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ovs/lib/ofp-parse.c
Ben Pfaff b78f6b77bc Remove support for obsolete "tun_id_from_cookie" extension. 
The "tun_id_from_cookie" OpenFlow extension predated NXM and supports only
a fraction of its features.  Nothing (at Nicira, anyway) uses it any
longer.  Support for it had been broken since January and it took until a
few days ago for anyone to complain, so it cannot be too important.  This
commit removes it.
2011-04-26 09:42:18 -07:00

909 lines
28 KiB
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/*
* Copyright (c) 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.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "ofp-parse.h"
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include "autopath.h"
#include "byte-order.h"
#include "dynamic-string.h"
#include "netdev.h"
#include "multipath.h"
#include "nx-match.h"
#include "ofp-util.h"
#include "ofpbuf.h"
#include "openflow/openflow.h"
#include "packets.h"
#include "socket-util.h"
#include "vconn.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(ofp_parse);
static uint32_t
str_to_u32(const char *str)
{
char *tail;
uint32_t value;
if (!str[0]) {
ovs_fatal(0, "missing required numeric argument");
}
errno = 0;
value = strtoul(str, &tail, 0);
if (errno == EINVAL || errno == ERANGE || *tail) {
ovs_fatal(0, "invalid numeric format %s", str);
}
return value;
}
static uint64_t
str_to_u64(const char *str)
{
char *tail;
uint64_t value;
if (!str[0]) {
ovs_fatal(0, "missing required numeric argument");
}
errno = 0;
value = strtoull(str, &tail, 0);
if (errno == EINVAL || errno == ERANGE || *tail) {
ovs_fatal(0, "invalid numeric format %s", str);
}
return value;
}
static void
str_to_mac(const char *str, uint8_t mac[6])
{
if (sscanf(str, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
!= ETH_ADDR_SCAN_COUNT) {
ovs_fatal(0, "invalid mac address %s", str);
}
}
static void
str_to_ip(const char *str_, ovs_be32 *ip, ovs_be32 *maskp)
{
char *str = xstrdup(str_);
char *save_ptr = NULL;
const char *name, *netmask;
struct in_addr in_addr;
ovs_be32 mask;
int retval;
name = strtok_r(str, "/", &save_ptr);
retval = name ? lookup_ip(name, &in_addr) : EINVAL;
if (retval) {
ovs_fatal(0, "%s: could not convert to IP address", str);
}
*ip = in_addr.s_addr;
netmask = strtok_r(NULL, "/", &save_ptr);
if (netmask) {
uint8_t o[4];
if (sscanf(netmask, "%"SCNu8".%"SCNu8".%"SCNu8".%"SCNu8,
&o[0], &o[1], &o[2], &o[3]) == 4) {
mask = htonl((o[0] << 24) | (o[1] << 16) | (o[2] << 8) | o[3]);
} else {
int prefix = atoi(netmask);
if (prefix <= 0 || prefix > 32) {
ovs_fatal(0, "%s: network prefix bits not between 1 and 32",
str);
} else if (prefix == 32) {
mask = htonl(UINT32_MAX);
} else {
mask = htonl(((1u << prefix) - 1) << (32 - prefix));
}
}
} else {
mask = htonl(UINT32_MAX);
}
*ip &= mask;
if (maskp) {
*maskp = mask;
} else {
if (mask != htonl(UINT32_MAX)) {
ovs_fatal(0, "%s: netmask not allowed here", str_);
}
}
free(str);
}
static void
str_to_tun_id(const char *str, ovs_be64 *tun_idp, ovs_be64 *maskp)
