diff options
Diffstat (limited to 'print-ripng.c')
| -rw-r--r-- | print-ripng.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/print-ripng.c b/print-ripng.c new file mode 100644 index 000000000000..25e9bbca085d --- /dev/null +++ b/print-ripng.c @@ -0,0 +1,174 @@ +/* + * Copyright (c) 1989, 1990, 1991, 1993, 1994 + * 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. + */ + +/* \summary: IPv6 Routing Information Protocol (RIPng) printer */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <netdissect-stdinc.h> + +#include "netdissect.h" +#include "addrtoname.h" +#include "extract.h" + +/* + * Copyright (C) 1995, 1996, 1997 and 1998 WIDE Project. + * 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. Neither the name of the project 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 BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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. + */ +#define RIP6_VERSION 1 + +#define RIP6_REQUEST 1 +#define RIP6_RESPONSE 2 + +struct netinfo6 { + struct in6_addr rip6_dest; + uint16_t rip6_tag; + uint8_t rip6_plen; + uint8_t rip6_metric; +}; + +struct rip6 { + uint8_t rip6_cmd; + uint8_t rip6_vers; + uint8_t rip6_res1[2]; + union { + struct netinfo6 ru6_nets[1]; + char ru6_tracefile[1]; + } rip6un; +#define rip6_nets rip6un.ru6_nets +#define rip6_tracefile rip6un.ru6_tracefile +}; + +#define HOPCNT_INFINITY6 16 + +#if !defined(IN6_IS_ADDR_UNSPECIFIED) && !defined(_MSC_VER) /* MSVC inline */ +static int IN6_IS_ADDR_UNSPECIFIED(const struct in6_addr *addr) +{ + static const struct in6_addr in6addr_any; /* :: */ + return (memcmp(addr, &in6addr_any, sizeof(*addr)) == 0); +} +#endif + +static int +rip6_entry_print(netdissect_options *ndo, register const struct netinfo6 *ni, int metric) +{ + int l; + l = ND_PRINT((ndo, "%s/%d", ip6addr_string(ndo, &ni->rip6_dest), ni->rip6_plen)); + if (ni->rip6_tag) + l += ND_PRINT((ndo, " [%d]", EXTRACT_16BITS(&ni->rip6_tag))); + if (metric) + l += ND_PRINT((ndo, " (%d)", ni->rip6_metric)); + return l; +} + +void +ripng_print(netdissect_options *ndo, const u_char *dat, unsigned int length) +{ + register const struct rip6 *rp = (const struct rip6 *)dat; + register const struct netinfo6 *ni; + register u_int amt; + register u_int i; + int j; + int trunc; + + if (ndo->ndo_snapend < dat) + return; + amt = ndo->ndo_snapend - dat; + i = min(length, amt); + if (i < (sizeof(struct rip6) - sizeof(struct netinfo6))) + return; + i -= (sizeof(struct rip6) - sizeof(struct netinfo6)); + + switch (rp->rip6_cmd) { + + case RIP6_REQUEST: + j = length / sizeof(*ni); + if (j == 1 + && rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6 + && IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) { + ND_PRINT((ndo, " ripng-req dump")); + break; + } + if (j * sizeof(*ni) != length - 4) + ND_PRINT((ndo, " ripng-req %d[%u]:", j, length)); + else + ND_PRINT((ndo, " ripng-req %d:", j)); + trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); + for (ni = rp->rip6_nets; i >= sizeof(*ni); + i -= sizeof(*ni), ++ni) { + if (ndo->ndo_vflag > 1) + ND_PRINT((ndo, "\n\t")); + else + ND_PRINT((ndo, " ")); + rip6_entry_print(ndo, ni, 0); + } + break; + case RIP6_RESPONSE: + j = length / sizeof(*ni); + if (j * sizeof(*ni) != length - 4) + ND_PRINT((ndo, " ripng-resp %d[%u]:", j, length)); + else + ND_PRINT((ndo, " ripng-resp %d:", j)); + trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); + for (ni = rp->rip6_nets; i >= sizeof(*ni); + i -= sizeof(*ni), ++ni) { + if (ndo->ndo_vflag > 1) + ND_PRINT((ndo, "\n\t")); + else + ND_PRINT((ndo, " ")); + rip6_entry_print(ndo, ni, ni->rip6_metric); + } + if (trunc) + ND_PRINT((ndo, "[|ripng]")); + break; + default: + ND_PRINT((ndo, " ripng-%d ?? %u", rp->rip6_cmd, length)); + break; + } + if (rp->rip6_vers != RIP6_VERSION) + ND_PRINT((ndo, " [vers %d]", rp->rip6_vers)); +} |