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<base href="https://bugs.dpdk.org/">
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<body><table border="1" cellspacing="0" cellpadding="8" class="bz_new_table">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - rte_ipv6_addr_is_v4mapped wrong logic"
href="https://bugs.dpdk.org/show_bug.cgi?id=1664">1664</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>rte_ipv6_addr_is_v4mapped wrong logic
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>ethdev
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sunnylandh@gmail.com
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">rte_ipv6_addr_is_v4mapped() is implemented by comparing the first 32 bits of an
IPv6 address with the ::ffff:0.0.0.0/96 prefix.
<a href="https://git.dpdk.org/dpdk/tree/lib/net/rte_ip6.h?id=fba9875559906e04eaeb74532f4cfd51194259a2#n313">https://git.dpdk.org/dpdk/tree/lib/net/rte_ip6.h?id=fba9875559906e04eaeb74532f4cfd51194259a2#n313</a>
The following snippet prints "1", but the loopback address is not a v4mapped
address.
#include <stdio.h>
#include <rte_ip6.h>
int main() {
struct rte_ipv6_addr a = RTE_IPV6_ADDR_LOOPBACK;
printf("%d\n", rte_ipv6_addr_is_v4mapped(&a));
}
The function should compare the first 96 bits instead.
rte_ipv6_addr_is_v4compat() has the same mistake.
</pre>
</div>
</p>
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