{
uint64_t tun_id, mask;
char *tail;
errno = 0;
tun_id = strtoull(str, &tail, 0);
if (errno || (*tail != '\0' && *tail != '/')) {
goto error;
}
if (*tail == '/') {
mask = strtoull(tail + 1, &tail, 0);
if (errno || *tail != '\0') {
goto error;
}
} else {
mask = UINT64_MAX;
}
*tun_idp = htonll(tun_id);
*maskp = htonll(mask);
return;
error:
ovs_fatal(0, "%s: bad syntax for tunnel id", str);
}
static void
str_to_ipv6(const char *str_, struct in6_addr *addrp, struct in6_addr *maskp)
{
char *str = xstrdup(str_);
char *save_ptr = NULL;
const char *name, *netmask;
struct in6_addr addr, mask;
int retval;
name = strtok_r(str, "/", &save_ptr);
retval = name ? lookup_ipv6(name, &addr) : EINVAL;
if (retval) {
ovs_fatal(0, "%s: could not convert to IPv6 address", str);
}
netmask = strtok_r(NULL, "/", &save_ptr);
if (netmask) {
int prefix = atoi(netmask);
if (prefix <= 0 || prefix > 128) {
ovs_fatal(0, "%s: network prefix bits not between 1 and 128",
str);
} else {
mask = ipv6_create_mask(prefix);
}
} else {
mask = in6addr_exact;
}
*addrp = ipv6_addr_bitand(&addr, &mask);
if (maskp) {
*maskp = mask;
} else {
if (!ipv6_mask_is_exact(&mask)) {
ovs_fatal(0, "%s: netmask not allowed here", str_);
}
}
free(str);
}
static void *
put_action(struct ofpbuf *b, size_t size, uint16_t type)
{
struct ofp_action_header *ah = ofpbuf_put_zeros(b, size);
ah->type = htons(type);
ah->len = htons(size);
return ah;
}
static struct ofp_action_output *
put_output_action(struct ofpbuf *b, uint16_t port)
{
struct ofp_action_output *oao = put_action(b, sizeof *oao, OFPAT_OUTPUT);
oao->port = htons(port);
return oao;
}
static void
put_enqueue_action(struct ofpbuf *b, uint16_t port, uint32_t queue)
{
struct ofp_action_enqueue *oae = put_action(b, sizeof *oae, OFPAT_ENQUEUE);
oae->port = htons(port);
oae->queue_id = htonl(queue);
}
static void
put_dl_addr_action(struct ofpbuf *b, uint16_t type, const char *addr)
{
struct ofp_action_dl_addr *oada = put_action(b, sizeof *oada, type);
str_to_mac(addr, oada->dl_addr);
}
static bool
parse_port_name(const char *name, uint16_t *port)
{
struct pair {
const char *name;
uint16_t value;
};
static const struct pair pairs[] = {
#define DEF_PAIR(NAME) {#NAME, OFPP_##NAME}
DEF_PAIR(IN_PORT),
DEF_PAIR(TABLE),
DEF_PAIR(NORMAL),
DEF_PAIR(FLOOD),
DEF_PAIR(ALL),
DEF_PAIR(CONTROLLER),
DEF_PAIR(LOCAL),
DEF_PAIR(NONE),
#undef DEF_PAIR
};
static const int n_pairs = ARRAY_SIZE(pairs);
size_t i;
for (i = 0; i < n_pairs; i++) {
if (!strcasecmp(name, pairs[i].name)) {
*port = pairs[i].value;
return true;
}
}
return false;
}
static void
str_to_action(char *str, struct ofpbuf *b)
{
bool drop = false;
int n_actions;
char *pos;
pos = str;
n_actions = 0;
for (;;) {
char empty_string[] = "";
char *act, *arg;
size_t actlen;
uint16_t port;
pos += strspn(pos, ", \t\r\n");
if (*pos == '\0') {
break;
}
if (drop) {
ovs_fatal(0, "Drop actions must not be followed by other actions");
}
act = pos;
actlen = strcspn(pos, ":(, \t\r\n");
if (act[actlen] == ':') {
/* The argument can be separated by a colon. */
