ref: 38ea1ac105f4484f02bba3bfbc790ebe4f18f016
dir: /sys/src/9/port/netif.h/
typedef struct Etherpkt Etherpkt; typedef struct Netaddr Netaddr; typedef struct Netfile Netfile; typedef struct Netif Netif; enum { Nmaxaddr= 64, Nmhash= 31, Ncloneqid= 1, Naddrqid, N2ndqid, N3rdqid, Ndataqid, Nctlqid, Nstatqid, Ntypeqid, Nifstatqid, }; /* * Macros to manage Qid's used for multiplexed devices */ #define NETTYPE(x) (((ulong)x)&0x1f) #define NETID(x) ((((ulong)x))>>5) #define NETQID(i,t) ((((ulong)i)<<5)|(t)) /* * one per multiplexed connection */ struct Netfile { QLock; int inuse; ulong mode; char owner[KNAMELEN]; int type; /* multiplexor type */ char prom; /* promiscuous mode */ char scan; /* base station scanning interval */ char bridge; /* bridge mode */ char bypass; /* bypass transmission */ char headersonly; /* headers only - no data */ uchar maddr[8]; /* bitmask of multicast addresses requested */ int nmaddr; /* number of multicast addresses */ Queue *in; /* input buffer */ }; /* * a network address */ struct Netaddr { Netaddr *next; /* allocation chain */ Netaddr *hnext; uchar addr[Nmaxaddr]; int ref; }; /* * a network interface */ struct Netif { QLock; /* multiplexing */ char name[KNAMELEN]; /* for top level directory */ int nfile; /* max number of Netfiles */ Netfile **f; Netfile *bypass; /* about net */ int limit; /* flow control */ int alen; /* address length */ int mbps; /* megabits per sec */ int link; /* link status */ uchar addr[Nmaxaddr]; uchar bcast[Nmaxaddr]; Netaddr *maddr; /* known multicast addresses */ int nmaddr; /* number of known multicast addresses */ Netaddr *mhash[Nmhash]; /* hash table of multicast addresses */ int prom; /* number of promiscuous opens */ int scan; /* number of base station scanners */ int all; /* number of -1 multiplexors */ /* statistics */ int misses; uvlong inpackets; uvlong outpackets; int crcs; /* input crc errors */ int oerrs; /* output errors */ int frames; /* framing errors */ int overflows; /* packet overflows */ int buffs; /* buffering errors */ int soverflows; /* software overflow */ /* routines for touching the hardware */ void *arg; void (*promiscuous)(void*, int); void (*multicast)(void*, uchar*, int); void (*scanbs)(void*, uint); /* scan for base stations */ }; void netifinit(Netif*, char*, int, ulong); Walkqid* netifwalk(Netif*, Chan*, Chan*, char **, int); Chan* netifopen(Netif*, Chan*, int); void netifclose(Netif*, Chan*); long netifread(Netif*, Chan*, void*, long, ulong); Block* netifbread(Netif*, Chan*, long, ulong); long netifwrite(Netif*, Chan*, void*, long); int netifwstat(Netif*, Chan*, uchar*, int); int netifstat(Netif*, Chan*, uchar*, int); int activemulti(Netif*, uchar*, int); /* * Ethernet specific */ enum { Eaddrlen= 6, ETHERMINTU = 60, /* minimum transmit size */ ETHERMAXTU = 1514, /* maximum transmit size */ ETHERHDRSIZE = 14, /* size of an ethernet header */ /* ethernet packet types */ ETARP = 0x0806, ETIP4 = 0x0800, ETIP6 = 0x86DD, }; struct Etherpkt { uchar d[Eaddrlen]; uchar s[Eaddrlen]; uchar type[2]; uchar data[1500]; };