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Annotation of embedaddon/libnet/src/libnet_build_rip.c, revision 1.1.1.3

1.1       misho       1: /*
1.1.1.2   misho       2:  *  $Id: libnet_build_rip.c,v 1.9 2004/04/13 17:32:28 mike Exp $
1.1       misho       3:  *
                      4:  *  libnet
                      5:  *  libnet_build_rip.c - RIP packet assembler
                      6:  *
                      7:  *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
                      8:  *  All rights reserved.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  *
                     31:  */
                     32: 
1.1.1.3 ! misho      33: #include "common.h"
1.1       misho      34: 
                     35: libnet_ptag_t
1.1.1.2   misho      36: libnet_build_rip(uint8_t cmd, uint8_t version, uint16_t rd, uint16_t af,
                     37: uint16_t rt, uint32_t addr, uint32_t mask, uint32_t next_hop,
                     38: uint32_t metric, const uint8_t *payload, uint32_t payload_s, libnet_t *l,
                     39: libnet_ptag_t ptag)
1.1       misho      40: {
1.1.1.2   misho      41:     uint32_t n, h;
1.1       misho      42:     libnet_pblock_t *p;
                     43:     struct libnet_rip_hdr rip_hdr;
                     44: 
                     45:     if (l == NULL)
                     46:     { 
                     47:         return (-1);
                     48:     } 
                     49: 
                     50:     n = LIBNET_RIP_H + payload_s;
                     51:     h = 0;
                     52: 
                     53:     /*
                     54:      *  Find the existing protocol block if a ptag is specified, or create
                     55:      *  a new one.
                     56:      */
                     57:     p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_RIP_H);
                     58:     if (p == NULL)
                     59:     {
                     60:         return (-1);
                     61:     }
                     62: 
1.1.1.2   misho      63:     memset(&rip_hdr, 0, sizeof(rip_hdr));
                     64:     rip_hdr.rip_cmd      = cmd;
1.1       misho      65:     rip_hdr.rip_ver      = version;
                     66:     rip_hdr.rip_rd       = htons(rd);
                     67:     rip_hdr.rip_af       = htons(af);
                     68:     rip_hdr.rip_rt       = htons(rt);
1.1.1.2   misho      69:     rip_hdr.rip_addr     = addr;
                     70:     rip_hdr.rip_mask     = mask;
                     71:     rip_hdr.rip_next_hop = next_hop;
1.1       misho      72:     rip_hdr.rip_metric   = htonl(metric);
                     73: 
1.1.1.2   misho      74:     n = libnet_pblock_append(l, p, (uint8_t *)&rip_hdr, LIBNET_RIP_H);
1.1       misho      75:     if (n == -1)
                     76:     {
                     77:         goto bad;
                     78:     }
                     79: 
1.1.1.2   misho      80:     /* boilerplate payload sanity check / append macro */
                     81:     LIBNET_DO_PAYLOAD(l, p);
1.1       misho      82: 
                     83:     return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_RIP_H));
                     84: bad:
                     85:     libnet_pblock_delete(l, p);
                     86:     return (-1);
                     87: }
                     88: 
1.1.1.3 ! misho      89: /**
        !            90:  * Local Variables:
        !            91:  *  indent-tabs-mode: nil
        !            92:  *  c-file-style: "stroustrup"
        !            93:  * End:
        !            94:  */