size_t arglen;
arg = act + actlen + 1;
arglen = strcspn(arg, ", \t\r\n");
pos = arg + arglen + (arg[arglen] != '\0');
arg[arglen] = '\0';
} else if (act[actlen] == '(') {
/* The argument can be surrounded by balanced parentheses. The
* outermost set of parentheses is removed. */
int level = 1;
size_t arglen;
arg = act + actlen + 1;
for (arglen = 0; level > 0; arglen++) {
switch (arg[arglen]) {
case '\0':
ovs_fatal(0, "unbalanced parentheses in argument to %s "
"action", act);
case '(':
level++;
break;
case ')':
level--;
break;
}
}
arg[arglen - 1] = '\0';
pos = arg + arglen;
} else {
/* There might be no argument at all. */
arg = empty_string;
pos = act + actlen + (act[actlen] != '\0');
}
act[actlen] = '\0';
if (!strcasecmp(act, "mod_vlan_vid")) {
struct ofp_action_vlan_vid *va;
va = put_action(b, sizeof *va, OFPAT_SET_VLAN_VID);
va->vlan_vid = htons(str_to_u32(arg));
} else if (!strcasecmp(act, "mod_vlan_pcp")) {
struct ofp_action_vlan_pcp *va;
va = put_action(b, sizeof *va, OFPAT_SET_VLAN_PCP);
va->vlan_pcp = str_to_u32(arg);
} else if (!strcasecmp(act, "strip_vlan")) {
struct ofp_action_header *ah;
ah = put_action(b, sizeof *ah, OFPAT_STRIP_VLAN);
ah->type = htons(OFPAT_STRIP_VLAN);
} else if (!strcasecmp(act, "mod_dl_src")) {
put_dl_addr_action(b, OFPAT_SET_DL_SRC, arg);
} else if (!strcasecmp(act, "mod_dl_dst")) {
put_dl_addr_action(b, OFPAT_SET_DL_DST, arg);
} else if (!strcasecmp(act, "mod_nw_src")) {
struct ofp_action_nw_addr *na;
na = put_action(b, sizeof *na, OFPAT_SET_NW_SRC);
str_to_ip(arg, &na->nw_addr, NULL);
} else if (!strcasecmp(act, "mod_nw_dst")) {
struct ofp_action_nw_addr *na;
na = put_action(b, sizeof *na, OFPAT_SET_NW_DST);
str_to_ip(arg, &na->nw_addr, NULL);
} else if (!strcasecmp(act, "mod_tp_src")) {
struct ofp_action_tp_port *ta;
ta = put_action(b, sizeof *ta, OFPAT_SET_TP_SRC);
ta->tp_port = htons(str_to_u32(arg));
} else if (!strcasecmp(act, "mod_tp_dst")) {
struct ofp_action_tp_port *ta;
ta = put_action(b, sizeof *ta, OFPAT_SET_TP_DST);
ta->tp_port = htons(str_to_u32(arg));
} else if (!strcasecmp(act, "mod_nw_tos")) {
struct ofp_action_nw_tos *nt;
nt = put_action(b, sizeof *nt, OFPAT_SET_NW_TOS);
nt->nw_tos = str_to_u32(arg);
} else if (!strcasecmp(act, "resubmit")) {
struct nx_action_resubmit *nar;
nar = put_action(b, sizeof *nar, OFPAT_VENDOR);
nar->vendor = htonl(NX_VENDOR_ID);
nar->subtype = htons(NXAST_RESUBMIT);
nar->in_port = htons(str_to_u32(arg));
} else if (!strcasecmp(act, "set_tunnel")
|| !strcasecmp(act, "set_tunnel64")) {
uint64_t tun_id = str_to_u64(arg);
if (!strcasecmp(act, "set_tunnel64") || tun_id > UINT32_MAX) {
struct nx_action_set_tunnel64 *nast64;
nast64 = put_action(b, sizeof *nast64, OFPAT_VENDOR);
nast64->vendor = htonl(NX_VENDOR_ID);
nast64->subtype = htons(NXAST_SET_TUNNEL64);
nast64->tun_id = htonll(tun_id);
} else {
struct nx_action_set_tunnel *nast;
nast = put_action(b, sizeof *nast, OFPAT_VENDOR);
nast->vendor = htonl(NX_VENDOR_ID);
nast->subtype = htons(NXAST_SET_TUNNEL);
nast->tun_id = htonl(tun_id);
}
