2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/types.h>
32 #include <sys/socket.h>
33 #include <netinet/in.h>
34 #include <arpa/inet.h>
42 #include <semaphore.h>
54 /* Data passed to the threads we create */
56 EditLine *edit; /* libedit stuff */
57 History *hist; /* libedit stuff */
58 pthread_t trm; /* Terminal thread (for pthread_kill()) */
59 int ppp; /* ppp descriptor */
62 /* Flags passed to Receive() */
63 #define REC_PASSWD (1) /* Handle a password request from ppp */
64 #define REC_SHOW (2) /* Show everything except prompts */
65 #define REC_VERBOSE (4) /* Show everything */
68 static char *prompt; /* Tell libedit what the current prompt is */
69 static int data = -1; /* setjmp() has been done when data != -1 */
70 static jmp_buf pppdead; /* Jump the Terminal thread out of el_gets() */
71 static int timetogo; /* Tell the Monitor thread to exit */
72 static sem_t sem_select; /* select() co-ordination between threads */
73 static int TimedOut; /* Set if our connect() timed out */
74 static int want_sem_post; /* Need to let the Monitor thread in ? */
77 * How to use pppctl...
82 fprintf(stderr, "usage: pppctl [-v] [-t n] [-p passwd] "
83 "Port|LocalSock [command[;command]...]\n");
84 fprintf(stderr, " -v tells pppctl to output all"
86 fprintf(stderr, " -t n specifies a timeout of n"
87 " seconds when connecting (default 2)\n");
88 fprintf(stderr, " -p passwd specifies your password\n");
93 * Handle the SIGALRM received due to a connect() timeout.
102 * A callback routine for libedit to find out what the current prompt is.
103 * All the work is done in Receive() below.
106 GetPrompt(EditLine *e)
114 * Receive data from the ppp descriptor.
115 * We also handle password prompts here (if asked via the `display' arg)
116 * and buffer what our prompt looks like (via the `prompt' global).
119 Receive(int fd, int display)
121 static char Buffer[LINELEN];
136 while (Result = read(fd, Buffer+len, sizeof(Buffer)-len-1), Result != -1) {
143 if (len > 2 && !strcmp(Buffer+len-2, "> ")) {
144 prompt = strrchr(Buffer, '\n');
145 if (display & (REC_SHOW|REC_VERBOSE)) {
146 if (display & REC_VERBOSE)
152 write(STDOUT_FILENO, Buffer, last-Buffer);
155 prompt = prompt == NULL ? Buffer : prompt+1;
156 for (last = Buffer+len-2; last > Buffer && *last != ' '; last--)
158 if (last > Buffer+3 && !strncmp(last-3, " on", 3)) {
159 /* a password is required ! */
160 if (display & REC_PASSWD) {
163 passwd = getpass("Password: ");
164 sprintf(Buffer, "passwd %s\n", passwd);
165 memset(passwd, '\0', strlen(passwd));
166 if (display & REC_VERBOSE)
167 write(STDOUT_FILENO, Buffer, strlen(Buffer));
168 write(fd, Buffer, strlen(Buffer));
169 memset(Buffer, '\0', strlen(Buffer));
170 return Receive(fd, display & ~REC_PASSWD);
178 if (len == sizeof Buffer - 1) {
180 if ((last = strrchr(Buffer, '\n')) == NULL)
181 /* Yeuch - this is one mother of a line ! */
182 flush = sizeof Buffer / 2;
184 flush = last - Buffer + 1;
185 write(STDOUT_FILENO, Buffer, flush);
186 strcpy(Buffer, Buffer + flush);
189 if ((Result = select(fd + 1, &f, NULL, NULL, &t)) <= 0) {
190 err = Result == -1 ? errno : 0;
192 write(STDOUT_FILENO, Buffer, len);
203 * Handle being told by the Monitor thread that there's data to be read
204 * on the ppp descriptor.
206 * Note, this is a signal handler - be careful of what we do !
209 InputHandler(int sig)
211 static char buf[LINELEN];
219 t.tv_sec = t.tv_usec = 0;
221 if (select(data + 1, &f, NULL, NULL, &t) > 0) {
222 len = read(data, buf, sizeof buf);
225 write(STDOUT_FILENO, buf, len);
227 longjmp(pppdead, -1);
230 sem_post(&sem_select);
232 /* Don't let the Monitor thread in 'till we've set ``data'' up again */
237 * This is a simple wrapper for el_gets(), allowing our SIGUSR1 signal
238 * handler (above) to take effect only after we've done a setjmp().
240 * We don't want it to do anything outside of here as we're going to
241 * service the ppp descriptor anyway.
