slirp: add in6_dhcp_multicast()

Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: NSamuel Thibault <samuel.thibault@ens-lyon.org>

slirp/dhcpv6.h

@@ -17,6 +17,9 @@
                             0x00, 0x00, 0x00, 0x00,\
                             0x00, 0x01, 0x00, 0x02 } }
 
+#define in6_dhcp_multicast(a)\
+    in6_equal(a, &(struct in6_addr)ALLDHCP_MULTICAST)
+
 void dhcpv6_input(struct sockaddr_in6 *srcsas, struct mbuf *m);
 
 #endif

slirp/udp6.c

@@ -65,7 +65,7 @@ void udp6_input(struct mbuf *m)
     /* handle DHCPv6 */
     if (ntohs(uh->uh_dport) == DHCPV6_SERVER_PORT &&
         (in6_equal(&ip->ip_dst, &slirp->vhost_addr6) ||
-         in6_equal(&ip->ip_dst, &(struct in6_addr)ALLDHCP_MULTICAST))) {
+         in6_dhcp_multicast(&ip->ip_dst))) {
         m->m_data += iphlen;
         m->m_len -= iphlen;
         dhcpv6_input(&lhost, m);