diff options
Diffstat (limited to 'contrib/tcpdump/print-token.c')
| -rw-r--r-- | contrib/tcpdump/print-token.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-token.c b/contrib/tcpdump/print-token.c new file mode 100644 index 0000000..e1dff5b --- /dev/null +++ b/contrib/tcpdump/print-token.c @@ -0,0 +1,165 @@ +/* + * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may 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 + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * Hacked version of print-ether.c Larry Lile <lile@stdio.com> + */ +#ifndef lint +static const char rcsid[] = + "@(#) $Header$"; +#endif + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/socket.h> + +#if __STDC__ +struct mbuf; +struct rtentry; +#endif +#include <net/if.h> + +#include "token.h" + +#include <netinet/in.h> +#include <net/ethernet.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <netinet/ip_var.h> +#include <netinet/udp.h> +#include <netinet/udp_var.h> +#include <netinet/tcp.h> +#include <netinet/tcpip.h> + +#include <stdio.h> +#include <pcap.h> + +#include "interface.h" +#include "addrtoname.h" +#include "ethertype.h" +#include "llc.h" + +const u_char *packetp; +const u_char *snapend; + +static inline void +token_print(register const u_char *bp, u_int length) +{ + register const struct token_header *tp; + register const struct llc *lp; + u_short ether_type; + + tp = (const struct token_header *)bp; + lp = (struct llc *)(bp + TOKEN_HDR_LEN); + if (IS_SOURCE_ROUTED) + lp = (struct llc *)(bp + TOKEN_HDR_LEN + RIF_LENGTH); + + /* + * Ethertype on ethernet is a short, but ethertype in an llc-snap has + * been defined as 2 u_chars. This is a stupid little hack to fix + * this for now but something better should be done using ntohs() + * XXX + */ + ether_type = ((u_short)lp->ethertype[1] << 16) | lp->ethertype[0]; + + if (qflag) + (void)printf("%s %s %d: ", + etheraddr_string(ESRC(tp)), + etheraddr_string(EDST(tp)), + length); + else + (void)printf("%s %s %s %d: ", + etheraddr_string(ESRC(tp)), + etheraddr_string(EDST(tp)), + etherproto_string(ether_type), + length); +} + +/* + * This is the top level routine of the printer. 'p' is the points + * to the ether header of the packet, 'tvp' is the timestamp, + * 'length' is the length of the packet off the wire, and 'caplen' + * is the number of bytes actually captured. + */ +void +token_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) +{ + u_int caplen = h->caplen; + u_int length = h->len; + struct token_header *tp; + u_short ether_type; + extern u_short extracted_ethertype; + u_int route_len = 0; + struct llc *lp; + + tp = (struct token_header *)p; + + ts_print(&h->ts); + + if (caplen < TOKEN_HDR_LEN) { + printf("[|token-ring]"); + goto out; + } + + if (eflag) + token_print(p, length); + + /* + * Some printers want to get back at the ethernet addresses, + * and/or check that they're not walking off the end of the packet. + * Rather than pass them all the way down, we set these globals. + */ + tp = (struct token_header *)p; + + /* Adjust for source routing information in the MAC header */ + if (IS_SOURCE_ROUTED) { + route_len = RIF_LENGTH; + } + + /* Set pointer to llc header, adjusted for routing information */ + lp = (struct llc *)(p + TOKEN_HDR_LEN + route_len); + + packetp = p; + snapend = p + caplen; + + /* Skip over token ring MAC header */ + length -= TOKEN_HDR_LEN + route_len; + caplen -= TOKEN_HDR_LEN + route_len; + p += TOKEN_HDR_LEN + route_len; + + ether_type = ntohs((int)lp->ethertype); + + extracted_ethertype = 0; + /* Try to print the LLC-layer header & higher layers */ + if (llc_print(p, length, caplen, ESRC(tp), EDST(tp)) == 0) { + /* ether_type not known, print raw packet */ + if (!eflag) + token_print((u_char *)tp, length); + if (extracted_ethertype) { + printf("(LLC %s) ", + etherproto_string(htons(extracted_ethertype))); + } + if (!xflag && !qflag) + default_print(p, caplen); + } + if (xflag) + default_print(p, caplen); + out: + putchar('\n'); +} |
