summaryrefslogtreecommitdiff
path: root/src/prompt.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/prompt.c')
-rw-r--r--src/prompt.c574
1 files changed, 574 insertions, 0 deletions
diff --git a/src/prompt.c b/src/prompt.c
new file mode 100644
index 0000000..265d30a
--- /dev/null
+++ b/src/prompt.c
@@ -0,0 +1,574 @@
+/*-
+ * Copyright (c) 1998 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: src/usr.sbin/ppp/prompt.c,v 1.31.26.1 2010/12/21 17:10:29 kensmith Exp $
+ */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/fcntl.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "layer.h"
+#include "defs.h"
+#include "timer.h"
+#include "command.h"
+#include "log.h"
+#include "descriptor.h"
+#include "prompt.h"
+#include "fsm.h"
+#include "auth.h"
+#include "iplist.h"
+#include "throughput.h"
+#include "slcompress.h"
+#include "mbuf.h"
+#include "lqr.h"
+#include "hdlc.h"
+#include "lcp.h"
+#include "ncpaddr.h"
+#include "ipcp.h"
+#include "filter.h"
+#include "async.h"
+#include "ccp.h"
+#include "link.h"
+#include "physical.h"
+#include "mp.h"
+#ifndef NORADIUS
+#include "radius.h"
+#endif
+#include "ipv6cp.h"
+#include "ncp.h"
+#include "bundle.h"
+#include "chat.h"
+#include "chap.h"
+#include "cbcp.h"
+#include "datalink.h"
+#include "server.h"
+#include "main.h"
+
+static void
+prompt_Display(struct prompt *p)
+{
+ /* XXX: See Index2Nam() - should we only figure this out once ? */
+ static char shostname[MAXHOSTNAMELEN];
+ const char *pconnect, *pauth;
+
+ if (p->TermMode || !p->needprompt)
+ return;
+
+ p->needprompt = 0;
+
+ if (p->nonewline)
+ p->nonewline = 0;
+ else
+ fprintf(p->Term, "\n");
+
+ if (p->auth == LOCAL_AUTH)
+ pauth = " ON ";
+ else
+ pauth = " on ";
+
+ if (p->bundle->ncp.ipcp.fsm.state == ST_OPENED)
+ pconnect = "PPP";
+#ifndef NOINET6
+ else if (!Enabled(p->bundle, OPT_IPCP) &&
+ p->bundle->ncp.ipv6cp.fsm.state == ST_OPENED)
+ pconnect = "PPP";
+#endif
+ else if (bundle_Phase(p->bundle) == PHASE_NETWORK)
+ pconnect = "PPp";
+ else if (bundle_Phase(p->bundle) == PHASE_AUTHENTICATE)
+ pconnect = "Ppp";
+ else
+ pconnect = "ppp";
+
+ if (*shostname == '\0') {
+ char *dot;
+
+ if (gethostname(shostname, sizeof shostname) || *shostname == '\0')
+ strcpy(shostname, "localhost");
+ else if ((dot = strchr(shostname, '.')))
