implog.c

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C语言 代码 · 共 520 行

#ifndef lint
static	char	*sccsid = "@(#)implog.c	4.1	(ULTRIX)	7/2/90";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1984,1988 by			*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */
/*
#ifndef lint
char copyright[] =
" Copyright (c) 1983 Regents of the University of California.\n\
 All rights reserved.\n";
#endif not lint

#ifndef lint
static char sccsid[] = "implog.c	5.5 (Berkeley) 5/30/86";
#endif not lint
*/
#include <stdio.h>
#include <signal.h>
#include <sgtty.h>

#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>

#include <netinet/in.h>
#define	IMPLEADERS
#include <netimp/if_imp.h>

#define	min(a, b)	((a) < (b) ? (a) : (b))

u_char	buf[1024];
int	showdata = 1;
int	showcontents = 0;
int	rawheader = 0;
int	follow = 0;
int	link = -1;
int	host = -1;
int	imp = -1;
int	packettype = -1;
extern	int errno;
int	log;
char	*logfile = "/usr/adm/implog";

/*
 * Socket address, internet style, with
 * unused space taken by timestamp and packet
 * size.
 */
struct sockstamp {
	short	sin_family;
	u_short	sin_port;
	struct	in_addr sin_addr;
	time_t	sin_time;
	int	sin_cc;
};
struct	sockstamp from;

main(argc, argv)
	char *argv[];
{
	struct stat b;
	int size;
	char *cp;
	int hostfrom, impfrom;

	argc--, argv++;
	while (argc > 0 && argv[0][0] == '-') {
		if (strcmp(*argv, "-D") == 0) {
			showdata = 0;
			argv++, argc--;
			continue;
		}
		if (strcmp(*argv, "-f") == 0) {
			follow++;
			argv++, argc--;
			continue;
		}
		if (strcmp(*argv, "-c") == 0) {
			showcontents++;
			argv++, argc--;
			continue;
		}
		if (strcmp(*argv, "-r") == 0) {
			rawheader++;
			argv++, argc--;
			continue;
		}
		if (strcmp(*argv, "-l") == 0) {
			argc--, argv++;
			if (argc > 0) {
				link = atoi(*argv);
				argc--, argv++;
			} else
				link = IMPLINK_IP;
			continue;
		}
		if (strcmp(*argv, "-h") == 0) {
			argc--, argv++;
			if (argc < 1) {
				printf("-h: missing host #\n");
				exit(2);
			}
			host = atoi(*argv);
			argv++, argc--;
			continue;
		}
		if (strcmp(*argv, "-i") == 0) {
			argc--, argv++;
			if (argc < 1) {
				printf("-i: missing imp #\n");
				exit(2);
			}
			imp = atoi(*argv);
			argv++, argc--;
			continue;
		}
		if (strcmp(*argv, "-t") == 0) {
			argc--, argv++;;
			if (argc < 1) {
				printf("-t: missing packet type\n");
				exit(2);
			}
			packettype = atoi(*argv);
			argv++, argc--;;
			continue;
		}
		printf("usage: implog [ -D ] [ -c ] [ -f ] [ -r ] [-h #] [-i #] [ -t # ] [-l [#]] [logfile]\n");
		exit(2);
	}
	if (argc > 0)
		logfile = argv[0];
	log = open(logfile, 0);
	if (log < 0) {
		perror(logfile);
		exit(1);
	}
	fstat(log, &b);
	size = b.st_size;
again:
	while (read(log, (char *)&from, sizeof(from)) == sizeof(from)) {
		if (from.sin_family == 0) {
			printf("restarted: %.24s\n", ctime(&from.sin_time));
			continue;
		}
		if (host >= 0) {
			long addr = ntohs(from.sin_addr.s_addr);

			if (IN_CLASSA(addr)) {
				hostfrom = ((addr>>16) & 0xFF);
				impfrom = addr & 0xFF;
			} else if (IN_CLASSB(addr)) {
				hostfrom = ((addr>>8) & 0xFF);
				impfrom = addr & 0xFF;
			} else {
				hostfrom = ((addr>>4) & 0xF);
				impfrom = addr & 0xF;
			}
		}
		if (host >= 0 && hostfrom != host) {
			lseek(log, from.sin_cc, 1);
			continue;
		}
		if (imp >= 0 && impfrom != imp) {
			lseek(log, from.sin_cc, 1);
			continue;
		}
		process(log, &from);
	}
	while (follow) {
		fflush(stdout);
		sleep(5);
		fstat(log, &b);
		if (b.st_size > size) {
			size = b.st_size;
			goto again;
		}
	}
}

