路由器表指令/bin/route

/* * netstat This file contains an implementation of the command * that helps in debugging the networking modules. * * NET-TOOLS A collection of programs that form the base set of the * NET-3 Networking Distribution for the LINUX operating * system. * * Version: $Id: netstat.c,v 1.1.1.1 2003/08/18 05:40:38 kaohj Exp $ * * Authors: Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de> * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> * Phil Packer, <pep@wicked.demon.co.uk> * Johannes Stille, <johannes@titan.os.open.de> * Bernd Eckenfels, <net-tools@lina.inka.de> * Phil Blundell <philb@gnu.org> * Tuan Hoang <tqhoang@bigfoot.com> * * Tuned for NET3 by: * Alan Cox, <A.Cox@swansea.ac.uk> * Copyright (c) 1993 Fred Baumgarten * * Modified: * *960116 {1.01} Bernd Eckenfels: verbose, cleanups *960204 {1.10} Bernd Eckenfels: aftrans, usage, new route_info, * DLFT_AF *960204 {1.11} Bernd Eckenfels: netlink support *960204 {1.12} Bernd Eckenfels: route_init() *960215 {1.13} Bernd Eckenfels: netlink_print honors HAVE_ *960217 {1.14} Bernd Eckenfels: masq_info from Jos Vos and * ax25_info from Jonathan Naylor. *960218 {1.15} Bernd Eckenfels: ipx_info rewritten, -e for tcp/ipx *960220 {1.16} Bernd Eckenfels: minor output reformats, -a for -x *960221 {1.17} Bernd Eckenfels: route_init->getroute_init *960426 {1.18} Bernd Eckenfels: new RTACTION, SYM/NUM, FIB/CACHE *960517 {1.19} Bernd Eckenfels: usage() spelling fix and --unix inode, * ':' is part of sock_addr for --inet *960822 {x.xx} Frank Strauss: INET6 support * *970406 {1.33} Philip Copeland Added snmp reporting support module -s * code provided by Andi Kleen * (relly needs to be kernel hooked but * this will do in the meantime) * minor header file misplacement tidy up. *980815 {1.xx} Stephane Fillod: X.25 support *980411 {1.34} Arnaldo Carvalho i18n: catgets -> gnu gettext, substitution * of sprintf for snprintf *10/1998 Andi Kleen Use new interface primitives. *990101 {1.36} Bernd Eckenfels usage updated to include -s and -C -F, * fixed netstat -rC output (lib/inet_gr.c) * removed broken NETLINK Support * fixed format for /proc/net/udp|tcp|raw * added -w,-t,-u TcpExt support to -s *990131 {1.37} Jan Kratochvil added -p for prg_cache() & friends * Flames to <short@ucw.cz>. * Tuan Hoang added IGMP support for IPv4 and IPv6 * *990420 {1.38} Tuan Hoang removed a useless assignment from igmp_do_one() * * This program is free software; you can redistribute it * and/or modify it under the terms of the GNU General * Public License as published by the Free Software * Foundation; either version 2 of the License, or (at * your option) any later version. * */ #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <unistd.h> #include <ctype.h> #include <fcntl.h> #include <netdb.h> #include <paths.h> #include <pwd.h> #include <getopt.h> #include <sys/param.h> #include <sys/socket.h> #include <arpa/inet.h> #include <netinet/in.h> #include <sys/ioctl.h> #include <net/if.h> #include <dirent.h> #include "net-support.h" #include "pathnames.h" #include "version.h" #include "config.h" #include "intl.h" #include "sockets.h" #include "interface.h" #include "util.h" #define PROGNAME_WIDTH 20 #if !defined(s6_addr32) && defined(in6a_words) #define s6_addr32 in6a_words /* libinet6 */ #endif #if 0 /* prototypes for statistics.c */ void