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📁 ..
📄 Makefile(1.66 KB)
📄 Makefile.depend(435 B)
📄 README.changes(7.26 KB)
📄 README.nat(14.85 KB)
📄 acf.c(3.51 KB)
📄 acf.h(1.5 KB)
📄 arp.c(8.24 KB)
📄 arp.h(1.76 KB)
📄 async.c(5.39 KB)
📄 async.h(1.9 KB)
📄 auth.c(12.02 KB)
📄 auth.h(2.69 KB)
📄 bundle.c(56.37 KB)
📄 bundle.h(7.7 KB)
📄 cbcp.c(22.53 KB)
📄 cbcp.h(2.51 KB)
📄 ccp.c(23.33 KB)
📄 ccp.h(5.53 KB)
📄 chap.c(27 KB)
📄 chap.h(2.69 KB)
📄 chap_ms.c(12.22 KB)
📄 chap_ms.h(2.48 KB)
📄 chat.c(20.41 KB)
📄 chat.h(2.92 KB)
📄 command.c(101.76 KB)
📄 command.h(3.02 KB)
📄 datalink.c(42.89 KB)
📄 datalink.h(6.11 KB)
📄 deflate.c(15.89 KB)
📄 deflate.h(1.52 KB)
📄 defs.c(8.61 KB)
📄 defs.h(5.41 KB)
📄 descriptor.h(2.24 KB)
📄 ether.c(20.81 KB)
📄 ether.h(1.73 KB)
📄 exec.c(11.47 KB)
📄 exec.h(1.67 KB)
📄 filter.c(15.76 KB)
📄 filter.h(3.8 KB)
📄 fsm.c(31.01 KB)
📄 fsm.h(7.02 KB)
📄 hdlc.c(15.17 KB)
📄 hdlc.h(3.9 KB)
📄 i4b.h(1.73 KB)
📄 id.c(6.05 KB)
📄 id.h(3.01 KB)
📄 iface.c(22.41 KB)
📄 iface.h(2.97 KB)
📄 ip.c(30.21 KB)
📄 ip.h(2.09 KB)
📄 ipcp.c(42.99 KB)
📄 ipcp.h(5.14 KB)
📄 iplist.c(5.54 KB)
📄 iplist.h(1.99 KB)
📄 ipv6cp.c(21.9 KB)
📄 ipv6cp.h(3.26 KB)
📄 layer.h(1.97 KB)
📄 lcp.c(39.22 KB)
📄 lcp.h(6.3 KB)
📄 link.c(10.36 KB)
📄 link.h(3.42 KB)
📄 log.c(11.33 KB)
📄 log.h(4.14 KB)
📄 lqr.c(17.5 KB)
📄 lqr.h(3.31 KB)
📄 main.c(17.93 KB)
📄 main.h(1.6 KB)
📄 mbuf.c(10.02 KB)
📄 mbuf.h(4 KB)
📄 mp.c(33.66 KB)
📄 mp.h(4.87 KB)
📄 mppe.c(20.27 KB)
📄 mppe.h(1.57 KB)
📄 nat_cmd.c(15.37 KB)
📄 nat_cmd.h(1.88 KB)
📄 ncp.c(13.17 KB)
📄 ncp.h(4.36 KB)
📄 ncpaddr.c(23.06 KB)
📄 ncpaddr.h(4.63 KB)
📄 netgraph.c(20.65 KB)
📄 netgraph.h(1.72 KB)
📄 pap.c(8.83 KB)
📄 pap.h(1.78 KB)
📄 physical.c(29.01 KB)
📄 physical.h(6.5 KB)
📄 ppp.8(149.48 KB)
📄 ppp.conf(1.23 KB)
📄 pred.c(8.83 KB)
📄 pred.h(1.59 KB)
📄 probe.c(2.29 KB)
📄 probe.h(1.57 KB)
📄 prompt.c(12.92 KB)
📄 prompt.h(3.87 KB)
📄 proto.c(3.22 KB)
📄 proto.h(2.4 KB)
📄 radius.c(39.38 KB)
📄 radius.h(4.6 KB)
📄 route.c(25.91 KB)
📄 route.h(3.3 KB)
📄 server.c(10.9 KB)
📄 server.h(2.26 KB)
📄 sig.c(3.45 KB)
📄 sig.h(1.6 KB)
📄 slcompress.c(17.2 KB)
📄 slcompress.h(6.48 KB)
📄 sync.c(2.7 KB)
📄 sync.h(1.44 KB)
📄 systems.c(11.45 KB)
📄 systems.h(2.02 KB)
📄 tcp.c(5.63 KB)
📄 tcp.h(1.66 KB)
📄 tcpmss.c(5.06 KB)
📄 tcpmss.h(1.44 KB)
📄 throughput.c(8.84 KB)
📄 throughput.h(2.91 KB)
📄 timer.c(8.14 KB)
📄 timer.h(2.31 KB)
📄 tty.c(20.63 KB)
📄 tty.h(1.73 KB)
📄 tun.c(3.27 KB)
📄 tun.h(1.58 KB)
📄 ua.h(2.98 KB)
📄 udp.c(8.7 KB)
📄 udp.h(1.67 KB)
📄 vjcomp.c(5.68 KB)
📄 vjcomp.h(1.53 KB)

