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https://github.com/xdp-project/bpf-examples.git
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1cadbe0ae7
Add command-line flags for each protocol that pping should attempt to parse and report RTTs for (currently -T/--tcp and -C/--icmp). If no protocol is specified assume TCP. To clarify this, output a message before start on how ePPing has been configured (stating output format, tracked protocols and which interface to run on). Additionally, as the ppviz format was only designed for TCP it does not have any field for which protocol an entry belongs to. Therefore, emit a warning in case the user selects the ppviz format with anything other than TCP. Signed-off-by: Simon Sundberg <simon.sundberg@kau.se>
133 lines
3.1 KiB
C
133 lines
3.1 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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#include <stdbool.h>
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/* For the event_type members of rtt_event and flow_event */
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#define EVENT_TYPE_FLOW 1
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#define EVENT_TYPE_RTT 2
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enum __attribute__((__packed__)) flow_event_type {
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FLOW_EVENT_NONE,
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FLOW_EVENT_OPENING,
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FLOW_EVENT_CLOSING
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};
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enum __attribute__((__packed__)) flow_event_reason {
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EVENT_REASON_SYN,
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EVENT_REASON_SYN_ACK,
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EVENT_REASON_FIRST_OBS_PCKT,
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EVENT_REASON_FIN,
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EVENT_REASON_FIN_ACK,
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EVENT_REASON_RST,
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EVENT_REASON_FLOW_TIMEOUT
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};
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enum __attribute__((__packed__)) flow_event_source {
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EVENT_SOURCE_EGRESS,
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EVENT_SOURCE_INGRESS,
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EVENT_SOURCE_USERSPACE
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};
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struct bpf_config {
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__u64 rate_limit;
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bool track_tcp;
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bool track_icmp;
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__u8 reserved[6];
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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 min_rtt;
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__u64 last_timestamp;
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__u64 sent_pkts;
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__u64 sent_bytes;
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__u64 rec_pkts;
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__u64 rec_bytes;
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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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/*
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* An RTT event message that can be passed from the bpf-programs to user-space.
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* The initial event_type memeber is used to allow multiplexing between
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* different event types in a single perf buffer. Memebers up to and including
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* flow are identical to other event types.
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* Uses explicit padding instead of packing based on recommendations in cilium's
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* BPF reference documentation at https://docs.cilium.io/en/stable/bpf/#llvm.
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*/
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struct rtt_event {
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__u64 event_type;
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__u64 timestamp;
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struct network_tuple flow;
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__u32 padding;
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__u64 rtt;
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__u64 min_rtt;
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__u64 sent_pkts;
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__u64 sent_bytes;
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__u64 rec_pkts;
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__u64 rec_bytes;
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__u32 reserved;
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};
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struct flow_event_info {
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enum flow_event_type event;
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enum flow_event_reason reason;
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};
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/*
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* A flow event message that can be passed from the bpf-programs to user-space.
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* The initial event_type memeber is used to allow multiplexing between
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* different event types in a single perf buffer. Memebers up to and including
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* flow are identical to other event types.
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*/
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struct flow_event {
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__u64 event_type;
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__u64 timestamp;
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struct network_tuple flow;
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struct flow_event_info event_info;
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enum flow_event_source source;
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__u8 reserved;
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};
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union pping_event {
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__u64 event_type;
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struct rtt_event rtt_event;
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struct flow_event flow_event;
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};
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#endif
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