/* Convert 'str_' (as described in the documentation for the "monitor" command
* in the ovs-ofctl man page) into 'fmr'. */
void
parse_flow_monitor_request(struct ofputil_flow_monitor_request *fmr,
const char *str_)
{
static uint32_t id;
char *string = xstrdup(str_);
char *save_ptr = NULL;
char *name;
fmr->id = 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) {
ovs_fatal(0, "%s: field %s missing value", str_, name);
}
if (!strcmp(name, "table")) {
fmr->table_id = str_to_u8(value, name);
} else if (!strcmp(name, "out_port")) {
fmr->out_port = u16_to_ofp(atoi(value));
} else if (mf_from_name(name)) {
parse_field(mf_from_name(name), value, &fmr->match);
} else {
ovs_fatal(0, "%s: unknown keyword %s", str_, name);
}
}
}
free(string);
}
static void
set_field_parse(const char *arg, struct ofpbuf *ofpacts)
{
char *orig = xstrdup(arg);
struct ofpact_reg_load *load = ofpact_put_REG_LOAD(ofpacts);
char *value;
char *delim;
char *key;
const struct mf_field *mf;
const char *error;
union mf_value mf_value;
value = orig;
delim = strstr(orig, "->");
if (!delim) {
ovs_fatal(0, "%s: missing `->'", orig);
}
if (strlen(delim) <= strlen("->")) {
ovs_fatal(0, "%s: missing field name following `->'", orig);
}
key = delim + strlen("->");
mf = mf_from_name(key);
if (!mf) {
ovs_fatal(0, "%s is not valid oxm field name", key);
}
if (!mf->writable) {
ovs_fatal(0, "%s is not allowed to set", key);
}
delim[0] = '\0';
error = mf_parse_value(mf, value, &mf_value);
if (error) {
ovs_fatal(0, "%s", error);
}
if (!mf_is_value_valid(mf, &mf_value)) {
ovs_fatal(0, "%s is not valid valid for field %s", value, key);
}
ofpact_set_field_init(load, mf, &mf_value);
free(orig);
}
/* 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.
* If 'actions' is specified, an action must be in 'string' and may be expanded
* or reallocated.
*
* 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'. */
void
parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
bool verbose)
{
enum {
F_OUT_PORT = 1 << 0,
F_ACTIONS = 1 << 1,
F_TIMEOUT = 1 << 3,
F_PRIORITY = 1 << 4,
F_FLAGS = 1 << 5,
} fields;
char *string = xstrdup(str_);
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->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) {
ofp_fatal(str_, verbose, "must specify an action");
}
*act_str = '\0';
act_str = strchr(act_str + 1, '=');
if (!act_str) {
ofp_fatal(str_, verbose, "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;
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) {
ofp_fatal(str_, verbose, "field %s missing value", name);
}
if (!strcmp(name, "table")) {
fm->table_id = str_to_u8(value, name);
} else if (!strcmp(name, "out_port")) {
if (!ofputil_port_from_string(value, &fm->out_port)) {
ofp_fatal(str_, verbose, "%s is not a valid OpenFlow port",
name);
}
} else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
fm->priority = str_to_u16(value, name);
} else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
fm->idle_timeout = str_to_u16(value, name);
} else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
fm->hard_timeout = str_to_u16(value, name);
} else if (!strcmp(name, "cookie")) {
char *mask = strchr(value, '/');
if (mask) {
/* A mask means we're searching for a cookie. */
if (command == OFPFC_ADD) {
ofp_fatal(str_, verbose, "flow additions cannot use "
"a cookie mask");
}
*mask = '\0';
fm->cookie = htonll(str_to_u64(value));
fm->cookie_mask = htonll(str_to_u64(mask+1));
} else {
/* No mask means that the cookie is being set. */
if (command != OFPFC_ADD && command != OFPFC_MODIFY
&& command != OFPFC_MODIFY_STRICT) {
ofp_fatal(str_, verbose, "cannot set cookie");
}
fm->new_cookie = htonll(str_to_u64(value));
}
} else if (mf_from_name(name)) {
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 {
ofp_fatal(str_, verbose, "unknown keyword %s", name);
}
}
}
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;
enum ofperr err;
ofpbuf_init(&ofpacts, 32);
str_to_inst_ofpacts(act_str, &ofpacts);
fm->ofpacts_len = ofpacts.size;
fm->ofpacts = ofpbuf_steal_data(&ofpacts);
err = ofpacts_check(fm->ofpacts, fm->ofpacts_len, &fm->match.flow,
OFPP_MAX, 0);
if (err) {
exit(EXIT_FAILURE);
}
} else {
fm->ofpacts_len = 0;
fm->ofpacts = NULL;
}
free(string);
}
/* Parses a specification of a flow from 's' into 'flow'. 's' must take the
* form FIELD=VALUE[,FIELD=VALUE]... where each FIELD is the name of a
* mf_field. Fields must be specified in a natural order for satisfying
* prerequisites.
