Fix strict-aliasing warning with DTLS local port handling

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/dtls.c b/dtls.c
index 46413a4..2e5b48b 100644 (file)
--- a/dtls.c
+++ b/dtls.c
@@ -520,18 +520,21 @@ int connect_dtls_socket(struct openconnect_info *vpninfo)
        }
 
        if (vpninfo->dtls_local_port) {
-               struct sockaddr_storage dtls_bind_addr;
+               union {
+                       struct sockaddr_in in;
+                       struct sockaddr_in6 in6;
+               } dtls_bind_addr;
                int dtls_bind_addrlen;
                memset(&dtls_bind_addr, 0, sizeof(dtls_bind_addr));
 
                if (vpninfo->peer_addr->sa_family == AF_INET) {
-                       struct sockaddr_in *addr = (struct sockaddr_in *)&dtls_bind_addr;
+                       struct sockaddr_in *addr = &dtls_bind_addr.in;
                        dtls_bind_addrlen = sizeof(*addr);
                        addr->sin_family = AF_INET;
                        addr->sin_addr.s_addr = INADDR_ANY;
                        addr->sin_port = htons(vpninfo->dtls_local_port);
                } else if (vpninfo->peer_addr->sa_family == AF_INET6) {
-                       struct sockaddr_in6 *addr = (struct sockaddr_in6 *)&dtls_bind_addr;
+                       struct sockaddr_in6 *addr = &dtls_bind_addr.in6;
                        dtls_bind_addrlen = sizeof(*addr);
                        addr->sin6_family = AF_INET6;
                        addr->sin6_addr = in6addr_any;