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r24967 | ghudson | 2011-06-13 14:54:33 -0400 (Mon, 13 Jun 2011) | 11 lines

ticket: 6920
subject: Fix old-style GSSRPC authentication
target_version: 1.9.2
tags: pullup

r24147 (ticket #6746) made libgssrpc ignorant of the remote address of
the kadmin socket, even when it's IPv4.  This made old-style GSSAPI
authentication fail because it uses the wrong channel bindings.  Fix
this problem by making clnttcp_create() get the remote address from
the socket using getpeername() if the caller doesn't provide it and
it's an IPv4 address.
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Index: src/lib/rpc/clnt_tcp.c
===================================================================
--- src/lib/rpc/clnt_tcp.c	(revision 24966)
+++ src/lib/rpc/clnt_tcp.c	(revision 24967)
@@ -187,9 +187,16 @@
 	ct->ct_sock = *sockp;
 	ct->ct_wait.tv_usec = 0;
 	ct->ct_waitset = FALSE;
-	if (raddr == NULL)
-	    memset(&ct->ct_addr, 0, sizeof(ct->ct_addr));
-	else
+	if (raddr == NULL) {
+	    /* Get the remote address from the socket, if it's IPv4. */
+	    struct sockaddr_in sin;
+	    socklen_t len = sizeof(sin);
+	    int ret = getpeername(ct->ct_sock, (struct sockaddr *)&sin, &len);
+	    if (ret == 0 && len == sizeof(sin) && sin.sin_family == AF_INET)
+		ct->ct_addr = sin;
+	    else
+		memset(&ct->ct_addr, 0, sizeof(ct->ct_addr));
+	} else
 	    ct->ct_addr = *raddr;
 
 	/*