net: reorganize headers

Move public headers to include/net, and leave private headers in net/.
Put the virtio headers in include/net/tap.h, removing the multiple copies
that existed.  Leave include/net/tap.h as the interface for NICs, and
net/tap_int.h as the interface for OS-specific parts of the tap backend.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

5 files changed, 376 insertions, 0 deletions

diff --git a/include/net/checksum.h b/include/net/checksum.h
new file mode 100644
index 0000000..1f05298
--- /dev/null
+++ b/include/net/checksum.h
@@ -0,0 +1,29 @@
+/*
+ *  IP checksumming functions.
+ *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; under version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef QEMU_NET_CHECKSUM_H
+#define QEMU_NET_CHECKSUM_H
+
+#include <stdint.h>
+
+uint32_t net_checksum_add(int len, uint8_t *buf);
+uint16_t net_checksum_finish(uint32_t sum);
+uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto,
+                             uint8_t *addrs, uint8_t *buf);
+void net_checksum_calculate(uint8_t *data, int length);
+
+#endif /* QEMU_NET_CHECKSUM_H */
diff --git a/include/net/net.h b/include/net/net.h
new file mode 100644
index 0000000..9ff9305
--- /dev/null
+++ b/include/net/net.h
@@ -0,0 +1,175 @@
+#ifndef QEMU_NET_H
+#define QEMU_NET_H
+
+#include "qemu-queue.h"
+#include "qemu-common.h"
+#include "qdict.h"
+#include "qemu-option.h"
+#include "net/queue.h"
+#include "vmstate.h"
+#include "qapi-types.h"
+
+struct MACAddr {
+    uint8_t a[6];
+};
+
+/* qdev nic properties */
+
+typedef struct NICConf {
+    MACAddr macaddr;
+    NetClientState *peer;
+    int32_t bootindex;
+} NICConf;
+
+#define DEFINE_NIC_PROPERTIES(_state, _conf)                            \
+    DEFINE_PROP_MACADDR("mac",   _state, _conf.macaddr),                \
+    DEFINE_PROP_VLAN("vlan",     _state, _conf.peer),                   \
+    DEFINE_PROP_NETDEV("netdev", _state, _conf.peer),                   \
+    DEFINE_PROP_INT32("bootindex", _state, _conf.bootindex, -1)
+
+/* Net clients */
+
+typedef void (NetPoll)(NetClientState *, bool enable);
+typedef int (NetCanReceive)(NetClientState *);
+typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
+typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
+typedef void (NetCleanup) (NetClientState *);
+typedef void (LinkStatusChanged)(NetClientState *);
+
+typedef struct NetClientInfo {
+    NetClientOptionsKind type;
+    size_t size;
+    NetReceive *receive;
+    NetReceive *receive_raw;
+    NetReceiveIOV *receive_iov;
+    NetCanReceive *can_receive;
+    NetCleanup *cleanup;
+    LinkStatusChanged *link_status_changed;
+    NetPoll *poll;
+} NetClientInfo;
+
+struct NetClientState {
+    NetClientInfo *info;
+    int link_down;
+    QTAILQ_ENTRY(NetClientState) next;
+    NetClientState *peer;
+    NetQueue *send_queue;
+    char *model;
+    char *name;
+    char info_str[256];
+    unsigned receive_disabled : 1;
+};
+
+typedef struct NICState {
+    NetClientState nc;
+    NICConf *conf;
+    void *opaque;
+    bool peer_deleted;
+} NICState;
+
+NetClientState *qemu_find_netdev(const char *id);
+NetClientState *qemu_new_net_client(NetClientInfo *info,
+                                    NetClientState *peer,
+                                    const char *model,
+                                    const char *name);
+NICState *qemu_new_nic(NetClientInfo *info,
+                       NICConf *conf,
+                       const char *model,
+                       const char *name,
+                       void *opaque);
+void qemu_del_net_client(NetClientState *nc);
+NetClientState *qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
+                                              const char *client_str);
+typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
+void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
