->buffer_id);
+ opo->in_port = htons(po->in_port);
+ opo->actions_len = htons(msg->size - actions_ofs);
+ break;
}
- if (n_array_elts) {
- *n_array_elts = (got_size - min_size) / array_elt_size;
- }
- return 0;
-}
-int
-check_ofp_packet_out(const struct ofp_header *oh, struct ofpbuf *data,
- int *n_actionsp, int max_ports)
-{
- const struct ofp_packet_out *opo;
- unsigned int actions_len, n_actions;
- size_t extra;
- int error;
+ case OFP11_VERSION:
+ case OFP12_VERSION: {
+ struct ofp11_packet_out *opo;
+ size_t len;
- *n_actionsp = 0;
- error = check_ofp_message_array(oh, OFPT_PACKET_OUT,
- sizeof *opo, 1, &extra);
- if (error) {
- return error;
- }
- opo = (const struct ofp_packet_out *) oh;
+ msg = ofpraw_alloc(OFPRAW_OFPT11_PACKET_OUT, ofp_version, size);
+ ofpbuf_put_zeros(msg, sizeof *opo);
+ len = ofpacts_put_openflow11_actions(po->ofpacts, po->ofpacts_len, msg);
- actions_len = ntohs(opo->actions_len);
- if (actions_len > extra) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out claims %u bytes of actions "
- "but message has room for only %zu bytes",
- actions_len, extra);
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+ opo = msg->l3;
+ opo->buffer_id = htonl(po->buffer_id);
+ opo->in_port = ofputil_port_to_ofp11(po->in_port);
+ opo->actions_len = htons(len);
+ break;
}
- if (actions_len % sizeof(union ofp_action)) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "packet-out claims %u bytes of actions, "
- "which is not a multiple of %zu",
- actions_len, sizeof(union ofp_action));
- return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
+
+ default:
+ NOT_REACHED();
}
- n_actions = actions_len / sizeof(union ofp_action);
- error = validate_actions((const union ofp_action *) opo->actions,
- n_actions, max_ports);
- if (error) {
- return error;
+ if (po->buffer_id == UINT32_MAX) {
+ ofpbuf_put(msg, po->packet, po->packet_len);
}
- data->data = (void *) &opo->actions[n_actions];
- data->size = extra - actions_len;
- *n_actionsp = n_actions;
- return 0;
+ ofpmsg_update_length(msg);
+
+ return msg;
+}
+\f
+/* Creates and returns an OFPT_ECHO_REQUEST message with an empty payload. */
+struct ofpbuf *
+make_echo_request(enum ofp_version ofp_version)
+{
+ return ofpraw_alloc_xid(OFPRAW_OFPT_ECHO_REQUEST, ofp_version,
+ htonl(0), 0);
}
-const struct ofp_flow_stats *
-flow_stats_first(struct flow_stats_iterator *iter,
- const struct ofp_stats_reply *osr)
+/* Creates and returns an OFPT_ECHO_REPLY message matching the
+ * OFPT_ECHO_REQUEST message in 'rq'. */
+struct ofpbuf *
+make_echo_reply(const struct ofp_header *rq)
{
- iter->pos = osr->body;
- iter->end = osr->body + (ntohs(osr->header.length)
- - offsetof(struct ofp_stats_reply, body));
- return flow_stats_next(iter);
+ struct ofpbuf rq_buf;
+ struct ofpbuf *reply;
+
+ ofpbuf_use_const(&rq_buf, rq, ntohs(rq->length));
+ ofpraw_pull_assert(&rq_buf);
+
+ reply = ofpraw_alloc_reply(OFPRAW_OFPT_ECHO_REPLY, rq, rq_buf.size);
+ ofpbuf_put(reply, rq_buf.data, rq_buf.size);
+ return reply;
}
-const struct ofp_flow_stats *
-flow_stats_next(struct flow_stats_iterator *iter)
+struct ofpbuf *
+ofputil_encode_barrier_request(enum ofp_version ofp_version)
{
- ptrdiff_t bytes_left = iter->end - iter->pos;
- const struct ofp_flow_stats *fs;
- size_t length;
+ enum ofpraw type;
- if (bytes_left < sizeof *fs) {
