netlink: add a basic rtnetlink parser of tc messages

* rtnl_tc.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* netlink_route.h (decode_tcmsg): New prototype.
* netlink_route.c (route_decoders): Add RTM_DELQDISC,
RTM_GETQDISC, RTM_NEWQDISC, RTM_DELTCLASS, RTM_GETTCLASS,
RTM_NEWTCLASS, RTM_DELTFILTER, RTM_GETTFILTER, and RTM_NEWTFILTER.

Co-authored-by: Fabien Siron <fabien.siron@epita.fr>

diff --git a/Makefile.am b/Makefile.am
index 89f1f0d48cecccb84e11ed1b8683c7288825996f..2585b7de7a30b5f54a4337ddd8ca13a0f3f5fb28 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -253,6 +253,7 @@ strace_SOURCES =    \
        rtnl_neightbl.c \
        rtnl_route.c    \
        rtnl_rule.c     \
+       rtnl_tc.c       \
        sched.c         \
        sched_attr.h    \
        scsi.c          \

diff --git a/netlink_route.c b/netlink_route.c
index 13b6c29c5f77eec6238d0393b31f8bceb53066a7..5448b59f303d8cd0269db48c424df00203f91339 100644 (file)
--- a/netlink_route.c
+++ b/netlink_route.c
@@ -77,7 +77,17 @@ static const netlink_route_decoder_t route_decoders[] = {
 
        [RTM_GETNEIGHTBL - RTM_BASE] = decode_ndtmsg,
        [RTM_NEWNEIGHTBL - RTM_BASE] = decode_ndtmsg,
-       [RTM_SETNEIGHTBL - RTM_BASE] = decode_ndtmsg
+       [RTM_SETNEIGHTBL - RTM_BASE] = decode_ndtmsg,
+
+       [RTM_DELQDISC - RTM_BASE] = decode_tcmsg,
+       [RTM_GETQDISC - RTM_BASE] = decode_tcmsg,
+       [RTM_NEWQDISC - RTM_BASE] = decode_tcmsg,
+       [RTM_DELTCLASS - RTM_BASE] = decode_tcmsg,
+       [RTM_GETTCLASS - RTM_BASE] = decode_tcmsg,
+       [RTM_NEWTCLASS - RTM_BASE] = decode_tcmsg,
+       [RTM_DELTFILTER - RTM_BASE] = decode_tcmsg,
+       [RTM_GETTFILTER - RTM_BASE] = decode_tcmsg,
+       [RTM_NEWTFILTER - RTM_BASE] = decode_tcmsg
 };
 
 bool

diff --git a/netlink_route.h b/netlink_route.h
index 32972c24f899df6e96873198c2f1de61760af6ed..4a508471aa2363ca8c177f2f61669eb163777fb0 100644 (file)
--- a/netlink_route.h
+++ b/netlink_route.h
@@ -46,5 +46,6 @@ extern DECL_NETLINK_ROUTE_DECODER(decode_ndmsg);
 extern DECL_NETLINK_ROUTE_DECODER(decode_ndtmsg);
 extern DECL_NETLINK_ROUTE_DECODER(decode_rtm_getneigh);
 extern DECL_NETLINK_ROUTE_DECODER(decode_rtmsg);
+extern DECL_NETLINK_ROUTE_DECODER(decode_tcmsg);
 
 #endif /* !STRACE_NETLINK_ROUTE_H */

diff --git a/rtnl_tc.c b/rtnl_tc.c
new file mode 100644 (file)
index 0000000..db06e55
--- /dev/null
+++ b/rtnl_tc.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
+ * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
+ * Copyright (c) 2016-2017 The strace developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "defs.h"
+#include "netlink_route.h"
+#include "print_fields.h"
+
+#include "netlink.h"
+#include <linux/rtnetlink.h>
+
+DECL_NETLINK_ROUTE_DECODER(decode_tcmsg)
+{
+       struct tcmsg tcmsg = { .tcm_family = family };
+       const size_t offset = sizeof(tcmsg.tcm_family);
+
+       PRINT_FIELD_XVAL("{", tcmsg, tcm_family, addrfams, "AF_???");
+
+       tprints(", ");
+       if (len >= sizeof(tcmsg)) {
+               if (!umoven_or_printaddr(tcp, addr + offset,
+                                        sizeof(tcmsg) - offset,
+                                        (void *) &tcmsg + offset)) {
+                       PRINT_FIELD_IFINDEX("", tcmsg, tcm_ifindex);
+                       PRINT_FIELD_U(", ", tcmsg, tcm_handle);
+                       PRINT_FIELD_U(", ", tcmsg, tcm_parent);
+                       PRINT_FIELD_U(", ", tcmsg, tcm_info);
+               }
+       } else
+               tprints("...");
+       tprints("}");
+}