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Diffstat (limited to '')
| -rw-r--r-- | print-ripng.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/print-ripng.c b/print-ripng.c new file mode 100644 index 0000000..94ebf1b --- /dev/null +++ b/print-ripng.c @@ -0,0 +1,184 @@ +/* + * 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 */ + +/* specification: RFC 2080 */ + +#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 { + nd_ipv6 rip6_dest; + nd_uint16_t rip6_tag; + nd_uint8_t rip6_plen; + nd_uint8_t rip6_metric; +}; + +struct rip6 { + nd_uint8_t rip6_cmd; + nd_uint8_t rip6_vers; + nd_byte rip6_res1[2]; + struct netinfo6 rip6_nets[1]; +}; + +#define HOPCNT_INFINITY6 16 + +static int ND_IN6_IS_ADDR_UNSPECIFIED(const nd_ipv6 *addr) +{ + static const nd_ipv6 in6addr_any_val = { 0 }; /* :: */ + return (memcmp(addr, &in6addr_any_val, sizeof(*addr)) == 0); +} + +static void +rip6_entry_print(netdissect_options *ndo, + const struct netinfo6 *ni, const u_int print_metric) +{ + uint16_t tag; + uint8_t metric; + + ND_PRINT("%s/%u", GET_IP6ADDR_STRING(ni->rip6_dest), + GET_U_1(ni->rip6_plen)); + tag = GET_BE_U_2(ni->rip6_tag); + if (tag) + ND_PRINT(" [%u]", tag); + metric = GET_U_1(ni->rip6_metric); + if (metric && print_metric) + ND_PRINT(" (%u)", metric); +} + +void +ripng_print(netdissect_options *ndo, const u_char *dat, unsigned int length) +{ + const struct rip6 *rp = (const struct rip6 *)dat; + uint8_t cmd, vers; + const struct netinfo6 *ni; + unsigned int length_left; + u_int j; + + ndo->ndo_protocol = "ripng"; + vers = GET_U_1(rp->rip6_vers); + if (vers != RIP6_VERSION) { + nd_print_protocol(ndo); + ND_PRINT(" [version %u, must be %u]", vers, RIP6_VERSION); + goto invalid; + } + cmd = GET_U_1(rp->rip6_cmd); + switch (cmd) { + + case RIP6_REQUEST: + length_left = length; + if (length_left < (sizeof(struct rip6) - sizeof(struct netinfo6))) + goto invalid; + length_left -= (sizeof(struct rip6) - sizeof(struct netinfo6)); + j = length_left / sizeof(*ni); + if (j == 1) { + if (GET_U_1(rp->rip6_nets->rip6_metric) == HOPCNT_INFINITY6 + && ND_IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) { + ND_PRINT(" ripng-req dump"); + break; + } + } + if (j * sizeof(*ni) != length_left) + ND_PRINT(" ripng-req %u[%u]:", j, length); + else + ND_PRINT(" ripng-req %u:", j); + for (ni = rp->rip6_nets; length_left >= sizeof(*ni); + length_left -= sizeof(*ni), ++ni) { + if (ndo->ndo_vflag > 1) + ND_PRINT("\n\t"); + else + ND_PRINT(" "); + rip6_entry_print(ndo, ni, FALSE); + } + if (length_left != 0) + goto invalid; + break; + case RIP6_RESPONSE: + length_left = length; + if (length_left < (sizeof(struct rip6) - sizeof(struct netinfo6))) + goto invalid; + length_left -= (sizeof(struct rip6) - sizeof(struct netinfo6)); + j = length_left / sizeof(*ni); + if (j * sizeof(*ni) != length_left) + ND_PRINT(" ripng-resp %u[%u]:", j, length); + else + ND_PRINT(" ripng-resp %u:", j); + for (ni = rp->rip6_nets; length_left >= sizeof(*ni); + length_left -= sizeof(*ni), ++ni) { + if (ndo->ndo_vflag > 1) + ND_PRINT("\n\t"); + else + ND_PRINT(" "); + rip6_entry_print(ndo, ni, TRUE); + } + if (length_left != 0) + goto invalid; + break; + default: + ND_PRINT(" ripng-%u ?? %u", cmd, length); + goto invalid; + } + return; + +invalid: + nd_print_invalid(ndo); +} |