*
* Returns NULL on success, otherwise a malloc()'d string that explains the
* problem. */
char *
parse_ofp_exact_flow(struct flow *flow, const char *s)
{
char *pos, *key, *value_s;
char *error = NULL;
char *copy;
memset(flow, 0, sizeof *flow);
pos = copy = xstrdup(s);
while (ofputil_parse_key_value(&pos, &key, &value_s)) {
const struct protocol *p;
if (parse_protocol(key, &p)) {
if (flow->dl_type) {
error = xasprintf("%s: Ethernet type set multiple times", s);
goto exit;
}
flow->dl_type = htons(p->dl_type);
if (p->nw_proto) {
if (flow->nw_proto) {
error = xasprintf("%s: network protocol set "
"multiple times", s);
goto exit;
}
flow->nw_proto = p->nw_proto;
}
} else {
const struct mf_field *mf;
union mf_value value;
char *field_error;
mf = mf_from_name(key);
if (!mf) {
error = xasprintf("%s: unknown field %s", s, key);
goto exit;
}
if (!mf_are_prereqs_ok(mf, flow)) {
error = xasprintf("%s: prerequisites not met for setting %s",
s, key);
goto exit;
}
if (!mf_is_zero(mf, flow)) {
error = xasprintf("%s: field %s set multiple times", s, key);
goto exit;
}
field_error = mf_parse_value(mf, value_s, &value);
if (field_error) {
error = xasprintf("%s: bad value for %s (%s)",
s, key, field_error);
free(field_error);
goto exit;
}
mf_set_flow_value(mf, &value, flow);
}
}
if (!flow->in_port.ofp_port) {
flow->in_port.ofp_port = OFPP_NONE;
}
exit:
free(copy);
if (error) {
memset(flow, 0, sizeof *flow);
}
return error;
}
/* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. The caller is responsible for freeing the returned string. */
static char * OVS_WARN_UNUSED_RESULT
learn_parse_spec(const char *orig, char *name, char *value,
struct ofpact_learn_spec *spec)
{
if (mf_from_name(name)) {
const struct mf_field *dst = mf_from_name(name);
union mf_value imm;
char *error;
error = mf_parse_value(dst, value, &imm);
if (error) {
return error;
}
spec->n_bits = dst->n_bits;
spec->src_type = NX_LEARN_SRC_IMMEDIATE;
memset(&spec->src_imm, 0, sizeof spec->src_imm);
memcpy(&spec->src_imm.u8[sizeof spec->src_imm - dst->n_bytes],
&imm, dst->n_bytes);
spec->dst_type = NX_LEARN_DST_MATCH;
spec->dst.field = dst;
spec->dst.ofs = 0;
spec->dst.n_bits = dst->n_bits;
} else if (strchr(name, '[')) {
/* Parse destination and check prerequisites. */
char *error;
error = mf_parse_subfield(&spec->dst, name);
if (error) {
return error;
}
if (!mf_nxm_header(spec->dst.field->id)) {
return xasprintf("%s: experimenter OXM field '%s' not supported",
orig, name);
}
/* Parse source and check prerequisites. */
if (value[0] != '\0') {
error = mf_parse_subfield(&spec->src, value);
if (error) {
return error;
}
if (spec->src.n_bits != spec->dst.n_bits) {
return xasprintf("%s: bit widths of %s (%u) and %s (%u) "
"differ", orig, name, spec->src.n_bits, value,
spec->dst.n_bits);
}
} else {
spec->src = spec->dst;
}
spec->n_bits = spec->src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->dst_type = NX_LEARN_DST_MATCH;
} else if (!strcmp(name, "load")) {
if (value[strcspn(value, "[-")] == '-') {
char *error = learn_parse_load_immediate(value, spec);
if (error) {
return error;
}
} else {
struct ofpact_reg_move move;
char *error;
error = nxm_parse_reg_move(&move, value);
if (error) {
return error;
}
spec->n_bits = move.src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->src = move.src;
spec->dst_type = NX_LEARN_DST_LOAD;
spec->dst = move.dst;
}
} else if (!strcmp(name, "output")) {
char *error = mf_parse_subfield(&spec->src, value);
if (error) {