244 SmartGets(EditLine *e, int *count, int fd)
253 /* Let the Monitor thread in again */
254 sem_post(&sem_select);
255 result = el_gets(e, count);
264 * The Terminal thread entry point.
266 * The bulk of the interactive work is done here. We read the terminal,
267 * write the results to our ppp descriptor and read the results back.
269 * While reading the terminal (using el_gets()), it's possible to take
270 * a SIGUSR1 from the Monitor thread, telling us that the ppp descriptor
271 * has some data. The data is read and displayed by the signal handler
277 struct sigaction act, oact;
278 struct thread_data *td;
282 HistEvent hev = { 0, "" };
285 act.sa_handler = InputHandler;
286 sigemptyset(&act.sa_mask);
287 act.sa_flags = SA_RESTART;
288 sigaction(SIGUSR1, &act, &oact);
290 td = (struct thread_data *)v;
293 while ((l = SmartGets(td->edit, &len, td->ppp))) {
296 history(td->hist, H_ENTER, l);
298 history(td->hist, &hev, H_ENTER, l);
300 write(td->ppp, l, len);
301 if (Receive(td->ppp, REC_SHOW) != 0)
309 * The Monitor thread entry point.
311 * This thread simply monitors our ppp descriptor. When there's something
312 * to read, a SIGUSR1 is sent to the Terminal thread.
314 * sem_select() is used by the Terminal thread to keep us from sending
315 * flurries of SIGUSR1s, and is used from the main thread to wake us up
316 * when it's time to exit.
321 struct thread_data *td;
325 td = (struct thread_data *)v;
329 sem_wait(&sem_select);
331 if ((ret = select(td->ppp + 1, &f, NULL, NULL, NULL)) > 0) {
332 pthread_kill(td->trm, SIGUSR1);
333 sem_wait(&sem_select);
340 sockaddr_ntop(const struct sockaddr *sa)
343 static char addrbuf[INET6_ADDRSTRLEN];
345 switch (sa->sa_family) {
347 addr = &((const struct sockaddr_in *)sa)->sin_addr;
350 addr = &((const struct sockaddr_un *)sa)->sun_path;
353 addr = &((const struct sockaddr_in6 *)sa)->sin6_addr;
358 inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf));
363 * Connect to ppp using either a local domain socket or a tcp socket.
365 * If we're given arguments, process them and quit, otherwise create two
366 * threads to handle interactive mode.
369 main(int argc, char **argv)
371 struct sockaddr_un ifsun;
372 int n, arg, fd, len, verbose, save_errno, hide1, hide1off, hide2;
374 char *DoneWord = "x", *next, *start;
375 struct sigaction act, oact;
378 char Command[LINELEN];
379 char Buffer[LINELEN];
383 hide1 = hide1off = hide2 = 0;
385 for (arg = 1; arg < argc; arg++)
386 if (*argv[arg] == '-') {
387 for (start = argv[arg] + 1; *start; start++)
390 TimeoutVal = (unsigned)atoi
391 (start[1] ? start + 1 : argv[++arg]);
396 verbose = REC_VERBOSE;
402 hide1off = start - argv[arg];
406 hide1off = start - argv[arg];
407 passwd = argv[++arg];
428 for (harg = pos = 0; harg < argc; harg++)
429 if (harg == 0 || harg != hide2) {
430 if (harg == 0 || harg != hide1)
431 n = snprintf(title + pos, sizeof title - pos, "%s%s",
432 harg ? " " : "", argv[harg]);
433 else if (hide1off > 1)
434 n = snprintf(title + pos, sizeof title - pos, " %.*s",
435 hide1off, argv[harg]);
438 if (n < 0 || n >= sizeof title - pos)
443 setproctitle("-%s", title);
445 setproctitle("%s", title);
449 if (*argv[arg] == '/') {
450 memset(&ifsun, '\0', sizeof ifsun);
451 ifsun.sun_len = strlen(argv[arg]);
452 if (ifsun.sun_len > sizeof ifsun.sun_path - 1) {
453 warnx("%s: path too long", argv[arg]);
456 ifsun.sun_family = AF_LOCAL;
457 strcpy(ifsun.sun_path, argv[arg]);
459 if (fd = socket(AF_LOCAL, SOCK_STREAM, 0), fd < 0) {
460 warnx("cannot create local domain socket");
463 if (connect(fd, (struct sockaddr *)&ifsun, sizeof(ifsun)) < 0) {
465 warn("cannot connect to socket %s", argv[arg]);
