5d9e610366
the layering. We now ``stack'' layers as soon as we open the device (when we figure out what we're dealing with). A static set of `dispatch' routines are also declared for dealing with incoming packets after they've been `pulled' up through the stacked layers. Physical devices are now assigned handlers based on the device type when they're opened. For the moment there are three device types; ttys, execs and tcps. o Increment version number to 2.2 o Make an entry in [uw]tmp for non-tty -direct invocations (after pap/chap authentication). o Make throughput counters quad_t's o Account for the absolute number of mbuf malloc()s and free()s in ``show mem''. o ``show modem'' becomes ``show physical''.
161 lines
4.2 KiB
C
161 lines
4.2 KiB
C
/*-
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* Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
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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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* $Id:$
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <fcntl.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 <sys/wait.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 "sync.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 "slcompress.h"
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#include "iplist.h"
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#include "ipcp.h"
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#include "filter.h"
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#include "descriptor.h"
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#include "physical.h"
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#include "mp.h"
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#ifndef NORADIUS
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#include "radius.h"
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#endif
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#include "chat.h"
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#include "command.h"
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#include "bundle.h"
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#include "prompt.h"
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#include "auth.h"
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#include "chap.h"
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#include "cbcp.h"
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#include "datalink.h"
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#include "exec.h"
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static int
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exec_Open(struct physical *p)
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{
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if (*p->name.full == '!') {
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int fids[2];
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if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, fids) < 0)
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log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
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strerror(errno));
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else {
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int stat, argc;
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pid_t pid;
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char *argv[MAXARGS];
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stat = fcntl(fids[0], F_GETFL, 0);
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if (stat > 0) {
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stat |= O_NONBLOCK;
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fcntl(fids[0], F_SETFL, stat);
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}
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switch ((pid = fork())) {
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case -1:
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log_Printf(LogPHASE, "Unable to create pipe for line exec: %s\n",
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strerror(errno));
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break;
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case 0:
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close(fids[0]);
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timer_TermService();
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setuid(geteuid());
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switch (fork()) {
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case 0:
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break;
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case -1:
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log_Printf(LogPHASE, "Unable to fork to drop parent: %s\n",
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strerror(errno));
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default:
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_exit(127);
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}
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fids[1] = fcntl(fids[1], F_DUPFD, 3);
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dup2(fids[1], STDIN_FILENO);
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dup2(fids[1], STDOUT_FILENO);
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dup2(fids[1], STDERR_FILENO);
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argc = MakeArgs(p->name.base, argv, VECSIZE(argv));
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command_Expand(argv, argc, (char const *const *)argv,
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p->dl->bundle, 0);
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execvp(*argv, argv);
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fprintf(stderr, "execvp failed: %s: %s\r\n", *argv, strerror(errno));
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_exit(127);
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break;
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default:
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close(fids[1]);
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p->fd = fids[0];
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waitpid(pid, &stat, 0);
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log_Printf(LogDEBUG, "Using descriptor %d for child\n", p->fd);
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physical_SetupStack(p, 1);
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return 1;
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}
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}
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}
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return 0;
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}
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const struct device execdevice = {
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EXEC_DEVICE,
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"exec",
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exec_Open,
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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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};
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