[PATCH qemu-kvm] Add raw(af_packet) network backend to qemu

Sridhar Samudrala
2010-01-26T20:40:36Z

This patch adds raw socket backend to qemu and is based on Or Gerlitz's
patch re-factored and ported to the latest qemu-kvm git tree.
It also includes support for vnet_hdr option that enables gso/checksum
offload with raw backend. You can find the linux kernel patch to support
this feature here.
http://thread.gmane.org/gmane.linux.network/150308

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>

diff --git a/Makefile.objs b/Makefile.objs
index 357d305..4468124 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -34,6 +34,8 @@ net-nested-$(CONFIG_SOLARIS) += tap-solaris.o
net-nested-$(CONFIG_AIX) += tap-aix.o
net-nested-$(CONFIG_SLIRP) += slirp.o
net-nested-$(CONFIG_VDE) += vde.o
+net-nested-$(CONFIG_POSIX) += raw.o
+net-nested-$(CONFIG_LINUX) += raw-linux.o
net-obj-y += $(addprefix net/, $(net-nested-y))

######################################################################
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index eba578a..4aa40f2 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -15,6 +15,7 @@
#include "net.h"
#include "net/checksum.h"
#include "net/tap.h"
+#include "net/raw.h"
#include "qemu-timer.h"
#include "virtio-net.h"

@@ -133,6 +134,9 @@ static int peer_has_vnet_hdr(VirtIONet *n)
case NET_CLIENT_TYPE_TAP:
n->has_vnet_hdr = tap_has_vnet_hdr(n->nic->nc.peer);
break;
+ case NET_CLIENT_TYPE_RAW:
+ n->has_vnet_hdr = raw_has_vnet_hdr(n->nic->nc.peer);
+ break;
default:
return 0;
}
@@ -149,6 +153,9 @@ static int peer_has_ufo(VirtIONet *n)
case NET_CLIENT_TYPE_TAP:
n->has_ufo = tap_has_ufo(n->nic->nc.peer);
break;
+ case NET_CLIENT_TYPE_RAW:
+ n->has_ufo = raw_has_ufo(n->nic->nc.peer);
+ break;
default:
return 0;
}
@@ -165,6 +172,9 @@ static void peer_using_vnet_hdr(VirtIONet *n, int using_vnet_hdr)
case NET_CLIENT_TYPE_TAP:
tap_using_vnet_hdr(n->nic->nc.peer, using_vnet_hdr);
break;
+ case NET_CLIENT_TYPE_RAW:
+ raw_using_vnet_hdr(n->nic->nc.peer, using_vnet_hdr);
+ break;
default:
break;
}
@@ -180,6 +190,9 @@ static void peer_set_offload(VirtIONet *n, int csum, int tso4, int tso6,
case NET_CLIENT_TYPE_TAP:
tap_set_offload(n->nic->nc.peer, csum, tso4, tso6, ecn, ufo);
break;
+ case NET_CLIENT_TYPE_RAW:
+ raw_set_offload(n->nic->nc.peer, csum, tso4, tso6, ecn, ufo);
+ break;
default:
break;
}
diff --git a/net.c b/net.c
index 6ef93e6..1ca2415 100644
--- a/net.c
+++ b/net.c
@@ -26,6 +26,7 @@
#include "config-host.h"

#include "net/tap.h"
+#include "net/raw.h"
#include "net/socket.h"
#include "net/dump.h"
#include "net/slirp.h"
@@ -1004,6 +1005,27 @@ static struct {
},
{ /* end of list */ }
},
+ }, {
+ .type = "raw",
+ .init = net_init_raw,
+ .desc = {
+ NET_COMMON_PARAMS_DESC,
+ {
+ .name = "fd",
+ .type = QEMU_OPT_STRING,
