1/*- 2 * Copyright (c) 1999, 2000, 2001 Boris Popov 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/errno.h> 33#include <sys/eventhandler.h> 34#include <sys/kernel.h> 35#include <sys/lock.h> 36#include <sys/malloc.h> 37#include <sys/proc.h> 38#include <sys/sysctl.h> 39#include <sys/time.h> 40 41#include <netncp/ncp.h> 42#include <netncp/ncp_conn.h> 43#include <netncp/ncp_sock.h> 44#include <netncp/ncp_subr.h> 45#include <netncp/ncp_rq.h> 46#include <netncp/ncp_ncp.h> 47#include <netncp/nwerror.h> 48 49int ncp_debuglevel = 0; 50 51struct callout_handle ncp_timer_handle; 52static eventhandler_tag ncp_exit_tag; 53 54static void ncp_at_exit(void *arg, struct proc *p); 55static void ncp_timer(void *arg); 56 57/* 58 * duplicate string from user space. It should be very-very slow. 59 */ 60char * 61ncp_str_dup(char *s) { 62 char *p, bt; 63 int len = 0; 64 65 for (p = s;;p++) { 66 if (copyin(p, &bt, 1)) return NULL; 67 len++; 68 if (bt == 0) break; 69 } 70 p = malloc(len, M_NCPDATA, M_WAITOK); 71 copyin(s, p, len); 72 return p; 73} 74 75 76void 77ncp_at_exit(void *arg, struct proc *p) 78{ 79 struct ncp_conn *ncp, *nncp; 80 struct thread *td; 81 82 mtx_lock(&Giant); 83 FOREACH_THREAD_IN_PROC(p, td) { 84 if (ncp_conn_putprochandles(td) == 0) 85 continue; 86 87 ncp_conn_locklist(LK_EXCLUSIVE, td); 88 for (ncp = SLIST_FIRST(&conn_list); ncp; ncp = nncp) { 89 nncp = SLIST_NEXT(ncp, nc_next); 90 if (ncp_conn_lock(ncp, td, td->td_ucred, 91 NCPM_READ | NCPM_EXECUTE | NCPM_WRITE)) 92 continue; 93 if (ncp_conn_free(ncp) != 0) 94 ncp_conn_unlock(ncp, td); 95 } 96 ncp_conn_unlocklist(td); 97 } 98 mtx_unlock(&Giant); 99} 100 101int 102ncp_init(void) 103{ 104 ncp_conn_init(); 105 ncp_exit_tag = EVENTHANDLER_REGISTER(process_exit, ncp_at_exit, NULL, 106 EVENTHANDLER_PRI_ANY); 107 ncp_timer_handle = timeout(ncp_timer, NULL, NCP_TIMER_TICK); 108 return 0; 109} 110 111int 112ncp_done(void) 113{ 114 int error; 115 116 error = ncp_conn_destroy(); 117 if (error) 118 return error; 119 untimeout(ncp_timer, NULL, ncp_timer_handle); 120 EVENTHANDLER_DEREGISTER(process_exit, ncp_exit_tag); 121 return 0; 122} 123 124 125/* tick every second and check for watch dog packets and lost connections */ 126static void 127ncp_timer(void *arg) 128{ 129 struct ncp_conn *conn; 130 131 if(ncp_conn_locklist(LK_SHARED | LK_NOWAIT, NULL) == 0) { 132 SLIST_FOREACH(conn, &conn_list, nc_next) 133 ncp_check_conn(conn); 134 ncp_conn_unlocklist(NULL); 135 } 136 ncp_timer_handle = timeout(ncp_timer, NULL, NCP_TIMER_TICK); 137} 138