+ *dot = '\0';
+ }
+
+ fprintf(p->Term, "%s%s%s> ", pconnect, pauth, shostname);
+ fflush(p->Term);
+}
+
+static int
+prompt_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w __unused,
+ fd_set *e, int *n)
+{
+ struct prompt *p = descriptor2prompt(d);
+ int sets;
+
+ sets = 0;
+
+ if (!p->active)
+ return sets;
+
+ if (p->fd_in >= 0) {
+ if (r) {
+ FD_SET(p->fd_in, r);
+ log_Printf(LogTIMER, "prompt %s: fdset(r) %d\n", p->src.from, p->fd_in);
+ sets++;
+ }
+ if (e) {
+ FD_SET(p->fd_in, e);
+ log_Printf(LogTIMER, "prompt %s: fdset(e) %d\n", p->src.from, p->fd_in);
+ sets++;
+ }
+ if (sets && *n < p->fd_in + 1)
+ *n = p->fd_in + 1;
+ }
+
+ prompt_Display(p);
+
+ return sets;
+}
+
+static int
+prompt_IsSet(struct fdescriptor *d, const fd_set *fdset)
+{
+ struct prompt *p = descriptor2prompt(d);
+ return p->fd_in >= 0 && FD_ISSET(p->fd_in, fdset);
+}
+
+
+static void
+prompt_ShowHelp(struct prompt *p)
+{
+ prompt_Printf(p, "The following commands are available:\n");
+ prompt_Printf(p, " ~p\tEnter Packet mode\n");
+ prompt_Printf(p, " ~t\tShow timers\n");
+ prompt_Printf(p, " ~m\tShow memory map\n");
+ prompt_Printf(p, " ~.\tTerminate program\n");
+ prompt_Printf(p, " ~?\tThis help\n");
+}
+
+static void
+prompt_Read(struct fdescriptor *d, struct bundle *bundle,
+ const fd_set *fdset __unused)
+{
+ struct prompt *p = descriptor2prompt(d);
+ struct prompt *op;
+ int n;
+ char ch;
+ char linebuff[LINE_LEN];
+
+ if (p->TermMode == NULL) {
+ n = read(p->fd_in, linebuff, sizeof linebuff - 1);
+ if (n > 0) {
+ if (linebuff[n-1] == '\n')
+ linebuff[--n] = '\0';
+ else
+ linebuff[n] = '\0';
+ p->nonewline = 1; /* Maybe command_Decode does a prompt */
+ prompt_Required(p);
+ if (n) {
+ if ((op = log_PromptContext) == NULL)
+ log_PromptContext = p;
+ if (!command_Decode(bundle, linebuff, n, p, p->src.from))
+ prompt_Printf(p, "Syntax error\n");
+ log_PromptContext = op;
+ }
+ } else if (n <= 0) {
+ log_Printf(LogPHASE, "%s: Client connection closed.\n", p->src.from);
+ if (!p->owner)
+ Cleanup();
+ prompt_Destroy(p, 0);
+ }
+ return;
+ }
+
+ switch (p->TermMode->state) {
+ case DATALINK_CLOSED:
+ prompt_Printf(p, "Link lost, terminal mode.\n");
+ prompt_TtyCommandMode(p);
+ p->nonewline = 0;
+ prompt_Required(p);
+ return;
+
+ case DATALINK_READY:
+ break;
+
+ case DATALINK_OPEN:
+ prompt_Printf(p, "\nPacket mode detected.\n");
+ prompt_TtyCommandMode(p);
+ p->nonewline = 0;
+ /* We'll get a prompt because of our status change */
+ /* FALLTHROUGH */
+
+ default:
+ /* Wait 'till we're in a state we care about */
+ return;
+ }
+
+ /*
+ * We are in terminal mode, decode special sequences
+ */
+ n = read(p->fd_in, &ch, 1);
+ log_Printf(LogDEBUG, "Got %d bytes (reading from the terminal)\n", n);
+
+ if (n > 0) {
+ switch (p->readtilde) {
+ case 0:
+ if (ch == '~')
+ p->readtilde = 1;
+ else
+ if (physical_Write(p->TermMode->physical, &ch, n) < 0) {
+ log_Printf(LogWARN, "error writing to modem: %s\n", strerror(errno));
+ prompt_TtyCommandMode(p);
+ }
+ break;
+ case 1:
+ switch (ch) {
+ case '?':
+ prompt_ShowHelp(p);
+ break;
+ case 'p':
+ datalink_Up(p->TermMode, 0, 1);
+ prompt_Printf(p, "\nPacket mode.\n");
+ prompt_TtyCommandMode(p);
+ break;
+ case '.':
+ prompt_TtyCommandMode(p);
+ p->nonewline = 0;
+ prompt_Required(p);
+ break;
+ case 't':
+ timer_Show(0, p);
+ break;
+ case 'm':
+ {
+ struct cmdargs arg;
+
+ arg.cmdtab = NULL;
+ arg.cmd = NULL;
+ arg.argc = 0;
+ arg.argn = 0;
