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odp-util.c
2155 lines (1863 loc) · 69.3 KB
/
odp-util.c
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/*
* Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
*
* 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 <arpa/inet.h>
#include "odp-util.h"
#include <errno.h>
#include <inttypes.h>
#include <math.h>
#include <netinet/in.h>
#include <netinet/icmp6.h>
#include <stdlib.h>
#include <string.h>
#include "byte-order.h"
#include "coverage.h"
#include "dynamic-string.h"
#include "flow.h"
#include "netlink.h"
#include "ofpbuf.h"
#include "packets.h"
#include "simap.h"
#include "timeval.h"
#include "util.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(odp_util);
/* The interface between userspace and kernel uses an "OVS_*" prefix.
* Since this is fairly non-specific for the OVS userspace components,
* "ODP_*" (Open vSwitch Datapath) is used as the prefix for
* interactions with the datapath.
*/
/* The set of characters that may separate one action or one key attribute
* from another. */
static const char *delimiters = ", \t\r\n";
static int parse_odp_key_attr(const char *, const struct simap *port_names,
struct ofpbuf *);
static void format_odp_key_attr(const struct nlattr *a, struct ds *ds);
/* Returns one the following for the action with the given OVS_ACTION_ATTR_*
* 'type':
*
* - For an action whose argument has a fixed length, returned that
* nonnegative length in bytes.
*
* - For an action with a variable-length argument, returns -2.
*
* - For an invalid 'type', returns -1. */
static int
odp_action_len(uint16_t type)
{
if (type > OVS_ACTION_ATTR_MAX) {
return -1;
}
switch ((enum ovs_action_attr) type) {
case OVS_ACTION_ATTR_OUTPUT: return sizeof(uint32_t);
case OVS_ACTION_ATTR_USERSPACE: return -2;
case OVS_ACTION_ATTR_PUSH_VLAN: return sizeof(struct ovs_action_push_vlan);
case OVS_ACTION_ATTR_POP_VLAN: return 0;
case OVS_ACTION_ATTR_SET: return -2;
case OVS_ACTION_ATTR_SAMPLE: return -2;
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
return -1;
}
return -1;
}
static const char *
ovs_key_attr_to_string(enum ovs_key_attr attr)
{
static char unknown_attr[3 + INT_STRLEN(unsigned int) + 1];
switch (attr) {
case OVS_KEY_ATTR_UNSPEC: return "unspec";
case OVS_KEY_ATTR_ENCAP: return "encap";
case OVS_KEY_ATTR_PRIORITY: return "priority";
case OVS_KEY_ATTR_SKB_MARK: return "skb_mark";
case OVS_KEY_ATTR_TUN_ID: return "tun_id";
case OVS_KEY_ATTR_IPV4_TUNNEL: return "ipv4_tunnel";
case OVS_KEY_ATTR_IN_PORT: return "in_port";
case OVS_KEY_ATTR_ETHERNET: return "eth";
case OVS_KEY_ATTR_VLAN: return "vlan";
case OVS_KEY_ATTR_ETHERTYPE: return "eth_type";
case OVS_KEY_ATTR_IPV4: return "ipv4";
case OVS_KEY_ATTR_IPV6: return "ipv6";
case OVS_KEY_ATTR_TCP: return "tcp";
case OVS_KEY_ATTR_UDP: return "udp";
case OVS_KEY_ATTR_ICMP: return "icmp";
case OVS_KEY_ATTR_ICMPV6: return "icmpv6";
case OVS_KEY_ATTR_ARP: return "arp";
case OVS_KEY_ATTR_ND: return "nd";
case __OVS_KEY_ATTR_MAX:
default:
