BBN-Vax-TCP/bbnnet-oct82/net.h
#define NCON 20 /* maximum number of connections */
#define NHOST 20 /* maximum number of foreign hosts */
#define NGATE 20 /* maximum size of gateway table */
#define NWORK 20 /* # of work entries in table */
#define TRUE 1
#define FALSE 0
#ifndef HZ
#define HZ 60
#endif
/*
* The following macros define how shorts and longs are modified when
* they are sent out on the net or received from the net as part of a
* header. In the case of the VAX, the bytes must be swapped. On the c70,
* a 2 bit "hole" must be inserted in the top bits of each byte before
* being sent out, or squeezed out when received.
*/
#ifndef mbb
#define short_to_net(x) ntohs(x)
#define short_from_net(x) ntohs(x)
#define long_to_net(x) ntohl(x)
#define long_from_net(x) ntohl(x)
#else
#define short_to_net(x) ((((x)<<2) & ((unsigned)0776000)) | ((x) & 0377))
#define short_from_net(x) ((((x)>>2) & ((unsigned)0177400)) | ((x) & 0377))
#define long_to_net(x) long_1822(x)
#define long_from_net(x) long_mbb(x)
typedef unsigned int holey_int;
typedef long holey_long;
typedef long u_long;
typedef char u_char;
#endif mbb
typedef unsigned short n_short; /* short as received from the net */
typedef u_long n_long; /* long as received from the net */
typedef u_long sequence; /* sequence numbers in tcp */
typedef u_long net_t; /* network number */
struct work { /* worklist entry */
short w_type; /* what to do with entry */
short w_stype; /* subtype for timer names */
struct tcb *w_tcb; /* -> tcb for entry */
char *w_dat; /* -> work data chain */
struct work *w_next; /* -> next work entry */
};
struct socket { /* all purpose internet address */
/* (can be extended for any network) */
union {
struct {
u_char s_b1;
u_char s_b2;
u_char s_b3;
u_char s_b4;
}S_un_b;
struct {
u_short s_w1;
u_short s_w2;
}S_un_w;
#ifndef mbb
struct {
long
s_la:24,
s_lb:8;
}S_un_lab;
#endif
u_long s_l;
} S_un;
#define s_addr S_un.s_l /* can be used for most tcp & ip code */
/* net specific fields */
#define s_neta S_un.S_un_b.s_b1 /* network (class a) */
#define s_netb S_un.S_un_w.s_w1 /* network (class b) */
#ifndef mbb
#define s_netc S_un.S_un_lab.s_la /* network (class c) */
#define netc(x) (x).s_netc
#else
#define netc(x) ((((x).s_l)&0xfffffffc00) >> 10)
#endif
/* ARPANET */
#define s_host S_un.S_un_b.s_b2 /* host on imp */
#define s_imp S_un.S_un_w.s_w2 /* imp field */
#define s_impno S_un.S_un_b.s_b4 /* imp number */
#define s_lh S_un.S_un_b.s_b3 /* logical host */
/* V2LNI */
#define s_vhst S_un.S_un_b.s_b4 /* ring address */
};
/* ip addr to net representation */
#define iptonet(x) (net_t)(!((x).s_neta&0x80) ? (x).s_neta \
: (!((x).s_neta&0x40) ? (x).s_netb \
: (!((x).s_neta&0x20) ? netc(x) \
: -1)))
/* net representation to right justified long integer */
#define netoint(x) (long)(x)
/* make an ip addr */
#ifndef mbb
#define ipaddr(w,x,y,z) ((long)(((z)<<24)|((y)<<16)|((x)<<8)|(w)))
#else
#define ipaddr(w,x,y,z) ((long)(((long)(w)<<30)|((long)(x)<<20) \
|((long)(y)<<10)|(long)(z)))
#endif
struct host { /* host table entry */
struct socket h_addr; /* internet address */
u_char h_rfnm; /* # outstanding rfnm's */
u_char h_refct; /* reference count */
u_short h_stat; /* host status */
struct mbuf *h_outq; /* -> host msg holding queue */
};
#define HUP 128 /* host up */
#define HTEMP 64 /* temp host entry (goes away if h_rfnm==0) */
