--- qemu-0.14.1/Makefile.objs.orig Thu Jun 23 17:44:50 2011
+++ qemu-0.14.1/Makefile.objs Thu Jun 23 17:45:01 2011
@@ -34,6 +34,7 @@
net-nested-y = queue.o checksum.o util.o
net-nested-y += socket.o
net-nested-y += dump.o
+net-nested-y += udp.o
net-nested-$(CONFIG_POSIX) += tap.o
net-nested-$(CONFIG_LINUX) += tap-linux.o
net-nested-$(CONFIG_WIN32) += tap-win32.o

--- qemu-0.14.1/block/raw-win32.c.orig Thu Jun 23 17:04:36 2011
+++ qemu-0.14.1/block/raw-win32.c Thu Jun 23 17:05:31 2011
@@ -93,7 +93,7 @@
else if (!(flags & BDRV_O_CACHE_WB))
overlapped |= FILE_FLAG_WRITE_THROUGH;
s->hfile = CreateFile(filename, access_flags,
- FILE_SHARE_READ, NULL,
+ FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, overlapped, NULL);
if (s->hfile == INVALID_HANDLE_VALUE) {
int err = GetLastError();
@@ -354,7 +354,7 @@
else if (!(flags & BDRV_O_CACHE_WB))
overlapped |= FILE_FLAG_WRITE_THROUGH;
s->hfile = CreateFile(filename, access_flags,
- FILE_SHARE_READ, NULL,
+ FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
create_flags, overlapped, NULL);
if (s->hfile == INVALID_HANDLE_VALUE) {
int err = GetLastError();

--- qemu-0.14.1/hw/e1000.c.orig Thu Jun 23 17:01:19 2011
+++ qemu-0.14.1/hw/e1000.c Thu Jun 23 17:02:30 2011
@@ -573,7 +573,7 @@
if (rctl & E1000_RCTL_UPE) // promiscuous
return 1;

- if ((buf[0] & 1) && (rctl & E1000_RCTL_MPE)) // promiscuous mcast
+ if (buf[0] & 1) // promiscuous mcast
return 1;

if ((rctl & E1000_RCTL_BAM) && !memcmp(buf, bcast, sizeof bcast))

--- qemu-0.14.1/net/udp.c.orig Thu Jun 23 17:09:02 2011
+++ qemu-0.14.1/net/udp.c Thu Jun 23 17:10:17 2011
@@ -0,0 +1,138 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "net/udp.h"
+
+#include "config-host.h"
+
+#ifndef _WIN32
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <netinet/udp.h>
+#endif
+
+#include "net.h"
+#include "qemu-char.h"
+#include "qemu-common.h"
+#include "qemu-option.h"
+#include "qemu_socket.h"
+#include "sysemu.h"
+
+
+typedef struct UDPState {
+ VLANClientState nc;
+ int rfd;
+ struct sockaddr_in sender;
+} UDPState;
+
+static void udp_to_qemu(void *opaque)
+{
+ UDPState *s = opaque;
+ uint8_t buf[4096];
+ int size;
+
+ size = recvfrom(s->rfd, (char *)buf, sizeof(buf), 0, NULL, NULL);
+ if (size > 0) {
+ qemu_send_packet(&s->nc, buf, size);
+ }
+}
+
+static ssize_t udp_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
+{
+ UDPState *s = DO_UPCAST(UDPState, nc, nc);
+ int ret;
+
+ do {
+ ret = sendto(s->rfd, (const char *)buf, size, 0, (struct sockaddr *)&s->sender, sizeof (s->sender));
+ } while (ret < 0 && errno == EINTR);
+
+ return ret;
+}
+
+static void udp_cleanup(VLANClientState *nc)
+{
+ UDPState *s = DO_UPCAST(UDPState, nc, nc);
+ qemu_set_fd_handler(s->rfd, NULL, NULL, NULL);
+ close(s->rfd);
+}
+
+static NetClientInfo net_udp_info = {
+ .type = NET_CLIENT_TYPE_UDP,
+ .size = sizeof(UDPState),
+ .receive = udp_receive,
+ .cleanup = udp_cleanup,
+};
+
+static int net_udp_init(VLANState *vlan, const char *model,
+ const char *name, int sport,
+ const char *daddr, int dport)
+{
+ VLANClientState *nc;
+ UDPState *s;
+ struct sockaddr_in receiver;
+ int ret;
+
+ nc = qemu_new_net_client(&net_udp_info, vlan, NULL, model, name);
+
+ snprintf(nc->info_str, sizeof(nc->info_str),"udp: %i->%s:%i",
+ sport, daddr, dport);
+
+ s = DO_UPCAST(UDPState, nc, nc);
+
+ s->rfd = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
+ receiver.sin_family = AF_INET;
+ receiver.sin_addr.s_addr = INADDR_ANY;
+ receiver.sin_port = htons(sport);
+ ret = bind(s->rfd, (struct sockaddr *)&receiver, sizeof(receiver));
+
+ if (ret == -1) {
+ fprintf (stderr, "bind error:%s\n", strerror(errno));
+ return ret;
+ }
+
+ memset((char*)&s->sender, 0,sizeof(s->sender));
+ s->sender.sin_family = AF_INET;
+ s->sender.sin_port = htons(dport);
+ inet_aton(daddr, &s->sender.sin_addr);
+
+ qemu_set_fd_handler(s->rfd, udp_to_qemu, NULL, s);
+
+ return 0;
+}
+
+int net_init_udp(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
+{
+ const char *daddr;
+ int sport, dport;
+
+ daddr = qemu_opt_get(opts, "daddr");
+
+ sport = qemu_opt_get_number(opts, "sport", 0);
+ dport = qemu_opt_get_number(opts, "dport", 0);
+
+ if (net_udp_init(vlan, "udp", name, sport, daddr, dport) == -1) {
+ return -1;
+ }
+
+ return 0;
+}