return error;
}
spec->n_bits = spec->src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->dst_type = NX_LEARN_DST_OUTPUT;
} else {
return xasprintf("%s: unknown keyword %s", orig, name);
}
return NULL;
}
static void
learn_parse_spec(const char *orig, char *name, char *value,
struct ofpact_learn_spec *spec)
{
if (mf_from_name(name)) {
const struct mf_field *dst = mf_from_name(name);
union mf_value imm;
char *error;
error = mf_parse_value(dst, value, &imm);
if (error) {
ovs_fatal(0, "%s", error);
}
spec->n_bits = dst->n_bits;
spec->src_type = NX_LEARN_SRC_IMMEDIATE;
memset(&spec->src_imm, 0, sizeof spec->src_imm);
memcpy(&spec->src_imm.u8[sizeof spec->src_imm - dst->n_bytes],
&imm, dst->n_bytes);
spec->dst_type = NX_LEARN_DST_MATCH;
spec->dst.field = dst;
spec->dst.ofs = 0;
spec->dst.n_bits = dst->n_bits;
} else if (strchr(name, '[')) {
/* Parse destination and check prerequisites. */
if (mf_parse_subfield(&spec->dst, name)[0] != '\0') {
ovs_fatal(0, "%s: syntax error after NXM field name `%s'",
orig, name);
}
/* Parse source and check prerequisites. */
if (value[0] != '\0') {
if (mf_parse_subfield(&spec->src, value)[0] != '\0') {
ovs_fatal(0, "%s: syntax error after NXM field name `%s'",
orig, value);
}
if (spec->src.n_bits != spec->dst.n_bits) {
ovs_fatal(0, "%s: bit widths of %s (%u) and %s (%u) differ",
orig, name, spec->src.n_bits, value,
spec->dst.n_bits);
}
} else {
spec->src = spec->dst;
}
spec->n_bits = spec->src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->dst_type = NX_LEARN_DST_MATCH;
} else if (!strcmp(name, "load")) {
if (value[strcspn(value, "[-")] == '-') {
learn_parse_load_immediate(value, spec);
} else {
struct ofpact_reg_move move;
nxm_parse_reg_move(&move, value);
spec->n_bits = move.src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->src = move.src;
spec->dst_type = NX_LEARN_DST_LOAD;
spec->dst = move.dst;
}
} else if (!strcmp(name, "output")) {
if (mf_parse_subfield(&spec->src, value)[0] != '\0') {
ovs_fatal(0, "%s: syntax error after NXM field name `%s'",
orig, name);
}
spec->n_bits = spec->src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->dst_type = NX_LEARN_DST_OUTPUT;
} else {
ovs_fatal(0, "%s: unknown keyword %s", orig, name);
}
}
static void
process_packet_in(struct lswitch *sw, const struct ofp_header *oh)
{
struct ofputil_packet_in pi;
uint32_t buffer_id;
uint64_t ofpacts_stub[64];
struct ofpbuf ofpacts;
struct ofputil_packet_out po;
enum ofperr error;
uint8_t icmp_packet[128];
const struct mf_field *mf;
const struct mf_field *mf_id;
union mf_value sf_value, sf_mask;
union mf_value sf_value_id, sf_mask_id;
error = ofputil_decode_packet_in(oh, true, &pi, NULL, &buffer_id, NULL);
if (error) {
VLOG_WARN_RL(&rl, "failed to decode packet-in: %s",
ofperr_to_string(error));
return;
}
/* Ignore packets sent via output to OFPP_CONTROLLER. This library never
* uses such an action. You never know what experiments might be going on,
* though, and it seems best not to interfere with them. */
if (pi.reason != OFPR_ACTION || buffer_id != UINT32_MAX) {
return;
}
struct ethhdr *old_pkt = pi.packet;
struct iphdr * old_ipv4 = (struct iphdr*)(old_pkt + 1);
uint16_t old_tot_len = ntohs(old_ipv4->tot_len);
uint8_t header_len = old_ipv4->ihl*4;
if (pi.packet_len < header_len + sizeof(struct ethhdr) + 8 || old_tot_len < header_len + 8)
return;
if (old_pkt->h_proto != htons(ETH_P_IP))
return;
//VLOG_INFO("AFTER MATCH");
uint32_t icmp_packet_len = sizeof(struct ethhdr) + sizeof(struct iphdr) + header_len + sizeof(struct icmphdr) + 8;