struct net { /* network buffer allocation control */
struct proc *n_proc; /* -> network process */
struct inode *n_debug; /* -> inode of debugging file */
struct ucb *n_ucb_hd; /* -> top of ucbs */
struct ifcb *n_ifcb_hd; /* -> top of ifcbs */
struct ipq *n_ip_head; /* -> top of ip reass. queue */
struct ipq *n_ip_tail; /* -> end of ip reass. queue */
struct proto *n_ip_proto; /* -> ip raw proto chain */
struct tcb *n_tcb_head; /* -> top of tcp tcb list */
struct tcb *n_tcb_tail; /* -> end of tcp tcb list */
struct proto *n_tcp_proto; /* -> tcp raw proto chain */
struct proto *n_udp_proto; /* -> udp raw proto chain */
struct proto *n_icmp_proto; /* -> icmp raw proto chain */
struct proto *n_ggp_proto; /* -> ggp raw proto chain */
struct work *n_work; /* -> top of tcp work queue */
sequence n_iss; /* tcp initial send seq # */
short n_free; /* index of top of page free list */
#define netlow n_free /* page # of lowest mem used by net (mbb) */
short n_pages; /* # pages owned by network */
short n_bufs; /* # free msg buffers remaining */
short n_hiwat; /* max. # free mbufs allocated */
short n_lowat; /* min. # free mbufs allocated */
u_short n_ip_cnt; /* ip packet counter, used for ids */
short n_logct; /* logging queue size */
short n_loglim; /* logging queue limit */
struct mbuf *n_log_hd; /* logging queue head */
struct mbuf *n_log_tl; /* logging queue tail */
short n_ip_lock; /* ip reass. queue lock */
};
struct net_stat { /* interesting statistics */
int m_drops; /* #mbuf drops from lack of bufs */
int net_drops; /* local net msgs no one wants */
int ip_badsum; /* #bad ip checksums */
int ip_drops; /* #ip packets not addressed to us */
int t_badsum; /* #bad tcp checksums */
int t_badsegs; /* #bad tcp segments */
int t_unack; /* #tcp segs placed on rcv_unack */
int ic_drops; /* #bad icmp messages */
int ic_badsum; /* #bad icmp checksums */
int ic_quenches; /* #icmp source quenches */
int ic_redirects; /* #icmp redirects */
int ic_echoes; /* #icmp echoes */
int ic_timex; /* #icmp time exceeded messages */
int u_badsum; /* #udp bad checksums */
int u_drops; /* #udb drops */
};
struct buf_stat { /* buffer usage statistics */
int b_cons; /* active connections */
int b_useq; /* user send+rcv queues */
int b_work; /* in transit on work list */
int b_devq; /* device input/output queues */
int b_rfnm; /* blocked for rfnm */
int b_ipfr; /* ip fragment reassembly queues */
int b_tcbs; /* tcbs */
int b_tseq; /* tcp sequencing queues */
int b_tuna; /* tcp unacked message queues */
};
struct t_debug { /* tcp debugging record */
long t_tod; /* time of day */
struct tcb *t_tcb; /* -> tcb */
char t_old; /* old state */
char t_inp; /* input */
char t_tim; /* timer id */
char t_new; /* new state */
sequence t_sno; /* sequence number */
sequence t_ano; /* acknowledgement */
u_short t_wno; /* window */
u_short t_lno; /* length */
u_char t_flg; /* message flags */
};
#ifdef KERNEL
typedef struct socket netaddr;
struct work *workfree, *workNWORK; /* ->work entry table */
int nwork;
struct host *host, *hostNHOST; /* ->start, end of host table */
int nhost;
extern struct net netcb; /* network control block */
extern struct net_stat netstat; /* net statistics block */
#ifdef BUFSTAT
extern struct buf_stat bufstat; /* buffer stats */
#endif BUFSTAT
#ifdef mbb
holey_long long_1822();
long long_mbb();
#endif mbb
#endif KERNEL