@@ -20,6 +20,9 @@
#include <linux/types.h>
#include <asm/byteorder.h>
+#include <linux/in.h>
+#include <linux/if.h>
+#include <linux/in6.h>
#define ICMP_ECHOREPLY 0 /* Echo Reply */
#define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
@@ -66,6 +69,23 @@
#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)/* active bit in reply message */
+#define EXT_ECHOREPLY_IPV4 (1 << 1)/* ipv4 bit in reply message */
+#define EXT_ECHOREPLY_IPV6 1 /* ipv6 bit in reply message */
+#define EXT_ECHO_CTYPE_NAME 1
+#define EXT_ECHO_CTYPE_INDEX 2
+#define EXT_ECHO_CTYPE_ADDR 3
+#define ICMP_AFI_IP 1 /* Address Family Identifier for ipv4 */
+#define ICMP_AFI_IP6 2 /* Address Family Identifier for ipv6 */
struct icmphdr {
__u8 type;
@@ -118,4 +138,26 @@ struct icmp_extobj_hdr {
__u8 class_type;
};
+/* RFC 8335: 2.1 Header for c-type 3 payload */
+struct icmp_ext_echo_ctype3_hdr {
+ __be16 afi;
+ __u8 addrlen;
+ __u8 reserved;
+};
+
+/* RFC 8335: 2.1 Interface Identification Object */
+struct icmp_ext_echo_iio {
+ struct icmp_extobj_hdr extobj_hdr;
+ union {
+ char name[IFNAMSIZ];
+ __be32 ifindex;
+ struct {
+ struct icmp_ext_echo_ctype3_hdr ctype3_hdr;
+ union {
+ struct in_addr ipv4_addr;
+ struct in6_addr ipv6_addr;
+ } ip_addr;
+ } addr;
+ } ident;
+};
#endif /* _UAPI_LINUX_ICMP_H */
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 <andreas.a.roeseler@gmail.com> --- Changes: v1 -> v2: - Add AFI_IP and AFI_IP6 definitions v2 -> v3: Suggested by Willem de Bruijn <willemdebruijn.kernel@gmail.com> - Add prefix for PROBE specific defined variables - Create struct icmp_ext_echo_iio for parsing incoming packet v3 -> v4: - Use in_addr instead of __be32 for storing IPV4 addresses - Use IFNAMSIZ to statically allocate space for name in icmp_ext_echo_iio v4 -> v5: - Use __be32 instead of __u32 in defined structs --- include/uapi/linux/icmp.h | 42 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+)