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KA9Q212.ZIP
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ASY.C
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C/C++ Source or Header
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1993-07-16
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6KB
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267 lines
/* Generic serial line interface routines
* Copyright 1991 Phil Karn, KA9Q
*/
/****************************************************************************
* $Id: asy.c 1.3 93/07/16 11:42:04 ROOT_DOS Exp $
* 14 Jul 93 1.2 GT Fix warnings. *
****************************************************************************/
#include <stdio.h>
#include "global.h"
#include "config.h"
#include "proc.h"
#include "iface.h"
#include "netuser.h"
#include "slhc.h"
#include "8250.h"
#include "asy.h"
#include "ax25.h"
#include "kiss.h"
#include "nrs.h"
#include "pktdrvr.h"
#include "slip.h"
#include "ppp.h"
#include "commands.h"
static int asy_detach __ARGS((struct iface *ifp));
/* Attach a serial interface to the system
* argv[0]: hardware type, must be "asy"
* argv[1]: I/O address, e.g., "0x3f8"
* argv[2]: vector, e.g., "4"
* argv[3]: mode, may be:
* "slip" (point-to-point SLIP)
* "ax25" (AX.25 frame format in SLIP for raw TNC)
* "nrs" (NET/ROM format serial protocol)
* "ppp" (Point-to-Point Protocol, RFC1171, RFC1172)
* argv[4]: interface label, e.g., "sl0"
* argv[5]: receiver ring buffer size in bytes
* argv[6]: maximum transmission unit, bytes
* argv[7]: interface speed, e.g, "9600"
* argv[8]: optional flags,
* 'v' for Van Jacobson TCP header compression (SLIP only,
* use ppp command for VJ compression with PPP);
*/
int
asy_attach(argc,argv,p)
int argc;
char *argv[];
void *p;
{
register struct iface *ifp;
struct asy *asyp;
int dev;
int trigchar = -1;
char monitor = FALSE;
#if defined(SLIP) || defined(AX25)
struct slip *sp;
char *ifn;
int xdev;
#endif
#ifdef NRS
struct nrs *np;
#endif
if(if_lookup(argv[4]) != NULLIF){
tprintf("Interface %s already exists\n",argv[4]);
return -1;
}
/* Find unused asy control block */
for(dev=0;dev < ASY_MAX;dev++){
asyp = &Asy[dev];
if(asyp->iface == NULLIF)
break;
}
if(dev >= ASY_MAX){
tprintf("Too many asynch controllers\n");
return -1;
}
/* Create interface structure and fill in details */
ifp = (struct iface *)callocw(1,sizeof(struct iface));
ifp->addr = Ip_addr;
ifp->name = strdup(argv[4]);
ifp->mtu = atoi(argv[6]);
ifp->dev = dev;
ifp->stop = asy_detach;
ifp->dial_me = FALSE;
#ifdef SLIP
if(stricmp(argv[3],"SLIP") == 0) {
for(xdev = 0;xdev < SLIP_MAX;xdev++){
sp = &Slip[xdev];
if(sp->iface == NULLIF)
break;
}
if(xdev >= SLIP_MAX) {
tprintf("Too many slip devices\n");
return -1;
}
setencap(ifp,"SLIP");
ifp->ioctl = asy_ioctl;
ifp->raw = slip_raw;
ifp->show = slip_status;
ifp->flags = 0;
ifp->xdev = xdev;
sp->iface = ifp;
sp->send = asy_send;
sp->get = get_asy;
sp->type = CL_SERIAL_LINE;
trigchar = FR_END;
