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/*
* Copyright (c) 2021 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.
*/
#ifndef HICNCTRL_HICN_LIGHT_COMMON
#define HICNCTRL_HICN_LIGHT_COMMON
#include <assert.h> // assert
#include "api_private.h"
#define PORT 9695
#define BOOLSTR(x) ((x) ? "true" : "false")
/*
* Internal state associated to a pending request
*/
typedef struct {
int seq;
hc_data_t *data;
int (*parse)(const u8 *src, u8 *dst);
} hc_sock_request_t;
/**
* Messages to the forwarder might be multiplexed thanks to the seqNum fields in
* the header_control_message structure. The forwarder simply answers back the
* original sequence number. We maintain a map of such sequence number to
* outgoing queries so that replied can be demultiplexed and treated
* appropriately.
*/
TYPEDEF_MAP_H(hc_sock_map, int, hc_sock_request_t *);
struct hc_sock_light_s {
/* This must be the first element of the struct */
hc_sock_t vft;
char *url;
int fd;
/* Partial receive buffer */
u8 buf[RECV_BUFLEN];
size_t roff; /**< Read offset */
size_t woff; /**< Write offset */
/*
* Because received messages are potentially unbounded in size, we might not
* guarantee that we can store a full packet before processing it. We must
* implement a very simple state machine remembering the current parsing
* status in order to partially process the packet.
*/
size_t remaining;
u32 send_id;
/* Next sequence number to be used for requests */
int seq;
/* Request being parsed (NULL if none) */
hc_sock_request_t *cur_request;
bool async;
hc_sock_map_t *map;
};
typedef struct hc_sock_light_s hc_sock_light_t;
#define TO_HC_SOCK_LIGHT(s) (hc_sock_light_t *)(s)
hc_sock_request_t *hc_sock_request_create(int seq, hc_data_t *data,
HC_PARSE parse);
void hc_sock_light_request_free(hc_sock_request_t *request);
/*
* list was working with all seq set to 0, but it seems hicnLightControl uses
* 1, and replies with the same seqno
*/
#define HICN_CTRL_SEND_SEQ_INIT 1
#define HICN_CTRL_RECV_SEQ_INIT 1
#define MAX(x, y) ((x > y) ? x : y)
static const struct in6_addr loopback_addr = IN6ADDR_LOOPBACK_INIT;
#endif /* HICNCTRL_HICN_LIGHT_COMMON */
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