static void addMatchSubnet(struct match* match,
const boost::asio::ip::address& ip,
uint8_t prefixLen, bool src,
uint16_t& ethType) {
if (ip.is_v4()) {
switch (ethType) {
case 0:
ethType = eth::type::IP;
/* fall through */
case eth::type::IP:
case eth::type::ARP:
break;
default:
return;
}
if (prefixLen > 32) prefixLen = 32;
uint32_t mask = (prefixLen != 0)
? (~((uint32_t)0) << (32 - prefixLen))
: 0;
uint32_t addr = ip.to_v4().to_ulong() & mask;
match_set_dl_type(match, htons(ethType));
if (src)
match_set_nw_src_masked(match, htonl(addr), htonl(mask));
else
match_set_nw_dst_masked(match, htonl(addr), htonl(mask));
} else {
switch (ethType) {
case 0:
ethType = eth::type::IPV6;
/* fall through */
case eth::type::IPV6:
break;
default:
return;
}
if (prefixLen > 128) prefixLen = 128;
struct in6_addr mask;
struct in6_addr addr;
network::compute_ipv6_subnet(ip.to_v6(), prefixLen, &mask, &addr);
match_set_dl_type(match, htons(ethType));
if (src)
match_set_ipv6_src_masked(match, &addr, &mask);
else
match_set_ipv6_dst_masked(match, &addr, &mask);
}
}
/* 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);
}
void
fill_match(struct match *match)
{
match_init_catchall(match);
match_set_in_port(match, 0xabcd);
match_set_dl_vlan(match, htons(999));
match_set_dl_dst(match, "\xaa\xbb\xcc\x99\x88\x77");
match_set_dl_type(match, htons(ETH_TYPE_IP));
match_set_nw_dst(match, inet_addr("192.168.2.1"));
match_set_tun_src(match, inet_addr("192.168.2.3"));
match_set_tun_dst(match, inet_addr("192.168.2.4"));
match_set_tun_id(match, htonll(50000));
}
void
fill_match(struct match *match)
{
const struct eth_addr dl_dst =
{ { { 0xaa, 0xbb, 0xcc, 0x99, 0x88, 0x77 } } };
match_init_catchall(match);
match_set_in_port(match, 0xabcd);
match_set_dl_vlan(match, htons(999));
match_set_dl_dst(match, dl_dst);
match_set_dl_type(match, htons(ETH_TYPE_IP));
match_set_nw_dst(match, inet_addr("192.168.2.1"));
match_set_tun_src(match, inet_addr("192.168.2.3"));
match_set_tun_dst(match, inet_addr("192.168.2.4"));
match_set_tun_id(match, htonll(50000));
}
/* 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);
}
FlowBuilder& FlowBuilder::ethType(uint16_t ethType) {
this->ethType_ = ethType;
match_set_dl_type(match(), htons(ethType));
return *this;
}