snprintf(unknown_attr, sizeof unknown_attr, "key%u",
(unsigned int) attr);
return unknown_attr;
}
}
static void
format_generic_odp_action(struct ds *ds, const struct nlattr *a)
{
size_t len = nl_attr_get_size(a);
ds_put_format(ds, "action%"PRId16, nl_attr_type(a));
if (len) {
const uint8_t *unspec;
unsigned int i;
unspec = nl_attr_get(a);
for (i = 0; i < len; i++) {
ds_put_char(ds, i ? ' ': '(');
ds_put_format(ds, "%02x", unspec[i]);
}
ds_put_char(ds, ')');
}
}
static void
format_odp_sample_action(struct ds *ds, const struct nlattr *attr)
{
static const struct nl_policy ovs_sample_policy[] = {
[OVS_SAMPLE_ATTR_PROBABILITY] = { .type = NL_A_U32 },
[OVS_SAMPLE_ATTR_ACTIONS] = { .type = NL_A_NESTED }
};
struct nlattr *a[ARRAY_SIZE(ovs_sample_policy)];
double percentage;
const struct nlattr *nla_acts;
int len;
ds_put_cstr(ds, "sample");
if (!nl_parse_nested(attr, ovs_sample_policy, a, ARRAY_SIZE(a))) {
ds_put_cstr(ds, "(error)");
return;
}
percentage = (100.0 * nl_attr_get_u32(a[OVS_SAMPLE_ATTR_PROBABILITY])) /
UINT32_MAX;
ds_put_format(ds, "(sample=%.1f%%,", percentage);
ds_put_cstr(ds, "actions(");
nla_acts = nl_attr_get(a[OVS_SAMPLE_ATTR_ACTIONS]);
len = nl_attr_get_size(a[OVS_SAMPLE_ATTR_ACTIONS]);
format_odp_actions(ds, nla_acts, len);
ds_put_format(ds, "))");
}
static const char *
slow_path_reason_to_string(uint32_t data)
{
enum slow_path_reason bit = (enum slow_path_reason) data;
switch (bit) {
case SLOW_CFM:
return "cfm";
case SLOW_LACP:
return "lacp";
case SLOW_STP:
return "stp";
case SLOW_IN_BAND:
return "in_band";
case SLOW_CONTROLLER:
return "controller";
case SLOW_MATCH:
return "match";
default:
return NULL;
}
}
static int
parse_flags(const char *s, const char *(*bit_to_string)(uint32_t),
uint32_t *res)
{
uint32_t result = 0;
int n = 0;
if (s[n] != '(') {
return -EINVAL;
}
n++;
while (s[n] != ')') {
unsigned long long int flags;
uint32_t bit;
int n0;
if (sscanf(&s[n], "%lli%n", &flags, &n0) > 0 && n0 > 0) {
n += n0 + (s[n + n0] == ',');
result |= flags;
continue;
}
for (bit = 1; bit; bit <<= 1) {
const char *name = bit_to_string(bit);
size_t len;
if (!name) {
continue;
}
len = strlen(name);
if (!strncmp(s + n, name, len) &&
(s[n + len] == ',' || s[n + len] == ')')) {
result |= bit;
n += len + (s[n + len] == ',');
break;
}
}
if (!bit) {
return -EINVAL;
}
}
n++;
*res = result;
return n;
}
static void
format_odp_userspace_action(struct ds *ds, const struct nlattr *attr)
{
static const struct nl_policy ovs_userspace_policy[] = {
[OVS_USERSPACE_ATTR_PID] = { .type = NL_A_U32 },
[OVS_USERSPACE_ATTR_USERDATA] = { .type = NL_A_U64, .optional = true },
};
struct nlattr *a[ARRAY_SIZE(ovs_userspace_policy)];
if (!nl_parse_nested(attr, ovs_userspace_policy, a, ARRAY_SIZE(a))) {
ds_put_cstr(ds, "userspace(error)");
return;
}
ds_put_format(ds, "userspace(pid=%"PRIu32,
nl_attr_get_u32(a[OVS_USERSPACE_ATTR_PID]));
if (a[OVS_USERSPACE_ATTR_USERDATA]) {
uint64_t userdata = nl_attr_get_u64(a[OVS_USERSPACE_ATTR_USERDATA]);
union user_action_cookie cookie;
memcpy(&cookie, &userdata, sizeof cookie);
