Report the right address in connection setup errors.

[PuTTY.git] / windows / winnet.c

diff --git a/windows/winnet.c b/windows/winnet.c
index 72360639e7c49cd770349a1d6388b3eb311c61d0..b4ac166cd2d99710a2c655c1a98619d8e5e0b11c 100644 (file)
--- a/windows/winnet.c
+++ b/windows/winnet.c
@@ -704,6 +704,35 @@ void sk_getaddr(SockAddr addr, char *buf, int buflen)
     }
 }
 
+/*
+ * This constructs a SockAddr that points at one specific sub-address
+ * of a parent SockAddr. The returned SockAddr does not own all its
+ * own memory: it points into the old one's data structures, so it
+ * MUST NOT be used after the old one is freed, and it MUST NOT be
+ * passed to sk_addr_free. (The latter is why it's returned by value
+ * rather than dynamically allocated - that should clue in anyone
+ * writing a call to it that something is weird about it.)
+ */
+static struct SockAddr_tag sk_extractaddr_tmp(
+    SockAddr addr, const SockAddrStep *step)
+{
+    struct SockAddr_tag toret;
+    toret = *addr;                    /* structure copy */
+    toret.refcount = 1;
+
+#ifndef NO_IPV6
+    toret.ais = step->ai;
+#endif
+    if (SOCKADDR_FAMILY(addr, *step) == AF_INET
+#ifndef NO_IPV6
+        && !toret.ais
+#endif
+        )
+        toret.addresses += step->curraddr;
+
+    return toret;
+}
+
 int sk_addr_needs_port(SockAddr addr)
 {
     return addr->namedpipe ? FALSE : TRUE;
@@ -947,7 +976,11 @@ static DWORD try_connect(Actual_Socket sock)
         p_closesocket(sock->s);
     }
 
-    plug_log(sock->plug, 0, sock->addr, sock->port, NULL, 0);
+    {
+        struct SockAddr_tag thisaddr = sk_extractaddr_tmp(
+            sock->addr, &sock->step);
+        plug_log(sock->plug, 0, &thisaddr, sock->port, NULL, 0);
+    }
 
     /*
      * Open socket.
@@ -1114,8 +1147,11 @@ static DWORD try_connect(Actual_Socket sock)
      */
     add234(sktree, sock);
 
-    if (err)
-       plug_log(sock->plug, 1, sock->addr, sock->port, sock->error, err);
+    if (err) {
+        struct SockAddr_tag thisaddr = sk_extractaddr_tmp(
+            sock->addr, &sock->step);
+       plug_log(sock->plug, 1, &thisaddr, sock->port, sock->error, err);
+    }
     return err;
 }
 
@@ -1578,7 +1614,9 @@ int select_result(WPARAM wParam, LPARAM lParam)
         * plug.
         */
        if (s->addr) {
-           plug_log(s->plug, 1, s->addr, s->port,
+            struct SockAddr_tag thisaddr = sk_extractaddr_tmp(
+                s->addr, &s->step);
+           plug_log(s->plug, 1, &thisaddr, s->port,
                     winsock_error_string(err), err);
            while (err && s->addr && sk_nextaddr(s->addr, &s->step)) {
                err = try_connect(s);