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| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2018-05-10 18:40:38 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-05-10 19:23:02 +0200 |
| commit | c454c26304c197e342e33649bd4a759580c628d9 (patch) | |
| tree | 84c83ed7c4810faa14e372ba19f768e0b676d736 | |
| parent | allowedips: produce better assembly with unsigned arithmetic (diff) | |
| download | wireguard-monolithic-historical-c454c26304c197e342e33649bd4a759580c628d9.tar.xz wireguard-monolithic-historical-c454c26304c197e342e33649bd4a759580c628d9.zip | |
allowedips: simplify arithmetic
Suggested-by: Samuel Neves <sneves@dei.uc.pt>
| -rw-r--r-- | src/allowedips.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/allowedips.c b/src/allowedips.c index 4b2f6c7..293bb75 100644 --- a/src/allowedips.c +++ b/src/allowedips.c @@ -81,7 +81,7 @@ static int walk_by_peer(struct allowedips_node __rcu *top, u8 bits, struct allow swap_endian(ip, node->bits, bits); memset(ip + (node->cidr + 7U) / 8U, 0, (bits / 8U) - ((node->cidr + 7U) / 8U)); if (node->cidr) - ip[(node->cidr + 7U) / 8U - 1U] &= ~0U << ((8U - (node->cidr % 8U)) % 8U); + ip[(node->cidr + 7U) / 8U - 1U] &= ~0U << (-node->cidr % 8U); ret = func(ctx, ip, node->cidr, bits == 32 ? AF_INET : AF_INET6); if (ret) |