parsesnmp(int, int, int); void inittab(void); #endif typedef enum { SS_FREE = 0, /* not allocated */ SS_UNCONNECTED, /* unconnected to any socket */ SS_CONNECTING, /* in process of connecting */ SS_CONNECTED, /* connected to socket */ SS_DISCONNECTING /* in process of disconnecting */ } socket_state; #define SO_ACCEPTCON (1<<16) /* performed a listen */ #define SO_WAITDATA (1<<17) /* wait data to read */ #define SO_NOSPACE (1<<18) /* no space to write */ #define DFLT_AF "inet" #define FEATURE_NETSTAT #include "lib/net-features.h" char *Release = RELEASE, *Version = "netstat 1.39 (2000-05-21)", *Signature = "Fred Baumgarten, Alan Cox, Bernd Eckenfels, Phil Blundell, Tuan Hoang and others"; #define E_READ -1 #define E_IOCTL -3 int flag_int = 0; int flag_rou = 0; int flag_mas = 0; int flag_sta = 0; int flag_all = 0; int flag_lst = 0; int flag_cnt = 0; int flag_deb = 0; int flag_not = 0; int flag_cf = 0; int flag_opt = 0; int flag_raw = 0; int flag_tcp = 0; int flag_udp = 0; int flag_igmp= 0; int flag_rom = 0; int flag_exp = 1; int flag_prg = 0; int flag_arg = 0; int flag_ver = 0; int flag_x25 = 0; FILE *procinfo; #define INFO_GUTS1(file,name,proc) \ procinfo = fopen((file), "r"); \ if (procinfo == NULL) { \ if (errno != ENOENT) { \ perror((file)); \ return -1; \ } \ if (flag_arg || flag_ver) \ ESYSNOT("netstat", (name)); \ if (flag_arg) \ rc = 1; \ } else { \ do { \ if (fgets(buffer, sizeof(buffer), procinfo)) \ (proc)(lnr++, buffer); \ } while (!feof(procinfo)); \ fclose(procinfo); \ } #if HAVE_AFINET6 #define INFO_GUTS2(file,proc) \ lnr = 0; \ procinfo = fopen((file), "r"); \ if (procinfo != NULL) { \ do { \ if (fgets(buffer, sizeof(buffer), procinfo)) \ (proc)(lnr++, buffer); \ } while (!feof(procinfo)); \ fclose(procinfo); \ } #else #define INFO_GUTS2(file,proc) #endif #define INFO_GUTS3 \ return rc; #define INFO_GUTS6(file,file6,name,proc) \ char buffer[8192]; \ int rc = 0; \ int lnr = 0; \ if (!flag_arg || flag_inet) { \ INFO_GUTS1(file,name,proc) \ } \ if (!flag_arg || flag_inet6) { \ INFO_GUTS2(file6,proc) \ } \ INFO_GUTS3 #define INFO_GUTS(file,name,proc) \ char buffer[8192]; \ int rc = 0; \ int lnr = 0; \ INFO_GUTS1(file,name,proc) \ INFO_GUTS3 #define PROGNAME_WIDTHs PROGNAME_WIDTH1(PROGNAME_WIDTH) #define PROGNAME_WIDTH1(s) PROGNAME_WIDTH2(s) #define PROGNAME_WIDTH2(s) #s #define PRG_HASH_SIZE 211 static struct prg_node { struct prg_node *next; int inode; char name[PROGNAME_WIDTH]; } *prg_hash[PRG_HASH_SIZE]; static char prg_cache_loaded = 0; #define PRG_HASHIT(x) ((x) % PRG_HASH_SIZE) #define PROGNAME_BANNER "PID/Program name" #define print_progname_banner() do { if (flag_prg) printf("%-" PROGNAME_WIDTHs "s"," " PROGNAME_BANNER); } while (0) #define PRG_LOCAL_ADDRESS "local_address" #define PRG_INODE "inode" #define PRG_SOCKET_PFX "socket:[" #define PRG_SOCKET_PFXl (strlen(PRG_SOCKET_PFX)) #define PRG_SOCKET_PFX2 "[0000]:" #define PRG_SOCKET_PFX2l (strlen(PRG_SOCKET_PFX2)) #ifndef LINE_MAX #define LINE_MAX 4096 #endif #define PATH_PROC "/proc" #define PATH_FD_SUFF "fd" #define PATH_FD_SUFFl strlen(PATH_FD_SUFF) #define PATH_PROC_X_FD PATH_PROC "/%s/" PATH_FD_SUFF #define PATH_CMDLINE "cmdline" #define PATH_CMDLINEl strlen(PATH_CMDLINE) /* NOT working as of glibc-2.0.7: */ #undef DIRENT_HAVE_D_TYPE_WORKS static void prg_cache_add(int inode, char *name) { unsigned hi = PRG_HASHIT(inode);