From 01b1a8afd0f9dc565db2a74e83461c6705bd4373 Mon Sep 17 00:00:00 2001
From: melifaro <melifaro@FreeBSD.org>
Date: Tue, 20 Dec 2011 11:13:44 +0000
Subject: [PATCH] Add binding support to libradius(3).

Submitted by:    Sergey Matveychuk <sem33@yandex-team.ru>
Approved by:     ae (mentor)
MFC after:       2 weeks
---
 lib/libradius/Makefile         | 1 +
 lib/libradius/libradius.3      | 6 ++++++
 lib/libradius/radlib.c         | 9 ++++++++-
 lib/libradius/radlib.h         | 1 +
 lib/libradius/radlib_private.h | 1 +
 5 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/lib/libradius/Makefile b/lib/libradius/Makefile
index 5723bf1ba6f0..d71d8f2022ed 100644
--- a/lib/libradius/Makefile
+++ b/lib/libradius/Makefile
@@ -36,6 +36,7 @@ MAN=		libradius.3 radius.conf.5
 MLINKS+=libradius.3 rad_acct_open.3 \
 	libradius.3 rad_add_server.3 \
 	libradius.3 rad_auth_open.3 \
+	libradius.3 rad_bind_to.3 \
 	libradius.3 rad_close.3 \
 	libradius.3 rad_config.3 \
 	libradius.3 rad_continue_send_request.3 \
diff --git a/lib/libradius/libradius.3 b/lib/libradius/libradius.3
index 7fc11625f118..dca38ca009ee 100644
--- a/lib/libradius/libradius.3
+++ b/lib/libradius/libradius.3
@@ -91,6 +91,8 @@
 .Fn rad_server_open "int fd"
 .Ft "const char *"
 .Fn rad_server_secret "struct rad_handle *h"
+.Ft "void"
+.Fn rad_bind_to "struct rad_handle *h" "in_addr_t addr"
 .Ft u_char *
 .Fn rad_demangle "struct rad_handle *h" "const void *mangled" "size_t mlen"
 .Ft u_char *
@@ -431,6 +433,10 @@ returns the secret shared with the current RADIUS server according to the
 supplied rad_handle.
 .Pp
 The
+.Fn rad_bind_to
+assigns a source address for all requests to the current RADIUS server.
+.Pp
+The
 .Fn rad_demangle
 function demangles attributes containing passwords and MS-CHAPv1 MPPE-Keys.
 The return value is
diff --git a/lib/libradius/radlib.c b/lib/libradius/radlib.c
index e4e4a9411800..46a9b58c9e2f 100644
--- a/lib/libradius/radlib.c
+++ b/lib/libradius/radlib.c
@@ -756,9 +756,16 @@ rad_create_request(struct rad_handle *h, int code)
 	clear_password(h);
 	h->authentic_pos = 0;
 	h->out_created = 1;
+	h->bindto = INADDR_ANY;
 	return 0;
 }
 
+void
+rad_bind_to(struct rad_handle *h, in_addr_t addr)
+{
+    h->bindto = addr;
+}
+
 int
 rad_create_response(struct rad_handle *h, int code)
 {
@@ -857,7 +864,7 @@ rad_init_send_request(struct rad_handle *h, int *fd, struct timeval *tv)
 		memset(&sin, 0, sizeof sin);
 		sin.sin_len = sizeof sin;
 		sin.sin_family = AF_INET;
-		sin.sin_addr.s_addr = INADDR_ANY;
+		sin.sin_addr.s_addr = h->bindto;
 		sin.sin_port = htons(0);
 		if (bind(h->fd, (const struct sockaddr *)&sin,
 		    sizeof sin) == -1) {
diff --git a/lib/libradius/radlib.h b/lib/libradius/radlib.h
index b26be41d66ef..f9e451b465d9 100644
--- a/lib/libradius/radlib.h
+++ b/lib/libradius/radlib.h
@@ -195,6 +195,7 @@ struct rad_handle	*rad_acct_open(void);
 int			 rad_add_server(struct rad_handle *,
 			    const char *, int, const char *, int, int);
 struct rad_handle	*rad_auth_open(void);
+void			 rad_bind_to(struct rad_handle *, in_addr_t);
 void			 rad_close(struct rad_handle *);
 int			 rad_config(struct rad_handle *, const char *);
 int			 rad_continue_send_request(struct rad_handle *, int,
diff --git a/lib/libradius/radlib_private.h b/lib/libradius/radlib_private.h
index d886c740b3fd..a76e594aa613 100644
--- a/lib/libradius/radlib_private.h
+++ b/lib/libradius/radlib_private.h
@@ -92,6 +92,7 @@ struct rad_handle {
 	int		 try;		/* How many requests we've sent */
 	int		 srv;		/* Server number we did last */
 	int		 type;		/* Handle type */
+	in_addr_t	 bindto;	/* Bind to address */
 };
 
 struct vendor_attribute {