print-ipnet.c

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <tcpdump-stdinc.h>

#include <stdio.h>
#include <pcap.h>

#include "interface.h"
#include "addrtoname.h"
#include "ipnet.h"

#ifdef DLT_IPNET

int ipnet_encap_print(u_short, const u_char *, u_int, u_int);

const struct tok ipnet_values[] = {
	{ IPH_AF_INET,		"IPv4" },
	{ IPH_AF_INET6,		"IPv6" },
	{ 0,			NULL }
};

static inline void
ipnet_hdr_print(register const u_char *bp, u_int length)
{
	const ipnet_hdr_t *hdr;
	hdr = (const ipnet_hdr_t *)bp;

	(void)printf("%d > %d", hdr->iph_zsrc, hdr->iph_zdst);

	if (!qflag) {
		(void)printf(", family %s (%d)",
			     tok2str(ipnet_values, "Unknown",
				     hdr->iph_family),
			      hdr->iph_family);
        } else {
		(void)printf(", %s",
			     tok2str(ipnet_values,
				     "Unknown Ethertype (0x%04x)",
				     hdr->iph_family));
        }

	(void)printf(", length %u: ", length);
}

void
ipnet_print(const u_char *p, u_int length, u_int caplen)
{
	ipnet_hdr_t *hdr;

	if (caplen < sizeof(ipnet_hdr_t)) {
		printf("[|ipnet]");
		return;
	}

	if (eflag)
		ipnet_hdr_print(p, length);

	length -= sizeof(ipnet_hdr_t);
	caplen -= sizeof(ipnet_hdr_t);
	hdr = (ipnet_hdr_t *)p;
	p += sizeof(ipnet_hdr_t);

	if (ipnet_encap_print(hdr->iph_family, p, length, caplen) == 0) {
		if (!eflag)
			ipnet_hdr_print((u_char *)hdr,
					length + sizeof(ipnet_hdr_t));

		if (!suppress_default_print)
			default_print(p, caplen);
	} 
}

/*
 * This is the top level routine of the printer.  'p' points
 * to the ether header of the packet, 'h->ts' is the timestamp,
 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 * is the number of bytes actually captured.
 */
u_int
ipnet_if_print(const struct pcap_pkthdr *h, const u_char *p)
{
	ipnet_print(p, h->len, h->caplen);

	return (sizeof(ipnet_hdr_t));
}

/*
 * Prints the packet encapsulated in an Ethernet data segment
 * (or an equivalent encapsulation), given the Ethernet type code.
 *
 * Returns non-zero if it can do so, zero if the ethertype is unknown.
 *
 * The Ethernet type code is passed through a pointer; if it was
 * ETHERTYPE_8021Q, it gets updated to be the Ethernet type of
 * the 802.1Q payload, for the benefit of lower layers that might
 * want to know what it is.
 */

int
ipnet_encap_print(u_short family, const u_char *p,
    u_int length, u_int caplen)
{
 recurse:

	switch (family) {

	case IPH_AF_INET:
	        ip_print(gndo, p, length);
		return (1);

#ifdef INET6
	case IPH_AF_INET6:
		ip6_print(p, length);
		return (1);
#endif /*INET6*/

	default:
		return(0);
	}
}


/*
 * Local Variables:
 * c-style: whitesmith
 * c-basic-offset: 8
 * End:
 */

#endif /* DLT_IPNET */