switch (cookie.type) {
case USER_ACTION_COOKIE_SFLOW:
ds_put_format(ds, ",sFlow("
"vid=%"PRIu16",pcp=%"PRIu8",output=%"PRIu32")",
vlan_tci_to_vid(cookie.sflow.vlan_tci),
vlan_tci_to_pcp(cookie.sflow.vlan_tci),
cookie.sflow.output);
break;
case USER_ACTION_COOKIE_SLOW_PATH:
ds_put_cstr(ds, ",slow_path(");
format_flags(ds, slow_path_reason_to_string,
cookie.slow_path.reason, ',');
ds_put_format(ds, ")");
break;
case USER_ACTION_COOKIE_UNSPEC:
default:
ds_put_format(ds, ",userdata=0x%"PRIx64, userdata);
break;
}
}
ds_put_char(ds, ')');
}
static void
format_vlan_tci(struct ds *ds, ovs_be16 vlan_tci)
{
ds_put_format(ds, "vid=%"PRIu16",pcp=%d",
vlan_tci_to_vid(vlan_tci),
vlan_tci_to_pcp(vlan_tci));
if (!(vlan_tci & htons(VLAN_CFI))) {
ds_put_cstr(ds, ",cfi=0");
}
}
static void
format_odp_action(struct ds *ds, const struct nlattr *a)
{
int expected_len;
enum ovs_action_attr type = nl_attr_type(a);
const struct ovs_action_push_vlan *vlan;
expected_len = odp_action_len(nl_attr_type(a));
if (expected_len != -2 && nl_attr_get_size(a) != expected_len) {
ds_put_format(ds, "bad length %zu, expected %d for: ",
nl_attr_get_size(a), expected_len);
format_generic_odp_action(ds, a);
return;
}
switch (type) {
case OVS_ACTION_ATTR_OUTPUT:
ds_put_format(ds, "%"PRIu16, nl_attr_get_u32(a));
break;
case OVS_ACTION_ATTR_USERSPACE:
format_odp_userspace_action(ds, a);
break;
case OVS_ACTION_ATTR_SET:
ds_put_cstr(ds, "set(");
format_odp_key_attr(nl_attr_get(a), ds);
ds_put_cstr(ds, ")");
break;
case OVS_ACTION_ATTR_PUSH_VLAN:
vlan = nl_attr_get(a);
ds_put_cstr(ds, "push_vlan(");
if (vlan->vlan_tpid != htons(ETH_TYPE_VLAN)) {
ds_put_format(ds, "tpid=0x%04"PRIx16",", ntohs(vlan->vlan_tpid));
}
format_vlan_tci(ds, vlan->vlan_tci);
ds_put_char(ds, ')');
break;
case OVS_ACTION_ATTR_POP_VLAN:
ds_put_cstr(ds, "pop_vlan");
break;
case OVS_ACTION_ATTR_SAMPLE:
format_odp_sample_action(ds, a);
break;
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
default:
format_generic_odp_action(ds, a);
break;
}
}
void
format_odp_actions(struct ds *ds, const struct nlattr *actions,
size_t actions_len)
{
if (actions_len) {
const struct nlattr *a;
unsigned int left;
NL_ATTR_FOR_EACH (a, left, actions, actions_len) {
if (a != actions) {
ds_put_char(ds, ',');
}
format_odp_action(ds, a);
}
if (left) {
int i;
if (left == actions_len) {
ds_put_cstr(ds, "<empty>");
}
ds_put_format(ds, ",***%u leftover bytes*** (", left);
for (i = 0; i < left; i++) {
ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
}
ds_put_char(ds, ')');
}
} else {
ds_put_cstr(ds, "drop");
}
}
static int
parse_odp_action(const char *s, const struct simap *port_names,
struct ofpbuf *actions)
{
/* Many of the sscanf calls in this function use oversized destination
* fields because some sscanf() implementations truncate the range of %i
* directives, so that e.g. "%"SCNi16 interprets input of "0xfedc" as a
* value of 0x7fff. The other alternatives are to allow only a single
* radix (e.g. decimal or hexadecimal) or to write more sophisticated
* parsers.