- if (bytes_left != 0) {
- VLOG_WARN_RL(&bad_ofmsg_rl,
- "%td leftover bytes in flow stats reply", bytes_left);
- }
- return NULL;
+ switch (ofp_version) {
+ case OFP12_VERSION:
+ case OFP11_VERSION:
+ type = OFPRAW_OFPT11_BARRIER_REQUEST;
+ break;
+
+ case OFP10_VERSION:
+ type = OFPRAW_OFPT10_BARRIER_REQUEST;
+ break;
+
+ default:
+ NOT_REACHED();
}
- fs = (const void *) iter->pos;
- length = ntohs(fs->length);
- if (length < sizeof *fs) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu is shorter than "
- "min %zu", length, sizeof *fs);
- return NULL;
- } else if (length > bytes_left) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu but only %td "
- "bytes left", length, bytes_left);
- return NULL;
- } else if ((length - sizeof *fs) % sizeof fs->actions[0]) {
- VLOG_WARN_RL(&bad_ofmsg_rl, "flow stats length %zu has %zu bytes "
- "left over in final action", length,
- (length - sizeof *fs) % sizeof fs->actions[0]);
- return NULL;
+ return ofpraw_alloc(type, ofp_version, 0);
+}
+
+const char *
+ofputil_frag_handling_to_string(enum ofp_config_flags flags)
+{
+ switch (flags & OFPC_FRAG_MASK) {
+ case OFPC_FRAG_NORMAL: return "normal";
+ case OFPC_FRAG_DROP: return "drop";
+ case OFPC_FRAG_REASM: return "reassemble";
+ case OFPC_FRAG_NX_MATCH: return "nx-match";
}
- iter->pos += length;
- return fs;
+
+ NOT_REACHED();
}
-/* Alignment of ofp_actions. */
-#define ACTION_ALIGNMENT 8
+bool
+ofputil_frag_handling_from_string(const char *s, enum ofp_config_flags *flags)
+{
+ if (!strcasecmp(s, "normal")) {
+ *flags = OFPC_FRAG_NORMAL;
+ } else if (!strcasecmp(s, "drop")) {
+ *flags = OFPC_FRAG_DROP;
+ } else if (!strcasecmp(s, "reassemble")) {
+ *flags = OFPC_FRAG_REASM;
+ } else if (!strcasecmp(s, "nx-match")) {
+ *flags = OFPC_FRAG_NX_MATCH;
+ } else {
+ return false;
+ }
+ return true;
+}
-static int
-check_action_exact_len(const union ofp_action *a, unsigned int len,
- unsigned int required_len)
+/* Converts the OpenFlow 1.1+ port number 'ofp11_port' into an OpenFlow 1.0
+ * port number and stores the latter in '*ofp10_port', for the purpose of
+ * decoding OpenFlow 1.1+ protocol messages. Returns 0 if successful,
+ * otherwise an OFPERR_* number.
+ *
+ * See the definition of OFP11_MAX for an explanation of the mapping. */
+enum ofperr
+ofputil_port_from_ofp11(ovs_be32 ofp11_port, uint16_t *ofp10_port)
{
- if (len != required_len) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "action %u has invalid length %"PRIu16" (must be %u)\n",
- a->type, ntohs(a->header.len), required_len);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ uint32_t ofp11_port_h = ntohl(ofp11_port);
+
+ if (ofp11_port_h < OFPP_MAX) {
+ *ofp10_port = ofp11_port_h;
+ return 0;
+ } else if (ofp11_port_h >= OFPP11_MAX) {
+ *ofp10_port = ofp11_port_h - OFPP11_OFFSET;
+ return 0;
+ } else {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "port %"PRIu32" is outside the supported "
+ "range 0 through %d or 0x%"PRIx32" through 0x%"PRIx32,
+ ofp11_port_h, OFPP_MAX - 1,
+ (uint32_t) OFPP11_MAX, UINT32_MAX);
+ return OFPERR_OFPBAC_BAD_OUT_PORT;
}
- return 0;
}
-/* Checks that 'port' is a valid output port for the OFPAT_OUTPUT action, given
+/* Returns the OpenFlow 1.1+ port number equivalent to the OpenFlow 1.0 port
+ * number 'ofp10_port', for encoding OpenFlow 1.1+ protocol messages.
