1 #ifndef QEMU_NET_H 2 #define QEMU_NET_H 3 4 #include "qemu/queue.h" 5 #include "qapi/qapi-types-net.h" 6 #include "net/queue.h" 7 #include "hw/qdev-properties-system.h" 8 9 #define MAC_FMT "%02X:%02X:%02X:%02X:%02X:%02X" 10 #define MAC_ARG(x) ((uint8_t *)(x))[0], ((uint8_t *)(x))[1], \ 11 ((uint8_t *)(x))[2], ((uint8_t *)(x))[3], \ 12 ((uint8_t *)(x))[4], ((uint8_t *)(x))[5] 13 14 #define MAX_QUEUE_NUM 1024 15 16 /* Maximum GSO packet size (64k) plus plenty of room for 17 * the ethernet and virtio_net headers 18 */ 19 #define NET_BUFSIZE (4096 + 65536) 20 21 struct MACAddr { 22 uint8_t a[6]; 23 }; 24 25 /* qdev nic properties */ 26 27 typedef struct NICPeers { 28 NetClientState *ncs[MAX_QUEUE_NUM]; 29 int32_t queues; 30 } NICPeers; 31 32 typedef struct NICConf { 33 MACAddr macaddr; 34 NICPeers peers; 35 int32_t bootindex; 36 } NICConf; 37 38 #define DEFINE_NIC_PROPERTIES(_state, _conf) \ 39 DEFINE_PROP_MACADDR("mac", _state, _conf.macaddr), \ 40 DEFINE_PROP_NETDEV("netdev", _state, _conf.peers) 41 42 43 /* Net clients */ 44 45 typedef void (NetPoll)(NetClientState *, bool enable); 46 typedef bool (NetCanReceive)(NetClientState *); 47 typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t); 48 typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int); 49 typedef void (NetCleanup) (NetClientState *); 50 typedef void (LinkStatusChanged)(NetClientState *); 51 typedef void (NetClientDestructor)(NetClientState *); 52 typedef RxFilterInfo *(QueryRxFilter)(NetClientState *); 53 typedef bool (HasUfo)(NetClientState *); 54 typedef bool (HasVnetHdr)(NetClientState *); 55 typedef bool (HasVnetHdrLen)(NetClientState *, int); 56 typedef void (UsingVnetHdr)(NetClientState *, bool); 57 typedef void (SetOffload)(NetClientState *, int, int, int, int, int); 58 typedef void (SetVnetHdrLen)(NetClientState *, int); 59 typedef int (SetVnetLE)(NetClientState *, bool); 60 typedef int (SetVnetBE)(NetClientState *, bool); 61 typedef struct SocketReadState SocketReadState; 62 typedef void (SocketReadStateFinalize)(SocketReadState *rs); 63 typedef void (NetAnnounce)(NetClientState *); 64 65 typedef struct NetClientInfo { 66 NetClientDriver type; 67 size_t size; 68 NetReceive *receive; 69 NetReceive *receive_raw; 70 NetReceiveIOV *receive_iov; 71 NetCanReceive *can_receive; 72 NetCleanup *cleanup; 73 LinkStatusChanged *link_status_changed; 74 QueryRxFilter *query_rx_filter; 75 NetPoll *poll; 76 HasUfo *has_ufo; 77 HasVnetHdr *has_vnet_hdr; 78 HasVnetHdrLen *has_vnet_hdr_len; 79 UsingVnetHdr *using_vnet_hdr; 80 SetOffload *set_offload; 81 SetVnetHdrLen *set_vnet_hdr_len; 82 SetVnetLE *set_vnet_le; 83 SetVnetBE *set_vnet_be; 84 NetAnnounce *announce; 85 } NetClientInfo; 86 87 struct NetClientState { 88 NetClientInfo *info; 89 int link_down; 90 QTAILQ_ENTRY(NetClientState) next; 91 NetClientState *peer; 92 NetQueue *incoming_queue; 93 char *model; 94 char *name; 95 char info_str[256]; 96 unsigned receive_disabled : 1; 97 NetClientDestructor *destructor; 98 unsigned int queue_index; 99 unsigned rxfilter_notify_enabled:1; 100 int vring_enable; 101 int vnet_hdr_len; 102 bool is_netdev; 103 bool do_not_pad; /* do not pad to the minimum ethernet frame length */ 104 QTAILQ_HEAD(, NetFilterState) filters; 105 }; 106 107 typedef struct NICState { 108 NetClientState *ncs; 109 NICConf *conf; 110 void *opaque; 111 bool peer_deleted; 112 } NICState; 113 114 struct SocketReadState { 115 /* 0 = getting length, 1 = getting vnet header length, 2 = getting data */ 116 int state; 117 /* This flag decide whether to read the vnet_hdr_len field */ 118 bool vnet_hdr; 119 uint32_t index; 120 uint32_t packet_len; 121 uint32_t vnet_hdr_len; 122 uint8_t buf[NET_BUFSIZE]; 123 SocketReadStateFinalize *finalize; 124 }; 125 126 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size); 127 char *qemu_mac_strdup_printf(const uint8_t *macaddr); 128 NetClientState *qemu_find_netdev(const char *id); 129 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 130 NetClientDriver type, int max); 131 NetClientState *qemu_new_net_client(NetClientInfo *info, 132 NetClientState *peer, 133 const char *model, 134 const char *name); 135 NICState *qemu_new_nic(NetClientInfo *info, 136 NICConf *conf, 137 const char *model, 138 const char *name, 139 void *opaque); 140 void qemu_del_nic(NICState *nic); 141 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index); 