*
* The tun_id parser has to use an alternative approach because there is no
* type larger than 64 bits. */
{
unsigned long long int port;
int n = -1;
if (sscanf(s, "%lli%n", &port, &n) > 0 && n > 0) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, port);
return n;
}
}
if (port_names) {
int len = strcspn(s, delimiters);
struct simap_node *node;
node = simap_find_len(port_names, s, len);
if (node) {
nl_msg_put_u32(actions, OVS_ACTION_ATTR_OUTPUT, node->data);
return len;
}
}
{
unsigned long long int pid;
unsigned long long int output;
char userdata_s[32];
int vid, pcp;
int n = -1;
if (sscanf(s, "userspace(pid=%lli)%n", &pid, &n) > 0 && n > 0) {
odp_put_userspace_action(pid, NULL, actions);
return n;
} else if (sscanf(s, "userspace(pid=%lli,sFlow(vid=%i,"
"pcp=%i,output=%lli))%n",
&pid, &vid, &pcp, &output, &n) > 0 && n > 0) {
union user_action_cookie cookie;
uint16_t tci;
tci = vid | (pcp << VLAN_PCP_SHIFT);
if (tci) {
tci |= VLAN_CFI;
}
cookie.type = USER_ACTION_COOKIE_SFLOW;
cookie.sflow.vlan_tci = htons(tci);
cookie.sflow.output = output;
odp_put_userspace_action(pid, &cookie, actions);
return n;
} else if (sscanf(s, "userspace(pid=%lli,slow_path%n", &pid, &n) > 0
&& n > 0) {
union user_action_cookie cookie;
int res;
cookie.type = USER_ACTION_COOKIE_SLOW_PATH;
cookie.slow_path.unused = 0;
cookie.slow_path.reason = 0;
res = parse_flags(&s[n], slow_path_reason_to_string,
&cookie.slow_path.reason);
if (res < 0) {
return res;
}
n += res;
if (s[n] != ')') {
return -EINVAL;
}
n++;
odp_put_userspace_action(pid, &cookie, actions);
return n;
} else if (sscanf(s, "userspace(pid=%lli,userdata="
"%31[x0123456789abcdefABCDEF])%n", &pid, userdata_s,
&n) > 0 && n > 0) {
union user_action_cookie cookie;
uint64_t userdata;
userdata = strtoull(userdata_s, NULL, 0);
memcpy(&cookie, &userdata, sizeof cookie);
odp_put_userspace_action(pid, &cookie, actions);
return n;
}
}
if (!strncmp(s, "set(", 4)) {
size_t start_ofs;
int retval;
start_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SET);
retval = parse_odp_key_attr(s + 4, port_names, actions);
if (retval < 0) {
return retval;
}
if (s[retval + 4] != ')') {
return -EINVAL;
}
nl_msg_end_nested(actions, start_ofs);
return retval + 5;
}
{
struct ovs_action_push_vlan push;
int tpid = ETH_TYPE_VLAN;
int vid, pcp;
int cfi = 1;
int n = -1;
if ((sscanf(s, "push_vlan(vid=%i,pcp=%i)%n", &vid, &pcp, &n) > 0
&& n > 0)
|| (sscanf(s, "push_vlan(vid=%i,pcp=%i,cfi=%i)%n",
&vid, &pcp, &cfi, &n) > 0 && n > 0)
|| (sscanf(s, "push_vlan(tpid=%i,vid=%i,pcp=%i)%n",
&tpid, &vid, &pcp, &n) > 0 && n > 0)
|| (sscanf(s, "push_vlan(tpid=%i,vid=%i,pcp=%i,cfi=%i)%n",
&tpid, &vid, &pcp, &cfi, &n) > 0 && n > 0)) {
push.vlan_tpid = htons(tpid);
push.vlan_tci = htons((vid << VLAN_VID_SHIFT)
| (pcp << VLAN_PCP_SHIFT)
| (cfi ? VLAN_CFI : 0));
nl_msg_put_unspec(actions, OVS_ACTION_ATTR_PUSH_VLAN,
&push, sizeof push);
return n;