+int qemu_can_send_packet(NetClientState *nc);
+ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov,
+                          int iovcnt);
+ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov,
+                                int iovcnt, NetPacketSent *sent_cb);
+void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size);
+ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size);
+ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf,
+                               int size, NetPacketSent *sent_cb);
+void qemu_purge_queued_packets(NetClientState *nc);
+void qemu_flush_queued_packets(NetClientState *nc);
+void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]);
+void qemu_macaddr_default_if_unset(MACAddr *macaddr);
+int qemu_show_nic_models(const char *arg, const char *const *models);
+void qemu_check_nic_model(NICInfo *nd, const char *model);
+int qemu_find_nic_model(NICInfo *nd, const char * const *models,
+                        const char *default_model);
+
+ssize_t qemu_deliver_packet(NetClientState *sender,
+                            unsigned flags,
+                            const uint8_t *data,
+                            size_t size,
+                            void *opaque);
+ssize_t qemu_deliver_packet_iov(NetClientState *sender,
+                            unsigned flags,
+                            const struct iovec *iov,
+                            int iovcnt,
+                            void *opaque);
+
+void print_net_client(Monitor *mon, NetClientState *nc);
+void do_info_network(Monitor *mon);
+
+/* NIC info */
+
+#define MAX_NICS 8
+
+struct NICInfo {
+    MACAddr macaddr;
+    char *model;
+    char *name;
+    char *devaddr;
+    NetClientState *netdev;
+    int used;         /* is this slot in nd_table[] being used? */
+    int instantiated; /* does this NICInfo correspond to an instantiated NIC? */
+    int nvectors;
+};
+
+extern int nb_nics;
+extern NICInfo nd_table[MAX_NICS];
+extern int default_net;
+
+/* from net.c */
+extern const char *legacy_tftp_prefix;
+extern const char *legacy_bootp_filename;
+
+int net_client_init(QemuOpts *opts, int is_netdev, Error **errp);
+int net_client_parse(QemuOptsList *opts_list, const char *str);
+int net_init_clients(void);
+void net_check_clients(void);
+void net_cleanup(void);
+void net_host_device_add(Monitor *mon, const QDict *qdict);
+void net_host_device_remove(Monitor *mon, const QDict *qdict);
+void netdev_add(QemuOpts *opts, Error **errp);
+int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret);
+
+int net_hub_id_for_client(NetClientState *nc, int *id);
+NetClientState *net_hub_port_find(int hub_id);
+
+#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
+#define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
+#define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
+#define DEFAULT_BRIDGE_INTERFACE "br0"
+
+void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
+
+#define POLYNOMIAL 0x04c11db6
+unsigned compute_mcast_idx(const uint8_t *ep);
+
+#define vmstate_offset_macaddr(_state, _field)                       \
+    vmstate_offset_array(_state, _field.a, uint8_t,                \
+                         sizeof(typeof_field(_state, _field)))
+
+#define VMSTATE_MACADDR(_field, _state) {                            \
+    .name       = (stringify(_field)),                               \
+    .size       = sizeof(MACAddr),                                   \
+    .info       = &vmstate_info_buffer,                              \
+    .flags      = VMS_BUFFER,                                        \
+    .offset     = vmstate_offset_macaddr(_state, _field),            \
+}
+
+#endif
diff --git a/include/net/queue.h b/include/net/queue.h
new file mode 100644
index 0000000..fc02b33
--- /dev/null
+++ b/include/net/queue.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2009 Red Hat, Inc.