+ *
+ * See the definition of OFP11_MAX for an explanation of the mapping. */
+ovs_be32
+ofputil_port_to_ofp11(uint16_t ofp10_port)
+{
+ return htonl(ofp10_port < OFPP_MAX
+ ? ofp10_port
+ : ofp10_port + OFPP11_OFFSET);
+}
+
+/* Checks that 'port' is a valid output port for the OFPAT10_OUTPUT action, given
* that the switch will never have more than 'max_ports' ports. Returns 0 if
- * 'port' is valid, otherwise an ofp_mkerr() return code. */
-static int
-check_output_port(uint16_t port, int max_ports)
+ * 'port' is valid, otherwise an OpenFlow return code. */
+enum ofperr
+ofputil_check_output_port(uint16_t port, int max_ports)
{
switch (port) {
case OFPP_IN_PORT:
case OFPP_FLOOD:
case OFPP_ALL:
case OFPP_CONTROLLER:
+ case OFPP_NONE:
case OFPP_LOCAL:
return 0;
if (port < max_ports) {
return 0;
}
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown output port %x", port);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
+ return OFPERR_OFPBAC_BAD_OUT_PORT;
}
}
-/* Checks that 'action' is a valid OFPAT_ENQUEUE action, given that the switch
- * will never have more than 'max_ports' ports. Returns 0 if 'port' is valid,
- * otherwise an ofp_mkerr() return code. */
-static int
-check_enqueue_action(const union ofp_action *a, unsigned int len,
- int max_ports)
+#define OFPUTIL_NAMED_PORTS \
+ OFPUTIL_NAMED_PORT(IN_PORT) \
+ OFPUTIL_NAMED_PORT(TABLE) \
+ OFPUTIL_NAMED_PORT(NORMAL) \
+ OFPUTIL_NAMED_PORT(FLOOD) \
+ OFPUTIL_NAMED_PORT(ALL) \
+ OFPUTIL_NAMED_PORT(CONTROLLER) \
+ OFPUTIL_NAMED_PORT(LOCAL) \
+ OFPUTIL_NAMED_PORT(NONE)
+
+/* Returns the port number represented by 's', which may be an integer or, for
+ * reserved ports, the standard OpenFlow name for the port (e.g. "LOCAL").
+ *
+ * Returns 0 if 's' is not a valid OpenFlow port number or name. The caller
+ * should issue an error message in this case, because this function usually
+ * does not. (This gives the caller an opportunity to look up the port name
+ * another way, e.g. by contacting the switch and listing the names of all its
+ * ports).
+ *
+ * This function accepts OpenFlow 1.0 port numbers. It also accepts a subset
+ * of OpenFlow 1.1+ port numbers, mapping those port numbers into the 16-bit
+ * range as described in include/openflow/openflow-1.1.h. */
+uint16_t
+ofputil_port_from_string(const char *s)
{
- const struct ofp_action_enqueue *oae;
- uint16_t port;
- int error;
-
- error = check_action_exact_len(a, len, 16);
- if (error) {
- return error;
- }
+ unsigned int port32;
- oae = (const struct ofp_action_enqueue *) a;
- port = ntohs(oae->port);
- if (port < max_ports || port == OFPP_IN_PORT) {
+ if (str_to_uint(s, 10, &port32)) {
+ if (port32 == 0) {
+ VLOG_WARN("port 0 is not a valid OpenFlow port number");
+ return 0;
+ } else if (port32 < OFPP_MAX) {
+ return port32;
+ } else if (port32 < OFPP_FIRST_RESV) {
+ VLOG_WARN("port %u is a reserved OF1.0 port number that will "
+ "be translated to %u when talking to an OF1.1 or "
+ "later controller", port32, port32 + OFPP11_OFFSET);
+ return port32;
+ } else if (port32 <= OFPP_LAST_RESV) {
+ struct ds s;
+
+ ds_init(&s);
+ ofputil_format_port(port32, &s);
+ VLOG_WARN("port %u is better referred to as %s, for compatibility "
+ "with future versions of OpenFlow",
+ port32, ds_cstr(&s));
+ ds_destroy(&s);
+
+ return port32;
+ } else if (port32 < OFPP11_MAX) {
+ VLOG_WARN("port %u is outside the supported range 0 through "
+ "%"PRIx16"or 0x%x through 0x%"PRIx32, port32,
+ UINT16_MAX, (unsigned int) OFPP11_MAX, UINT32_MAX);
+ return 0;
+ } else {
+ return port32 - OFPP11_OFFSET;
+ }
+ } else {
+ struct pair {
+ const char *name;
+ uint16_t value;
+ };
+ static const struct pair pairs[] = {
+#define OFPUTIL_NAMED_PORT(NAME) {#NAME, OFPP_##NAME},
+ OFPUTIL_NAMED_PORTS
+#undef OFPUTIL_NAMED_PORT
+ };
+ const struct pair *p;
+
+ for (p = pairs; p < &pairs[ARRAY_SIZE(pairs)]; p++) {
+ if (!strcasecmp(s, p->name)) {
+ return p->value;
+ }
+ }
return 0;
}
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown enqueue port %x", port);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
}
-static int
-check_nicira_action(const union ofp_action *a, unsigned int len)
+/* Appends to 's' a string representation of the OpenFlow port number 'port'.
