diff options
Diffstat (limited to 'usr.sbin/tcpdump/print-stp.c')
| -rw-r--r-- | usr.sbin/tcpdump/print-stp.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/usr.sbin/tcpdump/print-stp.c b/usr.sbin/tcpdump/print-stp.c new file mode 100644 index 00000000000..c038ae761c5 --- /dev/null +++ b/usr.sbin/tcpdump/print-stp.c @@ -0,0 +1,235 @@ +/* $OpenBSD: print-stp.c,v 1.1 2000/10/19 16:31:42 jason Exp $ */ + +/* + * Copyright (c) 2000 Jason L. Wright (jason@thought.net) + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Jason L. Wright + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Pretty print 802.1D Bridge Protocol Data Units + */ + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/socket.h> +#include <sys/file.h> +#include <sys/ioctl.h> + +#ifdef __STDC__ +struct mbuf; +struct rtentry; +#endif +#include <net/if.h> + +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> + +#include <netipx/ipx.h> +#include <netipx/ipx_if.h> + +#include <ctype.h> +#include <netdb.h> +#include <pcap.h> +#include <signal.h> +#include <stdio.h> + +#include <netinet/if_ether.h> +#include "ethertype.h" + +#include <net/ppp_defs.h> +#include "interface.h" +#include "addrtoname.h" +#include "extract.h" +#include "llc.h" + +#define STP_MSGTYPE_CBPDU 0x00 +#define STP_MSGTYPE_TBPDU 0x80 + +#define STP_FLAGS_TC 0x01 /* Topology change */ +#define STP_FLAGS_TCA 0x80 /* Topology change ack */ + +static void stp_print_cbpdu(const u_char *, u_int); +static void stp_print_tbpdu(const u_char *, u_int); + +void +stp_print(p, len) + const u_char *p; + u_int len; +{ + u_int16_t id; + + if (len < 3) + goto truncated; + if (p[0] != LLCSAP_8021D || p[1] != LLCSAP_8021D || p[2] != LLC_UI) { + printf("invalid protocol"); + return; + } + printf("802.1d"); + p += 3; + len -= 3; + + if (len < 3) + goto truncated; + id = EXTRACT_16BITS(p); + if (id != 0) { + printf(" unknown protocol id(0x%x)", id); + return; + } + if (p[2] != 0) { + printf(" unknown protocol ver(0x%x)", p[2]); + return; + } + p += 3; + len -= 3; + + if (len < 1) + goto truncated; + switch (*p) { + case STP_MSGTYPE_CBPDU: + stp_print_cbpdu(p, len); + break; + case STP_MSGTYPE_TBPDU: + stp_print_tbpdu(p, len); + break; + default: + printf(" unknown message (0x%02x)", *p); + break; + } + + return; + +truncated: + printf("[|802.1d]"); +} + +static void +stp_print_cbpdu(p, len) + const u_char *p; + u_int len; +{ + u_int32_t cost; + u_int16_t t; + int x; + + p += 1; + len -= 1; + + printf(" config"); + + if (len < 1) + goto truncated; + if (*p) { + x = 0; + + printf(" flags=0x%x<", *p); + if ((*p) & STP_FLAGS_TC) + printf("%stc", (x++ != 0) ? "," : ""); + if ((*p) & STP_FLAGS_TCA) + printf("%stcack", (x++ != 0) ? "," : ""); + putchar('>'); + } + p += 1; + len -= 1; + + if (len < 8) + goto truncated; + printf(" root="); + printf("%x.", EXTRACT_16BITS(p)); + p += 2; + len -= 2; + for (x = 0; x < 6; x++) { + printf("%s%x", (x != 0) ? ":" : "", *p); + p++; + len--; + } + + if (len < 4) + goto truncated; + cost = EXTRACT_32BITS(p); + printf(" rootcost=0x%x", cost); + p += 4; + len -= 4; + + if (len < 8) + goto truncated; + printf(" bridge="); + printf("%x.", EXTRACT_16BITS(p)); + p += 2; + len -= 2; + for (x = 0; x < 6; x++) { + printf("%s%x", (x != 0) ? ":" : "", *p); + p++; + len--; + } + + if (len < 2) + goto truncated; + t = EXTRACT_16BITS(p); + printf(" port=0x%x", t); + p += 2; + len -= 2; + + if (len < 2) + goto truncated; + printf(" age=%u/%u", p[0], p[1]); + p += 2; + len -= 2; + + if (len < 2) + goto truncated; + printf(" max=%u/%u", p[0], p[1]); + p += 2; + len -= 2; + + if (len < 2) + goto truncated; + printf(" hello=%u/%u", p[0], p[1]); + p += 2; + len -= 2; + + if (len < 2) + goto truncated; + printf(" fwdelay=%u/%u", p[0], p[1]); + p += 2; + len -= 2; + + return; + +truncated: + printf("[|802.1d]"); +} + +static void +stp_print_tbpdu(p, len) + const u_char *p; + u_int len; +{ + printf(" tcn"); +} |