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/* |
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* Copyright (c) 2007, OmniTI Computer Consulting, Inc. |
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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 are |
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* met: |
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* |
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* * 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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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* * Neither the name OmniTI Computer Consulting, Inc. nor the names |
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* of its contributors may be used to endorse or promote products |
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* derived from this software without specific prior written |
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* permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#include "noit_defines.h" |
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|
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#include <assert.h> |
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#include <stdio.h> |
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#include <unistd.h> |
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#ifdef HAVE_ALLOCA_H |
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#include <alloca.h> |
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#endif |
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#include <errno.h> |
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#ifdef HAVE_SYS_IOCTL_H |
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#include <sys/ioctl.h> |
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#endif |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#ifdef HAVE_STROPTS_H |
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#include <stropts.h> |
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#endif |
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#ifdef HAVE_SYS_STREAM_H |
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#include <sys/stream.h> |
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#endif |
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#ifdef HAVE_TERMIOS_H |
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#include <termios.h> |
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#endif |
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#ifdef HAVE_PTY_H |
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#include <pty.h> |
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#endif |
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#ifdef HAVE_UTIL_H |
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#include <util.h> |
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#endif |
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#ifdef HAVE_LIBUTIL_H |
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#include <libutil.h> |
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#endif |
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#include <arpa/telnet.h> |
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#include <signal.h> |
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|
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#include "eventer/eventer.h" |
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#include "utils/noit_log.h" |
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#include "noit_listener.h" |
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#include "noit_console.h" |
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#include "noit_tokenizer.h" |
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|
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#include "noitedit/sys.h" |
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#include "noitedit/el.h" |
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#include "noitedit/fcns.h" |
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#include "noitedit/map.h" |
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79 |
|
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static void |
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nc_telnet_cooker(noit_console_closure_t ncct) { |
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char *tmpbuf, *p, *n; |
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int r; |
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|
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tmpbuf = ncct->outbuf; |
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if(ncct->outbuf_len == 0) return; |
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|
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p = ncct->outbuf + ncct->outbuf_completed; |
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r = ncct->outbuf_len - ncct->outbuf_completed; |
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n = memchr(p, '\n', r); |
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/* No '\n'? Nothin' to do */ |
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if(!n) { |
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ncct->outbuf_cooked = ncct->outbuf_len; |
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return; |
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} |
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|
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/* Forget the outbuf -- it is now tmpbuf */ |
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ncct->outbuf = NULL; |
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ncct->outbuf_allocd = 0; |
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ncct->outbuf_len = 0; |
