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Improved DNS_LOCAL_HOSTLIST interface (bug #50325)

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This commit is contained in:
goldsimon 2017-02-17 10:08:49 +01:00
parent 19d63e6aa0
commit deaa6e9406
3 changed files with 57 additions and 5 deletions
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3
CHANGELOG
View File

@ -6,6 +6,9 @@ HISTORY
++ New features:
2017-02-17: Simon Goldschmidt
* Improved DNS_LOCAL_HOSTLIST interface
2017-02-10: David van Moolenbroek
* Implement UDP and RAW multicast support for IPv6 (core API, not netconn/sockets)

51
src/core/dns.c
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@ -280,6 +280,7 @@ DNS_LOCAL_HOSTLIST_STORAGE_PRE struct local_hostlist_entry local_hostlist_static
#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
static void dns_init_local(void);
static err_t dns_lookup_local(const char *hostname, ip_addr_t *addr LWIP_DNS_ADDRTYPE_ARG(u8_t dns_addrtype));
#endif /* DNS_LOCAL_HOSTLIST */
@ -430,6 +431,38 @@ dns_init_local(void)
#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC && defined(DNS_LOCAL_HOSTLIST_INIT) */
}
/**
* @ingroup dns
* Iterate the local host-list for a hostname.
*
* @param iterator_fn a function that is called for every entry in the local host-list
* @param iterator_arg 3rd argument passed to iterator_fn
* @return the number of entries in the local host-list
*/
size_t
dns_local_iterate(dns_found_callback iterator_fn, void *iterator_arg)
{
size_t i;
#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
struct local_hostlist_entry *entry = local_hostlist_dynamic;
i = 0;
while (entry != NULL) {
if (iterator_fn != NULL) {
iterator_fn(entry->name, &entry->addr, iterator_arg);
}
i++;
entry = entry->next;
}
#else /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
for (i = 0; i < LWIP_ARRAYSIZE(local_hostlist_static); i++) {
if (iterator_fn != NULL) {
iterator_fn(local_hostlist_static[i].name, &local_hostlist_static[i].addr, iterator_arg);
}
}
#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
return i;
}
/**
* @ingroup dns
* Scans the local host-list for a hostname.
@ -437,8 +470,20 @@ dns_init_local(void)
* @param hostname Hostname to look for in the local host-list
* @param addr the first IP address for the hostname in the local host-list or
* IPADDR_NONE if not found.
* @param dns_addrtype - LWIP_DNS_ADDRTYPE_IPV4_IPV6: try to resolve IPv4 (ATTENTION: no fallback here!)
* - LWIP_DNS_ADDRTYPE_IPV6_IPV4: try to resolve IPv6 (ATTENTION: no fallback here!)
* - LWIP_DNS_ADDRTYPE_IPV4: try to resolve IPv4 only
* - LWIP_DNS_ADDRTYPE_IPV6: try to resolve IPv6 only
* @return ERR_OK if found, ERR_ARG if not found
*/
err_t
dns_local_lookup(const char *hostname, ip_addr_t *addr, u8_t dns_addrtype)
{
LWIP_UNUSED_ARG(dns_addrtype);
return dns_lookup_local(hostname, addr LWIP_DNS_ADDRTYPE_ARG(dns_addrtype));
}
/* Internal implementation for dns_local_lookup and dns_lookup */
static err_t
dns_lookup_local(const char *hostname, ip_addr_t *addr LWIP_DNS_ADDRTYPE_ARG(u8_t dns_addrtype))
{
@ -1434,9 +1479,9 @@ dns_gethostbyname(const char *hostname, ip_addr_t *addr, dns_found_callback foun
* ERR_INPROGRESS is returned!)
* @param callback_arg argument to pass to the callback function
* @param dns_addrtype - LWIP_DNS_ADDRTYPE_IPV4_IPV6: try to resolve IPv4 first, try IPv6 if IPv4 fails only
* - LWIP_DNS_ADDRTYPE_IPV6_IPV4: try to resolve IPv6 first, try IPv4 if IPv6 fails only
* - LWIP_DNS_ADDRTYPE_IPV4: try to resolve IPv4 only
* - LWIP_DNS_ADDRTYPE_IPV6: try to resolve IPv6 only
* - LWIP_DNS_ADDRTYPE_IPV6_IPV4: try to resolve IPv6 first, try IPv4 if IPv6 fails only
* - LWIP_DNS_ADDRTYPE_IPV4: try to resolve IPv4 only
* - LWIP_DNS_ADDRTYPE_IPV6: try to resolve IPv6 only
*/
err_t
dns_gethostbyname_addrtype(const char *hostname, ip_addr_t *addr, dns_found_callback found,

8
src/include/lwip/dns.h
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@ -112,10 +112,14 @@ err_t dns_gethostbyname_addrtype(const char *hostname, ip_addr_t *add
u8_t dns_addrtype);
#if DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC
#if DNS_LOCAL_HOSTLIST
size_t dns_local_iterate(dns_found_callback iterator_fn, void *iterator_arg);
err_t dns_local_lookup(const char *hostname, ip_addr_t *addr, u8_t dns_addrtype);
#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
int dns_local_removehost(const char *hostname, const ip_addr_t *addr);
err_t dns_local_addhost(const char *hostname, const ip_addr_t *addr);
#endif /* DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
#endif /* DNS_LOCAL_HOSTLIST */
#ifdef __cplusplus
}