Submitted by: Archie@Whistle.com (Archie Cobbs)
allow teh -a option to work with the -d option thus: arp -d -a now flushes your arp cache. also fix the -n option so that -an now works correctly.
This commit is contained in:
julian
parent
857944f486
commit
fec9363bc4
@ -3,5 +3,6 @@
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PROG= arp
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MAN8= arp.8
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MAN4= arp.4
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COPTS+= -Wall
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.include <bsd.prog.mk>
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@ -46,6 +46,10 @@
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.Fl a
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.Nm arp
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.Fl d Ar hostname
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.Op Ar proxy
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.Nm arp
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.Fl d
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.Fl a
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.Nm arp
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.Fl s Ar hostname ether_addr
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.Op Ar temp
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@ -72,7 +76,7 @@ using Internet dot notation.
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Available options:
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.Bl -tag -width Ds
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.It Fl a
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The program displays all of the current
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The program displays or deletes all of the current
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.Tn ARP
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entries.
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.It Fl d
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@ -80,7 +84,9 @@ A super-user may delete an entry for the host called
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.Ar hostname
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with the
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.Fl d
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flag.
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flag. May be combined with the
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.Fl a
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flag to delete all entries.
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.It Fl n
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Show network addresses as numbers (normally
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.Nm
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@ -45,7 +45,7 @@ static char const copyright[] =
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static char const sccsid[] = "@(#)from: arp.c 8.2 (Berkeley) 1/2/94";
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#endif
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static const char rcsid[] =
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"$Id$";
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"$Id: arp.c,v 1.12 1997/09/03 06:32:31 charnier Exp $";
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#endif /* not lint */
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/*
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@ -82,12 +82,17 @@ static const char rcsid[] =
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#include <strings.h>
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#include <unistd.h>
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void dump(u_long addr);
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void search(u_long addr, void (*action)(struct sockaddr_dl *sdl,
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struct sockaddr_inarp *sin, struct rt_msghdr *rtm));
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void print_entry(struct sockaddr_dl *sdl,
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struct sockaddr_inarp *sin, struct rt_msghdr *rtm);
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void nuke_entry(struct sockaddr_dl *sdl,
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struct sockaddr_inarp *sin, struct rt_msghdr *rtm);
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int delete(char *host, char *info);
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void ether_print(u_char *cp);
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void usage(void);
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int set(int argc, char **argv);
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void get(char *host);
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int get(char *host);
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int file(char *name);
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void getsocket(void);
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int my_ether_aton(char *a, u_char *n);
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@ -95,49 +100,96 @@ int rtmsg(int cmd);
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int get_ether_addr(u_long ipaddr, u_char *hwaddr);
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static int pid;
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static int nflag;
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static int nflag; /* no reverse dns lookups */
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static int aflag; /* do it for all entries */
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static int s = -1;
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/* which function we're supposed to do */
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#define F_GET 1
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#define F_SET 2
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#define F_FILESET 3
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#define F_REPLACE 4
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#define F_DELETE 5
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#define SETFUNC(f) { if (func) usage(); func = (f); }
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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int ch;
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int ch, func = 0;
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int rtn = 0;
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pid = getpid();
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while ((ch = getopt(argc, argv, "andfsS")) != -1)
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switch((char)ch) {
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case 'a':
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dump(0);
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exit(0);
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aflag = 1;
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break;
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case 'd':
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if (argc < 3 || argc > 4)
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usage();
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delete(argv[2], argv[3]);
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exit(0);
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SETFUNC(F_DELETE);
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break;
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case 'n':
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nflag = 1;
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continue;
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break;
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case 'S':
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delete(argv[2], NULL);
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/* FALL THROUGH */
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SETFUNC(F_REPLACE);
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break;
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case 's':
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if (argc < 4 || argc > 7)
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usage();
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exit(set(argc-2, &argv[2]) ? 1 : 0);
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SETFUNC(F_SET);
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break;
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case 'f' :
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if (argc != 3)
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usage();
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return (file(argv[2]));
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SETFUNC(F_FILESET);
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break;
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case '?':
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default:
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usage();
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}
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if (argc != 2)
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usage();
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get(argv[1]);
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exit(0);
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argc -= optind;
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argv += optind;
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if (!func)
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func = F_GET;
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switch (func) {
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case F_GET:
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if (aflag) {
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if (argc != 0)
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usage();
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search(0, print_entry);
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} else {
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if (argc != 1)
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usage();
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get(argv[0]);
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}
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break;
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case F_SET:
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case F_REPLACE:
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if (argc < 2 || argc > 5)
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usage();
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if (func == F_REPLACE)
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(void) delete(argv[0], NULL);
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rtn = set(argc, argv) ? 1 : 0;
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break;
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case F_DELETE:
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if (aflag) {
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if (argc != 0)
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usage();
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search(0, nuke_entry);
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} else {
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if (argc < 1 || argc > 2)
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usage();
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rtn = delete(argv[0], argv[1]);
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}
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break;