+ .help = "file descriptor of an already opened raw socket",
+ }, {
+ .name = "ifname",
+ .type = QEMU_OPT_STRING,
+ .help = "interface name",
+ }, {
+ .name = "vnet_hdr",
+ .type = QEMU_OPT_BOOL,
+ .help = "enable PACKET_VNET_HDR option on the raw interface"
+ },
+ { /* end of list */ }
+ },
+
#ifdef CONFIG_VDE
}, {
.type = "vde",
@@ -1076,6 +1098,7 @@ int net_client_init(Monitor *mon, QemuOpts *opts, int is_netdev)
#ifdef CONFIG_VDE
strcmp(type, "vde") != 0 &&
#endif
+ strcmp(type, "raw") != 0 &&
strcmp(type, "socket") != 0) {
qemu_error("The '%s' network backend type is not valid with -netdev\n",
type);
diff --git a/net.h b/net.h
index 116bb80..4722185 100644
--- a/net.h
+++ b/net.h
@@ -34,7 +34,8 @@ typedef enum {
NET_CLIENT_TYPE_TAP,
NET_CLIENT_TYPE_SOCKET,
NET_CLIENT_TYPE_VDE,
- NET_CLIENT_TYPE_DUMP
+ NET_CLIENT_TYPE_DUMP,
+ NET_CLIENT_TYPE_RAW,
} net_client_type;

typedef void (NetPoll)(VLANClientState *, bool enable);
diff --git a/net/raw-linux.c b/net/raw-linux.c
new file mode 100644
index 0000000..9ed2e6a
--- /dev/null
+++ b/net/raw-linux.c
@@ -0,0 +1,97 @@
+/*
+ * 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/raw.h"
+#include "net/raw-linux.h"
+
+#include <netpacket/packet.h>
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+
+#include "sysemu.h"
+#include "qemu-common.h"
+
+int raw_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
+{
+ struct ifreq req;
+ int fd, ret;
+ struct sockaddr_ll lladdr;
+ int val;
+
+ fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
+ if (fd < 0)
+ fprintf(stderr, "packet socket failed\n");
+
+ memset(&req, 0, sizeof(req));
+ strncpy(req.ifr_name, ifname, IFNAMSIZ-1);
+ ret = ioctl(fd, SIOCGIFINDEX, &req);
+ if (ret < 0)
+ fprintf(stderr, "SIOCGIFINDEX failed\n");
+
+ memset(&lladdr, 0, sizeof(lladdr));
+ lladdr.sll_family = AF_PACKET;
+ lladdr.sll_protocol = htons(ETH_P_ALL);
+ lladdr.sll_ifindex = req.ifr_ifindex;
+ ret = bind(fd, (const struct sockaddr *)&lladdr, sizeof(lladdr));
+ if (ret < 0)
+ fprintf(stderr, "bind failed\n");
+
+ if (*vnet_hdr) {
+ val = 1;
+ ret=setsockopt(fd, SOL_PACKET, PACKET_VNET_HDR, (const char *)&val,
+ sizeof(val));
+ if (ret < 0) {
+ fprintf(stderr, "setsockopt(SOL_PACKET, PACKET_VNET_HDR) failed\n");
+ *vnet_hdr = 0;
+ } else {
+ *vnet_hdr = 1;
+ }
+
+ if (vnet_hdr_required && !*vnet_hdr) {
+ qemu_error("vnet_hdr=1 requested, but kernel "
+ "doesn't support PACKET_VNET_HDR");
+ close(fd);
+ return -1;
+ }
+ }
+
+ ret = fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
+ if (ret < 0)
+ fprintf(stderr, "O_NONBLOCK set failed\n");
+
+ return fd;
+}
+
+int raw_probe_vnet_hdr(int fd)
+{
+ int val, len;
+
+ len = sizeof(val);
+ if (getsockopt(fd, SOL_PACKET, PACKET_VNET_HDR, &val, (socklen_t *)&len) == 0)
+ return 1;
+
+ return 0;
+}
diff --git a/net/raw-linux.h b/net/raw-linux.h