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ncct->outbuf_completed = 0; |
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ncct->outbuf_cooked = 0; |
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do { |
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nc_write(ncct, p, n-p); r -= n-p; |
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if(n == tmpbuf || *(n-1) != '\r') |
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nc_write(ncct, "\r", 1); |
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p = n; |
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n = memchr(p+1, '\n', r-1); |
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} while(n); |
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nc_write(ncct, p, r); |
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ncct->outbuf_cooked = ncct->outbuf_len; |
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free(tmpbuf); |
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} |
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int |
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nc_printf(noit_console_closure_t ncct, const char *fmt, ...) { |
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int len; |
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va_list arg; |
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va_start(arg, fmt); |
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len = nc_vprintf(ncct, fmt, arg); |
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va_end(arg); |
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return len; |
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} |
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int |
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nc_vprintf(noit_console_closure_t ncct, const char *fmt, va_list arg) { |
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#ifdef va_copy |
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va_list copy; |
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#endif |
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int lenwanted; |
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129 |
|
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if(!ncct->outbuf_allocd) { |
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ncct->outbuf = malloc(4096); |
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if(!ncct->outbuf) return 0; |
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ncct->outbuf_allocd = 4096; |
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} |
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while(1) { |
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char *newbuf; |
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#ifdef va_copy |
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va_copy(copy, arg); |
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lenwanted = vsnprintf(ncct->outbuf + ncct->outbuf_len, |
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ncct->outbuf_allocd - ncct->outbuf_len, |
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fmt, copy); |
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va_end(copy); |
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#else |
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lenwanted = vsnprintf(ncct->outbuf + ncct->outbuf_len, |
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ncct->outbuf_allocd - ncct->outbuf_len, |
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fmt, arg); |
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#endif |
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148 |
if(ncct->outbuf_len + lenwanted < ncct->outbuf_allocd) { |
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/* All went well, things are as we want them. */ |
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ncct->outbuf_len += lenwanted; |
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return lenwanted; |
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} |
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153 |
|
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/* We need to enlarge the buffer */ |
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lenwanted += ncct->outbuf_len; |
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lenwanted /= 4096; |
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lenwanted += 1; |
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lenwanted *= 4096; |
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newbuf = realloc(ncct->outbuf, lenwanted); |
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if(!newbuf) { |
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return 0; |
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} |
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ncct->outbuf = newbuf; |
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ncct->outbuf_allocd = lenwanted; |
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} |
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/* NOTREACHED */ |
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} |
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int |
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169 |
nc_write(noit_console_closure_t ncct, const void *buf, int len) { |
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170 |
if(!ncct->outbuf_allocd) { |
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ncct->outbuf = malloc(len); |
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if(!ncct->outbuf) return 0; |
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ncct->outbuf_allocd = len; |
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} |
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else if(ncct->outbuf_allocd < ncct->outbuf_len + len) { |
