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