/* * Tcp initialization */ void tcp_init() { int hashsize = TCBHASHSIZE; tcp_ccgen = 1; tcp_cleartaocache(); tcp_delacktime = TCPTV_DELACK; tcp_keepinit = TCPTV_KEEP_INIT; tcp_keepidle = TCPTV_KEEP_IDLE; tcp_keepintvl = TCPTV_KEEPINTVL; tcp_maxpersistidle = TCPTV_KEEP_IDLE; tcp_msl = TCPTV_MSL; tcp_rexmit_min = TCPTV_MIN; tcp_rexmit_slop = TCPTV_CPU_VAR; LIST_INIT(&tcb); tcbinfo.listhead = &tcb; TUNABLE_INT_FETCH("net.inet.tcp.tcbhashsize", &hashsize); if (!powerof2(hashsize)) { printf("WARNING: TCB hash size not a power of 2\n"); hashsize = 512; /* safe default */ } tcp_tcbhashsize = hashsize; tcbinfo.hashbase = hashinit(hashsize, M_PCB, &tcbinfo.hashmask); tcbinfo.porthashbase = hashinit(hashsize, M_PCB, &tcbinfo.porthashmask); tcbinfo.ipi_zone = zinit("tcpcb", sizeof(struct inp_tp), maxsockets, ZONE_INTERRUPT, 0); tcp_reass_maxseg = nmbclusters / 16; TUNABLE_INT_FETCH("net.inet.tcp.reass.maxsegments", &tcp_reass_maxseg); #ifdef INET6 #define TCP_MINPROTOHDR (sizeof(struct ip6_hdr) + sizeof(struct tcphdr)) #else /* INET6 */ #define TCP_MINPROTOHDR (sizeof(struct tcpiphdr)) #endif /* INET6 */ if (max_protohdr < TCP_MINPROTOHDR) max_protohdr = TCP_MINPROTOHDR; if (max_linkhdr + TCP_MINPROTOHDR > MHLEN) panic("tcp_init"); #undef TCP_MINPROTOHDR syncache_init(); }
/* * Tcp initialization */ void tcp_init() { int hashsize = TCBHASHSIZE; vm_size_t str_size; int i; tcp_ccgen = 1; tcp_cleartaocache(); tcp_delacktime = TCPTV_DELACK; tcp_keepinit = TCPTV_KEEP_INIT; tcp_keepidle = TCPTV_KEEP_IDLE; tcp_keepintvl = TCPTV_KEEPINTVL; tcp_maxpersistidle = TCPTV_KEEP_IDLE; tcp_msl = TCPTV_MSL; read_random(&tcp_now, sizeof(tcp_now)); tcp_now = tcp_now & 0x7fffffffffffffff; /* Starts tcp internal 500ms clock at a random value */ LIST_INIT(&tcb); tcbinfo.listhead = &tcb; #ifndef __APPLE__ TUNABLE_INT_FETCH("net.inet.tcp.tcbhashsize", &hashsize); #endif if (!powerof2(hashsize)) { printf("WARNING: TCB hash size not a power of 2\n"); hashsize = 512; /* safe default */ } tcp_tcbhashsize = hashsize; tcbinfo.hashsize = hashsize; tcbinfo.hashbase = hashinit(hashsize, M_PCB, &tcbinfo.hashmask); tcbinfo.porthashbase = hashinit(hashsize, M_PCB, &tcbinfo.porthashmask); #ifdef __APPLE__ str_size = (vm_size_t) sizeof(struct inp_tp); tcbinfo.ipi_zone = (void *) zinit(str_size, 120000*str_size, 8192, "tcpcb"); #else tcbinfo.ipi_zone = zinit("tcpcb", sizeof(struct inp_tp), maxsockets, ZONE_INTERRUPT, 0); #endif tcp_reass_maxseg = nmbclusters / 16; #ifndef __APPLE__ TUNABLE_INT_FETCH("net.inet.tcp.reass.maxsegments", &tcp_reass_maxseg); #endif #if INET6 #define TCP_MINPROTOHDR (sizeof(struct ip6_hdr) + sizeof(struct tcphdr)) #else /* INET6 */ #define TCP_MINPROTOHDR (sizeof(struct tcpiphdr)) #endif /* INET6 */ if (max_protohdr < TCP_MINPROTOHDR) max_protohdr = TCP_MINPROTOHDR; if (max_linkhdr + TCP_MINPROTOHDR > MHLEN) panic("tcp_init"); #undef TCP_MINPROTOHDR tcbinfo.last_pcb = 0; dummy_tcb.t_state = TCP_NSTATES; dummy_tcb.t_flags = 0; tcbinfo.dummy_cb = (caddr_t) &dummy_tcb; in_pcb_nat_init(&tcbinfo, AF_INET, IPPROTO_TCP, SOCK_STREAM); delack_bitmask = _MALLOC((4 * hashsize)/32, M_PCB, M_WAITOK); if (delack_bitmask == 0) panic("Delack Memory"); for (i=0; i < (tcbinfo.hashsize / 32); i++) delack_bitmask[i] = 0; for (i=0; i < N_TIME_WAIT_SLOTS; i++) { LIST_INIT(&time_wait_slots[i]); } }