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char *newbuf; |
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newbuf = realloc(ncct->outbuf, ncct->outbuf_len + len); |
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if(!newbuf) return 0; |
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ncct->outbuf = newbuf; |
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} |
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memcpy(ncct->outbuf + ncct->outbuf_len, buf, len); |
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ncct->outbuf_len += len; |
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return len; |
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} |
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185 |
|
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static void |
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187 |
noit_console_userdata_free(void *data) { |
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noit_console_userdata_t *userdata = data; |
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if(userdata) { |
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if(userdata->name) free(userdata->name); |
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if(userdata->freefunc) |
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userdata->freefunc(userdata->data); |
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free(userdata); |
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} |
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} |
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void |
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197 |
noit_console_closure_free(noit_console_closure_t ncct) { |
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noit_log_stream_t lf; |
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if(ncct->el) el_end(ncct->el); |
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if(ncct->hist) history_end(ncct->hist); |
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if(ncct->pty_master >= 0) close(ncct->pty_master); |
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if(ncct->pty_slave >= 0) close(ncct->pty_slave); |
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if(ncct->outbuf) free(ncct->outbuf); |
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if(ncct->telnet) noit_console_telnet_free(ncct->telnet); |
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noit_hash_destroy(&ncct->userdata, NULL, noit_console_userdata_free); |
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while(ncct->state_stack) { |
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noit_console_state_stack_t *tmp; |
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tmp = ncct->state_stack; |
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ncct->state_stack = tmp->last; |
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free(tmp); |
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} |
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lf = noit_log_stream_find(ncct->feed_path); |
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noit_log_stream_remove(ncct->feed_path); |
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if(lf) { |
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noit_log_stream_free(lf); |
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} |
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free(ncct); |
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} |
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|
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noit_console_closure_t |
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noit_console_closure_alloc() { |
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noit_console_closure_t new_ncct; |
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new_ncct = calloc(1, sizeof(*new_ncct)); |
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noit_hash_init(&new_ncct->userdata); |
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noit_console_state_push_state(new_ncct, noit_console_state_initial()); |
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new_ncct->pty_master = -1; |
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new_ncct->pty_slave = -1; |
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return new_ncct; |
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} |
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230 |
|
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void |
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noit_console_userdata_set(struct __noit_console_closure *ncct, |
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const char *name, void *data, |
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state_userdata_free_func_t freefunc) { |
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noit_console_userdata_t *item; |
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item = calloc(1, sizeof(*item)); |
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item->name = strdup(name); |
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item->data = data; |
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item->freefunc = freefunc; |
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noit_hash_replace(&ncct->userdata, item->name, strlen(item->name), |
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item, NULL, noit_console_userdata_free); |
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} |
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243 |
|
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void * |
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245 |
noit_console_userdata_get(struct __noit_console_closure *ncct, |