467 warnx("cannot connect to socket %s", argv[arg]);
472 char *addr, *p, *port;
474 struct addrinfo hints, *res, *pai;
476 char local[] = "localhost";
479 if (addr[strspn(addr, "0123456789")] == '\0') {
480 /* port on local machine */
483 } else if (*addr == '[') {
485 if ((p = strchr(addr, ']')) == NULL) {
486 warnx("%s: mismatched '['", addr);
492 warnx("%s: missing port", addr);
498 p = addr + strcspn(addr, ":");
500 warnx("%s: missing port", addr);
506 memset(&hints, 0, sizeof(hints));
507 hints.ai_socktype = SOCK_STREAM;
508 gai = getaddrinfo(addr, port, &hints, &res);
510 warnx("%s: %s", addr, gai_strerror(gai));
513 for (pai = res; pai != NULL; pai = pai->ai_next) {
514 if (fd = socket(pai->ai_family, pai->ai_socktype,
515 pai->ai_protocol), fd < 0) {
516 warnx("cannot create socket");
521 act.sa_handler = Timeout;
522 sigemptyset(&act.sa_mask);
524 sigaction(SIGALRM, &act, &oact);
527 if (connect(fd, pai->ai_addr, pai->ai_addrlen) == 0)
532 sigaction(SIGALRM, &oact, 0);
535 caddr = sockaddr_ntop(pai->ai_addr);
539 warnx("timeout: cannot connect to %s", caddr);
542 warn("cannot connect to %s", caddr);
544 warnx("cannot connect to %s", caddr);
553 sigaction(SIGALRM, &oact, 0);
558 Command[sizeof(Command)-1] = '\0';
559 for (arg++; arg < argc; arg++) {
560 if (len && len < sizeof(Command)-1)
561 strcpy(Command+len++, " ");
562 strncpy(Command+len, argv[arg], sizeof(Command)-len-1);
563 len += strlen(Command+len);
566 switch (Receive(fd, verbose | REC_PASSWD)) {
568 fprintf(stderr, "Password incorrect\n");
574 struct thread_data td;
578 HistEvent hev = { 0, "" };
581 td.hist = history_init();
582 if ((env = getenv("EL_SIZE"))) {
589 history(td.hist, H_EVENT, size);
590 td.edit = el_init("pppctl", stdin, stdout);
592 history(td.hist, &hev, H_SETSIZE, size);
593 td.edit = el_init("pppctl", stdin, stdout, stderr);
595 el_source(td.edit, NULL);
596 el_set(td.edit, EL_PROMPT, GetPrompt);
597 if ((env = getenv("EL_EDITOR"))) {
598 if (!strcmp(env, "vi"))
599 el_set(td.edit, EL_EDITOR, "vi");
600 else if (!strcmp(env, "emacs"))
601 el_set(td.edit, EL_EDITOR, "emacs");
603 el_set(td.edit, EL_SIGNAL, 1);
604 el_set(td.edit, EL_HIST, history, (const char *)td.hist);
610 * We create two threads. The Terminal thread does all the
611 * work while the Monitor thread simply tells the Terminal
612 * thread when ``fd'' becomes readable. The telling is done
613 * by sending a SIGUSR1 to the Terminal thread. The
614 * sem_select semaphore is used to prevent the monitor
615 * thread from firing excessive signals at the Terminal
616 * thread (it's abused for exit handling too - see below).
618 * The Terminal thread never uses td.trm !
620 sem_init(&sem_select, 0, 0);
622 pthread_create(&td.trm, NULL, Terminal, &td);
623 pthread_create(&mon, NULL, Monitor, &td);
625 /* Wait for the terminal thread to finish */
626 pthread_join(td.trm, &thread_ret);
627 fprintf(stderr, "Connection closed\n");
629 /* Get rid of the monitor thread by abusing sem_select */
633 sem_post(&sem_select);
634 pthread_join(mon, &thread_ret);
636 /* Restore our terminal and release resources */
638 history_end(td.hist);
639 sem_destroy(&sem_select);
643 next = strchr(start, ';');
644 while (*start == ' ' || *start == '\t')
648 strcpy(Buffer, start);
649 Buffer[sizeof(Buffer)-2] = '\0';
650 strcat(Buffer, "\n");
652 write(STDOUT_FILENO, Buffer, strlen(Buffer));
653 write(fd, Buffer, strlen(Buffer));
654 if (Receive(fd, verbose | REC_SHOW) != 0) {
655 fprintf(stderr, "Connection closed\n");
660 } while (next && *next);
662 write(STDOUT_FILENO, "quit\n", 5);
663 write(fd, "quit\n", 5);
664 while (Receive(fd, verbose | REC_SHOW) == 0)
672 warnx("ppp is not responding");