}
}
if (!strncmp(s, "pop_vlan", 8)) {
nl_msg_put_flag(actions, OVS_ACTION_ATTR_POP_VLAN);
return 8;
}
{
double percentage;
int n = -1;
if (sscanf(s, "sample(sample=%lf%%,actions(%n", &percentage, &n) > 0
&& percentage >= 0. && percentage <= 100.0
&& n > 0) {
size_t sample_ofs, actions_ofs;
double probability;
probability = floor(UINT32_MAX * (percentage / 100.0) + .5);
sample_ofs = nl_msg_start_nested(actions, OVS_ACTION_ATTR_SAMPLE);
nl_msg_put_u32(actions, OVS_SAMPLE_ATTR_PROBABILITY,
(probability <= 0 ? 0
: probability >= UINT32_MAX ? UINT32_MAX
: probability));
actions_ofs = nl_msg_start_nested(actions,
OVS_SAMPLE_ATTR_ACTIONS);
for (;;) {
int retval;
n += strspn(s + n, delimiters);
if (s[n] == ')') {
break;
}
retval = parse_odp_action(s + n, port_names, actions);
if (retval < 0) {
return retval;
}
n += retval;
}
nl_msg_end_nested(actions, actions_ofs);
nl_msg_end_nested(actions, sample_ofs);
return s[n + 1] == ')' ? n + 2 : -EINVAL;
}
}
return -EINVAL;
}
/* Parses the string representation of datapath actions, in the format output
* by format_odp_action(). Returns 0 if successful, otherwise a positive errno
* value. On success, the ODP actions are appended to 'actions' as a series of
* Netlink attributes. On failure, no data is appended to 'actions'. Either
* way, 'actions''s data might be reallocated. */
int
odp_actions_from_string(const char *s, const struct simap *port_names,
struct ofpbuf *actions)
{
size_t old_size;
if (!strcasecmp(s, "drop")) {
return 0;
}
old_size = actions->size;
for (;;) {
int retval;
s += strspn(s, delimiters);
if (!*s) {
return 0;
}
retval = parse_odp_action(s, port_names, actions);
if (retval < 0 || !strchr(delimiters, s[retval])) {
actions->size = old_size;
return -retval;
}
s += retval;
}
return 0;
}
/* Returns the correct length of the payload for a flow key attribute of the
* specified 'type', -1 if 'type' is unknown, or -2 if the attribute's payload
* is variable length. */
static int
odp_flow_key_attr_len(uint16_t type)
{
if (type > OVS_KEY_ATTR_MAX) {
return -1;
}
switch ((enum ovs_key_attr) type) {
case OVS_KEY_ATTR_ENCAP: return -2;
case OVS_KEY_ATTR_PRIORITY: return 4;
case OVS_KEY_ATTR_SKB_MARK: return 4;
case OVS_KEY_ATTR_TUN_ID: return 8;
case OVS_KEY_ATTR_IPV4_TUNNEL: return sizeof(struct ovs_key_ipv4_tunnel);
case OVS_KEY_ATTR_IN_PORT: return 4;
case OVS_KEY_ATTR_ETHERNET: return sizeof(struct ovs_key_ethernet);
case OVS_KEY_ATTR_VLAN: return sizeof(ovs_be16);
case OVS_KEY_ATTR_ETHERTYPE: return 2;
case OVS_KEY_ATTR_IPV4: return sizeof(struct ovs_key_ipv4);
case OVS_KEY_ATTR_IPV6: return sizeof(struct ovs_key_ipv6);
case OVS_KEY_ATTR_TCP: return sizeof(struct ovs_key_tcp);
case OVS_KEY_ATTR_UDP: return sizeof(struct ovs_key_udp);
case OVS_KEY_ATTR_ICMP: return sizeof(struct ovs_key_icmp);
case OVS_KEY_ATTR_ICMPV6: return sizeof(struct ovs_key_icmpv6);
case OVS_KEY_ATTR_ARP: return sizeof(struct ovs_key_arp);