+ arg.argv = NULL;
+ arg.bundle = bundle;
+ arg.cx = p->TermMode;
+ arg.prompt = p;
+
+ mbuf_Show(&arg);
+ }
+ break;
+ default:
+ if (physical_Write(p->TermMode->physical, &ch, n) < 0) {
+ log_Printf(LogWARN, "error writing to modem: %s\n", strerror(errno));
+ prompt_TtyCommandMode(p);
+ }
+ break;
+ }
+ p->readtilde = 0;
+ break;
+ }
+ }
+}
+
+static int
+prompt_Write(struct fdescriptor *d __unused, struct bundle *bundle __unused,
+ const fd_set *fdset __unused)
+{
+ /* We never want to write here ! */
+ log_Printf(LogALERT, "prompt_Write: Internal error: Bad call !\n");
+ return 0;
+}
+
+struct prompt *
+prompt_Create(struct server *s, struct bundle *bundle, int fd)
+{
+ struct prompt *p = (struct prompt *)malloc(sizeof(struct prompt));
+
+ if (p != NULL) {
+ p->desc.type = PROMPT_DESCRIPTOR;
+ p->desc.UpdateSet = prompt_UpdateSet;
+ p->desc.IsSet = prompt_IsSet;
+ p->desc.Read = prompt_Read;
+ p->desc.Write = prompt_Write;
+
+ if (fd == PROMPT_STD) {
+ char *tty = ttyname(STDIN_FILENO);
+
+ if (!tty) {
+ free(p);
+ return NULL;
+ }
+ p->fd_in = STDIN_FILENO;
+ p->fd_out = STDOUT_FILENO;
+ p->Term = stdout;
+ p->owner = NULL;
+ p->auth = LOCAL_AUTH;
+ p->src.type = "Controller";
+ strncpy(p->src.from, tty, sizeof p->src.from - 1);
+ p->src.from[sizeof p->src.from - 1] = '\0';
+ tcgetattr(p->fd_in, &p->oldtio); /* Save original tty mode */
+ } else {
+ p->fd_in = p->fd_out = fd;
+ p->Term = fdopen(fd, "a+");
+ p->owner = s;
+ p->auth = *s->cfg.passwd ? LOCAL_NO_AUTH : LOCAL_AUTH;
+ p->src.type = "unknown";
+ *p->src.from = '\0';
+ }
+ p->TermMode = NULL;
+ p->nonewline = 1;
+ p->needprompt = 1;
+ p->readtilde = 0;
+ p->bundle = bundle;
+ log_RegisterPrompt(p);
+ }
+
+ return p;
+}
+
+void
+prompt_Destroy(struct prompt *p, int verbose)
+{
+ if (p) {
+ if (p->Term != stdout) {
+ fclose(p->Term);
+ close(p->fd_in);
+ if (p->fd_out != p->fd_in)
+ close(p->fd_out);
+ if (verbose)
+ log_Printf(LogPHASE, "%s: Client connection dropped.\n", p->src.from);
+ } else
+ prompt_TtyOldMode(p);
+
+ log_UnRegisterPrompt(p);
+ free(p);
+ }
+}
+
+void
+prompt_Printf(struct prompt *p, const char *fmt,...)
+{
+ if (p && p->active) {
+ va_list ap;
+
+ va_start(ap, fmt);
+ prompt_vPrintf(p, fmt, ap);
+ va_end(ap);
+ }
+}
+
+void
+prompt_vPrintf(struct prompt *p, const char *fmt, va_list ap)
+{
+ if (p && p->active) {
+ char nfmt[LINE_LEN];
+ const char *pfmt;
+
+ if (p->TermMode) {
+ /* Stuff '\r' in front of '\n' 'cos we're in raw mode */
+ size_t len = strlen(fmt);
+
+ if (len && len < sizeof nfmt - 1 && fmt[len-1] == '\n' &&
+ (len == 1 || fmt[len-2] != '\r')) {
+ strcpy(nfmt, fmt);
+ strcpy(nfmt + len - 1, "\r\n");
+ pfmt = nfmt;
+ } else
+ pfmt = fmt;
+ } else
+ pfmt = fmt;
+ vfprintf(p->Term, pfmt, ap);
+ fflush(p->Term);
+ p->nonewline = 1;
+ }
+}
+
+void
+prompt_TtyInit(struct prompt *p)
+{
+ int stat, fd = p ? p->fd_in : STDIN_FILENO;
+ struct termios newtio;
+
+ stat = fcntl(fd, F_GETFL, 0);
+ if (stat > 0) {
+ stat |= O_NONBLOCK;
+ fcntl(fd, F_SETFL, stat);
+ }
+
+ if (p)
+ newtio = p->oldtio;
+ else
+ tcgetattr(fd, &newtio);
+
+ newtio.c_lflag &= ~(ECHO | ISIG | ICANON);
+ newtio.c_iflag = 0;
+ newtio.c_oflag &= ~OPOST;
+ if (!p)
+ newtio.c_cc[VINTR] = _POSIX_VDISABLE;
+ newtio.c_cc[VMIN] = 1;
+ newtio.c_cc[VTIME] = 0;
+ newtio.c_cflag |= CS8;
+ tcsetattr(fd, TCSANOW, &newtio);
+ if (p)
+ p->comtio = newtio;
+}
+
+/*
+ * Set tty into command mode. We allow canonical input and echo processing.
