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Diffstat (limited to 'usr.sbin/tcpdump/print-egp.c')
-rw-r--r--usr.sbin/tcpdump/print-egp.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/usr.sbin/tcpdump/print-egp.c b/usr.sbin/tcpdump/print-egp.c
new file mode 100644
index 00000000000..97fc2c3818f
--- /dev/null
+++ b/usr.sbin/tcpdump/print-egp.c
@@ -0,0 +1,358 @@
+/* $NetBSD: print-egp.c,v 1.2 1995/03/06 19:11:09 mycroft Exp $ */
+
+/*
+ * Copyright (c) 1991, 1992, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Lawrence Berkeley Laboratory,
+ * Berkeley, CA. The name of the University may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Initial contribution from Jeff Honig (jch@MITCHELL.CIT.CORNELL.EDU).
+ */
+
+#ifndef lint
+static char rcsid[] =
+ "@(#) Header: print-egp.c,v 1.14 94/06/20 19:44:38 leres Exp (LBL)";
+#endif
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+
+#include <netdb.h>
+#include <stdio.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+
+struct egp_packet {
+ u_char egp_version;
+#define EGP_VERSION 2
+ u_char egp_type;
+#define EGPT_ACQUIRE 3
+#define EGPT_REACH 5
+#define EGPT_POLL 2
+#define EGPT_UPDATE 1
+#define EGPT_ERROR 8
+ u_char egp_code;
+#define EGPC_REQUEST 0
+#define EGPC_CONFIRM 1
+#define EGPC_REFUSE 2
+#define EGPC_CEASE 3
+#define EGPC_CEASEACK 4
+#define EGPC_HELLO 0
+#define EGPC_HEARDU 1
+ u_char egp_status;
+#define EGPS_UNSPEC 0
+#define EGPS_ACTIVE 1
+#define EGPS_PASSIVE 2
+#define EGPS_NORES 3
+#define EGPS_ADMIN 4
+#define EGPS_GODOWN 5
+#define EGPS_PARAM 6
+#define EGPS_PROTO 7
+#define EGPS_INDET 0
+#define EGPS_UP 1
+#define EGPS_DOWN 2
+#define EGPS_UNSOL 0x80
+ u_short egp_checksum;
+ u_short egp_as;
+ u_short egp_sequence;
+ union {
+ u_short egpu_hello;
+ u_char egpu_gws[2];
+ u_short egpu_reason;
+#define EGPR_UNSPEC 0
+#define EGPR_BADHEAD 1
+#define EGPR_BADDATA 2
+#define EGPR_NOREACH 3
+#define EGPR_XSPOLL 4
+#define EGPR_NORESP 5
+#define EGPR_UVERSION 6
+ } egp_handg;
+#define egp_hello egp_handg.egpu_hello
+#define egp_intgw egp_handg.egpu_gws[0]
+#define egp_extgw egp_handg.egpu_gws[1]
+#define egp_reason egp_handg.egpu_reason
+ union {
+ u_short egpu_poll;
+ u_int32 egpu_sourcenet;
+ } egp_pands;
+#define egp_poll egp_pands.egpu_poll
+#define egp_sourcenet egp_pands.egpu_sourcenet
+};
+
+char *egp_acquire_codes[] = {
+ "request",
+ "confirm",
+ "refuse",
+ "cease",
+ "cease_ack"
+};
+
+char *egp_acquire_status[] = {
+ "unspecified",
+ "active_mode",
+ "passive_mode",
+ "insufficient_resources",
+ "administratively_prohibited",
+ "going_down",
+ "parameter_violation",
+ "protocol_violation"
+};
+
+char *egp_reach_codes[] = {
+ "hello",
+ "i-h-u"
+};
+
+char *egp_status_updown[] = {
+ "indeterminate",
+ "up",
+ "down"
+};
+
+char *egp_reasons[] = {
+ "unspecified",
+ "bad_EGP_header_format",
+ "bad_EGP_data_field_format",
+ "reachability_info_unavailable",
+ "excessive_polling_rate",
+ "no_response",
+ "unsupported_version"
+};
+
+static void
+egpnrprint(register const struct egp_packet *egp, register int length)
+{
+ register const u_char *cp, *ep;
+#define TCHECK(n) if (cp > ep - n) goto trunc
+ register u_int32 addr;
+ register u_int32 net;
+ register int netlen;
+ int gateways, distances, networks;
+ int t_gateways;
+ char *comma;
+
+ addr = egp->egp_sourcenet;
+ if (IN_CLASSA(addr)) {
+ net = addr & IN_CLASSA_NET;
+ netlen = 1;
+ } else if (IN_CLASSB(addr)) {
+ net = addr & IN_CLASSB_NET;
+ netlen = 2;
+ } else if (IN_CLASSC(addr)) {
+ net = addr & IN_CLASSC_NET;
+ netlen = 3;
+ } else {
+ net = 0;
+ netlen = 0;
+ }
+ cp = (u_char *)(egp + 1);
+ ep = snapend;
+
+ t_gateways = egp->egp_intgw + egp->egp_extgw;
+ for (gateways = 0; gateways < t_gateways; ++gateways) {
+ /* Pickup host part of gateway address */
