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From: Eric Sunshine <sunshine@sunshineco.com>
To: Jeff King <peff@peff.net>
Cc: Stefan Beller <sbeller@google.com>,
	Git List <git@vger.kernel.org>,
	Nguyễn Thái Ngọc <pclouds@gmail.com>,
	Junio C Hamano <gitster@pobox.com>
Subject: Re: [RFC/WIP PATCH 06/11] remote.h: add get_remote_capabilities, request_capabilities
Date: Wed, 27 May 2015 13:19:39 -0400
Message-ID: <CAPig+cQUtjVbdF5eEo0EH-QXz4q_UqOtoFZ5DcTNzceCxWLS=A@mail.gmail.com> (raw)
In-Reply-To: <20150527065030.GE885@peff.net>

On Wed, May 27, 2015 at 2:50 AM, Jeff King <peff@peff.net> wrote:
> On Tue, May 26, 2015 at 11:25:05PM -0400, Eric Sunshine wrote:
>
>> > +               len = packet_read(in, &src_buf, &src_len,
>> > +                                 packet_buffer, sizeof(packet_buffer),
>> > +                                 PACKET_READ_GENTLE_ON_EOF |
>> > +                                 PACKET_READ_CHOMP_NEWLINE);
>> > +               if (len < 0)
>> > +                       die_initial_contact(0);
>> > +
>> > +               if (!len)
>> > +                       break;
>> > +
>> > +               if (len > 4 && skip_prefix(line, "ERR ", &arg))
>>
>> The 'len > 4' check is needed because there's no guarantee that 'line'
>> is NUL-terminated. Correct?
>
> I think this was just blindly copied from get_remote_heads(). And I
> think that code was being overly paranoid. Ever since f3a3214 (Make
> send/receive-pack be closer to doing something interesting, 2005-06-29),
> the pkt-line reader will add an extra NUL to the buffer to ease cases
> like this.

Thanks. I had started digging into packet_read() to determine whether
it guaranteed NUL-termination, but didn't get far enough to decide. I
agree that if NUL-termination is guaranteed, then the 'len > 4' check
is superfluous (and confusing, which is why it caught my attention in
the first place).

  reply index

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-26 22:01 [RFC/WIP PATCH 00/11] Protocol version 2, again! Stefan Beller
2015-05-26 22:01 ` [RFC/WIP PATCH 01/11] upload-pack: make client capability parsing code a separate function Stefan Beller
2015-05-26 22:01 ` [RFC/WIP PATCH 02/11] upload-pack: only accept capabilities on the first "want" line Stefan Beller
2015-05-26 22:17   ` Junio C Hamano
2015-05-26 22:20     ` Stefan Beller
2015-05-26 22:01 ` [RFC/WIP PATCH 03/11] upload-pack: move capabilities out of send_ref Stefan Beller
2015-05-26 22:01 ` [RFC/WIP PATCH 04/11] upload-pack-2: Implement the version 2 of upload-pack Stefan Beller
2015-05-27  2:30   ` Eric Sunshine
2015-05-27  6:35   ` Jeff King
2015-05-27 17:30     ` Eric Sunshine
2015-05-27 20:14       ` Jeff King
2015-05-27 17:40     ` Stefan Beller
2015-05-27 20:34       ` Jeff King
2015-05-27 20:45         ` Stefan Beller
2015-05-27 21:46           ` Jeff King
2015-05-26 22:01 ` [RFC/WIP PATCH 05/11] transport: add infrastructure to support a protocol version number Stefan Beller
2015-05-27  6:39   ` Jeff King
2015-05-27 19:01     ` Stefan Beller
2015-05-27 20:17       ` Jeff King
2015-05-27 19:10     ` Junio C Hamano
2015-05-26 22:01 ` [RFC/WIP PATCH 06/11] remote.h: add get_remote_capabilities, request_capabilities Stefan Beller
2015-05-27  3:25   ` Eric Sunshine
2015-05-27  6:50     ` Jeff King
2015-05-27 17:19       ` Eric Sunshine [this message]
2015-05-27 20:09         ` Jeff King
2015-05-27  6:45   ` Jeff King
2015-05-29 19:39     ` Stefan Beller
2015-05-29 22:08       ` Jeff King
2015-05-26 22:01 ` [RFC/WIP PATCH 07/11] fetch-pack: use the configured transport protocol Stefan Beller
2015-05-26 22:19   ` Junio C Hamano
2015-05-26 22:23     ` Stefan Beller
2015-05-27  6:53   ` Jeff King
2015-05-26 22:01 ` [RFC/WIP PATCH 08/11] transport: connect_setup appends protocol version number Stefan Beller
2015-05-26 22:21   ` Junio C Hamano
2015-05-26 22:31     ` Stefan Beller
2015-05-27  5:09       ` Junio C Hamano
2015-05-27  6:56         ` Jeff King
2015-05-27  3:33   ` Eric Sunshine
2015-05-27  7:02   ` Jeff King
2015-05-26 22:01 ` [RFC/WIP PATCH 09/11] transport: get_refs_via_connect exchanges capabilities before refs Stefan Beller
2015-05-27  5:37   ` Eric Sunshine
2015-05-27  7:06   ` Jeff King
2015-05-26 22:01 ` [RFC/WIP PATCH 10/11] t5544: add a test case for the new protocol Stefan Beller
2015-05-27  5:34   ` Eric Sunshine
2015-05-27  7:12   ` Jeff King
2015-05-26 22:01 ` [RFC/WIP PATCH 11/11] Document protocol version 2 Stefan Beller
2015-05-29 20:35   ` Junio C Hamano
2015-05-29 21:36     ` Stefan Beller
2015-05-29 21:52       ` Junio C Hamano
2015-05-29 22:21         ` Jeff King
2015-06-01 23:14           ` Stefan Beller
2015-06-01 23:40             ` Stefan Beller
2015-06-04 13:18               ` Jeff King
2015-06-04 17:01                 ` Junio C Hamano
2015-06-02 17:06             ` Junio C Hamano
2015-05-27  6:18 ` [RFC/WIP PATCH 00/11] Protocol version 2, again! Jeff King
2015-05-27  7:08   ` Jeff King
2015-06-01 17:49     ` Stefan Beller
2015-06-02 10:10       ` Duy Nguyen
2015-06-04 13:09       ` Jeff King
2015-06-04 16:44         ` Stefan Beller

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