/*-
* Copyright (c) 2000 Jakob Stoklund Olesen <stoklund@taxidriver.dk>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/usr.sbin/ppp/atm.c,v 1.10.26.1 2010/12/21 17:10:29 kensmith Exp $
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netnatm/natm.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <sys/uio.h>
#include <termios.h>
#include <unistd.h>
#include "layer.h"
#include "defs.h"
#include "mbuf.h"
#include "log.h"
#include "timer.h"
#include "lqr.h"
#include "hdlc.h"
#include "throughput.h"
#include "fsm.h"
#include "lcp.h"
#include "ccp.h"
#include "link.h"
#include "async.h"
#include "descriptor.h"
#include "physical.h"
#include "main.h"
#include "atm.h"
/* String identifying PPPoA */
#define PPPOA "PPPoA"
#define PPPOA_LEN (sizeof(PPPOA) - 1)
struct atmdevice {
struct device dev; /* What struct physical knows about */
};
#define device2atm(d) ((d)->type == ATM_DEVICE ? (struct atmdevice *)d : NULL)
unsigned
atm_DeviceSize(void)
{
return sizeof(struct atmdevice);
}
static ssize_t
atm_Sendto(struct physical *p, const void *v, size_t n)
{
ssize_t ret = write(p->fd, v, n);
if (ret < 0) {
log_Printf(LogDEBUG, "atm_Sendto(%ld): %s\n", (long)n, strerror(errno));
return ret;
}
return ret;
}
static ssize_t
atm_Recvfrom(struct physical *p, void *v, size_t n)
{
ssize_t ret = read(p->fd, (char*)v, n);
if (ret < 0) {
log_Printf(LogDEBUG, "atm_Recvfrom(%ld): %s\n", (long)n, strerror(errno));
return ret;
}
return ret;
}
static void
atm_Free(struct physical *p)
{
struct atmdevice *dev = device2atm(p->handler);
free(dev);
}
static void
atm_device2iov(struct device *d, struct iovec *iov, int *niov,
int maxiov __unused, int *auxfd __unused, int *nauxfd __unused)
{
int sz = physical_MaxDeviceSize();
iov[*niov].iov_base = realloc(d, sz);
if (iov[*niov].iov_base == NULL) {
log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
AbortProgram(EX_OSERR);
}
iov[*niov].iov_len = sz;
(*niov)++;
}
static const struct device baseatmdevice = {
ATM_DEVICE,
"atm",
0,
{ CD_NOTREQUIRED, 0 },
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
atm_Free,
atm_Recvfrom,
atm_Sendto,
atm_device2iov,
NULL,
NULL,
NULL
};
struct device *
atm_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
int maxiov __unused, int *auxfd __unused, int *nauxfd __unused)
{
if (type == ATM_DEVICE) {
struct atmdevice *dev = (struct atmdevice *)iov[(*niov)++].iov_base;
dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */
if (dev == NULL) {
log_Printf(LogALERT, "Failed to allocate memory: %d\n",
(int)(sizeof *dev));
AbortProgram(EX_OSERR);
}
/* Refresh function pointers etc */
memcpy(&dev->dev, &baseatmdevice, sizeof dev->dev);
physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
return &dev->dev;
}
return NULL;
}
static struct atmdevice *
atm_CreateDevice(struct physical *p, const char *iface, unsigned vpi,
unsigned vci)
{
struct atmdevice *dev;
struct sockaddr_natm sock;
if ((dev = calloc(1, sizeof *dev)) == NULL) {
log_Printf(LogWARN, "%s: Cannot allocate an atm device: %s\n",
p->link.name, strerror(errno));
return NULL;
}
sock.snatm_len = sizeof sock;
sock.snatm_family = AF_NATM;
strncpy(sock.snatm_if, iface, IFNAMSIZ);
sock.snatm_vpi = vpi;
sock.snatm_vci = vci;
log_Printf(LogPHASE, "%s: Connecting to %s:%u.%u\n", p->link.name,
iface, vpi, vci);
p->fd = socket(PF_NATM, SOCK_DGRAM, PROTO_NATMAAL5);
if (p->fd >= 0) {
log_Printf(LogDEBUG, "%s: Opened atm socket %s\n", p->link.name,
p->name.full);
if (connect(p->fd, (struct sockaddr *)&sock, sizeof sock) == 0)
return dev;
else
log_Printf(LogWARN, "%s: connect: %s\n", p->name.full, strerror(errno));
} else
log_Printf(LogWARN, "%s: socket: %s\n", p->name.full, strerror(errno));
close(p->fd);
p->fd = -1;
free(dev);
return NULL;
}
struct device *
atm_Create(struct physical *p)
{
struct atmdevice *dev;
dev = NULL;
if (p->fd < 0 && !strncasecmp(p->name.full, PPPOA, PPPOA_LEN)
&& p->name.full[PPPOA_LEN] == ':') {
char iface[25];
unsigned vci, vpi;
if (sscanf(p->name.full + PPPOA_LEN + 1, "%25[A-Za-z0-9]:%u.%u", iface,
&vpi, &vci) != 3) {
log_Printf(LogWARN, "Malformed ATM device name \'%s\', "
"PPPoA:if:vpi.vci expected\n", p->name.full);
return NULL;
}
dev = atm_CreateDevice(p, iface, vpi, vci);
}
if (dev) {
memcpy(&dev->dev, &baseatmdevice, sizeof dev->dev);
physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
if (p->cfg.cd.necessity != CD_DEFAULT)
log_Printf(LogWARN, "Carrier settings ignored\n");
return &dev->dev;
}
return NULL;
}