420 lines
12 KiB
C
420 lines
12 KiB
C
/*-
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* Copyright (c) 1997 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: pppctl.c,v 1.15 1997/12/27 13:44:42 brian Exp $
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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 <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/un.h>
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#include <netdb.h>
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#include <sys/time.h>
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#include <errno.h>
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#include <histedit.h>
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#include <setjmp.h>
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#include <signal.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 <time.h>
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#include <unistd.h>
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#define LINELEN 2048
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static char Buffer[LINELEN], Command[LINELEN];
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static int
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Usage()
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{
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fprintf(stderr, "Usage: pppctl [-v] [ -t n ] [ -p passwd ] "
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"Port|LocalSock [command[;command]...]\n");
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fprintf(stderr, " -v tells pppctl to output all"
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" conversation\n");
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fprintf(stderr, " -t n specifies a timeout of n"
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" seconds when connecting (default 2)\n");
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fprintf(stderr, " -p passwd specifies your password\n");
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return 1;
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}
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static int TimedOut = 0;
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static void
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Timeout(int Sig)
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{
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TimedOut = 1;
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}
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#define REC_PASSWD (1)
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#define REC_SHOW (2)
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#define REC_VERBOSE (4)
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static char *passwd;
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static char *prompt;
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static char *
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GetPrompt(EditLine *e)
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{
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if (prompt == NULL)
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prompt = "";
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return prompt;
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}
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static int
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Receive(int fd, int display)
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{
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int Result;
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int len;
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char *last;
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prompt = Buffer;
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len = 0;
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while (Result = read(fd, Buffer+len, sizeof(Buffer)-len-1), Result != -1) {
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if (Result == 0 && errno != EINTR) {
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Result = -1;
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break;
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}
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len += Result;
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Buffer[len] = '\0';
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if (len > 2 && !strcmp(Buffer+len-2, "> ")) {
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prompt = strrchr(Buffer, '\n');
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if (display & (REC_SHOW|REC_VERBOSE)) {
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if (display & REC_VERBOSE)
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last = Buffer+len-1;
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else
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last = prompt;
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if (last) {
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last++;
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write(1, Buffer, last-Buffer);
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}
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}
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prompt = prompt == NULL ? Buffer : prompt+1;
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for (last = Buffer+len-2; last > Buffer && *last != ' '; last--)
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;
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if (last > Buffer+3 && !strncmp(last-3, " on", 3)) {
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/* a password is required ! */
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if (display & REC_PASSWD) {
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/* password time */
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if (!passwd)
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passwd = getpass("Password: ");
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sprintf(Buffer, "passwd %s\n", passwd);
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memset(passwd, '\0', strlen(passwd));
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if (display & REC_VERBOSE)
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write(1, Buffer, strlen(Buffer));
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write(fd, Buffer, strlen(Buffer));
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memset(Buffer, '\0', strlen(Buffer));
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return Receive(fd, display & ~REC_PASSWD);
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}
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Result = 1;
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} else
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Result = 0;
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break;
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}
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if (len == sizeof Buffer - 1) {
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int flush;
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if ((last = strrchr(Buffer, '\n')) == NULL)
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/* Yeuch - this is one mother of a line ! */
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flush = sizeof Buffer / 2;
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else
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flush = last - Buffer + 1;
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write(1, Buffer, flush);
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strcpy(Buffer, Buffer + flush);
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len -= flush;
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}
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}
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return Result;
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}
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static int data = -1;
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static jmp_buf pppdead;
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static void
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check_fd(int sig)
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{
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if (data != -1) {
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struct timeval t;
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fd_set f;
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static char buf[LINELEN];
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int len;
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FD_ZERO(&f);
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FD_SET(data, &f);
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t.tv_sec = t.tv_usec = 0;
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if (select(data+1, &f, NULL, NULL, &t) > 0) {
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len = read(data, buf, sizeof buf);
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if (len > 0)
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write(1, buf, len);
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else
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longjmp(pppdead, -1);
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}
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}
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}
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static const char *
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smartgets(EditLine *e, int *count, int fd)
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{
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const char *result;
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data = fd;
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signal(SIGALRM, check_fd);
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ualarm(500000, 500000);
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result = setjmp(pppdead) ? NULL : el_gets(e, count);
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ualarm(0,0);
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signal(SIGALRM, SIG_DFL);
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data = -1;
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return result;
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}
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int
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main(int argc, char **argv)
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{
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struct servent *s;
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struct hostent *h;
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struct sockaddr *sock;
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struct sockaddr_in ifsin;
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struct sockaddr_un ifsun;
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int socksz, arg, fd, len, verbose;
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unsigned TimeoutVal;
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char *DoneWord = "x", *next, *start;
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struct sigaction act, oact;
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verbose = 0;
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TimeoutVal = 2;
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for (arg = 1; arg < argc; arg++)
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if (*argv[arg] == '-') {
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for (start = argv[arg] + 1; *start; start++)
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switch (*start) {
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case 't':
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TimeoutVal = (unsigned)atoi
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(start[1] ? start + 1 : argv[++arg]);
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start = DoneWord;
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break;
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case 'v':
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verbose = REC_VERBOSE;
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break;
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case 'p':
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passwd = (start[1] ? start + 1 : argv[++arg]);
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start = DoneWord;
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break;
