1 typedef struct Etherpkt Etherpkt; 2 typedef struct Netaddr Netaddr; 3 typedef struct Netfile Netfile; 4 typedef struct Netif Netif; 5 6 enum 7 { 8 Nmaxaddr= 64, 9 Nmhash= 31, 10 11 Ncloneqid= 1, 12 Naddrqid, 13 N2ndqid, 14 N3rdqid, 15 Ndataqid, 16 Nctlqid, 17 Nstatqid, 18 Ntypeqid, 19 Nifstatqid, 20 }; 21 22 /* 23 * Macros to manage Qid's used for multiplexed devices 24 */ 25 #define NETTYPE(x) (((ulong)x)&0x1f) 26 #define NETID(x) ((((ulong)x))>>5) 27 #define NETQID(i,t) ((((ulong)i)<<5)|(t)) 28 29 /* 30 * one per multiplexed connection 31 */ 32 struct Netfile 33 { 34 QLock; 35 36 int inuse; 37 ulong mode; 38 char owner[KNAMELEN]; 39 40 int type; /* multiplexor type */ 41 int prom; /* promiscuous mode */ 42 int scan; /* base station scanning interval */ 43 int bridge; /* bridge mode */ 44 int headersonly; /* headers only - no data */ 45 uchar maddr[8]; /* bitmask of multicast addresses requested */ 46 int nmaddr; /* number of multicast addresses */ 47 48 Queue *in; /* input buffer */ 49 }; 50 51 /* 52 * a network address 53 */ 54 struct Netaddr 55 { 56 Netaddr *next; /* allocation chain */ 57 Netaddr *hnext; 58 uchar addr[Nmaxaddr]; 59 int ref; 60 }; 61 62 /* 63 * a network interface 64 */ 65 struct Netif 66 { 67 QLock; 68 69 /* multiplexing */ 70 char name[KNAMELEN]; /* for top level directory */ 71 int nfile; /* max number of Netfiles */ 72 Netfile **f; 73 74 /* about net */ 75 int limit; /* flow control */ 76 int alen; /* address length */ 77 int mbps; /* megabits per sec */ 78 int link; /* link status */ 79 uchar addr[Nmaxaddr]; 80 uchar bcast[Nmaxaddr]; 81 Netaddr *maddr; /* known multicast addresses */ 82 int nmaddr; /* number of known multicast addresses */ 83 Netaddr *mhash[Nmhash]; /* hash table of multicast addresses */ 84 int prom; /* number of promiscuous opens */ 85 int scan; /* number of base station scanners */ 86 int all; /* number of -1 multiplexors */ 87 88 /* statistics */ 89 int misses; 90 int inpackets; 91 int outpackets; 92 int crcs; /* input crc errors */ 93 int oerrs; /* output errors */ 94 int frames; /* framing errors */ 95 int overflows; /* packet overflows */ 96 int buffs; /* buffering errors */ 97 int soverflows; /* software overflow */ 98 99 /* routines for touching the hardware */ 100 void *arg; 101 void (*promiscuous)(void*, int); 102 void (*multicast)(void*, uchar*, int); 103 void (*scanbs)(void*, uint); /* scan for base stations */ 104 }; 105 106 void netifinit(Netif*, char*, int, ulong); 107 Walkqid* netifwalk(Netif*, Chan*, Chan*, char **, int); 108 Chan* netifopen(Netif*, Chan*, int); 109 void netifclose(Netif*, Chan*); 110 long netifread(Netif*, Chan*, void*, long, ulong); 111 Block* netifbread(Netif*, Chan*, long, ulong); 112 long netifwrite(Netif*, Chan*, void*, long); 113 int netifwstat(Netif*, Chan*, uchar*, int); 114 int netifstat(Netif*, Chan*, uchar*, int); 115 int activemulti(Netif*, uchar*, int); 116 117 /* 118 * Ethernet specific 119 */ 120 enum 121 { 122 Eaddrlen= 6, 123 ETHERMINTU = 60, /* minimum transmit size */ 124 ETHERMAXTU = 1514, /* maximum transmit size */ 125 ETHERHDRSIZE = 14, /* size of an ethernet header */ 126 }; 127 128 struct Etherpkt 129 { 130 uchar d[Eaddrlen]; 131 uchar s[Eaddrlen]; 132 uchar type[2]; 133 uchar data[1500]; 134 }; 135