Silly, since its easy to fetch this via libmnl.
Unfortunately there is a large number of software that uses the old
API, so add a helper to return the attribute.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
fixmanpages.sh | 6 ++--
.../libnetfilter_queue/libnetfilter_queue.h | 1 +
src/libnetfilter_queue.c | 31 +++++++++++++++++++
3 files changed, 36 insertions(+), 2 deletions(-)
diff --git a/fixmanpages.sh b/fixmanpages.sh
index 897086bad6df..4d12247d14f6 100755
--- a/fixmanpages.sh
+++ b/fixmanpages.sh
@@ -11,8 +11,10 @@ function main
add2group nfq_get_nfmark nfq_get_timestamp nfq_get_indev nfq_get_physindev
add2group nfq_get_outdev nfq_get_physoutdev nfq_get_indev_name
add2group nfq_get_physindev_name nfq_get_outdev_name
- add2group nfq_get_physoutdev_name nfq_get_packet_hw nfq_get_uid
- add2group nfq_get_gid nfq_get_secctx nfq_get_payload
+ add2group nfq_get_physoutdev_name nfq_get_packet_hw
+ add2group nfq_get_skbinfo
+ add2group nfq_get_uid nfq_get_gid
+ add2group nfq_get_secctx nfq_get_payload
setgroup Queue nfq_fd
add2group nfq_create_queue nfq_destroy_queue nfq_handle_packet nfq_set_mode
add2group nfq_set_queue_flags nfq_set_queue_maxlen nfq_set_verdict
diff --git a/include/libnetfilter_queue/libnetfilter_queue.h b/include/libnetfilter_queue/libnetfilter_queue.h
index 092c57d07451..46e14e135458 100644
--- a/include/libnetfilter_queue/libnetfilter_queue.h
+++ b/include/libnetfilter_queue/libnetfilter_queue.h
@@ -103,6 +103,7 @@ extern uint32_t nfq_get_indev(struct nfq_data *nfad);
extern uint32_t nfq_get_physindev(struct nfq_data *nfad);
extern uint32_t nfq_get_outdev(struct nfq_data *nfad);
extern uint32_t nfq_get_physoutdev(struct nfq_data *nfad);
+extern uint32_t nfq_get_skbinfo(struct nfq_data *nfad);
extern int nfq_get_uid(struct nfq_data *nfad, uint32_t *uid);
extern int nfq_get_gid(struct nfq_data *nfad, uint32_t *gid);
extern int nfq_get_secctx(struct nfq_data *nfad, unsigned char **secdata);
diff --git a/src/libnetfilter_queue.c b/src/libnetfilter_queue.c
index 3cf9653393e6..f5462a374b80 100644
--- a/src/libnetfilter_queue.c
+++ b/src/libnetfilter_queue.c
@@ -1210,6 +1210,37 @@ struct nfqnl_msg_packet_hw *nfq_get_packet_hw(struct nfq_data *nfad)
struct nfqnl_msg_packet_hw);
}
+/**
+ * nfq_get_skbinfo - return the NFQA_SKB_INFO meta information
+ * \param nfad Netlink packet data handle passed to callback function
+ *
+ * This can be used to obtain extra information about a packet by testing
+ * the returned integer for any of the following bit flags:
+ *
+ * - NFQA_SKB_CSUMNOTREADY
+ * packet header checksums will be computed by hardware later on, i.e.
+ * tcp/ip checksums in the packet must not be validated, application
+ * should pretend they are correct.
+ * - NFQA_SKB_GSO
+ * packet is an aggregated super-packet. It exceeds device mtu and will
+ * be (re-)split on transmit by hardware.
+ * - NFQA_SKB_CSUM_NOTVERIFIED
+ * packet checksum was not yet verified by the kernel/hardware, for
+ * example because this is an incoming packet and the NIC does not
+ * perform checksum validation at hardware level.
+ * See nfq_set_queue_flags() documentation for more information.
+ *
+ * \return the skbinfo value
+ */
+EXPORT_SYMBOL
+uint32_t nfq_get_skbinfo(struct nfq_data *nfad)
+{
+ if (!nfnl_attr_present(nfad->data, NFQA_SKB_INFO))
+ return 0;
+
+ return ntohl(nfnl_get_data(nfad->data, NFQA_SKB_INFO, uint32_t));
+}
+
/**
* nfq_get_uid - get the UID of the user the packet belongs to
* \param nfad Netlink packet data handle passed to callback function
--
2.24.1
