diff options
| author | Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> | 2024-11-20 08:43:19 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-12-02 08:41:16 -0800 |
| commit | f4504af68575c1675235bacd8d36157cfc27ae5e (patch) | |
| tree | c5522908af89363ad8c39b76e977740d75f2354e /tools/testing/selftests/bpf/prog_tests | |
| parent | c24010821a89954a93b39354c42596d315518c9b (diff) | |
selftests/bpf: move ip checksum helper to network helpers
xdp_metadata test has a small helper computing ipv4 checksums to allow
manually building packets.
Move this helper to network_helpers to share it with other tests.
Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://lore.kernel.org/r/20241120-flow_dissector-v3-9-45b46494f937@bootlin.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/xdp_metadata.c | 19 |
1 files changed, 1 insertions, 18 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c index c87ee2bf558c..7f8e16165533 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c @@ -133,23 +133,6 @@ static void close_xsk(struct xsk *xsk) munmap(xsk->umem_area, UMEM_SIZE); } -static void ip_csum(struct iphdr *iph) -{ - __u32 sum = 0; - __u16 *p; - int i; - - iph->check = 0; - p = (void *)iph; - for (i = 0; i < sizeof(*iph) / sizeof(*p); i++) - sum += p[i]; - - while (sum >> 16) - sum = (sum & 0xffff) + (sum >> 16); - - iph->check = ~sum; -} - static int generate_packet(struct xsk *xsk, __u16 dst_port) { struct xsk_tx_metadata *meta; @@ -192,7 +175,7 @@ static int generate_packet(struct xsk *xsk, __u16 dst_port) iph->protocol = IPPROTO_UDP; ASSERT_EQ(inet_pton(FAMILY, TX_ADDR, &iph->saddr), 1, "inet_pton(TX_ADDR)"); ASSERT_EQ(inet_pton(FAMILY, RX_ADDR, &iph->daddr), 1, "inet_pton(RX_ADDR)"); - ip_csum(iph); + iph->check = build_ip_csum(iph); udph->source = htons(UDP_SOURCE_PORT); udph->dest = htons(dst_port); |