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/*
* DIS/x : An implementation of the IEEE 1278.1 protocol
*
* Copyright (C) 1996, Riley Rainey (rainey@netcom.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of either:
*
* a) the GNU Library General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your
* option) any later version. A description of the terms and conditions
* of the GLPL may be found in the "COPYING.LIB" file.
*
* b) the "Artistic License" which comes with this Kit. Information
* about this license may be found in the "Artistic" file.
*
* 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
* Library General Public License or the Artistic License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Information describing how to contact the author can be found in the
* README file.
*/
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <dis/dis.h>
#include <sys/uio.h>
#include <sys/socket.h>
#define BSD_COMP /* keeps Solaris happy */
#include <sys/ioctl.h>
#include <net/if.h>
#include <stdio.h>
#include <dis_relay.h>
SwitchClient *client_list = 0;
#if SYSCALL_PROTO
extern int recvmsg(int, struct msghdr *, int);
extern int sendmsg(int, struct msghdr *, int);
extern int socket(int domain, int type, int protocol);
extern int setsockopt(int s, int level, int optname, char *optval, int optlen);
extern int bind(int s, struct sockaddr *name, int namelen);
extern int ioctl(int, int,...);
extern void perror(const char *);
extern void bcopy(const void *, void *, int);
#endif
int
ReadPDUFrame(DISTransceiver * xcvr, char *pdu, int pdu_max, struct sockaddr *from)
{
int size;
struct msghdr msg;
struct iovec vec;
msg.msg_name = (caddr_t) from;
msg.msg_namelen = sizeof(struct sockaddr);
msg.msg_iov = &vec;
msg.msg_iovlen = 1;
#ifdef HAVE_MSG_CONTROL
msg.msg_control = (caddr_t) NULL;
msg.msg_controllen = 0;
#endif
#ifdef HAVE_MSG_ACCRIGHTS
msg.msg_accrights = (caddr_t) NULL;
msg.msg_accrightslen = 0;
#endif
vec.iov_base = (caddr_t) pdu;
vec.iov_len = pdu_max;
size = recvmsg(xcvr->s, &msg, 0);
return size;
}
int
WritePDU(DISTransceiver * xcvr, char *buffer, int length, struct sockaddr *to)
{
char *p;
struct msghdr msg;
struct iovec vec;
int i, result;
msg.msg_namelen = sizeof(struct sockaddr);
msg.msg_iov = &vec;
msg.msg_iovlen = 1;
#ifdef HAVE_MSG_CONTROL
msg.msg_control = (caddr_t) NULL;
msg.msg_controllen = 0;
#endif
#ifdef HAVE_MSG_ACCRIGHTS
msg.msg_accrights = (caddr_t) NULL;
msg.msg_accrightslen = 0;
#endif
vec.iov_base = (caddr_t) & buffer;
vec.iov_len = length;
msg.msg_name = (caddr_t) to;
if ((result = sendmsg(xcvr->s, &msg, 0)) == -1) {
perror("on sendmsg");
}
return 0;
}
void
RelayPDUFrame(DISTransceiver * xcvr, char *buffer, int size, struct sockaddr *from)
{
SwitchClient *p, *new;
int found = 0;
for (p = client_list; p; p=p->next) {
if (memcmp(from, &p->addr, sizeof(struct sockaddr)) == 0) {
found = 1;
p->frame_count += 1;
}
else {
WritePDU(xcvr, buffer, size, &p->addr);
}
}
if (found == 0) {
if ((new = malloc(sizeof(SwitchClient)))) {
new->frame_count = 1;
memcpy(&new->addr, from, sizeof(struct sockaddr));
new->next = client_list;
client_list = new;
}
else {
fprintf(stderr, "memory allocation error\n");
exit(1);
}
}
}
int
main(int argc, char **argv)
{
DISTransceiver *xcvr;
struct sockaddr from;
int size;
char buf[2048];
xcvr = DISOpenTransceiver(-1);
while (1) {
if ((size = ReadPDUFrame(xcvr, buf, sizeof(buf), &from)) > 0) {
RelayPDUFrame(xcvr, buf, size, &from);
}
}
}
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