@@ -24,6 +24,7 @@
#include "config-host.h"
#include "net/net.h"
+#include "net/filter.h"
#include "clients.h"
#include "hub.h"
#include "net/slirp.h"
@@ -601,6 +602,44 @@ int qemu_can_send_packet(NetClientState *sender)
return 1;
}
+static ssize_t filter_receive_iov(NetClientState *nc, int chain,
+ NetClientState *sender,
+ unsigned flags,
+ const struct iovec *iov,
+ int iovcnt)
+{
+ ssize_t ret = 0;
+ Filter *filter = NULL;
+ NetFilterState *nf = NULL;
+ ssize_t size = iov_size(iov, iovcnt);
+
+ QTAILQ_FOREACH(filter, &nc->filters, next) {
+ nf = filter->nf;
+ if (nf->chain == chain || nf->chain == NET_FILTER_ALL) {
+ ret = nf->info->receive_iov(nf, sender, flags, iov, iovcnt);
+ if (ret == size) {
+ return ret;
+ }
+ }
+ }
+
+ return ret;
+}
+
+static ssize_t filter_receive(NetClientState *nc, int chain,
+ NetClientState *sender,
+ unsigned flags,
+ const uint8_t *data,
+ size_t size)
+{
+ struct iovec iov = {
+ .iov_base = (void *)data,
+ .iov_len = size
+ };
+
+ return filter_receive_iov(nc, chain, sender, flags, &iov, 1);
+}
+
ssize_t qemu_deliver_packet(NetClientState *sender,
unsigned flags,
const uint8_t *data,
@@ -672,6 +711,7 @@ static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
NetPacketSent *sent_cb)
{
NetQueue *queue;
+ int ret;
#ifdef DEBUG_NET
printf("qemu_send_packet_async:\n");
@@ -682,6 +722,18 @@ static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
return size;
}
+ /* Let filters handle the packet first */
+ ret = filter_receive(sender, NET_FILTER_OUT, sender, flags, buf, size);
+ if (ret == size) {
+ return size;
+ }
+
+ ret = filter_receive(sender->peer, NET_FILTER_IN,
+ sender, flags, buf, size);
+ if (ret == size) {
+ return size;
+ }
+
queue = sender->peer->incoming_queue;
return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
@@ -752,9 +804,24 @@ ssize_t qemu_sendv_packet_async(NetClientState *sender,
NetPacketSent *sent_cb)
{
NetQueue *queue;
+ int size = iov_size(iov, iovcnt);
+ int ret;
if (sender->link_down || !sender->peer) {
- return iov_size(iov, iovcnt);
+ return size;
+ }
+
+ /* Let filters handle the packet first */
+ ret = filter_receive_iov(sender, NET_FILTER_OUT,
+ sender, QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt);
+ if (ret == size) {
+ return size;
+ }
+
+ ret = filter_receive_iov(sender->peer, NET_FILTER_IN,
+ sender, QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt);
+ if (ret == size) {
+ return size;
}
queue = sender->peer->incoming_queue;
Capture packets that will be sent. Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com> --- net/net.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 68 insertions(+), 1 deletion(-)