} else if (!strcasecmp(act, "drop_spoofed_arp")) {
struct nx_action_header *nah;
nah = put_action(b, sizeof *nah, OFPAT_VENDOR);
nah->vendor = htonl(NX_VENDOR_ID);
nah->subtype = htons(NXAST_DROP_SPOOFED_ARP);
} else if (!strcasecmp(act, "set_queue")) {
struct nx_action_set_queue *nasq;
nasq = put_action(b, sizeof *nasq, OFPAT_VENDOR);
nasq->vendor = htonl(NX_VENDOR_ID);
nasq->subtype = htons(NXAST_SET_QUEUE);
nasq->queue_id = htonl(str_to_u32(arg));
} else if (!strcasecmp(act, "pop_queue")) {
struct nx_action_header *nah;
nah = put_action(b, sizeof *nah, OFPAT_VENDOR);
nah->vendor = htonl(NX_VENDOR_ID);
nah->subtype = htons(NXAST_POP_QUEUE);
} else if (!strcasecmp(act, "note")) {
size_t start_ofs = b->size;
struct nx_action_note *nan;
int remainder;
size_t len;
nan = put_action(b, sizeof *nan, OFPAT_VENDOR);
nan->vendor = htonl(NX_VENDOR_ID);
nan->subtype = htons(NXAST_NOTE);
b->size -= sizeof nan->note;
while (*arg != '\0') {
uint8_t byte;
bool ok;
if (*arg == '.') {
arg++;
}
if (*arg == '\0') {
break;
}
byte = hexits_value(arg, 2, &ok);
if (!ok) {
ovs_fatal(0, "bad hex digit in `note' argument");
}
ofpbuf_put(b, &byte, 1);
arg += 2;
}
len = b->size - start_ofs;
remainder = len % OFP_ACTION_ALIGN;
if (remainder) {
ofpbuf_put_zeros(b, OFP_ACTION_ALIGN - remainder);
}
nan->len = htons(b->size - start_ofs);
} else if (!strcasecmp(act, "move")) {
struct nx_action_reg_move *move;
move = ofpbuf_put_uninit(b, sizeof *move);
nxm_parse_reg_move(move, arg);
} else if (!strcasecmp(act, "load")) {
struct nx_action_reg_load *load;
load = ofpbuf_put_uninit(b, sizeof *load);
nxm_parse_reg_load(load, arg);
} else if (!strcasecmp(act, "multipath")) {
struct nx_action_multipath *nam;
nam = ofpbuf_put_uninit(b, sizeof *nam);
multipath_parse(nam, arg);
} else if (!strcasecmp(act, "autopath")) {
struct nx_action_autopath *naa;
naa = ofpbuf_put_uninit(b, sizeof *naa);
autopath_parse(naa, arg);
} else if (!strcasecmp(act, "output")) {
put_output_action(b, str_to_u32(arg));
} else if (!strcasecmp(act, "enqueue")) {
char *sp = NULL;
char *port_s = strtok_r(arg, ":q", &sp);
char *queue = strtok_r(NULL, "", &sp);
if (port_s == NULL || queue == NULL) {
ovs_fatal(0, "\"enqueue\" syntax is \"enqueue:PORT:QUEUE\"");
}
put_enqueue_action(b, str_to_u32(port_s), str_to_u32(queue));
} else if (!strcasecmp(act, "drop")) {
/* A drop action in OpenFlow occurs by just not setting
* an action. */
drop = true;
if (n_actions) {
ovs_fatal(0, "Drop actions must not be preceded by other "
"actions");
}
} else if (!strcasecmp(act, "CONTROLLER")) {
struct ofp_action_output *oao;
oao = put_output_action(b, OFPP_CONTROLLER);
/* Unless a numeric argument is specified, we send the whole
* packet to the controller. */
if (arg[0] && (strspn(arg, "0123456789") == strlen(arg))) {
oao->max_len = htons(str_to_u32(arg));
} else {
oao->max_len = htons(UINT16_MAX);
}
} else if (parse_port_name(act, &port)) {
put_output_action(b, port);
} else if (strspn(act, "0123456789") == strlen(act)) {
put_output_action(b, str_to_u32(act));
} else {
