[PATCH v2 01/25] netlink: add a basic rtnetlink parser of addr messages
JingPiao Chen
chenjingpiao at gmail.com
Sun Aug 13 02:22:19 UTC 2017
* rtnl_addr.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* configure.ac (AC_CHECK_HEADERS): Add linux/if_addr.h.
* netlink_route.h (decode_ifaddrmsg): New prototype.
* netlink_route.c (route_decoders): Add RTM_DELADDR,
RTM_GETADDR, RTM_GETANYCAST, RTM_GETMULTICAST add RTM_NEWADDR.
* xlat/ifaddrflags.in: New file.
* xlat/routing_scopes.in: Likewise.
Co-authored-by: Fabien Siron <fabien.siron at epita.fr>
---
Makefile.am | 1 +
configure.ac | 1 +
netlink_route.c | 8 ++++++-
netlink_route.h | 1 +
rtnl_addr.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++
xlat/ifaddrflags.in | 12 ++++++++++
xlat/routing_scopes.in | 5 ++++
7 files changed, 90 insertions(+), 1 deletion(-)
create mode 100644 rtnl_addr.c
create mode 100644 xlat/ifaddrflags.in
create mode 100644 xlat/routing_scopes.in
diff --git a/Makefile.am b/Makefile.am
index 5ec0fa3..ff11a91 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -247,6 +247,7 @@ strace_SOURCES = \
rt_sigframe.c \
rt_sigreturn.c \
rtc.c \
+ rtnl_addr.c \
rtnl_link.c \
sched.c \
sched_attr.h \
diff --git a/configure.ac b/configure.ac
index 67ec7fe..d213a46 100644
--- a/configure.ac
+++ b/configure.ac
@@ -380,6 +380,7 @@ AC_CHECK_HEADERS(m4_normalize([
linux/fiemap.h
linux/genetlink.h
linux/hiddev.h
+ linux/if_addr.h
linux/ip_vs.h
linux/ipc.h
linux/mmtimer.h
diff --git a/netlink_route.c b/netlink_route.c
index f6d569b..5e3ed24 100644
--- a/netlink_route.c
+++ b/netlink_route.c
@@ -55,7 +55,13 @@ static const netlink_route_decoder_t route_decoders[] = {
[RTM_DELLINK - RTM_BASE] = decode_ifinfomsg,
[RTM_GETLINK - RTM_BASE] = decode_ifinfomsg,
[RTM_NEWLINK - RTM_BASE] = decode_ifinfomsg,
- [RTM_SETLINK - RTM_BASE] = decode_ifinfomsg
+ [RTM_SETLINK - RTM_BASE] = decode_ifinfomsg,
+
+ [RTM_DELADDR - RTM_BASE] = decode_ifaddrmsg,
+ [RTM_GETADDR - RTM_BASE] = decode_ifaddrmsg,
+ [RTM_GETANYCAST - RTM_BASE] = decode_ifaddrmsg,
+ [RTM_GETMULTICAST - RTM_BASE] = decode_ifaddrmsg,
+ [RTM_NEWADDR - RTM_BASE] = decode_ifaddrmsg
};
bool
diff --git a/netlink_route.h b/netlink_route.h
index cc2b5c2..f644d61 100644
--- a/netlink_route.h
+++ b/netlink_route.h
@@ -39,6 +39,7 @@ route_decode_name(struct tcb *tcp, \
unsigned int len) \
/* End of DECL_NETLINK_ROUTE_DECODER definition. */
+extern DECL_NETLINK_ROUTE_DECODER(decode_ifaddrmsg);
extern DECL_NETLINK_ROUTE_DECODER(decode_ifinfomsg);
#endif /* !STRACE_NETLINK_ROUTE_H */
diff --git a/rtnl_addr.c b/rtnl_addr.c
new file mode 100644
index 0000000..689c18e
--- /dev/null
+++ b/rtnl_addr.c
@@ -0,0 +1,63 @@
+/*
+ * 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"
+
+#ifdef HAVE_LINUX_IF_ADDR_H
+# include <linux/if_addr.h>
+#endif
+
+#include "xlat/ifaddrflags.h"
+#include "xlat/routing_scopes.h"
+
+DECL_NETLINK_ROUTE_DECODER(decode_ifaddrmsg)
+{
+ struct ifaddrmsg ifaddr = { .ifa_family = family };
+ const size_t offset = sizeof(ifaddr.ifa_family);
+
+ PRINT_FIELD_XVAL("{", ifaddr, ifa_family, addrfams, "AF_???");
+
+ tprints(", ");
+ if (len >= sizeof(ifaddr)) {
+ if (!umoven_or_printaddr(tcp, addr + offset,
+ sizeof(ifaddr) - offset,
+ (void *) &ifaddr + offset)) {
+ PRINT_FIELD_U("", ifaddr, ifa_prefixlen);
+ PRINT_FIELD_FLAGS(", ", ifaddr, ifa_flags,
+ ifaddrflags, "IFA_F_???");
+ PRINT_FIELD_XVAL(", ", ifaddr, ifa_scope,
+ routing_scopes, NULL);
+ PRINT_FIELD_IFINDEX(", ", ifaddr, ifa_index);
+ }
+ } else
+ tprints("...");
+ tprints("}");
+}
diff --git a/xlat/ifaddrflags.in b/xlat/ifaddrflags.in
new file mode 100644
index 0000000..19df46b
--- /dev/null
+++ b/xlat/ifaddrflags.in
@@ -0,0 +1,12 @@
+IFA_F_SECONDARY
+IFA_F_NODAD
+IFA_F_OPTIMISTIC
+IFA_F_DADFAILED
+IFA_F_HOMEADDRESS
+IFA_F_DEPRECATED
+IFA_F_TENTATIVE
+IFA_F_PERMANENT
+IFA_F_MANAGETEMPADDR
+IFA_F_NOPREFIXROUTE
+IFA_F_MCAUTOJOIN
+IFA_F_STABLE_PRIVACY
diff --git a/xlat/routing_scopes.in b/xlat/routing_scopes.in
new file mode 100644
index 0000000..c431e9f
--- /dev/null
+++ b/xlat/routing_scopes.in
@@ -0,0 +1,5 @@
+RT_SCOPE_UNIVERSE 0
+RT_SCOPE_SITE 200
+RT_SCOPE_LINK 253
+RT_SCOPE_HOST 254
+RT_SCOPE_NOWHERE 255
--
2.7.4
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