+ * Most ports' string representation is just the port number, but for special
+ * ports, e.g. OFPP_LOCAL, it is the name, e.g. "LOCAL". */
+void
+ofputil_format_port(uint16_t port, struct ds *s)
{
- const struct nx_action_header *nah;
+ const char *name;
+
+ switch (port) {
+#define OFPUTIL_NAMED_PORT(NAME) case OFPP_##NAME: name = #NAME; break;
+ OFPUTIL_NAMED_PORTS
+#undef OFPUTIL_NAMED_PORT
- if (len < 16) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "Nicira vendor action only %u bytes", len);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ default:
+ ds_put_format(s, "%"PRIu16, port);
+ return;
}
- nah = (const struct nx_action_header *) a;
+ ds_put_cstr(s, name);
+}
- switch (ntohs(nah->subtype)) {
- case NXAST_RESUBMIT:
- case NXAST_SET_TUNNEL:
- case NXAST_DROP_SPOOFED_ARP:
- case NXAST_SET_QUEUE:
- case NXAST_POP_QUEUE:
- return check_action_exact_len(a, len, 16);
+/* Given a buffer 'b' that contains an array of OpenFlow ports of type
+ * 'ofp_version', tries to pull the first element from the array. If
+ * successful, initializes '*pp' with an abstract representation of the
+ * port and returns 0. If no ports remain to be decoded, returns EOF.
+ * On an error, returns a positive OFPERR_* value. */
+int
+ofputil_pull_phy_port(enum ofp_version ofp_version, struct ofpbuf *b,
+ struct ofputil_phy_port *pp)
+{
+ switch (ofp_version) {
+ case OFP10_VERSION: {
+ const struct ofp10_phy_port *opp = ofpbuf_try_pull(b, sizeof *opp);
+ return opp ? ofputil_decode_ofp10_phy_port(pp, opp) : EOF;
+ }
+ case OFP11_VERSION:
+ case OFP12_VERSION: {
+ const struct ofp11_port *op = ofpbuf_try_pull(b, sizeof *op);
+ return op ? ofputil_decode_ofp11_port(pp, op) : EOF;
+ }
default:
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR_TYPE);
+ NOT_REACHED();
}
}
-static int
-check_action(const union ofp_action *a, unsigned int len, int max_ports)
+/* Given a buffer 'b' that contains an array of OpenFlow ports of type
+ * 'ofp_version', returns the number of elements. */
+size_t ofputil_count_phy_ports(uint8_t ofp_version, struct ofpbuf *b)
{
- int error;
+ return b->size / ofputil_get_phy_port_size(ofp_version);
+}
- switch (ntohs(a->type)) {
- case OFPAT_OUTPUT:
- error = check_action_exact_len(a, len, 8);
- if (error) {
- return error;
+/* Returns the 'enum ofputil_action_code' corresponding to 'name' (e.g. if
+ * 'name' is "output" then the return value is OFPUTIL_OFPAT10_OUTPUT), or -1 if
+ * 'name' is not the name of any action.