ovs_fatal(0, "Unknown action: %s", act);
}
n_actions++;
}
}
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 },
};
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;
}
#define FIELDS \
FIELD(F_TUN_ID, "tun_id", 0) \
FIELD(F_IN_PORT, "in_port", FWW_IN_PORT) \
FIELD(F_DL_VLAN, "dl_vlan", 0) \
FIELD(F_DL_VLAN_PCP, "dl_vlan_pcp", 0) \
FIELD(F_DL_SRC, "dl_src", FWW_DL_SRC) \
FIELD(F_DL_DST, "dl_dst", FWW_DL_DST) \
FIELD(F_DL_TYPE, "dl_type", FWW_DL_TYPE) \
FIELD(F_NW_SRC, "nw_src", 0) \
FIELD(F_NW_DST, "nw_dst", 0) \
FIELD(F_NW_PROTO, "nw_proto", FWW_NW_PROTO) \
FIELD(F_NW_TOS, "nw_tos", FWW_NW_TOS) \
FIELD(F_TP_SRC, "tp_src", FWW_TP_SRC) \
FIELD(F_TP_DST, "tp_dst", FWW_TP_DST) \
FIELD(F_ICMP_TYPE, "icmp_type", FWW_TP_SRC) \
FIELD(F_ICMP_CODE, "icmp_code", FWW_TP_DST) \
FIELD(F_ARP_SHA, "arp_sha", FWW_ARP_SHA) \
FIELD(F_ARP_THA, "arp_tha", FWW_ARP_THA) \
FIELD(F_IPV6_SRC, "ipv6_src", 0) \
FIELD(F_IPV6_DST, "ipv6_dst", 0) \
FIELD(F_ND_TARGET, "nd_target", FWW_ND_TARGET) \
FIELD(F_ND_SLL, "nd_sll", FWW_ARP_SHA) \
FIELD(F_ND_TLL, "nd_tll", FWW_ARP_THA)
enum field_index {
#define FIELD(ENUM, NAME, WILDCARD) ENUM,
FIELDS
#undef FIELD
N_FIELDS
};
struct field {
enum field_index index;
const char *name;
flow_wildcards_t wildcard; /* FWW_* bit. */
};
static bool
parse_field_name(const char *name, const struct field **f_out)
{
static const struct field fields[N_FIELDS] = {
#define FIELD(ENUM, NAME, WILDCARD) { ENUM, NAME, WILDCARD },
FIELDS
#undef FIELD
};
const struct field *f;
for (f = fields; f < &fields[ARRAY_SIZE(fields)]; f++) {
if (!strcmp(f->name, name)) {
*f_out = f;
return true;
}
}
*f_out = NULL;
return false;
}
static void
parse_field_value(struct cls_rule *rule, enum field_index index,
const char *value)
{
uint8_t mac[ETH_ADDR_LEN];
ovs_be64 tun_id, tun_mask;
ovs_be32 ip, mask;
struct in6_addr ipv6, ipv6_mask;
uint16_t port_no;
switch (index) {
case F_TUN_ID:
str_to_tun_id(value, &tun_id, &tun_mask);
cls_rule_set_tun_id_masked(rule, tun_id, tun_mask);
break;
case F_IN_PORT:
if (!parse_port_name(value, &port_no)) {
port_no = atoi(value);
}
if (port_no == OFPP_LOCAL) {
port_no = ODPP_LOCAL;
}
cls_rule_set_in_port(rule, port_no);
break;
case F_DL_VLAN:
cls_rule_set_dl_vlan(rule, htons(str_to_u32(value)));
break;
case F_DL_VLAN_PCP:
cls_rule_set_dl_vlan_pcp(rule, str_to_u32(value));
break;
case F_DL_SRC:
str_to_mac(value, mac);
cls_rule_set_dl_src(rule, mac);
break;
case F_DL_DST:
str_to_mac(value, mac);
cls_rule_set_dl_dst(rule, mac);
break;
case F_DL_TYPE:
cls_rule_set_dl_type(rule, htons(str_to_u32(value)));
break;
case F_NW_SRC:
str_to_ip(value, &ip, &mask);
cls_rule_set_nw_src_masked(rule, ip, mask);
break;
case F_NW_DST:
str_to_ip(value, &ip, &mask);
cls_rule_set_nw_dst_masked(rule, ip, mask);
break;
case F_NW_PROTO:
cls_rule_set_nw_proto(rule, str_to_u32(value));
break;
case F_NW_TOS:
cls_rule_set_nw_tos(rule, str_to_u32(value));
break;
case F_TP_SRC:
cls_rule_set_tp_src(rule, htons(str_to_u32(value)));
break;
case F_TP_DST:
cls_rule_set_tp_dst(rule, htons(str_to_u32(value)));
