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rtnl-addr: Inherit prefix length to nl_addr objs in rtnl_addr_set_prefixlen()

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Previously if using rtnl_addr_set_prefixlen() the new prefix length
was not forwarded to the corresponding 'struct nl_addr' objects
associated with address already and thus the comparison function
would fail.

This patch also clears the internal ADDR_ATTR_PREFIXLEN flag if
the prefix length has been reset.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
This commit is contained in:
Thomas Graf 2013-03-14 18:52:17 +01:00
parent e09e7f1035
commit 549d26dc87
1 changed files with 32 additions and 3 deletions
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35
lib/route/addr.c
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@ -814,10 +814,39 @@ int rtnl_addr_get_family(struct rtnl_addr *addr)
return addr->a_family;
}
void rtnl_addr_set_prefixlen(struct rtnl_addr *addr, int prefix)
/**
* Set the prefix length / netmask
* @arg addr Address
* @arg prefixlen Length of prefix (netmask)
*
* Modifies the length of the prefix. If the address object contains a peer
* address the prefix length will apply to it, otherwise the prefix length
* will apply to the local address of the address.
*
* If the address object contains a peer or local address the corresponding
* `struct nl_addr` will be updated with the new prefix length.
*
* @note Specifying a length of 0 will remove the prefix length alltogether.
*
* @see rtnl_addr_get_prefixlen()
*/
void rtnl_addr_set_prefixlen(struct rtnl_addr *addr, int prefixlen)
{
addr->a_prefixlen = prefix;
addr->ce_mask |= ADDR_ATTR_PREFIXLEN;
addr->a_prefixlen = prefixlen;
if (prefixlen)
addr->ce_mask |= ADDR_ATTR_PREFIXLEN;
else
addr->ce_mask &= ~ADDR_ATTR_PREFIXLEN;
/*
* The prefix length always applies to the peer address if
* a peer address is present.
*/
if (addr->a_peer)
nl_addr_set_prefixlen(addr->a_peer, prefixlen);
else if (addr->a_local)
nl_addr_set_prefixlen(addr->a_local, prefixlen);
}
int rtnl_addr_get_prefixlen(struct rtnl_addr *addr)