+ *
+ * ofp-util.def lists the mapping from names to action. */
+int
+ofputil_action_code_from_name(const char *name)
+{
+ static const char *names[OFPUTIL_N_ACTIONS] = {
+ NULL,
+#define OFPAT10_ACTION(ENUM, STRUCT, NAME) NAME,
+#define OFPAT11_ACTION(ENUM, STRUCT, NAME) NAME,
+#define OFPAT12_ACTION(ENUM, STRUCT, NAME) NAME,
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) NAME,
+#include "ofp-util.def"
+ };
+
+ const char **p;
+
+ for (p = names; p < &names[ARRAY_SIZE(names)]; p++) {
+ if (*p && !strcasecmp(name, *p)) {
+ return p - names;
}
- return check_output_port(ntohs(a->output.port), max_ports);
-
- case OFPAT_SET_VLAN_VID:
- case OFPAT_SET_VLAN_PCP:
- case OFPAT_STRIP_VLAN:
- case OFPAT_SET_NW_SRC:
- case OFPAT_SET_NW_DST:
- case OFPAT_SET_NW_TOS:
- case OFPAT_SET_TP_SRC:
- case OFPAT_SET_TP_DST:
- return check_action_exact_len(a, len, 8);
-
- case OFPAT_SET_DL_SRC:
- case OFPAT_SET_DL_DST:
- return check_action_exact_len(a, len, 16);
-
- case OFPAT_VENDOR:
- return (a->vendor.vendor == htonl(NX_VENDOR_ID)
- ? check_nicira_action(a, len)
- : ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR));
-
- case OFPAT_ENQUEUE:
- return check_enqueue_action(a, len, max_ports);
+ }
+ return -1;
+}
- default:
- VLOG_WARN_RL(&bad_ofmsg_rl, "unknown action type %"PRIu16,
- ntohs(a->type));
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_TYPE);
+/* Appends an action of the type specified by 'code' to 'buf' and returns the
+ * action. Initializes the parts of 'action' that identify it as having type
+ * <ENUM> and length 'sizeof *action' and zeros the rest. For actions that
+ * have variable length, the length used and cleared is that of struct
+ * <STRUCT>. */
+void *
+ofputil_put_action(enum ofputil_action_code code, struct ofpbuf *buf)
+{
+ switch (code) {
+ case OFPUTIL_ACTION_INVALID:
+ NOT_REACHED();
+
+#define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
+ case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
+#define OFPAT11_ACTION OFPAT10_ACTION
+#define OFPAT12_ACTION OFPAT10_ACTION
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
+ case OFPUTIL_##ENUM: return ofputil_put_##ENUM(buf);
+#include "ofp-util.def"
}
+ NOT_REACHED();
}
-int
-validate_actions(const union ofp_action *actions, size_t n_actions,
- int max_ports)
+#define OFPAT10_ACTION(ENUM, STRUCT, NAME) \
+ void \
+ ofputil_init_##ENUM(struct STRUCT *s) \
+ { \
+ memset(s, 0, sizeof *s); \
+ s->type = htons(ENUM); \
+ s->len = htons(sizeof *s); \
+ } \
+ \
+ struct STRUCT * \
+ ofputil_put_##ENUM(struct ofpbuf *buf) \
+ { \
+ struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
+ ofputil_init_##ENUM(s); \
+ return s; \
+ }
+#define OFPAT11_ACTION OFPAT10_ACTION
+#define OFPAT12_ACTION OFPAT10_ACTION
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
+ void \
+ ofputil_init_##ENUM(struct STRUCT *s) \
+ { \
+ memset(s, 0, sizeof *s); \
+ s->type = htons(OFPAT10_VENDOR); \
+ s->len = htons(sizeof *s); \
+ s->vendor = htonl(NX_VENDOR_ID); \
+ s->subtype = htons(ENUM); \
+ } \
+ \
+ struct STRUCT * \
+ ofputil_put_##ENUM(struct ofpbuf *buf) \
+ { \
+ struct STRUCT *s = ofpbuf_put_uninit(buf, sizeof *s); \
+ ofputil_init_##ENUM(s); \
+ return s; \
+ }
+#include "ofp-util.def"
+
+static void
+ofputil_normalize_match__(struct match *match, bool may_log)
{
- const union ofp_action *a;
+ enum {
+ MAY_NW_ADDR = 1 << 0, /* nw_src, nw_dst */
+ MAY_TP_ADDR = 1 << 1, /* tp_src, tp_dst */
+ MAY_NW_PROTO = 1 << 2, /* nw_proto */
+ MAY_IPVx = 1 << 3, /* tos, frag, ttl */
+ MAY_ARP_SHA = 1 << 4, /* arp_sha */
+ MAY_ARP_THA = 1 << 5, /* arp_tha */
+ MAY_IPV6 = 1 << 6, /* ipv6_src, ipv6_dst, ipv6_label */
+ MAY_ND_TARGET = 1 << 7 /* nd_target */
+ } may_match;
+
+ struct flow_wildcards wc;
+