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const char *name) { |
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247 |
void *vitem; |
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248 |
if(noit_hash_retrieve(&ncct->userdata, name, strlen(name), |
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&vitem)) |
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return ((noit_console_userdata_t *)vitem)->data; |
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return NULL; |
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} |
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253 |
|
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254 |
|
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255 |
int |
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256 |
noit_console_continue_sending(noit_console_closure_t ncct, |
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257 |
int *mask) { |
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258 |
int len; |
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259 |
eventer_t e = ncct->e; |
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260 |
if(!ncct->outbuf_len) return 0; |
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261 |
if(ncct->output_cooker) ncct->output_cooker(ncct); |
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262 |
while(ncct->outbuf_len > ncct->outbuf_completed) { |
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263 |
len = e->opset->write(e->fd, ncct->outbuf + ncct->outbuf_completed, |
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264 |
ncct->outbuf_len - ncct->outbuf_completed, |
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265 |
mask, e); |
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266 |
if(len < 0) { |
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267 |
if(errno == EAGAIN) return -1; |
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268 |
/* Do something else here? */ |
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269 |
return -1; |
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270 |
} |
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271 |
ncct->outbuf_completed += len; |
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272 |
} |
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273 |
len = ncct->outbuf_len; |
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274 |
free(ncct->outbuf); |
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275 |
ncct->outbuf = NULL; |
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276 |
ncct->outbuf_allocd = ncct->outbuf_len = |
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277 |
ncct->outbuf_completed = ncct->outbuf_cooked = 0; |
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278 |
return len; |
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279 |
} |
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280 |
|
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281 |
void |
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282 |
noit_console_dispatch(eventer_t e, const char *buffer, |
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283 |
noit_console_closure_t ncct) { |
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284 |
char **cmds; |
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285 |
HistEvent ev; |
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286 |
int i, cnt = 32; |
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287 |
|
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288 |
cmds = alloca(32 * sizeof(*cmds)); |
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289 |
i = noit_tokenize(buffer, cmds, &cnt); |
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290 |
|
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291 |
/* < 0 is an error, that's fine. We want it in the history to "fix" */ |
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292 |
/* > 0 means we had arguments, so let's put it in the history */ |
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293 |
/* 0 means nothing -- and that isn't worthy of history inclusion */ |
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294 |
if(i) history(ncct->hist, &ev, H_ENTER, buffer); |
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295 |
|
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296 |
if(i>cnt) nc_printf(ncct, "Command length too long.\n"); |
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297 |
else if(i<0) nc_printf(ncct, "Error at offset: %d\n", 0-i); |
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298 |
else noit_console_state_do(ncct, cnt, cmds); |
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299 |
} |
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300 |
|
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301 |
void |
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302 |
noit_console_motd(eventer_t e, acceptor_closure_t *ac, |
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303 |
noit_console_closure_t ncct) { |
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304 |
int ssl; |
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305 |
ssl = eventer_get_eventer_ssl_ctx(e) ? 1 : 0; |
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306 |
nc_printf(ncct, "noitd%s: %s\n", |
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307 |
ssl ? "(secure)" : "", |
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308 |
ac->remote_cn ? ac->remote_cn : "(no auth)"); |
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309 |
} |
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310 |
|
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311 |
int |
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312 |
allocate_pty(int *master, int *slave) { |