+ addr = 0;
+ TCHECK(4 - netlen);
+ switch (netlen) {
+
+ case 1:
+ addr = *cp++;
+ /* fall through */
+ case 2:
+ addr = (addr << 8) | *cp++;
+ /* fall through */
+ case 3:
+ addr = (addr << 8) | *cp++;
+ }
+ addr |= net;
+ TCHECK(1);
+ distances = *cp++;
+ printf(" %s %s ",
+ gateways < egp->egp_intgw ? "int" : "ext",
+ intoa(addr));
+
+ comma = "";
+ putchar('(');
+ while (--distances >= 0) {
+ TCHECK(2);
+ printf("%sd%d:", comma, (int)*cp++);
+ comma = ", ";
+ networks = *cp++;
+ while (--networks >= 0) {
+ /* Pickup network number */
+ TCHECK(1);
+ addr = (u_int32)*cp++ << 24;
+ if (IN_CLASSB(addr)) {
+ TCHECK(1);
+ addr |= (u_int32)*cp++ << 16;
+ } else if (!IN_CLASSA(addr)) {
+ TCHECK(2);
+ addr |= (u_int32)*cp++ << 16;
+ addr |= (u_int32)*cp++ << 8;
+ }
+ printf(" %s", intoa(addr));
+ }
+ }
+ putchar(')');
+ }
+ return;
+trunc:
+ fputs("[|]", stdout);
+}
+
+void
+egp_print(register const u_char *bp, register int length,
+ register const u_char *bp2)
+{
+ register const struct egp_packet *egp;
+ register const struct ip *ip;
+ register int status;
+ register int code;
+ register int type;
+
+ egp = (struct egp_packet *)bp;
+ ip = (struct ip *)bp2;
+ (void)printf("%s > %s: egp: ",
+ ipaddr_string(&ip->ip_src),
+ ipaddr_string(&ip->ip_dst));
+
+ if (egp->egp_version != EGP_VERSION) {
+ printf("[version %d]", egp->egp_version);
+ return;
+ }
+ printf("as:%d seq:%d", ntohs(egp->egp_as), ntohs(egp->egp_sequence));
+
+ type = egp->egp_type;
+ code = egp->egp_code;
+ status = egp->egp_status;
+
+ switch (type) {
+ case EGPT_ACQUIRE:
+ printf(" acquire");
+ switch (code) {
+ case EGPC_REQUEST:
+ case EGPC_CONFIRM:
+ printf(" %s", egp_acquire_codes[code]);
+ switch (status) {
+ case EGPS_UNSPEC:
+ case EGPS_ACTIVE:
+ case EGPS_PASSIVE:
+ printf(" %s", egp_acquire_status[status]);
+ break;
+
+ default:
+ printf(" [status %d]", status);
+ break;
+ }
+ printf(" hello:%d poll:%d",
+ ntohs(egp->egp_hello),
+ ntohs(egp->egp_poll));
+ break;
+
+ case EGPC_REFUSE:
+ case EGPC_CEASE:
+ case EGPC_CEASEACK:
+ printf(" %s", egp_acquire_codes[code]);
+ switch (status ) {
+ case EGPS_UNSPEC:
+ case EGPS_NORES:
+ case EGPS_ADMIN:
+ case EGPS_GODOWN:
+ case EGPS_PARAM:
+ case EGPS_PROTO:
+ printf(" %s", egp_acquire_status[status]);
+ break;
+
+ default:
+ printf("[status %d]", status);
+ break;
+ }
+ break;
+
+ default:
+ printf("[code %d]", code);
+ break;
+ }
+ break;
+
+ case EGPT_REACH:
+ switch (code) {
+
+ case EGPC_HELLO:
+ case EGPC_HEARDU:
+ printf(" %s", egp_reach_codes[code]);
+ if (status <= EGPS_DOWN)
+ printf(" state:%s", egp_status_updown[status]);
+ else
+ printf(" [status %d]", status);
+ break;
+
+ default:
+ printf("[reach code %d]", code);
+ break;
+ }
+ break;
+
+ case EGPT_POLL:
+ printf(" poll");
+ if (egp->egp_status <= EGPS_DOWN)
+ printf(" state:%s", egp_status_updown[status]);
+ else
+ printf(" [status %d]", status);
+ printf(" net:%s", intoa(egp->egp_sourcenet));
+ break;
+
+ case EGPT_UPDATE:
+ printf(" update");
+ if (status & EGPS_UNSOL) {
+ status &= ~EGPS_UNSOL;
+ printf(" unsolicited");
+ }
+ if (status <= EGPS_DOWN)
+ printf(" state:%s", egp_status_updown[status]);
+ else
+ printf(" [status %d]", status);
+ printf(" %s int %d ext %d",
+ intoa(egp->egp_sourcenet),
+ egp->egp_intgw,
+ egp->egp_extgw);
+ if (vflag)
+ egpnrprint(egp, length);
+ break;
+
+ case EGPT_ERROR:
+ printf(" error");
+ if (status <= EGPS_DOWN)
+ printf(" state:%s", egp_status_updown[status]);
+ else
+ printf(" [status %d]", status);
+
+ if (ntohs(egp->egp_reason) <= EGPR_UVERSION)
+ printf(" %s", egp_reasons[ntohs(egp->egp_reason)]);
+ else
+ printf(" [reason %d]", ntohs(egp->egp_reason));
+ break;
+
+ default:
+ printf("[type %d]", type);
+ break;
+ }
+}
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