+ /* Figure out what fields may be matched. */
+ if (match->flow.dl_type == htons(ETH_TYPE_IP)) {
+ may_match = MAY_NW_PROTO | MAY_IPVx | MAY_NW_ADDR;
+ if (match->flow.nw_proto == IPPROTO_TCP ||
+ match->flow.nw_proto == IPPROTO_UDP ||
+ match->flow.nw_proto == IPPROTO_ICMP) {
+ may_match |= MAY_TP_ADDR;
+ }
+ } else if (match->flow.dl_type == htons(ETH_TYPE_IPV6)) {
+ may_match = MAY_NW_PROTO | MAY_IPVx | MAY_IPV6;
+ if (match->flow.nw_proto == IPPROTO_TCP ||
+ match->flow.nw_proto == IPPROTO_UDP) {
+ may_match |= MAY_TP_ADDR;
+ } else if (match->flow.nw_proto == IPPROTO_ICMPV6) {
+ may_match |= MAY_TP_ADDR;
+ if (match->flow.tp_src == htons(ND_NEIGHBOR_SOLICIT)) {
+ may_match |= MAY_ND_TARGET | MAY_ARP_SHA;
+ } else if (match->flow.tp_src == htons(ND_NEIGHBOR_ADVERT)) {
+ may_match |= MAY_ND_TARGET | MAY_ARP_THA;
+ }
+ }
+ } else if (match->flow.dl_type == htons(ETH_TYPE_ARP)) {
+ may_match = MAY_NW_PROTO | MAY_NW_ADDR | MAY_ARP_SHA | MAY_ARP_THA;
+ } else {
+ may_match = 0;
+ }
- for (a = actions; a < &actions[n_actions]; ) {
- unsigned int len = ntohs(a->header.len);
- unsigned int n_slots = len / ACTION_ALIGNMENT;
- unsigned int slots_left = &actions[n_actions] - a;
- int error;
+ /* Clear the fields that may not be matched. */
+ wc = match->wc;
+ if (!(may_match & MAY_NW_ADDR)) {
+ wc.masks.nw_src = wc.masks.nw_dst = htonl(0);
+ }
+ if (!(may_match & MAY_TP_ADDR)) {
+ wc.masks.tp_src = wc.masks.tp_dst = htons(0);
+ }
+ if (!(may_match & MAY_NW_PROTO)) {
+ wc.masks.nw_proto = 0;
+ }
+ if (!(may_match & MAY_IPVx)) {
+ wc.masks.nw_tos = 0;
+ wc.masks.nw_ttl = 0;
+ }
+ if (!(may_match & MAY_ARP_SHA)) {
+ memset(wc.masks.arp_sha, 0, ETH_ADDR_LEN);
+ }
+ if (!(may_match & MAY_ARP_THA)) {
+ memset(wc.masks.arp_tha, 0, ETH_ADDR_LEN);
+ }
+ if (!(may_match & MAY_IPV6)) {
+ wc.masks.ipv6_src = wc.masks.ipv6_dst = in6addr_any;
+ wc.masks.ipv6_label = htonl(0);
+ }
+ if (!(may_match & MAY_ND_TARGET)) {
+ wc.masks.nd_target = in6addr_any;
+ }
- if (n_slots > slots_left) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "action requires %u slots but only %u remain",
- n_slots, slots_left);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- } else if (!len) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "action has invalid length 0");
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- } else if (len % ACTION_ALIGNMENT) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "action length %u is not a multiple "
- "of %d", len, ACTION_ALIGNMENT);
- return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
- }
-
- error = check_action(a, len, max_ports);
- if (error) {
- return error;
+ /* Log any changes. */
+ if (!flow_wildcards_equal(&wc, &match->wc)) {
+ bool log = may_log && !VLOG_DROP_INFO(&bad_ofmsg_rl);
+ char *pre = log ? match_to_string(match, OFP_DEFAULT_PRIORITY) : NULL;
+
+ match->wc = wc;
+ match_zero_wildcarded_fields(match);
+
+ if (log) {
+ char *post = match_to_string(match, OFP_DEFAULT_PRIORITY);
+ VLOG_INFO("normalization changed ofp_match, details:");
+ VLOG_INFO(" pre: %s", pre);
+ VLOG_INFO("post: %s", post);
+ free(pre);
+ free(post);
}
- a += n_slots;
}
- return 0;
}
-/* Returns true if 'action' outputs to 'port' (which must be in network byte
- * order), false otherwise. */
-bool
-action_outputs_to_port(const union ofp_action *action, uint16_t port)
+/* "Normalizes" the wildcards in 'match'. That means:
+ *
+ * 1. If the type of level N is known, then only the valid fields for that
+ * level may be specified. For example, ARP does not have a TOS field,
+ * so nw_tos must be wildcarded if 'match' specifies an ARP flow.
+ * Similarly, IPv4 does not have any IPv6 addresses, so ipv6_src and
+ * ipv6_dst (and other fields) must be wildcarded if 'match' specifies an
+ * IPv4 flow.
