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IPv6: allow complete in ipv6_addr_init_prefix

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If the specified prefix is a full IPv6 address, no bits remain.
Fixes a possible buffer overrun.
This commit is contained in:
Oleg Hahm 2014-11-08 20:06:03 +01:00
parent b96b995d76
commit 365bfd81af
1 changed files with 3 additions and 1 deletions
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4
sys/net/network_layer/sixlowpan/ip.c
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@ -658,7 +658,9 @@ void ipv6_addr_init_prefix(ipv6_addr_t *out, const ipv6_addr_t *prefix,
}
memcpy(out, prefix, bytes);
out->uint8[bytes] = prefix->uint8[bytes] & mask;
if (bytes < 16) {
out->uint8[bytes] = prefix->uint8[bytes] & mask;
}
memset(&(out[bytes + 1]), 0, 15 - bytes);
}