-/* $Id: socket.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"
-
-/*
-<++doc++>
-@name int pkt_socket_open(struct pkt_socket *sck, int type)
-@desc Opens a packet socket. This is necessary to be able to send any packages.
-@param sck pointer to a pkt_socket structure
-@param type The type of the socket. Possible values are PKT_RAW (to open a raw socket. IP, TCP/UDP and application header have to be forged before sending) , PKT_STREAM, PKT_DGRAM. STREAM and DGRAM are supported by this function, but other function do not care.
-<--doc-->
-*/
-int
-pkt_socket_open(struct pkt_socket *sck, int type)
-{
- int proto;
- int iphdrincl = 1;
- int ret = 0;
-
- if (!sck)
- return EPKTINVALPTR;
-
- /* get mem for sockaddr structure */
- if ((sck->sckad = (struct sockaddr_in *) malloc (sizeof(struct sockaddr_in))) == NULL) {
- return -1;
- }
- sck->sckad_len = sizeof(struct sockaddr_in);
- memset(sck->sckad, 0, sck->sckad_len);
-
- /* except for raw sockets, proto is set to 0 */
- /* (Stevens, UNP 2nd ed., 1998) */
- switch (type) {
- case PKT_RAW:
- proto = IPPROTO_RAW;
- break;
- default:
- proto = 0;
- break;
- }
- if ((sck->rawfd = socket(AF_INET, type, proto)) == -1) {
- return -1;
- }
- if (type == PKT_RAW) {
- if ((ret = setsockopt(sck->rawfd, IPPROTO_IP, IP_HDRINCL, (const void *) &iphdrincl, sizeof(iphdrincl))) < 0) {
- return -1;
- }
- }
- return 0;
-}
-
-
-/*
-<++doc++>
-@name int pkt_socket_close(struct pkt_socket *sck)
-@desc Closes a packet socket and frees used memory.
-@param sck pointer to a pkt_socket structure
-<--doc-->
-*/
-int
-pkt_socket_close(struct pkt_socket *sck)
-{
- if (!sck)
- return EPKTINVALPTR;
- close(sck->rawfd);
- free(sck->sckad);
- sck->sckad=NULL;
- return 0;
-}
-
-/*
-<++doc++>
-@name int pkt_socket_prepare(struct pkt_socket *sck, char *daddr)
-@desc this function is necessary to enable the kernel to determine the correct outgoing interface
-@param sck pointer to a pkt_socket structure
-@param daddr dotted-decimal destination IP address
-<--doc-->
-*/
-int
-pkt_socket_prepare(struct pkt_socket *sck, char *daddr)
-{
- /*
- * this is necessary for the kernel to determine outgoing
- * interface.
- */
-
- int ret = 0;
-
- if (!sck || !daddr)
- return EPKTINVALPTR;
-
- /* set up sockaddr struct */
- memset(sck->sckad, 0, sck->sckad_len);
- if ((ret = inet_pton(AF_INET, daddr, &(sck->sckad->sin_addr))) == 0) {
- return -1;
- }
- sck->sckad->sin_family = AF_INET;
-
- /*
- * i dont think we need to set the dest port...
- */
- return 0;
-}
-
-/*
-<++doc++>
-@name int pkt_socket_setopt(struct pkt_socket *sck, int level, int optname, void *optval, socklen_t optlen)
-@desc this is basically a wrapper function for setsockopt(2)
-@param sck pointer to a pkt_socket structure
-@param level level the socket option will apply to (should be SOL_SOCKET)
-@param optname option name, see sys/socket.h for values
-@param optval new option value (for boolean options: 0=false)
-@param optlen option value size (this is a value-result parameter!)
-<--doc-->
-*/
-int
-pkt_socket_setopt(struct pkt_socket *sck, int level,
- int optname, void *optval, socklen_t optlen)
-{
- if (!sck)
- return EPKTINVALPTR;
- return (setsockopt(sck->rawfd, level, optname, optval, optlen));
-}
-
-
-/*
-<++doc++>
-@name int pkt_send(struct packet *pkt, struct pkt_socket *sck)
-@desc sends the packet pkt unsing the socket sck
-@param pkt pointer to a packet structure
-@param sck pointer to a pkt_socket structure
-<--doc-->
-*/
-int
-pkt_send(struct packet *pkt, struct pkt_socket *sck)
-{
- int ret = 0;
-
- if (!pkt || !sck)
- return EPKTINVALPTR;
-
- /* no sendto-flags support */
- if ((ret = sendto(sck->rawfd, pkt->pkt, pkt->pkt_size, 0, (struct sockaddr *) sck->sckad, sck->sckad_len)) == -1) {
- return -1;
- }
- return 0;
-}
git.stg.codes / stg.git / commitdiff