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pping: Load tc-bpf program with libbpf

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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>
This commit is contained in:
Simon Sundberg
2021-03-02 17:40:51 +01:00
parent 1282bce7d8
commit 1446e6edec
9 changed files with 133 additions and 163 deletions
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9
pping/pping_helpers.h
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@@ -32,6 +32,15 @@ struct parsing_context {
__u32 pkt_len; //Full packet length (headers+data)
};
// Timestamp map
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__type(key, struct packet_id);
__type(value, __u64);
__uint(max_entries, 16384);
__uint(pinning, LIBBPF_PIN_BY_NAME);
} ts_start SEC(".maps");
/*
* Maps an IPv4 address into an IPv6 address according to RFC 4291 sec 2.5.5.2
*/