Return to libnet_build_hsrp.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libnet / src

Annotation of embedaddon/libnet/src/libnet_build_hsrp.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  *  libnet
        !             3:  *  libnet_build_hsrp.c - HSRP packet assembler
        !             4:  *
        !             5:  *  Copyright (c) 2004 David Barroso Berrueta <tomac@wasahero.org>
        !             6:  *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
        !             7:  *  All rights reserved.
        !             8:  *
        !             9:  * Redistribution and use in source and binary forms, with or without
        !            10:  * modification, are permitted provided that the following conditions
        !            11:  * are met:
        !            12:  * 1. Redistributions of source code must retain the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer.
        !            14:  * 2. Redistributions in binary form must reproduce the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer in the
        !            16:  *    documentation and/or other materials provided with the distribution.
        !            17:  *
        !            18:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            19:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            20:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            21:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            22:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            23:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            24:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            25:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            26:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            27:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            28:  * SUCH DAMAGE.
        !            29:  *
        !            30:  */
        !            31: 
        !            32: #if (HAVE_CONFIG_H)
        !            33: #include "../include/config.h"
        !            34: #endif
        !            35: #if (!(_WIN32) || (__CYGWIN__)) 
        !            36: #include "../include/libnet.h"
        !            37: #else
        !            38: #include "../include/win32/libnet.h"
        !            39: #endif
        !            40: 
        !            41: libnet_ptag_t
        !            42: libnet_build_hsrp(uint8_t version, uint8_t opcode, uint8_t state, 
        !            43: uint8_t hello_time, uint8_t hold_time, uint8_t priority, uint8_t group,
        !            44: uint8_t reserved, uint8_t authdata[HSRP_AUTHDATA_LENGTH], uint32_t virtual_ip,
        !            45: const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
        !            46: {
        !            47:     uint32_t n;
        !            48:     libnet_pblock_t *p;
        !            49:     struct libnet_hsrp_hdr hsrp_hdr;
        !            50: 
        !            51:     if (l == NULL)
        !            52:     { 
        !            53:         return (-1);
        !            54:     } 
        !            55: 
        !            56:     /*
        !            57:      *  Find the existing protocol block if a ptag is specified, or create
        !            58:      *  a new one.
        !            59:      */
        !            60:     p = libnet_pblock_probe(l, ptag, LIBNET_HSRP_H + payload_s, LIBNET_PBLOCK_HSRP_H);
        !            61:     if (p == NULL)
        !            62:     {
        !            63:         return (-1);
        !            64:     }
        !            65: 
        !            66:     memset(&hsrp_hdr, 0, sizeof(hsrp_hdr));
        !            67:     hsrp_hdr.version = version;
        !            68:     hsrp_hdr.opcode = opcode;
        !            69:     hsrp_hdr.state = state;
        !            70:     hsrp_hdr.hello_time = hello_time;
        !            71:     hsrp_hdr.hold_time = hold_time;
        !            72:     hsrp_hdr.priority = priority;
        !            73:     hsrp_hdr.group = group;
        !            74:     hsrp_hdr.reserved = reserved;
        !            75:     memcpy(hsrp_hdr.authdata, authdata, HSRP_AUTHDATA_LENGTH*sizeof(uint8_t));
        !            76:     hsrp_hdr.virtual_ip = virtual_ip;
        !            77: 
        !            78:     n = libnet_pblock_append(l, p, (uint8_t *)&hsrp_hdr, LIBNET_HSRP_H);
        !            79:     if (n == -1)
        !            80:     {
        !            81:         goto bad;
        !            82:     }
        !            83: 
        !            84:     if (payload_s && !payload)
        !            85:     {
        !            86:         snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
        !            87:                 "%s(): payload inconsistency\n", __func__);
        !            88:         goto bad;
        !            89:     }
        !            90:  
        !            91:     if (payload_s)
        !            92:     {
        !            93:         n = libnet_pblock_append(l, p, payload, payload_s);
        !            94:         if (n == -1)
        !            95:         {
        !            96:             goto bad;
        !            97:         }
        !            98:     }
        !            99:  
        !           100:     return (ptag ? ptag : libnet_pblock_update(l, p, 0, LIBNET_PBLOCK_HSRP_H));
        !           101: bad:
        !           102:     libnet_pblock_delete(l, p);
        !           103:     return (-1);
        !           104: }
        !           105: /* EOF */