1 /* in_systm.h 4.8 82/03/19 */ 2 3 /* 4 * Miscellaneous internetwork 5 * definitions for kernel. 6 */ 7 8 #ifndef LOCORE 9 /* 10 * Network types. 11 * 12 * Internally the system keeps counters in the headers with the bytes 13 * swapped so that VAX instructions will work on them. It reverses 14 * the bytes before transmission at each protocol level. The n_ types 15 * represent the types with the bytes in ``high-ender'' order. 16 */ 17 typedef u_short n_short; /* short as received from the net */ 18 typedef u_long n_long; /* long as received from the net */ 19 20 typedef u_long n_time; /* ms since 00:00 GMT, byte rev */ 21 #endif 22 23 /* 24 * The internet code runs off software interrupts. 25 * 26 * You can switch into the network by doing splnet() and return by splx(). 27 * The software interrupt level for the network is higher than the software 28 * level for the clock (so you can enter the network in routines called 29 * at timeout time). Splimp is an ipl high enough to block all imps. 30 * While manipulating the mbuf buffer pool you have to block imps. 31 */ 32 33 /* splnet is defined in ../sys/asm.sed */ 34 #define splimp spl5 35 #define setsoftnet() mtpr(SIRR, 12) 36 37 /* 38 * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status 39 * word which is used to de-multiplex a single software 40 * interrupt used for scheduling the network code to calls 41 * on the lowest level routine of each protocol. 42 */ 43 #define NETISR_RAW 0 /* same as AF_UNSPEC */ 44 #define NETISR_IP 2 /* same as AF_INET */ 45 #define NETISR_NS 6 /* same as AF_NS */ 46 47 #define schednetisr(anisr) { netisr |= 1<<(anisr); setsoftnet(); } 48 49 #ifndef LOCORE 50 #ifdef KERNEL 51 int netisr; /* scheduling bits for network */ 52 #endif 53 54 55 #ifdef KERNEL 56 n_time iptime(); 57 #endif 58 59 #ifdef KPROF 60 #include "../inet/count.h" 61 #define COUNT(i) nrcount[i]++ 62 int nrcount[NCOUNTERS+1]; 63 #else 64 #define COUNT(i) 65 #endif 66 #endif 67