new file mode 100644
index 0000000..ca463f4
--- /dev/null
+++ b/net/raw-linux.h
@@ -0,0 +1,42 @@
+/*
+ * 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_RAW_LINUX_H
+#define QEMU_RAW_LINUX_H
+
+#include <stdint.h>
+
+#define PACKET_VNET_HDR 15
+
+struct virtio_net_hdr
+{
+ uint8_t flags;
+ uint8_t gso_type;
+ uint16_t hdr_len;
+ uint16_t gso_size;
+ uint16_t csum_start;
+ uint16_t csum_offset;
+};
+
+#endif /* QEMU_RAW_LINUX_H */
diff --git a/net/raw.c b/net/raw.c
new file mode 100644
index 0000000..9dbc2f4
--- /dev/null
+++ b/net/raw.c
@@ -0,0 +1,362 @@
+/*
+ * 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/raw.h"
+
+#include "config-host.h"
+
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include <net/if.h>
+
+#include "net.h"
+#include "sysemu.h"
+#include "qemu-char.h"
+#include "qemu-common.h"
+
+#include "net/raw-linux.h"
+
+/* Maximum GSO packet size (64k) plus plenty of room for
+ * the ethernet and virtio_net headers
+ */
+#define RAW_BUFSIZE (4096 + 65536)
+
+typedef struct RAWState {
+ VLANClientState nc;
+ int fd;
+ uint8_t buf[RAW_BUFSIZE];
+ int promisc;
+ unsigned int read_poll:1;
+ unsigned int write_poll:1;
+ unsigned int has_vnet_hdr:1;
+ unsigned int using_vnet_hdr:1;
+ unsigned int has_ufo:1;
+} RAWState;
+
+static int raw_can_send(void *opaque);
+static void raw_send(void *opaque);
+static void raw_writable(void *opaque);
+
+static void raw_update_fd_handler(RAWState *s)
+{
+ qemu_set_fd_handler2(s->fd,
+ s->read_poll ? raw_can_send : NULL,
+ s->read_poll ? raw_send : NULL,
+ s->write_poll ? raw_writable : NULL,
+ s);
+}
+
+static void raw_read_poll(RAWState *s, int enable)
+{
+ s->read_poll = !!enable;
+ raw_update_fd_handler(s);
+}
+
+static void raw_write_poll(RAWState *s, int enable)
+{
+ s->write_poll = !!enable;
+ raw_update_fd_handler(s);
+}
+
+static void raw_writable(void *opaque)
+{
+ RAWState *s = opaque;
+
+ raw_write_poll(s, 0);
+ qemu_flush_queued_packets(&s->nc);
+}
+
+static ssize_t raw_write_packet(RAWState *s, const struct iovec *iov, int iovcnt)
+{
+ ssize_t len;
+
+ do {
+ len = writev(s->fd, iov, iovcnt);
+ } while (len == -1 && errno == EINTR);
+
+ if (len == -1 && errno == EAGAIN) {
+ raw_write_poll(s, 1);
+ return 0;
+ }
+
+ if (len == -1)
+ printf("raw_write_packet: errno:%d\n", errno);
+
+ return len;
+}
+
+static ssize_t raw_receive_iov(VLANClientState *nc, const struct iovec *iov,
+ int iovcnt)
+{
+ RAWState *s = DO_UPCAST(RAWState, nc, nc);
+ const struct iovec *iovp = iov;
+ struct iovec iov_copy[iovcnt + 1];
+ struct virtio_net_hdr hdr = { 0, };
+
+ if (s->has_vnet_hdr && !s->using_vnet_hdr) {
+ iov_copy[0].iov_base = &hdr;
+ iov_copy[0].iov_len = sizeof(hdr);
+ memcpy(&iov_copy[1], iov, iovcnt * sizeof(*iov));
+ iovp = iov_copy;
+ iovcnt++;
+ }
+
+ return raw_write_packet(s, iovp, iovcnt);
