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[Qemu-devel] [RFC][PATCH 13/15] virtproxy: add read handler for proxied
From: |
Michael Roth |
Subject: |
[Qemu-devel] [RFC][PATCH 13/15] virtproxy: add read handler for proxied connections |
Date: |
Fri, 22 Oct 2010 13:43:29 -0500 |
reads data from client/server connections as they become readable, then
sends the data over the channel
Signed-off-by: Michael Roth <address@hidden>
---
virtproxy.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 80 insertions(+), 0 deletions(-)
diff --git a/virtproxy.c b/virtproxy.c
index 86a8e5b..f3f7f46 100644
--- a/virtproxy.c
+++ b/virtproxy.c
@@ -200,6 +200,86 @@ static VPIForward *get_iforward(const VPDriver *drv, const
char *service_id)
return NULL;
}
+/* read handler for proxied connections */
+static void vp_conn_read(void *opaque)
+{
+ VPConn *conn = opaque;
+ VPDriver *drv = conn->drv;
+ VPPacket pkt;
+ char buf[VP_CONN_DATA_LEN];
+ int fd, count, ret;
+ bool client;
+
+ TRACE("called with opaque: %p, drv: %p", opaque, drv);
+
+ if (conn->state != VP_STATE_CONNECTED) {
+ LOG("invalid connection state");
+ return;
+ }
+
+ if (conn->type != VP_CONN_CLIENT && conn->type != VP_CONN_SERVER) {
+ LOG("invalid connection type");
+ return;
+ }
+
+ /* TODO: all fields should be explicitly set so we shouldn't
+ * need to memset. this might hurt if we beef up VPPacket size
+ */
+ memset(&pkt, 0, sizeof(VPPacket));
+ pkt.magic = VP_MAGIC;
+
+ if (conn->type == VP_CONN_CLIENT) {
+ client = true;
+ fd = conn->client_fd;
+ } else {
+ client = false;
+ fd = conn->server_fd;
+ }
+
+ count = read(fd, buf, VP_CONN_DATA_LEN);
+ if (count == -1) {
+ LOG("read() failed: %s", strerror(errno));
+ return;
+ } else if (count == 0) {
+ /* connection closed, tell remote end to clean up */
+ TRACE("connection closed");
+ pkt.type = VP_PKT_CONTROL;
+ pkt.payload.msg.type = VP_CONTROL_CLOSE;
+ if (client) {
+ /* we're closing the client, have remote close the server conn */
+ TRACE("closing connection for client fd %d", conn->client_fd);
+ pkt.payload.msg.args.close.client_fd = -1;
+ pkt.payload.msg.args.close.server_fd = conn->server_fd;
+ } else {
+ TRACE("closing connection for server fd %d", conn->server_fd);
+ pkt.payload.msg.args.close.server_fd = -1;
+ pkt.payload.msg.args.close.client_fd = conn->client_fd;;
+ }
+ /* clean up things on our end */
+ closesocket(fd);
+ vp_set_fd_handler(fd, NULL, NULL, NULL);
+ QLIST_REMOVE(conn, next);
+ qemu_free(conn);
+ } else {
+ TRACE("data read");
+ pkt.type = client ? VP_PKT_CLIENT : VP_PKT_SERVER;
+ pkt.payload.proxied.client_fd = conn->client_fd;
+ pkt.payload.proxied.server_fd = conn->server_fd;
+ memcpy(pkt.payload.proxied.data, buf, count);
+ pkt.payload.proxied.bytes = count;
+ }
+
+ ret = vp_send_all(drv->channel_fd, (void *)&pkt, sizeof(VPPacket));
+ if (ret == -1) {
+ LOG("error sending data over channel");
+ return;
+ }
+ if (ret != sizeof(VPPacket)) {
+ TRACE("buffer full?");
+ return;
+ }
+}
+
/* accept handler for communication channel
*
* accept()s connection to communication channel (for sockets), and sets
--
1.7.0.4
- [Qemu-devel] [RFC][PATCH 06/15] virtproxy: add read handler for communication channel, (continued)
- [Qemu-devel] [RFC][PATCH 06/15] virtproxy: add read handler for communication channel, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 02/15] virtproxy: qemu-vp, standalone daemon skeleton, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 07/15] virtproxy: add vp_new() VPDriver constructor, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 03/15] virtproxy: add debug functions for virtproxy core, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 08/15] virtproxy: interfaces to set/remove/handle VPOForwards, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 09/15] virtproxy: add handler for data packets, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 10/15] virtproxy: add handler for control packet, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 11/15] virtproxy: add vp_handle_packet(), Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 12/15] virtproxy: interfaces to set/remove VPIForwards, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 01/15] virtproxy: base data structures and constants, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 13/15] virtproxy: add read handler for proxied connections,
Michael Roth <=
- [Qemu-devel] [RFC][PATCH 15/15] virtproxy: qemu-vp, main logic, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 04/15] virtproxy: list look-up functions conns/oforwards/iforwards, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 14/15] virtproxy: Makefile/configure changes to build qemu-vp, Michael Roth, 2010/10/22
- [Qemu-devel] [RFC][PATCH 05/15] virtproxy: add accept handler for communication channel, Michael Roth, 2010/10/22
- Re: [Qemu-devel] [RFC][PATCH 00/15] virtproxy: host/guest communication layer, Blue Swirl, 2010/10/23