--- qemu-0.14.1/net/udp.h.orig Thu Jun 23 17:12:45 2011
+++ qemu-0.14.1/net/udp.h Thu Jun 23 17:12:28 2011
@@ -0,0 +1,32 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef QEMU_NET_UDP_H
+#define QEMU_NET_UDP_H
+
+#include "qemu-common.h"
+#include "qemu-option.h"
+
+int net_init_udp(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan);
+
+#endif /* QEMU_NET_UDP_H */

--- qemu-0.14.1/net.c.orig Thu Jun 23 17:16:49 2011
+++ qemu-0.14.1/net.c Thu Jun 23 17:22:17 2011
@@ -30,6 +30,7 @@
#include "net/dump.h"
#include "net/slirp.h"
#include "net/vde.h"
+#include "net/udp.h"
#include "net/util.h"
#include "monitor.h"
#include "sysemu.h"
@@ -1087,6 +1088,26 @@
{ /* end of list */ }
},
#endif
+ }, {
+ .type = "udp",
+ .init = net_init_udp,
+ .desc = {
+ NET_COMMON_PARAMS_DESC,
+ {
+ .name = "sport",
+ .type = QEMU_OPT_NUMBER,
+ .help = "source port number",
+ }, {
+ .name = "daddr",
+ .type = QEMU_OPT_STRING,
+ .help = "destination IP address",
+ }, {
+ .name = "dport",
+ .type = QEMU_OPT_NUMBER,
+ .help = "destination port number",
+ },
+ { /* end of list */ }
+ },
}, {
.type = "dump",
.init = net_init_dump,

--- qemu-0.14.1/net.h.orig Thu Jun 23 17:23:17 2011
+++ qemu-0.14.1/net.h Thu Jun 23 17:23:43 2011
@@ -35,6 +35,7 @@
NET_CLIENT_TYPE_TAP,
NET_CLIENT_TYPE_SOCKET,
NET_CLIENT_TYPE_VDE,
+ NET_CLIENT_TYPE_UDP,
NET_CLIENT_TYPE_DUMP
} net_client_type;

I never had significant success getting my patches into qemu, their development process certainly does not work for me and I gave up on it.
If some of my patches did end up in qemu that was pure luck.
Since in addition my current employer for its own reasons discourages involvement with qemu I'm afraid I can't help, sorry.
But I expect that if you ask persistently enough on their mailing list someone will ultimately feel pity and at least try to help :-)

apologies for a dumb question, but after patching qemu-0.14.1 with the udp-mcast patches, is there a configure option that must be used?

My usual configure is:

./configure --enable-kvm <cr>

Do I need an --enable-udp-mcast or something like that? The source doesn't seem to show that, but I'm not fluent in that stuff yet.

Thanks.

Ok, thanks. Although it means that my problem(s) is elsewhere. Was hoping the unknown config setting was the answer to topic4033.html

thx again.

I have tried 0.13, 0.15 (both patched) and always end up with no interfaces :(