icmp_unexpect_ttl(icmp_packet, &pi, header_len, ICMP_TIME_EXCEEDED, ICMP_EXC_TTL, 0);
ofpbuf_use_stack(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
mf_id = mf_from_name("tun_id");
if (!mf_id)
return;
sf_value_id.be64 = pi.flow_metadata.flow.tunnel.tun_id;
sf_mask_id.be64 = OVS_BE64_MAX;
ofpact_put_set_field(&ofpacts, mf_id, &sf_value_id, &sf_mask_id);
mf = mf_from_name("tun_dst");
if (!mf)
return;
sf_value.be32 = pi.flow_metadata.flow.tunnel.ip_src;
sf_mask.be32 = OVS_BE32_MAX;
ofpact_put_set_field(&ofpacts, mf, &sf_value, &sf_mask);
ofpact_put_OUTPUT(&ofpacts)->port = OFPP_IN_PORT;
/* Prepare packet_out in case we need one. */
po.buffer_id = buffer_id;
po.packet = icmp_packet;
po.packet_len = icmp_packet_len;
po.in_port = pi.flow_metadata.flow.in_port.ofp_port;
po.ofpacts = ofpacts.data;
po.ofpacts_len = ofpacts.size;
queue_tx(sw, ofputil_encode_packet_out(&po, sw->protocol));
//VLOG_INFO("AFTER MATCH last");
}
/* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. The caller is responsible for freeing the returned string. */
static char * OVS_WARN_UNUSED_RESULT
learn_parse_spec(const char *orig, char *name, char *value,
struct ofpact_learn_spec *spec,
struct ofpbuf *ofpacts, struct match *match)
{
if (mf_from_name(name)) {
const struct mf_field *dst = mf_from_name(name);
union mf_value imm;
char *error;
error = mf_parse_value(dst, value, &imm);
if (error) {
return error;
}
spec->n_bits = dst->n_bits;
spec->src_type = NX_LEARN_SRC_IMMEDIATE;
spec->dst_type = NX_LEARN_DST_MATCH;
spec->dst.field = dst;
spec->dst.ofs = 0;
spec->dst.n_bits = dst->n_bits;
/* Update 'match' to allow for satisfying destination
* prerequisites. */
mf_set_value(dst, &imm, match, NULL);
/* Push value last, as this may reallocate 'spec'! */
uint8_t *src_imm = ofpbuf_put_zeros(ofpacts,
OFPACT_ALIGN(dst->n_bytes));
memcpy(src_imm, &imm, dst->n_bytes);
} else if (strchr(name, '[')) {
/* Parse destination and check prerequisites. */
char *error;
error = mf_parse_subfield(&spec->dst, name);
if (error) {
return error;
}
if (!mf_nxm_header(spec->dst.field->id)) {
return xasprintf("%s: experimenter OXM field '%s' not supported",
orig, name);
}
/* Parse source and check prerequisites. */
if (value[0] != '\0') {
error = mf_parse_subfield(&spec->src, value);
if (error) {
return error;
}
if (spec->src.n_bits != spec->dst.n_bits) {
return xasprintf("%s: bit widths of %s (%u) and %s (%u) "
"differ", orig, name, spec->src.n_bits, value,
spec->dst.n_bits);
}
} else {
spec->src = spec->dst;
}
spec->n_bits = spec->src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->dst_type = NX_LEARN_DST_MATCH;
} else if (!strcmp(name, "load")) {
if (value[strcspn(value, "[-")] == '-') {
char *error = learn_parse_load_immediate(value, spec, ofpacts);
if (error) {
return error;
}
} else {
struct ofpact_reg_move move;
char *error;
error = nxm_parse_reg_move(&move, value);
if (error) {
return error;
}
spec->n_bits = move.src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->src = move.src;
spec->dst_type = NX_LEARN_DST_LOAD;
spec->dst = move.dst;
}
} else if (!strcmp(name, "output")) {
char *error = mf_parse_subfield(&spec->src, value);
if (error) {
return error;
}
spec->n_bits = spec->src.n_bits;
spec->src_type = NX_LEARN_SRC_FIELD;
spec->dst_type = NX_LEARN_DST_OUTPUT;
} else {
return xasprintf("%s: unknown keyword %s", orig, name);
}
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.
