/*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <config.h>
#include "ofp-print.h"
+#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include "byte-order.h"
#include "classifier.h"
+#include "dynamic-string.h"
+#include "multipath.h"
#include "nx-match.h"
+#include "ofp-errors.h"
#include "ofp-util.h"
#include "ofpbuf.h"
#include "packets.h"
#include "random.h"
+#include "unaligned.h"
#include "type-props.h"
#include "vlog.h"
/* Initialize most of rule->wc. */
flow_wildcards_init_catchall(wc);
wc->wildcards = ofpfw & WC_INVARIANTS;
+
+ /* Wildcard fields that aren't defined by ofp_match or tun_id. */
+ wc->wildcards |= (FWW_ARP_SHA | FWW_ARP_THA | FWW_ND_TARGET);
+
if (ofpfw & OFPFW_NW_TOS) {
wc->wildcards |= FWW_NW_TOS;
}
if (flow_format == NXFF_TUN_ID_FROM_COOKIE && !(ofpfw & NXFW_TUN_ID)) {
rule->flow.tun_id = htonll(ntohll(cookie) >> 32);
- } else {
- wc->wildcards |= FWW_TUN_ID;
- rule->flow.tun_id = htonll(0);
}
if (ofpfw & OFPFW_DL_DST) {
rule->flow.nw_dst = match->nw_dst;
rule->flow.in_port = (match->in_port == htons(OFPP_LOCAL) ? ODPP_LOCAL
: ntohs(match->in_port));
- rule->flow.dl_type = match->dl_type;
+ rule->flow.dl_type = ofputil_dl_type_from_openflow(match->dl_type);
rule->flow.tp_src = match->tp_src;
rule->flow.tp_dst = match->tp_dst;
memcpy(rule->flow.dl_src, match->dl_src, ETH_ADDR_LEN);
/* Tunnel ID. */
if (flow_format == NXFF_TUN_ID_FROM_COOKIE) {
- if (wc->wildcards & FWW_TUN_ID) {
+ if (wc->tun_id_mask == htonll(0)) {
ofpfw |= NXFW_TUN_ID;
} else {
uint32_t cookie_lo = ntohll(cookie_in);
: rule->flow.in_port);
memcpy(match->dl_src, rule->flow.dl_src, ETH_ADDR_LEN);
memcpy(match->dl_dst, rule->flow.dl_dst, ETH_ADDR_LEN);
- match->dl_type = rule->flow.dl_type;
+ match->dl_type = ofputil_dl_type_to_openflow(rule->flow.dl_type);
match->nw_src = rule->flow.nw_src;
match->nw_dst = rule->flow.nw_dst;
match->nw_tos = rule->flow.nw_tos;
memset(match->pad2, '\0', sizeof match->pad2);
}
+/* Given a 'dl_type' value in the format used in struct flow, returns the
+ * corresponding 'dl_type' value for use in an OpenFlow ofp_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 OpenFlow ofp_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);
+}
+
/* Returns a transaction ID to use for an outgoing OpenFlow message. */
static ovs_be32
alloc_xid(void)
const struct ofputil_msg_type **typep)
{
static const struct ofputil_msg_type nxt_messages[] = {
- { OFPUTIL_NXT_STATUS_REQUEST,
- NXT_STATUS_REQUEST, "NXT_STATUS_REQUEST",
- sizeof(struct nicira_header), 1 },
-
- { OFPUTIL_NXT_STATUS_REPLY,
- NXT_STATUS_REPLY, "NXT_STATUS_REPLY",
- sizeof(struct nicira_header), 1 },
-
{ OFPUTIL_NXT_TUN_ID_FROM_COOKIE,
NXT_TUN_ID_FROM_COOKIE, "NXT_TUN_ID_FROM_COOKIE",
sizeof(struct nxt_tun_id_cookie), 0 },
return true;
}
+static inline bool
+is_nxm_required(const struct cls_rule *rule, bool cookie_support,
+ ovs_be64 cookie)
+{
+ const struct flow_wildcards *wc = &rule->wc;
+ uint32_t cookie_hi;
+ uint64_t tun_id;
+
+ /* Only NXM supports separately wildcards the Ethernet multicast bit. */
+ if (!(wc->wildcards & FWW_DL_DST) != !(wc->wildcards & FWW_ETH_MCAST)) {
+ return true;
+ }
+
+ /* Only NXM supports matching ARP hardware addresses. */
+ if (!(wc->wildcards & FWW_ARP_SHA) || !(wc->wildcards & FWW_ARP_THA)) {
+ return true;
+ }
+
+ /* Only NXM supports matching IPv6 traffic. */
+ if (!(wc->wildcards & FWW_DL_TYPE)
+ && (rule->flow.dl_type == htons(ETH_TYPE_IPV6))) {
+ return true;
+ }
+
+ /* Only NXM supports matching registers. */
+ if (!regs_fully_wildcarded(wc)) {
+ return true;
+ }
+
+ switch (wc->tun_id_mask) {
+ case CONSTANT_HTONLL(0):
+ /* Other formats can fully wildcard tun_id. */
+ break;
+
+ case CONSTANT_HTONLL(UINT64_MAX):
+ /* Only NXM supports tunnel ID matching without a cookie. */
+ if (!cookie_support) {
+ return true;
+ }
+
+ /* Only NXM supports 64-bit tunnel IDs. */
+ tun_id = ntohll(rule->flow.tun_id);
+ if (tun_id > UINT32_MAX) {
+ return true;
+ }
+
+ /* Only NXM supports a cookie whose top 32 bits conflict with the
+ * tunnel ID. */
+ cookie_hi = ntohll(cookie) >> 32;
+ if (cookie_hi && cookie_hi != tun_id) {
+ return true;
+ }
+ break;
+
+ default:
+ /* Only NXM supports partial matches on tunnel ID. */
+ return true;
+ }
+
+ /* Other formats can express this rule. */
+ return false;
+}
+
/* Returns the minimum nx_flow_format to use for sending 'rule' to a switch
* (e.g. to add or remove a flow). 'cookie_support' should be true if the
* command to be sent includes a flow cookie (as OFPT_FLOW_MOD does, for
ofputil_min_flow_format(const struct cls_rule *rule, bool cookie_support,
ovs_be64 cookie)
{
- const struct flow_wildcards *wc = &rule->wc;
- ovs_be32 cookie_hi = htonl(ntohll(cookie) >> 32);
-
- if (!(wc->wildcards & FWW_DL_DST) != !(wc->wildcards & FWW_ETH_MCAST)
- || !regs_fully_wildcarded(wc)
- || (!(wc->wildcards & FWW_TUN_ID)
- && (!cookie_support
- || (cookie_hi && cookie_hi != ntohll(rule->flow.tun_id))))) {
+ if (is_nxm_required(rule, cookie_support, cookie)) {
return NXFF_NXM;
- } else if (!(wc->wildcards & FWW_TUN_ID)) {
+ } else if (rule->wc.tun_id_mask != htonll(0)) {
return NXFF_TUN_ID_FROM_COOKIE;
} else {
return NXFF_OPENFLOW10;
}
/* Converts an OFPST_FLOW, OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE
- * message 'oh', received when the current flow format was 'flow_format', into
+ * request 'oh', received when the current flow format was 'flow_format', into
* an abstract flow_stats_request in 'fsr'. Returns 0 if successful, otherwise
* an OpenFlow error code.
*
}
/* Converts abstract flow_stats_request 'fsr' into an OFPST_FLOW,
- * OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE message 'oh' according to
+ * OFPST_AGGREGATE, NXST_FLOW, or NXST_AGGREGATE request 'oh' according to
* 'flow_format', and returns the message. */
struct ofpbuf *
ofputil_encode_flow_stats_request(const struct flow_stats_request *fsr,
return msg;
}
+/* Converts an OFPST_FLOW or NXST_FLOW reply in 'msg' into an abstract
+ * ofputil_flow_stats in 'fs'. For OFPST_FLOW messages, 'flow_format' should
+ * be the current flow format at the time when the request corresponding to the
+ * reply in 'msg' was sent. Otherwise 'flow_format' is ignored.
+ *
+ * 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.
+ *
+ * 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,
+ enum nx_flow_format flow_format)
+{
+ const struct ofputil_msg_type *type;
+ int code;
+
+ ofputil_decode_msg_type(msg->l2 ? msg->l2 : msg->data, &type);
+ code = ofputil_msg_type_code(type);
+ if (!msg->l2) {
+ msg->l2 = msg->data;
+ if (code == OFPUTIL_OFPST_FLOW_REPLY) {
+ ofpbuf_pull(msg, sizeof(struct ofp_stats_reply));
+ } else if (code == OFPUTIL_NXST_FLOW_REPLY) {
+ ofpbuf_pull(msg, sizeof(struct nicira_stats_msg));
+ } else {
+ NOT_REACHED();
+ }
+ }
+
+ if (!msg->size) {
+ return EOF;
+ } else if (code == OFPUTIL_OFPST_FLOW_REPLY) {
+ const struct ofp_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 (ofputil_pull_actions(msg, length - sizeof *ofs,
+ &fs->actions, &fs->n_actions)) {
+ return EINVAL;
+ }
+
+ fs->cookie = get_32aligned_be64(&ofs->cookie);
+ ofputil_cls_rule_from_match(&ofs->match, ntohs(ofs->priority),
+ flow_format, fs->cookie, &fs->rule);
+ 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->packet_count = ntohll(get_32aligned_be64(&ofs->packet_count));
+ fs->byte_count = ntohll(get_32aligned_be64(&ofs->byte_count));
+ } else if (code == OFPUTIL_NXST_FLOW_REPLY) {
+ const struct nx_flow_stats *nfs;
+ size_t match_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, ntohs(nfs->priority), &fs->rule)) {
+ return EINVAL;
+ }
+
+ if (ofputil_pull_actions(msg,
+ length - sizeof *nfs - ROUND_UP(match_len, 8),
+ &fs->actions, &fs->n_actions)) {
+ 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->idle_timeout = ntohs(nfs->idle_timeout);
+ fs->hard_timeout = ntohs(nfs->hard_timeout);
+ fs->packet_count = ntohll(nfs->packet_count);
+ fs->byte_count = ntohll(nfs->byte_count);
+ } else {
+ NOT_REACHED();
+ }
+
+ return 0;
+}
+
/* Converts an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message 'oh', received
* when the current flow format was 'flow_format', into an abstract
* ofputil_flow_removed in 'fr'. Returns 0 if successful, otherwise an
unsigned int required_len)
{
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);
+ VLOG_WARN_RL(&bad_ofmsg_rl, "action %"PRIu16" has invalid length "
+ "%"PRIu16" (must be %u)\n",
+ ntohs(a->type), ntohs(a->header.len), required_len);
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
+ }
+ return 0;
+}
+
+static int
+check_nx_action_exact_len(const struct nx_action_header *a,
+ unsigned int len, unsigned int required_len)
+{
+ if (len != required_len) {
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "Nicira action %"PRIu16" has invalid length %"PRIu16" "
+ "(must be %u)\n",
+ ntohs(a->subtype), ntohs(a->len), required_len);
return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
}
return 0;
int error;
if (len < 16) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "Nicira vendor action only %u bytes", len);
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "Nicira vendor action only %u bytes", len);
return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
}
nah = (const struct nx_action_header *) a;
case NXAST_DROP_SPOOFED_ARP:
case NXAST_SET_QUEUE:
case NXAST_POP_QUEUE:
- return check_action_exact_len(a, len, 16);
+ return check_nx_action_exact_len(nah, len, 16);
case NXAST_REG_MOVE:
- error = check_action_exact_len(a, len,
- sizeof(struct nx_action_reg_move));
+ error = check_nx_action_exact_len(nah, len,
+ sizeof(struct nx_action_reg_move));
if (error) {
return error;
}
return nxm_check_reg_move((const struct nx_action_reg_move *) a, flow);
case NXAST_REG_LOAD:
- error = check_action_exact_len(a, len,
- sizeof(struct nx_action_reg_load));
+ error = check_nx_action_exact_len(nah, len,
+ sizeof(struct nx_action_reg_load));
if (error) {
return error;
}
return 0;
case NXAST_SET_TUNNEL64:
- return check_action_exact_len(a, len,
- sizeof(struct nx_action_set_tunnel64));
+ return check_nx_action_exact_len(
+ nah, len, sizeof(struct nx_action_set_tunnel64));
+
+ case NXAST_MULTIPATH:
+ error = check_nx_action_exact_len(
+ nah, len, sizeof(struct nx_action_multipath));
+ if (error) {
+ return error;
+ }
+ return multipath_check((const struct nx_action_multipath *) a);
case NXAST_SNAT__OBSOLETE:
default:
+ VLOG_WARN_RL(&bad_ofmsg_rl,
+ "unknown Nicira vendor action subtype %"PRIu16,
+ ntohs(nah->subtype));
return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_VENDOR_TYPE);
}
}
int error;
if (n_slots > slots_left) {
- VLOG_DBG_RL(&bad_ofmsg_rl,
- "action requires %u slots but only %u remain",
- n_slots, slots_left);
+ VLOG_WARN_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");
+ VLOG_WARN_RL(&bad_ofmsg_rl, "action has invalid length 0");
return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
} else if (len % OFP_ACTION_ALIGN) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "action length %u is not a multiple "
- "of %d", len, OFP_ACTION_ALIGN);
+ VLOG_WARN_RL(&bad_ofmsg_rl, "action length %u is not a multiple "
+ "of %d", len, OFP_ACTION_ALIGN);
return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
}
m->nw_dst &= ofputil_wcbits_to_netmask(wc >> OFPFW_NW_DST_SHIFT);
}
m->tp_src = m->tp_dst = m->nw_tos = 0;
+ } else if (m->dl_type == htons(ETH_TYPE_IPV6)) {
+ /* Don't normalize IPv6 traffic, since OpenFlow doesn't have a
+ * way to express it. */
} else {
/* Network and transport layer fields will always be extracted as
* zeros, so we can do an exact-match on those values. */
}
}
+static int
+vendor_id_to_code(uint32_t id)
+{
+ switch (id) {
+#define OFPUTIL_VENDOR(NAME, VENDOR_ID) case VENDOR_ID: return NAME;
+ OFPUTIL_VENDORS
+#undef OFPUTIL_VENDOR
+ default:
+ return -1;
+ }
+}
+
/* Creates and returns an OpenFlow message of type OFPT_ERROR with the error
* information taken from 'error', whose encoding must be as described in the
* large comment in ofp-util.h. If 'oh' is nonnull, then the error will use
*
* Returns NULL if 'error' is not an OpenFlow error code. */
struct ofpbuf *
-make_ofp_error_msg(int error, const struct ofp_header *oh)
+ofputil_encode_error_msg(int error, const struct ofp_header *oh)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
return buf;
}
+/* Decodes 'oh', which should be an OpenFlow OFPT_ERROR message, and returns an
+ * Open vSwitch internal error code in the format described in the large
+ * comment in ofp-util.h.
+ *
+ * If 'payload_ofs' is nonnull, on success '*payload_ofs' is set to the offset
+ * to the payload starting from 'oh' and on failure it is set to 0. */
+int
+ofputil_decode_error_msg(const struct ofp_header *oh, size_t *payload_ofs)
+{
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+
+ const struct ofp_error_msg *oem;
+ uint16_t type, code;
+ struct ofpbuf b;
+ int vendor;
+
+ if (payload_ofs) {
+ *payload_ofs = 0;
+ }
+ if (oh->type != OFPT_ERROR) {
+ return EPROTO;
+ }
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+ oem = ofpbuf_try_pull(&b, sizeof *oem);
+ if (!oem) {
+ return EPROTO;
+ }
+
+ type = ntohs(oem->type);
+ code = ntohs(oem->code);
+ if (type == NXET_VENDOR && code == NXVC_VENDOR_ERROR) {
+ const struct nx_vendor_error *nve = ofpbuf_try_pull(&b, sizeof *nve);
+ if (!nve) {
+ return EPROTO;
+ }
+
+ vendor = vendor_id_to_code(ntohl(nve->vendor));
+ if (vendor < 0) {
+ VLOG_WARN_RL(&rl, "error contains unknown vendor ID %#"PRIx32,
+ ntohl(nve->vendor));
+ return EPROTO;
+ }
+ type = ntohs(nve->type);
+ code = ntohs(nve->code);
+ } else {
+ vendor = OFPUTIL_VENDOR_OPENFLOW;
+ }
+
+ if (type >= 1024) {
+ VLOG_WARN_RL(&rl, "error contains type %"PRIu16" greater than "
+ "supported maximum value 1023", type);
+ return EPROTO;
+ }
+
+ if (payload_ofs) {
+ *payload_ofs = (uint8_t *) b.data - (uint8_t *) oh;
+ }
+ return ofp_mkerr_vendor(vendor, type, code);
+}
+
+void
+ofputil_format_error(struct ds *s, int error)
+{
+ if (is_errno(error)) {
+ ds_put_cstr(s, strerror(error));
+ } else {
+ uint16_t type = get_ofp_err_type(error);
+ uint16_t code = get_ofp_err_code(error);
+ const char *type_s = ofp_error_type_to_string(type);
+ const char *code_s = ofp_error_code_to_string(type, code);
+
+ ds_put_format(s, "type ");
+ if (type_s) {
+ ds_put_cstr(s, type_s);
+ } else {
+ ds_put_format(s, "%"PRIu16, type);
+ }
+
+ ds_put_cstr(s, ", code ");
+ if (code_s) {
+ ds_put_cstr(s, code_s);
+ } else {
+ ds_put_format(s, "%"PRIu16, code);
+ }
+ }
+}
+
+char *
+ofputil_error_to_string(int error)
+{
+ struct ds s = DS_EMPTY_INITIALIZER;
+ ofputil_format_error(&s, error);
+ return ds_steal_cstr(&s);
+}
+
/* Attempts to pull 'actions_len' bytes from the front of 'b'. Returns 0 if
* successful, otherwise an OpenFlow error.
*
union ofp_action **actionsp, size_t *n_actionsp)
{
if (actions_len % OFP_ACTION_ALIGN != 0) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
- "is not a multiple of %d", actions_len, OFP_ACTION_ALIGN);
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
+ "is not a multiple of %d", actions_len, OFP_ACTION_ALIGN);
goto error;
}
*actionsp = ofpbuf_try_pull(b, actions_len);
if (*actionsp == NULL) {
- VLOG_DBG_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
- "exceeds remaining message length (%zu)",
- actions_len, b->size);
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OpenFlow message actions length %u "
+ "exceeds remaining message length (%zu)",
+ actions_len, b->size);
goto error;
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff