X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/635d063da010c2a98ba36c017d47baff92139eac..6e67448b9a59f0a50f4fb784da3faf04d63f4994:/windows/winnet.c

diff --git a/windows/winnet.c b/windows/winnet.c
index 1ddfa5c7..715c492f 100644
--- a/windows/winnet.c
+++ b/windows/winnet.c
@@ -353,6 +353,9 @@ SockAddr sk_namelookup(const char *host, char **canonicalname,
 		   address_family == ADDRTYPE_IPV6 ? AF_INET6 :
 #endif
 		   AF_UNSPEC);
+#ifndef NO_IPV6
+    ret->ai = ret->ais = NULL;
+#endif
     ret_family = AF_UNSPEC;
     *realhost = '\0';
 
@@ -365,6 +368,7 @@ SockAddr sk_namelookup(const char *host, char **canonicalname,
 	    struct addrinfo hints;
 	    memset(&hints, 0, sizeof(hints));
 	    hints.ai_family = ret->family;
+	    hints.ai_flags = AI_CANONNAME;
 	    if ((err = p_getaddrinfo(host, NULL, &hints, &ret->ais)) == 0)
 		ret_family = ret->ais->ai_family;
 	    ret->ai = ret->ais;
@@ -403,17 +407,10 @@ SockAddr sk_namelookup(const char *host, char **canonicalname,
 			   (char *) &((SOCKADDR_IN *) ret->ai->
 				      ai_addr)->sin_addr, sizeof(a));
 
-		/* Now let's find that canonicalname... */
-		if (p_getnameinfo) {
-		    if (p_getnameinfo
-			((struct sockaddr *) ret->ai->ai_addr,
-			 ret->family ==
-			 AF_INET ? sizeof(SOCKADDR_IN) :
-			 sizeof(SOCKADDR_IN6), realhost,
-			 sizeof(realhost), NULL, 0, 0) != 0) {
-			strncpy(realhost, host, sizeof(realhost));
-		    }
-		}
+		if (ret->ai->ai_canonname)
+		    strncpy(realhost, ret->ai->ai_canonname, lenof(realhost));
+		else
+		    strncpy(realhost, host, lenof(realhost));
 	    }
 	    /* We used the IPv4-only gethostbyname()... */
 	    else
@@ -456,6 +453,10 @@ SockAddr sk_nonamelookup(const char *host)
     SockAddr ret = snew(struct SockAddr_tag);
     ret->error = NULL;
     ret->family = AF_UNSPEC;
+#ifndef NO_IPV6
+    ret->ai = ret->ais = NULL;
+#endif
+    ret->naddresses = 0;
     strncpy(ret->hostname, host, lenof(ret->hostname));
     ret->hostname[lenof(ret->hostname)-1] = '\0';
     return ret;
@@ -565,10 +566,18 @@ int sk_address_is_local(SockAddr addr)
     } else
 #endif
     if (addr->family == AF_INET) {
-	struct in_addr a;
-	assert(addr->addresses && addr->curraddr < addr->naddresses);
-	a.s_addr = p_htonl(addr->addresses[addr->curraddr]);
-	return ipv4_is_local_addr(a);
+#ifndef NO_IPV6
+	if (addr->ai) {
+	    return ipv4_is_local_addr(((struct sockaddr_in *)addr->ai->ai_addr)
+				      ->sin_addr);
+	} else
+#endif
+	{
+	    struct in_addr a;
+	    assert(addr->addresses && addr->curraddr < addr->naddresses);
+	    a.s_addr = p_htonl(addr->addresses[addr->curraddr]);
+	    return ipv4_is_local_addr(a);
+	}
     } else {
 	assert(addr->family == AF_UNSPEC);
 	return 0;		       /* we don't know; assume not */
@@ -1509,9 +1518,12 @@ static void sk_tcp_set_frozen(Socket sock, int is_frozen)
     if (s->frozen == is_frozen)
 	return;
     s->frozen = is_frozen;
-    if (!is_frozen && s->frozen_readable) {
-	char c;
-	p_recv(s->s, &c, 1, MSG_PEEK);
+    if (!is_frozen) {
+	do_select(s->s, 1);
+	if (s->frozen_readable) {
+	    char c;
+	    p_recv(s->s, &c, 1, MSG_PEEK);
+	}
     }
     s->frozen_readable = 0;
 }