123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186 |
- ;;; dig.el --- Domain Name System dig interface
- ;; Copyright (C) 2000-2012 Free Software Foundation, Inc.
- ;; Author: Simon Josefsson <simon@josefsson.org>
- ;; Keywords: DNS BIND dig comm
- ;; This file is part of GNU Emacs.
- ;; GNU Emacs is free software: you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation, either version 3 of the License, or
- ;; (at your option) any later version.
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
- ;;; Commentary:
- ;; This provide an interface for "dig".
- ;;
- ;; For interactive use, try M-x dig and type a hostname. Use `q' to quit
- ;; dig buffer.
- ;;
- ;; For use in elisp programs, call `dig-invoke' and use
- ;; `dig-extract-rr' to extract resource records.
- ;;; Release history:
- ;; 2000-10-28 posted on gnu.emacs.sources
- ;;; Code:
- (eval-when-compile (require 'cl))
- (defgroup dig nil
- "Dig configuration."
- :group 'comm)
- (defcustom dig-program "dig"
- "Name of dig (domain information groper) binary."
- :type 'file
- :group 'dig)
- (defcustom dig-dns-server nil
- "DNS server to query.
- If nil, use system defaults."
- :type '(choice (const :tag "System defaults")
- string)
- :group 'dig)
- (defcustom dig-font-lock-keywords
- '(("^;; [A-Z]+ SECTION:" 0 font-lock-keyword-face)
- ("^;;.*" 0 font-lock-comment-face)
- ("^; <<>>.*" 0 font-lock-type-face)
- ("^;.*" 0 font-lock-function-name-face))
- "Default expressions to highlight in dig mode."
- :type 'sexp
- :group 'dig)
- (defun dig-invoke (domain &optional
- query-type query-class query-option
- dig-option server)
- "Call dig with given arguments and return buffer containing output.
- DOMAIN is a string with a DNS domain. QUERY-TYPE is an optional
- string with a DNS type. QUERY-CLASS is an optional string with a DNS
- class. QUERY-OPTION is an optional string with dig \"query options\".
- DIG-OPTION is an optional string with parameters for the dig program.
- SERVER is an optional string with a domain name server to query.
- Dig is an external program found in the BIND name server distribution,
- and is a commonly available debugging tool."
- (let (buf cmdline)
- (setq buf (generate-new-buffer "*dig output*"))
- (if dig-option (push dig-option cmdline))
- (if query-option (push query-option cmdline))
- (if query-class (push query-class cmdline))
- (if query-type (push query-type cmdline))
- (push domain cmdline)
- (if server (push (concat "@" server) cmdline)
- (if dig-dns-server (push (concat "@" dig-dns-server) cmdline)))
- (apply 'call-process dig-program nil buf nil cmdline)
- buf))
- (defun dig-extract-rr (domain &optional type class)
- "Extract resource records for DOMAIN, TYPE and CLASS from buffer.
- Buffer should contain output generated by `dig-invoke'."
- (save-excursion
- (goto-char (point-min))
- (if (re-search-forward
- (concat domain "\\.?[\t ]+[0-9wWdDhHmMsS]+[\t ]+"
- (upcase (or class "IN")) "[\t ]+" (upcase (or type "A")))
- nil t)
- (let (b e)
- (end-of-line)
- (setq e (point))
- (beginning-of-line)
- (setq b (point))
- (when (search-forward " (" e t)
- (search-forward " )"))
- (end-of-line)
- (setq e (point))
- (buffer-substring b e))
- (and (re-search-forward (concat domain "\\.?[\t ]+[0-9wWdDhHmMsS]+[\t ]+"
- (upcase (or class "IN"))
- "[\t ]+CNAME[\t ]+\\(.*\\)$") nil t)
- (dig-extract-rr (match-string 1) type class)))))
- (defun dig-rr-get-pkix-cert (rr)
- (let (b e str)
- (string-match "[^\t ]+[\t ]+[0-9wWdDhHmMsS]+[\t ]+IN[\t ]+CERT[\t ]+\\(1\\|PKIX\\)[\t ]+[0-9]+[\t ]+[0-9]+[\t ]+(?" rr)
- (setq b (match-end 0))
- (string-match ")" rr)
- (setq e (match-beginning 0))
- (setq str (substring rr b e))
- (while (string-match "[\t \n\r]" str)
- (setq str (replace-match "" nil nil str)))
- str))
- ;; XEmacs does it like this. For Emacs, we have to set the
- ;; `font-lock-defaults' buffer-local variable.
- (put 'dig-mode 'font-lock-defaults '(dig-font-lock-keywords t))
- (put 'dig-mode 'mode-class 'special)
- (defvar dig-mode-map
- (let ((map (make-sparse-keymap)))
- (suppress-keymap map)
- (define-key map "q" 'dig-exit)
- map))
- (define-derived-mode dig-mode nil "Dig"
- "Major mode for displaying dig output."
- (buffer-disable-undo)
- (unless (featurep 'xemacs)
- (set (make-local-variable 'font-lock-defaults)
- '(dig-font-lock-keywords t)))
- (when (featurep 'font-lock)
- ;; FIXME: what is this for?? --Stef
- (font-lock-set-defaults))
- )
- (defun dig-exit ()
- "Quit dig output buffer."
- (interactive)
- (kill-buffer (current-buffer)))
- ;;;###autoload
- (defun dig (domain &optional
- query-type query-class query-option dig-option server)
- "Query addresses of a DOMAIN using dig, by calling `dig-invoke'.
- Optional arguments are passed to `dig-invoke'."
- (interactive "sHost: ")
- (switch-to-buffer
- (dig-invoke domain query-type query-class query-option dig-option server))
- (goto-char (point-min))
- (and (search-forward ";; ANSWER SECTION:" nil t)
- (forward-line))
- (dig-mode)
- (setq buffer-read-only t)
- (set-buffer-modified-p nil))
- ;; named for consistency with query-dns in dns.el
- (defun query-dig (domain &optional
- query-type query-class query-option dig-option server)
- "Query addresses of a DOMAIN using dig.
- It works by calling `dig-invoke' and `dig-extract-rr'.
- Optional arguments are passed to `dig-invoke' and `dig-extract-rr'.
- Returns nil for domain/class/type queries that result in no data."
- (let ((buffer (dig-invoke domain query-type query-class
- query-option dig-option server)))
- (when buffer
- (switch-to-buffer buffer)
- (let ((digger (dig-extract-rr domain query-type query-class)))
- (kill-buffer buffer)
- digger))))
- (provide 'dig)
- ;;; dig.el ends here
|