+}
+
+static ssize_t raw_receive_raw(VLANClientState *nc, const uint8_t *buf, size_t size)
+{
+ RAWState *s = DO_UPCAST(RAWState, nc, nc);
+ struct iovec iov[2];
+ int iovcnt = 0;
+ struct virtio_net_hdr hdr = { 0, };
+
+ if (s->has_vnet_hdr) {
+ iov[iovcnt].iov_base = &hdr;
+ iov[iovcnt].iov_len = sizeof(hdr);
+ iovcnt++;
+ }
+
+ iov[iovcnt].iov_base = (char *)buf;
+ iov[iovcnt].iov_len = size;
+ iovcnt++;
+
+ return raw_write_packet(s, iov, iovcnt);
+}
+
+static ssize_t raw_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
+{
+ RAWState *s = DO_UPCAST(RAWState, nc, nc);
+ struct iovec iov[1];
+
+ if (s->has_vnet_hdr && !s->using_vnet_hdr)
+ return raw_receive_raw(nc, buf, size);
+
+ iov[0].iov_base = (char *)buf;
+ iov[0].iov_len = size;
+
+ return raw_write_packet(s, iov, 1);
+}
+
+static int raw_can_send(void *opaque)
+{
+ RAWState *s = opaque;
+
+ return qemu_can_send_packet(&s->nc);
+}
+
+ssize_t raw_read_packet(int rawfd, uint8_t *buf, int maxlen, int flags)
+{
+ int ret;
+
+ ret = recv(rawfd, buf, maxlen, flags);
+ return ret;
+}
+
+static void raw_send_completed(VLANClientState *nc, ssize_t len)
+{
+ RAWState *s = DO_UPCAST(RAWState, nc, nc);
+
+ raw_read_poll(s, 1);
+}
+
+static void raw_send(void *opaque)
+{
+ RAWState *s = opaque;
+ int size;
+
+ do {
+ uint8_t *buf = s->buf;
+
+ size = raw_read_packet(s->fd, s->buf, sizeof(s->buf), MSG_TRUNC);
+ if (size <= 0)
+ break;
+
+ if (s->has_vnet_hdr && !s->using_vnet_hdr) {
+ buf += sizeof(struct virtio_net_hdr);
+ size -= sizeof(struct virtio_net_hdr);
+ }
+
+ size = qemu_send_packet_async(&s->nc, buf, size, raw_send_completed);
+ if (size == 0)
+ raw_read_poll(s, 0);
+
+ } while (size > 0 && qemu_can_send_packet(&s->nc));
+}
+
+int raw_has_ufo(VLANClientState *nc)
+{
+ RAWState *s = DO_UPCAST(RAWState, nc, nc);
+
+ assert(nc->info->type == NET_CLIENT_TYPE_RAW);
+
+ return s->has_ufo;
+}
+
+int raw_has_vnet_hdr(VLANClientState *nc)
+{
+ RAWState *s = DO_UPCAST(RAWState, nc, nc);
+
+ assert(nc->info->type == NET_CLIENT_TYPE_RAW);
+
+ return s->has_vnet_hdr;
+}
+
+void raw_using_vnet_hdr(VLANClientState *nc, int using_vnet_hdr)
+{
+ RAWState *s = DO_UPCAST(RAWState, nc, nc);
+
+ using_vnet_hdr = using_vnet_hdr != 0;
+
+ assert(nc->info->type == NET_CLIENT_TYPE_RAW);
+ assert(s->has_vnet_hdr == using_vnet_hdr);
+
+ s->using_vnet_hdr = using_vnet_hdr;
+}
+
+void raw_set_offload(VLANClientState *nc, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+ return;
+}
+
+static void raw_cleanup(VLANClientState *nc)
+{
+ RAWState *s = DO_UPCAST(RAWState, nc, nc);
+
+ qemu_purge_queued_packets(nc);
+
+ raw_read_poll(s, 0);
+ raw_write_poll(s, 0);
+ close(s->fd);
+}
+
+/* fd support */
+
+static NetClientInfo net_raw_info = {
+ .type = NET_CLIENT_TYPE_RAW,
+ .size = sizeof(RAWState),
+ .receive = raw_receive,