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case F_FILESET:
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if (argc != 1)
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usage();
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rtn = file(argv[0]);
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break;
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}
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return(rtn);
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}
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/*
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@ -285,7 +337,7 @@ set(int argc, char **argv)
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/*
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* Display an individual arp entry
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*/
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void
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int
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get(char *host)
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{
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struct hostent *hp;
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@ -299,12 +351,13 @@ get(char *host)
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bcopy((char *)hp->h_addr, (char *)&sin->sin_addr,
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sizeof sin->sin_addr);
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}
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dump(sin->sin_addr.s_addr);
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search(sin->sin_addr.s_addr, print_entry);
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if (found_entry == 0) {
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printf("%s (%s) -- no entry\n",
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host, inet_ntoa(sin->sin_addr));
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exit(1);
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return(1);
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}
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return(0);
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}
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/*
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@ -367,19 +420,19 @@ delete(char *host, char *info)
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}
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/*
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* Dump the entire arp table
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* Search the arp table and do some action on matching entries
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*/
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void
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dump(u_long addr)
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search(u_long addr, void (*action)(struct sockaddr_dl *sdl,
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struct sockaddr_inarp *sin, struct rt_msghdr *rtm))
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{
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int mib[6];
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size_t needed;
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char *host, *lim, *buf, *next;
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char *lim, *buf, *next;
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struct rt_msghdr *rtm;
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struct sockaddr_inarp *sin;
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struct sockaddr_dl *sdl;
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extern int h_errno;
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struct hostent *hp;
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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@ -403,39 +456,66 @@ dump(u_long addr)
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continue;
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found_entry = 1;
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}
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if (nflag == 0)
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hp = gethostbyaddr((caddr_t)&(sin->sin_addr),
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sizeof sin->sin_addr, AF_INET);
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else
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hp = 0;
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if (hp)
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host = hp->h_name;
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else {
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host = "?";
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if (h_errno == TRY_AGAIN)
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nflag = 1;
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}
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printf("%s (%s) at ", host, inet_ntoa(sin->sin_addr));
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if (sdl->sdl_alen)
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ether_print(LLADDR(sdl));
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else
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printf("(incomplete)");
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if (rtm->rtm_rmx.rmx_expire == 0)
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printf(" permanent");
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if (sin->sin_other & SIN_PROXY)
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printf(" published (proxy only)");
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if (rtm->rtm_addrs & RTA_NETMASK) {
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sin = (struct sockaddr_inarp *)
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(sdl->sdl_len + (char *)sdl);
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if (sin->sin_addr.s_addr == 0xffffffff)
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printf(" published");
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if (sin->sin_len != 8)
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printf("(wierd)");
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}
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printf("\n");
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(*action)(sdl, sin, rtm);
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}
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}
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/*
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* Display an arp entry
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*/
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void
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print_entry(struct sockaddr_dl *sdl,
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struct sockaddr_inarp *sin, struct rt_msghdr *rtm)
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{
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char *host;
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extern int h_errno;
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struct hostent *hp;
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if (nflag == 0)
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hp = gethostbyaddr((caddr_t)&(sin->sin_addr),
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sizeof sin->sin_addr, AF_INET);
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else
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hp = 0;
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if (hp)
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host = hp->h_name;
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else {
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host = "?";
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if (h_errno == TRY_AGAIN)
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nflag = 1;
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}
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printf("%s (%s) at ", host, inet_ntoa(sin->sin_addr));
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if (sdl->sdl_alen)
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ether_print(LLADDR(sdl));
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else
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printf("(incomplete)");
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if (rtm->rtm_rmx.rmx_expire == 0)
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printf(" permanent");
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if (sin->sin_other & SIN_PROXY)
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printf(" published (proxy only)");
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if (rtm->rtm_addrs & RTA_NETMASK) {
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sin = (struct sockaddr_inarp *)
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(sdl->sdl_len + (char *)sdl);
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if (sin->sin_addr.s_addr == 0xffffffff)
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printf(" published");
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if (sin->sin_len != 8)
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printf("(wierd)");
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}
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printf("\n");
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}
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/*
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* Nuke an arp entry
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*/
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void
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nuke_entry(struct sockaddr_dl *sdl,
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struct sockaddr_inarp *sin, struct rt_msghdr *rtm)
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{
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char ip[20];
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snprintf(ip, sizeof(ip), "%s", inet_ntoa(sin->sin_addr));
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delete(ip, NULL);
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}
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void
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ether_print(u_char *cp)
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{
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@ -461,10 +541,11 @@ my_ether_aton(char *a, u_char *n)
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void
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usage(void)
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{
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fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
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fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
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"usage: arp [-n] hostname",
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" arp [-n] -a [kernel] [kernel_memory]",
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" arp -d hostname",
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" arp [-n] -a",
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" arp -d hostname [proxy]",
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" arp -d -a",
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" arp -s hostname ether_addr [temp] [pub]",
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" arp -S hostname ether_addr [temp] [pub]",
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" arp -f filename");
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