1The following parameters should be tunable at compile time. Some of them 2exist as sysctls too. 3 4This is far from complete 5 6Item Description 7---------------------------------------------------------------------------- 8MAX_SOCKETS Tunable on boot, maximum sockets we will allocate 9NUM_PROTO Maximum loadable address family, will need recompile 10MAX_LINKS Maximum number of netlink minor devices. (1-32) 11MAX_QBYTES Size of a netlink device queue (tunable) 12RIF_TABLE_SIZE Token ring RIF cache size (tunable) 13AARP_HASH_SIZE Size of Appletalk hash table (tunable) 14AX25_DEF_T1 AX.25 parameters. These are all tunable via 15AX25_DEF_T2 SIOCAX25SETPARMS 16AX25_DEF_T3 T1-T3,N2 have the meanings in the specification 17AX25_DEF_N2 18AX25_DEF_AXDEFMODE 8 = normal 128 is PE1CHL extended 19AX25_DEF_IPDEFMODE 'D' - datagram 'V' - virtual connection 20AX25_DEF_BACKOFF 'E'xponential 'L'inear 21AX25_DEF_NETROM Allow netrom 1=Y 22AX25_DF_TEXT Allow PID=Text 1=Y 23AX25_DEF_WINDOW Window for normal mode 24AX25_DEF_EWINDOW Window for PE1CHL mode 25AX25_DEF_DIGI 1 for inband 2 for cross band 3 for both 26AX25_DEF_CONMODE Allow connected modes 1=Yes 27AX25_ROUTE_MAX AX.25 route cache size - no currently tunable 28Unnamed (16) Number of protocol hash slots (tunable) 29DEV_NUMBUFFS Number of priority levels (not easily tunable) 30Unnamed (300) Maximum packet backlog queue (tunable) 31MAX_IOVEC Maximum number of iovecs in a message (tunable) 32MIN_WINDOW Offered minimum window (tunable) 33MAX_WINDOW Offered maximum window (tunable) 34MAX_HEADER Largest physical header (tunable) 35MAX_ADDR_LEN Largest physical address (tunable) 36SOCK_ARRAY_SIZE IP socket array hash size (tunable) 37ARP_RES_TIME Time we try to resolve (tunable) 38ARP_DEAD_RES_TIME Time the entry stays dead (tunable) 39ARP_MAX_TRIES Maximum tries (tunable) 40ARP_TIMEOUT Timeout on an ARP (tunable) 41ARP_CHECK_INTERVAL Check interval to refresh an arp (tunable) 42ARP_CONFIRM_INTERVAL Confirm poll time (tunable) 43ARP_TABLE_SIZE Hash table size for ARP (tunable) 44IP_MAX_MEMBERSHIPS Largest number of groups per socket (BSD style) (tunable) 4516 Hard coded constant for amount of room allowed for 46 cache align and faster forwarding (tunable) 47IPFRAG_HIGH_THRESH Limit on fragments, we free fragments until we reach 48IPFRAG_LOW_THRESH which provides some breathing space. (tunable) 49IP_FRAG_TIME Time we hold a fragment for. (tunable) 50PORT_MASQ_BEGIN First port reserved for masquerade (tunable) 51PORT_MASQ_END Last port used for masquerade (tunable) 52MASQUERADE_EXPIRE_TCP_FIN Time we keep a masquerade for after a FIN 53MASQUERADE_EXPIRE_UDP Time we keep a UDP masquerade for (tunable) 54MAXVIFS Maximum mrouted vifs (1-32) 55MFC_LINES Lines in the multicast router cache (tunable) 56 57NetROM parameters are tunable via an ioctl passing a struct 58 594000 Size a Unix domain socket malloc falls back to 60 (tunable) should be 8K - a bit for 8K machines like 61 the ALPHA 62 63