break;
case F_ICMP_TYPE:
cls_rule_set_icmp_type(rule, str_to_u32(value));
break;
case F_ICMP_CODE:
cls_rule_set_icmp_code(rule, str_to_u32(value));
break;
case F_ARP_SHA:
str_to_mac(value, mac);
cls_rule_set_arp_sha(rule, mac);
break;
case F_ARP_THA:
str_to_mac(value, mac);
cls_rule_set_arp_tha(rule, mac);
break;
case F_IPV6_SRC:
str_to_ipv6(value, &ipv6, &ipv6_mask);
cls_rule_set_ipv6_src_masked(rule, &ipv6, &ipv6_mask);
break;
case F_IPV6_DST:
str_to_ipv6(value, &ipv6, &ipv6_mask);
cls_rule_set_ipv6_dst_masked(rule, &ipv6, &ipv6_mask);
break;
case F_ND_TARGET:
str_to_ipv6(value, &ipv6, NULL);
cls_rule_set_nd_target(rule, ipv6);
break;
case F_ND_SLL:
str_to_mac(value, mac);
cls_rule_set_arp_sha(rule, mac);
break;
case F_ND_TLL:
str_to_mac(value, mac);
cls_rule_set_arp_tha(rule, mac);
break;
case N_FIELDS:
NOT_REACHED();
}
}
static void
parse_reg_value(struct cls_rule *rule, int reg_idx, const char *value)
{
uint32_t reg_value, reg_mask;
if (!strcmp(value, "ANY") || !strcmp(value, "*")) {
cls_rule_set_reg_masked(rule, reg_idx, 0, 0);
} else if (sscanf(value, "%"SCNi32"/%"SCNi32,
&reg_value, &reg_mask) == 2) {
cls_rule_set_reg_masked(rule, reg_idx, reg_value, reg_mask);
} else if (sscanf(value, "%"SCNi32, &reg_value)) {
cls_rule_set_reg(rule, reg_idx, reg_value);
} else {
ovs_fatal(0, "register fields must take the form <value> "
"or <value>/<mask>");
}
}
/* Convert 'string' (as described in the Flow Syntax section of the ovs-ofctl
* man page) into 'pf'. If 'actions' is specified, an action must be in
* 'string' and may be expanded or reallocated. */
void
parse_ofp_str(struct flow_mod *fm, uint8_t *table_idx,
struct ofpbuf *actions, char *string)
{
char *save_ptr = NULL;
char *name;
if (table_idx) {
*table_idx = 0xff;
}
cls_rule_init_catchall(&fm->cr, OFP_DEFAULT_PRIORITY);
fm->cookie = htonll(0);
fm->command = UINT16_MAX;
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 (actions) {
char *act_str = strstr(string, "action");
if (!act_str) {
ovs_fatal(0, "must specify an action");
}
*act_str = '\0';
act_str = strchr(act_str + 1, '=');
if (!act_str) {
ovs_fatal(0, "must specify an action");
}
act_str++;
str_to_action(act_str, actions);
fm->actions = actions->data;
fm->n_actions = actions->size / sizeof(union ofp_action);
} else {
fm->actions = NULL;
fm->n_actions = 0;
}
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 {
const struct field *f;
char *value;
value = strtok_r(NULL, ", \t\r\n", &save_ptr);
if (!value) {
ovs_fatal(0, "field %s missing value", name);
}
if (table_idx && !strcmp(name, "table")) {
*table_idx = atoi(value);
} else if (!strcmp(name, "out_port")) {
fm->out_port = atoi(value);
} else if (!strcmp(name, "priority")) {
fm->cr.priority = atoi(value);
} else if (!strcmp(name, "idle_timeout")) {
fm->idle_timeout = atoi(value);
} else if (!strcmp(name, "hard_timeout")) {
fm->hard_timeout = atoi(value);
} else if (!strcmp(name, "cookie")) {
fm->cookie = htonll(str_to_u64(value));
} else if (parse_field_name(name, &f)) {
