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nd6: add support for RDNSS option (as per RFC 6106)

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This commit is contained in:
sg
2016-12-14 22:12:14 +01:00
parent 4e3cf61571
commit 6b1950ec24
4 changed files with 67 additions and 0 deletions
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8
src/include/lwip/opt.h
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@@ -2378,6 +2378,14 @@
#define LWIP_ND6_TCP_REACHABILITY_HINTS 1
#endif
/**
* LWIP_ND6_RDNSS_MAX_DNS_SERVERS > 0: Use IPv6 Router Advertisement Recursive
* DNS Server Option (as per RFC 6106) to copy a defined maximum number of DNS
* servers to the DNS module.
*/
#if !defined LWIP_ND6_RDNSS_MAX_DNS_SERVERS || defined __DOXYGEN__
#define LWIP_ND6_RDNSS_MAX_DNS_SERVERS 0
#endif
/**
* @}
*/

23
src/include/lwip/prot/nd6.h
View File

@@ -247,6 +247,29 @@ PACK_STRUCT_END
# include "arch/epstruct.h"
#endif
/** Recursive DNS Server Option. */
#if LWIP_ND6_RDNSS_MAX_DNS_SERVERS
#define LWIP_RDNSS_OPTION_MAX_SERVERS LWIP_ND6_RDNSS_MAX_DNS_SERVERS
#else
#define LWIP_RDNSS_OPTION_MAX_SERVERS 1
#endif
#define ND6_OPTION_TYPE_RDNSS (25)
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct rdnss_option {
PACK_STRUCT_FLD_8(u8_t type);
PACK_STRUCT_FLD_8(u8_t length);
PACK_STRUCT_FIELD(u16_t reserved);
PACK_STRUCT_FIELD(u32_t lifetime);
PACK_STRUCT_FLD_S(ip6_addr_p_t rdnss_address[LWIP_RDNSS_OPTION_MAX_SERVERS]);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
#ifdef __cplusplus
}
#endif