+ *
+ * 2. If the type of level N is not known (or not understood by Open
+ * vSwitch), then no fields at all for that level may be specified. For
+ * example, Open vSwitch does not understand SCTP, an L4 protocol, so the
+ * L4 fields tp_src and tp_dst must be wildcarded if 'match' specifies an
+ * SCTP flow.
+ *
+ * If this function changes 'match', it logs a rate-limited informational
+ * message. */
+void
+ofputil_normalize_match(struct match *match)
{
- switch (ntohs(action->type)) {
- case OFPAT_OUTPUT:
- return action->output.port == port;
- case OFPAT_ENQUEUE:
- return ((const struct ofp_action_enqueue *) action)->port == port;
- default:
- return false;
- }
+ ofputil_normalize_match__(match, true);
}
-/* The set of actions must either come from a trusted source or have been
- * previously validated with validate_actions(). */
-const union ofp_action *
-actions_first(struct actions_iterator *iter,
- const union ofp_action *oa, size_t n_actions)
+/* Same as ofputil_normalize_match() without the logging. Thus, this function
+ * is suitable for a program's internal use, whereas ofputil_normalize_match()
+ * sense for use on flows received from elsewhere (so that a bug in the program
+ * that sent them can be reported and corrected). */
+void
+ofputil_normalize_match_quiet(struct match *match)
{
- iter->pos = oa;
- iter->end = oa + n_actions;
- return actions_next(iter);
+ ofputil_normalize_match__(match, false);
}
-const union ofp_action *
-actions_next(struct actions_iterator *iter)
+/* Parses a key or a key-value pair from '*stringp'.
+ *
+ * On success: Stores the key into '*keyp'. Stores the value, if present, into
+ * '*valuep', otherwise an empty string. Advances '*stringp' past the end of
+ * the key-value pair, preparing it for another call. '*keyp' and '*valuep'
+ * are substrings of '*stringp' created by replacing some of its bytes by null
+ * terminators. Returns true.
+ *
+ * If '*stringp' is just white space or commas, sets '*keyp' and '*valuep' to
+ * NULL and returns false. */
+bool
+ofputil_parse_key_value(char **stringp, char **keyp, char **valuep)
{
- if (iter->pos < iter->end) {
- const union ofp_action *a = iter->pos;
- unsigned int len = ntohs(a->header.len);
- iter->pos += len / ACTION_ALIGNMENT;
- return a;
- } else {
- return NULL;
+ char *pos, *key, *value;
+ size_t key_len;
+
+ pos = *stringp;
+ pos += strspn(pos, ", \t\r\n");
+ if (*pos == '\0') {
+ *keyp = *valuep = NULL;
+ return false;
}
-}
-void
-normalize_match(struct ofp_match *m)
-{
- enum { OFPFW_NW = OFPFW_NW_SRC_MASK | OFPFW_NW_DST_MASK | OFPFW_NW_PROTO };
- enum { OFPFW_TP = OFPFW_TP_SRC | OFPFW_TP_DST };
- uint32_t wc;
-
- wc = ntohl(m->wildcards) & OVSFW_ALL;
- if (wc & OFPFW_DL_TYPE) {
- m->dl_type = 0;
-
- /* Can't sensibly match on network or transport headers if the
- * data link type is unknown. */
- wc |= OFPFW_NW | OFPFW_TP;
- m->nw_src = m->nw_dst = m->nw_proto = m->nw_tos = 0;
- m->tp_src = m->tp_dst = 0;
- } else if (m->dl_type == htons(ETH_TYPE_IP)) {
- if (wc & OFPFW_NW_PROTO) {
- m->nw_proto = 0;
-
- /* Can't sensibly match on transport headers if the network
- * protocol is unknown. */
- wc |= OFPFW_TP;
- m->tp_src = m->tp_dst = 0;
- } else if (m->nw_proto == IPPROTO_TCP ||
- m->nw_proto == IPPROTO_UDP ||
- m->nw_proto == IPPROTO_ICMP) {
- if (wc & OFPFW_TP_SRC) {
- m->tp_src = 0;
- }
- if (wc & OFPFW_TP_DST) {
- m->tp_dst = 0;
+ key = pos;
+ key_len = strcspn(pos, ":=(, \t\r\n");