142 NetClientState *qemu_get_queue(NICState *nic); 143 NICState *qemu_get_nic(NetClientState *nc); 144 void *qemu_get_nic_opaque(NetClientState *nc); 145 void qemu_del_net_client(NetClientState *nc); 146 typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque); 147 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque); 148 int qemu_can_receive_packet(NetClientState *nc); 149 int qemu_can_send_packet(NetClientState *nc); 150 ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, 151 int iovcnt); 152 ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov, 153 int iovcnt, NetPacketSent *sent_cb); 154 ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size); 155 ssize_t qemu_receive_packet(NetClientState *nc, const uint8_t *buf, int size); 156 ssize_t qemu_receive_packet_iov(NetClientState *nc, 157 const struct iovec *iov, 158 int iovcnt); 159 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size); 160 ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf, 161 int size, NetPacketSent *sent_cb); 162 void qemu_purge_queued_packets(NetClientState *nc); 163 void qemu_flush_queued_packets(NetClientState *nc); 164 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge); 165 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]); 166 bool qemu_has_ufo(NetClientState *nc); 167 bool qemu_has_vnet_hdr(NetClientState *nc); 168 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len); 169 void qemu_using_vnet_hdr(NetClientState *nc, bool enable); 170 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 171 int ecn, int ufo); 172 void qemu_set_vnet_hdr_len(NetClientState *nc, int len); 173 int qemu_set_vnet_le(NetClientState *nc, bool is_le); 174 int qemu_set_vnet_be(NetClientState *nc, bool is_be); 175 void qemu_macaddr_default_if_unset(MACAddr *macaddr); 176 int qemu_show_nic_models(const char *arg, const char *const *models); 177 void qemu_check_nic_model(NICInfo *nd, const char *model); 178 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 179 const char *default_model); 180 181 void print_net_client(Monitor *mon, NetClientState *nc); 182 void hmp_info_network(Monitor *mon, const QDict *qdict); 183 void net_socket_rs_init(SocketReadState *rs, 184 SocketReadStateFinalize *finalize, 185 bool vnet_hdr); 186 NetClientState *qemu_get_peer(NetClientState *nc, int queue_index); 187 188 /* NIC info */ 189 190 #define MAX_NICS 8 191 192 struct NICInfo { 193 MACAddr macaddr; 194 char *model; 195 char *name; 196 char *devaddr; 197 NetClientState *netdev; 198 int used; /* is this slot in nd_table[] being used? */ 199 int instantiated; /* does this NICInfo correspond to an instantiated NIC? */ 200 int nvectors; 201 }; 202 203 extern int nb_nics; 204 extern NICInfo nd_table[MAX_NICS]; 205 extern const char *host_net_devices[]; 206 207 /* from net.c */ 208 int net_client_parse(QemuOptsList *opts_list, const char *str); 209 void show_netdevs(void); 210 int net_init_clients(Error **errp); 211 void net_check_clients(void); 212 void net_cleanup(void); 213 void hmp_host_net_add(Monitor *mon, const QDict *qdict); 214 void hmp_host_net_remove(Monitor *mon, const QDict *qdict); 215 void netdev_add(QemuOpts *opts, Error **errp); 216 217 int net_hub_id_for_client(NetClientState *nc, int *id); 218 NetClientState *net_hub_port_find(int hub_id); 219 220 #define DEFAULT_NETWORK_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifup" 221 #define DEFAULT_NETWORK_DOWN_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifdown" 222 #define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper" 223 #define DEFAULT_BRIDGE_INTERFACE "br0" 224 225 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd); 226 227 #define POLYNOMIAL_BE 0x04c11db6 228 #define POLYNOMIAL_LE 0xedb88320 229 uint32_t net_crc32(const uint8_t *p, int len); 230 uint32_t net_crc32_le(const uint8_t *p, int len); 231 232 #define vmstate_offset_macaddr(_state, _field) \ 233 vmstate_offset_array(_state, _field.a, uint8_t, \ 234 sizeof(typeof_field(_state, _field))) 235 236 #define VMSTATE_MACADDR(_field, _state) { \ 237 .name = (stringify(_field)), \ 238 .size = sizeof(MACAddr), \ 239 .info = &vmstate_info_buffer, \ 240 .flags = VMS_BUFFER, \ 241 .offset = vmstate_offset_macaddr(_state, _field), \ 242 } 243 244 static inline bool net_peer_needs_padding(NetClientState *nc) 245 { 246 return nc->peer && !nc->peer->do_not_pad; 247 } 248 249 #endif 250