[PATCH v2 03/25] netlink: add a basic rtnetlink parser of route messages
JingPiao Chen
chenjingpiao at gmail.com
Sun Aug 13 02:22:21 UTC 2017
* defs.h (routing_scopes): New xlat prototype.
* netlink_route.c: New file.
* Makefile.am (strace_SOURCES): Add it
* netlink_route.h (decode_rtmsg): New prototype.
* netlink_route.c (route_decoders): Add RTM_DELROUTE,
RTM_GETROUTE, and RTM_NEWROUTE.
* xlat/ip_type_of_services.in: New file.
* xlat/routing_flags.in: Likewise.
* xlat/routing_protocols.in: Likewise.
* xlat/routing_table_ids.in: Likewise.
* xlat/routing_types.in: Likewise.
Co-authored-by: Fabien Siron <fabien.siron at epita.fr>
---
Makefile.am | 1 +
defs.h | 1 +
netlink_route.c | 6 +++-
netlink_route.h | 1 +
rtnl_route.c | 74 +++++++++++++++++++++++++++++++++++++++++++++
xlat/ip_type_of_services.in | 4 +++
xlat/routing_flags.in | 5 +++
xlat/routing_protocols.in | 16 ++++++++++
xlat/routing_table_ids.in | 5 +++
xlat/routing_types.in | 12 ++++++++
10 files changed, 124 insertions(+), 1 deletion(-)
create mode 100644 rtnl_route.c
create mode 100644 xlat/ip_type_of_services.in
create mode 100644 xlat/routing_flags.in
create mode 100644 xlat/routing_protocols.in
create mode 100644 xlat/routing_table_ids.in
create mode 100644 xlat/routing_types.in
diff --git a/Makefile.am b/Makefile.am
index ff11a91..cea4d94 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -249,6 +249,7 @@ strace_SOURCES = \
rtc.c \
rtnl_addr.c \
rtnl_link.c \
+ rtnl_route.c \
sched.c \
sched_attr.h \
scsi.c \
diff --git a/defs.h b/defs.h
index 2efbfa3..8ce28c4 100644
--- a/defs.h
+++ b/defs.h
@@ -298,6 +298,7 @@ extern const struct xlat nl_route_types[];
extern const struct xlat open_access_modes[];
extern const struct xlat open_mode_flags[];
extern const struct xlat resource_flags[];
+extern const struct xlat routing_scopes[];
extern const struct xlat setns_types[];
extern const struct xlat sg_io_info[];
extern const struct xlat socketlayers[];
diff --git a/netlink_route.c b/netlink_route.c
index 5e3ed24..e32d832 100644
--- a/netlink_route.c
+++ b/netlink_route.c
@@ -61,7 +61,11 @@ static const netlink_route_decoder_t route_decoders[] = {
[RTM_GETADDR - RTM_BASE] = decode_ifaddrmsg,
[RTM_GETANYCAST - RTM_BASE] = decode_ifaddrmsg,
[RTM_GETMULTICAST - RTM_BASE] = decode_ifaddrmsg,
- [RTM_NEWADDR - RTM_BASE] = decode_ifaddrmsg
+ [RTM_NEWADDR - RTM_BASE] = decode_ifaddrmsg,
+
+ [RTM_DELROUTE - RTM_BASE] = decode_rtmsg,
+ [RTM_GETROUTE - RTM_BASE] = decode_rtmsg,
+ [RTM_NEWROUTE - RTM_BASE] = decode_rtmsg
};
bool
diff --git a/netlink_route.h b/netlink_route.h
index f644d61..02d3789 100644
--- a/netlink_route.h
+++ b/netlink_route.h
@@ -41,5 +41,6 @@ route_decode_name(struct tcb *tcp, \
extern DECL_NETLINK_ROUTE_DECODER(decode_ifaddrmsg);
extern DECL_NETLINK_ROUTE_DECODER(decode_ifinfomsg);
+extern DECL_NETLINK_ROUTE_DECODER(decode_rtmsg);
#endif /* !STRACE_NETLINK_ROUTE_H */
diff --git a/rtnl_route.c b/rtnl_route.c
new file mode 100644
index 0000000..f25d038
--- /dev/null
