1 /* 2 * Copyright (c) 2008 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <sys/socket.h> 38 #include <sys/un.h> 39 #include <netinet/in.h> 40 #include <netdb.h> 41 #include <arpa/inet.h> 42 #include <sys/queue.h> 43 #include <sys/filio.h> 44 #include <sys/sockio.h> 45 #include <net/if.h> 46 #include <net/ethernet.h> 47 #include <net/bridge/if_bridgevar.h> 48 #include <stdio.h> 49 #include <signal.h> 50 #include <stdlib.h> 51 #include <stddef.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <fcntl.h> 55 #include <errno.h> 56 #include <assert.h> 57 #include <err.h> 58 #include <grp.h> 59 60 #include <pthread.h> 61 62 struct ioinfo; 63 TAILQ_HEAD(mac_list, mac); 64 65 typedef struct bridge { 66 TAILQ_ENTRY(bridge) entry; 67 struct mac_list mac_list; 68 struct bridge *fd_next; 69 struct ioinfo *io; 70 int flags; 71 } *bridge_t; 72 73 typedef struct mac { 74 TAILQ_ENTRY(mac) lru_entry; 75 TAILQ_ENTRY(mac) bridge_entry; 76 struct mac *mac_next; 77 bridge_t bridge; 78 u_int8_t macbuf[6]; 79 } *mac_t; 80 81 #define BRIDGE_HSIZE 256 82 #define BRIDGE_HMASK (BRIDGE_HSIZE - 1) 83 84 #define MAC_HSIZE 1024 85 #define MAC_HMASK (MAC_HSIZE - 1) 86 87 #define NMACS 1024 88 89 #define MAXPKT (8192 + 128) 90 91 typedef struct ioinfo { 92 int fd; 93 int istap; 94 } *ioinfo_t; 95 96 extern int SecureOpt; 97 extern struct in_addr NetAddress; 98 extern struct in_addr NetMask; 99 100 bridge_t bridge_add(ioinfo_t io); 101 void bridge_del(bridge_t bridge); 102 void bridge_packet(bridge_t bridge, u_int8_t *pkt, int bytes); 103 104 void mac_init(void); 105 mac_t mac_find(u_int8_t *macbuf); 106 void mac_add(bridge_t bridge, u_int8_t *macbuf); 107 void mac_delete(mac_t mac); 108 int mac_broadcast(u_int8_t *macbuf); 109 110 int filter_ok(u_int8_t *pkt, int bytes); 111 112