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default:
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return Usage();
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}
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}
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else
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break;
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if (argc < arg + 1)
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return Usage();
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if (*argv[arg] == '/') {
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sock = (struct sockaddr *)&ifsun;
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socksz = sizeof ifsun;
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memset(&ifsun, '\0', sizeof ifsun);
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ifsun.sun_len = strlen(argv[arg]);
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if (ifsun.sun_len > sizeof ifsun.sun_path - 1) {
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fprintf(stderr, "%s: Path too long\n", argv[arg]);
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return 1;
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}
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ifsun.sun_family = AF_LOCAL;
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strcpy(ifsun.sun_path, argv[arg]);
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if (fd = socket(AF_LOCAL, SOCK_STREAM, 0), fd < 0) {
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fprintf(stderr, "Cannot create local domain socket\n");
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return 2;
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}
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} else {
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char *port, *host, *colon;
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int hlen;
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colon = strchr(argv[arg], ':');
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if (colon) {
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port = colon + 1;
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*colon = '\0';
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host = argv[arg];
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} else {
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port = argv[arg];
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host = "127.0.0.1";
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}
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sock = (struct sockaddr *)&ifsin;
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socksz = sizeof ifsin;
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hlen = strlen(host);
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memset(&ifsin, '\0', sizeof ifsin);
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if (strspn(host, "0123456789.") == hlen) {
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if (!inet_aton(host, &ifsin.sin_addr)) {
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fprintf(stderr, "Cannot translate %s\n", host);
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return 1;
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}
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} else if ((h = gethostbyname(host)) == 0) {
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fprintf(stderr, "Cannot resolve %s\n", host);
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return 1;
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}
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else
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ifsin.sin_addr.s_addr = *(u_long *)h->h_addr_list[0];
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if (colon)
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*colon = ':';
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if (strspn(port, "0123456789") == strlen(port))
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ifsin.sin_port = htons(atoi(port));
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else if (s = getservbyname(port, "tcp"), !s) {
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fprintf(stderr, "%s isn't a valid port or service!\n", port);
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return Usage();
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}
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else
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ifsin.sin_port = s->s_port;
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ifsin.sin_len = sizeof(ifsin);
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ifsin.sin_family = AF_INET;
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if (fd = socket(AF_INET, SOCK_STREAM, 0), fd < 0) {
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fprintf(stderr, "Cannot create internet socket\n");
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return 2;
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}
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}
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TimedOut = 0;
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if (TimeoutVal) {
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act.sa_handler = Timeout;
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sigemptyset(&act.sa_mask);
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act.sa_flags = 0;
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sigaction(SIGALRM, &act, &oact);
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alarm(TimeoutVal);
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}
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if (connect(fd, sock, socksz) < 0) {
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if (TimeoutVal) {
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alarm(0);
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sigaction(SIGALRM, &oact, 0);
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}
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if (TimedOut)
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fputs("Timeout: ", stderr);
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fprintf(stderr, "Cannot connect to socket %s\n", argv[arg]);
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close(fd);
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return 3;
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}
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if (TimeoutVal) {
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alarm(0);
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sigaction(SIGALRM, &oact, 0);
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}
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len = 0;
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Command[sizeof(Command)-1] = '\0';
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for (arg++; arg < argc; arg++) {
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if (len && len < sizeof(Command)-1)
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strcpy(Command+len++, " ");
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strncpy(Command+len, argv[arg], sizeof(Command)-len-1);
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len += strlen(Command+len);
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}
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switch (Receive(fd, verbose | REC_PASSWD))
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{
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case 1:
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fprintf(stderr, "Password incorrect\n");
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break;
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case 0:
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if (len == 0) {
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EditLine *edit;
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History *hist;
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const char *l, *env;
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int size;
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hist = history_init();
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if ((env = getenv("EL_SIZE"))) {
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size = atoi(env);
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if (size < 0)
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size = 20;
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} else
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size = 20;
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history(hist, H_EVENT, size);
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edit = el_init("pppctl", stdin, stdout);
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el_source(edit, NULL);
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el_set(edit, EL_PROMPT, GetPrompt);
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if ((env = getenv("EL_EDITOR"))) {
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if (!strcmp(env, "vi"))
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el_set(edit, EL_EDITOR, "vi");
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else if (!strcmp(env, "emacs"))
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el_set(edit, EL_EDITOR, "emacs");
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}
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el_set(edit, EL_SIGNAL, 1);
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el_set(edit, EL_HIST, history, (const char *)hist);
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while ((l = smartgets(edit, &len, fd))) {
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if (len > 1)
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history(hist, H_ENTER, l);
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write(fd, l, len);
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if (Receive(fd, REC_SHOW) != 0)
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break;
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}
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fprintf(stderr, "Connection closed\n");
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el_end(edit);
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history_end(hist);
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} else {
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start = Command;
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do {
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next = strchr(start, ';');
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while (*start == ' ' || *start == '\t')
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start++;
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if (next)
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*next = '\0';
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strcpy(Buffer, start);
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Buffer[sizeof(Buffer)-2] = '\0';
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strcat(Buffer, "\n");
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if (verbose)
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write(1, Buffer, strlen(Buffer));
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write(fd, Buffer, strlen(Buffer));
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if (Receive(fd, verbose | REC_SHOW) != 0) {
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fprintf(stderr, "Connection closed\n");
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break;
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}
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if (next)
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start = ++next;
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} while (next && *next);
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if (verbose)
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puts("");
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}
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break;
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default:
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fprintf(stderr, "ppp is not responding\n");
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break;
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}
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close(fd);
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return 0;
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}
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