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mdns: Fix multicast destination check for IPv6
This broke when IPv6 got scopes added. Scopes/zones are checked even if none of the compared addresses are link local. Result of the bug was that IPv6 replies were always sent unicast to the source instead of to the multicast address. Add ip-generic version that ignores IP zone info, since the v6 group address is not tied to any netif.
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@ -1814,7 +1814,7 @@ mdns_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr,
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#if LWIP_IPV6
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#if LWIP_IPV6
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if (IP_IS_V6(ip_current_dest_addr())) {
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if (IP_IS_V6(ip_current_dest_addr())) {
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if (!ip_addr_cmp(ip_current_dest_addr(), &v6group)) {
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if (!ip_addr_cmp_zoneless(ip_current_dest_addr(), &v6group)) {
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packet.recv_unicast = 1;
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packet.recv_unicast = 1;
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}
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}
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}
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}
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@ -201,6 +201,10 @@ extern const ip_addr_t ip_addr_any_type;
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ip6_addr_cmp(ip_2_ip6(addr1), ip_2_ip6(addr2)) : \
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ip6_addr_cmp(ip_2_ip6(addr1), ip_2_ip6(addr2)) : \
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ip4_addr_cmp(ip_2_ip4(addr1), ip_2_ip4(addr2))))
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ip4_addr_cmp(ip_2_ip4(addr1), ip_2_ip4(addr2))))
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/** @ingroup ipaddr */
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/** @ingroup ipaddr */
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#define ip_addr_cmp_zoneless(addr1, addr2) ((IP_GET_TYPE(addr1) != IP_GET_TYPE(addr2)) ? 0 : (IP_IS_V6_VAL(*(addr1)) ? \
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ip6_addr_cmp_zoneless(ip_2_ip6(addr1), ip_2_ip6(addr2)) : \
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ip4_addr_cmp(ip_2_ip4(addr1), ip_2_ip4(addr2))))
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/** @ingroup ipaddr */
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#define ip_addr_isany(ipaddr) (((ipaddr) == NULL) ? 1 : ((IP_IS_V6(ipaddr)) ? \
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#define ip_addr_isany(ipaddr) (((ipaddr) == NULL) ? 1 : ((IP_IS_V6(ipaddr)) ? \
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ip6_addr_isany(ip_2_ip6(ipaddr)) : \
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ip6_addr_isany(ip_2_ip6(ipaddr)) : \
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ip4_addr_isany(ip_2_ip4(ipaddr))))
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ip4_addr_isany(ip_2_ip4(ipaddr))))
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