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313 |
#if defined(HAVE_OPENPTY) || (defined(HAVE_DECL_OPENPTY) && HAVE_DECL_OPENPTY != 0) |
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314 |
if(openpty(master, slave, NULL, NULL, NULL)) return -1; |
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315 |
#else |
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316 |
/* STREAMS... sigh */ |
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317 |
char *slavename; |
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318 |
extern char *ptsname(); |
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319 |
|
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320 |
*master = open("/dev/ptmx", O_RDWR); /* open master */ |
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321 |
if(*master < 0) return -1; |
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322 |
grantpt(*master); /* change permission of slave */ |
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323 |
unlockpt(*master); /* unlock slave */ |
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324 |
slavename = ptsname(*master); /* get name of slave */ |
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325 |
*slave = open(slavename, O_RDWR); /* open slave */ |
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326 |
if(*slave < 0) { |
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327 |
close(*master); |
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328 |
*master = -1; |
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329 |
return -1; |
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330 |
} |
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331 |
/* This is a bit backwards as we using the PTY backwards. |
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332 |
* We want to make the master a tty instead of the slave... odd, I know. |
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333 |
*/ |
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334 |
ioctl(*master, I_PUSH, "ptem"); /* push ptem */ |
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335 |
ioctl(*master, I_PUSH, "ldterm"); /* push ldterm*/ |
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336 |
#endif |
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337 |
if(eventer_set_fd_nonblocking(*master)) return -1; |
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338 |
noitL(noit_debug, "allocate_pty -> %d,%d\n", *master, *slave); |
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339 |
return 0; |
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340 |
} |
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341 |
|
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342 |
int |
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343 |
noit_console_handler(eventer_t e, int mask, void *closure, |
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344 |
struct timeval *now) { |
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345 |
int newmask = EVENTER_READ | EVENTER_EXCEPTION; |
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346 |
int keep_going; |
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347 |
acceptor_closure_t *ac = closure; |
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348 |
noit_console_closure_t ncct = ac->service_ctx; |
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349 |
|
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350 |
if(mask & EVENTER_EXCEPTION || (ncct && ncct->wants_shutdown)) { |
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351 |
socket_error: |
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352 |
/* Exceptions cause us to simply snip the connection */ |
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353 |
|
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354 |
/* This removes the log feed which is important to do before calling close */ |
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355 |
eventer_remove_fd(e->fd); |
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356 |
if(ncct) noit_console_closure_free(ncct); |
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357 |
if(ac) acceptor_closure_free(ac); |
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358 |
e->opset->close(e->fd, &newmask, e); |
---|
359 |
return 0; |
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360 |
} |
---|
361 |
|
---|
362 |
if(!ac->service_ctx) { |
---|
363 |
ncct = ac->service_ctx = noit_console_closure_alloc(); |
---|
364 |
} |
---|
365 |
if(!ncct->initialized) { |
---|
366 |
ncct->e = e; |
---|
367 |
if(allocate_pty(&ncct->pty_master, &ncct->pty_slave)) { |
---|
368 |
nc_printf(ncct, "Failed to open pty: %s\n", strerror(errno)); |
---|
369 |
ncct->wants_shutdown = 1; |
---|
370 |
goto socket_error; |
---|
371 |
} |
---|
372 |
else { |
---|
373 |
int i; |
---|
374 |
const char *line_protocol; |
---|
375 |
HistEvent ev; |
---|
376 |
|
---|
377 |
ncct->hist = history_init(); |
---|
378 |
history(ncct->hist, &ev, H_SETSIZE, 500); |
---|
379 |
ncct->el = el_init("noitd", ncct->pty_master, NULL, |
---|
380 |
e->fd, e, e->fd, e); |
---|
381 |
if(!ncct->el) goto socket_error; |
---|
382 |
if(el_set(ncct->el, EL_USERDATA, ncct)) { |
---|
383 |
noitL(noit_error, "Cannot set userdata on noitedit session\n"); |
---|
384 |
goto socket_error; |
---|
385 |
} |
---|
386 |
if(el_set(ncct->el, EL_EDITOR, "emacs")) |
---|
387 |
noitL(noit_error, "Cannot set emacs mode on console\n"); |
---|
388 |
if(el_set(ncct->el, EL_HIST, history, ncct->hist)) |
---|
389 |
noitL(noit_error, "Cannot set history on console\n"); |
---|
390 |
el_set(ncct->el, EL_ADDFN, "noit_complete", |
---|
391 |
"auto completion functions for noit", noit_edit_complete); |
---|
392 |
