+++ /dev/null
-/* $Id: ip.c,v 1.1 2005/12/12 18:14:22 nobunaga Exp $
-
-Copyright (C) 2002 Marc Kirchner <kirchner@stud.fh-heilbronn.de>
-
-This library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Lesser General Public
-License as published by the Free Software Foundation; either
-version 2.1 of the License, or (at your option) any later version.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public
-License along with this library; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#include "libpal.h"
-
-int
-pkt_ip_header(struct packet *pkt,
- unsigned int iphdr_len,
- unsigned int version,
- unsigned char tos,
- unsigned short int total_len,
- unsigned short int id,
- unsigned short int frag_off,
- unsigned char ttl,
- unsigned char protocol,
- unsigned short int cksum,
- unsigned int saddr,
- unsigned int daddr)
-{
- struct ip *ip;
-
- if (!pkt)
- return EPKTINVALPTR;
-
- ip = (struct ip *) pkt->pkt_ptr;
-
- ip->ip_hl = iphdr_len;
- ip->ip_v = version;
- ip->ip_tos = tos;
- ip->ip_len = htons(total_len);
- ip->ip_id = htons(id);
- ip->ip_off = htons(frag_off);
- ip->ip_ttl = ttl;
- ip->ip_p = protocol;
- ip->ip_src.s_addr = saddr;
- ip->ip_dst.s_addr = daddr;
-
- return 0;
-}
-
-int
-pkt_ip_option_header(struct packet *pkt, unsigned char type, unsigned char len, unsigned char ptr, unsigned char oflw_flg, void *optval, size_t optlen)
-{
- unsigned char *vp;
-
- if (!pkt)
- return EPKTINVALPTR;
-
- vp = pkt->pkt_ptr;
- *vp = type;
- switch (type) {
- case PKT_IP_OPT_END:
- break;
- case PKT_IP_OPT_NOP:
- break;
- case PKT_IP_OPT_SEC:
- if ((pkt->pkt_pos + 2 + optlen) <= pkt->pkt_size) {
- *(vp+1) = len;
- memcpy((void*)(vp+2), optval, optlen);
- } else {
- return EPKTRANGE;
- }
- break;
- case PKT_IP_OPT_RR:
- case PKT_IP_OPT_LSRR:
- case PKT_IP_OPT_SSRR:
- case PKT_IP_OPT_SID:
- if ((pkt->pkt_pos + 3 + optlen) <= pkt->pkt_size) {
- *(vp+1) = len;
- *(vp+2) = ptr;
- memcpy((void*)(vp+3), optval, optlen);
- } else {
- return EPKTRANGE;
- }
- break;
- case PKT_IP_OPT_TS:
- if ((pkt->pkt_pos + 4 + optlen) <= pkt->pkt_size) {
- *(vp+1) = len;
- *(vp+2) = ptr;
- *(vp+3) = oflw_flg;
- memcpy((void*)(vp+4), optval, optlen);
- } else {
- return EPKTRANGE;
- }
- break;
- default:
- return EPKTUNKNOWNTYPE;
- }
- return PKTOK;
-}
-
-int
-pkt_ip_cksum(struct packet *pkt)
-{
- /*
- * checksum should be calculated by kernel
- * when we are using SOCK_RAW access.
- */
- struct ip *ip;
-
- if (!pkt)
- return EPKTINVALPTR;
-
- ip = (struct ip *) pkt->pkt_ptr;
- ip->ip_sum = 0;
- ip->ip_sum = in_cksum((unsigned short *)ip, sizeof(struct ip));
- return 0;
-}