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loop.c

/* David Leonard, 2002. Public domain. */
/* $Id: loop.c 1172 2006-11-11 13:32:14Z d $ */

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

#if STDC_HEADERS
# include <stdio.h>
# include <string.h>
#endif
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#if HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif

#include "compat.h"
#include "tag.h"
#include "flow.h"

/*
 * Used when the device's datalink type is DLT_LOOP (loopback).
 * XXX Plenty more protocols could be handled here...
 */

const char *
loop_tag(p, end)
        const char *p;
      const char *end;
{
      u_int32_t af;
      static char tag[TAGLEN];

      memcpy(&af, p, sizeof af);
      p += sizeof af;

      switch (ntohl(af)) {
      case AF_INET:
            return ip_tag(p, end);
#if HAVE_NETINET_IP6_H
      case AF_INET6:
            return ip6_tag(p, end);
#endif
      default:
            snprintf(tag, sizeof tag, "loop af 0x%04x", af);
            return tag;
      }
}

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