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-rw-r--r--src/atm.c237
1 files changed, 237 insertions, 0 deletions
diff --git a/src/atm.c b/src/atm.c
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+++ b/src/atm.c
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+/*-
+ * 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;
+}
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