Editing: tcp.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
 * 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.
 *
 * $FreeBSD$
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.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 "tcp.h"

static int
tcp_OpenConnection(const char *name, char *host, char *port)
{
  struct sockaddr_in dest;
  int sock;
  struct servent *sp;

dest.sin_family = AF_INET;
  dest.sin_addr = GetIpAddr(host);
  if (dest.sin_addr.s_addr == INADDR_NONE) {
    log_Printf(LogWARN, "%s: %s: unknown host\n", name, host);
    return -2;
  }
  dest.sin_port = htons(atoi(port));
  if (dest.sin_port == 0) {
    sp = getservbyname(port, "tcp");
    if (sp)
      dest.sin_port = sp->s_port;
    else {
      log_Printf(LogWARN, "%s: %s: unknown service\n", name, port);
      return -2;
    }
  }
  log_Printf(LogPHASE, "%s: Connecting to %s:%s/tcp\n", name, host, port);

sock = socket(PF_INET, SOCK_STREAM, 0);
  if (sock < 0)
    return -2;

if (connect(sock, (struct sockaddr *)&dest, sizeof dest) < 0) {
    log_Printf(LogWARN, "%s: connect: %s\n", name, strerror(errno));
    close(sock);
    return -2;
  }

return sock;
}

static struct device tcpdevice = {
  TCP_DEVICE,
  "tcp",
  0,
  { CD_NOTREQUIRED, 0 },
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL
};

struct device *
tcp_iov2device(int type, struct physical *p, struct iovec *iov,
               int *niov, int maxiov __unused, int *auxfd __unused,
	       int *nauxfd __unused)
{
  if (type == TCP_DEVICE) {
    free(iov[(*niov)++].iov_base);
    physical_SetupStack(p, tcpdevice.name, PHYSICAL_FORCE_ASYNC);
    return &tcpdevice;
  }

return NULL;
}

struct device *
tcp_Create(struct physical *p)
{
  char *cp, *host, *port, *svc;

if (p->fd < 0) {
    if ((cp = strchr(p->name.full, ':')) != NULL && !strchr(cp + 1, ':')) {
      *cp = '\0';
      host = p->name.full;
      port = cp + 1;
      svc = strchr(port, '/');
      if (svc && strcasecmp(svc, "/tcp")) {
        *cp = ':';
        return 0;
      }
      if (svc) {
        p->fd--;     /* We own the device but maybe can't use it - change fd */
        *svc = '\0';
      }
      if (*host && *port) {
        p->fd = tcp_OpenConnection(p->link.name, host, port);
        *cp = ':';
        if (svc)
          *svc = '/';
        if (p->fd >= 0)
          log_Printf(LogDEBUG, "%s: Opened tcp socket %s\n", p->link.name,
                     p->name.full);
      } else {
        if (svc)
          *svc = '/';
        *cp = ':';
      }
    }
  }

if (p->fd >= 0) {
    /* See if we're a tcp socket */
    struct stat st;

if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) {
      int type, sz;

sz = sizeof type;
      if (getsockopt(p->fd, SOL_SOCKET, SO_TYPE, &type, &sz) == -1) {
        log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name);
        close(p->fd);
        p->fd = -1;
        return NULL;
      }

if (sz == sizeof type && type == SOCK_STREAM) {
        struct sockaddr_in sock;
        struct sockaddr *sockp = (struct sockaddr *)&sock;

if (*p->name.full == '\0') {
          sz = sizeof sock;
          if (getpeername(p->fd, sockp, &sz) != 0 ||
              sz != sizeof(struct sockaddr_in) || sock.sin_family != AF_INET) {
            log_Printf(LogDEBUG, "%s: Link is SOCK_STREAM, but not inet\n",
                       p->link.name);
            return NULL;
          }

log_Printf(LogPHASE, "%s: Link is a tcp socket\n", p->link.name);

snprintf(p->name.full, sizeof p->name.full, "%s:%d/tcp",
                   inet_ntoa(sock.sin_addr), ntohs(sock.sin_port));
          p->name.base = p->name.full;
        }
        physical_SetupStack(p, tcpdevice.name, PHYSICAL_FORCE_ASYNC);
        if (p->cfg.cd.necessity != CD_DEFAULT)
          log_Printf(LogWARN, "Carrier settings ignored\n");
        return &tcpdevice;
      }
    }
  }

return NULL;
}

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Editing: tcp.c

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