lwIP
2.1.0
Lightweight IP stack
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#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/udp.h"
#include "lwip/mem.h"
#include "lwip/memp.h"
#include "lwip/dns.h"
#include "lwip/prot/dns.h"
#include <string.h>
Data Structures | |
struct | dns_query |
struct | dns_answer |
struct | dns_table_entry |
struct | dns_req_entry |
Macros | |
#define | DNS_RAND_TXID LWIP_RAND |
#define | DNS_PORT_ALLOWED(port) ((port) >= 1024) |
#define | DNS_MAX_TTL 604800 |
Functions | |
void | dns_init (void) |
void | dns_setserver (u8_t numdns, const ip_addr_t *dnsserver) |
const ip_addr_t * | dns_getserver (u8_t numdns) |
void | dns_tmr (void) |
err_t | dns_gethostbyname (const char *hostname, ip_addr_t *addr, dns_found_callback found, void *callback_arg) |
err_t | dns_gethostbyname_addrtype (const char *hostname, ip_addr_t *addr, dns_found_callback found, void *callback_arg, u8_t dns_addrtype) |
DNS - host name to IP address resolver.
#define DNS_MAX_TTL 604800 |
DNS resource record max. TTL (one week as default)
#define DNS_PORT_ALLOWED | ( | port | ) | ((port) >= 1024) |
Limits the source port to be >= 1024 by default
#define DNS_RAND_TXID LWIP_RAND |
Random generator function to create random TXIDs and source ports for queries
void dns_init | ( | void | ) |
Initialize the resolver: set up the UDP pcb and configure the default server (if DNS_SERVER_ADDRESS is set).
void dns_tmr | ( | void | ) |
The DNS resolver client timer - handle retries and timeouts and should be called every DNS_TMR_INTERVAL milliseconds (every second by default).