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authorTobias Klauser <tklauser@distanz.ch>2015-10-19 17:20:26 +0200
committerTobias Klauser <tklauser@distanz.ch>2015-10-19 17:25:33 +0200
commitf5f002fd8966b78ece5b4e1757e639379619670a (patch)
tree496b04c29c2c184f770407ea25e47ea6abd9f630
parent83e0c196b189513318093a6bf94f783c95e37b4f (diff)
netsniff-ng: nlmsg: Display raw data if family is unknown
Currently we only support full dissection of RTNL netlink messages. For non-RTNL message we only print the header and omit the data. Change this behavior and print a full ascii/hex dump of the remaining data (like it is done in dissector_entry_point() for trailing data after all known protocols have been processed) to give the user a chance to still inspect the message content. Reported-by: Geoff Ladwig <gladwig@verdantnetworks.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
-rw-r--r--proto_nlmsg.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/proto_nlmsg.c b/proto_nlmsg.c
index 6f0a13d..ce97c6d 100644
--- a/proto_nlmsg.c
+++ b/proto_nlmsg.c
@@ -704,6 +704,16 @@ static void rtnl_msg_print(struct nlmsghdr *hdr)
}
}
+static void nlmsg_print_raw(struct nlmsghdr *hdr)
+{
+ u32 len = hdr->nlmsg_len;
+
+ if (len) {
+ _ascii((uint8_t *) hdr + NLMSG_HDRLEN, len - NLMSG_HDRLEN);
+ _hex((uint8_t *) hdr + NLMSG_HDRLEN, len - NLMSG_HDRLEN);
+ }
+}
+
static void nlmsg_print(uint16_t family, struct nlmsghdr *hdr)
{
u16 nlmsg_flags = hdr->nlmsg_flags;
@@ -747,6 +757,8 @@ static void nlmsg_print(uint16_t family, struct nlmsghdr *hdr)
if (family == NETLINK_ROUTE)
rtnl_msg_print(hdr);
+ else
+ nlmsg_print_raw(hdr);
}
static void nlmsg(struct pkt_buff *pkt)