if (!strcmp(value, "*") || !strcmp(value, "ANY")) {
if (f->wildcard) {
fm->cr.wc.wildcards |= f->wildcard;
cls_rule_zero_wildcarded_fields(&fm->cr);
} else if (f->index == F_NW_SRC) {
cls_rule_set_nw_src_masked(&fm->cr, 0, 0);
} else if (f->index == F_NW_DST) {
cls_rule_set_nw_dst_masked(&fm->cr, 0, 0);
} else if (f->index == F_IPV6_SRC) {
cls_rule_set_ipv6_src_masked(&fm->cr,
&in6addr_any, &in6addr_any);
} else if (f->index == F_IPV6_DST) {
cls_rule_set_ipv6_dst_masked(&fm->cr,
&in6addr_any, &in6addr_any);
} else if (f->index == F_DL_VLAN) {
cls_rule_set_any_vid(&fm->cr);
} else if (f->index == F_DL_VLAN_PCP) {
cls_rule_set_any_pcp(&fm->cr);
} else {
NOT_REACHED();
}
} else {
parse_field_value(&fm->cr, f->index, value);
}
} else if (!strncmp(name, "reg", 3)
&& isdigit((unsigned char) name[3])) {
unsigned int reg_idx = atoi(name + 3);
if (reg_idx >= FLOW_N_REGS) {
ovs_fatal(0, "only %d registers supported", FLOW_N_REGS);
}
parse_reg_value(&fm->cr, reg_idx, value);
} else {
ovs_fatal(0, "unknown keyword %s", name);
}
}
}
}
/* Parses 'string' as an OFPT_FLOW_MOD or NXT_FLOW_MOD with command 'command'
* (one of OFPFC_*) and appends the parsed OpenFlow message to 'packets'.
* '*cur_format' should initially contain the flow format currently configured
* on the connection; this function will add a message to change the flow
* format and update '*cur_format', if this is necessary to add the parsed
* flow. */
void
parse_ofp_flow_mod_str(struct list *packets, enum nx_flow_format *cur_format,
char *string, uint16_t command)
{
bool is_del = command == OFPFC_DELETE || command == OFPFC_DELETE_STRICT;
enum nx_flow_format min_format, next_format;
struct ofpbuf actions;
struct ofpbuf *ofm;
struct flow_mod fm;
ofpbuf_init(&actions, 64);
parse_ofp_str(&fm, NULL, is_del ? NULL : &actions, string);
fm.command = command;
min_format = ofputil_min_flow_format(&fm.cr);
next_format = MAX(*cur_format, min_format);
if (next_format != *cur_format) {
struct ofpbuf *sff = ofputil_make_set_flow_format(next_format);
list_push_back(packets, &sff->list_node);
*cur_format = next_format;
}
ofm = ofputil_encode_flow_mod(&fm, *cur_format);
list_push_back(packets, &ofm->list_node);
ofpbuf_uninit(&actions);
}
/* Similar to parse_ofp_flow_mod_str(), except that the string is read from
* 'stream' and the command is always OFPFC_ADD. Returns false if end-of-file
* is reached before reading a flow, otherwise true. */
bool
parse_ofp_flow_mod_file(struct list *packets, enum nx_flow_format *cur,
FILE *stream, uint16_t command)
{
struct ds s;
bool ok;
ds_init(&s);
ok = ds_get_preprocessed_line(&s, stream) == 0;
if (ok) {
parse_ofp_flow_mod_str(packets, cur, ds_cstr(&s), command);
}
ds_destroy(&s);
return ok;
}
void
parse_ofp_flow_stats_request_str(struct flow_stats_request *fsr,
bool aggregate, char *string)
{
struct flow_mod fm;
uint8_t table_id;
parse_ofp_str(&fm, &table_id, NULL, string);
fsr->aggregate = aggregate;
fsr->match = fm.cr;
fsr->out_port = fm.out_port;
fsr->table_id = table_id;
}
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