+ .receive_raw = NULL,
+ .receive_iov = raw_receive_iov,
+ .cleanup = raw_cleanup,
+};
+
+
+static RAWState *net_raw_fd_init(VLANState *vlan, const char *model,
+ const char *name, int fd, int vnet_hdr)
+{
+ VLANClientState *nc;
+ RAWState *s;
+
+ nc = qemu_new_net_client(&net_raw_info, vlan, NULL, model, name);
+
+ s = DO_UPCAST(RAWState, nc, nc);
+
+ s->fd = fd;
+ s->has_vnet_hdr = vnet_hdr != 0;
+ s->using_vnet_hdr = 0;
+ s->has_ufo = 1;
+ raw_read_poll(s, 1);
+
+ return s;
+}
+
+static int net_raw_init(QemuOpts *opts, int *vnet_hdr)
+{
+ int fd, vnet_hdr_required;
+ char ifname[128] = {0,};
+
+ if (qemu_opt_get(opts, "ifname")) {
+ pstrcpy(ifname, sizeof(ifname), qemu_opt_get(opts, "ifname"));
+ }
+
+ *vnet_hdr = qemu_opt_get_bool(opts, "vnet_hdr", 1);
+ if (qemu_opt_get(opts, "vnet_hdr")) {
+ vnet_hdr_required = *vnet_hdr;
+ } else {
+ vnet_hdr_required = 0;
+ }
+
+ TFR(fd = raw_open(ifname, sizeof(ifname), vnet_hdr, vnet_hdr_required));
+ if (fd < 0)
+ return -1;
+
+ qemu_opt_set(opts, "ifname", ifname);
+
+ return fd;
+}
+
+int net_init_raw(QemuOpts *opts, Monitor *mon, const char *name,
+ VLANState *vlan)
+{
+ RAWState *s;
+ int fd, vnet_hdr = 0;
+
+ if (qemu_opt_get(opts, "fd")) {
+ if (qemu_opt_get(opts, "ifname")) {
+ qemu_error("ifname=, is invalid with fd=\n");
+ return -1;
+ }
+
+ fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
+ if (fd == -1) {
+ return -1;
+ }
+
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+
+ vnet_hdr = raw_probe_vnet_hdr(fd);
+ } else {
+ fd = net_raw_init(opts, &vnet_hdr);
+ if (fd == -1) {
+ return -1;
+ }
+ }
+
+ s = net_raw_fd_init(vlan, "raw", name, fd, vnet_hdr);
+ if (!s) {
+ close(fd);
+ return -1;
+ }
+
+ if (qemu_opt_get(opts, "fd")) {
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd);
+ } else {
+ const char *ifname;
+
+ ifname = qemu_opt_get(opts, "ifname");
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str), "ifname=%s", ifname);
+
+ }
+
+ if (vlan) {
+ vlan->nb_host_devs++;
+ }
+
+ return 0;
+}
diff --git a/net/raw.h b/net/raw.h
new file mode 100644
index 0000000..7260080
--- /dev/null
+++ b/net/raw.h
@@ -0,0 +1,40 @@
+/*
+ * 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_RAW_H
+#define QEMU_NET_RAW_H
+
+#include "qemu-common.h"
+#include "qemu-option.h"
+
+int net_init_raw(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan);
+int raw_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required);
+ssize_t raw_read_packet(int rawfd, uint8_t *buf, int maxlen, int flags);
+int raw_has_ufo(VLANClientState *vc);
+int raw_has_vnet_hdr(VLANClientState *vc);
+void raw_using_vnet_hdr(VLANClientState *vc, int using_vnet_hdr);
+int raw_probe_vnet_hdr(int fd);
+void raw_set_offload(VLANClientState *vc, int csum, int tso4, int tso6, int ecn, int ufo);
+
+#endif /* QEMU_NET_RAW_H */