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