int	impdata(), impbadleader(), impdown(), impnoop();
int	imprfnm(), impincomplete(), imphostdead(), imphostunreach();
int	impbaddata(), impreset(), impretry(), impnotify(), imptrying();
int	impready(), impundef();

struct	messages {
	u_char	m_type;		/* type of message */
	int	(*m_func)();	/* routine to process message */
} mtypes[] = {
	{ IMPTYPE_DATA,		impdata },
	{ IMPTYPE_BADLEADER,	impbadleader },
	{ IMPTYPE_DOWN,		impdown },
	{ IMPTYPE_NOOP,		impnoop },
	{ IMPTYPE_RFNM,		imprfnm },
	{ IMPTYPE_INCOMPLETE,	impincomplete },
	{ IMPTYPE_HOSTDEAD,	imphostdead },
	{ IMPTYPE_HOSTUNREACH,	imphostunreach },
	{ IMPTYPE_BADDATA,	impbaddata },
	{ IMPTYPE_RESET,	impreset },
	{ IMPTYPE_RETRY,	impretry },
	{ IMPTYPE_NOTIFY,	impnotify },
	{ IMPTYPE_TRYING,	imptrying },
	{ IMPTYPE_READY,	impready },
	{ -1,			impundef }
};

/*
 * Print a packet.
 */
process(l, f)
	int l;
	struct sockstamp *f;
{
	register struct messages *mp;
	struct imp_leader *ip;
	int (*fn)();

	if (read(l, (char *)buf, f->sin_cc) != f->sin_cc) {
		perror("read");
		return;
	}
	ip = (struct imp_leader *)buf;
	ip->il_imp = ntohs(ip->il_imp);
	if (ip->il_format != IMP_NFF)
		fn = impundef;
	else {
		for (mp = mtypes; mp->m_type != -1; mp++)
			if (mp->m_type == ip->il_mtype)
				break;
		fn = mp->m_func;
	}
	if (ip->il_mtype == IMPTYPE_DATA) {
		if (link >= 0 && ip->il_link != link)
			return;
		if (!showdata)
			return;
	}
	if (packettype >= 0 && ip->il_mtype != packettype)
		return;
	printf("%.24s: ", ctime(&f->sin_time));
	if (f->sin_cc < sizeof(struct control_leader))
		printf("(truncated header, %d bytes): ", f->sin_cc);
	(*fn)(ip, f->sin_cc);
	if (rawheader && fn != impundef) {
		putchar('\t');
		impundef(ip, f->sin_cc);
	}
}

impdata(ip, cc)
	register struct imp_leader *ip;
{
	printf("<DATA, source=%d/%d, link=", ip->il_host, (u_short)ip->il_imp);
	if (ip->il_link == IMPLINK_IP)
		printf("ip,");
	else
		printf("%d,", ip->il_link);
	printf(" len=%d bytes>\n", ntohs((u_short)ip->il_length) >> 3);
	if (showcontents) {
		register u_char *cp = ((u_char *)ip) + sizeof(*ip);
		register int i;

		i = (ntohs(ip->il_length) >> 3) - sizeof(struct imp_leader);
		cc = min(i, cc);
		printf("data: (%d bytes)", cc);
		for (i = 0; i < cc; i++, cp++) {
			if (i % 25 == 0)
				printf("\n");
			printf("%02x ", *cp);
		}
		putchar('\n');
	}
}

char *badleader[] = {
	"error flip-flop set",
	"message < 80 bits",
	"illegal type field",
	"opposite leader type"
};

impbadleader(ip)
	register struct imp_leader *ip;
{
	printf("bad leader: ");
	if (ip->il_subtype > IMPLEADER_OPPOSITE)
		printf("%x\n", ip->il_subtype);
	else
		printf("%s\n", badleader[ip->il_subtype]);
}

char *down[] = {
	"in 30 secs",
	"for hardware pm",
	"for software reload",
	"for emergency restart"
};

impdown(ip)
	register struct imp_leader *ip;
{
	int tdown, tbackup;

	printf("imp going down %s", down[ip->il_link & IMP_DMASK]);
	tdown = ((ip->il_link >> 2) & 0xf) * 5;
	if (ip->il_link & IMP_DMASK)
		printf(" in %d minutes", tdown);
	tbackup = ip->il_subtype * 5;
	printf(": back up ");
	if (tbackup)
		printf("%d minutes\n", tbackup);
	else
		printf("immediately\n");
}

impnoop(ip)
	register struct imp_leader *ip;
{
	printf("noop: host %d, imp %d\n", ip->il_host,
		(u_short)ip->il_imp);
}

imprfnm(ip)
	register struct imp_leader *ip;
{
	printf("rfnm: htype=%x, source=%d/%d, link=",
		ip->il_htype, ip->il_host, ip->il_imp);
	if (ip->il_link == IMPLINK_IP)
		printf("ip,");
	else
		printf("%d,", ip->il_link);
	printf(" subtype=%x\n", ip->il_subtype);
}