+ */
+void
+prompt_TtyCommandMode(struct prompt *p)
+{
+ struct termios newtio;
+ int stat;
+
+ tcgetattr(p->fd_in, &newtio);
+ newtio.c_lflag |= (ECHO | ISIG | ICANON);
+ newtio.c_iflag = p->oldtio.c_iflag;
+ newtio.c_oflag |= OPOST;
+ tcsetattr(p->fd_in, TCSADRAIN, &newtio);
+
+ stat = fcntl(p->fd_in, F_GETFL, 0);
+ if (stat > 0) {
+ stat |= O_NONBLOCK;
+ fcntl(p->fd_in, F_SETFL, stat);
+ }
+
+ p->TermMode = NULL;
+}
+
+/*
+ * Set tty into terminal mode which is used while we invoke term command.
+ */
+void
+prompt_TtyTermMode(struct prompt *p, struct datalink *dl)
+{
+ int stat;
+
+ if (p->Term == stdout)
+ tcsetattr(p->fd_in, TCSADRAIN, &p->comtio);
+
+ stat = fcntl(p->fd_in, F_GETFL, 0);
+ if (stat > 0) {
+ stat &= ~O_NONBLOCK;
+ fcntl(p->fd_in, F_SETFL, stat);
+ }
+ p->TermMode = dl;
+}
+
+void
+prompt_TtyOldMode(struct prompt *p)
+{
+ int stat;
+
+ stat = fcntl(p->fd_in, F_GETFL, 0);
+ if (stat > 0) {
+ stat &= ~O_NONBLOCK;
+ fcntl(p->fd_in, F_SETFL, stat);
+ }
+
+ if (p->Term == stdout)
+ tcsetattr(p->fd_in, TCSADRAIN, &p->oldtio);
+}
+
+pid_t
+prompt_pgrp(struct prompt *p)
+{
+ return tcgetpgrp(p->fd_in);
+}
+
+int
+PasswdCommand(struct cmdargs const *arg)
+{
+ const char *pass;
+
+ if (!arg->prompt) {
+ log_Printf(LogWARN, "passwd: Cannot specify without a prompt\n");
+ return 0;
+ }
+
+ if (arg->prompt->owner == NULL) {
+ log_Printf(LogWARN, "passwd: Not required\n");
+ return 0;
+ }
+
+ if (arg->argc == arg->argn)
+ pass = "";
+ else if (arg->argc > arg->argn+1)
+ return -1;
+ else
+ pass = arg->argv[arg->argn];
+
+ if (!strcmp(arg->prompt->owner->cfg.passwd, pass))
+ arg->prompt->auth = LOCAL_AUTH;
+ else
+ arg->prompt->auth = LOCAL_NO_AUTH;
+
+ return 0;
+}
+
+static struct pppTimer bgtimer;
+
+static void
+prompt_TimedContinue(void *v)
+{
+ prompt_Continue((struct prompt *)v);
+}
+
+void
+prompt_Continue(struct prompt *p)
+{
+ timer_Stop(&bgtimer);
+ if (getpgrp() == prompt_pgrp(p)) {
+ prompt_TtyCommandMode(p);
+ p->nonewline = 1;
+ prompt_Required(p);
+ log_ActivatePrompt(p);
+ } else if (!p->owner) {
+ bgtimer.func = prompt_TimedContinue;
+ bgtimer.name = "prompt bg";
+ bgtimer.load = SECTICKS;
+ bgtimer.arg = p;
+ timer_Start(&bgtimer);
+ }
+}
+
+void
+prompt_Suspend(struct prompt *p)
+{
+ if (getpgrp() == prompt_pgrp(p)) {
+ prompt_TtyOldMode(p);
+ log_DeactivatePrompt(p);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-02 21:24:48 +0000