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- 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 */
- int prom; /* promiscuous mode */
- int scan; /* base station scanning interval */
- int bridge; /* bridge mode */
- int 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;
- /* about net */
- int limit; /* flow control */
- int alen; /* address length */
- int mbps; /* megabits per sec */
- 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;
- int inpackets;
- int 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 */
- };
- struct Etherpkt
- {
- uchar d[Eaddrlen];
- uchar s[Eaddrlen];
- uchar type[2];
- uchar data[1500];
- };
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