lc.h

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/*
 * Copyright (C) 2018 HAW Hamburg
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once
 
#include "net/sock/udp.h"
#include "net/nanocoap.h"
#include "clif.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
enum {
    CORD_LC_OK        =  0,     
    CORD_LC_TIMEOUT   = -1,     
    CORD_LC_ERR       = -2,     
    CORD_LC_OVERFLOW  = -3,     
    CORD_LC_NORSC     = -4,     
};
 
enum {
    CORD_LC_RES,                
    CORD_LC_EP,                 
};
 
typedef struct {
    const sock_udp_ep_t *remote;        
    char *res_lookif;                   
    char *ep_lookif;                    
    unsigned res_last_page;             
    unsigned ep_last_page;              
} cord_lc_rd_t;
 
struct cord_lc_result {
    clif_t link;                
    clif_attr_t *attrs;         
    size_t max_attrs;           
};
 
typedef struct cord_lc_result cord_lc_res_t;    
typedef struct cord_lc_result cord_lc_ep_t;     
typedef struct cord_lc_filter {
    clif_attr_t *array;                     
    size_t len;                             
    struct cord_lc_filter *next;            
} cord_lc_filter_t;
 
int cord_lc_rd_init(cord_lc_rd_t *rd, void *buf, size_t maxlen,
                    const sock_udp_ep_t *remote);
 
ssize_t cord_lc_raw(const cord_lc_rd_t *rd, unsigned content_format,
                    unsigned lookup_type, cord_lc_filter_t *filters,
                    void *result, size_t maxlen);
 
ssize_t _lookup_result(cord_lc_rd_t *rd, cord_lc_res_t *result,
                       cord_lc_filter_t *filters, void *buf, size_t maxlen,
                       unsigned type);
 
static inline ssize_t cord_lc_res(cord_lc_rd_t *rd, cord_lc_res_t *resource,
                                  cord_lc_filter_t *filters, void *buf,
                                  size_t maxlen)
{
    return _lookup_result(rd, resource, filters, buf, maxlen, CORD_LC_RES);
}
 
static inline ssize_t cord_lc_ep(cord_lc_rd_t *rd, cord_lc_ep_t *endpoint,
                                 cord_lc_filter_t *filters, void *buf,
                                 size_t maxlen)
{
    return _lookup_result(rd, endpoint, filters, buf, maxlen, CORD_LC_EP);
}
 
#ifdef __cplusplus
}
#endif