el_set(ncct->el, EL_BIND, "^I", "noit_complete", NULL); |
---|
393 |
for(i=EL_NUM_FCNS; i < ncct->el->el_map.nfunc; i++) { |
---|
394 |
if(ncct->el->el_map.func[i] == noit_edit_complete) { |
---|
395 |
ncct->noit_edit_complete_cmdnum = i; |
---|
396 |
break; |
---|
397 |
} |
---|
398 |
} |
---|
399 |
|
---|
400 |
if(!noit_hash_retr_str(ac->config, |
---|
401 |
"line_protocol", strlen("line_protocol"), |
---|
402 |
&line_protocol)) { |
---|
403 |
line_protocol = NULL; |
---|
404 |
} |
---|
405 |
if(line_protocol && !strcasecmp(line_protocol, "telnet")) { |
---|
406 |
ncct->telnet = noit_console_telnet_alloc(ncct); |
---|
407 |
ncct->output_cooker = nc_telnet_cooker; |
---|
408 |
} |
---|
409 |
noit_console_state_init(ncct); |
---|
410 |
} |
---|
411 |
snprintf(ncct->feed_path, sizeof(ncct->feed_path), "console/%d", e->fd); |
---|
412 |
noit_log_stream_new(ncct->feed_path, "noit_console", ncct->feed_path, |
---|
413 |
ncct, NULL); |
---|
414 |
noit_console_motd(e, ac, ncct); |
---|
415 |
ncct->initialized = 1; |
---|
416 |
} |
---|
417 |
|
---|
418 |
/* If we still have data to send back to the client, this will take |
---|
419 |
* care of that |
---|
420 |
*/ |
---|
421 |
if(noit_console_continue_sending(ncct, &newmask) < 0) { |
---|
422 |
if(ncct->wants_shutdown || errno != EAGAIN) goto socket_error; |
---|
423 |
return newmask | EVENTER_EXCEPTION; |
---|
424 |
} |
---|
425 |
|
---|
426 |
for(keep_going=1 ; keep_going ; ) { |
---|
427 |
int len, plen; |
---|
428 |
char sbuf[4096]; |
---|
429 |
const char *buffer; |
---|
430 |
|
---|
431 |
keep_going = 0; |
---|
432 |
|
---|
433 |
buffer = el_gets(ncct->el, &plen); |
---|
434 |
if(!el_eagain(ncct->el)) { |
---|
435 |
if(!buffer) { |
---|
436 |
buffer = "exit"; |
---|
437 |
plen = 4; |
---|
438 |
nc_write(ncct, "\n", 1); |
---|
439 |
} |
---|
440 |
keep_going++; |
---|
441 |
} |
---|
442 |
|
---|
443 |
len = e->opset->read(e->fd, sbuf, sizeof(sbuf)-1, &newmask, e); |
---|
444 |
if(len == 0 || (len < 0 && errno != EAGAIN)) { |
---|
445 |
eventer_remove_fd(e->fd); |
---|
446 |
if(ncct) noit_console_closure_free(ncct); |
---|
447 |
if(ac) acceptor_closure_free(ac); |
---|
448 |
e->opset->close(e->fd, &newmask, e); |
---|
449 |
return 0; |
---|
450 |
} |
---|
451 |
if(len > 0) { |
---|
452 |
keep_going++; |
---|
453 |
sbuf[len] = '\0'; |
---|
454 |
if(ncct->telnet) { |
---|
455 |
noit_console_telnet_telrcv(ncct, sbuf, len); |
---|
456 |
ptyflush(ncct); |
---|
457 |
} |
---|
458 |
else { |
---|
459 |
int written; |
---|
460 |
written = write(ncct->pty_slave, sbuf, len); |
---|
461 |
if(written <= 0) goto socket_error; |
---|
462 |
assert(written == len); |
---|
463 |
} |
---|
464 |
} |
---|
465 |
if(buffer) { |
---|
466 |
char *cmd_buffer; |
---|
467 |
cmd_buffer = malloc(plen+1); |
---|
468 |
memcpy(cmd_buffer, buffer, plen); |
---|
469 |
/* chomp */ |
---|
470 |
cmd_buffer[plen] = '\0'; |
---|
471 |
if(cmd_buffer[plen-1] == '\n') cmd_buffer[plen-1] = '\0'; |
---|
472 |
noitL(noit_debug, "IN[%d]: '%s'\n", plen, cmd_buffer); |
---|
473 |
noit_console_dispatch(e, cmd_buffer, ncct); |
---|
474 |
free(cmd_buffer); |
---|
475 |
} |
---|
476 |
if(noit_console_continue_sending(ncct, &newmask) == -1) { |
---|
477 |
if(ncct->wants_shutdown || errno != EAGAIN) goto socket_error; |
---|
478 |
return newmask | EVENTER_EXCEPTION; |
---|
479 |
} |
---|
480 |
if(ncct->wants_shutdown) goto socket_error; |
---|
481 |
} |
---|
482 |
return newmask | EVENTER_EXCEPTION; |
---|
483 |
} |
---|
484 |
|
---|
485 |
static int |
---|
486 |
noit_console_logio_open(noit_log_stream_t ls) { |
---|
487 |
return 0; |
---|
488 |
} |
---|
489 |
static int |
---|
490 |
noit_console_logio_reopen(noit_log_stream_t ls) { |
---|
491 |
/* no op */ |
---|
492 |
return 0; |
---|
493 |
} |
---|
494 |
static int |
---|
495 |
noit_console_logio_write(noit_log_stream_t ls, const void *buf, size_t len) { |
---|
496 |
noit_console_closure_t ncct; |
---|
497 |
ncct = noit_log_stream_get_ctx(ls); |
---|
498 |
int rv, rlen, mask; |
---|
499 |
if(!ncct) return 0; |
---|
500 |
rlen = nc_write(ncct, buf, len); |
---|
501 |
while((rv = noit_console_continue_sending(ncct, &mask)) == -1 && errno == EINTR); |
---|
502 |
if(rv == -1 && errno == EAGAIN) { |
---|
503 |
eventer_update(ncct->e, mask | EVENTER_EXCEPTION); |
---|
504 |
} |
---|
505 |
return rlen; |
---|
506 |
} |
---|
507 |
static int |
---|
508 |
noit_console_logio_close(noit_log_stream_t ls) { |
---|
509 |
noit_console_closure_t ncct; |
---|
510 |
ncct = noit_log_stream_get_ctx(ls); |
---|
511 |
if(!ncct) return 0; |
---|
512 |
ncct->e = NULL; |
---|
513 |
noit_log_stream_set_ctx(ls, NULL); |
---|
514 |
return 0; |
---|
515 |
} |
---|
516 |
static logops_t noit_console_logio_ops = { |
---|
517 |
noit_console_logio_open, |
---|
518 |
noit_console_logio_reopen, |
---|
519 |
noit_console_logio_write, |
---|
520 |
NULL, |
---|
521 |
noit_console_logio_close, |
---|
522 |
NULL, |
---|
523 |
NULL |
---|
524 |
}; |
---|
525 |
|
---|
526 |
int |
---|
527 |
noit_console_write_xml(void *vncct, const char *buffer, int len) { |
---|
528 |
noit_console_closure_t ncct = vncct; |
---|
529 |
return nc_write(ncct, buffer, len); |
---|
530 |
} |
---|
531 |
|
---|
532 |
int |
---|
533 |
noit_console_close_xml(void *vncct) { |
---|
534 |
return 0; |
---|
535 |
} |
---|
536 |
|
---|
537 |
void |
---|
538 |
noit_console_init(const char *progname) { |
---|
539 |
if(progname) { |
---|
540 |
char buff[32]; |
---|
541 |
snprintf(buff, sizeof(buff), "%s# ", progname); |
---|
542 |
noit_console_set_default_prompt(buff); |
---|
543 |
} |
---|
544 |
el_multi_init(); |
---|
545 |
signal(SIGTTOU, SIG_IGN); |
---|
546 |
noit_register_logops("noit_console", &noit_console_logio_ops); |
---|
547 |
eventer_name_callback("noit_console", noit_console_handler); |
---|
548 |
} |
---|
549 |
|
---|