case OVS_KEY_ATTR_ND: return sizeof(struct ovs_key_nd);
case OVS_KEY_ATTR_UNSPEC:
case __OVS_KEY_ATTR_MAX:
return -1;
}
return -1;
}
static void
format_generic_odp_key(const struct nlattr *a, struct ds *ds)
{
size_t len = nl_attr_get_size(a);
if (len) {
const uint8_t *unspec;
unsigned int i;
unspec = nl_attr_get(a);
for (i = 0; i < len; i++) {
ds_put_char(ds, i ? ' ': '(');
ds_put_format(ds, "%02x", unspec[i]);
}
ds_put_char(ds, ')');
}
}
static const char *
ovs_frag_type_to_string(enum ovs_frag_type type)
{
switch (type) {
case OVS_FRAG_TYPE_NONE:
return "no";
case OVS_FRAG_TYPE_FIRST:
return "first";
case OVS_FRAG_TYPE_LATER:
return "later";
case __OVS_FRAG_TYPE_MAX:
default:
return "<error>";
}
}
static const char *
odp_tun_flag_to_string(uint32_t flags)
{
switch (flags) {
case OVS_TNL_F_DONT_FRAGMENT:
return "df";
case OVS_TNL_F_CSUM:
return "csum";
case OVS_TNL_F_KEY:
return "key";
default:
return NULL;
}
}
static void
format_odp_key_attr(const struct nlattr *a, struct ds *ds)
{
const struct ovs_key_ethernet *eth_key;
const struct ovs_key_ipv4 *ipv4_key;
const struct ovs_key_ipv6 *ipv6_key;
const struct ovs_key_tcp *tcp_key;
const struct ovs_key_udp *udp_key;
const struct ovs_key_icmp *icmp_key;
const struct ovs_key_icmpv6 *icmpv6_key;
const struct ovs_key_arp *arp_key;
const struct ovs_key_nd *nd_key;
const struct ovs_key_ipv4_tunnel *ipv4_tun_key;
enum ovs_key_attr attr = nl_attr_type(a);
int expected_len;
ds_put_cstr(ds, ovs_key_attr_to_string(attr));
expected_len = odp_flow_key_attr_len(nl_attr_type(a));
if (expected_len != -2 && nl_attr_get_size(a) != expected_len) {
ds_put_format(ds, "(bad length %zu, expected %d)",
nl_attr_get_size(a),
odp_flow_key_attr_len(nl_attr_type(a)));
format_generic_odp_key(a, ds);
return;
}
switch (attr) {
case OVS_KEY_ATTR_ENCAP:
ds_put_cstr(ds, "(");
if (nl_attr_get_size(a)) {
odp_flow_key_format(nl_attr_get(a), nl_attr_get_size(a), ds);
}
ds_put_char(ds, ')');
break;
case OVS_KEY_ATTR_PRIORITY:
ds_put_format(ds, "(%"PRIu32")", nl_attr_get_u32(a));
break;
case OVS_KEY_ATTR_SKB_MARK:
ds_put_format(ds, "(%"PRIu32")", nl_attr_get_u32(a));
break;
case OVS_KEY_ATTR_TUN_ID:
ds_put_format(ds, "(%#"PRIx64")", ntohll(nl_attr_get_be64(a)));
break;
case OVS_KEY_ATTR_IPV4_TUNNEL:
ipv4_tun_key = nl_attr_get(a);
ds_put_format(ds, "(tun_id=0x%"PRIx64",src="IP_FMT",dst="IP_FMT","
"tos=0x%"PRIx8",ttl=%"PRIu8",flags(",
ntohll(ipv4_tun_key->tun_id),
IP_ARGS(&ipv4_tun_key->ipv4_src),
IP_ARGS(&ipv4_tun_key->ipv4_dst),
ipv4_tun_key->ipv4_tos, ipv4_tun_key->ipv4_ttl);
format_flags(ds, odp_tun_flag_to_string,
ipv4_tun_key->tun_flags, ',');
ds_put_format(ds, "))");
break;
case OVS_KEY_ATTR_IN_PORT:
ds_put_format(ds, "(%"PRIu32")", nl_attr_get_u32(a));
break;
case OVS_KEY_ATTR_ETHERNET:
eth_key = nl_attr_get(a);
ds_put_format(ds, "(src="ETH_ADDR_FMT",dst="ETH_ADDR_FMT")",