+ *
+ * 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_QUEUE_H
+#define QEMU_NET_QUEUE_H
+
+#include "qemu-common.h"
+
+typedef struct NetPacket NetPacket;
+typedef struct NetQueue NetQueue;
+
+typedef void (NetPacketSent) (NetClientState *sender, ssize_t ret);
+
+#define QEMU_NET_PACKET_FLAG_NONE  0
+#define QEMU_NET_PACKET_FLAG_RAW  (1<<0)
+
+NetQueue *qemu_new_net_queue(void *opaque);
+
+void qemu_del_net_queue(NetQueue *queue);
+
+ssize_t qemu_net_queue_send(NetQueue *queue,
+                            NetClientState *sender,
+                            unsigned flags,
+                            const uint8_t *data,
+                            size_t size,
+                            NetPacketSent *sent_cb);
+
+ssize_t qemu_net_queue_send_iov(NetQueue *queue,
+                                NetClientState *sender,
+                                unsigned flags,
+                                const struct iovec *iov,
+                                int iovcnt,
+                                NetPacketSent *sent_cb);
+
+void qemu_net_queue_purge(NetQueue *queue, NetClientState *from);
+bool qemu_net_queue_flush(NetQueue *queue);
+
+#endif /* QEMU_NET_QUEUE_H */
diff --git a/include/net/slirp.h b/include/net/slirp.h
new file mode 100644
index 0000000..2ca09b6
--- /dev/null
+++ b/include/net/slirp.h
@@ -0,0 +1,47 @@
+/*
+ * 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_SLIRP_H
+#define QEMU_NET_SLIRP_H
+
+#include "qemu-common.h"
+#include "qdict.h"
+#include "qemu-option.h"
+#include "qapi-types.h"
+
+#ifdef CONFIG_SLIRP
+
+void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict);
+void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict);
+
+int net_slirp_redir(const char *redir_str);
+
+int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret);
+
+int net_slirp_smb(const char *exported_dir);
+
+void do_info_usernet(Monitor *mon);
+
+#endif
+
+#endif /* QEMU_NET_SLIRP_H */
diff --git a/include/net/tap.h b/include/net/tap.h
new file mode 100644
index 0000000..bb7efb5
--- /dev/null
+++ b/include/net/tap.h
@@ -0,0 +1,67 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2009 Red Hat, Inc.
+ *
+ * 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_TAP_H
+#define QEMU_NET_TAP_H
+
+#include "qemu-common.h"
+#include "qapi-types.h"
+
+int tap_has_ufo(NetClientState *nc);
+int tap_has_vnet_hdr(NetClientState *nc);
+int tap_has_vnet_hdr_len(NetClientState *nc, int len);
+void tap_using_vnet_hdr(NetClientState *nc, int using_vnet_hdr);
+void tap_set_offload(NetClientState *nc, int csum, int tso4, int tso6, int ecn, int ufo);
+void tap_set_vnet_hdr_len(NetClientState *nc, int len);
+
+int tap_get_fd(NetClientState *nc);
+
+struct vhost_net;
+struct vhost_net *tap_get_vhost_net(NetClientState *nc);
+
+struct virtio_net_hdr
+{
+#define VIRTIO_NET_HDR_F_NEEDS_CSUM     1       // Use csum_start, csum_offset
+#define VIRTIO_NET_HDR_F_DATA_VALID    2       // Csum is valid
+    uint8_t flags;
+#define VIRTIO_NET_HDR_GSO_NONE         0       // Not a GSO frame
+#define VIRTIO_NET_HDR_GSO_TCPV4        1       // GSO frame, IPv4 TCP (TSO)
+#define VIRTIO_NET_HDR_GSO_UDP          3       // GSO frame, IPv4 UDP (UFO)
+#define VIRTIO_NET_HDR_GSO_TCPV6        4       // GSO frame, IPv6 TCP
+#define VIRTIO_NET_HDR_GSO_ECN          0x80    // TCP has ECN set
+    uint8_t gso_type;
+    uint16_t hdr_len;
+    uint16_t gso_size;
+    uint16_t csum_start;
+    uint16_t csum_offset;
+};
+
+struct virtio_net_hdr_mrg_rxbuf
+{
+    struct virtio_net_hdr hdr;
+    uint16_t num_buffers;   /* Number of merged rx buffers */
+};
+
+#endif /* QEMU_NET_TAP_H */