/*
* $Id: libnet_build_ospf.c,v 1.12 2004/11/09 07:05:07 mike Exp $
*
* libnet
* libnet_build_ospf.c - OSPF packet assembler
*
* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
* All rights reserved.
*
* Copyright (c) 1999, 2000 Andrew Reiter <areiter@bindview.com>
* Bindview Development
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*/
#if (HAVE_CONFIG_H)
#include "../include/config.h"
#endif
#if (!(_WIN32) || (__CYGWIN__))
#include "../include/libnet.h"
#else
#include "../include/win32/libnet.h"
#endif
libnet_ptag_t
libnet_build_ospfv2(uint16_t len, uint8_t type, uint32_t rtr_id,
uint32_t area_id, uint16_t sum, uint16_t autype, const uint8_t *payload,
uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_ospf_hdr ospf_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_H + payload_s;
h = LIBNET_OSPF_H + payload_s + len;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_H);
if (p == NULL)
{
return (-1);
}
memset(&ospf_hdr, 0, sizeof(ospf_hdr));
ospf_hdr.ospf_v = 2; /* OSPF version 2 */
ospf_hdr.ospf_type = type; /* Type of pkt */
ospf_hdr.ospf_len = htons(h); /* Pkt len */
ospf_hdr.ospf_rtr_id.s_addr = rtr_id; /* Router ID */
ospf_hdr.ospf_area_id.s_addr = area_id; /* Area ID */
ospf_hdr.ospf_sum = sum;
ospf_hdr.ospf_auth_type = htons(autype); /* Type of auth */
n = libnet_pblock_append(l, p, (uint8_t *)&ospf_hdr, LIBNET_OSPF_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
if (sum == 0)
{
/*
* If checksum is zero, by default libnet will compute a checksum
* for the user. The programmer can override this by calling
* libnet_toggle_checksum(l, ptag, 1);
*/
libnet_pblock_setflags(p, LIBNET_PBLOCK_DO_CHECKSUM);
}
return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_OSPF_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_hello(uint32_t netmask, uint16_t interval, uint8_t opts,
uint8_t priority, uint32_t dead_int, uint32_t des_rtr, uint32_t bkup_rtr,
const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_ospf_hello_hdr hello_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_HELLO_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_HELLO_H);
if (p == NULL)
{
return (-1);
}
memset(&hello_hdr, 0, sizeof(hello_hdr));
hello_hdr.hello_nmask.s_addr = netmask; /* Netmask */
hello_hdr.hello_intrvl = htons(interval); /* # seconds since last packet sent */
hello_hdr.hello_opts = opts; /* OSPF_* options */
hello_hdr.hello_rtr_pri = priority; /* If 0, can't be backup */
hello_hdr.hello_dead_intvl = htonl(dead_int); /* Time til router is deemed down */
hello_hdr.hello_des_rtr.s_addr = des_rtr; /* Networks designated router */
hello_hdr.hello_bkup_rtr.s_addr = bkup_rtr; /* Networks backup router */
/*hello_hdr.hello_nbr.s_addr = htonl(neighbor); */
n = libnet_pblock_append(l, p, (uint8_t *)&hello_hdr, LIBNET_OSPF_HELLO_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_OSPF_HELLO_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_dbd(uint16_t dgram_len, uint8_t opts, uint8_t type,
uint32_t seqnum, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_dbd_hdr dbd_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_DBD_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_DBD_H);
if (p == NULL)
{
return (-1);
}
memset(&dbd_hdr, 0, sizeof(dbd_hdr));
dbd_hdr.dbd_mtu_len = htons(dgram_len); /* Max length of IP packet IF can use */
dbd_hdr.dbd_opts = opts; /* OSPF_* options */
dbd_hdr.dbd_type = type; /* Type of exchange occuring */
dbd_hdr.dbd_seq = htonl(seqnum); /* DBD sequence number */
n = libnet_pblock_append(l, p, (uint8_t *)&dbd_hdr, LIBNET_OSPF_DBD_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_OSPF_DBD_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_lsr(uint32_t type, uint lsid, uint32_t advrtr,
const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_lsr_hdr lsr_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_LSR_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_LSR_H);
if (p == NULL)
{
return (-1);
}
memset(&lsr_hdr, 0, sizeof(lsr_hdr));
lsr_hdr.lsr_type = htonl(type); /* Type of LS being requested */
lsr_hdr.lsr_lsid = htonl(lsid); /* Link State ID */
lsr_hdr.lsr_adrtr.s_addr = htonl(advrtr); /* Advertising router */
n = libnet_pblock_append(l, p, (uint8_t *)&lsr_hdr, LIBNET_OSPF_LSR_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_OSPF_LSR_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_lsu(uint32_t num, const uint8_t *payload, uint32_t payload_s,
libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_lsu_hdr lh_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_LSU_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_LSU_H);
