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Define and use memcpy() in XDP program itself for optimization.

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This commit is contained in:
gamemann
2022-09-08 04:03:08 +00:00
parent 96d8a7079f
commit 93a9fc96ff
1 changed files with 5 additions and 4 deletions
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9
src/xdpfw_kern.c
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@@ -24,6 +24,10 @@
}) })
#endif #endif
#ifndef memcpy
#define memcpy(dest, src, n) __builtin_memcpy((dest), (src), (n))
#endif
struct bpf_map_def SEC("maps") filters_map = struct bpf_map_def SEC("maps") filters_map =
{ {
.type = BPF_MAP_TYPE_ARRAY, .type = BPF_MAP_TYPE_ARRAY,
@@ -112,10 +116,7 @@ int xdp_prog_main(struct xdp_md *ctx)
return XDP_DROP; return XDP_DROP;
} }
srcip6 |= (__u128) iph6->saddr.in6_u.u6_addr32[0] << 0; memcpy(&srcip6, &iph6->saddr.in6_u.u6_addr32, sizeof(srcip6));
srcip6 |= (__u128) iph6->saddr.in6_u.u6_addr32[1] << 32;
srcip6 |= (__u128) iph6->saddr.in6_u.u6_addr32[2] << 64;
srcip6 |= (__u128) iph6->saddr.in6_u.u6_addr32[3] << 96;
} }
else else
{ {