ETH_ADDR_ARGS(eth_key->eth_src),
ETH_ADDR_ARGS(eth_key->eth_dst));
break;
case OVS_KEY_ATTR_VLAN:
ds_put_char(ds, '(');
format_vlan_tci(ds, nl_attr_get_be16(a));
ds_put_char(ds, ')');
break;
case OVS_KEY_ATTR_ETHERTYPE:
ds_put_format(ds, "(0x%04"PRIx16")",
ntohs(nl_attr_get_be16(a)));
break;
case OVS_KEY_ATTR_IPV4:
ipv4_key = nl_attr_get(a);
ds_put_format(ds, "(src="IP_FMT",dst="IP_FMT",proto=%"PRIu8
",tos=%#"PRIx8",ttl=%"PRIu8",frag=%s)",
IP_ARGS(&ipv4_key->ipv4_src),
IP_ARGS(&ipv4_key->ipv4_dst),
ipv4_key->ipv4_proto, ipv4_key->ipv4_tos,
ipv4_key->ipv4_ttl,
ovs_frag_type_to_string(ipv4_key->ipv4_frag));
break;
case OVS_KEY_ATTR_IPV6: {
char src_str[INET6_ADDRSTRLEN];
char dst_str[INET6_ADDRSTRLEN];
ipv6_key = nl_attr_get(a);
inet_ntop(AF_INET6, ipv6_key->ipv6_src, src_str, sizeof src_str);
inet_ntop(AF_INET6, ipv6_key->ipv6_dst, dst_str, sizeof dst_str);
ds_put_format(ds, "(src=%s,dst=%s,label=%#"PRIx32",proto=%"PRIu8
",tclass=%#"PRIx8",hlimit=%"PRIu8",frag=%s)",
src_str, dst_str, ntohl(ipv6_key->ipv6_label),
ipv6_key->ipv6_proto, ipv6_key->ipv6_tclass,
ipv6_key->ipv6_hlimit,
ovs_frag_type_to_string(ipv6_key->ipv6_frag));
break;
}
case OVS_KEY_ATTR_TCP:
tcp_key = nl_attr_get(a);
ds_put_format(ds, "(src=%"PRIu16",dst=%"PRIu16")",
ntohs(tcp_key->tcp_src), ntohs(tcp_key->tcp_dst));
break;
case OVS_KEY_ATTR_UDP:
udp_key = nl_attr_get(a);
ds_put_format(ds, "(src=%"PRIu16",dst=%"PRIu16")",
ntohs(udp_key->udp_src), ntohs(udp_key->udp_dst));
break;
case OVS_KEY_ATTR_ICMP:
icmp_key = nl_attr_get(a);
ds_put_format(ds, "(type=%"PRIu8",code=%"PRIu8")",
icmp_key->icmp_type, icmp_key->icmp_code);
break;
case OVS_KEY_ATTR_ICMPV6:
icmpv6_key = nl_attr_get(a);
ds_put_format(ds, "(type=%"PRIu8",code=%"PRIu8")",
icmpv6_key->icmpv6_type, icmpv6_key->icmpv6_code);
break;
case OVS_KEY_ATTR_ARP:
arp_key = nl_attr_get(a);
ds_put_format(ds, "(sip="IP_FMT",tip="IP_FMT",op=%"PRIu16","
"sha="ETH_ADDR_FMT",tha="ETH_ADDR_FMT")",
IP_ARGS(&arp_key->arp_sip), IP_ARGS(&arp_key->arp_tip),
ntohs(arp_key->arp_op), ETH_ADDR_ARGS(arp_key->arp_sha),
ETH_ADDR_ARGS(arp_key->arp_tha));
break;
case OVS_KEY_ATTR_ND: {
char target[INET6_ADDRSTRLEN];
nd_key = nl_attr_get(a);
inet_ntop(AF_INET6, nd_key->nd_target, target, sizeof target);
ds_put_format(ds, "(target=%s", target);
if (!eth_addr_is_zero(nd_key->nd_sll)) {
ds_put_format(ds, ",sll="ETH_ADDR_FMT,
ETH_ADDR_ARGS(nd_key->nd_sll));
}
if (!eth_addr_is_zero(nd_key->nd_tll)) {
ds_put_format(ds, ",tll="ETH_ADDR_FMT,
ETH_ADDR_ARGS(nd_key->nd_tll));
}
ds_put_char(ds, ')');
break;
}
case OVS_KEY_ATTR_UNSPEC:
case __OVS_KEY_ATTR_MAX:
default:
format_generic_odp_key(a, ds);
break;
}
}
/* Appends to 'ds' a string representation of the 'key_len' bytes of
* OVS_KEY_ATTR_* attributes in 'key'. */
void
odp_flow_key_format(const struct nlattr *key, size_t key_len, struct ds *ds)
{
if (key_len) {
const struct nlattr *a;
unsigned int left;
