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From: 宋文武 <iyzsong@outlook.com>
To: Danny Milosavljevic <dannym@scratchpost.org>
Cc: 46481@debbugs.gnu.org
Subject: bug#46481: "guix download" with ftp URL doesn't work on IPv6 network
Date: Sun, 14 Feb 2021 12:08:09 +0800	[thread overview]
Message-ID: <OSZP286MB066415A300C10584FE301C39A3899@OSZP286MB0664.JPNP286.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <20210213033522.0196ffcf@scratchpost.org> (Danny Milosavljevic's message of "Sat, 13 Feb 2021 03:35:57 +0100")

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Danny Milosavljevic <dannym@scratchpost.org> writes:

> I strongly suspect there to be some problem with the ftp client since
> that's the second file that doesn't work using guix download but does work
> using wget, on the same computer.
>
> $ guix download ftp://ftp.denx.de/pub/u-boot/u-boot-2021.01.tar.bz2
>
> Starting download of /tmp/guix-file.tORPhj
> From ftp://ftp.denx.de/pub/u-boot/u-boot-2021.01.tar.bz2...
> Throw to key `ftp-error' with args `(#<input-output: socket 16> "PASV" 425 "You cannot use PASV on IPv6 connections. Use EPSV instead.\r")'.
> failed to download "/tmp/guix-file.tORPhj" from "ftp://ftp.denx.de/pub/u-boot/u-boot-2021.01.tar.bz2"
> guix download: error: ftp://ftp.denx.de/pub/u-boot/u-boot-2021.01.tar.bz2: download failed

Yes, with this patch I can get it work:

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From 568ea9cc0e07eab24c7d24e228d7d391f191feca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=8B=E6=96=87=E6=AD=A6?= <iyzsong@member.fsf.org>
Date: Sun, 14 Feb 2021 12:02:57 +0800
Subject: [PATCH] ftp-client: Before 'PASV', try 'EPSV' first for IPv6.

This fixes <https://bugs.gnu.org/46481>.

* guix/ftp-client.scm (ftp-epsv, ftp-passive): New procedure.
(ftp-list, ftp-retr): Replace call to 'ftp-pasv' with 'ftp-passive'.
---
 guix/ftp-client.scm | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/guix/ftp-client.scm b/guix/ftp-client.scm
index 8d5adcb8ed..a72057d3f5 100644
--- a/guix/ftp-client.scm
+++ b/guix/ftp-client.scm
@@ -216,6 +216,19 @@ TIMEOUT, an ETIMEDOUT error is raised."
           (else
            (throw 'ftp-error conn "PASV" 227 message)))))
 
+(define (ftp-epsv conn)
+  (let* ((message (%ftp-command "EPSV" 229 (ftp-connection-socket conn))))
+    (string->number
+     (match:substring
+      (string-match "\\(...([0-9]+).\\)" message) 1))))
+
+(define (ftp-passive conn)
+  "Enter passive mode using EPSV or PASV, return a data connection port on
+success."
+  ;; IPv6 only works with EPSV, so try it first.
+  (or (false-if-exception (ftp-epsv conn))
+      (ftp-pasv conn)))
+
 (define (address-with-port sa port)
   "Return a socket-address object based on SA, but with PORT."
   (let ((fam  (sockaddr:fam sa))
@@ -232,7 +245,7 @@ TIMEOUT, an ETIMEDOUT error is raised."
   (if directory
       (ftp-chdir conn directory))
 
-  (let* ((port (ftp-pasv conn))
+  (let* ((port (ftp-passive conn))
          (ai   (ftp-connection-addrinfo conn))
          (s    (socket (addrinfo:fam ai) (addrinfo:socktype ai)
                        (addrinfo:protocol ai))))
@@ -281,7 +294,7 @@ must be closed before CONN can be used for other purposes."
   ;; Ask for "binary mode".
   (%ftp-command "TYPE I" 200 (ftp-connection-socket conn))
 
-  (let* ((port (ftp-pasv conn))
+  (let* ((port (ftp-passive conn))
          (ai   (ftp-connection-addrinfo conn))
          (s    (with-fluids ((%default-port-encoding #f))
                  (socket (addrinfo:fam ai) (addrinfo:socktype ai)
-- 
2.30.0


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Okay to push?

  reply	other threads:[~2021-02-14  4:07 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-13  2:35 bug#46481: "guix download" with ftp URL doesn't work on IPv6 network Danny Milosavljevic
2021-02-14  4:08 ` 宋文武 [this message]
2021-02-14 19:28   ` Danny Milosavljevic
2021-02-15  0:40     ` 宋文武
2021-02-17  9:15 ` bug#46481: Léo Le Bouter via Bug reports for GNU Guix
2021-02-17 10:16   ` bug#46481: Tobias Geerinckx-Rice via Bug reports for GNU Guix
2021-02-17 11:47     ` bug#46481: Danny Milosavljevic

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