diff options
Diffstat (limited to 'contrib/tcpdump/print-lane.c')
| -rw-r--r-- | contrib/tcpdump/print-lane.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-lane.c b/contrib/tcpdump/print-lane.c new file mode 100644 index 0000000..19061de --- /dev/null +++ b/contrib/tcpdump/print-lane.c @@ -0,0 +1,148 @@ +/* + * Marko Kiiskila carnil@cs.tut.fi + * + * Tampere University of Technology - Telecommunications Laboratory + * + * Permission to use, copy, modify and distribute this + * software and its documentation is hereby granted, + * provided that both the copyright notice and this + * permission notice appear in all copies of the software, + * derivative works or modified versions, and any portions + * thereof, that both notices appear in supporting + * documentation, and that the use of this software is + * acknowledged in any publications resulting from using + * the software. + * + * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS + * SOFTWARE. + * + */ + +#ifndef lint +static const char rcsid[] = + "@(#) $Header: /tcpdump/master/tcpdump/print-lane.c,v 1.2 1999/11/21 09:36:56 fenner Exp $ (LBL)"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/socket.h> + +#include <net/if.h> + +#include <netinet/in.h> +#include <netinet/if_ether.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 "lane.h" + +static const u_char *packetp; +static const u_char *snapend; + +static inline void +lane_print(register const u_char *bp, int length) +{ + register const struct lecdatahdr_8023 *ep; + + ep = (const struct lecdatahdr_8023 *)bp; + if (qflag) + (void)printf("lecid:%d %s %s %d: ", + ntohs(ep->le_header), + etheraddr_string(ep->h_source), + etheraddr_string(ep->h_dest), + length); + else + (void)printf("lecid:%d %s %s %s %d: ", + ntohs(ep->le_header), + etheraddr_string(ep->h_source), + etheraddr_string(ep->h_dest), + etherproto_string(ep->h_type), + length); +} + +/* + * This is the top level routine of the printer. 'p' is the points + * to the ether header of the packet, 'h->tv' is the timestamp, + * 'h->length' is the length of the packet off the wire, and 'h->caplen' + * is the number of bytes actually captured. + */ +void +lane_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) +{ + int caplen = h->caplen; + int length = h->len; + struct lecdatahdr_8023 *ep; + u_short ether_type; + u_short extracted_ethertype; + + ts_print(&h->ts); + + if (caplen < sizeof(struct lecdatahdr_8023)) { + printf("[|lane]"); + goto out; + } + + if (eflag) + lane_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. + */ + packetp = p; + snapend = p + caplen; + + length -= sizeof(struct lecdatahdr_8023); + caplen -= sizeof(struct lecdatahdr_8023); + ep = (struct lecdatahdr_8023 *)p; + p += sizeof(struct lecdatahdr_8023); + + ether_type = ntohs(ep->h_type); + + /* + * Is it (gag) an 802.3 encapsulation? + */ + extracted_ethertype = 0; + if (ether_type < ETHERMTU) { + /* Try to print the LLC-layer header & higher layers */ + if (llc_print(p, length, caplen, ep->h_source,ep->h_dest)==0) { + /* ether_type not known, print raw packet */ + if (!eflag) + lane_print((u_char *)ep, length); + if (extracted_ethertype) { + printf("(LLC %s) ", + etherproto_string(htons(extracted_ethertype))); + } + if (!xflag && !qflag) + default_print(p, caplen); + } + } else if (ether_encap_print(ether_type, p, length, caplen) == 0) { + /* ether_type not known, print raw packet */ + if (!eflag) + lane_print((u_char *)ep, length + sizeof(*ep)); + if (!xflag && !qflag) + default_print(p, caplen); + } + if (xflag) + default_print(p, caplen); + out: + putchar('\n'); +} |