char *hostdead[] = {
	"#0",
	"ready-line negated",
	"tardy receiving messages",
	"ncc doesn't know host",
	"imp software won't allow messages",
	"host down for scheduled pm",
	"host down for hardware work",
	"host down for software work",
	"host down for emergency restart",
	"host down because of power outage",
	"host stopped at a breakpoint",
	"host down due to hardware failure",
	"host not scheduled to be up",
	"#13",
	"#14",
	"host in the process of coming up"
};

imphostdead(ip)
	register struct imp_leader *ip;
{
	printf("host %d/%d dead: ", ip->il_host, ip->il_imp);
	if (ip->il_link & IMP_DMASK)
		printf("down %s, ", down[ip->il_link & IMP_DMASK]);
	if (ip->il_subtype <= IMPHOST_COMINGUP)
		printf("%s\n", hostdead[ip->il_subtype]);
	else
		printf("subtype=%x\n", ip->il_subtype);
}

char *hostunreach[] = {
	"destination imp can't be reached",
	"destination host isn't up",
	"host doesn't support long leader",
	"communication is prohibited"
};

imphostunreach(ip)
	register struct imp_leader *ip;
{
	printf("host %d/%d unreachable: ", ip->il_host, ip->il_imp);
	if (ip->il_subtype <= IMPREACH_PROHIBITED)
		printf("%s\n", hostunreach[ip->il_subtype]);
	else
		printf("subtype=%x\n", ip->il_subtype);
}

impbaddata(ip)
	register struct imp_leader *ip;
{
	printf("error in data: htype=%x, source=%d/%d, link=",
		ip->il_htype, ip->il_host, ip->il_imp);
	if (ip->il_link == IMPLINK_IP)
		printf("ip, ");
	else
		printf("%d, ", ip->il_link);
	printf("subtype=%x\n", ip->il_subtype);
}

char *incomplete[] = {
	"host didn't take data fast enough",
	"message was too long",
	"message transmission time > 15 seconds",
	"imp/circuit failure",
	"no resources within 15 seconds",
	"source imp i/o failure during receipt"
};

impincomplete(ip)
	register struct imp_leader *ip;
{
	printf("incomplete: htype=%x, source=%d/%d, link=",
		ip->il_htype, ip->il_host, ip->il_imp);
	if (ip->il_link == IMPLINK_IP)
		printf("ip,");
	else
		printf("%d,", ip->il_link);
	if (ip->il_subtype <= IMPCOMPLETE_IMPIO)
		printf(" %s\n", incomplete[ip->il_subtype]);
	else
		printf(" subtype=%x\n", ip->il_subtype);
}

impreset(ip)
	register struct imp_leader *ip;
{
	printf("reset complete\n");
}

char *retry[] = {
	"imp buffer wasn't available",
	"connection block unavailable"
};

impretry(ip)
	register struct imp_leader *ip;
{
	printf("refused, try again: ");
	if (ip->il_subtype <= IMPRETRY_BLOCK)
		printf("%s\n", retry[ip->il_subtype]);
	else
		printf("subtype=%x\n", ip->il_subtype);
}

char *notify[] = {
	"#0",
	"#1",
	"connection not available",
	"reassembly space not available at destination",
	"message number not available",
	"transaction block for message not available"
};

impnotify(ip)
	register struct imp_leader *ip;
{
	printf("refused, will notify: ");
	if (ip->il_subtype <= 5)
		printf("%s\n", notify[ip->il_subtype]);
	else
		printf("subtype=%x\n", ip->il_subtype);
}

imptrying(ip)
	register struct imp_leader *ip;
{
	printf("refused, still trying\n");
}

impready(ip)
	register struct imp_leader *ip;
{
	printf("ready\n");
}

impundef(ip, len)
	register struct imp_leader *ip;
{
	printf("<fmt=%x, net=%x, flags=%x, mtype=", ip->il_format,
		ip->il_network, ip->il_flags);
	printf("%x, htype=%x,\n\t host=%d(x%x), imp=%d(x%x), link=",
		ip->il_mtype, ip->il_htype, ip->il_host, ip->il_host,
		ip->il_imp, ip->il_imp);
	if (ip->il_link == IMPLINK_IP)
		printf("ip,");
	else
		printf("%d (x%x),", ip->il_link, ip->il_link);
	printf(" subtype=%x", ip->il_subtype);
	if (len >= sizeof(struct imp_leader) && ip->il_length)
		printf(" len=%d bytes", ntohs((u_short)ip->il_length) >> 3);
	printf(">\n");
}