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https://github.com/xdp-project/bpf-examples.git
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93b6c0eafa
Merge the pping_kern_tc.c, pping_kern_xdp.c and pping_helpers.h into the single file pping_kern.c. Do not change any of the BPF code, except renaming the map ts_start to packet_ts. To handle both BPF programs kept in single ELF-file, change loading mechanism to extract and attach both tc and XDP programs from it. Also refactor main-method into several smaller functions to reduce its size. Finally, added the --force (-f) and --cleanup-interval (-c) options to the argument parsing, and improved the parsing of the --rate-limit (-r) option. NOTE: The verifier rejects program in it's current state as too large (over 1 million instructions). Setting the TCP_MAX_OPTIONS in pping_kern.c to 5 (or less) solves this. Unsure at the moment what causes the verifier to think the program is so large, as the code in pping_kern.c is identical to the one from the three files it was merged from. Signed-off-by: Simon Sundberg <simon.sundberg@kau.se>
59 lines
1.3 KiB
C
59 lines
1.3 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 INGRESS_PROG_SEC "xdp"
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#define EGRESS_PROG_SEC "classifier"
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struct bpf_config {
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__u64 rate_limit;
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};
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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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