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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* 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.
*/
/**
* \file policy.h
* \brief Policy description
*/
#ifndef HICN_POLICY_H
#define HICN_POLICY_H
#include <netinet/in.h> // INET*_ADDRSTRLEN
#include <string.h> // strcasecmp
#include "token.h"
/* POLICY TAG */
#define foreach_policy_tag \
/* Interface type */ \
_(WIRED, 'E') \
_(WIFI, 'W') \
_(CELLULAR, 'C') \
/* QoS */ \
_(BEST_EFFORT, 'b') \
_(REALTIME, 'r') \
_(MULTIPATH, 'M') \
/* Security */ \
_(TRUSTED, 'T')
typedef enum {
#define _(x, y) POLICY_TAG_ ## x,
foreach_policy_tag
#undef _
POLICY_TAG_N
} policy_tag_t;
#define MAXSZ_POLICY_TAG_ 11
#define MAXSZ_POLICY_TAG MAXSZ_POLICY_TAG_ + 1
extern const char * policy_tag_str[];
extern const char policy_tag_short_str[];
static inline
policy_tag_t
policy_tag_from_str(const char * str)
{
#define _(x, y) if (strcasecmp(str, policy_tag_str[POLICY_TAG_ ## x] ) == 0) { return POLICY_TAG_ ## x; } else
foreach_policy_tag
#undef _
return POLICY_TAG_N;
}
/* POLICY_TAGS */
typedef int policy_tags_t;
static inline
void policy_tags_add(policy_tags_t * tags, policy_tag_t tag)
{
*tags |= (1 << tag);
}
static inline
void policy_tags_remove(policy_tags_t * tags, policy_tag_t tag)
{
*tags &= ~(1 << tag);
}
static inline
int policy_tags_has(policy_tags_t tags, policy_tag_t tag)
{
return tags & (1 << tag);
}
#define POLICY_TAGS_EMPTY 0
static inline
int
policy_tags_snprintf(char * s, size_t size, policy_tags_t tags)
{
#define _(x, y) s[POLICY_TAG_ ## x] = policy_tags_has(tags, POLICY_TAG_ ## x) ? y : '.';
foreach_policy_tag
#undef _
s[POLICY_TAG_N] = '\0';
return POLICY_TAG_N + 1;
}
#define MAXSZ_POLICY_TAGS_ POLICY_TAG_N
#define MAXSZ_POLICY_TAGS MAXSZ_POLICY_TAGS_ + 1
/* POLICY STATE */
/* TODO vs. weight */
#define foreach_policy_state \
_(NEUTRAL) \
_(REQUIRE) \
_(PREFER) \
_(AVOID) \
_(PROHIBIT) \
_(N)
typedef enum {
#define _(x) POLICY_STATE_ ## x,
foreach_policy_state
#undef _
} policy_state_t;
#define MAXSZ_POLICY_STATE_ 8
#define MAXSZ_POLICY_STATE MAXSZ_POLICY_STATE_ + 1
extern const char * policy_state_str[];
/* POLICY TAG STATE */
typedef struct {
policy_state_t state;
uint8_t disabled;
} policy_tag_state_t;
#define MAXSZ_POLICY_TAG_STATE_ 8
#define MAXSZ_POLICY_TAG_STATE MAXSZ_POLICY_TAG_STATE_ + 1
int policy_tag_state_snprintf(char * s, size_t size, const policy_tag_state_t * tag_state);
/* INTERFACE STATS */
typedef struct {
float throughput;
float latency;
float loss_rate;
} interface_stats_t;
#define INTERFACE_STATS_NONE { \
.throughput = 0, \
.latency = 0, \
.loss_rate = 0, \
}
/* POLICY STATS */
typedef struct {
interface_stats_t wired;
interface_stats_t wifi;
interface_stats_t cellular;
interface_stats_t all;
} policy_stats_t;
#define POLICY_STATS_NONE { \
.wired = INTERFACE_STATS_NONE, \
.wifi = INTERFACE_STATS_NONE, \
.cellular = INTERFACE_STATS_NONE, \
.all = INTERFACE_STATS_NONE, \
}
typedef struct {
uint32_t num_packets;
uint32_t num_bytes;
uint32_t num_losses;
uint32_t latency_idle;
} interface_counters_t;
#define INTERFACE_COUNTERS_NONE { \
.num_packets = 0, \
.num_bytes = 0, \
.num_losses = 0, \
.latency_idle = 0, \
}
typedef struct {
interface_counters_t wired;
interface_counters_t wifi;
interface_counters_t cellular;
interface_counters_t all;
uint64_t last_update;
} policy_counters_t;
#define POLICY_COUNTERS_NONE (policy_counters_t) { \
.wired = INTERFACE_COUNTERS_NONE, \
.wifi = INTERFACE_COUNTERS_NONE, \
.cellular = INTERFACE_COUNTERS_NONE, \
.all = INTERFACE_COUNTERS_NONE, \
.last_update = 0, \
}
/* POLICY */
#define APP_NAME_LEN 128
typedef struct {
char app_name[APP_NAME_LEN];
policy_tag_state_t tags[POLICY_TAG_N];
policy_stats_t stats;
} policy_t;
static const policy_t POLICY_NONE = {
.app_name = { 0 },
.tags = {
#define _(x, y) [POLICY_TAG_ ## x] = { POLICY_STATE_NEUTRAL, 0 },
foreach_policy_tag
#undef _
},
.stats = POLICY_STATS_NONE,
};
/* POLICY DESCRIPTION */
#define PFX_STRLEN 4 /* eg. /128 */
typedef struct {
int family;
union {
char ipv4_prefix[INET_ADDRSTRLEN + PFX_STRLEN];
char ipv6_prefix[INET6_ADDRSTRLEN + PFX_STRLEN];
};
policy_t policy;
} policy_description_t;
#endif /* HICN_POLICY_H */
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