if (p == NULL)
{
return (-1);
}
memset(&lh_hdr, 0, sizeof(lh_hdr));
lh_hdr.lsu_num = htonl(num); /* Number of LSAs that will be bcasted */
n = libnet_pblock_append(l, p, (uint8_t *)&lh_hdr, LIBNET_OSPF_LSU_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_OSPF_LSU_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_lsa(uint16_t age, uint8_t opts, uint8_t type, uint lsid,
uint32_t advrtr, uint32_t seqnum, uint16_t sum, uint16_t len,
const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_lsa_hdr lsa_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_LSA_H + payload_s;
h = len + payload_s;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_LSA_H);
if (p == NULL)
{
return (-1);
}
memset(&lsa_hdr, 0, sizeof(lsa_hdr));
lsa_hdr.lsa_age = htons(age);
lsa_hdr.lsa_opts = opts;
lsa_hdr.lsa_type = type;
lsa_hdr.lsa_id = htonl(lsid);
lsa_hdr.lsa_adv.s_addr = htonl(advrtr);
lsa_hdr.lsa_seq = htonl(seqnum);
lsa_hdr.lsa_sum = sum;
lsa_hdr.lsa_len = htons(h);
n = libnet_pblock_append(l, p, (uint8_t *)&lsa_hdr, LIBNET_OSPF_LSA_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
if (sum == 0)
{
/*
* If checksum is zero, by default libnet will compute a checksum
* for the user. The programmer can override this by calling
* libnet_toggle_checksum(l, ptag, 1);
*/
libnet_pblock_setflags(p, LIBNET_PBLOCK_DO_CHECKSUM);
}
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_OSPF_LSA_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_lsa_rtr(uint16_t flags, uint16_t num, uint32_t id,
uint32_t data, uint8_t type, uint8_t tos, uint16_t metric,
const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_rtr_lsa_hdr rtr_lsa_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_LS_RTR_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_LS_RTR_H);
if (p == NULL)
{
return (-1);
}
memset(&rtr_lsa_hdr, 0, sizeof(rtr_lsa_hdr));
rtr_lsa_hdr.rtr_flags = htons(flags);
rtr_lsa_hdr.rtr_num = htons(num);
rtr_lsa_hdr.rtr_link_id = htonl(id);
rtr_lsa_hdr.rtr_link_data = htonl(data);
rtr_lsa_hdr.rtr_type = type;
rtr_lsa_hdr.rtr_tos_num = tos;
rtr_lsa_hdr.rtr_metric = htons(metric);
n = libnet_pblock_append(l, p, (uint8_t *)&rtr_lsa_hdr,
LIBNET_OSPF_LS_RTR_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_LS_RTR_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_lsa_net(uint32_t nmask, uint32_t rtrid,
const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_net_lsa_hdr net_lsa_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_LS_NET_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_LS_NET_H);
if (p == NULL)
{
return (-1);
}
memset(&net_lsa_hdr, 0, sizeof(net_lsa_hdr));
net_lsa_hdr.net_nmask.s_addr = htonl(nmask);
net_lsa_hdr.net_rtr_id = htonl(rtrid);
n = libnet_pblock_append(l, p, (uint8_t *)&net_lsa_hdr,
LIBNET_OSPF_LS_NET_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_LS_NET_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_lsa_sum(uint32_t nmask, uint32_t metric, uint tos,
const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_sum_lsa_hdr sum_lsa_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_LS_SUM_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_LS_SUM_H);
if (p == NULL)
{
return (-1);
}
memset(&sum_lsa_hdr, 0, sizeof(sum_lsa_hdr));
sum_lsa_hdr.sum_nmask.s_addr = htonl(nmask);
sum_lsa_hdr.sum_metric = htonl(metric);
sum_lsa_hdr.sum_tos_metric = htonl(tos);
n = libnet_pblock_append(l, p, (uint8_t *)&sum_lsa_hdr,
LIBNET_OSPF_LS_SUM_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_LS_SUM_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
libnet_ptag_t
libnet_build_ospfv2_lsa_as(uint32_t nmask, uint metric, uint32_t fwdaddr,
uint32_t tag, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
libnet_ptag_t ptag)
{
uint32_t n, h;
libnet_pblock_t *p;
struct libnet_as_lsa_hdr as_lsa_hdr;
if (l == NULL)
{
return (-1);
}
n = LIBNET_OSPF_LS_AS_EXT_H + payload_s;
h = 0;
/*
* Find the existing protocol block if a ptag is specified, or create
* a new one.
*/
p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_LS_AS_EXT_H);
if (p == NULL)
{
return (-1);
}
memset(&as_lsa_hdr, 0, sizeof(as_lsa_hdr));
as_lsa_hdr.as_nmask.s_addr = htonl(nmask);
as_lsa_hdr.as_metric = htonl(metric);
as_lsa_hdr.as_fwd_addr.s_addr = htonl(fwdaddr);
as_lsa_hdr.as_rte_tag = htonl(tag);
n = libnet_pblock_append(l, p, (uint8_t *)&as_lsa_hdr,
LIBNET_OSPF_LS_AS_EXT_H);
if (n == -1)
{
goto bad;
}
/* boilerplate payload sanity check / append macro */
LIBNET_DO_PAYLOAD(l, p);
return (ptag ? ptag : libnet_pblock_update(l, p, h,
LIBNET_PBLOCK_LS_AS_EXT_H));
bad:
libnet_pblock_delete(l, p);
return (-1);
}
/* EOF */