net.h

   1 #ifndef QEMU_NET_H
   2 #define QEMU_NET_H
   3
   4 #include <sys/uio.h>
   5
   6 /* VLANs support */
   7
   8 typedef ssize_t (IOReadvHandler)(void *, const struct iovec *, int);
   9
  10 typedef struct VLANClientState VLANClientState;
  11
  12 typedef void (SetOffload)(VLANClientState *, int, int, int, int);
  13
  14 struct VLANClientState {
  15     IOReadHandler *fd_read;
  16     IOReadvHandler *fd_readv;
  17     /* Packets may still be sent if this returns zero.  It's used to
  18        rate-limit the slirp code.  */
  19     IOCanRWHandler *fd_can_read;
  20     SetOffload *set_offload;
  21     void *opaque;
  22     struct VLANClientState *next;
  23     struct VLANState *vlan;
  24     char info_str[256];
  25 };
  26
  27 struct VLANState {
  28     int id;
  29     VLANClientState *first_client;
  30     struct VLANState *next;
  31     unsigned int nb_guest_devs, nb_host_devs;
  32 };
  33
  34 VLANState *qemu_find_vlan(int id);
  35 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
  36                                       IOReadHandler *fd_read,
  37                                       IOCanRWHandler *fd_can_read,
  38                                       void *opaque);
  39 void qemu_del_vlan_client(VLANClientState *vc);
  40 int qemu_can_send_packet(VLANClientState *vc);
  41 int qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size);
  42 ssize_t qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov,
  43                           int iovcnt);
  44 void qemu_handler_true(void *opaque);
  45
  46 void do_info_network(void);
  47
  48 int tap_has_vnet_hdr(void *opaque);
  49 void tap_using_vnet_hdr(void *opaque, int using_vnet_hdr);
  50
  51 int net_client_init(const char *device, const char *opts);
  52 void net_client_uninit(NICInfo *nd);
  53
  54 /* NIC info */
  55
  56 #define MAX_NICS 8
  57
  58 struct NICInfo {
  59     uint8_t macaddr[6];
  60     const char *model;
  61     VLANState *vlan;
  62     int devfn;
  63     int used;
  64 };
  65
  66 extern int nb_nics;
  67 extern NICInfo nd_table[MAX_NICS];
  68
  69 /* checksumming functions (net-checksum.c) */
  70 uint32_t net_checksum_add(int len, uint8_t *buf);
  71 uint16_t net_checksum_finish(uint32_t sum);
  72 uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto,
  73                              uint8_t *addrs, uint8_t *buf);
  74 void net_checksum_calculate(uint8_t *data, int length);
  75
  76 #endif