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https://github.com/xdp-project/bpf-examples.git
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1446e6edec
Load and pin the tc-bpf program in pping.c using libbpf, and only attach the pinned program using iproute. That way, can use features that are not supported by the old iproute loader, even if iproute does not have libbpf support. To support this change, extend bpf_egress_loader with option to load pinned program. Additionally, remove configure script and parts of Makefile that are no longer needed. Furthermore, remove multiple definitions of ts_start map, and place singular definition in pping_helpers.h which is included by both BPF programs. Also, some minor fixes based on Toke's review. Signed-off-by: Simon Sundberg <simon.sundberg@kau.se>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef PPING_H
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#define PPING_H
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#include <linux/types.h>
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#include <linux/in6.h>
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#define XDP_PROG_SEC "xdp"
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#define TCBPF_PROG_SEC "classifier"
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/*
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* Struct that can hold the source or destination address for a flow (l3+l4).
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* Works for both IPv4 and IPv6, as IPv4 addresses can be mapped to IPv6 ones
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* based on RFC 4291 Section 2.5.5.2.
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*/
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struct flow_address {
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struct in6_addr ip;
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__u16 port;
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__u16 reserved;
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};
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/*
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* Struct to hold a full network tuple
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* The ipv member is technically not necessary, but makes it easier to
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* determine if saddr/daddr are IPv4 or IPv6 address (don't need to look at the
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* first 12 bytes of address). The proto memeber is not currently used, but
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* could be useful once pping is extended to work for other protocols than TCP.
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*/
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struct network_tuple {
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struct flow_address saddr;
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struct flow_address daddr;
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__u16 proto; //IPPROTO_TCP, IPPROTO_ICMP, QUIC etc
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__u8 ipv; //AF_INET or AF_INET6
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__u8 reserved;
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};
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struct flow_state {
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__u64 last_timestamp;
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__u32 last_id;
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__u32 reserved;
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};
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struct packet_id {
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struct network_tuple flow;
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__u32 identifier; //tsval for TCP packets
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};
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struct rtt_event {
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__u64 rtt;
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struct network_tuple flow;
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__u32 reserved;
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};
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#endif
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