* If 'actions' is specified, an action must be in 'string' and may be expanded
* or reallocated.
*
* 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'. */
void
parse_ofp_str(struct ofputil_flow_mod *fm, int command, const char *str_,
bool verbose)
{
enum {
F_OUT_PORT = 1 << 0,
F_ACTIONS = 1 << 1,
F_TIMEOUT = 1 << 3,
F_PRIORITY = 1 << 4
} fields;
char *string = xstrdup(str_);
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;
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;
break;
case OFPFC_MODIFY_STRICT:
fields = F_ACTIONS | F_PRIORITY;
break;
default:
NOT_REACHED();
}
cls_rule_init_catchall(&fm->cr, 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->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_NONE;
fm->flags = 0;
if (fields & F_ACTIONS) {
act_str = strstr(string, "action");
if (!act_str) {
ofp_fatal(str_, verbose, "must specify an action");
}
*act_str = '\0';
act_str = strchr(act_str + 1, '=');
if (!act_str) {
ofp_fatal(str_, verbose, "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;
if (parse_protocol(name, &p)) {
cls_rule_set_dl_type(&fm->cr, htons(p->dl_type));
if (p->nw_proto) {
cls_rule_set_nw_proto(&fm->cr, p->nw_proto);
}
} else {
char *value;
value = strtok_r(NULL, ", \t\r\n", &save_ptr);
if (!value) {
ofp_fatal(str_, verbose, "field %s missing value", name);
}
if (!strcmp(name, "table")) {
fm->table_id = str_to_table_id(value);
} else if (!strcmp(name, "out_port")) {
fm->out_port = atoi(value);
} else if (fields & F_PRIORITY && !strcmp(name, "priority")) {
fm->cr.priority = str_to_u16(value, name);
} else if (fields & F_TIMEOUT && !strcmp(name, "idle_timeout")) {
fm->idle_timeout = str_to_u16(value, name);
} else if (fields & F_TIMEOUT && !strcmp(name, "hard_timeout")) {
fm->hard_timeout = str_to_u16(value, name);
} else if (!strcmp(name, "cookie")) {
char *mask = strchr(value, '/');
if (mask) {
/* A mask means we're searching for a cookie. */
if (command == OFPFC_ADD) {
ofp_fatal(str_, verbose, "flow additions cannot use "
"a cookie mask");
}
*mask = '\0';
fm->cookie = htonll(str_to_u64(value));
fm->cookie_mask = htonll(str_to_u64(mask+1));
} else {
/* No mask means that the cookie is being set. */
if (command != OFPFC_ADD && command != OFPFC_MODIFY
&& command != OFPFC_MODIFY_STRICT) {
ofp_fatal(str_, verbose, "cannot set cookie");
}
fm->new_cookie = htonll(str_to_u64(value));
}
} else if (mf_from_name(name)) {
parse_field(mf_from_name(name), value, &fm->cr);
} else if (!strcmp(name, "duration")
|| !strcmp(name, "n_packets")
|| !strcmp(name, "n_bytes")) {
/* Ignore these, so that users can feed the output of
* "ovs-ofctl dump-flows" back into commands that parse
* flows. */
} else {
ofp_fatal(str_, verbose, "unknown keyword %s", name);
}
}
}
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 actions;
ofpbuf_init(&actions, sizeof(union ofp_action));
str_to_action(&fm->cr.flow, act_str, &actions);
fm->actions = ofpbuf_steal_data(&actions);
fm->n_actions = actions.size / sizeof(union ofp_action);
} else {
fm->actions = NULL;
fm->n_actions = 0;
}
free(string);
}