(in-package :sb-bsd-sockets)
-#|| <a name="name-service"><h2>Name Service</h2></a>
-
-<p>Presently name service is implemented by calling whatever
-gethostbyname(2) uses. This may be any or all of /etc/hosts, NIS, DNS,
-or something completely different. Typically it's controlled by
-/etc/nsswitch.conf
-
-<p> Direct links to the asynchronous resolver(3) routines would be nice to have
-eventually, so that we can do DNS lookups in parallel with other things
-|#
(defclass host-ent ()
((name :initarg :name :accessor host-ent-name)
(aliases :initarg :aliases :accessor host-ent-aliases)
(address-type :initarg :type :accessor host-ent-address-type)
- ; presently always AF_INET
- (addresses :initarg :addresses :accessor host-ent-addresses)))
+ ; presently always AF_INET
+ (addresses :initarg :addresses :accessor host-ent-addresses))
+ ;; FIXME: Our Texinfo documentation extracter need at least his to spit
+ ;; out the signature. Real documentation would be better...
+ (:documentation ""))
-(defgeneric host-ent-address (host-ent))
+(defgeneric host-ent-address (host-ent)
+ ;; FIXME: Our Texinfo documentation extracter need at least his to spit
+ ;; out the signature. Real documentation would be better...
+ (:documentation ""))
(defmethod host-ent-address ((host-ent host-ent))
(car (host-ent-addresses host-ent)))
;(define-condition no-recovery-error (socket-error)) ; name server error
;(define-condition try-again-error (socket-error)) ; temporary
+(defun make-host-ent (h)
+ (if (sb-grovel::foreign-nullp h) (name-service-error "gethostbyname"))
+ (let* ((length (sockint::hostent-length h))
+ (aliases (loop for i = 0 then (1+ i)
+ for al = (sb-alien:deref (sockint::hostent-aliases h) i)
+ while al
+ collect al))
+ (addresses
+ (loop for i = 0 then (1+ i)
+ for ad = (sb-alien:deref (sockint::hostent-addresses h) i)
+ until (sb-alien:null-alien ad)
+ collect (ecase (sockint::hostent-type h)
+ (#.sockint::af-inet
+ (assert (= length 4))
+ (let ((addr (make-array 4 :element-type '(unsigned-byte 8))))
+ (loop for i from 0 below length
+ do (setf (elt addr i) (sb-alien:deref ad i)))
+ addr))
+ (#.sockint::af-local
+ (sb-alien:cast ad sb-alien:c-string))))))
+ (make-instance 'host-ent
+ :name (sockint::hostent-name h)
+ :type (sockint::hostent-type h)
+ :aliases aliases
+ :addresses addresses)))
+
(defun get-host-by-name (host-name)
"Returns a HOST-ENT instance for HOST-NAME or throws some kind of condition.
HOST-NAME may also be an IP address in dotted quad notation or some other
weird stuff - see gethostbyname(3) for grisly details."
- (let ((h (sockint::gethostbyname host-name)))
- (make-host-ent h)))
+ (make-host-ent (sockint::gethostbyname host-name)))
(defun get-host-by-address (address)
"Returns a HOST-ENT instance for ADDRESS, which should be a vector of
-(integer 0 255), or throws some kind of error. See gethostbyaddr(3) for
+ (integer 0 255), or throws some kind of error. See gethostbyaddr(3) for
grisly details."
- (let ((packed-addr (sockint::allocate-in-addr)))
- (loop for i from 0 to 3
- do (setf (sockint::in-addr-addr packed-addr i) (elt address i)))
- (make-host-ent
- (sb-sys:with-pinned-objects (packed-addr)
- (sockint::gethostbyaddr (sb-grovel::array-data-address packed-addr)
- 4
- sockint::af-inet)))))
-
-(defun make-host-ent (h)
- (if (sb-grovel::foreign-nullp h) (name-service-error "gethostbyname"))
- (let* ((local-h (sb-grovel::foreign-vector h 1 sockint::size-of-hostent))
- (length (sockint::hostent-length local-h))
- (aliases
- (loop for i = 0 then (1+ i)
- for al = (sb-sys:sap-ref-sap
- (sb-sys:int-sap (sockint::hostent-aliases local-h))
- (* i 4))
- until (= (sb-sys:sap-int al) 0)
- collect (sb-c-call::%naturalize-c-string al)))
- (address0 (sb-sys:sap-ref-sap (sb-sys:int-sap (sockint::hostent-addresses local-h)) 0))
- (addresses
- (loop for i = 0 then (+ length i)
- for ad = (sb-sys:sap-ref-32 address0 i)
- while (> ad 0)
- collect
- (sb-grovel::foreign-vector (sb-sys:sap+ address0 i) 1 length))))
- (make-instance 'host-ent
- :name (sb-c-call::%naturalize-c-string
- (sb-sys:int-sap (sockint::hostent-name local-h)))
- :type (sockint::hostent-type local-h)
- :aliases aliases
- :addresses addresses)))
+ (sockint::with-in-addr packed-addr ()
+ (let ((addr-vector (coerce address 'vector)))
+ (loop for i from 0 below (length addr-vector)
+ do (setf (sb-alien:deref (sockint::in-addr-addr packed-addr) i)
+ (elt addr-vector i)))
+ (make-host-ent (sockint::gethostbyaddr packed-addr
+ 4
+ sockint::af-inet)))))
;;; The remainder is my fault - gw
GET-NAME-SERVICE-ERRNO")
(defun name-service-error (where)
+ ;; FIXME: Our Texinfo documentation extracter need at least his to spit
+ ;; out the signature. Real documentation would be better...
+ ""
(get-name-service-errno)
;; Comment next to NETDB_INTERNAL in netdb.h says "See errno.".
;; This special case treatment hasn't actually been tested yet.
(if (= *name-service-errno* sockint::NETDB-INTERNAL)
(socket-error where)
(let ((condition
- (condition-for-name-service-errno *name-service-errno*)))
+ (condition-for-name-service-errno *name-service-errno*)))
(error condition :errno *name-service-errno* :syscall where))))
(define-condition name-service-error (condition)
((errno :initform nil
- :initarg :errno
- :reader name-service-error-errno)
+ :initarg :errno
+ :reader name-service-error-errno)
(symbol :initform nil :initarg :symbol :reader name-service-error-symbol)
(syscall :initform "an unknown location" :initarg :syscall :reader name-service-error-syscall))
(:report (lambda (c s)
- (let ((num (name-service-error-errno c)))
- (format s "Name service error in \"~A\": ~A (~A)"
- (name-service-error-syscall c)
- (or (name-service-error-symbol c)
- (name-service-error-errno c))
- (get-name-service-error-message num))))))
+ (let ((num (name-service-error-errno c)))
+ (format s "Name service error in \"~A\": ~A (~A)"
+ (name-service-error-syscall c)
+ (or (name-service-error-symbol c)
+ (name-service-error-errno c))
+ (get-name-service-error-message num))))))
(defmacro define-name-service-condition (symbol name)
`(progn
(defun get-name-service-errno ()
(setf *name-service-errno*
- (sb-alien:alien-funcall
- (sb-alien:extern-alien "get_h_errno" (function integer)))))
+ (sb-alien:alien-funcall
+ (sb-alien:extern-alien "get_h_errno" (function integer)))))
#-(and cmu solaris)
(progn
(defun get-name-service-error-message (num)
(hstrerror num))
)
-
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