+++ b/rtnl_route.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2016 Fabien Siron <fabien.siron at epita.fr>
+ * Copyright (c) 2017 JingPiao Chen <chenjingpiao at 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 <linux/ip.h>
+#include "netlink.h"
+#include <linux/rtnetlink.h>
+
+#include "xlat/ip_type_of_services.h"
+#include "xlat/routing_flags.h"
+#include "xlat/routing_protocols.h"
+#include "xlat/routing_table_ids.h"
+#include "xlat/routing_types.h"
+
+DECL_NETLINK_ROUTE_DECODER(decode_rtmsg)
+{
+ struct rtmsg rtmsg = { .rtm_family = family };
+ const size_t offset = sizeof(rtmsg.rtm_family);
+
+ PRINT_FIELD_XVAL("{", rtmsg, rtm_family, addrfams, "AF_???");
+
+ tprints(", ");
+ if (len >= sizeof(rtmsg)) {
+ if (!umoven_or_printaddr(tcp, addr + offset,
+ sizeof(rtmsg) - offset,
+ (void *) &rtmsg + offset)) {
+ PRINT_FIELD_U("", rtmsg, rtm_dst_len);
+ PRINT_FIELD_U(", ", rtmsg, rtm_src_len);
+ PRINT_FIELD_FLAGS(", ", rtmsg, rtm_tos,
+ ip_type_of_services, "IPTOS_TOS_???");
+ PRINT_FIELD_XVAL(", ", rtmsg, rtm_table,
+ routing_table_ids, NULL);
+ PRINT_FIELD_XVAL(", ", rtmsg, rtm_protocol,
+ routing_protocols, "RTPROT_???");
+ PRINT_FIELD_XVAL(", ", rtmsg, rtm_scope,
+ routing_scopes, NULL);
+ PRINT_FIELD_XVAL(", ", rtmsg, rtm_type,
+ routing_types, "RTN_???");
+ PRINT_FIELD_FLAGS(", ", rtmsg, rtm_flags,
+ routing_flags, "RTM_F_???");
+ }
+ } else
+ tprints("...");
+ tprints("}");
+}
diff --git a/xlat/ip_type_of_services.in b/xlat/ip_type_of_services.in
new file mode 100644
index 0000000..41c526a
--- /dev/null
+++ b/xlat/ip_type_of_services.in
@@ -0,0 +1,4 @@
+IPTOS_LOWDELAY
+IPTOS_THROUGHPUT
+IPTOS_RELIABILITY
+IPTOS_MINCOST
diff --git a/xlat/routing_flags.in b/xlat/routing_flags.in
new file mode 100644
index 0000000..fe66b67
--- /dev/null
+++ b/xlat/routing_flags.in
@@ -0,0 +1,5 @@
+RTM_F_NOTIFY
+RTM_F_CLONED
+RTM_F_EQUALIZE
+RTM_F_PREFIX
+RTM_F_LOOKUP_TABLE
diff --git a/xlat/routing_protocols.in b/xlat/routing_protocols.in
new file mode 100644
index 0000000..d366b67
--- /dev/null
+++ b/xlat/routing_protocols.in
@@ -0,0 +1,16 @@
+RTPROT_UNSPEC
+RTPROT_REDIRECT
+RTPROT_KERNEL
+RTPROT_BOOT
+RTPROT_STATIC
+RTPROT_GATED
+RTPROT_RA
+RTPROT_MRT
+RTPROT_ZEBRA
+RTPROT_BIRD
+RTPROT_DNROUTED
+RTPROT_XORP
+RTPROT_NTK
+RTPROT_DHCP
+RTPROT_MROUTED
+RTPROT_BABEL
diff --git a/xlat/routing_table_ids.in b/xlat/routing_table_ids.in
new file mode 100644
index 0000000..6a1f797
--- /dev/null
+++ b/xlat/routing_table_ids.in
@@ -0,0 +1,5 @@
+RT_TABLE_UNSPEC 0
+RT_TABLE_COMPAT 252
+RT_TABLE_DEFAULT 253
+RT_TABLE_MAIN 254
+RT_TABLE_LOCAL 255
diff --git a/xlat/routing_types.in b/xlat/routing_types.in
new file mode 100644
index 0000000..f7079d4
--- /dev/null
+++ b/xlat/routing_types.in
@@ -0,0 +1,12 @@
+RTN_UNSPEC 0
+RTN_UNICAST 1
+RTN_LOCAL 2
+RTN_BROADCAST 3
+RTN_ANYCAST 4
+RTN_MULTICAST 5
+RTN_BLACKHOLE 6
+RTN_UNREACHABLE 7
+RTN_PROHIBIT 8
+RTN_THROW 9
+RTN_NAT 10
+RTN_XRESOLVE 11
--
2.7.4
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