#ifdef VJCOMPRESS
if((argc > 8) && (strchr(argv[8],'v') != NULLCHAR)) {
sp->escaped |= SLIP_VJCOMPR;
sp->slcomp = slhc_init(16,16);
}
#else
sp->slcomp = NULL;
#endif /* VJCOMPRESS */
ifp->rxproc = newproc( ifn = if_name( ifp, " rx" ),
256,asy_rx,xdev,NULL,NULL,0);
free(ifn);
} else
#endif
#ifdef AX25
if(stricmp(argv[3],"AX25") == 0) {
/* Set up a SLIP link to use AX.25 */
for(xdev = 0;xdev < SLIP_MAX;xdev++){
sp = &Slip[xdev];
if(sp->iface == NULLIF)
break;
}
if(xdev >= SLIP_MAX) {
tprintf("Too many slip devices\n");
return -1;
}
setencap(ifp,"AX25");
ifp->ioctl = kiss_ioctl;
ifp->raw = kiss_raw;
ifp->show = slip_status;
if(ifp->hwaddr == NULLCHAR)
ifp->hwaddr = mallocw(AXALEN);
memcpy(ifp->hwaddr,Mycall,AXALEN);
ifp->xdev = xdev;
sp->iface = ifp;
sp->send = asy_send;
sp->get = get_asy;
sp->type = CL_KISS;
trigchar = FR_END;
ifp->rxproc = newproc( ifn = if_name( ifp, " rx" ),
256,asy_rx,xdev,NULL,NULL,0);
free(ifn);
} else
#endif
#ifdef NRS
if(stricmp(argv[3],"NRS") == 0) {
/* Set up a net/rom serial iface */
for(xdev = 0;xdev < SLIP_MAX;xdev++){
np = &Nrs[xdev];
if(np->iface == NULLIF)
break;
}
if(xdev >= SLIP_MAX) {
tprintf("Too many nrs devices\n");
return -1;
}
/* no call supplied? */
setencap(ifp,"AX25");
ifp->ioctl = asy_ioctl;
ifp->raw = nrs_raw;
ifp->hwaddr = mallocw(AXALEN);
memcpy(ifp->hwaddr,Mycall,AXALEN);
ifp->xdev = xdev;
np->iface = ifp;
np->send = asy_send;
np->get = get_asy;
trigchar = ETX;
ifp->rxproc = newproc( ifn = if_name( ifp, " nrs" ),
256,nrs_recv,xdev,NULL,NULL,0);
free(ifn);
} else
#endif
#ifdef PPP
if(stricmp(argv[3],"PPP") == 0) {
/* Setup for Point-to-Point Protocol */
trigchar = HDLC_FLAG;
monitor = TRUE;
setencap(ifp,"PPP");
ifp->ioctl = asy_ioctl;
ifp->flags = FALSE;
/* Initialize parameters for various PPP phases/protocols */
if (ppp_init(ifp) != 0) {
tprintf("Cannot allocate PPP control block\n");
free(ifp->name);
free((char *)ifp);
return -1;
}
} else
#endif
{
tprintf("Mode %s unknown for interface %s\n",
argv[3],argv[4]);
free(ifp->name);
free(ifp);
return -1;
}
/* Link in the interface */
ifp->next = Ifaces;
Ifaces = ifp;
asy_init(dev,ifp,argv[1],argv[2],(int16)atol(argv[5]),
trigchar,monitor,(int16)atol(argv[7]));
return 0;
}
static int
asy_detach(ifp)
struct iface *ifp;
{
asy_stop(ifp);
#ifdef SLIP
if(stricmp(ifp->iftype->name,"SLIP") == 0) {
Slip[ifp->xdev].iface = NULLIF;
#ifdef VJCOMPRESS
slhc_free( Slip[ifp->xdev].slcomp );
Slip[ifp->xdev].slcomp = NULL;
#endif /* VJCOMPRESS */
} else
#endif
#ifdef AX25
if(stricmp(ifp->iftype->name,"AX25") == 0
&& Slip[ifp->xdev].iface == ifp ) {
Slip[ifp->xdev].iface = NULLIF;
} else
#endif
#ifdef NRS
if(stricmp(ifp->iftype->name,"AX25") == 0
&& Nrs[ifp->xdev].iface == ifp ) {
Nrs[ifp->xdev].iface = NULLIF;
} else
#endif
#ifdef PPP
if(stricmp(ifp->iftype->name,"PPP") == 0) {
ppp_free(ifp);
} else
#endif
{
tprintf("invalid type %s for interface %s\n",
ifp->iftype->name, ifp->name);
free(ifp->name);
free(ifp);
return -1;
}
return 0;
}