/* in_systm.h 4.10 82/04/20 */
* Miscellaneous internetwork
* definitions for kernel.
* Internally the system keeps counters in the headers with the bytes
* swapped so that VAX instructions will work on them. It reverses
* the bytes before transmission at each protocol level. The n_ types
* represent the types with the bytes in ``high-ender'' order.
typedef u_short n_short
; /* short as received from the net */
typedef u_long n_long
; /* long as received from the net */
typedef u_long n_time
; /* ms since 00:00 GMT, byte rev */
* The internet code runs off software interrupts.
* You can switch into the network by doing splnet() and return by splx().
* The software interrupt level for the network is higher than the software
* level for the clock (so you can enter the network in routines called
* at timeout time). Splimp is an ipl high enough to block all imps.
* While manipulating the mbuf buffer pool you have to block imps.
/* splnet is defined in ../sys/asm.sed */
#define setsoftnet() mtpr(SIRR, 12)
* Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
* word which is used to de-multiplex a single software
* interrupt used for scheduling the network code to calls
* on the lowest level routine of each protocol.
#define NETISR_RAW 0 /* same as AF_UNSPEC */
#define NETISR_IP 2 /* same as AF_INET */
#define NETISR_NS 6 /* same as AF_NS */
#define schednetisr(anisr) { netisr |= 1<<(anisr); setsoftnet(); }
int netisr
; /* scheduling bits for network */
#include "../inet/count.h"
#define COUNT(i) nrcount[i]++
int nrcount
[NCOUNTERS
+1];