[PATCH V3 net-next 1/5] icmp: add support for RFC 8335 PROBE
flat view
STALE2051d
From: Andreas Roeseler <hidden>
Date: 2021-02-17 18:08:50
Subsystem:
the rest · Maintainer:
Linus Torvalds
Revision v3 of 5 in this series.
Revisions (5)
Add definitions for PROBE ICMP types and codes. Add AFI definitions for IP and IPV6 as specified by IANA Add a struct to represent the additional header when probing by IP address (ctype == 3) for use in parsing incoming PROBE messages. Add a struct to represent the entire Interface Identification Object (IIO) section of an incoming PROBE packet Signed-off-by: Andreas Roeseler <redacted> --- Changes since v1: - Add AFI_IP and AFI_IP6 definitions Changes since v2: Suggested by Willem de Brujin [off-list ref] - Add prefix for PROBE specific defined variables - Create struct icmp_ext_echo_iio for parsing incoming packet --- include/uapi/linux/icmp.h | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+)
diff --git a/include/uapi/linux/icmp.h b/include/uapi/linux/icmp.h
index fb169a50895e..166ca77561de 100644
--- a/include/uapi/linux/icmp.h
+++ b/include/uapi/linux/icmp.h@@ -66,6 +66,23 @@ #define ICMP_EXC_TTL 0 /* TTL count exceeded */ #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ +/* Codes for EXT_ECHO (PROBE) */ +#define ICMP_EXT_ECHO 42 +#define ICMP_EXT_ECHOREPLY 43 +#define ICMP_EXT_MAL_QUERY 1 /* Malformed Query */ +#define ICMP_EXT_NO_IF 2 /* No such Interface */ +#define ICMP_EXT_NO_TABLE_ENT 3 /* No such Table Entry */ +#define ICMP_EXT_MULT_IFS 4 /* Multiple Interfaces Satisfy Query */ + +/* constants for EXT_ECHO (PROBE) */ +#define EXT_ECHOREPLY_ACTIVE (1 << 2)/* position of active flag in reply */ +#define EXT_ECHOREPLY_IPV4 (1 << 1)/* position of ipv4 flag in reply */ +#define EXT_ECHOREPLY_IPV6 1 /* position of ipv6 flag in reply */ +#define EXT_ECHO_CTYPE_NAME 1 +#define EXT_ECHO_CTYPE_INDEX 2 +#define EXT_ECHO_CTYPE_ADDR 3 +#define EXT_ECHO_AFI_IP 1 /* Address Family Identifier for IPV4 */ +#define EXT_ECHO_AFI_IP6 2 /* Address Family Identifier for IPV6 */ struct icmphdr { __u8 type;
@@ -118,4 +135,27 @@ struct icmp_extobj_hdr { __u8 class_type; }; +/* RFC 8335: 2.1 Header for C-type 3 payload */ +struct icmp_ext_echo_ctype3_hdr { + __u16 afi; + __u8 addrlen; + __u8 reserved; +}; + +/* RFC 8335: Interface Identification Object */ +struct icmp_ext_echo_iio { + struct icmp_extobj_hdr extobj_hdr; + union { + __u32 ifIndex; + char name; + struct { + struct icmp_ext_echo_ctype3_hdr ctype3_hdr; + union { + __be32 ipv4_addr; + struct in6_addr ipv6_addr; + } ip_addr; + } addr; + } ident; +}; + #endif /* _UAPI_LINUX_ICMP_H */
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2.25.1