From: Andrew Zaborowski <andrew.zaborowski at intel.com>
To: ell at lists.01.org
Subject: [PATCH 01/13] net: Add l_net_clear_host_bits utility
Date: Fri, 06 May 2022 01:15:27 +0200 [thread overview]
Message-ID: <20220505231539.888792-1-andrew.zaborowski@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 853 bytes --]
Add function that zeros bits after prefix_len'th bit in an address. Put
it in net.h so it can be use by both netconfig.c and icmp6.c,
potentially others.
---
ell/net.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/ell/net.h b/ell/net.h
index 0521d75..e193eef 100644
--- a/ell/net.h
+++ b/ell/net.h
@@ -61,6 +61,19 @@ static inline bool l_net_prefix_matches(const void *a, const void *b,
return !bits || ((left ^ right) & (0xff00u >> bits)) == 0;
}
+static inline void l_net_clear_host_bits(uint8_t *address, uint8_t prefix_len,
+ uint8_t bytes)
+{
+ uint8_t last_byte = prefix_len / 8;
+
+ if (prefix_len & 7) {
+ address[last_byte] &= 0xff00 >> (prefix_len & 7);
+ last_byte++;
+ }
+
+ memset(address + last_byte, 0, bytes - last_byte);
+}
+
#ifdef __cplusplus
}
#endif
--
2.32.0
next reply other threads:[~2022-05-05 23:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-05 23:15 Andrew Zaborowski [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-05-12 16:02 [PATCH 01/13] net: Add l_net_clear_host_bits utility Denis Kenzior
2022-05-13 12:26 Andrew Zaborowski
2022-05-13 14:15 Denis Kenzior
2022-05-13 22:41 Andrew Zaborowski
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