NL_ATTR_FOR_EACH (a, left, key, key_len) {
if (a != key) {
ds_put_char(ds, ',');
}
format_odp_key_attr(a, ds);
}
if (left) {
int i;
if (left == key_len) {
ds_put_cstr(ds, "<empty>");
}
ds_put_format(ds, ",***%u leftover bytes*** (", left);
for (i = 0; i < left; i++) {
ds_put_format(ds, "%02x", ((const uint8_t *) a)[i]);
}
ds_put_char(ds, ')');
}
} else {
ds_put_cstr(ds, "<empty>");
}
}
static int
put_nd_key(int n, const char *nd_target_s,
const uint8_t *nd_sll, const uint8_t *nd_tll, struct ofpbuf *key)
{
struct ovs_key_nd nd_key;
memset(&nd_key, 0, sizeof nd_key);
if (inet_pton(AF_INET6, nd_target_s, nd_key.nd_target) != 1) {
return -EINVAL;
}
if (nd_sll) {
memcpy(nd_key.nd_sll, nd_sll, ETH_ADDR_LEN);
}
if (nd_tll) {
memcpy(nd_key.nd_tll, nd_tll, ETH_ADDR_LEN);
}
nl_msg_put_unspec(key, OVS_KEY_ATTR_ND, &nd_key, sizeof nd_key);
return n;
}
static bool
ovs_frag_type_from_string(const char *s, enum ovs_frag_type *type)
{
if (!strcasecmp(s, "no")) {
*type = OVS_FRAG_TYPE_NONE;
} else if (!strcasecmp(s, "first")) {
*type = OVS_FRAG_TYPE_FIRST;
} else if (!strcasecmp(s, "later")) {
*type = OVS_FRAG_TYPE_LATER;
} else {
return false;
}
return true;
}
static int
parse_odp_key_attr(const char *s, const struct simap *port_names,
struct ofpbuf *key)
{
/* Many of the sscanf calls in this function use oversized destination
* fields because some sscanf() implementations truncate the range of %i
* directives, so that e.g. "%"SCNi16 interprets input of "0xfedc" as a
* value of 0x7fff. The other alternatives are to allow only a single
* radix (e.g. decimal or hexadecimal) or to write more sophisticated
* parsers.
*
* The tun_id parser has to use an alternative approach because there is no
* type larger than 64 bits. */
{
unsigned long long int priority;
int n = -1;
if (sscanf(s, "priority(%lli)%n", &priority, &n) > 0 && n > 0) {
nl_msg_put_u32(key, OVS_KEY_ATTR_PRIORITY, priority);
return n;
}
}
{
unsigned long long int mark;
int n = -1;
if (sscanf(s, "skb_mark(%lli)%n", &mark, &n) > 0 && n > 0) {
nl_msg_put_u32(key, OVS_KEY_ATTR_SKB_MARK, mark);
return n;
}
}
{
char tun_id_s[32];
int n = -1;
if (sscanf(s, "tun_id(%31[x0123456789abcdefABCDEF])%n",
tun_id_s, &n) > 0 && n > 0) {
uint64_t tun_id = strtoull(tun_id_s, NULL, 0);
nl_msg_put_be64(key, OVS_KEY_ATTR_TUN_ID, htonll(tun_id));
return n;
}
}
{
char tun_id_s[32];
int tos, ttl;
struct ovs_key_ipv4_tunnel tun_key;
int n = -1;
if (sscanf(s, "ipv4_tunnel(tun_id=%31[x0123456789abcdefABCDEF],"
"src="IP_SCAN_FMT",dst="IP_SCAN_FMT
",tos=%i,ttl=%i,flags%n", tun_id_s,
IP_SCAN_ARGS(&tun_key.ipv4_src),
IP_SCAN_ARGS(&tun_key.ipv4_dst), &tos, &ttl,
&n) > 0 && n > 0) {
int res;
tun_key.tun_id = htonll(strtoull(tun_id_s, NULL, 0));
tun_key.ipv4_tos = tos;
tun_key.ipv4_ttl = ttl;
res = parse_flags(&s[n], odp_tun_flag_to_string,
&tun_key.tun_flags);
if (res < 0) {
return res;
}
n += res;
if (s[n] != ')') {
return -EINVAL;
}