+ if (key[key_len] == ':' || key[key_len] == '=') {
+ /* The value can be separated by a colon. */
+ size_t value_len;
+
+ value = key + key_len + 1;
+ value_len = strcspn(value, ", \t\r\n");
+ pos = value + value_len + (value[value_len] != '\0');
+ value[value_len] = '\0';
+ } else if (key[key_len] == '(') {
+ /* The value can be surrounded by balanced parentheses. The outermost
+ * set of parentheses is removed. */
+ int level = 1;
+ size_t value_len;
+
+ value = key + key_len + 1;
+ for (value_len = 0; level > 0; value_len++) {
+ switch (value[value_len]) {
+ case '\0':
+ level = 0;
+ break;
+
+ case '(':
+ level++;
+ break;
+
+ case ')':
+ level--;
+ break;
}
- } else {
- /* Transport layer fields will always be extracted as zeros, so we
- * can do an exact-match on those values. */
- wc &= ~OFPFW_TP;
- m->tp_src = m->tp_dst = 0;
- }
- if (wc & OFPFW_NW_SRC_MASK) {
- m->nw_src &= flow_nw_bits_to_mask(wc, OFPFW_NW_SRC_SHIFT);
- }
- if (wc & OFPFW_NW_DST_MASK) {
- m->nw_dst &= flow_nw_bits_to_mask(wc, OFPFW_NW_DST_SHIFT);
- }
- if (wc & OFPFW_NW_TOS) {
- m->nw_tos = 0;
- } else {
- m->nw_tos &= IP_DSCP_MASK;
- }
- } else if (m->dl_type == htons(ETH_TYPE_ARP)) {
- if (wc & OFPFW_NW_PROTO) {
- m->nw_proto = 0;
}
- if (wc & OFPFW_NW_SRC_MASK) {
- m->nw_src &= flow_nw_bits_to_mask(wc, OFPFW_NW_SRC_SHIFT);
- }
- if (wc & OFPFW_NW_DST_MASK) {
- m->nw_dst &= flow_nw_bits_to_mask(wc, OFPFW_NW_DST_SHIFT);
- }
- m->tp_src = m->tp_dst = m->nw_tos = 0;
+ value[value_len - 1] = '\0';
+ pos = value + value_len;
} else {
- /* Network and transport layer fields will always be extracted as
- * zeros, so we can do an exact-match on those values. */
- wc &= ~(OFPFW_NW | OFPFW_TP);
- m->nw_proto = m->nw_src = m->nw_dst = m->nw_tos = 0;
- m->tp_src = m->tp_dst = 0;
- }
- if (wc & OFPFW_DL_SRC) {
- memset(m->dl_src, 0, sizeof m->dl_src);
- }
- if (wc & OFPFW_DL_DST) {
- memset(m->dl_dst, 0, sizeof m->dl_dst);
+ /* There might be no value at all. */
+ value = key + key_len; /* Will become the empty string below. */
+ pos = key + key_len + (key[key_len] != '\0');
}
- m->wildcards = htonl(wc);
-}
+ key[key_len] = '\0';
-/* Returns a string that describes 'match' in a very literal way, without
- * interpreting its contents except in a very basic fashion. The returned
- * string is intended to be fixed-length, so that it is easy to see differences
- * between two such strings if one is put above another. This is useful for
- * describing changes made by normalize_match().
- *
- * The caller must free the returned string (with free()). */
-char *
-ofp_match_to_literal_string(const struct ofp_match *match)
-{
- return xasprintf("wildcards=%#10"PRIx32" "
- " in_port=%5"PRId16" "
- " dl_src="ETH_ADDR_FMT" "
- " dl_dst="ETH_ADDR_FMT" "
- " dl_vlan=%5"PRId16" "
- " dl_vlan_pcp=%3"PRId8" "
- " dl_type=%#6"PRIx16" "
- " nw_tos=%#4"PRIx8" "
- " nw_proto=%#4"PRIx16" "
- " nw_src=%#10"PRIx32" "
- " nw_dst=%#10"PRIx32" "
- " tp_src=%5"PRId16" "
- " tp_dst=%5"PRId16,
- ntohl(match->wildcards),
- ntohs(match->in_port),
- ETH_ADDR_ARGS(match->dl_src),
- ETH_ADDR_ARGS(match->dl_dst),
- ntohs(match->dl_vlan),
- match->dl_vlan_pcp,
- ntohs(match->dl_type),
- match->nw_tos,
- match->nw_proto,
- ntohl(match->nw_src),
- ntohl(match->nw_dst),
- ntohs(match->tp_src),
- ntohs(match->tp_dst));
+ *stringp = pos;
+ *keyp = key;
+ *valuep = value;
+ return true;
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff