+ case OFPUTIL_NXAST_STACK_POP:
+ error = nxm_parse_stack_action(ofpact_put_STACK_POP(ofpacts), arg);
+ break;
+
+ case OFPUTIL_NXAST_SAMPLE:
+ error = parse_sample(ofpacts, arg);
+ break;
+ }
+
+ if (error) {
+ ofpacts->size = orig_size;
+ }
+ return error;
+}
+
+/* Parses action 'act', with argument 'arg', and appends a parsed version to
+ * 'ofpacts'.
+ *
+ * 'n_actions' specifies the number of actions already parsed (for proper
+ * handling of "drop" actions).
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+static char * WARN_UNUSED_RESULT
+str_to_ofpact__(char *pos, char *act, char *arg,
+ struct ofpbuf *ofpacts, int n_actions)
+{
+ int code = ofputil_action_code_from_name(act);
+ if (code >= 0) {
+ return parse_named_action(code, arg, ofpacts);
+ } else if (!strcasecmp(act, "drop")) {
+ if (n_actions) {
+ return xstrdup("Drop actions must not be preceded by other "
+ "actions");
+ } else if (ofputil_parse_key_value(&pos, &act, &arg)) {
+ return xstrdup("Drop actions must not be followed by other "
+ "actions");
+ }
+ } else {
+ ofp_port_t port;
+ if (ofputil_port_from_string(act, &port)) {
+ ofpact_put_OUTPUT(ofpacts)->port = port;
+ } else {
+ return xasprintf("Unknown action: %s", act);
+ }
+ }
+
+ return NULL;
+}
+
+/* Parses 'str' as a series of actions, and appends them to 'ofpacts'.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+static char * WARN_UNUSED_RESULT
+str_to_ofpacts(char *str, struct ofpbuf *ofpacts)
+{
+ size_t orig_size = ofpacts->size;
+ char *pos, *act, *arg;
+ enum ofperr error;
+ int n_actions;
+
+ pos = str;
+ n_actions = 0;
+ while (ofputil_parse_key_value(&pos, &act, &arg)) {
+ char *error = str_to_ofpact__(pos, act, arg, ofpacts, n_actions);
+ if (error) {
+ ofpacts->size = orig_size;
+ return error;
+ }
+ n_actions++;
+ }
+
+ error = ofpacts_verify(ofpacts->data, ofpacts->size);
+ if (error) {
+ ofpacts->size = orig_size;
+ return xstrdup("Incorrect action ordering");
+ }
+
+ ofpact_pad(ofpacts);
+ return NULL;
+}
+
+/* Parses 'arg' as the argument to instruction 'type', and appends such an
+ * instruction to 'ofpacts'.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+static char * WARN_UNUSED_RESULT
+parse_named_instruction(enum ovs_instruction_type type,
+ char *arg, struct ofpbuf *ofpacts)
+{
+ char *error_s = NULL;
+ enum ofperr error;
+
+ switch (type) {
+ case OVSINST_OFPIT11_APPLY_ACTIONS:
+ NOT_REACHED(); /* This case is handled by str_to_inst_ofpacts() */
+ break;
+
+ case OVSINST_OFPIT11_WRITE_ACTIONS:
+ /* XXX */
+ error_s = xstrdup("instruction write-actions is not supported yet");
+ break;
+
+ case OVSINST_OFPIT11_CLEAR_ACTIONS:
+ ofpact_put_CLEAR_ACTIONS(ofpacts);
+ break;
+
+ case OVSINST_OFPIT13_METER:
+ error_s = str_to_u32(arg, &ofpact_put_METER(ofpacts)->meter_id);
+ break;
+
+ case OVSINST_OFPIT11_WRITE_METADATA:
+ error_s = parse_metadata(ofpacts, arg);
+ break;
+
+ case OVSINST_OFPIT11_GOTO_TABLE: {
+ struct ofpact_goto_table *ogt = ofpact_put_GOTO_TABLE(ofpacts);
+ char *table_s = strsep(&arg, ",");
+ if (!table_s || !table_s[0]) {
+ return xstrdup("instruction goto-table needs table id");
+ }
+ error_s = str_to_u8(table_s, "table", &ogt->table_id);
+ break;
+ }
+ }
+
+ if (error_s) {
+ return error_s;
+ }
+
+ /* If write_metadata is specified as an action AND an instruction, ofpacts
+ could be invalid. */
+ error = ofpacts_verify(ofpacts->data, ofpacts->size);
+ if (error) {
+ return xstrdup("Incorrect instruction ordering");
+ }
+ return NULL;
+}
+
+/* Parses 'str' as a series of instructions, and appends them to 'ofpacts'.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+static char * WARN_UNUSED_RESULT
+str_to_inst_ofpacts(char *str, struct ofpbuf *ofpacts)
+{
+ size_t orig_size = ofpacts->size;
+ char *pos, *inst, *arg;
+ int type;
+ const char *prev_inst = NULL;
+ int prev_type = -1;
+ int n_actions = 0;
+
+ pos = str;
+ while (ofputil_parse_key_value(&pos, &inst, &arg)) {
+ type = ovs_instruction_type_from_name(inst);
+ if (type < 0) {
+ char *error = str_to_ofpact__(pos, inst, arg, ofpacts, n_actions);
+ if (error) {
+ ofpacts->size = orig_size;
+ return error;
+ }
+
+ type = OVSINST_OFPIT11_APPLY_ACTIONS;
+ if (prev_type == type) {
+ n_actions++;
+ continue;
+ }
+ } else if (type == OVSINST_OFPIT11_APPLY_ACTIONS) {
+ ofpacts->size = orig_size;
+ return xasprintf("%s isn't supported. Just write actions then "
+ "it is interpreted as apply_actions", inst);
+ } else {
+ char *error = parse_named_instruction(type, arg, ofpacts);
+ if (error) {
+ ofpacts->size = orig_size;
+ return error;
+ }
+ }
+
+ if (type <= prev_type) {
+ ofpacts->size = orig_size;
+ if (type == prev_type) {
+ return xasprintf("instruction %s may be specified only once",
+ inst);
+ } else {
+ return xasprintf("instruction %s must be specified before %s",
+ inst, prev_inst);
+ }
+ }
+
+ prev_inst = inst;
+ prev_type = type;
+ n_actions++;
+ }
+ ofpact_pad(ofpacts);
+
+ return NULL;
+}
+
+struct protocol {
+ const char *name;
+ uint16_t dl_type;
+ uint8_t nw_proto;
+};
+
+static bool
+parse_protocol(const char *name, const struct protocol **p_out)
+{
+ static const struct protocol protocols[] = {
+ { "ip", ETH_TYPE_IP, 0 },
+ { "arp", ETH_TYPE_ARP, 0 },
+ { "icmp", ETH_TYPE_IP, IPPROTO_ICMP },
+ { "tcp", ETH_TYPE_IP, IPPROTO_TCP },
+ { "udp", ETH_TYPE_IP, IPPROTO_UDP },
+ { "ipv6", ETH_TYPE_IPV6, 0 },
+ { "ip6", ETH_TYPE_IPV6, 0 },
+ { "icmp6", ETH_TYPE_IPV6, IPPROTO_ICMPV6 },
+ { "tcp6", ETH_TYPE_IPV6, IPPROTO_TCP },
+ { "udp6", ETH_TYPE_IPV6, IPPROTO_UDP },
+ { "rarp", ETH_TYPE_RARP, 0},
+ { "mpls", ETH_TYPE_MPLS, 0 },
+ { "mplsm", ETH_TYPE_MPLS_MCAST, 0 },
+ };
+ const struct protocol *p;
+
+ for (p = protocols; p < &protocols[ARRAY_SIZE(protocols)]; p++) {
+ if (!strcmp(p->name, name)) {
+ *p_out = p;
+ return true;
+ }
+ }
+ *p_out = NULL;
+ return false;
+}
+
+/* Parses 's' as the (possibly masked) value of field 'mf', and updates
+ * 'match' appropriately.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+static char * WARN_UNUSED_RESULT
+parse_field(const struct mf_field *mf, const char *s, struct match *match)
+{
+ union mf_value value, mask;
+ char *error;
+
+ error = mf_parse(mf, s, &value, &mask);
+ if (!error) {
+ mf_set(mf, &value, &mask, match);
+ }
+ return error;
+}
+
+static char * WARN_UNUSED_RESULT
+parse_ofp_str__(struct ofputil_flow_mod *fm, int command, char *string)
+{
+ enum {
+ F_OUT_PORT = 1 << 0,
+ F_ACTIONS = 1 << 1,
+ F_TIMEOUT = 1 << 3,
+ F_PRIORITY = 1 << 4,
+ F_FLAGS = 1 << 5,
+ } fields;
+ char *save_ptr = NULL;
+ char *act_str = NULL;
+ char *name;
+
+ switch (command) {
+ case -1:
+ fields = F_OUT_PORT;
+ break;
+
+ case OFPFC_ADD:
+ fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
+ break;
+
+ case OFPFC_DELETE:
+ fields = F_OUT_PORT;
+ break;
+
+ case OFPFC_DELETE_STRICT:
+ fields = F_OUT_PORT | F_PRIORITY;
+ break;
+
+ case OFPFC_MODIFY:
+ fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
+ break;
+
+ case OFPFC_MODIFY_STRICT:
+ fields = F_ACTIONS | F_TIMEOUT | F_PRIORITY | F_FLAGS;
+ break;
+
+ default:
+ NOT_REACHED();
+ }
+
+ match_init_catchall(&fm->match);
+ fm->priority = OFP_DEFAULT_PRIORITY;
+ fm->cookie = htonll(0);
+ fm->cookie_mask = htonll(0);
+ if (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT) {
+ /* For modify, by default, don't update the cookie. */
+ fm->new_cookie = htonll(UINT64_MAX);
+ } else{
+ fm->new_cookie = htonll(0);
+ }
+ fm->modify_cookie = false;
+ fm->table_id = 0xff;
+ fm->command = command;
+ fm->idle_timeout = OFP_FLOW_PERMANENT;
+ fm->hard_timeout = OFP_FLOW_PERMANENT;
+ fm->buffer_id = UINT32_MAX;
+ fm->out_port = OFPP_ANY;
+ fm->flags = 0;
+ if (fields & F_ACTIONS) {
+ act_str = strstr(string, "action");
+ if (!act_str) {
+ return xstrdup("must specify an action");
+ }
+ *act_str = '\0';
+
+ act_str = strchr(act_str + 1, '=');
+ if (!act_str) {
+ return xstrdup("must specify an action");
+ }
+
+ act_str++;
+ }
+ for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
+ name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
+ const struct protocol *p;
+ char *error = NULL;
+
+ if (parse_protocol(name, &p)) {
+ match_set_dl_type(&fm->match, htons(p->dl_type));
+ if (p->nw_proto) {
+ match_set_nw_proto(&fm->match, p->nw_proto);
+ }
+ } else if (fields & F_FLAGS && !strcmp(name, "send_flow_rem")) {
+ fm->flags |= OFPFF_SEND_FLOW_REM;
+ } else if (fields & F_FLAGS && !strcmp(name, "check_overlap")) {
+ fm->flags |= OFPFF_CHECK_OVERLAP;
+ } else if (fields & F_FLAGS && !strcmp(name, "reset_counts")) {
+ fm->flags |= OFPFF12_RESET_COUNTS;
+ } else if (fields & F_FLAGS && !strcmp(name, "no_packet_counts")) {
+ fm->flags |= OFPFF13_NO_PKT_COUNTS;
+ } else if (fields & F_FLAGS && !strcmp(name, "no_byte_counts")) {
+ fm->flags |= OFPFF13_NO_BYT_COUNTS;
+ } else {
+ char *value;
+
+ value = strtok_r(NULL, ", \t\r\n", &save_ptr);
+ if (!value) {
+ return xasprintf("field %s missing value", name);
+ }
+
+ if (!strcmp(name, "table")) {
+ error = str_to_u8(value, "table", &fm->table_id);
+ } else if (!strcmp(name, "out_port")) {
+ if (!ofputil_port_from_string(value, &fm->out_port)) {
+ error = xasprintf("%s is not a valid OpenFlow port",
+ value);
+ }
+ } else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
+ uint16_t priority;
+
+ error = str_to_u16(value, name, &priority);
+ fm->priority = priority;
+ } else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
+ error = str_to_u16(value, name, &fm->idle_timeout);
+ } else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
+ error = str_to_u16(value, name, &fm->hard_timeout);
+ } else if (!strcmp(name, "cookie")) {
+ char *mask = strchr(value, '/');
+
+ if (mask) {
+ /* A mask means we're searching for a cookie. */
+ if (command == OFPFC_ADD) {
+ return xstrdup("flow additions cannot use "
+ "a cookie mask");
+ }
+ *mask = '\0';
+ error = str_to_be64(value, &fm->cookie);
+ if (error) {
+ return error;
+ }
+ error = str_to_be64(mask + 1, &fm->cookie_mask);
+ } else {
+ /* No mask means that the cookie is being set. */
+ if (command != OFPFC_ADD && command != OFPFC_MODIFY
+ && command != OFPFC_MODIFY_STRICT) {
+ return xstrdup("cannot set cookie");
+ }
+ error = str_to_be64(value, &fm->new_cookie);
+ fm->modify_cookie = true;
+ }
+ } else if (mf_from_name(name)) {
+ error = parse_field(mf_from_name(name), value, &fm->match);
+ } else if (!strcmp(name, "duration")
+ || !strcmp(name, "n_packets")
+ || !strcmp(name, "n_bytes")
+ || !strcmp(name, "idle_age")
+ || !strcmp(name, "hard_age")) {
+ /* Ignore these, so that users can feed the output of
+ * "ovs-ofctl dump-flows" back into commands that parse
+ * flows. */
+ } else {
+ error = xasprintf("unknown keyword %s", name);
+ }
+
+ if (error) {
+ return error;
+ }
+ }
+ }
+ if (!fm->cookie_mask && fm->new_cookie == htonll(UINT64_MAX)
+ && (command == OFPFC_MODIFY || command == OFPFC_MODIFY_STRICT)) {
+ /* On modifies without a mask, we are supposed to add a flow if
+ * one does not exist. If a cookie wasn't been specified, use a
+ * default of zero. */
+ fm->new_cookie = htonll(0);
+ }
+ if (fields & F_ACTIONS) {
+ struct ofpbuf ofpacts;
+ char *error;
+
+ ofpbuf_init(&ofpacts, 32);
+ error = str_to_inst_ofpacts(act_str, &ofpacts);
+ if (!error) {
+ enum ofperr err;
+
+ err = ofpacts_check(ofpacts.data, ofpacts.size, &fm->match.flow,
+ OFPP_MAX, 0);
+ if (err) {
+ error = xasprintf("actions are invalid with specified match "
+ "(%s)", ofperr_to_string(err));
+ }
+ }
+ if (error) {
+ ofpbuf_uninit(&ofpacts);
+ return error;
+ }
+
+ fm->ofpacts_len = ofpacts.size;
+ fm->ofpacts = ofpbuf_steal_data(&ofpacts);
+ } else {
+ fm->ofpacts_len = 0;
+ fm->ofpacts = NULL;
+ }
+
+ return NULL;
+}
+
+/* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
+ * page) into 'fm' for sending the specified flow_mod 'command' to a switch.
+ *
+ * To parse syntax for an OFPT_FLOW_MOD (or NXT_FLOW_MOD), use an OFPFC_*
+ * constant for 'command'. To parse syntax for an OFPST_FLOW or
+ * OFPST_AGGREGATE (or NXST_FLOW or NXST_AGGREGATE), use -1 for 'command'.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+char * WARN_UNUSED_RESULT
+parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_)
+{
+ char *string = xstrdup(str_);
+ char *error;
+
+ error = parse_ofp_str__(fm, command, string);
+ if (error) {
+ fm->ofpacts = NULL;
+ fm->ofpacts_len = 0;
+ }
+
+ free(string);
+ return error;
+}
+
+static char * WARN_UNUSED_RESULT
+parse_ofp_meter_mod_str__(struct ofputil_meter_mod *mm, char *string,
+ struct ofpbuf *bands, int command)
+{
+ enum {
+ F_METER = 1 << 0,
+ F_FLAGS = 1 << 1,
+ F_BANDS = 1 << 2,
+ } fields;
+ char *save_ptr = NULL;
+ char *band_str = NULL;
+ char *name;
+
+ switch (command) {
+ case -1:
+ fields = F_METER;
+ break;
+
+ case OFPMC13_ADD:
+ fields = F_METER | F_FLAGS | F_BANDS;
+ break;
+
+ case OFPMC13_DELETE:
+ fields = F_METER;
+ break;
+
+ case OFPMC13_MODIFY:
+ fields = F_METER | F_FLAGS | F_BANDS;
+ break;
+
+ default:
+ NOT_REACHED();
+ }
+
+ mm->command = command;
+ mm->meter.meter_id = 0;
+ mm->meter.flags = 0;
+ if (fields & F_BANDS) {
+ band_str = strstr(string, "band");
+ if (!band_str) {
+ return xstrdup("must specify bands");
+ }
+ *band_str = '\0';
+
+ band_str = strchr(band_str + 1, '=');
+ if (!band_str) {
+ return xstrdup("must specify bands");
+ }
+
+ band_str++;
+ }
+ for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
+ name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
+
+ if (fields & F_FLAGS && !strcmp(name, "kbps")) {
+ mm->meter.flags |= OFPMF13_KBPS;
+ } else if (fields & F_FLAGS && !strcmp(name, "pktps")) {
+ mm->meter.flags |= OFPMF13_PKTPS;
+ } else if (fields & F_FLAGS && !strcmp(name, "burst")) {
+ mm->meter.flags |= OFPMF13_BURST;
+ } else if (fields & F_FLAGS && !strcmp(name, "stats")) {
+ mm->meter.flags |= OFPMF13_STATS;
+ } else {
+ char *value;
+
+ value = strtok_r(NULL, ", \t\r\n", &save_ptr);
+ if (!value) {
+ return xasprintf("field %s missing value", name);
+ }
+
+ if (!strcmp(name, "meter")) {
+ if (!strcmp(value, "all")) {
+ mm->meter.meter_id = OFPM13_ALL;
+ } else if (!strcmp(value, "controller")) {
+ mm->meter.meter_id = OFPM13_CONTROLLER;
+ } else if (!strcmp(value, "slowpath")) {
+ mm->meter.meter_id = OFPM13_SLOWPATH;
+ } else {
+ char *error = str_to_u32(value, &mm->meter.meter_id);
+ if (error) {
+ return error;
+ }
+ if (mm->meter.meter_id > OFPM13_MAX) {
+ return xasprintf("invalid value for %s", name);
+ }
+ }
+ } else {
+ return xasprintf("unknown keyword %s", name);
+ }
+ }
+ }
+ if (fields & F_METER && !mm->meter.meter_id) {
+ return xstrdup("must specify 'meter'");
+ }
+ if (fields & F_FLAGS && !mm->meter.flags) {
+ return xstrdup("meter must specify either 'kbps' or 'pktps'");
+ }
+
+ if (fields & F_BANDS) {
+ uint16_t n_bands = 0;
+ struct ofputil_meter_band *band = NULL;
+ int i;
+
+ for (name = strtok_r(band_str, "=, \t\r\n", &save_ptr); name;
+ name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
+
+ char *value;
+
+ value = strtok_r(NULL, ", \t\r\n", &save_ptr);
+ if (!value) {
+ return xasprintf("field %s missing value", name);
+ }
+
+ if (!strcmp(name, "type")) {
+ /* Start a new band */
+ band = ofpbuf_put_zeros(bands, sizeof *band);
+ n_bands++;
+
+ if (!strcmp(value, "drop")) {
+ band->type = OFPMBT13_DROP;
+ } else if (!strcmp(value, "dscp_remark")) {
+ band->type = OFPMBT13_DSCP_REMARK;
+ } else {
+ return xasprintf("field %s unknown value %s", name, value);
+ }
+ } else if (!band || !band->type) {
+ return xstrdup("band must start with the 'type' keyword");
+ } else if (!strcmp(name, "rate")) {
+ char *error = str_to_u32(value, &band->rate);
+ if (error) {
+ return error;
+ }
+ } else if (!strcmp(name, "burst_size")) {
+ char *error = str_to_u32(value, &band->burst_size);
+ if (error) {
+ return error;
+ }
+ } else if (!strcmp(name, "prec_level")) {
+ char *error = str_to_u8(value, name, &band->prec_level);
+ if (error) {
+ return error;
+ }
+ } else {
+ return xasprintf("unknown keyword %s", name);
+ }
+ }
+ /* validate bands */
+ if (!n_bands) {
+ return xstrdup("meter must have bands");
+ }
+
+ mm->meter.n_bands = n_bands;
+ mm->meter.bands = ofpbuf_steal_data(bands);
+
+ for (i = 0; i < n_bands; ++i) {
+ band = &mm->meter.bands[i];
+
+ if (!band->type) {
+ return xstrdup("band must have 'type'");
+ }
+ if (band->type == OFPMBT13_DSCP_REMARK) {
+ if (!band->prec_level) {
+ return xstrdup("'dscp_remark' band must have"
+ " 'prec_level'");
+ }
+ } else {
+ if (band->prec_level) {
+ return xstrdup("Only 'dscp_remark' band may have"
+ " 'prec_level'");
+ }
+ }
+ if (!band->rate) {
+ return xstrdup("band must have 'rate'");
+ }
+ if (mm->meter.flags & OFPMF13_BURST) {
+ if (!band->burst_size) {
+ return xstrdup("band must have 'burst_size' "
+ "when 'burst' flag is set");
+ }
+ } else {
+ if (band->burst_size) {
+ return xstrdup("band may have 'burst_size' only "
+ "when 'burst' flag is set");
+ }
+ }
+ }
+ } else {
+ mm->meter.n_bands = 0;
+ mm->meter.bands = NULL;
+ }
+
+ return NULL;
+}
+
+/* Convert 'str_' (as described in the Flow Syntax section of the ovs-ofctl man
+ * page) into 'mm' for sending the specified meter_mod 'command' to a switch.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+char * WARN_UNUSED_RESULT
+parse_ofp_meter_mod_str(struct ofputil_meter_mod *mm, const char *str_,
+ int command)
+{
+ struct ofpbuf bands;
+ char *string;
+ char *error;
+
+ ofpbuf_init(&bands, 64);
+ string = xstrdup(str_);
+
+ error = parse_ofp_meter_mod_str__(mm, string, &bands, command);
+
+ free(string);
+ ofpbuf_uninit(&bands);
+
+ return error;
+}
+
+static char * WARN_UNUSED_RESULT
+parse_flow_monitor_request__(struct ofputil_flow_monitor_request *fmr,
+ const char *str_, char *string)
+{
+ static atomic_uint32_t id = ATOMIC_VAR_INIT(0);
+ char *save_ptr = NULL;
+ char *name;
+
+ atomic_add(&id, 1, &fmr->id);
+
+ fmr->flags = (NXFMF_INITIAL | NXFMF_ADD | NXFMF_DELETE | NXFMF_MODIFY
+ | NXFMF_OWN | NXFMF_ACTIONS);
+ fmr->out_port = OFPP_NONE;
+ fmr->table_id = 0xff;
+ match_init_catchall(&fmr->match);
+
+ for (name = strtok_r(string, "=, \t\r\n", &save_ptr); name;
+ name = strtok_r(NULL, "=, \t\r\n", &save_ptr)) {
+ const struct protocol *p;
+
+ if (!strcmp(name, "!initial")) {
+ fmr->flags &= ~NXFMF_INITIAL;
+ } else if (!strcmp(name, "!add")) {
+ fmr->flags &= ~NXFMF_ADD;
+ } else if (!strcmp(name, "!delete")) {
+ fmr->flags &= ~NXFMF_DELETE;
+ } else if (!strcmp(name, "!modify")) {
+ fmr->flags &= ~NXFMF_MODIFY;
+ } else if (!strcmp(name, "!actions")) {
+ fmr->flags &= ~NXFMF_ACTIONS;
+ } else if (!strcmp(name, "!own")) {
+ fmr->flags &= ~NXFMF_OWN;
+ } else if (parse_protocol(name, &p)) {
+ match_set_dl_type(&fmr->match, htons(p->dl_type));
+ if (p->nw_proto) {
+ match_set_nw_proto(&fmr->match, p->nw_proto);
+ }
+ } else {
+ char *value;
+
+ value = strtok_r(NULL, ", \t\r\n", &save_ptr);
+ if (!value) {
+ return xasprintf("%s: field %s missing value", str_, name);
+ }
+
+ if (!strcmp(name, "table")) {
+ char *error = str_to_u8(value, "table", &fmr->table_id);
+ if (error) {
+ return error;
+ }
+ } else if (!strcmp(name, "out_port")) {
+ fmr->out_port = u16_to_ofp(atoi(value));
+ } else if (mf_from_name(name)) {
+ char *error;
+
+ error = parse_field(mf_from_name(name), value, &fmr->match);
+ if (error) {
+ return error;
+ }
+ } else {
+ return xasprintf("%s: unknown keyword %s", str_, name);
+ }
+ }
+ }
+ return NULL;
+}
+
+/* Convert 'str_' (as described in the documentation for the "monitor" command
+ * in the ovs-ofctl man page) into 'fmr'.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+char * WARN_UNUSED_RESULT
+parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
+ const char *str_)
+{
+ char *string = xstrdup(str_);
+ char *error = parse_flow_monitor_request__(fmr, str_, string);
+ free(string);
+ return error;
+}
+
+/* Parses 's' as a set of OpenFlow actions and appends the actions to
+ * 'actions'.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+char * WARN_UNUSED_RESULT
+parse_ofpacts(const char *s_, struct ofpbuf *ofpacts)
+{
+ char *s = xstrdup(s_);
+ char *error = str_to_ofpacts(s, ofpacts);
+ free(s);
+
+ return error;
+}
+
+/* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
+ * (one of OFPFC_*) into 'fm'.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+char * WARN_UNUSED_RESULT
+parse_ofp_flow_mod_str(struct ofputil_flow_mod *fm, const char *string,
+ uint16_t command)
+{
+ char *error = parse_ofp_str(fm, command, string);
+ if (!error) {
+ /* Normalize a copy of the match. This ensures that non-normalized
+ * flows get logged but doesn't affect what gets sent to the switch, so
+ * that the switch can do whatever it likes with the flow. */
+ struct match match_copy = fm->match;
+ ofputil_normalize_match(&match_copy);
+ }
+
+ return error;
+}
+
+/* Opens file 'file_name' and reads each line as a flow_mod of the specified
+ * type (one of OFPFC_*). Stores each flow_mod in '*fm', an array allocated
+ * on the caller's behalf, and the number of flow_mods in '*n_fms'.
+ *
+ * Returns NULL if successful, otherwise a malloc()'d string describing the
+ * error. The caller is responsible for freeing the returned string. */
+char * WARN_UNUSED_RESULT
+parse_ofp_flow_mod_file(const char *file_name, uint16_t command,
+ struct ofputil_flow_mod **fms, size_t *n_fms)
+{
+ size_t allocated_fms;
+ int line_number;
+ FILE *stream;
+ struct ds s;
+
+ *fms = NULL;
+ *n_fms = 0;
+
+ stream = !strcmp(file_name, "-") ? stdin : fopen(file_name, "r");
+ if (stream == NULL) {
+ return xasprintf("%s: open failed (%s)",
+ file_name, ovs_strerror(errno));
+ }
+
+ allocated_fms = *n_fms;
+ ds_init(&s);
+ line_number = 0;
+ while (!ds_get_preprocessed_line(&s, stream, &line_number)) {
+ char *error;
+
+ if (*n_fms >= allocated_fms) {
+ *fms = x2nrealloc(*fms, &allocated_fms, sizeof **fms);
+ }
+ error = parse_ofp_flow_mod_str(&(*fms)[*n_fms], ds_cstr(&s), command);
+ if (error) {
+ size_t i;
+
+ for (i = 0; i < *n_fms; i++) {
+ free((*fms)[i].ofpacts);
+ }
+ free(*fms);
+ *fms = NULL;
+ *n_fms = 0;
+
+ ds_destroy(&s);
+ if (stream != stdin) {
+ fclose(stream);
+ }
+
+ return xasprintf("%s:%d: %s", file_name, line_number, error);
+ }
+ *n_fms += 1;
+ }
+